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* elf64-ppc.c (ppc64_elf_build_stubs): Increment .glink indx.
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22 /* This file is based on the 64-bit PowerPC ELF ABI. It is also based
23 on the file elf32-ppc.c. */
24
25 #include "bfd.h"
26 #include "sysdep.h"
27 #include "bfdlink.h"
28 #include "libbfd.h"
29 #include "elf-bfd.h"
30 #include "elf/ppc.h"
31 #include "elf64-ppc.h"
32
33 static void ppc_howto_init
34 PARAMS ((void));
35 static reloc_howto_type *ppc64_elf_reloc_type_lookup
36 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
37 static void ppc64_elf_info_to_howto
38 PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst));
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
41 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
42 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
43 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
44 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
45 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
46 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
47 static bfd_reloc_status_type ppc64_elf_toc_reloc
48 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
49 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
50 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
51 static bfd_reloc_status_type ppc64_elf_toc64_reloc
52 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
53 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
54 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
55 static boolean ppc64_elf_object_p
56 PARAMS ((bfd *));
57 static boolean ppc64_elf_merge_private_bfd_data
58 PARAMS ((bfd *, bfd *));
59
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* The size in bytes of an entry in the procedure linkage table. */
66 #define PLT_ENTRY_SIZE 24
67
68 /* The initial size of the plt reserved for the dynamic linker. */
69 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
70
71 /* TOC base pointers offset from start of TOC. */
72 #define TOC_BASE_OFF (0x8000)
73
74 /* .plt call stub instructions. */
75 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
76 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
77 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
78 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
79 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
80 /* ld %r11,xxx+16@l(%r12) */
81 #define BCTR 0x4e800420 /* bctr */
82
83 /* The normal stub is this size. */
84 #define PLT_CALL_STUB_SIZE (7*4)
85
86 /* But sometimes the .plt entry crosses a 64k boundary, and we need
87 to adjust the high word with this insn. */
88 #define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */
89
90 /* The .glink fixup call stub is the same as the .plt call stub, but
91 the first instruction restores r2, and the std is omitted. */
92 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
93
94 /* Always allow this much space. */
95 #define GLINK_CALL_STUB_SIZE (8*4)
96
97 /* Pad with this. */
98 #define NOP 0x60000000
99
100 /* Some other nops. */
101 #define CROR_151515 0x4def7b82
102 #define CROR_313131 0x4ffffb82
103
104 /* .glink entries for the first 32k functions are two instructions. */
105 #define LI_R0_0 0x38000000 /* li %r0,0 */
106 #define B_DOT 0x48000000 /* b . */
107
108 /* After that, we need two instructions to load the index, followed by
109 a branch. */
110 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
111 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
112
113 /* Instructions to save and restore floating point regs. */
114 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
115 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
116 #define BLR 0x4e800020 /* blr */
117
118 /* Since .opd is an array of descriptors and each entry will end up
119 with identical R_PPC64_RELATIVE relocs, there is really no need to
120 propagate .opd relocs; The dynamic linker should be taught to
121 relocate .opd without reloc entries. */
122 #ifndef NO_OPD_RELOCS
123 #define NO_OPD_RELOCS 0
124 #endif
125 \f
126 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
127
128 /* Relocation HOWTO's. */
129 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max];
130
131 static reloc_howto_type ppc64_elf_howto_raw[] = {
132 /* This reloc does nothing. */
133 HOWTO (R_PPC64_NONE, /* type */
134 0, /* rightshift */
135 0, /* size (0 = byte, 1 = short, 2 = long) */
136 8, /* bitsize */
137 false, /* pc_relative */
138 0, /* bitpos */
139 complain_overflow_dont, /* complain_on_overflow */
140 bfd_elf_generic_reloc, /* special_function */
141 "R_PPC64_NONE", /* name */
142 false, /* partial_inplace */
143 0, /* src_mask */
144 0, /* dst_mask */
145 false), /* pcrel_offset */
146
147 /* A standard 32 bit relocation. */
148 HOWTO (R_PPC64_ADDR32, /* type */
149 0, /* rightshift */
150 2, /* size (0 = byte, 1 = short, 2 = long) */
151 32, /* bitsize */
152 false, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_bitfield, /* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_PPC64_ADDR32", /* name */
157 false, /* partial_inplace */
158 0, /* src_mask */
159 0xffffffff, /* dst_mask */
160 false), /* pcrel_offset */
161
162 /* An absolute 26 bit branch; the lower two bits must be zero.
163 FIXME: we don't check that, we just clear them. */
164 HOWTO (R_PPC64_ADDR24, /* type */
165 0, /* rightshift */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
167 26, /* bitsize */
168 false, /* pc_relative */
169 0, /* bitpos */
170 complain_overflow_bitfield, /* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_PPC64_ADDR24", /* name */
173 false, /* partial_inplace */
174 0, /* src_mask */
175 0x03fffffc, /* dst_mask */
176 false), /* pcrel_offset */
177
178 /* A standard 16 bit relocation. */
179 HOWTO (R_PPC64_ADDR16, /* type */
180 0, /* rightshift */
181 1, /* size (0 = byte, 1 = short, 2 = long) */
182 16, /* bitsize */
183 false, /* pc_relative */
184 0, /* bitpos */
185 complain_overflow_bitfield, /* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_PPC64_ADDR16", /* name */
188 false, /* partial_inplace */
189 0, /* src_mask */
190 0xffff, /* dst_mask */
191 false), /* pcrel_offset */
192
193 /* A 16 bit relocation without overflow. */
194 HOWTO (R_PPC64_ADDR16_LO, /* type */
195 0, /* rightshift */
196 1, /* size (0 = byte, 1 = short, 2 = long) */
197 16, /* bitsize */
198 false, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_dont,/* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC64_ADDR16_LO", /* name */
203 false, /* partial_inplace */
204 0, /* src_mask */
205 0xffff, /* dst_mask */
206 false), /* pcrel_offset */
207
208 /* Bits 16-31 of an address. */
209 HOWTO (R_PPC64_ADDR16_HI, /* type */
210 16, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 false, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_dont, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC64_ADDR16_HI", /* name */
218 false, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 false), /* pcrel_offset */
222
223 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
224 bits, treated as a signed number, is negative. */
225 HOWTO (R_PPC64_ADDR16_HA, /* type */
226 16, /* rightshift */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
228 16, /* bitsize */
229 false, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_dont, /* complain_on_overflow */
232 ppc64_elf_ha_reloc, /* special_function */
233 "R_PPC64_ADDR16_HA", /* name */
234 false, /* partial_inplace */
235 0, /* src_mask */
236 0xffff, /* dst_mask */
237 false), /* pcrel_offset */
238
239 /* An absolute 16 bit branch; the lower two bits must be zero.
240 FIXME: we don't check that, we just clear them. */
241 HOWTO (R_PPC64_ADDR14, /* type */
242 0, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 false, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_bitfield, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC64_ADDR14", /* name */
250 false, /* partial_inplace */
251 0, /* src_mask */
252 0x0000fffc, /* dst_mask */
253 false), /* pcrel_offset */
254
255 /* An absolute 16 bit branch, for which bit 10 should be set to
256 indicate that the branch is expected to be taken. The lower two
257 bits must be zero. */
258 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
259 0, /* rightshift */
260 2, /* size (0 = byte, 1 = short, 2 = long) */
261 16, /* bitsize */
262 false, /* pc_relative */
263 0, /* bitpos */
264 complain_overflow_bitfield, /* complain_on_overflow */
265 ppc64_elf_brtaken_reloc, /* special_function */
266 "R_PPC64_ADDR14_BRTAKEN",/* name */
267 false, /* partial_inplace */
268 0, /* src_mask */
269 0x0000fffc, /* dst_mask */
270 false), /* pcrel_offset */
271
272 /* An absolute 16 bit branch, for which bit 10 should be set to
273 indicate that the branch is not expected to be taken. The lower
274 two bits must be zero. */
275 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
276 0, /* rightshift */
277 2, /* size (0 = byte, 1 = short, 2 = long) */
278 16, /* bitsize */
279 false, /* pc_relative */
280 0, /* bitpos */
281 complain_overflow_bitfield, /* complain_on_overflow */
282 ppc64_elf_brtaken_reloc, /* special_function */
283 "R_PPC64_ADDR14_BRNTAKEN",/* name */
284 false, /* partial_inplace */
285 0, /* src_mask */
286 0x0000fffc, /* dst_mask */
287 false), /* pcrel_offset */
288
289 /* A relative 26 bit branch; the lower two bits must be zero. */
290 HOWTO (R_PPC64_REL24, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 26, /* bitsize */
294 true, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_signed, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC64_REL24", /* name */
299 false, /* partial_inplace */
300 0, /* src_mask */
301 0x03fffffc, /* dst_mask */
302 true), /* pcrel_offset */
303
304 /* A relative 16 bit branch; the lower two bits must be zero. */
305 HOWTO (R_PPC64_REL14, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 true, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_signed, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_REL14", /* name */
314 false, /* partial_inplace */
315 0, /* src_mask */
316 0x0000fffc, /* dst_mask */
317 true), /* pcrel_offset */
318
319 /* A relative 16 bit branch. Bit 10 should be set to indicate that
320 the branch is expected to be taken. The lower two bits must be
321 zero. */
322 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 true, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_signed, /* complain_on_overflow */
329 ppc64_elf_brtaken_reloc, /* special_function */
330 "R_PPC64_REL14_BRTAKEN", /* name */
331 false, /* partial_inplace */
332 0, /* src_mask */
333 0x0000fffc, /* dst_mask */
334 true), /* pcrel_offset */
335
336 /* A relative 16 bit branch. Bit 10 should be set to indicate that
337 the branch is not expected to be taken. The lower two bits must
338 be zero. */
339 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
340 0, /* rightshift */
341 2, /* size (0 = byte, 1 = short, 2 = long) */
342 16, /* bitsize */
343 true, /* pc_relative */
344 0, /* bitpos */
345 complain_overflow_signed, /* complain_on_overflow */
346 ppc64_elf_brtaken_reloc, /* special_function */
347 "R_PPC64_REL14_BRNTAKEN",/* name */
348 false, /* partial_inplace */
349 0, /* src_mask */
350 0x0000fffc, /* dst_mask */
351 true), /* pcrel_offset */
352
353 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
354 symbol. */
355 HOWTO (R_PPC64_GOT16, /* type */
356 0, /* rightshift */
357 1, /* size (0 = byte, 1 = short, 2 = long) */
358 16, /* bitsize */
359 false, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_signed, /* complain_on_overflow */
362 ppc64_elf_unhandled_reloc, /* special_function */
363 "R_PPC64_GOT16", /* name */
364 false, /* partial_inplace */
365 0, /* src_mask */
366 0xffff, /* dst_mask */
367 false), /* pcrel_offset */
368
369 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
370 the symbol. */
371 HOWTO (R_PPC64_GOT16_LO, /* type */
372 0, /* rightshift */
373 1, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 false, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_dont, /* complain_on_overflow */
378 ppc64_elf_unhandled_reloc, /* special_function */
379 "R_PPC64_GOT16_LO", /* name */
380 false, /* partial_inplace */
381 0, /* src_mask */
382 0xffff, /* dst_mask */
383 false), /* pcrel_offset */
384
385 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
386 the symbol. */
387 HOWTO (R_PPC64_GOT16_HI, /* type */
388 16, /* rightshift */
389 1, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
391 false, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_dont,/* complain_on_overflow */
394 ppc64_elf_unhandled_reloc, /* special_function */
395 "R_PPC64_GOT16_HI", /* name */
396 false, /* partial_inplace */
397 0, /* src_mask */
398 0xffff, /* dst_mask */
399 false), /* pcrel_offset */
400
401 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
402 the symbol. */
403 HOWTO (R_PPC64_GOT16_HA, /* type */
404 16, /* rightshift */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 false, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_dont,/* complain_on_overflow */
410 ppc64_elf_unhandled_reloc, /* special_function */
411 "R_PPC64_GOT16_HA", /* name */
412 false, /* partial_inplace */
413 0, /* src_mask */
414 0xffff, /* dst_mask */
415 false), /* pcrel_offset */
416
417 /* This is used only by the dynamic linker. The symbol should exist
418 both in the object being run and in some shared library. The
419 dynamic linker copies the data addressed by the symbol from the
420 shared library into the object, because the object being
421 run has to have the data at some particular address. */
422 HOWTO (R_PPC64_COPY, /* type */
423 0, /* rightshift */
424 0, /* this one is variable size */
425 0, /* bitsize */
426 false, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_dont, /* complain_on_overflow */
429 ppc64_elf_unhandled_reloc, /* special_function */
430 "R_PPC64_COPY", /* name */
431 false, /* partial_inplace */
432 0, /* src_mask */
433 0, /* dst_mask */
434 false), /* pcrel_offset */
435
436 /* Like R_PPC64_ADDR64, but used when setting global offset table
437 entries. */
438 HOWTO (R_PPC64_GLOB_DAT, /* type */
439 0, /* rightshift */
440 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
441 64, /* bitsize */
442 false, /* pc_relative */
443 0, /* bitpos */
444 complain_overflow_dont, /* complain_on_overflow */
445 ppc64_elf_unhandled_reloc, /* special_function */
446 "R_PPC64_GLOB_DAT", /* name */
447 false, /* partial_inplace */
448 0, /* src_mask */
449 ONES (64), /* dst_mask */
450 false), /* pcrel_offset */
451
452 /* Created by the link editor. Marks a procedure linkage table
453 entry for a symbol. */
454 HOWTO (R_PPC64_JMP_SLOT, /* type */
455 0, /* rightshift */
456 0, /* size (0 = byte, 1 = short, 2 = long) */
457 0, /* bitsize */
458 false, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_dont, /* complain_on_overflow */
461 ppc64_elf_unhandled_reloc, /* special_function */
462 "R_PPC64_JMP_SLOT", /* name */
463 false, /* partial_inplace */
464 0, /* src_mask */
465 0, /* dst_mask */
466 false), /* pcrel_offset */
467
468 /* Used only by the dynamic linker. When the object is run, this
469 doubleword64 is set to the load address of the object, plus the
470 addend. */
471 HOWTO (R_PPC64_RELATIVE, /* type */
472 0, /* rightshift */
473 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
474 64, /* bitsize */
475 false, /* pc_relative */
476 0, /* bitpos */
477 complain_overflow_dont, /* complain_on_overflow */
478 bfd_elf_generic_reloc, /* special_function */
479 "R_PPC64_RELATIVE", /* name */
480 false, /* partial_inplace */
481 0, /* src_mask */
482 ONES (64), /* dst_mask */
483 false), /* pcrel_offset */
484
485 /* Like R_PPC64_ADDR32, but may be unaligned. */
486 HOWTO (R_PPC64_UADDR32, /* type */
487 0, /* rightshift */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
489 32, /* bitsize */
490 false, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_bitfield, /* complain_on_overflow */
493 bfd_elf_generic_reloc, /* special_function */
494 "R_PPC64_UADDR32", /* name */
495 false, /* partial_inplace */
496 0, /* src_mask */
497 0xffffffff, /* dst_mask */
498 false), /* pcrel_offset */
499
500 /* Like R_PPC64_ADDR16, but may be unaligned. */
501 HOWTO (R_PPC64_UADDR16, /* type */
502 0, /* rightshift */
503 1, /* size (0 = byte, 1 = short, 2 = long) */
504 16, /* bitsize */
505 false, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_bitfield, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_PPC64_UADDR16", /* name */
510 false, /* partial_inplace */
511 0, /* src_mask */
512 0xffff, /* dst_mask */
513 false), /* pcrel_offset */
514
515 /* 32-bit PC relative. */
516 HOWTO (R_PPC64_REL32, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 true, /* pc_relative */
521 0, /* bitpos */
522 /* FIXME: Verify. Was complain_overflow_bitfield. */
523 complain_overflow_signed, /* complain_on_overflow */
524 bfd_elf_generic_reloc, /* special_function */
525 "R_PPC64_REL32", /* name */
526 false, /* partial_inplace */
527 0, /* src_mask */
528 0xffffffff, /* dst_mask */
529 true), /* pcrel_offset */
530
531 /* 32-bit relocation to the symbol's procedure linkage table. */
532 HOWTO (R_PPC64_PLT32, /* type */
533 0, /* rightshift */
534 2, /* size (0 = byte, 1 = short, 2 = long) */
535 32, /* bitsize */
536 false, /* pc_relative */
537 0, /* bitpos */
538 complain_overflow_bitfield, /* complain_on_overflow */
539 ppc64_elf_unhandled_reloc, /* special_function */
540 "R_PPC64_PLT32", /* name */
541 false, /* partial_inplace */
542 0, /* src_mask */
543 0xffffffff, /* dst_mask */
544 false), /* pcrel_offset */
545
546 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
547 FIXME: R_PPC64_PLTREL32 not supported. */
548 HOWTO (R_PPC64_PLTREL32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 true, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_signed, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC64_PLTREL32", /* name */
557 false, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 true), /* pcrel_offset */
561
562 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
563 the symbol. */
564 HOWTO (R_PPC64_PLT16_LO, /* type */
565 0, /* rightshift */
566 1, /* size (0 = byte, 1 = short, 2 = long) */
567 16, /* bitsize */
568 false, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_dont, /* complain_on_overflow */
571 ppc64_elf_unhandled_reloc, /* special_function */
572 "R_PPC64_PLT16_LO", /* name */
573 false, /* partial_inplace */
574 0, /* src_mask */
575 0xffff, /* dst_mask */
576 false), /* pcrel_offset */
577
578 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
579 the symbol. */
580 HOWTO (R_PPC64_PLT16_HI, /* type */
581 16, /* rightshift */
582 1, /* size (0 = byte, 1 = short, 2 = long) */
583 16, /* bitsize */
584 false, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_dont, /* complain_on_overflow */
587 ppc64_elf_unhandled_reloc, /* special_function */
588 "R_PPC64_PLT16_HI", /* name */
589 false, /* partial_inplace */
590 0, /* src_mask */
591 0xffff, /* dst_mask */
592 false), /* pcrel_offset */
593
594 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
595 the symbol. */
596 HOWTO (R_PPC64_PLT16_HA, /* type */
597 16, /* rightshift */
598 1, /* size (0 = byte, 1 = short, 2 = long) */
599 16, /* bitsize */
600 false, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_dont, /* complain_on_overflow */
603 ppc64_elf_unhandled_reloc, /* special_function */
604 "R_PPC64_PLT16_HA", /* name */
605 false, /* partial_inplace */
606 0, /* src_mask */
607 0xffff, /* dst_mask */
608 false), /* pcrel_offset */
609
610 /* 16-bit section relative relocation. */
611 HOWTO (R_PPC64_SECTOFF, /* type */
612 0, /* rightshift */
613 1, /* size (0 = byte, 1 = short, 2 = long) */
614 16, /* bitsize */
615 false, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_bitfield, /* complain_on_overflow */
618 ppc64_elf_sectoff_reloc, /* special_function */
619 "R_PPC64_SECTOFF", /* name */
620 false, /* partial_inplace */
621 0, /* src_mask */
622 0xffff, /* dst_mask */
623 false), /* pcrel_offset */
624
625 /* Like R_PPC64_SECTOFF, but no overflow warning. */
626 HOWTO (R_PPC64_SECTOFF_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 false, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 ppc64_elf_sectoff_reloc, /* special_function */
634 "R_PPC64_SECTOFF_LO", /* name */
635 false, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 false), /* pcrel_offset */
639
640 /* 16-bit upper half section relative relocation. */
641 HOWTO (R_PPC64_SECTOFF_HI, /* type */
642 16, /* rightshift */
643 1, /* size (0 = byte, 1 = short, 2 = long) */
644 16, /* bitsize */
645 false, /* pc_relative */
646 0, /* bitpos */
647 complain_overflow_dont, /* complain_on_overflow */
648 ppc64_elf_sectoff_reloc, /* special_function */
649 "R_PPC64_SECTOFF_HI", /* name */
650 false, /* partial_inplace */
651 0, /* src_mask */
652 0xffff, /* dst_mask */
653 false), /* pcrel_offset */
654
655 /* 16-bit upper half adjusted section relative relocation. */
656 HOWTO (R_PPC64_SECTOFF_HA, /* type */
657 16, /* rightshift */
658 1, /* size (0 = byte, 1 = short, 2 = long) */
659 16, /* bitsize */
660 false, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_dont, /* complain_on_overflow */
663 ppc64_elf_sectoff_ha_reloc, /* special_function */
664 "R_PPC64_SECTOFF_HA", /* name */
665 false, /* partial_inplace */
666 0, /* src_mask */
667 0xffff, /* dst_mask */
668 false), /* pcrel_offset */
669
670 /* Like R_PPC64_REL24 without touching the two least significant
671 bits. Should have been named R_PPC64_REL30! */
672 HOWTO (R_PPC64_ADDR30, /* type */
673 2, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 30, /* bitsize */
676 true, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_dont, /* complain_on_overflow */
679 bfd_elf_generic_reloc, /* special_function */
680 "R_PPC64_ADDR30", /* name */
681 false, /* partial_inplace */
682 0, /* src_mask */
683 0xfffffffc, /* dst_mask */
684 true), /* pcrel_offset */
685
686 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
687
688 /* A standard 64-bit relocation. */
689 HOWTO (R_PPC64_ADDR64, /* type */
690 0, /* rightshift */
691 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
692 64, /* bitsize */
693 false, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_dont, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC64_ADDR64", /* name */
698 false, /* partial_inplace */
699 0, /* src_mask */
700 ONES (64), /* dst_mask */
701 false), /* pcrel_offset */
702
703 /* The bits 32-47 of an address. */
704 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
705 32, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 false, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC64_ADDR16_HIGHER", /* name */
713 false, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 false), /* pcrel_offset */
717
718 /* The bits 32-47 of an address, plus 1 if the contents of the low
719 16 bits, treated as a signed number, is negative. */
720 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
721 32, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 false, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_dont, /* complain_on_overflow */
727 ppc64_elf_ha_reloc, /* special_function */
728 "R_PPC64_ADDR16_HIGHERA", /* name */
729 false, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 false), /* pcrel_offset */
733
734 /* The bits 48-63 of an address. */
735 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
736 48, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 false, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_dont, /* complain_on_overflow */
742 bfd_elf_generic_reloc, /* special_function */
743 "R_PPC64_ADDR16_HIGHEST", /* name */
744 false, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 false), /* pcrel_offset */
748
749 /* The bits 48-63 of an address, plus 1 if the contents of the low
750 16 bits, treated as a signed number, is negative. */
751 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
752 48, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 false, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 ppc64_elf_ha_reloc, /* special_function */
759 "R_PPC64_ADDR16_HIGHESTA", /* name */
760 false, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 false), /* pcrel_offset */
764
765 /* Like ADDR64, but may be unaligned. */
766 HOWTO (R_PPC64_UADDR64, /* type */
767 0, /* rightshift */
768 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
769 64, /* bitsize */
770 false, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 bfd_elf_generic_reloc, /* special_function */
774 "R_PPC64_UADDR64", /* name */
775 false, /* partial_inplace */
776 0, /* src_mask */
777 ONES (64), /* dst_mask */
778 false), /* pcrel_offset */
779
780 /* 64-bit relative relocation. */
781 HOWTO (R_PPC64_REL64, /* type */
782 0, /* rightshift */
783 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
784 64, /* bitsize */
785 true, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_dont, /* complain_on_overflow */
788 bfd_elf_generic_reloc, /* special_function */
789 "R_PPC64_REL64", /* name */
790 false, /* partial_inplace */
791 0, /* src_mask */
792 ONES (64), /* dst_mask */
793 true), /* pcrel_offset */
794
795 /* 64-bit relocation to the symbol's procedure linkage table. */
796 HOWTO (R_PPC64_PLT64, /* type */
797 0, /* rightshift */
798 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
799 64, /* bitsize */
800 false, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_dont, /* complain_on_overflow */
803 ppc64_elf_unhandled_reloc, /* special_function */
804 "R_PPC64_PLT64", /* name */
805 false, /* partial_inplace */
806 0, /* src_mask */
807 ONES (64), /* dst_mask */
808 false), /* pcrel_offset */
809
810 /* 64-bit PC relative relocation to the symbol's procedure linkage
811 table. */
812 /* FIXME: R_PPC64_PLTREL64 not supported. */
813 HOWTO (R_PPC64_PLTREL64, /* type */
814 0, /* rightshift */
815 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
816 64, /* bitsize */
817 true, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 ppc64_elf_unhandled_reloc, /* special_function */
821 "R_PPC64_PLTREL64", /* name */
822 false, /* partial_inplace */
823 0, /* src_mask */
824 ONES (64), /* dst_mask */
825 true), /* pcrel_offset */
826
827 /* 16 bit TOC-relative relocation. */
828
829 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
830 HOWTO (R_PPC64_TOC16, /* type */
831 0, /* rightshift */
832 1, /* size (0 = byte, 1 = short, 2 = long) */
833 16, /* bitsize */
834 false, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_signed, /* complain_on_overflow */
837 ppc64_elf_toc_reloc, /* special_function */
838 "R_PPC64_TOC16", /* name */
839 false, /* partial_inplace */
840 0, /* src_mask */
841 0xffff, /* dst_mask */
842 false), /* pcrel_offset */
843
844 /* 16 bit TOC-relative relocation without overflow. */
845
846 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
847 HOWTO (R_PPC64_TOC16_LO, /* type */
848 0, /* rightshift */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
850 16, /* bitsize */
851 false, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_toc_reloc, /* special_function */
855 "R_PPC64_TOC16_LO", /* name */
856 false, /* partial_inplace */
857 0, /* src_mask */
858 0xffff, /* dst_mask */
859 false), /* pcrel_offset */
860
861 /* 16 bit TOC-relative relocation, high 16 bits. */
862
863 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
864 HOWTO (R_PPC64_TOC16_HI, /* type */
865 16, /* rightshift */
866 1, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 false, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 ppc64_elf_toc_reloc, /* special_function */
872 "R_PPC64_TOC16_HI", /* name */
873 false, /* partial_inplace */
874 0, /* src_mask */
875 0xffff, /* dst_mask */
876 false), /* pcrel_offset */
877
878 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
879 contents of the low 16 bits, treated as a signed number, is
880 negative. */
881
882 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
883 HOWTO (R_PPC64_TOC16_HA, /* type */
884 16, /* rightshift */
885 1, /* size (0 = byte, 1 = short, 2 = long) */
886 16, /* bitsize */
887 false, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc64_elf_toc_ha_reloc, /* special_function */
891 "R_PPC64_TOC16_HA", /* name */
892 false, /* partial_inplace */
893 0, /* src_mask */
894 0xffff, /* dst_mask */
895 false), /* pcrel_offset */
896
897 /* 64-bit relocation; insert value of TOC base (.TOC.). */
898
899 /* R_PPC64_TOC 51 doubleword64 .TOC. */
900 HOWTO (R_PPC64_TOC, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 false, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_bitfield, /* complain_on_overflow */
907 ppc64_elf_toc64_reloc, /* special_function */
908 "R_PPC64_TOC", /* name */
909 false, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 false), /* pcrel_offset */
913
914 /* Like R_PPC64_GOT16, but also informs the link editor that the
915 value to relocate may (!) refer to a PLT entry which the link
916 editor (a) may replace with the symbol value. If the link editor
917 is unable to fully resolve the symbol, it may (b) create a PLT
918 entry and store the address to the new PLT entry in the GOT.
