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2002-11-30 Nathanael Nerode <neroden@gcc.gnu.org>
[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, Elf_Internal_Rela *dst));
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
41 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
42 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
43 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
44 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
45 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
46 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
47 static bfd_reloc_status_type ppc64_elf_toc_reloc
48 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
49 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
50 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
51 static bfd_reloc_status_type ppc64_elf_toc64_reloc
52 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
53 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
54 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
55 static boolean ppc64_elf_object_p
56 PARAMS ((bfd *));
57 static boolean ppc64_elf_merge_private_bfd_data
58 PARAMS ((bfd *, bfd *));
59
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* The size in bytes of an entry in the procedure linkage table. */
66 #define PLT_ENTRY_SIZE 24
67
68 /* The initial size of the plt reserved for the dynamic linker. */
69 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
70
71 /* TOC base pointers offset from start of TOC. */
72 #define TOC_BASE_OFF (0x8000)
73
74 /* .plt call stub instructions. */
75 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
76 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
77 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
78 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
79 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
80 /* ld %r11,xxx+16@l(%r12) */
81 #define BCTR 0x4e800420 /* bctr */
82
83 /* The normal stub is this size. */
84 #define PLT_CALL_STUB_SIZE (7*4)
85
86 /* But sometimes the .plt entry crosses a 64k boundary, and we need
87 to adjust the high word with this insn. */
88 #define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */
89
90 /* The .glink fixup call stub is the same as the .plt call stub, but
91 the first instruction restores r2, and the std is omitted. */
92 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
93
94 /* Always allow this much space. */
95 #define GLINK_CALL_STUB_SIZE (8*4)
96
97 /* Pad with this. */
98 #define NOP 0x60000000
99
100 /* Some other nops. */
101 #define CROR_151515 0x4def7b82
102 #define CROR_313131 0x4ffffb82
103
104 /* .glink entries for the first 32k functions are two instructions. */
105 #define LI_R0_0 0x38000000 /* li %r0,0 */
106 #define B_DOT 0x48000000 /* b . */
107
108 /* After that, we need two instructions to load the index, followed by
109 a branch. */
110 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
111 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
112
113 /* Instructions to save and restore floating point regs. */
114 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
115 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
116 #define BLR 0x4e800020 /* blr */
117
118 /* Since .opd is an array of descriptors and each entry will end up
119 with identical R_PPC64_RELATIVE relocs, there is really no need to
120 propagate .opd relocs; The dynamic linker should be taught to
121 relocate .opd without reloc entries. */
122 #ifndef NO_OPD_RELOCS
123 #define NO_OPD_RELOCS 0
124 #endif
125 \f
126 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
127
128 /* Relocation HOWTO's. */
129 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max];
130
131 static reloc_howto_type ppc64_elf_howto_raw[] = {
132 /* This reloc does nothing. */
133 HOWTO (R_PPC64_NONE, /* type */
134 0, /* rightshift */
135 0, /* size (0 = byte, 1 = short, 2 = long) */
136 8, /* bitsize */
137 false, /* pc_relative */
138 0, /* bitpos */
139 complain_overflow_dont, /* complain_on_overflow */
140 bfd_elf_generic_reloc, /* special_function */
141 "R_PPC64_NONE", /* name */
142 false, /* partial_inplace */
143 0, /* src_mask */
144 0, /* dst_mask */
145 false), /* pcrel_offset */
146
147 /* A standard 32 bit relocation. */
148 HOWTO (R_PPC64_ADDR32, /* type */
149 0, /* rightshift */
150 2, /* size (0 = byte, 1 = short, 2 = long) */
151 32, /* bitsize */
152 false, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_bitfield, /* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_PPC64_ADDR32", /* name */
157 false, /* partial_inplace */
158 0, /* src_mask */
159 0xffffffff, /* dst_mask */
160 false), /* pcrel_offset */
161
162 /* An absolute 26 bit branch; the lower two bits must be zero.
163 FIXME: we don't check that, we just clear them. */
164 HOWTO (R_PPC64_ADDR24, /* type */
165 0, /* rightshift */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
167 26, /* bitsize */
168 false, /* pc_relative */
169 0, /* bitpos */
170 complain_overflow_bitfield, /* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_PPC64_ADDR24", /* name */
173 false, /* partial_inplace */
174 0, /* src_mask */
175 0x03fffffc, /* dst_mask */
176 false), /* pcrel_offset */
177
178 /* A standard 16 bit relocation. */
179 HOWTO (R_PPC64_ADDR16, /* type */
180 0, /* rightshift */
181 1, /* size (0 = byte, 1 = short, 2 = long) */
182 16, /* bitsize */
183 false, /* pc_relative */
184 0, /* bitpos */
185 complain_overflow_bitfield, /* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_PPC64_ADDR16", /* name */
188 false, /* partial_inplace */
189 0, /* src_mask */
190 0xffff, /* dst_mask */
191 false), /* pcrel_offset */
192
193 /* A 16 bit relocation without overflow. */
194 HOWTO (R_PPC64_ADDR16_LO, /* type */
195 0, /* rightshift */
196 1, /* size (0 = byte, 1 = short, 2 = long) */
197 16, /* bitsize */
198 false, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_dont,/* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC64_ADDR16_LO", /* name */
203 false, /* partial_inplace */
204 0, /* src_mask */
205 0xffff, /* dst_mask */
206 false), /* pcrel_offset */
207
208 /* Bits 16-31 of an address. */
209 HOWTO (R_PPC64_ADDR16_HI, /* type */
210 16, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 false, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_dont, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC64_ADDR16_HI", /* name */
218 false, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 false), /* pcrel_offset */
222
223 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
224 bits, treated as a signed number, is negative. */
225 HOWTO (R_PPC64_ADDR16_HA, /* type */
226 16, /* rightshift */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
228 16, /* bitsize */
229 false, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_dont, /* complain_on_overflow */
232 ppc64_elf_ha_reloc, /* special_function */
233 "R_PPC64_ADDR16_HA", /* name */
234 false, /* partial_inplace */
235 0, /* src_mask */
236 0xffff, /* dst_mask */
237 false), /* pcrel_offset */
238
239 /* An absolute 16 bit branch; the lower two bits must be zero.
240 FIXME: we don't check that, we just clear them. */
241 HOWTO (R_PPC64_ADDR14, /* type */
242 0, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 false, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_bitfield, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC64_ADDR14", /* name */
250 false, /* partial_inplace */
251 0, /* src_mask */
252 0x0000fffc, /* dst_mask */
253 false), /* pcrel_offset */
254
255 /* An absolute 16 bit branch, for which bit 10 should be set to
256 indicate that the branch is expected to be taken. The lower two
257 bits must be zero. */
258 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
259 0, /* rightshift */
260 2, /* size (0 = byte, 1 = short, 2 = long) */
261 16, /* bitsize */
262 false, /* pc_relative */
263 0, /* bitpos */
264 complain_overflow_bitfield, /* complain_on_overflow */
265 ppc64_elf_brtaken_reloc, /* special_function */
266 "R_PPC64_ADDR14_BRTAKEN",/* name */
267 false, /* partial_inplace */
268 0, /* src_mask */
269 0x0000fffc, /* dst_mask */
270 false), /* pcrel_offset */
271
272 /* An absolute 16 bit branch, for which bit 10 should be set to
273 indicate that the branch is not expected to be taken. The lower
274 two bits must be zero. */
275 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
276 0, /* rightshift */
277 2, /* size (0 = byte, 1 = short, 2 = long) */
278 16, /* bitsize */
279 false, /* pc_relative */
280 0, /* bitpos */
281 complain_overflow_bitfield, /* complain_on_overflow */
282 ppc64_elf_brtaken_reloc, /* special_function */
283 "R_PPC64_ADDR14_BRNTAKEN",/* name */
284 false, /* partial_inplace */
285 0, /* src_mask */
286 0x0000fffc, /* dst_mask */
287 false), /* pcrel_offset */
288
289 /* A relative 26 bit branch; the lower two bits must be zero. */
290 HOWTO (R_PPC64_REL24, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 26, /* bitsize */
294 true, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_signed, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC64_REL24", /* name */
299 false, /* partial_inplace */
300 0, /* src_mask */
301 0x03fffffc, /* dst_mask */
302 true), /* pcrel_offset */
303
304 /* A relative 16 bit branch; the lower two bits must be zero. */
305 HOWTO (R_PPC64_REL14, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 true, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_signed, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_REL14", /* name */
314 false, /* partial_inplace */
315 0, /* src_mask */
316 0x0000fffc, /* dst_mask */
317 true), /* pcrel_offset */
318
319 /* A relative 16 bit branch. Bit 10 should be set to indicate that
320 the branch is expected to be taken. The lower two bits must be
321 zero. */
322 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 true, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_signed, /* complain_on_overflow */
329 ppc64_elf_brtaken_reloc, /* special_function */
330 "R_PPC64_REL14_BRTAKEN", /* name */
331 false, /* partial_inplace */
332 0, /* src_mask */
333 0x0000fffc, /* dst_mask */
334 true), /* pcrel_offset */
335
336 /* A relative 16 bit branch. Bit 10 should be set to indicate that
337 the branch is not expected to be taken. The lower two bits must
338 be zero. */
339 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
340 0, /* rightshift */
341 2, /* size (0 = byte, 1 = short, 2 = long) */
342 16, /* bitsize */
343 true, /* pc_relative */
344 0, /* bitpos */
345 complain_overflow_signed, /* complain_on_overflow */
346 ppc64_elf_brtaken_reloc, /* special_function */
347 "R_PPC64_REL14_BRNTAKEN",/* name */
348 false, /* partial_inplace */
349 0, /* src_mask */
350 0x0000fffc, /* dst_mask */
351 true), /* pcrel_offset */
352
353 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
354 symbol. */
355 HOWTO (R_PPC64_GOT16, /* type */
356 0, /* rightshift */
357 1, /* size (0 = byte, 1 = short, 2 = long) */
358 16, /* bitsize */
359 false, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_signed, /* complain_on_overflow */
362 ppc64_elf_unhandled_reloc, /* special_function */
363 "R_PPC64_GOT16", /* name */
364 false, /* partial_inplace */
365 0, /* src_mask */
366 0xffff, /* dst_mask */
367 false), /* pcrel_offset */
368
369 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
370 the symbol. */
371 HOWTO (R_PPC64_GOT16_LO, /* type */
372 0, /* rightshift */
373 1, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 false, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_dont, /* complain_on_overflow */
378 ppc64_elf_unhandled_reloc, /* special_function */
379 "R_PPC64_GOT16_LO", /* name */
380 false, /* partial_inplace */
381 0, /* src_mask */
382 0xffff, /* dst_mask */
383 false), /* pcrel_offset */
384
385 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
386 the symbol. */
387 HOWTO (R_PPC64_GOT16_HI, /* type */
388 16, /* rightshift */
389 1, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
391 false, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_dont,/* complain_on_overflow */
394 ppc64_elf_unhandled_reloc, /* special_function */
395 "R_PPC64_GOT16_HI", /* name */
396 false, /* partial_inplace */
397 0, /* src_mask */
398 0xffff, /* dst_mask */
399 false), /* pcrel_offset */
400
401 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
402 the symbol. */
403 HOWTO (R_PPC64_GOT16_HA, /* type */
404 16, /* rightshift */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 false, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_dont,/* complain_on_overflow */
410 ppc64_elf_unhandled_reloc, /* special_function */
411 "R_PPC64_GOT16_HA", /* name */
412 false, /* partial_inplace */
413 0, /* src_mask */
414 0xffff, /* dst_mask */
415 false), /* pcrel_offset */
416
417 /* This is used only by the dynamic linker. The symbol should exist
418 both in the object being run and in some shared library. The
419 dynamic linker copies the data addressed by the symbol from the
420 shared library into the object, because the object being
421 run has to have the data at some particular address. */
422 HOWTO (R_PPC64_COPY, /* type */
423 0, /* rightshift */
424 0, /* this one is variable size */
425 0, /* bitsize */
426 false, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_dont, /* complain_on_overflow */
429 ppc64_elf_unhandled_reloc, /* special_function */
430 "R_PPC64_COPY", /* name */
431 false, /* partial_inplace */
432 0, /* src_mask */
433 0, /* dst_mask */
434 false), /* pcrel_offset */
435
436 /* Like R_PPC64_ADDR64, but used when setting global offset table
437 entries. */
438 HOWTO (R_PPC64_GLOB_DAT, /* type */
439 0, /* rightshift */
440 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
441 64, /* bitsize */
442 false, /* pc_relative */
443 0, /* bitpos */
444 complain_overflow_dont, /* complain_on_overflow */
445 ppc64_elf_unhandled_reloc, /* special_function */
446 "R_PPC64_GLOB_DAT", /* name */
447 false, /* partial_inplace */
448 0, /* src_mask */
449 ONES (64), /* dst_mask */
450 false), /* pcrel_offset */
451
452 /* Created by the link editor. Marks a procedure linkage table
453 entry for a symbol. */
454 HOWTO (R_PPC64_JMP_SLOT, /* type */
455 0, /* rightshift */
456 0, /* size (0 = byte, 1 = short, 2 = long) */
457 0, /* bitsize */
458 false, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_dont, /* complain_on_overflow */
461 ppc64_elf_unhandled_reloc, /* special_function */
462 "R_PPC64_JMP_SLOT", /* name */
463 false, /* partial_inplace */
464 0, /* src_mask */
465 0, /* dst_mask */
466 false), /* pcrel_offset */
467
468 /* Used only by the dynamic linker. When the object is run, this
469 doubleword64 is set to the load address of the object, plus the
470 addend. */
471 HOWTO (R_PPC64_RELATIVE, /* type */
472 0, /* rightshift */
473 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
474 64, /* bitsize */
475 false, /* pc_relative */
476 0, /* bitpos */
477 complain_overflow_dont, /* complain_on_overflow */
478 bfd_elf_generic_reloc, /* special_function */
479 "R_PPC64_RELATIVE", /* name */
480 false, /* partial_inplace */
481 0, /* src_mask */
482 ONES (64), /* dst_mask */
483 false), /* pcrel_offset */
484
485 /* Like R_PPC64_ADDR32, but may be unaligned. */
486 HOWTO (R_PPC64_UADDR32, /* type */
487 0, /* rightshift */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
489 32, /* bitsize */
490 false, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_bitfield, /* complain_on_overflow */
493 bfd_elf_generic_reloc, /* special_function */
494 "R_PPC64_UADDR32", /* name */
495 false, /* partial_inplace */
496 0, /* src_mask */
497 0xffffffff, /* dst_mask */
498 false), /* pcrel_offset */
499
500 /* Like R_PPC64_ADDR16, but may be unaligned. */
501 HOWTO (R_PPC64_UADDR16, /* type */
502 0, /* rightshift */
503 1, /* size (0 = byte, 1 = short, 2 = long) */
504 16, /* bitsize */
505 false, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_bitfield, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_PPC64_UADDR16", /* name */
510 false, /* partial_inplace */
511 0, /* src_mask */
512 0xffff, /* dst_mask */
513 false), /* pcrel_offset */
514
515 /* 32-bit PC relative. */
516 HOWTO (R_PPC64_REL32, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 true, /* pc_relative */
521 0, /* bitpos */
522 /* FIXME: Verify. Was complain_overflow_bitfield. */
523 complain_overflow_signed, /* complain_on_overflow */
524 bfd_elf_generic_reloc, /* special_function */
525 "R_PPC64_REL32", /* name */
526 false, /* partial_inplace */
527 0, /* src_mask */
528 0xffffffff, /* dst_mask */
529 true), /* pcrel_offset */
530
531 /* 32-bit relocation to the symbol's procedure linkage table. */
532 HOWTO (R_PPC64_PLT32, /* type */
533 0, /* rightshift */
534 2, /* size (0 = byte, 1 = short, 2 = long) */
535 32, /* bitsize */
536 false, /* pc_relative */
537 0, /* bitpos */
538 complain_overflow_bitfield, /* complain_on_overflow */
539 ppc64_elf_unhandled_reloc, /* special_function */
540 "R_PPC64_PLT32", /* name */
541 false, /* partial_inplace */
542 0, /* src_mask */
543 0xffffffff, /* dst_mask */
544 false), /* pcrel_offset */
545
546 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
547 FIXME: R_PPC64_PLTREL32 not supported. */
548 HOWTO (R_PPC64_PLTREL32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 true, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_signed, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC64_PLTREL32", /* name */
557 false, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 true), /* pcrel_offset */
561
562 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
563 the symbol. */
564 HOWTO (R_PPC64_PLT16_LO, /* type */
565 0, /* rightshift */
566 1, /* size (0 = byte, 1 = short, 2 = long) */
567 16, /* bitsize */
568 false, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_dont, /* complain_on_overflow */
571 ppc64_elf_unhandled_reloc, /* special_function */
572 "R_PPC64_PLT16_LO", /* name */
573 false, /* partial_inplace */
574 0, /* src_mask */
575 0xffff, /* dst_mask */
576 false), /* pcrel_offset */
577
578 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
579 the symbol. */
580 HOWTO (R_PPC64_PLT16_HI, /* type */
581 16, /* rightshift */
582 1, /* size (0 = byte, 1 = short, 2 = long) */
583 16, /* bitsize */
584 false, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_dont, /* complain_on_overflow */
587 ppc64_elf_unhandled_reloc, /* special_function */
588 "R_PPC64_PLT16_HI", /* name */
589 false, /* partial_inplace */
590 0, /* src_mask */
591 0xffff, /* dst_mask */
592 false), /* pcrel_offset */
593
594 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
595 the symbol. */
596 HOWTO (R_PPC64_PLT16_HA, /* type */
597 16, /* rightshift */
598 1, /* size (0 = byte, 1 = short, 2 = long) */
599 16, /* bitsize */
600 false, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_dont, /* complain_on_overflow */
603 ppc64_elf_unhandled_reloc, /* special_function */
604 "R_PPC64_PLT16_HA", /* name */
605 false, /* partial_inplace */
606 0, /* src_mask */
607 0xffff, /* dst_mask */
608 false), /* pcrel_offset */
609
610 /* 16-bit section relative relocation. */
611 HOWTO (R_PPC64_SECTOFF, /* type */
612 0, /* rightshift */
613 1, /* size (0 = byte, 1 = short, 2 = long) */
614 16, /* bitsize */
615 false, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_bitfield, /* complain_on_overflow */
618 ppc64_elf_sectoff_reloc, /* special_function */
619 "R_PPC64_SECTOFF", /* name */
620 false, /* partial_inplace */
621 0, /* src_mask */
622 0xffff, /* dst_mask */
623 false), /* pcrel_offset */
624
625 /* Like R_PPC64_SECTOFF, but no overflow warning. */
626 HOWTO (R_PPC64_SECTOFF_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 false, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 ppc64_elf_sectoff_reloc, /* special_function */
634 "R_PPC64_SECTOFF_LO", /* name */
635 false, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 false), /* pcrel_offset */
639
640 /* 16-bit upper half section relative relocation. */
641 HOWTO (R_PPC64_SECTOFF_HI, /* type */
642 16, /* rightshift */
643 1, /* size (0 = byte, 1 = short, 2 = long) */
644 16, /* bitsize */
645 false, /* pc_relative */
646 0, /* bitpos */
647 complain_overflow_dont, /* complain_on_overflow */
648 ppc64_elf_sectoff_reloc, /* special_function */
649 "R_PPC64_SECTOFF_HI", /* name */
650 false, /* partial_inplace */
651 0, /* src_mask */
652 0xffff, /* dst_mask */
653 false), /* pcrel_offset */
654
655 /* 16-bit upper half adjusted section relative relocation. */
656 HOWTO (R_PPC64_SECTOFF_HA, /* type */
657 16, /* rightshift */
658 1, /* size (0 = byte, 1 = short, 2 = long) */
659 16, /* bitsize */
660 false, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_dont, /* complain_on_overflow */
663 ppc64_elf_sectoff_ha_reloc, /* special_function */
664 "R_PPC64_SECTOFF_HA", /* name */
665 false, /* partial_inplace */
666 0, /* src_mask */
667 0xffff, /* dst_mask */
668 false), /* pcrel_offset */
669
670 /* Like R_PPC64_REL24 without touching the two least significant
671 bits. Should have been named R_PPC64_REL30! */
672 HOWTO (R_PPC64_ADDR30, /* type */
673 2, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 30, /* bitsize */
676 true, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_dont, /* complain_on_overflow */
679 bfd_elf_generic_reloc, /* special_function */
680 "R_PPC64_ADDR30", /* name */
681 false, /* partial_inplace */
682 0, /* src_mask */
683 0xfffffffc, /* dst_mask */
684 true), /* pcrel_offset */
685
686 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
687
688 /* A standard 64-bit relocation. */
689 HOWTO (R_PPC64_ADDR64, /* type */
690 0, /* rightshift */
691 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
692 64, /* bitsize */
693 false, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_dont, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC64_ADDR64", /* name */
698 false, /* partial_inplace */
699 0, /* src_mask */
700 ONES (64), /* dst_mask */
701 false), /* pcrel_offset */
702
703 /* The bits 32-47 of an address. */
704 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
705 32, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 false, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC64_ADDR16_HIGHER", /* name */
713 false, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 false), /* pcrel_offset */
717
718 /* The bits 32-47 of an address, plus 1 if the contents of the low
719 16 bits, treated as a signed number, is negative. */
720 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
721 32, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 false, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_dont, /* complain_on_overflow */
727 ppc64_elf_ha_reloc, /* special_function */
728 "R_PPC64_ADDR16_HIGHERA", /* name */
729 false, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 false), /* pcrel_offset */
733
734 /* The bits 48-63 of an address. */
735 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
736 48, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 false, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_dont, /* complain_on_overflow */
742 bfd_elf_generic_reloc, /* special_function */
743 "R_PPC64_ADDR16_HIGHEST", /* name */
744 false, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 false), /* pcrel_offset */
748
749 /* The bits 48-63 of an address, plus 1 if the contents of the low
750 16 bits, treated as a signed number, is negative. */
751 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
752 48, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 false, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 ppc64_elf_ha_reloc, /* special_function */
759 "R_PPC64_ADDR16_HIGHESTA", /* name */
760 false, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 false), /* pcrel_offset */
764
765 /* Like ADDR64, but may be unaligned. */
766 HOWTO (R_PPC64_UADDR64, /* type */
767 0, /* rightshift */
768 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
769 64, /* bitsize */
770 false, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 bfd_elf_generic_reloc, /* special_function */
774 "R_PPC64_UADDR64", /* name */
775 false, /* partial_inplace */
776 0, /* src_mask */
777 ONES (64), /* dst_mask */
778 false), /* pcrel_offset */
779
780 /* 64-bit relative relocation. */
781 HOWTO (R_PPC64_REL64, /* type */
782 0, /* rightshift */
783 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
784 64, /* bitsize */
785 true, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_dont, /* complain_on_overflow */
788 bfd_elf_generic_reloc, /* special_function */
789 "R_PPC64_REL64", /* name */
790 false, /* partial_inplace */
791 0, /* src_mask */
792 ONES (64), /* dst_mask */
793 true), /* pcrel_offset */
794
795 /* 64-bit relocation to the symbol's procedure linkage table. */
796 HOWTO (R_PPC64_PLT64, /* type */
797 0, /* rightshift */
798 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
799 64, /* bitsize */
800 false, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_dont, /* complain_on_overflow */
803 ppc64_elf_unhandled_reloc, /* special_function */
804 "R_PPC64_PLT64", /* name */
805 false, /* partial_inplace */
806 0, /* src_mask */
807 ONES (64), /* dst_mask */
808 false), /* pcrel_offset */
809
810 /* 64-bit PC relative relocation to the symbol's procedure linkage
811 table. */
812 /* FIXME: R_PPC64_PLTREL64 not supported. */
813 HOWTO (R_PPC64_PLTREL64, /* type */
814 0, /* rightshift */
815 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
816 64, /* bitsize */
817 true, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 ppc64_elf_unhandled_reloc, /* special_function */
821 "R_PPC64_PLTREL64", /* name */
822 false, /* partial_inplace */
823 0, /* src_mask */
824 ONES (64), /* dst_mask */
825 true), /* pcrel_offset */
826
827 /* 16 bit TOC-relative relocation. */
828
829 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
830 HOWTO (R_PPC64_TOC16, /* type */
831 0, /* rightshift */
832 1, /* size (0 = byte, 1 = short, 2 = long) */
833 16, /* bitsize */
834 false, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_signed, /* complain_on_overflow */
837 ppc64_elf_toc_reloc, /* special_function */
838 "R_PPC64_TOC16", /* name */
839 false, /* partial_inplace */
840 0, /* src_mask */
841 0xffff, /* dst_mask */
842 false), /* pcrel_offset */
843
844 /* 16 bit TOC-relative relocation without overflow. */
845
846 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
847 HOWTO (R_PPC64_TOC16_LO, /* type */
848 0, /* rightshift */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
850 16, /* bitsize */
851 false, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_toc_reloc, /* special_function */
855 "R_PPC64_TOC16_LO", /* name */
856 false, /* partial_inplace */
857 0, /* src_mask */
858 0xffff, /* dst_mask */
859 false), /* pcrel_offset */
860
861 /* 16 bit TOC-relative relocation, high 16 bits. */
862
863 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
864 HOWTO (R_PPC64_TOC16_HI, /* type */
865 16, /* rightshift */
866 1, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 false, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 ppc64_elf_toc_reloc, /* special_function */
872 "R_PPC64_TOC16_HI", /* name */
873 false, /* partial_inplace */
874 0, /* src_mask */
875 0xffff, /* dst_mask */
876 false), /* pcrel_offset */
877
878 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
879 contents of the low 16 bits, treated as a signed number, is
880 negative. */
881
882 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
883 HOWTO (R_PPC64_TOC16_HA, /* type */
884 16, /* rightshift */
885 1, /* size (0 = byte, 1 = short, 2 = long) */
886 16, /* bitsize */
887 false, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc64_elf_toc_ha_reloc, /* special_function */
891 "R_PPC64_TOC16_HA", /* name */
892 false, /* partial_inplace */
893 0, /* src_mask */
894 0xffff, /* dst_mask */
895 false), /* pcrel_offset */
896
897 /* 64-bit relocation; insert value of TOC base (.TOC.). */
898
899 /* R_PPC64_TOC 51 doubleword64 .TOC. */
900 HOWTO (R_PPC64_TOC, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 false, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_bitfield, /* complain_on_overflow */
907 ppc64_elf_toc64_reloc, /* special_function */
908 "R_PPC64_TOC", /* name */
909 false, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 false), /* pcrel_offset */
913
914 /* Like R_PPC64_GOT16, but also informs the link editor that the
915 value to relocate may (!) refer to a PLT entry which the link
916 editor (a) may replace with the symbol value. If the link editor
917 is unable to fully resolve the symbol, it may (b) create a PLT
918 entry and store the address to the new PLT entry in the GOT.
