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[thirdparty/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36
37 static bfd_reloc_status_type ppc64_elf_ha_reloc
38 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
39 static bfd_reloc_status_type ppc64_elf_branch_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_toc_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc64_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_vma opd_entry_value
56 (asection *, bfd_vma, asection **, bfd_vma *);
57
58 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
59 #define TARGET_LITTLE_NAME "elf64-powerpcle"
60 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
61 #define TARGET_BIG_NAME "elf64-powerpc"
62 #define ELF_ARCH bfd_arch_powerpc
63 #define ELF_MACHINE_CODE EM_PPC64
64 #define ELF_MAXPAGESIZE 0x10000
65 #define ELF_COMMONPAGESIZE 0x1000
66 #define elf_info_to_howto ppc64_elf_info_to_howto
67
68 #define elf_backend_want_got_sym 0
69 #define elf_backend_want_plt_sym 0
70 #define elf_backend_plt_alignment 3
71 #define elf_backend_plt_not_loaded 1
72 #define elf_backend_got_header_size 8
73 #define elf_backend_can_gc_sections 1
74 #define elf_backend_can_refcount 1
75 #define elf_backend_rela_normal 1
76 #define elf_backend_default_execstack 0
77
78 #define bfd_elf64_mkobject ppc64_elf_mkobject
79 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
80 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
81 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
82 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
83 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
84 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
85 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
86
87 #define elf_backend_object_p ppc64_elf_object_p
88 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
89 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
90 #define elf_backend_write_core_note ppc64_elf_write_core_note
91 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
92 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
93 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
94 #define elf_backend_check_directives ppc64_elf_check_directives
95 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
96 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
97 #define elf_backend_check_relocs ppc64_elf_check_relocs
98 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
99 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
100 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
101 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
102 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
103 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
104 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
105 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
106 #define elf_backend_action_discarded ppc64_elf_action_discarded
107 #define elf_backend_relocate_section ppc64_elf_relocate_section
108 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
109 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
110 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
111 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
112 #define elf_backend_special_sections ppc64_elf_special_sections
113
114 /* The name of the dynamic interpreter. This is put in the .interp
115 section. */
116 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
117
118 /* The size in bytes of an entry in the procedure linkage table. */
119 #define PLT_ENTRY_SIZE 24
120
121 /* The initial size of the plt reserved for the dynamic linker. */
122 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
123
124 /* TOC base pointers offset from start of TOC. */
125 #define TOC_BASE_OFF 0x8000
126
127 /* Offset of tp and dtp pointers from start of TLS block. */
128 #define TP_OFFSET 0x7000
129 #define DTP_OFFSET 0x8000
130
131 /* .plt call stub instructions. The normal stub is like this, but
132 sometimes the .plt entry crosses a 64k boundary and we need to
133 insert an addis to adjust r12. */
134 #define PLT_CALL_STUB_SIZE (7*4)
135 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
136 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
137 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
138 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
139 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
140 /* ld %r11,xxx+16@l(%r12) */
141 #define BCTR 0x4e800420 /* bctr */
142
143
144 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
145 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
146 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
147
148 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
149
150 /* glink call stub instructions. We enter with the index in R0. */
151 #define GLINK_CALL_STUB_SIZE (16*4)
152 /* 0: */
153 /* .quad plt0-1f */
154 /* __glink: */
155 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
156 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
157 /* 1: */
158 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
159 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
160 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
161 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
162 /* ld %11,0(%12) */
163 /* ld %2,8(%12) */
164 /* mtctr %11 */
165 /* ld %11,16(%12) */
166 /* bctr */
167
168 /* Pad with this. */
169 #define NOP 0x60000000
170
171 /* Some other nops. */
172 #define CROR_151515 0x4def7b82
173 #define CROR_313131 0x4ffffb82
174
175 /* .glink entries for the first 32k functions are two instructions. */
176 #define LI_R0_0 0x38000000 /* li %r0,0 */
177 #define B_DOT 0x48000000 /* b . */
178
179 /* After that, we need two instructions to load the index, followed by
180 a branch. */
181 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
182 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
183
184 /* Instructions used by the save and restore reg functions. */
185 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
186 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
187 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
188 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
189 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
190 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
191 #define LI_R12_0 0x39800000 /* li %r12,0 */
192 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
193 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
194 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
195 #define BLR 0x4e800020 /* blr */
196
197 /* Since .opd is an array of descriptors and each entry will end up
198 with identical R_PPC64_RELATIVE relocs, there is really no need to
199 propagate .opd relocs; The dynamic linker should be taught to
200 relocate .opd without reloc entries. */
201 #ifndef NO_OPD_RELOCS
202 #define NO_OPD_RELOCS 0
203 #endif
204 \f
205 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
206
207 /* Relocation HOWTO's. */
208 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
209
210 static reloc_howto_type ppc64_elf_howto_raw[] = {
211 /* This reloc does nothing. */
212 HOWTO (R_PPC64_NONE, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 32, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 bfd_elf_generic_reloc, /* special_function */
220 "R_PPC64_NONE", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 /* A standard 32 bit relocation. */
227 HOWTO (R_PPC64_ADDR32, /* type */
228 0, /* rightshift */
229 2, /* size (0 = byte, 1 = short, 2 = long) */
230 32, /* bitsize */
231 FALSE, /* pc_relative */
232 0, /* bitpos */
233 complain_overflow_bitfield, /* complain_on_overflow */
234 bfd_elf_generic_reloc, /* special_function */
235 "R_PPC64_ADDR32", /* name */
236 FALSE, /* partial_inplace */
237 0, /* src_mask */
238 0xffffffff, /* dst_mask */
239 FALSE), /* pcrel_offset */
240
241 /* An absolute 26 bit branch; the lower two bits must be zero.
242 FIXME: we don't check that, we just clear them. */
243 HOWTO (R_PPC64_ADDR24, /* type */
244 0, /* rightshift */
245 2, /* size (0 = byte, 1 = short, 2 = long) */
246 26, /* bitsize */
247 FALSE, /* pc_relative */
248 0, /* bitpos */
249 complain_overflow_bitfield, /* complain_on_overflow */
250 bfd_elf_generic_reloc, /* special_function */
251 "R_PPC64_ADDR24", /* name */
252 FALSE, /* partial_inplace */
253 0, /* src_mask */
254 0x03fffffc, /* dst_mask */
255 FALSE), /* pcrel_offset */
256
257 /* A standard 16 bit relocation. */
258 HOWTO (R_PPC64_ADDR16, /* type */
259 0, /* rightshift */
260 1, /* size (0 = byte, 1 = short, 2 = long) */
261 16, /* bitsize */
262 FALSE, /* pc_relative */
263 0, /* bitpos */
264 complain_overflow_bitfield, /* complain_on_overflow */
265 bfd_elf_generic_reloc, /* special_function */
266 "R_PPC64_ADDR16", /* name */
267 FALSE, /* partial_inplace */
268 0, /* src_mask */
269 0xffff, /* dst_mask */
270 FALSE), /* pcrel_offset */
271
272 /* A 16 bit relocation without overflow. */
273 HOWTO (R_PPC64_ADDR16_LO, /* type */
274 0, /* rightshift */
275 1, /* size (0 = byte, 1 = short, 2 = long) */
276 16, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_dont,/* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_PPC64_ADDR16_LO", /* name */
282 FALSE, /* partial_inplace */
283 0, /* src_mask */
284 0xffff, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* Bits 16-31 of an address. */
288 HOWTO (R_PPC64_ADDR16_HI, /* type */
289 16, /* rightshift */
290 1, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_dont, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC64_ADDR16_HI", /* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xffff, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
303 bits, treated as a signed number, is negative. */
304 HOWTO (R_PPC64_ADDR16_HA, /* type */
305 16, /* rightshift */
306 1, /* size (0 = byte, 1 = short, 2 = long) */
307 16, /* bitsize */
308 FALSE, /* pc_relative */
309 0, /* bitpos */
310 complain_overflow_dont, /* complain_on_overflow */
311 ppc64_elf_ha_reloc, /* special_function */
312 "R_PPC64_ADDR16_HA", /* name */
313 FALSE, /* partial_inplace */
314 0, /* src_mask */
315 0xffff, /* dst_mask */
316 FALSE), /* pcrel_offset */
317
318 /* An absolute 16 bit branch; the lower two bits must be zero.
319 FIXME: we don't check that, we just clear them. */
320 HOWTO (R_PPC64_ADDR14, /* 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_branch_reloc, /* special_function */
328 "R_PPC64_ADDR14", /* 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 expected to be taken. The lower two
336 bits must be zero. */
337 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* 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_BRTAKEN",/* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0x0000fffc, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 /* An absolute 16 bit branch, for which bit 10 should be set to
352 indicate that the branch is not expected to be taken. The lower
353 two bits must be zero. */
354 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 FALSE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_bitfield, /* complain_on_overflow */
361 ppc64_elf_brtaken_reloc, /* special_function */
362 "R_PPC64_ADDR14_BRNTAKEN",/* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0x0000fffc, /* dst_mask */
366 FALSE), /* pcrel_offset */
367
368 /* A relative 26 bit branch; the lower two bits must be zero. */
369 HOWTO (R_PPC64_REL24, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 26, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 ppc64_elf_branch_reloc, /* special_function */
377 "R_PPC64_REL24", /* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0x03fffffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* A relative 16 bit branch; the lower two bits must be zero. */
384 HOWTO (R_PPC64_REL14, /* 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_branch_reloc, /* special_function */
392 "R_PPC64_REL14", /* 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 expected to be taken. The lower two bits must be
400 zero. */
401 HOWTO (R_PPC64_REL14_BRTAKEN, /* 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_BRTAKEN", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0x0000fffc, /* dst_mask */
413 TRUE), /* pcrel_offset */
414
415 /* A relative 16 bit branch. Bit 10 should be set to indicate that
416 the branch is not expected to be taken. The lower two bits must
417 be zero. */
418 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
419 0, /* rightshift */
420 2, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 TRUE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_signed, /* complain_on_overflow */
425 ppc64_elf_brtaken_reloc, /* special_function */
426 "R_PPC64_REL14_BRNTAKEN",/* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0x0000fffc, /* dst_mask */
430 TRUE), /* pcrel_offset */
431
432 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
433 symbol. */
434 HOWTO (R_PPC64_GOT16, /* type */
435 0, /* rightshift */
436 1, /* size (0 = byte, 1 = short, 2 = long) */
437 16, /* bitsize */
438 FALSE, /* pc_relative */
439 0, /* bitpos */
440 complain_overflow_signed, /* complain_on_overflow */
441 ppc64_elf_unhandled_reloc, /* special_function */
442 "R_PPC64_GOT16", /* name */
443 FALSE, /* partial_inplace */
444 0, /* src_mask */
445 0xffff, /* dst_mask */
446 FALSE), /* pcrel_offset */
447
448 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
449 the symbol. */
450 HOWTO (R_PPC64_GOT16_LO, /* type */
451 0, /* rightshift */
452 1, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 FALSE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_dont, /* complain_on_overflow */
457 ppc64_elf_unhandled_reloc, /* special_function */
458 "R_PPC64_GOT16_LO", /* name */
459 FALSE, /* partial_inplace */
460 0, /* src_mask */
461 0xffff, /* dst_mask */
462 FALSE), /* pcrel_offset */
463
464 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
465 the symbol. */
466 HOWTO (R_PPC64_GOT16_HI, /* type */
467 16, /* rightshift */
468 1, /* size (0 = byte, 1 = short, 2 = long) */
469 16, /* bitsize */
470 FALSE, /* pc_relative */
471 0, /* bitpos */
472 complain_overflow_dont,/* complain_on_overflow */
473 ppc64_elf_unhandled_reloc, /* special_function */
474 "R_PPC64_GOT16_HI", /* name */
475 FALSE, /* partial_inplace */
476 0, /* src_mask */
477 0xffff, /* dst_mask */
478 FALSE), /* pcrel_offset */
479
480 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
481 the symbol. */
482 HOWTO (R_PPC64_GOT16_HA, /* type */
483 16, /* rightshift */
484 1, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 0, /* bitpos */
488 complain_overflow_dont,/* complain_on_overflow */
489 ppc64_elf_unhandled_reloc, /* special_function */
490 "R_PPC64_GOT16_HA", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0xffff, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 /* This is used only by the dynamic linker. The symbol should exist
497 both in the object being run and in some shared library. The
498 dynamic linker copies the data addressed by the symbol from the
499 shared library into the object, because the object being
500 run has to have the data at some particular address. */
501 HOWTO (R_PPC64_COPY, /* type */
502 0, /* rightshift */
503 0, /* this one is variable size */
504 0, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_dont, /* complain_on_overflow */
508 ppc64_elf_unhandled_reloc, /* special_function */
509 "R_PPC64_COPY", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Like R_PPC64_ADDR64, but used when setting global offset table
516 entries. */
517 HOWTO (R_PPC64_GLOB_DAT, /* type */
518 0, /* rightshift */
519 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
520 64, /* bitsize */
521 FALSE, /* pc_relative */
522 0, /* bitpos */
523 complain_overflow_dont, /* complain_on_overflow */
524 ppc64_elf_unhandled_reloc, /* special_function */
525 "R_PPC64_GLOB_DAT", /* name */
526 FALSE, /* partial_inplace */
527 0, /* src_mask */
528 ONES (64), /* dst_mask */
529 FALSE), /* pcrel_offset */
530
531 /* Created by the link editor. Marks a procedure linkage table
532 entry for a symbol. */
533 HOWTO (R_PPC64_JMP_SLOT, /* type */
534 0, /* rightshift */
535 0, /* size (0 = byte, 1 = short, 2 = long) */
536 0, /* bitsize */
537 FALSE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_dont, /* complain_on_overflow */
540 ppc64_elf_unhandled_reloc, /* special_function */
541 "R_PPC64_JMP_SLOT", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0, /* dst_mask */
545 FALSE), /* pcrel_offset */
546
547 /* Used only by the dynamic linker. When the object is run, this
548 doubleword64 is set to the load address of the object, plus the
549 addend. */
550 HOWTO (R_PPC64_RELATIVE, /* type */
551 0, /* rightshift */
552 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
553 64, /* bitsize */
554 FALSE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_dont, /* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_PPC64_RELATIVE", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 ONES (64), /* dst_mask */
562 FALSE), /* pcrel_offset */
563
564 /* Like R_PPC64_ADDR32, but may be unaligned. */
565 HOWTO (R_PPC64_UADDR32, /* type */
566 0, /* rightshift */
567 2, /* size (0 = byte, 1 = short, 2 = long) */
568 32, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_bitfield, /* complain_on_overflow */
572 bfd_elf_generic_reloc, /* special_function */
573 "R_PPC64_UADDR32", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0xffffffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* Like R_PPC64_ADDR16, but may be unaligned. */
580 HOWTO (R_PPC64_UADDR16, /* type */
581 0, /* rightshift */
582 1, /* size (0 = byte, 1 = short, 2 = long) */
583 16, /* bitsize */
584 FALSE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_bitfield, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 "R_PPC64_UADDR16", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0xffff, /* dst_mask */
592 FALSE), /* pcrel_offset */
593
594 /* 32-bit PC relative. */
595 HOWTO (R_PPC64_REL32, /* type */
596 0, /* rightshift */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
598 32, /* bitsize */
599 TRUE, /* pc_relative */
600 0, /* bitpos */
601 /* FIXME: Verify. Was complain_overflow_bitfield. */
602 complain_overflow_signed, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_PPC64_REL32", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 TRUE), /* pcrel_offset */
609
610 /* 32-bit relocation to the symbol's procedure linkage table. */
611 HOWTO (R_PPC64_PLT32, /* type */
612 0, /* rightshift */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
614 32, /* bitsize */
615 FALSE, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_bitfield, /* complain_on_overflow */
618 ppc64_elf_unhandled_reloc, /* special_function */
619 "R_PPC64_PLT32", /* name */
620 FALSE, /* partial_inplace */
621 0, /* src_mask */
622 0xffffffff, /* dst_mask */
623 FALSE), /* pcrel_offset */
624
625 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
626 FIXME: R_PPC64_PLTREL32 not supported. */
627 HOWTO (R_PPC64_PLTREL32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 TRUE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_signed, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_PLTREL32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 TRUE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
642 the symbol. */
643 HOWTO (R_PPC64_PLT16_LO, /* type */
644 0, /* rightshift */
645 1, /* size (0 = byte, 1 = short, 2 = long) */
646 16, /* bitsize */
647 FALSE, /* pc_relative */
648 0, /* bitpos */
649 complain_overflow_dont, /* complain_on_overflow */
650 ppc64_elf_unhandled_reloc, /* special_function */
651 "R_PPC64_PLT16_LO", /* name */
652 FALSE, /* partial_inplace */
653 0, /* src_mask */
654 0xffff, /* dst_mask */
655 FALSE), /* pcrel_offset */
656
657 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
658 the symbol. */
659 HOWTO (R_PPC64_PLT16_HI, /* type */
660 16, /* rightshift */
661 1, /* size (0 = byte, 1 = short, 2 = long) */
662 16, /* bitsize */
663 FALSE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_dont, /* complain_on_overflow */
666 ppc64_elf_unhandled_reloc, /* special_function */
667 "R_PPC64_PLT16_HI", /* name */
668 FALSE, /* partial_inplace */
669 0, /* src_mask */
670 0xffff, /* dst_mask */
671 FALSE), /* pcrel_offset */
672
673 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
674 the symbol. */
675 HOWTO (R_PPC64_PLT16_HA, /* type */
676 16, /* rightshift */
677 1, /* size (0 = byte, 1 = short, 2 = long) */
678 16, /* bitsize */
679 FALSE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_dont, /* complain_on_overflow */
682 ppc64_elf_unhandled_reloc, /* special_function */
683 "R_PPC64_PLT16_HA", /* name */
684 FALSE, /* partial_inplace */
685 0, /* src_mask */
686 0xffff, /* dst_mask */
687 FALSE), /* pcrel_offset */
688
689 /* 16-bit section relative relocation. */
690 HOWTO (R_PPC64_SECTOFF, /* type */
691 0, /* rightshift */
692 1, /* size (0 = byte, 1 = short, 2 = long) */
693 16, /* bitsize */
694 FALSE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_bitfield, /* complain_on_overflow */
697 ppc64_elf_sectoff_reloc, /* special_function */
698 "R_PPC64_SECTOFF", /* name */
699 FALSE, /* partial_inplace */
700 0, /* src_mask */
701 0xffff, /* dst_mask */
702 FALSE), /* pcrel_offset */
703
704 /* Like R_PPC64_SECTOFF, but no overflow warning. */
705 HOWTO (R_PPC64_SECTOFF_LO, /* type */
706 0, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_dont, /* complain_on_overflow */
712 ppc64_elf_sectoff_reloc, /* special_function */
713 "R_PPC64_SECTOFF_LO", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* 16-bit upper half section relative relocation. */
720 HOWTO (R_PPC64_SECTOFF_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_dont, /* complain_on_overflow */
727 ppc64_elf_sectoff_reloc, /* special_function */
728 "R_PPC64_SECTOFF_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* 16-bit upper half adjusted section relative relocation. */
735 HOWTO (R_PPC64_SECTOFF_HA, /* type */
736 16, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_dont, /* complain_on_overflow */
742 ppc64_elf_sectoff_ha_reloc, /* special_function */
743 "R_PPC64_SECTOFF_HA", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* Like R_PPC64_REL24 without touching the two least significant bits. */
750 HOWTO (R_PPC64_REL30, /* type */
751 2, /* rightshift */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
753 30, /* bitsize */
754 TRUE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_dont, /* complain_on_overflow */
757 bfd_elf_generic_reloc, /* special_function */
758 "R_PPC64_REL30", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0xfffffffc, /* dst_mask */
762 TRUE), /* pcrel_offset */
763
764 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
765
766 /* A standard 64-bit relocation. */
767 HOWTO (R_PPC64_ADDR64, /* type */
768 0, /* rightshift */
769 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
770 64, /* bitsize */
771 FALSE, /* pc_relative */
772 0, /* bitpos */
773 complain_overflow_dont, /* complain_on_overflow */
774 bfd_elf_generic_reloc, /* special_function */
775 "R_PPC64_ADDR64", /* name */
776 FALSE, /* partial_inplace */
777 0, /* src_mask */
778 ONES (64), /* dst_mask */
779 FALSE), /* pcrel_offset */
780
781 /* The bits 32-47 of an address. */
782 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
783 32, /* rightshift */
784 1, /* size (0 = byte, 1 = short, 2 = long) */
785 16, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 bfd_elf_generic_reloc, /* special_function */
790 "R_PPC64_ADDR16_HIGHER", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* The bits 32-47 of an address, plus 1 if the contents of the low
797 16 bits, treated as a signed number, is negative. */
798 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
799 32, /* rightshift */
800 1, /* size (0 = byte, 1 = short, 2 = long) */
801 16, /* bitsize */
802 FALSE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_dont, /* complain_on_overflow */
805 ppc64_elf_ha_reloc, /* special_function */
806 "R_PPC64_ADDR16_HIGHERA", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0xffff, /* dst_mask */
810 FALSE), /* pcrel_offset */
811
812 /* The bits 48-63 of an address. */
813 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
814 48, /* rightshift */
815 1, /* size (0 = byte, 1 = short, 2 = long) */
816 16, /* bitsize */
817 FALSE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 bfd_elf_generic_reloc, /* special_function */
821 "R_PPC64_ADDR16_HIGHEST", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 0xffff, /* dst_mask */
825 FALSE), /* pcrel_offset */
826
827 /* The bits 48-63 of an address, plus 1 if the contents of the low
828 16 bits, treated as a signed number, is negative. */
829 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
830 48, /* rightshift */
831 1, /* size (0 = byte, 1 = short, 2 = long) */
832 16, /* bitsize */
833 FALSE, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_dont, /* complain_on_overflow */
836 ppc64_elf_ha_reloc, /* special_function */
837 "R_PPC64_ADDR16_HIGHESTA", /* name */
838 FALSE, /* partial_inplace */
839 0, /* src_mask */
840 0xffff, /* dst_mask */
841 FALSE), /* pcrel_offset */
842
843 /* Like ADDR64, but may be unaligned. */
844 HOWTO (R_PPC64_UADDR64, /* type */
845 0, /* rightshift */
846 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
847 64, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 bfd_elf_generic_reloc, /* special_function */
852 "R_PPC64_UADDR64", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 ONES (64), /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* 64-bit relative relocation. */
859 HOWTO (R_PPC64_REL64, /* type */
860 0, /* rightshift */
861 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
862 64, /* bitsize */
863 TRUE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 "R_PPC64_REL64", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 ONES (64), /* dst_mask */
871 TRUE), /* pcrel_offset */
872
873 /* 64-bit relocation to the symbol's procedure linkage table. */
874 HOWTO (R_PPC64_PLT64, /* type */
875 0, /* rightshift */
876 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
877 64, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 ppc64_elf_unhandled_reloc, /* special_function */
882 "R_PPC64_PLT64", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 ONES (64), /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* 64-bit PC relative relocation to the symbol's procedure linkage
889 table. */
890 /* FIXME: R_PPC64_PLTREL64 not supported. */
891 HOWTO (R_PPC64_PLTREL64, /* type */
892 0, /* rightshift */
893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
894 64, /* bitsize */
895 TRUE, /* pc_relative */
896 0, /* bitpos */
897 complain_overflow_dont, /* complain_on_overflow */
898 ppc64_elf_unhandled_reloc, /* special_function */
899 "R_PPC64_PLTREL64", /* name */
900 FALSE, /* partial_inplace */
901 0, /* src_mask */
902 ONES (64), /* dst_mask */
903 TRUE), /* pcrel_offset */
904
905 /* 16 bit TOC-relative relocation. */
906
907 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
908 HOWTO (R_PPC64_TOC16, /* 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_signed, /* complain_on_overflow */
915 ppc64_elf_toc_reloc, /* special_function */
916 "R_PPC64_TOC16", /* name */
917 FALSE, /* partial_inplace */
918 0, /* src_mask */
919 0xffff, /* dst_mask */
920 FALSE), /* pcrel_offset */
921
922 /* 16 bit TOC-relative relocation without overflow. */
923
924 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
925 HOWTO (R_PPC64_TOC16_LO, /* type */
926 0, /* 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_LO", /* 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. */
940
941 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
942 HOWTO (R_PPC64_TOC16_HI, /* type */
943 16, /* rightshift */
944 1, /* size (0 = byte, 1 = short, 2 = long) */
945 16, /* bitsize */
946 FALSE, /* pc_relative */
947 0, /* bitpos */
948 complain_overflow_dont, /* complain_on_overflow */
949 ppc64_elf_toc_reloc, /* special_function */
950 "R_PPC64_TOC16_HI", /* name */
951 FALSE, /* partial_inplace */
952 0, /* src_mask */
953 0xffff, /* dst_mask */
954 FALSE), /* pcrel_offset */
955
956 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
957 contents of the low 16 bits, treated as a signed number, is
958 negative. */
959
960 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
961 HOWTO (R_PPC64_TOC16_HA, /* type */
962 16, /* rightshift */
963 1, /* size (0 = byte, 1 = short, 2 = long) */
964 16, /* bitsize */
965 FALSE, /* pc_relative */
966 0, /* bitpos */
967 complain_overflow_dont, /* complain_on_overflow */
968 ppc64_elf_toc_ha_reloc, /* special_function */
969 "R_PPC64_TOC16_HA", /* name */
970 FALSE, /* partial_inplace */
971 0, /* src_mask */
972 0xffff, /* dst_mask */
973 FALSE), /* pcrel_offset */
974
975 /* 64-bit relocation; insert value of TOC base (.TOC.). */
976
977 /* R_PPC64_TOC 51 doubleword64 .TOC. */
978 HOWTO (R_PPC64_TOC, /* type */
979 0, /* rightshift */
980 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
981 64, /* bitsize */
982 FALSE, /* pc_relative */
983 0, /* bitpos */
984 complain_overflow_bitfield, /* complain_on_overflow */
985 ppc64_elf_toc64_reloc, /* special_function */
986 "R_PPC64_TOC", /* name */
987 FALSE, /* partial_inplace */
988 0, /* src_mask */
989 ONES (64), /* dst_mask */
990 FALSE), /* pcrel_offset */
991
992 /* Like R_PPC64_GOT16, but also informs the link editor that the
993 value to relocate may (!) refer to a PLT entry which the link
994 editor (a) may replace with the symbol value. If the link editor
995 is unable to fully resolve the symbol, it may (b) create a PLT
996 entry and store the address to the new PLT entry in the GOT.