919 This permits lazy resolution of function symbols at run time.
920 The link editor may also skip all of this and just (c) emit a
921 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
922 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
923 HOWTO (R_PPC64_PLTGOT16, /* type */
924 0, /* rightshift */
925 1, /* size (0 = byte, 1 = short, 2 = long) */
926 16, /* bitsize */
927 false, /* pc_relative */
928 0, /* bitpos */
929 complain_overflow_signed, /* complain_on_overflow */
930 ppc64_elf_unhandled_reloc, /* special_function */
931 "R_PPC64_PLTGOT16", /* name */
932 false, /* partial_inplace */
933 0, /* src_mask */
934 0xffff, /* dst_mask */
935 false), /* pcrel_offset */
936
937 /* Like R_PPC64_PLTGOT16, but without overflow. */
938 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
939 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
940 0, /* rightshift */
941 1, /* size (0 = byte, 1 = short, 2 = long) */
942 16, /* bitsize */
943 false, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc64_elf_unhandled_reloc, /* special_function */
947 "R_PPC64_PLTGOT16_LO", /* name */
948 false, /* partial_inplace */
949 0, /* src_mask */
950 0xffff, /* dst_mask */
951 false), /* pcrel_offset */
952
953 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
954 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
955 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
956 16, /* rightshift */
957 1, /* size (0 = byte, 1 = short, 2 = long) */
958 16, /* bitsize */
959 false, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc64_elf_unhandled_reloc, /* special_function */
963 "R_PPC64_PLTGOT16_HI", /* name */
964 false, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 false), /* pcrel_offset */
968
969 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
970 1 if the contents of the low 16 bits, treated as a signed number,
971 is negative. */
972 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
973 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
974 16, /* rightshift */
975 1, /* size (0 = byte, 1 = short, 2 = long) */
976 16, /* bitsize */
977 false, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_dont,/* complain_on_overflow */
980 ppc64_elf_unhandled_reloc, /* special_function */
981 "R_PPC64_PLTGOT16_HA", /* name */
982 false, /* partial_inplace */
983 0, /* src_mask */
984 0xffff, /* dst_mask */
985 false), /* pcrel_offset */
986
987 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
988 HOWTO (R_PPC64_ADDR16_DS, /* type */
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 false, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_bitfield, /* complain_on_overflow */
995 bfd_elf_generic_reloc, /* special_function */
996 "R_PPC64_ADDR16_DS", /* name */
997 false, /* partial_inplace */
998 0, /* src_mask */
999 0xfffc, /* dst_mask */
1000 false), /* pcrel_offset */
1001
1002 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1003 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 false, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont,/* complain_on_overflow */
1010 bfd_elf_generic_reloc, /* special_function */
1011 "R_PPC64_ADDR16_LO_DS",/* name */
1012 false, /* partial_inplace */
1013 0, /* src_mask */
1014 0xfffc, /* dst_mask */
1015 false), /* pcrel_offset */
1016
1017 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1018 HOWTO (R_PPC64_GOT16_DS, /* type */
1019 0, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 false, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_signed, /* complain_on_overflow */
1025 ppc64_elf_unhandled_reloc, /* special_function */
1026 "R_PPC64_GOT16_DS", /* name */
1027 false, /* partial_inplace */
1028 0, /* src_mask */
1029 0xfffc, /* dst_mask */
1030 false), /* pcrel_offset */
1031
1032 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1033 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1034 0, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 false, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc64_elf_unhandled_reloc, /* special_function */
1041 "R_PPC64_GOT16_LO_DS", /* name */
1042 false, /* partial_inplace */
1043 0, /* src_mask */
1044 0xfffc, /* dst_mask */
1045 false), /* pcrel_offset */
1046
1047 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1048 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1049 0, /* rightshift */
1050 1, /* size (0 = byte, 1 = short, 2 = long) */
1051 16, /* bitsize */
1052 false, /* pc_relative */
1053 0, /* bitpos */
1054 complain_overflow_dont, /* complain_on_overflow */
1055 ppc64_elf_unhandled_reloc, /* special_function */
1056 "R_PPC64_PLT16_LO_DS", /* name */
1057 false, /* partial_inplace */
1058 0, /* src_mask */
1059 0xfffc, /* dst_mask */
1060 false), /* pcrel_offset */
1061
1062 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1063 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1064 0, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 false, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_bitfield, /* complain_on_overflow */
1070 ppc64_elf_sectoff_reloc, /* special_function */
1071 "R_PPC64_SECTOFF_DS", /* name */
1072 false, /* partial_inplace */
1073 0, /* src_mask */
1074 0xfffc, /* dst_mask */
1075 false), /* pcrel_offset */
1076
1077 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1078 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 false, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_sectoff_reloc, /* special_function */
1086 "R_PPC64_SECTOFF_LO_DS",/* name */
1087 false, /* partial_inplace */
1088 0, /* src_mask */
1089 0xfffc, /* dst_mask */
1090 false), /* pcrel_offset */
1091
1092 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1093 HOWTO (R_PPC64_TOC16_DS, /* type */
1094 0, /* rightshift */
1095 1, /* size (0 = byte, 1 = short, 2 = long) */
1096 16, /* bitsize */
1097 false, /* pc_relative */
1098 0, /* bitpos */
1099 complain_overflow_signed, /* complain_on_overflow */
1100 ppc64_elf_toc_reloc, /* special_function */
1101 "R_PPC64_TOC16_DS", /* name */
1102 false, /* partial_inplace */
1103 0, /* src_mask */
1104 0xfffc, /* dst_mask */
1105 false), /* pcrel_offset */
1106
1107 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1108 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1109 0, /* rightshift */
1110 1, /* size (0 = byte, 1 = short, 2 = long) */
1111 16, /* bitsize */
1112 false, /* pc_relative */
1113 0, /* bitpos */
1114 complain_overflow_dont, /* complain_on_overflow */
1115 ppc64_elf_toc_reloc, /* special_function */
1116 "R_PPC64_TOC16_LO_DS", /* name */
1117 false, /* partial_inplace */
1118 0, /* src_mask */
1119 0xfffc, /* dst_mask */
1120 false), /* pcrel_offset */
1121
1122 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1123 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1124 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1125 0, /* rightshift */
1126 1, /* size (0 = byte, 1 = short, 2 = long) */
1127 16, /* bitsize */
1128 false, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_signed, /* complain_on_overflow */
1131 ppc64_elf_unhandled_reloc, /* special_function */
1132 "R_PPC64_PLTGOT16_DS", /* name */
1133 false, /* partial_inplace */
1134 0, /* src_mask */
1135 0xfffc, /* dst_mask */
1136 false), /* pcrel_offset */
1137
1138 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1139 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1140 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1141 0, /* rightshift */
1142 1, /* size (0 = byte, 1 = short, 2 = long) */
1143 16, /* bitsize */
1144 false, /* pc_relative */
1145 0, /* bitpos */
1146 complain_overflow_dont, /* complain_on_overflow */
1147 ppc64_elf_unhandled_reloc, /* special_function */
1148 "R_PPC64_PLTGOT16_LO_DS",/* name */
1149 false, /* partial_inplace */
1150 0, /* src_mask */
1151 0xfffc, /* dst_mask */
1152 false), /* pcrel_offset */
1153
1154 /* GNU extension to record C++ vtable hierarchy. */
1155 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1156 0, /* rightshift */
1157 0, /* size (0 = byte, 1 = short, 2 = long) */
1158 0, /* bitsize */
1159 false, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_dont, /* complain_on_overflow */
1162 NULL, /* special_function */
1163 "R_PPC64_GNU_VTINHERIT", /* name */
1164 false, /* partial_inplace */
1165 0, /* src_mask */
1166 0, /* dst_mask */
1167 false), /* pcrel_offset */
1168
1169 /* GNU extension to record C++ vtable member usage. */
1170 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1171 0, /* rightshift */
1172 0, /* size (0 = byte, 1 = short, 2 = long) */
1173 0, /* bitsize */
1174 false, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_dont, /* complain_on_overflow */
1177 NULL, /* special_function */
1178 "R_PPC64_GNU_VTENTRY", /* name */
1179 false, /* partial_inplace */
1180 0, /* src_mask */
1181 0, /* dst_mask */
1182 false), /* pcrel_offset */
1183 };
1184
1185 \f
1186 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1187 be done. */
1188
1189 static void
1190 ppc_howto_init ()
1191 {
1192 unsigned int i, type;
1193
1194 for (i = 0;
1195 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1196 i++)
1197 {
1198 type = ppc64_elf_howto_raw[i].type;
1199 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1200 / sizeof (ppc64_elf_howto_table[0])));
1201 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1202 }
1203 }
1204
1205 static reloc_howto_type *
1206 ppc64_elf_reloc_type_lookup (abfd, code)
1207 bfd *abfd ATTRIBUTE_UNUSED;
1208 bfd_reloc_code_real_type code;
1209 {
1210 enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE;
1211
1212 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1213 /* Initialize howto table if needed. */
1214 ppc_howto_init ();
1215
1216 switch ((int) code)
1217 {
1218 default:
1219 return (reloc_howto_type *) NULL;
1220
1221 case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE;
1222 break;
1223 case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32;
1224 break;
1225 case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24;
1226 break;
1227 case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16;
1228 break;
1229 case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO;
1230 break;
1231 case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI;
1232 break;
1233 case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA;
1234 break;
1235 case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14;
1236 break;
1237 case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN;
1238 break;
1239 case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN;
1240 break;
1241 case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24;
1242 break;
1243 case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14;
1244 break;
1245 case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN;
1246 break;
1247 case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN;
1248 break;
1249 case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16;
1250 break;
1251 case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO;
1252 break;
1253 case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI;
1254 break;
1255 case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA;
1256 break;
1257 case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY;
1258 break;
1259 case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT;
1260 break;
1261 case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32;
1262 break;
1263 case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32;
1264 break;
1265 case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32;
1266 break;
1267 case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO;
1268 break;
1269 case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI;
1270 break;
1271 case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA;
1272 break;
1273 case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC64_SECTOFF;
1274 break;
1275 case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO;
1276 break;
1277 case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI;
1278 break;
1279 case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA;
1280 break;
1281 case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64;
1282 break;
1283 case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64;
1284 break;
1285 case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER;
1286 break;
1287 case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA;
1288 break;
1289 case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST;
1290 break;
1291 case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA;
1292 break;
1293 case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64;
1294 break;
1295 case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64;
1296 break;
1297 case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64;
1298 break;
1299 case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16;
1300 break;
1301 case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO;
1302 break;
1303 case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI;
1304 break;
1305 case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA;
1306 break;
1307 case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC;
1308 break;
1309 case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16;
1310 break;
1311 case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO;
1312 break;
1313 case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI;
1314 break;
1315 case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA;
1316 break;
1317 case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS;
1318 break;
1319 case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS;
1320 break;
1321 case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS;
1322 break;
1323 case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS;
1324 break;
1325 case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS;
1326 break;
1327 case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS;
1328 break;
1329 case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS;
1330 break;
1331 case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS;
1332 break;
1333 case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS;
1334 break;
1335 case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS;
1336 break;
1337 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS;
1338 break;
1339 case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT;
1340 break;
1341 case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY;
1342 break;
1343 }
1344
1345 return ppc64_elf_howto_table[(int) ppc_reloc];
1346 };
1347
1348 /* Set the howto pointer for a PowerPC ELF reloc. */
1349
1350 static void
1351 ppc64_elf_info_to_howto (abfd, cache_ptr, dst)
1352 bfd *abfd ATTRIBUTE_UNUSED;
1353 arelent *cache_ptr;
1354 Elf64_Internal_Rela *dst;
1355 {
1356 unsigned int type;
1357
1358 /* Initialize howto table if needed. */
1359 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1360 ppc_howto_init ();
1361
1362 type = ELF64_R_TYPE (dst->r_info);
1363 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1364 / sizeof (ppc64_elf_howto_table[0])));
1365 cache_ptr->howto = ppc64_elf_howto_table[type];
1366 }
1367
1368 /* Handle the R_PPC_ADDR16_HA and similar relocs. */
1369
1370 static bfd_reloc_status_type
1371 ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data,
1372 input_section, output_bfd, error_message)
1373 bfd *abfd;
1374 arelent *reloc_entry;
1375 asymbol *symbol;
1376 PTR data;
1377 asection *input_section;
1378 bfd *output_bfd;
1379 char **error_message;
1380 {
1381 /* If this is a relocatable link (output_bfd test tells us), just
1382 call the generic function. Any adjustment will be done at final
1383 link time. */
1384 if (output_bfd != NULL)
1385 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1386 input_section, output_bfd, error_message);
1387
1388 /* Adjust the addend for sign extension of the low 16 bits.
1389 We won't actually be using the low 16 bits, so trashing them
1390 doesn't matter. */
1391 reloc_entry->addend += 0x8000;
1392 return bfd_reloc_continue;
1393 }
1394
1395 static bfd_reloc_status_type
1396 ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data,
1397 input_section, output_bfd, error_message)
1398 bfd *abfd;
1399 arelent *reloc_entry;
1400 asymbol *symbol;
1401 PTR data;
1402 asection *input_section;
1403 bfd *output_bfd;
1404 char **error_message;
1405 {
1406 long insn;
1407 enum elf_ppc_reloc_type r_type;
1408 bfd_size_type octets;
1409 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
1410 boolean is_power4 = false;
1411
1412 /* If this is a relocatable link (output_bfd test tells us), just
1413 call the generic function. Any adjustment will be done at final
1414 link time. */
1415 if (output_bfd != NULL)
1416 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1417 input_section, output_bfd, error_message);
1418
1419 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
1420 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
1421 insn &= ~(0x01 << 21);
1422 r_type = (enum elf_ppc_reloc_type) reloc_entry->howto->type;
1423 if (r_type == R_PPC64_ADDR14_BRTAKEN
1424 || r_type == R_PPC64_REL14_BRTAKEN)
1425 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
1426
1427 if (is_power4)
1428 {
1429 /* Set 'a' bit. This is 0b00010 in BO field for branch
1430 on CR(BI) insns (BO == 001at or 011at), and 0b01000
1431 for branch on CTR insns (BO == 1a00t or 1a01t). */
1432 if ((insn & (0x14 << 21)) == (0x04 << 21))
1433 insn |= 0x02 << 21;
1434 else if ((insn & (0x14 << 21)) == (0x10 << 21))
1435 insn |= 0x08 << 21;
1436 else
1437 return bfd_reloc_continue;
1438 }
1439 else
1440 {
1441 bfd_vma target = 0;
1442 bfd_vma from;
1443
1444 if (!bfd_is_com_section (symbol->section))
1445 target = symbol->value;
1446 target += symbol->section->output_section->vma;
1447 target += symbol->section->output_offset;
1448 target += reloc_entry->addend;
1449
1450 from = (reloc_entry->address
1451 + input_section->output_offset
1452 + input_section->output_section->vma);
1453
1454 /* Invert 'y' bit if not the default. */
1455 if ((bfd_signed_vma) (target - from) < 0)
1456 insn ^= 0x01 << 21;
1457 }
1458 bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets);
1459 return bfd_reloc_continue;
1460 }
1461
1462 static bfd_reloc_status_type
1463 ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data,
1464 input_section, output_bfd, error_message)
1465 bfd *abfd;
1466 arelent *reloc_entry;
1467 asymbol *symbol;
1468 PTR data;
1469 asection *input_section;
1470 bfd *output_bfd;
1471 char **error_message;
1472 {
1473 /* If this is a relocatable link (output_bfd test tells us), just
1474 call the generic function. Any adjustment will be done at final
1475 link time. */
1476 if (output_bfd != NULL)
1477 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1478 input_section, output_bfd, error_message);
1479
1480 /* Subtract the symbol section base address. */
1481 reloc_entry->addend -= symbol->section->output_section->vma;
1482 return bfd_reloc_continue;
1483 }
1484
1485 static bfd_reloc_status_type
1486 ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data,
1487 input_section, output_bfd, error_message)
1488 bfd *abfd;
1489 arelent *reloc_entry;
1490 asymbol *symbol;
1491 PTR data;
1492 asection *input_section;
1493 bfd *output_bfd;
1494 char **error_message;
1495 {
1496 /* If this is a relocatable link (output_bfd test tells us), just
1497 call the generic function. Any adjustment will be done at final
1498 link time. */
1499 if (output_bfd != NULL)
1500 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1501 input_section, output_bfd, error_message);
1502
1503 /* Subtract the symbol section base address. */
1504 reloc_entry->addend -= symbol->section->output_section->vma;
1505
1506 /* Adjust the addend for sign extension of the low 16 bits. */
1507 reloc_entry->addend += 0x8000;
1508 return bfd_reloc_continue;
1509 }
1510
1511 static bfd_reloc_status_type
1512 ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data,
1513 input_section, output_bfd, error_message)
1514 bfd *abfd;
1515 arelent *reloc_entry;
1516 asymbol *symbol;
1517 PTR data;
1518 asection *input_section;
1519 bfd *output_bfd;
1520 char **error_message;
1521 {
1522 bfd_vma TOCstart;
1523
1524 /* If this is a relocatable link (output_bfd test tells us), just
1525 call the generic function. Any adjustment will be done at final
1526 link time. */
1527 if (output_bfd != NULL)
1528 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1529 input_section, output_bfd, error_message);
1530
1531 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
1532 if (TOCstart == 0)
1533 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
1534
1535 /* Subtract the TOC base address. */
1536 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
1537 return bfd_reloc_continue;
1538 }
1539
1540 static bfd_reloc_status_type
1541 ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data,
1542 input_section, output_bfd, error_message)
1543 bfd *abfd;
1544 arelent *reloc_entry;
1545 asymbol *symbol;
1546 PTR data;
1547 asection *input_section;
1548 bfd *output_bfd;
1549 char **error_message;
1550 {
1551 bfd_vma TOCstart;
1552
1553 /* If this is a relocatable link (output_bfd test tells us), just
1554 call the generic function. Any adjustment will be done at final
1555 link time. */
1556 if (output_bfd != NULL)
1557 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1558 input_section, output_bfd, error_message);
1559
1560 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
1561 if (TOCstart == 0)
1562 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
1563
1564 /* Subtract the TOC base address. */
1565 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
1566
1567 /* Adjust the addend for sign extension of the low 16 bits. */
1568 reloc_entry->addend += 0x8000;
1569 return bfd_reloc_continue;
1570 }
1571
1572 static bfd_reloc_status_type
1573 ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data,
1574 input_section, output_bfd, error_message)
1575 bfd *abfd;
1576 arelent *reloc_entry;
1577 asymbol *symbol;
1578 PTR data;
1579 asection *input_section;
1580 bfd *output_bfd;
1581 char **error_message;
1582 {
1583 bfd_vma TOCstart;
1584 bfd_size_type octets;
1585
1586 /* If this is a relocatable link (output_bfd test tells us), just
1587 call the generic function. Any adjustment will be done at final
1588 link time. */
1589 if (output_bfd != NULL)
1590 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1591 input_section, output_bfd, error_message);
1592
1593 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
1594 if (TOCstart == 0)
1595 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
1596
1597 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
1598 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
1599 return bfd_reloc_ok;
1600 }
1601
1602 static bfd_reloc_status_type
1603 ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data,
1604 input_section, output_bfd, error_message)
1605 bfd *abfd;
1606 arelent *reloc_entry;
1607 asymbol *symbol;
1608 PTR data;
1609 asection *input_section;
1610 bfd *output_bfd;
1611 char **error_message;
1612 {
1613 /* If this is a relocatable link (output_bfd test tells us), just
1614 call the generic function. Any adjustment will be done at final
1615 link time. */
1616 if (output_bfd != NULL)
1617 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1618 input_section, output_bfd, error_message);
1619
1620 if (error_message != NULL)
1621 {
1622 static char buf[60];
1623 sprintf (buf, "generic linker can't handle %s",
1624 reloc_entry->howto->name);
1625 *error_message = buf;
1626 }
1627 return bfd_reloc_dangerous;
1628 }
1629
1630 /* Fix bad default arch selected for a 64 bit input bfd when the
1631 default is 32 bit. */
1632
1633 static boolean
1634 ppc64_elf_object_p (abfd)
1635 bfd *abfd;
1636 {
1637 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
1638 {
1639 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1640
1641 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
1642 {
1643 /* Relies on arch after 32 bit default being 64 bit default. */
1644 abfd->arch_info = abfd->arch_info->next;
1645 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
1646 }
1647 }
1648 return true;
1649 }
1650
1651 /* Merge backend specific data from an object file to the output
1652 object file when linking. */
1653
1654 static boolean
1655 ppc64_elf_merge_private_bfd_data (ibfd, obfd)
1656 bfd *ibfd;
1657 bfd *obfd;
1658 {
1659 /* Check if we have the same endianess. */
1660 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
1661 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
1662 {
1663 const char *msg;
1664
1665 if (bfd_big_endian (ibfd))
1666 msg = _("%s: compiled for a big endian system and target is little endian");
1667 else
1668 msg = _("%s: compiled for a little endian system and target is big endian");
1669
1670 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
1671
1672 bfd_set_error (bfd_error_wrong_format);
1673 return false;
1674 }
1675
1676 return true;
1677 }
1678 \f
1679 /* The following functions are specific to the ELF linker, while
1680 functions above are used generally. Those named ppc64_elf_* are
1681 called by the main ELF linker code. They appear in this file more
1682 or less in the order in which they are called. eg.
1683 ppc64_elf_check_relocs is called early in the link process,
1684 ppc64_elf_finish_dynamic_sections is one of the last functions
1685 called.
1686
1687 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
1688 functions have both a function code symbol and a function descriptor
1689 symbol. A call to foo in a relocatable object file looks like:
1690
1691 . .text
1692 . x:
1693 . bl .foo
1694 . nop
1695
1696 The function definition in another object file might be:
1697
1698 . .section .opd
1699 . foo: .quad .foo
1700 . .quad .TOC.@tocbase
1701 . .quad 0
1702 .
