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* elf64-ppc.c (ppc64_elf_relocate_section): Do unaligned reloc
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003 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/ppc64.h"
31 #include "elf64-ppc.h"
32
33 static void ppc_howto_init
34 PARAMS ((void));
35 static reloc_howto_type *ppc64_elf_reloc_type_lookup
36 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
37 static void ppc64_elf_info_to_howto
38 PARAMS ((bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst));
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
41 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
42 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
43 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
44 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
45 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
46 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
47 static bfd_reloc_status_type ppc64_elf_toc_reloc
48 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
49 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
50 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
51 static bfd_reloc_status_type ppc64_elf_toc64_reloc
52 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
53 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
54 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
55 static bfd_boolean ppc64_elf_object_p
56 PARAMS ((bfd *));
57 static bfd_boolean ppc64_elf_merge_private_bfd_data
58 PARAMS ((bfd *, bfd *));
59 static bfd_boolean ppc64_elf_new_section_hook
60 PARAMS ((bfd *, asection *));
61
62
63 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
64 #define TARGET_LITTLE_NAME "elf64-powerpcle"
65 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
66 #define TARGET_BIG_NAME "elf64-powerpc"
67 #define ELF_ARCH bfd_arch_powerpc
68 #define ELF_MACHINE_CODE EM_PPC64
69 #define ELF_MAXPAGESIZE 0x10000
70 #define elf_info_to_howto ppc64_elf_info_to_howto
71
72 #define elf_backend_want_got_sym 0
73 #define elf_backend_want_plt_sym 0
74 #define elf_backend_plt_alignment 3
75 #define elf_backend_plt_not_loaded 1
76 #define elf_backend_got_symbol_offset 0
77 #define elf_backend_got_header_size 8
78 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
79 #define elf_backend_can_gc_sections 1
80 #define elf_backend_can_refcount 1
81 #define elf_backend_rela_normal 1
82
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88
89 #define elf_backend_object_p ppc64_elf_object_p
90 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
91 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
92 #define elf_backend_check_relocs ppc64_elf_check_relocs
93 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
94 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
95 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
96 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
97 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
98 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
99 #define elf_backend_relocate_section ppc64_elf_relocate_section
100 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
101 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
102 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
103
104 /* The name of the dynamic interpreter. This is put in the .interp
105 section. */
106 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
107
108 /* The size in bytes of an entry in the procedure linkage table. */
109 #define PLT_ENTRY_SIZE 24
110
111 /* The initial size of the plt reserved for the dynamic linker. */
112 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
113
114 /* TOC base pointers offset from start of TOC. */
115 #define TOC_BASE_OFF 0x8000
116
117 /* Offset of tp and dtp pointers from start of TLS block. */
118 #define TP_OFFSET 0x7000
119 #define DTP_OFFSET 0x8000
120
121 /* .plt call stub instructions. The normal stub is like this, but
122 sometimes the .plt entry crosses a 64k boundary and we need to
123 insert an addis to adjust r12. */
124 #define PLT_CALL_STUB_SIZE (7*4)
125 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
126 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
127 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
128 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
129 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
130 /* ld %r11,xxx+16@l(%r12) */
131 #define BCTR 0x4e800420 /* bctr */
132
133
134 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
135 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
136
137 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
138
139 /* glink call stub instructions. We enter with the index in R0, and the
140 address of glink entry in CTR. From that, we can calculate PLT0. */
141 #define GLINK_CALL_STUB_SIZE (16*4)
142 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
143 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
144 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
145 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
146 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
147 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
148 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
149 /* sub %r12,%r12,%r11 */
150 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
151 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
152 /* ld %r11,xxx@l(%r12) */
153 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
154 /* ld %r2,8(%r12) */
155 /* mtctr %r11 */
156 /* ld %r11,16(%r12) */
157 /* bctr */
158
159 /* Pad with this. */
160 #define NOP 0x60000000
161
162 /* Some other nops. */
163 #define CROR_151515 0x4def7b82
164 #define CROR_313131 0x4ffffb82
165
166 /* .glink entries for the first 32k functions are two instructions. */
167 #define LI_R0_0 0x38000000 /* li %r0,0 */
168 #define B_DOT 0x48000000 /* b . */
169
170 /* After that, we need two instructions to load the index, followed by
171 a branch. */
172 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
173 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
174
175 /* Instructions to save and restore floating point regs. */
176 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
177 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
178 #define BLR 0x4e800020 /* blr */
179
180 /* Since .opd is an array of descriptors and each entry will end up
181 with identical R_PPC64_RELATIVE relocs, there is really no need to
182 propagate .opd relocs; The dynamic linker should be taught to
183 relocate .opd without reloc entries. */
184 #ifndef NO_OPD_RELOCS
185 #define NO_OPD_RELOCS 0
186 #endif
187 \f
188 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
189
190 /* Relocation HOWTO's. */
191 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
192
193 static reloc_howto_type ppc64_elf_howto_raw[] = {
194 /* This reloc does nothing. */
195 HOWTO (R_PPC64_NONE, /* type */
196 0, /* rightshift */
197 2, /* size (0 = byte, 1 = short, 2 = long) */
198 32, /* bitsize */
199 FALSE, /* pc_relative */
200 0, /* bitpos */
201 complain_overflow_dont, /* complain_on_overflow */
202 bfd_elf_generic_reloc, /* special_function */
203 "R_PPC64_NONE", /* name */
204 FALSE, /* partial_inplace */
205 0, /* src_mask */
206 0, /* dst_mask */
207 FALSE), /* pcrel_offset */
208
209 /* A standard 32 bit relocation. */
210 HOWTO (R_PPC64_ADDR32, /* type */
211 0, /* rightshift */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
213 32, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_bitfield, /* complain_on_overflow */
217 bfd_elf_generic_reloc, /* special_function */
218 "R_PPC64_ADDR32", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0xffffffff, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 /* An absolute 26 bit branch; the lower two bits must be zero.
225 FIXME: we don't check that, we just clear them. */
226 HOWTO (R_PPC64_ADDR24, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 26, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_bitfield, /* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_PPC64_ADDR24", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0x03fffffc, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* A standard 16 bit relocation. */
241 HOWTO (R_PPC64_ADDR16, /* type */
242 0, /* rightshift */
243 1, /* 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_ADDR16", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0xffff, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* A 16 bit relocation without overflow. */
256 HOWTO (R_PPC64_ADDR16_LO, /* type */
257 0, /* rightshift */
258 1, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 0, /* bitpos */
262 complain_overflow_dont,/* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_PPC64_ADDR16_LO", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0xffff, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* Bits 16-31 of an address. */
271 HOWTO (R_PPC64_ADDR16_HI, /* type */
272 16, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC64_ADDR16_HI", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xffff, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
286 bits, treated as a signed number, is negative. */
287 HOWTO (R_PPC64_ADDR16_HA, /* type */
288 16, /* rightshift */
289 1, /* size (0 = byte, 1 = short, 2 = long) */
290 16, /* bitsize */
291 FALSE, /* pc_relative */
292 0, /* bitpos */
293 complain_overflow_dont, /* complain_on_overflow */
294 ppc64_elf_ha_reloc, /* special_function */
295 "R_PPC64_ADDR16_HA", /* name */
296 FALSE, /* partial_inplace */
297 0, /* src_mask */
298 0xffff, /* dst_mask */
299 FALSE), /* pcrel_offset */
300
301 /* An absolute 16 bit branch; the lower two bits must be zero.
302 FIXME: we don't check that, we just clear them. */
303 HOWTO (R_PPC64_ADDR14, /* type */
304 0, /* rightshift */
305 2, /* size (0 = byte, 1 = short, 2 = long) */
306 16, /* bitsize */
307 FALSE, /* pc_relative */
308 0, /* bitpos */
309 complain_overflow_bitfield, /* complain_on_overflow */
310 bfd_elf_generic_reloc, /* special_function */
311 "R_PPC64_ADDR14", /* name */
312 FALSE, /* partial_inplace */
313 0, /* src_mask */
314 0x0000fffc, /* dst_mask */
315 FALSE), /* pcrel_offset */
316
317 /* An absolute 16 bit branch, for which bit 10 should be set to
318 indicate that the branch is expected to be taken. The lower two
319 bits must be zero. */
320 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 ppc64_elf_brtaken_reloc, /* special_function */
328 "R_PPC64_ADDR14_BRTAKEN",/* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x0000fffc, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* An absolute 16 bit branch, for which bit 10 should be set to
335 indicate that the branch is not expected to be taken. The lower
336 two bits must be zero. */
337 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_bitfield, /* complain_on_overflow */
344 ppc64_elf_brtaken_reloc, /* special_function */
345 "R_PPC64_ADDR14_BRNTAKEN",/* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0x0000fffc, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 /* A relative 26 bit branch; the lower two bits must be zero. */
352 HOWTO (R_PPC64_REL24, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 26, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC64_REL24", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0x03fffffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch; the lower two bits must be zero. */
367 HOWTO (R_PPC64_REL14, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 16, /* bitsize */
371 TRUE, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_signed, /* complain_on_overflow */
374 bfd_elf_generic_reloc, /* special_function */
375 "R_PPC64_REL14", /* name */
376 FALSE, /* partial_inplace */
377 0, /* src_mask */
378 0x0000fffc, /* dst_mask */
379 TRUE), /* pcrel_offset */
380
381 /* A relative 16 bit branch. Bit 10 should be set to indicate that
382 the branch is expected to be taken. The lower two bits must be
383 zero. */
384 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 16, /* bitsize */
388 TRUE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_signed, /* complain_on_overflow */
391 ppc64_elf_brtaken_reloc, /* special_function */
392 "R_PPC64_REL14_BRTAKEN", /* name */
393 FALSE, /* partial_inplace */
394 0, /* src_mask */
395 0x0000fffc, /* dst_mask */
396 TRUE), /* pcrel_offset */
397
398 /* A relative 16 bit branch. Bit 10 should be set to indicate that
399 the branch is not expected to be taken. The lower two bits must
400 be zero. */
401 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 TRUE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_signed, /* complain_on_overflow */
408 ppc64_elf_brtaken_reloc, /* special_function */
409 "R_PPC64_REL14_BRNTAKEN",/* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0x0000fffc, /* dst_mask */
413 TRUE), /* pcrel_offset */
414
415 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
416 symbol. */
417 HOWTO (R_PPC64_GOT16, /* type */
418 0, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_signed, /* complain_on_overflow */
424 ppc64_elf_unhandled_reloc, /* special_function */
425 "R_PPC64_GOT16", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC64_GOT16_LO, /* type */
434 0, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_dont, /* complain_on_overflow */
440 ppc64_elf_unhandled_reloc, /* special_function */
441 "R_PPC64_GOT16_LO", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
448 the symbol. */
449 HOWTO (R_PPC64_GOT16_HI, /* type */
450 16, /* rightshift */
451 1, /* size (0 = byte, 1 = short, 2 = long) */
452 16, /* bitsize */
453 FALSE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_dont,/* complain_on_overflow */
456 ppc64_elf_unhandled_reloc, /* special_function */
457 "R_PPC64_GOT16_HI", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0xffff, /* dst_mask */
461 FALSE), /* pcrel_offset */
462
463 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
464 the symbol. */
465 HOWTO (R_PPC64_GOT16_HA, /* type */
466 16, /* rightshift */
467 1, /* size (0 = byte, 1 = short, 2 = long) */
468 16, /* bitsize */
469 FALSE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_dont,/* complain_on_overflow */
472 ppc64_elf_unhandled_reloc, /* special_function */
473 "R_PPC64_GOT16_HA", /* name */
474 FALSE, /* partial_inplace */
475 0, /* src_mask */
476 0xffff, /* dst_mask */
477 FALSE), /* pcrel_offset */
478
479 /* This is used only by the dynamic linker. The symbol should exist
480 both in the object being run and in some shared library. The
481 dynamic linker copies the data addressed by the symbol from the
482 shared library into the object, because the object being
483 run has to have the data at some particular address. */
484 HOWTO (R_PPC64_COPY, /* type */
485 0, /* rightshift */
486 0, /* this one is variable size */
487 0, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_dont, /* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_COPY", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Like R_PPC64_ADDR64, but used when setting global offset table
499 entries. */
500 HOWTO (R_PPC64_GLOB_DAT, /* type */
501 0, /* rightshift */
502 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
503 64, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_dont, /* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GLOB_DAT", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 ONES (64), /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Created by the link editor. Marks a procedure linkage table
515 entry for a symbol. */
516 HOWTO (R_PPC64_JMP_SLOT, /* type */
517 0, /* rightshift */
518 0, /* size (0 = byte, 1 = short, 2 = long) */
519 0, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_dont, /* complain_on_overflow */
523 ppc64_elf_unhandled_reloc, /* special_function */
524 "R_PPC64_JMP_SLOT", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Used only by the dynamic linker. When the object is run, this
531 doubleword64 is set to the load address of the object, plus the
532 addend. */
533 HOWTO (R_PPC64_RELATIVE, /* type */
534 0, /* rightshift */
535 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
536 64, /* bitsize */
537 FALSE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_dont, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC64_RELATIVE", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 ONES (64), /* dst_mask */
545 FALSE), /* pcrel_offset */
546
547 /* Like R_PPC64_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC64_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC64_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC64_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC64_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC64_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative. */
578 HOWTO (R_PPC64_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 /* FIXME: Verify. Was complain_overflow_bitfield. */
585 complain_overflow_signed, /* complain_on_overflow */
586 bfd_elf_generic_reloc, /* special_function */
587 "R_PPC64_REL32", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 0xffffffff, /* dst_mask */
591 TRUE), /* pcrel_offset */
592
593 /* 32-bit relocation to the symbol's procedure linkage table. */
594 HOWTO (R_PPC64_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 ppc64_elf_unhandled_reloc, /* special_function */
602 "R_PPC64_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0xffffffff, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: R_PPC64_PLTREL32 not supported. */
610 HOWTO (R_PPC64_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_signed, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC64_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC64_PLT16_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_unhandled_reloc, /* special_function */
634 "R_PPC64_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC64_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_dont, /* complain_on_overflow */
649 ppc64_elf_unhandled_reloc, /* special_function */
650 "R_PPC64_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC64_PLT16_HA, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_dont, /* complain_on_overflow */
665 ppc64_elf_unhandled_reloc, /* special_function */
666 "R_PPC64_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* 16-bit section relative relocation. */
673 HOWTO (R_PPC64_SECTOFF, /* type */
674 0, /* rightshift */
675 1, /* size (0 = byte, 1 = short, 2 = long) */
676 16, /* bitsize */
677 FALSE, /* pc_relative */
678 0, /* bitpos */
679 complain_overflow_bitfield, /* complain_on_overflow */
680 ppc64_elf_sectoff_reloc, /* special_function */
681 "R_PPC64_SECTOFF", /* name */
682 FALSE, /* partial_inplace */
683 0, /* src_mask */
684 0xffff, /* dst_mask */
685 FALSE), /* pcrel_offset */
686
687 /* Like R_PPC64_SECTOFF, but no overflow warning. */
688 HOWTO (R_PPC64_SECTOFF_LO, /* type */
689 0, /* rightshift */
690 1, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 FALSE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_dont, /* complain_on_overflow */
695 ppc64_elf_sectoff_reloc, /* special_function */
696 "R_PPC64_SECTOFF_LO", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffff, /* dst_mask */
700 FALSE), /* pcrel_offset */
701
702 /* 16-bit upper half section relative relocation. */
703 HOWTO (R_PPC64_SECTOFF_HI, /* type */
704 16, /* rightshift */
705 1, /* size (0 = byte, 1 = short, 2 = long) */
706 16, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_dont, /* complain_on_overflow */
710 ppc64_elf_sectoff_reloc, /* special_function */
711 "R_PPC64_SECTOFF_HI", /* name */
712 FALSE, /* partial_inplace */
713 0, /* src_mask */
714 0xffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 /* 16-bit upper half adjusted section relative relocation. */
718 HOWTO (R_PPC64_SECTOFF_HA, /* type */
719 16, /* rightshift */
720 1, /* size (0 = byte, 1 = short, 2 = long) */
721 16, /* bitsize */
722 FALSE, /* pc_relative */
723 0, /* bitpos */
724 complain_overflow_dont, /* complain_on_overflow */
725 ppc64_elf_sectoff_ha_reloc, /* special_function */
726 "R_PPC64_SECTOFF_HA", /* name */
727 FALSE, /* partial_inplace */
728 0, /* src_mask */
729 0xffff, /* dst_mask */
730 FALSE), /* pcrel_offset */
731
732 /* Like R_PPC64_REL24 without touching the two least significant bits. */
733 HOWTO (R_PPC64_REL30, /* type */
734 2, /* rightshift */
735 2, /* size (0 = byte, 1 = short, 2 = long) */
736 30, /* bitsize */
737 TRUE, /* pc_relative */
738 0, /* bitpos */
739 complain_overflow_dont, /* complain_on_overflow */
740 bfd_elf_generic_reloc, /* special_function */
741 "R_PPC64_REL30", /* name */
742 FALSE, /* partial_inplace */
743 0, /* src_mask */
744 0xfffffffc, /* dst_mask */
745 TRUE), /* pcrel_offset */
746
747 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
748
749 /* A standard 64-bit relocation. */
750 HOWTO (R_PPC64_ADDR64, /* type */
751 0, /* rightshift */
752 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
753 64, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_dont, /* complain_on_overflow */
757 bfd_elf_generic_reloc, /* special_function */
758 "R_PPC64_ADDR64", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 ONES (64), /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 /* The bits 32-47 of an address. */
765 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
766 32, /* rightshift */
767 1, /* size (0 = byte, 1 = short, 2 = long) */
768 16, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 bfd_elf_generic_reloc, /* special_function */
773 "R_PPC64_ADDR16_HIGHER", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* The bits 32-47 of an address, plus 1 if the contents of the low
780 16 bits, treated as a signed number, is negative. */
781 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
782 32, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_dont, /* complain_on_overflow */
788 ppc64_elf_ha_reloc, /* special_function */
789 "R_PPC64_ADDR16_HIGHERA", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* The bits 48-63 of an address. */
796 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
797 48, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_dont, /* complain_on_overflow */
803 bfd_elf_generic_reloc, /* special_function */
804 "R_PPC64_ADDR16_HIGHEST", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* The bits 48-63 of an address, plus 1 if the contents of the low
811 16 bits, treated as a signed number, is negative. */
812 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
813 48, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc64_elf_ha_reloc, /* special_function */
820 "R_PPC64_ADDR16_HIGHESTA", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like ADDR64, but may be unaligned. */
827 HOWTO (R_PPC64_UADDR64, /* type */
828 0, /* rightshift */
829 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
830 64, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 bfd_elf_generic_reloc, /* special_function */
835 "R_PPC64_UADDR64", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 ONES (64), /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* 64-bit relative relocation. */
842 HOWTO (R_PPC64_REL64, /* type */
843 0, /* rightshift */
844 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
845 64, /* bitsize */
846 TRUE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 bfd_elf_generic_reloc, /* special_function */
850 "R_PPC64_REL64", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 ONES (64), /* dst_mask */
854 TRUE), /* pcrel_offset */
855
856 /* 64-bit relocation to the symbol's procedure linkage table. */
857 HOWTO (R_PPC64_PLT64, /* type */
858 0, /* rightshift */
859 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
860 64, /* bitsize */
861 FALSE, /* pc_relative */
862 0, /* bitpos */
863 complain_overflow_dont, /* complain_on_overflow */
864 ppc64_elf_unhandled_reloc, /* special_function */
865 "R_PPC64_PLT64", /* name */
866 FALSE, /* partial_inplace */
867 0, /* src_mask */
868 ONES (64), /* dst_mask */
869 FALSE), /* pcrel_offset */
870
871 /* 64-bit PC relative relocation to the symbol's procedure linkage
872 table. */
873 /* FIXME: R_PPC64_PLTREL64 not supported. */
874 HOWTO (R_PPC64_PLTREL64, /* type */
875 0, /* rightshift */
876 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
877 64, /* bitsize */
878 TRUE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 ppc64_elf_unhandled_reloc, /* special_function */
882 "R_PPC64_PLTREL64", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 ONES (64), /* dst_mask */
886 TRUE), /* pcrel_offset */
887
888 /* 16 bit TOC-relative relocation. */
889
890 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
891 HOWTO (R_PPC64_TOC16, /* type */
892 0, /* rightshift */
893 1, /* size (0 = byte, 1 = short, 2 = long) */
894 16, /* bitsize */
895 FALSE, /* pc_relative */
896 0, /* bitpos */
897 complain_overflow_signed, /* complain_on_overflow */
898 ppc64_elf_toc_reloc, /* special_function */
899 "R_PPC64_TOC16", /* name */
900 FALSE, /* partial_inplace */
901 0, /* src_mask */
902 0xffff, /* dst_mask */
903 FALSE), /* pcrel_offset */
904
905 /* 16 bit TOC-relative relocation without overflow. */
906
907 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
908 HOWTO (R_PPC64_TOC16_LO, /* type */
909 0, /* rightshift */
910 1, /* size (0 = byte, 1 = short, 2 = long) */
911 16, /* bitsize */
912 FALSE, /* pc_relative */
913 0, /* bitpos */
914 complain_overflow_dont, /* complain_on_overflow */
915 ppc64_elf_toc_reloc, /* special_function */
916 "R_PPC64_TOC16_LO", /* name */
917 FALSE, /* partial_inplace */
918 0, /* src_mask */
919 0xffff, /* dst_mask */
920 FALSE), /* pcrel_offset */
921
922 /* 16 bit TOC-relative relocation, high 16 bits. */
923
924 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
925 HOWTO (R_PPC64_TOC16_HI, /* type */
926 16, /* rightshift */
927 1, /* size (0 = byte, 1 = short, 2 = long) */
928 16, /* bitsize */
929 FALSE, /* pc_relative */
930 0, /* bitpos */
931 complain_overflow_dont, /* complain_on_overflow */
932 ppc64_elf_toc_reloc, /* special_function */
933 "R_PPC64_TOC16_HI", /* name */
934 FALSE, /* partial_inplace */
935 0, /* src_mask */
936 0xffff, /* dst_mask */
937 FALSE), /* pcrel_offset */
938
939 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
940 contents of the low 16 bits, treated as a signed number, is
941 negative. */
942
943 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
944 HOWTO (R_PPC64_TOC16_HA, /* type */
945 16, /* rightshift */
946 1, /* size (0 = byte, 1 = short, 2 = long) */
947 16, /* bitsize */
948 FALSE, /* pc_relative */
949 0, /* bitpos */
950 complain_overflow_dont, /* complain_on_overflow */
951 ppc64_elf_toc_ha_reloc, /* special_function */
952 "R_PPC64_TOC16_HA", /* name */
953 FALSE, /* partial_inplace */
954 0, /* src_mask */
955 0xffff, /* dst_mask */
956 FALSE), /* pcrel_offset */
957
958 /* 64-bit relocation; insert value of TOC base (.TOC.). */
959
960 /* R_PPC64_TOC 51 doubleword64 .TOC. */
961 HOWTO (R_PPC64_TOC, /* type */
962 0, /* rightshift */
963 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
964 64, /* bitsize */
965 FALSE, /* pc_relative */
966 0, /* bitpos */
967 complain_overflow_bitfield, /* complain_on_overflow */
968 ppc64_elf_toc64_reloc, /* special_function */
969 "R_PPC64_TOC", /* name */
970 FALSE, /* partial_inplace */
971 0, /* src_mask */
972 ONES (64), /* dst_mask */
973 FALSE), /* pcrel_offset */
974
975 /* Like R_PPC64_GOT16, but also informs the link editor that the
976 value to relocate may (!) refer to a PLT entry which the link
977 editor (a) may replace with the symbol value. If the link editor
978 is unable to fully resolve the symbol, it may (b) create a PLT
979 entry and store the address to the new PLT entry in the GOT.