997 This permits lazy resolution of function symbols at run time.
998 The link editor may also skip all of this and just (c) emit a
999 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1000 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1001 HOWTO (R_PPC64_PLTGOT16, /* type */
1002 0, /* rightshift */
1003 1, /* size (0 = byte, 1 = short, 2 = long) */
1004 16, /* bitsize */
1005 FALSE, /* pc_relative */
1006 0, /* bitpos */
1007 complain_overflow_signed, /* complain_on_overflow */
1008 ppc64_elf_unhandled_reloc, /* special_function */
1009 "R_PPC64_PLTGOT16", /* name */
1010 FALSE, /* partial_inplace */
1011 0, /* src_mask */
1012 0xffff, /* dst_mask */
1013 FALSE), /* pcrel_offset */
1014
1015 /* Like R_PPC64_PLTGOT16, but without overflow. */
1016 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1017 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1018 0, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_dont, /* complain_on_overflow */
1024 ppc64_elf_unhandled_reloc, /* special_function */
1025 "R_PPC64_PLTGOT16_LO", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1032 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1033 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc64_elf_unhandled_reloc, /* special_function */
1041 "R_PPC64_PLTGOT16_HI", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1048 1 if the contents of the low 16 bits, treated as a signed number,
1049 is negative. */
1050 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1051 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1052 16, /* rightshift */
1053 1, /* size (0 = byte, 1 = short, 2 = long) */
1054 16, /* bitsize */
1055 FALSE, /* pc_relative */
1056 0, /* bitpos */
1057 complain_overflow_dont,/* complain_on_overflow */
1058 ppc64_elf_unhandled_reloc, /* special_function */
1059 "R_PPC64_PLTGOT16_HA", /* name */
1060 FALSE, /* partial_inplace */
1061 0, /* src_mask */
1062 0xffff, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1064
1065 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1066 HOWTO (R_PPC64_ADDR16_DS, /* type */
1067 0, /* rightshift */
1068 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 16, /* bitsize */
1070 FALSE, /* pc_relative */
1071 0, /* bitpos */
1072 complain_overflow_bitfield, /* complain_on_overflow */
1073 bfd_elf_generic_reloc, /* special_function */
1074 "R_PPC64_ADDR16_DS", /* name */
1075 FALSE, /* partial_inplace */
1076 0, /* src_mask */
1077 0xfffc, /* dst_mask */
1078 FALSE), /* pcrel_offset */
1079
1080 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1081 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1082 0, /* rightshift */
1083 1, /* size (0 = byte, 1 = short, 2 = long) */
1084 16, /* bitsize */
1085 FALSE, /* pc_relative */
1086 0, /* bitpos */
1087 complain_overflow_dont,/* complain_on_overflow */
1088 bfd_elf_generic_reloc, /* special_function */
1089 "R_PPC64_ADDR16_LO_DS",/* name */
1090 FALSE, /* partial_inplace */
1091 0, /* src_mask */
1092 0xfffc, /* dst_mask */
1093 FALSE), /* pcrel_offset */
1094
1095 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1096 HOWTO (R_PPC64_GOT16_DS, /* type */
1097 0, /* rightshift */
1098 1, /* size (0 = byte, 1 = short, 2 = long) */
1099 16, /* bitsize */
1100 FALSE, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_signed, /* complain_on_overflow */
1103 ppc64_elf_unhandled_reloc, /* special_function */
1104 "R_PPC64_GOT16_DS", /* name */
1105 FALSE, /* partial_inplace */
1106 0, /* src_mask */
1107 0xfffc, /* dst_mask */
1108 FALSE), /* pcrel_offset */
1109
1110 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1111 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_dont, /* complain_on_overflow */
1118 ppc64_elf_unhandled_reloc, /* special_function */
1119 "R_PPC64_GOT16_LO_DS", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xfffc, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1126 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc64_elf_unhandled_reloc, /* special_function */
1134 "R_PPC64_PLT16_LO_DS", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xfffc, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1141 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1142 0, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_bitfield, /* complain_on_overflow */
1148 ppc64_elf_sectoff_reloc, /* special_function */
1149 "R_PPC64_SECTOFF_DS", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xfffc, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1156 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1157 0, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc64_elf_sectoff_reloc, /* special_function */
1164 "R_PPC64_SECTOFF_LO_DS",/* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xfffc, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1171 HOWTO (R_PPC64_TOC16_DS, /* type */
1172 0, /* rightshift */
1173 1, /* size (0 = byte, 1 = short, 2 = long) */
1174 16, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_signed, /* complain_on_overflow */
1178 ppc64_elf_toc_reloc, /* special_function */
1179 "R_PPC64_TOC16_DS", /* name */
1180 FALSE, /* partial_inplace */
1181 0, /* src_mask */
1182 0xfffc, /* dst_mask */
1183 FALSE), /* pcrel_offset */
1184
1185 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1186 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1187 0, /* rightshift */
1188 1, /* size (0 = byte, 1 = short, 2 = long) */
1189 16, /* bitsize */
1190 FALSE, /* pc_relative */
1191 0, /* bitpos */
1192 complain_overflow_dont, /* complain_on_overflow */
1193 ppc64_elf_toc_reloc, /* special_function */
1194 "R_PPC64_TOC16_LO_DS", /* name */
1195 FALSE, /* partial_inplace */
1196 0, /* src_mask */
1197 0xfffc, /* dst_mask */
1198 FALSE), /* pcrel_offset */
1199
1200 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1201 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1202 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_unhandled_reloc, /* special_function */
1210 "R_PPC64_PLTGOT16_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1217 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1218 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1219 0, /* rightshift */
1220 1, /* size (0 = byte, 1 = short, 2 = long) */
1221 16, /* bitsize */
1222 FALSE, /* pc_relative */
1223 0, /* bitpos */
1224 complain_overflow_dont, /* complain_on_overflow */
1225 ppc64_elf_unhandled_reloc, /* special_function */
1226 "R_PPC64_PLTGOT16_LO_DS",/* name */
1227 FALSE, /* partial_inplace */
1228 0, /* src_mask */
1229 0xfffc, /* dst_mask */
1230 FALSE), /* pcrel_offset */
1231
1232 /* Marker reloc for TLS. */
1233 HOWTO (R_PPC64_TLS,
1234 0, /* rightshift */
1235 2, /* size (0 = byte, 1 = short, 2 = long) */
1236 32, /* bitsize */
1237 FALSE, /* pc_relative */
1238 0, /* bitpos */
1239 complain_overflow_dont, /* complain_on_overflow */
1240 bfd_elf_generic_reloc, /* special_function */
1241 "R_PPC64_TLS", /* name */
1242 FALSE, /* partial_inplace */
1243 0, /* src_mask */
1244 0, /* dst_mask */
1245 FALSE), /* pcrel_offset */
1246
1247 /* Computes the load module index of the load module that contains the
1248 definition of its TLS sym. */
1249 HOWTO (R_PPC64_DTPMOD64,
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_DTPMOD64", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 ONES (64), /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 /* Computes a dtv-relative displacement, the difference between the value
1264 of sym+add and the base address of the thread-local storage block that
1265 contains the definition of sym, minus 0x8000. */
1266 HOWTO (R_PPC64_DTPREL64,
1267 0, /* rightshift */
1268 4, /* size (0 = byte, 1 = short, 2 = long) */
1269 64, /* bitsize */
1270 FALSE, /* pc_relative */
1271 0, /* bitpos */
1272 complain_overflow_dont, /* complain_on_overflow */
1273 ppc64_elf_unhandled_reloc, /* special_function */
1274 "R_PPC64_DTPREL64", /* name */
1275 FALSE, /* partial_inplace */
1276 0, /* src_mask */
1277 ONES (64), /* dst_mask */
1278 FALSE), /* pcrel_offset */
1279
1280 /* A 16 bit dtprel reloc. */
1281 HOWTO (R_PPC64_DTPREL16,
1282 0, /* rightshift */
1283 1, /* size (0 = byte, 1 = short, 2 = long) */
1284 16, /* bitsize */
1285 FALSE, /* pc_relative */
1286 0, /* bitpos */
1287 complain_overflow_signed, /* complain_on_overflow */
1288 ppc64_elf_unhandled_reloc, /* special_function */
1289 "R_PPC64_DTPREL16", /* name */
1290 FALSE, /* partial_inplace */
1291 0, /* src_mask */
1292 0xffff, /* dst_mask */
1293 FALSE), /* pcrel_offset */
1294
1295 /* Like DTPREL16, but no overflow. */
1296 HOWTO (R_PPC64_DTPREL16_LO,
1297 0, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 ppc64_elf_unhandled_reloc, /* special_function */
1304 "R_PPC64_DTPREL16_LO", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1311 HOWTO (R_PPC64_DTPREL16_HI,
1312 16, /* rightshift */
1313 1, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_dont, /* complain_on_overflow */
1318 ppc64_elf_unhandled_reloc, /* special_function */
1319 "R_PPC64_DTPREL16_HI", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1326 HOWTO (R_PPC64_DTPREL16_HA,
1327 16, /* rightshift */
1328 1, /* size (0 = byte, 1 = short, 2 = long) */
1329 16, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL16_HA", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 0xffff, /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1341 HOWTO (R_PPC64_DTPREL16_HIGHER,
1342 32, /* rightshift */
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1344 16, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_dont, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16_HIGHER", /* name */
1350 FALSE, /* partial_inplace */
1351 0, /* src_mask */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1356 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1357 32, /* rightshift */
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_HIGHERA", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1371 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1372 48, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HIGHEST", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1387 48, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16, but for insns with a DS field. */
1401 HOWTO (R_PPC64_DTPREL16_DS,
1402 0, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_signed, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_DS", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xfffc, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_DS, but no overflow. */
1416 HOWTO (R_PPC64_DTPREL16_LO_DS,
1417 0, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_LO_DS", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xfffc, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Computes a tp-relative displacement, the difference between the value of
1431 sym+add and the value of the thread pointer (r13). */
1432 HOWTO (R_PPC64_TPREL64,
1433 0, /* rightshift */
1434 4, /* size (0 = byte, 1 = short, 2 = long) */
1435 64, /* bitsize */
1436 FALSE, /* pc_relative */
1437 0, /* bitpos */
1438 complain_overflow_dont, /* complain_on_overflow */
1439 ppc64_elf_unhandled_reloc, /* special_function */
1440 "R_PPC64_TPREL64", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 ONES (64), /* dst_mask */
1444 FALSE), /* pcrel_offset */
1445
1446 /* A 16 bit tprel reloc. */
1447 HOWTO (R_PPC64_TPREL16,
1448 0, /* rightshift */
1449 1, /* size (0 = byte, 1 = short, 2 = long) */
1450 16, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_signed, /* complain_on_overflow */
1454 ppc64_elf_unhandled_reloc, /* special_function */
1455 "R_PPC64_TPREL16", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0xffff, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* Like TPREL16, but no overflow. */
1462 HOWTO (R_PPC64_TPREL16_LO,
1463 0, /* rightshift */
1464 1, /* size (0 = byte, 1 = short, 2 = long) */
1465 16, /* bitsize */
1466 FALSE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_dont, /* complain_on_overflow */
1469 ppc64_elf_unhandled_reloc, /* special_function */
1470 "R_PPC64_TPREL16_LO", /* name */
1471 FALSE, /* partial_inplace */
1472 0, /* src_mask */
1473 0xffff, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1475
1476 /* Like TPREL16_LO, but next higher group of 16 bits. */
1477 HOWTO (R_PPC64_TPREL16_HI,
1478 16, /* rightshift */
1479 1, /* size (0 = byte, 1 = short, 2 = long) */
1480 16, /* bitsize */
1481 FALSE, /* pc_relative */
1482 0, /* bitpos */
1483 complain_overflow_dont, /* complain_on_overflow */
1484 ppc64_elf_unhandled_reloc, /* special_function */
1485 "R_PPC64_TPREL16_HI", /* name */
1486 FALSE, /* partial_inplace */
1487 0, /* src_mask */
1488 0xffff, /* dst_mask */
1489 FALSE), /* pcrel_offset */
1490
1491 /* Like TPREL16_HI, but adjust for low 16 bits. */
1492 HOWTO (R_PPC64_TPREL16_HA,
1493 16, /* rightshift */
1494 1, /* size (0 = byte, 1 = short, 2 = long) */
1495 16, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL16_HA", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 0xffff, /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* Like TPREL16_HI, but next higher group of 16 bits. */
1507 HOWTO (R_PPC64_TPREL16_HIGHER,
1508 32, /* rightshift */
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_dont, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16_HIGHER", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1522 HOWTO (R_PPC64_TPREL16_HIGHERA,
1523 32, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_HIGHERA", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1537 HOWTO (R_PPC64_TPREL16_HIGHEST,
1538 48, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1540 16, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HIGHEST", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1553 48, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HIGHESTA", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16, but for insns with a DS field. */
1567 HOWTO (R_PPC64_TPREL16_DS,
1568 0, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_signed, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_DS", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xfffc, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_DS, but no overflow. */
1582 HOWTO (R_PPC64_TPREL16_LO_DS,
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_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_LO_DS", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xfffc, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1597 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1598 to the first entry relative to the TOC base (r2). */
1599 HOWTO (R_PPC64_GOT_TLSGD16,
1600 0, /* rightshift */
1601 1, /* size (0 = byte, 1 = short, 2 = long) */
1602 16, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_signed, /* complain_on_overflow */
1606 ppc64_elf_unhandled_reloc, /* special_function */
1607 "R_PPC64_GOT_TLSGD16", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0xffff, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Like GOT_TLSGD16, but no overflow. */
1614 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1615 0, /* rightshift */
1616 1, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_dont, /* complain_on_overflow */
1621 ppc64_elf_unhandled_reloc, /* special_function */
1622 "R_PPC64_GOT_TLSGD16_LO", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0xffff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627
1628 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1629 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1630 16, /* rightshift */
1631 1, /* size (0 = byte, 1 = short, 2 = long) */
1632 16, /* bitsize */
1633 FALSE, /* pc_relative */
1634 0, /* bitpos */
1635 complain_overflow_dont, /* complain_on_overflow */
1636 ppc64_elf_unhandled_reloc, /* special_function */
1637 "R_PPC64_GOT_TLSGD16_HI", /* name */
1638 FALSE, /* partial_inplace */
1639 0, /* src_mask */
1640 0xffff, /* dst_mask */
1641 FALSE), /* pcrel_offset */
1642
1643 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1644 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1645 16, /* rightshift */
1646 1, /* size (0 = byte, 1 = short, 2 = long) */
1647 16, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_dont, /* complain_on_overflow */
1651 ppc64_elf_unhandled_reloc, /* special_function */
1652 "R_PPC64_GOT_TLSGD16_HA", /* name */
1653 FALSE, /* partial_inplace */
1654 0, /* src_mask */
1655 0xffff, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1659 with values (sym+add)@dtpmod and zero, and computes the offset to the
1660 first entry relative to the TOC base (r2). */
1661 HOWTO (R_PPC64_GOT_TLSLD16,
1662 0, /* rightshift */
1663 1, /* size (0 = byte, 1 = short, 2 = long) */
1664 16, /* bitsize */
1665 FALSE, /* pc_relative */
1666 0, /* bitpos */
1667 complain_overflow_signed, /* complain_on_overflow */
1668 ppc64_elf_unhandled_reloc, /* special_function */
1669 "R_PPC64_GOT_TLSLD16", /* name */
1670 FALSE, /* partial_inplace */
1671 0, /* src_mask */
1672 0xffff, /* dst_mask */
1673 FALSE), /* pcrel_offset */
1674
1675 /* Like GOT_TLSLD16, but no overflow. */
1676 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1677 0, /* rightshift */
1678 1, /* size (0 = byte, 1 = short, 2 = long) */
1679 16, /* bitsize */
1680 FALSE, /* pc_relative */
1681 0, /* bitpos */
1682 complain_overflow_dont, /* complain_on_overflow */
1683 ppc64_elf_unhandled_reloc, /* special_function */
1684 "R_PPC64_GOT_TLSLD16_LO", /* name */
1685 FALSE, /* partial_inplace */
1686 0, /* src_mask */
1687 0xffff, /* dst_mask */
1688 FALSE), /* pcrel_offset */
1689
1690 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1691 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1692 16, /* rightshift */
1693 1, /* size (0 = byte, 1 = short, 2 = long) */
1694 16, /* bitsize */
1695 FALSE, /* pc_relative */
1696 0, /* bitpos */
1697 complain_overflow_dont, /* complain_on_overflow */
1698 ppc64_elf_unhandled_reloc, /* special_function */
1699 "R_PPC64_GOT_TLSLD16_HI", /* name */
1700 FALSE, /* partial_inplace */
1701 0, /* src_mask */
1702 0xffff, /* dst_mask */
1703 FALSE), /* pcrel_offset */
1704
1705 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1706 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1707 16, /* rightshift */
1708 1, /* size (0 = byte, 1 = short, 2 = long) */
1709 16, /* bitsize */
1710 FALSE, /* pc_relative */
1711 0, /* bitpos */
1712 complain_overflow_dont, /* complain_on_overflow */
1713 ppc64_elf_unhandled_reloc, /* special_function */
1714 "R_PPC64_GOT_TLSLD16_HA", /* name */
1715 FALSE, /* partial_inplace */
1716 0, /* src_mask */
1717 0xffff, /* dst_mask */
1718 FALSE), /* pcrel_offset */
1719
1720 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1721 the offset to the entry relative to the TOC base (r2). */
1722 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1723 0, /* rightshift */
1724 1, /* size (0 = byte, 1 = short, 2 = long) */
1725 16, /* bitsize */
1726 FALSE, /* pc_relative */
1727 0, /* bitpos */
1728 complain_overflow_signed, /* complain_on_overflow */
1729 ppc64_elf_unhandled_reloc, /* special_function */
1730 "R_PPC64_GOT_DTPREL16_DS", /* name */
1731 FALSE, /* partial_inplace */
1732 0, /* src_mask */
1733 0xfffc, /* dst_mask */
1734 FALSE), /* pcrel_offset */
1735
1736 /* Like GOT_DTPREL16_DS, but no overflow. */
1737 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1738 0, /* rightshift */
1739 1, /* size (0 = byte, 1 = short, 2 = long) */
1740 16, /* bitsize */
1741 FALSE, /* pc_relative */
1742 0, /* bitpos */
1743 complain_overflow_dont, /* complain_on_overflow */
1744 ppc64_elf_unhandled_reloc, /* special_function */
1745 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1746 FALSE, /* partial_inplace */
1747 0, /* src_mask */
1748 0xfffc, /* dst_mask */
1749 FALSE), /* pcrel_offset */
1750
1751 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1752 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1753 16, /* rightshift */
1754 1, /* size (0 = byte, 1 = short, 2 = long) */
1755 16, /* bitsize */
1756 FALSE, /* pc_relative */
1757 0, /* bitpos */
1758 complain_overflow_dont, /* complain_on_overflow */
1759 ppc64_elf_unhandled_reloc, /* special_function */
1760 "R_PPC64_GOT_DTPREL16_HI", /* name */
1761 FALSE, /* partial_inplace */
1762 0, /* src_mask */
1763 0xffff, /* dst_mask */
1764 FALSE), /* pcrel_offset */
1765
1766 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1767 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1768 16, /* rightshift */
1769 1, /* size (0 = byte, 1 = short, 2 = long) */
1770 16, /* bitsize */
1771 FALSE, /* pc_relative */
1772 0, /* bitpos */
1773 complain_overflow_dont, /* complain_on_overflow */
1774 ppc64_elf_unhandled_reloc, /* special_function */
1775 "R_PPC64_GOT_DTPREL16_HA", /* name */
1776 FALSE, /* partial_inplace */
1777 0, /* src_mask */
1778 0xffff, /* dst_mask */
1779 FALSE), /* pcrel_offset */
1780
1781 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1782 offset to the entry relative to the TOC base (r2). */
1783 HOWTO (R_PPC64_GOT_TPREL16_DS,
1784 0, /* rightshift */
1785 1, /* size (0 = byte, 1 = short, 2 = long) */
1786 16, /* bitsize */
1787 FALSE, /* pc_relative */
1788 0, /* bitpos */
1789 complain_overflow_signed, /* complain_on_overflow */
1790 ppc64_elf_unhandled_reloc, /* special_function */
1791 "R_PPC64_GOT_TPREL16_DS", /* name */
1792 FALSE, /* partial_inplace */
1793 0, /* src_mask */
1794 0xfffc, /* dst_mask */
1795 FALSE), /* pcrel_offset */
1796
1797 /* Like GOT_TPREL16_DS, but no overflow. */
1798 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1799 0, /* rightshift */
1800 1, /* size (0 = byte, 1 = short, 2 = long) */
1801 16, /* bitsize */
1802 FALSE, /* pc_relative */
1803 0, /* bitpos */
1804 complain_overflow_dont, /* complain_on_overflow */
1805 ppc64_elf_unhandled_reloc, /* special_function */
1806 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1807 FALSE, /* partial_inplace */
1808 0, /* src_mask */
1809 0xfffc, /* dst_mask */
1810 FALSE), /* pcrel_offset */
1811
1812 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1813 HOWTO (R_PPC64_GOT_TPREL16_HI,
1814 16, /* rightshift */
1815 1, /* size (0 = byte, 1 = short, 2 = long) */
1816 16, /* bitsize */
1817 FALSE, /* pc_relative */
1818 0, /* bitpos */
1819 complain_overflow_dont, /* complain_on_overflow */
1820 ppc64_elf_unhandled_reloc, /* special_function */
1821 "R_PPC64_GOT_TPREL16_HI", /* name */
1822 FALSE, /* partial_inplace */
1823 0, /* src_mask */
1824 0xffff, /* dst_mask */
1825 FALSE), /* pcrel_offset */
1826
1827 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1828 HOWTO (R_PPC64_GOT_TPREL16_HA,
1829 16, /* rightshift */
1830 1, /* size (0 = byte, 1 = short, 2 = long) */
1831 16, /* bitsize */
1832 FALSE, /* pc_relative */
1833 0, /* bitpos */
1834 complain_overflow_dont, /* complain_on_overflow */
1835 ppc64_elf_unhandled_reloc, /* special_function */
1836 "R_PPC64_GOT_TPREL16_HA", /* name */
1837 FALSE, /* partial_inplace */
1838 0, /* src_mask */
1839 0xffff, /* dst_mask */
1840 FALSE), /* pcrel_offset */
1841
1842 /* GNU extension to record C++ vtable hierarchy. */
1843 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1844 0, /* rightshift */
1845 0, /* size (0 = byte, 1 = short, 2 = long) */
1846 0, /* bitsize */
1847 FALSE, /* pc_relative */
1848 0, /* bitpos */
1849 complain_overflow_dont, /* complain_on_overflow */
1850 NULL, /* special_function */
1851 "R_PPC64_GNU_VTINHERIT", /* name */
1852 FALSE, /* partial_inplace */
1853 0, /* src_mask */
1854 0, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1856
1857 /* GNU extension to record C++ vtable member usage. */
1858 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1859 0, /* rightshift */
1860 0, /* size (0 = byte, 1 = short, 2 = long) */
1861 0, /* bitsize */
1862 FALSE, /* pc_relative */
1863 0, /* bitpos */
1864 complain_overflow_dont, /* complain_on_overflow */
1865 NULL, /* special_function */
1866 "R_PPC64_GNU_VTENTRY", /* name */
1867 FALSE, /* partial_inplace */
1868 0, /* src_mask */
1869 0, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1871 };
1872
1873 \f
1874 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1875 be done. */
1876
1877 static void
1878 ppc_howto_init (void)
1879 {
1880 unsigned int i, type;
1881
1882 for (i = 0;
1883 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1884 i++)
1885 {
1886 type = ppc64_elf_howto_raw[i].type;
1887 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1888 / sizeof (ppc64_elf_howto_table[0])));
1889 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1890 }
1891 }
1892
1893 static reloc_howto_type *
1894 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1895 bfd_reloc_code_real_type code)
1896 {
1897 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1898
1899 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1900 /* Initialize howto table if needed. */
1901 ppc_howto_init ();
1902
1903 switch (code)
1904 {
1905 default:
1906 return NULL;
1907
1908 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1909 break;
1910 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1911 break;
1912 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1913 break;
1914 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1915 break;
1916 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1917 break;
1918 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1919 break;
1920 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1921 break;
1922 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1923 break;
1924 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1925 break;
1926 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1927 break;
1928 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1929 break;
1930 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1931 break;
1932 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1933 break;
1934 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1935 break;
1936 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1937 break;
1938 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1939 break;
1940 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1941 break;
1942 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1943 break;
1944 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1945 break;
1946 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1947 break;
1948 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1949 break;
1950 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1951 break;
1952 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1953 break;
1954 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1955 break;
1956 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1957 break;
1958 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1959 break;
1960 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1961 break;
1962 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1963 break;
1964 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1965 break;
1966 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1967 break;
1968 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1969 break;
1970 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1971 break;
1972 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1973 break;
1974 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1975 break;
1976 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1977 break;
1978 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1979 break;
1980 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1981 break;
1982 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1983 break;
1984 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1985 break;
1986 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1987 break;
1988 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1989 break;
1990 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1991 break;
1992 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1993 break;
1994 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1995 break;
1996 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1997 break;
1998 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1999 break;
2000 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2001 break;
2002 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2003 break;
2004 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2005 break;
2006 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2007 break;
2008 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2009 break;
2010 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2011 break;
2012 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2013 break;
2014 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2015 break;
2016 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2017 break;
2018 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2019 break;
2020 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2021 break;
2022 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2023 break;
2024 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2025 break;
2026 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2027 break;
2028 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2029 break;
2030 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2031 break;
2032 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2033 break;
2034 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2035 break;
2036 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2037 break;
2038 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2039 break;
2040 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2041 break;
2042 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2043 break;
2044 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2045 break;
2046 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2047 break;
2048 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2049 break;
2050 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2051 break;
2052 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2053 break;
2054 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2065 break;
2066 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2067 break;
2068 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2069 break;
2070 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2071 break;
2072 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2073 break;
2074 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2075 break;
2076 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2077 break;
2078 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2079 break;
2080 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2081 break;
2082 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2083 break;
2084 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2085 break;
2086 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2087 break;
2088 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2089 break;
2090 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2091 break;
2092 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2093 break;
2094 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2095 break;
2096 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2097 break;
2098 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2099 break;
2100 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2101 break;
2102 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2103 break;
2104 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2105 break;
2106 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2107 break;
2108 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2109 break;
2110 }
2111
2112 return ppc64_elf_howto_table[r];
2113 };
2114
2115 static reloc_howto_type *
2116 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2117 const char *r_name)
2118 {
2119 unsigned int i;
2120
2121 for (i = 0;
2122 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2123 i++)
2124 if (ppc64_elf_howto_raw[i].name != NULL
2125 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2126 return &ppc64_elf_howto_raw[i];
2127
2128 return NULL;
2129 }
2130
2131 /* Set the howto pointer for a PowerPC ELF reloc. */
2132
2133 static void
2134 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2135 Elf_Internal_Rela *dst)
2136 {
2137 unsigned int type;
2138
2139 /* Initialize howto table if needed. */
2140 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2141 ppc_howto_init ();
2142
2143 type = ELF64_R_TYPE (dst->r_info);
2144 if (type >= (sizeof (ppc64_elf_howto_table)
2145 / sizeof (ppc64_elf_howto_table[0])))
2146 {
2147 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2148 abfd, (int) type);
2149 type = R_PPC64_NONE;
2150 }
2151 cache_ptr->howto = ppc64_elf_howto_table[type];
2152 }
2153
2154 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2155
2156 static bfd_reloc_status_type
2157 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2158 void *data, asection *input_section,
2159 bfd *output_bfd, char **error_message)
2160 {
2161 /* If this is a relocatable link (output_bfd test tells us), just
2162 call the generic function. Any adjustment will be done at final
2163 link time. */
2164 if (output_bfd != NULL)
2165 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2166 input_section, output_bfd, error_message);
2167
2168 /* Adjust the addend for sign extension of the low 16 bits.
2169 We won't actually be using the low 16 bits, so trashing them
2170 doesn't matter. */
2171 reloc_entry->addend += 0x8000;
2172 return bfd_reloc_continue;
2173 }
2174
2175 static bfd_reloc_status_type
2176 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2177 void *data, asection *input_section,
2178 bfd *output_bfd, char **error_message)
2179 {
2180 if (output_bfd != NULL)
2181 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2182 input_section, output_bfd, error_message);
2183
2184 if (strcmp (symbol->section->name, ".opd") == 0
2185 && (symbol->section->owner->flags & DYNAMIC) == 0)
2186 {
2187 bfd_vma dest = opd_entry_value (symbol->section,
2188 symbol->value + reloc_entry->addend,
2189 NULL, NULL);
2190 if (dest != (bfd_vma) -1)
2191 reloc_entry->addend = dest - (symbol->value
2192 + symbol->section->output_section->vma
2193 + symbol->section->output_offset);
2194 }
2195 return bfd_reloc_continue;
2196 }
2197
2198 static bfd_reloc_status_type
2199 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2200 void *data, asection *input_section,
2201 bfd *output_bfd, char **error_message)
2202 {
2203 long insn;
2204 enum elf_ppc64_reloc_type r_type;
2205 bfd_size_type octets;
2206 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2207 bfd_boolean is_power4 = FALSE;
2208
2209 /* If this is a relocatable link (output_bfd test tells us), just
2210 call the generic function. Any adjustment will be done at final
2211 link time. */
2212 if (output_bfd != NULL)
2213 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2214 input_section, output_bfd, error_message);
2215
2216 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2217 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2218 insn &= ~(0x01 << 21);
2219 r_type = reloc_entry->howto->type;
2220 if (r_type == R_PPC64_ADDR14_BRTAKEN
2221 || r_type == R_PPC64_REL14_BRTAKEN)
2222 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2223
2224 if (is_power4)
2225 {
2226 /* Set 'a' bit. This is 0b00010 in BO field for branch
2227 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2228 for branch on CTR insns (BO == 1a00t or 1a01t). */
2229 if ((insn & (0x14 << 21)) == (0x04 << 21))
2230 insn |= 0x02 << 21;
2231 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2232 insn |= 0x08 << 21;
2233 else
2234 goto out;
2235 }
2236 else
2237 {
2238 bfd_vma target = 0;
2239 bfd_vma from;
2240
2241 if (!bfd_is_com_section (symbol->section))
2242 target = symbol->value;
2243 target += symbol->section->output_section->vma;
2244 target += symbol->section->output_offset;
2245 target += reloc_entry->addend;
2246
2247 from = (reloc_entry->address
2248 + input_section->output_offset
2249 + input_section->output_section->vma);
2250
2251 /* Invert 'y' bit if not the default. */
2252 if ((bfd_signed_vma) (target - from) < 0)
2253 insn ^= 0x01 << 21;
2254 }
2255 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2256 out:
2257 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2258 input_section, output_bfd, error_message);
2259 }
2260
2261 static bfd_reloc_status_type
2262 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2263 void *data, asection *input_section,
2264 bfd *output_bfd, char **error_message)
2265 {
2266 /* If this is a relocatable link (output_bfd test tells us), just
2267 call the generic function. Any adjustment will be done at final
2268 link time. */
2269 if (output_bfd != NULL)
2270 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2271 input_section, output_bfd, error_message);
2272
2273 /* Subtract the symbol section base address. */
2274 reloc_entry->addend -= symbol->section->output_section->vma;
2275 return bfd_reloc_continue;
2276 }
2277
2278 static bfd_reloc_status_type
2279 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2280 void *data, asection *input_section,
2281 bfd *output_bfd, char **error_message)
2282 {
2283 /* If this is a relocatable link (output_bfd test tells us), just
2284 call the generic function. Any adjustment will be done at final
2285 link time. */
2286 if (output_bfd != NULL)
2287 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2288 input_section, output_bfd, error_message);
2289
2290 /* Subtract the symbol section base address. */
2291 reloc_entry->addend -= symbol->section->output_section->vma;
2292
2293 /* Adjust the addend for sign extension of the low 16 bits. */
2294 reloc_entry->addend += 0x8000;
2295 return bfd_reloc_continue;
2296 }
2297
2298 static bfd_reloc_status_type
2299 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2300 void *data, asection *input_section,
2301 bfd *output_bfd, char **error_message)
2302 {
2303 bfd_vma TOCstart;
2304
2305 /* If this is a relocatable link (output_bfd test tells us), just
2306 call the generic function. Any adjustment will be done at final
2307 link time. */
2308 if (output_bfd != NULL)
2309 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2310 input_section, output_bfd, error_message);
2311
2312 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2313 if (TOCstart == 0)
2314 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2315
2316 /* Subtract the TOC base address. */
2317 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2318 return bfd_reloc_continue;
2319 }
2320
2321 static bfd_reloc_status_type
2322 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2323 void *data, asection *input_section,
2324 bfd *output_bfd, char **error_message)
2325 {
2326 bfd_vma TOCstart;
2327
2328 /* If this is a relocatable link (output_bfd test tells us), just
2329 call the generic function. Any adjustment will be done at final
2330 link time. */
2331 if (output_bfd != NULL)
2332 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2333 input_section, output_bfd, error_message);
2334
2335 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2336 if (TOCstart == 0)
2337 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2338
2339 /* Subtract the TOC base address. */
2340 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2341
2342 /* Adjust the addend for sign extension of the low 16 bits. */
2343 reloc_entry->addend += 0x8000;
2344 return bfd_reloc_continue;
2345 }
2346
2347 static bfd_reloc_status_type
2348 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2349 void *data, asection *input_section,
2350 bfd *output_bfd, char **error_message)
2351 {
2352 bfd_vma TOCstart;
2353 bfd_size_type octets;
2354
2355 /* If this is a relocatable link (output_bfd test tells us), just
2356 call the generic function. Any adjustment will be done at final
2357 link time. */
2358 if (output_bfd != NULL)
2359 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2360 input_section, output_bfd, error_message);
2361
2362 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2363 if (TOCstart == 0)
2364 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2365
2366 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2367 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2368 return bfd_reloc_ok;
2369 }
2370
2371 static bfd_reloc_status_type
2372 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2373 void *data, asection *input_section,
2374 bfd *output_bfd, char **error_message)
2375 {
2376 /* If this is a relocatable link (output_bfd test tells us), just
2377 call the generic function. Any adjustment will be done at final
2378 link time. */
2379 if (output_bfd != NULL)
2380 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2381 input_section, output_bfd, error_message);
2382
2383 if (error_message != NULL)
2384 {
2385 static char buf[60];
2386 sprintf (buf, "generic linker can't handle %s",
2387 reloc_entry->howto->name);
2388 *error_message = buf;
2389 }
2390 return bfd_reloc_dangerous;
2391 }
2392
2393 struct ppc64_elf_obj_tdata
2394 {
2395 struct elf_obj_tdata elf;
2396
2397 /* Shortcuts to dynamic linker sections. */
2398 asection *got;
2399 asection *relgot;
2400
2401 /* Used during garbage collection. We attach global symbols defined
2402 on removed .opd entries to this section so that the sym is removed. */
2403 asection *deleted_section;
2404
2405 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2406 sections means we potentially need one of these for each input bfd. */
2407 union {
2408 bfd_signed_vma refcount;
2409 bfd_vma offset;
2410 } tlsld_got;
2411
2412 /* A copy of relocs before they are modified for --emit-relocs. */
2413 Elf_Internal_Rela *opd_relocs;
2414 };
2415
2416 #define ppc64_elf_tdata(bfd) \
2417 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2418
2419 #define ppc64_tlsld_got(bfd) \
2420 (&ppc64_elf_tdata (bfd)->tlsld_got)
2421
2422 /* Override the generic function because we store some extras. */
2423
2424 static bfd_boolean
2425 ppc64_elf_mkobject (bfd *abfd)
2426 {
2427 if (abfd->tdata.any == NULL)
2428 {
2429 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2430 abfd->tdata.any = bfd_zalloc (abfd, amt);
2431 if (abfd->tdata.any == NULL)
2432 return FALSE;
2433 }
2434 return bfd_elf_mkobject (abfd);
2435 }
2436
2437 /* Return 1 if target is one of ours. */
2438
2439 static bfd_boolean
2440 is_ppc64_elf_target (const struct bfd_target *targ)
2441 {
2442 extern const bfd_target bfd_elf64_powerpc_vec;
2443 extern const bfd_target bfd_elf64_powerpcle_vec;
2444
2445 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2446 }
2447
2448 /* Fix bad default arch selected for a 64 bit input bfd when the
2449 default is 32 bit. */
2450
2451 static bfd_boolean
2452 ppc64_elf_object_p (bfd *abfd)
2453 {
2454 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2455 {
2456 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2457
2458 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2459 {
2460 /* Relies on arch after 32 bit default being 64 bit default. */
2461 abfd->arch_info = abfd->arch_info->next;
2462 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2463 }
2464 }
2465 return TRUE;
2466 }
2467
2468 /* Support for core dump NOTE sections. */
2469
2470 static bfd_boolean
2471 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2472 {
2473 size_t offset, size;
2474
2475 if (note->descsz != 504)
2476 return FALSE;
2477
2478 /* pr_cursig */
2479 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2480
2481 /* pr_pid */
2482 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2483
2484 /* pr_reg */
2485 offset = 112;
2486 size = 384;
2487
2488 /* Make a ".reg/999" section. */
2489 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2490 size, note->descpos + offset);
2491 }
2492
2493 static bfd_boolean
2494 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2495 {
2496 if (note->descsz != 136)
2497 return FALSE;
2498
2499 elf_tdata (abfd)->core_program
2500 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2501 elf_tdata (abfd)->core_command
2502 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2503
2504 return TRUE;
2505 }
2506
2507 static char *
2508 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2509 ...)
2510 {
2511 switch (note_type)
2512 {
2513 default:
2514 return NULL;
2515
2516 case NT_PRPSINFO:
2517 {
2518 char data[136];
2519 va_list ap;
2520
2521 va_start (ap, note_type);
2522 memset (data, 0, 40);
2523 strncpy (data + 40, va_arg (ap, const char *), 16);
2524 strncpy (data + 56, va_arg (ap, const char *), 80);
2525 va_end (ap);
2526 return elfcore_write_note (abfd, buf, bufsiz,
2527 "CORE", note_type, data, sizeof (data));
2528 }
2529
2530 case NT_PRSTATUS:
2531 {
2532 char data[504];
2533 va_list ap;
2534 long pid;
2535 int cursig;
2536 const void *greg;
2537
2538 va_start (ap, note_type);
2539 memset (data, 0, 112);
2540 pid = va_arg (ap, long);
2541 bfd_put_32 (abfd, pid, data + 32);
2542 cursig = va_arg (ap, int);
2543 bfd_put_16 (abfd, cursig, data + 12);
2544 greg = va_arg (ap, const void *);
2545 memcpy (data + 112, greg, 384);
2546 memset (data + 496, 0, 8);
2547 va_end (ap);
2548 return elfcore_write_note (abfd, buf, bufsiz,
2549 "CORE", note_type, data, sizeof (data));
2550 }
2551 }
2552 }
2553
2554 /* Merge backend specific data from an object file to the output
2555 object file when linking. */
2556
2557 static bfd_boolean
2558 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2559 {
2560 /* Check if we have the same endianess. */
2561 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2562 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2563 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2564 {
2565 const char *msg;
2566
2567 if (bfd_big_endian (ibfd))
2568 msg = _("%B: compiled for a big endian system "
2569 "and target is little endian");
2570 else
2571 msg = _("%B: compiled for a little endian system "
2572 "and target is big endian");
2573
2574 (*_bfd_error_handler) (msg, ibfd);
2575
2576 bfd_set_error (bfd_error_wrong_format);
2577 return FALSE;
2578 }
2579
2580 return TRUE;
2581 }
2582
2583 /* Add extra PPC sections. */
2584
2585 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2586 {
2587 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2588 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2589 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2590 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2591 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2592 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2593 { NULL, 0, 0, 0, 0 }
2594 };
2595
2596 enum _ppc64_sec_type {
2597 sec_normal = 0,
2598 sec_opd = 1,
2599 sec_toc = 2
2600 };
2601
2602 struct _ppc64_elf_section_data
2603 {
2604 struct bfd_elf_section_data elf;
2605
2606 /* An array with one entry for each opd function descriptor. */
2607 union
2608 {
2609 /* Points to the function code section for local opd entries. */
2610 asection **opd_func_sec;
2611 /* After editing .opd, adjust references to opd local syms. */
2612 long *opd_adjust;
2613
2614 /* An array for toc sections, indexed by offset/8.