1703 . .text
1704 . .foo: blr
1705
1706 When the linker resolves the call during a static link, the branch
1707 unsurprisingly just goes to .foo and the .opd information is unused.
1708 If the function definition is in a shared library, things are a little
1709 different: The call goes via a plt call stub, the opd information gets
1710 copied to the plt, and the linker patches the nop.
1711
1712 . x:
1713 . bl .foo_stub
1714 . ld 2,40(1)
1715 .
1716 .
1717 . .foo_stub:
1718 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
1719 . addi 12,12,Lfoo@toc@l # is slightly optimised, but
1720 . std 2,40(1) # this is the general idea
1721 . ld 11,0(12)
1722 . ld 2,8(12)
1723 . mtctr 11
1724 . ld 11,16(12)
1725 . bctr
1726 .
1727 . .section .plt
1728 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
1729
1730 The "reloc ()" notation is supposed to indicate that the linker emits
1731 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
1732 copying.
1733
1734 What are the difficulties here? Well, firstly, the relocations
1735 examined by the linker in check_relocs are against the function code
1736 sym .foo, while the dynamic relocation in the plt is emitted against
1737 the function descriptor symbol, foo. Somewhere along the line, we need
1738 to carefully copy dynamic link information from one symbol to the other.
1739 Secondly, the generic part of the elf linker will make .foo a dynamic
1740 symbol as is normal for most other backends. We need foo dynamic
1741 instead, at least for an application final link. However, when
1742 creating a shared library containing foo, we need to have both symbols
1743 dynamic so that references to .foo are satisfied during the early
1744 stages of linking. Otherwise the linker might decide to pull in a
1745 definition from some other object, eg. a static library. */
1746
1747 /* The linker needs to keep track of the number of relocs that it
1748 decides to copy as dynamic relocs in check_relocs for each symbol.
1749 This is so that it can later discard them if they are found to be
1750 unnecessary. We store the information in a field extending the
1751 regular ELF linker hash table. */
1752
1753 struct ppc_dyn_relocs
1754 {
1755 struct ppc_dyn_relocs *next;
1756
1757 /* The input section of the reloc. */
1758 asection *sec;
1759
1760 /* Total number of relocs copied for the input section. */
1761 bfd_size_type count;
1762
1763 /* Number of pc-relative relocs copied for the input section. */
1764 bfd_size_type pc_count;
1765 };
1766
1767 /* Of those relocs that might be copied as dynamic relocs, this macro
1768 selects between relative and absolute types. */
1769
1770 #define IS_ABSOLUTE_RELOC(RTYPE) \
1771 ((RTYPE) != R_PPC64_REL32 \
1772 && (RTYPE) != R_PPC64_REL64 \
1773 && (RTYPE) != R_PPC64_ADDR30)
1774
1775 /* Section name for stubs is the associated section name plus this
1776 string. */
1777 #define STUB_SUFFIX ".stub"
1778
1779 /* Linker stubs.
1780 ppc_stub_long_branch:
1781 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
1782 destination, but a 24 bit branch in a stub section will reach.
1783 . b dest
1784
1785 ppc_stub_plt_branch:
1786 Similar to the above, but a 24 bit branch in the stub section won't
1787 reach its destination.
1788 . addis %r12,%r2,xxx@ha
1789 . ld %r11,xxx@l(%r12)
1790 . mtctr %r11
1791 . bctr
1792
1793 ppc_stub_plt_call:
1794 Used to call a function in a shared library.
1795 . addis %r12,%r2,xxx@ha
1796 . std %r2,40(%r1)
1797 . ld %r11,xxx+0@l(%r12)
1798 . ld %r2,xxx+8@l(%r12)
1799 . mtctr %r11
1800 . ld %r11,xxx+16@l(%r12)
1801 . bctr
1802 */
1803
1804 enum ppc_stub_type {
1805 ppc_stub_none,
1806 ppc_stub_long_branch,
1807 ppc_stub_plt_branch,
1808 ppc_stub_plt_call
1809 };
1810
1811 struct ppc_stub_hash_entry {
1812
1813 /* Base hash table entry structure. */
1814 struct bfd_hash_entry root;
1815
1816 /* The stub section. */
1817 asection *stub_sec;
1818
1819 /* Offset within stub_sec of the beginning of this stub. */
1820 bfd_vma stub_offset;
1821
1822 /* Given the symbol's value and its section we can determine its final
1823 value when building the stubs (so the stub knows where to jump. */
1824 bfd_vma target_value;
1825 asection *target_section;
1826
1827 enum ppc_stub_type stub_type;
1828
1829 /* The symbol table entry, if any, that this was derived from. */
1830 struct ppc_link_hash_entry *h;
1831
1832 /* Where this stub is being called from, or, in the case of combined
1833 stub sections, the first input section in the group. */
1834 asection *id_sec;
1835 };
1836
1837 struct ppc_branch_hash_entry {
1838
1839 /* Base hash table entry structure. */
1840 struct bfd_hash_entry root;
1841
1842 /* Offset within .branch_lt. */
1843 unsigned int offset;
1844
1845 /* Generation marker. */
1846 unsigned int iter;
1847 };
1848
1849 struct ppc_link_hash_entry
1850 {
1851 struct elf_link_hash_entry elf;
1852
1853 /* A pointer to the most recently used stub hash entry against this
1854 symbol. */
1855 struct ppc_stub_hash_entry *stub_cache;
1856
1857 /* Track dynamic relocs copied for this symbol. */
1858 struct ppc_dyn_relocs *dyn_relocs;
1859
1860 /* Link between function code and descriptor symbols. */
1861 struct elf_link_hash_entry *oh;
1862
1863 /* Flag function code and descriptor symbols. */
1864 unsigned int is_func:1;
1865 unsigned int is_func_descriptor:1;
1866 unsigned int is_entry:1;
1867 };
1868
1869 /* ppc64 ELF linker hash table. */
1870
1871 struct ppc_link_hash_table
1872 {
1873 struct elf_link_hash_table elf;
1874
1875 /* The stub hash table. */
1876 struct bfd_hash_table stub_hash_table;
1877
1878 /* Another hash table for plt_branch stubs. */
1879 struct bfd_hash_table branch_hash_table;
1880
1881 /* Linker stub bfd. */
1882 bfd *stub_bfd;
1883
1884 /* Linker call-backs. */
1885 asection * (*add_stub_section) PARAMS ((const char *, asection *));
1886 void (*layout_sections_again) PARAMS ((void));
1887
1888 /* Array to keep track of which stub sections have been created, and
1889 information on stub grouping. */
1890 struct map_stub {
1891 /* This is the section to which stubs in the group will be attached. */
1892 asection *link_sec;
1893 /* The stub section. */
1894 asection *stub_sec;
1895 } *stub_group;
1896
1897 /* Assorted information used by ppc64_elf_size_stubs. */
1898 int top_index;
1899 asection **input_list;
1900
1901 /* Short-cuts to get to dynamic linker sections. */
1902 asection *sgot;
1903 asection *srelgot;
1904 asection *splt;
1905 asection *srelplt;
1906 asection *sdynbss;
1907 asection *srelbss;
1908 asection *sglink;
1909 asection *sfpr;
1910 asection *sbrlt;
1911 asection *srelbrlt;
1912
1913 /* Set on error. */
1914 unsigned int stub_error;
1915
1916 /* Flag set when small branches are detected. Used to
1917 select suitable defaults for the stub group size. */
1918 unsigned int has_14bit_branch;
1919
1920 /* Set if we detect a reference undefined weak symbol. */
1921 unsigned int have_undefweak;
1922
1923 /* Incremented every time we size stubs. */
1924 unsigned int stub_iteration;
1925
1926 /* Small local sym to section mapping cache. */
1927 struct sym_sec_cache sym_sec;
1928 };
1929
1930 static struct bfd_hash_entry *stub_hash_newfunc
1931 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1932 static struct bfd_hash_entry *branch_hash_newfunc
1933 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1934 static struct bfd_hash_entry *link_hash_newfunc
1935 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1936 static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
1937 PARAMS ((bfd *));
1938 static void ppc64_elf_link_hash_table_free
1939 PARAMS ((struct bfd_link_hash_table *));
1940 static char *ppc_stub_name
1941 PARAMS ((const asection *, const asection *,
1942 const struct ppc_link_hash_entry *, const Elf_Internal_Rela *));
1943 static struct ppc_stub_hash_entry *ppc_get_stub_entry
1944 PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *,
1945 const Elf_Internal_Rela *, struct ppc_link_hash_table *));
1946 static struct ppc_stub_hash_entry *ppc_add_stub
1947 PARAMS ((const char *, asection *, struct ppc_link_hash_table *));
1948 static boolean create_linkage_sections
1949 PARAMS ((bfd *, struct bfd_link_info *));
1950 static boolean create_got_section
1951 PARAMS ((bfd *, struct bfd_link_info *));
1952 static boolean ppc64_elf_create_dynamic_sections
1953 PARAMS ((bfd *, struct bfd_link_info *));
1954 static void ppc64_elf_copy_indirect_symbol
1955 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
1956 struct elf_link_hash_entry *));
1957 static boolean ppc64_elf_check_relocs
1958 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1959 const Elf_Internal_Rela *));
1960 static asection * ppc64_elf_gc_mark_hook
1961 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
1962 struct elf_link_hash_entry *, Elf_Internal_Sym *));
1963 static boolean ppc64_elf_gc_sweep_hook
1964 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1965 const Elf_Internal_Rela *));
1966 static boolean func_desc_adjust
1967 PARAMS ((struct elf_link_hash_entry *, PTR));
1968 static boolean ppc64_elf_func_desc_adjust
1969 PARAMS ((bfd *, struct bfd_link_info *));
1970 static boolean ppc64_elf_adjust_dynamic_symbol
1971 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
1972 static void ppc64_elf_hide_symbol
1973 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
1974 static boolean edit_opd
1975 PARAMS ((bfd *, struct bfd_link_info *));
1976 static boolean allocate_dynrelocs
1977 PARAMS ((struct elf_link_hash_entry *, PTR));
1978 static boolean readonly_dynrelocs
1979 PARAMS ((struct elf_link_hash_entry *, PTR));
1980 static enum elf_reloc_type_class ppc64_elf_reloc_type_class
1981 PARAMS ((const Elf_Internal_Rela *));
1982 static boolean ppc64_elf_size_dynamic_sections
1983 PARAMS ((bfd *, struct bfd_link_info *));
1984 static INLINE enum ppc_stub_type ppc_type_of_stub
1985 PARAMS ((asection *, const Elf_Internal_Rela *,
1986 struct ppc_link_hash_entry **, bfd_vma));
1987 static bfd_byte *build_plt_stub
1988 PARAMS ((bfd *, bfd_byte *, int, int));
1989 static boolean ppc_build_one_stub
1990 PARAMS ((struct bfd_hash_entry *, PTR));
1991 static boolean ppc_size_one_stub
1992 PARAMS ((struct bfd_hash_entry *, PTR));
1993 static void group_sections
1994 PARAMS ((struct ppc_link_hash_table *, bfd_size_type, boolean));
1995 static boolean ppc64_elf_relocate_section
1996 PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
1997 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
1998 asection **));
1999 static boolean ppc64_elf_finish_dynamic_symbol
2000 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
2001 Elf_Internal_Sym *));
2002 static boolean ppc64_elf_finish_dynamic_sections
2003 PARAMS ((bfd *, struct bfd_link_info *));
2004
2005 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2006
2007 #define ppc_hash_table(p) \
2008 ((struct ppc_link_hash_table *) ((p)->hash))
2009
2010 #define ppc_stub_hash_lookup(table, string, create, copy) \
2011 ((struct ppc_stub_hash_entry *) \
2012 bfd_hash_lookup ((table), (string), (create), (copy)))
2013
2014 #define ppc_branch_hash_lookup(table, string, create, copy) \
2015 ((struct ppc_branch_hash_entry *) \
2016 bfd_hash_lookup ((table), (string), (create), (copy)))
2017
2018 /* Create an entry in the stub hash table. */
2019
2020 static struct bfd_hash_entry *
2021 stub_hash_newfunc (entry, table, string)
2022 struct bfd_hash_entry *entry;
2023 struct bfd_hash_table *table;
2024 const char *string;
2025 {
2026 /* Allocate the structure if it has not already been allocated by a
2027 subclass. */
2028 if (entry == NULL)
2029 {
2030 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2031 if (entry == NULL)
2032 return entry;
2033 }
2034
2035 /* Call the allocation method of the superclass. */
2036 entry = bfd_hash_newfunc (entry, table, string);
2037 if (entry != NULL)
2038 {
2039 struct ppc_stub_hash_entry *eh;
2040
2041 /* Initialize the local fields. */
2042 eh = (struct ppc_stub_hash_entry *) entry;
2043 eh->stub_sec = NULL;
2044 eh->stub_offset = 0;
2045 eh->target_value = 0;
2046 eh->target_section = NULL;
2047 eh->stub_type = ppc_stub_none;
2048 eh->h = NULL;
2049 eh->id_sec = NULL;
2050 }
2051
2052 return entry;
2053 }
2054
2055 /* Create an entry in the branch hash table. */
2056
2057 static struct bfd_hash_entry *
2058 branch_hash_newfunc (entry, table, string)
2059 struct bfd_hash_entry *entry;
2060 struct bfd_hash_table *table;
2061 const char *string;
2062 {
2063 /* Allocate the structure if it has not already been allocated by a
2064 subclass. */
2065 if (entry == NULL)
2066 {
2067 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2068 if (entry == NULL)
2069 return entry;
2070 }
2071
2072 /* Call the allocation method of the superclass. */
2073 entry = bfd_hash_newfunc (entry, table, string);
2074 if (entry != NULL)
2075 {
2076 struct ppc_branch_hash_entry *eh;
2077
2078 /* Initialize the local fields. */
2079 eh = (struct ppc_branch_hash_entry *) entry;
2080 eh->offset = 0;
2081 eh->iter = 0;
2082 }
2083
2084 return entry;
2085 }
2086
2087 /* Create an entry in a ppc64 ELF linker hash table. */
2088
2089 static struct bfd_hash_entry *
2090 link_hash_newfunc (entry, table, string)
2091 struct bfd_hash_entry *entry;
2092 struct bfd_hash_table *table;
2093 const char *string;
2094 {
2095 /* Allocate the structure if it has not already been allocated by a
2096 subclass. */
2097 if (entry == NULL)
2098 {
2099 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2100 if (entry == NULL)
2101 return entry;
2102 }
2103
2104 /* Call the allocation method of the superclass. */
2105 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2106 if (entry != NULL)
2107 {
2108 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2109
2110 eh->stub_cache = NULL;
2111 eh->dyn_relocs = NULL;
2112 eh->oh = NULL;
2113 eh->is_func = 0;
2114 eh->is_func_descriptor = 0;
2115 eh->is_entry = 0;
2116 }
2117
2118 return entry;
2119 }
2120
2121 /* Create a ppc64 ELF linker hash table. */
2122
2123 static struct bfd_link_hash_table *
2124 ppc64_elf_link_hash_table_create (abfd)
2125 bfd *abfd;
2126 {
2127 struct ppc_link_hash_table *htab;
2128 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2129
2130 htab = (struct ppc_link_hash_table *) bfd_malloc (amt);
2131 if (htab == NULL)
2132 return NULL;
2133
2134 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2135 {
2136 free (htab);
2137 return NULL;
2138 }
2139
2140 /* Init the stub hash table too. */
2141 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
2142 return NULL;
2143
2144 /* And the branch hash table. */
2145 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
2146 return NULL;
2147
2148 htab->stub_bfd = NULL;
2149 htab->add_stub_section = NULL;
2150 htab->layout_sections_again = NULL;
2151 htab->stub_group = NULL;
2152 htab->sgot = NULL;
2153 htab->srelgot = NULL;
2154 htab->splt = NULL;
2155 htab->srelplt = NULL;
2156 htab->sdynbss = NULL;
2157 htab->srelbss = NULL;
2158 htab->sglink = NULL;
2159 htab->sfpr = NULL;
2160 htab->sbrlt = NULL;
2161 htab->srelbrlt = NULL;
2162 htab->stub_error = 0;
2163 htab->has_14bit_branch = 0;
2164 htab->have_undefweak = 0;
2165 htab->stub_iteration = 0;
2166 htab->sym_sec.abfd = NULL;
2167
2168 return &htab->elf.root;
2169 }
2170
2171 /* Free the derived linker hash table. */
2172
2173 static void
2174 ppc64_elf_link_hash_table_free (hash)
2175 struct bfd_link_hash_table *hash;
2176 {
2177 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
2178
2179 bfd_hash_table_free (&ret->stub_hash_table);
2180 bfd_hash_table_free (&ret->branch_hash_table);
2181 _bfd_generic_link_hash_table_free (hash);
2182 }
2183
2184 /* Build a name for an entry in the stub hash table. */
2185
2186 static char *
2187 ppc_stub_name (input_section, sym_sec, h, rel)
2188 const asection *input_section;
2189 const asection *sym_sec;
2190 const struct ppc_link_hash_entry *h;
2191 const Elf_Internal_Rela *rel;
2192 {
2193 char *stub_name;
2194 bfd_size_type len;
2195
2196 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
2197 offsets from a sym as a branch target? In fact, we could
2198 probably assume the addend is always zero. */
2199 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
2200
2201 if (h)
2202 {
2203 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
2204 stub_name = bfd_malloc (len);
2205 if (stub_name != NULL)
2206 {
2207 sprintf (stub_name, "%08x_%s+%x",
2208 input_section->id & 0xffffffff,
2209 h->elf.root.root.string,
2210 (int) rel->r_addend & 0xffffffff);
2211 }
2212 }
2213 else
2214 {
2215 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2216 stub_name = bfd_malloc (len);
2217 if (stub_name != NULL)
2218 {
2219 sprintf (stub_name, "%08x_%x:%x+%x",
2220 input_section->id & 0xffffffff,
2221 sym_sec->id & 0xffffffff,
2222 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
2223 (int) rel->r_addend & 0xffffffff);
2224 }
2225 }
2226 return stub_name;
2227 }
2228
2229 /* Look up an entry in the stub hash. Stub entries are cached because
2230 creating the stub name takes a bit of time. */
2231
2232 static struct ppc_stub_hash_entry *
2233 ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab)
2234 const asection *input_section;
2235 const asection *sym_sec;
2236 struct elf_link_hash_entry *hash;
2237 const Elf_Internal_Rela *rel;
2238 struct ppc_link_hash_table *htab;
2239 {
2240 struct ppc_stub_hash_entry *stub_entry;
2241 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
2242 const asection *id_sec;
2243
2244 /* If this input section is part of a group of sections sharing one
2245 stub section, then use the id of the first section in the group.
2246 Stub names need to include a section id, as there may well be
2247 more than one stub used to reach say, printf, and we need to
2248 distinguish between them. */
2249 id_sec = htab->stub_group[input_section->id].link_sec;
2250
2251 if (h != NULL && h->stub_cache != NULL
2252 && h->stub_cache->h == h
2253 && h->stub_cache->id_sec == id_sec)
2254 {
2255 stub_entry = h->stub_cache;
2256 }
2257 else
2258 {
2259 char *stub_name;
2260
2261 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
2262 if (stub_name == NULL)
2263 return NULL;
2264
2265 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
2266 stub_name, false, false);
2267 if (h != NULL)
2268 h->stub_cache = stub_entry;
2269
2270 free (stub_name);
2271 }
2272
2273 return stub_entry;
2274 }
2275
2276 /* Add a new stub entry to the stub hash. Not all fields of the new
2277 stub entry are initialised. */
2278
2279 static struct ppc_stub_hash_entry *
2280 ppc_add_stub (stub_name, section, htab)
2281 const char *stub_name;
2282 asection *section;
2283 struct ppc_link_hash_table *htab;
2284 {
2285 asection *link_sec;
2286 asection *stub_sec;
2287 struct ppc_stub_hash_entry *stub_entry;
2288
2289 link_sec = htab->stub_group[section->id].link_sec;
2290 stub_sec = htab->stub_group[section->id].stub_sec;
2291 if (stub_sec == NULL)
2292 {
2293 stub_sec = htab->stub_group[link_sec->id].stub_sec;
2294 if (stub_sec == NULL)
2295 {
2296 size_t namelen;
2297 bfd_size_type len;
2298 char *s_name;
2299
2300 namelen = strlen (link_sec->name);
2301 len = namelen + sizeof (STUB_SUFFIX);
2302 s_name = bfd_alloc (htab->stub_bfd, len);
2303 if (s_name == NULL)
2304 return NULL;
2305
2306 memcpy (s_name, link_sec->name, namelen);
2307 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2308 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
2309 if (stub_sec == NULL)
2310 return NULL;
2311 htab->stub_group[link_sec->id].stub_sec = stub_sec;
2312 }
2313 htab->stub_group[section->id].stub_sec = stub_sec;
2314 }
2315
2316 /* Enter this entry into the linker stub hash table. */
2317 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2318 true, false);
2319 if (stub_entry == NULL)
2320 {
2321 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2322 bfd_archive_filename (section->owner),
2323 stub_name);
2324 return NULL;
2325 }
2326
2327 stub_entry->stub_sec = stub_sec;
2328 stub_entry->stub_offset = 0;
2329 stub_entry->id_sec = link_sec;
2330 return stub_entry;
2331 }
2332
2333 /* Create sections for linker generated code. */
2334
2335 static boolean
2336 create_linkage_sections (dynobj, info)
2337 bfd *dynobj;
2338 struct bfd_link_info *info;
2339 {
2340 struct ppc_link_hash_table *htab;
2341 flagword flags;
2342
2343 htab = ppc_hash_table (info);
2344
2345 /* Create .sfpr for code to save and restore fp regs. */
2346 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
2347 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2348 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
2349 if (htab->sfpr == NULL
2350 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
2351 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
2352 return false;
2353
2354 /* Create .glink for lazy dynamic linking support. */
2355 htab->sglink = bfd_make_section_anyway (dynobj, ".glink");
2356 if (htab->sglink == NULL
2357 || ! bfd_set_section_flags (dynobj, htab->sglink, flags)
2358 || ! bfd_set_section_alignment (dynobj, htab->sglink, 2))
2359 return false;
2360
2361 /* Create .branch_lt for plt_branch stubs. */
2362 flags = (SEC_ALLOC | SEC_LOAD
2363 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2364 htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt");
2365 if (htab->sbrlt == NULL
2366 || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags)
2367 || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3))
2368 return false;
2369
2370 if (info->shared)
2371 {
2372 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
2373 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2374 htab->srelbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
2375 if (!htab->srelbrlt
2376 || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags)
2377 || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3))
2378 return false;
2379 }
2380 return true;
2381 }
2382
2383 /* Create .got and .rela.got sections in DYNOBJ, and set up
2384 shortcuts to them in our hash table. */
2385
2386 static boolean
2387 create_got_section (dynobj, info)
2388 bfd *dynobj;
2389 struct bfd_link_info *info;
2390 {
2391 struct ppc_link_hash_table *htab;
2392
2393 if (! _bfd_elf_create_got_section (dynobj, info))
2394 return false;
2395
2396 htab = ppc_hash_table (info);
2397 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2398 if (!htab->sgot)
2399 abort ();
2400
2401 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
2402 if (!htab->srelgot
2403 || ! bfd_set_section_flags (dynobj, htab->srelgot,
2404 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2405 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2406 | SEC_READONLY))
2407 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
2408 return false;
2409 return true;
2410 }
2411
2412 /* Create the dynamic sections, and set up shortcuts. */
2413
2414 static boolean
2415 ppc64_elf_create_dynamic_sections (dynobj, info)
2416 bfd *dynobj;
2417 struct bfd_link_info *info;
2418 {
2419 struct ppc_link_hash_table *htab;
2420
2421 htab = ppc_hash_table (info);
2422 if (!htab->sgot && !create_got_section (dynobj, info))
2423 return false;
2424
2425 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2426 return false;
2427
2428 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2429 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
2430 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2431 if (!info->shared)
2432 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
2433
2434 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2435 || (!info->shared && !htab->srelbss))
2436 abort ();
2437
2438 return true;
2439 }
2440
2441 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2442
2443 static void
2444 ppc64_elf_copy_indirect_symbol (bed, dir, ind)
2445 struct elf_backend_data *bed;
2446 struct elf_link_hash_entry *dir, *ind;
2447 {
2448 struct ppc_link_hash_entry *edir, *eind;
2449
2450 edir = (struct ppc_link_hash_entry *) dir;
2451 eind = (struct ppc_link_hash_entry *) ind;
2452
2453 if (eind->dyn_relocs != NULL)
2454 {
2455 if (edir->dyn_relocs != NULL)
2456 {
2457 struct ppc_dyn_relocs **pp;
2458 struct ppc_dyn_relocs *p;
2459
2460 if (ind->root.type == bfd_link_hash_indirect)
2461 abort ();
2462
2463 /* Add reloc counts against the weak sym to the strong sym
2464 list. Merge any entries against the same section. */
2465 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2466 {
2467 struct ppc_dyn_relocs *q;
2468
2469 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2470 if (q->sec == p->sec)
2471 {
2472 q->pc_count += p->pc_count;
2473 q->count += p->count;
2474 *pp = p->next;
2475 break;
2476 }
2477 if (q == NULL)
2478 pp = &p->next;
2479 }
2480 *pp = edir->dyn_relocs;
2481 }
2482
2483 edir->dyn_relocs = eind->dyn_relocs;
2484 eind->dyn_relocs = NULL;
2485 }
2486
2487 edir->is_func |= eind->is_func;
2488 edir->is_func_descriptor |= eind->is_func_descriptor;
2489 edir->is_entry |= eind->is_entry;
2490
2491 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
2492 }
2493
2494 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
2495 symbols undefined on the command-line. */
2496
2497 boolean
2498 ppc64_elf_mark_entry_syms (info)
2499 struct bfd_link_info *info;
2500 {
2501 struct ppc_link_hash_table *htab;
2502 struct bfd_sym_chain *sym;
2503
2504 htab = ppc_hash_table (info);
2505 for (sym = info->gc_sym_list; sym; sym = sym->next)
2506 {
2507 struct elf_link_hash_entry *h;
2508
2509 h = elf_link_hash_lookup (&htab->elf, sym->name, false, false, false);
2510 if (h != NULL)
2511 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
2512 }
2513 return true;
2514 }
2515
2516 /* Look through the relocs for a section during the first phase, and
2517 calculate needed space in the global offset table, procedure
2518 linkage table, and dynamic reloc sections. */
2519
2520 static boolean
2521 ppc64_elf_check_relocs (abfd, info, sec, relocs)
2522 bfd *abfd;
2523 struct bfd_link_info *info;
2524 asection *sec;
2525 const Elf_Internal_Rela *relocs;
2526 {
2527 struct ppc_link_hash_table *htab;
2528 Elf_Internal_Shdr *symtab_hdr;
2529 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2530 const Elf_Internal_Rela *rel;
2531 const Elf_Internal_Rela *rel_end;
2532 asection *sreloc;
2533 asection **opd_sym_map;
2534
2535 if (info->relocateable)
2536 return true;
2537
2538 htab = ppc_hash_table (info);
2539 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2540
2541 sym_hashes = elf_sym_hashes (abfd);
2542 sym_hashes_end = (sym_hashes
2543 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
2544 - symtab_hdr->sh_info);
2545
2546 sreloc = NULL;
2547 opd_sym_map = NULL;
2548 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
2549 {
2550 /* Garbage collection needs some extra help with .opd sections.