980 This permits lazy resolution of function symbols at run time.
981 The link editor may also skip all of this and just (c) emit a
982 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
983 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
984 HOWTO (R_PPC64_PLTGOT16, /* type */
985 0, /* rightshift */
986 1, /* size (0 = byte, 1 = short, 2 = long) */
987 16, /* bitsize */
988 FALSE, /* pc_relative */
989 0, /* bitpos */
990 complain_overflow_signed, /* complain_on_overflow */
991 ppc64_elf_unhandled_reloc, /* special_function */
992 "R_PPC64_PLTGOT16", /* name */
993 FALSE, /* partial_inplace */
994 0, /* src_mask */
995 0xffff, /* dst_mask */
996 FALSE), /* pcrel_offset */
997
998 /* Like R_PPC64_PLTGOT16, but without overflow. */
999 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1000 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1001 0, /* rightshift */
1002 1, /* size (0 = byte, 1 = short, 2 = long) */
1003 16, /* bitsize */
1004 FALSE, /* pc_relative */
1005 0, /* bitpos */
1006 complain_overflow_dont, /* complain_on_overflow */
1007 ppc64_elf_unhandled_reloc, /* special_function */
1008 "R_PPC64_PLTGOT16_LO", /* name */
1009 FALSE, /* partial_inplace */
1010 0, /* src_mask */
1011 0xffff, /* dst_mask */
1012 FALSE), /* pcrel_offset */
1013
1014 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1015 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1016 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1017 16, /* rightshift */
1018 1, /* size (0 = byte, 1 = short, 2 = long) */
1019 16, /* bitsize */
1020 FALSE, /* pc_relative */
1021 0, /* bitpos */
1022 complain_overflow_dont, /* complain_on_overflow */
1023 ppc64_elf_unhandled_reloc, /* special_function */
1024 "R_PPC64_PLTGOT16_HI", /* name */
1025 FALSE, /* partial_inplace */
1026 0, /* src_mask */
1027 0xffff, /* dst_mask */
1028 FALSE), /* pcrel_offset */
1029
1030 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1031 1 if the contents of the low 16 bits, treated as a signed number,
1032 is negative. */
1033 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1034 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1035 16, /* rightshift */
1036 1, /* size (0 = byte, 1 = short, 2 = long) */
1037 16, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_dont,/* complain_on_overflow */
1041 ppc64_elf_unhandled_reloc, /* special_function */
1042 "R_PPC64_PLTGOT16_HA", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 0xffff, /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1049 HOWTO (R_PPC64_ADDR16_DS, /* type */
1050 0, /* rightshift */
1051 1, /* size (0 = byte, 1 = short, 2 = long) */
1052 16, /* bitsize */
1053 FALSE, /* pc_relative */
1054 0, /* bitpos */
1055 complain_overflow_bitfield, /* complain_on_overflow */
1056 bfd_elf_generic_reloc, /* special_function */
1057 "R_PPC64_ADDR16_DS", /* name */
1058 FALSE, /* partial_inplace */
1059 0, /* src_mask */
1060 0xfffc, /* dst_mask */
1061 FALSE), /* pcrel_offset */
1062
1063 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1064 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1065 0, /* rightshift */
1066 1, /* size (0 = byte, 1 = short, 2 = long) */
1067 16, /* bitsize */
1068 FALSE, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_dont,/* complain_on_overflow */
1071 bfd_elf_generic_reloc, /* special_function */
1072 "R_PPC64_ADDR16_LO_DS",/* name */
1073 FALSE, /* partial_inplace */
1074 0, /* src_mask */
1075 0xfffc, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1077
1078 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1079 HOWTO (R_PPC64_GOT16_DS, /* type */
1080 0, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 FALSE, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_signed, /* complain_on_overflow */
1086 ppc64_elf_unhandled_reloc, /* special_function */
1087 "R_PPC64_GOT16_DS", /* name */
1088 FALSE, /* partial_inplace */
1089 0, /* src_mask */
1090 0xfffc, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1092
1093 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1094 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1095 0, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_dont, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_GOT16_LO_DS", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xfffc, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1109 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1110 0, /* rightshift */
1111 1, /* size (0 = byte, 1 = short, 2 = long) */
1112 16, /* bitsize */
1113 FALSE, /* pc_relative */
1114 0, /* bitpos */
1115 complain_overflow_dont, /* complain_on_overflow */
1116 ppc64_elf_unhandled_reloc, /* special_function */
1117 "R_PPC64_PLT16_LO_DS", /* name */
1118 FALSE, /* partial_inplace */
1119 0, /* src_mask */
1120 0xfffc, /* dst_mask */
1121 FALSE), /* pcrel_offset */
1122
1123 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1124 HOWTO (R_PPC64_SECTOFF_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_bitfield, /* complain_on_overflow */
1131 ppc64_elf_sectoff_reloc, /* special_function */
1132 "R_PPC64_SECTOFF_DS", /* name */
1133 FALSE, /* partial_inplace */
1134 0, /* src_mask */
1135 0xfffc, /* dst_mask */
1136 FALSE), /* pcrel_offset */
1137
1138 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1139 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1140 0, /* rightshift */
1141 1, /* size (0 = byte, 1 = short, 2 = long) */
1142 16, /* bitsize */
1143 FALSE, /* pc_relative */
1144 0, /* bitpos */
1145 complain_overflow_dont, /* complain_on_overflow */
1146 ppc64_elf_sectoff_reloc, /* special_function */
1147 "R_PPC64_SECTOFF_LO_DS",/* name */
1148 FALSE, /* partial_inplace */
1149 0, /* src_mask */
1150 0xfffc, /* dst_mask */
1151 FALSE), /* pcrel_offset */
1152
1153 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1154 HOWTO (R_PPC64_TOC16_DS, /* type */
1155 0, /* rightshift */
1156 1, /* size (0 = byte, 1 = short, 2 = long) */
1157 16, /* bitsize */
1158 FALSE, /* pc_relative */
1159 0, /* bitpos */
1160 complain_overflow_signed, /* complain_on_overflow */
1161 ppc64_elf_toc_reloc, /* special_function */
1162 "R_PPC64_TOC16_DS", /* name */
1163 FALSE, /* partial_inplace */
1164 0, /* src_mask */
1165 0xfffc, /* dst_mask */
1166 FALSE), /* pcrel_offset */
1167
1168 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1169 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1170 0, /* rightshift */
1171 1, /* size (0 = byte, 1 = short, 2 = long) */
1172 16, /* bitsize */
1173 FALSE, /* pc_relative */
1174 0, /* bitpos */
1175 complain_overflow_dont, /* complain_on_overflow */
1176 ppc64_elf_toc_reloc, /* special_function */
1177 "R_PPC64_TOC16_LO_DS", /* name */
1178 FALSE, /* partial_inplace */
1179 0, /* src_mask */
1180 0xfffc, /* dst_mask */
1181 FALSE), /* pcrel_offset */
1182
1183 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1184 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1185 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1186 0, /* rightshift */
1187 1, /* size (0 = byte, 1 = short, 2 = long) */
1188 16, /* bitsize */
1189 FALSE, /* pc_relative */
1190 0, /* bitpos */
1191 complain_overflow_signed, /* complain_on_overflow */
1192 ppc64_elf_unhandled_reloc, /* special_function */
1193 "R_PPC64_PLTGOT16_DS", /* name */
1194 FALSE, /* partial_inplace */
1195 0, /* src_mask */
1196 0xfffc, /* dst_mask */
1197 FALSE), /* pcrel_offset */
1198
1199 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1200 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1201 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1202 0, /* rightshift */
1203 1, /* size (0 = byte, 1 = short, 2 = long) */
1204 16, /* bitsize */
1205 FALSE, /* pc_relative */
1206 0, /* bitpos */
1207 complain_overflow_dont, /* complain_on_overflow */
1208 ppc64_elf_unhandled_reloc, /* special_function */
1209 "R_PPC64_PLTGOT16_LO_DS",/* name */
1210 FALSE, /* partial_inplace */
1211 0, /* src_mask */
1212 0xfffc, /* dst_mask */
1213 FALSE), /* pcrel_offset */
1214
1215 /* Marker reloc for TLS. */
1216 HOWTO (R_PPC64_TLS,
1217 0, /* rightshift */
1218 2, /* size (0 = byte, 1 = short, 2 = long) */
1219 32, /* bitsize */
1220 FALSE, /* pc_relative */
1221 0, /* bitpos */
1222 complain_overflow_dont, /* complain_on_overflow */
1223 bfd_elf_generic_reloc, /* special_function */
1224 "R_PPC64_TLS", /* name */
1225 FALSE, /* partial_inplace */
1226 0, /* src_mask */
1227 0, /* dst_mask */
1228 FALSE), /* pcrel_offset */
1229
1230 /* Computes the load module index of the load module that contains the
1231 definition of its TLS sym. */
1232 HOWTO (R_PPC64_DTPMOD64,
1233 0, /* rightshift */
1234 4, /* size (0 = byte, 1 = short, 2 = long) */
1235 64, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_dont, /* complain_on_overflow */
1239 ppc64_elf_unhandled_reloc, /* special_function */
1240 "R_PPC64_DTPMOD64", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 ONES (64), /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Computes a dtv-relative displacement, the difference between the value
1247 of sym+add and the base address of the thread-local storage block that
1248 contains the definition of sym, minus 0x8000. */
1249 HOWTO (R_PPC64_DTPREL64,
1250 0, /* rightshift */
1251 4, /* size (0 = byte, 1 = short, 2 = long) */
1252 64, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_dont, /* complain_on_overflow */
1256 ppc64_elf_unhandled_reloc, /* special_function */
1257 "R_PPC64_DTPREL64", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 ONES (64), /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 /* A 16 bit dtprel reloc. */
1264 HOWTO (R_PPC64_DTPREL16,
1265 0, /* rightshift */
1266 1, /* size (0 = byte, 1 = short, 2 = long) */
1267 16, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_signed, /* complain_on_overflow */
1271 ppc64_elf_unhandled_reloc, /* special_function */
1272 "R_PPC64_DTPREL16", /* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 0xffff, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 /* Like DTPREL16, but no overflow. */
1279 HOWTO (R_PPC64_DTPREL16_LO,
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_DTPREL16_LO", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1294 HOWTO (R_PPC64_DTPREL16_HI,
1295 16, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 ppc64_elf_unhandled_reloc, /* special_function */
1302 "R_PPC64_DTPREL16_HI", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1309 HOWTO (R_PPC64_DTPREL16_HA,
1310 16, /* rightshift */
1311 1, /* size (0 = byte, 1 = short, 2 = long) */
1312 16, /* bitsize */
1313 FALSE, /* pc_relative */
1314 0, /* bitpos */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 ppc64_elf_unhandled_reloc, /* special_function */
1317 "R_PPC64_DTPREL16_HA", /* name */
1318 FALSE, /* partial_inplace */
1319 0, /* src_mask */
1320 0xffff, /* dst_mask */
1321 FALSE), /* pcrel_offset */
1322
1323 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1324 HOWTO (R_PPC64_DTPREL16_HIGHER,
1325 32, /* rightshift */
1326 1, /* size (0 = byte, 1 = short, 2 = long) */
1327 16, /* bitsize */
1328 FALSE, /* pc_relative */
1329 0, /* bitpos */
1330 complain_overflow_dont, /* complain_on_overflow */
1331 ppc64_elf_unhandled_reloc, /* special_function */
1332 "R_PPC64_DTPREL16_HIGHER", /* name */
1333 FALSE, /* partial_inplace */
1334 0, /* src_mask */
1335 0xffff, /* dst_mask */
1336 FALSE), /* pcrel_offset */
1337
1338 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1339 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1340 32, /* rightshift */
1341 1, /* size (0 = byte, 1 = short, 2 = long) */
1342 16, /* bitsize */
1343 FALSE, /* pc_relative */
1344 0, /* bitpos */
1345 complain_overflow_dont, /* complain_on_overflow */
1346 ppc64_elf_unhandled_reloc, /* special_function */
1347 "R_PPC64_DTPREL16_HIGHERA", /* name */
1348 FALSE, /* partial_inplace */
1349 0, /* src_mask */
1350 0xffff, /* dst_mask */
1351 FALSE), /* pcrel_offset */
1352
1353 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1354 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1355 48, /* rightshift */
1356 1, /* size (0 = byte, 1 = short, 2 = long) */
1357 16, /* bitsize */
1358 FALSE, /* pc_relative */
1359 0, /* bitpos */
1360 complain_overflow_dont, /* complain_on_overflow */
1361 ppc64_elf_unhandled_reloc, /* special_function */
1362 "R_PPC64_DTPREL16_HIGHEST", /* name */
1363 FALSE, /* partial_inplace */
1364 0, /* src_mask */
1365 0xffff, /* dst_mask */
1366 FALSE), /* pcrel_offset */
1367
1368 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1369 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1370 48, /* rightshift */
1371 1, /* size (0 = byte, 1 = short, 2 = long) */
1372 16, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 0xffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* Like DTPREL16, but for insns with a DS field. */
1384 HOWTO (R_PPC64_DTPREL16_DS,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16_DS", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xfffc, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16_DS, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO_DS,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO_DS", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xfffc, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Computes a tp-relative displacement, the difference between the value of
1414 sym+add and the value of the thread pointer (r13). */
1415 HOWTO (R_PPC64_TPREL64,
1416 0, /* rightshift */
1417 4, /* size (0 = byte, 1 = short, 2 = long) */
1418 64, /* bitsize */
1419 FALSE, /* pc_relative */
1420 0, /* bitpos */
1421 complain_overflow_dont, /* complain_on_overflow */
1422 ppc64_elf_unhandled_reloc, /* special_function */
1423 "R_PPC64_TPREL64", /* name */
1424 FALSE, /* partial_inplace */
1425 0, /* src_mask */
1426 ONES (64), /* dst_mask */
1427 FALSE), /* pcrel_offset */
1428
1429 /* A 16 bit tprel reloc. */
1430 HOWTO (R_PPC64_TPREL16,
1431 0, /* rightshift */
1432 1, /* size (0 = byte, 1 = short, 2 = long) */
1433 16, /* bitsize */
1434 FALSE, /* pc_relative */
1435 0, /* bitpos */
1436 complain_overflow_signed, /* complain_on_overflow */
1437 ppc64_elf_unhandled_reloc, /* special_function */
1438 "R_PPC64_TPREL16", /* name */
1439 FALSE, /* partial_inplace */
1440 0, /* src_mask */
1441 0xffff, /* dst_mask */
1442 FALSE), /* pcrel_offset */
1443
1444 /* Like TPREL16, but no overflow. */
1445 HOWTO (R_PPC64_TPREL16_LO,
1446 0, /* rightshift */
1447 1, /* size (0 = byte, 1 = short, 2 = long) */
1448 16, /* bitsize */
1449 FALSE, /* pc_relative */
1450 0, /* bitpos */
1451 complain_overflow_dont, /* complain_on_overflow */
1452 ppc64_elf_unhandled_reloc, /* special_function */
1453 "R_PPC64_TPREL16_LO", /* name */
1454 FALSE, /* partial_inplace */
1455 0, /* src_mask */
1456 0xffff, /* dst_mask */
1457 FALSE), /* pcrel_offset */
1458
1459 /* Like TPREL16_LO, but next higher group of 16 bits. */
1460 HOWTO (R_PPC64_TPREL16_HI,
1461 16, /* rightshift */
1462 1, /* size (0 = byte, 1 = short, 2 = long) */
1463 16, /* bitsize */
1464 FALSE, /* pc_relative */
1465 0, /* bitpos */
1466 complain_overflow_dont, /* complain_on_overflow */
1467 ppc64_elf_unhandled_reloc, /* special_function */
1468 "R_PPC64_TPREL16_HI", /* name */
1469 FALSE, /* partial_inplace */
1470 0, /* src_mask */
1471 0xffff, /* dst_mask */
1472 FALSE), /* pcrel_offset */
1473
1474 /* Like TPREL16_HI, but adjust for low 16 bits. */
1475 HOWTO (R_PPC64_TPREL16_HA,
1476 16, /* rightshift */
1477 1, /* size (0 = byte, 1 = short, 2 = long) */
1478 16, /* bitsize */
1479 FALSE, /* pc_relative */
1480 0, /* bitpos */
1481 complain_overflow_dont, /* complain_on_overflow */
1482 ppc64_elf_unhandled_reloc, /* special_function */
1483 "R_PPC64_TPREL16_HA", /* name */
1484 FALSE, /* partial_inplace */
1485 0, /* src_mask */
1486 0xffff, /* dst_mask */
1487 FALSE), /* pcrel_offset */
1488
1489 /* Like TPREL16_HI, but next higher group of 16 bits. */
1490 HOWTO (R_PPC64_TPREL16_HIGHER,
1491 32, /* rightshift */
1492 1, /* size (0 = byte, 1 = short, 2 = long) */
1493 16, /* bitsize */
1494 FALSE, /* pc_relative */
1495 0, /* bitpos */
1496 complain_overflow_dont, /* complain_on_overflow */
1497 ppc64_elf_unhandled_reloc, /* special_function */
1498 "R_PPC64_TPREL16_HIGHER", /* name */
1499 FALSE, /* partial_inplace */
1500 0, /* src_mask */
1501 0xffff, /* dst_mask */
1502 FALSE), /* pcrel_offset */
1503
1504 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1505 HOWTO (R_PPC64_TPREL16_HIGHERA,
1506 32, /* rightshift */
1507 1, /* size (0 = byte, 1 = short, 2 = long) */
1508 16, /* bitsize */
1509 FALSE, /* pc_relative */
1510 0, /* bitpos */
1511 complain_overflow_dont, /* complain_on_overflow */
1512 ppc64_elf_unhandled_reloc, /* special_function */
1513 "R_PPC64_TPREL16_HIGHERA", /* name */
1514 FALSE, /* partial_inplace */
1515 0, /* src_mask */
1516 0xffff, /* dst_mask */
1517 FALSE), /* pcrel_offset */
1518
1519 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1520 HOWTO (R_PPC64_TPREL16_HIGHEST,
1521 48, /* rightshift */
1522 1, /* size (0 = byte, 1 = short, 2 = long) */
1523 16, /* bitsize */
1524 FALSE, /* pc_relative */
1525 0, /* bitpos */
1526 complain_overflow_dont, /* complain_on_overflow */
1527 ppc64_elf_unhandled_reloc, /* special_function */
1528 "R_PPC64_TPREL16_HIGHEST", /* name */
1529 FALSE, /* partial_inplace */
1530 0, /* src_mask */
1531 0xffff, /* dst_mask */
1532 FALSE), /* pcrel_offset */
1533
1534 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1535 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1536 48, /* rightshift */
1537 1, /* size (0 = byte, 1 = short, 2 = long) */
1538 16, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL16_HIGHESTA", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 0xffff, /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* Like TPREL16, but for insns with a DS field. */
1550 HOWTO (R_PPC64_TPREL16_DS,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16_DS", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xfffc, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16_DS, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO_DS,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO_DS", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xfffc, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1580 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1581 to the first entry relative to the TOC base (r2). */
1582 HOWTO (R_PPC64_GOT_TLSGD16,
1583 0, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_signed, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_GOT_TLSGD16", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like GOT_TLSGD16, but no overflow. */
1597 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1598 0, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_GOT_TLSGD16_LO", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1612 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1613 16, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_GOT_TLSGD16_HI", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1627 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1628 16, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_dont, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_GOT_TLSGD16_HA", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xffff, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1642 with values (sym+add)@dtpmod and zero, and computes the offset to the
1643 first entry relative to the TOC base (r2). */
1644 HOWTO (R_PPC64_GOT_TLSLD16,
1645 0, /* rightshift */
1646 1, /* size (0 = byte, 1 = short, 2 = long) */
1647 16, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_signed, /* complain_on_overflow */
1651 ppc64_elf_unhandled_reloc, /* special_function */
1652 "R_PPC64_GOT_TLSLD16", /* name */
1653 FALSE, /* partial_inplace */
1654 0, /* src_mask */
1655 0xffff, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 /* Like GOT_TLSLD16, but no overflow. */
1659 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1660 0, /* rightshift */
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1662 16, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_GOT_TLSLD16_LO", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1674 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1675 16, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSLD16_HI", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1689 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1690 16, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 FALSE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSLD16_HA", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1702
1703 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1704 the offset to the entry relative to the TOC base (r2). */
1705 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1706 0, /* rightshift */
1707 1, /* size (0 = byte, 1 = short, 2 = long) */
1708 16, /* bitsize */
1709 FALSE, /* pc_relative */
1710 0, /* bitpos */
1711 complain_overflow_signed, /* complain_on_overflow */
1712 ppc64_elf_unhandled_reloc, /* special_function */
1713 "R_PPC64_GOT_DTPREL16_DS", /* name */
1714 FALSE, /* partial_inplace */
1715 0, /* src_mask */
1716 0xfffc, /* dst_mask */
1717 FALSE), /* pcrel_offset */
1718
1719 /* Like GOT_DTPREL16_DS, but no overflow. */
1720 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1721 0, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 FALSE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc64_elf_unhandled_reloc, /* special_function */
1728 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xfffc, /* dst_mask */
1732 FALSE), /* pcrel_offset */
1733
1734 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1735 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1736 16, /* rightshift */
1737 1, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 FALSE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 ppc64_elf_unhandled_reloc, /* special_function */
1743 "R_PPC64_GOT_DTPREL16_HI", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0xffff, /* dst_mask */
1747 FALSE), /* pcrel_offset */
1748
1749 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1750 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1751 16, /* rightshift */
1752 1, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 ppc64_elf_unhandled_reloc, /* special_function */
1758 "R_PPC64_GOT_DTPREL16_HA", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0xffff, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1765 offset to the entry relative to the TOC base (r2). */
1766 HOWTO (R_PPC64_GOT_TPREL16_DS,
1767 0, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_signed, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TPREL16_DS", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xfffc, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Like GOT_TPREL16_DS, but no overflow. */
1781 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1782 0, /* rightshift */
1783 1, /* size (0 = byte, 1 = short, 2 = long) */
1784 16, /* bitsize */
1785 FALSE, /* pc_relative */
1786 0, /* bitpos */
1787 complain_overflow_dont, /* complain_on_overflow */
1788 ppc64_elf_unhandled_reloc, /* special_function */
1789 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1790 FALSE, /* partial_inplace */
1791 0, /* src_mask */
1792 0xfffc, /* dst_mask */
1793 FALSE), /* pcrel_offset */
1794
1795 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1796 HOWTO (R_PPC64_GOT_TPREL16_HI,
1797 16, /* rightshift */
1798 1, /* size (0 = byte, 1 = short, 2 = long) */
1799 16, /* bitsize */
1800 FALSE, /* pc_relative */
1801 0, /* bitpos */
1802 complain_overflow_dont, /* complain_on_overflow */
1803 ppc64_elf_unhandled_reloc, /* special_function */
1804 "R_PPC64_GOT_TPREL16_HI", /* name */
1805 FALSE, /* partial_inplace */
1806 0, /* src_mask */
1807 0xffff, /* dst_mask */
1808 FALSE), /* pcrel_offset */
1809
1810 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1811 HOWTO (R_PPC64_GOT_TPREL16_HA,
1812 16, /* rightshift */
1813 1, /* size (0 = byte, 1 = short, 2 = long) */
1814 16, /* bitsize */
1815 FALSE, /* pc_relative */
1816 0, /* bitpos */
1817 complain_overflow_dont, /* complain_on_overflow */
1818 ppc64_elf_unhandled_reloc, /* special_function */
1819 "R_PPC64_GOT_TPREL16_HA", /* name */
1820 FALSE, /* partial_inplace */
1821 0, /* src_mask */
1822 0xffff, /* dst_mask */
1823 FALSE), /* pcrel_offset */
1824
1825 /* GNU extension to record C++ vtable hierarchy. */
1826 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1827 0, /* rightshift */
1828 0, /* size (0 = byte, 1 = short, 2 = long) */
1829 0, /* bitsize */
1830 FALSE, /* pc_relative */
1831 0, /* bitpos */
1832 complain_overflow_dont, /* complain_on_overflow */
1833 NULL, /* special_function */
1834 "R_PPC64_GNU_VTINHERIT", /* name */
1835 FALSE, /* partial_inplace */
1836 0, /* src_mask */
1837 0, /* dst_mask */
1838 FALSE), /* pcrel_offset */
1839
1840 /* GNU extension to record C++ vtable member usage. */
1841 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1842 0, /* rightshift */
1843 0, /* size (0 = byte, 1 = short, 2 = long) */
1844 0, /* bitsize */
1845 FALSE, /* pc_relative */
1846 0, /* bitpos */
1847 complain_overflow_dont, /* complain_on_overflow */
1848 NULL, /* special_function */
1849 "R_PPC64_GNU_VTENTRY", /* name */
1850 FALSE, /* partial_inplace */
1851 0, /* src_mask */
1852 0, /* dst_mask */
1853 FALSE), /* pcrel_offset */
1854 };
1855
1856 \f
1857 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1858 be done. */
1859
1860 static void
1861 ppc_howto_init ()
1862 {
1863 unsigned int i, type;
1864
1865 for (i = 0;
1866 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1867 i++)
1868 {
1869 type = ppc64_elf_howto_raw[i].type;
1870 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1871 / sizeof (ppc64_elf_howto_table[0])));
1872 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1873 }
1874 }
1875
1876 static reloc_howto_type *
1877 ppc64_elf_reloc_type_lookup (abfd, code)
1878 bfd *abfd ATTRIBUTE_UNUSED;
1879 bfd_reloc_code_real_type code;
1880 {
1881 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1882
1883 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1884 /* Initialize howto table if needed. */
1885 ppc_howto_init ();
1886
1887 switch ((int) code)
1888 {
1889 default:
1890 return (reloc_howto_type *) NULL;
1891
1892 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1893 break;
1894 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1895 break;
1896 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1897 break;
1898 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1899 break;
1900 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1901 break;
1902 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1903 break;
1904 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1905 break;
1906 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1907 break;
1908 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1909 break;
1910 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1911 break;
1912 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1913 break;
1914 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1915 break;
1916 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1917 break;
1918 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1919 break;
1920 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1921 break;
1922 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1923 break;
1924 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1925 break;
1926 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1927 break;
1928 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1929 break;
1930 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1931 break;
1932 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1933 break;
1934 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1935 break;
1936 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1937 break;
1938 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1939 break;
1940 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1941 break;
1942 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1943 break;
1944 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1945 break;
1946 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1947 break;
1948 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1949 break;
1950 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1951 break;
1952 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1953 break;
1954 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1955 break;
1956 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1957 break;
1958 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1959 break;
1960 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1961 break;
1962 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1963 break;
1964 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1965 break;
1966 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1967 break;
1968 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1969 break;
1970 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1971 break;
1972 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1973 break;
1974 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1975 break;
1976 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1977 break;
1978 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1979 break;
1980 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1981 break;
1982 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1983 break;
1984 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1985 break;
1986 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1987 break;
1988 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1989 break;
1990 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1991 break;
1992 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1993 break;
1994 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1995 break;
1996 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1997 break;
1998 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1999 break;
2000 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2001 break;
2002 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2003 break;
2004 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2005 break;
2006 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2007 break;
2008 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2009 break;
2010 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2011 break;
2012 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2013 break;
2014 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2015 break;
2016 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2017 break;
2018 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2019 break;
2020 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2021 break;
2022 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2023 break;
2024 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2025 break;
2026 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2027 break;
2028 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2029 break;
2030 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2031 break;
2032 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2033 break;
2034 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2035 break;
2036 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2037 break;
2038 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2039 break;
2040 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2041 break;
2042 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2043 break;
2044 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2045 break;
2046 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2047 break;
2048 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2049 break;
2050 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2051 break;
2052 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2053 break;
2054 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2057 break;
2058 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2059 break;
2060 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2061 break;
2062 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2063 break;
2064 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2065 break;
2066 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2067 break;
2068 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2069 break;
2070 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2071 break;
2072 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2073 break;
2074 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2075 break;
2076 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2077 break;
2078 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2079 break;
2080 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2081 break;
2082 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2083 break;
2084 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2085 break;
2086 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2087 break;
2088 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2089 break;
2090 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2091 break;
2092 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2093 break;
2094 }
2095
2096 return ppc64_elf_howto_table[(int) r];
2097 };
2098
2099 /* Set the howto pointer for a PowerPC ELF reloc. */
2100
2101 static void
2102 ppc64_elf_info_to_howto (abfd, cache_ptr, dst)
2103 bfd *abfd ATTRIBUTE_UNUSED;
2104 arelent *cache_ptr;
2105 Elf_Internal_Rela *dst;
2106 {
2107 unsigned int type;
2108
2109 /* Initialize howto table if needed. */
2110 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2111 ppc_howto_init ();
2112
2113 type = ELF64_R_TYPE (dst->r_info);
2114 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2115 / sizeof (ppc64_elf_howto_table[0])));
2116 cache_ptr->howto = ppc64_elf_howto_table[type];
2117 }
2118
2119 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2120
2121 static bfd_reloc_status_type
2122 ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data,
2123 input_section, output_bfd, error_message)
2124 bfd *abfd;
2125 arelent *reloc_entry;
2126 asymbol *symbol;
2127 PTR data;
2128 asection *input_section;
2129 bfd *output_bfd;
2130 char **error_message;
2131 {
2132 /* If this is a relocatable link (output_bfd test tells us), just
2133 call the generic function. Any adjustment will be done at final
2134 link time. */
2135 if (output_bfd != NULL)
2136 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2137 input_section, output_bfd, error_message);
2138
2139 /* Adjust the addend for sign extension of the low 16 bits.
2140 We won't actually be using the low 16 bits, so trashing them
2141 doesn't matter. */
2142 reloc_entry->addend += 0x8000;
2143 return bfd_reloc_continue;
2144 }
2145
2146 static bfd_reloc_status_type
2147 ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data,
2148 input_section, output_bfd, error_message)
2149 bfd *abfd;
2150 arelent *reloc_entry;
2151 asymbol *symbol;
2152 PTR data;
2153 asection *input_section;
2154 bfd *output_bfd;
2155 char **error_message;
2156 {
2157 long insn;
2158 enum elf_ppc64_reloc_type r_type;
2159 bfd_size_type octets;
2160 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2161 bfd_boolean is_power4 = FALSE;
2162
2163 /* If this is a relocatable link (output_bfd test tells us), just
2164 call the generic function. Any adjustment will be done at final
2165 link time. */
2166 if (output_bfd != NULL)
2167 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2168 input_section, output_bfd, error_message);
2169
2170 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2171 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2172 insn &= ~(0x01 << 21);
2173 r_type = (enum elf_ppc64_reloc_type) reloc_entry->howto->type;
2174 if (r_type == R_PPC64_ADDR14_BRTAKEN
2175 || r_type == R_PPC64_REL14_BRTAKEN)
2176 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2177
2178 if (is_power4)
2179 {
2180 /* Set 'a' bit. This is 0b00010 in BO field for branch
2181 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2182 for branch on CTR insns (BO == 1a00t or 1a01t). */
2183 if ((insn & (0x14 << 21)) == (0x04 << 21))
2184 insn |= 0x02 << 21;
2185 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2186 insn |= 0x08 << 21;
2187 else
2188 return bfd_reloc_continue;
2189 }
2190 else
2191 {
2192 bfd_vma target = 0;
2193 bfd_vma from;
2194
2195 if (!bfd_is_com_section (symbol->section))
2196 target = symbol->value;
2197 target += symbol->section->output_section->vma;
2198 target += symbol->section->output_offset;
2199 target += reloc_entry->addend;
2200
2201 from = (reloc_entry->address
2202 + input_section->output_offset
2203 + input_section->output_section->vma);
2204
2205 /* Invert 'y' bit if not the default. */
2206 if ((bfd_signed_vma) (target - from) < 0)
2207 insn ^= 0x01 << 21;
2208 }
2209 bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets);
2210 return bfd_reloc_continue;
2211 }
2212
2213 static bfd_reloc_status_type
2214 ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data,
2215 input_section, output_bfd, error_message)
2216 bfd *abfd;
2217 arelent *reloc_entry;
2218 asymbol *symbol;
2219 PTR data;
2220 asection *input_section;
2221 bfd *output_bfd;
2222 char **error_message;
2223 {
2224 /* If this is a relocatable link (output_bfd test tells us), just
2225 call the generic function. Any adjustment will be done at final
2226 link time. */
2227 if (output_bfd != NULL)
2228 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2229 input_section, output_bfd, error_message);
2230
2231 /* Subtract the symbol section base address. */
2232 reloc_entry->addend -= symbol->section->output_section->vma;
2233 return bfd_reloc_continue;
2234 }
2235
2236 static bfd_reloc_status_type
2237 ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data,
2238 input_section, output_bfd, error_message)
2239 bfd *abfd;
2240 arelent *reloc_entry;
2241 asymbol *symbol;
2242 PTR data;
2243 asection *input_section;
2244 bfd *output_bfd;
2245 char **error_message;
2246 {
2247 /* If this is a relocatable link (output_bfd test tells us), just
2248 call the generic function. Any adjustment will be done at final
2249 link time. */
2250 if (output_bfd != NULL)
2251 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2252 input_section, output_bfd, error_message);
2253
2254 /* Subtract the symbol section base address. */
2255 reloc_entry->addend -= symbol->section->output_section->vma;
2256
2257 /* Adjust the addend for sign extension of the low 16 bits. */
2258 reloc_entry->addend += 0x8000;
2259 return bfd_reloc_continue;
2260 }
2261
2262 static bfd_reloc_status_type
2263 ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data,
2264 input_section, output_bfd, error_message)
2265 bfd *abfd;
2266 arelent *reloc_entry;
2267 asymbol *symbol;
2268 PTR data;
2269 asection *input_section;
2270 bfd *output_bfd;
2271 char **error_message;
2272 {
2273 bfd_vma TOCstart;
2274
2275 /* If this is a relocatable link (output_bfd test tells us), just
2276 call the generic function. Any adjustment will be done at final
2277 link time. */
2278 if (output_bfd != NULL)
2279 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2280 input_section, output_bfd, error_message);
2281
2282 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2283 if (TOCstart == 0)
2284 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2285
2286 /* Subtract the TOC base address. */
2287 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2288 return bfd_reloc_continue;
2289 }
2290
2291 static bfd_reloc_status_type
2292 ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data,
2293 input_section, output_bfd, error_message)
2294 bfd *abfd;
2295 arelent *reloc_entry;
2296 asymbol *symbol;
2297 PTR data;
2298 asection *input_section;
2299 bfd *output_bfd;
2300 char **error_message;
2301 {
2302 bfd_vma TOCstart;
2303
2304 /* If this is a relocatable link (output_bfd test tells us), just
2305 call the generic function. Any adjustment will be done at final
2306 link time. */
2307 if (output_bfd != NULL)
2308 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2309 input_section, output_bfd, error_message);
2310
2311 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2312 if (TOCstart == 0)
2313 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2314
2315 /* Subtract the TOC base address. */
2316 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2317
2318 /* Adjust the addend for sign extension of the low 16 bits. */
2319 reloc_entry->addend += 0x8000;
2320 return bfd_reloc_continue;
2321 }
2322
2323 static bfd_reloc_status_type
2324 ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data,
2325 input_section, output_bfd, error_message)
2326 bfd *abfd;
2327 arelent *reloc_entry;
2328 asymbol *symbol;
2329 PTR data;
2330 asection *input_section;
2331 bfd *output_bfd;
2332 char **error_message;
2333 {
2334 bfd_vma TOCstart;
2335 bfd_size_type octets;
2336
2337 /* If this is a relocatable link (output_bfd test tells us), just
2338 call the generic function. Any adjustment will be done at final
2339 link time. */
2340 if (output_bfd != NULL)
2341 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2342 input_section, output_bfd, error_message);
2343
2344 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2345 if (TOCstart == 0)
2346 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2347
2348 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2349 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2350 return bfd_reloc_ok;
2351 }
2352
2353 static bfd_reloc_status_type
2354 ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data,
2355 input_section, output_bfd, error_message)
2356 bfd *abfd;
2357 arelent *reloc_entry;
2358 asymbol *symbol;
2359 PTR data;
2360 asection *input_section;
2361 bfd *output_bfd;
2362 char **error_message;
2363 {
2364 /* If this is a relocatable link (output_bfd test tells us), just
2365 call the generic function. Any adjustment will be done at final
2366 link time. */
2367 if (output_bfd != NULL)
2368 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2369 input_section, output_bfd, error_message);
2370
2371 if (error_message != NULL)
2372 {
2373 static char buf[60];
2374 sprintf (buf, "generic linker can't handle %s",
2375 reloc_entry->howto->name);
2376 *error_message = buf;
2377 }
2378 return bfd_reloc_dangerous;
2379 }
2380
2381 /* Fix bad default arch selected for a 64 bit input bfd when the
2382 default is 32 bit. */
2383
2384 static bfd_boolean
2385 ppc64_elf_object_p (abfd)
2386 bfd *abfd;
2387 {
2388 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2389 {
2390 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2391
2392 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2393 {
2394 /* Relies on arch after 32 bit default being 64 bit default. */
2395 abfd->arch_info = abfd->arch_info->next;
2396 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2397 }
2398 }
2399 return TRUE;
2400 }
2401
2402 /* Merge backend specific data from an object file to the output
2403 object file when linking. */
2404
2405 static bfd_boolean
2406 ppc64_elf_merge_private_bfd_data (ibfd, obfd)
2407 bfd *ibfd;
2408 bfd *obfd;
2409 {
2410 /* Check if we have the same endianess. */
2411 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2412 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2413 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2414 {
2415 const char *msg;
2416
2417 if (bfd_big_endian (ibfd))
2418 msg = _("%s: compiled for a big endian system and target is little endian");
2419 else
2420 msg = _("%s: compiled for a little endian system and target is big endian");
2421
2422 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2423
2424 bfd_set_error (bfd_error_wrong_format);
2425 return FALSE;
2426 }
2427
2428 return TRUE;
2429 }
2430
2431 struct _ppc64_elf_section_data
2432 {
2433 struct bfd_elf_section_data elf;
2434
2435 /* An array with one entry for each opd function descriptor. */
2436 union
2437 {
2438 /* Points to the function code section for local opd entries. */
2439 asection **func_sec;
2440 /* After editing .opd, adjust references to opd local syms. */
2441 long *adjust;
2442 } opd;
2443
2444 /* An array for toc sections, indexed by offset/8.
2445 Specifies the relocation symbol index used at a given toc offset. */
2446 unsigned *t_symndx;
2447 };
2448
2449 #define ppc64_elf_section_data(sec) \
2450 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2451
2452 static bfd_boolean
2453 ppc64_elf_new_section_hook (abfd, sec)
2454 bfd *abfd;
2455 asection *sec;
2456 {
2457 struct _ppc64_elf_section_data *sdata;
2458 bfd_size_type amt = sizeof (*sdata);
2459
2460 sdata = (struct _ppc64_elf_section_data *) bfd_zalloc (abfd, amt);
2461 if (sdata == NULL)
2462 return FALSE;
2463 sec->used_by_bfd = (PTR) sdata;
2464
2465 return _bfd_elf_new_section_hook (abfd, sec);
2466 }
2467 \f
2468 /* The following functions are specific to the ELF linker, while
2469 functions above are used generally. Those named ppc64_elf_* are
2470 called by the main ELF linker code. They appear in this file more
2471 or less in the order in which they are called. eg.
2472 ppc64_elf_check_relocs is called early in the link process,
2473 ppc64_elf_finish_dynamic_sections is one of the last functions
2474 called.
2475
2476 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2477 functions have both a function code symbol and a function descriptor
2478 symbol. A call to foo in a relocatable object file looks like:
2479
2480 . .text
2481 . x:
2482 . bl .foo
2483 . nop
2484
2485 The function definition in another object file might be:
2486
2487 . .section .opd
2488 . foo: .quad .foo
2489 . .quad .TOC.@tocbase
2490 . .quad 0
2491 .
2492 . .text
2493 . .foo: blr
2494
2495 When the linker resolves the call during a static link, the branch
2496 unsurprisingly just goes to .foo and the .opd information is unused.
2497 If the function definition is in a shared library, things are a little
2498 different: The call goes via a plt call stub, the opd information gets
2499 copied to the plt, and the linker patches the nop.
2500
2501 . x:
2502 . bl .foo_stub
2503 . ld 2,40(1)
2504 .
2505 .
2506 . .foo_stub:
2507 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2508 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2509 . std 2,40(1) # this is the general idea
2510 . ld 11,0(12)
2511 . ld 2,8(12)
2512 . mtctr 11
2513 . ld 11,16(12)
2514 . bctr
2515 .
2516 . .section .plt
2517 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2518
2519 The "reloc ()" notation is supposed to indicate that the linker emits
2520 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2521 copying.
2522
2523 What are the difficulties here? Well, firstly, the relocations
2524 examined by the linker in check_relocs are against the function code
2525 sym .foo, while the dynamic relocation in the plt is emitted against
2526 the function descriptor symbol, foo. Somewhere along the line, we need
2527 to carefully copy dynamic link information from one symbol to the other.
2528 Secondly, the generic part of the elf linker will make .foo a dynamic
2529 symbol as is normal for most other backends. We need foo dynamic
2530 instead, at least for an application final link. However, when
2531 creating a shared library containing foo, we need to have both symbols
2532 dynamic so that references to .foo are satisfied during the early
2533 stages of linking. Otherwise the linker might decide to pull in a
2534 definition from some other object, eg. a static library. */
2535
2536 /* The linker needs to keep track of the number of relocs that it
2537 decides to copy as dynamic relocs in check_relocs for each symbol.
2538 This is so that it can later discard them if they are found to be
2539 unnecessary. We store the information in a field extending the
2540 regular ELF linker hash table. */
2541
2542 struct ppc_dyn_relocs
2543 {
2544 struct ppc_dyn_relocs *next;
2545
2546 /* The input section of the reloc. */
2547 asection *sec;
2548
2549 /* Total number of relocs copied for the input section. */
2550 bfd_size_type count;
2551
2552 /* Number of pc-relative relocs copied for the input section. */
2553 bfd_size_type pc_count;
2554 };
2555
2556 /* Track GOT entries needed for a given symbol. We might need more
2557 than one got entry per symbol. */
2558 struct got_entry
2559 {
2560 struct got_entry *next;
2561
2562 /* The symbol addend that we'll be placing in the GOT. */
2563 bfd_vma addend;
2564
2565 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2566 union
2567 {
2568 bfd_signed_vma refcount;
2569 bfd_vma offset;
2570 } got;
2571
2572 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2573 TLS_TPREL or TLS_DTPREL for tls entries. */
2574 char tls_type;
2575 };
2576
2577 /* The same for PLT. */
2578 struct plt_entry
2579 {
2580 struct plt_entry *next;
2581
2582 bfd_vma addend;
2583
2584 union
2585 {
2586 bfd_signed_vma refcount;
2587 bfd_vma offset;
2588 } plt;
2589 };
2590
2591 /* Of those relocs that might be copied as dynamic relocs, this macro
2592 selects those that must be copied when linking a shared library,
2593 even when the symbol is local. */
2594
2595 #define MUST_BE_DYN_RELOC(RTYPE) \
2596 ((RTYPE) != R_PPC64_REL32 \
2597 && (RTYPE) != R_PPC64_REL64 \
2598 && (RTYPE) != R_PPC64_REL30)
2599
2600 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2601 copying dynamic variables from a shared lib into an app's dynbss
2602 section, and instead use a dynamic relocation to point into the
2603 shared lib. */
2604 #define ELIMINATE_COPY_RELOCS 1
2605
2606 /* Section name for stubs is the associated section name plus this
2607 string. */
2608 #define STUB_SUFFIX ".stub"
2609
2610 /* Linker stubs.