2615 Specifies the relocation symbol index used at a given toc offset. */
2616 unsigned *t_symndx;
2617 } u;
2618
2619 enum _ppc64_sec_type sec_type:2;
2620
2621 /* Flag set when small branches are detected. Used to
2622 select suitable defaults for the stub group size. */
2623 unsigned int has_14bit_branch:1;
2624 };
2625
2626 #define ppc64_elf_section_data(sec) \
2627 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2628
2629 static bfd_boolean
2630 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2631 {
2632 if (!sec->used_by_bfd)
2633 {
2634 struct _ppc64_elf_section_data *sdata;
2635 bfd_size_type amt = sizeof (*sdata);
2636
2637 sdata = bfd_zalloc (abfd, amt);
2638 if (sdata == NULL)
2639 return FALSE;
2640 sec->used_by_bfd = sdata;
2641 }
2642
2643 return _bfd_elf_new_section_hook (abfd, sec);
2644 }
2645
2646 static void *
2647 get_opd_info (asection * sec)
2648 {
2649 if (sec != NULL
2650 && ppc64_elf_section_data (sec) != NULL
2651 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2652 return ppc64_elf_section_data (sec)->u.opd_adjust;
2653 return NULL;
2654 }
2655 \f
2656 /* Parameters for the qsort hook. */
2657 static asection *synthetic_opd;
2658 static bfd_boolean synthetic_relocatable;
2659
2660 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2661
2662 static int
2663 compare_symbols (const void *ap, const void *bp)
2664 {
2665 const asymbol *a = * (const asymbol **) ap;
2666 const asymbol *b = * (const asymbol **) bp;
2667
2668 /* Section symbols first. */
2669 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2670 return -1;
2671 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2672 return 1;
2673
2674 /* then .opd symbols. */
2675 if (a->section == synthetic_opd && b->section != synthetic_opd)
2676 return -1;
2677 if (a->section != synthetic_opd && b->section == synthetic_opd)
2678 return 1;
2679
2680 /* then other code symbols. */
2681 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2682 == (SEC_CODE | SEC_ALLOC)
2683 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2684 != (SEC_CODE | SEC_ALLOC))
2685 return -1;
2686
2687 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2688 != (SEC_CODE | SEC_ALLOC)
2689 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2690 == (SEC_CODE | SEC_ALLOC))
2691 return 1;
2692
2693 if (synthetic_relocatable)
2694 {
2695 if (a->section->id < b->section->id)
2696 return -1;
2697
2698 if (a->section->id > b->section->id)
2699 return 1;
2700 }
2701
2702 if (a->value + a->section->vma < b->value + b->section->vma)
2703 return -1;
2704
2705 if (a->value + a->section->vma > b->value + b->section->vma)
2706 return 1;
2707
2708 /* For syms with the same value, prefer strong dynamic global function
2709 syms over other syms. */
2710 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2711 return -1;
2712
2713 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2714 return 1;
2715
2716 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2717 return -1;
2718
2719 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2720 return 1;
2721
2722 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2723 return -1;
2724
2725 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2726 return 1;
2727
2728 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2729 return -1;
2730
2731 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2732 return 1;
2733
2734 return 0;
2735 }
2736
2737 /* Search SYMS for a symbol of the given VALUE. */
2738
2739 static asymbol *
2740 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2741 {
2742 long mid;
2743
2744 if (id == -1)
2745 {
2746 while (lo < hi)
2747 {
2748 mid = (lo + hi) >> 1;
2749 if (syms[mid]->value + syms[mid]->section->vma < value)
2750 lo = mid + 1;
2751 else if (syms[mid]->value + syms[mid]->section->vma > value)
2752 hi = mid;
2753 else
2754 return syms[mid];
2755 }
2756 }
2757 else
2758 {
2759 while (lo < hi)
2760 {
2761 mid = (lo + hi) >> 1;
2762 if (syms[mid]->section->id < id)
2763 lo = mid + 1;
2764 else if (syms[mid]->section->id > id)
2765 hi = mid;
2766 else if (syms[mid]->value < value)
2767 lo = mid + 1;
2768 else if (syms[mid]->value > value)
2769 hi = mid;
2770 else
2771 return syms[mid];
2772 }
2773 }
2774 return NULL;
2775 }
2776
2777 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2778 entry syms. */
2779
2780 static long
2781 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2782 long static_count, asymbol **static_syms,
2783 long dyn_count, asymbol **dyn_syms,
2784 asymbol **ret)
2785 {
2786 asymbol *s;
2787 long i;
2788 long count;
2789 char *names;
2790 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2791 asection *opd;
2792 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2793 asymbol **syms;
2794
2795 *ret = NULL;
2796
2797 opd = bfd_get_section_by_name (abfd, ".opd");
2798 if (opd == NULL)
2799 return 0;
2800
2801 symcount = static_count;
2802 if (!relocatable)
2803 symcount += dyn_count;
2804 if (symcount == 0)
2805 return 0;
2806
2807 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2808 if (syms == NULL)
2809 return -1;
2810
2811 if (!relocatable && static_count != 0 && dyn_count != 0)
2812 {
2813 /* Use both symbol tables. */
2814 memcpy (syms, static_syms, static_count * sizeof (*syms));
2815 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2816 }
2817 else if (!relocatable && static_count == 0)
2818 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2819 else
2820 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2821
2822 synthetic_opd = opd;
2823 synthetic_relocatable = relocatable;
2824 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2825
2826 if (!relocatable && symcount > 1)
2827 {
2828 long j;
2829 /* Trim duplicate syms, since we may have merged the normal and
2830 dynamic symbols. Actually, we only care about syms that have
2831 different values, so trim any with the same value. */
2832 for (i = 1, j = 1; i < symcount; ++i)
2833 if (syms[i - 1]->value + syms[i - 1]->section->vma
2834 != syms[i]->value + syms[i]->section->vma)
2835 syms[j++] = syms[i];
2836 symcount = j;
2837 }
2838
2839 i = 0;
2840 if (syms[i]->section == opd)
2841 ++i;
2842 codesecsym = i;
2843
2844 for (; i < symcount; ++i)
2845 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2846 != (SEC_CODE | SEC_ALLOC))
2847 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2848 break;
2849 codesecsymend = i;
2850
2851 for (; i < symcount; ++i)
2852 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2853 break;
2854 secsymend = i;
2855
2856 for (; i < symcount; ++i)
2857 if (syms[i]->section != opd)
2858 break;
2859 opdsymend = i;
2860
2861 for (; i < symcount; ++i)
2862 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2863 != (SEC_CODE | SEC_ALLOC))
2864 break;
2865 symcount = i;
2866
2867 count = 0;
2868 if (opdsymend == secsymend)
2869 goto done;
2870
2871 if (relocatable)
2872 {
2873 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2874 arelent *r;
2875 size_t size;
2876 long relcount;
2877
2878 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2879 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2880 if (relcount == 0)
2881 goto done;
2882
2883 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2884 {
2885 count = -1;
2886 goto done;
2887 }
2888
2889 size = 0;
2890 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2891 {
2892 asymbol *sym;
2893
2894 while (r < opd->relocation + relcount
2895 && r->address < syms[i]->value + opd->vma)
2896 ++r;
2897
2898 if (r == opd->relocation + relcount)
2899 break;
2900
2901 if (r->address != syms[i]->value + opd->vma)
2902 continue;
2903
2904 if (r->howto->type != R_PPC64_ADDR64)
2905 continue;
2906
2907 sym = *r->sym_ptr_ptr;
2908 if (!sym_exists_at (syms, opdsymend, symcount,
2909 sym->section->id, sym->value + r->addend))
2910 {
2911 ++count;
2912 size += sizeof (asymbol);
2913 size += strlen (syms[i]->name) + 2;
2914 }
2915 }
2916
2917 s = *ret = bfd_malloc (size);
2918 if (s == NULL)
2919 {
2920 count = -1;
2921 goto done;
2922 }
2923
2924 names = (char *) (s + count);
2925
2926 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2927 {
2928 asymbol *sym;
2929
2930 while (r < opd->relocation + relcount
2931 && r->address < syms[i]->value + opd->vma)
2932 ++r;
2933
2934 if (r == opd->relocation + relcount)
2935 break;
2936
2937 if (r->address != syms[i]->value + opd->vma)
2938 continue;
2939
2940 if (r->howto->type != R_PPC64_ADDR64)
2941 continue;
2942
2943 sym = *r->sym_ptr_ptr;
2944 if (!sym_exists_at (syms, opdsymend, symcount,
2945 sym->section->id, sym->value + r->addend))
2946 {
2947 size_t len;
2948
2949 *s = *syms[i];
2950 s->section = sym->section;
2951 s->value = sym->value + r->addend;
2952 s->name = names;
2953 *names++ = '.';
2954 len = strlen (syms[i]->name);
2955 memcpy (names, syms[i]->name, len + 1);
2956 names += len + 1;
2957 s++;
2958 }
2959 }
2960 }
2961 else
2962 {
2963 bfd_byte *contents;
2964 size_t size;
2965
2966 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2967 {
2968 if (contents)
2969 {
2970 free_contents_and_exit:
2971 free (contents);
2972 }
2973 count = -1;
2974 goto done;
2975 }
2976
2977 size = 0;
2978 for (i = secsymend; i < opdsymend; ++i)
2979 {
2980 bfd_vma ent;
2981
2982 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2983 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2984 {
2985 ++count;
2986 size += sizeof (asymbol);
2987 size += strlen (syms[i]->name) + 2;
2988 }
2989 }
2990
2991 s = *ret = bfd_malloc (size);
2992 if (s == NULL)
2993 goto free_contents_and_exit;
2994
2995 names = (char *) (s + count);
2996
2997 for (i = secsymend; i < opdsymend; ++i)
2998 {
2999 bfd_vma ent;
3000
3001 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3002 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3003 {
3004 long lo, hi;
3005 size_t len;
3006 asection *sec = abfd->sections;
3007
3008 *s = *syms[i];
3009 lo = codesecsym;
3010 hi = codesecsymend;
3011 while (lo < hi)
3012 {
3013 long mid = (lo + hi) >> 1;
3014 if (syms[mid]->section->vma < ent)
3015 lo = mid + 1;
3016 else if (syms[mid]->section->vma > ent)
3017 hi = mid;
3018 else
3019 {
3020 sec = syms[mid]->section;
3021 break;
3022 }
3023 }
3024
3025 if (lo >= hi && lo > codesecsym)
3026 sec = syms[lo - 1]->section;
3027
3028 for (; sec != NULL; sec = sec->next)
3029 {
3030 if (sec->vma > ent)
3031 break;
3032 if ((sec->flags & SEC_ALLOC) == 0
3033 || (sec->flags & SEC_LOAD) == 0)
3034 break;
3035 if ((sec->flags & SEC_CODE) != 0)
3036 s->section = sec;
3037 }
3038 s->value = ent - s->section->vma;
3039 s->name = names;
3040 *names++ = '.';
3041 len = strlen (syms[i]->name);
3042 memcpy (names, syms[i]->name, len + 1);
3043 names += len + 1;
3044 s++;
3045 }
3046 }
3047 free (contents);
3048 }
3049
3050 done:
3051 free (syms);
3052 return count;
3053 }
3054 \f
3055 /* The following functions are specific to the ELF linker, while
3056 functions above are used generally. Those named ppc64_elf_* are
3057 called by the main ELF linker code. They appear in this file more
3058 or less in the order in which they are called. eg.
3059 ppc64_elf_check_relocs is called early in the link process,
3060 ppc64_elf_finish_dynamic_sections is one of the last functions
3061 called.
3062
3063 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3064 functions have both a function code symbol and a function descriptor
3065 symbol. A call to foo in a relocatable object file looks like:
3066
3067 . .text
3068 . x:
3069 . bl .foo
3070 . nop
3071
3072 The function definition in another object file might be:
3073
3074 . .section .opd
3075 . foo: .quad .foo
3076 . .quad .TOC.@tocbase
3077 . .quad 0
3078 .
3079 . .text
3080 . .foo: blr
3081
3082 When the linker resolves the call during a static link, the branch
3083 unsurprisingly just goes to .foo and the .opd information is unused.
3084 If the function definition is in a shared library, things are a little
3085 different: The call goes via a plt call stub, the opd information gets
3086 copied to the plt, and the linker patches the nop.
3087
3088 . x:
3089 . bl .foo_stub
3090 . ld 2,40(1)
3091 .
3092 .
3093 . .foo_stub:
3094 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3095 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3096 . std 2,40(1) # this is the general idea
3097 . ld 11,0(12)
3098 . ld 2,8(12)
3099 . mtctr 11
3100 . ld 11,16(12)
3101 . bctr
3102 .
3103 . .section .plt
3104 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3105
3106 The "reloc ()" notation is supposed to indicate that the linker emits
3107 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3108 copying.
3109
3110 What are the difficulties here? Well, firstly, the relocations
3111 examined by the linker in check_relocs are against the function code
3112 sym .foo, while the dynamic relocation in the plt is emitted against
3113 the function descriptor symbol, foo. Somewhere along the line, we need
3114 to carefully copy dynamic link information from one symbol to the other.
3115 Secondly, the generic part of the elf linker will make .foo a dynamic
3116 symbol as is normal for most other backends. We need foo dynamic
3117 instead, at least for an application final link. However, when
3118 creating a shared library containing foo, we need to have both symbols
3119 dynamic so that references to .foo are satisfied during the early
3120 stages of linking. Otherwise the linker might decide to pull in a
3121 definition from some other object, eg. a static library.
3122
3123 Update: As of August 2004, we support a new convention. Function
3124 calls may use the function descriptor symbol, ie. "bl foo". This
3125 behaves exactly as "bl .foo". */
3126
3127 /* The linker needs to keep track of the number of relocs that it
3128 decides to copy as dynamic relocs in check_relocs for each symbol.
3129 This is so that it can later discard them if they are found to be
3130 unnecessary. We store the information in a field extending the
3131 regular ELF linker hash table. */
3132
3133 struct ppc_dyn_relocs
3134 {
3135 struct ppc_dyn_relocs *next;
3136
3137 /* The input section of the reloc. */
3138 asection *sec;
3139
3140 /* Total number of relocs copied for the input section. */
3141 bfd_size_type count;
3142
3143 /* Number of pc-relative relocs copied for the input section. */
3144 bfd_size_type pc_count;
3145 };
3146
3147 /* Track GOT entries needed for a given symbol. We might need more
3148 than one got entry per symbol. */
3149 struct got_entry
3150 {
3151 struct got_entry *next;
3152
3153 /* The symbol addend that we'll be placing in the GOT. */
3154 bfd_vma addend;
3155
3156 /* Unlike other ELF targets, we use separate GOT entries for the same
3157 symbol referenced from different input files. This is to support
3158 automatic multiple TOC/GOT sections, where the TOC base can vary
3159 from one input file to another.
3160
3161 Point to the BFD owning this GOT entry. */
3162 bfd *owner;
3163
3164 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3165 TLS_TPREL or TLS_DTPREL for tls entries. */
3166 char tls_type;
3167
3168 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3169 union
3170 {
3171 bfd_signed_vma refcount;
3172 bfd_vma offset;
3173 } got;
3174 };
3175
3176 /* The same for PLT. */
3177 struct plt_entry
3178 {
3179 struct plt_entry *next;
3180
3181 bfd_vma addend;
3182
3183 union
3184 {
3185 bfd_signed_vma refcount;
3186 bfd_vma offset;
3187 } plt;
3188 };
3189
3190 /* Of those relocs that might be copied as dynamic relocs, this macro
3191 selects those that must be copied when linking a shared library,
3192 even when the symbol is local. */
3193
3194 #define MUST_BE_DYN_RELOC(RTYPE) \
3195 ((RTYPE) != R_PPC64_REL32 \
3196 && (RTYPE) != R_PPC64_REL64 \
3197 && (RTYPE) != R_PPC64_REL30)
3198
3199 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3200 copying dynamic variables from a shared lib into an app's dynbss
3201 section, and instead use a dynamic relocation to point into the
3202 shared lib. With code that gcc generates, it's vital that this be
3203 enabled; In the PowerPC64 ABI, the address of a function is actually
3204 the address of a function descriptor, which resides in the .opd
3205 section. gcc uses the descriptor directly rather than going via the
3206 GOT as some other ABI's do, which means that initialized function
3207 pointers must reference the descriptor. Thus, a function pointer
3208 initialized to the address of a function in a shared library will
3209 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3210 redefines the function descriptor symbol to point to the copy. This
3211 presents a problem as a plt entry for that function is also
3212 initialized from the function descriptor symbol and the copy reloc
3213 may not be initialized first. */
3214 #define ELIMINATE_COPY_RELOCS 1
3215
3216 /* Section name for stubs is the associated section name plus this
3217 string. */
3218 #define STUB_SUFFIX ".stub"
3219
3220 /* Linker stubs.
3221 ppc_stub_long_branch:
3222 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3223 destination, but a 24 bit branch in a stub section will reach.
3224 . b dest
3225
3226 ppc_stub_plt_branch:
3227 Similar to the above, but a 24 bit branch in the stub section won't
3228 reach its destination.
3229 . addis %r12,%r2,xxx@toc@ha
3230 . ld %r11,xxx@toc@l(%r12)
3231 . mtctr %r11
3232 . bctr
3233
3234 ppc_stub_plt_call:
3235 Used to call a function in a shared library. If it so happens that
3236 the plt entry referenced crosses a 64k boundary, then an extra
3237 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3238 xxx+16 as appropriate.
3239 . addis %r12,%r2,xxx@toc@ha
3240 . std %r2,40(%r1)
3241 . ld %r11,xxx+0@toc@l(%r12)
3242 . ld %r2,xxx+8@toc@l(%r12)
3243 . mtctr %r11
3244 . ld %r11,xxx+16@toc@l(%r12)
3245 . bctr
3246
3247 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3248 code to adjust the value and save r2 to support multiple toc sections.
3249 A ppc_stub_long_branch with an r2 offset looks like:
3250 . std %r2,40(%r1)
3251 . addis %r2,%r2,off@ha
3252 . addi %r2,%r2,off@l
3253 . b dest
3254
3255 A ppc_stub_plt_branch with an r2 offset looks like:
3256 . std %r2,40(%r1)
3257 . addis %r12,%r2,xxx@toc@ha
3258 . ld %r11,xxx@toc@l(%r12)
3259 . addis %r2,%r2,off@ha
3260 . addi %r2,%r2,off@l
3261 . mtctr %r11
3262 . bctr
3263 */
3264
3265 enum ppc_stub_type {
3266 ppc_stub_none,
3267 ppc_stub_long_branch,
3268 ppc_stub_long_branch_r2off,
3269 ppc_stub_plt_branch,
3270 ppc_stub_plt_branch_r2off,
3271 ppc_stub_plt_call
3272 };
3273
3274 struct ppc_stub_hash_entry {
3275
3276 /* Base hash table entry structure. */
3277 struct bfd_hash_entry root;
3278
3279 enum ppc_stub_type stub_type;
3280
3281 /* The stub section. */
3282 asection *stub_sec;
3283
3284 /* Offset within stub_sec of the beginning of this stub. */
3285 bfd_vma stub_offset;
3286
3287 /* Given the symbol's value and its section we can determine its final
3288 value when building the stubs (so the stub knows where to jump. */
3289 bfd_vma target_value;
3290 asection *target_section;
3291
3292 /* The symbol table entry, if any, that this was derived from. */
3293 struct ppc_link_hash_entry *h;
3294
3295 /* And the reloc addend that this was derived from. */
3296 bfd_vma addend;
3297
3298 /* Where this stub is being called from, or, in the case of combined
3299 stub sections, the first input section in the group. */
3300 asection *id_sec;
3301 };
3302
3303 struct ppc_branch_hash_entry {
3304
3305 /* Base hash table entry structure. */
3306 struct bfd_hash_entry root;
3307
3308 /* Offset within branch lookup table. */
3309 unsigned int offset;
3310
3311 /* Generation marker. */
3312 unsigned int iter;
3313 };
3314
3315 struct ppc_link_hash_entry
3316 {
3317 struct elf_link_hash_entry elf;
3318
3319 union {
3320 /* A pointer to the most recently used stub hash entry against this
3321 symbol. */
3322 struct ppc_stub_hash_entry *stub_cache;
3323
3324 /* A pointer to the next symbol starting with a '.' */
3325 struct ppc_link_hash_entry *next_dot_sym;
3326 } u;
3327
3328 /* Track dynamic relocs copied for this symbol. */
3329 struct ppc_dyn_relocs *dyn_relocs;
3330
3331 /* Link between function code and descriptor symbols. */
3332 struct ppc_link_hash_entry *oh;
3333
3334 /* Flag function code and descriptor symbols. */
3335 unsigned int is_func:1;
3336 unsigned int is_func_descriptor:1;
3337 unsigned int fake:1;
3338
3339 /* Whether global opd/toc sym has been adjusted or not.
3340 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3341 should be set for all globals defined in any opd/toc section. */
3342 unsigned int adjust_done:1;
3343
3344 /* Set if we twiddled this symbol to weak at some stage. */
3345 unsigned int was_undefined:1;
3346
3347 /* Contexts in which symbol is used in the GOT (or TOC).
3348 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3349 corresponding relocs are encountered during check_relocs.
3350 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3351 indicate the corresponding GOT entry type is not needed.
3352 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3353 a TPREL one. We use a separate flag rather than setting TPREL
3354 just for convenience in distinguishing the two cases. */
3355 #define TLS_GD 1 /* GD reloc. */
3356 #define TLS_LD 2 /* LD reloc. */
3357 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3358 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3359 #define TLS_TLS 16 /* Any TLS reloc. */
3360 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3361 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3362 char tls_mask;
3363 };
3364
3365 /* ppc64 ELF linker hash table. */
3366
3367 struct ppc_link_hash_table
3368 {
3369 struct elf_link_hash_table elf;
3370
3371 /* The stub hash table. */
3372 struct bfd_hash_table stub_hash_table;
3373
3374 /* Another hash table for plt_branch stubs. */
3375 struct bfd_hash_table branch_hash_table;
3376
3377 /* Linker stub bfd. */
3378 bfd *stub_bfd;
3379
3380 /* Linker call-backs. */
3381 asection * (*add_stub_section) (const char *, asection *);
3382 void (*layout_sections_again) (void);
3383
3384 /* Array to keep track of which stub sections have been created, and
3385 information on stub grouping. */
3386 struct map_stub {
3387 /* This is the section to which stubs in the group will be attached. */
3388 asection *link_sec;
3389 /* The stub section. */
3390 asection *stub_sec;
3391 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3392 bfd_vma toc_off;
3393 } *stub_group;
3394
3395 /* Temp used when calculating TOC pointers. */
3396 bfd_vma toc_curr;
3397
3398 /* Highest input section id. */
3399 int top_id;
3400
3401 /* Highest output section index. */
3402 int top_index;
3403
3404 /* Used when adding symbols. */
3405 struct ppc_link_hash_entry *dot_syms;
3406
3407 /* List of input sections for each output section. */
3408 asection **input_list;
3409
3410 /* Short-cuts to get to dynamic linker sections. */
3411 asection *got;
3412 asection *plt;
3413 asection *relplt;
3414 asection *dynbss;
3415 asection *relbss;
3416 asection *glink;
3417 asection *sfpr;
3418 asection *brlt;
3419 asection *relbrlt;
3420
3421 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3422 struct ppc_link_hash_entry *tls_get_addr;
3423 struct ppc_link_hash_entry *tls_get_addr_fd;
3424
3425 /* Statistics. */
3426 unsigned long stub_count[ppc_stub_plt_call];
3427
3428 /* Number of stubs against global syms. */
3429 unsigned long stub_globals;
3430
3431 /* Set if we should emit symbols for stubs. */
3432 unsigned int emit_stub_syms:1;
3433
3434 /* Support for multiple toc sections. */
3435 unsigned int no_multi_toc:1;
3436 unsigned int multi_toc_needed:1;
3437
3438 /* Set on error. */
3439 unsigned int stub_error:1;
3440
3441 /* Temp used by ppc64_elf_check_directives. */
3442 unsigned int twiddled_syms:1;
3443
3444 /* Incremented every time we size stubs. */
3445 unsigned int stub_iteration;
3446
3447 /* Small local sym to section mapping cache. */
3448 struct sym_sec_cache sym_sec;
3449 };
3450
3451 /* Rename some of the generic section flags to better document how they
3452 are used here. */
3453 #define has_toc_reloc has_gp_reloc
3454 #define makes_toc_func_call need_finalize_relax
3455 #define call_check_in_progress reloc_done
3456
3457 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3458
3459 #define ppc_hash_table(p) \
3460 ((struct ppc_link_hash_table *) ((p)->hash))
3461
3462 #define ppc_stub_hash_lookup(table, string, create, copy) \
3463 ((struct ppc_stub_hash_entry *) \
3464 bfd_hash_lookup ((table), (string), (create), (copy)))
3465
3466 #define ppc_branch_hash_lookup(table, string, create, copy) \
3467 ((struct ppc_branch_hash_entry *) \
3468 bfd_hash_lookup ((table), (string), (create), (copy)))
3469
3470 /* Create an entry in the stub hash table. */
3471
3472 static struct bfd_hash_entry *
3473 stub_hash_newfunc (struct bfd_hash_entry *entry,
3474 struct bfd_hash_table *table,
3475 const char *string)
3476 {
3477 /* Allocate the structure if it has not already been allocated by a
3478 subclass. */
3479 if (entry == NULL)
3480 {
3481 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3482 if (entry == NULL)
3483 return entry;
3484 }
3485
3486 /* Call the allocation method of the superclass. */
3487 entry = bfd_hash_newfunc (entry, table, string);
3488 if (entry != NULL)
3489 {
3490 struct ppc_stub_hash_entry *eh;
3491
3492 /* Initialize the local fields. */
3493 eh = (struct ppc_stub_hash_entry *) entry;
3494 eh->stub_type = ppc_stub_none;
3495 eh->stub_sec = NULL;
3496 eh->stub_offset = 0;
3497 eh->target_value = 0;
3498 eh->target_section = NULL;
3499 eh->h = NULL;
3500 eh->id_sec = NULL;
3501 }
3502
3503 return entry;
3504 }
3505
3506 /* Create an entry in the branch hash table. */
3507
3508 static struct bfd_hash_entry *
3509 branch_hash_newfunc (struct bfd_hash_entry *entry,
3510 struct bfd_hash_table *table,
3511 const char *string)
3512 {
3513 /* Allocate the structure if it has not already been allocated by a
3514 subclass. */
3515 if (entry == NULL)
3516 {
3517 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3518 if (entry == NULL)
3519 return entry;
3520 }
3521
3522 /* Call the allocation method of the superclass. */
3523 entry = bfd_hash_newfunc (entry, table, string);
3524 if (entry != NULL)
3525 {
3526 struct ppc_branch_hash_entry *eh;
3527
3528 /* Initialize the local fields. */
3529 eh = (struct ppc_branch_hash_entry *) entry;
3530 eh->offset = 0;
3531 eh->iter = 0;
3532 }
3533
3534 return entry;
3535 }
3536
3537 /* Create an entry in a ppc64 ELF linker hash table. */
3538
3539 static struct bfd_hash_entry *
3540 link_hash_newfunc (struct bfd_hash_entry *entry,
3541 struct bfd_hash_table *table,
3542 const char *string)
3543 {
3544 /* Allocate the structure if it has not already been allocated by a
3545 subclass. */
3546 if (entry == NULL)
3547 {
3548 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3549 if (entry == NULL)
3550 return entry;
3551 }
3552
3553 /* Call the allocation method of the superclass. */
3554 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3555 if (entry != NULL)
3556 {
3557 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3558
3559 memset (&eh->u.stub_cache, 0,
3560 (sizeof (struct ppc_link_hash_entry)
3561 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3562
3563 /* When making function calls, old ABI code references function entry
3564 points (dot symbols), while new ABI code references the function
3565 descriptor symbol. We need to make any combination of reference and
3566 definition work together, without breaking archive linking.
3567
3568 For a defined function "foo" and an undefined call to "bar":
3569 An old object defines "foo" and ".foo", references ".bar" (possibly
3570 "bar" too).
3571 A new object defines "foo" and references "bar".
3572
3573 A new object thus has no problem with its undefined symbols being
3574 satisfied by definitions in an old object. On the other hand, the
3575 old object won't have ".bar" satisfied by a new object.
3576
3577 Keep a list of newly added dot-symbols. */
3578
3579 if (string[0] == '.')
3580 {
3581 struct ppc_link_hash_table *htab;
3582
3583 htab = (struct ppc_link_hash_table *) table;
3584 eh->u.next_dot_sym = htab->dot_syms;
3585 htab->dot_syms = eh;
3586 }
3587 }
3588
3589 return entry;
3590 }
3591
3592 /* Create a ppc64 ELF linker hash table. */
3593
3594 static struct bfd_link_hash_table *
3595 ppc64_elf_link_hash_table_create (bfd *abfd)
3596 {
3597 struct ppc_link_hash_table *htab;
3598 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3599
3600 htab = bfd_zmalloc (amt);
3601 if (htab == NULL)
3602 return NULL;
3603
3604 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3605 sizeof (struct ppc_link_hash_entry)))
3606 {
3607 free (htab);
3608 return NULL;
3609 }
3610
3611 /* Init the stub hash table too. */
3612 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3613 sizeof (struct ppc_stub_hash_entry)))
3614 return NULL;
3615
3616 /* And the branch hash table. */
3617 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3618 sizeof (struct ppc_branch_hash_entry)))
3619 return NULL;
3620
3621 /* Initializing two fields of the union is just cosmetic. We really
3622 only care about glist, but when compiled on a 32-bit host the
3623 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3624 debugger inspection of these fields look nicer. */
3625 htab->elf.init_got_refcount.refcount = 0;
3626 htab->elf.init_got_refcount.glist = NULL;
3627 htab->elf.init_plt_refcount.refcount = 0;
3628 htab->elf.init_plt_refcount.glist = NULL;
3629 htab->elf.init_got_offset.offset = 0;
3630 htab->elf.init_got_offset.glist = NULL;
3631 htab->elf.init_plt_offset.offset = 0;
3632 htab->elf.init_plt_offset.glist = NULL;
3633
3634 return &htab->elf.root;
3635 }
3636
3637 /* Free the derived linker hash table. */
3638
3639 static void
3640 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3641 {
3642 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3643
3644 bfd_hash_table_free (&ret->stub_hash_table);
3645 bfd_hash_table_free (&ret->branch_hash_table);
3646 _bfd_generic_link_hash_table_free (hash);
3647 }
3648
3649 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3650
3651 void
3652 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3653 {
3654 struct ppc_link_hash_table *htab;
3655
3656 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3657
3658 /* Always hook our dynamic sections into the first bfd, which is the
3659 linker created stub bfd. This ensures that the GOT header is at
3660 the start of the output TOC section. */
3661 htab = ppc_hash_table (info);
3662 htab->stub_bfd = abfd;
3663 htab->elf.dynobj = abfd;
3664 }
3665
3666 /* Build a name for an entry in the stub hash table. */
3667
3668 static char *
3669 ppc_stub_name (const asection *input_section,
3670 const asection *sym_sec,
3671 const struct ppc_link_hash_entry *h,
3672 const Elf_Internal_Rela *rel)
3673 {
3674 char *stub_name;
3675 bfd_size_type len;
3676
3677 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3678 offsets from a sym as a branch target? In fact, we could
3679 probably assume the addend is always zero. */
3680 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3681
3682 if (h)
3683 {
3684 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3685 stub_name = bfd_malloc (len);
3686 if (stub_name == NULL)
3687 return stub_name;
3688
3689 sprintf (stub_name, "%08x.%s+%x",
3690 input_section->id & 0xffffffff,
3691 h->elf.root.root.string,
3692 (int) rel->r_addend & 0xffffffff);
3693 }
3694 else
3695 {
3696 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3697 stub_name = bfd_malloc (len);
3698 if (stub_name == NULL)
3699 return stub_name;
3700
3701 sprintf (stub_name, "%08x.%x:%x+%x",
3702 input_section->id & 0xffffffff,
3703 sym_sec->id & 0xffffffff,
3704 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3705 (int) rel->r_addend & 0xffffffff);
3706 }
3707 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3708 stub_name[len - 2] = 0;
3709 return stub_name;
3710 }
3711
3712 /* Look up an entry in the stub hash. Stub entries are cached because
3713 creating the stub name takes a bit of time. */
3714
3715 static struct ppc_stub_hash_entry *
3716 ppc_get_stub_entry (const asection *input_section,
3717 const asection *sym_sec,
3718 struct ppc_link_hash_entry *h,
3719 const Elf_Internal_Rela *rel,
3720 struct ppc_link_hash_table *htab)
3721 {
3722 struct ppc_stub_hash_entry *stub_entry;
3723 const asection *id_sec;
3724
3725 /* If this input section is part of a group of sections sharing one
3726 stub section, then use the id of the first section in the group.