2551 We don't want to necessarily keep everything referenced by
2552 relocs in .opd, as that would keep all functions. Instead,
2553 if we reference an .opd symbol (a function descriptor), we
2554 want to keep the function code symbol's section. This is
2555 easy for global symbols, but for local syms we need to keep
2556 information about the associated function section. Later, if
2557 edit_opd deletes entries, we'll use this array to adjust
2558 local syms in .opd. */
2559 union opd_info {
2560 asection *func_section;
2561 long entry_adjust;
2562 };
2563 bfd_size_type amt;
2564
2565 amt = sec->_raw_size * sizeof (union opd_info) / 24;
2566 opd_sym_map = (asection **) bfd_zalloc (abfd, amt);
2567 if (opd_sym_map == NULL)
2568 return false;
2569 elf_section_data (sec)->tdata = opd_sym_map;
2570 }
2571
2572 if (htab->elf.dynobj == NULL)
2573 htab->elf.dynobj = abfd;
2574 if (htab->sfpr == NULL
2575 && !create_linkage_sections (htab->elf.dynobj, info))
2576 return false;
2577
2578 rel_end = relocs + sec->reloc_count;
2579 for (rel = relocs; rel < rel_end; rel++)
2580 {
2581 unsigned long r_symndx;
2582 struct elf_link_hash_entry *h;
2583 enum elf_ppc_reloc_type r_type;
2584
2585 r_symndx = ELF64_R_SYM (rel->r_info);
2586 if (r_symndx < symtab_hdr->sh_info)
2587 h = NULL;
2588 else
2589 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2590
2591 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2592 switch (r_type)
2593 {
2594 /* GOT16 relocations */
2595 case R_PPC64_GOT16:
2596 case R_PPC64_GOT16_DS:
2597 case R_PPC64_GOT16_HA:
2598 case R_PPC64_GOT16_HI:
2599 case R_PPC64_GOT16_LO:
2600 case R_PPC64_GOT16_LO_DS:
2601
2602 /* This symbol requires a global offset table entry. */
2603 if (htab->sgot == NULL
2604 && !create_got_section (htab->elf.dynobj, info))
2605 return false;
2606
2607 if (h != NULL)
2608 {
2609 h->got.refcount += 1;
2610 }
2611 else
2612 {
2613 bfd_signed_vma *local_got_refcounts;
2614
2615 /* This is a global offset table entry for a local symbol. */
2616 local_got_refcounts = elf_local_got_refcounts (abfd);
2617 if (local_got_refcounts == NULL)
2618 {
2619 bfd_size_type size;
2620
2621 size = symtab_hdr->sh_info;
2622 size *= sizeof (bfd_signed_vma);
2623 local_got_refcounts = ((bfd_signed_vma *)
2624 bfd_zalloc (abfd, size));
2625 if (local_got_refcounts == NULL)
2626 return false;
2627 elf_local_got_refcounts (abfd) = local_got_refcounts;
2628 }
2629 local_got_refcounts[r_symndx] += 1;
2630 }
2631 break;
2632
2633 case R_PPC64_PLT16_HA:
2634 case R_PPC64_PLT16_HI:
2635 case R_PPC64_PLT16_LO:
2636 case R_PPC64_PLT32:
2637 case R_PPC64_PLT64:
2638 /* This symbol requires a procedure linkage table entry. We
2639 actually build the entry in adjust_dynamic_symbol,
2640 because this might be a case of linking PIC code without
2641 linking in any dynamic objects, in which case we don't
2642 need to generate a procedure linkage table after all. */
2643 if (h == NULL)
2644 {
2645 /* It does not make sense to have a procedure linkage
2646 table entry for a local symbol. */
2647 bfd_set_error (bfd_error_bad_value);
2648 return false;
2649 }
2650
2651 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2652 h->plt.refcount += 1;
2653 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2654 break;
2655
2656 /* The following relocations don't need to propagate the
2657 relocation if linking a shared object since they are
2658 section relative. */
2659 case R_PPC64_SECTOFF:
2660 case R_PPC64_SECTOFF_LO:
2661 case R_PPC64_SECTOFF_HI:
2662 case R_PPC64_SECTOFF_HA:
2663 case R_PPC64_SECTOFF_DS:
2664 case R_PPC64_SECTOFF_LO_DS:
2665 case R_PPC64_TOC16:
2666 case R_PPC64_TOC16_LO:
2667 case R_PPC64_TOC16_HI:
2668 case R_PPC64_TOC16_HA:
2669 case R_PPC64_TOC16_DS:
2670 case R_PPC64_TOC16_LO_DS:
2671 break;
2672
2673 /* This relocation describes the C++ object vtable hierarchy.
2674 Reconstruct it for later use during GC. */
2675 case R_PPC64_GNU_VTINHERIT:
2676 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2677 return false;
2678 break;
2679
2680 /* This relocation describes which C++ vtable entries are actually
2681 used. Record for later use during GC. */
2682 case R_PPC64_GNU_VTENTRY:
2683 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2684 return false;
2685 break;
2686
2687 case R_PPC64_REL14:
2688 case R_PPC64_REL14_BRTAKEN:
2689 case R_PPC64_REL14_BRNTAKEN:
2690 htab->has_14bit_branch = 1;
2691 /* Fall through. */
2692
2693 case R_PPC64_REL24:
2694 if (h != NULL
2695 && h->root.root.string[0] == '.'
2696 && h->root.root.string[1] != 0)
2697 {
2698 /* We may need a .plt entry if the function this reloc
2699 refers to is in a shared lib. */
2700 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2701 h->plt.refcount += 1;
2702 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2703 }
2704 break;
2705
2706 case R_PPC64_ADDR64:
2707 if (opd_sym_map != NULL
2708 && h != NULL
2709 && h->root.root.string[0] == '.'
2710 && h->root.root.string[1] != 0)
2711 {
2712 struct elf_link_hash_entry *fdh;
2713
2714 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
2715 false, false, false);
2716 if (fdh != NULL)
2717 {
2718 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
2719 ((struct ppc_link_hash_entry *) fdh)->oh = h;
2720 ((struct ppc_link_hash_entry *) h)->is_func = 1;
2721 ((struct ppc_link_hash_entry *) h)->oh = fdh;
2722 }
2723 }
2724 if (opd_sym_map != NULL
2725 && h == NULL
2726 && rel + 1 < rel_end
2727 && ((enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info)
2728 == R_PPC64_TOC))
2729 {
2730 asection *s;
2731
2732 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
2733 r_symndx);
2734 if (s == NULL)
2735 return false;
2736 else if (s != sec)
2737 opd_sym_map[rel->r_offset / 24] = s;
2738 }
2739 /* Fall through. */
2740
2741 case R_PPC64_REL64:
2742 case R_PPC64_REL32:
2743 case R_PPC64_ADDR14:
2744 case R_PPC64_ADDR14_BRNTAKEN:
2745 case R_PPC64_ADDR14_BRTAKEN:
2746 case R_PPC64_ADDR16:
2747 case R_PPC64_ADDR16_DS:
2748 case R_PPC64_ADDR16_HA:
2749 case R_PPC64_ADDR16_HI:
2750 case R_PPC64_ADDR16_HIGHER:
2751 case R_PPC64_ADDR16_HIGHERA:
2752 case R_PPC64_ADDR16_HIGHEST:
2753 case R_PPC64_ADDR16_HIGHESTA:
2754 case R_PPC64_ADDR16_LO:
2755 case R_PPC64_ADDR16_LO_DS:
2756 case R_PPC64_ADDR24:
2757 case R_PPC64_ADDR30:
2758 case R_PPC64_ADDR32:
2759 case R_PPC64_UADDR16:
2760 case R_PPC64_UADDR32:
2761 case R_PPC64_UADDR64:
2762 case R_PPC64_TOC:
2763 /* Don't propagate .opd relocs. */
2764 if (NO_OPD_RELOCS && opd_sym_map != NULL)
2765 break;
2766
2767 /* If we are creating a shared library, and this is a reloc
2768 against a global symbol, or a non PC relative reloc
2769 against a local symbol, then we need to copy the reloc
2770 into the shared library. However, if we are linking with
2771 -Bsymbolic, we do not need to copy a reloc against a
2772 global symbol which is defined in an object we are
2773 including in the link (i.e., DEF_REGULAR is set). At
2774 this point we have not seen all the input files, so it is
2775 possible that DEF_REGULAR is not set now but will be set
2776 later (it is never cleared). In case of a weak definition,
2777 DEF_REGULAR may be cleared later by a strong definition in
2778 a shared library. We account for that possibility below by
2779 storing information in the relocs_copied field of the hash
2780 table entry. A similar situation occurs when creating
2781 shared libraries and symbol visibility changes render the
2782 symbol local.
2783
2784 If on the other hand, we are creating an executable, we
2785 may need to keep relocations for symbols satisfied by a
2786 dynamic library if we manage to avoid copy relocs for the
2787 symbol. */
2788 if ((info->shared
2789 && (sec->flags & SEC_ALLOC) != 0
2790 && (IS_ABSOLUTE_RELOC (r_type)
2791 || (h != NULL
2792 && (! info->symbolic
2793 || h->root.type == bfd_link_hash_defweak
2794 || (h->elf_link_hash_flags
2795 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2796 || (!info->shared
2797 && (sec->flags & SEC_ALLOC) != 0
2798 && h != NULL
2799 && (h->root.type == bfd_link_hash_defweak
2800 || (h->elf_link_hash_flags
2801 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
2802 {
2803 struct ppc_dyn_relocs *p;
2804 struct ppc_dyn_relocs **head;
2805
2806 /* We must copy these reloc types into the output file.
2807 Create a reloc section in dynobj and make room for
2808 this reloc. */
2809 if (sreloc == NULL)
2810 {
2811 const char *name;
2812 bfd *dynobj;
2813
2814 name = (bfd_elf_string_from_elf_section
2815 (abfd,
2816 elf_elfheader (abfd)->e_shstrndx,
2817 elf_section_data (sec)->rel_hdr.sh_name));
2818 if (name == NULL)
2819 return false;
2820
2821 if (strncmp (name, ".rela", 5) != 0
2822 || strcmp (bfd_get_section_name (abfd, sec),
2823 name + 5) != 0)
2824 {
2825 (*_bfd_error_handler)
2826 (_("%s: bad relocation section name `%s\'"),
2827 bfd_archive_filename (abfd), name);
2828 bfd_set_error (bfd_error_bad_value);
2829 }
2830
2831 dynobj = htab->elf.dynobj;
2832 sreloc = bfd_get_section_by_name (dynobj, name);
2833 if (sreloc == NULL)
2834 {
2835 flagword flags;
2836
2837 sreloc = bfd_make_section (dynobj, name);
2838 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2839 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2840 if ((sec->flags & SEC_ALLOC) != 0)
2841 flags |= SEC_ALLOC | SEC_LOAD;
2842 if (sreloc == NULL
2843 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2844 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
2845 return false;
2846 }
2847 elf_section_data (sec)->sreloc = sreloc;
2848 }
2849
2850 /* If this is a global symbol, we count the number of
2851 relocations we need for this symbol. */
2852 if (h != NULL)
2853 {
2854 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
2855 }
2856 else
2857 {
2858 /* Track dynamic relocs needed for local syms too.
2859 We really need local syms available to do this
2860 easily. Oh well. */
2861
2862 asection *s;
2863 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
2864 sec, r_symndx);
2865 if (s == NULL)
2866 return false;
2867
2868 head = ((struct ppc_dyn_relocs **)
2869 &elf_section_data (s)->local_dynrel);
2870 }
2871
2872 p = *head;
2873 if (p == NULL || p->sec != sec)
2874 {
2875 p = ((struct ppc_dyn_relocs *)
2876 bfd_alloc (htab->elf.dynobj,
2877 (bfd_size_type) sizeof *p));
2878 if (p == NULL)
2879 return false;
2880 p->next = *head;
2881 *head = p;
2882 p->sec = sec;
2883 p->count = 0;
2884 p->pc_count = 0;
2885 }
2886
2887 p->count += 1;
2888 if (!IS_ABSOLUTE_RELOC (r_type))
2889 p->pc_count += 1;
2890 }
2891 break;
2892
2893 default:
2894 break;
2895 }
2896 }
2897
2898 return true;
2899 }
2900
2901 /* Return the section that should be marked against GC for a given
2902 relocation. */
2903
2904 static asection *
2905 ppc64_elf_gc_mark_hook (sec, info, rel, h, sym)
2906 asection *sec;
2907 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2908 Elf_Internal_Rela *rel;
2909 struct elf_link_hash_entry *h;
2910 Elf_Internal_Sym *sym;
2911 {
2912 asection *rsec = NULL;
2913
2914 if (h != NULL)
2915 {
2916 enum elf_ppc_reloc_type r_type;
2917 struct ppc_link_hash_entry *fdh;
2918
2919 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
2920 switch (r_type)
2921 {
2922 case R_PPC64_GNU_VTINHERIT:
2923 case R_PPC64_GNU_VTENTRY:
2924 break;
2925
2926 default:
2927 switch (h->root.type)
2928 {
2929 case bfd_link_hash_defined:
2930 case bfd_link_hash_defweak:
2931 fdh = (struct ppc_link_hash_entry *) h;
2932
2933 /* Function descriptor syms cause the associated
2934 function code sym section to be marked. */
2935 if (fdh->is_func_descriptor)
2936 rsec = fdh->oh->root.u.def.section;
2937
2938 /* Function entry syms return NULL if they are in .opd
2939 and are not ._start (or others undefined on the ld
2940 command line). Thus we avoid marking all function
2941 sections, as all functions are referenced in .opd. */
2942 else if ((fdh->oh != NULL
2943 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
2944 || elf_section_data (sec)->tdata == NULL)
2945 rsec = h->root.u.def.section;
2946 break;
2947
2948 case bfd_link_hash_common:
2949 rsec = h->root.u.c.p->section;
2950 break;
2951
2952 default:
2953 break;
2954 }
2955 }
2956 }
2957 else
2958 {
2959 asection **opd_sym_section;
2960
2961 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
2962 opd_sym_section = (asection **) elf_section_data (rsec)->tdata;
2963 if (opd_sym_section != NULL)
2964 rsec = opd_sym_section[sym->st_value / 24];
2965 else if (elf_section_data (sec)->tdata != NULL)
2966 rsec = NULL;
2967 }
2968
2969 return rsec;
2970 }
2971
2972 /* Update the .got, .plt. and dynamic reloc reference counts for the
2973 section being removed. */
2974
2975 static boolean
2976 ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
2977 bfd *abfd;
2978 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2979 asection *sec;
2980 const Elf_Internal_Rela *relocs;
2981 {
2982 Elf_Internal_Shdr *symtab_hdr;
2983 struct elf_link_hash_entry **sym_hashes;
2984 bfd_signed_vma *local_got_refcounts;
2985 const Elf_Internal_Rela *rel, *relend;
2986
2987 elf_section_data (sec)->local_dynrel = NULL;
2988
2989 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2990 sym_hashes = elf_sym_hashes (abfd);
2991 local_got_refcounts = elf_local_got_refcounts (abfd);
2992
2993 relend = relocs + sec->reloc_count;
2994 for (rel = relocs; rel < relend; rel++)
2995 {
2996 unsigned long r_symndx;
2997 enum elf_ppc_reloc_type r_type;
2998 struct elf_link_hash_entry *h;
2999
3000 r_symndx = ELF64_R_SYM (rel->r_info);
3001 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
3002 switch (r_type)
3003 {
3004 case R_PPC64_GOT16:
3005 case R_PPC64_GOT16_DS:
3006 case R_PPC64_GOT16_HA:
3007 case R_PPC64_GOT16_HI:
3008 case R_PPC64_GOT16_LO:
3009 case R_PPC64_GOT16_LO_DS:
3010 if (r_symndx >= symtab_hdr->sh_info)
3011 {
3012 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3013 if (h->got.refcount > 0)
3014 h->got.refcount--;
3015 }
3016 else
3017 {
3018 if (local_got_refcounts[r_symndx] > 0)
3019 local_got_refcounts[r_symndx]--;
3020 }
3021 break;
3022
3023 case R_PPC64_PLT16_HA:
3024 case R_PPC64_PLT16_HI:
3025 case R_PPC64_PLT16_LO:
3026 case R_PPC64_PLT32:
3027 case R_PPC64_PLT64:
3028 if (r_symndx >= symtab_hdr->sh_info)
3029 {
3030 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3031 if (h->plt.refcount > 0)
3032 h->plt.refcount--;
3033 }
3034 break;
3035
3036 case R_PPC64_REL14:
3037 case R_PPC64_REL14_BRNTAKEN:
3038 case R_PPC64_REL14_BRTAKEN:
3039 case R_PPC64_REL24:
3040 if (r_symndx >= symtab_hdr->sh_info)
3041 {
3042 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3043 if (h->plt.refcount > 0)
3044 h->plt.refcount--;
3045 }
3046 break;
3047
3048 case R_PPC64_REL32:
3049 case R_PPC64_REL64:
3050 if (r_symndx >= symtab_hdr->sh_info)
3051 {
3052 struct ppc_link_hash_entry *eh;
3053 struct ppc_dyn_relocs **pp;
3054 struct ppc_dyn_relocs *p;
3055
3056 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3057 eh = (struct ppc_link_hash_entry *) h;
3058
3059 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3060 if (p->sec == sec)
3061 {
3062 p->pc_count -= 1;
3063 p->count -= 1;
3064 if (p->count == 0)
3065 *pp = p->next;
3066 break;
3067 }
3068 }
3069 break;
3070
3071 case R_PPC64_ADDR14:
3072 case R_PPC64_ADDR14_BRNTAKEN:
3073 case R_PPC64_ADDR14_BRTAKEN:
3074 case R_PPC64_ADDR16:
3075 case R_PPC64_ADDR16_DS:
3076 case R_PPC64_ADDR16_HA:
3077 case R_PPC64_ADDR16_HI:
3078 case R_PPC64_ADDR16_HIGHER:
3079 case R_PPC64_ADDR16_HIGHERA:
3080 case R_PPC64_ADDR16_HIGHEST:
3081 case R_PPC64_ADDR16_HIGHESTA:
3082 case R_PPC64_ADDR16_LO:
3083 case R_PPC64_ADDR16_LO_DS:
3084 case R_PPC64_ADDR24:
3085 case R_PPC64_ADDR30:
3086 case R_PPC64_ADDR32:
3087 case R_PPC64_ADDR64:
3088 case R_PPC64_UADDR16:
3089 case R_PPC64_UADDR32:
3090 case R_PPC64_UADDR64:
3091 case R_PPC64_TOC:
3092 if (r_symndx >= symtab_hdr->sh_info)
3093 {
3094 struct ppc_link_hash_entry *eh;
3095 struct ppc_dyn_relocs **pp;
3096 struct ppc_dyn_relocs *p;
3097
3098 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3099 eh = (struct ppc_link_hash_entry *) h;
3100
3101 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3102 if (p->sec == sec)
3103 {
3104 p->count -= 1;
3105 if (p->count == 0)
3106 *pp = p->next;
3107 break;
3108 }
3109 }
3110 break;
3111
3112 default:
3113 break;
3114 }
3115 }
3116 return true;
3117 }
3118
3119 /* Called via elf_link_hash_traverse to transfer dynamic linking
3120 information on function code symbol entries to their corresponding
3121 function descriptor symbol entries. */
3122 static boolean
3123 func_desc_adjust (h, inf)
3124 struct elf_link_hash_entry *h;
3125 PTR inf;
3126 {
3127 struct bfd_link_info *info;
3128 struct ppc_link_hash_table *htab;
3129
3130 if (h->root.type == bfd_link_hash_indirect)
3131 return true;
3132
3133 if (h->root.type == bfd_link_hash_warning)
3134 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3135
3136 info = (struct bfd_link_info *) inf;
3137 htab = ppc_hash_table (info);
3138
3139 /* If this is a function code symbol, transfer dynamic linking
3140 information to the function descriptor symbol. */
3141 if (!((struct ppc_link_hash_entry *) h)->is_func)
3142 return true;
3143
3144 if (h->root.type == bfd_link_hash_undefweak
3145 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
3146 htab->have_undefweak = true;
3147
3148 if (h->plt.refcount > 0
3149 && h->root.root.string[0] == '.'
3150 && h->root.root.string[1] != '\0')
3151 {
3152 struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh;
3153 boolean force_local;
3154
3155 /* Find the corresponding function descriptor symbol. Create it
3156 as undefined if necessary. */
3157
3158 if (fdh == NULL)
3159 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
3160 false, false, true);
3161
3162 if (fdh == NULL
3163 && info->shared
3164 && (h->root.type == bfd_link_hash_undefined
3165 || h->root.type == bfd_link_hash_undefweak))
3166 {
3167 bfd *abfd;
3168 asymbol *newsym;
3169
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 if ( !(_bfd_generic_link_add_one_symbol
3180 (info, abfd, newsym->name, newsym->flags,
3181 newsym->section, newsym->value, NULL, false, false,
3182 (struct bfd_link_hash_entry **) &fdh)))
3183 {
3184 return false;
3185 }
3186 fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
3187 }
3188
3189 if (fdh != NULL
3190 && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
3191 && (info->shared
3192 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3193 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
3194 {
3195 if (fdh->dynindx == -1)
3196 if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
3197 return false;
3198 fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
3199 & (ELF_LINK_HASH_REF_REGULAR
3200 | ELF_LINK_HASH_REF_DYNAMIC
3201 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
3202 | ELF_LINK_NON_GOT_REF));
3203 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3204 {
3205 fdh->plt.refcount = h->plt.refcount;
3206 fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3207 }
3208 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
3209 ((struct ppc_link_hash_entry *) fdh)->oh = h;
3210 ((struct ppc_link_hash_entry *) h)->oh = fdh;
3211 }
3212
3213 /* Now that the info is on the function descriptor, clear the
3214 function code sym info. Any function code syms for which we
3215 don't have a definition in a regular file, we force local.