2611 ppc_stub_long_branch:
2612 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2613 destination, but a 24 bit branch in a stub section will reach.
2614 . b dest
2615
2616 ppc_stub_plt_branch:
2617 Similar to the above, but a 24 bit branch in the stub section won't
2618 reach its destination.
2619 . addis %r12,%r2,xxx@toc@ha
2620 . ld %r11,xxx@toc@l(%r12)
2621 . mtctr %r11
2622 . bctr
2623
2624 ppc_stub_plt_call:
2625 Used to call a function in a shared library.
2626 . addis %r12,%r2,xxx@toc@ha
2627 . std %r2,40(%r1)
2628 . ld %r11,xxx+0@toc@l(%r12)
2629 . ld %r2,xxx+8@toc@l(%r12)
2630 . mtctr %r11
2631 . ld %r11,xxx+16@toc@l(%r12)
2632 . bctr
2633
2634 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2635 code to adjust the value and save r2 to support multiple toc sections.
2636 A ppc_stub_long_branch with an r2 offset looks like:
2637 . std %r2,40(%r1)
2638 . addis %r2,%r2,off@ha
2639 . addi %r2,%r2,off@l
2640 . b dest
2641
2642 A ppc_stub_plt_branch with an r2 offset looks like:
2643 . std %r2,40(%r1)
2644 . addis %r12,%r2,xxx@toc@ha
2645 . ld %r11,xxx@toc@l(%r12)
2646 . addis %r2,%r2,off@ha
2647 . addi %r2,%r2,off@l
2648 . mtctr %r11
2649 . bctr
2650 */
2651
2652 enum ppc_stub_type {
2653 ppc_stub_none,
2654 ppc_stub_long_branch,
2655 ppc_stub_long_branch_r2off,
2656 ppc_stub_plt_branch,
2657 ppc_stub_plt_branch_r2off,
2658 ppc_stub_plt_call
2659 };
2660
2661 struct ppc_stub_hash_entry {
2662
2663 /* Base hash table entry structure. */
2664 struct bfd_hash_entry root;
2665
2666 enum ppc_stub_type stub_type;
2667
2668 /* The stub section. */
2669 asection *stub_sec;
2670
2671 /* Offset within stub_sec of the beginning of this stub. */
2672 bfd_vma stub_offset;
2673
2674 /* Given the symbol's value and its section we can determine its final
2675 value when building the stubs (so the stub knows where to jump. */
2676 bfd_vma target_value;
2677 asection *target_section;
2678
2679 /* The symbol table entry, if any, that this was derived from. */
2680 struct ppc_link_hash_entry *h;
2681
2682 /* And the reloc addend that this was derived from. */
2683 bfd_vma addend;
2684
2685 /* Where this stub is being called from, or, in the case of combined
2686 stub sections, the first input section in the group. */
2687 asection *id_sec;
2688 };
2689
2690 struct ppc_branch_hash_entry {
2691
2692 /* Base hash table entry structure. */
2693 struct bfd_hash_entry root;
2694
2695 /* Offset within .branch_lt. */
2696 unsigned int offset;
2697
2698 /* Generation marker. */
2699 unsigned int iter;
2700 };
2701
2702 struct ppc_link_hash_entry
2703 {
2704 struct elf_link_hash_entry elf;
2705
2706 /* A pointer to the most recently used stub hash entry against this
2707 symbol. */
2708 struct ppc_stub_hash_entry *stub_cache;
2709
2710 /* Track dynamic relocs copied for this symbol. */
2711 struct ppc_dyn_relocs *dyn_relocs;
2712
2713 /* Link between function code and descriptor symbols. */
2714 struct elf_link_hash_entry *oh;
2715
2716 /* Flag function code and descriptor symbols. */
2717 unsigned int is_func:1;
2718 unsigned int is_func_descriptor:1;
2719 unsigned int is_entry:1;
2720
2721 /* Contexts in which symbol is used in the GOT (or TOC).
2722 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2723 corresponding relocs are encountered during check_relocs.
2724 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2725 indicate the corresponding GOT entry type is not needed.
2726 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2727 a TPREL one. We use a separate flag rather than setting TPREL
2728 just for convenience in distinguishing the two cases. */
2729 #define TLS_GD 1 /* GD reloc. */
2730 #define TLS_LD 2 /* LD reloc. */
2731 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2732 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2733 #define TLS_TLS 16 /* Any TLS reloc. */
2734 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2735 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2736 char tls_mask;
2737 };
2738
2739 /* ppc64 ELF linker hash table. */
2740
2741 struct ppc_link_hash_table
2742 {
2743 struct elf_link_hash_table elf;
2744
2745 /* The stub hash table. */
2746 struct bfd_hash_table stub_hash_table;
2747
2748 /* Another hash table for plt_branch stubs. */
2749 struct bfd_hash_table branch_hash_table;
2750
2751 /* Linker stub bfd. */
2752 bfd *stub_bfd;
2753
2754 /* Linker call-backs. */
2755 asection * (*add_stub_section) PARAMS ((const char *, asection *));
2756 void (*layout_sections_again) PARAMS ((void));
2757
2758 /* Array to keep track of which stub sections have been created, and
2759 information on stub grouping. */
2760 struct map_stub {
2761 /* This is the section to which stubs in the group will be attached. */
2762 asection *link_sec;
2763 /* The stub section. */
2764 asection *stub_sec;
2765 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2766 bfd_vma toc_off;
2767 } *stub_group;
2768
2769 /* Support for multiple toc sections. */
2770 unsigned int no_multi_toc;
2771 unsigned int multi_toc_needed;
2772
2773 /* Temp used when calculating TOC pointers. */
2774 bfd_vma toc_curr;
2775
2776 /* Highest output section index. */
2777 int top_index;
2778
2779 /* List of input sections for each output section. */
2780 asection **input_list;
2781
2782 /* Short-cuts to get to dynamic linker sections. */
2783 asection *sgot;
2784 asection *srelgot;
2785 asection *splt;
2786 asection *srelplt;
2787 asection *sdynbss;
2788 asection *srelbss;
2789 asection *sglink;
2790 asection *sfpr;
2791 asection *sbrlt;
2792 asection *srelbrlt;
2793
2794 /* Short-cut to first output tls section. */
2795 asection *tls_sec;
2796
2797 /* Shortcut to .__tls_get_addr. */
2798 struct elf_link_hash_entry *tls_get_addr;
2799
2800 /* TLS local dynamic got entry handling. */
2801 union {
2802 bfd_signed_vma refcount;
2803 bfd_vma offset;
2804 } tlsld_got;
2805
2806 /* Set if we should emit symbols for stubs. */
2807 unsigned int emit_stub_syms;
2808
2809 /* Set on error. */
2810 unsigned int stub_error;
2811
2812 /* Flag set when small branches are detected. Used to
2813 select suitable defaults for the stub group size. */
2814 unsigned int has_14bit_branch;
2815
2816 /* Set if we detect a reference undefined weak symbol. */
2817 unsigned int have_undefweak;
2818
2819 /* Incremented every time we size stubs. */
2820 unsigned int stub_iteration;
2821
2822 /* Small local sym to section mapping cache. */
2823 struct sym_sec_cache sym_sec;
2824 };
2825
2826 static struct bfd_hash_entry *stub_hash_newfunc
2827 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
2828 static struct bfd_hash_entry *branch_hash_newfunc
2829 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
2830 static struct bfd_hash_entry *link_hash_newfunc
2831 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
2832 static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
2833 PARAMS ((bfd *));
2834 static void ppc64_elf_link_hash_table_free
2835 PARAMS ((struct bfd_link_hash_table *));
2836 static char *ppc_stub_name
2837 PARAMS ((const asection *, const asection *,
2838 const struct ppc_link_hash_entry *, const Elf_Internal_Rela *));
2839 static struct ppc_stub_hash_entry *ppc_get_stub_entry
2840 PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *,
2841 const Elf_Internal_Rela *, struct ppc_link_hash_table *));
2842 static struct ppc_stub_hash_entry *ppc_add_stub
2843 PARAMS ((const char *, asection *, struct ppc_link_hash_table *));
2844 static bfd_boolean create_linkage_sections
2845 PARAMS ((bfd *, struct bfd_link_info *));
2846 static bfd_boolean create_got_section
2847 PARAMS ((bfd *, struct bfd_link_info *));
2848 static bfd_boolean ppc64_elf_create_dynamic_sections
2849 PARAMS ((bfd *, struct bfd_link_info *));
2850 static void ppc64_elf_copy_indirect_symbol
2851 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
2852 struct elf_link_hash_entry *));
2853 static bfd_boolean update_local_sym_info
2854 PARAMS ((bfd *, Elf_Internal_Shdr *, unsigned long, bfd_vma, int));
2855 static bfd_boolean update_plt_info
2856 PARAMS ((bfd *, struct ppc_link_hash_entry *, bfd_vma));
2857 static bfd_boolean ppc64_elf_check_relocs
2858 PARAMS ((bfd *, struct bfd_link_info *, asection *,
2859 const Elf_Internal_Rela *));
2860 static asection * ppc64_elf_gc_mark_hook
2861 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
2862 struct elf_link_hash_entry *, Elf_Internal_Sym *));
2863 static bfd_boolean ppc64_elf_gc_sweep_hook
2864 PARAMS ((bfd *, struct bfd_link_info *, asection *,
2865 const Elf_Internal_Rela *));
2866 static bfd_boolean func_desc_adjust
2867 PARAMS ((struct elf_link_hash_entry *, PTR));
2868 static bfd_boolean ppc64_elf_func_desc_adjust
2869 PARAMS ((bfd *, struct bfd_link_info *));
2870 static bfd_boolean ppc64_elf_adjust_dynamic_symbol
2871 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
2872 static void ppc64_elf_hide_symbol
2873 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
2874 static bfd_boolean get_sym_h
2875 PARAMS ((struct elf_link_hash_entry **, Elf_Internal_Sym **, asection **,
2876 char **, Elf_Internal_Sym **, unsigned long, bfd *));
2877 static int get_tls_mask
2878 PARAMS ((char **, Elf_Internal_Sym **, const Elf_Internal_Rela *, bfd *));
2879 static bfd_boolean allocate_dynrelocs
2880 PARAMS ((struct elf_link_hash_entry *, PTR));
2881 static bfd_boolean readonly_dynrelocs
2882 PARAMS ((struct elf_link_hash_entry *, PTR));
2883 static enum elf_reloc_type_class ppc64_elf_reloc_type_class
2884 PARAMS ((const Elf_Internal_Rela *));
2885 static bfd_boolean ppc64_elf_size_dynamic_sections
2886 PARAMS ((bfd *, struct bfd_link_info *));
2887 static enum ppc_stub_type ppc_type_of_stub
2888 PARAMS ((asection *, const Elf_Internal_Rela *,
2889 struct ppc_link_hash_entry **, bfd_vma));
2890 static bfd_byte *build_plt_stub
2891 PARAMS ((bfd *, bfd_byte *, int));
2892 static bfd_boolean ppc_build_one_stub
2893 PARAMS ((struct bfd_hash_entry *, PTR));
2894 static bfd_boolean ppc_size_one_stub
2895 PARAMS ((struct bfd_hash_entry *, PTR));
2896 static void group_sections
2897 PARAMS ((struct ppc_link_hash_table *, bfd_size_type, bfd_boolean));
2898 static bfd_boolean ppc64_elf_relocate_section
2899 PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
2900 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
2901 asection **));
2902 static bfd_boolean ppc64_elf_finish_dynamic_symbol
2903 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
2904 Elf_Internal_Sym *));
2905 static bfd_boolean ppc64_elf_finish_dynamic_sections
2906 PARAMS ((bfd *, struct bfd_link_info *));
2907
2908 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2909
2910 #define ppc_hash_table(p) \
2911 ((struct ppc_link_hash_table *) ((p)->hash))
2912
2913 #define ppc_stub_hash_lookup(table, string, create, copy) \
2914 ((struct ppc_stub_hash_entry *) \
2915 bfd_hash_lookup ((table), (string), (create), (copy)))
2916
2917 #define ppc_branch_hash_lookup(table, string, create, copy) \
2918 ((struct ppc_branch_hash_entry *) \
2919 bfd_hash_lookup ((table), (string), (create), (copy)))
2920
2921 /* Create an entry in the stub hash table. */
2922
2923 static struct bfd_hash_entry *
2924 stub_hash_newfunc (entry, table, string)
2925 struct bfd_hash_entry *entry;
2926 struct bfd_hash_table *table;
2927 const char *string;
2928 {
2929 /* Allocate the structure if it has not already been allocated by a
2930 subclass. */
2931 if (entry == NULL)
2932 {
2933 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2934 if (entry == NULL)
2935 return entry;
2936 }
2937
2938 /* Call the allocation method of the superclass. */
2939 entry = bfd_hash_newfunc (entry, table, string);
2940 if (entry != NULL)
2941 {
2942 struct ppc_stub_hash_entry *eh;
2943
2944 /* Initialize the local fields. */
2945 eh = (struct ppc_stub_hash_entry *) entry;
2946 eh->stub_type = ppc_stub_none;
2947 eh->stub_sec = NULL;
2948 eh->stub_offset = 0;
2949 eh->target_value = 0;
2950 eh->target_section = NULL;
2951 eh->h = NULL;
2952 eh->id_sec = NULL;
2953 }
2954
2955 return entry;
2956 }
2957
2958 /* Create an entry in the branch hash table. */
2959
2960 static struct bfd_hash_entry *
2961 branch_hash_newfunc (entry, table, string)
2962 struct bfd_hash_entry *entry;
2963 struct bfd_hash_table *table;
2964 const char *string;
2965 {
2966 /* Allocate the structure if it has not already been allocated by a
2967 subclass. */
2968 if (entry == NULL)
2969 {
2970 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2971 if (entry == NULL)
2972 return entry;
2973 }
2974
2975 /* Call the allocation method of the superclass. */
2976 entry = bfd_hash_newfunc (entry, table, string);
2977 if (entry != NULL)
2978 {
2979 struct ppc_branch_hash_entry *eh;
2980
2981 /* Initialize the local fields. */
2982 eh = (struct ppc_branch_hash_entry *) entry;
2983 eh->offset = 0;
2984 eh->iter = 0;
2985 }
2986
2987 return entry;
2988 }
2989
2990 /* Create an entry in a ppc64 ELF linker hash table. */
2991
2992 static struct bfd_hash_entry *
2993 link_hash_newfunc (entry, table, string)
2994 struct bfd_hash_entry *entry;
2995 struct bfd_hash_table *table;
2996 const char *string;
2997 {
2998 /* Allocate the structure if it has not already been allocated by a
2999 subclass. */
3000 if (entry == NULL)
3001 {
3002 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3003 if (entry == NULL)
3004 return entry;
3005 }
3006
3007 /* Call the allocation method of the superclass. */
3008 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3009 if (entry != NULL)
3010 {
3011 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3012
3013 eh->stub_cache = NULL;
3014 eh->dyn_relocs = NULL;
3015 eh->oh = NULL;
3016 eh->is_func = 0;
3017 eh->is_func_descriptor = 0;
3018 eh->is_entry = 0;
3019 eh->tls_mask = 0;
3020 }
3021
3022 return entry;
3023 }
3024
3025 /* Create a ppc64 ELF linker hash table. */
3026
3027 static struct bfd_link_hash_table *
3028 ppc64_elf_link_hash_table_create (abfd)
3029 bfd *abfd;
3030 {
3031 struct ppc_link_hash_table *htab;
3032 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3033
3034 htab = (struct ppc_link_hash_table *) bfd_malloc (amt);
3035 if (htab == NULL)
3036 return NULL;
3037
3038 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3039 {
3040 free (htab);
3041 return NULL;
3042 }
3043
3044 /* Init the stub hash table too. */
3045 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3046 return NULL;
3047
3048 /* And the branch hash table. */
3049 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3050 return NULL;
3051
3052 htab->stub_bfd = NULL;
3053 htab->add_stub_section = NULL;
3054 htab->layout_sections_again = NULL;
3055 htab->stub_group = NULL;
3056 htab->no_multi_toc = 0;
3057 htab->multi_toc_needed = 0;
3058 htab->toc_curr = 0;
3059 htab->sgot = NULL;
3060 htab->srelgot = NULL;
3061 htab->splt = NULL;
3062 htab->srelplt = NULL;
3063 htab->sdynbss = NULL;
3064 htab->srelbss = NULL;
3065 htab->sglink = NULL;
3066 htab->sfpr = NULL;
3067 htab->sbrlt = NULL;
3068 htab->srelbrlt = NULL;
3069 htab->tls_sec = NULL;
3070 htab->tls_get_addr = NULL;
3071 htab->tlsld_got.refcount = 0;
3072 htab->emit_stub_syms = 0;
3073 htab->stub_error = 0;
3074 htab->has_14bit_branch = 0;
3075 htab->have_undefweak = 0;
3076 htab->stub_iteration = 0;
3077 htab->sym_sec.abfd = NULL;
3078 /* Initializing two fields of the union is just cosmetic. We really
3079 only care about glist, but when compiled on a 32-bit host the
3080 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3081 debugger inspection of these fields look nicer. */
3082 htab->elf.init_refcount.refcount = 0;
3083 htab->elf.init_refcount.glist = NULL;
3084 htab->elf.init_offset.offset = 0;
3085 htab->elf.init_offset.glist = NULL;
3086
3087 return &htab->elf.root;
3088 }
3089
3090 /* Free the derived linker hash table. */
3091
3092 static void
3093 ppc64_elf_link_hash_table_free (hash)
3094 struct bfd_link_hash_table *hash;
3095 {
3096 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3097
3098 bfd_hash_table_free (&ret->stub_hash_table);
3099 bfd_hash_table_free (&ret->branch_hash_table);
3100 _bfd_generic_link_hash_table_free (hash);
3101 }
3102
3103 /* Build a name for an entry in the stub hash table. */
3104
3105 static char *
3106 ppc_stub_name (input_section, sym_sec, h, rel)
3107 const asection *input_section;
3108 const asection *sym_sec;
3109 const struct ppc_link_hash_entry *h;
3110 const Elf_Internal_Rela *rel;
3111 {
3112 char *stub_name;
3113 bfd_size_type len;
3114
3115 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3116 offsets from a sym as a branch target? In fact, we could
3117 probably assume the addend is always zero. */
3118 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3119
3120 if (h)
3121 {
3122 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3123 stub_name = bfd_malloc (len);
3124 if (stub_name != NULL)
3125 {
3126 sprintf (stub_name, "%08x_%s+%x",
3127 input_section->id & 0xffffffff,
3128 h->elf.root.root.string,
3129 (int) rel->r_addend & 0xffffffff);
3130 }
3131 }
3132 else
3133 {
3134 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3135 stub_name = bfd_malloc (len);
3136 if (stub_name != NULL)
3137 {
3138 sprintf (stub_name, "%08x_%x:%x+%x",
3139 input_section->id & 0xffffffff,
3140 sym_sec->id & 0xffffffff,
3141 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3142 (int) rel->r_addend & 0xffffffff);
3143 }
3144 }
3145 return stub_name;
3146 }
3147
3148 /* Look up an entry in the stub hash. Stub entries are cached because
3149 creating the stub name takes a bit of time. */
3150
3151 static struct ppc_stub_hash_entry *
3152 ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab)
3153 const asection *input_section;
3154 const asection *sym_sec;
3155 struct elf_link_hash_entry *hash;
3156 const Elf_Internal_Rela *rel;
3157 struct ppc_link_hash_table *htab;
3158 {
3159 struct ppc_stub_hash_entry *stub_entry;
3160 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3161 const asection *id_sec;
3162
3163 /* If this input section is part of a group of sections sharing one
3164 stub section, then use the id of the first section in the group.
3165 Stub names need to include a section id, as there may well be
3166 more than one stub used to reach say, printf, and we need to
3167 distinguish between them. */
3168 id_sec = htab->stub_group[input_section->id].link_sec;
3169
3170 if (h != NULL && h->stub_cache != NULL
3171 && h->stub_cache->h == h
3172 && h->stub_cache->id_sec == id_sec)
3173 {
3174 stub_entry = h->stub_cache;
3175 }
3176 else
3177 {
3178 char *stub_name;
3179
3180 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3181 if (stub_name == NULL)
3182 return NULL;
3183
3184 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3185 stub_name, FALSE, FALSE);
3186 if (h != NULL)
3187 h->stub_cache = stub_entry;
3188
3189 free (stub_name);
3190 }
3191
3192 return stub_entry;
3193 }
3194
3195 /* Add a new stub entry to the stub hash. Not all fields of the new
3196 stub entry are initialised. */
3197
3198 static struct ppc_stub_hash_entry *
3199 ppc_add_stub (stub_name, section, htab)
3200 const char *stub_name;
3201 asection *section;
3202 struct ppc_link_hash_table *htab;
3203 {
3204 asection *link_sec;
3205 asection *stub_sec;
3206 struct ppc_stub_hash_entry *stub_entry;
3207
3208 link_sec = htab->stub_group[section->id].link_sec;
3209 stub_sec = htab->stub_group[section->id].stub_sec;
3210 if (stub_sec == NULL)
3211 {
3212 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3213 if (stub_sec == NULL)
3214 {
3215 size_t namelen;
3216 bfd_size_type len;
3217 char *s_name;
3218
3219 namelen = strlen (link_sec->name);
3220 len = namelen + sizeof (STUB_SUFFIX);
3221 s_name = bfd_alloc (htab->stub_bfd, len);
3222 if (s_name == NULL)
3223 return NULL;
3224
3225 memcpy (s_name, link_sec->name, namelen);
3226 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3227 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3228 if (stub_sec == NULL)
3229 return NULL;
3230 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3231 }
3232 htab->stub_group[section->id].stub_sec = stub_sec;
3233 }
3234
3235 /* Enter this entry into the linker stub hash table. */
3236 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3237 TRUE, FALSE);
3238 if (stub_entry == NULL)
3239 {
3240 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3241 bfd_archive_filename (section->owner),
3242 stub_name);
3243 return NULL;
3244 }
3245
3246 stub_entry->stub_sec = stub_sec;
3247 stub_entry->stub_offset = 0;
3248 stub_entry->id_sec = link_sec;
3249 return stub_entry;
3250 }
3251
3252 /* Create sections for linker generated code. */
3253
3254 static bfd_boolean
3255 create_linkage_sections (dynobj, info)
3256 bfd *dynobj;
3257 struct bfd_link_info *info;
3258 {
3259 struct ppc_link_hash_table *htab;
3260 flagword flags;
3261
3262 htab = ppc_hash_table (info);
3263
3264 /* Create .sfpr for code to save and restore fp regs. */
3265 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3266 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3267 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3268 if (htab->sfpr == NULL
3269 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3270 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3271 return FALSE;
3272
3273 /* Create .glink for lazy dynamic linking support. */
3274 htab->sglink = bfd_make_section_anyway (dynobj, ".glink");
3275 if (htab->sglink == NULL
3276 || ! bfd_set_section_flags (dynobj, htab->sglink, flags)
3277 || ! bfd_set_section_alignment (dynobj, htab->sglink, 2))
3278 return FALSE;
3279
3280 /* Create .branch_lt for plt_branch stubs. */
3281 flags = (SEC_ALLOC | SEC_LOAD
3282 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3283 htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3284 if (htab->sbrlt == NULL
3285 || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags)
3286 || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3))
3287 return FALSE;
3288
3289 if (info->shared)
3290 {
3291 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3292 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3293 htab->srelbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3294 if (!htab->srelbrlt
3295 || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags)
3296 || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3))
3297 return FALSE;
3298 }
3299 return TRUE;
3300 }
3301
3302 /* Create .got and .rela.got sections in DYNOBJ, and set up
3303 shortcuts to them in our hash table. */
3304
3305 static bfd_boolean
3306 create_got_section (dynobj, info)
3307 bfd *dynobj;
3308 struct bfd_link_info *info;
3309 {
3310 struct ppc_link_hash_table *htab;
3311
3312 if (! _bfd_elf_create_got_section (dynobj, info))
3313 return FALSE;
3314
3315 htab = ppc_hash_table (info);
3316 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
3317 if (!htab->sgot)
3318 abort ();
3319
3320 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
3321 if (!htab->srelgot
3322 || ! bfd_set_section_flags (dynobj, htab->srelgot,
3323 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3324 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3325 | SEC_READONLY))
3326 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
3327 return FALSE;
3328 return TRUE;
3329 }
3330
3331 /* Create the dynamic sections, and set up shortcuts. */
3332
3333 static bfd_boolean
3334 ppc64_elf_create_dynamic_sections (dynobj, info)
3335 bfd *dynobj;
3336 struct bfd_link_info *info;
3337 {
3338 struct ppc_link_hash_table *htab;
3339
3340 htab = ppc_hash_table (info);
3341 if (!htab->sgot && !create_got_section (dynobj, info))
3342 return FALSE;
3343
3344 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3345 return FALSE;
3346
3347 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
3348 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3349 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3350 if (!info->shared)
3351 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3352
3353 if (!htab->splt || !htab->srelplt || !htab->sdynbss
3354 || (!info->shared && !htab->srelbss))
3355 abort ();
3356
3357 return TRUE;
3358 }
3359
3360 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3361
3362 static void
3363 ppc64_elf_copy_indirect_symbol (bed, dir, ind)
3364 struct elf_backend_data *bed ATTRIBUTE_UNUSED;
3365 struct elf_link_hash_entry *dir, *ind;
3366 {
3367 struct ppc_link_hash_entry *edir, *eind;
3368 flagword mask;
3369
3370 edir = (struct ppc_link_hash_entry *) dir;
3371 eind = (struct ppc_link_hash_entry *) ind;
3372
3373 /* Copy over any dynamic relocs we may have on the indirect sym. */
3374 if (eind->dyn_relocs != NULL)
3375 {
3376 if (edir->dyn_relocs != NULL)
3377 {
3378 struct ppc_dyn_relocs **pp;
3379 struct ppc_dyn_relocs *p;
3380
3381 if (eind->elf.root.type == bfd_link_hash_indirect)
3382 abort ();
3383
3384 /* Add reloc counts against the weak sym to the strong sym
3385 list. Merge any entries against the same section. */
3386 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3387 {
3388 struct ppc_dyn_relocs *q;
3389
3390 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3391 if (q->sec == p->sec)
3392 {
3393 q->pc_count += p->pc_count;
3394 q->count += p->count;
3395 *pp = p->next;
3396 break;
3397 }
3398 if (q == NULL)
3399 pp = &p->next;
3400 }
3401 *pp = edir->dyn_relocs;
3402 }
3403
3404 edir->dyn_relocs = eind->dyn_relocs;
3405 eind->dyn_relocs = NULL;
3406 }
3407
3408 edir->is_func |= eind->is_func;
3409 edir->is_func_descriptor |= eind->is_func_descriptor;
3410 edir->is_entry |= eind->is_entry;
3411 edir->tls_mask |= eind->tls_mask;
3412
3413 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3414 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF);
3415 /* If called to transfer flags for a weakdef during processing
3416 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3417 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3418 if (ELIMINATE_COPY_RELOCS
3419 && eind->elf.root.type != bfd_link_hash_indirect
3420 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3421 mask &= ~ELF_LINK_NON_GOT_REF;
3422
3423 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3424
3425 /* If we were called to copy over info for a weak sym, that's all. */
3426 if (eind->elf.root.type != bfd_link_hash_indirect)
3427 return;
3428
3429 /* Copy over got entries that we may have already seen to the
3430 symbol which just became indirect. */
3431 if (eind->elf.got.glist != NULL)
3432 {
3433 if (edir->elf.got.glist != NULL)
3434 {
3435 struct got_entry **entp;
3436 struct got_entry *ent;
3437
3438 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3439 {
3440 struct got_entry *dent;
3441
3442 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3443 if (dent->addend == ent->addend
3444 && dent->tls_type == ent->tls_type)
3445 {
3446 dent->got.refcount += ent->got.refcount;
3447 *entp = ent->next;
3448 break;
3449 }
3450 if (dent == NULL)
3451 entp = &ent->next;
3452 }
3453 *entp = edir->elf.got.glist;
3454 }
3455
3456 edir->elf.got.glist = eind->elf.got.glist;
3457 eind->elf.got.glist = NULL;
3458 }
3459
3460 /* And plt entries. */
3461 if (eind->elf.plt.plist != NULL)
3462 {
3463 if (edir->elf.plt.plist != NULL)
3464 {
3465 struct plt_entry **entp;
3466 struct plt_entry *ent;
3467
3468 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3469 {
3470 struct plt_entry *dent;
3471
3472 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3473 if (dent->addend == ent->addend)
3474 {
3475 dent->plt.refcount += ent->plt.refcount;
3476 *entp = ent->next;
3477 break;
3478 }
3479 if (dent == NULL)
3480 entp = &ent->next;
3481 }
3482 *entp = edir->elf.plt.plist;
3483 }
3484
3485 edir->elf.plt.plist = eind->elf.plt.plist;
3486 eind->elf.plt.plist = NULL;
3487 }
3488
3489 if (edir->elf.dynindx == -1)
3490 {
3491 edir->elf.dynindx = eind->elf.dynindx;
3492 edir->elf.dynstr_index = eind->elf.dynstr_index;
3493 eind->elf.dynindx = -1;
3494 eind->elf.dynstr_index = 0;
3495 }
3496 else
3497 BFD_ASSERT (eind->elf.dynindx == -1);
3498 }
3499
3500 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3501 symbols undefined on the command-line. */
3502
3503 bfd_boolean
3504 ppc64_elf_mark_entry_syms (info)
3505 struct bfd_link_info *info;
3506 {
3507 struct ppc_link_hash_table *htab;
3508 struct bfd_sym_chain *sym;
3509
3510 htab = ppc_hash_table (info);
3511 for (sym = info->gc_sym_list; sym; sym = sym->next)
3512 {
3513 struct elf_link_hash_entry *h;
3514
3515 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3516 if (h != NULL)
3517 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3518 }
3519 return TRUE;
3520 }
3521
3522 static bfd_boolean
3523 update_local_sym_info (abfd, symtab_hdr, r_symndx, r_addend, tls_type)
3524 bfd *abfd;
3525 Elf_Internal_Shdr *symtab_hdr;
3526 unsigned long r_symndx;
3527 bfd_vma r_addend;
3528 int tls_type;
3529 {
3530 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3531 char *local_got_tls_masks;
3532
3533 if (local_got_ents == NULL)
3534 {
3535 bfd_size_type size = symtab_hdr->sh_info;
3536
3537 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3538 local_got_ents = (struct got_entry **) bfd_zalloc (abfd, size);
3539 if (local_got_ents == NULL)
3540 return FALSE;
3541 elf_local_got_ents (abfd) = local_got_ents;
3542 }
3543
3544 if ((tls_type & TLS_EXPLICIT) == 0)
3545 {
3546 struct got_entry *ent;
3547
3548 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3549 if (ent->addend == r_addend && ent->tls_type == tls_type)
3550 break;
3551 if (ent == NULL)
3552 {
3553 bfd_size_type amt = sizeof (*ent);
3554 ent = (struct got_entry *) bfd_alloc (abfd, amt);
3555 if (ent == NULL)
3556 return FALSE;
3557 ent->next = local_got_ents[r_symndx];
3558 ent->addend = r_addend;
3559 ent->tls_type = tls_type;
3560 ent->got.refcount = 0;
3561 local_got_ents[r_symndx] = ent;
3562 }
3563 ent->got.refcount += 1;
3564 }
3565
3566 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3567 local_got_tls_masks[r_symndx] |= tls_type;
3568 return TRUE;
3569 }
3570
3571 static bfd_boolean
3572 update_plt_info (abfd, eh, addend)
3573 bfd *abfd;
3574 struct ppc_link_hash_entry *eh;
3575 bfd_vma addend;
3576 {
3577 struct plt_entry *ent;
3578
3579 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3580 if (ent->addend == addend)
3581 break;
3582 if (ent == NULL)
3583 {
3584 bfd_size_type amt = sizeof (*ent);
3585 ent = (struct plt_entry *) bfd_alloc (abfd, amt);
3586 if (ent == NULL)
3587 return FALSE;
3588 ent->next = eh->elf.plt.plist;
3589 ent->addend = addend;
3590 ent->plt.refcount = 0;
3591 eh->elf.plt.plist = ent;
3592 }
3593 ent->plt.refcount += 1;
3594 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3595 eh->is_func = 1;
3596 return TRUE;
3597 }
3598
3599 /* Look through the relocs for a section during the first phase, and
3600 calculate needed space in the global offset table, procedure
3601 linkage table, and dynamic reloc sections. */
3602
3603 static bfd_boolean
3604 ppc64_elf_check_relocs (abfd, info, sec, relocs)
3605 bfd *abfd;
3606 struct bfd_link_info *info;
3607 asection *sec;
3608 const Elf_Internal_Rela *relocs;
3609 {
3610 struct ppc_link_hash_table *htab;
3611 Elf_Internal_Shdr *symtab_hdr;
3612 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3613 const Elf_Internal_Rela *rel;
3614 const Elf_Internal_Rela *rel_end;
3615 asection *sreloc;
3616 asection **opd_sym_map;
3617
3618 if (info->relocateable)
3619 return TRUE;
3620
3621 htab = ppc_hash_table (info);
3622 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3623
3624 sym_hashes = elf_sym_hashes (abfd);
3625 sym_hashes_end = (sym_hashes
3626 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3627 - symtab_hdr->sh_info);
3628
3629 sreloc = NULL;
3630 opd_sym_map = NULL;
3631 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3632 {
3633 /* Garbage collection needs some extra help with .opd sections.