3727 Stub names need to include a section id, as there may well be
3728 more than one stub used to reach say, printf, and we need to
3729 distinguish between them. */
3730 id_sec = htab->stub_group[input_section->id].link_sec;
3731
3732 if (h != NULL && h->u.stub_cache != NULL
3733 && h->u.stub_cache->h == h
3734 && h->u.stub_cache->id_sec == id_sec)
3735 {
3736 stub_entry = h->u.stub_cache;
3737 }
3738 else
3739 {
3740 char *stub_name;
3741
3742 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3743 if (stub_name == NULL)
3744 return NULL;
3745
3746 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3747 stub_name, FALSE, FALSE);
3748 if (h != NULL)
3749 h->u.stub_cache = stub_entry;
3750
3751 free (stub_name);
3752 }
3753
3754 return stub_entry;
3755 }
3756
3757 /* Add a new stub entry to the stub hash. Not all fields of the new
3758 stub entry are initialised. */
3759
3760 static struct ppc_stub_hash_entry *
3761 ppc_add_stub (const char *stub_name,
3762 asection *section,
3763 struct ppc_link_hash_table *htab)
3764 {
3765 asection *link_sec;
3766 asection *stub_sec;
3767 struct ppc_stub_hash_entry *stub_entry;
3768
3769 link_sec = htab->stub_group[section->id].link_sec;
3770 stub_sec = htab->stub_group[section->id].stub_sec;
3771 if (stub_sec == NULL)
3772 {
3773 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3774 if (stub_sec == NULL)
3775 {
3776 size_t namelen;
3777 bfd_size_type len;
3778 char *s_name;
3779
3780 namelen = strlen (link_sec->name);
3781 len = namelen + sizeof (STUB_SUFFIX);
3782 s_name = bfd_alloc (htab->stub_bfd, len);
3783 if (s_name == NULL)
3784 return NULL;
3785
3786 memcpy (s_name, link_sec->name, namelen);
3787 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3788 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3789 if (stub_sec == NULL)
3790 return NULL;
3791 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3792 }
3793 htab->stub_group[section->id].stub_sec = stub_sec;
3794 }
3795
3796 /* Enter this entry into the linker stub hash table. */
3797 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3798 TRUE, FALSE);
3799 if (stub_entry == NULL)
3800 {
3801 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3802 section->owner, stub_name);
3803 return NULL;
3804 }
3805
3806 stub_entry->stub_sec = stub_sec;
3807 stub_entry->stub_offset = 0;
3808 stub_entry->id_sec = link_sec;
3809 return stub_entry;
3810 }
3811
3812 /* Create sections for linker generated code. */
3813
3814 static bfd_boolean
3815 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3816 {
3817 struct ppc_link_hash_table *htab;
3818 flagword flags;
3819
3820 htab = ppc_hash_table (info);
3821
3822 /* Create .sfpr for code to save and restore fp regs. */
3823 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3824 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3825 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3826 flags);
3827 if (htab->sfpr == NULL
3828 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3829 return FALSE;
3830
3831 /* Create .glink for lazy dynamic linking support. */
3832 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3833 flags);
3834 if (htab->glink == NULL
3835 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3836 return FALSE;
3837
3838 /* Create branch lookup table for plt_branch stubs. */
3839 flags = (SEC_ALLOC | SEC_LOAD
3840 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3841 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3842 flags);
3843 if (htab->brlt == NULL
3844 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3845 return FALSE;
3846
3847 if (!info->shared)
3848 return TRUE;
3849
3850 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3851 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3852 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3853 ".rela.branch_lt",
3854 flags);
3855 if (!htab->relbrlt
3856 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3857 return FALSE;
3858
3859 return TRUE;
3860 }
3861
3862 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3863 not already done. */
3864
3865 static bfd_boolean
3866 create_got_section (bfd *abfd, struct bfd_link_info *info)
3867 {
3868 asection *got, *relgot;
3869 flagword flags;
3870 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3871
3872 if (!htab->got)
3873 {
3874 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3875 return FALSE;
3876
3877 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3878 if (!htab->got)
3879 abort ();
3880 }
3881
3882 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3883 | SEC_LINKER_CREATED);
3884
3885 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3886 if (!got
3887 || !bfd_set_section_alignment (abfd, got, 3))
3888 return FALSE;
3889
3890 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3891 flags | SEC_READONLY);
3892 if (!relgot
3893 || ! bfd_set_section_alignment (abfd, relgot, 3))
3894 return FALSE;
3895
3896 ppc64_elf_tdata (abfd)->got = got;
3897 ppc64_elf_tdata (abfd)->relgot = relgot;
3898 return TRUE;
3899 }
3900
3901 /* Create the dynamic sections, and set up shortcuts. */
3902
3903 static bfd_boolean
3904 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3905 {
3906 struct ppc_link_hash_table *htab;
3907
3908 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3909 return FALSE;
3910
3911 htab = ppc_hash_table (info);
3912 if (!htab->got)
3913 htab->got = bfd_get_section_by_name (dynobj, ".got");
3914 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3915 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3916 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3917 if (!info->shared)
3918 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3919
3920 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3921 || (!info->shared && !htab->relbss))
3922 abort ();
3923
3924 return TRUE;
3925 }
3926
3927 /* Merge PLT info on FROM with that on TO. */
3928
3929 static void
3930 move_plt_plist (struct ppc_link_hash_entry *from,
3931 struct ppc_link_hash_entry *to)
3932 {
3933 if (from->elf.plt.plist != NULL)
3934 {
3935 if (to->elf.plt.plist != NULL)
3936 {
3937 struct plt_entry **entp;
3938 struct plt_entry *ent;
3939
3940 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3941 {
3942 struct plt_entry *dent;
3943
3944 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3945 if (dent->addend == ent->addend)
3946 {
3947 dent->plt.refcount += ent->plt.refcount;
3948 *entp = ent->next;
3949 break;
3950 }
3951 if (dent == NULL)
3952 entp = &ent->next;
3953 }
3954 *entp = to->elf.plt.plist;
3955 }
3956
3957 to->elf.plt.plist = from->elf.plt.plist;
3958 from->elf.plt.plist = NULL;
3959 }
3960 }
3961
3962 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3963
3964 static void
3965 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3966 struct elf_link_hash_entry *dir,
3967 struct elf_link_hash_entry *ind)
3968 {
3969 struct ppc_link_hash_entry *edir, *eind;
3970
3971 edir = (struct ppc_link_hash_entry *) dir;
3972 eind = (struct ppc_link_hash_entry *) ind;
3973
3974 /* Copy over any dynamic relocs we may have on the indirect sym. */
3975 if (eind->dyn_relocs != NULL)
3976 {
3977 if (edir->dyn_relocs != NULL)
3978 {
3979 struct ppc_dyn_relocs **pp;
3980 struct ppc_dyn_relocs *p;
3981
3982 /* Add reloc counts against the indirect sym to the direct sym
3983 list. Merge any entries against the same section. */
3984 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3985 {
3986 struct ppc_dyn_relocs *q;
3987
3988 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3989 if (q->sec == p->sec)
3990 {
3991 q->pc_count += p->pc_count;
3992 q->count += p->count;
3993 *pp = p->next;
3994 break;
3995 }
3996 if (q == NULL)
3997 pp = &p->next;
3998 }
3999 *pp = edir->dyn_relocs;
4000 }
4001
4002 edir->dyn_relocs = eind->dyn_relocs;
4003 eind->dyn_relocs = NULL;
4004 }
4005
4006 edir->is_func |= eind->is_func;
4007 edir->is_func_descriptor |= eind->is_func_descriptor;
4008 edir->tls_mask |= eind->tls_mask;
4009
4010 /* If called to transfer flags for a weakdef during processing
4011 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4012 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4013 if (!(ELIMINATE_COPY_RELOCS
4014 && eind->elf.root.type != bfd_link_hash_indirect
4015 && edir->elf.dynamic_adjusted))
4016 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4017
4018 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4019 edir->elf.ref_regular |= eind->elf.ref_regular;
4020 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4021 edir->elf.needs_plt |= eind->elf.needs_plt;
4022
4023 /* If we were called to copy over info for a weak sym, that's all. */
4024 if (eind->elf.root.type != bfd_link_hash_indirect)
4025 return;
4026
4027 /* Copy over got entries that we may have already seen to the
4028 symbol which just became indirect. */
4029 if (eind->elf.got.glist != NULL)
4030 {
4031 if (edir->elf.got.glist != NULL)
4032 {
4033 struct got_entry **entp;
4034 struct got_entry *ent;
4035
4036 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4037 {
4038 struct got_entry *dent;
4039
4040 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4041 if (dent->addend == ent->addend
4042 && dent->owner == ent->owner
4043 && dent->tls_type == ent->tls_type)
4044 {
4045 dent->got.refcount += ent->got.refcount;
4046 *entp = ent->next;
4047 break;
4048 }
4049 if (dent == NULL)
4050 entp = &ent->next;
4051 }
4052 *entp = edir->elf.got.glist;
4053 }
4054
4055 edir->elf.got.glist = eind->elf.got.glist;
4056 eind->elf.got.glist = NULL;
4057 }
4058
4059 /* And plt entries. */
4060 move_plt_plist (eind, edir);
4061
4062 if (eind->elf.dynindx != -1)
4063 {
4064 if (edir->elf.dynindx != -1)
4065 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4066 edir->elf.dynstr_index);
4067 edir->elf.dynindx = eind->elf.dynindx;
4068 edir->elf.dynstr_index = eind->elf.dynstr_index;
4069 eind->elf.dynindx = -1;
4070 eind->elf.dynstr_index = 0;
4071 }
4072 }
4073
4074 /* Find the function descriptor hash entry from the given function code
4075 hash entry FH. Link the entries via their OH fields. */
4076
4077 static struct ppc_link_hash_entry *
4078 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4079 {
4080 struct ppc_link_hash_entry *fdh = fh->oh;
4081
4082 if (fdh == NULL)
4083 {
4084 const char *fd_name = fh->elf.root.root.string + 1;
4085
4086 fdh = (struct ppc_link_hash_entry *)
4087 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4088 if (fdh != NULL)
4089 {
4090 fdh->is_func_descriptor = 1;
4091 fdh->oh = fh;
4092 fh->is_func = 1;
4093 fh->oh = fdh;
4094 }
4095 }
4096
4097 return fdh;
4098 }
4099
4100 /* Make a fake function descriptor sym for the code sym FH. */
4101
4102 static struct ppc_link_hash_entry *
4103 make_fdh (struct bfd_link_info *info,
4104 struct ppc_link_hash_entry *fh)
4105 {
4106 bfd *abfd;
4107 asymbol *newsym;
4108 struct bfd_link_hash_entry *bh;
4109 struct ppc_link_hash_entry *fdh;
4110
4111 abfd = fh->elf.root.u.undef.abfd;
4112 newsym = bfd_make_empty_symbol (abfd);
4113 newsym->name = fh->elf.root.root.string + 1;
4114 newsym->section = bfd_und_section_ptr;
4115 newsym->value = 0;
4116 newsym->flags = BSF_WEAK;
4117
4118 bh = NULL;
4119 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4120 newsym->flags, newsym->section,
4121 newsym->value, NULL, FALSE, FALSE,
4122 &bh))
4123 return NULL;
4124
4125 fdh = (struct ppc_link_hash_entry *) bh;
4126 fdh->elf.non_elf = 0;
4127 fdh->fake = 1;
4128 fdh->is_func_descriptor = 1;
4129 fdh->oh = fh;
4130 fh->is_func = 1;
4131 fh->oh = fdh;
4132 return fdh;
4133 }
4134
4135 /* Fix function descriptor symbols defined in .opd sections to be
4136 function type. */
4137
4138 static bfd_boolean
4139 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4140 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4141 Elf_Internal_Sym *isym,
4142 const char **name ATTRIBUTE_UNUSED,
4143 flagword *flags ATTRIBUTE_UNUSED,
4144 asection **sec,
4145 bfd_vma *value ATTRIBUTE_UNUSED)
4146 {
4147 if (*sec != NULL
4148 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4149 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4150
4151 return TRUE;
4152 }
4153
4154 /* This function makes an old ABI object reference to ".bar" cause the
4155 inclusion of a new ABI object archive that defines "bar".
4156 NAME is a symbol defined in an archive. Return a symbol in the hash
4157 table that might be satisfied by the archive symbols. */
4158
4159 static struct elf_link_hash_entry *
4160 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4161 struct bfd_link_info *info,
4162 const char *name)
4163 {
4164 struct elf_link_hash_entry *h;
4165 char *dot_name;
4166 size_t len;
4167
4168 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4169 if (h != NULL
4170 /* Don't return this sym if it is a fake function descriptor
4171 created by add_symbol_adjust. */
4172 && !(h->root.type == bfd_link_hash_undefweak
4173 && ((struct ppc_link_hash_entry *) h)->fake))
4174 return h;
4175
4176 if (name[0] == '.')
4177 return h;
4178
4179 len = strlen (name);
4180 dot_name = bfd_alloc (abfd, len + 2);
4181 if (dot_name == NULL)
4182 return (struct elf_link_hash_entry *) 0 - 1;
4183 dot_name[0] = '.';
4184 memcpy (dot_name + 1, name, len + 1);
4185 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4186 bfd_release (abfd, dot_name);
4187 return h;
4188 }
4189
4190 /* This function satisfies all old ABI object references to ".bar" if a
4191 new ABI object defines "bar". Well, at least, undefined dot symbols
4192 are made weak. This stops later archive searches from including an
4193 object if we already have a function descriptor definition. It also
4194 prevents the linker complaining about undefined symbols.
4195 We also check and correct mismatched symbol visibility here. The
4196 most restrictive visibility of the function descriptor and the
4197 function entry symbol is used. */
4198
4199 static bfd_boolean
4200 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4201 {
4202 struct ppc_link_hash_table *htab;
4203 struct ppc_link_hash_entry *fdh;
4204
4205 if (eh->elf.root.type == bfd_link_hash_indirect)
4206 return TRUE;
4207
4208 if (eh->elf.root.type == bfd_link_hash_warning)
4209 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4210
4211 if (eh->elf.root.root.string[0] != '.')
4212 abort ();
4213
4214 htab = ppc_hash_table (info);
4215 fdh = get_fdh (eh, htab);
4216 if (fdh == NULL
4217 && !info->relocatable
4218 && (eh->elf.root.type == bfd_link_hash_undefined
4219 || eh->elf.root.type == bfd_link_hash_undefweak)
4220 && eh->elf.ref_regular)
4221 {
4222 /* Make an undefweak function descriptor sym, which is enough to
4223 pull in an --as-needed shared lib, but won't cause link
4224 errors. Archives are handled elsewhere. */
4225 fdh = make_fdh (info, eh);
4226 if (fdh == NULL)
4227 return FALSE;
4228 else
4229 fdh->elf.ref_regular = 1;
4230 }
4231 else if (fdh != NULL)
4232 {
4233 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4234 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4235 if (entry_vis < descr_vis)
4236 fdh->elf.other += entry_vis - descr_vis;
4237 else if (entry_vis > descr_vis)
4238 eh->elf.other += descr_vis - entry_vis;
4239
4240 if ((fdh->elf.root.type == bfd_link_hash_defined
4241 || fdh->elf.root.type == bfd_link_hash_defweak)
4242 && eh->elf.root.type == bfd_link_hash_undefined)
4243 {
4244 eh->elf.root.type = bfd_link_hash_undefweak;
4245 eh->was_undefined = 1;
4246 htab->twiddled_syms = 1;
4247 }
4248 }
4249
4250 return TRUE;
4251 }
4252
4253 /* Process list of dot-symbols we made in link_hash_newfunc. */
4254
4255 static bfd_boolean
4256 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4257 {
4258 struct ppc_link_hash_table *htab;
4259 struct ppc_link_hash_entry **p, *eh;
4260
4261 htab = ppc_hash_table (info);
4262 if (!is_ppc64_elf_target (htab->elf.root.creator))
4263 return TRUE;
4264
4265 if (is_ppc64_elf_target (ibfd->xvec))
4266 {
4267 p = &htab->dot_syms;
4268 while ((eh = *p) != NULL)
4269 {
4270 *p = NULL;
4271 if (!add_symbol_adjust (eh, info))
4272 return FALSE;
4273 p = &eh->u.next_dot_sym;
4274 }
4275 }
4276
4277 /* Clear the list for non-ppc64 input files. */
4278 p = &htab->dot_syms;
4279 while ((eh = *p) != NULL)
4280 {
4281 *p = NULL;
4282 p = &eh->u.next_dot_sym;
4283 }
4284
4285 /* We need to fix the undefs list for any syms we have twiddled to
4286 undef_weak. */
4287 if (htab->twiddled_syms)
4288 {
4289 bfd_link_repair_undef_list (&htab->elf.root);
4290 htab->twiddled_syms = 0;
4291 }
4292 return TRUE;
4293 }
4294
4295 /* Undo hash table changes when an --as-needed input file is determined
4296 not to be needed. */
4297
4298 static bfd_boolean
4299 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4300 struct bfd_link_info *info)
4301 {
4302 ppc_hash_table (info)->dot_syms = NULL;
4303 return TRUE;
4304 }
4305
4306 static bfd_boolean
4307 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4308 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4309 {
4310 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4311 char *local_got_tls_masks;
4312
4313 if (local_got_ents == NULL)
4314 {
4315 bfd_size_type size = symtab_hdr->sh_info;
4316
4317 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4318 local_got_ents = bfd_zalloc (abfd, size);
4319 if (local_got_ents == NULL)
4320 return FALSE;
4321 elf_local_got_ents (abfd) = local_got_ents;
4322 }
4323
4324 if ((tls_type & TLS_EXPLICIT) == 0)
4325 {
4326 struct got_entry *ent;
4327
4328 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4329 if (ent->addend == r_addend
4330 && ent->owner == abfd
4331 && ent->tls_type == tls_type)
4332 break;
4333 if (ent == NULL)
4334 {
4335 bfd_size_type amt = sizeof (*ent);
4336 ent = bfd_alloc (abfd, amt);
4337 if (ent == NULL)
4338 return FALSE;
4339 ent->next = local_got_ents[r_symndx];
4340 ent->addend = r_addend;
4341 ent->owner = abfd;
4342 ent->tls_type = tls_type;
4343 ent->got.refcount = 0;
4344 local_got_ents[r_symndx] = ent;
4345 }
4346 ent->got.refcount += 1;
4347 }
4348
4349 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4350 local_got_tls_masks[r_symndx] |= tls_type;
4351 return TRUE;
4352 }
4353
4354 static bfd_boolean
4355 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4356 {
4357 struct plt_entry *ent;
4358
4359 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4360 if (ent->addend == addend)
4361 break;
4362 if (ent == NULL)
4363 {
4364 bfd_size_type amt = sizeof (*ent);
4365 ent = bfd_alloc (abfd, amt);
4366 if (ent == NULL)
4367 return FALSE;
4368 ent->next = eh->elf.plt.plist;
4369 ent->addend = addend;
4370 ent->plt.refcount = 0;
4371 eh->elf.plt.plist = ent;
4372 }
4373 ent->plt.refcount += 1;
4374 eh->elf.needs_plt = 1;
4375 if (eh->elf.root.root.string[0] == '.'
4376 && eh->elf.root.root.string[1] != '\0')
4377 eh->is_func = 1;
4378 return TRUE;
4379 }
4380
4381 /* Look through the relocs for a section during the first phase, and
4382 calculate needed space in the global offset table, procedure
4383 linkage table, and dynamic reloc sections. */
4384
4385 static bfd_boolean
4386 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4387 asection *sec, const Elf_Internal_Rela *relocs)
4388 {
4389 struct ppc_link_hash_table *htab;
4390 Elf_Internal_Shdr *symtab_hdr;
4391 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4392 const Elf_Internal_Rela *rel;
4393 const Elf_Internal_Rela *rel_end;
4394 asection *sreloc;
4395 asection **opd_sym_map;
4396
4397 if (info->relocatable)
4398 return TRUE;
4399
4400 /* Don't do anything special with non-loaded, non-alloced sections.
4401 In particular, any relocs in such sections should not affect GOT
4402 and PLT reference counting (ie. we don't allow them to create GOT
4403 or PLT entries), there's no possibility or desire to optimize TLS
4404 relocs, and there's not much point in propagating relocs to shared
4405 libs that the dynamic linker won't relocate. */
4406 if ((sec->flags & SEC_ALLOC) == 0)
4407 return TRUE;
4408
4409 htab = ppc_hash_table (info);
4410 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4411
4412 sym_hashes = elf_sym_hashes (abfd);
4413 sym_hashes_end = (sym_hashes
4414 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4415 - symtab_hdr->sh_info);
4416
4417 sreloc = NULL;
4418 opd_sym_map = NULL;
4419 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4420 {
4421 /* Garbage collection needs some extra help with .opd sections.
4422 We don't want to necessarily keep everything referenced by
4423 relocs in .opd, as that would keep all functions. Instead,
4424 if we reference an .opd symbol (a function descriptor), we
4425 want to keep the function code symbol's section. This is
4426 easy for global symbols, but for local syms we need to keep
4427 information about the associated function section. Later, if
4428 edit_opd deletes entries, we'll use this array to adjust
4429 local syms in .opd. */
4430 union opd_info {
4431 asection *func_section;
4432 long entry_adjust;
4433 };
4434 bfd_size_type amt;
4435
4436 amt = sec->size * sizeof (union opd_info) / 8;
4437 opd_sym_map = bfd_zalloc (abfd, amt);
4438 if (opd_sym_map == NULL)
4439 return FALSE;
4440 ppc64_elf_section_data (sec)->u.opd_func_sec = opd_sym_map;
4441 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4442 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4443 }
4444
4445 if (htab->sfpr == NULL
4446 && !create_linkage_sections (htab->elf.dynobj, info))
4447 return FALSE;
4448
4449 rel_end = relocs + sec->reloc_count;
4450 for (rel = relocs; rel < rel_end; rel++)
4451 {
4452 unsigned long r_symndx;
4453 struct elf_link_hash_entry *h;
4454 enum elf_ppc64_reloc_type r_type;
4455 int tls_type = 0;
4456 struct _ppc64_elf_section_data *ppc64_sec;
4457
4458 r_symndx = ELF64_R_SYM (rel->r_info);
4459 if (r_symndx < symtab_hdr->sh_info)
4460 h = NULL;
4461 else
4462 {
4463 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4464 while (h->root.type == bfd_link_hash_indirect
4465 || h->root.type == bfd_link_hash_warning)
4466 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4467 }
4468
4469 r_type = ELF64_R_TYPE (rel->r_info);
4470 switch (r_type)
4471 {
4472 case R_PPC64_GOT_TLSLD16:
4473 case R_PPC64_GOT_TLSLD16_LO:
4474 case R_PPC64_GOT_TLSLD16_HI:
4475 case R_PPC64_GOT_TLSLD16_HA:
4476 ppc64_tlsld_got (abfd)->refcount += 1;
4477 tls_type = TLS_TLS | TLS_LD;
4478 goto dogottls;
4479
4480 case R_PPC64_GOT_TLSGD16:
4481 case R_PPC64_GOT_TLSGD16_LO:
4482 case R_PPC64_GOT_TLSGD16_HI:
4483 case R_PPC64_GOT_TLSGD16_HA:
4484 tls_type = TLS_TLS | TLS_GD;
4485 goto dogottls;
4486
4487 case R_PPC64_GOT_TPREL16_DS:
4488 case R_PPC64_GOT_TPREL16_LO_DS:
4489 case R_PPC64_GOT_TPREL16_HI:
4490 case R_PPC64_GOT_TPREL16_HA:
4491 if (info->shared)
4492 info->flags |= DF_STATIC_TLS;
4493 tls_type = TLS_TLS | TLS_TPREL;
4494 goto dogottls;
4495
4496 case R_PPC64_GOT_DTPREL16_DS:
4497 case R_PPC64_GOT_DTPREL16_LO_DS:
4498 case R_PPC64_GOT_DTPREL16_HI:
4499 case R_PPC64_GOT_DTPREL16_HA:
4500 tls_type = TLS_TLS | TLS_DTPREL;
4501 dogottls:
4502 sec->has_tls_reloc = 1;
4503 /* Fall thru */
4504
4505 case R_PPC64_GOT16:
4506 case R_PPC64_GOT16_DS:
4507 case R_PPC64_GOT16_HA:
4508 case R_PPC64_GOT16_HI:
4509 case R_PPC64_GOT16_LO:
4510 case R_PPC64_GOT16_LO_DS:
4511 /* This symbol requires a global offset table entry. */
4512 sec->has_toc_reloc = 1;
4513 if (ppc64_elf_tdata (abfd)->got == NULL
4514 && !create_got_section (abfd, info))
4515 return FALSE;
4516
4517 if (h != NULL)
4518 {
4519 struct ppc_link_hash_entry *eh;
4520 struct got_entry *ent;
4521
4522 eh = (struct ppc_link_hash_entry *) h;
4523 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4524 if (ent->addend == rel->r_addend
4525 && ent->owner == abfd
4526 && ent->tls_type == tls_type)
4527 break;
4528 if (ent == NULL)
4529 {
4530 bfd_size_type amt = sizeof (*ent);
4531 ent = bfd_alloc (abfd, amt);
4532 if (ent == NULL)
4533 return FALSE;
4534 ent->next = eh->elf.got.glist;
4535 ent->addend = rel->r_addend;
4536 ent->owner = abfd;
4537 ent->tls_type = tls_type;
4538 ent->got.refcount = 0;
4539 eh->elf.got.glist = ent;
4540 }
4541 ent->got.refcount += 1;
4542 eh->tls_mask |= tls_type;
4543 }
4544 else
4545 /* This is a global offset table entry for a local symbol. */
4546 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4547 rel->r_addend, tls_type))
4548 return FALSE;
4549 break;
4550
4551 case R_PPC64_PLT16_HA:
4552 case R_PPC64_PLT16_HI:
4553 case R_PPC64_PLT16_LO:
4554 case R_PPC64_PLT32:
4555 case R_PPC64_PLT64:
4556 /* This symbol requires a procedure linkage table entry. We
4557 actually build the entry in adjust_dynamic_symbol,
4558 because this might be a case of linking PIC code without
4559 linking in any dynamic objects, in which case we don't
4560 need to generate a procedure linkage table after all. */
4561 if (h == NULL)
4562 {
4563 /* It does not make sense to have a procedure linkage
4564 table entry for a local symbol. */
4565 bfd_set_error (bfd_error_bad_value);
4566 return FALSE;
4567 }
4568 else
4569 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4570 rel->r_addend))
4571 return FALSE;
4572 break;
4573
4574 /* The following relocations don't need to propagate the
4575 relocation if linking a shared object since they are
4576 section relative. */
4577 case R_PPC64_SECTOFF:
4578 case R_PPC64_SECTOFF_LO:
4579 case R_PPC64_SECTOFF_HI:
4580 case R_PPC64_SECTOFF_HA:
4581 case R_PPC64_SECTOFF_DS:
4582 case R_PPC64_SECTOFF_LO_DS:
4583 case R_PPC64_DTPREL16:
4584 case R_PPC64_DTPREL16_LO:
4585 case R_PPC64_DTPREL16_HI:
4586 case R_PPC64_DTPREL16_HA:
4587 case R_PPC64_DTPREL16_DS:
4588 case R_PPC64_DTPREL16_LO_DS:
4589 case R_PPC64_DTPREL16_HIGHER:
4590 case R_PPC64_DTPREL16_HIGHERA:
4591 case R_PPC64_DTPREL16_HIGHEST:
4592 case R_PPC64_DTPREL16_HIGHESTA:
4593 break;
4594
4595 /* Nor do these. */
4596 case R_PPC64_TOC16:
4597 case R_PPC64_TOC16_LO:
4598 case R_PPC64_TOC16_HI:
4599 case R_PPC64_TOC16_HA:
4600 case R_PPC64_TOC16_DS:
4601 case R_PPC64_TOC16_LO_DS:
4602 sec->has_toc_reloc = 1;
4603 break;
4604
4605 /* This relocation describes the C++ object vtable hierarchy.
4606 Reconstruct it for later use during GC. */
4607 case R_PPC64_GNU_VTINHERIT:
4608 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4609 return FALSE;
4610 break;
4611
4612 /* This relocation describes which C++ vtable entries are actually
4613 used. Record for later use during GC. */
4614 case R_PPC64_GNU_VTENTRY:
4615 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4616 return FALSE;
4617 break;
4618
4619 case R_PPC64_REL14:
4620 case R_PPC64_REL14_BRTAKEN:
4621 case R_PPC64_REL14_BRNTAKEN:
4622 {
4623 asection *dest = NULL;
4624
4625 /* Heuristic: If jumping outside our section, chances are
4626 we are going to need a stub. */
4627 if (h != NULL)
4628 {
4629 /* If the sym is weak it may be overridden later, so
4630 don't assume we know where a weak sym lives. */
4631 if (h->root.type == bfd_link_hash_defined)
4632 dest = h->root.u.def.section;
4633 }
4634 else
4635 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4636 sec, r_symndx);
4637 if (dest != sec)
4638 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4639 }
4640 /* Fall through. */
4641
4642 case R_PPC64_REL24:
4643 if (h != NULL)
4644 {
4645 /* We may need a .plt entry if the function this reloc
4646 refers to is in a shared lib. */
4647 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4648 rel->r_addend))
4649 return FALSE;
4650 if (h == &htab->tls_get_addr->elf
4651 || h == &htab->tls_get_addr_fd->elf)
4652 sec->has_tls_reloc = 1;
4653 else if (htab->tls_get_addr == NULL
4654 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4655 && (h->root.root.string[15] == 0
4656 || h->root.root.string[15] == '@'))
4657 {
4658 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4659 sec->has_tls_reloc = 1;
4660 }
4661 else if (htab->tls_get_addr_fd == NULL
4662 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4663 && (h->root.root.string[14] == 0
4664 || h->root.root.string[14] == '@'))
4665 {
4666 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4667 sec->has_tls_reloc = 1;
4668 }
4669 }
4670 break;
4671
4672 case R_PPC64_TPREL64:
4673 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4674 if (info->shared)
4675 info->flags |= DF_STATIC_TLS;
4676 goto dotlstoc;
4677
4678 case R_PPC64_DTPMOD64:
4679 if (rel + 1 < rel_end
4680 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4681 && rel[1].r_offset == rel->r_offset + 8)
4682 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4683 else
4684 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4685 goto dotlstoc;
4686
4687 case R_PPC64_DTPREL64:
4688 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4689 if (rel != relocs
4690 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4691 && rel[-1].r_offset == rel->r_offset - 8)
4692 /* This is the second reloc of a dtpmod, dtprel pair.
4693 Don't mark with TLS_DTPREL. */
4694 goto dodyn;
4695
4696 dotlstoc:
4697 sec->has_tls_reloc = 1;
4698 if (h != NULL)
4699 {
4700 struct ppc_link_hash_entry *eh;
4701 eh = (struct ppc_link_hash_entry *) h;
4702 eh->tls_mask |= tls_type;
4703 }
4704 else
4705 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4706 rel->r_addend, tls_type))
4707 return FALSE;
4708
4709 ppc64_sec = ppc64_elf_section_data (sec);
4710 if (ppc64_sec->sec_type != sec_toc)
4711 {
4712 /* One extra to simplify get_tls_mask. */
4713 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4714 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4715 if (ppc64_sec->u.t_symndx == NULL)
4716 return FALSE;
4717 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4718 ppc64_sec->sec_type = sec_toc;
4719 }
4720 BFD_ASSERT (rel->r_offset % 8 == 0);
4721 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4722
4723 /* Mark the second slot of a GD or LD entry.