3216 This prevents a shared library from exporting syms that have
3217 been imported from another library. Function code syms that
3218 are really in the library we must leave global to prevent the
3219 linker dragging in a definition from a static library. */
3220 force_local = (info->shared
3221 && ((h->elf_link_hash_flags
3222 & ELF_LINK_HASH_DEF_REGULAR) == 0
3223 || fdh == NULL
3224 || (fdh->elf_link_hash_flags
3225 & ELF_LINK_HASH_DEF_REGULAR) == 0
3226 || (fdh->elf_link_hash_flags
3227 & ELF_LINK_FORCED_LOCAL) != 0));
3228 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
3229 }
3230
3231 return true;
3232 }
3233
3234 #define MIN_SAVE_FPR 14
3235 #define MAX_SAVE_FPR 31
3236
3237 /* Called near the start of bfd_elf_size_dynamic_sections. We use
3238 this hook to a) provide some gcc support functions, and b) transfer
3239 dynamic linking information gathered so far on function code symbol
3240 entries, to their corresponding function descriptor symbol entries. */
3241 static boolean
3242 ppc64_elf_func_desc_adjust (obfd, info)
3243 bfd *obfd ATTRIBUTE_UNUSED;
3244 struct bfd_link_info *info;
3245 {
3246 struct ppc_link_hash_table *htab;
3247 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
3248 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
3249 unsigned int i;
3250 struct elf_link_hash_entry *h;
3251 bfd_byte *p;
3252 char sym[10];
3253
3254 htab = ppc_hash_table (info);
3255
3256 if (htab->sfpr == NULL)
3257 /* We don't have any relocs. */
3258 return true;
3259
3260 /* First provide any missing ._savef* and ._restf* functions. */
3261 memcpy (sym, "._savef14", 10);
3262 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
3263 {
3264 sym[7] = i / 10 + '0';
3265 sym[8] = i % 10 + '0';
3266 h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
3267 if (h != NULL
3268 && h->root.type == bfd_link_hash_undefined)
3269 {
3270 if (lowest_savef > i)
3271 lowest_savef = i;
3272 h->root.type = bfd_link_hash_defined;
3273 h->root.u.def.section = htab->sfpr;
3274 h->root.u.def.value = (i - lowest_savef) * 4;
3275 h->type = STT_FUNC;
3276 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3277 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
3278 }
3279 }
3280
3281 memcpy (sym, "._restf14", 10);
3282 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
3283 {
3284 sym[7] = i / 10 + '0';
3285 sym[8] = i % 10 + '0';
3286 h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
3287 if (h != NULL
3288 && h->root.type == bfd_link_hash_undefined)
3289 {
3290 if (lowest_restf > i)
3291 lowest_restf = i;
3292 h->root.type = bfd_link_hash_defined;
3293 h->root.u.def.section = htab->sfpr;
3294 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
3295 + (i - lowest_restf) * 4);
3296 h->type = STT_FUNC;
3297 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3298 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
3299 }
3300 }
3301
3302 elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
3303
3304 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
3305 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
3306
3307 if (htab->sfpr->_raw_size == 0)
3308 {
3309 if (!htab->have_undefweak)
3310 {
3311 _bfd_strip_section_from_output (info, htab->sfpr);
3312 return true;
3313 }
3314
3315 htab->sfpr->_raw_size = 4;
3316 }
3317
3318 p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
3319 if (p == NULL)
3320 return false;
3321 htab->sfpr->contents = p;
3322
3323 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
3324 {
3325 unsigned int fpr = i << 21;
3326 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
3327 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
3328 p += 4;
3329 }
3330 if (lowest_savef <= MAX_SAVE_FPR)
3331 {
3332 bfd_put_32 (htab->elf.dynobj, BLR, p);
3333 p += 4;
3334 }
3335
3336 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
3337 {
3338 unsigned int fpr = i << 21;
3339 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
3340 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
3341 p += 4;
3342 }
3343 if (lowest_restf <= MAX_SAVE_FPR
3344 || htab->sfpr->_raw_size == 4)
3345 {
3346 bfd_put_32 (htab->elf.dynobj, BLR, p);
3347 }
3348
3349 return true;
3350 }
3351
3352 /* Adjust a symbol defined by a dynamic object and referenced by a
3353 regular object. The current definition is in some section of the
3354 dynamic object, but we're not including those sections. We have to
3355 change the definition to something the rest of the link can
3356 understand. */
3357
3358 static boolean
3359 ppc64_elf_adjust_dynamic_symbol (info, h)
3360 struct bfd_link_info *info;
3361 struct elf_link_hash_entry *h;
3362 {
3363 struct ppc_link_hash_table *htab;
3364 struct ppc_link_hash_entry * eh;
3365 struct ppc_dyn_relocs *p;
3366 asection *s;
3367 unsigned int power_of_two;
3368
3369 htab = ppc_hash_table (info);
3370
3371 /* Deal with function syms. */
3372 if (h->type == STT_FUNC
3373 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
3374 {
3375 /* Clear procedure linkage table information for any symbol that
3376 won't need a .plt entry. */
3377 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
3378 || h->plt.refcount <= 0
3379 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
3380 || (! info->shared
3381 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
3382 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
3383 {
3384 h->plt.offset = (bfd_vma) -1;
3385 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3386 }
3387 return true;
3388 }
3389 else
3390 h->plt.offset = (bfd_vma) -1;
3391
3392 /* If this is a weak symbol, and there is a real definition, the
3393 processor independent code will have arranged for us to see the
3394 real definition first, and we can just use the same value. */
3395 if (h->weakdef != NULL)
3396 {
3397 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
3398 || h->weakdef->root.type == bfd_link_hash_defweak);
3399 h->root.u.def.section = h->weakdef->root.u.def.section;
3400 h->root.u.def.value = h->weakdef->root.u.def.value;
3401 return true;
3402 }
3403
3404 /* This is a reference to a symbol defined by a dynamic object which
3405 is not a function. */
3406
3407 /* If we are creating a shared library, we must presume that the
3408 only references to the symbol are via the global offset table.
3409 For such cases we need not do anything here; the relocations will
3410 be handled correctly by relocate_section. */
3411 if (info->shared)
3412 return true;
3413
3414 /* If there are no references to this symbol that do not use the
3415 GOT, we don't need to generate a copy reloc. */
3416 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
3417 return true;
3418
3419 eh = (struct ppc_link_hash_entry *) h;
3420 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3421 {
3422 s = p->sec->output_section;
3423 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3424 break;
3425 }
3426
3427 /* If we didn't find any dynamic relocs in read-only sections, then
3428 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3429 if (p == NULL)
3430 {
3431 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
3432 return true;
3433 }
3434
3435 /* We must allocate the symbol in our .dynbss section, which will
3436 become part of the .bss section of the executable. There will be
3437 an entry for this symbol in the .dynsym section. The dynamic
3438 object will contain position independent code, so all references
3439 from the dynamic object to this symbol will go through the global
3440 offset table. The dynamic linker will use the .dynsym entry to
3441 determine the address it must put in the global offset table, so
3442 both the dynamic object and the regular object will refer to the
3443 same memory location for the variable. */
3444
3445 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3446 copy the initial value out of the dynamic object and into the
3447 runtime process image. We need to remember the offset into the
3448 .rela.bss section we are going to use. */
3449 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3450 {
3451 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
3452 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3453 }
3454
3455 /* We need to figure out the alignment required for this symbol. I
3456 have no idea how ELF linkers handle this. */
3457 power_of_two = bfd_log2 (h->size);
3458 if (power_of_two > 4)
3459 power_of_two = 4;
3460
3461 /* Apply the required alignment. */
3462 s = htab->sdynbss;
3463 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
3464 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3465 {
3466 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3467 return false;
3468 }
3469
3470 /* Define the symbol as being at this point in the section. */
3471 h->root.u.def.section = s;
3472 h->root.u.def.value = s->_raw_size;
3473
3474 /* Increment the section size to make room for the symbol. */
3475 s->_raw_size += h->size;
3476
3477 return true;
3478 }
3479
3480 /* If given a function descriptor symbol, hide both the function code
3481 sym and the descriptor. */
3482 static void
3483 ppc64_elf_hide_symbol (info, h, force_local)
3484 struct bfd_link_info *info;
3485 struct elf_link_hash_entry *h;
3486 boolean force_local;
3487 {
3488 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
3489
3490 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
3491 {
3492 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
3493
3494 if (fh == NULL)
3495 {
3496 const char *p, *q;
3497 struct ppc_link_hash_table *htab;
3498 char save;
3499
3500 /* We aren't supposed to use alloca in BFD because on
3501 systems which do not have alloca the version in libiberty
3502 calls xmalloc, which might cause the program to crash
3503 when it runs out of memory. This function doesn't have a
3504 return status, so there's no way to gracefully return an
3505 error. So cheat. We know that string[-1] can be safely
3506 dereferenced; It's either a string in an ELF string
3507 table, or allocated in an objalloc structure. */
3508
3509 p = h->root.root.string - 1;
3510 save = *p;
3511 *(char *) p = '.';
3512 htab = ppc_hash_table (info);
3513 fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
3514 *(char *) p = save;
3515
3516 /* Unfortunately, if it so happens that the string we were
3517 looking for was allocated immediately before this string,
3518 then we overwrote the string terminator. That's the only
3519 reason the lookup should fail. */
3520 if (fh == NULL)
3521 {
3522 q = h->root.root.string + strlen (h->root.root.string);
3523 while (q >= h->root.root.string && *q == *p)
3524 --q, --p;
3525 if (q < h->root.root.string && *p == '.')
3526 fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
3527 }
3528 if (fh != NULL)
3529 {
3530 ((struct ppc_link_hash_entry *) h)->oh = fh;
3531 ((struct ppc_link_hash_entry *) fh)->oh = h;
3532 }
3533 }
3534 if (fh != NULL)
3535 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
3536 }
3537 }
3538
3539 static boolean
3540 edit_opd (obfd, info)
3541 bfd *obfd;
3542 struct bfd_link_info *info;
3543 {
3544 bfd *ibfd;
3545 unsigned int bfd_indx;
3546
3547 for (bfd_indx = 0, ibfd = info->input_bfds;
3548 ibfd != NULL;
3549 ibfd = ibfd->link_next, bfd_indx++)
3550 {
3551 asection *sec;
3552 Elf_Internal_Rela *relstart, *rel, *relend;
3553 Elf_Internal_Shdr *symtab_hdr;
3554 Elf_Internal_Sym *local_syms;
3555 struct elf_link_hash_entry **sym_hashes;
3556 bfd_vma offset;
3557 long *adjust;
3558 boolean need_edit;
3559
3560 sec = bfd_get_section_by_name (ibfd, ".opd");
3561 if (sec == NULL)
3562 continue;
3563
3564 adjust = (long *) elf_section_data (sec)->tdata;
3565 BFD_ASSERT (adjust != NULL);
3566 memset (adjust, 0, (size_t) sec->_raw_size * sizeof (long) / 24);
3567
3568 if (sec->output_section == bfd_abs_section_ptr)
3569 continue;
3570
3571 /* Look through the section relocs. */
3572 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
3573 continue;
3574
3575 local_syms = NULL;
3576 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3577 sym_hashes = elf_sym_hashes (ibfd);
3578
3579 /* Read the relocations. */
3580 relstart = _bfd_elf64_link_read_relocs (obfd, sec, (PTR) NULL,
3581 (Elf_Internal_Rela *) NULL,
3582 info->keep_memory);
3583 if (relstart == NULL)
3584 return false;
3585
3586 /* First run through the relocs to check they are sane, and to
3587 determine whether we need to edit this opd section. */
3588 need_edit = false;
3589 offset = 0;
3590 relend = relstart + sec->reloc_count;
3591 for (rel = relstart; rel < relend; rel++)
3592 {
3593 enum elf_ppc_reloc_type r_type;
3594 unsigned long r_symndx;
3595 asection *sym_sec;
3596 struct elf_link_hash_entry *h;
3597 Elf_Internal_Sym *sym;
3598
3599 /* .opd contains a regular array of 24 byte entries. We're
3600 only interested in the reloc pointing to a function entry
3601 point. */
3602 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
3603 if (r_type == R_PPC64_TOC)
3604 continue;
3605
3606 if (r_type != R_PPC64_ADDR64)
3607 {
3608 (*_bfd_error_handler)
3609 (_("%s: unexpected reloc type %u in .opd section"),
3610 bfd_archive_filename (ibfd), r_type);
3611 need_edit = false;
3612 break;
3613 }
3614
3615 if (rel + 1 >= relend)
3616 continue;
3617 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info);
3618 if (r_type != R_PPC64_TOC)
3619 continue;
3620
3621 if (rel->r_offset != offset)
3622 {
3623 /* If someone messes with .opd alignment then after a
3624 "ld -r" we might have padding in the middle of .opd.
3625 Also, there's nothing to prevent someone putting
3626 something silly in .opd with the assembler. No .opd
3627 optimization for them! */
3628 (*_bfd_error_handler)
3629 (_("%s: .opd is not a regular array of opd entries"),
3630 bfd_archive_filename (ibfd));
3631 need_edit = false;
3632 break;
3633 }
3634
3635 r_symndx = ELF64_R_SYM (rel->r_info);
3636 sym_sec = NULL;
3637 h = NULL;
3638 sym = NULL;
3639 if (r_symndx >= symtab_hdr->sh_info)
3640 {
3641 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3642 while (h->root.type == bfd_link_hash_indirect
3643 || h->root.type == bfd_link_hash_warning)
3644 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3645 if (h->root.type == bfd_link_hash_defined
3646 || h->root.type == bfd_link_hash_defweak)
3647 sym_sec = h->root.u.def.section;
3648 }
3649 else
3650 {
3651 if (local_syms == NULL)
3652 {
3653 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3654 if (local_syms == NULL)
3655 local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3656 symtab_hdr->sh_info, 0,
3657 NULL, NULL, NULL);
3658 if (local_syms == NULL)
3659 goto error_free_rel;
3660 }
3661 sym = local_syms + r_symndx;
3662 if ((sym->st_shndx != SHN_UNDEF
3663 && sym->st_shndx < SHN_LORESERVE)
3664 || sym->st_shndx > SHN_HIRESERVE)
3665 sym_sec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
3666 }
3667
3668 if (sym_sec == NULL || sym_sec->owner == NULL)
3669 {
3670 (*_bfd_error_handler)
3671 (_("%s: undefined sym `%s' in .opd section"),
3672 bfd_archive_filename (ibfd),
3673 h != NULL ? h->root.root.string : "<local symbol>");
3674 need_edit = false;
3675 break;
3676 }
3677
3678 if (sym_sec->output_section == bfd_abs_section_ptr)
3679 {
3680 /* OK, we've found a function that's excluded from the
3681 link. */
3682 need_edit = true;
3683 }
3684
3685 offset += 24;
3686 }
3687
3688 if (need_edit)
3689 {
3690 Elf_Internal_Rela *write_rel;
3691 bfd_byte *rptr, *wptr;
3692 boolean skip;
3693
3694 /* This seems a waste of time as input .opd sections are all
3695 zeros as generated by gcc, but I suppose there's no reason
3696 this will always be so. We might start putting something in
3697 the third word of .opd entries. */
3698 if ((sec->flags & SEC_IN_MEMORY) == 0)
3699 {
3700 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
3701 if (loc == NULL
3702 || !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0,
3703 sec->_raw_size))
3704 {
3705 if (local_syms != NULL
3706 && symtab_hdr->contents != (unsigned char *) local_syms)
3707 free (local_syms);
3708 error_free_rel:
3709 if (elf_section_data (sec)->relocs != relstart)
3710 free (relstart);
3711 return false;
3712 }
3713 sec->contents = loc;
3714 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
3715 }
3716
3717 elf_section_data (sec)->relocs = relstart;
3718
3719 wptr = sec->contents;
3720 rptr = sec->contents;
3721 write_rel = relstart;
3722 skip = false;
3723 offset = 0;
3724 for (rel = relstart; rel < relend; rel++)
3725 {
3726 if (rel->r_offset == offset)
3727 {
3728 unsigned long r_symndx;
3729 asection *sym_sec;
3730 struct elf_link_hash_entry *h;
3731 Elf_Internal_Sym *sym;
3732
3733 r_symndx = ELF64_R_SYM (rel->r_info);
3734 sym_sec = NULL;
3735 h = NULL;
3736 sym = NULL;
3737 if (r_symndx >= symtab_hdr->sh_info)
3738 {
3739 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3740 while (h->root.type == bfd_link_hash_indirect
3741 || h->root.type == bfd_link_hash_warning)
3742 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3743 if (h->root.type == bfd_link_hash_defined
3744 || h->root.type == bfd_link_hash_defweak)
3745 sym_sec = h->root.u.def.section;
3746 }
3747 else
3748 {
3749 sym = local_syms + r_symndx;
3750 if ((sym->st_shndx != SHN_UNDEF
3751 && sym->st_shndx < SHN_LORESERVE)
3752 || sym->st_shndx > SHN_HIRESERVE)
3753 sym_sec = bfd_section_from_elf_index (ibfd,
3754 sym->st_shndx);
3755 }
3756
3757 skip = sym_sec->output_section == bfd_abs_section_ptr;
3758 if (skip)
3759 {
3760 if (h != NULL)
3761 {
3762 /* Arrange for the function descriptor sym
3763 to be dropped. */
3764 struct elf_link_hash_entry *fdh;
3765 struct ppc_link_hash_entry *fh;
3766
3767 fh = (struct ppc_link_hash_entry *) h;
3768 BFD_ASSERT (fh->is_func);
3769 fdh = fh->oh;
3770 fdh->root.u.def.value = 0;
3771 fdh->root.u.def.section = sym_sec;
3772 }
3773 }
3774 else
3775 {
3776 /* We'll be keeping this opd entry. */
3777
3778 if (h != NULL)
3779 {
3780 /* Redefine the function descriptor symbol
3781 to this location in the opd section.
3782 We've checked above that opd relocs are
3783 ordered. */
3784 struct elf_link_hash_entry *fdh;
3785 struct ppc_link_hash_entry *fh;
3786
3787 fh = (struct ppc_link_hash_entry *) h;
3788 BFD_ASSERT (fh->is_func);
3789 fdh = fh->oh;
3790 fdh->root.u.def.value = wptr - sec->contents;
3791 }
3792 else
3793 {
3794 /* Local syms are a bit tricky. We could
3795 tweak them as they can be cached, but
3796 we'd need to look through the local syms
3797 for the function descriptor sym which we
3798 don't have at the moment. So keep an
3799 array of adjustments. */
3800 adjust[(rel->r_offset + wptr - rptr) / 24]
3801 = wptr - rptr;
3802 }
3803
3804 if (wptr != rptr)
3805 memcpy (wptr, rptr, 24);
3806 wptr += 24;
3807 }
3808 rptr += 24;
3809 offset += 24;
3810 }
3811
3812 /* We need to adjust any reloc offsets to point to the
3813 new opd entries. While we're at it, we may as well
3814 remove redundant relocs. */
3815 if (!skip)
3816 {
3817 rel->r_offset += wptr - rptr;
3818 if (write_rel != rel)
3819 memcpy (write_rel, rel, sizeof (*rel));
3820 ++write_rel;
3821 }
3822 }
3823
3824 sec->_cooked_size = wptr - sec->contents;
3825 sec->reloc_count = write_rel - relstart;
3826 }
3827 else if (elf_section_data (sec)->relocs != relstart)
3828 free (relstart);
3829
3830 if (local_syms != NULL
3831 && symtab_hdr->contents != (unsigned char *) local_syms)
3832 {
3833 if (!info->keep_memory)
3834 free (local_syms);
3835 else
3836 symtab_hdr->contents = (unsigned char *) local_syms;
3837 }
3838 }
3839
3840 return true;
3841 }
3842
3843 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
3844 will be called from elflink.h. If elflink.h doesn't call our
3845 finish_dynamic_symbol routine, we'll need to do something about
3846 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
3847 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
3848 ((DYN) \
3849 && ((INFO)->shared \
3850 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
3851 && ((H)->dynindx != -1 \
3852 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
3853
3854 /* Allocate space in .plt, .got and associated reloc sections for
3855 dynamic relocs. */
3856
3857 static boolean
3858 allocate_dynrelocs (h, inf)
3859 struct elf_link_hash_entry *h;
3860 PTR inf;
3861 {
3862 struct bfd_link_info *info;
3863 struct ppc_link_hash_table *htab;
3864 asection *s;
3865 struct ppc_link_hash_entry *eh;
3866 struct ppc_dyn_relocs *p;
3867
3868 if (h->root.type == bfd_link_hash_indirect)
3869 return true;
3870
3871 if (h->root.type == bfd_link_hash_warning)
3872 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3873
3874 info = (struct bfd_link_info *) inf;
3875 htab = ppc_hash_table (info);
3876
3877 if (htab->elf.dynamic_sections_created
3878 && h->plt.refcount > 0
3879 && h->dynindx != -1)
3880 {
3881 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
3882
3883 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
3884 {
3885 /* If this is the first .plt entry, make room for the special
3886 first entry. */
3887 s = htab->splt;
3888 if (s->_raw_size == 0)
3889 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
3890
3891 h->plt.offset = s->_raw_size;
3892
3893 /* Make room for this entry. */
3894 s->_raw_size += PLT_ENTRY_SIZE;
3895
3896 /* Make room for the .glink code. */
3897 s = htab->sglink;
3898 if (s->_raw_size == 0)
3899 s->_raw_size += GLINK_CALL_STUB_SIZE;
3900 /* We need bigger stubs past index 32767. */
3901 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
3902 s->_raw_size += 4;
3903 s->_raw_size += 2*4;
3904
3905 /* We also need to make an entry in the .rela.plt section. */
3906 s = htab->srelplt;
3907 s->_raw_size += sizeof (Elf64_External_Rela);
3908 }
3909 else
3910 {
3911 h->plt.offset = (bfd_vma) -1;
3912 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3913 }
3914 }
3915 else
3916 {
3917 h->plt.offset = (bfd_vma) -1;
3918 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3919 }
3920
3921 if (h->got.refcount > 0)
3922 {
3923 boolean dyn;
3924
3925 /* Make sure this symbol is output as a dynamic symbol.
3926 Undefined weak syms won't yet be marked as dynamic. */
3927 if (h->dynindx == -1
3928 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3929 {
3930 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3931 return false;
3932 }
3933
3934 s = htab->sgot;
3935 h->got.offset = s->_raw_size;
3936 s->_raw_size += 8;
3937 dyn = htab->elf.dynamic_sections_created;
3938 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
3939 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
3940 }
3941 else
3942 h->got.offset = (bfd_vma) -1;
3943
3944 eh = (struct ppc_link_hash_entry *) h;
3945 if (eh->dyn_relocs == NULL)
3946 return true;
3947
3948 /* In the shared -Bsymbolic case, discard space allocated for
3949 dynamic pc-relative relocs against symbols which turn out to be
3950 defined in regular objects. For the normal shared case, discard
3951 space for relocs that have become local due to symbol visibility
3952 changes. */
3953
3954 if (info->shared)
3955 {
3956 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
3957 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
3958 || info->symbolic))
3959 {
3960 struct ppc_dyn_relocs **pp;
3961
3962 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3963 {
3964 p->count -= p->pc_count;
3965 p->pc_count = 0;
3966 if (p->count == 0)
3967 *pp = p->next;
3968 else
3969 pp = &p->next;
3970 }
3971 }
3972 }
3973 else
3974 {
3975 /* For the non-shared case, discard space for relocs against
3976 symbols which turn out to need copy relocs or are not
3977 dynamic. */
3978
3979 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3980 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3981 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3982 || (htab->elf.dynamic_sections_created
3983 && (h->root.type == bfd_link_hash_undefweak
3984 || h->root.type == bfd_link_hash_undefined))))
3985 {
3986 /* Make sure this symbol is output as a dynamic symbol.