3634 We don't want to necessarily keep everything referenced by
3635 relocs in .opd, as that would keep all functions. Instead,
3636 if we reference an .opd symbol (a function descriptor), we
3637 want to keep the function code symbol's section. This is
3638 easy for global symbols, but for local syms we need to keep
3639 information about the associated function section. Later, if
3640 edit_opd deletes entries, we'll use this array to adjust
3641 local syms in .opd. */
3642 union opd_info {
3643 asection *func_section;
3644 long entry_adjust;
3645 };
3646 bfd_size_type amt;
3647
3648 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3649 opd_sym_map = (asection **) bfd_zalloc (abfd, amt);
3650 if (opd_sym_map == NULL)
3651 return FALSE;
3652 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3653 }
3654
3655 if (htab->elf.dynobj == NULL)
3656 htab->elf.dynobj = abfd;
3657 if (htab->sfpr == NULL
3658 && !create_linkage_sections (htab->elf.dynobj, info))
3659 return FALSE;
3660
3661 rel_end = relocs + sec->reloc_count;
3662 for (rel = relocs; rel < rel_end; rel++)
3663 {
3664 unsigned long r_symndx;
3665 struct elf_link_hash_entry *h;
3666 enum elf_ppc64_reloc_type r_type;
3667 int tls_type = 0;
3668
3669 r_symndx = ELF64_R_SYM (rel->r_info);
3670 if (r_symndx < symtab_hdr->sh_info)
3671 h = NULL;
3672 else
3673 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3674
3675 r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
3676 switch (r_type)
3677 {
3678 case R_PPC64_GOT_TLSLD16:
3679 case R_PPC64_GOT_TLSLD16_LO:
3680 case R_PPC64_GOT_TLSLD16_HI:
3681 case R_PPC64_GOT_TLSLD16_HA:
3682 htab->tlsld_got.refcount += 1;
3683 tls_type = TLS_TLS | TLS_LD;
3684 goto dogottls;
3685
3686 case R_PPC64_GOT_TLSGD16:
3687 case R_PPC64_GOT_TLSGD16_LO:
3688 case R_PPC64_GOT_TLSGD16_HI:
3689 case R_PPC64_GOT_TLSGD16_HA:
3690 tls_type = TLS_TLS | TLS_GD;
3691 goto dogottls;
3692
3693 case R_PPC64_GOT_TPREL16_DS:
3694 case R_PPC64_GOT_TPREL16_LO_DS:
3695 case R_PPC64_GOT_TPREL16_HI:
3696 case R_PPC64_GOT_TPREL16_HA:
3697 if (info->shared)
3698 info->flags |= DF_STATIC_TLS;
3699 tls_type = TLS_TLS | TLS_TPREL;
3700 goto dogottls;
3701
3702 case R_PPC64_GOT_DTPREL16_DS:
3703 case R_PPC64_GOT_DTPREL16_LO_DS:
3704 case R_PPC64_GOT_DTPREL16_HI:
3705 case R_PPC64_GOT_DTPREL16_HA:
3706 tls_type = TLS_TLS | TLS_DTPREL;
3707 dogottls:
3708 sec->has_tls_reloc = 1;
3709 /* Fall thru */
3710
3711 case R_PPC64_GOT16:
3712 case R_PPC64_GOT16_DS:
3713 case R_PPC64_GOT16_HA:
3714 case R_PPC64_GOT16_HI:
3715 case R_PPC64_GOT16_LO:
3716 case R_PPC64_GOT16_LO_DS:
3717 /* This symbol requires a global offset table entry. */
3718 sec->has_gp_reloc = 1;
3719 if (htab->sgot == NULL
3720 && !create_got_section (htab->elf.dynobj, info))
3721 return FALSE;
3722
3723 if (h != NULL)
3724 {
3725 struct ppc_link_hash_entry *eh;
3726 struct got_entry *ent;
3727
3728 eh = (struct ppc_link_hash_entry *) h;
3729 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3730 if (ent->addend == rel->r_addend
3731 && ent->tls_type == tls_type)
3732 break;
3733 if (ent == NULL)
3734 {
3735 bfd_size_type amt = sizeof (*ent);
3736 ent = (struct got_entry *) bfd_alloc (abfd, amt);
3737 if (ent == NULL)
3738 return FALSE;
3739 ent->next = eh->elf.got.glist;
3740 ent->addend = rel->r_addend;
3741 ent->tls_type = tls_type;
3742 ent->got.refcount = 0;
3743 eh->elf.got.glist = ent;
3744 }
3745 ent->got.refcount += 1;
3746 eh->tls_mask |= tls_type;
3747 }
3748 else
3749 /* This is a global offset table entry for a local symbol. */
3750 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3751 rel->r_addend, tls_type))
3752 return FALSE;
3753 break;
3754
3755 case R_PPC64_PLT16_HA:
3756 case R_PPC64_PLT16_HI:
3757 case R_PPC64_PLT16_LO:
3758 case R_PPC64_PLT32:
3759 case R_PPC64_PLT64:
3760 /* This symbol requires a procedure linkage table entry. We
3761 actually build the entry in adjust_dynamic_symbol,
3762 because this might be a case of linking PIC code without
3763 linking in any dynamic objects, in which case we don't
3764 need to generate a procedure linkage table after all. */
3765 if (h == NULL)
3766 {
3767 /* It does not make sense to have a procedure linkage
3768 table entry for a local symbol. */
3769 bfd_set_error (bfd_error_bad_value);
3770 return FALSE;
3771 }
3772 else
3773 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3774 rel->r_addend))
3775 return FALSE;
3776 break;
3777
3778 /* The following relocations don't need to propagate the
3779 relocation if linking a shared object since they are
3780 section relative. */
3781 case R_PPC64_SECTOFF:
3782 case R_PPC64_SECTOFF_LO:
3783 case R_PPC64_SECTOFF_HI:
3784 case R_PPC64_SECTOFF_HA:
3785 case R_PPC64_SECTOFF_DS:
3786 case R_PPC64_SECTOFF_LO_DS:
3787 case R_PPC64_DTPREL16:
3788 case R_PPC64_DTPREL16_LO:
3789 case R_PPC64_DTPREL16_HI:
3790 case R_PPC64_DTPREL16_HA:
3791 case R_PPC64_DTPREL16_DS:
3792 case R_PPC64_DTPREL16_LO_DS:
3793 case R_PPC64_DTPREL16_HIGHER:
3794 case R_PPC64_DTPREL16_HIGHERA:
3795 case R_PPC64_DTPREL16_HIGHEST:
3796 case R_PPC64_DTPREL16_HIGHESTA:
3797 break;
3798
3799 /* Nor do these. */
3800 case R_PPC64_TOC16:
3801 case R_PPC64_TOC16_LO:
3802 case R_PPC64_TOC16_HI:
3803 case R_PPC64_TOC16_HA:
3804 case R_PPC64_TOC16_DS:
3805 case R_PPC64_TOC16_LO_DS:
3806 sec->has_gp_reloc = 1;
3807 break;
3808
3809 /* This relocation describes the C++ object vtable hierarchy.
3810 Reconstruct it for later use during GC. */
3811 case R_PPC64_GNU_VTINHERIT:
3812 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3813 return FALSE;
3814 break;
3815
3816 /* This relocation describes which C++ vtable entries are actually
3817 used. Record for later use during GC. */
3818 case R_PPC64_GNU_VTENTRY:
3819 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3820 return FALSE;
3821 break;
3822
3823 case R_PPC64_REL14:
3824 case R_PPC64_REL14_BRTAKEN:
3825 case R_PPC64_REL14_BRNTAKEN:
3826 htab->has_14bit_branch = 1;
3827 /* Fall through. */
3828
3829 case R_PPC64_REL24:
3830 if (h != NULL
3831 && h->root.root.string[0] == '.'
3832 && h->root.root.string[1] != 0)
3833 {
3834 /* We may need a .plt entry if the function this reloc
3835 refers to is in a shared lib. */
3836 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3837 rel->r_addend))
3838 return FALSE;
3839 if (h == htab->tls_get_addr)
3840 sec->has_tls_reloc = 1;
3841 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3842 == 0)
3843 && (h->root.root.string[15] == 0
3844 || h->root.root.string[15] == '@'))
3845 {
3846 htab->tls_get_addr = h;
3847 sec->has_tls_reloc = 1;
3848 }
3849 }
3850 break;
3851
3852 case R_PPC64_TPREL64:
3853 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3854 if (info->shared)
3855 info->flags |= DF_STATIC_TLS;
3856 goto dotlstoc;
3857
3858 case R_PPC64_DTPMOD64:
3859 if (rel + 1 < rel_end
3860 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3861 && rel[1].r_offset == rel->r_offset + 8)
3862 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3863 else
3864 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3865 goto dotlstoc;
3866
3867 case R_PPC64_DTPREL64:
3868 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3869 if (rel != relocs
3870 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3871 && rel[-1].r_offset == rel->r_offset - 8)
3872 /* This is the second reloc of a dtpmod, dtprel pair.
3873 Don't mark with TLS_DTPREL. */
3874 goto dodyn;
3875
3876 dotlstoc:
3877 sec->has_tls_reloc = 1;
3878 if (h != NULL)
3879 {
3880 struct ppc_link_hash_entry *eh;
3881 eh = (struct ppc_link_hash_entry *) h;
3882 eh->tls_mask |= tls_type;
3883 }
3884 else
3885 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3886 rel->r_addend, tls_type))
3887 return FALSE;
3888
3889 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3890 {
3891 /* One extra to simplify get_tls_mask. */
3892 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3893 ppc64_elf_section_data (sec)->t_symndx
3894 = (unsigned *) bfd_zalloc (abfd, amt);
3895 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3896 return FALSE;
3897 }
3898 BFD_ASSERT (rel->r_offset % 8 == 0);
3899 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3900
3901 /* Mark the second slot of a GD or LD entry.
3902 -1 to indicate GD and -2 to indicate LD. */
3903 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3904 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3905 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3906 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3907 goto dodyn;
3908
3909 case R_PPC64_TPREL16:
3910 case R_PPC64_TPREL16_LO:
3911 case R_PPC64_TPREL16_HI:
3912 case R_PPC64_TPREL16_HA:
3913 case R_PPC64_TPREL16_DS:
3914 case R_PPC64_TPREL16_LO_DS:
3915 case R_PPC64_TPREL16_HIGHER:
3916 case R_PPC64_TPREL16_HIGHERA:
3917 case R_PPC64_TPREL16_HIGHEST:
3918 case R_PPC64_TPREL16_HIGHESTA:
3919 if (info->shared)
3920 {
3921 info->flags |= DF_STATIC_TLS;
3922 goto dodyn;
3923 }
3924 break;
3925
3926 case R_PPC64_ADDR64:
3927 if (opd_sym_map != NULL
3928 && h != NULL
3929 && h->root.root.string[0] == '.'
3930 && h->root.root.string[1] != 0)
3931 {
3932 struct elf_link_hash_entry *fdh;
3933
3934 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
3935 FALSE, FALSE, FALSE);
3936 if (fdh != NULL)
3937 {
3938 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
3939 ((struct ppc_link_hash_entry *) fdh)->oh = h;
3940 ((struct ppc_link_hash_entry *) h)->is_func = 1;
3941 ((struct ppc_link_hash_entry *) h)->oh = fdh;
3942 }
3943 }
3944 if (opd_sym_map != NULL
3945 && h == NULL
3946 && rel + 1 < rel_end
3947 && ((enum elf_ppc64_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info)
3948 == R_PPC64_TOC))
3949 {
3950 asection *s;
3951
3952 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3953 r_symndx);
3954 if (s == NULL)
3955 return FALSE;
3956 else if (s != sec)
3957 opd_sym_map[rel->r_offset / 24] = s;
3958 }
3959 /* Fall through. */
3960
3961 case R_PPC64_REL30:
3962 case R_PPC64_REL32:
3963 case R_PPC64_REL64:
3964 case R_PPC64_ADDR14:
3965 case R_PPC64_ADDR14_BRNTAKEN:
3966 case R_PPC64_ADDR14_BRTAKEN:
3967 case R_PPC64_ADDR16:
3968 case R_PPC64_ADDR16_DS:
3969 case R_PPC64_ADDR16_HA:
3970 case R_PPC64_ADDR16_HI:
3971 case R_PPC64_ADDR16_HIGHER:
3972 case R_PPC64_ADDR16_HIGHERA:
3973 case R_PPC64_ADDR16_HIGHEST:
3974 case R_PPC64_ADDR16_HIGHESTA:
3975 case R_PPC64_ADDR16_LO:
3976 case R_PPC64_ADDR16_LO_DS:
3977 case R_PPC64_ADDR24:
3978 case R_PPC64_ADDR32:
3979 case R_PPC64_UADDR16:
3980 case R_PPC64_UADDR32:
3981 case R_PPC64_UADDR64:
3982 case R_PPC64_TOC:
3983 if (h != NULL && !info->shared)
3984 /* We may need a copy reloc. */
3985 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3986
3987 /* Don't propagate .opd relocs. */
3988 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3989 break;
3990
3991 /* Don't propagate relocs that the dynamic linker won't relocate. */
3992 if ((sec->flags & SEC_ALLOC) == 0)
3993 break;
3994
3995 /* If we are creating a shared library, and this is a reloc
3996 against a global symbol, or a non PC relative reloc
3997 against a local symbol, then we need to copy the reloc
3998 into the shared library. However, if we are linking with
3999 -Bsymbolic, we do not need to copy a reloc against a
4000 global symbol which is defined in an object we are
4001 including in the link (i.e., DEF_REGULAR is set). At
4002 this point we have not seen all the input files, so it is
4003 possible that DEF_REGULAR is not set now but will be set
4004 later (it is never cleared). In case of a weak definition,
4005 DEF_REGULAR may be cleared later by a strong definition in
4006 a shared library. We account for that possibility below by
4007 storing information in the dyn_relocs field of the hash
4008 table entry. A similar situation occurs when creating
4009 shared libraries and symbol visibility changes render the
4010 symbol local.
4011
4012 If on the other hand, we are creating an executable, we
4013 may need to keep relocations for symbols satisfied by a
4014 dynamic library if we manage to avoid copy relocs for the
4015 symbol. */
4016 dodyn:
4017 if ((info->shared
4018 && (MUST_BE_DYN_RELOC (r_type)
4019 || (h != NULL
4020 && (! info->symbolic
4021 || h->root.type == bfd_link_hash_defweak
4022 || (h->elf_link_hash_flags
4023 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
4024 || (ELIMINATE_COPY_RELOCS
4025 && !info->shared
4026 && h != NULL
4027 && (h->root.type == bfd_link_hash_defweak
4028 || (h->elf_link_hash_flags
4029 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
4030 {
4031 struct ppc_dyn_relocs *p;
4032 struct ppc_dyn_relocs **head;
4033
4034 /* We must copy these reloc types into the output file.
4035 Create a reloc section in dynobj and make room for
4036 this reloc. */
4037 if (sreloc == NULL)
4038 {
4039 const char *name;
4040 bfd *dynobj;
4041
4042 name = (bfd_elf_string_from_elf_section
4043 (abfd,
4044 elf_elfheader (abfd)->e_shstrndx,
4045 elf_section_data (sec)->rel_hdr.sh_name));
4046 if (name == NULL)
4047 return FALSE;
4048
4049 if (strncmp (name, ".rela", 5) != 0
4050 || strcmp (bfd_get_section_name (abfd, sec),
4051 name + 5) != 0)
4052 {
4053 (*_bfd_error_handler)
4054 (_("%s: bad relocation section name `%s\'"),
4055 bfd_archive_filename (abfd), name);
4056 bfd_set_error (bfd_error_bad_value);
4057 }
4058
4059 dynobj = htab->elf.dynobj;
4060 sreloc = bfd_get_section_by_name (dynobj, name);
4061 if (sreloc == NULL)
4062 {
4063 flagword flags;
4064
4065 sreloc = bfd_make_section (dynobj, name);
4066 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4067 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4068 if ((sec->flags & SEC_ALLOC) != 0)
4069 flags |= SEC_ALLOC | SEC_LOAD;
4070 if (sreloc == NULL
4071 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4072 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4073 return FALSE;
4074 }
4075 elf_section_data (sec)->sreloc = sreloc;
4076 }
4077
4078 /* If this is a global symbol, we count the number of
4079 relocations we need for this symbol. */
4080 if (h != NULL)
4081 {
4082 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4083 }
4084 else
4085 {
4086 /* Track dynamic relocs needed for local syms too.
4087 We really need local syms available to do this
4088 easily. Oh well. */
4089
4090 asection *s;
4091 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4092 sec, r_symndx);
4093 if (s == NULL)
4094 return FALSE;
4095
4096 head = ((struct ppc_dyn_relocs **)
4097 &elf_section_data (s)->local_dynrel);
4098 }
4099
4100 p = *head;
4101 if (p == NULL || p->sec != sec)
4102 {
4103 p = ((struct ppc_dyn_relocs *)
4104 bfd_alloc (htab->elf.dynobj,
4105 (bfd_size_type) sizeof *p));
4106 if (p == NULL)
4107 return FALSE;
4108 p->next = *head;
4109 *head = p;
4110 p->sec = sec;
4111 p->count = 0;
4112 p->pc_count = 0;
4113 }
4114
4115 p->count += 1;
4116 if (!MUST_BE_DYN_RELOC (r_type))
4117 p->pc_count += 1;
4118 }
4119 break;
4120
4121 default:
4122 break;
4123 }
4124 }
4125
4126 return TRUE;
4127 }
4128
4129 /* Return the section that should be marked against GC for a given
4130 relocation. */
4131
4132 static asection *
4133 ppc64_elf_gc_mark_hook (sec, info, rel, h, sym)
4134 asection *sec;
4135 struct bfd_link_info *info ATTRIBUTE_UNUSED;
4136 Elf_Internal_Rela *rel;
4137 struct elf_link_hash_entry *h;
4138 Elf_Internal_Sym *sym;
4139 {
4140 asection *rsec = NULL;
4141
4142 if (h != NULL)
4143 {
4144 enum elf_ppc64_reloc_type r_type;
4145 struct ppc_link_hash_entry *fdh;
4146
4147 r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
4148 switch (r_type)
4149 {
4150 case R_PPC64_GNU_VTINHERIT:
4151 case R_PPC64_GNU_VTENTRY:
4152 break;
4153
4154 default:
4155 switch (h->root.type)
4156 {
4157 case bfd_link_hash_defined:
4158 case bfd_link_hash_defweak:
4159 fdh = (struct ppc_link_hash_entry *) h;
4160
4161 /* Function descriptor syms cause the associated
4162 function code sym section to be marked. */
4163 if (fdh->is_func_descriptor)
4164 rsec = fdh->oh->root.u.def.section;
4165
4166 /* Function entry syms return NULL if they are in .opd
4167 and are not ._start (or others undefined on the ld
4168 command line). Thus we avoid marking all function
4169 sections, as all functions are referenced in .opd. */
4170 else if ((fdh->oh != NULL
4171 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4172 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4173 rsec = h->root.u.def.section;
4174 break;
4175
4176 case bfd_link_hash_common:
4177 rsec = h->root.u.c.p->section;
4178 break;
4179
4180 default:
4181 break;
4182 }
4183 }
4184 }
4185 else
4186 {
4187 asection **opd_sym_section;
4188
4189 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4190 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4191 if (opd_sym_section != NULL)
4192 rsec = opd_sym_section[sym->st_value / 24];
4193 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4194 rsec = NULL;
4195 }
4196
4197 return rsec;
4198 }
4199
4200 /* Update the .got, .plt. and dynamic reloc reference counts for the
4201 section being removed. */
4202
4203 static bfd_boolean
4204 ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
4205 bfd *abfd;
4206 struct bfd_link_info *info;
4207 asection *sec;
4208 const Elf_Internal_Rela *relocs;
4209 {
4210 struct ppc_link_hash_table *htab;
4211 Elf_Internal_Shdr *symtab_hdr;
4212 struct elf_link_hash_entry **sym_hashes;
4213 struct got_entry **local_got_ents;
4214 const Elf_Internal_Rela *rel, *relend;
4215
4216 elf_section_data (sec)->local_dynrel = NULL;
4217
4218 htab = ppc_hash_table (info);
4219 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4220 sym_hashes = elf_sym_hashes (abfd);
4221 local_got_ents = elf_local_got_ents (abfd);
4222
4223 relend = relocs + sec->reloc_count;
4224 for (rel = relocs; rel < relend; rel++)
4225 {
4226 unsigned long r_symndx;
4227 enum elf_ppc64_reloc_type r_type;
4228 struct elf_link_hash_entry *h = NULL;
4229 char tls_type = 0;
4230
4231 r_symndx = ELF64_R_SYM (rel->r_info);
4232 r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
4233 if (r_symndx >= symtab_hdr->sh_info)
4234 {
4235 struct ppc_link_hash_entry *eh;
4236 struct ppc_dyn_relocs **pp;
4237 struct ppc_dyn_relocs *p;
4238
4239 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4240 eh = (struct ppc_link_hash_entry *) h;
4241
4242 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4243 if (p->sec == sec)
4244 {
4245 /* Everything must go for SEC. */
4246 *pp = p->next;
4247 break;
4248 }
4249 }
4250
4251 switch (r_type)
4252 {
4253 case R_PPC64_GOT_TLSLD16:
4254 case R_PPC64_GOT_TLSLD16_LO:
4255 case R_PPC64_GOT_TLSLD16_HI:
4256 case R_PPC64_GOT_TLSLD16_HA:
4257 htab->tlsld_got.refcount -= 1;
4258 tls_type = TLS_TLS | TLS_LD;
4259 goto dogot;
4260
4261 case R_PPC64_GOT_TLSGD16:
4262 case R_PPC64_GOT_TLSGD16_LO:
4263 case R_PPC64_GOT_TLSGD16_HI:
4264 case R_PPC64_GOT_TLSGD16_HA:
4265 tls_type = TLS_TLS | TLS_GD;
4266 goto dogot;
4267
4268 case R_PPC64_GOT_TPREL16_DS:
4269 case R_PPC64_GOT_TPREL16_LO_DS:
4270 case R_PPC64_GOT_TPREL16_HI:
4271 case R_PPC64_GOT_TPREL16_HA:
4272 tls_type = TLS_TLS | TLS_TPREL;
4273 goto dogot;
4274
4275 case R_PPC64_GOT_DTPREL16_DS:
4276 case R_PPC64_GOT_DTPREL16_LO_DS:
4277 case R_PPC64_GOT_DTPREL16_HI:
4278 case R_PPC64_GOT_DTPREL16_HA:
4279 tls_type = TLS_TLS | TLS_DTPREL;
4280 goto dogot;
4281
4282 case R_PPC64_GOT16:
4283 case R_PPC64_GOT16_DS:
4284 case R_PPC64_GOT16_HA:
4285 case R_PPC64_GOT16_HI:
4286 case R_PPC64_GOT16_LO:
4287 case R_PPC64_GOT16_LO_DS:
4288 dogot:
4289 {
4290 struct got_entry *ent;
4291
4292 if (h != NULL)
4293 ent = h->got.glist;
4294 else
4295 ent = local_got_ents[r_symndx];
4296
4297 for (; ent != NULL; ent = ent->next)
4298 if (ent->addend == rel->r_addend
4299 && ent->tls_type == tls_type)
4300 break;
4301 if (ent == NULL)
4302 abort ();
4303 if (ent->got.refcount > 0)
4304 ent->got.refcount -= 1;
4305 }
4306 break;
4307
4308 case R_PPC64_PLT16_HA:
4309 case R_PPC64_PLT16_HI:
4310 case R_PPC64_PLT16_LO:
4311 case R_PPC64_PLT32:
4312 case R_PPC64_PLT64:
4313 case R_PPC64_REL14:
4314 case R_PPC64_REL14_BRNTAKEN:
4315 case R_PPC64_REL14_BRTAKEN:
4316 case R_PPC64_REL24:
4317 if (h != NULL)
4318 {
4319 struct plt_entry *ent;
4320
4321 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4322 if (ent->addend == rel->r_addend)
4323 break;
4324 if (ent == NULL)
4325 abort ();
4326 if (ent->plt.refcount > 0)
4327 ent->plt.refcount -= 1;
4328 }
4329 break;
4330
4331 default:
4332 break;
4333 }
4334 }
4335 return TRUE;
4336 }
4337
4338 /* Called via elf_link_hash_traverse to transfer dynamic linking
4339 information on function code symbol entries to their corresponding
4340 function descriptor symbol entries. */
4341 static bfd_boolean
4342 func_desc_adjust (h, inf)
4343 struct elf_link_hash_entry *h;
4344 PTR inf;
4345 {
4346 struct bfd_link_info *info;
4347 struct ppc_link_hash_table *htab;
4348 struct plt_entry *ent;
4349
4350 if (h->root.type == bfd_link_hash_indirect)
4351 return TRUE;
4352
4353 if (h->root.type == bfd_link_hash_warning)
4354 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4355
4356 info = (struct bfd_link_info *) inf;
4357 htab = ppc_hash_table (info);
4358
4359 /* If this is a function code symbol, transfer dynamic linking
4360 information to the function descriptor symbol. */
4361 if (!((struct ppc_link_hash_entry *) h)->is_func)
4362 return TRUE;
4363
4364 if (h->root.type == bfd_link_hash_undefweak
4365 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4366 htab->have_undefweak = TRUE;
4367
4368 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4369 if (ent->plt.refcount > 0)
4370 break;
4371 if (ent != NULL
4372 && h->root.root.string[0] == '.'
4373 && h->root.root.string[1] != '\0')
4374 {
4375 struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh;
4376 bfd_boolean force_local;
4377
4378 /* Find the corresponding function descriptor symbol. Create it
4379 as undefined if necessary. */
4380
4381 if (fdh == NULL)
4382 fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
4383 FALSE, FALSE, TRUE);
4384
4385 if (fdh == NULL
4386 && info->shared
4387 && (h->root.type == bfd_link_hash_undefined
4388 || h->root.type == bfd_link_hash_undefweak))
4389 {
4390 bfd *abfd;
4391 asymbol *newsym;
4392 struct bfd_link_hash_entry *bh;
4393
4394 abfd = h->root.u.undef.abfd;
4395 newsym = bfd_make_empty_symbol (abfd);
4396 newsym->name = h->root.root.string + 1;
4397 newsym->section = bfd_und_section_ptr;
4398 newsym->value = 0;
4399 newsym->flags = BSF_OBJECT;
4400 if (h->root.type == bfd_link_hash_undefweak)
4401 newsym->flags |= BSF_WEAK;
4402
4403 bh = &fdh->root;
4404 if ( !(_bfd_generic_link_add_one_symbol
4405 (info, abfd, newsym->name, newsym->flags,
4406 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4407 {
4408 return FALSE;
4409 }
4410 fdh = (struct elf_link_hash_entry *) bh;
4411 fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4412 }
4413
4414 if (fdh != NULL
4415 && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4416 && (info->shared
4417 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4418 || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
4419 {
4420 if (fdh->dynindx == -1)
4421 if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
4422 return FALSE;
4423 fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
4424 & (ELF_LINK_HASH_REF_REGULAR
4425 | ELF_LINK_HASH_REF_DYNAMIC
4426 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4427 | ELF_LINK_NON_GOT_REF));
4428 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
4429 {
4430 fdh->plt.plist = h->plt.plist;
4431 fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4432 }
4433 ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
4434 ((struct ppc_link_hash_entry *) fdh)->oh = h;
4435 ((struct ppc_link_hash_entry *) h)->oh = fdh;
4436 }
4437
4438 /* Now that the info is on the function descriptor, clear the
4439 function code sym info. Any function code syms for which we
4440 don't have a definition in a regular file, we force local.
4441 This prevents a shared library from exporting syms that have
4442 been imported from another library. Function code syms that
4443 are really in the library we must leave global to prevent the
4444 linker dragging in a definition from a static library. */
4445 force_local = (info->shared
4446 && ((h->elf_link_hash_flags
4447 & ELF_LINK_HASH_DEF_REGULAR) == 0
4448 || fdh == NULL
4449 || (fdh->elf_link_hash_flags
4450 & ELF_LINK_HASH_DEF_REGULAR) == 0
4451 || (fdh->elf_link_hash_flags
4452 & ELF_LINK_FORCED_LOCAL) != 0));
4453 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4454 }
4455
4456 return TRUE;
4457 }
4458
4459 #define MIN_SAVE_FPR 14
4460 #define MAX_SAVE_FPR 31
4461
4462 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4463 this hook to a) provide some gcc support functions, and b) transfer
4464 dynamic linking information gathered so far on function code symbol
4465 entries, to their corresponding function descriptor symbol entries. */
4466 static bfd_boolean
4467 ppc64_elf_func_desc_adjust (obfd, info)
4468 bfd *obfd ATTRIBUTE_UNUSED;
4469 struct bfd_link_info *info;
4470 {
4471 struct ppc_link_hash_table *htab;
4472 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4473 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4474 unsigned int i;
4475 struct elf_link_hash_entry *h;
4476 bfd_byte *p;
4477 char sym[10];
4478
4479 htab = ppc_hash_table (info);
4480
4481 if (htab->sfpr == NULL)
4482 /* We don't have any relocs. */
4483 return TRUE;
4484
4485 /* First provide any missing ._savef* and ._restf* functions. */
4486 memcpy (sym, "._savef14", 10);
4487 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4488 {
4489 sym[7] = i / 10 + '0';
4490 sym[8] = i % 10 + '0';
4491 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4492 if (h != NULL
4493 && h->root.type == bfd_link_hash_undefined)
4494 {
4495 if (lowest_savef > i)
4496 lowest_savef = i;
4497 h->root.type = bfd_link_hash_defined;
4498 h->root.u.def.section = htab->sfpr;
4499 h->root.u.def.value = (i - lowest_savef) * 4;
4500 h->type = STT_FUNC;
4501 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4502 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
4503 }
4504 }
4505
4506 memcpy (sym, "._restf14", 10);
4507 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4508 {
4509 sym[7] = i / 10 + '0';
4510 sym[8] = i % 10 + '0';
4511 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4512 if (h != NULL
4513 && h->root.type == bfd_link_hash_undefined)
4514 {
4515 if (lowest_restf > i)
4516 lowest_restf = i;
4517 h->root.type = bfd_link_hash_defined;
4518 h->root.u.def.section = htab->sfpr;
4519 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4520 + (i - lowest_restf) * 4);
4521 h->type = STT_FUNC;
4522 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4523 _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
4524 }
4525 }
4526
4527 elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
4528
4529 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4530 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4531
4532 if (htab->sfpr->_raw_size == 0)
4533 {
4534 if (!htab->have_undefweak)
4535 {
4536 _bfd_strip_section_from_output (info, htab->sfpr);
4537 return TRUE;
4538 }
4539
4540 htab->sfpr->_raw_size = 4;
4541 }
4542
4543 p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
4544 if (p == NULL)
4545 return FALSE;
4546 htab->sfpr->contents = p;
4547
4548 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4549 {
4550 unsigned int fpr = i << 21;
4551 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4552 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4553 p += 4;
4554 }
4555 if (lowest_savef <= MAX_SAVE_FPR)
4556 {
4557 bfd_put_32 (htab->elf.dynobj, BLR, p);
4558 p += 4;
4559 }
4560
4561 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4562 {
4563 unsigned int fpr = i << 21;
4564 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4565 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4566 p += 4;
4567 }
4568 if (lowest_restf <= MAX_SAVE_FPR
4569 || htab->sfpr->_raw_size == 4)
4570 {
4571 bfd_put_32 (htab->elf.dynobj, BLR, p);
4572 }
4573
4574 return TRUE;
4575 }
4576
4577 /* Adjust a symbol defined by a dynamic object and referenced by a
4578 regular object. The current definition is in some section of the
4579 dynamic object, but we're not including those sections. We have to
4580 change the definition to something the rest of the link can
4581 understand. */
4582
4583 static bfd_boolean
4584 ppc64_elf_adjust_dynamic_symbol (info, h)
4585 struct bfd_link_info *info;
4586 struct elf_link_hash_entry *h;
4587 {
4588 struct ppc_link_hash_table *htab;
4589 asection *s;
4590 unsigned int power_of_two;
4591
4592 htab = ppc_hash_table (info);
4593
4594 /* Deal with function syms. */
4595 if (h->type == STT_FUNC
4596 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4597 {
4598 /* Clear procedure linkage table information for any symbol that
4599 won't need a .plt entry. */
4600 struct plt_entry *ent;
4601 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4602 if (ent->plt.refcount > 0)
4603 break;
4604 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4605 || ent == NULL
4606 || SYMBOL_CALLS_LOCAL (info, h)
4607 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4608 && h->root.type == bfd_link_hash_undefweak))
4609 {
4610 h->plt.plist = NULL;
4611 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4612 }
4613 }
4614 else
4615 h->plt.plist = NULL;
4616
4617 /* If this is a weak symbol, and there is a real definition, the
4618 processor independent code will have arranged for us to see the
4619 real definition first, and we can just use the same value. */
4620 if (h->weakdef != NULL)
4621 {
4622 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4623 || h->weakdef->root.type == bfd_link_hash_defweak);
4624 h->root.u.def.section = h->weakdef->root.u.def.section;
4625 h->root.u.def.value = h->weakdef->root.u.def.value;
4626 if (ELIMINATE_COPY_RELOCS)
4627 h->elf_link_hash_flags
4628 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4629 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4630 return TRUE;
4631 }
4632
4633 /* This is a reference to a symbol defined by a dynamic object which
4634 is not a function. */
4635
4636 /* If we are creating a shared library, we must presume that the
4637 only references to the symbol are via the global offset table.