4724 -1 to indicate GD and -2 to indicate LD. */
4725 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4726 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4727 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4728 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4729 goto dodyn;
4730
4731 case R_PPC64_TPREL16:
4732 case R_PPC64_TPREL16_LO:
4733 case R_PPC64_TPREL16_HI:
4734 case R_PPC64_TPREL16_HA:
4735 case R_PPC64_TPREL16_DS:
4736 case R_PPC64_TPREL16_LO_DS:
4737 case R_PPC64_TPREL16_HIGHER:
4738 case R_PPC64_TPREL16_HIGHERA:
4739 case R_PPC64_TPREL16_HIGHEST:
4740 case R_PPC64_TPREL16_HIGHESTA:
4741 if (info->shared)
4742 {
4743 info->flags |= DF_STATIC_TLS;
4744 goto dodyn;
4745 }
4746 break;
4747
4748 case R_PPC64_ADDR64:
4749 if (opd_sym_map != NULL
4750 && rel + 1 < rel_end
4751 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4752 {
4753 if (h != NULL)
4754 {
4755 if (h->root.root.string[0] == '.'
4756 && h->root.root.string[1] != 0
4757 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4758 ;
4759 else
4760 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4761 }
4762 else
4763 {
4764 asection *s;
4765
4766 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4767 r_symndx);
4768 if (s == NULL)
4769 return FALSE;
4770 else if (s != sec)
4771 opd_sym_map[rel->r_offset / 8] = s;
4772 }
4773 }
4774 /* Fall through. */
4775
4776 case R_PPC64_REL30:
4777 case R_PPC64_REL32:
4778 case R_PPC64_REL64:
4779 case R_PPC64_ADDR14:
4780 case R_PPC64_ADDR14_BRNTAKEN:
4781 case R_PPC64_ADDR14_BRTAKEN:
4782 case R_PPC64_ADDR16:
4783 case R_PPC64_ADDR16_DS:
4784 case R_PPC64_ADDR16_HA:
4785 case R_PPC64_ADDR16_HI:
4786 case R_PPC64_ADDR16_HIGHER:
4787 case R_PPC64_ADDR16_HIGHERA:
4788 case R_PPC64_ADDR16_HIGHEST:
4789 case R_PPC64_ADDR16_HIGHESTA:
4790 case R_PPC64_ADDR16_LO:
4791 case R_PPC64_ADDR16_LO_DS:
4792 case R_PPC64_ADDR24:
4793 case R_PPC64_ADDR32:
4794 case R_PPC64_UADDR16:
4795 case R_PPC64_UADDR32:
4796 case R_PPC64_UADDR64:
4797 case R_PPC64_TOC:
4798 if (h != NULL && !info->shared)
4799 /* We may need a copy reloc. */
4800 h->non_got_ref = 1;
4801
4802 /* Don't propagate .opd relocs. */
4803 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4804 break;
4805
4806 /* If we are creating a shared library, and this is a reloc
4807 against a global symbol, or a non PC relative reloc
4808 against a local symbol, then we need to copy the reloc
4809 into the shared library. However, if we are linking with
4810 -Bsymbolic, we do not need to copy a reloc against a
4811 global symbol which is defined in an object we are
4812 including in the link (i.e., DEF_REGULAR is set). At
4813 this point we have not seen all the input files, so it is
4814 possible that DEF_REGULAR is not set now but will be set
4815 later (it is never cleared). In case of a weak definition,
4816 DEF_REGULAR may be cleared later by a strong definition in
4817 a shared library. We account for that possibility below by
4818 storing information in the dyn_relocs field of the hash
4819 table entry. A similar situation occurs when creating
4820 shared libraries and symbol visibility changes render the
4821 symbol local.
4822
4823 If on the other hand, we are creating an executable, we
4824 may need to keep relocations for symbols satisfied by a
4825 dynamic library if we manage to avoid copy relocs for the
4826 symbol. */
4827 dodyn:
4828 if ((info->shared
4829 && (MUST_BE_DYN_RELOC (r_type)
4830 || (h != NULL
4831 && (! info->symbolic
4832 || h->root.type == bfd_link_hash_defweak
4833 || !h->def_regular))))
4834 || (ELIMINATE_COPY_RELOCS
4835 && !info->shared
4836 && h != NULL
4837 && (h->root.type == bfd_link_hash_defweak
4838 || !h->def_regular)))
4839 {
4840 struct ppc_dyn_relocs *p;
4841 struct ppc_dyn_relocs **head;
4842
4843 /* We must copy these reloc types into the output file.
4844 Create a reloc section in dynobj and make room for
4845 this reloc. */
4846 if (sreloc == NULL)
4847 {
4848 const char *name;
4849 bfd *dynobj;
4850
4851 name = (bfd_elf_string_from_elf_section
4852 (abfd,
4853 elf_elfheader (abfd)->e_shstrndx,
4854 elf_section_data (sec)->rel_hdr.sh_name));
4855 if (name == NULL)
4856 return FALSE;
4857
4858 if (! CONST_STRNEQ (name, ".rela")
4859 || strcmp (bfd_get_section_name (abfd, sec),
4860 name + 5) != 0)
4861 {
4862 (*_bfd_error_handler)
4863 (_("%B: bad relocation section name `%s\'"),
4864 abfd, name);
4865 bfd_set_error (bfd_error_bad_value);
4866 }
4867
4868 dynobj = htab->elf.dynobj;
4869 sreloc = bfd_get_section_by_name (dynobj, name);
4870 if (sreloc == NULL)
4871 {
4872 flagword flags;
4873
4874 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4875 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4876 | SEC_ALLOC | SEC_LOAD);
4877 sreloc = bfd_make_section_with_flags (dynobj,
4878 name,
4879 flags);
4880 if (sreloc == NULL
4881 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4882 return FALSE;
4883 }
4884 elf_section_data (sec)->sreloc = sreloc;
4885 }
4886
4887 /* If this is a global symbol, we count the number of
4888 relocations we need for this symbol. */
4889 if (h != NULL)
4890 {
4891 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4892 }
4893 else
4894 {
4895 /* Track dynamic relocs needed for local syms too.
4896 We really need local syms available to do this
4897 easily. Oh well. */
4898
4899 asection *s;
4900 void *vpp;
4901
4902 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4903 sec, r_symndx);
4904 if (s == NULL)
4905 return FALSE;
4906
4907 vpp = &elf_section_data (s)->local_dynrel;
4908 head = (struct ppc_dyn_relocs **) vpp;
4909 }
4910
4911 p = *head;
4912 if (p == NULL || p->sec != sec)
4913 {
4914 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4915 if (p == NULL)
4916 return FALSE;
4917 p->next = *head;
4918 *head = p;
4919 p->sec = sec;
4920 p->count = 0;
4921 p->pc_count = 0;
4922 }
4923
4924 p->count += 1;
4925 if (!MUST_BE_DYN_RELOC (r_type))
4926 p->pc_count += 1;
4927 }
4928 break;
4929
4930 default:
4931 break;
4932 }
4933 }
4934
4935 return TRUE;
4936 }
4937
4938 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4939 of the code entry point, and its section. */
4940
4941 static bfd_vma
4942 opd_entry_value (asection *opd_sec,
4943 bfd_vma offset,
4944 asection **code_sec,
4945 bfd_vma *code_off)
4946 {
4947 bfd *opd_bfd = opd_sec->owner;
4948 Elf_Internal_Rela *relocs;
4949 Elf_Internal_Rela *lo, *hi, *look;
4950 bfd_vma val;
4951
4952 /* No relocs implies we are linking a --just-symbols object. */
4953 if (opd_sec->reloc_count == 0)
4954 {
4955 bfd_vma val;
4956
4957 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4958 return (bfd_vma) -1;
4959
4960 if (code_sec != NULL)
4961 {
4962 asection *sec, *likely = NULL;
4963 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4964 if (sec->vma <= val
4965 && (sec->flags & SEC_LOAD) != 0
4966 && (sec->flags & SEC_ALLOC) != 0)
4967 likely = sec;
4968 if (likely != NULL)
4969 {
4970 *code_sec = likely;
4971 if (code_off != NULL)
4972 *code_off = val - likely->vma;
4973 }
4974 }
4975 return val;
4976 }
4977
4978 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4979 if (relocs == NULL)
4980 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4981
4982 /* Go find the opd reloc at the sym address. */
4983 lo = relocs;
4984 BFD_ASSERT (lo != NULL);
4985 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4986 val = (bfd_vma) -1;
4987 while (lo < hi)
4988 {
4989 look = lo + (hi - lo) / 2;
4990 if (look->r_offset < offset)
4991 lo = look + 1;
4992 else if (look->r_offset > offset)
4993 hi = look;
4994 else
4995 {
4996 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4997 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4998 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4999 {
5000 unsigned long symndx = ELF64_R_SYM (look->r_info);
5001 asection *sec;
5002
5003 if (symndx < symtab_hdr->sh_info)
5004 {
5005 Elf_Internal_Sym *sym;
5006
5007 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5008 if (sym == NULL)
5009 {
5010 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5011 symtab_hdr->sh_info,
5012 0, NULL, NULL, NULL);
5013 if (sym == NULL)
5014 break;
5015 symtab_hdr->contents = (bfd_byte *) sym;
5016 }
5017
5018 sym += symndx;
5019 val = sym->st_value;
5020 sec = NULL;
5021 if ((sym->st_shndx != SHN_UNDEF
5022 && sym->st_shndx < SHN_LORESERVE)
5023 || sym->st_shndx > SHN_HIRESERVE)
5024 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5025 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5026 }
5027 else
5028 {
5029 struct elf_link_hash_entry **sym_hashes;
5030 struct elf_link_hash_entry *rh;
5031
5032 sym_hashes = elf_sym_hashes (opd_bfd);
5033 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5034 while (rh->root.type == bfd_link_hash_indirect
5035 || rh->root.type == bfd_link_hash_warning)
5036 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5037 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5038 || rh->root.type == bfd_link_hash_defweak);
5039 val = rh->root.u.def.value;
5040 sec = rh->root.u.def.section;
5041 }
5042 val += look->r_addend;
5043 if (code_off != NULL)
5044 *code_off = val;
5045 if (code_sec != NULL)
5046 *code_sec = sec;
5047 if (sec != NULL && sec->output_section != NULL)
5048 val += sec->output_section->vma + sec->output_offset;
5049 }
5050 break;
5051 }
5052 }
5053
5054 return val;
5055 }
5056
5057 /* Mark sections containing dynamically referenced symbols. When
5058 building shared libraries, we must assume that any visible symbol is
5059 referenced. */
5060
5061 static bfd_boolean
5062 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5063 {
5064 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5065 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5066
5067 if (eh->elf.root.type == bfd_link_hash_warning)
5068 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5069
5070 /* Dynamic linking info is on the func descriptor sym. */
5071 if (eh->oh != NULL
5072 && eh->oh->is_func_descriptor
5073 && (eh->oh->elf.root.type == bfd_link_hash_defined
5074 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5075 eh = eh->oh;
5076
5077 if ((eh->elf.root.type == bfd_link_hash_defined
5078 || eh->elf.root.type == bfd_link_hash_defweak)
5079 && (eh->elf.ref_dynamic
5080 || (!info->executable
5081 && eh->elf.def_regular
5082 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5083 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5084 {
5085 asection *code_sec;
5086
5087 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5088
5089 /* Function descriptor syms cause the associated
5090 function code sym section to be marked. */
5091 if (eh->is_func_descriptor
5092 && (eh->oh->elf.root.type == bfd_link_hash_defined
5093 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5094 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5095 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5096 && opd_entry_value (eh->elf.root.u.def.section,
5097 eh->elf.root.u.def.value,
5098 &code_sec, NULL) != (bfd_vma) -1)
5099 code_sec->flags |= SEC_KEEP;
5100 }
5101
5102 return TRUE;
5103 }
5104
5105 /* Return the section that should be marked against GC for a given
5106 relocation. */
5107
5108 static asection *
5109 ppc64_elf_gc_mark_hook (asection *sec,
5110 struct bfd_link_info *info,
5111 Elf_Internal_Rela *rel,
5112 struct elf_link_hash_entry *h,
5113 Elf_Internal_Sym *sym)
5114 {
5115 asection *rsec;
5116
5117 /* First mark all our entry sym sections. */
5118 if (info->gc_sym_list != NULL)
5119 {
5120 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5121 struct bfd_sym_chain *sym = info->gc_sym_list;
5122
5123 info->gc_sym_list = NULL;
5124 for (; sym != NULL; sym = sym->next)
5125 {
5126 struct ppc_link_hash_entry *eh;
5127
5128 eh = (struct ppc_link_hash_entry *)
5129 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5130 if (eh == NULL)
5131 continue;
5132 if (eh->elf.root.type != bfd_link_hash_defined
5133 && eh->elf.root.type != bfd_link_hash_defweak)
5134 continue;
5135
5136 if (eh->is_func_descriptor
5137 && (eh->oh->elf.root.type == bfd_link_hash_defined
5138 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5139 rsec = eh->oh->elf.root.u.def.section;
5140 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5141 && opd_entry_value (eh->elf.root.u.def.section,
5142 eh->elf.root.u.def.value,
5143 &rsec, NULL) != (bfd_vma) -1)
5144 ;
5145 else
5146 continue;
5147
5148 if (!rsec->gc_mark)
5149 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5150
5151 rsec = eh->elf.root.u.def.section;
5152 if (!rsec->gc_mark)
5153 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5154 }
5155 }
5156
5157 /* Syms return NULL if we're marking .opd, so we avoid marking all
5158 function sections, as all functions are referenced in .opd. */
5159 rsec = NULL;
5160 if (get_opd_info (sec) != NULL)
5161 return rsec;
5162
5163 if (h != NULL)
5164 {
5165 enum elf_ppc64_reloc_type r_type;
5166 struct ppc_link_hash_entry *eh;
5167
5168 r_type = ELF64_R_TYPE (rel->r_info);
5169 switch (r_type)
5170 {
5171 case R_PPC64_GNU_VTINHERIT:
5172 case R_PPC64_GNU_VTENTRY:
5173 break;
5174
5175 default:
5176 switch (h->root.type)
5177 {
5178 case bfd_link_hash_defined:
5179 case bfd_link_hash_defweak:
5180 eh = (struct ppc_link_hash_entry *) h;
5181 if (eh->oh != NULL
5182 && eh->oh->is_func_descriptor
5183 && (eh->oh->elf.root.type == bfd_link_hash_defined
5184 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5185 eh = eh->oh;
5186
5187 /* Function descriptor syms cause the associated
5188 function code sym section to be marked. */
5189 if (eh->is_func_descriptor
5190 && (eh->oh->elf.root.type == bfd_link_hash_defined
5191 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5192 {
5193 /* They also mark their opd section. */
5194 if (!eh->elf.root.u.def.section->gc_mark)
5195 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5196 ppc64_elf_gc_mark_hook);
5197
5198 rsec = eh->oh->elf.root.u.def.section;
5199 }
5200 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5201 && opd_entry_value (eh->elf.root.u.def.section,
5202 eh->elf.root.u.def.value,
5203 &rsec, NULL) != (bfd_vma) -1)
5204 {
5205 if (!eh->elf.root.u.def.section->gc_mark)
5206 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5207 ppc64_elf_gc_mark_hook);
5208 }
5209 else
5210 rsec = h->root.u.def.section;
5211 break;
5212
5213 case bfd_link_hash_common:
5214 rsec = h->root.u.c.p->section;
5215 break;
5216
5217 default:
5218 break;
5219 }
5220 }
5221 }
5222 else
5223 {
5224 asection **opd_sym_section;
5225
5226 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5227 opd_sym_section = get_opd_info (rsec);
5228 if (opd_sym_section != NULL)
5229 {
5230 if (!rsec->gc_mark)
5231 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5232
5233 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5234 }
5235 }
5236
5237 return rsec;
5238 }
5239
5240 /* Update the .got, .plt. and dynamic reloc reference counts for the
5241 section being removed. */
5242
5243 static bfd_boolean
5244 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5245 asection *sec, const Elf_Internal_Rela *relocs)
5246 {
5247 struct ppc_link_hash_table *htab;
5248 Elf_Internal_Shdr *symtab_hdr;
5249 struct elf_link_hash_entry **sym_hashes;
5250 struct got_entry **local_got_ents;
5251 const Elf_Internal_Rela *rel, *relend;
5252
5253 if ((sec->flags & SEC_ALLOC) == 0)
5254 return TRUE;
5255
5256 elf_section_data (sec)->local_dynrel = NULL;
5257
5258 htab = ppc_hash_table (info);
5259 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5260 sym_hashes = elf_sym_hashes (abfd);
5261 local_got_ents = elf_local_got_ents (abfd);
5262
5263 relend = relocs + sec->reloc_count;
5264 for (rel = relocs; rel < relend; rel++)
5265 {
5266 unsigned long r_symndx;
5267 enum elf_ppc64_reloc_type r_type;
5268 struct elf_link_hash_entry *h = NULL;
5269 char tls_type = 0;
5270
5271 r_symndx = ELF64_R_SYM (rel->r_info);
5272 r_type = ELF64_R_TYPE (rel->r_info);
5273 if (r_symndx >= symtab_hdr->sh_info)
5274 {
5275 struct ppc_link_hash_entry *eh;
5276 struct ppc_dyn_relocs **pp;
5277 struct ppc_dyn_relocs *p;
5278
5279 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5280 while (h->root.type == bfd_link_hash_indirect
5281 || h->root.type == bfd_link_hash_warning)
5282 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5283 eh = (struct ppc_link_hash_entry *) h;
5284
5285 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5286 if (p->sec == sec)
5287 {
5288 /* Everything must go for SEC. */
5289 *pp = p->next;
5290 break;
5291 }
5292 }
5293
5294 switch (r_type)
5295 {
5296 case R_PPC64_GOT_TLSLD16:
5297 case R_PPC64_GOT_TLSLD16_LO:
5298 case R_PPC64_GOT_TLSLD16_HI:
5299 case R_PPC64_GOT_TLSLD16_HA:
5300 ppc64_tlsld_got (abfd)->refcount -= 1;
5301 tls_type = TLS_TLS | TLS_LD;
5302 goto dogot;
5303
5304 case R_PPC64_GOT_TLSGD16:
5305 case R_PPC64_GOT_TLSGD16_LO:
5306 case R_PPC64_GOT_TLSGD16_HI:
5307 case R_PPC64_GOT_TLSGD16_HA:
5308 tls_type = TLS_TLS | TLS_GD;
5309 goto dogot;
5310
5311 case R_PPC64_GOT_TPREL16_DS:
5312 case R_PPC64_GOT_TPREL16_LO_DS:
5313 case R_PPC64_GOT_TPREL16_HI:
5314 case R_PPC64_GOT_TPREL16_HA:
5315 tls_type = TLS_TLS | TLS_TPREL;
5316 goto dogot;
5317
5318 case R_PPC64_GOT_DTPREL16_DS:
5319 case R_PPC64_GOT_DTPREL16_LO_DS:
5320 case R_PPC64_GOT_DTPREL16_HI:
5321 case R_PPC64_GOT_DTPREL16_HA:
5322 tls_type = TLS_TLS | TLS_DTPREL;
5323 goto dogot;
5324
5325 case R_PPC64_GOT16:
5326 case R_PPC64_GOT16_DS:
5327 case R_PPC64_GOT16_HA:
5328 case R_PPC64_GOT16_HI:
5329 case R_PPC64_GOT16_LO:
5330 case R_PPC64_GOT16_LO_DS:
5331 dogot:
5332 {
5333 struct got_entry *ent;
5334
5335 if (h != NULL)
5336 ent = h->got.glist;
5337 else
5338 ent = local_got_ents[r_symndx];
5339
5340 for (; ent != NULL; ent = ent->next)
5341 if (ent->addend == rel->r_addend
5342 && ent->owner == abfd
5343 && ent->tls_type == tls_type)
5344 break;
5345 if (ent == NULL)
5346 abort ();
5347 if (ent->got.refcount > 0)
5348 ent->got.refcount -= 1;
5349 }
5350 break;
5351
5352 case R_PPC64_PLT16_HA:
5353 case R_PPC64_PLT16_HI:
5354 case R_PPC64_PLT16_LO:
5355 case R_PPC64_PLT32:
5356 case R_PPC64_PLT64:
5357 case R_PPC64_REL14:
5358 case R_PPC64_REL14_BRNTAKEN:
5359 case R_PPC64_REL14_BRTAKEN:
5360 case R_PPC64_REL24:
5361 if (h != NULL)
5362 {
5363 struct plt_entry *ent;
5364
5365 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5366 if (ent->addend == rel->r_addend)
5367 break;
5368 if (ent == NULL)
5369 abort ();
5370 if (ent->plt.refcount > 0)
5371 ent->plt.refcount -= 1;
5372 }
5373 break;
5374
5375 default:
5376 break;
5377 }
5378 }
5379 return TRUE;
5380 }
5381
5382 /* The maximum size of .sfpr. */
5383 #define SFPR_MAX (218*4)
5384
5385 struct sfpr_def_parms
5386 {
5387 const char name[12];
5388 unsigned char lo, hi;
5389 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5390 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5391 };
5392
5393 /* Auto-generate _save*, _rest* functions in .sfpr. */
5394
5395 static unsigned int
5396 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5397 {
5398 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5399 unsigned int i;
5400 size_t len = strlen (parm->name);
5401 bfd_boolean writing = FALSE;
5402 char sym[16];
5403
5404 memcpy (sym, parm->name, len);
5405 sym[len + 2] = 0;
5406
5407 for (i = parm->lo; i <= parm->hi; i++)
5408 {
5409 struct elf_link_hash_entry *h;
5410
5411 sym[len + 0] = i / 10 + '0';
5412 sym[len + 1] = i % 10 + '0';
5413 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5414 if (h != NULL
5415 && !h->def_regular)
5416 {
5417 h->root.type = bfd_link_hash_defined;
5418 h->root.u.def.section = htab->sfpr;
5419 h->root.u.def.value = htab->sfpr->size;
5420 h->type = STT_FUNC;
5421 h->def_regular = 1;
5422 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5423 writing = TRUE;
5424 if (htab->sfpr->contents == NULL)
5425 {
5426 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5427 if (htab->sfpr->contents == NULL)
5428 return FALSE;
5429 }
5430 }
5431 if (writing)
5432 {
5433 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5434 if (i != parm->hi)
5435 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5436 else
5437 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5438 htab->sfpr->size = p - htab->sfpr->contents;
5439 }
5440 }
5441
5442 return TRUE;
5443 }
5444
5445 static bfd_byte *
5446 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5447 {
5448 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5449 return p + 4;
5450 }
5451
5452 static bfd_byte *
5453 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5454 {
5455 p = savegpr0 (abfd, p, r);
5456 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5457 p = p + 4;
5458 bfd_put_32 (abfd, BLR, p);
5459 return p + 4;
5460 }
5461
5462 static bfd_byte *
5463 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5464 {
5465 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5466 return p + 4;
5467 }
5468
5469 static bfd_byte *
5470 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5471 {
5472 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5473 p = p + 4;
5474 p = restgpr0 (abfd, p, r);
5475 bfd_put_32 (abfd, MTLR_R0, p);
5476 p = p + 4;
5477 if (r == 29)
5478 {
5479 p = restgpr0 (abfd, p, 30);
5480 p = restgpr0 (abfd, p, 31);
5481 }
5482 bfd_put_32 (abfd, BLR, p);
5483 return p + 4;
5484 }
5485
5486 static bfd_byte *
5487 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5488 {
5489 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5490 return p + 4;
5491 }
5492
5493 static bfd_byte *
5494 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5495 {
5496 p = savegpr1 (abfd, p, r);
5497 bfd_put_32 (abfd, BLR, p);
5498 return p + 4;
5499 }
5500
5501 static bfd_byte *
5502 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5503 {
5504 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5505 return p + 4;
5506 }
5507
5508 static bfd_byte *
5509 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5510 {
5511 p = restgpr1 (abfd, p, r);
5512 bfd_put_32 (abfd, BLR, p);
5513 return p + 4;
5514 }
5515
5516 static bfd_byte *
5517 savefpr (bfd *abfd, bfd_byte *p, int r)
5518 {
5519 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5520 return p + 4;
5521 }
5522
5523 static bfd_byte *
5524 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5525 {
5526 p = savefpr (abfd, p, r);
5527 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5528 p = p + 4;
5529 bfd_put_32 (abfd, BLR, p);
5530 return p + 4;
5531 }
5532
5533 static bfd_byte *
5534 restfpr (bfd *abfd, bfd_byte *p, int r)
5535 {
5536 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5537 return p + 4;
5538 }
5539
5540 static bfd_byte *
5541 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5542 {
5543 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5544 p = p + 4;
5545 p = restfpr (abfd, p, r);
5546 bfd_put_32 (abfd, MTLR_R0, p);
5547 p = p + 4;
5548 if (r == 29)
5549 {
5550 p = restfpr (abfd, p, 30);
5551 p = restfpr (abfd, p, 31);
5552 }
5553 bfd_put_32 (abfd, BLR, p);
5554 return p + 4;
5555 }
5556
5557 static bfd_byte *
5558 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5559 {
5560 p = savefpr (abfd, p, r);
5561 bfd_put_32 (abfd, BLR, p);
5562 return p + 4;
5563 }
5564
5565 static bfd_byte *
5566 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5567 {
5568 p = restfpr (abfd, p, r);
5569 bfd_put_32 (abfd, BLR, p);
5570 return p + 4;
5571 }
5572
5573 static bfd_byte *
5574 savevr (bfd *abfd, bfd_byte *p, int r)
5575 {
5576 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5577 p = p + 4;
5578 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5579 return p + 4;
5580 }
5581
5582 static bfd_byte *
5583 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5584 {
5585 p = savevr (abfd, p, r);
5586 bfd_put_32 (abfd, BLR, p);
5587 return p + 4;
5588 }
5589
5590 static bfd_byte *
5591 restvr (bfd *abfd, bfd_byte *p, int r)
5592 {
5593 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5594 p = p + 4;
5595 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5596 return p + 4;
5597 }
5598
5599 static bfd_byte *
5600 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5601 {
5602 p = restvr (abfd, p, r);
5603 bfd_put_32 (abfd, BLR, p);
5604 return p + 4;
5605 }
5606
5607 /* Called via elf_link_hash_traverse to transfer dynamic linking
5608 information on function code symbol entries to their corresponding
5609 function descriptor symbol entries. */
5610
5611 static bfd_boolean
5612 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5613 {
5614 struct bfd_link_info *info;
5615 struct ppc_link_hash_table *htab;
5616 struct plt_entry *ent;
5617 struct ppc_link_hash_entry *fh;
5618 struct ppc_link_hash_entry *fdh;
5619 bfd_boolean force_local;
5620
5621 fh = (struct ppc_link_hash_entry *) h;
5622 if (fh->elf.root.type == bfd_link_hash_indirect)
5623 return TRUE;
5624
5625 if (fh->elf.root.type == bfd_link_hash_warning)
5626 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5627
5628 info = inf;
5629 htab = ppc_hash_table (info);
5630
5631 /* Resolve undefined references to dot-symbols as the value
5632 in the function descriptor, if we have one in a regular object.
5633 This is to satisfy cases like ".quad .foo". Calls to functions
5634 in dynamic objects are handled elsewhere. */
5635 if (fh->elf.root.type == bfd_link_hash_undefweak
5636 && fh->was_undefined
5637 && (fh->oh->elf.root.type == bfd_link_hash_defined
5638 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5639 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5640 && opd_entry_value (fh->oh->elf.root.u.def.section,
5641 fh->oh->elf.root.u.def.value,
5642 &fh->elf.root.u.def.section,
5643 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5644 {
5645 fh->elf.root.type = fh->oh->elf.root.type;
5646 fh->elf.forced_local = 1;
5647 }
5648
5649 /* If this is a function code symbol, transfer dynamic linking
5650 information to the function descriptor symbol. */
5651 if (!fh->is_func)
5652 return TRUE;
5653
5654 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5655 if (ent->plt.refcount > 0)
5656 break;
5657 if (ent == NULL
5658 || fh->elf.root.root.string[0] != '.'
5659 || fh->elf.root.root.string[1] == '\0')
5660 return TRUE;
5661
5662 /* Find the corresponding function descriptor symbol. Create it
5663 as undefined if necessary. */
5664
5665 fdh = get_fdh (fh, htab);
5666 if (fdh != NULL)
5667 while (fdh->elf.root.type == bfd_link_hash_indirect
5668 || fdh->elf.root.type == bfd_link_hash_warning)
5669 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5670
5671 if (fdh == NULL
5672 && info->shared
5673 && (fh->elf.root.type == bfd_link_hash_undefined
5674 || fh->elf.root.type == bfd_link_hash_undefweak))
5675 {
5676 fdh = make_fdh (info, fh);
5677 if (fdh == NULL)
5678 return FALSE;
5679 }
5680
5681 /* Fake function descriptors are made undefweak. If the function
5682 code symbol is strong undefined, make the fake sym the same.
5683 If the function code symbol is defined, then force the fake
5684 descriptor local; We can't support overriding of symbols in a
5685 shared library on a fake descriptor. */
5686
5687 if (fdh != NULL
5688 && fdh->fake
5689 && fdh->elf.root.type == bfd_link_hash_undefweak)
5690 {
5691 if (fh->elf.root.type == bfd_link_hash_undefined)
5692 {
5693 fdh->elf.root.type = bfd_link_hash_undefined;
5694 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5695 }
5696 else if (fh->elf.root.type == bfd_link_hash_defined
5697 || fh->elf.root.type == bfd_link_hash_defweak)
5698 {
5699 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5700 }
5701 }
5702
5703 if (fdh != NULL
5704 && !fdh->elf.forced_local
5705 && (info->shared
5706 || fdh->elf.def_dynamic
5707 || fdh->elf.ref_dynamic
5708 || (fdh->elf.root.type == bfd_link_hash_undefweak
5709 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5710 {
5711 if (fdh->elf.dynindx == -1)
5712 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5713 return FALSE;
5714 fdh->elf.ref_regular |= fh->elf.ref_regular;
5715 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5716 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5717 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5718 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5719 {
5720 move_plt_plist (fh, fdh);
5721 fdh->elf.needs_plt = 1;
5722 }
5723 fdh->is_func_descriptor = 1;
5724 fdh->oh = fh;
5725 fh->oh = fdh;
5726 }
5727
5728 /* Now that the info is on the function descriptor, clear the
5729 function code sym info. Any function code syms for which we
5730 don't have a definition in a regular file, we force local.
5731 This prevents a shared library from exporting syms that have
5732 been imported from another library. Function code syms that
5733 are really in the library we must leave global to prevent the
5734 linker dragging in a definition from a static library. */
5735 force_local = (!fh->elf.def_regular
5736 || fdh == NULL
5737 || !fdh->elf.def_regular
5738 || fdh->elf.forced_local);
5739 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5740
5741 return TRUE;
5742 }
5743
5744 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5745 this hook to a) provide some gcc support functions, and b) transfer
5746 dynamic linking information gathered so far on function code symbol
5747 entries, to their corresponding function descriptor symbol entries. */
5748
5749 static bfd_boolean
5750 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5751 struct bfd_link_info *info)
5752 {
5753 struct ppc_link_hash_table *htab;
5754 unsigned int i;
5755 const struct sfpr_def_parms funcs[] =
5756 {
5757 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5758 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5759 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5760 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5761 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5762 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5763 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5764 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5765 { "._savef", 14, 31, savefpr, savefpr1_tail },
5766 { "._restf", 14, 31, restfpr, restfpr1_tail },
5767 { "_savevr_", 20, 31, savevr, savevr_tail },
5768 { "_restvr_", 20, 31, restvr, restvr_tail }
5769 };
5770
5771 htab = ppc_hash_table (info);
5772 if (htab->sfpr == NULL)
5773 /* We don't have any relocs. */
5774 return TRUE;
5775
5776 /* Provide any missing _save* and _rest* functions. */
5777 htab->sfpr->size = 0;
5778 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5779 if (!sfpr_define (info, &funcs[i]))
5780 return FALSE;
5781
5782 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5783
5784 if (htab->sfpr->size == 0)
5785 htab->sfpr->flags |= SEC_EXCLUDE;
5786
5787 return TRUE;
5788 }
5789
5790 /* Adjust a symbol defined by a dynamic object and referenced by a
5791 regular object. The current definition is in some section of the
5792 dynamic object, but we're not including those sections. We have to
5793 change the definition to something the rest of the link can
5794 understand. */
5795
5796 static bfd_boolean
5797 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5798 struct elf_link_hash_entry *h)
5799 {
5800 struct ppc_link_hash_table *htab;
5801 asection *s;
5802 unsigned int power_of_two;
5803
5804 htab = ppc_hash_table (info);
5805
5806 /* Deal with function syms. */
5807 if (h->type == STT_FUNC
5808 || h->needs_plt)
5809 {
5810 /* Clear procedure linkage table information for any symbol that
5811 won't need a .plt entry. */
5812 struct plt_entry *ent;
5813 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5814 if (ent->plt.refcount > 0)
5815 break;
5816 if (ent == NULL
5817 || SYMBOL_CALLS_LOCAL (info, h)
5818 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5819 && h->root.type == bfd_link_hash_undefweak))
5820 {
5821 h->plt.plist = NULL;
5822 h->needs_plt = 0;
5823 }
5824 }
5825 else
5826 h->plt.plist = NULL;
5827
5828 /* If this is a weak symbol, and there is a real definition, the
5829 processor independent code will have arranged for us to see the
5830 real definition first, and we can just use the same value. */
5831 if (h->u.weakdef != NULL)
5832 {
5833 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5834 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5835 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5836 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5837 if (ELIMINATE_COPY_RELOCS)
5838 h->non_got_ref = h->u.weakdef->non_got_ref;
5839 return TRUE;
5840 }
5841
5842 /* If we are creating a shared library, we must presume that the
5843 only references to the symbol are via the global offset table.