3987 Undefined weak syms won't yet be marked as dynamic. */
3988 if (h->dynindx == -1
3989 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3990 {
3991 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
3992 return false;
3993 }
3994
3995 /* If that succeeded, we know we'll be keeping all the
3996 relocs. */
3997 if (h->dynindx != -1)
3998 goto keep;
3999 }
4000
4001 eh->dyn_relocs = NULL;
4002
4003 keep: ;
4004 }
4005
4006 /* Finally, allocate space. */
4007 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4008 {
4009 asection *sreloc = elf_section_data (p->sec)->sreloc;
4010 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
4011 }
4012
4013 return true;
4014 }
4015
4016 /* Find any dynamic relocs that apply to read-only sections. */
4017
4018 static boolean
4019 readonly_dynrelocs (h, inf)
4020 struct elf_link_hash_entry *h;
4021 PTR inf;
4022 {
4023 struct ppc_link_hash_entry *eh;
4024 struct ppc_dyn_relocs *p;
4025
4026 if (h->root.type == bfd_link_hash_warning)
4027 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4028
4029 eh = (struct ppc_link_hash_entry *) h;
4030 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4031 {
4032 asection *s = p->sec->output_section;
4033
4034 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4035 {
4036 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4037
4038 info->flags |= DF_TEXTREL;
4039
4040 /* Not an error, just cut short the traversal. */
4041 return false;
4042 }
4043 }
4044 return true;
4045 }
4046
4047 /* Set the sizes of the dynamic sections. */
4048
4049 static boolean
4050 ppc64_elf_size_dynamic_sections (output_bfd, info)
4051 bfd *output_bfd ATTRIBUTE_UNUSED;
4052 struct bfd_link_info *info;
4053 {
4054 struct ppc_link_hash_table *htab;
4055 bfd *dynobj;
4056 asection *s;
4057 boolean relocs;
4058 bfd *ibfd;
4059
4060 htab = ppc_hash_table (info);
4061 dynobj = htab->elf.dynobj;
4062 if (dynobj == NULL)
4063 abort ();
4064
4065 if (htab->elf.dynamic_sections_created)
4066 {
4067 /* Set the contents of the .interp section to the interpreter. */
4068 if (! info->shared)
4069 {
4070 s = bfd_get_section_by_name (dynobj, ".interp");
4071 if (s == NULL)
4072 abort ();
4073 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
4074 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4075 }
4076 }
4077
4078 /* Set up .got offsets for local syms, and space for local dynamic
4079 relocs. */
4080 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4081 {
4082 bfd_signed_vma *local_got;
4083 bfd_signed_vma *end_local_got;
4084 bfd_size_type locsymcount;
4085 Elf_Internal_Shdr *symtab_hdr;
4086 asection *srel;
4087
4088 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4089 continue;
4090
4091 for (s = ibfd->sections; s != NULL; s = s->next)
4092 {
4093 struct ppc_dyn_relocs *p;
4094
4095 for (p = *((struct ppc_dyn_relocs **)
4096 &elf_section_data (s)->local_dynrel);
4097 p != NULL;
4098 p = p->next)
4099 {
4100 if (!bfd_is_abs_section (p->sec)
4101 && bfd_is_abs_section (p->sec->output_section))
4102 {
4103 /* Input section has been discarded, either because
4104 it is a copy of a linkonce section or due to
4105 linker script /DISCARD/, so we'll be discarding
4106 the relocs too. */
4107 }
4108 else if (p->count != 0)
4109 {
4110 srel = elf_section_data (p->sec)->sreloc;
4111 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
4112 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
4113 info->flags |= DF_TEXTREL;
4114 }
4115 }
4116 }
4117
4118 local_got = elf_local_got_refcounts (ibfd);
4119 if (!local_got)
4120 continue;
4121
4122 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4123 locsymcount = symtab_hdr->sh_info;
4124 end_local_got = local_got + locsymcount;
4125 s = htab->sgot;
4126 srel = htab->srelgot;
4127 for (; local_got < end_local_got; ++local_got)
4128 {
4129 if (*local_got > 0)
4130 {
4131 *local_got = s->_raw_size;
4132 s->_raw_size += 8;
4133 if (info->shared)
4134 srel->_raw_size += sizeof (Elf64_External_Rela);
4135 }
4136 else
4137 *local_got = (bfd_vma) -1;
4138 }
4139 }
4140
4141 if (!edit_opd (output_bfd, info))
4142 return false;
4143
4144 /* Allocate global sym .plt and .got entries, and space for global
4145 sym dynamic relocs. */
4146 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
4147
4148 /* We now have determined the sizes of the various dynamic sections.
4149 Allocate memory for them. */
4150 relocs = false;
4151 for (s = dynobj->sections; s != NULL; s = s->next)
4152 {
4153 if ((s->flags & SEC_LINKER_CREATED) == 0)
4154 continue;
4155
4156 if (s == htab->sbrlt || s == htab->srelbrlt)
4157 /* These haven't been allocated yet; don't strip. */
4158 continue;
4159 else if (s == htab->splt
4160 || s == htab->sgot
4161 || s == htab->sglink)
4162 {
4163 /* Strip this section if we don't need it; see the
4164 comment below. */
4165 }
4166 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4167 {
4168 if (s->_raw_size == 0)
4169 {
4170 /* If we don't need this section, strip it from the
4171 output file. This is mostly to handle .rela.bss and
4172 .rela.plt. We must create both sections in
4173 create_dynamic_sections, because they must be created
4174 before the linker maps input sections to output
4175 sections. The linker does that before
4176 adjust_dynamic_symbol is called, and it is that
4177 function which decides whether anything needs to go
4178 into these sections. */
4179 }
4180 else
4181 {
4182 if (s != htab->srelplt)
4183 relocs = true;
4184
4185 /* We use the reloc_count field as a counter if we need
4186 to copy relocs into the output file. */
4187 s->reloc_count = 0;
4188 }
4189 }
4190 else
4191 {
4192 /* It's not one of our sections, so don't allocate space. */
4193 continue;
4194 }
4195
4196 if (s->_raw_size == 0)
4197 {
4198 _bfd_strip_section_from_output (info, s);
4199 continue;
4200 }
4201
4202 /* .plt is in the bss section. We don't initialise it. */
4203 if ((s->flags & SEC_LOAD) == 0)
4204 continue;
4205
4206 /* Allocate memory for the section contents. We use bfd_zalloc
4207 here in case unused entries are not reclaimed before the
4208 section's contents are written out. This should not happen,
4209 but this way if it does, we get a R_PPC64_NONE reloc instead
4210 of garbage. */
4211 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
4212 if (s->contents == NULL)
4213 return false;
4214 }
4215
4216 if (htab->elf.dynamic_sections_created)
4217 {
4218 /* Add some entries to the .dynamic section. We fill in the
4219 values later, in ppc64_elf_finish_dynamic_sections, but we
4220 must add the entries now so that we get the correct size for
4221 the .dynamic section. The DT_DEBUG entry is filled in by the
4222 dynamic linker and used by the debugger. */
4223 #define add_dynamic_entry(TAG, VAL) \
4224 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
4225
4226 if (!info->shared)
4227 {
4228 if (!add_dynamic_entry (DT_DEBUG, 0))
4229 return false;
4230 }
4231
4232 if (htab->splt != NULL && htab->splt->_raw_size != 0)
4233 {
4234 if (!add_dynamic_entry (DT_PLTGOT, 0)
4235 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4236 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4237 || !add_dynamic_entry (DT_JMPREL, 0)
4238 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
4239 return false;
4240 }
4241
4242 if (NO_OPD_RELOCS)
4243 {
4244 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
4245 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
4246 return false;
4247 }
4248
4249 if (relocs)
4250 {
4251 if (!add_dynamic_entry (DT_RELA, 0)
4252 || !add_dynamic_entry (DT_RELASZ, 0)
4253 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
4254 return false;
4255
4256 /* If any dynamic relocs apply to a read-only section,
4257 then we need a DT_TEXTREL entry. */
4258 if ((info->flags & DF_TEXTREL) == 0)
4259 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
4260 (PTR) info);
4261
4262 if ((info->flags & DF_TEXTREL) != 0)
4263 {
4264 if (!add_dynamic_entry (DT_TEXTREL, 0))
4265 return false;
4266 }
4267 }
4268 }
4269 #undef add_dynamic_entry
4270
4271 return true;
4272 }
4273
4274 /* Determine the type of stub needed, if any, for a call. */
4275
4276 static INLINE enum ppc_stub_type
4277 ppc_type_of_stub (input_sec, rel, hash, destination)
4278 asection *input_sec;
4279 const Elf_Internal_Rela *rel;
4280 struct ppc_link_hash_entry **hash;
4281 bfd_vma destination;
4282 {
4283 struct ppc_link_hash_entry *h = *hash;
4284 bfd_vma location;
4285 bfd_vma branch_offset;
4286 bfd_vma max_branch_offset;
4287 unsigned int r_type;
4288
4289 if (h != NULL)
4290 {
4291 if (h->oh != NULL
4292 && h->oh->plt.offset != (bfd_vma) -1
4293 && h->oh->dynindx != -1)
4294 {
4295 *hash = (struct ppc_link_hash_entry *) h->oh;
4296 return ppc_stub_plt_call;
4297 }
4298
4299 if (h->elf.root.type == bfd_link_hash_undefweak
4300 || h->elf.root.type == bfd_link_hash_undefined)
4301 return ppc_stub_none;
4302 }
4303
4304 /* Determine where the call point is. */
4305 location = (input_sec->output_offset
4306 + input_sec->output_section->vma
4307 + rel->r_offset);
4308
4309 branch_offset = destination - location;
4310 r_type = ELF64_R_TYPE (rel->r_info);
4311
4312 /* Determine if a long branch stub is needed. */
4313 max_branch_offset = 1 << 25;
4314 if (r_type != (unsigned int) R_PPC64_REL24)
4315 max_branch_offset = 1 << 15;
4316
4317 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
4318 /* We need a stub. Figure out whether a long_branch or plt_branch
4319 is needed later. */
4320 return ppc_stub_long_branch;
4321
4322 return ppc_stub_none;
4323 }
4324
4325 /* Build a .plt call stub. */
4326
4327 static bfd_byte *
4328 build_plt_stub (obfd, p, offset, glink)
4329 bfd *obfd;
4330 bfd_byte *p;
4331 int offset;
4332 int glink;
4333 {
4334 #define PPC_LO(v) ((v) & 0xffff)
4335 #define PPC_HI(v) (((v) >> 16) & 0xffff)
4336 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
4337
4338 if (glink)
4339 bfd_put_32 (obfd, LD_R2_40R1, p), p += 4;
4340 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
4341 if (!glink)
4342 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
4343 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
4344 if (PPC_HA (offset + 8) != PPC_HA (offset))
4345 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
4346 offset += 8;
4347 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
4348 if (PPC_HA (offset + 8) != PPC_HA (offset))
4349 bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
4350 offset += 8;
4351 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
4352 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
4353 bfd_put_32 (obfd, BCTR, p), p += 4;
4354 return p;
4355 }
4356
4357 static boolean
4358 ppc_build_one_stub (gen_entry, in_arg)
4359 struct bfd_hash_entry *gen_entry;
4360 PTR in_arg;
4361 {
4362 struct ppc_stub_hash_entry *stub_entry;
4363 struct ppc_branch_hash_entry *br_entry;
4364 struct bfd_link_info *info;
4365 struct ppc_link_hash_table *htab;
4366 asection *stub_sec;
4367 bfd *stub_bfd;
4368 bfd_byte *loc;
4369 bfd_byte *p;
4370 unsigned int indx;
4371 bfd_vma off;
4372 int size;
4373
4374 /* Massage our args to the form they really have. */
4375 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
4376 info = (struct bfd_link_info *) in_arg;
4377
4378 htab = ppc_hash_table (info);
4379 stub_sec = stub_entry->stub_sec;
4380
4381 /* Make a note of the offset within the stubs for this entry. */
4382 stub_entry->stub_offset = stub_sec->_cooked_size;
4383 loc = stub_sec->contents + stub_entry->stub_offset;
4384
4385 stub_bfd = stub_sec->owner;
4386
4387 switch (stub_entry->stub_type)
4388 {
4389 case ppc_stub_long_branch:
4390 /* Branches are relative. This is where we are going to. */
4391 off = (stub_entry->target_value
4392 + stub_entry->target_section->output_offset
4393 + stub_entry->target_section->output_section->vma);
4394
4395 /* And this is where we are coming from. */
4396 off -= (stub_entry->stub_offset
4397 + stub_sec->output_offset
4398 + stub_sec->output_section->vma);
4399
4400 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
4401
4402 bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
4403 size = 4;
4404 break;
4405
4406 case ppc_stub_plt_branch:
4407 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
4408 stub_entry->root.string + 9,
4409 false, false);
4410 if (br_entry == NULL)
4411 {
4412 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
4413 stub_entry->root.string + 9);
4414 htab->stub_error = true;
4415 return false;
4416 }
4417
4418 off = (stub_entry->target_value
4419 + stub_entry->target_section->output_offset
4420 + stub_entry->target_section->output_section->vma);
4421
4422 bfd_put_64 (htab->sbrlt->owner, off,
4423 htab->sbrlt->contents + br_entry->offset);
4424
4425 if (info->shared)
4426 {
4427 /* Create a reloc for the branch lookup table entry. */
4428 Elf_Internal_Rela rela;
4429 Elf64_External_Rela *r;
4430
4431 rela.r_offset = (br_entry->offset
4432 + htab->sbrlt->output_offset
4433 + htab->sbrlt->output_section->vma);
4434 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
4435 rela.r_addend = off;
4436
4437 r = (Elf64_External_Rela *) htab->srelbrlt->contents;
4438 r += htab->srelbrlt->reloc_count++;
4439 bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, r);
4440 }
4441
4442 off = (br_entry->offset
4443 + htab->sbrlt->output_offset
4444 + htab->sbrlt->output_section->vma
4445 - elf_gp (htab->sbrlt->output_section->owner)
4446 - TOC_BASE_OFF);
4447
4448 if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
4449 {
4450 (*_bfd_error_handler)
4451 (_("linkage table error against `%s'"),
4452 stub_entry->root.string);
4453 bfd_set_error (bfd_error_bad_value);
4454 htab->stub_error = true;
4455 return false;
4456 }
4457
4458 indx = off;
4459 bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
4460 bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4);
4461 bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8);
4462 bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12);
4463 size = 16;
4464 break;
4465
4466 case ppc_stub_plt_call:
4467 /* Do the best we can for shared libraries built without
4468 exporting ".foo" for each "foo". This can happen when symbol
4469 versioning scripts strip all bar a subset of symbols. */
4470 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
4471 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
4472 {
4473 /* Point the symbol at the stub. There may be multiple stubs,
4474 we don't really care; The main thing is to make this sym
4475 defined somewhere. */
4476 stub_entry->h->oh->root.type = bfd_link_hash_defined;
4477 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
4478 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
4479 }
4480
4481 /* Now build the stub. */
4482 off = stub_entry->h->elf.plt.offset;
4483 if (off >= (bfd_vma) -2)
4484 abort ();
4485
4486 off &= ~ (bfd_vma) 1;
4487 off += (htab->splt->output_offset
4488 + htab->splt->output_section->vma
4489 - elf_gp (htab->splt->output_section->owner)
4490 - TOC_BASE_OFF);
4491
4492 if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
4493 {
4494 (*_bfd_error_handler)
4495 (_("linkage table error against `%s'"),
4496 stub_entry->h->elf.root.root.string);
4497 bfd_set_error (bfd_error_bad_value);
4498 htab->stub_error = true;
4499 return false;
4500 }
4501
4502 p = build_plt_stub (stub_bfd, loc, (int) off, 0);
4503 size = p - loc;
4504 break;
4505
4506 default:
4507 BFD_FAIL ();
4508 return false;
4509 }
4510
4511 stub_sec->_cooked_size += size;
4512 return true;
4513 }
4514
4515 /* As above, but don't actually build the stub. Just bump offset so
4516 we know stub section sizes, and select plt_branch stubs where
4517 long_branch stubs won't do. */
4518
4519 static boolean
4520 ppc_size_one_stub (gen_entry, in_arg)
4521 struct bfd_hash_entry *gen_entry;
4522 PTR in_arg;
4523 {
4524 struct ppc_stub_hash_entry *stub_entry;
4525 struct ppc_link_hash_table *htab;
4526 bfd_vma off;
4527 int size;
4528
4529 /* Massage our args to the form they really have. */
4530 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
4531 htab = (struct ppc_link_hash_table *) in_arg;
4532
4533 if (stub_entry->stub_type == ppc_stub_plt_call)
4534 {
4535 off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1;
4536 off += (htab->splt->output_offset
4537 + htab->splt->output_section->vma
4538 - elf_gp (htab->splt->output_section->owner)
4539 - TOC_BASE_OFF);
4540
4541 size = 28;
4542 if (PPC_HA ((int) off + 16) != PPC_HA ((int) off))
4543 size += 4;
4544 }
4545 else
4546 {
4547 /* ppc_stub_long_branch or ppc_stub_plt_branch. */
4548 stub_entry->stub_type = ppc_stub_long_branch;
4549 size = 4;
4550
4551 off = (stub_entry->target_value
4552 + stub_entry->target_section->output_offset
4553 + stub_entry->target_section->output_section->vma);
4554 off -= (stub_entry->stub_sec->_raw_size
4555 + stub_entry->stub_sec->output_offset
4556 + stub_entry->stub_sec->output_section->vma);
4557
4558 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
4559 {
4560 struct ppc_branch_hash_entry *br_entry;
4561
4562 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
4563 stub_entry->root.string + 9,
4564 true, false);
4565 if (br_entry == NULL)
4566 {
4567 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
4568 stub_entry->root.string + 9);
4569 htab->stub_error = true;
4570 return false;
4571 }
4572
4573 if (br_entry->iter != htab->stub_iteration)
4574 {
4575 br_entry->iter = htab->stub_iteration;
4576 br_entry->offset = htab->sbrlt->_raw_size;
4577 htab->sbrlt->_raw_size += 8;
4578 }
4579 stub_entry->stub_type = ppc_stub_plt_branch;
4580 size = 16;
4581 }
4582 }
4583
4584 stub_entry->stub_sec->_raw_size += size;
4585 return true;
4586 }
4587
4588 /* Set up various things so that we can make a list of input sections
4589 for each output section included in the link. Returns -1 on error,
4590 0 when no stubs will be needed, and 1 on success. */
4591
4592 int
4593 ppc64_elf_setup_section_lists (output_bfd, info)
4594 bfd *output_bfd;
4595 struct bfd_link_info *info;
4596 {
4597 bfd *input_bfd;
4598 int top_id, top_index;
4599 asection *section;
4600 asection **input_list, **list;
4601 bfd_size_type amt;
4602 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4603
4604 if (htab->elf.root.creator->flavour != bfd_target_elf_flavour
4605 || htab->sbrlt == NULL)
4606 return 0;
4607
4608 /* Find the top input section id. */
4609 for (input_bfd = info->input_bfds, top_id = 0;
4610 input_bfd != NULL;
4611 input_bfd = input_bfd->link_next)
4612 {
4613 for (section = input_bfd->sections;
4614 section != NULL;
4615 section = section->next)
4616 {
4617 if (top_id < section->id)
4618 top_id = section->id;
4619 }
4620 }
4621
4622 amt = sizeof (struct map_stub) * (top_id + 1);
4623 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
4624 if (htab->stub_group == NULL)
4625 return -1;
4626
4627 /* We can't use output_bfd->section_count here to find the top output
4628 section index as some sections may have been removed, and
4629 _bfd_strip_section_from_output doesn't renumber the indices. */
4630 for (section = output_bfd->sections, top_index = 0;
4631 section != NULL;
4632 section = section->next)
4633 {
4634 if (top_index < section->index)
4635 top_index = section->index;
4636 }
4637
4638 htab->top_index = top_index;
4639 amt = sizeof (asection *) * (top_index + 1);
4640 input_list = (asection **) bfd_malloc (amt);
4641 htab->input_list = input_list;
4642 if (input_list == NULL)
4643 return -1;
4644
4645 /* For sections we aren't interested in, mark their entries with a
4646 value we can check later. */
4647 list = input_list + top_index;
4648 do
4649 *list = bfd_abs_section_ptr;
4650 while (list-- != input_list);
4651
4652 for (section = output_bfd->sections;
4653 section != NULL;
4654 section = section->next)
4655 {
4656 if ((section->flags & SEC_CODE) != 0)
4657 input_list[section->index] = NULL;
4658 }
4659
4660 return 1;
4661 }
4662
4663 /* The linker repeatedly calls this function for each input section,
4664 in the order that input sections are linked into output sections.
4665 Build lists of input sections to determine groupings between which
4666 we may insert linker stubs. */
4667
4668 void
4669 ppc64_elf_next_input_section (info, isec)
4670 struct bfd_link_info *info;
4671 asection *isec;
4672 {
4673 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4674
4675 if (isec->output_section->index <= htab->top_index)
4676 {
4677 asection **list = htab->input_list + isec->output_section->index;
4678 if (*list != bfd_abs_section_ptr)
4679 {
4680 /* Steal the link_sec pointer for our list. */
4681 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4682 /* This happens to make the list in reverse order,
4683 which is what we want. */
4684 PREV_SEC (isec) = *list;
4685 *list = isec;
4686 }
4687 }
4688 }
4689
4690 /* See whether we can group stub sections together. Grouping stub
4691 sections may result in fewer stubs. More importantly, we need to
4692 put all .init* and .fini* stubs at the beginning of the .init or
4693 .fini output sections respectively, because glibc splits the
4694 _init and _fini functions into multiple parts. Putting a stub in
4695 the middle of a function is not a good idea. */
4696
4697 static void
4698 group_sections (htab, stub_group_size, stubs_always_before_branch)
4699 struct ppc_link_hash_table *htab;
4700 bfd_size_type stub_group_size;
4701 boolean stubs_always_before_branch;
4702 {
4703 asection **list = htab->input_list + htab->top_index;
4704 do
4705 {
4706 asection *tail = *list;
4707 if (tail == bfd_abs_section_ptr)
4708 continue;
4709 while (tail != NULL)
4710 {
4711 asection *curr;
4712 asection *prev;
4713 bfd_size_type total;
4714
4715 curr = tail;
4716 if (tail->_cooked_size)
4717 total = tail->_cooked_size;
4718 else
4719 total = tail->_raw_size;
4720 while ((prev = PREV_SEC (curr)) != NULL
4721 && ((total += curr->output_offset - prev->output_offset)
4722 < stub_group_size))
4723 curr = prev;
4724
4725 /* OK, the size from the start of CURR to the end is less
4726 than stub_group_size and thus can be handled by one stub
4727 section. (or the tail section is itself larger than
4728 stub_group_size, in which case we may be toast.) We
4729 should really be keeping track of the total size of stubs
4730 added here, as stubs contribute to the final output
4731 section size. That's a little tricky, and this way will
4732 only break if stubs added make the total size more than
4733 2^25, ie. for the default stub_group_size, if stubs total
4734 more than 2834432 bytes, or over 100000 plt call stubs. */
4735 do
4736 {
4737 prev = PREV_SEC (tail);
4738 /* Set up this stub group. */
4739 htab->stub_group[tail->id].link_sec = curr;
4740 }
4741 while (tail != curr && (tail = prev) != NULL);
4742
4743 /* But wait, there's more! Input sections up to stub_group_size
4744 bytes before the stub section can be handled by it too. */
4745 if (!stubs_always_before_branch)
4746 {
4747 total = 0;
4748 while (prev != NULL
4749 && ((total += tail->output_offset - prev->output_offset)
4750 < stub_group_size))
4751 {
4752 tail = prev;
4753 prev = PREV_SEC (tail);
4754 htab->stub_group[tail->id].link_sec = curr;
4755 }
4756 }
4757 tail = prev;
4758 }
4759 }
4760 while (list-- != htab->input_list);
4761 free (htab->input_list);
4762 #undef PREV_SEC
4763 }
4764
4765 /* Determine and set the size of the stub section for a final link.