4638 For such cases we need not do anything here; the relocations will
4639 be handled correctly by relocate_section. */
4640 if (info->shared)
4641 return TRUE;
4642
4643 /* If there are no references to this symbol that do not use the
4644 GOT, we don't need to generate a copy reloc. */
4645 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4646 return TRUE;
4647
4648 if (ELIMINATE_COPY_RELOCS)
4649 {
4650 struct ppc_link_hash_entry * eh;
4651 struct ppc_dyn_relocs *p;
4652
4653 eh = (struct ppc_link_hash_entry *) h;
4654 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4655 {
4656 s = p->sec->output_section;
4657 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4658 break;
4659 }
4660
4661 /* If we didn't find any dynamic relocs in read-only sections, then
4662 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4663 if (p == NULL)
4664 {
4665 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4666 return TRUE;
4667 }
4668 }
4669
4670 /* We must allocate the symbol in our .dynbss section, which will
4671 become part of the .bss section of the executable. There will be
4672 an entry for this symbol in the .dynsym section. The dynamic
4673 object will contain position independent code, so all references
4674 from the dynamic object to this symbol will go through the global
4675 offset table. The dynamic linker will use the .dynsym entry to
4676 determine the address it must put in the global offset table, so
4677 both the dynamic object and the regular object will refer to the
4678 same memory location for the variable. */
4679
4680 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4681 to copy the initial value out of the dynamic object and into the
4682 runtime process image. We need to remember the offset into the
4683 .rela.bss section we are going to use. */
4684 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4685 {
4686 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
4687 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4688 }
4689
4690 /* We need to figure out the alignment required for this symbol. I
4691 have no idea how ELF linkers handle this. */
4692 power_of_two = bfd_log2 (h->size);
4693 if (power_of_two > 4)
4694 power_of_two = 4;
4695
4696 /* Apply the required alignment. */
4697 s = htab->sdynbss;
4698 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4699 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4700 {
4701 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4702 return FALSE;
4703 }
4704
4705 /* Define the symbol as being at this point in the section. */
4706 h->root.u.def.section = s;
4707 h->root.u.def.value = s->_raw_size;
4708
4709 /* Increment the section size to make room for the symbol. */
4710 s->_raw_size += h->size;
4711
4712 return TRUE;
4713 }
4714
4715 /* If given a function descriptor symbol, hide both the function code
4716 sym and the descriptor. */
4717 static void
4718 ppc64_elf_hide_symbol (info, h, force_local)
4719 struct bfd_link_info *info;
4720 struct elf_link_hash_entry *h;
4721 bfd_boolean force_local;
4722 {
4723 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4724
4725 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4726 {
4727 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4728
4729 if (fh == NULL)
4730 {
4731 const char *p, *q;
4732 struct ppc_link_hash_table *htab;
4733 char save;
4734
4735 /* We aren't supposed to use alloca in BFD because on
4736 systems which do not have alloca the version in libiberty
4737 calls xmalloc, which might cause the program to crash
4738 when it runs out of memory. This function doesn't have a
4739 return status, so there's no way to gracefully return an
4740 error. So cheat. We know that string[-1] can be safely
4741 dereferenced; It's either a string in an ELF string
4742 table, or allocated in an objalloc structure. */
4743
4744 p = h->root.root.string - 1;
4745 save = *p;
4746 *(char *) p = '.';
4747 htab = ppc_hash_table (info);
4748 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4749 *(char *) p = save;
4750
4751 /* Unfortunately, if it so happens that the string we were
4752 looking for was allocated immediately before this string,
4753 then we overwrote the string terminator. That's the only
4754 reason the lookup should fail. */
4755 if (fh == NULL)
4756 {
4757 q = h->root.root.string + strlen (h->root.root.string);
4758 while (q >= h->root.root.string && *q == *p)
4759 --q, --p;
4760 if (q < h->root.root.string && *p == '.')
4761 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4762 }
4763 if (fh != NULL)
4764 {
4765 ((struct ppc_link_hash_entry *) h)->oh = fh;
4766 ((struct ppc_link_hash_entry *) fh)->oh = h;
4767 }
4768 }
4769 if (fh != NULL)
4770 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4771 }
4772 }
4773
4774 static bfd_boolean
4775 get_sym_h (hp, symp, symsecp, tls_maskp, locsymsp, r_symndx, ibfd)
4776 struct elf_link_hash_entry **hp;
4777 Elf_Internal_Sym **symp;
4778 asection **symsecp;
4779 char **tls_maskp;
4780 Elf_Internal_Sym **locsymsp;
4781 unsigned long r_symndx;
4782 bfd *ibfd;
4783 {
4784 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4785
4786 if (r_symndx >= symtab_hdr->sh_info)
4787 {
4788 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4789 struct elf_link_hash_entry *h;
4790
4791 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4792 while (h->root.type == bfd_link_hash_indirect
4793 || h->root.type == bfd_link_hash_warning)
4794 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4795
4796 if (hp != NULL)
4797 *hp = h;
4798
4799 if (symp != NULL)
4800 *symp = NULL;
4801
4802 if (symsecp != NULL)
4803 {
4804 asection *symsec = NULL;
4805 if (h->root.type == bfd_link_hash_defined
4806 || h->root.type == bfd_link_hash_defweak)
4807 symsec = h->root.u.def.section;
4808 *symsecp = symsec;
4809 }
4810
4811 if (tls_maskp != NULL)
4812 {
4813 struct ppc_link_hash_entry *eh;
4814
4815 eh = (struct ppc_link_hash_entry *) h;
4816 *tls_maskp = &eh->tls_mask;
4817 }
4818 }
4819 else
4820 {
4821 Elf_Internal_Sym *sym;
4822 Elf_Internal_Sym *locsyms = *locsymsp;
4823
4824 if (locsyms == NULL)
4825 {
4826 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4827 if (locsyms == NULL)
4828 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4829 symtab_hdr->sh_info,
4830 0, NULL, NULL, NULL);
4831 if (locsyms == NULL)
4832 return FALSE;
4833 *locsymsp = locsyms;
4834 }
4835 sym = locsyms + r_symndx;
4836
4837 if (hp != NULL)
4838 *hp = NULL;
4839
4840 if (symp != NULL)
4841 *symp = sym;
4842
4843 if (symsecp != NULL)
4844 {
4845 asection *symsec = NULL;
4846 if ((sym->st_shndx != SHN_UNDEF
4847 && sym->st_shndx < SHN_LORESERVE)
4848 || sym->st_shndx > SHN_HIRESERVE)
4849 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4850 *symsecp = symsec;
4851 }
4852
4853 if (tls_maskp != NULL)
4854 {
4855 struct got_entry **lgot_ents;
4856 char *tls_mask;
4857
4858 tls_mask = NULL;
4859 lgot_ents = elf_local_got_ents (ibfd);
4860 if (lgot_ents != NULL)
4861 {
4862 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4863 tls_mask = &lgot_masks[r_symndx];
4864 }
4865 *tls_maskp = tls_mask;
4866 }
4867 }
4868 return TRUE;
4869 }
4870
4871 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4872 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4873 type suitable for optimization, and 1 otherwise. */
4874
4875 static int
4876 get_tls_mask (tls_maskp, locsymsp, rel, ibfd)
4877 char **tls_maskp;
4878 Elf_Internal_Sym **locsymsp;
4879 const Elf_Internal_Rela *rel;
4880 bfd *ibfd;
4881 {
4882 unsigned long r_symndx;
4883 unsigned int next_r;
4884 struct elf_link_hash_entry *h;
4885 Elf_Internal_Sym *sym;
4886 asection *sec;
4887 bfd_vma off;
4888
4889 r_symndx = ELF64_R_SYM (rel->r_info);
4890 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4891 return 0;
4892
4893 if ((*tls_maskp != NULL && **tls_maskp != 0)
4894 || sec == NULL
4895 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4896 return 1;
4897
4898 /* Look inside a TOC section too. */
4899 if (h != NULL)
4900 {
4901 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4902 off = h->root.u.def.value;
4903 }
4904 else
4905 off = sym->st_value;
4906 off += rel->r_addend;
4907 BFD_ASSERT (off % 8 == 0);
4908 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4909 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4910 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4911 return 0;
4912 if (h == NULL
4913 || h->root.type == bfd_link_hash_defined
4914 || h->root.type == bfd_link_hash_defweak)
4915 {
4916 if (next_r == (unsigned) -1)
4917 return 2;
4918 if (next_r == (unsigned) -2
4919 && (h == NULL
4920 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4921 return 3;
4922 }
4923 return 1;
4924 }
4925
4926 bfd_boolean
4927 ppc64_elf_edit_opd (obfd, info)
4928 bfd *obfd;
4929 struct bfd_link_info *info;
4930 {
4931 bfd *ibfd;
4932
4933 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4934 {
4935 asection *sec;
4936 Elf_Internal_Rela *relstart, *rel, *relend;
4937 Elf_Internal_Shdr *symtab_hdr;
4938 Elf_Internal_Sym *local_syms;
4939 struct elf_link_hash_entry **sym_hashes;
4940 bfd_vma offset;
4941 bfd_size_type amt;
4942 long *adjust;
4943 bfd_boolean need_edit;
4944
4945 sec = bfd_get_section_by_name (ibfd, ".opd");
4946 if (sec == NULL)
4947 continue;
4948
4949 amt = sec->_raw_size * sizeof (long) / 24;
4950 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4951 if (adjust == NULL)
4952 {
4953 /* Must be a ld -r link. ie. check_relocs hasn't been
4954 called. */
4955 adjust = (long *) bfd_zalloc (obfd, amt);
4956 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4957 }
4958 memset (adjust, 0, (size_t) amt);
4959
4960 if (sec->output_section == bfd_abs_section_ptr)
4961 continue;
4962
4963 /* Look through the section relocs. */
4964 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4965 continue;
4966
4967 local_syms = NULL;
4968 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4969 sym_hashes = elf_sym_hashes (ibfd);
4970
4971 /* Read the relocations. */
4972 relstart = _bfd_elf_link_read_relocs (ibfd, sec, (PTR) NULL,
4973 (Elf_Internal_Rela *) NULL,
4974 info->keep_memory);
4975 if (relstart == NULL)
4976 return FALSE;
4977
4978 /* First run through the relocs to check they are sane, and to
4979 determine whether we need to edit this opd section. */
4980 need_edit = FALSE;
4981 offset = 0;
4982 relend = relstart + sec->reloc_count;
4983 for (rel = relstart; rel < relend; rel++)
4984 {
4985 enum elf_ppc64_reloc_type r_type;
4986 unsigned long r_symndx;
4987 asection *sym_sec;
4988 struct elf_link_hash_entry *h;
4989 Elf_Internal_Sym *sym;
4990
4991 /* .opd contains a regular array of 24 byte entries. We're
4992 only interested in the reloc pointing to a function entry
4993 point. */
4994 r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
4995 if (r_type == R_PPC64_TOC)
4996 continue;
4997
4998 if (r_type != R_PPC64_ADDR64)
4999 {
5000 (*_bfd_error_handler)
5001 (_("%s: unexpected reloc type %u in .opd section"),
5002 bfd_archive_filename (ibfd), r_type);
5003 need_edit = FALSE;
5004 break;
5005 }
5006
5007 if (rel + 1 >= relend)
5008 continue;
5009 r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info);
5010 if (r_type != R_PPC64_TOC)
5011 continue;
5012
5013 if (rel->r_offset != offset)
5014 {
5015 /* If someone messes with .opd alignment then after a
5016 "ld -r" we might have padding in the middle of .opd.
5017 Also, there's nothing to prevent someone putting
5018 something silly in .opd with the assembler. No .opd
5019 optimization for them! */
5020 (*_bfd_error_handler)
5021 (_("%s: .opd is not a regular array of opd entries"),
5022 bfd_archive_filename (ibfd));
5023 need_edit = FALSE;
5024 break;
5025 }
5026
5027 r_symndx = ELF64_R_SYM (rel->r_info);
5028 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5029 r_symndx, ibfd))
5030 goto error_free_rel;
5031
5032 if (sym_sec == NULL || sym_sec->owner == NULL)
5033 {
5034 const char *sym_name;
5035 if (h != NULL)
5036 sym_name = h->root.root.string;
5037 else
5038 sym_name = bfd_elf_local_sym_name (ibfd, sym);
5039
5040 (*_bfd_error_handler)
5041 (_("%s: undefined sym `%s' in .opd section"),
5042 bfd_archive_filename (ibfd),
5043 sym_name);
5044 need_edit = FALSE;
5045 break;
5046 }
5047
5048 /* opd entries are always for functions defined in the
5049 current input bfd. If the symbol isn't defined in the
5050 input bfd, then we won't be using the function in this
5051 bfd; It must be defined in a linkonce section in another
5052 bfd, or is weak. It's also possible that we are
5053 discarding the function due to a linker script /DISCARD/,
5054 which we test for via the output_section. */
5055 if (sym_sec->owner != ibfd
5056 || sym_sec->output_section == bfd_abs_section_ptr)
5057 need_edit = TRUE;
5058
5059 offset += 24;
5060 }
5061
5062 if (need_edit)
5063 {
5064 Elf_Internal_Rela *write_rel;
5065 bfd_byte *rptr, *wptr;
5066 bfd_boolean skip;
5067
5068 /* This seems a waste of time as input .opd sections are all
5069 zeros as generated by gcc, but I suppose there's no reason
5070 this will always be so. We might start putting something in
5071 the third word of .opd entries. */
5072 if ((sec->flags & SEC_IN_MEMORY) == 0)
5073 {
5074 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
5075 if (loc == NULL
5076 || !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0,
5077 sec->_raw_size))
5078 {
5079 if (local_syms != NULL
5080 && symtab_hdr->contents != (unsigned char *) local_syms)
5081 free (local_syms);
5082 error_free_rel:
5083 if (elf_section_data (sec)->relocs != relstart)
5084 free (relstart);
5085 return FALSE;
5086 }
5087 sec->contents = loc;
5088 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5089 }
5090
5091 elf_section_data (sec)->relocs = relstart;
5092
5093 wptr = sec->contents;
5094 rptr = sec->contents;
5095 write_rel = relstart;
5096 skip = FALSE;
5097 offset = 0;
5098 for (rel = relstart; rel < relend; rel++)
5099 {
5100 if (rel->r_offset == offset)
5101 {
5102 unsigned long r_symndx;
5103 asection *sym_sec;
5104 struct elf_link_hash_entry *h;
5105 Elf_Internal_Sym *sym;
5106
5107 r_symndx = ELF64_R_SYM (rel->r_info);
5108 get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5109 r_symndx, ibfd);
5110
5111 skip = (sym_sec->owner != ibfd
5112 || sym_sec->output_section == bfd_abs_section_ptr);
5113 if (skip)
5114 {
5115 if (h != NULL && sym_sec->owner == ibfd)
5116 {
5117 /* Arrange for the function descriptor sym
5118 to be dropped. */
5119 struct ppc_link_hash_entry *fdh;
5120 struct ppc_link_hash_entry *fh;
5121
5122 fh = (struct ppc_link_hash_entry *) h;
5123 fdh = (struct ppc_link_hash_entry *) fh->oh;
5124 if (fdh == NULL)
5125 {
5126 const char *fd_name;
5127 struct ppc_link_hash_table *htab;
5128
5129 fd_name = h->root.root.string + 1;
5130 htab = ppc_hash_table (info);
5131 fdh = (struct ppc_link_hash_entry *)
5132 elf_link_hash_lookup (&htab->elf, fd_name,
5133 FALSE, FALSE, FALSE);
5134 fdh->is_func_descriptor = 1;
5135 fdh->oh = &fh->elf;
5136 fh->is_func = 1;
5137 fh->oh = &fdh->elf;
5138 }
5139
5140 fdh->elf.root.u.def.value = 0;
5141 fdh->elf.root.u.def.section = sym_sec;
5142 }
5143 }
5144 else
5145 {
5146 /* We'll be keeping this opd entry. */
5147
5148 if (h != NULL)
5149 {
5150 /* Redefine the function descriptor symbol
5151 to this location in the opd section.
5152 We've checked above that opd relocs are
5153 ordered. */
5154 struct ppc_link_hash_entry *fdh;
5155 struct ppc_link_hash_entry *fh;
5156
5157 fh = (struct ppc_link_hash_entry *) h;
5158 fdh = (struct ppc_link_hash_entry *) fh->oh;
5159 if (fdh == NULL)
5160 {
5161 const char *fd_name;
5162 struct ppc_link_hash_table *htab;
5163
5164 fd_name = h->root.root.string + 1;
5165 htab = ppc_hash_table (info);
5166 fdh = (struct ppc_link_hash_entry *)
5167 elf_link_hash_lookup (&htab->elf, fd_name,
5168 FALSE, FALSE, FALSE);
5169 fdh->is_func_descriptor = 1;
5170 fdh->oh = &fh->elf;
5171 fh->is_func = 1;
5172 fh->oh = &fdh->elf;
5173 }
5174
5175 fdh->elf.root.u.def.value = wptr - sec->contents;
5176 }
5177 else
5178 {
5179 /* Local syms are a bit tricky. We could
5180 tweak them as they can be cached, but
5181 we'd need to look through the local syms
5182 for the function descriptor sym which we
5183 don't have at the moment. So keep an
5184 array of adjustments. */
5185 adjust[rel->r_offset / 24] = wptr - rptr;
5186 }
5187
5188 if (wptr != rptr)
5189 memcpy (wptr, rptr, 24);
5190 wptr += 24;
5191 }
5192 rptr += 24;
5193 offset += 24;
5194 }
5195
5196 /* We need to adjust any reloc offsets to point to the
5197 new opd entries. While we're at it, we may as well
5198 remove redundant relocs. */
5199 if (!skip)
5200 {
5201 rel->r_offset += wptr - rptr;
5202 if (write_rel != rel)
5203 memcpy (write_rel, rel, sizeof (*rel));
5204 ++write_rel;
5205 }
5206 }
5207
5208 sec->_cooked_size = wptr - sec->contents;
5209 sec->reloc_count = write_rel - relstart;
5210 /* Fudge the size too, as this is used later in
5211 elf_bfd_final_link if we are emitting relocs. */
5212 elf_section_data (sec)->rel_hdr.sh_size
5213 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5214 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5215 }
5216 else if (elf_section_data (sec)->relocs != relstart)
5217 free (relstart);
5218
5219 if (local_syms != NULL
5220 && symtab_hdr->contents != (unsigned char *) local_syms)
5221 {
5222 if (!info->keep_memory)
5223 free (local_syms);
5224 else
5225 symtab_hdr->contents = (unsigned char *) local_syms;
5226 }
5227 }
5228
5229 return TRUE;
5230 }
5231
5232 /* Set htab->tls_sec. */
5233
5234 bfd_boolean
5235 ppc64_elf_tls_setup (obfd, info)
5236 bfd *obfd;
5237 struct bfd_link_info *info;
5238 {
5239 asection *tls;
5240 struct ppc_link_hash_table *htab;
5241
5242 for (tls = obfd->sections; tls != NULL; tls = tls->next)
5243 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
5244 == (SEC_THREAD_LOCAL | SEC_LOAD))
5245 break;
5246
5247 htab = ppc_hash_table (info);
5248 htab->tls_sec = tls;
5249
5250 if (htab->tls_get_addr != NULL)
5251 {
5252 struct elf_link_hash_entry *h = htab->tls_get_addr;
5253
5254 while (h->root.type == bfd_link_hash_indirect
5255 || h->root.type == bfd_link_hash_warning)
5256 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5257
5258 htab->tls_get_addr = h;
5259 }
5260
5261 return tls != NULL;
5262 }
5263
5264 /* Run through all the TLS relocs looking for optimization
5265 opportunities. The linker has been hacked (see ppc64elf.em) to do
5266 a preliminary section layout so that we know the TLS segment
5267 offsets. We can't optimize earlier because some optimizations need
5268 to know the tp offset, and we need to optimize before allocating
5269 dynamic relocations. */
5270
5271 bfd_boolean
5272 ppc64_elf_tls_optimize (obfd, info)
5273 bfd *obfd ATTRIBUTE_UNUSED;
5274 struct bfd_link_info *info;
5275 {
5276 bfd *ibfd;
5277 asection *sec;
5278 struct ppc_link_hash_table *htab;
5279
5280 if (info->relocateable || info->shared)
5281 return TRUE;
5282
5283 htab = ppc_hash_table (info);
5284 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5285 {
5286 Elf_Internal_Sym *locsyms = NULL;
5287
5288 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5289 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5290 {
5291 Elf_Internal_Rela *relstart, *rel, *relend;
5292 int expecting_tls_get_addr;
5293
5294 /* Read the relocations. */
5295 relstart = _bfd_elf_link_read_relocs (ibfd, sec, (PTR) NULL,
5296 (Elf_Internal_Rela *) NULL,
5297 info->keep_memory);
5298 if (relstart == NULL)
5299 return FALSE;
5300
5301 expecting_tls_get_addr = 0;
5302 relend = relstart + sec->reloc_count;
5303 for (rel = relstart; rel < relend; rel++)
5304 {
5305 enum elf_ppc64_reloc_type r_type;
5306 unsigned long r_symndx;
5307 struct elf_link_hash_entry *h;
5308 Elf_Internal_Sym *sym;
5309 asection *sym_sec;
5310 char *tls_mask;
5311 char tls_set, tls_clear, tls_type = 0;
5312 bfd_vma value;
5313 bfd_boolean ok_tprel, is_local;
5314
5315 r_symndx = ELF64_R_SYM (rel->r_info);
5316 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5317 r_symndx, ibfd))
5318 {
5319 err_free_rel:
5320 if (elf_section_data (sec)->relocs != relstart)
5321 free (relstart);
5322 if (locsyms != NULL
5323 && (elf_tdata (ibfd)->symtab_hdr.contents
5324 != (unsigned char *) locsyms))
5325 free (locsyms);
5326 return FALSE;
5327 }
5328
5329 if (h != NULL)
5330 {
5331 if (h->root.type != bfd_link_hash_defined
5332 && h->root.type != bfd_link_hash_defweak)
5333 continue;
5334 value = h->root.u.def.value;
5335 }
5336 else
5337 value = sym->st_value;
5338
5339 ok_tprel = FALSE;
5340 is_local = FALSE;
5341 if (h == NULL
5342 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5343 {
5344 is_local = TRUE;
5345 value += sym_sec->output_offset;
5346 value += sym_sec->output_section->vma;
5347 value -= htab->tls_sec->vma;
5348 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5349 < (bfd_vma) 1 << 32);
5350 }
5351
5352 r_type
5353 = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
5354 switch (r_type)
5355 {
5356 case R_PPC64_GOT_TLSLD16:
5357 case R_PPC64_GOT_TLSLD16_LO:
5358 case R_PPC64_GOT_TLSLD16_HI:
5359 case R_PPC64_GOT_TLSLD16_HA:
5360 /* These relocs should never be against a symbol
5361 defined in a shared lib. Leave them alone if
5362 that turns out to be the case. */
5363 htab->tlsld_got.refcount -= 1;
5364 if (!is_local)
5365 continue;
5366
5367 /* LD -> LE */
5368 tls_set = 0;
5369 tls_clear = TLS_LD;
5370 tls_type = TLS_TLS | TLS_LD;
5371 expecting_tls_get_addr = 1;
5372 break;
5373
5374 case R_PPC64_GOT_TLSGD16:
5375 case R_PPC64_GOT_TLSGD16_LO:
5376 case R_PPC64_GOT_TLSGD16_HI:
5377 case R_PPC64_GOT_TLSGD16_HA:
5378 if (ok_tprel)
5379 /* GD -> LE */
5380 tls_set = 0;
5381 else
5382 /* GD -> IE */
5383 tls_set = TLS_TLS | TLS_TPRELGD;
5384 tls_clear = TLS_GD;
5385 tls_type = TLS_TLS | TLS_GD;
5386 expecting_tls_get_addr = 1;
5387 break;
5388
5389 case R_PPC64_GOT_TPREL16_DS:
5390 case R_PPC64_GOT_TPREL16_LO_DS:
5391 case R_PPC64_GOT_TPREL16_HI:
5392 case R_PPC64_GOT_TPREL16_HA:
5393 expecting_tls_get_addr = 0;
5394 if (ok_tprel)
5395 {
5396 /* IE -> LE */
5397 tls_set = 0;
5398 tls_clear = TLS_TPREL;
5399 tls_type = TLS_TLS | TLS_TPREL;
5400 break;
5401 }
5402 else
5403 continue;
5404
5405 case R_PPC64_REL14:
5406 case R_PPC64_REL14_BRTAKEN:
5407 case R_PPC64_REL14_BRNTAKEN:
5408 case R_PPC64_REL24:
5409 if (h != NULL
5410 && h == htab->tls_get_addr)
5411 {
5412 if (!expecting_tls_get_addr
5413 && rel != relstart
5414 && ((ELF64_R_TYPE (rel[-1].r_info)
5415 == R_PPC64_TOC16)
5416 || (ELF64_R_TYPE (rel[-1].r_info)
5417 == R_PPC64_TOC16_LO)))
5418 {
5419 /* Check for toc tls entries. */
5420 char *toc_tls;
5421 int retval;
5422
5423 retval = get_tls_mask (&toc_tls, &locsyms,
5424 rel - 1, ibfd);
5425 if (retval == 0)
5426 goto err_free_rel;
5427 if (toc_tls != NULL)
5428 expecting_tls_get_addr = retval > 1;
5429 }
5430
5431 if (expecting_tls_get_addr)
5432 {
5433 struct plt_entry *ent;
5434 for (ent = h->plt.plist; ent; ent = ent->next)
5435 if (ent->addend == 0)
5436 {
5437 if (ent->plt.refcount > 0)
5438 ent->plt.refcount -= 1;
5439 break;
5440 }
5441 }
5442 }
5443 expecting_tls_get_addr = 0;
5444 continue;
5445
5446 case R_PPC64_TPREL64:
5447 expecting_tls_get_addr = 0;
5448 if (ok_tprel)
5449 {
5450 /* IE -> LE */
5451 tls_set = TLS_EXPLICIT;
5452 tls_clear = TLS_TPREL;
5453 break;
5454 }
5455 else
5456 continue;
5457
5458 case R_PPC64_DTPMOD64:
5459 expecting_tls_get_addr = 0;
5460 if (rel + 1 < relend
5461 && (rel[1].r_info
5462 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5463 && rel[1].r_offset == rel->r_offset + 8)
5464 {
5465 if (ok_tprel)
5466 /* GD -> LE */
5467 tls_set = TLS_EXPLICIT | TLS_GD;
5468 else
5469 /* GD -> IE */
5470 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5471 tls_clear = TLS_GD;
5472 }
5473 else
5474 {
5475 if (!is_local)
5476 continue;
5477
5478 /* LD -> LE */
5479 tls_set = TLS_EXPLICIT;
5480 tls_clear = TLS_LD;
5481 }
5482 break;
5483
5484 default:
5485 expecting_tls_get_addr = 0;
5486 continue;
5487 }
5488
5489 if ((tls_set & TLS_EXPLICIT) == 0)
5490 {
5491 struct got_entry *ent;
5492
5493 /* Adjust got entry for this reloc. */
5494 if (h != NULL)
5495 ent = h->got.glist;
5496 else
5497 ent = elf_local_got_ents (ibfd)[r_symndx];
5498
5499 for (; ent != NULL; ent = ent->next)
5500 if (ent->addend == rel->r_addend
5501 && ent->tls_type == tls_type)
5502 break;
5503 if (ent == NULL)
5504 abort ();
5505
5506 if (tls_set == 0)
5507 {
5508 /* We managed to get rid of a got entry. */
5509 if (ent->got.refcount > 0)
5510 ent->got.refcount -= 1;
5511 }
5512 }
5513 else if (h != NULL)
5514 {
5515 struct ppc_link_hash_entry * eh;
5516 struct ppc_dyn_relocs **pp;
5517 struct ppc_dyn_relocs *p;
5518
5519 /* Adjust dynamic relocs. */
5520 eh = (struct ppc_link_hash_entry *) h;
5521 for (pp = &eh->dyn_relocs;
5522 (p = *pp) != NULL;
5523 pp = &p->next)
5524 if (p->sec == sec)
5525 {
5526 /* If we got rid of a DTPMOD/DTPREL reloc
5527 pair then we'll lose one or two dyn
5528 relocs. */
5529 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5530 p->count -= 1;
5531 p->count -= 1;
5532 if (p->count == 0)
5533 *pp = p->next;
5534 break;
5535 }
5536 }
5537
5538 *tls_mask |= tls_set;
5539 *tls_mask &= ~tls_clear;
5540 }
5541
5542 if (elf_section_data (sec)->relocs != relstart)
5543 free (relstart);
5544 }
5545
5546 if (locsyms != NULL
5547 && (elf_tdata (ibfd)->symtab_hdr.contents
5548 != (unsigned char *) locsyms))
5549 {
5550 if (!info->keep_memory)
5551 free (locsyms);
5552 else
5553 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5554 }
5555 }
5556 return TRUE;
5557 }
5558
5559 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
5560 will be called from elflink.h. If elflink.h doesn't call our
5561 finish_dynamic_symbol routine, we'll need to do something about
5562 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
5563 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
5564 ((DYN) \
5565 && ((SHARED) \
5566 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
5567 && ((H)->dynindx != -1 \
5568 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5569
5570 /* Allocate space in .plt, .got and associated reloc sections for
5571 dynamic relocs. */
5572
5573 static bfd_boolean
5574 allocate_dynrelocs (h, inf)
5575 struct elf_link_hash_entry *h;
5576 PTR inf;
5577 {
5578 struct bfd_link_info *info;
5579 struct ppc_link_hash_table *htab;
5580 asection *s;
5581 struct ppc_link_hash_entry *eh;
5582 struct ppc_dyn_relocs *p;
5583 struct got_entry *gent;
5584
5585 if (h->root.type == bfd_link_hash_indirect)
5586 return TRUE;
5587
5588 if (h->root.type == bfd_link_hash_warning)
5589 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5590
5591 info = (struct bfd_link_info *) inf;
5592 htab = ppc_hash_table (info);
5593
5594 if (htab->elf.dynamic_sections_created
5595 && h->dynindx != -1
5596 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5597 {
5598 struct plt_entry *pent;
5599 bfd_boolean doneone = FALSE;
5600 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5601 if (pent->plt.refcount > 0)
5602 {
5603 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5604
5605 /* If this is the first .plt entry, make room for the special
5606 first entry. */
5607 s = htab->splt;
5608 if (s->_raw_size == 0)
5609 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5610
5611 pent->plt.offset = s->_raw_size;
5612
5613 /* Make room for this entry. */
5614 s->_raw_size += PLT_ENTRY_SIZE;
5615
5616 /* Make room for the .glink code. */
5617 s = htab->sglink;
5618 if (s->_raw_size == 0)
5619 s->_raw_size += GLINK_CALL_STUB_SIZE;
5620 /* We need bigger stubs past index 32767. */
5621 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5622 s->_raw_size += 4;
5623 s->_raw_size += 2*4;
5624
5625 /* We also need to make an entry in the .rela.plt section. */
5626 s = htab->srelplt;
5627 s->_raw_size += sizeof (Elf64_External_Rela);
5628 doneone = TRUE;
5629 }
5630 else
5631 pent->plt.offset = (bfd_vma) -1;
5632 if (!doneone)
5633 {
5634 h->plt.plist = NULL;
5635 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5636 }
5637 }
5638 else
5639 {
5640 h->plt.plist = NULL;
5641 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5642 }
5643
5644 eh = (struct ppc_link_hash_entry *) h;
5645 /* Run through the TLS GD got entries first if we're changing them
5646 to TPREL. */
5647 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5648 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5649 if (gent->got.refcount > 0
5650 && (gent->tls_type & TLS_GD) != 0)
5651 {
5652 /* This was a GD entry that has been converted to TPREL. If
5653 there happens to be a TPREL entry we can use that one. */
5654 struct got_entry *ent;
5655 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5656 if (ent->got.refcount > 0
5657 && (ent->tls_type & TLS_TPREL) != 0
5658 && ent->addend == gent->addend)
5659 {
5660 gent->got.refcount = 0;
5661 break;
5662 }
5663
5664 /* If not, then we'll be using our own TPREL entry. */
5665 if (gent->got.refcount != 0)
5666 gent->tls_type = TLS_TLS | TLS_TPREL;
5667 }
5668
5669 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5670 if (gent->got.refcount > 0)
5671 {
5672 bfd_boolean dyn;
5673
5674 /* Make sure this symbol is output as a dynamic symbol.