5844 For such cases we need not do anything here; the relocations will
5845 be handled correctly by relocate_section. */
5846 if (info->shared)
5847 return TRUE;
5848
5849 /* If there are no references to this symbol that do not use the
5850 GOT, we don't need to generate a copy reloc. */
5851 if (!h->non_got_ref)
5852 return TRUE;
5853
5854 if (ELIMINATE_COPY_RELOCS)
5855 {
5856 struct ppc_link_hash_entry * eh;
5857 struct ppc_dyn_relocs *p;
5858
5859 eh = (struct ppc_link_hash_entry *) h;
5860 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5861 {
5862 s = p->sec->output_section;
5863 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5864 break;
5865 }
5866
5867 /* If we didn't find any dynamic relocs in read-only sections, then
5868 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5869 if (p == NULL)
5870 {
5871 h->non_got_ref = 0;
5872 return TRUE;
5873 }
5874 }
5875
5876 if (h->plt.plist != NULL)
5877 {
5878 /* We should never get here, but unfortunately there are versions
5879 of gcc out there that improperly (for this ABI) put initialized
5880 function pointers, vtable refs and suchlike in read-only
5881 sections. Allow them to proceed, but warn that this might
5882 break at runtime. */
5883 (*_bfd_error_handler)
5884 (_("copy reloc against `%s' requires lazy plt linking; "
5885 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5886 h->root.root.string);
5887 }
5888
5889 /* This is a reference to a symbol defined by a dynamic object which
5890 is not a function. */
5891
5892 if (h->size == 0)
5893 {
5894 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5895 h->root.root.string);
5896 return TRUE;
5897 }
5898
5899 /* We must allocate the symbol in our .dynbss section, which will
5900 become part of the .bss section of the executable. There will be
5901 an entry for this symbol in the .dynsym section. The dynamic
5902 object will contain position independent code, so all references
5903 from the dynamic object to this symbol will go through the global
5904 offset table. The dynamic linker will use the .dynsym entry to
5905 determine the address it must put in the global offset table, so
5906 both the dynamic object and the regular object will refer to the
5907 same memory location for the variable. */
5908
5909 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5910 to copy the initial value out of the dynamic object and into the
5911 runtime process image. We need to remember the offset into the
5912 .rela.bss section we are going to use. */
5913 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5914 {
5915 htab->relbss->size += sizeof (Elf64_External_Rela);
5916 h->needs_copy = 1;
5917 }
5918
5919 /* We need to figure out the alignment required for this symbol. I
5920 have no idea how ELF linkers handle this. */
5921 power_of_two = bfd_log2 (h->size);
5922 if (power_of_two > 4)
5923 power_of_two = 4;
5924
5925 /* Apply the required alignment. */
5926 s = htab->dynbss;
5927 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5928 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5929 {
5930 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5931 return FALSE;
5932 }
5933
5934 /* Define the symbol as being at this point in the section. */
5935 h->root.u.def.section = s;
5936 h->root.u.def.value = s->size;
5937
5938 /* Increment the section size to make room for the symbol. */
5939 s->size += h->size;
5940
5941 return TRUE;
5942 }
5943
5944 /* If given a function descriptor symbol, hide both the function code
5945 sym and the descriptor. */
5946 static void
5947 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5948 struct elf_link_hash_entry *h,
5949 bfd_boolean force_local)
5950 {
5951 struct ppc_link_hash_entry *eh;
5952 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5953
5954 eh = (struct ppc_link_hash_entry *) h;
5955 if (eh->is_func_descriptor)
5956 {
5957 struct ppc_link_hash_entry *fh = eh->oh;
5958
5959 if (fh == NULL)
5960 {
5961 const char *p, *q;
5962 struct ppc_link_hash_table *htab;
5963 char save;
5964
5965 /* We aren't supposed to use alloca in BFD because on
5966 systems which do not have alloca the version in libiberty
5967 calls xmalloc, which might cause the program to crash
5968 when it runs out of memory. This function doesn't have a
5969 return status, so there's no way to gracefully return an
5970 error. So cheat. We know that string[-1] can be safely
5971 accessed; It's either a string in an ELF string table,
5972 or allocated in an objalloc structure. */
5973
5974 p = eh->elf.root.root.string - 1;
5975 save = *p;
5976 *(char *) p = '.';
5977 htab = ppc_hash_table (info);
5978 fh = (struct ppc_link_hash_entry *)
5979 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5980 *(char *) p = save;
5981
5982 /* Unfortunately, if it so happens that the string we were
5983 looking for was allocated immediately before this string,
5984 then we overwrote the string terminator. That's the only
5985 reason the lookup should fail. */
5986 if (fh == NULL)
5987 {
5988 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5989 while (q >= eh->elf.root.root.string && *q == *p)
5990 --q, --p;
5991 if (q < eh->elf.root.root.string && *p == '.')
5992 fh = (struct ppc_link_hash_entry *)
5993 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5994 }
5995 if (fh != NULL)
5996 {
5997 eh->oh = fh;
5998 fh->oh = eh;
5999 }
6000 }
6001 if (fh != NULL)
6002 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6003 }
6004 }
6005
6006 static bfd_boolean
6007 get_sym_h (struct elf_link_hash_entry **hp,
6008 Elf_Internal_Sym **symp,
6009 asection **symsecp,
6010 char **tls_maskp,
6011 Elf_Internal_Sym **locsymsp,
6012 unsigned long r_symndx,
6013 bfd *ibfd)
6014 {
6015 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6016
6017 if (r_symndx >= symtab_hdr->sh_info)
6018 {
6019 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6020 struct elf_link_hash_entry *h;
6021
6022 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6023 while (h->root.type == bfd_link_hash_indirect
6024 || h->root.type == bfd_link_hash_warning)
6025 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6026
6027 if (hp != NULL)
6028 *hp = h;
6029
6030 if (symp != NULL)
6031 *symp = NULL;
6032
6033 if (symsecp != NULL)
6034 {
6035 asection *symsec = NULL;
6036 if (h->root.type == bfd_link_hash_defined
6037 || h->root.type == bfd_link_hash_defweak)
6038 symsec = h->root.u.def.section;
6039 *symsecp = symsec;
6040 }
6041
6042 if (tls_maskp != NULL)
6043 {
6044 struct ppc_link_hash_entry *eh;
6045
6046 eh = (struct ppc_link_hash_entry *) h;
6047 *tls_maskp = &eh->tls_mask;
6048 }
6049 }
6050 else
6051 {
6052 Elf_Internal_Sym *sym;
6053 Elf_Internal_Sym *locsyms = *locsymsp;
6054
6055 if (locsyms == NULL)
6056 {
6057 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6058 if (locsyms == NULL)
6059 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6060 symtab_hdr->sh_info,
6061 0, NULL, NULL, NULL);
6062 if (locsyms == NULL)
6063 return FALSE;
6064 *locsymsp = locsyms;
6065 }
6066 sym = locsyms + r_symndx;
6067
6068 if (hp != NULL)
6069 *hp = NULL;
6070
6071 if (symp != NULL)
6072 *symp = sym;
6073
6074 if (symsecp != NULL)
6075 {
6076 asection *symsec = NULL;
6077 if ((sym->st_shndx != SHN_UNDEF
6078 && sym->st_shndx < SHN_LORESERVE)
6079 || sym->st_shndx > SHN_HIRESERVE)
6080 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6081 *symsecp = symsec;
6082 }
6083
6084 if (tls_maskp != NULL)
6085 {
6086 struct got_entry **lgot_ents;
6087 char *tls_mask;
6088
6089 tls_mask = NULL;
6090 lgot_ents = elf_local_got_ents (ibfd);
6091 if (lgot_ents != NULL)
6092 {
6093 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6094 tls_mask = &lgot_masks[r_symndx];
6095 }
6096 *tls_maskp = tls_mask;
6097 }
6098 }
6099 return TRUE;
6100 }
6101
6102 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6103 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6104 type suitable for optimization, and 1 otherwise. */
6105
6106 static int
6107 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6108 Elf_Internal_Sym **locsymsp,
6109 const Elf_Internal_Rela *rel, bfd *ibfd)
6110 {
6111 unsigned long r_symndx;
6112 int next_r;
6113 struct elf_link_hash_entry *h;
6114 Elf_Internal_Sym *sym;
6115 asection *sec;
6116 bfd_vma off;
6117
6118 r_symndx = ELF64_R_SYM (rel->r_info);
6119 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6120 return 0;
6121
6122 if ((*tls_maskp != NULL && **tls_maskp != 0)
6123 || sec == NULL
6124 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6125 return 1;
6126
6127 /* Look inside a TOC section too. */
6128 if (h != NULL)
6129 {
6130 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6131 off = h->root.u.def.value;
6132 }
6133 else
6134 off = sym->st_value;
6135 off += rel->r_addend;
6136 BFD_ASSERT (off % 8 == 0);
6137 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6138 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6139 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6140 return 0;
6141 if (toc_symndx != NULL)
6142 *toc_symndx = r_symndx;
6143 if ((h == NULL
6144 || ((h->root.type == bfd_link_hash_defined
6145 || h->root.type == bfd_link_hash_defweak)
6146 && !h->def_dynamic))
6147 && (next_r == -1 || next_r == -2))
6148 return 1 - next_r;
6149 return 1;
6150 }
6151
6152 /* Adjust all global syms defined in opd sections. In gcc generated
6153 code for the old ABI, these will already have been done. */
6154
6155 static bfd_boolean
6156 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6157 {
6158 struct ppc_link_hash_entry *eh;
6159 asection *sym_sec;
6160 long *opd_adjust;
6161
6162 if (h->root.type == bfd_link_hash_indirect)
6163 return TRUE;
6164
6165 if (h->root.type == bfd_link_hash_warning)
6166 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6167
6168 if (h->root.type != bfd_link_hash_defined
6169 && h->root.type != bfd_link_hash_defweak)
6170 return TRUE;
6171
6172 eh = (struct ppc_link_hash_entry *) h;
6173 if (eh->adjust_done)
6174 return TRUE;
6175
6176 sym_sec = eh->elf.root.u.def.section;
6177 opd_adjust = get_opd_info (sym_sec);
6178 if (opd_adjust != NULL)
6179 {
6180 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6181 if (adjust == -1)
6182 {
6183 /* This entry has been deleted. */
6184 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6185 if (dsec == NULL)
6186 {
6187 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6188 if (elf_discarded_section (dsec))
6189 {
6190 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6191 break;
6192 }
6193 }
6194 eh->elf.root.u.def.value = 0;
6195 eh->elf.root.u.def.section = dsec;
6196 }
6197 else
6198 eh->elf.root.u.def.value += adjust;
6199 eh->adjust_done = 1;
6200 }
6201 return TRUE;
6202 }
6203
6204 /* Handles decrementing dynamic reloc counts for the reloc specified by
6205 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6206 have already been determined. */
6207
6208 static bfd_boolean
6209 dec_dynrel_count (bfd_vma r_info,
6210 asection *sec,
6211 struct bfd_link_info *info,
6212 Elf_Internal_Sym **local_syms,
6213 struct elf_link_hash_entry *h,
6214 asection *sym_sec)
6215 {
6216 enum elf_ppc64_reloc_type r_type;
6217 struct ppc_dyn_relocs *p;
6218 struct ppc_dyn_relocs **pp;
6219
6220 /* Can this reloc be dynamic? This switch, and later tests here
6221 should be kept in sync with the code in check_relocs. */
6222 r_type = ELF64_R_TYPE (r_info);
6223 switch (r_type)
6224 {
6225 default:
6226 return TRUE;
6227
6228 case R_PPC64_TPREL16:
6229 case R_PPC64_TPREL16_LO:
6230 case R_PPC64_TPREL16_HI:
6231 case R_PPC64_TPREL16_HA:
6232 case R_PPC64_TPREL16_DS:
6233 case R_PPC64_TPREL16_LO_DS:
6234 case R_PPC64_TPREL16_HIGHER:
6235 case R_PPC64_TPREL16_HIGHERA:
6236 case R_PPC64_TPREL16_HIGHEST:
6237 case R_PPC64_TPREL16_HIGHESTA:
6238 if (!info->shared)
6239 return TRUE;
6240
6241 case R_PPC64_TPREL64:
6242 case R_PPC64_DTPMOD64:
6243 case R_PPC64_DTPREL64:
6244 case R_PPC64_ADDR64:
6245 case R_PPC64_REL30:
6246 case R_PPC64_REL32:
6247 case R_PPC64_REL64:
6248 case R_PPC64_ADDR14:
6249 case R_PPC64_ADDR14_BRNTAKEN:
6250 case R_PPC64_ADDR14_BRTAKEN:
6251 case R_PPC64_ADDR16:
6252 case R_PPC64_ADDR16_DS:
6253 case R_PPC64_ADDR16_HA:
6254 case R_PPC64_ADDR16_HI:
6255 case R_PPC64_ADDR16_HIGHER:
6256 case R_PPC64_ADDR16_HIGHERA:
6257 case R_PPC64_ADDR16_HIGHEST:
6258 case R_PPC64_ADDR16_HIGHESTA:
6259 case R_PPC64_ADDR16_LO:
6260 case R_PPC64_ADDR16_LO_DS:
6261 case R_PPC64_ADDR24:
6262 case R_PPC64_ADDR32:
6263 case R_PPC64_UADDR16:
6264 case R_PPC64_UADDR32:
6265 case R_PPC64_UADDR64:
6266 case R_PPC64_TOC:
6267 break;
6268 }
6269
6270 if (local_syms != NULL)
6271 {
6272 unsigned long r_symndx;
6273 Elf_Internal_Sym *sym;
6274 bfd *ibfd = sec->owner;
6275
6276 r_symndx = ELF64_R_SYM (r_info);
6277 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6278 return FALSE;
6279 }
6280
6281 if ((info->shared
6282 && (MUST_BE_DYN_RELOC (r_type)
6283 || (h != NULL
6284 && (!info->symbolic
6285 || h->root.type == bfd_link_hash_defweak
6286 || !h->def_regular))))
6287 || (ELIMINATE_COPY_RELOCS
6288 && !info->shared
6289 && h != NULL
6290 && (h->root.type == bfd_link_hash_defweak
6291 || !h->def_regular)))
6292 ;
6293 else
6294 return TRUE;
6295
6296 if (h != NULL)
6297 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6298 else
6299 {
6300 if (sym_sec != NULL)
6301 {
6302 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6303 pp = (struct ppc_dyn_relocs **) vpp;
6304 }
6305 else
6306 {
6307 void *vpp = &elf_section_data (sec)->local_dynrel;
6308 pp = (struct ppc_dyn_relocs **) vpp;
6309 }
6310
6311 /* elf_gc_sweep may have already removed all dyn relocs associated
6312 with local syms for a given section. Don't report a dynreloc
6313 miscount. */
6314 if (*pp == NULL)
6315 return TRUE;
6316 }
6317
6318 while ((p = *pp) != NULL)
6319 {
6320 if (p->sec == sec)
6321 {
6322 if (!MUST_BE_DYN_RELOC (r_type))
6323 p->pc_count -= 1;
6324 p->count -= 1;
6325 if (p->count == 0)
6326 *pp = p->next;
6327 return TRUE;
6328 }
6329 pp = &p->next;
6330 }
6331
6332 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6333 sec->owner, sec);
6334 bfd_set_error (bfd_error_bad_value);
6335 return FALSE;
6336 }
6337
6338 /* Remove unused Official Procedure Descriptor entries. Currently we
6339 only remove those associated with functions in discarded link-once
6340 sections, or weakly defined functions that have been overridden. It
6341 would be possible to remove many more entries for statically linked
6342 applications. */
6343
6344 bfd_boolean
6345 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6346 bfd_boolean no_opd_opt,
6347 bfd_boolean non_overlapping)
6348 {
6349 bfd *ibfd;
6350 bfd_boolean some_edited = FALSE;
6351 asection *need_pad = NULL;
6352
6353 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6354 {
6355 asection *sec;
6356 Elf_Internal_Rela *relstart, *rel, *relend;
6357 Elf_Internal_Shdr *symtab_hdr;
6358 Elf_Internal_Sym *local_syms;
6359 struct elf_link_hash_entry **sym_hashes;
6360 bfd_vma offset;
6361 bfd_size_type amt;
6362 long *opd_adjust;
6363 bfd_boolean need_edit, add_aux_fields;
6364 bfd_size_type cnt_16b = 0;
6365
6366 sec = bfd_get_section_by_name (ibfd, ".opd");
6367 if (sec == NULL || sec->size == 0)
6368 continue;
6369
6370 amt = sec->size * sizeof (long) / 8;
6371 opd_adjust = get_opd_info (sec);
6372 if (opd_adjust == NULL)
6373 {
6374 /* check_relocs hasn't been called. Must be a ld -r link
6375 or --just-symbols object. */
6376 opd_adjust = bfd_alloc (obfd, amt);
6377 if (opd_adjust == NULL)
6378 return FALSE;
6379 ppc64_elf_section_data (sec)->u.opd_adjust = opd_adjust;
6380 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
6381 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6382 }
6383 memset (opd_adjust, 0, amt);
6384
6385 if (no_opd_opt)
6386 continue;
6387
6388 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6389 continue;
6390
6391 if (sec->output_section == bfd_abs_section_ptr)
6392 continue;
6393
6394 /* Look through the section relocs. */
6395 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6396 continue;
6397
6398 local_syms = NULL;
6399 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6400 sym_hashes = elf_sym_hashes (ibfd);
6401
6402 /* Read the relocations. */
6403 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6404 info->keep_memory);
6405 if (relstart == NULL)
6406 return FALSE;
6407
6408 /* First run through the relocs to check they are sane, and to
6409 determine whether we need to edit this opd section. */
6410 need_edit = FALSE;
6411 need_pad = sec;
6412 offset = 0;
6413 relend = relstart + sec->reloc_count;
6414 for (rel = relstart; rel < relend; )
6415 {
6416 enum elf_ppc64_reloc_type r_type;
6417 unsigned long r_symndx;
6418 asection *sym_sec;
6419 struct elf_link_hash_entry *h;
6420 Elf_Internal_Sym *sym;
6421
6422 /* .opd contains a regular array of 16 or 24 byte entries. We're
6423 only interested in the reloc pointing to a function entry
6424 point. */
6425 if (rel->r_offset != offset
6426 || rel + 1 >= relend
6427 || (rel + 1)->r_offset != offset + 8)
6428 {
6429 /* If someone messes with .opd alignment then after a
6430 "ld -r" we might have padding in the middle of .opd.
6431 Also, there's nothing to prevent someone putting
6432 something silly in .opd with the assembler. No .opd
6433 optimization for them! */
6434 broken_opd:
6435 (*_bfd_error_handler)
6436 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6437 need_edit = FALSE;
6438 break;
6439 }
6440
6441 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6442 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6443 {
6444 (*_bfd_error_handler)
6445 (_("%B: unexpected reloc type %u in .opd section"),
6446 ibfd, r_type);
6447 need_edit = FALSE;
6448 break;
6449 }
6450
6451 r_symndx = ELF64_R_SYM (rel->r_info);
6452 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6453 r_symndx, ibfd))
6454 goto error_ret;
6455
6456 if (sym_sec == NULL || sym_sec->owner == NULL)
6457 {
6458 const char *sym_name;
6459 if (h != NULL)
6460 sym_name = h->root.root.string;
6461 else
6462 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6463 sym_sec);
6464
6465 (*_bfd_error_handler)
6466 (_("%B: undefined sym `%s' in .opd section"),
6467 ibfd, sym_name);
6468 need_edit = FALSE;
6469 break;
6470 }
6471
6472 /* opd entries are always for functions defined in the
6473 current input bfd. If the symbol isn't defined in the
6474 input bfd, then we won't be using the function in this
6475 bfd; It must be defined in a linkonce section in another
6476 bfd, or is weak. It's also possible that we are
6477 discarding the function due to a linker script /DISCARD/,
6478 which we test for via the output_section. */
6479 if (sym_sec->owner != ibfd
6480 || sym_sec->output_section == bfd_abs_section_ptr)
6481 need_edit = TRUE;
6482
6483 rel += 2;
6484 if (rel == relend
6485 || (rel + 1 == relend && rel->r_offset == offset + 16))
6486 {
6487 if (sec->size == offset + 24)
6488 {
6489 need_pad = NULL;
6490 break;
6491 }
6492 if (rel == relend && sec->size == offset + 16)
6493 {
6494 cnt_16b++;
6495 break;
6496 }
6497 goto broken_opd;
6498 }
6499
6500 if (rel->r_offset == offset + 24)
6501 offset += 24;
6502 else if (rel->r_offset != offset + 16)
6503 goto broken_opd;
6504 else if (rel + 1 < relend
6505 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6506 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6507 {
6508 offset += 16;
6509 cnt_16b++;
6510 }
6511 else if (rel + 2 < relend
6512 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6513 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6514 {
6515 offset += 24;
6516 rel += 1;
6517 }
6518 else
6519 goto broken_opd;
6520 }
6521
6522 add_aux_fields = non_overlapping && cnt_16b > 0;
6523
6524 if (need_edit || add_aux_fields)
6525 {
6526 Elf_Internal_Rela *write_rel;
6527 bfd_byte *rptr, *wptr;
6528 bfd_byte *new_contents = NULL;
6529 bfd_boolean skip;
6530 long opd_ent_size;
6531
6532 /* This seems a waste of time as input .opd sections are all
6533 zeros as generated by gcc, but I suppose there's no reason
6534 this will always be so. We might start putting something in
6535 the third word of .opd entries. */
6536 if ((sec->flags & SEC_IN_MEMORY) == 0)
6537 {
6538 bfd_byte *loc;
6539 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6540 {
6541 if (loc != NULL)
6542 free (loc);
6543 error_ret:
6544 if (local_syms != NULL
6545 && symtab_hdr->contents != (unsigned char *) local_syms)
6546 free (local_syms);
6547 if (elf_section_data (sec)->relocs != relstart)
6548 free (relstart);
6549 return FALSE;
6550 }
6551 sec->contents = loc;
6552 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6553 }
6554
6555 elf_section_data (sec)->relocs = relstart;
6556
6557 new_contents = sec->contents;
6558 if (add_aux_fields)
6559 {
6560 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6561 if (new_contents == NULL)
6562 return FALSE;
6563 need_pad = FALSE;
6564 }
6565 wptr = new_contents;
6566 rptr = sec->contents;
6567
6568 write_rel = relstart;
6569 skip = FALSE;
6570 offset = 0;
6571 opd_ent_size = 0;
6572 for (rel = relstart; rel < relend; rel++)
6573 {
6574 unsigned long r_symndx;
6575 asection *sym_sec;
6576 struct elf_link_hash_entry *h;
6577 Elf_Internal_Sym *sym;
6578
6579 r_symndx = ELF64_R_SYM (rel->r_info);
6580 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6581 r_symndx, ibfd))
6582 goto error_ret;
6583
6584 if (rel->r_offset == offset)
6585 {
6586 struct ppc_link_hash_entry *fdh = NULL;
6587
6588 /* See if the .opd entry is full 24 byte or
6589 16 byte (with fd_aux entry overlapped with next
6590 fd_func). */
6591 opd_ent_size = 24;
6592 if ((rel + 2 == relend && sec->size == offset + 16)
6593 || (rel + 3 < relend
6594 && rel[2].r_offset == offset + 16
6595 && rel[3].r_offset == offset + 24
6596 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6597 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6598 opd_ent_size = 16;
6599
6600 if (h != NULL
6601 && h->root.root.string[0] == '.')