4766
4767 The basic idea here is to examine all the relocations looking for
4768 PC-relative calls to a target that is unreachable with a "bl"
4769 instruction. */
4770
4771 boolean
4772 ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size,
4773 add_stub_section, layout_sections_again)
4774 bfd *output_bfd;
4775 bfd *stub_bfd;
4776 struct bfd_link_info *info;
4777 bfd_signed_vma group_size;
4778 asection * (*add_stub_section) PARAMS ((const char *, asection *));
4779 void (*layout_sections_again) PARAMS ((void));
4780 {
4781 bfd_size_type stub_group_size;
4782 boolean stubs_always_before_branch;
4783 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4784
4785 /* Stash our params away. */
4786 htab->stub_bfd = stub_bfd;
4787 htab->add_stub_section = add_stub_section;
4788 htab->layout_sections_again = layout_sections_again;
4789 stubs_always_before_branch = group_size < 0;
4790 if (group_size < 0)
4791 stub_group_size = -group_size;
4792 else
4793 stub_group_size = group_size;
4794 if (stub_group_size == 1)
4795 {
4796 /* Default values. */
4797 stub_group_size = 30720000;
4798 if (htab->has_14bit_branch)
4799 stub_group_size = 30000;
4800 }
4801
4802 group_sections (htab, stub_group_size, stubs_always_before_branch);
4803
4804 while (1)
4805 {
4806 bfd *input_bfd;
4807 unsigned int bfd_indx;
4808 asection *stub_sec;
4809 boolean stub_changed;
4810
4811 htab->stub_iteration += 1;
4812 stub_changed = false;
4813
4814 for (input_bfd = info->input_bfds, bfd_indx = 0;
4815 input_bfd != NULL;
4816 input_bfd = input_bfd->link_next, bfd_indx++)
4817 {
4818 Elf_Internal_Shdr *symtab_hdr;
4819 asection *section;
4820 Elf_Internal_Sym *local_syms = NULL;
4821
4822 /* We'll need the symbol table in a second. */
4823 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4824 if (symtab_hdr->sh_info == 0)
4825 continue;
4826
4827 /* Walk over each section attached to the input bfd. */
4828 for (section = input_bfd->sections;
4829 section != NULL;
4830 section = section->next)
4831 {
4832 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4833
4834 /* If there aren't any relocs, then there's nothing more
4835 to do. */
4836 if ((section->flags & SEC_RELOC) == 0
4837 || section->reloc_count == 0)
4838 continue;
4839
4840 /* If this section is a link-once section that will be
4841 discarded, then don't create any stubs. */
4842 if (section->output_section == NULL
4843 || section->output_section->owner != output_bfd)
4844 continue;
4845
4846 /* Get the relocs. */
4847 internal_relocs
4848 = _bfd_elf64_link_read_relocs (input_bfd, section, NULL,
4849 (Elf_Internal_Rela *) NULL,
4850 info->keep_memory);
4851 if (internal_relocs == NULL)
4852 goto error_ret_free_local;
4853
4854 /* Now examine each relocation. */
4855 irela = internal_relocs;
4856 irelaend = irela + section->reloc_count;
4857 for (; irela < irelaend; irela++)
4858 {
4859 unsigned int r_type, r_indx;
4860 enum ppc_stub_type stub_type;
4861 struct ppc_stub_hash_entry *stub_entry;
4862 asection *sym_sec;
4863 bfd_vma sym_value;
4864 bfd_vma destination;
4865 struct ppc_link_hash_entry *hash;
4866 char *stub_name;
4867 const asection *id_sec;
4868
4869 r_type = ELF64_R_TYPE (irela->r_info);
4870 r_indx = ELF64_R_SYM (irela->r_info);
4871
4872 if (r_type >= (unsigned int) R_PPC_max)
4873 {
4874 bfd_set_error (bfd_error_bad_value);
4875 goto error_ret_free_internal;
4876 }
4877
4878 /* Only look for stubs on branch instructions. */
4879 if (r_type != (unsigned int) R_PPC64_REL24
4880 && r_type != (unsigned int) R_PPC64_REL14
4881 && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN
4882 && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN)
4883 continue;
4884
4885 /* Now determine the call target, its name, value,
4886 section. */
4887 sym_sec = NULL;
4888 sym_value = 0;
4889 destination = 0;
4890 hash = NULL;
4891 if (r_indx < symtab_hdr->sh_info)
4892 {
4893 /* It's a local symbol. */
4894 Elf_Internal_Sym *sym;
4895 Elf_Internal_Shdr *hdr;
4896
4897 if (local_syms == NULL)
4898 {
4899 local_syms
4900 = (Elf_Internal_Sym *) symtab_hdr->contents;
4901 if (local_syms == NULL)
4902 local_syms
4903 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
4904 symtab_hdr->sh_info, 0,
4905 NULL, NULL, NULL);
4906 if (local_syms == NULL)
4907 goto error_ret_free_internal;
4908 }
4909 sym = local_syms + r_indx;
4910 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
4911 sym_sec = hdr->bfd_section;
4912 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4913 sym_value = sym->st_value;
4914 destination = (sym_value + irela->r_addend
4915 + sym_sec->output_offset
4916 + sym_sec->output_section->vma);
4917 }
4918 else
4919 {
4920 /* It's an external symbol. */
4921 int e_indx;
4922
4923 e_indx = r_indx - symtab_hdr->sh_info;
4924 hash = ((struct ppc_link_hash_entry *)
4925 elf_sym_hashes (input_bfd)[e_indx]);
4926
4927 while (hash->elf.root.type == bfd_link_hash_indirect
4928 || hash->elf.root.type == bfd_link_hash_warning)
4929 hash = ((struct ppc_link_hash_entry *)
4930 hash->elf.root.u.i.link);
4931
4932 if (hash->elf.root.type == bfd_link_hash_defined
4933 || hash->elf.root.type == bfd_link_hash_defweak)
4934 {
4935 sym_sec = hash->elf.root.u.def.section;
4936 sym_value = hash->elf.root.u.def.value;
4937 if (sym_sec->output_section != NULL)
4938 destination = (sym_value + irela->r_addend
4939 + sym_sec->output_offset
4940 + sym_sec->output_section->vma);
4941 }
4942 else if (hash->elf.root.type == bfd_link_hash_undefweak)
4943 ;
4944 else if (hash->elf.root.type == bfd_link_hash_undefined)
4945 ;
4946 else
4947 {
4948 bfd_set_error (bfd_error_bad_value);
4949 goto error_ret_free_internal;
4950 }
4951 }
4952
4953 /* Determine what (if any) linker stub is needed. */
4954 stub_type = ppc_type_of_stub (section, irela, &hash,
4955 destination);
4956 if (stub_type == ppc_stub_none)
4957 continue;
4958
4959 /* Support for grouping stub sections. */
4960 id_sec = htab->stub_group[section->id].link_sec;
4961
4962 /* Get the name of this stub. */
4963 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
4964 if (!stub_name)
4965 goto error_ret_free_internal;
4966
4967 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4968 stub_name, false, false);
4969 if (stub_entry != NULL)
4970 {
4971 /* The proper stub has already been created. */
4972 free (stub_name);
4973 continue;
4974 }
4975
4976 stub_entry = ppc_add_stub (stub_name, section, htab);
4977 if (stub_entry == NULL)
4978 {
4979 free (stub_name);
4980 error_ret_free_internal:
4981 if (elf_section_data (section)->relocs == NULL)
4982 free (internal_relocs);
4983 error_ret_free_local:
4984 if (local_syms != NULL
4985 && (symtab_hdr->contents
4986 != (unsigned char *) local_syms))
4987 free (local_syms);
4988 return false;
4989 }
4990
4991 stub_entry->target_value = sym_value;
4992 stub_entry->target_section = sym_sec;
4993 stub_entry->stub_type = stub_type;
4994 stub_entry->h = hash;
4995 stub_changed = true;
4996 }
4997
4998 /* We're done with the internal relocs, free them. */
4999 if (elf_section_data (section)->relocs != internal_relocs)
5000 free (internal_relocs);
5001 }
5002
5003 if (local_syms != NULL
5004 && symtab_hdr->contents != (unsigned char *) local_syms)
5005 {
5006 if (!info->keep_memory)
5007 free (local_syms);
5008 else
5009 symtab_hdr->contents = (unsigned char *) local_syms;
5010 }
5011 }
5012
5013 if (!stub_changed)
5014 break;
5015
5016 /* OK, we've added some stubs. Find out the new size of the
5017 stub sections. */
5018 for (stub_sec = htab->stub_bfd->sections;
5019 stub_sec != NULL;
5020 stub_sec = stub_sec->next)
5021 {
5022 stub_sec->_raw_size = 0;
5023 stub_sec->_cooked_size = 0;
5024 }
5025 htab->sbrlt->_raw_size = 0;
5026 htab->sbrlt->_cooked_size = 0;
5027
5028 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
5029
5030 /* Ask the linker to do its stuff. */
5031 (*htab->layout_sections_again) ();
5032 }
5033
5034 /* It would be nice to strip .branch_lt from the output if the
5035 section is empty, but it's too late. If we strip sections here,
5036 the dynamic symbol table is corrupted since the section symbol
5037 for the stripped section isn't written. */
5038
5039 return true;
5040 }
5041
5042 /* Called after we have determined section placement. If sections
5043 move, we'll be called again. Provide a value for TOCstart. */
5044
5045 bfd_vma
5046 ppc64_elf_toc (obfd)
5047 bfd *obfd;
5048 {
5049 asection *s;
5050 bfd_vma TOCstart;
5051
5052 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
5053 order. The TOC starts where the first of these sections starts. */
5054 s = bfd_get_section_by_name (obfd, ".got");
5055 if (s == NULL)
5056 s = bfd_get_section_by_name (obfd, ".toc");
5057 if (s == NULL)
5058 s = bfd_get_section_by_name (obfd, ".tocbss");
5059 if (s == NULL)
5060 s = bfd_get_section_by_name (obfd, ".plt");
5061 if (s == NULL)
5062 {
5063 /* This may happen for
5064 o references to TOC base (SYM@toc / TOC[tc0]) without a
5065 .toc directive
5066 o bad linker script
5067 o --gc-sections and empty TOC sections
5068
5069 FIXME: Warn user? */
5070
5071 /* Look for a likely section. We probably won't even be
5072 using TOCstart. */
5073 for (s = obfd->sections; s != NULL; s = s->next)
5074 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
5075 == (SEC_ALLOC | SEC_SMALL_DATA))
5076 break;
5077 if (s == NULL)
5078 for (s = obfd->sections; s != NULL; s = s->next)
5079 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
5080 == (SEC_ALLOC | SEC_SMALL_DATA))
5081 break;
5082 if (s == NULL)
5083 for (s = obfd->sections; s != NULL; s = s->next)
5084 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
5085 break;
5086 if (s == NULL)
5087 for (s = obfd->sections; s != NULL; s = s->next)
5088 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
5089 break;
5090 }
5091
5092 TOCstart = 0;
5093 if (s != NULL)
5094 TOCstart = s->output_section->vma + s->output_offset;
5095
5096 return TOCstart;
5097 }
5098
5099 /* Build all the stubs associated with the current output file.
5100 The stubs are kept in a hash table attached to the main linker
5101 hash table. This function is called via gldelf64ppc_finish. */
5102
5103 boolean
5104 ppc64_elf_build_stubs (info)
5105 struct bfd_link_info *info;
5106 {
5107 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5108 asection *stub_sec;
5109 bfd_vma plt_r2;
5110 bfd_byte *p;
5111
5112 for (stub_sec = htab->stub_bfd->sections;
5113 stub_sec != NULL;
5114 stub_sec = stub_sec->next)
5115 {
5116 bfd_size_type size;
5117
5118 /* Allocate memory to hold the linker stubs. */
5119 size = stub_sec->_raw_size;
5120 if (size != 0)
5121 {
5122 stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
5123 if (stub_sec->contents == NULL)
5124 return false;
5125 }
5126 stub_sec->_cooked_size = 0;
5127 }
5128
5129 if (htab->splt != NULL)
5130 {
5131 unsigned int indx;
5132
5133 /* Build the .glink plt call stub. */
5134 plt_r2 = (htab->splt->output_offset
5135 + htab->splt->output_section->vma
5136 - elf_gp (htab->splt->output_section->owner)
5137 - TOC_BASE_OFF);
5138 p = htab->sglink->contents;
5139 p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1);
5140 while (p < htab->sglink->contents + GLINK_CALL_STUB_SIZE)
5141 {
5142 bfd_put_32 (htab->sglink->owner, NOP, p);
5143 p += 4;
5144 }
5145
5146 /* Build the .glink lazy link call stubs. */
5147 indx = 0;
5148 while (p < htab->sglink->contents + htab->sglink->_raw_size)
5149 {
5150 if (indx < 0x8000)
5151 {
5152 bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p);
5153 p += 4;
5154 }
5155 else
5156 {
5157 bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p);
5158 p += 4;
5159 bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
5160 p += 4;
5161 }
5162 bfd_put_32 (htab->sglink->owner,
5163 B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p);
5164 indx++;
5165 p += 4;
5166 }
5167 htab->sglink->_cooked_size = p - htab->sglink->contents;
5168 }
5169
5170 if (htab->sbrlt->_raw_size != 0)
5171 {
5172 htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
5173 htab->sbrlt->_raw_size);
5174 if (htab->sbrlt->contents == NULL)
5175 return false;
5176 }
5177
5178 /* Build the stubs as directed by the stub hash table. */
5179 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
5180
5181 for (stub_sec = htab->stub_bfd->sections;
5182 stub_sec != NULL;
5183 stub_sec = stub_sec->next)
5184 {
5185 if (stub_sec->_raw_size != stub_sec->_cooked_size)
5186 break;
5187 }
5188
5189 if (stub_sec != NULL
5190 || htab->sglink->_raw_size != htab->sglink->_cooked_size)
5191 {
5192 htab->stub_error = true;
5193 (*_bfd_error_handler) (_("stubs don't match calculated size"));
5194 }
5195
5196 return !htab->stub_error;
5197 }
5198
5199 /* The RELOCATE_SECTION function is called by the ELF backend linker
5200 to handle the relocations for a section.
5201
5202 The relocs are always passed as Rela structures; if the section
5203 actually uses Rel structures, the r_addend field will always be
5204 zero.
5205
5206 This function is responsible for adjust the section contents as
5207 necessary, and (if using Rela relocs and generating a
5208 relocateable output file) adjusting the reloc addend as
5209 necessary.
5210
5211 This function does not have to worry about setting the reloc
5212 address or the reloc symbol index.
5213
5214 LOCAL_SYMS is a pointer to the swapped in local symbols.
5215
5216 LOCAL_SECTIONS is an array giving the section in the input file
5217 corresponding to the st_shndx field of each local symbol.
5218
5219 The global hash table entry for the global symbols can be found
5220 via elf_sym_hashes (input_bfd).
5221
5222 When generating relocateable output, this function must handle
5223 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5224 going to be the section symbol corresponding to the output
5225 section, which means that the addend must be adjusted
5226 accordingly. */
5227
5228 static boolean
5229 ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
5230 contents, relocs, local_syms, local_sections)
5231 bfd *output_bfd;
5232 struct bfd_link_info *info;
5233 bfd *input_bfd;
5234 asection *input_section;
5235 bfd_byte *contents;
5236 Elf_Internal_Rela *relocs;
5237 Elf_Internal_Sym *local_syms;
5238 asection **local_sections;
5239 {
5240 struct ppc_link_hash_table *htab;
5241 Elf_Internal_Shdr *symtab_hdr;
5242 struct elf_link_hash_entry **sym_hashes;
5243 Elf_Internal_Rela *rel;
5244 Elf_Internal_Rela *relend;
5245 bfd_vma *local_got_offsets;
5246 bfd_vma TOCstart;
5247 boolean ret = true;
5248 boolean is_opd;
5249 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
5250 boolean is_power4 = false;
5251
5252 if (info->relocateable)
5253 return true;
5254
5255 /* Initialize howto table if needed. */
5256 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5257 ppc_howto_init ();
5258
5259 htab = ppc_hash_table (info);
5260 local_got_offsets = elf_local_got_offsets (input_bfd);
5261 TOCstart = elf_gp (output_bfd);
5262 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5263 sym_hashes = elf_sym_hashes (input_bfd);
5264 is_opd = elf_section_data (input_section)->tdata != NULL;
5265
5266 rel = relocs;
5267 relend = relocs + input_section->reloc_count;
5268 for (; rel < relend; rel++)
5269 {
5270 enum elf_ppc_reloc_type r_type;
5271 bfd_vma offset;
5272 bfd_vma addend;
5273 bfd_reloc_status_type r;
5274 Elf_Internal_Sym *sym;
5275 asection *sec;
5276 struct elf_link_hash_entry *h;
5277 struct elf_link_hash_entry *fdh;
5278 const char *sym_name;
5279 unsigned long r_symndx;
5280 bfd_vma relocation;
5281 boolean unresolved_reloc;
5282 boolean warned;
5283 long insn;
5284 struct ppc_stub_hash_entry *stub_entry;
5285 bfd_vma max_br_offset;
5286 bfd_vma from;
5287
5288 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
5289 r_symndx = ELF64_R_SYM (rel->r_info);
5290 offset = rel->r_offset;
5291 addend = rel->r_addend;
5292 r = bfd_reloc_other;
5293 sym = (Elf_Internal_Sym *) 0;
5294 sec = (asection *) 0;
5295 h = (struct elf_link_hash_entry *) 0;
5296 sym_name = (const char *) 0;
5297 unresolved_reloc = false;
5298 warned = false;
5299
5300 if (r_type == R_PPC64_TOC)
5301 {
5302 /* Relocation value is TOC base. Symbol is ignored. */
5303 relocation = TOCstart + TOC_BASE_OFF;
5304 }
5305 else if (r_symndx < symtab_hdr->sh_info)
5306 {
5307 /* It's a local symbol. */
5308 sym = local_syms + r_symndx;
5309 sec = local_sections[r_symndx];
5310 sym_name = "<local symbol>";
5311
5312 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
5313 /* rel may have changed, update our copy of addend. */
5314 addend = rel->r_addend;
5315
5316 if (elf_section_data (sec) != NULL)
5317 {
5318 long *opd_sym_adjust;
5319
5320 opd_sym_adjust = (long *) elf_section_data (sec)->tdata;
5321 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
5322 relocation += opd_sym_adjust[sym->st_value / 24];
5323 }
5324 }
5325 else
5326 {
5327 /* It's a global symbol. */
5328 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5329 while (h->root.type == bfd_link_hash_indirect
5330 || h->root.type == bfd_link_hash_warning)
5331 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5332 sym_name = h->root.root.string;
5333 relocation = 0;
5334 if (h->root.type == bfd_link_hash_defined
5335 || h->root.type == bfd_link_hash_defweak)
5336 {
5337 sec = h->root.u.def.section;
5338 if (sec->output_section == NULL)
5339 /* Set a flag that will be cleared later if we find a
5340 relocation value for this symbol. output_section
5341 is typically NULL for symbols satisfied by a shared
5342 library. */
5343 unresolved_reloc = true;
5344 else
5345 relocation = (h->root.u.def.value
5346 + sec->output_section->vma
5347 + sec->output_offset);
5348 }
5349 else if (h->root.type == bfd_link_hash_undefweak)
5350 ;
5351 else if (info->shared
5352 && (!info->symbolic || info->allow_shlib_undefined)
5353 && !info->no_undefined
5354 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5355 ;
5356 else
5357 {
5358 if (! ((*info->callbacks->undefined_symbol)
5359 (info, h->root.root.string, input_bfd, input_section,
5360 offset, (!info->shared
5361 || info->no_undefined
5362 || ELF_ST_VISIBILITY (h->other)))))
5363 return false;
5364 warned = true;
5365 }
5366 }
5367
5368 /* First handle relocations that tweak non-addend part of insn. */
5369 insn = 0;
5370 switch (r_type)
5371 {
5372 default:
5373 break;
5374
5375 /* Branch taken prediction relocations. */
5376 case R_PPC64_ADDR14_BRTAKEN:
5377 case R_PPC64_REL14_BRTAKEN:
5378 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
5379 /* Fall thru. */
5380
5381 /* Branch not taken prediction relocations. */
5382 case R_PPC64_ADDR14_BRNTAKEN:
5383 case R_PPC64_REL14_BRNTAKEN:
5384 insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21);
5385 if (is_power4)
5386 {
5387 /* Set 'a' bit. This is 0b00010 in BO field for branch
5388 on CR(BI) insns (BO == 001at or 011at), and 0b01000
5389 for branch on CTR insns (BO == 1a00t or 1a01t). */
5390 if ((insn & (0x14 << 21)) == (0x04 << 21))
5391 insn |= 0x02 << 21;
5392 else if ((insn & (0x14 << 21)) == (0x10 << 21))
5393 insn |= 0x08 << 21;
5394 else
5395 break;
5396 }
5397 else
5398 {
5399 from = (offset
5400 + input_section->output_offset
5401 + input_section->output_section->vma);
5402
5403 /* Invert 'y' bit if not the default. */
5404 if ((bfd_signed_vma) (relocation + addend - from) < 0)
5405 insn ^= 0x01 << 21;
5406 }
5407
5408 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
5409 break;
5410
5411 case R_PPC64_REL24:
5412 /* A REL24 branching to a linkage function is followed by a
5413 nop. We replace the nop with a ld in order to restore
5414 the TOC base pointer. Only calls to shared objects need
5415 to alter the TOC base. These are recognized by their
5416 need for a PLT entry. */
5417 if (h != NULL
5418 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
5419 && fdh->plt.offset != (bfd_vma) -1
5420 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
5421 rel, htab)) != NULL)
5422 {
5423 boolean can_plt_call = 0;
5424
5425 if (offset + 8 <= input_section->_cooked_size)
5426 {
5427 insn = bfd_get_32 (input_bfd, contents + offset + 4);
5428 if (insn == NOP
5429 || insn == CROR_151515 || insn == CROR_313131)
5430 {
5431 bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1,
5432 contents + offset + 4);
5433 can_plt_call = 1;
5434 }
5435 }
5436
5437 if (!can_plt_call)
5438 {
5439 /* If this is a plain branch rather than a branch
5440 and link, don't require a nop. */
5441 insn = bfd_get_32 (input_bfd, contents + offset);
5442 if ((insn & 1) == 0)
5443 can_plt_call = 1;
5444 }
5445
5446 if (can_plt_call)
5447 {
5448 relocation = (stub_entry->stub_offset
5449 + stub_entry->stub_sec->output_offset
5450 + stub_entry->stub_sec->output_section->vma);
5451 addend = 0;
5452 unresolved_reloc = false;
5453 }
5454 }
5455
5456 if (h != NULL
5457 && h->root.type == bfd_link_hash_undefweak
5458 && relocation == 0
5459 && addend == 0)
5460 {
5461 /* Tweak calls to undefined weak functions to point at a
5462 blr. We can thus call a weak function without first
5463 checking whether the function is defined. We have a
5464 blr at the end of .sfpr. */
5465 BFD_ASSERT (htab->sfpr->_raw_size != 0);
5466 relocation = (htab->sfpr->_raw_size - 4
5467 + htab->sfpr->output_offset
5468 + htab->sfpr->output_section->vma);
5469 from = (offset
5470 + input_section->output_offset
5471 + input_section->output_section->vma);
5472
5473 /* But let's not be silly about it. If the blr isn't in
5474 reach, just go to the next instruction. */
5475 if (relocation - from + (1 << 25) >= (1 << 26)
5476 || htab->sfpr->_raw_size == 0)
5477 relocation = from + 4;
5478 }
5479 break;
5480 }
5481
5482 /* Set `addend'. */
5483 switch (r_type)
5484 {
5485 default:
5486 (*_bfd_error_handler)
5487 (_("%s: unknown relocation type %d for symbol %s"),
5488 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
5489
5490 bfd_set_error (bfd_error_bad_value);
5491 ret = false;
5492 continue;
5493
5494 case R_PPC64_NONE:
5495 case R_PPC_GNU_VTINHERIT:
5496 case R_PPC_GNU_VTENTRY:
5497 continue;
5498
5499 /* GOT16 relocations. Like an ADDR16 using the symbol's
5500 address in the GOT as relocation value instead of the
5501 symbols value itself. Also, create a GOT entry for the
5502 symbol and put the symbol value there. */
5503 case R_PPC64_GOT16:
5504 case R_PPC64_GOT16_LO:
5505 case R_PPC64_GOT16_HI:
5506 case R_PPC64_GOT16_HA:
5507 case R_PPC64_GOT16_DS:
5508 case R_PPC64_GOT16_LO_DS:
5509 {
5510 /* Relocation is to the entry for this symbol in the global
5511 offset table. */
5512 bfd_vma off;
5513
5514 if (htab->sgot == NULL)
5515 abort ();
5516
5517 if (h != NULL)
5518 {
5519 boolean dyn;
5520
5521 off = h->got.offset;
5522 dyn = htab->elf.dynamic_sections_created;
5523 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
5524 || (info->shared
5525 && (info->symbolic
5526 || h->dynindx == -1
5527 || (h->elf_link_hash_flags
5528 & ELF_LINK_FORCED_LOCAL))
5529 && (h->elf_link_hash_flags
5530 & ELF_LINK_HASH_DEF_REGULAR)))
5531 {
5532 /* This is actually a static link, or it is a
5533 -Bsymbolic link and the symbol is defined
5534 locally, or the symbol was forced to be local
5535 because of a version file. We must initialize
5536 this entry in the global offset table. Since the
5537 offset must always be a multiple of 8, we use the
5538 least significant bit to record whether we have
5539 initialized it already.