5675 Undefined weak syms won't yet be marked as dynamic,
5676 nor will all TLS symbols. */
5677 if (h->dynindx == -1
5678 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5679 {
5680 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5681 return FALSE;
5682 }
5683
5684 if ((gent->tls_type & TLS_LD) != 0
5685 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5686 {
5687 gent->got.offset = htab->tlsld_got.offset;
5688 continue;
5689 }
5690
5691 s = htab->sgot;
5692 gent->got.offset = s->_raw_size;
5693 s->_raw_size
5694 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5695 dyn = htab->elf.dynamic_sections_created;
5696 if ((info->shared
5697 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5698 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5699 || h->root.type != bfd_link_hash_undefweak))
5700 htab->srelgot->_raw_size
5701 += (gent->tls_type & eh->tls_mask & TLS_GD
5702 ? 2 * sizeof (Elf64_External_Rela)
5703 : sizeof (Elf64_External_Rela));
5704 }
5705 else
5706 gent->got.offset = (bfd_vma) -1;
5707
5708 if (eh->dyn_relocs == NULL)
5709 return TRUE;
5710
5711 /* In the shared -Bsymbolic case, discard space allocated for
5712 dynamic pc-relative relocs against symbols which turn out to be
5713 defined in regular objects. For the normal shared case, discard
5714 space for relocs that have become local due to symbol visibility
5715 changes. */
5716
5717 if (info->shared)
5718 {
5719 /* Relocs that use pc_count are those that appear on a call insn,
5720 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5721 generated via assembly. We want calls to protected symbols to
5722 resolve directly to the function rather than going via the plt.
5723 If people want function pointer comparisons to work as expected
5724 then they should avoid writing weird assembly. */
5725 if (SYMBOL_CALLS_LOCAL (info, h))
5726 {
5727 struct ppc_dyn_relocs **pp;
5728
5729 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5730 {
5731 p->count -= p->pc_count;
5732 p->pc_count = 0;
5733 if (p->count == 0)
5734 *pp = p->next;
5735 else
5736 pp = &p->next;
5737 }
5738 }
5739
5740 /* Also discard relocs on undefined weak syms with non-default
5741 visibility. */
5742 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5743 && h->root.type == bfd_link_hash_undefweak)
5744 eh->dyn_relocs = NULL;
5745 }
5746 else if (ELIMINATE_COPY_RELOCS)
5747 {
5748 /* For the non-shared case, discard space for relocs against
5749 symbols which turn out to need copy relocs or are not
5750 dynamic. */
5751
5752 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5753 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5754 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5755 {
5756 /* Make sure this symbol is output as a dynamic symbol.
5757 Undefined weak syms won't yet be marked as dynamic. */
5758 if (h->dynindx == -1
5759 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5760 {
5761 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5762 return FALSE;
5763 }
5764
5765 /* If that succeeded, we know we'll be keeping all the
5766 relocs. */
5767 if (h->dynindx != -1)
5768 goto keep;
5769 }
5770
5771 eh->dyn_relocs = NULL;
5772
5773 keep: ;
5774 }
5775
5776 /* Finally, allocate space. */
5777 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5778 {
5779 asection *sreloc = elf_section_data (p->sec)->sreloc;
5780 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5781 }
5782
5783 return TRUE;
5784 }
5785
5786 /* Find any dynamic relocs that apply to read-only sections. */
5787
5788 static bfd_boolean
5789 readonly_dynrelocs (h, inf)
5790 struct elf_link_hash_entry *h;
5791 PTR inf;
5792 {
5793 struct ppc_link_hash_entry *eh;
5794 struct ppc_dyn_relocs *p;
5795
5796 if (h->root.type == bfd_link_hash_warning)
5797 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5798
5799 eh = (struct ppc_link_hash_entry *) h;
5800 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5801 {
5802 asection *s = p->sec->output_section;
5803
5804 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5805 {
5806 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5807
5808 info->flags |= DF_TEXTREL;
5809
5810 /* Not an error, just cut short the traversal. */
5811 return FALSE;
5812 }
5813 }
5814 return TRUE;
5815 }
5816
5817 /* Set the sizes of the dynamic sections. */
5818
5819 static bfd_boolean
5820 ppc64_elf_size_dynamic_sections (output_bfd, info)
5821 bfd *output_bfd ATTRIBUTE_UNUSED;
5822 struct bfd_link_info *info;
5823 {
5824 struct ppc_link_hash_table *htab;
5825 bfd *dynobj;
5826 asection *s;
5827 bfd_boolean relocs;
5828 bfd *ibfd;
5829
5830 htab = ppc_hash_table (info);
5831 dynobj = htab->elf.dynobj;
5832 if (dynobj == NULL)
5833 abort ();
5834
5835 if (htab->elf.dynamic_sections_created)
5836 {
5837 /* Set the contents of the .interp section to the interpreter. */
5838 if (info->executable)
5839 {
5840 s = bfd_get_section_by_name (dynobj, ".interp");
5841 if (s == NULL)
5842 abort ();
5843 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5844 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5845 }
5846 }
5847
5848 if (htab->tlsld_got.refcount > 0)
5849 {
5850 htab->tlsld_got.offset = htab->sgot->_raw_size;
5851 htab->sgot->_raw_size += 16;
5852 if (info->shared)
5853 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
5854 }
5855 else
5856 htab->tlsld_got.offset = (bfd_vma) -1;
5857
5858 /* Set up .got offsets for local syms, and space for local dynamic
5859 relocs. */
5860 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5861 {
5862 struct got_entry **lgot_ents;
5863 struct got_entry **end_lgot_ents;
5864 char *lgot_masks;
5865 bfd_size_type locsymcount;
5866 Elf_Internal_Shdr *symtab_hdr;
5867 asection *srel;
5868
5869 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5870 continue;
5871
5872 for (s = ibfd->sections; s != NULL; s = s->next)
5873 {
5874 struct ppc_dyn_relocs *p;
5875
5876 for (p = *((struct ppc_dyn_relocs **)
5877 &elf_section_data (s)->local_dynrel);
5878 p != NULL;
5879 p = p->next)
5880 {
5881 if (!bfd_is_abs_section (p->sec)
5882 && bfd_is_abs_section (p->sec->output_section))
5883 {
5884 /* Input section has been discarded, either because
5885 it is a copy of a linkonce section or due to
5886 linker script /DISCARD/, so we'll be discarding
5887 the relocs too. */
5888 }
5889 else if (p->count != 0)
5890 {
5891 srel = elf_section_data (p->sec)->sreloc;
5892 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5893 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5894 info->flags |= DF_TEXTREL;
5895 }
5896 }
5897 }
5898
5899 lgot_ents = elf_local_got_ents (ibfd);
5900 if (!lgot_ents)
5901 continue;
5902
5903 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5904 locsymcount = symtab_hdr->sh_info;
5905 end_lgot_ents = lgot_ents + locsymcount;
5906 lgot_masks = (char *) end_lgot_ents;
5907 s = htab->sgot;
5908 srel = htab->srelgot;
5909 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5910 {
5911 struct got_entry *ent;
5912
5913 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5914 if (ent->got.refcount > 0)
5915 {
5916 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5917 {
5918 if (htab->tlsld_got.offset == (bfd_vma) -1)
5919 {
5920 htab->tlsld_got.offset = s->_raw_size;
5921 s->_raw_size += 16;
5922 if (info->shared)
5923 srel->_raw_size += sizeof (Elf64_External_Rela);
5924 }
5925 ent->got.offset = htab->tlsld_got.offset;
5926 }
5927 else
5928 {
5929 ent->got.offset = s->_raw_size;
5930 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5931 {
5932 s->_raw_size += 16;
5933 if (info->shared)
5934 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5935 }
5936 else
5937 {
5938 s->_raw_size += 8;
5939 if (info->shared)
5940 srel->_raw_size += sizeof (Elf64_External_Rela);
5941 }
5942 }
5943 }
5944 else
5945 ent->got.offset = (bfd_vma) -1;
5946 }
5947 }
5948
5949 /* Allocate global sym .plt and .got entries, and space for global
5950 sym dynamic relocs. */
5951 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
5952
5953 /* We now have determined the sizes of the various dynamic sections.
5954 Allocate memory for them. */
5955 relocs = FALSE;
5956 for (s = dynobj->sections; s != NULL; s = s->next)
5957 {
5958 if ((s->flags & SEC_LINKER_CREATED) == 0)
5959 continue;
5960
5961 /* Reset _cooked_size since prelim layout will set it wrongly,
5962 and a non-zero _cooked_size sticks. */
5963 s->_cooked_size = 0;
5964
5965 if (s == htab->sbrlt || s == htab->srelbrlt)
5966 /* These haven't been allocated yet; don't strip. */
5967 continue;
5968 else if (s == htab->sgot)
5969 {
5970 /* Automatic multiple tocs aren't possible if we are using the
5971 GOT. The GOT is accessed via r2, so we can't adjust r2.
5972 FIXME: There's no reason why we couldn't lay out multiple
5973 GOTs too. */
5974 if (s->_raw_size > elf_backend_got_header_size)
5975 htab->no_multi_toc = 1;
5976 }
5977 else if (s == htab->splt
5978 || s == htab->sglink)
5979 {
5980 /* Strip this section if we don't need it; see the
5981 comment below. */
5982 }
5983 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5984 {
5985 if (s->_raw_size == 0)
5986 {
5987 /* If we don't need this section, strip it from the
5988 output file. This is mostly to handle .rela.bss and
5989 .rela.plt. We must create both sections in
5990 create_dynamic_sections, because they must be created
5991 before the linker maps input sections to output
5992 sections. The linker does that before
5993 adjust_dynamic_symbol is called, and it is that
5994 function which decides whether anything needs to go
5995 into these sections. */
5996 }
5997 else
5998 {
5999 if (s != htab->srelplt)
6000 relocs = TRUE;
6001
6002 /* We use the reloc_count field as a counter if we need
6003 to copy relocs into the output file. */
6004 s->reloc_count = 0;
6005 }
6006 }
6007 else
6008 {
6009 /* It's not one of our sections, so don't allocate space. */
6010 continue;
6011 }
6012
6013 if (s->_raw_size == 0)
6014 {
6015 _bfd_strip_section_from_output (info, s);
6016 continue;
6017 }
6018
6019 /* .plt is in the bss section. We don't initialise it. */
6020 if ((s->flags & SEC_LOAD) == 0)
6021 continue;
6022
6023 /* Allocate memory for the section contents. We use bfd_zalloc
6024 here in case unused entries are not reclaimed before the
6025 section's contents are written out. This should not happen,
6026 but this way if it does we get a R_PPC64_NONE reloc in .rela
6027 sections instead of garbage.
6028 We also rely on the section contents being zero when writing
6029 the GOT. */
6030 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
6031 if (s->contents == NULL)
6032 return FALSE;
6033 }
6034
6035 if (htab->elf.dynamic_sections_created)
6036 {
6037 /* Add some entries to the .dynamic section. We fill in the
6038 values later, in ppc64_elf_finish_dynamic_sections, but we
6039 must add the entries now so that we get the correct size for
6040 the .dynamic section. The DT_DEBUG entry is filled in by the
6041 dynamic linker and used by the debugger. */
6042 #define add_dynamic_entry(TAG, VAL) \
6043 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
6044
6045 if (info->executable)
6046 {
6047 if (!add_dynamic_entry (DT_DEBUG, 0))
6048 return FALSE;
6049 }
6050
6051 if (htab->splt != NULL && htab->splt->_raw_size != 0)
6052 {
6053 if (!add_dynamic_entry (DT_PLTGOT, 0)
6054 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6055 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6056 || !add_dynamic_entry (DT_JMPREL, 0)
6057 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
6058 return FALSE;
6059 }
6060
6061 if (NO_OPD_RELOCS)
6062 {
6063 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
6064 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
6065 return FALSE;
6066 }
6067
6068 if (relocs)
6069 {
6070 if (!add_dynamic_entry (DT_RELA, 0)
6071 || !add_dynamic_entry (DT_RELASZ, 0)
6072 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6073 return FALSE;
6074
6075 /* If any dynamic relocs apply to a read-only section,
6076 then we need a DT_TEXTREL entry. */
6077 if ((info->flags & DF_TEXTREL) == 0)
6078 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
6079 (PTR) info);
6080
6081 if ((info->flags & DF_TEXTREL) != 0)
6082 {
6083 if (!add_dynamic_entry (DT_TEXTREL, 0))
6084 return FALSE;
6085 }
6086 }
6087 }
6088 #undef add_dynamic_entry
6089
6090 return TRUE;
6091 }
6092
6093 /* Determine the type of stub needed, if any, for a call. */
6094
6095 static INLINE enum ppc_stub_type
6096 ppc_type_of_stub (input_sec, rel, hash, destination)
6097 asection *input_sec;
6098 const Elf_Internal_Rela *rel;
6099 struct ppc_link_hash_entry **hash;
6100 bfd_vma destination;
6101 {
6102 struct ppc_link_hash_entry *h = *hash;
6103 bfd_vma location;
6104 bfd_vma branch_offset;
6105 bfd_vma max_branch_offset;
6106 unsigned int r_type;
6107
6108 if (h != NULL)
6109 {
6110 if (h->oh != NULL
6111 && h->oh->dynindx != -1)
6112 {
6113 struct plt_entry *ent;
6114 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6115 if (ent->addend == rel->r_addend
6116 && ent->plt.offset != (bfd_vma) -1)
6117 {
6118 *hash = (struct ppc_link_hash_entry *) h->oh;
6119 return ppc_stub_plt_call;
6120 }
6121 }
6122
6123 if (h->elf.root.type != bfd_link_hash_defined
6124 && h->elf.root.type != bfd_link_hash_defweak)
6125 return ppc_stub_none;
6126 }
6127
6128 /* Determine where the call point is. */
6129 location = (input_sec->output_offset
6130 + input_sec->output_section->vma
6131 + rel->r_offset);
6132
6133 branch_offset = destination - location;
6134 r_type = ELF64_R_TYPE (rel->r_info);
6135
6136 /* Determine if a long branch stub is needed. */
6137 max_branch_offset = 1 << 25;
6138 if (r_type != (unsigned int) R_PPC64_REL24)
6139 max_branch_offset = 1 << 15;
6140
6141 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6142 /* We need a stub. Figure out whether a long_branch or plt_branch
6143 is needed later. */
6144 return ppc_stub_long_branch;
6145
6146 return ppc_stub_none;
6147 }
6148
6149 /* Build a .plt call stub. */
6150
6151 static bfd_byte *
6152 build_plt_stub (obfd, p, offset)
6153 bfd *obfd;
6154 bfd_byte *p;
6155 int offset;
6156 {
6157 #define PPC_LO(v) ((v) & 0xffff)
6158 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6159 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6160
6161 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6162 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6163 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6164 if (PPC_HA (offset + 8) != PPC_HA (offset))
6165 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6166 offset += 8;
6167 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6168 if (PPC_HA (offset + 8) != PPC_HA (offset))
6169 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6170 offset += 8;
6171 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6172 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6173 bfd_put_32 (obfd, BCTR, p), p += 4;
6174 return p;
6175 }
6176
6177 static bfd_boolean
6178 ppc_build_one_stub (gen_entry, in_arg)
6179 struct bfd_hash_entry *gen_entry;
6180 PTR in_arg;
6181 {
6182 struct ppc_stub_hash_entry *stub_entry;
6183 struct ppc_branch_hash_entry *br_entry;
6184 struct bfd_link_info *info;
6185 struct ppc_link_hash_table *htab;
6186 asection *stub_sec;
6187 bfd *stub_bfd;
6188 bfd_byte *loc;
6189 bfd_byte *p;
6190 unsigned int indx;
6191 struct plt_entry *ent;
6192 bfd_vma off;
6193 int size;
6194
6195 /* Massage our args to the form they really have. */
6196 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6197 info = (struct bfd_link_info *) in_arg;
6198
6199 htab = ppc_hash_table (info);
6200 stub_sec = stub_entry->stub_sec;
6201
6202 /* Make a note of the offset within the stubs for this entry. */
6203 stub_entry->stub_offset = stub_sec->_cooked_size;
6204 loc = stub_sec->contents + stub_entry->stub_offset;
6205
6206 if (htab->emit_stub_syms)
6207 {
6208 struct elf_link_hash_entry *h;
6209 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6210 TRUE, FALSE, FALSE);
6211 if (h == NULL)
6212 return FALSE;
6213 h->root.type = bfd_link_hash_defined;
6214 h->root.u.def.section = stub_entry->stub_sec;
6215 h->root.u.def.value = stub_entry->stub_offset;
6216 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6217 | ELF_LINK_HASH_DEF_REGULAR
6218 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6219 | ELF_LINK_FORCED_LOCAL);
6220 }
6221
6222 stub_bfd = stub_sec->owner;
6223
6224 switch (stub_entry->stub_type)
6225 {
6226 case ppc_stub_long_branch:
6227 case ppc_stub_long_branch_r2off:
6228 /* Branches are relative. This is where we are going to. */
6229 off = (stub_entry->target_value
6230 + stub_entry->target_section->output_offset
6231 + stub_entry->target_section->output_section->vma);
6232
6233 /* And this is where we are coming from. */
6234 off -= (stub_entry->stub_offset
6235 + stub_sec->output_offset
6236 + stub_sec->output_section->vma);
6237
6238 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6239 size = 4;
6240 else
6241 {
6242 bfd_vma r2off;
6243
6244 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6245 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6246 bfd_put_32 (stub_bfd, (bfd_vma) STD_R2_40R1, loc);
6247 loc += 4;
6248 bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R2_R2 | PPC_HA (r2off), loc);
6249 loc += 4;
6250 bfd_put_32 (stub_bfd, (bfd_vma) ADDI_R2_R2 | PPC_LO (r2off), loc);
6251 loc += 4;
6252 off -= 12;
6253 size = 16;
6254 }
6255 bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
6256
6257 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6258 break;
6259
6260 case ppc_stub_plt_branch:
6261 case ppc_stub_plt_branch_r2off:
6262 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6263 stub_entry->root.string + 9,
6264 FALSE, FALSE);
6265 if (br_entry == NULL)
6266 {
6267 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6268 stub_entry->root.string + 9);
6269 htab->stub_error = TRUE;
6270 return FALSE;
6271 }
6272
6273 off = (stub_entry->target_value
6274 + stub_entry->target_section->output_offset
6275 + stub_entry->target_section->output_section->vma);
6276
6277 bfd_put_64 (htab->sbrlt->owner, off,
6278 htab->sbrlt->contents + br_entry->offset);
6279
6280 if (info->shared)
6281 {
6282 /* Create a reloc for the branch lookup table entry. */
6283 Elf_Internal_Rela rela;
6284 bfd_byte *rl;
6285
6286 rela.r_offset = (br_entry->offset
6287 + htab->sbrlt->output_offset
6288 + htab->sbrlt->output_section->vma);
6289 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6290 rela.r_addend = off;
6291
6292 rl = htab->srelbrlt->contents;
6293 rl += htab->srelbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6294 bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, rl);
6295 }
6296
6297 off = (br_entry->offset
6298 + htab->sbrlt->output_offset
6299 + htab->sbrlt->output_section->vma
6300 - elf_gp (htab->sbrlt->output_section->owner)
6301 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6302
6303 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6304 {
6305 (*_bfd_error_handler)
6306 (_("linkage table error against `%s'"),
6307 stub_entry->root.string);
6308 bfd_set_error (bfd_error_bad_value);
6309 htab->stub_error = TRUE;
6310 return FALSE;
6311 }
6312
6313 indx = off;
6314 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6315 {
6316 bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
6317 loc += 4;
6318 bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc);
6319 size = 16;
6320 }
6321 else
6322 {
6323 bfd_vma r2off;
6324
6325 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6326 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6327 bfd_put_32 (stub_bfd, (bfd_vma) STD_R2_40R1, loc);
6328 loc += 4;
6329 bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
6330 loc += 4;
6331 bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc);
6332 loc += 4;
6333 bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R2_R2 | PPC_HA (r2off), loc);
6334 loc += 4;
6335 bfd_put_32 (stub_bfd, (bfd_vma) ADDI_R2_R2 | PPC_LO (r2off), loc);
6336 size = 28;
6337 }
6338 loc += 4;
6339 bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc);
6340 loc += 4;
6341 bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc);
6342 break;
6343
6344 case ppc_stub_plt_call:
6345 /* Do the best we can for shared libraries built without
6346 exporting ".foo" for each "foo". This can happen when symbol
6347 versioning scripts strip all bar a subset of symbols. */
6348 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6349 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6350 {
6351 /* Point the symbol at the stub. There may be multiple stubs,
6352 we don't really care; The main thing is to make this sym
6353 defined somewhere. */
6354 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6355 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6356 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6357 }
6358
6359 /* Now build the stub. */
6360 off = (bfd_vma) -1;
6361 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6362 if (ent->addend == stub_entry->addend)
6363 {
6364 off = ent->plt.offset;
6365 break;
6366 }
6367 if (off >= (bfd_vma) -2)
6368 abort ();
6369
6370 off &= ~ (bfd_vma) 1;
6371 off += (htab->splt->output_offset
6372 + htab->splt->output_section->vma
6373 - elf_gp (htab->splt->output_section->owner)
6374 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6375
6376 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6377 {
6378 (*_bfd_error_handler)
6379 (_("linkage table error against `%s'"),
6380 stub_entry->h->elf.root.root.string);
6381 bfd_set_error (bfd_error_bad_value);
6382 htab->stub_error = TRUE;
6383 return FALSE;
6384 }
6385
6386 p = build_plt_stub (stub_bfd, loc, (int) off);
6387 size = p - loc;
6388 break;
6389
6390 default:
6391 BFD_FAIL ();
6392 return FALSE;
6393 }
6394
6395 stub_sec->_cooked_size += size;
6396 return TRUE;
6397 }
6398
6399 /* As above, but don't actually build the stub. Just bump offset so
6400 we know stub section sizes, and select plt_branch stubs where
6401 long_branch stubs won't do. */
6402
6403 static bfd_boolean
6404 ppc_size_one_stub (gen_entry, in_arg)
6405 struct bfd_hash_entry *gen_entry;
6406 PTR in_arg;
6407 {
6408 struct ppc_stub_hash_entry *stub_entry;
6409 struct ppc_link_hash_table *htab;
6410 bfd_vma off;
6411 int size;
6412
6413 /* Massage our args to the form they really have. */
6414 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6415 htab = (struct ppc_link_hash_table *) in_arg;
6416
6417 if (stub_entry->stub_type == ppc_stub_plt_call)
6418 {
6419 struct plt_entry *ent;
6420 off = (bfd_vma) -1;
6421 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6422 if (ent->addend == stub_entry->addend)
6423 {
6424 off = ent->plt.offset & ~(bfd_vma) 1;
6425 break;
6426 }
6427 if (off >= (bfd_vma) -2)
6428 abort ();
6429 off += (htab->splt->output_offset
6430 + htab->splt->output_section->vma
6431 - elf_gp (htab->splt->output_section->owner)
6432 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6433
6434 size = PLT_CALL_STUB_SIZE;
6435 if (PPC_HA ((int) off + 16) != PPC_HA ((int) off))
6436 size += 4;
6437 }
6438 else
6439 {
6440 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6441 variants. */
6442 off = (stub_entry->target_value
6443 + stub_entry->target_section->output_offset
6444 + stub_entry->target_section->output_section->vma);
6445 off -= (stub_entry->stub_sec->_raw_size
6446 + stub_entry->stub_sec->output_offset
6447 + stub_entry->stub_sec->output_section->vma);
6448
6449 /* Reset the stub type from the plt variant in case we now
6450 can reach with a shorter stub. */
6451 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6452 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6453
6454 size = 4;
6455 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6456 {
6457 off -= 12;
6458 size = 16;
6459 }
6460
6461 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6462 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6463 {
6464 struct ppc_branch_hash_entry *br_entry;
6465
6466 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6467 stub_entry->root.string + 9,
6468 TRUE, FALSE);
6469 if (br_entry == NULL)
6470 {
6471 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6472 stub_entry->root.string + 9);
6473 htab->stub_error = TRUE;
6474 return FALSE;
6475 }
6476
6477 if (br_entry->iter != htab->stub_iteration)
6478 {
6479 br_entry->iter = htab->stub_iteration;
6480 br_entry->offset = htab->sbrlt->_raw_size;
6481 htab->sbrlt->_raw_size += 8;
6482 }
6483
6484 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6485 size = 16;
6486 if (stub_entry->stub_type != ppc_stub_plt_branch)
6487 size = 28;
6488 }
6489 }
6490
6491 stub_entry->stub_sec->_raw_size += size;
6492 return TRUE;
6493 }
6494
6495 /* Set up various things so that we can make a list of input sections
6496 for each output section included in the link. Returns -1 on error,
6497 0 when no stubs will be needed, and 1 on success. */
6498
6499 int
6500 ppc64_elf_setup_section_lists (output_bfd, info)
6501 bfd *output_bfd;
6502 struct bfd_link_info *info;
6503 {
6504 bfd *input_bfd;
6505 int top_id, top_index, id;
6506 asection *section;
6507 asection **input_list;
6508 bfd_size_type amt;
6509 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6510
6511 if (htab->sbrlt == NULL)
6512 return 0;
6513
6514 /* Find the top input section id. */
6515 for (input_bfd = info->input_bfds, top_id = 3;
6516 input_bfd != NULL;
6517 input_bfd = input_bfd->link_next)
6518 {
6519 for (section = input_bfd->sections;
6520 section != NULL;
6521 section = section->next)
6522 {
6523 if (top_id < section->id)
6524 top_id = section->id;
6525 }
6526 }
6527
6528 amt = sizeof (struct map_stub) * (top_id + 1);
6529 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
6530 if (htab->stub_group == NULL)
6531 return -1;
6532
6533 /* Set toc_off for com, und, abs and ind sections. */
6534 for (id = 0; id < 3; id++)
6535 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6536
6537 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6538
6539 /* We can't use output_bfd->section_count here to find the top output
6540 section index as some sections may have been removed, and
6541 _bfd_strip_section_from_output doesn't renumber the indices. */
6542 for (section = output_bfd->sections, top_index = 0;
6543 section != NULL;
6544 section = section->next)
6545 {
6546 if (top_index < section->index)
6547 top_index = section->index;
6548 }
6549
6550 htab->top_index = top_index;
6551 amt = sizeof (asection *) * (top_index + 1);
6552 input_list = (asection **) bfd_zmalloc (amt);
6553 htab->input_list = input_list;
6554 if (input_list == NULL)
6555 return -1;
6556
6557 return 1;
6558 }
6559
6560 /* The linker repeatedly calls this function for each toc input
6561 section. Group input bfds such that the toc within a group
6562 is less than 64k in size. Will break with cute linker scripts
6563 that play games with dot in the output toc section. */
6564
6565 void
6566 ppc64_elf_next_toc_section (info, isec)
6567 struct bfd_link_info *info;
6568 asection *isec;
6569 {
6570 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6571
6572 if (!htab->no_multi_toc)
6573 {
6574 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6575 bfd_vma off = addr - htab->toc_curr;
6576 if (off + isec->_raw_size > 0x10000)
6577 {
6578 htab->toc_curr = addr;
6579 htab->multi_toc_needed = 1;
6580 }
6581 elf_gp (isec->owner) = (htab->toc_curr
6582 - elf_gp (isec->output_section->owner)
6583 + TOC_BASE_OFF);
6584 }
6585 }
6586
6587 /* Called after the last call to the above function. */
6588
6589 void
6590 ppc64_elf_reinit_toc (output_bfd, info)
6591 bfd *output_bfd ATTRIBUTE_UNUSED;
6592 struct bfd_link_info *info;
6593 {
6594 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6595
6596 /* toc_curr tracks the TOC offset used for code sections below in
6597 ppc64_elf_next_input_section. Start off at 0x8000. */
6598 htab->toc_curr = TOC_BASE_OFF;
6599 }
6600
6601 /* The linker repeatedly calls this function for each input section,
6602 in the order that input sections are linked into output sections.
6603 Build lists of input sections to determine groupings between which
6604 we may insert linker stubs. */
6605
6606 void
6607 ppc64_elf_next_input_section (info, isec)
6608 struct bfd_link_info *info;
6609 asection *isec;
6610 {
6611 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6612
6613 if ((isec->output_section->flags & SEC_CODE) != 0
6614 && isec->output_section->index <= htab->top_index)
6615 {
6616 asection **list = htab->input_list + isec->output_section->index;
6617 /* Steal the link_sec pointer for our list. */
6618 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6619 /* This happens to make the list in reverse order,
6620 which is what we want. */
6621 PREV_SEC (isec) = *list;
6622 *list = isec;
6623 }
6624
6625 /* If a code section has a function that uses the TOC then we need
6626 to use the right TOC (obviously). Also, make sure that .opd gets
6627 the correct TOC value. */
6628 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6629 if (elf_gp (isec->owner) != 0)
6630 htab->toc_curr = elf_gp (isec->owner);
6631
6632 /* Functions that don't use the TOC can belong in any TOC group.
6633 Use the last TOC base. This happens to make _init and _fini
6634 pasting work. */
6635 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6636 }
6637
6638 /* See whether we can group stub sections together. Grouping stub
6639 sections may result in fewer stubs. More importantly, we need to
6640 put all .init* and .fini* stubs at the beginning of the .init or
6641 .fini output sections respectively, because glibc splits the
6642 _init and _fini functions into multiple parts. Putting a stub in
6643 the middle of a function is not a good idea. */
6644
6645 static void
6646 group_sections (htab, stub_group_size, stubs_always_before_branch)
6647 struct ppc_link_hash_table *htab;
6648 bfd_size_type stub_group_size;
6649 bfd_boolean stubs_always_before_branch;
6650 {
6651 asection **list = htab->input_list + htab->top_index;
6652 do
6653 {
6654 asection *tail = *list;
6655 while (tail != NULL)
6656 {
6657 asection *curr;
6658 asection *prev;
6659 bfd_size_type total;
6660 bfd_boolean big_sec;
6661 bfd_vma curr_toc;
6662
6663 curr = tail;
6664 if (tail->_cooked_size)
6665 total = tail->_cooked_size;
6666 else
6667 total = tail->_raw_size;
6668 big_sec = total >= stub_group_size;
6669 curr_toc = htab->stub_group[tail->id].toc_off;
6670
6671 while ((prev = PREV_SEC (curr)) != NULL
6672 && ((total += curr->output_offset - prev->output_offset)
6673 < stub_group_size)
6674 && htab->stub_group[prev->id].toc_off == curr_toc)
6675 curr = prev;
6676
6677 /* OK, the size from the start of CURR to the end is less
6678 than stub_group_size and thus can be handled by one stub
6679 section. (or the tail section is itself larger than
6680 stub_group_size, in which case we may be toast.) We
6681 should really be keeping track of the total size of stubs
6682 added here, as stubs contribute to the final output
6683 section size. That's a little tricky, and this way will
6684 only break if stubs added make the total size more than
6685 2^25, ie. for the default stub_group_size, if stubs total
6686 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6687 do
6688 {
6689 prev = PREV_SEC (tail);
6690 /* Set up this stub group. */
6691 htab->stub_group[tail->id].link_sec = curr;
6692 }
6693 while (tail != curr && (tail = prev) != NULL);
6694
6695 /* But wait, there's more! Input sections up to stub_group_size
6696 bytes before the stub section can be handled by it too.
6697 Don't do this if we have a really large section after the
6698 stubs, as adding more stubs increases the chance that
6699 branches may not reach into the stub section. */
6700 if (!stubs_always_before_branch && !big_sec)
6701 {
6702 total = 0;
6703 while (prev != NULL
6704 && ((total += tail->output_offset - prev->output_offset)
6705 < stub_group_size)
6706 && htab->stub_group[prev->id].toc_off == curr_toc)
6707 {
6708 tail = prev;
6709 prev = PREV_SEC (tail);
6710 htab->stub_group[tail->id].link_sec = curr;
6711 }
6712 }
6713 tail = prev;
6714 }
6715 }
6716 while (list-- != htab->input_list);
6717 free (htab->input_list);
6718 #undef PREV_SEC
6719 }
6720
6721 /* Determine and set the size of the stub section for a final link.