6602 {
6603 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6604 ppc_hash_table (info));
6605 if (fdh != NULL
6606 && fdh->elf.root.type != bfd_link_hash_defined
6607 && fdh->elf.root.type != bfd_link_hash_defweak)
6608 fdh = NULL;
6609 }
6610
6611 skip = (sym_sec->owner != ibfd
6612 || sym_sec->output_section == bfd_abs_section_ptr);
6613 if (skip)
6614 {
6615 if (fdh != NULL && sym_sec->owner == ibfd)
6616 {
6617 /* Arrange for the function descriptor sym
6618 to be dropped. */
6619 fdh->elf.root.u.def.value = 0;
6620 fdh->elf.root.u.def.section = sym_sec;
6621 }
6622 opd_adjust[rel->r_offset / 8] = -1;
6623 }
6624 else
6625 {
6626 /* We'll be keeping this opd entry. */
6627
6628 if (fdh != NULL)
6629 {
6630 /* Redefine the function descriptor symbol to
6631 this location in the opd section. It is
6632 necessary to update the value here rather
6633 than using an array of adjustments as we do
6634 for local symbols, because various places
6635 in the generic ELF code use the value
6636 stored in u.def.value. */
6637 fdh->elf.root.u.def.value = wptr - new_contents;
6638 fdh->adjust_done = 1;
6639 }
6640
6641 /* Local syms are a bit tricky. We could
6642 tweak them as they can be cached, but
6643 we'd need to look through the local syms
6644 for the function descriptor sym which we
6645 don't have at the moment. So keep an
6646 array of adjustments. */
6647 opd_adjust[rel->r_offset / 8]
6648 = (wptr - new_contents) - (rptr - sec->contents);
6649
6650 if (wptr != rptr)
6651 memcpy (wptr, rptr, opd_ent_size);
6652 wptr += opd_ent_size;
6653 if (add_aux_fields && opd_ent_size == 16)
6654 {
6655 memset (wptr, '\0', 8);
6656 wptr += 8;
6657 }
6658 }
6659 rptr += opd_ent_size;
6660 offset += opd_ent_size;
6661 }
6662
6663 if (skip)
6664 {
6665 if (!NO_OPD_RELOCS
6666 && !info->relocatable
6667 && !dec_dynrel_count (rel->r_info, sec, info,
6668 NULL, h, sym_sec))
6669 goto error_ret;
6670 }
6671 else
6672 {
6673 /* We need to adjust any reloc offsets to point to the
6674 new opd entries. While we're at it, we may as well
6675 remove redundant relocs. */
6676 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6677 if (write_rel != rel)
6678 memcpy (write_rel, rel, sizeof (*rel));
6679 ++write_rel;
6680 }
6681 }
6682
6683 sec->size = wptr - new_contents;
6684 sec->reloc_count = write_rel - relstart;
6685 if (add_aux_fields)
6686 {
6687 free (sec->contents);
6688 sec->contents = new_contents;
6689 }
6690
6691 /* Fudge the header size too, as this is used later in
6692 elf_bfd_final_link if we are emitting relocs. */
6693 elf_section_data (sec)->rel_hdr.sh_size
6694 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6695 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6696 some_edited = TRUE;
6697 }
6698 else if (elf_section_data (sec)->relocs != relstart)
6699 free (relstart);
6700
6701 if (local_syms != NULL
6702 && symtab_hdr->contents != (unsigned char *) local_syms)
6703 {
6704 if (!info->keep_memory)
6705 free (local_syms);
6706 else
6707 symtab_hdr->contents = (unsigned char *) local_syms;
6708 }
6709 }
6710
6711 if (some_edited)
6712 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6713
6714 /* If we are doing a final link and the last .opd entry is just 16 byte
6715 long, add a 8 byte padding after it. */
6716 if (need_pad != NULL && !info->relocatable)
6717 {
6718 bfd_byte *p;
6719
6720 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6721 {
6722 BFD_ASSERT (need_pad->size > 0);
6723
6724 p = bfd_malloc (need_pad->size + 8);
6725 if (p == NULL)
6726 return FALSE;
6727
6728 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6729 p, 0, need_pad->size))
6730 return FALSE;
6731
6732 need_pad->contents = p;
6733 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6734 }
6735 else
6736 {
6737 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6738 if (p == NULL)
6739 return FALSE;
6740
6741 need_pad->contents = p;
6742 }
6743
6744 memset (need_pad->contents + need_pad->size, 0, 8);
6745 need_pad->size += 8;
6746 }
6747
6748 return TRUE;
6749 }
6750
6751 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6752
6753 asection *
6754 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6755 {
6756 struct ppc_link_hash_table *htab;
6757
6758 htab = ppc_hash_table (info);
6759 if (htab->tls_get_addr != NULL)
6760 {
6761 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6762
6763 while (h->elf.root.type == bfd_link_hash_indirect
6764 || h->elf.root.type == bfd_link_hash_warning)
6765 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6766
6767 htab->tls_get_addr = h;
6768
6769 if (htab->tls_get_addr_fd == NULL
6770 && h->oh != NULL
6771 && h->oh->is_func_descriptor
6772 && (h->oh->elf.root.type == bfd_link_hash_defined
6773 || h->oh->elf.root.type == bfd_link_hash_defweak))
6774 htab->tls_get_addr_fd = h->oh;
6775 }
6776
6777 if (htab->tls_get_addr_fd != NULL)
6778 {
6779 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6780
6781 while (h->elf.root.type == bfd_link_hash_indirect
6782 || h->elf.root.type == bfd_link_hash_warning)
6783 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6784
6785 htab->tls_get_addr_fd = h;
6786 }
6787
6788 return _bfd_elf_tls_setup (obfd, info);
6789 }
6790
6791 /* Run through all the TLS relocs looking for optimization
6792 opportunities. The linker has been hacked (see ppc64elf.em) to do
6793 a preliminary section layout so that we know the TLS segment
6794 offsets. We can't optimize earlier because some optimizations need
6795 to know the tp offset, and we need to optimize before allocating
6796 dynamic relocations. */
6797
6798 bfd_boolean
6799 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6800 {
6801 bfd *ibfd;
6802 asection *sec;
6803 struct ppc_link_hash_table *htab;
6804
6805 if (info->relocatable || info->shared)
6806 return TRUE;
6807
6808 htab = ppc_hash_table (info);
6809 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6810 {
6811 Elf_Internal_Sym *locsyms = NULL;
6812 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6813 unsigned char *toc_ref = NULL;
6814
6815 /* Look at all the sections for this file, with TOC last. */
6816 for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next
6817 : ibfd->sections);
6818 sec != NULL;
6819 sec = (sec == toc ? NULL
6820 : sec->next == NULL ? toc
6821 : sec->next == toc && toc->next ? toc->next
6822 : sec->next))
6823 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6824 {
6825 Elf_Internal_Rela *relstart, *rel, *relend;
6826 int expecting_tls_get_addr;
6827 long toc_ref_index = 0;
6828
6829 /* Read the relocations. */
6830 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6831 info->keep_memory);
6832 if (relstart == NULL)
6833 return FALSE;
6834
6835 expecting_tls_get_addr = 0;
6836 relend = relstart + sec->reloc_count;
6837 for (rel = relstart; rel < relend; rel++)
6838 {
6839 enum elf_ppc64_reloc_type r_type;
6840 unsigned long r_symndx;
6841 struct elf_link_hash_entry *h;
6842 Elf_Internal_Sym *sym;
6843 asection *sym_sec;
6844 char *tls_mask;
6845 char tls_set, tls_clear, tls_type = 0;
6846 bfd_vma value;
6847 bfd_boolean ok_tprel, is_local;
6848
6849 r_symndx = ELF64_R_SYM (rel->r_info);
6850 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6851 r_symndx, ibfd))
6852 {
6853 err_free_rel:
6854 if (elf_section_data (sec)->relocs != relstart)
6855 free (relstart);
6856 if (toc_ref != NULL)
6857 free (toc_ref);
6858 if (locsyms != NULL
6859 && (elf_tdata (ibfd)->symtab_hdr.contents
6860 != (unsigned char *) locsyms))
6861 free (locsyms);
6862 return FALSE;
6863 }
6864
6865 if (h != NULL)
6866 {
6867 if (h->root.type != bfd_link_hash_defined
6868 && h->root.type != bfd_link_hash_defweak)
6869 continue;
6870 value = h->root.u.def.value;
6871 }
6872 else
6873 /* Symbols referenced by TLS relocs must be of type
6874 STT_TLS. So no need for .opd local sym adjust. */
6875 value = sym->st_value;
6876
6877 ok_tprel = FALSE;
6878 is_local = FALSE;
6879 if (h == NULL
6880 || !h->def_dynamic)
6881 {
6882 is_local = TRUE;
6883 value += sym_sec->output_offset;
6884 value += sym_sec->output_section->vma;
6885 value -= htab->elf.tls_sec->vma;
6886 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6887 < (bfd_vma) 1 << 32);
6888 }
6889
6890 r_type = ELF64_R_TYPE (rel->r_info);
6891 switch (r_type)
6892 {
6893 case R_PPC64_GOT_TLSLD16:
6894 case R_PPC64_GOT_TLSLD16_LO:
6895 case R_PPC64_GOT_TLSLD16_HI:
6896 case R_PPC64_GOT_TLSLD16_HA:
6897 /* These relocs should never be against a symbol
6898 defined in a shared lib. Leave them alone if
6899 that turns out to be the case. */
6900 ppc64_tlsld_got (ibfd)->refcount -= 1;
6901 if (!is_local)
6902 continue;
6903
6904 /* LD -> LE */
6905 tls_set = 0;
6906 tls_clear = TLS_LD;
6907 tls_type = TLS_TLS | TLS_LD;
6908 expecting_tls_get_addr = 1;
6909 break;
6910
6911 case R_PPC64_GOT_TLSGD16:
6912 case R_PPC64_GOT_TLSGD16_LO:
6913 case R_PPC64_GOT_TLSGD16_HI:
6914 case R_PPC64_GOT_TLSGD16_HA:
6915 if (ok_tprel)
6916 /* GD -> LE */
6917 tls_set = 0;
6918 else
6919 /* GD -> IE */
6920 tls_set = TLS_TLS | TLS_TPRELGD;
6921 tls_clear = TLS_GD;
6922 tls_type = TLS_TLS | TLS_GD;
6923 expecting_tls_get_addr = 1;
6924 break;
6925
6926 case R_PPC64_GOT_TPREL16_DS:
6927 case R_PPC64_GOT_TPREL16_LO_DS:
6928 case R_PPC64_GOT_TPREL16_HI:
6929 case R_PPC64_GOT_TPREL16_HA:
6930 expecting_tls_get_addr = 0;
6931 if (ok_tprel)
6932 {
6933 /* IE -> LE */
6934 tls_set = 0;
6935 tls_clear = TLS_TPREL;
6936 tls_type = TLS_TLS | TLS_TPREL;
6937 break;
6938 }
6939 else
6940 continue;
6941
6942 case R_PPC64_REL14:
6943 case R_PPC64_REL14_BRTAKEN:
6944 case R_PPC64_REL14_BRNTAKEN:
6945 case R_PPC64_REL24:
6946 if (h != NULL
6947 && (h == &htab->tls_get_addr->elf
6948 || h == &htab->tls_get_addr_fd->elf))
6949 {
6950 if (!expecting_tls_get_addr
6951 && rel != relstart
6952 && ((ELF64_R_TYPE (rel[-1].r_info)
6953 == R_PPC64_TOC16)
6954 || (ELF64_R_TYPE (rel[-1].r_info)
6955 == R_PPC64_TOC16_LO)))
6956 {
6957 /* Check for toc tls entries. */
6958 char *toc_tls;
6959 int retval;
6960
6961 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6962 rel - 1, ibfd);
6963 if (retval == 0)
6964 goto err_free_rel;
6965 if (retval > 1 && toc_tls != NULL)
6966 {
6967 expecting_tls_get_addr = 1;
6968 if (toc_ref != NULL)
6969 toc_ref[toc_ref_index] = 1;
6970 }
6971 }
6972
6973 if (expecting_tls_get_addr)
6974 {
6975 struct plt_entry *ent;
6976 for (ent = h->plt.plist; ent; ent = ent->next)
6977 if (ent->addend == 0)
6978 {
6979 if (ent->plt.refcount > 0)
6980 ent->plt.refcount -= 1;
6981 break;
6982 }
6983 }
6984 }
6985 expecting_tls_get_addr = 0;
6986 continue;
6987
6988 case R_PPC64_TOC16:
6989 case R_PPC64_TOC16_LO:
6990 case R_PPC64_TLS:
6991 expecting_tls_get_addr = 0;
6992 if (sym_sec == toc && toc != NULL)
6993 {
6994 /* Mark this toc entry as referenced by a TLS
6995 code sequence. We can do that now in the
6996 case of R_PPC64_TLS, and after checking for
6997 tls_get_addr for the TOC16 relocs. */
6998 if (toc_ref == NULL)
6999 {
7000 toc_ref = bfd_zmalloc (toc->size / 8);
7001 if (toc_ref == NULL)
7002 goto err_free_rel;
7003 }
7004 if (h != NULL)
7005 value = h->root.u.def.value;
7006 else
7007 value = sym->st_value;
7008 value += rel->r_addend;
7009 BFD_ASSERT (value < toc->size && value % 8 == 0);
7010 toc_ref_index = value / 8;
7011 if (r_type == R_PPC64_TLS)
7012 toc_ref[toc_ref_index] = 1;
7013 }
7014 continue;
7015
7016 case R_PPC64_TPREL64:
7017 expecting_tls_get_addr = 0;
7018 if (sec != toc
7019 || toc_ref == NULL
7020 || !toc_ref[rel->r_offset / 8])
7021 continue;
7022 if (ok_tprel)
7023 {
7024 /* IE -> LE */
7025 tls_set = TLS_EXPLICIT;
7026 tls_clear = TLS_TPREL;
7027 break;
7028 }
7029 else
7030 continue;
7031
7032 case R_PPC64_DTPMOD64:
7033 expecting_tls_get_addr = 0;
7034 if (sec != toc
7035 || toc_ref == NULL
7036 || !toc_ref[rel->r_offset / 8])
7037 continue;
7038 if (rel + 1 < relend
7039 && (rel[1].r_info
7040 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7041 && rel[1].r_offset == rel->r_offset + 8)
7042 {
7043 if (ok_tprel)
7044 /* GD -> LE */
7045 tls_set = TLS_EXPLICIT | TLS_GD;
7046 else
7047 /* GD -> IE */
7048 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7049 tls_clear = TLS_GD;
7050 }
7051 else
7052 {
7053 if (!is_local)
7054 continue;
7055
7056 /* LD -> LE */
7057 tls_set = TLS_EXPLICIT;
7058 tls_clear = TLS_LD;
7059 }
7060 break;
7061
7062 default:
7063 expecting_tls_get_addr = 0;
7064 continue;
7065 }
7066
7067 if ((tls_set & TLS_EXPLICIT) == 0)
7068 {
7069 struct got_entry *ent;
7070
7071 /* Adjust got entry for this reloc. */
7072 if (h != NULL)
7073 ent = h->got.glist;
7074 else
7075 ent = elf_local_got_ents (ibfd)[r_symndx];
7076
7077 for (; ent != NULL; ent = ent->next)
7078 if (ent->addend == rel->r_addend
7079 && ent->owner == ibfd
7080 && ent->tls_type == tls_type)
7081 break;
7082 if (ent == NULL)
7083 abort ();
7084
7085 if (tls_set == 0)
7086 {
7087 /* We managed to get rid of a got entry. */
7088 if (ent->got.refcount > 0)
7089 ent->got.refcount -= 1;
7090 }
7091 }
7092 else
7093 {
7094 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7095 we'll lose one or two dyn relocs. */
7096 if (!dec_dynrel_count (rel->r_info, sec, info,
7097 NULL, h, sym_sec))
7098 return FALSE;
7099
7100 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7101 {
7102 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7103 NULL, h, sym_sec))
7104 return FALSE;
7105 }
7106 }
7107
7108 *tls_mask |= tls_set;
7109 *tls_mask &= ~tls_clear;
7110 }
7111
7112 if (elf_section_data (sec)->relocs != relstart)
7113 free (relstart);
7114 }
7115
7116 if (toc_ref != NULL)
7117 free (toc_ref);
7118
7119 if (locsyms != NULL
7120 && (elf_tdata (ibfd)->symtab_hdr.contents
7121 != (unsigned char *) locsyms))
7122 {
7123 if (!info->keep_memory)
7124 free (locsyms);
7125 else
7126 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7127 }
7128 }
7129 return TRUE;
7130 }
7131
7132 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7133 the values of any global symbols in a toc section that has been
7134 edited. Globals in toc sections should be a rarity, so this function
7135 sets a flag if any are found in toc sections other than the one just
7136 edited, so that futher hash table traversals can be avoided. */
7137
7138 struct adjust_toc_info
7139 {
7140 asection *toc;
7141 unsigned long *skip;
7142 bfd_boolean global_toc_syms;
7143 };
7144
7145 static bfd_boolean
7146 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7147 {
7148 struct ppc_link_hash_entry *eh;
7149 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7150
7151 if (h->root.type == bfd_link_hash_indirect)
7152 return TRUE;
7153
7154 if (h->root.type == bfd_link_hash_warning)
7155 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7156
7157 if (h->root.type != bfd_link_hash_defined
7158 && h->root.type != bfd_link_hash_defweak)
7159 return TRUE;
7160
7161 eh = (struct ppc_link_hash_entry *) h;
7162 if (eh->adjust_done)
7163 return TRUE;
7164
7165 if (eh->elf.root.u.def.section == toc_inf->toc)
7166 {
7167 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7168 if (skip != (unsigned long) -1)
7169 eh->elf.root.u.def.value -= skip;
7170 else
7171 {
7172 (*_bfd_error_handler)
7173 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7174 eh->elf.root.u.def.section = &bfd_abs_section;
7175 eh->elf.root.u.def.value = 0;
7176 }
7177 eh->adjust_done = 1;
7178 }
7179 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7180 toc_inf->global_toc_syms = TRUE;
7181
7182 return TRUE;
7183 }
7184
7185 /* Examine all relocs referencing .toc sections in order to remove
7186 unused .toc entries. */
7187
7188 bfd_boolean
7189 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7190 {
7191 bfd *ibfd;
7192 struct adjust_toc_info toc_inf;
7193
7194 toc_inf.global_toc_syms = TRUE;
7195 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7196 {
7197 asection *toc, *sec;
7198 Elf_Internal_Shdr *symtab_hdr;
7199 Elf_Internal_Sym *local_syms;
7200 struct elf_link_hash_entry **sym_hashes;
7201 Elf_Internal_Rela *relstart, *rel;
7202 unsigned long *skip, *drop;
7203 unsigned char *used;
7204 unsigned char *keep, last, some_unused;
7205
7206 toc = bfd_get_section_by_name (ibfd, ".toc");
7207 if (toc == NULL
7208 || toc->size == 0
7209 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7210 || elf_discarded_section (toc))
7211 continue;
7212
7213 local_syms = NULL;
7214 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7215 sym_hashes = elf_sym_hashes (ibfd);
7216
7217 /* Look at sections dropped from the final link. */
7218 skip = NULL;
7219 relstart = NULL;
7220 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7221 {
7222 if (sec->reloc_count == 0
7223 || !elf_discarded_section (sec)
7224 || get_opd_info (sec)
7225 || (sec->flags & SEC_ALLOC) == 0
7226 || (sec->flags & SEC_DEBUGGING) != 0)
7227 continue;
7228
7229 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7230 if (relstart == NULL)
7231 goto error_ret;
7232
7233 /* Run through the relocs to see which toc entries might be
7234 unused. */
7235 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7236 {
7237 enum elf_ppc64_reloc_type r_type;
7238 unsigned long r_symndx;
7239 asection *sym_sec;
7240 struct elf_link_hash_entry *h;
7241 Elf_Internal_Sym *sym;
7242 bfd_vma val;
7243
7244 r_type = ELF64_R_TYPE (rel->r_info);
7245 switch (r_type)
7246 {
7247 default:
7248 continue;
7249
7250 case R_PPC64_TOC16:
7251 case R_PPC64_TOC16_LO:
7252 case R_PPC64_TOC16_HI:
7253 case R_PPC64_TOC16_HA:
7254 case R_PPC64_TOC16_DS:
7255 case R_PPC64_TOC16_LO_DS:
7256 break;
7257 }
7258
7259 r_symndx = ELF64_R_SYM (rel->r_info);
7260 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7261 r_symndx, ibfd))
7262 goto error_ret;
7263
7264 if (sym_sec != toc)
7265 continue;
7266
7267 if (h != NULL)
7268 val = h->root.u.def.value;
7269 else
7270 val = sym->st_value;
7271 val += rel->r_addend;
7272
7273 if (val >= toc->size)
7274 continue;
7275
7276 /* Anything in the toc ought to be aligned to 8 bytes.
7277 If not, don't mark as unused. */
7278 if (val & 7)
7279 continue;
7280
7281 if (skip == NULL)
7282 {
7283 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7284 if (skip == NULL)
7285 goto error_ret;
7286 }
7287
7288 skip[val >> 3] = 1;
7289 }
7290
7291 if (elf_section_data (sec)->relocs != relstart)
7292 free (relstart);
7293 }
7294
7295 if (skip == NULL)
7296 continue;
7297
7298 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7299 if (used == NULL)
7300 {
7301 error_ret:
7302 if (local_syms != NULL
7303 && symtab_hdr->contents != (unsigned char *) local_syms)
7304 free (local_syms);
7305 if (sec != NULL
7306 && relstart != NULL
7307 && elf_section_data (sec)->relocs != relstart)
7308 free (relstart);
7309 if (skip != NULL)
7310 free (skip);
7311 return FALSE;
7312 }
7313
7314 /* Now check all kept sections that might reference the toc.
7315 Check the toc itself last. */
7316 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7317 : ibfd->sections);
7318 sec != NULL;
7319 sec = (sec == toc ? NULL
7320 : sec->next == NULL ? toc
7321 : sec->next == toc && toc->next ? toc->next
7322 : sec->next))
7323 {
7324 int repeat;
7325
7326 if (sec->reloc_count == 0
7327 || elf_discarded_section (sec)
7328 || get_opd_info (sec)
7329 || (sec->flags & SEC_ALLOC) == 0
7330 || (sec->flags & SEC_DEBUGGING) != 0)
7331 continue;
7332
7333 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7334 if (relstart == NULL)
7335 goto error_ret;
7336
7337 /* Mark toc entries referenced as used. */
7338 repeat = 0;
7339 do
7340 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7341 {
7342 enum elf_ppc64_reloc_type r_type;
7343 unsigned long r_symndx;
7344 asection *sym_sec;
7345 struct elf_link_hash_entry *h;
7346 Elf_Internal_Sym *sym;
7347 bfd_vma val;
7348
7349 r_type = ELF64_R_TYPE (rel->r_info);
7350 switch (r_type)
7351 {
7352 case R_PPC64_TOC16:
7353 case R_PPC64_TOC16_LO:
7354 case R_PPC64_TOC16_HI:
7355 case R_PPC64_TOC16_HA:
7356 case R_PPC64_TOC16_DS:
7357 case R_PPC64_TOC16_LO_DS:
7358 /* In case we're taking addresses of toc entries. */
7359 case R_PPC64_ADDR64:
7360 break;
7361
7362 default:
7363 continue;
7364 }
7365
7366 r_symndx = ELF64_R_SYM (rel->r_info);
7367 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7368 r_symndx, ibfd))
7369 {
7370 free (used);
7371 goto error_ret;
7372 }
7373
7374 if (sym_sec != toc)
7375 continue;
7376
7377 if (h != NULL)
7378 val = h->root.u.def.value;
7379 else
7380 val = sym->st_value;
7381 val += rel->r_addend;
7382
7383 if (val >= toc->size)
7384 continue;
7385
7386 /* For the toc section, we only mark as used if
7387 this entry itself isn't unused. */
7388 if (sec == toc
7389 && !used[val >> 3]
7390 && (used[rel->r_offset >> 3]
7391 || !skip[rel->r_offset >> 3]))
7392 /* Do all the relocs again, to catch reference
7393 chains. */
7394 repeat = 1;
7395
7396 used[val >> 3] = 1;
7397 }
7398 while (repeat);
7399 }
7400
7401 /* Merge the used and skip arrays. Assume that TOC
7402 doublewords not appearing as either used or unused belong
7403 to to an entry more than one doubleword in size. */
7404 for (drop = skip, keep = used, last = 0, some_unused = 0;
7405 drop < skip + (toc->size + 7) / 8;
7406 ++drop, ++keep)
7407 {
7408 if (*keep)
7409 {
7410 *drop = 0;
7411 last = 0;
7412 }
7413 else if (*drop)
7414 {
7415 some_unused = 1;
7416 last = 1;
7417 }
7418 else
7419 *drop = last;
7420 }
7421
7422 free (used);
7423
7424 if (some_unused)
7425 {
7426 bfd_byte *contents, *src;
7427 unsigned long off;
7428
7429 /* Shuffle the toc contents, and at the same time convert the
7430 skip array from booleans into offsets. */
7431 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7432 goto error_ret;
7433
7434 elf_section_data (toc)->this_hdr.contents = contents;
7435
7436 for (src = contents, off = 0, drop = skip;
7437 src < contents + toc->size;
7438 src += 8, ++drop)
7439 {
7440 if (*drop)
7441 {
7442 *drop = (unsigned long) -1;
7443 off += 8;
7444 }
7445 else if (off != 0)
7446 {
7447 *drop = off;
7448 memcpy (src - off, src, 8);
7449 }
7450 }
7451 toc->rawsize = toc->size;
7452 toc->size = src - contents - off;
7453
7454 if (toc->reloc_count != 0)
7455 {
7456 Elf_Internal_Rela *wrel;
7457 bfd_size_type sz;
7458
7459 /* Read toc relocs. */
7460 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7461 TRUE);
7462 if (relstart == NULL)
7463 goto error_ret;
7464
7465 /* Remove unused toc relocs, and adjust those we keep. */
7466 wrel = relstart;
7467 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7468 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7469 {
7470 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7471 wrel->r_info = rel->r_info;
7472 wrel->r_addend = rel->r_addend;
7473 ++wrel;
7474 }
7475 else if (!dec_dynrel_count (rel->r_info, toc, info,
7476 &local_syms, NULL, NULL))
7477 goto error_ret;
7478
7479 toc->reloc_count = wrel - relstart;
7480 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7481 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7482 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7483 }
7484
7485 /* Adjust addends for relocs against the toc section sym. */
7486 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7487 {
7488 if (sec->reloc_count == 0
7489 || elf_discarded_section (sec))
7490 continue;
7491
7492 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7493 TRUE);
7494 if (relstart == NULL)
7495 goto error_ret;
7496
7497 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7498 {
7499 enum elf_ppc64_reloc_type r_type;
7500 unsigned long r_symndx;
7501 asection *sym_sec;
7502 struct elf_link_hash_entry *h;
7503 Elf_Internal_Sym *sym;
7504
7505 r_type = ELF64_R_TYPE (rel->r_info);
7506 switch (r_type)
7507 {
7508 default:
7509 continue;
7510
7511 case R_PPC64_TOC16:
7512 case R_PPC64_TOC16_LO:
7513 case R_PPC64_TOC16_HI:
7514 case R_PPC64_TOC16_HA:
7515 case R_PPC64_TOC16_DS:
7516 case R_PPC64_TOC16_LO_DS:
7517 case R_PPC64_ADDR64:
7518 break;
7519 }
7520
7521 r_symndx = ELF64_R_SYM (rel->r_info);
7522 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7523 r_symndx, ibfd))
7524 goto error_ret;
7525
7526 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7527 continue;
7528
7529 rel->r_addend -= skip[rel->r_addend >> 3];
7530 }
7531 }
7532
7533 /* We shouldn't have local or global symbols defined in the TOC,
7534 but handle them anyway. */
7535 if (local_syms != NULL)
7536 {
7537 Elf_Internal_Sym *sym;
7538
7539 for (sym = local_syms;
7540 sym < local_syms + symtab_hdr->sh_info;
7541 ++sym)
7542 if (sym->st_shndx != SHN_UNDEF
7543 && (sym->st_shndx < SHN_LORESERVE
7544 || sym->st_shndx > SHN_HIRESERVE)
7545 && sym->st_value != 0
7546 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7547 {
7548 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7549 sym->st_value -= skip[sym->st_value >> 3];
7550 else
7551 {
7552 (*_bfd_error_handler)
7553 (_("%s defined in removed toc entry"),
7554 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7555 NULL));
7556 sym->st_value = 0;
7557 sym->st_shndx = SHN_ABS;
7558 }
7559 symtab_hdr->contents = (unsigned char *) local_syms;
7560 }
7561 }
7562
7563 /* Finally, adjust any global syms defined in the toc. */
7564 if (toc_inf.global_toc_syms)
7565 {
7566 toc_inf.toc = toc;
7567 toc_inf.skip = skip;
7568 toc_inf.global_toc_syms = FALSE;
7569 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7570 &toc_inf);
7571 }
7572 }
7573
7574 if (local_syms != NULL
7575 && symtab_hdr->contents != (unsigned char *) local_syms)
7576 {
7577 if (!info->keep_memory)
7578 free (local_syms);
7579 else
7580 symtab_hdr->contents = (unsigned char *) local_syms;
7581 }
7582 free (skip);
7583 }
7584
7585 return TRUE;
7586 }
7587
7588 /* Allocate space in .plt, .got and associated reloc sections for
7589 dynamic relocs. */
7590
7591 static bfd_boolean
7592 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7593 {
7594 struct bfd_link_info *info;
7595 struct ppc_link_hash_table *htab;
7596 asection *s;
7597 struct ppc_link_hash_entry *eh;
7598 struct ppc_dyn_relocs *p;
7599 struct got_entry *gent;
7600
7601 if (h->root.type == bfd_link_hash_indirect)
7602 return TRUE;
7603
7604 if (h->root.type == bfd_link_hash_warning)
7605 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7606
7607 info = (struct bfd_link_info *) inf;
7608 htab = ppc_hash_table (info);
7609
7610 if (htab->elf.dynamic_sections_created
7611 && h->dynindx != -1
7612 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7613 {
7614 struct plt_entry *pent;
7615 bfd_boolean doneone = FALSE;
7616 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7617 if (pent->plt.refcount > 0)
7618 {
7619 /* If this is the first .plt entry, make room for the special
7620 first entry. */
7621 s = htab->plt;
7622 if (s->size == 0)
7623 s->size += PLT_INITIAL_ENTRY_SIZE;
7624
7625 pent->plt.offset = s->size;
7626
7627 /* Make room for this entry. */
7628 s->size += PLT_ENTRY_SIZE;
7629
7630 /* Make room for the .glink code. */
7631 s = htab->glink;
7632 if (s->size == 0)
7633 s->size += GLINK_CALL_STUB_SIZE;
7634 /* We need bigger stubs past index 32767. */
7635 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7636 s->size += 4;
7637 s->size += 2*4;
7638
7639 /* We also need to make an entry in the .rela.plt section. */
7640 s = htab->relplt;
7641 s->size += sizeof (Elf64_External_Rela);
7642 doneone = TRUE;
7643 }
7644 else
7645 pent->plt.offset = (bfd_vma) -1;
7646 if (!doneone)
7647 {
7648 h->plt.plist = NULL;
7649 h->needs_plt = 0;
7650 }
7651 }
7652 else
7653 {
7654 h->plt.plist = NULL;
7655 h->needs_plt = 0;
7656 }
7657
7658 eh = (struct ppc_link_hash_entry *) h;
7659 /* Run through the TLS GD got entries first if we're changing them
7660 to TPREL. */
7661 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7662 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7663 if (gent->got.refcount > 0
7664 && (gent->tls_type & TLS_GD) != 0)
7665 {
7666 /* This was a GD entry that has been converted to TPREL. If
7667 there happens to be a TPREL entry we can use that one. */
7668 struct got_entry *ent;
7669 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7670 if (ent->got.refcount > 0
7671 && (ent->tls_type & TLS_TPREL) != 0
7672 && ent->addend == gent->addend
7673 && ent->owner == gent->owner)
7674 {
7675 gent->got.refcount = 0;
7676 break;
7677 }
7678
7679 /* If not, then we'll be using our own TPREL entry. */
7680 if (gent->got.refcount != 0)
7681 gent->tls_type = TLS_TLS | TLS_TPREL;
7682 }
7683
7684 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7685 if (gent->got.refcount > 0)
7686 {
7687 bfd_boolean dyn;
7688
7689 /* Make sure this symbol is output as a dynamic symbol.
7690 Undefined weak syms won't yet be marked as dynamic,
7691 nor will all TLS symbols. */
7692 if (h->dynindx == -1
7693 && !h->forced_local)
7694 {
7695 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7696 return FALSE;
7697 }
7698
7699 if ((gent->tls_type & TLS_LD) != 0
7700 && !h->def_dynamic)
7701 {
7702 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7703 continue;
7704 }
7705
7706 s = ppc64_elf_tdata (gent->owner)->got;
7707 gent->got.offset = s->size;
7708 s->size
7709 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7710 dyn = htab->elf.dynamic_sections_created;
7711 if ((info->shared
7712 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7713 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7714 || h->root.type != bfd_link_hash_undefweak))
7715 ppc64_elf_tdata (gent->owner)->relgot->size
7716 += (gent->tls_type & eh->tls_mask & TLS_GD
7717 ? 2 * sizeof (Elf64_External_Rela)
7718 : sizeof (Elf64_External_Rela));
7719 }
7720 else
7721 gent->got.offset = (bfd_vma) -1;
7722
7723 if (eh->dyn_relocs == NULL)
7724 return TRUE;
7725
7726 /* In the shared -Bsymbolic case, discard space allocated for
7727 dynamic pc-relative relocs against symbols which turn out to be
7728 defined in regular objects. For the normal shared case, discard
7729 space for relocs that have become local due to symbol visibility
7730 changes. */
7731
7732 if (info->shared)
7733 {
7734 /* Relocs that use pc_count are those that appear on a call insn,
7735 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7736 generated via assembly. We want calls to protected symbols to
7737 resolve directly to the function rather than going via the plt.
7738 If people want function pointer comparisons to work as expected
7739 then they should avoid writing weird assembly. */
7740 if (SYMBOL_CALLS_LOCAL (info, h))
7741 {
7742 struct ppc_dyn_relocs **pp;
7743
7744 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7745 {
7746 p->count -= p->pc_count;
7747 p->pc_count = 0;
7748 if (p->count == 0)
7749 *pp = p->next;
7750 else
7751 pp = &p->next;
7752 }
7753 }
7754
7755 /* Also discard relocs on undefined weak syms with non-default
7756 visibility. */
7757 if (eh->dyn_relocs != NULL
7758 && h->root.type == bfd_link_hash_undefweak)
7759 {
7760 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7761 eh->dyn_relocs = NULL;
7762
7763 /* Make sure this symbol is output as a dynamic symbol.
7764 Undefined weak syms won't yet be marked as dynamic. */
7765 else if (h->dynindx == -1
7766 && !h->forced_local)
7767 {
7768 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7769 return FALSE;
7770 }
7771 }
7772 }
7773 else if (ELIMINATE_COPY_RELOCS)
7774 {
7775 /* For the non-shared case, discard space for relocs against
7776 symbols which turn out to need copy relocs or are not
7777 dynamic. */
7778
7779 if (!h->non_got_ref
7780 && h->def_dynamic
7781 && !h->def_regular)
7782 {
7783 /* Make sure this symbol is output as a dynamic symbol.
7784 Undefined weak syms won't yet be marked as dynamic. */
7785 if (h->dynindx == -1
7786 && !h->forced_local)
7787 {
7788 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7789 return FALSE;
7790 }
7791
7792 /* If that succeeded, we know we'll be keeping all the
7793 relocs. */
7794 if (h->dynindx != -1)
7795 goto keep;
7796 }
7797
7798 eh->dyn_relocs = NULL;
7799
7800 keep: ;
7801 }
7802
7803 /* Finally, allocate space. */
7804 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7805 {
7806 asection *sreloc = elf_section_data (p->sec)->sreloc;
7807 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7808 }
7809
7810 return TRUE;
7811 }
7812
7813 /* Find any dynamic relocs that apply to read-only sections. */
7814
7815 static bfd_boolean
7816 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7817 {
7818 struct ppc_link_hash_entry *eh;
7819 struct ppc_dyn_relocs *p;
7820
7821 if (h->root.type == bfd_link_hash_warning)
7822 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7823
7824 eh = (struct ppc_link_hash_entry *) h;
7825 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7826 {
7827 asection *s = p->sec->output_section;
7828
7829 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7830 {
7831 struct bfd_link_info *info = inf;
7832
7833 info->flags |= DF_TEXTREL;
7834
7835 /* Not an error, just cut short the traversal. */
7836 return FALSE;
7837 }
7838 }
7839 return TRUE;
7840 }
7841
7842 /* Set the sizes of the dynamic sections. */
7843
7844 static bfd_boolean
7845 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7846 struct bfd_link_info *info)
7847 {
7848 struct ppc_link_hash_table *htab;
7849 bfd *dynobj;
7850 asection *s;
7851 bfd_boolean relocs;
7852 bfd *ibfd;
7853
7854 htab = ppc_hash_table (info);
7855 dynobj = htab->elf.dynobj;
7856 if (dynobj == NULL)
7857 abort ();
7858
7859 if (htab->elf.dynamic_sections_created)
7860 {
7861 /* Set the contents of the .interp section to the interpreter. */
7862 if (info->executable)
7863 {
7864 s = bfd_get_section_by_name (dynobj, ".interp");
7865 if (s == NULL)
7866 abort ();
7867 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7868 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7869 }
7870 }
7871
7872 /* Set up .got offsets for local syms, and space for local dynamic
7873 relocs. */
7874 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7875 {
7876 struct got_entry **lgot_ents;
7877 struct got_entry **end_lgot_ents;
7878 char *lgot_masks;
7879 bfd_size_type locsymcount;
7880 Elf_Internal_Shdr *symtab_hdr;
7881 asection *srel;
7882
7883 if (!is_ppc64_elf_target (ibfd->xvec))
7884 continue;
7885
7886 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7887 {
7888 s = ppc64_elf_tdata (ibfd)->got;
7889 ppc64_tlsld_got (ibfd)->offset = s->size;
7890 s->size += 16;
7891 if (info->shared)
7892 {
7893 srel = ppc64_elf_tdata (ibfd)->relgot;
7894 srel->size += sizeof (Elf64_External_Rela);
7895 }
7896 }
7897 else
7898 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7899
7900 for (s = ibfd->sections; s != NULL; s = s->next)
7901 {
7902 struct ppc_dyn_relocs *p;
7903
7904 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7905 {
7906 if (!bfd_is_abs_section (p->sec)
7907 && bfd_is_abs_section (p->sec->output_section))
7908 {
7909 /* Input section has been discarded, either because
7910 it is a copy of a linkonce section or due to
7911 linker script /DISCARD/, so we'll be discarding
7912 the relocs too. */
7913 }
7914 else if (p->count != 0)
7915 {
7916 srel = elf_section_data (p->sec)->sreloc;
7917 srel->size += p->count * sizeof (Elf64_External_Rela);
7918 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7919 info->flags |= DF_TEXTREL;
7920 }
7921 }
7922 }
7923
7924 lgot_ents = elf_local_got_ents (ibfd);
7925 if (!lgot_ents)
7926 continue;
7927
7928 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7929 locsymcount = symtab_hdr->sh_info;
7930 end_lgot_ents = lgot_ents + locsymcount;
7931 lgot_masks = (char *) end_lgot_ents;
7932 s = ppc64_elf_tdata (ibfd)->got;
7933 srel = ppc64_elf_tdata (ibfd)->relgot;
7934 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7935 {
7936 struct got_entry *ent;
7937
7938 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7939 if (ent->got.refcount > 0)
7940 {
7941 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7942 {
7943 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7944 {
7945 ppc64_tlsld_got (ibfd)->offset = s->size;
7946 s->size += 16;
7947 if (info->shared)
7948 srel->size += sizeof (Elf64_External_Rela);
7949 }
7950 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7951 }
7952 else
7953 {
7954 ent->got.offset = s->size;
7955 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7956 {
7957 s->size += 16;
7958 if (info->shared)
7959 srel->size += 2 * sizeof (Elf64_External_Rela);
7960 }
7961 else
7962 {
7963 s->size += 8;
7964 if (info->shared)
7965 srel->size += sizeof (Elf64_External_Rela);
7966 }
7967 }
7968 }
7969 else
7970 ent->got.offset = (bfd_vma) -1;
7971 }
7972 }
7973
7974 /* Allocate global sym .plt and .got entries, and space for global
7975 sym dynamic relocs. */
7976 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7977
7978 /* We now have determined the sizes of the various dynamic sections.