919 This permits lazy resolution of function symbols at run time.
920 The link editor may also skip all of this and just (c) emit a
921 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
922 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
923 HOWTO (R_PPC64_PLTGOT16, /* type */
924 0, /* rightshift */
925 1, /* size (0 = byte, 1 = short, 2 = long) */
926 16, /* bitsize */
927 false, /* pc_relative */
928 0, /* bitpos */
929 complain_overflow_signed, /* complain_on_overflow */
930 ppc64_elf_unhandled_reloc, /* special_function */
931 "R_PPC64_PLTGOT16", /* name */
932 false, /* partial_inplace */
933 0, /* src_mask */
934 0xffff, /* dst_mask */
935 false), /* pcrel_offset */
936
937 /* Like R_PPC64_PLTGOT16, but without overflow. */
938 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
939 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
940 0, /* rightshift */
941 1, /* size (0 = byte, 1 = short, 2 = long) */
942 16, /* bitsize */
943 false, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc64_elf_unhandled_reloc, /* special_function */
947 "R_PPC64_PLTGOT16_LO", /* name */
948 false, /* partial_inplace */
949 0, /* src_mask */
950 0xffff, /* dst_mask */
951 false), /* pcrel_offset */
952
953 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
954 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
955 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
956 16, /* rightshift */
957 1, /* size (0 = byte, 1 = short, 2 = long) */
958 16, /* bitsize */
959 false, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc64_elf_unhandled_reloc, /* special_function */
963 "R_PPC64_PLTGOT16_HI", /* name */
964 false, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 false), /* pcrel_offset */
968
969 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
970 1 if the contents of the low 16 bits, treated as a signed number,
971 is negative. */
972 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
973 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
974 16, /* rightshift */
975 1, /* size (0 = byte, 1 = short, 2 = long) */
976 16, /* bitsize */
977 false, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_dont,/* complain_on_overflow */
980 ppc64_elf_unhandled_reloc, /* special_function */
981 "R_PPC64_PLTGOT16_HA", /* name */
982 false, /* partial_inplace */
983 0, /* src_mask */
984 0xffff, /* dst_mask */
985 false), /* pcrel_offset */
986
987 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
988 HOWTO (R_PPC64_ADDR16_DS, /* type */
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 false, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_bitfield, /* complain_on_overflow */
995 bfd_elf_generic_reloc, /* special_function */
996 "R_PPC64_ADDR16_DS", /* name */
997 false, /* partial_inplace */
998 0, /* src_mask */
999 0xfffc, /* dst_mask */
1000 false), /* pcrel_offset */
1001
1002 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1003 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 false, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont,/* complain_on_overflow */
1010 bfd_elf_generic_reloc, /* special_function */
1011 "R_PPC64_ADDR16_LO_DS",/* name */
1012 false, /* partial_inplace */
1013 0, /* src_mask */
1014 0xfffc, /* dst_mask */
1015 false), /* pcrel_offset */
1016
1017 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1018 HOWTO (R_PPC64_GOT16_DS, /* type */
1019 0, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 false, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_signed, /* complain_on_overflow */
1025 ppc64_elf_unhandled_reloc, /* special_function */
1026 "R_PPC64_GOT16_DS", /* name */
1027 false, /* partial_inplace */
1028 0, /* src_mask */
1029 0xfffc, /* dst_mask */
1030 false), /* pcrel_offset */
1031
1032 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1033 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1034 0, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 false, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc64_elf_unhandled_reloc, /* special_function */
1041 "R_PPC64_GOT16_LO_DS", /* name */
1042 false, /* partial_inplace */
1043 0, /* src_mask */
1044 0xfffc, /* dst_mask */
1045 false), /* pcrel_offset */
1046
1047 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1048 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1049 0, /* rightshift */
1050 1, /* size (0 = byte, 1 = short, 2 = long) */
1051 16, /* bitsize */
1052 false, /* pc_relative */
1053 0, /* bitpos */
1054 complain_overflow_dont, /* complain_on_overflow */
1055 ppc64_elf_unhandled_reloc, /* special_function */
1056 "R_PPC64_PLT16_LO_DS", /* name */
1057 false, /* partial_inplace */
1058 0, /* src_mask */
1059 0xfffc, /* dst_mask */
1060 false), /* pcrel_offset */
1061
1062 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1063 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1064 0, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 false, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_bitfield, /* complain_on_overflow */
1070 ppc64_elf_sectoff_reloc, /* special_function */
1071 "R_PPC64_SECTOFF_DS", /* name */
1072 false, /* partial_inplace */
1073 0, /* src_mask */
1074 0xfffc, /* dst_mask */
1075 false), /* pcrel_offset */
1076
1077 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1078 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 false, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_sectoff_reloc, /* special_function */
1086 "R_PPC64_SECTOFF_LO_DS",/* name */
1087 false, /* partial_inplace */
1088 0, /* src_mask */
1089 0xfffc, /* dst_mask */
1090 false), /* pcrel_offset */
1091
1092 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1093 HOWTO (R_PPC64_TOC16_DS, /* type */
1094 0, /* rightshift */
1095 1, /* size (0 = byte, 1 = short, 2 = long) */
1096 16, /* bitsize */
1097 false, /* pc_relative */
1098 0, /* bitpos */
1099 complain_overflow_signed, /* complain_on_overflow */
1100 ppc64_elf_toc_reloc, /* special_function */
1101 "R_PPC64_TOC16_DS", /* name */
1102 false, /* partial_inplace */
1103 0, /* src_mask */
1104 0xfffc, /* dst_mask */
1105 false), /* pcrel_offset */
1106
1107 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1108 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1109 0, /* rightshift */
1110 1, /* size (0 = byte, 1 = short, 2 = long) */
1111 16, /* bitsize */
1112 false, /* pc_relative */
1113 0, /* bitpos */
1114 complain_overflow_dont, /* complain_on_overflow */
1115 ppc64_elf_toc_reloc, /* special_function */
1116 "R_PPC64_TOC16_LO_DS", /* name */
1117 false, /* partial_inplace */
1118 0, /* src_mask */
1119 0xfffc, /* dst_mask */
1120 false), /* pcrel_offset */
1121
1122 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1123 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1124 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1125 0, /* rightshift */
1126 1, /* size (0 = byte, 1 = short, 2 = long) */
1127 16, /* bitsize */
1128 false, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_signed, /* complain_on_overflow */
1131 ppc64_elf_unhandled_reloc, /* special_function */
1132 "R_PPC64_PLTGOT16_DS", /* name */
1133 false, /* partial_inplace */
1134 0, /* src_mask */
1135 0xfffc, /* dst_mask */
1136 false), /* pcrel_offset */
1137
1138 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1139 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1140 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1141 0, /* rightshift */
1142 1, /* size (0 = byte, 1 = short, 2 = long) */
1143 16, /* bitsize */
1144 false, /* pc_relative */
1145 0, /* bitpos */
1146 complain_overflow_dont, /* complain_on_overflow */
1147 ppc64_elf_unhandled_reloc, /* special_function */
1148 "R_PPC64_PLTGOT16_LO_DS",/* name */
1149 false, /* partial_inplace */
1150 0, /* src_mask */
1151 0xfffc, /* dst_mask */
1152 false), /* pcrel_offset */
1153
1154 /* GNU extension to record C++ vtable hierarchy. */
1155 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1156 0, /* rightshift */
1157 0, /* size (0 = byte, 1 = short, 2 = long) */
1158 0, /* bitsize */
1159 false, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_dont, /* complain_on_overflow */
1162 NULL, /* special_function */
1163 "R_PPC64_GNU_VTINHERIT", /* name */
1164 false, /* partial_inplace */
1165 0, /* src_mask */
1166 0, /* dst_mask */
1167 false), /* pcrel_offset */
1168
1169 /* GNU extension to record C++ vtable member usage. */
1170 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1171 0, /* rightshift */
1172 0, /* size (0 = byte, 1 = short, 2 = long) */
1173 0, /* bitsize */
1174 false, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_dont, /* complain_on_overflow */
1177 NULL, /* special_function */
1178 "R_PPC64_GNU_VTENTRY", /* name */
1179 false, /* partial_inplace */
1180 0, /* src_mask */
1181 0, /* dst_mask */
1182 false), /* pcrel_offset */
1183 };
1184
1185 \f
1186 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1187 be done. */
1188
1189 static void
1190 ppc_howto_init ()
1191 {
1192 unsigned int i, type;
1193
1194 for (i = 0;
1195 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1196 i++)
1197 {
1198 type = ppc64_elf_howto_raw[i].type;
1199 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1200 / sizeof (ppc64_elf_howto_table[0])));
1201 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1202 }
1203 }
1204
1205 static reloc_howto_type *
1206 ppc64_elf_reloc_type_lookup (abfd, code)
1207 bfd *abfd ATTRIBUTE_UNUSED;
1208 bfd_reloc_code_real_type code;
1209 {
1210 enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE;
1211
1212 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1213 /* Initialize howto table if needed. */
1214 ppc_howto_init ();
1215
1216 switch ((int) code)
1217 {
1218 default:
1219 return (reloc_howto_type *) NULL;
1220
1221 case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE;
1222 break;
1223 case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32;
1224 break;
1225 case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24;
1226 break;
1227 case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16;
1228 break;
1229 case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO;
1230 break;
1231 case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI;
1232 break;
1233 case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA;
1234 break;
1235 case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14;
1236 break;
1237 case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN;
1238 break;
1239 case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN;
1240 break;
1241 case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24;
1242 break;
1243 case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14;
1244 break;
1245 case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN;
1246 break;
1247 case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN;
1248 break;
1249 case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16;
1250 break;
1251 case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO;
1252 break;
1253 case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI;
1254 break;
1255 case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA;
1256 break;
1257 case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY;
1258 break;
1259 case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT;
1260 break;
1261 case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32;
1262 break;
1263 case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32;
1264 break;
1265 case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32;
1266 break;
1267 case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO;
1268 break;
1269 case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI;
1270 break;
1271 case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA;
1272 break;
1273 case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC64_SECTOFF;
1274 break;
1275 case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO;
1276 break;
1277 case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI;
1278 break;
1279 case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA;
1280 break;
1281 case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64;
1282 break;
1283 case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64;
1284 break;
1285 case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER;
1286 break;
1287 case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA;
1288 break;
1289 case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST;
1290 break;
1291 case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA;
1292 break;
1293 case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64;
1294 break;
1295 case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64;
1296 break;
1297 case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64;
1298 break;
1299 case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16;
1300 break;
1301 case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO;
1302 break;
1303 case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI;
1304 break;
1305 case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA;
1306 break;
1307 case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC;
1308 break;
1309 case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16;
1310 break;
1311 case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO;
1312 break;
1313 case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI;
1314 break;
1315 case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA;
1316 break;
1317 case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS;
1318 break;
1319 case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS;
1320 break;
1321 case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS;
1322 break;
1323 case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS;
1324 break;
1325 case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS;
1326 break;
1327 case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS;
1328 break;
1329 case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS;
1330 break;
1331 case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS;
1332 break;
1333 case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS;
1334 break;
1335 case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS;
1336 break;
1337 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS;
1338 break;
1339 case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT;
1340 break;
1341 case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY;
1342 break;
1343 }
1344
1345 return ppc64_elf_howto_table[(int) ppc_reloc];
1346 };
1347
1348 /* Set the howto pointer for a PowerPC ELF reloc. */
1349
1350 static void
1351 ppc64_elf_info_to_howto (abfd, cache_ptr, dst)
1352 bfd *abfd ATTRIBUTE_UNUSED;
1353 arelent *cache_ptr;
1354 Elf_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 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
1662 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
1663 {
1664 const char *msg;
1665
1666 if (bfd_big_endian (ibfd))
1667 msg = _("%s: compiled for a big endian system and target is little endian");
1668 else
1669 msg = _("%s: compiled for a little endian system and target is big endian");
1670
1671 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
1672
1673 bfd_set_error (bfd_error_wrong_format);
1674 return false;
1675 }
1676
1677 return true;
1678 }
1679 \f
1680 /* The following functions are specific to the ELF linker, while
1681 functions above are used generally. Those named ppc64_elf_* are
1682 called by the main ELF linker code. They appear in this file more
1683 or less in the order in which they are called. eg.
1684 ppc64_elf_check_relocs is called early in the link process,
1685 ppc64_elf_finish_dynamic_sections is one of the last functions
1686 called.
1687
1688 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
1689 functions have both a function code symbol and a function descriptor
1690 symbol. A call to foo in a relocatable object file looks like:
1691
1692 . .text
1693 . x:
1694 . bl .foo
1695 . nop
1696
1697 The function definition in another object file might be:
1698
1699 . .section .opd
1700 . foo: .quad .foo
1701 . .quad .TOC.@tocbase
1702 . .quad 0
1703 .
1704 . .text
1705 . .foo: blr
1706
1707 When the linker resolves the call during a static link, the branch
1708 unsurprisingly just goes to .foo and the .opd information is unused.
1709 If the function definition is in a shared library, things are a little
1710 different: The call goes via a plt call stub, the opd information gets
1711 copied to the plt, and the linker patches the nop.
1712
1713 . x:
1714 . bl .foo_stub
1715 . ld 2,40(1)
1716 .
1717 .
1718 . .foo_stub:
1719 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
1720 . addi 12,12,Lfoo@toc@l # is slightly optimised, but
1721 . std 2,40(1) # this is the general idea
1722 . ld 11,0(12)
1723 . ld 2,8(12)
1724 . mtctr 11
1725 . ld 11,16(12)
1726 . bctr
1727 .
1728 . .section .plt
1729 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
1730
1731 The "reloc ()" notation is supposed to indicate that the linker emits
1732 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
1733 copying.
1734
1735 What are the difficulties here? Well, firstly, the relocations
1736 examined by the linker in check_relocs are against the function code
1737 sym .foo, while the dynamic relocation in the plt is emitted against
1738 the function descriptor symbol, foo. Somewhere along the line, we need
1739 to carefully copy dynamic link information from one symbol to the other.
1740 Secondly, the generic part of the elf linker will make .foo a dynamic
1741 symbol as is normal for most other backends. We need foo dynamic
1742 instead, at least for an application final link. However, when
1743 creating a shared library containing foo, we need to have both symbols
1744 dynamic so that references to .foo are satisfied during the early
1745 stages of linking. Otherwise the linker might decide to pull in a
1746 definition from some other object, eg. a static library. */
1747
1748 /* The linker needs to keep track of the number of relocs that it
1749 decides to copy as dynamic relocs in check_relocs for each symbol.
1750 This is so that it can later discard them if they are found to be
1751 unnecessary. We store the information in a field extending the
1752 regular ELF linker hash table. */
1753
1754 struct ppc_dyn_relocs
1755 {
1756 struct ppc_dyn_relocs *next;
1757
1758 /* The input section of the reloc. */
1759 asection *sec;
1760
1761 /* Total number of relocs copied for the input section. */
1762 bfd_size_type count;
1763
1764 /* Number of pc-relative relocs copied for the input section. */
1765 bfd_size_type pc_count;
1766 };
1767
1768 /* Of those relocs that might be copied as dynamic relocs, this macro
1769 selects between relative and absolute types. */
1770
1771 #define IS_ABSOLUTE_RELOC(RTYPE) \
1772 ((RTYPE) != R_PPC64_REL32 \
1773 && (RTYPE) != R_PPC64_REL64 \
1774 && (RTYPE) != R_PPC64_ADDR30)
1775
1776 /* Section name for stubs is the associated section name plus this
1777 string. */
1778 #define STUB_SUFFIX ".stub"
1779
1780 /* Linker stubs.
1781 ppc_stub_long_branch:
1782 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
1783 destination, but a 24 bit branch in a stub section will reach.
1784 . b dest
1785
1786 ppc_stub_plt_branch:
1787 Similar to the above, but a 24 bit branch in the stub section won't
1788 reach its destination.