6722
6723 The basic idea here is to examine all the relocations looking for
6724 PC-relative calls to a target that is unreachable with a "bl"
6725 instruction. */
6726
6727 bfd_boolean
6728 ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size,
6729 add_stub_section, layout_sections_again)
6730 bfd *output_bfd;
6731 bfd *stub_bfd;
6732 struct bfd_link_info *info;
6733 bfd_signed_vma group_size;
6734 asection * (*add_stub_section) PARAMS ((const char *, asection *));
6735 void (*layout_sections_again) PARAMS ((void));
6736 {
6737 bfd_size_type stub_group_size;
6738 bfd_boolean stubs_always_before_branch;
6739 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6740
6741 /* Stash our params away. */
6742 htab->stub_bfd = stub_bfd;
6743 htab->add_stub_section = add_stub_section;
6744 htab->layout_sections_again = layout_sections_again;
6745 stubs_always_before_branch = group_size < 0;
6746 if (group_size < 0)
6747 stub_group_size = -group_size;
6748 else
6749 stub_group_size = group_size;
6750 if (stub_group_size == 1)
6751 {
6752 /* Default values. */
6753 if (stubs_always_before_branch)
6754 {
6755 stub_group_size = 0x1e00000;
6756 if (htab->has_14bit_branch)
6757 stub_group_size = 0x7800;
6758 }
6759 else
6760 {
6761 stub_group_size = 0x1c00000;
6762 if (htab->has_14bit_branch)
6763 stub_group_size = 0x7000;
6764 }
6765 }
6766
6767 group_sections (htab, stub_group_size, stubs_always_before_branch);
6768
6769 while (1)
6770 {
6771 bfd *input_bfd;
6772 unsigned int bfd_indx;
6773 asection *stub_sec;
6774 bfd_boolean stub_changed;
6775
6776 htab->stub_iteration += 1;
6777 stub_changed = FALSE;
6778
6779 for (input_bfd = info->input_bfds, bfd_indx = 0;
6780 input_bfd != NULL;
6781 input_bfd = input_bfd->link_next, bfd_indx++)
6782 {
6783 Elf_Internal_Shdr *symtab_hdr;
6784 asection *section;
6785 Elf_Internal_Sym *local_syms = NULL;
6786
6787 /* We'll need the symbol table in a second. */
6788 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6789 if (symtab_hdr->sh_info == 0)
6790 continue;
6791
6792 /* Walk over each section attached to the input bfd. */
6793 for (section = input_bfd->sections;
6794 section != NULL;
6795 section = section->next)
6796 {
6797 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6798
6799 /* If there aren't any relocs, then there's nothing more
6800 to do. */
6801 if ((section->flags & SEC_RELOC) == 0
6802 || section->reloc_count == 0)
6803 continue;
6804
6805 /* If this section is a link-once section that will be
6806 discarded, then don't create any stubs. */
6807 if (section->output_section == NULL
6808 || section->output_section->owner != output_bfd)
6809 continue;
6810
6811 /* Get the relocs. */
6812 internal_relocs
6813 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
6814 (Elf_Internal_Rela *) NULL,
6815 info->keep_memory);
6816 if (internal_relocs == NULL)
6817 goto error_ret_free_local;
6818
6819 /* Now examine each relocation. */
6820 irela = internal_relocs;
6821 irelaend = irela + section->reloc_count;
6822 for (; irela < irelaend; irela++)
6823 {
6824 unsigned int r_type, r_indx;
6825 enum ppc_stub_type stub_type;
6826 struct ppc_stub_hash_entry *stub_entry;
6827 asection *sym_sec;
6828 bfd_vma sym_value;
6829 bfd_vma destination;
6830 struct ppc_link_hash_entry *hash;
6831 struct elf_link_hash_entry *h;
6832 Elf_Internal_Sym *sym;
6833 char *stub_name;
6834 const asection *id_sec;
6835
6836 r_type = ELF64_R_TYPE (irela->r_info);
6837 r_indx = ELF64_R_SYM (irela->r_info);
6838
6839 if (r_type >= (unsigned int) R_PPC64_max)
6840 {
6841 bfd_set_error (bfd_error_bad_value);
6842 goto error_ret_free_internal;
6843 }
6844
6845 /* Only look for stubs on branch instructions. */
6846 if (r_type != (unsigned int) R_PPC64_REL24
6847 && r_type != (unsigned int) R_PPC64_REL14
6848 && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN
6849 && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN)
6850 continue;
6851
6852 /* Now determine the call target, its name, value,
6853 section. */
6854 destination = 0;
6855 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6856 r_indx, input_bfd))
6857 goto error_ret_free_internal;
6858 hash = (struct ppc_link_hash_entry *) h;
6859
6860 if (hash == NULL)
6861 {
6862 /* It's a local symbol. */
6863 sym_value = sym->st_value;
6864 destination = (sym_value + irela->r_addend
6865 + sym_sec->output_offset
6866 + sym_sec->output_section->vma);
6867 }
6868 else
6869 {
6870 /* It's an external symbol. */
6871 sym_value = 0;
6872 if (hash->elf.root.type == bfd_link_hash_defined
6873 || hash->elf.root.type == bfd_link_hash_defweak)
6874 {
6875 sym_value = hash->elf.root.u.def.value;
6876 if (sym_sec->output_section != NULL)
6877 destination = (sym_value + irela->r_addend
6878 + sym_sec->output_offset
6879 + sym_sec->output_section->vma);
6880 }
6881 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6882 ;
6883 else if (hash->elf.root.type == bfd_link_hash_undefined)
6884 ;
6885 else
6886 {
6887 bfd_set_error (bfd_error_bad_value);
6888 goto error_ret_free_internal;
6889 }
6890 }
6891
6892 /* Determine what (if any) linker stub is needed. */
6893 stub_type = ppc_type_of_stub (section, irela, &hash,
6894 destination);
6895
6896 if (stub_type != ppc_stub_plt_call)
6897 {
6898 /* Check whether we need a TOC adjusting stub.
6899 Since the linker pastes together pieces from
6900 different object files when creating the
6901 _init and _fini functions, it may be that a
6902 call to what looks like a local sym is in
6903 fact a call needing a TOC adjustment. */
6904 if (sym_sec != NULL
6905 && sym_sec->output_section != NULL
6906 && (htab->stub_group[sym_sec->id].toc_off
6907 != htab->stub_group[section->id].toc_off))
6908 stub_type = ppc_stub_long_branch_r2off;
6909 }
6910
6911 if (stub_type == ppc_stub_none)
6912 continue;
6913
6914 /* __tls_get_addr calls might be eliminated. */
6915 if (stub_type != ppc_stub_plt_call
6916 && hash != NULL
6917 && &hash->elf == htab->tls_get_addr
6918 && section->has_tls_reloc
6919 && irela != internal_relocs)
6920 {
6921 /* Get tls info. */
6922 char *tls_mask;
6923
6924 if (!get_tls_mask (&tls_mask, &local_syms,
6925 irela - 1, input_bfd))
6926 goto error_ret_free_internal;
6927 if (*tls_mask != 0)
6928 continue;
6929 }
6930
6931 /* Support for grouping stub sections. */
6932 id_sec = htab->stub_group[section->id].link_sec;
6933
6934 /* Get the name of this stub. */
6935 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
6936 if (!stub_name)
6937 goto error_ret_free_internal;
6938
6939 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
6940 stub_name, FALSE, FALSE);
6941 if (stub_entry != NULL)
6942 {
6943 /* The proper stub has already been created. */
6944 free (stub_name);
6945 continue;
6946 }
6947
6948 stub_entry = ppc_add_stub (stub_name, section, htab);
6949 if (stub_entry == NULL)
6950 {
6951 free (stub_name);
6952 error_ret_free_internal:
6953 if (elf_section_data (section)->relocs == NULL)
6954 free (internal_relocs);
6955 error_ret_free_local:
6956 if (local_syms != NULL
6957 && (symtab_hdr->contents
6958 != (unsigned char *) local_syms))
6959 free (local_syms);
6960 return FALSE;
6961 }
6962
6963 stub_entry->stub_type = stub_type;
6964 stub_entry->target_value = sym_value;
6965 stub_entry->target_section = sym_sec;
6966 stub_entry->h = hash;
6967 stub_entry->addend = irela->r_addend;
6968 stub_changed = TRUE;
6969 }
6970
6971 /* We're done with the internal relocs, free them. */
6972 if (elf_section_data (section)->relocs != internal_relocs)
6973 free (internal_relocs);
6974 }
6975
6976 if (local_syms != NULL
6977 && symtab_hdr->contents != (unsigned char *) local_syms)
6978 {
6979 if (!info->keep_memory)
6980 free (local_syms);
6981 else
6982 symtab_hdr->contents = (unsigned char *) local_syms;
6983 }
6984 }
6985
6986 if (!stub_changed)
6987 break;
6988
6989 /* OK, we've added some stubs. Find out the new size of the
6990 stub sections. */
6991 for (stub_sec = htab->stub_bfd->sections;
6992 stub_sec != NULL;
6993 stub_sec = stub_sec->next)
6994 {
6995 stub_sec->_raw_size = 0;
6996 stub_sec->_cooked_size = 0;
6997 }
6998 htab->sbrlt->_raw_size = 0;
6999 htab->sbrlt->_cooked_size = 0;
7000
7001 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
7002
7003 /* Ask the linker to do its stuff. */
7004 (*htab->layout_sections_again) ();
7005 }
7006
7007 /* It would be nice to strip .branch_lt from the output if the
7008 section is empty, but it's too late. If we strip sections here,
7009 the dynamic symbol table is corrupted since the section symbol
7010 for the stripped section isn't written. */
7011
7012 return TRUE;
7013 }
7014
7015 /* Called after we have determined section placement. If sections
7016 move, we'll be called again. Provide a value for TOCstart. */
7017
7018 bfd_vma
7019 ppc64_elf_toc (obfd)
7020 bfd *obfd;
7021 {
7022 asection *s;
7023 bfd_vma TOCstart;
7024
7025 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7026 order. The TOC starts where the first of these sections starts. */
7027 s = bfd_get_section_by_name (obfd, ".got");
7028 if (s == NULL)
7029 s = bfd_get_section_by_name (obfd, ".toc");
7030 if (s == NULL)
7031 s = bfd_get_section_by_name (obfd, ".tocbss");
7032 if (s == NULL)
7033 s = bfd_get_section_by_name (obfd, ".plt");
7034 if (s == NULL)
7035 {
7036 /* This may happen for
7037 o references to TOC base (SYM@toc / TOC[tc0]) without a
7038 .toc directive
7039 o bad linker script
7040 o --gc-sections and empty TOC sections
7041
7042 FIXME: Warn user? */
7043
7044 /* Look for a likely section. We probably won't even be
7045 using TOCstart. */
7046 for (s = obfd->sections; s != NULL; s = s->next)
7047 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7048 == (SEC_ALLOC | SEC_SMALL_DATA))
7049 break;
7050 if (s == NULL)
7051 for (s = obfd->sections; s != NULL; s = s->next)
7052 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7053 == (SEC_ALLOC | SEC_SMALL_DATA))
7054 break;
7055 if (s == NULL)
7056 for (s = obfd->sections; s != NULL; s = s->next)
7057 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7058 break;
7059 if (s == NULL)
7060 for (s = obfd->sections; s != NULL; s = s->next)
7061 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7062 break;
7063 }
7064
7065 TOCstart = 0;
7066 if (s != NULL)
7067 TOCstart = s->output_section->vma + s->output_offset;
7068
7069 return TOCstart;
7070 }
7071
7072 /* Build all the stubs associated with the current output file.
7073 The stubs are kept in a hash table attached to the main linker
7074 hash table. This function is called via gldelf64ppc_finish. */
7075
7076 bfd_boolean
7077 ppc64_elf_build_stubs (emit_stub_syms, info)
7078 bfd_boolean emit_stub_syms;
7079 struct bfd_link_info *info;
7080 {
7081 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7082 asection *stub_sec;
7083 bfd_byte *p;
7084
7085 htab->emit_stub_syms = emit_stub_syms;
7086 for (stub_sec = htab->stub_bfd->sections;
7087 stub_sec != NULL;
7088 stub_sec = stub_sec->next)
7089 {
7090 bfd_size_type size;
7091
7092 /* Allocate memory to hold the linker stubs. */
7093 size = stub_sec->_raw_size;
7094 if (size != 0)
7095 {
7096 stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
7097 if (stub_sec->contents == NULL)
7098 return FALSE;
7099 }
7100 stub_sec->_cooked_size = 0;
7101 }
7102
7103 if (htab->splt != NULL)
7104 {
7105 unsigned int indx;
7106 bfd_vma plt0;
7107
7108 /* Build the .glink plt call stub. */
7109 plt0 = (htab->splt->output_section->vma
7110 + htab->splt->output_offset
7111 - (htab->sglink->output_section->vma
7112 + htab->sglink->output_offset
7113 + GLINK_CALL_STUB_SIZE));
7114 if (plt0 + 0x80008000 > 0xffffffff)
7115 {
7116 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7117 bfd_set_error (bfd_error_bad_value);
7118 return FALSE;
7119 }
7120
7121 p = htab->sglink->contents;
7122 bfd_put_32 (htab->sglink->owner, MFCTR_R12, p);
7123 p += 4;
7124 bfd_put_32 (htab->sglink->owner, SLDI_R11_R0_3, p);
7125 p += 4;
7126 bfd_put_32 (htab->sglink->owner, ADDIC_R2_R0_32K, p);
7127 p += 4;
7128 bfd_put_32 (htab->sglink->owner, SUB_R12_R12_R11, p);
7129 p += 4;
7130 bfd_put_32 (htab->sglink->owner, SRADI_R2_R2_63, p);
7131 p += 4;
7132 bfd_put_32 (htab->sglink->owner, SLDI_R11_R0_2, p);
7133 p += 4;
7134 bfd_put_32 (htab->sglink->owner, AND_R2_R2_R11, p);
7135 p += 4;
7136 bfd_put_32 (htab->sglink->owner, SUB_R12_R12_R11, p);
7137 p += 4;
7138 bfd_put_32 (htab->sglink->owner, ADD_R12_R12_R2, p);
7139 p += 4;
7140 bfd_put_32 (htab->sglink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7141 p += 4;
7142 bfd_put_32 (htab->sglink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7143 p += 4;
7144 bfd_put_32 (htab->sglink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7145 p += 4;
7146 bfd_put_32 (htab->sglink->owner, LD_R2_0R12 | 8, p);
7147 p += 4;
7148 bfd_put_32 (htab->sglink->owner, MTCTR_R11, p);
7149 p += 4;
7150 bfd_put_32 (htab->sglink->owner, LD_R11_0R12 | 16, p);
7151 p += 4;
7152 bfd_put_32 (htab->sglink->owner, BCTR, p);
7153 p += 4;
7154
7155 /* Build the .glink lazy link call stubs. */
7156 indx = 0;
7157 while (p < htab->sglink->contents + htab->sglink->_raw_size)
7158 {
7159 if (indx < 0x8000)
7160 {
7161 bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p);
7162 p += 4;
7163 }
7164 else
7165 {
7166 bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p);
7167 p += 4;
7168 bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7169 p += 4;
7170 }
7171 bfd_put_32 (htab->sglink->owner,
7172 B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p);
7173 indx++;
7174 p += 4;
7175 }
7176 htab->sglink->_cooked_size = p - htab->sglink->contents;
7177 }
7178
7179 if (htab->sbrlt->_raw_size != 0)
7180 {
7181 htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
7182 htab->sbrlt->_raw_size);
7183 if (htab->sbrlt->contents == NULL)
7184 return FALSE;
7185 }
7186
7187 /* Build the stubs as directed by the stub hash table. */
7188 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7189
7190 for (stub_sec = htab->stub_bfd->sections;
7191 stub_sec != NULL;
7192 stub_sec = stub_sec->next)
7193 {
7194 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7195 break;
7196 }
7197
7198 if (stub_sec != NULL
7199 || htab->sglink->_raw_size != htab->sglink->_cooked_size)
7200 {
7201 htab->stub_error = TRUE;
7202 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7203 }
7204
7205 return !htab->stub_error;
7206 }
7207
7208 /* The RELOCATE_SECTION function is called by the ELF backend linker
7209 to handle the relocations for a section.
7210
7211 The relocs are always passed as Rela structures; if the section
7212 actually uses Rel structures, the r_addend field will always be
7213 zero.
7214
7215 This function is responsible for adjust the section contents as
7216 necessary, and (if using Rela relocs and generating a
7217 relocateable output file) adjusting the reloc addend as
7218 necessary.
7219
7220 This function does not have to worry about setting the reloc
7221 address or the reloc symbol index.
7222
7223 LOCAL_SYMS is a pointer to the swapped in local symbols.
7224
7225 LOCAL_SECTIONS is an array giving the section in the input file
7226 corresponding to the st_shndx field of each local symbol.
7227
7228 The global hash table entry for the global symbols can be found
7229 via elf_sym_hashes (input_bfd).
7230
7231 When generating relocateable output, this function must handle
7232 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7233 going to be the section symbol corresponding to the output
7234 section, which means that the addend must be adjusted
7235 accordingly. */
7236
7237 static bfd_boolean
7238 ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
7239 contents, relocs, local_syms, local_sections)
7240 bfd *output_bfd;
7241 struct bfd_link_info *info;
7242 bfd *input_bfd;
7243 asection *input_section;
7244 bfd_byte *contents;
7245 Elf_Internal_Rela *relocs;
7246 Elf_Internal_Sym *local_syms;
7247 asection **local_sections;
7248 {
7249 struct ppc_link_hash_table *htab;
7250 Elf_Internal_Shdr *symtab_hdr;
7251 struct elf_link_hash_entry **sym_hashes;
7252 Elf_Internal_Rela *rel;
7253 Elf_Internal_Rela *relend;
7254 Elf_Internal_Rela outrel;
7255 bfd_byte *loc;
7256 struct got_entry **local_got_ents;
7257 bfd_vma TOCstart;
7258 bfd_boolean ret = TRUE;
7259 bfd_boolean is_opd;
7260 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7261 bfd_boolean is_power4 = FALSE;
7262
7263 if (info->relocateable)
7264 return TRUE;
7265
7266 /* Initialize howto table if needed. */
7267 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7268 ppc_howto_init ();
7269
7270 htab = ppc_hash_table (info);
7271 local_got_ents = elf_local_got_ents (input_bfd);
7272 TOCstart = elf_gp (output_bfd);
7273 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7274 sym_hashes = elf_sym_hashes (input_bfd);
7275 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7276
7277 rel = relocs;
7278 relend = relocs + input_section->reloc_count;
7279 for (; rel < relend; rel++)
7280 {
7281 enum elf_ppc64_reloc_type r_type;
7282 bfd_vma addend;
7283 bfd_reloc_status_type r;
7284 Elf_Internal_Sym *sym;
7285 asection *sec;
7286 struct elf_link_hash_entry *h;
7287 struct elf_link_hash_entry *fdh;
7288 const char *sym_name;
7289 unsigned long r_symndx;
7290 char tls_mask, tls_gd, tls_type;
7291 bfd_vma relocation;
7292 bfd_boolean unresolved_reloc;
7293 bfd_boolean warned;
7294 long insn, mask;
7295 struct ppc_stub_hash_entry *stub_entry;
7296 bfd_vma max_br_offset;
7297 bfd_vma from;
7298
7299 r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
7300 r_symndx = ELF64_R_SYM (rel->r_info);
7301 sym = (Elf_Internal_Sym *) 0;
7302 sec = (asection *) 0;
7303 h = (struct elf_link_hash_entry *) 0;
7304 sym_name = (const char *) 0;
7305 unresolved_reloc = FALSE;
7306 warned = FALSE;
7307
7308 if (r_type == R_PPC64_TOC)
7309 {
7310 /* Relocation value is TOC base. */
7311 relocation = TOCstart + htab->stub_group[input_section->id].toc_off;
7312 }
7313 else if (r_symndx < symtab_hdr->sh_info)
7314 {
7315 /* It's a local symbol. */
7316 sym = local_syms + r_symndx;
7317 sec = local_sections[r_symndx];
7318 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7319 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
7320 if (elf_section_data (sec) != NULL)
7321 {
7322 long *opd_sym_adjust;
7323
7324 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7325 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
7326 relocation += opd_sym_adjust[sym->st_value / 24];
7327 }
7328 }
7329 else
7330 {
7331 /* It's a global symbol. */
7332 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7333 while (h->root.type == bfd_link_hash_indirect
7334 || h->root.type == bfd_link_hash_warning)
7335 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7336 sym_name = h->root.root.string;
7337 relocation = 0;
7338 if (h->root.type == bfd_link_hash_defined
7339 || h->root.type == bfd_link_hash_defweak)
7340 {
7341 sec = h->root.u.def.section;
7342 if (sec->output_section == NULL)
7343 /* Set a flag that will be cleared later if we find a
7344 relocation value for this symbol. output_section
7345 is typically NULL for symbols satisfied by a shared
7346 library. */
7347 unresolved_reloc = TRUE;
7348 else
7349 relocation = (h->root.u.def.value
7350 + sec->output_section->vma
7351 + sec->output_offset);
7352 }
7353 else if (h->root.type == bfd_link_hash_undefweak)
7354 ;
7355 else if (info->shared
7356 && !info->no_undefined
7357 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
7358 ;
7359 else
7360 {
7361 if (! ((*info->callbacks->undefined_symbol)
7362 (info, h->root.root.string, input_bfd, input_section,
7363 rel->r_offset, (!info->shared
7364 || info->no_undefined
7365 || ELF_ST_VISIBILITY (h->other)))))
7366 return FALSE;
7367 warned = TRUE;
7368 }
7369 }
7370
7371 /* TLS optimizations. Replace instruction sequences and relocs
7372 based on information we collected in tls_optimize. We edit
7373 RELOCS so that --emit-relocs will output something sensible
7374 for the final instruction stream. */
7375 tls_mask = 0;
7376 tls_gd = 0;
7377 if (IS_PPC64_TLS_RELOC (r_type))
7378 {
7379 if (h != NULL)
7380 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7381 else if (local_got_ents != NULL)
7382 {
7383 char *lgot_masks;
7384 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7385 tls_mask = lgot_masks[r_symndx];
7386 }
7387 }
7388
7389 /* Ensure reloc mapping code below stays sane. */
7390 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7391 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7392 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7393 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7394 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7395 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7396 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7397 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7398 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7399 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7400 abort ();
7401 switch (r_type)
7402 {
7403 default:
7404 break;
7405
7406 case R_PPC64_TOC16:
7407 case R_PPC64_TOC16_LO:
7408 case R_PPC64_TOC16_DS:
7409 case R_PPC64_TOC16_LO_DS:
7410 {
7411 /* Check for toc tls entries. */
7412 char *toc_tls;
7413 int retval;
7414
7415 retval = get_tls_mask (&toc_tls, &local_syms, rel, input_bfd);
7416 if (retval == 0)
7417 return FALSE;
7418
7419 if (toc_tls)
7420 {
7421 tls_mask = *toc_tls;
7422 if (r_type == R_PPC64_TOC16_DS
7423 || r_type == R_PPC64_TOC16_LO_DS)
7424 {
7425 if (tls_mask != 0
7426 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7427 goto toctprel;
7428 }
7429 else
7430 {
7431 /* If we found a GD reloc pair, then we might be
7432 doing a GD->IE transition. */
7433 if (retval == 2)
7434 {
7435 tls_gd = TLS_TPRELGD;
7436 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7437 goto tls_get_addr_check;
7438 }
7439 else if (retval == 3)
7440 {
7441 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7442 goto tls_get_addr_check;
7443 }
7444 }
7445 }
7446 }
7447 break;
7448
7449 case R_PPC64_GOT_TPREL16_DS:
7450 case R_PPC64_GOT_TPREL16_LO_DS:
7451 if (tls_mask != 0
7452 && (tls_mask & TLS_TPREL) == 0)
7453 {
7454 bfd_vma insn;
7455 toctprel:
7456 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7457 insn &= 31 << 21;
7458 insn |= 0x3c0d0000; /* addis 0,13,0 */
7459 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7460 r_type = R_PPC64_TPREL16_HA;
7461 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7462 }
7463 break;
7464
7465 case R_PPC64_TLS:
7466 if (tls_mask == 0)
7467 {
7468 /* Check for toc tls entries. */
7469 char *toc_tls;
7470
7471 if (!get_tls_mask (&toc_tls, &local_syms, rel, input_bfd))
7472 return FALSE;
7473
7474 if (toc_tls)
7475 tls_mask = *toc_tls;
7476 }
7477 if (tls_mask != 0
7478 && (tls_mask & TLS_TPREL) == 0)
7479 {
7480 bfd_vma insn, rtra;
7481 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7482 if ((insn & ((31 << 26) | (31 << 11)))
7483 == ((31 << 26) | (13 << 11)))
7484 rtra = insn & ((1 << 26) - (1 << 16));
7485 else if ((insn & ((31 << 26) | (31 << 16)))
7486 == ((31 << 26) | (13 << 16)))
7487 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7488 else
7489 abort ();
7490 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7491 /* add -> addi. */
7492 insn = 14 << 26;
7493 else if ((insn & (31 << 1)) == 23 << 1
7494 && ((insn & (31 << 6)) < 14 << 6
7495 || ((insn & (31 << 6)) >= 16 << 6
7496 && (insn & (31 << 6)) < 24 << 6)))
7497 /* load and store indexed -> dform. */
7498 insn = (32 | ((insn >> 6) & 31)) << 26;
7499 else if ((insn & (31 << 1)) == 21 << 1
7500 && (insn & (0x1a << 6)) == 0)
7501 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7502 insn = (((58 | ((insn >> 6) & 4)) << 26)
7503 | ((insn >> 6) & 1));
7504 else if ((insn & (31 << 1)) == 21 << 1
7505 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7506 /* lwax -> lwa. */
7507 insn = (58 << 26) | 2;
7508 else
7509 abort ();
7510 insn |= rtra;
7511 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7512 r_type = R_PPC64_TPREL16_LO;
7513 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7514 /* Was PPC64_TLS which sits on insn boundary, now
7515 PPC64_TPREL16_LO which is at insn+2. */
7516 rel->r_offset += 2;
7517 }
7518 break;
7519
7520 case R_PPC64_GOT_TLSGD16_HI:
7521 case R_PPC64_GOT_TLSGD16_HA:
7522 tls_gd = TLS_TPRELGD;
7523 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7524 goto tls_gdld_hi;
7525 break;
7526
7527 case R_PPC64_GOT_TLSLD16_HI:
7528 case R_PPC64_GOT_TLSLD16_HA:
7529 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7530 {
7531 tls_gdld_hi:
7532 if ((tls_mask & tls_gd) != 0)
7533 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7534 + R_PPC64_GOT_TPREL16_DS);
7535 else
7536 {
7537 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7538 rel->r_offset -= 2;
7539 r_type = R_PPC64_NONE;
7540 }
7541 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7542 }
7543 break;
7544
7545 case R_PPC64_GOT_TLSGD16:
7546 case R_PPC64_GOT_TLSGD16_LO:
7547 tls_gd = TLS_TPRELGD;
7548 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7549 goto tls_get_addr_check;
7550 break;
7551
7552 case R_PPC64_GOT_TLSLD16:
7553 case R_PPC64_GOT_TLSLD16_LO:
7554 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7555 {
7556 tls_get_addr_check:
7557 if (rel + 1 < relend)
7558 {
7559 enum elf_ppc64_reloc_type r_type2;
7560 unsigned long r_symndx2;
7561 struct elf_link_hash_entry *h2;
7562 bfd_vma insn1, insn2, insn3;
7563 bfd_vma offset;
7564
7565 /* The next instruction should be a call to
7566 __tls_get_addr. Peek at the reloc to be sure. */
7567 r_type2
7568 = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel[1].r_info);
7569 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7570 if (r_symndx2 < symtab_hdr->sh_info
7571 || (r_type2 != R_PPC64_REL14
7572 && r_type2 != R_PPC64_REL14_BRTAKEN
7573 && r_type2 != R_PPC64_REL14_BRNTAKEN
7574 && r_type2 != R_PPC64_REL24))
7575 break;
7576
7577 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7578 while (h2->root.type == bfd_link_hash_indirect
7579 || h2->root.type == bfd_link_hash_warning)
7580 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7581 if (h2 == NULL || h2 != htab->tls_get_addr)
7582 break;
7583
7584 /* OK, it checks out. Replace the call. */
7585 offset = rel[1].r_offset;
7586 insn1 = bfd_get_32 (output_bfd,
7587 contents + rel->r_offset - 2);
7588 insn3 = bfd_get_32 (output_bfd,
7589 contents + offset + 4);
7590 if ((tls_mask & tls_gd) != 0)
7591 {
7592 /* IE */
7593 insn1 &= (1 << 26) - (1 << 2);
7594 insn1 |= 58 << 26; /* ld */
7595 insn2 = 0x7c636a14; /* add 3,3,13 */
7596 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7597 if ((tls_mask & TLS_EXPLICIT) == 0)
7598 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7599 + R_PPC64_GOT_TPREL16_DS);
7600 else
7601 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7602 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7603 }
7604 else
7605 {
7606 /* LE */
7607 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7608 insn2 = 0x38630000; /* addi 3,3,0 */
7609 if (tls_gd == 0)
7610 {
7611 /* Was an LD reloc. */
7612 r_symndx = 0;
7613 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
7614 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
7615 }
7616 r_type = R_PPC64_TPREL16_HA;
7617 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7618 rel[1].r_info = ELF64_R_INFO (r_symndx,
7619 R_PPC64_TPREL16_LO);
7620 rel[1].r_offset += 2;
7621 }
7622 if (insn3 == NOP
7623 || insn3 == CROR_151515 || insn3 == CROR_313131)
7624 {
7625 insn3 = insn2;
7626 insn2 = NOP;
7627 rel[1].r_offset += 4;
7628 }
7629 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7630 bfd_put_32 (output_bfd, insn2, contents + offset);
7631 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7632 if (tls_gd == 0)
7633 {
7634 /* We changed the symbol on an LD reloc. Start over
7635 in order to get h, sym, sec etc. right. */
7636 rel--;
7637 continue;
7638 }
7639 }
7640 }
7641 break;
7642
7643 case R_PPC64_DTPMOD64:
7644 if (rel + 1 < relend
7645 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7646 && rel[1].r_offset == rel->r_offset + 8)
7647 {
7648 if ((tls_mask & TLS_GD) == 0)
7649 {
7650 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7651 if ((tls_mask & TLS_TPRELGD) != 0)
7652 r_type = R_PPC64_TPREL64;
7653 else
7654 {
7655 bfd_put_64 (output_bfd, (bfd_vma) 1,
7656 contents + rel->r_offset);
7657 r_type = R_PPC64_NONE;
7658 }
7659 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7660 }
7661 }
7662 else
7663 {
7664 if ((tls_mask & TLS_LD) == 0)
7665 {
7666 bfd_put_64 (output_bfd, (bfd_vma) 1,
7667 contents + rel->r_offset);
7668 r_type = R_PPC64_NONE;
7669 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7670 }
7671 }
7672 break;
7673
7674 case R_PPC64_TPREL64:
7675 if ((tls_mask & TLS_TPREL) == 0)
7676 {
7677 r_type = R_PPC64_NONE;
7678 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7679 }
7680 break;
7681 }
7682
7683 /* Handle other relocations that tweak non-addend part of insn. */
7684 insn = 0;
7685 switch (r_type)
7686 {
7687 default:
7688 break;
7689
7690 /* Branch taken prediction relocations. */
7691 case R_PPC64_ADDR14_BRTAKEN:
7692 case R_PPC64_REL14_BRTAKEN:
7693 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7694 /* Fall thru. */
7695
7696 /* Branch not taken prediction relocations. */
7697 case R_PPC64_ADDR14_BRNTAKEN:
7698 case R_PPC64_REL14_BRNTAKEN:
7699 insn |= bfd_get_32 (output_bfd,
7700 contents + rel->r_offset) & ~(0x01 << 21);
7701 if (is_power4)
7702 {
7703 /* Set 'a' bit. This is 0b00010 in BO field for branch
7704 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7705 for branch on CTR insns (BO == 1a00t or 1a01t). */
7706 if ((insn & (0x14 << 21)) == (0x04 << 21))
7707 insn |= 0x02 << 21;
7708 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7709 insn |= 0x08 << 21;
7710 else
7711 break;
7712 }
7713 else
7714 {
7715 from = (rel->r_offset
7716 + input_section->output_offset
7717 + input_section->output_section->vma);
7718
7719 /* Invert 'y' bit if not the default. */
7720 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7721 insn ^= 0x01 << 21;
7722 }
7723
7724 bfd_put_32 (output_bfd, (bfd_vma) insn, contents + rel->r_offset);
7725 break;
7726
7727 case R_PPC64_REL24:
7728 /* Calls to functions with a different TOC, such as calls to
7729 shared objects, need to alter the TOC pointer. This is
7730 done using a linkage stub. A REL24 branching to these
7731 linkage stubs needs to be followed by a nop, as the nop
7732 will be replaced with an instruction to restore the TOC
7733 base pointer. */
7734 if (((h != NULL
7735 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7736 && fdh->plt.plist != NULL)
7737 || ((fdh = h, sec) != NULL
7738 && sec->output_section != NULL
7739 && (htab->stub_group[sec->id].toc_off
7740 != htab->stub_group[input_section->id].toc_off)))
7741 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7742 rel, htab)) != NULL
7743 && (stub_entry->stub_type == ppc_stub_plt_call
7744 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7745 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7746 {
7747 bfd_boolean can_plt_call = 0;
7748
7749 if (rel->r_offset + 8 <= input_section->_cooked_size)
7750 {
7751 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7752 if (insn == NOP
7753 || insn == CROR_151515 || insn == CROR_313131)
7754 {
7755 bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1,
7756 contents + rel->r_offset + 4);
7757 can_plt_call = 1;
7758 }
7759 }
7760
7761 if (!can_plt_call)
7762 {
7763 if (stub_entry->stub_type == ppc_stub_plt_call)
7764 {
7765 /* If this is a plain branch rather than a branch
7766 and link, don't require a nop. */
7767 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7768 if ((insn & 1) == 0)
7769 can_plt_call = 1;
7770 }
7771 else
7772 {
7773 if (strcmp (input_section->output_section->name,
7774 ".init") == 0
7775 || strcmp (input_section->output_section->name,
7776 ".fini") == 0)
7777 (*_bfd_error_handler)
7778 (_("%s(%s+0x%lx): automatic multiple TOCs "
7779 "not supported using your crt files; "
7780 "recompile with -mminimal-toc or upgrade gcc"),
7781 bfd_archive_filename (input_bfd),
7782 input_section->name,
7783 (long) rel->r_offset);
7784 else
7785 (*_bfd_error_handler)
7786 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7787 "does not allow automatic multiple TOCs; "
7788 "recompile with -mminimal-toc or "
7789 "-fno-optimize-sibling-calls, "
7790 "or make `%s' extern"),
7791 bfd_archive_filename (input_bfd),
7792 input_section->name,
7793 (long) rel->r_offset,
7794 sym_name,
7795 sym_name);
7796 bfd_set_error (bfd_error_bad_value);
7797 ret = FALSE;
7798 }
7799 }
7800
7801 if (can_plt_call)
7802 {
7803 relocation = (stub_entry->stub_offset
7804 + stub_entry->stub_sec->output_offset
7805 + stub_entry->stub_sec->output_section->vma);
7806 if (stub_entry->stub_type == ppc_stub_plt_call)
7807 unresolved_reloc = FALSE;
7808 }
7809 }
7810
7811 if (h != NULL
7812 && h->root.type == bfd_link_hash_undefweak
7813 && relocation == 0
7814 && rel->r_addend == 0)
7815 {
7816 /* Tweak calls to undefined weak functions to point at a
7817 blr. We can thus call a weak function without first
7818 checking whether the function is defined. We have a
7819 blr at the end of .sfpr. */
7820 BFD_ASSERT (htab->sfpr->_raw_size != 0);
7821 relocation = (htab->sfpr->_raw_size - 4
7822 + htab->sfpr->output_offset
7823 + htab->sfpr->output_section->vma);
7824 from = (rel->r_offset
7825 + input_section->output_offset
7826 + input_section->output_section->vma);
7827
7828 /* But let's not be silly about it. If the blr isn't in
7829 reach, just go to the next instruction. */
7830 if (relocation - from + (1 << 25) >= (1 << 26)
7831 || htab->sfpr->_raw_size == 0)
7832 relocation = from + 4;
7833 }
7834 break;
7835 }
7836
7837 /* Set `addend'. */
7838 tls_type = 0;
7839 addend = rel->r_addend;
7840 switch (r_type)
7841 {
7842 default:
7843 (*_bfd_error_handler)
7844 (_("%s: unknown relocation type %d for symbol %s"),
7845 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
7846
7847 bfd_set_error (bfd_error_bad_value);
7848 ret = FALSE;
7849 continue;
7850
7851 case R_PPC64_NONE:
7852 case R_PPC64_TLS:
7853 case R_PPC64_GNU_VTINHERIT:
7854 case R_PPC64_GNU_VTENTRY:
7855 continue;
7856
7857 /* GOT16 relocations. Like an ADDR16 using the symbol's
7858 address in the GOT as relocation value instead of the
7859 symbol's value itself. Also, create a GOT entry for the
7860 symbol and put the symbol value there. */
7861 case R_PPC64_GOT_TLSGD16:
7862 case R_PPC64_GOT_TLSGD16_LO:
7863 case R_PPC64_GOT_TLSGD16_HI:
7864 case R_PPC64_GOT_TLSGD16_HA:
7865 tls_type = TLS_TLS | TLS_GD;
7866 goto dogot;
7867
7868 case R_PPC64_GOT_TLSLD16:
7869 case R_PPC64_GOT_TLSLD16_LO:
7870 case R_PPC64_GOT_TLSLD16_HI:
7871 case R_PPC64_GOT_TLSLD16_HA:
7872 tls_type = TLS_TLS | TLS_LD;
7873 goto dogot;
7874
7875 case R_PPC64_GOT_TPREL16_DS:
7876 case R_PPC64_GOT_TPREL16_LO_DS:
7877 case R_PPC64_GOT_TPREL16_HI:
7878 case R_PPC64_GOT_TPREL16_HA:
7879 tls_type = TLS_TLS | TLS_TPREL;
7880 goto dogot;
7881
7882 case R_PPC64_GOT_DTPREL16_DS:
7883 case R_PPC64_GOT_DTPREL16_LO_DS:
7884 case R_PPC64_GOT_DTPREL16_HI:
7885 case R_PPC64_GOT_DTPREL16_HA:
7886 tls_type = TLS_TLS | TLS_DTPREL;
7887 goto dogot;
7888
7889 case R_PPC64_GOT16:
7890 case R_PPC64_GOT16_LO:
7891 case R_PPC64_GOT16_HI:
7892 case R_PPC64_GOT16_HA:
7893 case R_PPC64_GOT16_DS:
7894 case R_PPC64_GOT16_LO_DS:
7895 dogot:
7896 {
7897 /* Relocation is to the entry for this symbol in the global
7898 offset table. */
7899 bfd_vma *offp;
7900 bfd_vma off;
7901 unsigned long indx = 0;
7902
7903 if (htab->sgot == NULL)
7904 abort ();
7905
7906 if (tls_type == (TLS_TLS | TLS_LD)
7907 && (h == NULL
7908 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
7909 offp = &htab->tlsld_got.offset;
7910 else
7911 {
7912 struct got_entry *ent;
7913
7914 if (h != NULL)
7915 {
7916 bfd_boolean dyn = htab->elf.dynamic_sections_created;
7917 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7918 || (info->shared
7919 && SYMBOL_REFERENCES_LOCAL (info, h)))
7920 /* This is actually a static link, or it is a
7921 -Bsymbolic link and the symbol is defined
7922 locally, or the symbol was forced to be local
7923 because of a version file. */
7924 ;
7925 else
7926 {
7927 indx = h->dynindx;
7928 unresolved_reloc = FALSE;
7929 }
7930 ent = h->got.glist;
7931 }
7932 else
7933 {
7934 if (local_got_ents == NULL)
7935 abort ();
7936 ent = local_got_ents[r_symndx];
7937 }
7938
7939 for (; ent != NULL; ent = ent->next)
7940 if (ent->addend == rel->r_addend
7941 && ent->tls_type == tls_type)
7942 break;
7943 if (ent == NULL)
7944 abort ();
7945 offp = &ent->got.offset;
7946 }
7947
7948 /* The offset must always be a multiple of 8. We use the
7949 least significant bit to record whether we have already
7950 processed this entry. */
7951 off = *offp;
7952 if ((off & 1) != 0)
7953 off &= ~1;
7954 else
7955 {
7956 /* Generate relocs for the dynamic linker, except in
7957 the case of TLSLD where we'll use one entry per
7958 module. */
7959 *offp = off | 1;
7960 if ((info->shared || indx != 0)
7961 && (h == NULL
7962 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7963 || h->root.type != bfd_link_hash_undefweak))
7964 {
7965 outrel.r_offset = (htab->sgot->output_section->vma
7966 + htab->sgot->output_offset
7967 + off);
7968 outrel.r_addend = rel->r_addend;
7969 if (tls_type & (TLS_LD | TLS_GD))
7970 {
7971 outrel.r_addend = 0;
7972 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
7973 if (tls_type == (TLS_TLS | TLS_GD))
7974 {
7975 loc = htab->srelgot->contents;
7976 loc += (htab->srelgot->reloc_count++
7977 * sizeof (Elf64_External_Rela));
7978 bfd_elf64_swap_reloca_out (output_bfd,
7979 &outrel, loc);
7980 outrel.r_offset += 8;
7981 outrel.r_addend = rel->r_addend;
7982 outrel.r_info
7983 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
7984 }
7985 }
7986 else if (tls_type == (TLS_TLS | TLS_DTPREL))
7987 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
7988 else if (tls_type == (TLS_TLS | TLS_TPREL))
7989 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
7990 else if (indx == 0)
7991 {
7992 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
7993
7994 /* Write the .got section contents for the sake
7995 of prelink. */
7996 loc = htab->sgot->contents + off;
7997 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
7998 loc);
7999 }
8000 else
8001 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8002
8003 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8004 {
8005 outrel.r_addend += relocation;
8006 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8007 outrel.r_addend -= htab->tls_sec->vma;
8008 }
8009 loc = htab->srelgot->contents;
8010 loc += (htab->srelgot->reloc_count++
8011 * sizeof (Elf64_External_Rela));
8012 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8013 }
8014
8015 /* Init the .got section contents here if we're not
8016 emitting a reloc. */
8017 else
8018 {
8019 relocation += rel->r_addend;
8020 if (tls_type == (TLS_TLS | TLS_LD))
8021 relocation = 1;
8022 else if (tls_type != 0)
8023 {
8024 relocation -= htab->tls_sec->vma + DTP_OFFSET;
8025 if (tls_type == (TLS_TLS | TLS_TPREL))
8026 relocation += DTP_OFFSET - TP_OFFSET;
8027
8028 if (tls_type == (TLS_TLS | TLS_GD))
8029 {
8030 bfd_put_64 (output_bfd, relocation,
8031 htab->sgot->contents + off + 8);
8032 relocation = 1;
8033 }
8034 }
8035
8036 bfd_put_64 (output_bfd, relocation,
8037 htab->sgot->contents + off);
8038 }
8039 }
8040
8041 if (off >= (bfd_vma) -2)
8042 abort ();
8043
8044 relocation = htab->sgot->output_offset + off;
8045
8046 /* TOC base (r2) is TOC start plus 0x8000. */
8047 addend = - TOC_BASE_OFF;
8048 }
8049 break;
8050
8051 case R_PPC64_PLT16_HA:
8052 case R_PPC64_PLT16_HI:
8053 case R_PPC64_PLT16_LO:
8054 case R_PPC64_PLT32:
8055 case R_PPC64_PLT64:
8056 /* Relocation is to the entry for this symbol in the
8057 procedure linkage table. */
8058
8059 /* Resolve a PLT reloc against a local symbol directly,
8060 without using the procedure linkage table. */
8061 if (h == NULL)
8062 break;
8063
8064 /* It's possible that we didn't make a PLT entry for this
8065 symbol. This happens when statically linking PIC code,
8066 or when using -Bsymbolic. Go find a match if there is a
8067 PLT entry. */
8068 if (htab->splt != NULL)
8069 {
8070 struct plt_entry *ent;
8071 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8072 if (ent->addend == rel->r_addend
8073 && ent->plt.offset != (bfd_vma) -1)
8074 {
8075 relocation = (htab->splt->output_section->vma
8076 + htab->splt->output_offset
8077 + ent->plt.offset);
8078 unresolved_reloc = FALSE;
8079 }
8080 }
8081 break;
8082
8083 /* TOC16 relocs. We want the offset relative to the TOC base,
8084 which is the address of the start of the TOC plus 0x8000.