5540
5541 When doing a dynamic link, we create a .rel.got
5542 relocation entry to initialize the value. This
5543 is done in the finish_dynamic_symbol routine. */
5544 if ((off & 1) != 0)
5545 off &= ~1;
5546 else
5547 {
5548 bfd_put_64 (output_bfd, relocation,
5549 htab->sgot->contents + off);
5550 h->got.offset |= 1;
5551 }
5552 }
5553 else
5554 unresolved_reloc = false;
5555 }
5556 else
5557 {
5558 if (local_got_offsets == NULL)
5559 abort ();
5560
5561 off = local_got_offsets[r_symndx];
5562
5563 /* The offset must always be a multiple of 8. We use
5564 the least significant bit to record whether we have
5565 already processed this entry. */
5566 if ((off & 1) != 0)
5567 off &= ~1;
5568 else
5569 {
5570 bfd_put_64 (output_bfd, relocation,
5571 htab->sgot->contents + off);
5572
5573 if (info->shared)
5574 {
5575 Elf_Internal_Rela outrel;
5576 Elf64_External_Rela *loc;
5577
5578 /* We need to generate a R_PPC64_RELATIVE reloc
5579 for the dynamic linker. */
5580 outrel.r_offset = (htab->sgot->output_section->vma
5581 + htab->sgot->output_offset
5582 + off);
5583 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
5584 outrel.r_addend = relocation;
5585 loc = (Elf64_External_Rela *) htab->srelgot->contents;
5586 loc += htab->srelgot->reloc_count++;
5587 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
5588 }
5589
5590 local_got_offsets[r_symndx] |= 1;
5591 }
5592 }
5593
5594 if (off >= (bfd_vma) -2)
5595 abort ();
5596
5597 relocation = htab->sgot->output_offset + off;
5598
5599 /* TOC base (r2) is TOC start plus 0x8000. */
5600 addend -= TOC_BASE_OFF;
5601 }
5602 break;
5603
5604 case R_PPC64_PLT16_HA:
5605 case R_PPC64_PLT16_HI:
5606 case R_PPC64_PLT16_LO:
5607 case R_PPC64_PLT32:
5608 case R_PPC64_PLT64:
5609 /* Relocation is to the entry for this symbol in the
5610 procedure linkage table. */
5611
5612 /* Resolve a PLT reloc against a local symbol directly,
5613 without using the procedure linkage table. */
5614 if (h == NULL)
5615 break;
5616
5617 if (h->plt.offset == (bfd_vma) -1
5618 || htab->splt == NULL)
5619 {
5620 /* We didn't make a PLT entry for this symbol. This
5621 happens when statically linking PIC code, or when
5622 using -Bsymbolic. */
5623 break;
5624 }
5625
5626 relocation = (htab->splt->output_section->vma
5627 + htab->splt->output_offset
5628 + h->plt.offset);
5629 unresolved_reloc = false;
5630 break;
5631
5632 /* TOC16 relocs. We want the offset relative to the TOC base,
5633 which is the address of the start of the TOC plus 0x8000.
5634 The TOC consists of sections .got, .toc, .tocbss, and .plt,
5635 in this order. */
5636 case R_PPC64_TOC16:
5637 case R_PPC64_TOC16_LO:
5638 case R_PPC64_TOC16_HI:
5639 case R_PPC64_TOC16_DS:
5640 case R_PPC64_TOC16_LO_DS:
5641 case R_PPC64_TOC16_HA:
5642 addend -= TOCstart + TOC_BASE_OFF;
5643 break;
5644
5645 /* Relocate against the beginning of the section. */
5646 case R_PPC64_SECTOFF:
5647 case R_PPC64_SECTOFF_LO:
5648 case R_PPC64_SECTOFF_HI:
5649 case R_PPC64_SECTOFF_DS:
5650 case R_PPC64_SECTOFF_LO_DS:
5651 case R_PPC64_SECTOFF_HA:
5652 if (sec != (asection *) 0)
5653 addend -= sec->output_section->vma;
5654 break;
5655
5656 case R_PPC64_REL14:
5657 case R_PPC64_REL14_BRNTAKEN:
5658 case R_PPC64_REL14_BRTAKEN:
5659 case R_PPC64_REL24:
5660 break;
5661
5662 /* Relocations that may need to be propagated if this is a
5663 dynamic object. */
5664 case R_PPC64_REL32:
5665 case R_PPC64_REL64:
5666 case R_PPC64_ADDR14:
5667 case R_PPC64_ADDR14_BRNTAKEN:
5668 case R_PPC64_ADDR14_BRTAKEN:
5669 case R_PPC64_ADDR16:
5670 case R_PPC64_ADDR16_DS:
5671 case R_PPC64_ADDR16_HA:
5672 case R_PPC64_ADDR16_HI:
5673 case R_PPC64_ADDR16_HIGHER:
5674 case R_PPC64_ADDR16_HIGHERA:
5675 case R_PPC64_ADDR16_HIGHEST:
5676 case R_PPC64_ADDR16_HIGHESTA:
5677 case R_PPC64_ADDR16_LO:
5678 case R_PPC64_ADDR16_LO_DS:
5679 case R_PPC64_ADDR24:
5680 case R_PPC64_ADDR30:
5681 case R_PPC64_ADDR32:
5682 case R_PPC64_ADDR64:
5683 case R_PPC64_UADDR16:
5684 case R_PPC64_UADDR32:
5685 case R_PPC64_UADDR64:
5686 /* r_symndx will be zero only for relocs against symbols
5687 from removed linkonce sections, or sections discarded by
5688 a linker script. */
5689 if (r_symndx == 0)
5690 break;
5691 /* Fall thru. */
5692
5693 case R_PPC64_TOC:
5694 if ((input_section->flags & SEC_ALLOC) == 0)
5695 break;
5696
5697 if (NO_OPD_RELOCS && is_opd)
5698 break;
5699
5700 if ((info->shared
5701 && (IS_ABSOLUTE_RELOC (r_type)
5702 || (h != NULL
5703 && h->dynindx != -1
5704 && (! info->symbolic
5705 || (h->elf_link_hash_flags
5706 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
5707 || (!info->shared
5708 && h != NULL
5709 && h->dynindx != -1
5710 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5711 && (((h->elf_link_hash_flags
5712 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5713 && (h->elf_link_hash_flags
5714 & ELF_LINK_HASH_DEF_REGULAR) == 0)
5715 || h->root.type == bfd_link_hash_undefweak
5716 || h->root.type == bfd_link_hash_undefined)))
5717 {
5718 Elf_Internal_Rela outrel;
5719 boolean skip, relocate;
5720 asection *sreloc;
5721 Elf64_External_Rela *loc;
5722
5723 /* When generating a dynamic object, these relocations
5724 are copied into the output file to be resolved at run
5725 time. */
5726
5727 skip = false;
5728 relocate = false;
5729
5730 outrel.r_offset =
5731 _bfd_elf_section_offset (output_bfd, info, input_section,
5732 rel->r_offset);
5733 if (outrel.r_offset == (bfd_vma) -1)
5734 skip = true;
5735 else if (outrel.r_offset == (bfd_vma) -2)
5736 skip = true, relocate = true;
5737 outrel.r_offset += (input_section->output_section->vma
5738 + input_section->output_offset);
5739 outrel.r_addend = addend;
5740
5741 if (skip)
5742 memset (&outrel, 0, sizeof outrel);
5743 else if (h != NULL
5744 && h->dynindx != -1
5745 && !is_opd
5746 && (!IS_ABSOLUTE_RELOC (r_type)
5747 || !info->shared
5748 || !info->symbolic
5749 || (h->elf_link_hash_flags
5750 & ELF_LINK_HASH_DEF_REGULAR) == 0))
5751 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
5752 else
5753 {
5754 /* This symbol is local, or marked to become local,
5755 or this is an opd section reloc which must point
5756 at a local function. */
5757 outrel.r_addend += relocation;
5758 relocate = true;
5759 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
5760 {
5761 if (is_opd && h != NULL)
5762 {
5763 /* Lie about opd entries. This case occurs
5764 when building shared libraries and we
5765 reference a function in another shared
5766 lib. The same thing happens for a weak
5767 definition in an application that's
5768 overridden by a strong definition in a
5769 shared lib. (I believe this is a generic
5770 bug in binutils handling of weak syms.)
5771 In these cases we won't use the opd
5772 entry in this lib. */
5773 unresolved_reloc = false;
5774 }
5775 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
5776 }
5777 else
5778 {
5779 long indx = 0;
5780
5781 if (bfd_is_abs_section (sec))
5782 ;
5783 else if (sec == NULL || sec->owner == NULL)
5784 {
5785 bfd_set_error (bfd_error_bad_value);
5786 return false;
5787 }
5788 else
5789 {
5790 asection *osec;
5791
5792 osec = sec->output_section;
5793 indx = elf_section_data (osec)->dynindx;
5794
5795 /* We are turning this relocation into one
5796 against a section symbol, so subtract out
5797 the output section's address but not the
5798 offset of the input section in the output
5799 section. */
5800 outrel.r_addend -= osec->vma;
5801 }
5802
5803 outrel.r_info = ELF64_R_INFO (indx, r_type);
5804 }
5805 }
5806
5807 sreloc = elf_section_data (input_section)->sreloc;
5808 if (sreloc == NULL)
5809 abort ();
5810
5811 loc = (Elf64_External_Rela *) sreloc->contents;
5812 loc += sreloc->reloc_count++;
5813 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
5814
5815 /* If this reloc is against an external symbol, it will
5816 be computed at runtime, so there's no need to do
5817 anything now. */
5818 if (! relocate)
5819 continue;
5820 }
5821 break;
5822
5823 case R_PPC64_COPY:
5824 case R_PPC64_GLOB_DAT:
5825 case R_PPC64_JMP_SLOT:
5826 case R_PPC64_RELATIVE:
5827 /* We shouldn't ever see these dynamic relocs in relocatable
5828 files. */
5829 /* Fall thru */
5830
5831 case R_PPC64_PLTGOT16:
5832 case R_PPC64_PLTGOT16_DS:
5833 case R_PPC64_PLTGOT16_HA:
5834 case R_PPC64_PLTGOT16_HI:
5835 case R_PPC64_PLTGOT16_LO:
5836 case R_PPC64_PLTGOT16_LO_DS:
5837 case R_PPC64_PLTREL32:
5838 case R_PPC64_PLTREL64:
5839 /* These ones haven't been implemented yet. */
5840
5841 (*_bfd_error_handler)
5842 (_("%s: Relocation %s is not supported for symbol %s."),
5843 bfd_archive_filename (input_bfd),
5844 ppc64_elf_howto_table[(int) r_type]->name, sym_name);
5845
5846 bfd_set_error (bfd_error_invalid_operation);
5847 ret = false;
5848 continue;
5849 }
5850
5851 /* Do any further special processing. */
5852 switch (r_type)
5853 {
5854 default:
5855 break;
5856
5857 case R_PPC64_ADDR16_HA:
5858 case R_PPC64_ADDR16_HIGHERA:
5859 case R_PPC64_ADDR16_HIGHESTA:
5860 case R_PPC64_PLT16_HA:
5861 case R_PPC64_TOC16_HA:
5862 case R_PPC64_SECTOFF_HA:
5863 /* It's just possible that this symbol is a weak symbol
5864 that's not actually defined anywhere. In that case,
5865 'sec' would be NULL, and we should leave the symbol
5866 alone (it will be set to zero elsewhere in the link). */
5867 if (sec != NULL)
5868 /* Add 0x10000 if sign bit in 0:15 is set. */
5869 addend += ((relocation + addend) & 0x8000) << 1;
5870 break;
5871
5872 case R_PPC64_ADDR16_DS:
5873 case R_PPC64_ADDR16_LO_DS:
5874 case R_PPC64_GOT16_DS:
5875 case R_PPC64_GOT16_LO_DS:
5876 case R_PPC64_PLT16_LO_DS:
5877 case R_PPC64_SECTOFF_DS:
5878 case R_PPC64_SECTOFF_LO_DS:
5879 case R_PPC64_TOC16_DS:
5880 case R_PPC64_TOC16_LO_DS:
5881 case R_PPC64_PLTGOT16_DS:
5882 case R_PPC64_PLTGOT16_LO_DS:
5883 if (((relocation + addend) & 3) != 0)
5884 {
5885 (*_bfd_error_handler)
5886 (_("%s: error: relocation %s not a multiple of 4"),
5887 bfd_archive_filename (input_bfd),
5888 ppc64_elf_howto_table[(int) r_type]->name);
5889 bfd_set_error (bfd_error_bad_value);
5890 ret = false;
5891 continue;
5892 }
5893 break;
5894
5895 case R_PPC64_REL14:
5896 case R_PPC64_REL14_BRNTAKEN:
5897 case R_PPC64_REL14_BRTAKEN:
5898 max_br_offset = 1 << 15;
5899 goto branch_check;
5900
5901 case R_PPC64_REL24:
5902 max_br_offset = 1 << 25;
5903
5904 branch_check:
5905 /* If the branch is out of reach, then redirect the
5906 call to the local stub for this function. */
5907 from = (offset
5908 + input_section->output_offset
5909 + input_section->output_section->vma);
5910 if (relocation + addend - from + max_br_offset >= 2 * max_br_offset
5911 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
5912 rel, htab)) != NULL)
5913 {
5914 /* Munge up the value and addend so that we call the stub
5915 rather than the procedure directly. */
5916 relocation = (stub_entry->stub_offset
5917 + stub_entry->stub_sec->output_offset
5918 + stub_entry->stub_sec->output_section->vma);
5919 addend = 0;
5920 }
5921 break;
5922 }
5923
5924 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5925 because such sections are not SEC_ALLOC and thus ld.so will
5926 not process them. */
5927 if (unresolved_reloc
5928 && !((input_section->flags & SEC_DEBUGGING) != 0
5929 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
5930 {
5931 (*_bfd_error_handler)
5932 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
5933 bfd_archive_filename (input_bfd),
5934 bfd_get_section_name (input_bfd, input_section),
5935 (long) rel->r_offset,
5936 h->root.root.string);
5937 ret = false;
5938 }
5939
5940 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
5941 input_bfd,
5942 input_section,
5943 contents,
5944 offset,
5945 relocation,
5946 addend);
5947
5948 if (r != bfd_reloc_ok)
5949 {
5950 const char *name;
5951
5952 if (h != NULL)
5953 {
5954 if (h->root.type == bfd_link_hash_undefweak
5955 && ppc64_elf_howto_table[(int) r_type]->pc_relative)
5956 {
5957 /* Assume this is a call protected by other code that
5958 detects the symbol is undefined. If this is the case,
5959 we can safely ignore the overflow. If not, the
5960 program is hosed anyway, and a little warning isn't
5961 going to help. */
5962
5963 continue;
5964 }
5965
5966 name = h->root.root.string;
5967 }
5968 else
5969 {
5970 name = bfd_elf_string_from_elf_section (input_bfd,
5971 symtab_hdr->sh_link,
5972 sym->st_name);
5973 if (name == NULL)
5974 continue;
5975 if (*name == '\0')
5976 name = bfd_section_name (input_bfd, sec);
5977 }
5978
5979 if (r == bfd_reloc_overflow)
5980 {
5981 if (warned)
5982 continue;
5983 if (!((*info->callbacks->reloc_overflow)
5984 (info, name, ppc64_elf_howto_table[(int) r_type]->name,
5985 rel->r_addend, input_bfd, input_section, offset)))
5986 return false;
5987 }
5988 else
5989 {
5990 (*_bfd_error_handler)
5991 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
5992 bfd_archive_filename (input_bfd),
5993 bfd_get_section_name (input_bfd, input_section),
5994 (long) rel->r_offset, name, (int) r);
5995 ret = false;
5996 }
5997 }
5998 }
5999
6000 return ret;
6001 }
6002
6003 /* Finish up dynamic symbol handling. We set the contents of various
6004 dynamic sections here. */
6005
6006 static boolean
6007 ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
6008 bfd *output_bfd;
6009 struct bfd_link_info *info;
6010 struct elf_link_hash_entry *h;
6011 Elf_Internal_Sym *sym;
6012 {
6013 struct ppc_link_hash_table *htab;
6014 bfd *dynobj;
6015
6016 htab = ppc_hash_table (info);
6017 dynobj = htab->elf.dynobj;
6018
6019 if (h->plt.offset != (bfd_vma) -1
6020 && ((struct ppc_link_hash_entry *) h)->is_func_descriptor)
6021 {
6022 Elf_Internal_Rela rela;
6023 Elf64_External_Rela *loc;
6024
6025 /* This symbol has an entry in the procedure linkage table. Set
6026 it up. */
6027
6028 if (htab->splt == NULL
6029 || htab->srelplt == NULL
6030 || htab->sglink == NULL)
6031 abort ();
6032
6033 /* Create a JMP_SLOT reloc to inform the dynamic linker to
6034 fill in the PLT entry. */
6035
6036 rela.r_offset = (htab->splt->output_section->vma
6037 + htab->splt->output_offset
6038 + h->plt.offset);
6039 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
6040 rela.r_addend = 0;
6041
6042 loc = (Elf64_External_Rela *) htab->srelplt->contents;
6043 loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
6044 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6045 }
6046
6047 if (h->got.offset != (bfd_vma) -1)
6048 {
6049 Elf_Internal_Rela rela;
6050 Elf64_External_Rela *loc;
6051
6052 /* This symbol has an entry in the global offset table. Set it
6053 up. */
6054
6055 if (htab->sgot == NULL || htab->srelgot == NULL)
6056 abort ();
6057
6058 rela.r_offset = (htab->sgot->output_section->vma
6059 + htab->sgot->output_offset
6060 + (h->got.offset &~ (bfd_vma) 1));
6061
6062 /* If this is a static link, or it is a -Bsymbolic link and the
6063 symbol is defined locally or was forced to be local because
6064 of a version file, we just want to emit a RELATIVE reloc.
6065 The entry in the global offset table will already have been
6066 initialized in the relocate_section function. */
6067 if (info->shared
6068 && (info->symbolic
6069 || h->dynindx == -1
6070 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
6071 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
6072 {
6073 BFD_ASSERT((h->got.offset & 1) != 0);
6074 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6075 rela.r_addend = (h->root.u.def.value
6076 + h->root.u.def.section->output_section->vma
6077 + h->root.u.def.section->output_offset);
6078 }
6079 else
6080 {
6081 BFD_ASSERT ((h->got.offset & 1) == 0);
6082 bfd_put_64 (output_bfd, (bfd_vma) 0,
6083 htab->sgot->contents + h->got.offset);
6084 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT);
6085 rela.r_addend = 0;
6086 }
6087
6088 loc = (Elf64_External_Rela *) htab->srelgot->contents;
6089 loc += htab->srelgot->reloc_count++;
6090 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6091 }
6092
6093 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
6094 {
6095 Elf_Internal_Rela rela;
6096 Elf64_External_Rela *loc;
6097
6098 /* This symbol needs a copy reloc. Set it up. */
6099
6100 if (h->dynindx == -1
6101 || (h->root.type != bfd_link_hash_defined
6102 && h->root.type != bfd_link_hash_defweak)
6103 || htab->srelbss == NULL)
6104 abort ();
6105
6106 rela.r_offset = (h->root.u.def.value
6107 + h->root.u.def.section->output_section->vma
6108 + h->root.u.def.section->output_offset);
6109 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
6110 rela.r_addend = 0;
6111 loc = (Elf64_External_Rela *) htab->srelbss->contents;
6112 loc += htab->srelbss->reloc_count++;
6113 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
6114 }
6115
6116 /* Mark some specially defined symbols as absolute. */
6117 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
6118 sym->st_shndx = SHN_ABS;
6119
6120 return true;
6121 }
6122
6123 /* Used to decide how to sort relocs in an optimal manner for the
6124 dynamic linker, before writing them out. */
6125
6126 static enum elf_reloc_type_class
6127 ppc64_elf_reloc_type_class (rela)
6128 const Elf_Internal_Rela *rela;
6129 {
6130 enum elf_ppc_reloc_type r_type;
6131
6132 r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info);
6133 switch (r_type)
6134 {
6135 case R_PPC64_RELATIVE:
6136 return reloc_class_relative;
6137 case R_PPC64_JMP_SLOT:
6138 return reloc_class_plt;
6139 case R_PPC64_COPY:
6140 return reloc_class_copy;
6141 default:
6142 return reloc_class_normal;
6143 }
6144 }
6145
6146 /* Finish up the dynamic sections. */
6147
6148 static boolean
6149 ppc64_elf_finish_dynamic_sections (output_bfd, info)
6150 bfd *output_bfd;
6151 struct bfd_link_info *info;
6152 {
6153 struct ppc_link_hash_table *htab;
6154 bfd *dynobj;
6155 asection *sdyn;
6156
6157 htab = ppc_hash_table (info);
6158 dynobj = htab->elf.dynobj;
6159 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
6160
6161 if (htab->elf.dynamic_sections_created)
6162 {
6163 Elf64_External_Dyn *dyncon, *dynconend;
6164
6165 if (sdyn == NULL || htab->sgot == NULL)
6166 abort ();
6167
6168 dyncon = (Elf64_External_Dyn *) sdyn->contents;
6169 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
6170 for (; dyncon < dynconend; dyncon++)
6171 {
6172 Elf_Internal_Dyn dyn;
6173 asection *s;
6174
6175 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
6176
6177 switch (dyn.d_tag)
6178 {
6179 default:
6180 continue;
6181
6182 case DT_PPC64_GLINK:
6183 dyn.d_un.d_ptr = (htab->sglink->output_section->vma
6184 + htab->sglink->output_offset);
6185 break;
6186
6187 case DT_PPC64_OPD:
6188 s = bfd_get_section_by_name (output_bfd, ".opd");
6189 if (s != NULL)
6190 dyn.d_un.d_ptr = s->vma;
6191 break;
6192
6193 case DT_PPC64_OPDSZ:
6194 s = bfd_get_section_by_name (output_bfd, ".opd");
6195 if (s != NULL)
6196 dyn.d_un.d_val = s->_raw_size;
6197 break;
6198
6199 case DT_PLTGOT:
6200 dyn.d_un.d_ptr = (htab->splt->output_section->vma
6201 + htab->splt->output_offset);
6202 break;
6203
6204 case DT_JMPREL:
6205 dyn.d_un.d_ptr = (htab->srelplt->output_section->vma
6206 + htab->srelplt->output_offset);
6207 break;
6208
6209 case DT_PLTRELSZ:
6210 dyn.d_un.d_val = htab->srelplt->_raw_size;
6211 break;
6212
6213 case DT_RELASZ:
6214 /* Don't count procedure linkage table relocs in the
6215 overall reloc count. */
6216 if (htab->srelplt != NULL)
6217 dyn.d_un.d_val -= htab->srelplt->_raw_size;
6218 break;
6219 }
6220
6221 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
6222 }
6223 }
6224
6225 if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
6226 {
6227 /* Fill in the first entry in the global offset table.
6228 We use it to hold the link-time TOCbase. */
6229 bfd_put_64 (output_bfd,
6230 elf_gp (output_bfd) + TOC_BASE_OFF,
6231 htab->sgot->contents);
6232
6233 /* Set .got entry size. */
6234 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
6235 }
6236
6237 if (htab->splt != NULL && htab->splt->_raw_size != 0)
6238 {
6239 /* Set .plt entry size. */
6240 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
6241 = PLT_ENTRY_SIZE;
6242 }
6243
6244 return true;
6245 }
6246
6247 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
6248 #define TARGET_LITTLE_NAME "elf64-powerpcle"
6249 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
6250 #define TARGET_BIG_NAME "elf64-powerpc"
6251 #define ELF_ARCH bfd_arch_powerpc
6252 #define ELF_MACHINE_CODE EM_PPC64
6253 #define ELF_MAXPAGESIZE 0x10000
6254 #define elf_info_to_howto ppc64_elf_info_to_howto
6255
6256 #ifdef EM_CYGNUS_POWERPC
6257 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6258 #endif
6259
6260 #ifdef EM_PPC_OLD
6261 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6262 #endif
6263
6264 #define elf_backend_want_got_sym 0
6265 #define elf_backend_want_plt_sym 0
6266 #define elf_backend_plt_alignment 3
6267 #define elf_backend_plt_not_loaded 1
6268 #define elf_backend_got_symbol_offset 0
6269 #define elf_backend_got_header_size 8
6270 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
6271 #define elf_backend_can_gc_sections 1
6272 #define elf_backend_can_refcount 1
6273 #define elf_backend_rela_normal 1
6274
6275 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
6276 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
6277 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
6278 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
6279
6280 #define elf_backend_object_p ppc64_elf_object_p
6281 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
6282 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
6283 #define elf_backend_check_relocs ppc64_elf_check_relocs
6284 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
6285 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
6286 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
6287 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
6288 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
6289 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
6290 #define elf_backend_relocate_section ppc64_elf_relocate_section
6291 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
6292 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
6293 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
6294
6295 #include "elf64-target.h"
GDB Binutils - Deliverables
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