1789 . addis %r12,%r2,xxx@toc@ha
1790 . ld %r11,xxx@toc@l(%r12)
1791 . mtctr %r11
1792 . bctr
1793
1794 ppc_stub_plt_call:
1795 Used to call a function in a shared library.
1796 . addis %r12,%r2,xxx@toc@ha
1797 . std %r2,40(%r1)
1798 . ld %r11,xxx+0@toc@l(%r12)
1799 . ld %r2,xxx+8@toc@l(%r12)
1800 . mtctr %r11
1801 . ld %r11,xxx+16@toc@l(%r12)
1802 . bctr
1803 */
1804
1805 enum ppc_stub_type {
1806 ppc_stub_none,
1807 ppc_stub_long_branch,
1808 ppc_stub_plt_branch,
1809 ppc_stub_plt_call
1810 };
1811
1812 struct ppc_stub_hash_entry {
1813
1814 /* Base hash table entry structure. */
1815 struct bfd_hash_entry root;
1816
1817 /* The stub section. */
1818 asection *stub_sec;
1819
1820 /* Offset within stub_sec of the beginning of this stub. */
1821 bfd_vma stub_offset;
1822
1823 /* Given the symbol's value and its section we can determine its final
1824 value when building the stubs (so the stub knows where to jump. */
1825 bfd_vma target_value;
1826 asection *target_section;
1827
1828 enum ppc_stub_type stub_type;
1829
1830 /* The symbol table entry, if any, that this was derived from. */
1831 struct ppc_link_hash_entry *h;
1832
1833 /* Where this stub is being called from, or, in the case of combined
1834 stub sections, the first input section in the group. */
1835 asection *id_sec;
1836 };
1837
1838 struct ppc_branch_hash_entry {
1839
1840 /* Base hash table entry structure. */
1841 struct bfd_hash_entry root;
1842
1843 /* Offset within .branch_lt. */
1844 unsigned int offset;
1845
1846 /* Generation marker. */
1847 unsigned int iter;
1848 };
1849
1850 struct ppc_link_hash_entry
1851 {
1852 struct elf_link_hash_entry elf;
1853
1854 /* A pointer to the most recently used stub hash entry against this
1855 symbol. */
1856 struct ppc_stub_hash_entry *stub_cache;
1857
1858 /* Track dynamic relocs copied for this symbol. */
1859 struct ppc_dyn_relocs *dyn_relocs;
1860
1861 /* Link between function code and descriptor symbols. */
1862 struct elf_link_hash_entry *oh;
1863
1864 /* Flag function code and descriptor symbols. */
1865 unsigned int is_func:1;
1866 unsigned int is_func_descriptor:1;
1867 unsigned int is_entry:1;
1868 };
1869
1870 /* ppc64 ELF linker hash table. */
1871
1872 struct ppc_link_hash_table
1873 {
1874 struct elf_link_hash_table elf;
1875
1876 /* The stub hash table. */
1877 struct bfd_hash_table stub_hash_table;
1878
1879 /* Another hash table for plt_branch stubs. */
1880 struct bfd_hash_table branch_hash_table;
1881
1882 /* Linker stub bfd. */
1883 bfd *stub_bfd;
1884
1885 /* Linker call-backs. */
1886 asection * (*add_stub_section) PARAMS ((const char *, asection *));
1887 void (*layout_sections_again) PARAMS ((void));
1888
1889 /* Array to keep track of which stub sections have been created, and
1890 information on stub grouping. */
1891 struct map_stub {
1892 /* This is the section to which stubs in the group will be attached. */
1893 asection *link_sec;
1894 /* The stub section. */
1895 asection *stub_sec;
1896 } *stub_group;
1897
1898 /* Assorted information used by ppc64_elf_size_stubs. */
1899 int top_index;
1900 asection **input_list;
1901
1902 /* Short-cuts to get to dynamic linker sections. */
1903 asection *sgot;
1904 asection *srelgot;
1905 asection *splt;
1906 asection *srelplt;
1907 asection *sdynbss;
1908 asection *srelbss;
1909 asection *sglink;
1910 asection *sfpr;
1911 asection *sbrlt;
1912 asection *srelbrlt;
1913
1914 /* Set on error. */
1915 unsigned int stub_error;
1916
1917 /* Flag set when small branches are detected. Used to
1918 select suitable defaults for the stub group size. */
1919 unsigned int has_14bit_branch;
1920
1921 /* Set if we detect a reference undefined weak symbol. */
1922 unsigned int have_undefweak;
1923
1924 /* Incremented every time we size stubs. */
1925 unsigned int stub_iteration;
1926
1927 /* Small local sym to section mapping cache. */
1928 struct sym_sec_cache sym_sec;
1929 };
1930
1931 static struct bfd_hash_entry *stub_hash_newfunc
1932 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1933 static struct bfd_hash_entry *branch_hash_newfunc
1934 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1935 static struct bfd_hash_entry *link_hash_newfunc
1936 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1937 static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
1938 PARAMS ((bfd *));
1939 static void ppc64_elf_link_hash_table_free
1940 PARAMS ((struct bfd_link_hash_table *));
1941 static char *ppc_stub_name
1942 PARAMS ((const asection *, const asection *,
1943 const struct ppc_link_hash_entry *, const Elf_Internal_Rela *));
1944 static struct ppc_stub_hash_entry *ppc_get_stub_entry
1945 PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *,
1946 const Elf_Internal_Rela *, struct ppc_link_hash_table *));
1947 static struct ppc_stub_hash_entry *ppc_add_stub
1948 PARAMS ((const char *, asection *, struct ppc_link_hash_table *));
1949 static boolean create_linkage_sections
1950 PARAMS ((bfd *, struct bfd_link_info *));
1951 static boolean create_got_section
1952 PARAMS ((bfd *, struct bfd_link_info *));
1953 static boolean ppc64_elf_create_dynamic_sections
1954 PARAMS ((bfd *, struct bfd_link_info *));
1955 static void ppc64_elf_copy_indirect_symbol
1956 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
1957 struct elf_link_hash_entry *));
1958 static boolean ppc64_elf_check_relocs
1959 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1960 const Elf_Internal_Rela *));
1961 static asection * ppc64_elf_gc_mark_hook
1962 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
1963 struct elf_link_hash_entry *, Elf_Internal_Sym *));
1964 static boolean ppc64_elf_gc_sweep_hook
1965 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1966 const Elf_Internal_Rela *));
1967 static boolean func_desc_adjust
1968 PARAMS ((struct elf_link_hash_entry *, PTR));
1969 static boolean ppc64_elf_func_desc_adjust
1970 PARAMS ((bfd *, struct bfd_link_info *));
1971 static boolean ppc64_elf_adjust_dynamic_symbol
1972 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
1973 static void ppc64_elf_hide_symbol
1974 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
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 (bed, dir, ind)
2444 struct elf_backend_data *bed;
2445 struct elf_link_hash_entry *dir, *ind;
2446 {
2447 struct ppc_link_hash_entry *edir, *eind;
2448
2449 edir = (struct ppc_link_hash_entry *) dir;
2450 eind = (struct ppc_link_hash_entry *) ind;
2451
2452 if (eind->dyn_relocs != NULL)
2453 {
2454 if (edir->dyn_relocs != NULL)
2455 {
2456 struct ppc_dyn_relocs **pp;
2457 struct ppc_dyn_relocs *p;
2458
2459 if (ind->root.type == bfd_link_hash_indirect)
2460 abort ();
2461
2462 /* Add reloc counts against the weak sym to the strong sym
2463 list. Merge any entries against the same section. */
2464 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2465 {
2466 struct ppc_dyn_relocs *q;
2467
2468 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2469 if (q->sec == p->sec)
2470 {
2471 q->pc_count += p->pc_count;
2472 q->count += p->count;
2473 *pp = p->next;
2474 break;
2475 }
2476 if (q == NULL)
2477 pp = &p->next;
2478 }
2479 *pp = edir->dyn_relocs;
2480 }
2481
2482 edir->dyn_relocs = eind->dyn_relocs;
2483 eind->dyn_relocs = NULL;
2484 }
2485
2486 edir->is_func |= eind->is_func;
2487 edir->is_func_descriptor |= eind->is_func_descriptor;
2488 edir->is_entry |= eind->is_entry;
2489
2490 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
2491 }
2492
2493 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
2494 symbols undefined on the command-line. */
2495
2496 boolean
2497 ppc64_elf_mark_entry_syms (info)
2498 struct bfd_link_info *info;
2499 {
2500 struct ppc_link_hash_table *htab;
2501 struct bfd_sym_chain *sym;
2502
2503 htab = ppc_hash_table (info);
2504 for (sym = info->gc_sym_list; sym; sym = sym->next)
2505 {
2506 struct elf_link_hash_entry *h;
2507
2508 h = elf_link_hash_lookup (&htab->elf, sym->name, false, false, false);
2509 if (h != NULL)
2510 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
2511 }
2512 return true;
2513 }
2514
2515 /* Look through the relocs for a section during the first phase, and
2516 calculate needed space in the global offset table, procedure
2517 linkage table, and dynamic reloc sections. */
2518
2519 static boolean
2520 ppc64_elf_check_relocs (abfd, info, sec, relocs)
2521 bfd *abfd;
2522 struct bfd_link_info *info;
2523 asection *sec;
2524 const Elf_Internal_Rela *relocs;
2525 {
2526 struct ppc_link_hash_table *htab;
2527 Elf_Internal_Shdr *symtab_hdr;
2528 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2529 const Elf_Internal_Rela *rel;
2530 const Elf_Internal_Rela *rel_end;
2531 asection *sreloc;
2532 asection **opd_sym_map;
2533
2534 if (info->relocateable)
2535 return true;
2536
2537 htab = ppc_hash_table (info);
2538 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2539
2540 sym_hashes = elf_sym_hashes (abfd);
2541 sym_hashes_end = (sym_hashes
2542 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
2543 - symtab_hdr->sh_info);
2544
2545 sreloc = NULL;
2546 opd_sym_map = NULL;
2547 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
2548 {
2549 /* Garbage collection needs some extra help with .opd sections.
2550 We don't want to necessarily keep everything referenced by
2551 relocs in .opd, as that would keep all functions. Instead,
2552 if we reference an .opd symbol (a function descriptor), we
2553 want to keep the function code symbol's section. This is
2554 easy for global symbols, but for local syms we need to keep
2555 information about the associated function section. Later, if
2556 edit_opd deletes entries, we'll use this array to adjust
2557 local syms in .opd. */
2558 union opd_info {
2559 asection *func_section;
2560 long entry_adjust;
2561 };
2562 bfd_size_type amt;
2563
2564 amt = sec->_raw_size * sizeof (union opd_info) / 24;
2565 opd_sym_map = (asection **) bfd_zalloc (abfd, amt);
2566 if (opd_sym_map == NULL)
2567 return false;
2568 elf_section_data (sec)->tdata = opd_sym_map;
2569 }
2570
2571 if (htab->elf.dynobj == NULL)
2572 htab->elf.dynobj = abfd;
2573 if (htab->sfpr == NULL
2574 && !create_linkage_sections (htab->elf.dynobj, info))
2575 return false;
2576
2577 rel_end = relocs + sec->reloc_count;
2578 for (rel = relocs; rel < rel_end; rel++)
2579 {
2580 unsigned long r_symndx;
2581 struct elf_link_hash_entry *h;
2582 enum elf_ppc_reloc_type r_type;
2583
2584 r_symndx = ELF64_R_SYM (rel->r_info);
2585 if (r_symndx < symtab_hdr->sh_info)
2586 h = NULL;
2587 else
2588 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2589
2590 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2591 switch (r_type)
2592 {
2593 /* GOT16 relocations */
2594 case R_PPC64_GOT16:
2595 case R_PPC64_GOT16_DS:
2596 case R_PPC64_GOT16_HA:
2597 case R_PPC64_GOT16_HI:
2598 case R_PPC64_GOT16_LO:
2599 case R_PPC64_GOT16_LO_DS:
2600
2601 /* This symbol requires a global offset table entry. */
2602 if (htab->sgot == NULL
2603 && !create_got_section (htab->elf.dynobj, info))
2604 return false;
2605
2606 if (h != NULL)
2607 {
2608 h->got.refcount += 1;
2609 }
2610 else
2611 {
2612 bfd_signed_vma *local_got_refcounts;
2613
2614 /* This is a global offset table entry for a local symbol. */
2615 local_got_refcounts = elf_local_got_refcounts (abfd);
2616 if (local_got_refcounts == NULL)
2617 {
2618 bfd_size_type size;
2619
2620 size = symtab_hdr->sh_info;
2621 size *= sizeof (bfd_signed_vma);
2622 local_got_refcounts = ((bfd_signed_vma *)
2623 bfd_zalloc (abfd, size));
2624 if (local_got_refcounts == NULL)
2625 return false;
2626 elf_local_got_refcounts (abfd) = local_got_refcounts;
2627 }
2628 local_got_refcounts[r_symndx] += 1;
2629 }
2630 break;
2631
2632 case R_PPC64_PLT16_HA:
2633 case R_PPC64_PLT16_HI:
2634 case R_PPC64_PLT16_LO:
2635 case R_PPC64_PLT32:
2636 case R_PPC64_PLT64:
2637 /* This symbol requires a procedure linkage table entry. We
2638 actually build the entry in adjust_dynamic_symbol,
2639 because this might be a case of linking PIC code without
2640 linking in any dynamic objects, in which case we don't
2641 need to generate a procedure linkage table after all. */
2642 if (h == NULL)
2643 {
2644 /* It does not make sense to have a procedure linkage
2645 table entry for a local symbol. */
2646 bfd_set_error (bfd_error_bad_value);
2647 return false;
2648 }
2649
2650 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2651 h->plt.refcount += 1;
2652 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2653 break;
2654
2655 /* The following relocations don't need to propagate the
2656 relocation if linking a shared object since they are
2657 section relative. */
2658 case R_PPC64_SECTOFF:
2659 case R_PPC64_SECTOFF_LO:
2660 case R_PPC64_SECTOFF_HI:
2661 case R_PPC64_SECTOFF_HA:
2662 case R_PPC64_SECTOFF_DS:
2663 case R_PPC64_SECTOFF_LO_DS:
2664 case R_PPC64_TOC16:
2665 case R_PPC64_TOC16_LO:
2666 case R_PPC64_TOC16_HI:
2667 case R_PPC64_TOC16_HA:
2668 case R_PPC64_TOC16_DS:
2669 case R_PPC64_TOC16_LO_DS:
2670 break;
2671
2672 /* This relocation describes the C++ object vtable hierarchy.
2673 Reconstruct it for later use during GC. */
2674 case R_PPC64_GNU_VTINHERIT:
2675 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2676 return false;
2677 break;
2678
2679 /* This relocation describes which C++ vtable entries are actually
2680 used. Record for later use during GC. */
2681 case R_PPC64_GNU_VTENTRY:
2682 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2683 return false;
2684 break;
2685
2686 case R_PPC64_REL14:
2687 case R_PPC64_REL14_BRTAKEN:
2688 case R_PPC64_REL14_BRNTAKEN:
2689 htab->has_14bit_branch = 1;
2690 /* Fall through. */
2691
2692 case R_PPC64_REL24:
2693 if (h != NULL
2694 && h->root.root.string[0] == '.'
2695 && h->root.root.string[1] != 0)
2696 {
2697 /* We may need a .plt entry if the function this reloc
2698 refers to is in a shared lib. */
2699 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2700 h->plt.refcount += 1;
2701 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2702 }
2703 break;
2704
2705 case R_PPC64_ADDR64:
2706 if (opd_sym_map != NULL
2707 && h != NULL
2708 && h->root.root.string[0] == '.'
2709 && h->root.root.string[1] != 0)
2710 {
2711 struct elf_link_hash_entry *fdh;
2712
2713 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
2714 false, false, false);
2715 if (fdh != NULL)
2716 {
2717 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
2718 ((struct ppc_link_hash_entry *) fdh)->oh = h;
2719 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2720 ((struct ppc_link_hash_entry *) h)->oh = fdh;
2721 }
2722 }
2723 if (opd_sym_map != NULL
2724 && h == NULL
2725 && rel + 1 < rel_end
2726 && ((enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info)
2727 == R_PPC64_TOC))
2728 {
2729 asection *s;
2730
2731 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
2732 r_symndx);
2733 if (s == NULL)
2734 return false;
2735 else if (s != sec)
2736 opd_sym_map[rel->r_offset / 24] = s;
2737 }
2738 /* Fall through. */
2739
2740 case R_PPC64_REL64:
2741 case R_PPC64_REL32:
2742 case R_PPC64_ADDR14:
2743 case R_PPC64_ADDR14_BRNTAKEN:
2744 case R_PPC64_ADDR14_BRTAKEN:
2745 case R_PPC64_ADDR16:
2746 case R_PPC64_ADDR16_DS:
2747 case R_PPC64_ADDR16_HA:
2748 case R_PPC64_ADDR16_HI:
2749 case R_PPC64_ADDR16_HIGHER:
2750 case R_PPC64_ADDR16_HIGHERA:
2751 case R_PPC64_ADDR16_HIGHEST:
2752 case R_PPC64_ADDR16_HIGHESTA:
2753 case R_PPC64_ADDR16_LO:
2754 case R_PPC64_ADDR16_LO_DS:
2755 case R_PPC64_ADDR24:
2756 case R_PPC64_ADDR30:
2757 case R_PPC64_ADDR32:
2758 case R_PPC64_UADDR16:
2759 case R_PPC64_UADDR32:
2760 case R_PPC64_UADDR64:
2761 case R_PPC64_TOC:
2762 /* Don't propagate .opd relocs. */
2763 if (NO_OPD_RELOCS && opd_sym_map != NULL)
2764 break;
2765
2766 /* If we are creating a shared library, and this is a reloc
2767 against a global symbol, or a non PC relative reloc
2768 against a local symbol, then we need to copy the reloc
2769 into the shared library. However, if we are linking with
2770 -Bsymbolic, we do not need to copy a reloc against a
2771 global symbol which is defined in an object we are
2772 including in the link (i.e., DEF_REGULAR is set). At
2773 this point we have not seen all the input files, so it is
2774 possible that DEF_REGULAR is not set now but will be set
2775 later (it is never cleared). In case of a weak definition,
2776 DEF_REGULAR may be cleared later by a strong definition in
2777 a shared library. We account for that possibility below by
2778 storing information in the relocs_copied field of the hash
2779 table entry. A similar situation occurs when creating
2780 shared libraries and symbol visibility changes render the
2781 symbol local.
2782
2783 If on the other hand, we are creating an executable, we
2784 may need to keep relocations for symbols satisfied by a
2785 dynamic library if we manage to avoid copy relocs for the
2786 symbol. */
2787 if ((info->shared
2788 && (sec->flags & SEC_ALLOC) != 0
2789 && (IS_ABSOLUTE_RELOC (r_type)
2790 || (h != NULL
2791 && (! info->symbolic
2792 || h->root.type == bfd_link_hash_defweak
2793 || (h->elf_link_hash_flags
2794 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2795 || (!info->shared
2796 && (sec->flags & SEC_ALLOC) != 0
2797 && h != NULL
2798 && (h->root.type == bfd_link_hash_defweak
2799 || (h->elf_link_hash_flags
2800 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
2801 {
2802 struct ppc_dyn_relocs *p;
2803 struct ppc_dyn_relocs **head;
2804
2805 /* We must copy these reloc types into the output file.
2806 Create a reloc section in dynobj and make room for
2807 this reloc. */
2808 if (sreloc == NULL)
2809 {
2810 const char *name;
2811 bfd *dynobj;
2812
2813 name = (bfd_elf_string_from_elf_section
2814 (abfd,
2815 elf_elfheader (abfd)->e_shstrndx,
2816 elf_section_data (sec)->rel_hdr.sh_name));
2817 if (name == NULL)
2818 return false;
2819
2820 if (strncmp (name, ".rela", 5) != 0
2821 || strcmp (bfd_get_section_name (abfd, sec),
2822 name + 5) != 0)
2823 {
2824 (*_bfd_error_handler)
2825 (_("%s: bad relocation section name `%s\'"),
2826 bfd_archive_filename (abfd), name);
2827 bfd_set_error (bfd_error_bad_value);
2828 }
2829
2830 dynobj = htab->elf.dynobj;
2831 sreloc = bfd_get_section_by_name (dynobj, name);
2832 if (sreloc == NULL)
2833 {
2834 flagword flags;
2835
2836 sreloc = bfd_make_section (dynobj, name);
2837 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2838 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2839 if ((sec->flags & SEC_ALLOC) != 0)
2840 flags |= SEC_ALLOC | SEC_LOAD;
2841 if (sreloc == NULL
2842 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2843 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
2844 return false;
2845 }
2846 elf_section_data (sec)->sreloc = sreloc;
2847 }
2848
2849 /* If this is a global symbol, we count the number of
2850 relocations we need for this symbol. */
2851 if (h != NULL)
2852 {
2853 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
2854 }
2855 else
2856 {
2857 /* Track dynamic relocs needed for local syms too.