8085 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8086 in this order. */
8087 case R_PPC64_TOC16:
8088 case R_PPC64_TOC16_LO:
8089 case R_PPC64_TOC16_HI:
8090 case R_PPC64_TOC16_DS:
8091 case R_PPC64_TOC16_LO_DS:
8092 case R_PPC64_TOC16_HA:
8093 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8094 break;
8095
8096 /* Relocate against the beginning of the section. */
8097 case R_PPC64_SECTOFF:
8098 case R_PPC64_SECTOFF_LO:
8099 case R_PPC64_SECTOFF_HI:
8100 case R_PPC64_SECTOFF_DS:
8101 case R_PPC64_SECTOFF_LO_DS:
8102 case R_PPC64_SECTOFF_HA:
8103 if (sec != (asection *) 0)
8104 addend -= sec->output_section->vma;
8105 break;
8106
8107 case R_PPC64_REL14:
8108 case R_PPC64_REL14_BRNTAKEN:
8109 case R_PPC64_REL14_BRTAKEN:
8110 case R_PPC64_REL24:
8111 break;
8112
8113 case R_PPC64_TPREL16:
8114 case R_PPC64_TPREL16_LO:
8115 case R_PPC64_TPREL16_HI:
8116 case R_PPC64_TPREL16_HA:
8117 case R_PPC64_TPREL16_DS:
8118 case R_PPC64_TPREL16_LO_DS:
8119 case R_PPC64_TPREL16_HIGHER:
8120 case R_PPC64_TPREL16_HIGHERA:
8121 case R_PPC64_TPREL16_HIGHEST:
8122 case R_PPC64_TPREL16_HIGHESTA:
8123 addend -= htab->tls_sec->vma + TP_OFFSET;
8124 if (info->shared)
8125 /* The TPREL16 relocs shouldn't really be used in shared
8126 libs as they will result in DT_TEXTREL being set, but
8127 support them anyway. */
8128 goto dodyn;
8129 break;
8130
8131 case R_PPC64_DTPREL16:
8132 case R_PPC64_DTPREL16_LO:
8133 case R_PPC64_DTPREL16_HI:
8134 case R_PPC64_DTPREL16_HA:
8135 case R_PPC64_DTPREL16_DS:
8136 case R_PPC64_DTPREL16_LO_DS:
8137 case R_PPC64_DTPREL16_HIGHER:
8138 case R_PPC64_DTPREL16_HIGHERA:
8139 case R_PPC64_DTPREL16_HIGHEST:
8140 case R_PPC64_DTPREL16_HIGHESTA:
8141 addend -= htab->tls_sec->vma + DTP_OFFSET;
8142 break;
8143
8144 case R_PPC64_DTPMOD64:
8145 relocation = 1;
8146 addend = 0;
8147 goto dodyn;
8148
8149 case R_PPC64_TPREL64:
8150 addend -= htab->tls_sec->vma + TP_OFFSET;
8151 goto dodyn;
8152
8153 case R_PPC64_DTPREL64:
8154 addend -= htab->tls_sec->vma + DTP_OFFSET;
8155 /* Fall thru */
8156
8157 /* Relocations that may need to be propagated if this is a
8158 dynamic object. */
8159 case R_PPC64_REL30:
8160 case R_PPC64_REL32:
8161 case R_PPC64_REL64:
8162 case R_PPC64_ADDR14:
8163 case R_PPC64_ADDR14_BRNTAKEN:
8164 case R_PPC64_ADDR14_BRTAKEN:
8165 case R_PPC64_ADDR16:
8166 case R_PPC64_ADDR16_DS:
8167 case R_PPC64_ADDR16_HA:
8168 case R_PPC64_ADDR16_HI:
8169 case R_PPC64_ADDR16_HIGHER:
8170 case R_PPC64_ADDR16_HIGHERA:
8171 case R_PPC64_ADDR16_HIGHEST:
8172 case R_PPC64_ADDR16_HIGHESTA:
8173 case R_PPC64_ADDR16_LO:
8174 case R_PPC64_ADDR16_LO_DS:
8175 case R_PPC64_ADDR24:
8176 case R_PPC64_ADDR32:
8177 case R_PPC64_ADDR64:
8178 case R_PPC64_UADDR16:
8179 case R_PPC64_UADDR32:
8180 case R_PPC64_UADDR64:
8181 /* r_symndx will be zero only for relocs against symbols
8182 from removed linkonce sections, or sections discarded by
8183 a linker script. */
8184 dodyn:
8185 if (r_symndx == 0)
8186 break;
8187 /* Fall thru. */
8188
8189 case R_PPC64_TOC:
8190 if ((input_section->flags & SEC_ALLOC) == 0)
8191 break;
8192
8193 if (NO_OPD_RELOCS && is_opd)
8194 break;
8195
8196 if ((info->shared
8197 && (h == NULL
8198 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8199 || h->root.type != bfd_link_hash_undefweak)
8200 && (MUST_BE_DYN_RELOC (r_type)
8201 || (h != NULL
8202 && !SYMBOL_CALLS_LOCAL (info, h))))
8203 || (ELIMINATE_COPY_RELOCS
8204 && !info->shared
8205 && h != NULL
8206 && h->dynindx != -1
8207 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8208 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8209 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8210 {
8211 Elf_Internal_Rela outrel;
8212 bfd_boolean skip, relocate;
8213 asection *sreloc;
8214 bfd_byte *loc;
8215 bfd_vma out_off;
8216
8217 /* When generating a dynamic object, these relocations
8218 are copied into the output file to be resolved at run
8219 time. */
8220
8221 skip = FALSE;
8222 relocate = FALSE;
8223
8224 out_off = _bfd_elf_section_offset (output_bfd, info,
8225 input_section, rel->r_offset);
8226 if (out_off == (bfd_vma) -1)
8227 skip = TRUE;
8228 else if (out_off == (bfd_vma) -2)
8229 skip = TRUE, relocate = TRUE;
8230 out_off += (input_section->output_section->vma
8231 + input_section->output_offset);
8232 outrel.r_offset = out_off;
8233 outrel.r_addend = rel->r_addend;
8234
8235 /* Optimize unaligned reloc use. */
8236 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8237 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8238 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8239 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8240 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8241 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8242 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8243 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8244 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8245
8246 if (skip)
8247 memset (&outrel, 0, sizeof outrel);
8248 else if (h != NULL
8249 && !SYMBOL_REFERENCES_LOCAL (info, h)
8250 && !is_opd)
8251 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8252 else
8253 {
8254 /* This symbol is local, or marked to become local,
8255 or this is an opd section reloc which must point
8256 at a local function. */
8257 outrel.r_addend += relocation;
8258 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8259 {
8260 if (is_opd && h != NULL)
8261 {
8262 /* Lie about opd entries. This case occurs
8263 when building shared libraries and we
8264 reference a function in another shared
8265 lib. The same thing happens for a weak
8266 definition in an application that's
8267 overridden by a strong definition in a
8268 shared lib. (I believe this is a generic
8269 bug in binutils handling of weak syms.)
8270 In these cases we won't use the opd
8271 entry in this lib. */
8272 unresolved_reloc = FALSE;
8273 }
8274 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8275
8276 /* We need to relocate .opd contents for ld.so.
8277 Prelink also wants simple and consistent rules
8278 for relocs. This make all RELATIVE relocs have
8279 *r_offset equal to r_addend. */
8280 relocate = TRUE;
8281 }
8282 else
8283 {
8284 long indx = 0;
8285
8286 if (bfd_is_abs_section (sec))
8287 ;
8288 else if (sec == NULL || sec->owner == NULL)
8289 {
8290 bfd_set_error (bfd_error_bad_value);
8291 return FALSE;
8292 }
8293 else
8294 {
8295 asection *osec;
8296
8297 osec = sec->output_section;
8298 indx = elf_section_data (osec)->dynindx;
8299
8300 /* We are turning this relocation into one
8301 against a section symbol, so subtract out
8302 the output section's address but not the
8303 offset of the input section in the output
8304 section. */
8305 outrel.r_addend -= osec->vma;
8306 }
8307
8308 outrel.r_info = ELF64_R_INFO (indx, r_type);
8309 }
8310 }
8311
8312 sreloc = elf_section_data (input_section)->sreloc;
8313 if (sreloc == NULL)
8314 abort ();
8315
8316 loc = sreloc->contents;
8317 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8318 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8319
8320 /* If this reloc is against an external symbol, it will
8321 be computed at runtime, so there's no need to do
8322 anything now. However, for the sake of prelink ensure
8323 that the section contents are a known value. */
8324 if (! relocate)
8325 {
8326 unresolved_reloc = FALSE;
8327 /* The value chosen here is quite arbitrary as ld.so
8328 ignores section contents except for the special
8329 case of .opd where the contents might be accessed
8330 before relocation. Choose zero, as that won't
8331 cause reloc overflow. */
8332 relocation = 0;
8333 addend = 0;
8334 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8335 to improve backward compatibility with older
8336 versions of ld. */
8337 if (r_type == R_PPC64_ADDR64)
8338 addend = outrel.r_addend;
8339 /* Adjust pc_relative relocs to have zero in *r_offset. */
8340 else if (ppc64_elf_howto_table[(int) r_type]->pc_relative)
8341 addend = (input_section->output_section->vma
8342 + input_section->output_offset
8343 + rel->r_offset);
8344 }
8345 }
8346 break;
8347
8348 case R_PPC64_COPY:
8349 case R_PPC64_GLOB_DAT:
8350 case R_PPC64_JMP_SLOT:
8351 case R_PPC64_RELATIVE:
8352 /* We shouldn't ever see these dynamic relocs in relocatable
8353 files. */
8354 /* Fall through. */
8355
8356 case R_PPC64_PLTGOT16:
8357 case R_PPC64_PLTGOT16_DS:
8358 case R_PPC64_PLTGOT16_HA:
8359 case R_PPC64_PLTGOT16_HI:
8360 case R_PPC64_PLTGOT16_LO:
8361 case R_PPC64_PLTGOT16_LO_DS:
8362 case R_PPC64_PLTREL32:
8363 case R_PPC64_PLTREL64:
8364 /* These ones haven't been implemented yet. */
8365
8366 (*_bfd_error_handler)
8367 (_("%s: relocation %s is not supported for symbol %s."),
8368 bfd_archive_filename (input_bfd),
8369 ppc64_elf_howto_table[(int) r_type]->name, sym_name);
8370
8371 bfd_set_error (bfd_error_invalid_operation);
8372 ret = FALSE;
8373 continue;
8374 }
8375
8376 /* Do any further special processing. */
8377 switch (r_type)
8378 {
8379 default:
8380 break;
8381
8382 case R_PPC64_ADDR16_HA:
8383 case R_PPC64_ADDR16_HIGHERA:
8384 case R_PPC64_ADDR16_HIGHESTA:
8385 case R_PPC64_GOT16_HA:
8386 case R_PPC64_PLTGOT16_HA:
8387 case R_PPC64_PLT16_HA:
8388 case R_PPC64_TOC16_HA:
8389 case R_PPC64_SECTOFF_HA:
8390 case R_PPC64_TPREL16_HA:
8391 case R_PPC64_DTPREL16_HA:
8392 case R_PPC64_GOT_TLSGD16_HA:
8393 case R_PPC64_GOT_TLSLD16_HA:
8394 case R_PPC64_GOT_TPREL16_HA:
8395 case R_PPC64_GOT_DTPREL16_HA:
8396 case R_PPC64_TPREL16_HIGHER:
8397 case R_PPC64_TPREL16_HIGHERA:
8398 case R_PPC64_TPREL16_HIGHEST:
8399 case R_PPC64_TPREL16_HIGHESTA:
8400 case R_PPC64_DTPREL16_HIGHER:
8401 case R_PPC64_DTPREL16_HIGHERA:
8402 case R_PPC64_DTPREL16_HIGHEST:
8403 case R_PPC64_DTPREL16_HIGHESTA:
8404 /* It's just possible that this symbol is a weak symbol
8405 that's not actually defined anywhere. In that case,
8406 'sec' would be NULL, and we should leave the symbol
8407 alone (it will be set to zero elsewhere in the link). */
8408 if (sec != NULL)
8409 /* Add 0x10000 if sign bit in 0:15 is set.
8410 Bits 0:15 are not used. */
8411 addend += 0x8000;
8412 break;
8413
8414 case R_PPC64_ADDR16_DS:
8415 case R_PPC64_ADDR16_LO_DS:
8416 case R_PPC64_GOT16_DS:
8417 case R_PPC64_GOT16_LO_DS:
8418 case R_PPC64_PLT16_LO_DS:
8419 case R_PPC64_SECTOFF_DS:
8420 case R_PPC64_SECTOFF_LO_DS:
8421 case R_PPC64_TOC16_DS:
8422 case R_PPC64_TOC16_LO_DS:
8423 case R_PPC64_PLTGOT16_DS:
8424 case R_PPC64_PLTGOT16_LO_DS:
8425 case R_PPC64_GOT_TPREL16_DS:
8426 case R_PPC64_GOT_TPREL16_LO_DS:
8427 case R_PPC64_GOT_DTPREL16_DS:
8428 case R_PPC64_GOT_DTPREL16_LO_DS:
8429 case R_PPC64_TPREL16_DS:
8430 case R_PPC64_TPREL16_LO_DS:
8431 case R_PPC64_DTPREL16_DS:
8432 case R_PPC64_DTPREL16_LO_DS:
8433 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8434 mask = 3;
8435 /* If this reloc is against an lq insn, then the value must be
8436 a multiple of 16. This is somewhat of a hack, but the
8437 "correct" way to do this by defining _DQ forms of all the
8438 _DS relocs bloats all reloc switches in this file. It
8439 doesn't seem to make much sense to use any of these relocs
8440 in data, so testing the insn should be safe. */
8441 if ((insn & (0x3f << 26)) == (56 << 26))
8442 mask = 15;
8443 if (((relocation + addend) & mask) != 0)
8444 {
8445 (*_bfd_error_handler)
8446 (_("%s: error: relocation %s not a multiple of %d"),
8447 bfd_archive_filename (input_bfd),
8448 ppc64_elf_howto_table[(int) r_type]->name,
8449 mask + 1);
8450 bfd_set_error (bfd_error_bad_value);
8451 ret = FALSE;
8452 continue;
8453 }
8454 break;
8455
8456 case R_PPC64_REL14:
8457 case R_PPC64_REL14_BRNTAKEN:
8458 case R_PPC64_REL14_BRTAKEN:
8459 max_br_offset = 1 << 15;
8460 goto branch_check;
8461
8462 case R_PPC64_REL24:
8463 max_br_offset = 1 << 25;
8464
8465 branch_check:
8466 /* If the branch is out of reach or the TOC register needs
8467 adjusting, then redirect the call to the local stub for
8468 this function. */
8469 from = (rel->r_offset
8470 + input_section->output_offset
8471 + input_section->output_section->vma);
8472 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8473 || (sec != NULL
8474 && sec->output_section != NULL
8475 && (htab->stub_group[sec->id].toc_off
8476 != htab->stub_group[input_section->id].toc_off)))
8477 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8478 rel, htab)) != NULL)
8479 {
8480 /* Munge up the value and addend so that we call the stub
8481 rather than the procedure directly. */
8482 relocation = (stub_entry->stub_offset
8483 + stub_entry->stub_sec->output_offset
8484 + stub_entry->stub_sec->output_section->vma);
8485 addend = 0;
8486 }
8487 break;
8488 }
8489
8490 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8491 because such sections are not SEC_ALLOC and thus ld.so will
8492 not process them. */
8493 if (unresolved_reloc
8494 && !((input_section->flags & SEC_DEBUGGING) != 0
8495 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8496 {
8497 (*_bfd_error_handler)
8498 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8499 bfd_archive_filename (input_bfd),
8500 bfd_get_section_name (input_bfd, input_section),
8501 (long) rel->r_offset,
8502 ppc64_elf_howto_table[(int) r_type]->name,
8503 h->root.root.string);
8504 ret = FALSE;
8505 }
8506
8507 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8508 input_bfd,
8509 input_section,
8510 contents,
8511 rel->r_offset,
8512 relocation,
8513 addend);
8514
8515 if (r != bfd_reloc_ok)
8516 {
8517 if (sym_name == NULL)
8518 sym_name = "(null)";
8519 if (r == bfd_reloc_overflow)
8520 {
8521 if (warned)
8522 continue;
8523 if (h != NULL
8524 && h->root.type == bfd_link_hash_undefweak
8525 && ppc64_elf_howto_table[(int) r_type]->pc_relative)
8526 {
8527 /* Assume this is a call protected by other code that
8528 detects the symbol is undefined. If this is the case,
8529 we can safely ignore the overflow. If not, the
8530 program is hosed anyway, and a little warning isn't
8531 going to help. */
8532
8533 continue;
8534 }
8535
8536 if (!((*info->callbacks->reloc_overflow)
8537 (info, sym_name, ppc64_elf_howto_table[(int) r_type]->name,
8538 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8539 return FALSE;
8540 }
8541 else
8542 {
8543 (*_bfd_error_handler)
8544 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8545 bfd_archive_filename (input_bfd),
8546 bfd_get_section_name (input_bfd, input_section),
8547 (long) rel->r_offset,
8548 ppc64_elf_howto_table[(int) r_type]->name,
8549 sym_name,
8550 (int) r);
8551 ret = FALSE;
8552 }
8553 }
8554 }
8555
8556 return ret;
8557 }
8558
8559 /* Finish up dynamic symbol handling. We set the contents of various
8560 dynamic sections here. */
8561
8562 static bfd_boolean
8563 ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
8564 bfd *output_bfd;
8565 struct bfd_link_info *info;
8566 struct elf_link_hash_entry *h;
8567 Elf_Internal_Sym *sym;
8568 {
8569 struct ppc_link_hash_table *htab;
8570 bfd *dynobj;
8571
8572 htab = ppc_hash_table (info);
8573 dynobj = htab->elf.dynobj;
8574
8575 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8576 {
8577 struct plt_entry *ent;
8578 Elf_Internal_Rela rela;
8579 bfd_byte *loc;
8580
8581 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8582 if (ent->plt.offset != (bfd_vma) -1)
8583 {
8584 /* This symbol has an entry in the procedure linkage
8585 table. Set it up. */
8586
8587 if (htab->splt == NULL
8588 || htab->srelplt == NULL
8589 || htab->sglink == NULL)
8590 abort ();
8591
8592 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8593 fill in the PLT entry. */
8594 rela.r_offset = (htab->splt->output_section->vma
8595 + htab->splt->output_offset
8596 + ent->plt.offset);
8597 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8598 rela.r_addend = ent->addend;
8599
8600 loc = htab->srelplt->contents;
8601 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8602 * sizeof (Elf64_External_Rela));
8603 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8604 }
8605 }
8606
8607 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8608 {
8609 Elf_Internal_Rela rela;
8610 bfd_byte *loc;
8611
8612 /* This symbol needs a copy reloc. Set it up. */
8613
8614 if (h->dynindx == -1
8615 || (h->root.type != bfd_link_hash_defined
8616 && h->root.type != bfd_link_hash_defweak)
8617 || htab->srelbss == NULL)
8618 abort ();
8619
8620 rela.r_offset = (h->root.u.def.value
8621 + h->root.u.def.section->output_section->vma
8622 + h->root.u.def.section->output_offset);
8623 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8624 rela.r_addend = 0;
8625 loc = htab->srelbss->contents;
8626 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
8627 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8628 }
8629
8630 /* Mark some specially defined symbols as absolute. */
8631 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8632 sym->st_shndx = SHN_ABS;
8633
8634 return TRUE;
8635 }
8636
8637 /* Used to decide how to sort relocs in an optimal manner for the
8638 dynamic linker, before writing them out. */
8639
8640 static enum elf_reloc_type_class
8641 ppc64_elf_reloc_type_class (rela)
8642 const Elf_Internal_Rela *rela;
8643 {
8644 enum elf_ppc64_reloc_type r_type;
8645
8646 r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rela->r_info);
8647 switch (r_type)
8648 {
8649 case R_PPC64_RELATIVE:
8650 return reloc_class_relative;
8651 case R_PPC64_JMP_SLOT:
8652 return reloc_class_plt;
8653 case R_PPC64_COPY:
8654 return reloc_class_copy;
8655 default:
8656 return reloc_class_normal;
8657 }
8658 }
8659
8660 /* Finish up the dynamic sections. */
8661
8662 static bfd_boolean
8663 ppc64_elf_finish_dynamic_sections (output_bfd, info)
8664 bfd *output_bfd;
8665 struct bfd_link_info *info;
8666 {
8667 struct ppc_link_hash_table *htab;
8668 bfd *dynobj;
8669 asection *sdyn;
8670
8671 htab = ppc_hash_table (info);
8672 dynobj = htab->elf.dynobj;
8673 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8674
8675 if (htab->elf.dynamic_sections_created)
8676 {
8677 Elf64_External_Dyn *dyncon, *dynconend;
8678
8679 if (sdyn == NULL || htab->sgot == NULL)
8680 abort ();
8681
8682 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8683 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8684 for (; dyncon < dynconend; dyncon++)
8685 {
8686 Elf_Internal_Dyn dyn;
8687 asection *s;
8688
8689 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8690
8691 switch (dyn.d_tag)
8692 {
8693 default:
8694 continue;
8695
8696 case DT_PPC64_GLINK:
8697 s = htab->sglink;
8698 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8699 /* We stupidly defined DT_PPC64_GLINK to be the start
8700 of glink rather than the first entry point, which is
8701 what ld.so needs, and now have a bigger stub to
8702 support automatic multiple TOCs. */
8703 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8704 break;
8705
8706 case DT_PPC64_OPD:
8707 s = bfd_get_section_by_name (output_bfd, ".opd");
8708 if (s == NULL)
8709 continue;
8710 dyn.d_un.d_ptr = s->vma;
8711 break;
8712
8713 case DT_PPC64_OPDSZ:
8714 s = bfd_get_section_by_name (output_bfd, ".opd");
8715 if (s == NULL)
8716 continue;
8717 dyn.d_un.d_val = s->_raw_size;
8718 break;
8719
8720 case DT_PLTGOT:
8721 s = htab->splt;
8722 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8723 break;
8724
8725 case DT_JMPREL:
8726 s = htab->srelplt;
8727 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8728 break;
8729
8730 case DT_PLTRELSZ:
8731 dyn.d_un.d_val = htab->srelplt->_raw_size;
8732 break;
8733
8734 case DT_RELASZ:
8735 /* Don't count procedure linkage table relocs in the
8736 overall reloc count. */
8737 s = htab->srelplt;
8738 if (s == NULL)
8739 continue;
8740 dyn.d_un.d_val -= s->_raw_size;
8741 break;
8742
8743 case DT_RELA:
8744 /* We may not be using the standard ELF linker script.
8745 If .rela.plt is the first .rela section, we adjust
8746 DT_RELA to not include it. */
8747 s = htab->srelplt;
8748 if (s == NULL)
8749 continue;
8750 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8751 continue;
8752 dyn.d_un.d_ptr += s->_raw_size;
8753 break;
8754 }
8755
8756 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8757 }
8758 }
8759
8760 if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
8761 {
8762 /* Fill in the first entry in the global offset table.
8763 We use it to hold the link-time TOCbase. */
8764 bfd_put_64 (output_bfd,
8765 elf_gp (output_bfd) + TOC_BASE_OFF,
8766 htab->sgot->contents);
8767
8768 /* Set .got entry size. */
8769 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
8770 }
8771
8772 if (htab->splt != NULL && htab->splt->_raw_size != 0)
8773 {
8774 /* Set .plt entry size. */
8775 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
8776 = PLT_ENTRY_SIZE;
8777 }
8778
8779 return TRUE;
8780 }
8781
8782 #include "elf64-target.h"
GDB Binutils - Deliverables
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