2858 We really need local syms available to do this
2859 easily. Oh well. */
2860
2861 asection *s;
2862 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
2863 sec, r_symndx);
2864 if (s == NULL)
2865 return false;
2866
2867 head = ((struct ppc_dyn_relocs **)
2868 &elf_section_data (s)->local_dynrel);
2869 }
2870
2871 p = *head;
2872 if (p == NULL || p->sec != sec)
2873 {
2874 p = ((struct ppc_dyn_relocs *)
2875 bfd_alloc (htab->elf.dynobj,
2876 (bfd_size_type) sizeof *p));
2877 if (p == NULL)
2878 return false;
2879 p->next = *head;
2880 *head = p;
2881 p->sec = sec;
2882 p->count = 0;
2883 p->pc_count = 0;
2884 }
2885
2886 p->count += 1;
2887 if (!IS_ABSOLUTE_RELOC (r_type))
2888 p->pc_count += 1;
2889 }
2890 break;
2891
2892 default:
2893 break;
2894 }
2895 }
2896
2897 return true;
2898 }
2899
2900 /* Return the section that should be marked against GC for a given
2901 relocation. */
2902
2903 static asection *
2904 ppc64_elf_gc_mark_hook (sec, info, rel, h, sym)
2905 asection *sec;
2906 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2907 Elf_Internal_Rela *rel;
2908 struct elf_link_hash_entry *h;
2909 Elf_Internal_Sym *sym;
2910 {
2911 asection *rsec = NULL;
2912
2913 if (h != NULL)
2914 {
2915 enum elf_ppc_reloc_type r_type;
2916 struct ppc_link_hash_entry *fdh;
2917
2918 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2919 switch (r_type)
2920 {
2921 case R_PPC64_GNU_VTINHERIT:
2922 case R_PPC64_GNU_VTENTRY:
2923 break;
2924
2925 default:
2926 switch (h->root.type)
2927 {
2928 case bfd_link_hash_defined:
2929 case bfd_link_hash_defweak:
2930 fdh = (struct ppc_link_hash_entry *) h;
2931
2932 /* Function descriptor syms cause the associated
2933 function code sym section to be marked. */
2934 if (fdh->is_func_descriptor)
2935 rsec = fdh->oh->root.u.def.section;
2936
2937 /* Function entry syms return NULL if they are in .opd
2938 and are not ._start (or others undefined on the ld
2939 command line). Thus we avoid marking all function
2940 sections, as all functions are referenced in .opd. */
2941 else if ((fdh->oh != NULL
2942 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
2943 || elf_section_data (sec)->tdata == NULL)
2944 rsec = h->root.u.def.section;
2945 break;
2946
2947 case bfd_link_hash_common:
2948 rsec = h->root.u.c.p->section;
2949 break;
2950
2951 default:
2952 break;
2953 }
2954 }
2955 }
2956 else
2957 {
2958 asection **opd_sym_section;
2959
2960 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
2961 opd_sym_section = (asection **) elf_section_data (rsec)->tdata;
2962 if (opd_sym_section != NULL)
2963 rsec = opd_sym_section[sym->st_value / 24];
2964 else if (elf_section_data (sec)->tdata != NULL)
2965 rsec = NULL;
2966 }
2967
2968 return rsec;
2969 }
2970
2971 /* Update the .got, .plt. and dynamic reloc reference counts for the
2972 section being removed. */
2973
2974 static boolean
2975 ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
2976 bfd *abfd;
2977 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2978 asection *sec;
2979 const Elf_Internal_Rela *relocs;
2980 {
2981 Elf_Internal_Shdr *symtab_hdr;
2982 struct elf_link_hash_entry **sym_hashes;
2983 bfd_signed_vma *local_got_refcounts;
2984 const Elf_Internal_Rela *rel, *relend;
2985
2986 elf_section_data (sec)->local_dynrel = NULL;
2987
2988 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2989 sym_hashes = elf_sym_hashes (abfd);
2990 local_got_refcounts = elf_local_got_refcounts (abfd);
2991
2992 relend = relocs + sec->reloc_count;
2993 for (rel = relocs; rel < relend; rel++)
2994 {
2995 unsigned long r_symndx;
2996 enum elf_ppc_reloc_type r_type;
2997 struct elf_link_hash_entry *h;
2998
2999 r_symndx = ELF64_R_SYM (rel->r_info);
3000 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
3001 switch (r_type)
3002 {
3003 case R_PPC64_GOT16:
3004 case R_PPC64_GOT16_DS:
3005 case R_PPC64_GOT16_HA:
3006 case R_PPC64_GOT16_HI:
3007 case R_PPC64_GOT16_LO:
3008 case R_PPC64_GOT16_LO_DS:
3009 if (r_symndx >= symtab_hdr->sh_info)
3010 {
3011 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3012 if (h->got.refcount > 0)
3013 h->got.refcount--;
3014 }
3015 else
3016 {
3017 if (local_got_refcounts[r_symndx] > 0)
3018 local_got_refcounts[r_symndx]--;
3019 }
3020 break;
3021
3022 case R_PPC64_PLT16_HA:
3023 case R_PPC64_PLT16_HI:
3024 case R_PPC64_PLT16_LO:
3025 case R_PPC64_PLT32:
3026 case R_PPC64_PLT64:
3027 if (r_symndx >= symtab_hdr->sh_info)
3028 {
3029 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3030 if (h->plt.refcount > 0)
3031 h->plt.refcount--;
3032 }
3033 break;
3034
3035 case R_PPC64_REL14:
3036 case R_PPC64_REL14_BRNTAKEN:
3037 case R_PPC64_REL14_BRTAKEN:
3038 case R_PPC64_REL24:
3039 if (r_symndx >= symtab_hdr->sh_info)
3040 {
3041 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3042 if (h->plt.refcount > 0)
3043 h->plt.refcount--;
3044 }
3045 break;
3046
3047 case R_PPC64_REL32:
3048 case R_PPC64_REL64:
3049 if (r_symndx >= symtab_hdr->sh_info)
3050 {
3051 struct ppc_link_hash_entry *eh;
3052 struct ppc_dyn_relocs **pp;
3053 struct ppc_dyn_relocs *p;
3054
3055 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3056 eh = (struct ppc_link_hash_entry *) h;
3057
3058 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3059 if (p->sec == sec)
3060 {
3061 p->pc_count -= 1;
3062 p->count -= 1;
3063 if (p->count == 0)
3064 *pp = p->next;
3065 break;
3066 }
3067 }
3068 break;
3069
3070 case R_PPC64_ADDR14:
3071 case R_PPC64_ADDR14_BRNTAKEN:
3072 case R_PPC64_ADDR14_BRTAKEN:
3073 case R_PPC64_ADDR16:
3074 case R_PPC64_ADDR16_DS:
3075 case R_PPC64_ADDR16_HA:
3076 case R_PPC64_ADDR16_HI:
3077 case R_PPC64_ADDR16_HIGHER:
3078 case R_PPC64_ADDR16_HIGHERA:
3079 case R_PPC64_ADDR16_HIGHEST:
3080 case R_PPC64_ADDR16_HIGHESTA:
3081 case R_PPC64_ADDR16_LO:
3082 case R_PPC64_ADDR16_LO_DS:
3083 case R_PPC64_ADDR24:
3084 case R_PPC64_ADDR30:
3085 case R_PPC64_ADDR32:
3086 case R_PPC64_ADDR64:
3087 case R_PPC64_UADDR16:
3088 case R_PPC64_UADDR32:
3089 case R_PPC64_UADDR64:
3090 case R_PPC64_TOC:
3091 if (r_symndx >= symtab_hdr->sh_info)
3092 {
3093 struct ppc_link_hash_entry *eh;
3094 struct ppc_dyn_relocs **pp;
3095 struct ppc_dyn_relocs *p;
3096
3097 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3098 eh = (struct ppc_link_hash_entry *) h;
3099
3100 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3101 if (p->sec == sec)
3102 {
3103 p->count -= 1;
3104 if (p->count == 0)
3105 *pp = p->next;
3106 break;
3107 }
3108 }
3109 break;
3110
3111 default:
3112 break;
3113 }
3114 }
3115 return true;
3116 }
3117
3118 /* Called via elf_link_hash_traverse to transfer dynamic linking
3119 information on function code symbol entries to their corresponding
3120 function descriptor symbol entries. */
3121 static boolean
3122 func_desc_adjust (h, inf)
3123 struct elf_link_hash_entry *h;
3124 PTR inf;
3125 {
3126 struct bfd_link_info *info;
3127 struct ppc_link_hash_table *htab;
3128
3129 if (h->root.type == bfd_link_hash_indirect)
3130 return true;
3131
3132 if (h->root.type == bfd_link_hash_warning)
3133 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3134
3135 info = (struct bfd_link_info *) inf;
3136 htab = ppc_hash_table (info);
3137
3138 /* If this is a function code symbol, transfer dynamic linking
3139 information to the function descriptor symbol. */
3140 if (!((struct ppc_link_hash_entry *) h)->is_func)
3141 return true;
3142
3143 if (h->root.type == bfd_link_hash_undefweak
3144 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
3145 htab->have_undefweak = true;
3146
3147 if (h->plt.refcount > 0
3148 && h->root.root.string[0] == '.'
3149 && h->root.root.string[1] != '\0')
3150 {
3151 struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh;
3152 boolean force_local;
3153
3154 /* Find the corresponding function descriptor symbol. Create it
3155 as undefined if necessary. */
3156
3157 if (fdh == NULL)
3158 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
3159 false, false, true);
3160
3161 if (fdh == NULL
3162 && info->shared
3163 && (h->root.type == bfd_link_hash_undefined
3164 || h->root.type == bfd_link_hash_undefweak))
3165 {
3166 bfd *abfd;
3167 asymbol *newsym;
3168 struct bfd_link_hash_entry *bh;
3169
3170 abfd = h->root.u.undef.abfd;
3171 newsym = bfd_make_empty_symbol (abfd);
3172 newsym->name = h->root.root.string + 1;
3173 newsym->section = bfd_und_section_ptr;
3174 newsym->value = 0;
3175 newsym->flags = BSF_OBJECT;
3176 if (h->root.type == bfd_link_hash_undefweak)
3177 newsym->flags |= BSF_WEAK;
3178
3179 bh = &fdh->root;
3180 if ( !(_bfd_generic_link_add_one_symbol
3181 (info, abfd, newsym->name, newsym->flags,
3182 newsym->section, newsym->value, NULL, false, false, &bh)))
3183 {
3184 return false;
3185 }
3186 fdh = (struct elf_link_hash_entry *) bh;
3187 fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
3188 }
3189
3190 if (fdh != NULL
3191 && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
3192 && (info->shared
3193 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3194 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
3195 {
3196 if (fdh->dynindx == -1)
3197 if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
3198 return false;
3199 fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
3200 & (ELF_LINK_HASH_REF_REGULAR
3201 | ELF_LINK_HASH_REF_DYNAMIC
3202 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
3203 | ELF_LINK_NON_GOT_REF));
3204 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3205 {
3206 fdh->plt.refcount = h->plt.refcount;
3207 fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3208 }
3209 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
3210 ((struct ppc_link_hash_entry *) fdh)->oh = h;
3211 ((struct ppc_link_hash_entry *) h)->oh = fdh;
3212 }
3213
3214 /* Now that the info is on the function descriptor, clear the
3215 function code sym info. Any function code syms for which we
3216 don't have a definition in a regular file, we force local.
3217 This prevents a shared library from exporting syms that have
3218 been imported from another library. Function code syms that
3219 are really in the library we must leave global to prevent the
3220 linker dragging in a definition from a static library. */
3221 force_local = (info->shared
3222 && ((h->elf_link_hash_flags
3223 & ELF_LINK_HASH_DEF_REGULAR) == 0
3224 || fdh == NULL
3225 || (fdh->elf_link_hash_flags
3226 & ELF_LINK_HASH_DEF_REGULAR) == 0
3227 || (fdh->elf_link_hash_flags
3228 & ELF_LINK_FORCED_LOCAL) != 0));
3229 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
3230 }
3231
3232 return true;
3233 }
3234
3235 #define MIN_SAVE_FPR 14
3236 #define MAX_SAVE_FPR 31
3237
3238 /* Called near the start of bfd_elf_size_dynamic_sections. We use
3239 this hook to a) provide some gcc support functions, and b) transfer
3240 dynamic linking information gathered so far on function code symbol
3241 entries, to their corresponding function descriptor symbol entries. */
3242 static boolean
3243 ppc64_elf_func_desc_adjust (obfd, info)
3244 bfd *obfd ATTRIBUTE_UNUSED;
3245 struct bfd_link_info *info;
3246 {
3247 struct ppc_link_hash_table *htab;
3248 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
3249 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
3250 unsigned int i;
3251 struct elf_link_hash_entry *h;
3252 bfd_byte *p;
3253 char sym[10];
3254
3255 htab = ppc_hash_table (info);
3256
3257 if (htab->sfpr == NULL)
3258 /* We don't have any relocs. */
3259 return true;
3260
3261 /* First provide any missing ._savef* and ._restf* functions. */
3262 memcpy (sym, "._savef14", 10);
3263 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
3264 {
3265 sym[7] = i / 10 + '0';
3266 sym[8] = i % 10 + '0';
3267 h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
3268 if (h != NULL
3269 && h->root.type == bfd_link_hash_undefined)
3270 {
3271 if (lowest_savef > i)
3272 lowest_savef = i;
3273 h->root.type = bfd_link_hash_defined;
3274 h->root.u.def.section = htab->sfpr;
3275 h->root.u.def.value = (i - lowest_savef) * 4;
3276 h->type = STT_FUNC;
3277 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3278 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
3279 }
3280 }
3281
3282 memcpy (sym, "._restf14", 10);
3283 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
3284 {
3285 sym[7] = i / 10 + '0';
3286 sym[8] = i % 10 + '0';
3287 h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
3288 if (h != NULL
3289 && h->root.type == bfd_link_hash_undefined)
3290 {
3291 if (lowest_restf > i)
3292 lowest_restf = i;
3293 h->root.type = bfd_link_hash_defined;
3294 h->root.u.def.section = htab->sfpr;
3295 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
3296 + (i - lowest_restf) * 4);
3297 h->type = STT_FUNC;
3298 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3299 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
3300 }
3301 }
3302
3303 elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
3304
3305 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
3306 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
3307
3308 if (htab->sfpr->_raw_size == 0)
3309 {
3310 if (!htab->have_undefweak)
3311 {
3312 _bfd_strip_section_from_output (info, htab->sfpr);
3313 return true;
3314 }
3315
3316 htab->sfpr->_raw_size = 4;
3317 }
3318
3319 p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
3320 if (p == NULL)
3321 return false;
3322 htab->sfpr->contents = p;
3323
3324 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
3325 {
3326 unsigned int fpr = i << 21;
3327 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
3328 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
3329 p += 4;
3330 }
3331 if (lowest_savef <= MAX_SAVE_FPR)
3332 {
3333 bfd_put_32 (htab->elf.dynobj, BLR, p);
3334 p += 4;
3335 }
3336
3337 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
3338 {
3339 unsigned int fpr = i << 21;
3340 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
3341 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
3342 p += 4;
3343 }
3344 if (lowest_restf <= MAX_SAVE_FPR
3345 || htab->sfpr->_raw_size == 4)
3346 {
3347 bfd_put_32 (htab->elf.dynobj, BLR, p);
3348 }
3349
3350 return true;
3351 }
3352
3353 /* Adjust a symbol defined by a dynamic object and referenced by a
3354 regular object. The current definition is in some section of the
3355 dynamic object, but we're not including those sections. We have to
3356 change the definition to something the rest of the link can
3357 understand. */
3358
3359 static boolean
3360 ppc64_elf_adjust_dynamic_symbol (info, h)
3361 struct bfd_link_info *info;
3362 struct elf_link_hash_entry *h;
3363 {
3364 struct ppc_link_hash_table *htab;
3365 struct ppc_link_hash_entry * eh;
3366 struct ppc_dyn_relocs *p;
3367 asection *s;
3368 unsigned int power_of_two;
3369
3370 htab = ppc_hash_table (info);
3371
3372 /* Deal with function syms. */
3373 if (h->type == STT_FUNC
3374 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
3375 {
3376 /* Clear procedure linkage table information for any symbol that
3377 won't need a .plt entry. */
3378 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
3379 || h->plt.refcount <= 0
3380 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
3381 || (! info->shared
3382 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
3383 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
3384 {
3385 h->plt.offset = (bfd_vma) -1;
3386 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3387 }
3388 return true;
3389 }
3390 else
3391 h->plt.offset = (bfd_vma) -1;
3392
3393 /* If this is a weak symbol, and there is a real definition, the
3394 processor independent code will have arranged for us to see the
3395 real definition first, and we can just use the same value. */
3396 if (h->weakdef != NULL)
3397 {
3398 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
3399 || h->weakdef->root.type == bfd_link_hash_defweak);
3400 h->root.u.def.section = h->weakdef->root.u.def.section;
3401 h->root.u.def.value = h->weakdef->root.u.def.value;
3402 return true;
3403 }
3404
3405 /* This is a reference to a symbol defined by a dynamic object which
3406 is not a function. */
3407
3408 /* If we are creating a shared library, we must presume that the
3409 only references to the symbol are via the global offset table.
3410 For such cases we need not do anything here; the relocations will
3411 be handled correctly by relocate_section. */
3412 if (info->shared)
3413 return true;
3414
3415 /* If there are no references to this symbol that do not use the
3416 GOT, we don't need to generate a copy reloc. */
3417 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
3418 return true;
3419
3420 eh = (struct ppc_link_hash_entry *) h;
3421 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3422 {
3423 s = p->sec->output_section;
3424 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3425 break;
3426 }
3427
3428 /* If we didn't find any dynamic relocs in read-only sections, then
3429 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3430 if (p == NULL)
3431 {
3432 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
3433 return true;
3434 }
3435
3436 /* We must allocate the symbol in our .dynbss section, which will
3437 become part of the .bss section of the executable. There will be
3438 an entry for this symbol in the .dynsym section. The dynamic
3439 object will contain position independent code, so all references
3440 from the dynamic object to this symbol will go through the global
3441 offset table. The dynamic linker will use the .dynsym entry to
3442 determine the address it must put in the global offset table, so
3443 both the dynamic object and the regular object will refer to the
3444 same memory location for the variable. */
3445
3446 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3447 copy the initial value out of the dynamic object and into the
3448 runtime process image. We need to remember the offset into the
3449 .rela.bss section we are going to use. */
3450 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3451 {
3452 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
3453 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3454 }
3455
3456 /* We need to figure out the alignment required for this symbol. I
3457 have no idea how ELF linkers handle this. */
3458 power_of_two = bfd_log2 (h->size);
3459 if (power_of_two > 4)
3460 power_of_two = 4;
3461
3462 /* Apply the required alignment. */
3463 s = htab->sdynbss;
3464 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
3465 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3466 {
3467 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3468 return false;
3469 }
3470
3471 /* Define the symbol as being at this point in the section. */
3472 h->root.u.def.section = s;
3473 h->root.u.def.value = s->_raw_size;
3474
3475 /* Increment the section size to make room for the symbol. */
3476 s->_raw_size += h->size;
3477
3478 return true;
3479 }
3480
3481 /* If given a function descriptor symbol, hide both the function code
3482 sym and the descriptor. */
3483 static void
3484 ppc64_elf_hide_symbol (info, h, force_local)
3485 struct bfd_link_info *info;
3486 struct elf_link_hash_entry *h;
3487 boolean force_local;
3488 {
3489 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
3490
3491 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
3492 {
3493 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
3494
3495 if (fh == NULL)
3496 {
3497 const char *p, *q;
3498 struct ppc_link_hash_table *htab;
3499 char save;
3500
3501 /* We aren't supposed to use alloca in BFD because on
3502 systems which do not have alloca the version in libiberty
3503 calls xmalloc, which might cause the program to crash
3504 when it runs out of memory. This function doesn't have a
3505 return status, so there's no way to gracefully return an
3506 error. So cheat. We know that string[-1] can be safely
3507 dereferenced; It's either a string in an ELF string
3508 table, or allocated in an objalloc structure. */
3509
3510 p = h->root.root.string - 1;
3511 save = *p;
3512 *(char *) p = '.';
3513 htab = ppc_hash_table (info);
3514 fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
3515 *(char *) p = save;
3516
3517 /* Unfortunately, if it so happens that the string we were
3518 looking for was allocated immediately before this string,
3519 then we overwrote the string terminator. That's the only
3520 reason the lookup should fail. */
3521 if (fh == NULL)
3522 {
3523 q = h->root.root.string + strlen (h->root.root.string);
3524 while (q >= h->root.root.string && *q == *p)
3525 --q, --p;
3526 if (q < h->root.root.string && *p == '.')
3527 fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
3528 }
3529 if (fh != NULL)
3530 {
3531 ((struct ppc_link_hash_entry *) h)->oh = fh;
3532 ((struct ppc_link_hash_entry *) fh)->oh = h;
3533 }
3534 }
3535 if (fh != NULL)
3536 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
3537 }
3538 }
3539
3540 boolean
3541 ppc64_elf_edit_opd (obfd, info)
3542 bfd *obfd;
3543 struct bfd_link_info *info;
3544 {
3545 bfd *ibfd;
3546 unsigned int bfd_indx;
3547
3548 for (bfd_indx = 0, ibfd = info->input_bfds;
3549 ibfd != NULL;
3550 ibfd = ibfd->link_next, bfd_indx++)
3551 {
3552 asection *sec;
3553 Elf_Internal_Rela *relstart, *rel, *relend;
3554 Elf_Internal_Shdr *symtab_hdr;
3555 Elf_Internal_Sym *local_syms;
3556 struct elf_link_hash_entry **sym_hashes;
3557 bfd_vma offset;
3558 bfd_size_type amt;
3559 long *adjust;
3560 boolean need_edit;
3561
3562 sec = bfd_get_section_by_name (ibfd, ".opd");
3563 if (sec == NULL)
3564 continue;
3565
3566 amt = sec->_raw_size * sizeof (long) / 24;
3567 adjust = (long *) elf_section_data (sec)->tdata;
3568 if (adjust == NULL)
3569 {
3570 /* Must be a ld -r link. ie. check_relocs hasn't been
3571 called. */
3572 adjust = (long *) bfd_zalloc (obfd, amt);
3573 elf_section_data (sec)->tdata = adjust;
3574 }
3575 memset (adjust, 0, (size_t) amt);
3576
3577 if (sec->output_section == bfd_abs_section_ptr)
3578 continue;
3579
3580 /* Look through the section relocs. */
3581 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
3582 continue;
3583
3584 local_syms = NULL;
3585 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3586 sym_hashes = elf_sym_hashes (ibfd);
3587
3588 /* Read the relocations. */
3589 relstart = _bfd_elf64_link_read_relocs (obfd, sec, (PTR) NULL,
3590 (Elf_Internal_Rela *) NULL,
3591 info->keep_memory);
3592 if (relstart == NULL)
3593 return false;
3594
3595 /* First run through the relocs to check they are sane, and to
3596 determine whether we need to edit this opd section. */
3597 need_edit = false;
3598 offset = 0;
3599 relend = relstart + sec->reloc_count;
3600 for (rel = relstart; rel < relend; rel++)
3601 {
3602 enum elf_ppc_reloc_type r_type;
3603 unsigned long r_symndx;
3604 asection *sym_sec;
3605 struct elf_link_hash_entry *h;
3606 Elf_Internal_Sym *sym;
3607
3608 /* .opd contains a regular array of 24 byte entries. We're
3609 only interested in the reloc pointing to a function entry
3610 point. */
3611 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
3612 if (r_type == R_PPC64_TOC)
3613 continue;
3614
3615 if (r_type != R_PPC64_ADDR64)
3616 {
3617 (*_bfd_error_handler)
3618 (_("%s: unexpected reloc type %u in .opd section"),
3619 bfd_archive_filename (ibfd), r_type);
3620 need_edit = false;
3621 break;
3622 }
3623
3624 if (rel + 1 >= relend)
3625 continue;
3626 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info);
3627 if (r_type != R_PPC64_TOC)
3628 continue;
3629
3630 if (rel->r_offset != offset)
3631 {
3632 /* If someone messes with .opd alignment then after a
3633 "ld -r" we might have padding in the middle of .opd.
3634 Also, there's nothing to prevent someone putting
3635 something silly in .opd with the assembler. No .opd
3636 optimization for them! */
3637 (*_bfd_error_handler)
3638 (_("%s: .opd is not a regular array of opd entries"),
3639 bfd_archive_filename (ibfd));
3640 need_edit = false;
3641 break;
3642 }
3643
3644 r_symndx = ELF64_R_SYM (rel->r_info);
3645 sym_sec = NULL;
3646 h = NULL;
3647 sym = NULL;
3648 if (r_symndx >= symtab_hdr->sh_info)
3649 {
3650 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3651 while (h->root.type == bfd_link_hash_indirect
3652 || h->root.type == bfd_link_hash_warning)
3653 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3654 if (h->root.type == bfd_link_hash_defined
3655 || h->root.type == bfd_link_hash_defweak)
3656 sym_sec = h->root.u.def.section;
3657 }
3658 else
3659 {
3660 if (local_syms == NULL)
3661 {
3662 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3663 if (local_syms == NULL)
3664 local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3665 symtab_hdr->sh_info, 0,
3666 NULL, NULL, NULL);
3667 if (local_syms == NULL)
3668 goto error_free_rel;
3669 }
3670 sym = local_syms + r_symndx;
3671 if ((sym->st_shndx != SHN_UNDEF
3672 && sym->st_shndx < SHN_LORESERVE)
3673 || sym->st_shndx > SHN_HIRESERVE)
3674 sym_sec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
3675 }
3676
3677 if (sym_sec == NULL || sym_sec->owner == NULL)
3678 {
3679 (*_bfd_error_handler)
3680 (_("%s: undefined sym `%s' in .opd section"),
3681 bfd_archive_filename (ibfd),
3682 h != NULL ? h->root.root.string : "<local symbol>");
3683 need_edit = false;
3684 break;
3685 }
3686
3687 /* opd entries are always for functions defined in the
3688 current input bfd. If the symbol isn't defined in the
3689 input bfd, then we won't be using the function in this
3690 bfd; It must be defined in a linkonce section in another
3691 bfd, or is weak. It's also possible that we are
3692 discarding the function due to a linker script /DISCARD/,
3693 which we test for via the output_section. */
3694 if (sym_sec->owner != ibfd
3695 || sym_sec->output_section == bfd_abs_section_ptr)
3696 need_edit = true;
3697
3698 offset += 24;
3699 }
3700
3701 if (need_edit)
3702 {
3703 Elf_Internal_Rela *write_rel;
3704 bfd_byte *rptr, *wptr;
3705 boolean skip;
3706
3707 /* This seems a waste of time as input .opd sections are all
3708 zeros as generated by gcc, but I suppose there's no reason
3709 this will always be so. We might start putting something in
3710 the third word of .opd entries. */
3711 if ((sec->flags & SEC_IN_MEMORY) == 0)
3712 {
3713 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
3714 if (loc == NULL
3715 || !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0,
3716 sec->_raw_size))
3717 {
3718 if (local_syms != NULL
3719 && symtab_hdr->contents != (unsigned char *) local_syms)
3720 free (local_syms);
3721 error_free_rel:
3722 if (elf_section_data (sec)->relocs != relstart)
3723 free (relstart);
3724 return false;
3725 }
3726 sec->contents = loc;
3727 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
3728 }
3729
3730 elf_section_data (sec)->relocs = relstart;
3731
3732 wptr = sec->contents;
3733 rptr = sec->contents;
3734 write_rel = relstart;
3735 skip = false;
3736 offset = 0;
3737 for (rel = relstart; rel < relend; rel++)
3738 {
3739 if (rel->r_offset == offset)
3740 {
3741 unsigned long r_symndx;
3742 asection *sym_sec;
3743 struct elf_link_hash_entry *h;
3744 Elf_Internal_Sym *sym;
3745
3746 r_symndx = ELF64_R_SYM (rel->r_info);
3747 sym_sec = NULL;
3748 h = NULL;
3749 sym = NULL;
3750 if (r_symndx >= symtab_hdr->sh_info)
3751 {
3752 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3753 while (h->root.type == bfd_link_hash_indirect
3754 || h->root.type == bfd_link_hash_warning)
3755 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3756 if (h->root.type == bfd_link_hash_defined
3757 || h->root.type == bfd_link_hash_defweak)
3758 sym_sec = h->root.u.def.section;
3759 }
3760 else
3761 {
3762 sym = local_syms + r_symndx;
3763 if ((sym->st_shndx != SHN_UNDEF
3764 && sym->st_shndx < SHN_LORESERVE)
3765 || sym->st_shndx > SHN_HIRESERVE)
3766 sym_sec = bfd_section_from_elf_index (ibfd,
3767 sym->st_shndx);
3768 }
3769
3770 skip = (sym_sec->owner != ibfd
3771 || sym_sec->output_section == bfd_abs_section_ptr);
3772 if (skip)
3773 {
3774 if (h != NULL && sym_sec->owner == ibfd)
3775 {
3776 /* Arrange for the function descriptor sym
3777 to be dropped. */
3778 struct ppc_link_hash_entry *fdh;
3779 struct ppc_link_hash_entry *fh;
3780
3781 fh = (struct ppc_link_hash_entry *) h;
3782 fdh = (struct ppc_link_hash_entry *) fh->oh;
3783 if (fdh == NULL)
3784 {
3785 const char *fd_name;
3786 struct ppc_link_hash_table *htab;
3787
3788 fd_name = h->root.root.string + 1;
3789 htab = ppc_hash_table (info);
3790 fdh = (struct ppc_link_hash_entry *)
3791 elf_link_hash_lookup (&htab->elf, fd_name,
3792 false, false, false);
3793 fdh->is_func_descriptor = 1;
3794 fdh->oh = &fh->elf;
3795 fh->is_func = 1;
3796 fh->oh = &fdh->elf;
3797 }
3798
3799 fdh->elf.root.u.def.value = 0;
3800 fdh->elf.root.u.def.section = sym_sec;
3801 }
3802 }
3803 else
3804 {
3805 /* We'll be keeping this opd entry. */
3806
3807 if (h != NULL)
3808 {
3809 /* Redefine the function descriptor symbol
3810 to this location in the opd section.
3811 We've checked above that opd relocs are
3812 ordered. */
3813 struct ppc_link_hash_entry *fdh;
3814 struct ppc_link_hash_entry *fh;
3815
3816 fh = (struct ppc_link_hash_entry *) h;
3817 fdh = (struct ppc_link_hash_entry *) fh->oh;
3818 if (fdh == NULL)
3819 {
3820 const char *fd_name;
3821 struct ppc_link_hash_table *htab;
3822
3823 fd_name = h->root.root.string + 1;
3824 htab = ppc_hash_table (info);
3825 fdh = (struct ppc_link_hash_entry *)
3826 elf_link_hash_lookup (&htab->elf, fd_name,
3827 false, false, false);
3828 fdh->is_func_descriptor = 1;
3829 fdh->oh = &fh->elf;
3830 fh->is_func = 1;
3831 fh->oh = &fdh->elf;
3832 }
3833
3834 fdh->elf.root.u.def.value = wptr - sec->contents;
3835 }
3836 else
3837 {
3838 /* Local syms are a bit tricky. We could
3839 tweak them as they can be cached, but
3840 we'd need to look through the local syms
3841 for the function descriptor sym which we
3842 don't have at the moment. So keep an
3843 array of adjustments. */
3844 adjust[rel->r_offset / 24] = wptr - rptr;
3845 }
3846
3847 if (wptr != rptr)
3848 memcpy (wptr, rptr, 24);
3849 wptr += 24;
3850 }
3851 rptr += 24;
3852 offset += 24;
3853 }
3854
3855 /* We need to adjust any reloc offsets to point to the
3856 new opd entries. While we're at it, we may as well
3857 remove redundant relocs. */
3858 if (!skip)
3859 {
3860 rel->r_offset += wptr - rptr;
3861 if (write_rel != rel)
3862 memcpy (write_rel, rel, sizeof (*rel));
3863 ++write_rel;
3864 }
3865 }
3866
3867 sec->_cooked_size = wptr - sec->contents;
3868 sec->reloc_count = write_rel - relstart;
3869 /* Fudge the size too, as this is used later in
3870 elf_bfd_final_link if we are emitting relocs. */
3871 elf_section_data (sec)->rel_hdr.sh_size
3872 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
3873 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
3874 }
3875 else if (elf_section_data (sec)->relocs != relstart)
3876 free (relstart);
3877
3878 if (local_syms != NULL
3879 && symtab_hdr->contents != (unsigned char *) local_syms)
3880 {
3881 if (!info->keep_memory)
3882 free (local_syms);
3883 else
3884 symtab_hdr->contents = (unsigned char *) local_syms;
3885 }
3886 }
3887
3888 return true;
3889 }
3890
3891 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
3892 will be called from elflink.h. If elflink.h doesn't call our
3893 finish_dynamic_symbol routine, we'll need to do something about
3894 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
3895 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
3896 ((DYN) \
3897 && ((INFO)->shared \
3898 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3899 && ((H)->dynindx != -1 \
3900 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3901
3902 /* Allocate space in .plt, .got and associated reloc sections for
3903 dynamic relocs. */
3904
3905 static boolean
3906 allocate_dynrelocs (h, inf)
3907 struct elf_link_hash_entry *h;
3908 PTR inf;
3909 {
3910 struct bfd_link_info *info;
3911 struct ppc_link_hash_table *htab;
3912 asection *s;
3913 struct ppc_link_hash_entry *eh;
3914 struct ppc_dyn_relocs *p;
3915
3916 if (h->root.type == bfd_link_hash_indirect)
3917 return true;
3918
3919 if (h->root.type == bfd_link_hash_warning)
3920 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3921
3922 info = (struct bfd_link_info *) inf;
3923 htab = ppc_hash_table (info);
3924
3925 if (htab->elf.dynamic_sections_created
3926 && h->plt.refcount > 0
3927 && h->dynindx != -1)
3928 {
3929 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
3930
3931 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
3932 {
3933 /* If this is the first .plt entry, make room for the special
3934 first entry. */
3935 s = htab->splt;
3936 if (s->_raw_size == 0)
3937 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3938
3939 h->plt.offset = s->_raw_size;
3940
3941 /* Make room for this entry. */
3942 s->_raw_size += PLT_ENTRY_SIZE;
3943
3944 /* Make room for the .glink code. */
3945 s = htab->sglink;
3946 if (s->_raw_size == 0)
3947 s->_raw_size += GLINK_CALL_STUB_SIZE;
3948 /* We need bigger stubs past index 32767. */
3949 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
3950 s->_raw_size += 4;
3951 s->_raw_size += 2*4;
3952
3953 /* We also need to make an entry in the .rela.plt section. */
3954 s = htab->srelplt;
3955 s->_raw_size += sizeof (Elf64_External_Rela);
3956 }
3957 else
3958 {
3959 h->plt.offset = (bfd_vma) -1;
3960 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3961 }
3962 }
3963 else
3964 {
3965 h->plt.offset = (bfd_vma) -1;
3966 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3967 }
3968
3969 if (h->got.refcount > 0)
3970 {
3971 boolean dyn;
3972
3973 /* Make sure this symbol is output as a dynamic symbol.
3974 Undefined weak syms won't yet be marked as dynamic. */
3975 if (h->dynindx == -1
3976 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3977 {
3978 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3979 return false;
3980 }
3981
3982 s = htab->sgot;
3983 h->got.offset = s->_raw_size;
3984 s->_raw_size += 8;
3985 dyn = htab->elf.dynamic_sections_created;
3986 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
3987 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
3988 }
3989 else
3990 h->got.offset = (bfd_vma) -1;
3991
3992 eh = (struct ppc_link_hash_entry *) h;
3993 if (eh->dyn_relocs == NULL)
3994 return true;
3995
3996 /* In the shared -Bsymbolic case, discard space allocated for
3997 dynamic pc-relative relocs against symbols which turn out to be
3998 defined in regular objects. For the normal shared case, discard
3999 space for relocs that have become local due to symbol visibility
4000 changes. */
4001
4002 if (info->shared)
4003 {
4004 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
4005 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
4006 || info->symbolic))
4007 {
4008 struct ppc_dyn_relocs **pp;
4009
4010 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4011 {
4012 p->count -= p->pc_count;
4013 p->pc_count = 0;
4014 if (p->count == 0)
4015 *pp = p->next;
4016 else
4017 pp = &p->next;
4018 }
4019 }
4020 }
4021 else
4022 {
4023 /* For the non-shared case, discard space for relocs against
4024 symbols which turn out to need copy relocs or are not
4025 dynamic. */
4026
4027 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
4028 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4029 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4030 || (htab->elf.dynamic_sections_created
4031 && (h->root.type == bfd_link_hash_undefweak
4032 || h->root.type == bfd_link_hash_undefined))))
4033 {
4034 /* Make sure this symbol is output as a dynamic symbol.
4035 Undefined weak syms won't yet be marked as dynamic. */
4036 if (h->dynindx == -1
4037 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
4038 {
4039 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
4040 return false;
4041 }
4042
4043 /* If that succeeded, we know we'll be keeping all the
4044 relocs. */
4045 if (h->dynindx != -1)
4046 goto keep;
4047 }
4048
4049 eh->dyn_relocs = NULL;
4050
4051 keep: ;
4052 }
4053
4054 /* Finally, allocate space. */
4055 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4056 {
4057 asection *sreloc = elf_section_data (p->sec)->sreloc;
4058 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
4059 }
4060
4061 return true;
4062 }
4063
4064 /* Find any dynamic relocs that apply to read-only sections. */
4065
4066 static boolean
4067 readonly_dynrelocs (h, inf)
4068 struct elf_link_hash_entry *h;
4069 PTR inf;
4070 {
4071 struct ppc_link_hash_entry *eh;
4072 struct ppc_dyn_relocs *p;
4073
4074 if (h->root.type == bfd_link_hash_warning)
4075 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4076
4077 eh = (struct ppc_link_hash_entry *) h;
4078 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4079 {
4080 asection *s = p->sec->output_section;
4081
4082 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4083 {
4084 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4085
4086 info->flags |= DF_TEXTREL;
4087
4088 /* Not an error, just cut short the traversal. */
4089 return false;
4090 }
4091 }
4092 return true;
4093 }
4094
4095 /* Set the sizes of the dynamic sections. */
4096
4097 static boolean
4098 ppc64_elf_size_dynamic_sections (output_bfd, info)
4099 bfd *output_bfd ATTRIBUTE_UNUSED;
4100 struct bfd_link_info *info;
4101 {
4102 struct ppc_link_hash_table *htab;
4103 bfd *dynobj;
4104 asection *s;
4105 boolean relocs;
4106 bfd *ibfd;
4107
4108 htab = ppc_hash_table (info);
4109 dynobj = htab->elf.dynobj;
4110 if (dynobj == NULL)
4111 abort ();
4112
4113 if (htab->elf.dynamic_sections_created)
4114 {
4115 /* Set the contents of the .interp section to the interpreter. */
4116 if (! info->shared)
4117 {
4118 s = bfd_get_section_by_name (dynobj, ".interp");
4119 if (s == NULL)
4120 abort ();
4121 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
4122 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4123 }
4124 }
4125
4126 /* Set up .got offsets for local syms, and space for local dynamic
4127 relocs. */
4128 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4129 {
4130 bfd_signed_vma *local_got;
4131 bfd_signed_vma *end_local_got;
4132 bfd_size_type locsymcount;
4133 Elf_Internal_Shdr *symtab_hdr;
4134 asection *srel;
4135
4136 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4137 continue;
4138
4139 for (s = ibfd->sections; s != NULL; s = s->next)
4140 {
4141 struct ppc_dyn_relocs *p;
4142
4143 for (p = *((struct ppc_dyn_relocs **)
4144 &elf_section_data (s)->local_dynrel);
4145 p != NULL;
4146 p = p->next)
4147 {
4148 if (!bfd_is_abs_section (p->sec)
4149 && bfd_is_abs_section (p->sec->output_section))
4150 {
4151 /* Input section has been discarded, either because
4152 it is a copy of a linkonce section or due to
4153 linker script /DISCARD/, so we'll be discarding
4154 the relocs too. */
4155 }
4156 else if (p->count != 0)
4157 {
4158 srel = elf_section_data (p->sec)->sreloc;
4159 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
4160 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
4161 info->flags |= DF_TEXTREL;
4162 }
4163 }
4164 }
4165
4166 local_got = elf_local_got_refcounts (ibfd);
4167 if (!local_got)
4168 continue;
4169
4170 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4171 locsymcount = symtab_hdr->sh_info;
4172 end_local_got = local_got + locsymcount;
4173 s = htab->sgot;
4174 srel = htab->srelgot;
4175 for (; local_got < end_local_got; ++local_got)
4176 {
4177 if (*local_got > 0)
4178 {
4179 *local_got = s->_raw_size;
4180 s->_raw_size += 8;
4181 if (info->shared)
4182 srel->_raw_size += sizeof (Elf64_External_Rela);
4183 }
4184 else
4185 *local_got = (bfd_vma) -1;
4186 }
4187 }
4188
4189 /* Allocate global sym .plt and .got entries, and space for global
4190 sym dynamic relocs. */
4191 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
4192
4193 /* We now have determined the sizes of the various dynamic sections.
4194 Allocate memory for them. */
4195 relocs = false;
4196 for (s = dynobj->sections; s != NULL; s = s->next)
4197 {
4198 if ((s->flags & SEC_LINKER_CREATED) == 0)
4199 continue;
4200
4201 if (s == htab->sbrlt || s == htab->srelbrlt)
4202 /* These haven't been allocated yet; don't strip. */
4203 continue;
4204 else if (s == htab->splt
4205 || s == htab->sgot
4206 || s == htab->sglink)
4207 {
4208 /* Strip this section if we don't need it; see the
4209 comment below. */
4210 }
4211 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4212 {
4213 if (s->_raw_size == 0)
4214 {
4215 /* If we don't need this section, strip it from the
4216 output file. This is mostly to handle .rela.bss and
4217 .rela.plt. We must create both sections in
4218 create_dynamic_sections, because they must be created
4219 before the linker maps input sections to output
4220 sections. The linker does that before
4221 adjust_dynamic_symbol is called, and it is that
4222 function which decides whether anything needs to go
4223 into these sections. */
4224 }
4225 else
4226 {
4227 if (s != htab->srelplt)
4228 relocs = true;
4229
4230 /* We use the reloc_count field as a counter if we need
4231 to copy relocs into the output file. */
4232 s->reloc_count = 0;
4233 }
4234 }
4235 else
4236 {
4237 /* It's not one of our sections, so don't allocate space. */
4238 continue;
4239 }
4240
4241 if (s->_raw_size == 0)
4242 {
4243 _bfd_strip_section_from_output (info, s);
4244 continue;
4245 }
4246
4247 /* .plt is in the bss section. We don't initialise it. */
4248 if ((s->flags & SEC_LOAD) == 0)
4249 continue;
4250
4251 /* Allocate memory for the section contents. We use bfd_zalloc
4252 here in case unused entries are not reclaimed before the
4253 section's contents are written out. This should not happen,
4254 but this way if it does, we get a R_PPC64_NONE reloc instead
4255 of garbage. */
4256 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
4257 if (s->contents == NULL)
4258 return false;
4259 }
4260
4261 if (htab->elf.dynamic_sections_created)
4262 {
4263 /* Add some entries to the .dynamic section. We fill in the
4264 values later, in ppc64_elf_finish_dynamic_sections, but we
4265 must add the entries now so that we get the correct size for
4266 the .dynamic section. The DT_DEBUG entry is filled in by the
4267 dynamic linker and used by the debugger. */
4268 #define add_dynamic_entry(TAG, VAL) \
4269 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
4270
4271 if (!info->shared)
4272 {
4273 if (!add_dynamic_entry (DT_DEBUG, 0))
4274 return false;
4275 }
4276
4277 if (htab->splt != NULL && htab->splt->_raw_size != 0)
4278 {
4279 if (!add_dynamic_entry (DT_PLTGOT, 0)
4280 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4281 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4282 || !add_dynamic_entry (DT_JMPREL, 0)
4283 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
4284 return false;
4285 }
4286
4287 if (NO_OPD_RELOCS)
4288 {
4289 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
4290 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
4291 return false;
4292 }
4293
4294 if (relocs)
4295 {
4296 if (!add_dynamic_entry (DT_RELA, 0)
4297 || !add_dynamic_entry (DT_RELASZ, 0)
4298 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
4299 return false;
4300
4301 /* If any dynamic relocs apply to a read-only section,
4302 then we need a DT_TEXTREL entry. */
4303 if ((info->flags & DF_TEXTREL) == 0)
4304 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
4305 (PTR) info);
4306
4307 if ((info->flags & DF_TEXTREL) != 0)
4308 {
4309 if (!add_dynamic_entry (DT_TEXTREL, 0))
4310 return false;
4311 }
4312 }
4313 }
4314 #undef add_dynamic_entry
4315
4316 return true;
4317 }
4318
4319 /* Determine the type of stub needed, if any, for a call. */
4320
4321 static INLINE enum ppc_stub_type
4322 ppc_type_of_stub (input_sec, rel, hash, destination)
4323 asection *input_sec;
4324 const Elf_Internal_Rela *rel;
4325 struct ppc_link_hash_entry **hash;
4326 bfd_vma destination;
4327 {
4328 struct ppc_link_hash_entry *h = *hash;
4329 bfd_vma location;
4330 bfd_vma branch_offset;
4331 bfd_vma max_branch_offset;
4332 unsigned int r_type;
4333
4334 if (h != NULL)
4335 {
4336 if (h->oh != NULL
4337 && h->oh->plt.offset != (bfd_vma) -1
4338 && h->oh->dynindx != -1)
4339 {
4340 *hash = (struct ppc_link_hash_entry *) h->oh;
4341 return ppc_stub_plt_call;
4342 }
4343
4344 if (h->elf.root.type == bfd_link_hash_undefweak
4345 || h->elf.root.type == bfd_link_hash_undefined)
4346 return ppc_stub_none;
4347 }
4348
4349 /* Determine where the call point is. */
4350 location = (input_sec->output_offset
4351 + input_sec->output_section->vma
4352 + rel->r_offset);
4353
4354 branch_offset = destination - location;
4355 r_type = ELF64_R_TYPE (rel->r_info);
4356
4357 /* Determine if a long branch stub is needed. */
4358 max_branch_offset = 1 << 25;
4359 if (r_type != (unsigned int) R_PPC64_REL24)
4360 max_branch_offset = 1 << 15;
4361
4362 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
4363 /* We need a stub. Figure out whether a long_branch or plt_branch
4364 is needed later. */
4365 return ppc_stub_long_branch;
4366
4367 return ppc_stub_none;
4368 }
4369
4370 /* Build a .plt call stub. */
4371
4372 static bfd_byte *
4373 build_plt_stub (obfd, p, offset, glink)
4374 bfd *obfd;
4375 bfd_byte *p;
4376 int offset;
4377 int glink;
4378 {
4379 #define PPC_LO(v) ((v) & 0xffff)
4380 #define PPC_HI(v) (((v) >> 16) & 0xffff)
4381 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
4382
4383 if (glink)
4384 bfd_put_32 (obfd, LD_R2_40R1, p), p += 4;
4385 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
4386 if (!glink)
4387 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
4388 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
4389 if (PPC_HA (offset + 8) != PPC_HA (offset))
4390 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
4391 offset += 8;
4392 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
4393 if (PPC_HA (offset + 8) != PPC_HA (offset))
4394 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
4395 offset += 8;
4396 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
4397 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
4398 bfd_put_32 (obfd, BCTR, p), p += 4;
4399 return p;
4400 }
4401
4402 static boolean
4403 ppc_build_one_stub (gen_entry, in_arg)
4404 struct bfd_hash_entry *gen_entry;
4405 PTR in_arg;
4406 {
4407 struct ppc_stub_hash_entry *stub_entry;
4408 struct ppc_branch_hash_entry *br_entry;
4409 struct bfd_link_info *info;
4410 struct ppc_link_hash_table *htab;
4411 asection *stub_sec;
4412 bfd *stub_bfd;
4413 bfd_byte *loc;
4414 bfd_byte *p;
4415 unsigned int indx;
4416 bfd_vma off;
4417 int size;
4418
4419 /* Massage our args to the form they really have. */
4420 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
4421 info = (struct bfd_link_info *) in_arg;
4422
4423 htab = ppc_hash_table (info);
4424 stub_sec = stub_entry->stub_sec;
4425
4426 /* Make a note of the offset within the stubs for this entry. */
4427 stub_entry->stub_offset = stub_sec->_cooked_size;
4428 loc = stub_sec->contents + stub_entry->stub_offset;
4429
4430 stub_bfd = stub_sec->owner;
4431
4432 switch (stub_entry->stub_type)
4433 {
4434 case ppc_stub_long_branch:
4435 /* Branches are relative. This is where we are going to. */
4436 off = (stub_entry->target_value
4437 + stub_entry->target_section->output_offset
4438 + stub_entry->target_section->output_section->vma);
4439
4440 /* And this is where we are coming from. */
4441 off -= (stub_entry->stub_offset
4442 + stub_sec->output_offset
4443 + stub_sec->output_section->vma);
4444
4445 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
4446
4447 bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
4448 size = 4;
4449 break;
4450
4451 case ppc_stub_plt_branch:
4452 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
4453 stub_entry->root.string + 9,
4454 false, false);
4455 if (br_entry == NULL)
4456 {
4457 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
4458 stub_entry->root.string + 9);
4459 htab->stub_error = true;
4460 return false;
4461 }
4462
4463 off = (stub_entry->target_value
4464 + stub_entry->target_section->output_offset
4465 + stub_entry->target_section->output_section->vma);
4466
4467 bfd_put_64 (htab->sbrlt->owner, off,
4468 htab->sbrlt->contents + br_entry->offset);
4469
4470 if (info->shared)
4471 {
4472 /* Create a reloc for the branch lookup table entry. */
4473 Elf_Internal_Rela rela;
4474 bfd_byte *loc;
4475
4476 rela.r_offset = (br_entry->offset
4477 + htab->sbrlt->output_offset
4478 + htab->sbrlt->output_section->vma);
4479 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
4480 rela.r_addend = off;
4481
4482 loc = htab->srelbrlt->contents;
4483 loc += htab->srelbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
4484 bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, loc);
4485 }
4486
4487 off = (br_entry->offset
4488 + htab->sbrlt->output_offset
4489 + htab->sbrlt->output_section->vma
4490 - elf_gp (htab->sbrlt->output_section->owner)
4491 - TOC_BASE_OFF);
4492
4493 if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
4494 {
4495 (*_bfd_error_handler)
4496 (_("linkage table error against `%s'"),
4497 stub_entry->root.string);
4498 bfd_set_error (bfd_error_bad_value);
4499 htab->stub_error = true;
4500 return false;
4501 }
4502
4503 indx = off;
4504 bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
4505 bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4);
4506 bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8);
4507 bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12);
4508 size = 16;
4509 break;
4510
4511 case ppc_stub_plt_call:
4512 /* Do the best we can for shared libraries built without
4513 exporting ".foo" for each "foo". This can happen when symbol
4514 versioning scripts strip all bar a subset of symbols. */
4515 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
4516 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
4517 {
4518 /* Point the symbol at the stub. There may be multiple stubs,
4519 we don't really care; The main thing is to make this sym
4520 defined somewhere. */
4521 stub_entry->h->oh->root.type = bfd_link_hash_defined;
4522 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
4523 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
4524 }
4525
4526 /* Now build the stub. */
4527 off = stub_entry->h->elf.plt.offset;
4528 if (off >= (bfd_vma) -2)
4529 abort ();
4530
4531 off &= ~ (bfd_vma) 1;
4532 off += (htab->splt->output_offset
4533 + htab->splt->output_section->vma
4534 - elf_gp (htab->splt->output_section->owner)
4535 - TOC_BASE_OFF);
4536
4537 if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
4538 {
4539 (*_bfd_error_handler)
4540 (_("linkage table error against `%s'"),
4541 stub_entry->h->elf.root.root.string);
4542 bfd_set_error (bfd_error_bad_value);
4543 htab->stub_error = true;
4544 return false;
4545 }
4546
4547 p = build_plt_stub (stub_bfd, loc, (int) off, 0);
4548 size = p - loc;
4549 break;
4550
4551 default:
4552 BFD_FAIL ();
4553 return false;
4554 }
4555
4556 stub_sec->_cooked_size += size;
4557 return true;
4558 }
4559
4560 /* As above, but don't actually build the stub. Just bump offset so
4561 we know stub section sizes, and select plt_branch stubs where
4562 long_branch stubs won't do. */
4563
4564 static boolean
4565 ppc_size_one_stub (gen_entry, in_arg)
4566 struct bfd_hash_entry *gen_entry;
4567 PTR in_arg;
4568 {
4569 struct ppc_stub_hash_entry *stub_entry;
4570 struct ppc_link_hash_table *htab;
4571 bfd_vma off;
4572 int size;
4573
4574 /* Massage our args to the form they really have. */
4575 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
4576 htab = (struct ppc_link_hash_table *) in_arg;
4577
4578 if (stub_entry->stub_type == ppc_stub_plt_call)
4579 {
4580 off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1;
4581 off += (htab->splt->output_offset
4582 + htab->splt->output_section->vma
4583 - elf_gp (htab->splt->output_section->owner)
4584 - TOC_BASE_OFF);
4585
4586 size = 28;
4587 if (PPC_HA ((int) off + 16) != PPC_HA ((int) off))
4588 size += 4;
4589 }
4590 else
4591 {
4592 /* ppc_stub_long_branch or ppc_stub_plt_branch. */
4593 stub_entry->stub_type = ppc_stub_long_branch;
4594 size = 4;
4595
4596 off = (stub_entry->target_value
4597 + stub_entry->target_section->output_offset
4598 + stub_entry->target_section->output_section->vma);
4599 off -= (stub_entry->stub_sec->_raw_size
4600 + stub_entry->stub_sec->output_offset
4601 + stub_entry->stub_sec->output_section->vma);
4602
4603 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
4604 {
4605 struct ppc_branch_hash_entry *br_entry;
4606
4607 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
4608 stub_entry->root.string + 9,
4609 true, false);
4610 if (br_entry == NULL)
4611 {
4612 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
4613 stub_entry->root.string + 9);
4614 htab->stub_error = true;
4615 return false;
4616 }
4617
4618 if (br_entry->iter != htab->stub_iteration)
4619 {
4620 br_entry->iter = htab->stub_iteration;
4621 br_entry->offset = htab->sbrlt->_raw_size;
4622 htab->sbrlt->_raw_size += 8;
4623 }
4624 stub_entry->stub_type = ppc_stub_plt_branch;
4625 size = 16;
4626 }
4627 }
4628
4629 stub_entry->stub_sec->_raw_size += size;
4630 return true;
4631 }
4632
4633 /* Set up various things so that we can make a list of input sections
4634 for each output section included in the link. Returns -1 on error,
4635 0 when no stubs will be needed, and 1 on success. */
4636
4637 int
4638 ppc64_elf_setup_section_lists (output_bfd, info)
4639 bfd *output_bfd;
4640 struct bfd_link_info *info;
4641 {
4642 bfd *input_bfd;
4643 int top_id, top_index;
4644 asection *section;
4645 asection **input_list, **list;
4646 bfd_size_type amt;
4647 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4648
4649 if (htab->elf.root.creator->flavour != bfd_target_elf_flavour
4650 || htab->sbrlt == NULL)
4651 return 0;
4652
4653 /* Find the top input section id. */
4654 for (input_bfd = info->input_bfds, top_id = 0;
4655 input_bfd != NULL;
4656 input_bfd = input_bfd->link_next)
4657 {
4658 for (section = input_bfd->sections;
4659 section != NULL;
4660 section = section->next)
4661 {
4662 if (top_id < section->id)
4663 top_id = section->id;
4664 }
4665 }
4666
4667 amt = sizeof (struct map_stub) * (top_id + 1);
4668 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
4669 if (htab->stub_group == NULL)
4670 return -1;
4671
4672 /* We can't use output_bfd->section_count here to find the top output
4673 section index as some sections may have been removed, and
4674 _bfd_strip_section_from_output doesn't renumber the indices. */
4675 for (section = output_bfd->sections, top_index = 0;
4676 section != NULL;
4677 section = section->next)
4678 {
4679 if (top_index < section->index)
4680 top_index = section->index;
4681 }
4682
4683 htab->top_index = top_index;
4684 amt = sizeof (asection *) * (top_index + 1);
4685 input_list = (asection **) bfd_malloc (amt);
4686 htab->input_list = input_list;
4687 if (input_list == NULL)
4688 return -1;
4689
4690 /* For sections we aren't interested in, mark their entries with a
4691 value we can check later. */
4692 list = input_list + top_index;
4693 do
4694 *list = bfd_abs_section_ptr;
4695 while (list-- != input_list);
4696
4697 for (section = output_bfd->sections;
4698 section != NULL;
4699 section = section->next)
4700 {
4701 if ((section->flags & SEC_CODE) != 0)
4702 input_list[section->index] = NULL;
4703 }
4704
4705 return 1;
4706 }
4707
4708 /* The linker repeatedly calls this function for each input section,
4709 in the order that input sections are linked into output sections.
4710 Build lists of input sections to determine groupings between which
4711 we may insert linker stubs. */
4712
4713 void
4714 ppc64_elf_next_input_section (info, isec)
4715 struct bfd_link_info *info;
4716 asection *isec;
4717 {
4718 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4719
4720 if (isec->output_section->index <= htab->top_index)
4721 {
4722 asection **list = htab->input_list + isec->output_section->index;
4723 if (*list != bfd_abs_section_ptr)
4724 {
4725 /* Steal the link_sec pointer for our list. */
4726 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4727 /* This happens to make the list in reverse order,
4728 which is what we want. */
4729 PREV_SEC (isec) = *list;
4730 *list = isec;
4731 }
4732 }
4733 }
4734
4735 /* See whether we can group stub sections together. Grouping stub
4736 sections may result in fewer stubs. More importantly, we need to
4737 put all .init* and .fini* stubs at the beginning of the .init or
4738 .fini output sections respectively, because glibc splits the
4739 _init and _fini functions into multiple parts. Putting a stub in
4740 the middle of a function is not a good idea. */
4741
4742 static void
4743 group_sections (htab, stub_group_size, stubs_always_before_branch)
4744 struct ppc_link_hash_table *htab;
4745 bfd_size_type stub_group_size;
4746 boolean stubs_always_before_branch;
4747 {
4748 asection **list = htab->input_list + htab->top_index;
4749 do
4750 {
4751 asection *tail = *list;
4752 if (tail == bfd_abs_section_ptr)
4753 continue;
4754 while (tail != NULL)
4755 {
4756 asection *curr;
4757 asection *prev;
4758 bfd_size_type total;
4759
4760 curr = tail;
4761 if (tail->_cooked_size)
4762 total = tail->_cooked_size;
4763 else
4764 total = tail->_raw_size;
4765 while ((prev = PREV_SEC (curr)) != NULL
4766 && ((total += curr->output_offset - prev->output_offset)
4767 < stub_group_size))
4768 curr = prev;
4769
4770 /* OK, the size from the start of CURR to the end is less
4771 than stub_group_size and thus can be handled by one stub
4772 section. (or the tail section is itself larger than
4773 stub_group_size, in which case we may be toast.) We
4774 should really be keeping track of the total size of stubs
4775 added here, as stubs contribute to the final output
4776 section size. That's a little tricky, and this way will
4777 only break if stubs added make the total size more than
4778 2^25, ie. for the default stub_group_size, if stubs total
4779 more than 2834432 bytes, or over 100000 plt call stubs. */
4780 do
4781 {
4782 prev = PREV_SEC (tail);
4783 /* Set up this stub group. */
4784 htab->stub_group[tail->id].link_sec = curr;
4785 }
4786 while (tail != curr && (tail = prev) != NULL);
4787
4788 /* But wait, there's more! Input sections up to stub_group_size
4789 bytes before the stub section can be handled by it too. */
4790 if (!stubs_always_before_branch)
4791 {
4792 total = 0;
4793 while (prev != NULL
4794 && ((total += tail->output_offset - prev->output_offset)
4795 < stub_group_size))
4796 {
4797 tail = prev;
4798 prev = PREV_SEC (tail);
4799 htab->stub_group[tail->id].link_sec = curr;
4800 }
4801 }
4802 tail = prev;
4803 }
4804 }
4805 while (list-- != htab->input_list);
4806 free (htab->input_list);
4807 #undef PREV_SEC
4808 }
4809
4810 /* Determine and set the size of the stub section for a final link.
4811
4812 The basic idea here is to examine all the relocations looking for
4813 PC-relative calls to a target that is unreachable with a "bl"
4814 instruction. */
4815
4816 boolean
4817 ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size,
4818 add_stub_section, layout_sections_again)
4819 bfd *output_bfd;
4820 bfd *stub_bfd;
4821 struct bfd_link_info *info;
4822 bfd_signed_vma group_size;
4823 asection * (*add_stub_section) PARAMS ((const char *, asection *));
4824 void (*layout_sections_again) PARAMS ((void));
4825 {
4826 bfd_size_type stub_group_size;
4827 boolean stubs_always_before_branch;
4828 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4829
4830 /* Stash our params away. */
4831 htab->stub_bfd = stub_bfd;
4832 htab->add_stub_section = add_stub_section;
4833 htab->layout_sections_again = layout_sections_again;
4834 stubs_always_before_branch = group_size < 0;
4835 if (group_size < 0)
4836 stub_group_size = -group_size;
4837 else
4838 stub_group_size = group_size;
4839 if (stub_group_size == 1)
4840 {
4841 /* Default values. */
4842 stub_group_size = 30720000;
4843 if (htab->has_14bit_branch)
4844 stub_group_size = 30000;
4845 }
4846
4847 group_sections (htab, stub_group_size, stubs_always_before_branch);
4848
4849 while (1)
4850 {
4851 bfd *input_bfd;
4852 unsigned int bfd_indx;
4853 asection *stub_sec;
4854 boolean stub_changed;
4855
4856 htab->stub_iteration += 1;
4857 stub_changed = false;
4858
4859 for (input_bfd = info->input_bfds, bfd_indx = 0;
4860 input_bfd != NULL;
4861 input_bfd = input_bfd->link_next, bfd_indx++)
4862 {
4863 Elf_Internal_Shdr *symtab_hdr;
4864 asection *section;
4865 Elf_Internal_Sym *local_syms = NULL;
4866
4867 /* We'll need the symbol table in a second. */
4868 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4869 if (symtab_hdr->sh_info == 0)
4870 continue;
4871
4872 /* Walk over each section attached to the input bfd. */
4873 for (section = input_bfd->sections;
4874 section != NULL;
4875 section = section->next)
4876 {
4877 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4878
4879 /* If there aren't any relocs, then there's nothing more
4880 to do. */
4881 if ((section->flags & SEC_RELOC) == 0
4882 || section->reloc_count == 0)
4883 continue;
4884
4885 /* If this section is a link-once section that will be
4886 discarded, then don't create any stubs. */
4887 if (section->output_section == NULL
4888 || section->output_section->owner != output_bfd)
4889 continue;
4890
4891 /* Get the relocs. */
4892 internal_relocs
4893 = _bfd_elf64_link_read_relocs (input_bfd, section, NULL,
4894 (Elf_Internal_Rela *) NULL,
4895 info->keep_memory);
4896 if (internal_relocs == NULL)
4897 goto error_ret_free_local;
4898
4899 /* Now examine each relocation. */
4900 irela = internal_relocs;
4901 irelaend = irela + section->reloc_count;
4902 for (; irela < irelaend; irela++)
4903 {
4904 unsigned int r_type, r_indx;
4905 enum ppc_stub_type stub_type;
4906 struct ppc_stub_hash_entry *stub_entry;
4907 asection *sym_sec;
4908 bfd_vma sym_value;
4909 bfd_vma destination;
4910 struct ppc_link_hash_entry *hash;
4911 char *stub_name;
4912 const asection *id_sec;
4913
4914 r_type = ELF64_R_TYPE (irela->r_info);
4915 r_indx = ELF64_R_SYM (irela->r_info);
4916
4917 if (r_type >= (unsigned int) R_PPC_max)
4918 {
4919 bfd_set_error (bfd_error_bad_value);
4920 goto error_ret_free_internal;
4921 }
4922
4923 /* Only look for stubs on branch instructions. */
4924 if (r_type != (unsigned int) R_PPC64_REL24
4925 && r_type != (unsigned int) R_PPC64_REL14
4926 && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN
4927 && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN)
4928 continue;
4929
4930 /* Now determine the call target, its name, value,
4931 section. */
4932 sym_sec = NULL;
4933 sym_value = 0;
4934 destination = 0;
4935 hash = NULL;
4936 if (r_indx < symtab_hdr->sh_info)
4937 {
4938 /* It's a local symbol. */
4939 Elf_Internal_Sym *sym;
4940 Elf_Internal_Shdr *hdr;
4941
4942 if (local_syms == NULL)
4943 {
4944 local_syms
4945 = (Elf_Internal_Sym *) symtab_hdr->contents;
4946 if (local_syms == NULL)
4947 local_syms
4948 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
4949 symtab_hdr->sh_info, 0,
4950 NULL, NULL, NULL);
4951 if (local_syms == NULL)
4952 goto error_ret_free_internal;
4953 }
4954 sym = local_syms + r_indx;
4955 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
4956 sym_sec = hdr->bfd_section;
4957 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4958 sym_value = sym->st_value;
4959 destination = (sym_value + irela->r_addend
4960 + sym_sec->output_offset
4961 + sym_sec->output_section->vma);
4962 }
4963 else
4964 {
4965 /* It's an external symbol. */
4966 int e_indx;
4967
4968 e_indx = r_indx - symtab_hdr->sh_info;
4969 hash = ((struct ppc_link_hash_entry *)
4970 elf_sym_hashes (input_bfd)[e_indx]);
4971
4972 while (hash->elf.root.type == bfd_link_hash_indirect
4973 || hash->elf.root.type == bfd_link_hash_warning)
4974 hash = ((struct ppc_link_hash_entry *)
4975 hash->elf.root.u.i.link);
4976
4977 if (hash->elf.root.type == bfd_link_hash_defined
4978 || hash->elf.root.type == bfd_link_hash_defweak)
4979 {
4980 sym_sec = hash->elf.root.u.def.section;
4981 sym_value = hash->elf.root.u.def.value;
4982 if (sym_sec->output_section != NULL)
4983 destination = (sym_value + irela->r_addend
4984 + sym_sec->output_offset
4985 + sym_sec->output_section->vma);
4986 }
4987 else if (hash->elf.root.type == bfd_link_hash_undefweak)
4988 ;
4989 else if (hash->elf.root.type == bfd_link_hash_undefined)
4990 ;
4991 else
4992 {
4993 bfd_set_error (bfd_error_bad_value);
4994 goto error_ret_free_internal;
4995 }
4996 }
4997
4998 /* Determine what (if any) linker stub is needed. */
4999 stub_type = ppc_type_of_stub (section, irela, &hash,
5000 destination);
5001 if (stub_type == ppc_stub_none)
5002 continue;
5003
5004 /* Support for grouping stub sections. */
5005 id_sec = htab->stub_group[section->id].link_sec;
5006
5007 /* Get the name of this stub. */
5008 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
5009 if (!stub_name)
5010 goto error_ret_free_internal;
5011
5012 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
5013 stub_name, false, false);
5014 if (stub_entry != NULL)
5015 {
5016 /* The proper stub has already been created. */
5017 free (stub_name);
5018 continue;
5019 }
5020
5021 stub_entry = ppc_add_stub (stub_name, section, htab);
5022 if (stub_entry == NULL)
5023 {
5024 free (stub_name);
5025 error_ret_free_internal:
5026 if (elf_section_data (section)->relocs == NULL)
5027 free (internal_relocs);
5028 error_ret_free_local:
5029 if (local_syms != NULL
5030 && (symtab_hdr->contents
5031 != (unsigned char *) local_syms))
5032 free (local_syms);
5033 return false;
5034 }
5035
5036 stub_entry->target_value = sym_value;
5037 stub_entry->target_section = sym_sec;
5038 stub_entry->stub_type = stub_type;
5039 stub_entry->h = hash;
5040 stub_changed = true;
5041 }
5042
5043 /* We're done with the internal relocs, free them. */
5044 if (elf_section_data (section)->relocs != internal_relocs)
5045 free (internal_relocs);
5046 }
5047
5048 if (local_syms != NULL
5049 && symtab_hdr->contents != (unsigned char *) local_syms)
5050 {
5051 if (!info->keep_memory)
5052 free (local_syms);
5053 else
5054 symtab_hdr->contents = (unsigned char *) local_syms;
5055 }
5056 }
5057
5058 if (!stub_changed)
5059 break;
5060
5061 /* OK, we've added some stubs. Find out the new size of the
5062 stub sections. */
5063 for (stub_sec = htab->stub_bfd->sections;
5064 stub_sec != NULL;
5065 stub_sec = stub_sec->next)
5066 {
5067 stub_sec->_raw_size = 0;
5068 stub_sec->_cooked_size = 0;
5069 }
5070 htab->sbrlt->_raw_size = 0;
5071 htab->sbrlt->_cooked_size = 0;
5072
5073 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
5074
5075 /* Ask the linker to do its stuff. */
5076 (*htab->layout_sections_again) ();
5077 }
5078
5079 /* It would be nice to strip .branch_lt from the output if the
5080 section is empty, but it's too late. If we strip sections here,
5081 the dynamic symbol table is corrupted since the section symbol
5082 for the stripped section isn't written. */
5083
5084 return true;
5085 }
5086
5087 /* Called after we have determined section placement. If sections
5088 move, we'll be called again. Provide a value for TOCstart. */
5089
5090 bfd_vma
5091 ppc64_elf_toc (obfd)
5092 bfd *obfd;
5093 {
5094 asection *s;
5095 bfd_vma TOCstart;
5096
5097 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
5098 order. The TOC starts where the first of these sections starts. */
5099 s = bfd_get_section_by_name (obfd, ".got");
5100 if (s == NULL)
5101 s = bfd_get_section_by_name (obfd, ".toc");
5102 if (s == NULL)
5103 s = bfd_get_section_by_name (obfd, ".tocbss");
5104 if (s == NULL)
5105 s = bfd_get_section_by_name (obfd, ".plt");
5106 if (s == NULL)
5107 {
5108 /* This may happen for
5109 o references to TOC base (SYM@toc / TOC[tc0]) without a
5110 .toc directive
5111 o bad linker script
5112 o --gc-sections and empty TOC sections
5113
5114 FIXME: Warn user? */
5115
5116 /* Look for a likely section. We probably won't even be
5117 using TOCstart. */
5118 for (s = obfd->sections; s != NULL; s = s->next)
5119 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
5120 == (SEC_ALLOC | SEC_SMALL_DATA))
5121 break;
5122 if (s == NULL)
5123 for (s = obfd->sections; s != NULL; s = s->next)
5124 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
5125 == (SEC_ALLOC | SEC_SMALL_DATA))
5126 break;
5127 if (s == NULL)
5128 for (s = obfd->sections; s != NULL; s = s->next)
5129 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
5130 break;
5131 if (s == NULL)
5132 for (s = obfd->sections; s != NULL; s = s->next)
5133 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
5134 break;
5135 }
5136
5137 TOCstart = 0;
5138 if (s != NULL)
5139 TOCstart = s->output_section->vma + s->output_offset;
5140
5141 return TOCstart;
5142 }
5143
5144 /* Build all the stubs associated with the current output file.
5145 The stubs are kept in a hash table attached to the main linker
5146 hash table. This function is called via gldelf64ppc_finish. */
5147
5148 boolean
5149 ppc64_elf_build_stubs (info)
5150 struct bfd_link_info *info;
5151 {
5152 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5153 asection *stub_sec;
5154 bfd_vma plt_r2;
5155 bfd_byte *p;
5156
5157 for (stub_sec = htab->stub_bfd->sections;
5158 stub_sec != NULL;
5159 stub_sec = stub_sec->next)
5160 {
5161 bfd_size_type size;
5162
5163 /* Allocate memory to hold the linker stubs. */
5164 size = stub_sec->_raw_size;
5165 if (size != 0)
5166 {
5167 stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
5168 if (stub_sec->contents == NULL)
5169 return false;
5170 }
5171 stub_sec->_cooked_size = 0;
5172 }
5173
5174 if (htab->splt != NULL)
5175 {
5176 unsigned int indx;
5177
5178 /* Build the .glink plt call stub. */
5179 plt_r2 = (htab->splt->output_offset
5180 + htab->splt->output_section->vma
5181 - elf_gp (htab->splt->output_section->owner)
5182 - TOC_BASE_OFF);
5183 p = htab->sglink->contents;
5184 p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1);
5185 while (p < htab->sglink->contents + GLINK_CALL_STUB_SIZE)
5186 {
5187 bfd_put_32 (htab->sglink->owner, NOP, p);
5188 p += 4;
5189 }
5190
5191 /* Build the .glink lazy link call stubs. */
5192 indx = 0;
5193 while (p < htab->sglink->contents + htab->sglink->_raw_size)
5194 {
5195 if (indx < 0x8000)
5196 {
5197 bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p);
5198 p += 4;
5199 }
5200 else
5201 {
5202 bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p);
5203 p += 4;
5204 bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
5205 p += 4;
5206 }
5207 bfd_put_32 (htab->sglink->owner,
5208 B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p);
5209 indx++;
5210 p += 4;
5211 }
5212 htab->sglink->_cooked_size = p - htab->sglink->contents;
5213 }
5214
5215 if (htab->sbrlt->_raw_size != 0)
5216 {
5217 htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
5218 htab->sbrlt->_raw_size);
5219 if (htab->sbrlt->contents == NULL)
5220 return false;
5221 }
5222
5223 /* Build the stubs as directed by the stub hash table. */
5224 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
5225
5226 for (stub_sec = htab->stub_bfd->sections;
5227 stub_sec != NULL;
5228 stub_sec = stub_sec->next)
5229 {
5230 if (stub_sec->_raw_size != stub_sec->_cooked_size)
5231 break;
5232 }
5233
5234 if (stub_sec != NULL
5235 || htab->sglink->_raw_size != htab->sglink->_cooked_size)
5236 {
5237 htab->stub_error = true;
5238 (*_bfd_error_handler) (_("stubs don't match calculated size"));
5239 }
5240
5241 return !htab->stub_error;
5242 }
5243
5244 /* The RELOCATE_SECTION function is called by the ELF backend linker
5245 to handle the relocations for a section.
5246
5247 The relocs are always passed as Rela structures; if the section
5248 actually uses Rel structures, the r_addend field will always be
5249 zero.
5250
5251 This function is responsible for adjust the section contents as
5252 necessary, and (if using Rela relocs and generating a
5253 relocateable output file) adjusting the reloc addend as
5254 necessary.
5255
5256 This function does not have to worry about setting the reloc
5257 address or the reloc symbol index.
5258
5259 LOCAL_SYMS is a pointer to the swapped in local symbols.
5260
5261 LOCAL_SECTIONS is an array giving the section in the input file
5262 corresponding to the st_shndx field of each local symbol.
5263
5264 The global hash table entry for the global symbols can be found
5265 via elf_sym_hashes (input_bfd).
5266
5267 When generating relocateable output, this function must handle
5268 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5269 going to be the section symbol corresponding to the output
5270 section, which means that the addend must be adjusted
5271 accordingly. */
5272
5273 static boolean
5274 ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
5275 contents, relocs, local_syms, local_sections)
5276 bfd *output_bfd;
5277 struct bfd_link_info *info;
5278 bfd *input_bfd;
5279 asection *input_section;
5280 bfd_byte *contents;
5281 Elf_Internal_Rela *relocs;
5282 Elf_Internal_Sym *local_syms;
5283 asection **local_sections;
5284 {
5285 struct ppc_link_hash_table *htab;
5286 Elf_Internal_Shdr *symtab_hdr;
5287 struct elf_link_hash_entry **sym_hashes;
5288 Elf_Internal_Rela *rel;
5289 Elf_Internal_Rela *relend;
5290 bfd_vma *local_got_offsets;
5291 bfd_vma TOCstart;
5292 boolean ret = true;
5293 boolean is_opd;
5294 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
5295 boolean is_power4 = false;
5296
5297 if (info->relocateable)
5298 return true;
5299
5300 /* Initialize howto table if needed. */
5301 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5302 ppc_howto_init ();
5303
5304 htab = ppc_hash_table (info);
5305 local_got_offsets = elf_local_got_offsets (input_bfd);
5306 TOCstart = elf_gp (output_bfd);
5307 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5308 sym_hashes = elf_sym_hashes (input_bfd);
5309 is_opd = elf_section_data (input_section)->tdata != NULL;
5310
5311 rel = relocs;
5312 relend = relocs + input_section->reloc_count;
5313 for (; rel < relend; rel++)
5314 {
5315 enum elf_ppc_reloc_type r_type;
5316 bfd_vma offset;
5317 bfd_vma addend;
5318 bfd_reloc_status_type r;
5319 Elf_Internal_Sym *sym;
5320 asection *sec;
5321 struct elf_link_hash_entry *h;
5322 struct elf_link_hash_entry *fdh;
5323 const char *sym_name;
5324 unsigned long r_symndx;
5325 bfd_vma relocation;
5326 boolean unresolved_reloc;
5327 boolean warned;
5328 long insn;
5329 struct ppc_stub_hash_entry *stub_entry;
5330 bfd_vma max_br_offset;
5331 bfd_vma from;
5332
5333 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
5334 r_symndx = ELF64_R_SYM (rel->r_info);
5335 offset = rel->r_offset;
5336 addend = rel->r_addend;
5337 r = bfd_reloc_other;
5338 sym = (Elf_Internal_Sym *) 0;
5339 sec = (asection *) 0;
5340 h = (struct elf_link_hash_entry *) 0;
5341 sym_name = (const char *) 0;
5342 unresolved_reloc = false;
5343 warned = false;
5344
5345 if (r_type == R_PPC64_TOC)
5346 {
5347 /* Relocation value is TOC base. Symbol is ignored. */
5348 relocation = TOCstart + TOC_BASE_OFF;
5349 }
5350 else if (r_symndx < symtab_hdr->sh_info)
5351 {
5352 /* It's a local symbol. */
5353 sym = local_syms + r_symndx;
5354 sec = local_sections[r_symndx];
5355 sym_name = "<local symbol>";
5356
5357 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
5358 /* rel may have changed, update our copy of addend. */
5359 addend = rel->r_addend;
5360
5361 if (elf_section_data (sec) != NULL)
5362 {
5363 long *opd_sym_adjust;
5364
5365 opd_sym_adjust = (long *) elf_section_data (sec)->tdata;
5366 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
5367 relocation += opd_sym_adjust[sym->st_value / 24];
5368 }
5369 }
5370 else
5371 {
5372 /* It's a global symbol. */
5373 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5374 while (h->root.type == bfd_link_hash_indirect
5375 || h->root.type == bfd_link_hash_warning)
5376 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5377 sym_name = h->root.root.string;
5378 relocation = 0;
5379 if (h->root.type == bfd_link_hash_defined
5380 || h->root.type == bfd_link_hash_defweak)
5381 {
5382 sec = h->root.u.def.section;
5383 if (sec->output_section == NULL)
5384 /* Set a flag that will be cleared later if we find a
5385 relocation value for this symbol. output_section
5386 is typically NULL for symbols satisfied by a shared
5387 library. */
5388 unresolved_reloc = true;
5389 else
5390 relocation = (h->root.u.def.value
5391 + sec->output_section->vma
5392 + sec->output_offset);
5393 }
5394 else if (h->root.type == bfd_link_hash_undefweak)
5395 ;
5396 else if (info->shared
5397 && (!info->symbolic || info->allow_shlib_undefined)
5398 && !info->no_undefined
5399 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5400 ;
5401 else
5402 {
5403 if (! ((*info->callbacks->undefined_symbol)
5404 (info, h->root.root.string, input_bfd, input_section,
5405 offset, (!info->shared
5406 || info->no_undefined
5407 || ELF_ST_VISIBILITY (h->other)))))
5408 return false;
5409 warned = true;
5410 }
5411 }
5412
5413 /* First handle relocations that tweak non-addend part of insn. */
5414 insn = 0;
5415 switch (r_type)
5416 {
5417 default:
5418 break;
5419
5420 /* Branch taken prediction relocations. */
5421 case R_PPC64_ADDR14_BRTAKEN:
5422 case R_PPC64_REL14_BRTAKEN:
5423 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
5424 /* Fall thru. */
5425
5426 /* Branch not taken prediction relocations. */
5427 case R_PPC64_ADDR14_BRNTAKEN:
5428 case R_PPC64_REL14_BRNTAKEN:
5429 insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21);
5430 if (is_power4)
5431 {
5432 /* Set 'a' bit. This is 0b00010 in BO field for branch
5433 on CR(BI) insns (BO == 001at or 011at), and 0b01000
5434 for branch on CTR insns (BO == 1a00t or 1a01t). */
5435 if ((insn & (0x14 << 21)) == (0x04 << 21))
5436 insn |= 0x02 << 21;
5437 else if ((insn & (0x14 << 21)) == (0x10 << 21))
5438 insn |= 0x08 << 21;
5439 else
5440 break;
5441 }
5442 else
5443 {
5444 from = (offset
5445 + input_section->output_offset
5446 + input_section->output_section->vma);
5447
5448 /* Invert 'y' bit if not the default. */
5449 if ((bfd_signed_vma) (relocation + addend - from) < 0)
5450 insn ^= 0x01 << 21;
5451 }
5452
5453 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
5454 break;
5455
5456 case R_PPC64_REL24:
5457 /* A REL24 branching to a linkage function is followed by a
5458 nop. We replace the nop with a ld in order to restore
5459 the TOC base pointer. Only calls to shared objects need
5460 to alter the TOC base. These are recognized by their
5461 need for a PLT entry. */
5462 if (h != NULL
5463 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
5464 && fdh->plt.offset != (bfd_vma) -1
5465 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
5466 rel, htab)) != NULL)
5467 {
5468 boolean can_plt_call = 0;
5469
5470 if (offset + 8 <= input_section->_cooked_size)
5471 {
5472 insn = bfd_get_32 (input_bfd, contents + offset + 4);
5473 if (insn == NOP
5474 || insn == CROR_151515 || insn == CROR_313131)
5475 {
5476 bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1,
5477 contents + offset + 4);
5478 can_plt_call = 1;
5479 }
5480 }
5481
5482 if (!can_plt_call)
5483 {
5484 /* If this is a plain branch rather than a branch
5485 and link, don't require a nop. */
5486 insn = bfd_get_32 (input_bfd, contents + offset);
5487 if ((insn & 1) == 0)
5488 can_plt_call = 1;
5489 }
5490
5491 if (can_plt_call)
5492 {
5493 relocation = (stub_entry->stub_offset
5494 + stub_entry->stub_sec->output_offset
5495 + stub_entry->stub_sec->output_section->vma);
5496 addend = 0;
5497 unresolved_reloc = false;
5498 }
5499 }
5500
5501 if (h != NULL
5502 && h->root.type == bfd_link_hash_undefweak
5503 && relocation == 0
5504 && addend == 0)
5505 {
5506 /* Tweak calls to undefined weak functions to point at a
5507 blr. We can thus call a weak function without first
5508 checking whether the function is defined. We have a
5509 blr at the end of .sfpr. */
5510 BFD_ASSERT (htab->sfpr->_raw_size != 0);
5511 relocation = (htab->sfpr->_raw_size - 4
5512 + htab->sfpr->output_offset
5513 + htab->sfpr->output_section->vma);
5514 from = (offset
5515 + input_section->output_offset
5516 + input_section->output_section->vma);
5517
5518 /* But let's not be silly about it. If the blr isn't in
5519 reach, just go to the next instruction. */
5520 if (relocation - from + (1 << 25) >= (1 << 26)
5521 || htab->sfpr->_raw_size == 0)
5522 relocation = from + 4;
5523 }
5524 break;
5525 }
5526
5527 /* Set `addend'. */
5528 switch (r_type)
5529 {
5530 default:
5531 (*_bfd_error_handler)
5532 (_("%s: unknown relocation type %d for symbol %s"),
5533 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
5534
5535 bfd_set_error (bfd_error_bad_value);
5536 ret = false;
5537 continue;
5538
5539 case R_PPC64_NONE:
5540 case R_PPC_GNU_VTINHERIT:
5541 case R_PPC_GNU_VTENTRY:
5542 continue;
5543
5544 /* GOT16 relocations. Like an ADDR16 using the symbol's
5545 address in the GOT as relocation value instead of the
5546 symbols value itself. Also, create a GOT entry for the
5547 symbol and put the symbol value there. */
5548 case R_PPC64_GOT16:
5549 case R_PPC64_GOT16_LO:
5550 case R_PPC64_GOT16_HI:
5551 case R_PPC64_GOT16_HA:
5552 case R_PPC64_GOT16_DS:
5553 case R_PPC64_GOT16_LO_DS:
5554 {
5555 /* Relocation is to the entry for this symbol in the global
5556 offset table. */
5557 bfd_vma off;
5558
5559 if (htab->sgot == NULL)
5560 abort ();
5561
5562 if (h != NULL)
5563 {
5564 boolean dyn;
5565
5566 off = h->got.offset;
5567 dyn = htab->elf.dynamic_sections_created;
5568 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
5569 || (info->shared
5570 && (info->symbolic
5571 || h->dynindx == -1
5572 || (h->elf_link_hash_flags
5573 & ELF_LINK_FORCED_LOCAL))
5574 && (h->elf_link_hash_flags
5575 & ELF_LINK_HASH_DEF_REGULAR)))
5576 {
5577 /* This is actually a static link, or it is a
5578 -Bsymbolic link and the symbol is defined
5579 locally, or the symbol was forced to be local
5580 because of a version file. We must initialize
5581 this entry in the global offset table. Since the
5582 offset must always be a multiple of 8, we use the
5583 least significant bit to record whether we have
5584 initialized it already.
5585
5586 When doing a dynamic link, we create a .rel.got
5587 relocation entry to initialize the value. This
5588 is done in the finish_dynamic_symbol routine. */
5589 if ((off & 1) != 0)
5590 off &= ~1;
5591 else
5592 {
5593 bfd_put_64 (output_bfd, relocation,
5594 htab->sgot->contents + off);
5595 h->got.offset |= 1;
5596 }
5597 }
5598 else
5599 unresolved_reloc = false;
5600 }
5601 else
5602 {
5603 if (local_got_offsets == NULL)
5604 abort ();
5605
5606 off = local_got_offsets[r_symndx];
5607
5608 /* The offset must always be a multiple of 8. We use
5609 the least significant bit to record whether we have
5610 already processed this entry. */
5611 if ((off & 1) != 0)
5612 off &= ~1;
5613 else
5614 {
5615 bfd_put_64 (output_bfd, relocation,
5616 htab->sgot->contents + off);
5617
5618 if (info->shared)
5619 {
5620 Elf_Internal_Rela outrel;
5621 bfd_byte *loc;
5622
5623 /* We need to generate a R_PPC64_RELATIVE reloc
5624 for the dynamic linker. */
5625 outrel.r_offset = (htab->sgot->output_section->vma
5626 + htab->sgot->output_offset
5627 + off);
5628 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
5629 outrel.r_addend = relocation;
5630 loc = htab->srelgot->contents;
5631 loc += (htab->srelgot->reloc_count++
5632 * sizeof (Elf64_External_Rela));
5633 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
5634 }
5635
5636 local_got_offsets[r_symndx] |= 1;
5637 }
5638 }
5639
5640 if (off >= (bfd_vma) -2)
5641 abort ();
5642
5643 relocation = htab->sgot->output_offset + off;
5644
5645 /* TOC base (r2) is TOC start plus 0x8000. */
5646 addend -= TOC_BASE_OFF;
5647 }
5648 break;
5649
5650 case R_PPC64_PLT16_HA:
5651 case R_PPC64_PLT16_HI:
5652 case R_PPC64_PLT16_LO:
5653 case R_PPC64_PLT32:
5654 case R_PPC64_PLT64:
5655 /* Relocation is to the entry for this symbol in the
5656 procedure linkage table. */
5657
5658 /* Resolve a PLT reloc against a local symbol directly,
5659 without using the procedure linkage table. */
5660 if (h == NULL)
5661 break;
5662
5663 if (h->plt.offset == (bfd_vma) -1
5664 || htab->splt == NULL)
5665 {
5666 /* We didn't make a PLT entry for this symbol. This
5667 happens when statically linking PIC code, or when
5668 using -Bsymbolic. */
5669 break;
5670 }
5671
5672 relocation = (htab->splt->output_section->vma
5673 + htab->splt->output_offset
5674 + h->plt.offset);
5675 unresolved_reloc = false;
5676 break;
5677
5678 /* TOC16 relocs. We want the offset relative to the TOC base,
5679 which is the address of the start of the TOC plus 0x8000.
5680 The TOC consists of sections .got, .toc, .tocbss, and .plt,
5681 in this order. */
5682 case R_PPC64_TOC16:
5683 case R_PPC64_TOC16_LO:
5684 case R_PPC64_TOC16_HI:
5685 case R_PPC64_TOC16_DS:
5686 case R_PPC64_TOC16_LO_DS:
5687 case R_PPC64_TOC16_HA:
5688 addend -= TOCstart + TOC_BASE_OFF;
5689 break;
5690
5691 /* Relocate against the beginning of the section. */
5692 case R_PPC64_SECTOFF:
5693 case R_PPC64_SECTOFF_LO:
5694 case R_PPC64_SECTOFF_HI:
5695 case R_PPC64_SECTOFF_DS:
5696 case R_PPC64_SECTOFF_LO_DS:
5697 case R_PPC64_SECTOFF_HA:
5698 if (sec != (asection *) 0)
5699 addend -= sec->output_section->vma;
5700 break;
5701
5702 case R_PPC64_REL14:
5703 case R_PPC64_REL14_BRNTAKEN:
5704 case R_PPC64_REL14_BRTAKEN:
5705 case R_PPC64_REL24:
5706 break;
5707
5708 /* Relocations that may need to be propagated if this is a
5709 dynamic object. */
5710 case R_PPC64_REL32:
5711 case R_PPC64_REL64:
5712 case R_PPC64_ADDR14:
5713 case R_PPC64_ADDR14_BRNTAKEN:
5714 case R_PPC64_ADDR14_BRTAKEN:
5715 case R_PPC64_ADDR16:
5716 case R_PPC64_ADDR16_DS:
5717 case R_PPC64_ADDR16_HA:
5718 case R_PPC64_ADDR16_HI:
5719 case R_PPC64_ADDR16_HIGHER:
5720 case R_PPC64_ADDR16_HIGHERA:
5721 case R_PPC64_ADDR16_HIGHEST:
5722 case R_PPC64_ADDR16_HIGHESTA:
5723 case R_PPC64_ADDR16_LO:
5724 case R_PPC64_ADDR16_LO_DS:
5725 case R_PPC64_ADDR24:
5726 case R_PPC64_ADDR30:
5727 case R_PPC64_ADDR32:
5728 case R_PPC64_ADDR64:
5729 case R_PPC64_UADDR16:
5730 case R_PPC64_UADDR32:
5731 case R_PPC64_UADDR64:
5732 /* r_symndx will be zero only for relocs against symbols
5733 from removed linkonce sections, or sections discarded by
5734 a linker script. */
5735 if (r_symndx == 0)
5736 break;
5737 /* Fall thru. */
5738
5739 case R_PPC64_TOC:
5740 if ((input_section->flags & SEC_ALLOC) == 0)
5741 break;
5742
5743 if (NO_OPD_RELOCS && is_opd)
5744 break;
5745
5746 if ((info->shared
5747 && (IS_ABSOLUTE_RELOC (r_type)
5748 || (h != NULL
5749 && h->dynindx != -1
5750 && (! info->symbolic
5751 || (h->elf_link_hash_flags
5752 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
5753 || (!info->shared
5754 && h != NULL
5755 && h->dynindx != -1
5756 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5757 && (((h->elf_link_hash_flags
5758 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5759 && (h->elf_link_hash_flags
5760 & ELF_LINK_HASH_DEF_REGULAR) == 0)
5761 || h->root.type == bfd_link_hash_undefweak
5762 || h->root.type == bfd_link_hash_undefined)))
5763 {
5764 Elf_Internal_Rela outrel;
5765 boolean skip, relocate;
5766 asection *sreloc;
5767 bfd_byte *loc;
5768
5769 /* When generating a dynamic object, these relocations
5770 are copied into the output file to be resolved at run
5771 time. */
5772
5773 skip = false;
5774 relocate = false;
5775
5776 outrel.r_offset =
5777 _bfd_elf_section_offset (output_bfd, info, input_section,
5778 rel->r_offset);
5779 if (outrel.r_offset == (bfd_vma) -1)
5780 skip = true;
5781 else if (outrel.r_offset == (bfd_vma) -2)
5782 skip = true, relocate = true;
5783 outrel.r_offset += (input_section->output_section->vma
5784 + input_section->output_offset);
5785 outrel.r_addend = addend;
5786
5787 if (skip)
5788 memset (&outrel, 0, sizeof outrel);
5789 else if (h != NULL
5790 && h->dynindx != -1
5791 && !is_opd
5792 && (!IS_ABSOLUTE_RELOC (r_type)
5793 || !info->shared
5794 || !info->symbolic
5795 || (h->elf_link_hash_flags
5796 & ELF_LINK_HASH_DEF_REGULAR) == 0))
5797 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
5798 else
5799 {
5800 /* This symbol is local, or marked to become local,
5801 or this is an opd section reloc which must point
5802 at a local function. */
5803 outrel.r_addend += relocation;
5804 relocate = true;
5805 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
5806 {
5807 if (is_opd && h != NULL)
5808 {
5809 /* Lie about opd entries. This case occurs
5810 when building shared libraries and we
5811 reference a function in another shared
5812 lib. The same thing happens for a weak
5813 definition in an application that's
5814 overridden by a strong definition in a
5815 shared lib. (I believe this is a generic
5816 bug in binutils handling of weak syms.)
5817 In these cases we won't use the opd
5818 entry in this lib. */
5819 unresolved_reloc = false;
5820 }
5821 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
5822 }
5823 else
5824 {
5825 long indx = 0;
5826
5827 if (bfd_is_abs_section (sec))
5828 ;
5829 else if (sec == NULL || sec->owner == NULL)
5830 {
5831 bfd_set_error (bfd_error_bad_value);
5832 return false;
5833 }
5834 else
5835 {
5836 asection *osec;
5837
5838 osec = sec->output_section;
5839 indx = elf_section_data (osec)->dynindx;
5840
5841 /* We are turning this relocation into one
5842 against a section symbol, so subtract out
5843 the output section's address but not the
5844 offset of the input section in the output
5845 section. */
5846 outrel.r_addend -= osec->vma;
5847 }
5848
5849 outrel.r_info = ELF64_R_INFO (indx, r_type);
5850 }
5851 }
5852
5853 sreloc = elf_section_data (input_section)->sreloc;
5854 if (sreloc == NULL)
5855 abort ();
5856
5857 loc = sreloc->contents;
5858 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
5859 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
5860
5861 /* If this reloc is against an external symbol, it will
5862 be computed at runtime, so there's no need to do
5863 anything now. */
5864 if (! relocate)
5865 continue;
5866 }
5867 break;
5868
5869 case R_PPC64_COPY:
5870 case R_PPC64_GLOB_DAT:
5871 case R_PPC64_JMP_SLOT:
5872 case R_PPC64_RELATIVE:
5873 /* We shouldn't ever see these dynamic relocs in relocatable
5874 files. */
5875 /* Fall thru */
5876
5877 case R_PPC64_PLTGOT16:
5878 case R_PPC64_PLTGOT16_DS:
5879 case R_PPC64_PLTGOT16_HA:
5880 case R_PPC64_PLTGOT16_HI:
5881 case R_PPC64_PLTGOT16_LO:
5882 case R_PPC64_PLTGOT16_LO_DS:
5883 case R_PPC64_PLTREL32:
5884 case R_PPC64_PLTREL64:
5885 /* These ones haven't been implemented yet. */
5886
5887 (*_bfd_error_handler)
5888 (_("%s: Relocation %s is not supported for symbol %s."),
5889 bfd_archive_filename (input_bfd),
5890 ppc64_elf_howto_table[(int) r_type]->name, sym_name);
5891
5892 bfd_set_error (bfd_error_invalid_operation);
5893 ret = false;
5894 continue;
5895 }
5896
5897 /* Do any further special processing. */
5898 switch (r_type)
5899 {
5900 default:
5901 break;
5902
5903 case R_PPC64_ADDR16_HA:
5904 case R_PPC64_ADDR16_HIGHERA:
5905 case R_PPC64_ADDR16_HIGHESTA:
5906 case R_PPC64_PLT16_HA:
5907 case R_PPC64_TOC16_HA:
5908 case R_PPC64_SECTOFF_HA:
5909 /* It's just possible that this symbol is a weak symbol
5910 that's not actually defined anywhere. In that case,
5911 'sec' would be NULL, and we should leave the symbol
5912 alone (it will be set to zero elsewhere in the link). */
5913 if (sec != NULL)
5914 /* Add 0x10000 if sign bit in 0:15 is set. */
5915 addend += ((relocation + addend) & 0x8000) << 1;
5916 break;
5917
5918 case R_PPC64_ADDR16_DS:
5919 case R_PPC64_ADDR16_LO_DS:
5920 case R_PPC64_GOT16_DS:
5921 case R_PPC64_GOT16_LO_DS:
5922 case R_PPC64_PLT16_LO_DS:
5923 case R_PPC64_SECTOFF_DS:
5924 case R_PPC64_SECTOFF_LO_DS:
5925 case R_PPC64_TOC16_DS:
5926 case R_PPC64_TOC16_LO_DS:
5927 case R_PPC64_PLTGOT16_DS:
5928 case R_PPC64_PLTGOT16_LO_DS:
5929 if (((relocation + addend) & 3) != 0)
5930 {
5931 (*_bfd_error_handler)
5932 (_("%s: error: relocation %s not a multiple of 4"),
5933 bfd_archive_filename (input_bfd),
5934 ppc64_elf_howto_table[(int) r_type]->name);
5935 bfd_set_error (bfd_error_bad_value);
5936 ret = false;
5937 continue;
5938 }
5939 break;
5940
5941 case R_PPC64_REL14:
5942 case R_PPC64_REL14_BRNTAKEN:
5943 case R_PPC64_REL14_BRTAKEN:
5944 max_br_offset = 1 << 15;
5945 goto branch_check;
5946
5947 case R_PPC64_REL24:
5948 max_br_offset = 1 << 25;
5949
5950 branch_check:
5951 /* If the branch is out of reach, then redirect the
5952 call to the local stub for this function. */
5953 from = (offset
5954 + input_section->output_offset
5955 + input_section->output_section->vma);
5956 if (relocation + addend - from + max_br_offset >= 2 * max_br_offset
5957 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
5958 rel, htab)) != NULL)
5959 {
5960 /* Munge up the value and addend so that we call the stub
5961 rather than the procedure directly. */
5962 relocation = (stub_entry->stub_offset
5963 + stub_entry->stub_sec->output_offset
5964 + stub_entry->stub_sec->output_section->vma);
5965 addend = 0;
5966 }
5967 break;
5968 }
5969
5970 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5971 because such sections are not SEC_ALLOC and thus ld.so will
5972 not process them. */
5973 if (unresolved_reloc
5974 && !((input_section->flags & SEC_DEBUGGING) != 0
5975 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5976 {
5977 (*_bfd_error_handler)
5978 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
5979 bfd_archive_filename (input_bfd),
5980 bfd_get_section_name (input_bfd, input_section),
5981 (long) rel->r_offset,
5982 h->root.root.string);
5983 ret = false;
5984 }
5985
5986 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
5987 input_bfd,
5988 input_section,
5989 contents,
5990 offset,
5991 relocation,
5992 addend);
5993
5994 if (r != bfd_reloc_ok)
5995 {
5996 const char *name;
5997
5998 if (h != NULL)
5999 {
6000 if (h->root.type == bfd_link_hash_undefweak
6001 && ppc64_elf_howto_table[(int) r_type]->pc_relative)
6002 {
6003 /* Assume this is a call protected by other code that
6004 detects the symbol is undefined. If this is the case,
6005 we can safely ignore the overflow. If not, the
6006 program is hosed anyway, and a little warning isn't
6007 going to help. */
6008
6009 continue;
6010 }
6011
6012 name = h->root.root.string;
6013 }
6014 else
6015 {
6016 name = bfd_elf_string_from_elf_section (input_bfd,
6017 symtab_hdr->sh_link,
6018 sym->st_name);
6019 if (name == NULL)
6020 continue;
6021 if (*name == '\0')
6022 name = bfd_section_name (input_bfd, sec);
6023 }
6024
6025 if (r == bfd_reloc_overflow)
6026 {
6027 if (warned)
6028 continue;
6029 if (!((*info->callbacks->reloc_overflow)
6030 (info, name, ppc64_elf_howto_table[(int) r_type]->name,
6031 rel->r_addend, input_bfd, input_section, offset)))
6032 return false;
6033 }
6034 else
6035 {
6036 (*_bfd_error_handler)
6037 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
6038 bfd_archive_filename (input_bfd),
6039 bfd_get_section_name (input_bfd, input_section),
6040 (long) rel->r_offset, name, (int) r);
6041 ret = false;
6042 }
6043 }
6044 }
6045
6046 return ret;
6047 }
6048
6049 /* Finish up dynamic symbol handling. We set the contents of various
6050 dynamic sections here. */
6051
6052 static boolean
6053 ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
6054 bfd *output_bfd;
6055 struct bfd_link_info *info;
6056 struct elf_link_hash_entry *h;
6057 Elf_Internal_Sym *sym;
6058 {
6059 struct ppc_link_hash_table *htab;
6060 bfd *dynobj;
6061
6062 htab = ppc_hash_table (info);
6063 dynobj = htab->elf.dynobj;
6064
6065 if (h->plt.offset != (bfd_vma) -1
6066 && ((struct ppc_link_hash_entry *) h)->is_func_descriptor)
6067 {
6068 Elf_Internal_Rela rela;
6069 bfd_byte *loc;
6070
6071 /* This symbol has an entry in the procedure linkage table. Set
6072 it up. */
6073
6074 if (htab->splt == NULL
6075 || htab->srelplt == NULL
6076 || htab->sglink == NULL)
6077 abort ();
6078
6079 /* Create a JMP_SLOT reloc to inform the dynamic linker to
6080 fill in the PLT entry. */
6081
6082 rela.r_offset = (htab->splt->output_section->vma
6083 + htab->splt->output_offset
6084 + h->plt.offset);
6085 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
6086 rela.r_addend = 0;
6087
6088 loc = htab->srelplt->contents;
6089 loc += ((h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
6090 * sizeof (Elf64_External_Rela));
6091 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6092 }
6093
6094 if (h->got.offset != (bfd_vma) -1)
6095 {
6096 Elf_Internal_Rela rela;
6097 bfd_byte *loc;
6098
6099 /* This symbol has an entry in the global offset table. Set it
6100 up. */
6101
6102 if (htab->sgot == NULL || htab->srelgot == NULL)
6103 abort ();
6104
6105 rela.r_offset = (htab->sgot->output_section->vma
6106 + htab->sgot->output_offset
6107 + (h->got.offset &~ (bfd_vma) 1));
6108
6109 /* If this is a static link, or it is a -Bsymbolic link and the
6110 symbol is defined locally or was forced to be local because
6111 of a version file, we just want to emit a RELATIVE reloc.
6112 The entry in the global offset table will already have been
6113 initialized in the relocate_section function. */
6114 if (info->shared
6115 && (info->symbolic
6116 || h->dynindx == -1
6117 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
6118 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
6119 {
6120 BFD_ASSERT((h->got.offset & 1) != 0);
6121 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6122 rela.r_addend = (h->root.u.def.value
6123 + h->root.u.def.section->output_section->vma
6124 + h->root.u.def.section->output_offset);
6125 }
6126 else
6127 {
6128 BFD_ASSERT ((h->got.offset & 1) == 0);
6129 bfd_put_64 (output_bfd, (bfd_vma) 0,
6130 htab->sgot->contents + h->got.offset);
6131 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT);
6132 rela.r_addend = 0;
6133 }
6134
6135 loc = htab->srelgot->contents;
6136 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
6137 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6138 }
6139
6140 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
6141 {
6142 Elf_Internal_Rela rela;
6143 bfd_byte *loc;
6144
6145 /* This symbol needs a copy reloc. Set it up. */
6146
6147 if (h->dynindx == -1
6148 || (h->root.type != bfd_link_hash_defined
6149 && h->root.type != bfd_link_hash_defweak)
6150 || htab->srelbss == NULL)
6151 abort ();
6152
6153 rela.r_offset = (h->root.u.def.value
6154 + h->root.u.def.section->output_section->vma
6155 + h->root.u.def.section->output_offset);
6156 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
6157 rela.r_addend = 0;
6158 loc = htab->srelbss->contents;
6159 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
6160 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6161 }
6162
6163 /* Mark some specially defined symbols as absolute. */
6164 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
6165 sym->st_shndx = SHN_ABS;
6166
6167 return true;
6168 }
6169
6170 /* Used to decide how to sort relocs in an optimal manner for the
6171 dynamic linker, before writing them out. */
6172
6173 static enum elf_reloc_type_class
6174 ppc64_elf_reloc_type_class (rela)
6175 const Elf_Internal_Rela *rela;
6176 {
6177 enum elf_ppc_reloc_type r_type;
6178
6179 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info);
6180 switch (r_type)
6181 {
6182 case R_PPC64_RELATIVE:
6183 return reloc_class_relative;
6184 case R_PPC64_JMP_SLOT:
6185 return reloc_class_plt;
6186 case R_PPC64_COPY:
6187 return reloc_class_copy;
6188 default:
6189 return reloc_class_normal;
6190 }
6191 }
6192
6193 /* Finish up the dynamic sections. */
6194
6195 static boolean
6196 ppc64_elf_finish_dynamic_sections (output_bfd, info)
6197 bfd *output_bfd;
6198 struct bfd_link_info *info;
6199 {
6200 struct ppc_link_hash_table *htab;
6201 bfd *dynobj;
6202 asection *sdyn;
6203
6204 htab = ppc_hash_table (info);
6205 dynobj = htab->elf.dynobj;
6206 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
6207
6208 if (htab->elf.dynamic_sections_created)
6209 {
6210 Elf64_External_Dyn *dyncon, *dynconend;
6211
6212 if (sdyn == NULL || htab->sgot == NULL)
6213 abort ();
6214
6215 dyncon = (Elf64_External_Dyn *) sdyn->contents;
6216 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
6217 for (; dyncon < dynconend; dyncon++)
6218 {
6219 Elf_Internal_Dyn dyn;
6220 asection *s;
6221
6222 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
6223
6224 switch (dyn.d_tag)
6225 {
6226 default:
6227 continue;
6228
6229 case DT_PPC64_GLINK:
6230 dyn.d_un.d_ptr = (htab->sglink->output_section->vma
6231 + htab->sglink->output_offset);
6232 break;
6233
6234 case DT_PPC64_OPD:
6235 s = bfd_get_section_by_name (output_bfd, ".opd");
6236 if (s != NULL)
6237 dyn.d_un.d_ptr = s->vma;
6238 break;
6239
6240 case DT_PPC64_OPDSZ:
6241 s = bfd_get_section_by_name (output_bfd, ".opd");
6242 if (s != NULL)
6243 dyn.d_un.d_val = s->_raw_size;
6244 break;
6245
6246 case DT_PLTGOT:
6247 dyn.d_un.d_ptr = (htab->splt->output_section->vma
6248 + htab->splt->output_offset);
6249 break;
6250
6251 case DT_JMPREL:
6252 dyn.d_un.d_ptr = (htab->srelplt->output_section->vma
6253 + htab->srelplt->output_offset);
6254 break;
6255
6256 case DT_PLTRELSZ:
6257 dyn.d_un.d_val = htab->srelplt->_raw_size;
6258 break;
6259
6260 case DT_RELASZ:
6261 /* Don't count procedure linkage table relocs in the
6262 overall reloc count. */
6263 if (htab->srelplt != NULL)
6264 dyn.d_un.d_val -= htab->srelplt->_raw_size;
6265 break;
6266 }
6267
6268 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
6269 }
6270 }
6271
6272 if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
6273 {
6274 /* Fill in the first entry in the global offset table.
6275 We use it to hold the link-time TOCbase. */
6276 bfd_put_64 (output_bfd,
6277 elf_gp (output_bfd) + TOC_BASE_OFF,
6278 htab->sgot->contents);
6279
6280 /* Set .got entry size. */
6281 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
6282 }
6283
6284 if (htab->splt != NULL && htab->splt->_raw_size != 0)
6285 {
6286 /* Set .plt entry size. */
6287 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
6288 = PLT_ENTRY_SIZE;
6289 }
6290
6291 return true;
6292 }
6293
6294 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
6295 #define TARGET_LITTLE_NAME "elf64-powerpcle"
6296 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
6297 #define TARGET_BIG_NAME "elf64-powerpc"
6298 #define ELF_ARCH bfd_arch_powerpc
6299 #define ELF_MACHINE_CODE EM_PPC64
6300 #define ELF_MAXPAGESIZE 0x10000
6301 #define elf_info_to_howto ppc64_elf_info_to_howto
6302
6303 #ifdef EM_CYGNUS_POWERPC
6304 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6305 #endif
6306
6307 #ifdef EM_PPC_OLD
6308 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6309 #endif
6310
6311 #define elf_backend_want_got_sym 0
6312 #define elf_backend_want_plt_sym 0
6313 #define elf_backend_plt_alignment 3
6314 #define elf_backend_plt_not_loaded 1
6315 #define elf_backend_got_symbol_offset 0
6316 #define elf_backend_got_header_size 8
6317 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
6318 #define elf_backend_can_gc_sections 1
6319 #define elf_backend_can_refcount 1
6320 #define elf_backend_rela_normal 1
6321
6322 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
6323 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
6324 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
6325 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
6326
6327 #define elf_backend_object_p ppc64_elf_object_p
6328 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
6329 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
6330 #define elf_backend_check_relocs ppc64_elf_check_relocs
6331 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
6332 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
6333 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
6334 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
6335 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
6336 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
6337 #define elf_backend_relocate_section ppc64_elf_relocate_section
6338 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
6339 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
6340 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
6341
6342 #include "elf64-target.h"
GDB Binutils - Deliverables
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