7979 Allocate memory for them. */
7980 relocs = FALSE;
7981 for (s = dynobj->sections; s != NULL; s = s->next)
7982 {
7983 if ((s->flags & SEC_LINKER_CREATED) == 0)
7984 continue;
7985
7986 if (s == htab->brlt || s == htab->relbrlt)
7987 /* These haven't been allocated yet; don't strip. */
7988 continue;
7989 else if (s == htab->got
7990 || s == htab->plt
7991 || s == htab->glink
7992 || s == htab->dynbss)
7993 {
7994 /* Strip this section if we don't need it; see the
7995 comment below. */
7996 }
7997 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7998 {
7999 if (s->size != 0)
8000 {
8001 if (s != htab->relplt)
8002 relocs = TRUE;
8003
8004 /* We use the reloc_count field as a counter if we need
8005 to copy relocs into the output file. */
8006 s->reloc_count = 0;
8007 }
8008 }
8009 else
8010 {
8011 /* It's not one of our sections, so don't allocate space. */
8012 continue;
8013 }
8014
8015 if (s->size == 0)
8016 {
8017 /* If we don't need this section, strip it from the
8018 output file. This is mostly to handle .rela.bss and
8019 .rela.plt. We must create both sections in
8020 create_dynamic_sections, because they must be created
8021 before the linker maps input sections to output
8022 sections. The linker does that before
8023 adjust_dynamic_symbol is called, and it is that
8024 function which decides whether anything needs to go
8025 into these sections. */
8026 s->flags |= SEC_EXCLUDE;
8027 continue;
8028 }
8029
8030 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8031 continue;
8032
8033 /* Allocate memory for the section contents. We use bfd_zalloc
8034 here in case unused entries are not reclaimed before the
8035 section's contents are written out. This should not happen,
8036 but this way if it does we get a R_PPC64_NONE reloc in .rela
8037 sections instead of garbage.
8038 We also rely on the section contents being zero when writing
8039 the GOT. */
8040 s->contents = bfd_zalloc (dynobj, s->size);
8041 if (s->contents == NULL)
8042 return FALSE;
8043 }
8044
8045 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8046 {
8047 if (!is_ppc64_elf_target (ibfd->xvec))
8048 continue;
8049
8050 s = ppc64_elf_tdata (ibfd)->got;
8051 if (s != NULL && s != htab->got)
8052 {
8053 if (s->size == 0)
8054 s->flags |= SEC_EXCLUDE;
8055 else
8056 {
8057 s->contents = bfd_zalloc (ibfd, s->size);
8058 if (s->contents == NULL)
8059 return FALSE;
8060 }
8061 }
8062 s = ppc64_elf_tdata (ibfd)->relgot;
8063 if (s != NULL)
8064 {
8065 if (s->size == 0)
8066 s->flags |= SEC_EXCLUDE;
8067 else
8068 {
8069 s->contents = bfd_zalloc (ibfd, s->size);
8070 if (s->contents == NULL)
8071 return FALSE;
8072 relocs = TRUE;
8073 s->reloc_count = 0;
8074 }
8075 }
8076 }
8077
8078 if (htab->elf.dynamic_sections_created)
8079 {
8080 /* Add some entries to the .dynamic section. We fill in the
8081 values later, in ppc64_elf_finish_dynamic_sections, but we
8082 must add the entries now so that we get the correct size for
8083 the .dynamic section. The DT_DEBUG entry is filled in by the
8084 dynamic linker and used by the debugger. */
8085 #define add_dynamic_entry(TAG, VAL) \
8086 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8087
8088 if (info->executable)
8089 {
8090 if (!add_dynamic_entry (DT_DEBUG, 0))
8091 return FALSE;
8092 }
8093
8094 if (htab->plt != NULL && htab->plt->size != 0)
8095 {
8096 if (!add_dynamic_entry (DT_PLTGOT, 0)
8097 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8098 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8099 || !add_dynamic_entry (DT_JMPREL, 0)
8100 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8101 return FALSE;
8102 }
8103
8104 if (NO_OPD_RELOCS)
8105 {
8106 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8107 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8108 return FALSE;
8109 }
8110
8111 if (relocs)
8112 {
8113 if (!add_dynamic_entry (DT_RELA, 0)
8114 || !add_dynamic_entry (DT_RELASZ, 0)
8115 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8116 return FALSE;
8117
8118 /* If any dynamic relocs apply to a read-only section,
8119 then we need a DT_TEXTREL entry. */
8120 if ((info->flags & DF_TEXTREL) == 0)
8121 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8122
8123 if ((info->flags & DF_TEXTREL) != 0)
8124 {
8125 if (!add_dynamic_entry (DT_TEXTREL, 0))
8126 return FALSE;
8127 }
8128 }
8129 }
8130 #undef add_dynamic_entry
8131
8132 return TRUE;
8133 }
8134
8135 /* Determine the type of stub needed, if any, for a call. */
8136
8137 static inline enum ppc_stub_type
8138 ppc_type_of_stub (asection *input_sec,
8139 const Elf_Internal_Rela *rel,
8140 struct ppc_link_hash_entry **hash,
8141 bfd_vma destination)
8142 {
8143 struct ppc_link_hash_entry *h = *hash;
8144 bfd_vma location;
8145 bfd_vma branch_offset;
8146 bfd_vma max_branch_offset;
8147 enum elf_ppc64_reloc_type r_type;
8148
8149 if (h != NULL)
8150 {
8151 struct ppc_link_hash_entry *fdh = h;
8152 if (fdh->oh != NULL
8153 && fdh->oh->is_func_descriptor)
8154 fdh = fdh->oh;
8155
8156 if (fdh->elf.dynindx != -1)
8157 {
8158 struct plt_entry *ent;
8159
8160 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8161 if (ent->addend == rel->r_addend
8162 && ent->plt.offset != (bfd_vma) -1)
8163 {
8164 *hash = fdh;
8165 return ppc_stub_plt_call;
8166 }
8167 }
8168
8169 /* Here, we know we don't have a plt entry. If we don't have a
8170 either a defined function descriptor or a defined entry symbol
8171 in a regular object file, then it is pointless trying to make
8172 any other type of stub. */
8173 if (!((fdh->elf.root.type == bfd_link_hash_defined
8174 || fdh->elf.root.type == bfd_link_hash_defweak)
8175 && fdh->elf.root.u.def.section->output_section != NULL)
8176 && !((h->elf.root.type == bfd_link_hash_defined
8177 || h->elf.root.type == bfd_link_hash_defweak)
8178 && h->elf.root.u.def.section->output_section != NULL))
8179 return ppc_stub_none;
8180 }
8181
8182 /* Determine where the call point is. */
8183 location = (input_sec->output_offset
8184 + input_sec->output_section->vma
8185 + rel->r_offset);
8186
8187 branch_offset = destination - location;
8188 r_type = ELF64_R_TYPE (rel->r_info);
8189
8190 /* Determine if a long branch stub is needed. */
8191 max_branch_offset = 1 << 25;
8192 if (r_type != R_PPC64_REL24)
8193 max_branch_offset = 1 << 15;
8194
8195 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8196 /* We need a stub. Figure out whether a long_branch or plt_branch
8197 is needed later. */
8198 return ppc_stub_long_branch;
8199
8200 return ppc_stub_none;
8201 }
8202
8203 /* Build a .plt call stub. */
8204
8205 static inline bfd_byte *
8206 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8207 {
8208 #define PPC_LO(v) ((v) & 0xffff)
8209 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8210 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8211
8212 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8213 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8214 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8215 if (PPC_HA (offset + 8) != PPC_HA (offset))
8216 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8217 offset += 8;
8218 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
8219 if (PPC_HA (offset + 8) != PPC_HA (offset))
8220 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8221 offset += 8;
8222 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8223 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8224 bfd_put_32 (obfd, BCTR, p), p += 4;
8225 return p;
8226 }
8227
8228 static bfd_boolean
8229 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8230 {
8231 struct ppc_stub_hash_entry *stub_entry;
8232 struct ppc_branch_hash_entry *br_entry;
8233 struct bfd_link_info *info;
8234 struct ppc_link_hash_table *htab;
8235 bfd_byte *loc;
8236 bfd_byte *p;
8237 unsigned int indx;
8238 struct plt_entry *ent;
8239 bfd_vma dest, off;
8240 int size;
8241
8242 /* Massage our args to the form they really have. */
8243 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8244 info = in_arg;
8245
8246 htab = ppc_hash_table (info);
8247
8248 /* Make a note of the offset within the stubs for this entry. */
8249 stub_entry->stub_offset = stub_entry->stub_sec->size;
8250 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8251
8252 htab->stub_count[stub_entry->stub_type - 1] += 1;
8253 switch (stub_entry->stub_type)
8254 {
8255 case ppc_stub_long_branch:
8256 case ppc_stub_long_branch_r2off:
8257 /* Branches are relative. This is where we are going to. */
8258 off = dest = (stub_entry->target_value
8259 + stub_entry->target_section->output_offset
8260 + stub_entry->target_section->output_section->vma);
8261
8262 /* And this is where we are coming from. */
8263 off -= (stub_entry->stub_offset
8264 + stub_entry->stub_sec->output_offset
8265 + stub_entry->stub_sec->output_section->vma);
8266
8267 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8268 size = 4;
8269 else
8270 {
8271 bfd_vma r2off;
8272
8273 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8274 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8275 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8276 loc += 4;
8277 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8278 loc += 4;
8279 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8280 loc += 4;
8281 off -= 12;
8282 size = 16;
8283 }
8284 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8285
8286 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8287 {
8288 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8289 stub_entry->root.string);
8290 htab->stub_error = TRUE;
8291 return FALSE;
8292 }
8293
8294 if (info->emitrelocations)
8295 {
8296 Elf_Internal_Rela *relocs, *r;
8297 struct bfd_elf_section_data *elfsec_data;
8298
8299 elfsec_data = elf_section_data (stub_entry->stub_sec);
8300 relocs = elfsec_data->relocs;
8301 if (relocs == NULL)
8302 {
8303 bfd_size_type relsize;
8304 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8305 relocs = bfd_alloc (htab->stub_bfd, relsize);
8306 if (relocs == NULL)
8307 return FALSE;
8308 elfsec_data->relocs = relocs;
8309 elfsec_data->rel_hdr.sh_size = relsize;
8310 elfsec_data->rel_hdr.sh_entsize = 24;
8311 stub_entry->stub_sec->reloc_count = 0;
8312 }
8313 r = relocs + stub_entry->stub_sec->reloc_count;
8314 stub_entry->stub_sec->reloc_count += 1;
8315 r->r_offset = loc - stub_entry->stub_sec->contents;
8316 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8317 r->r_addend = dest;
8318 if (stub_entry->h != NULL)
8319 {
8320 struct elf_link_hash_entry **hashes;
8321 unsigned long symndx;
8322 struct ppc_link_hash_entry *h;
8323
8324 hashes = elf_sym_hashes (htab->stub_bfd);
8325 if (hashes == NULL)
8326 {
8327 bfd_size_type hsize;
8328
8329 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8330 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8331 if (hashes == NULL)
8332 return FALSE;
8333 elf_sym_hashes (htab->stub_bfd) = hashes;
8334 htab->stub_globals = 1;
8335 }
8336 symndx = htab->stub_globals++;
8337 h = stub_entry->h;
8338 hashes[symndx] = &h->elf;
8339 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8340 if (h->oh != NULL && h->oh->is_func)
8341 h = h->oh;
8342 if (h->elf.root.u.def.section != stub_entry->target_section)
8343 /* H is an opd symbol. The addend must be zero. */
8344 r->r_addend = 0;
8345 else
8346 {
8347 off = (h->elf.root.u.def.value
8348 + h->elf.root.u.def.section->output_offset
8349 + h->elf.root.u.def.section->output_section->vma);
8350 r->r_addend -= off;
8351 }
8352 }
8353 }
8354 break;
8355
8356 case ppc_stub_plt_branch:
8357 case ppc_stub_plt_branch_r2off:
8358 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8359 stub_entry->root.string + 9,
8360 FALSE, FALSE);
8361 if (br_entry == NULL)
8362 {
8363 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8364 stub_entry->root.string);
8365 htab->stub_error = TRUE;
8366 return FALSE;
8367 }
8368
8369 off = (stub_entry->target_value
8370 + stub_entry->target_section->output_offset
8371 + stub_entry->target_section->output_section->vma);
8372
8373 bfd_put_64 (htab->brlt->owner, off,
8374 htab->brlt->contents + br_entry->offset);
8375
8376 if (htab->relbrlt != NULL)
8377 {
8378 /* Create a reloc for the branch lookup table entry. */
8379 Elf_Internal_Rela rela;
8380 bfd_byte *rl;
8381
8382 rela.r_offset = (br_entry->offset
8383 + htab->brlt->output_offset
8384 + htab->brlt->output_section->vma);
8385 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8386 rela.r_addend = off;
8387
8388 rl = htab->relbrlt->contents;
8389 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8390 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8391 }
8392 else if (info->emitrelocations)
8393 {
8394 Elf_Internal_Rela *relocs, *r;
8395 struct bfd_elf_section_data *elfsec_data;
8396
8397 elfsec_data = elf_section_data (htab->brlt);
8398 relocs = elfsec_data->relocs;
8399 if (relocs == NULL)
8400 {
8401 bfd_size_type relsize;
8402 relsize = htab->brlt->reloc_count * sizeof (*relocs);
8403 relocs = bfd_alloc (htab->brlt->owner, relsize);
8404 if (relocs == NULL)
8405 return FALSE;
8406 elfsec_data->relocs = relocs;
8407 elfsec_data->rel_hdr.sh_size = relsize;
8408 elfsec_data->rel_hdr.sh_entsize = 24;
8409 htab->brlt->reloc_count = 0;
8410 }
8411 r = relocs + htab->brlt->reloc_count;
8412 htab->brlt->reloc_count += 1;
8413 r->r_offset = (br_entry->offset
8414 + htab->brlt->output_offset
8415 + htab->brlt->output_section->vma);
8416 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8417 r->r_addend = off;
8418 }
8419
8420 off = (br_entry->offset
8421 + htab->brlt->output_offset
8422 + htab->brlt->output_section->vma
8423 - elf_gp (htab->brlt->output_section->owner)
8424 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8425
8426 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8427 {
8428 (*_bfd_error_handler)
8429 (_("linkage table error against `%s'"),
8430 stub_entry->root.string);
8431 bfd_set_error (bfd_error_bad_value);
8432 htab->stub_error = TRUE;
8433 return FALSE;
8434 }
8435
8436 indx = off;
8437 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8438 {
8439 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8440 loc += 4;
8441 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8442 size = 16;
8443 }
8444 else
8445 {
8446 bfd_vma r2off;
8447
8448 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8449 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8450 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8451 loc += 4;
8452 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8453 loc += 4;
8454 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8455 loc += 4;
8456 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8457 loc += 4;
8458 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8459 size = 28;
8460 }
8461 loc += 4;
8462 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8463 loc += 4;
8464 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8465 break;
8466
8467 case ppc_stub_plt_call:
8468 /* Do the best we can for shared libraries built without
8469 exporting ".foo" for each "foo". This can happen when symbol
8470 versioning scripts strip all bar a subset of symbols. */
8471 if (stub_entry->h->oh != NULL
8472 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8473 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8474 {
8475 /* Point the symbol at the stub. There may be multiple stubs,
8476 we don't really care; The main thing is to make this sym
8477 defined somewhere. Maybe defining the symbol in the stub
8478 section is a silly idea. If we didn't do this, htab->top_id
8479 could disappear. */
8480 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8481 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8482 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8483 }
8484
8485 /* Now build the stub. */
8486 off = (bfd_vma) -1;
8487 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8488 if (ent->addend == stub_entry->addend)
8489 {
8490 off = ent->plt.offset;
8491 break;
8492 }
8493 if (off >= (bfd_vma) -2)
8494 abort ();
8495
8496 off &= ~ (bfd_vma) 1;
8497 off += (htab->plt->output_offset
8498 + htab->plt->output_section->vma
8499 - elf_gp (htab->plt->output_section->owner)
8500 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8501
8502 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8503 {
8504 (*_bfd_error_handler)
8505 (_("linkage table error against `%s'"),
8506 stub_entry->h->elf.root.root.string);
8507 bfd_set_error (bfd_error_bad_value);
8508 htab->stub_error = TRUE;
8509 return FALSE;
8510 }
8511
8512 p = build_plt_stub (htab->stub_bfd, loc, off);
8513 size = p - loc;
8514 break;
8515
8516 default:
8517 BFD_FAIL ();
8518 return FALSE;
8519 }
8520
8521 stub_entry->stub_sec->size += size;
8522
8523 if (htab->emit_stub_syms)
8524 {
8525 struct elf_link_hash_entry *h;
8526 size_t len1, len2;
8527 char *name;
8528 const char *const stub_str[] = { "long_branch",
8529 "long_branch_r2off",
8530 "plt_branch",
8531 "plt_branch_r2off",
8532 "plt_call" };
8533
8534 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8535 len2 = strlen (stub_entry->root.string);
8536 name = bfd_malloc (len1 + len2 + 2);
8537 if (name == NULL)
8538 return FALSE;
8539 memcpy (name, stub_entry->root.string, 9);
8540 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8541 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8542 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8543 if (h == NULL)
8544 return FALSE;
8545 if (h->root.type == bfd_link_hash_new)
8546 {
8547 h->root.type = bfd_link_hash_defined;
8548 h->root.u.def.section = stub_entry->stub_sec;
8549 h->root.u.def.value = stub_entry->stub_offset;
8550 h->ref_regular = 1;
8551 h->def_regular = 1;
8552 h->ref_regular_nonweak = 1;
8553 h->forced_local = 1;
8554 h->non_elf = 0;
8555 }
8556 }
8557
8558 return TRUE;
8559 }
8560
8561 /* As above, but don't actually build the stub. Just bump offset so
8562 we know stub section sizes, and select plt_branch stubs where
8563 long_branch stubs won't do. */
8564
8565 static bfd_boolean
8566 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8567 {
8568 struct ppc_stub_hash_entry *stub_entry;
8569 struct bfd_link_info *info;
8570 struct ppc_link_hash_table *htab;
8571 bfd_vma off;
8572 int size;
8573
8574 /* Massage our args to the form they really have. */
8575 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8576 info = in_arg;
8577
8578 htab = ppc_hash_table (info);
8579
8580 if (stub_entry->stub_type == ppc_stub_plt_call)
8581 {
8582 struct plt_entry *ent;
8583 off = (bfd_vma) -1;
8584 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8585 if (ent->addend == stub_entry->addend)
8586 {
8587 off = ent->plt.offset & ~(bfd_vma) 1;
8588 break;
8589 }
8590 if (off >= (bfd_vma) -2)
8591 abort ();
8592 off += (htab->plt->output_offset
8593 + htab->plt->output_section->vma
8594 - elf_gp (htab->plt->output_section->owner)
8595 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8596
8597 size = PLT_CALL_STUB_SIZE;
8598 if (PPC_HA (off + 16) != PPC_HA (off))
8599 size += 4;
8600 }
8601 else
8602 {
8603 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8604 variants. */
8605 off = (stub_entry->target_value
8606 + stub_entry->target_section->output_offset
8607 + stub_entry->target_section->output_section->vma);
8608 off -= (stub_entry->stub_sec->size
8609 + stub_entry->stub_sec->output_offset
8610 + stub_entry->stub_sec->output_section->vma);
8611
8612 /* Reset the stub type from the plt variant in case we now
8613 can reach with a shorter stub. */
8614 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8615 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8616
8617 size = 4;
8618 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8619 {
8620 off -= 12;
8621 size = 16;
8622 }
8623
8624 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8625 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8626 {
8627 struct ppc_branch_hash_entry *br_entry;
8628
8629 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8630 stub_entry->root.string + 9,
8631 TRUE, FALSE);
8632 if (br_entry == NULL)
8633 {
8634 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8635 stub_entry->root.string);
8636 htab->stub_error = TRUE;
8637 return FALSE;
8638 }
8639
8640 if (br_entry->iter != htab->stub_iteration)
8641 {
8642 br_entry->iter = htab->stub_iteration;
8643 br_entry->offset = htab->brlt->size;
8644 htab->brlt->size += 8;
8645
8646 if (htab->relbrlt != NULL)
8647 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8648 else if (info->emitrelocations)
8649 {
8650 htab->brlt->reloc_count += 1;
8651 htab->brlt->flags |= SEC_RELOC;
8652 }
8653 }
8654
8655 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8656 size = 16;
8657 if (stub_entry->stub_type != ppc_stub_plt_branch)
8658 size = 28;
8659 }
8660 else if (info->emitrelocations)
8661 {
8662 stub_entry->stub_sec->reloc_count += 1;
8663 stub_entry->stub_sec->flags |= SEC_RELOC;
8664 }
8665 }
8666
8667 stub_entry->stub_sec->size += size;
8668 return TRUE;
8669 }
8670
8671 /* Set up various things so that we can make a list of input sections
8672 for each output section included in the link. Returns -1 on error,
8673 0 when no stubs will be needed, and 1 on success. */
8674
8675 int
8676 ppc64_elf_setup_section_lists (bfd *output_bfd,
8677 struct bfd_link_info *info,
8678 int no_multi_toc)
8679 {
8680 bfd *input_bfd;
8681 int top_id, top_index, id;
8682 asection *section;
8683 asection **input_list;
8684 bfd_size_type amt;
8685 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8686
8687 htab->no_multi_toc = no_multi_toc;
8688
8689 if (htab->brlt == NULL)
8690 return 0;
8691
8692 /* Find the top input section id. */
8693 for (input_bfd = info->input_bfds, top_id = 3;
8694 input_bfd != NULL;
8695 input_bfd = input_bfd->link_next)
8696 {
8697 for (section = input_bfd->sections;
8698 section != NULL;
8699 section = section->next)
8700 {
8701 if (top_id < section->id)
8702 top_id = section->id;
8703 }
8704 }
8705
8706 htab->top_id = top_id;
8707 amt = sizeof (struct map_stub) * (top_id + 1);
8708 htab->stub_group = bfd_zmalloc (amt);
8709 if (htab->stub_group == NULL)
8710 return -1;
8711
8712 /* Set toc_off for com, und, abs and ind sections. */
8713 for (id = 0; id < 3; id++)
8714 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8715
8716 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8717
8718 /* We can't use output_bfd->section_count here to find the top output
8719 section index as some sections may have been removed, and
8720 strip_excluded_output_sections doesn't renumber the indices. */
8721 for (section = output_bfd->sections, top_index = 0;
8722 section != NULL;
8723 section = section->next)
8724 {
8725 if (top_index < section->index)
8726 top_index = section->index;
8727 }
8728
8729 htab->top_index = top_index;
8730 amt = sizeof (asection *) * (top_index + 1);
8731 input_list = bfd_zmalloc (amt);
8732 htab->input_list = input_list;
8733 if (input_list == NULL)
8734 return -1;
8735
8736 return 1;
8737 }
8738
8739 /* The linker repeatedly calls this function for each TOC input section
8740 and linker generated GOT section. Group input bfds such that the toc
8741 within a group is less than 64k in size. Will break with cute linker
8742 scripts that play games with dot in the output toc section. */
8743
8744 void
8745 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8746 {
8747 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8748
8749 if (!htab->no_multi_toc)
8750 {
8751 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8752 bfd_vma off = addr - htab->toc_curr;
8753
8754 if (off + isec->size > 0x10000)
8755 htab->toc_curr = addr;
8756
8757 elf_gp (isec->owner) = (htab->toc_curr
8758 - elf_gp (isec->output_section->owner)
8759 + TOC_BASE_OFF);
8760 }
8761 }
8762
8763 /* Called after the last call to the above function. */
8764
8765 void
8766 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8767 {
8768 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8769
8770 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8771
8772 /* toc_curr tracks the TOC offset used for code sections below in
8773 ppc64_elf_next_input_section. Start off at 0x8000. */
8774 htab->toc_curr = TOC_BASE_OFF;
8775 }
8776
8777 /* No toc references were found in ISEC. If the code in ISEC makes no
8778 calls, then there's no need to use toc adjusting stubs when branching
8779 into ISEC. Actually, indirect calls from ISEC are OK as they will
8780 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8781 needed, and 2 if a cyclical call-graph was found but no other reason
8782 for a stub was detected. If called from the top level, a return of
8783 2 means the same as a return of 0. */
8784
8785 static int
8786 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8787 {
8788 Elf_Internal_Rela *relstart, *rel;
8789 Elf_Internal_Sym *local_syms;
8790 int ret;
8791 struct ppc_link_hash_table *htab;
8792
8793 /* We know none of our code bearing sections will need toc stubs. */
8794 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8795 return 0;
8796
8797 if (isec->size == 0)
8798 return 0;
8799
8800 if (isec->output_section == NULL)
8801 return 0;
8802
8803 /* Hack for linux kernel. .fixup contains branches, but only back to
8804 the function that hit an exception. */
8805 if (strcmp (isec->name, ".fixup") == 0)
8806 return 0;
8807
8808 if (isec->reloc_count == 0)
8809 return 0;
8810
8811 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8812 info->keep_memory);
8813 if (relstart == NULL)
8814 return -1;
8815
8816 /* Look for branches to outside of this section. */
8817 local_syms = NULL;
8818 ret = 0;
8819 htab = ppc_hash_table (info);
8820 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8821 {
8822 enum elf_ppc64_reloc_type r_type;
8823 unsigned long r_symndx;
8824 struct elf_link_hash_entry *h;
8825 Elf_Internal_Sym *sym;
8826 asection *sym_sec;
8827 long *opd_adjust;
8828 bfd_vma sym_value;
8829 bfd_vma dest;
8830
8831 r_type = ELF64_R_TYPE (rel->r_info);
8832 if (r_type != R_PPC64_REL24
8833 && r_type != R_PPC64_REL14
8834 && r_type != R_PPC64_REL14_BRTAKEN
8835 && r_type != R_PPC64_REL14_BRNTAKEN)
8836 continue;
8837
8838 r_symndx = ELF64_R_SYM (rel->r_info);
8839 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8840 isec->owner))
8841 {
8842 ret = -1;
8843 break;
8844 }
8845
8846 /* Calls to dynamic lib functions go through a plt call stub
8847 that uses r2. Branches to undefined symbols might be a call
8848 using old-style dot symbols that can be satisfied by a plt
8849 call into a new-style dynamic library. */
8850 if (sym_sec == NULL)
8851 {
8852 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8853 if (eh != NULL
8854 && eh->oh != NULL
8855 && eh->oh->elf.plt.plist != NULL)
8856 {
8857 ret = 1;
8858 break;
8859 }
8860
8861 /* Ignore other undefined symbols. */
8862 continue;
8863 }
8864
8865 /* Assume branches to other sections not included in the link need
8866 stubs too, to cover -R and absolute syms. */
8867 if (sym_sec->output_section == NULL)
8868 {
8869 ret = 1;
8870 break;
8871 }
8872
8873 if (h == NULL)
8874 sym_value = sym->st_value;
8875 else
8876 {
8877 if (h->root.type != bfd_link_hash_defined
8878 && h->root.type != bfd_link_hash_defweak)
8879 abort ();
8880 sym_value = h->root.u.def.value;
8881 }
8882 sym_value += rel->r_addend;
8883
8884 /* If this branch reloc uses an opd sym, find the code section. */
8885 opd_adjust = get_opd_info (sym_sec);
8886 if (opd_adjust != NULL)
8887 {
8888 if (h == NULL)
8889 {
8890 long adjust;
8891
8892 adjust = opd_adjust[sym->st_value / 8];
8893 if (adjust == -1)
8894 /* Assume deleted functions won't ever be called. */
8895 continue;
8896 sym_value += adjust;
8897 }
8898
8899 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8900 if (dest == (bfd_vma) -1)
8901 continue;
8902 }
8903 else
8904 dest = (sym_value
8905 + sym_sec->output_offset
8906 + sym_sec->output_section->vma);
8907
8908 /* Ignore branch to self. */
8909 if (sym_sec == isec)
8910 continue;
8911
8912 /* If the called function uses the toc, we need a stub. */
8913 if (sym_sec->has_toc_reloc
8914 || sym_sec->makes_toc_func_call)
8915 {
8916 ret = 1;
8917 break;
8918 }
8919
8920 /* Assume any branch that needs a long branch stub might in fact
8921 need a plt_branch stub. A plt_branch stub uses r2. */
8922 else if (dest - (isec->output_offset
8923 + isec->output_section->vma
8924 + rel->r_offset) + (1 << 25) >= (2 << 25))
8925 {
8926 ret = 1;
8927 break;
8928 }
8929
8930 /* If calling back to a section in the process of being tested, we
8931 can't say for sure that no toc adjusting stubs are needed, so
8932 don't return zero. */
8933 else if (sym_sec->call_check_in_progress)
8934 ret = 2;
8935
8936 /* Branches to another section that itself doesn't have any TOC
8937 references are OK. Recursively call ourselves to check. */
8938 else if (sym_sec->id <= htab->top_id
8939 && htab->stub_group[sym_sec->id].toc_off == 0)
8940 {
8941 int recur;
8942
8943 /* Mark current section as indeterminate, so that other
8944 sections that call back to current won't be marked as
8945 known. */
8946 isec->call_check_in_progress = 1;
8947 recur = toc_adjusting_stub_needed (info, sym_sec);
8948 isec->call_check_in_progress = 0;
8949
8950 if (recur < 0)
8951 {
8952 /* An error. Exit. */
8953 ret = -1;
8954 break;
8955 }
8956 else if (recur <= 1)
8957 {
8958 /* Known result. Mark as checked and set section flag. */
8959 htab->stub_group[sym_sec->id].toc_off = 1;
8960 if (recur != 0)
8961 {
8962 sym_sec->makes_toc_func_call = 1;
8963 ret = 1;
8964 break;
8965 }
8966 }
8967 else
8968 {
8969 /* Unknown result. Continue checking. */
8970 ret = 2;
8971 }
8972 }
8973 }
8974
8975 if (local_syms != NULL
8976 && (elf_tdata (isec->owner)->symtab_hdr.contents
8977 != (unsigned char *) local_syms))
8978 free (local_syms);
8979 if (elf_section_data (isec)->relocs != relstart)
8980 free (relstart);
8981
8982 return ret;
8983 }
8984
8985 /* The linker repeatedly calls this function for each input section,
8986 in the order that input sections are linked into output sections.
8987 Build lists of input sections to determine groupings between which
8988 we may insert linker stubs. */
8989
8990 bfd_boolean
8991 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8992 {
8993 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8994
8995 if ((isec->output_section->flags & SEC_CODE) != 0
8996 && isec->output_section->index <= htab->top_index)
8997 {
8998 asection **list = htab->input_list + isec->output_section->index;
8999 /* Steal the link_sec pointer for our list. */
9000 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9001 /* This happens to make the list in reverse order,
9002 which is what we want. */
9003 PREV_SEC (isec) = *list;
9004 *list = isec;
9005 }
9006
9007 if (htab->multi_toc_needed)
9008 {
9009 /* If a code section has a function that uses the TOC then we need
9010 to use the right TOC (obviously). Also, make sure that .opd gets
9011 the correct TOC value for R_PPC64_TOC relocs that don't have or
9012 can't find their function symbol (shouldn't ever happen now). */
9013 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
9014 {
9015 if (elf_gp (isec->owner) != 0)
9016 htab->toc_curr = elf_gp (isec->owner);
9017 }
9018 else if (htab->stub_group[isec->id].toc_off == 0)
9019 {
9020 int ret = toc_adjusting_stub_needed (info, isec);
9021 if (ret < 0)
9022 return FALSE;
9023 else
9024 isec->makes_toc_func_call = ret & 1;
9025 }
9026 }
9027
9028 /* Functions that don't use the TOC can belong in any TOC group.
9029 Use the last TOC base. This happens to make _init and _fini
9030 pasting work. */
9031 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9032 return TRUE;
9033 }
9034
9035 /* See whether we can group stub sections together. Grouping stub
9036 sections may result in fewer stubs. More importantly, we need to
9037 put all .init* and .fini* stubs at the beginning of the .init or
9038 .fini output sections respectively, because glibc splits the
9039 _init and _fini functions into multiple parts. Putting a stub in
9040 the middle of a function is not a good idea. */
9041
9042 static void
9043 group_sections (struct ppc_link_hash_table *htab,
9044 bfd_size_type stub_group_size,
9045 bfd_boolean stubs_always_before_branch)
9046 {
9047 asection **list;
9048 bfd_size_type stub14_group_size;
9049 bfd_boolean suppress_size_errors;
9050
9051 suppress_size_errors = FALSE;
9052 stub14_group_size = stub_group_size;
9053 if (stub_group_size == 1)
9054 {
9055 /* Default values. */
9056 if (stubs_always_before_branch)
9057 {
9058 stub_group_size = 0x1e00000;
9059 stub14_group_size = 0x7800;
9060 }
9061 else
9062 {
9063 stub_group_size = 0x1c00000;
9064 stub14_group_size = 0x7000;
9065 }
9066 suppress_size_errors = TRUE;
9067 }
9068
9069 list = htab->input_list + htab->top_index;
9070 do
9071 {
9072 asection *tail = *list;
9073 while (tail != NULL)
9074 {
9075 asection *curr;
9076 asection *prev;
9077 bfd_size_type total;
9078 bfd_boolean big_sec;
9079 bfd_vma curr_toc;
9080
9081 curr = tail;
9082 total = tail->size;
9083 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9084 ? stub14_group_size : stub_group_size);
9085 if (big_sec && !suppress_size_errors)
9086 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9087 tail->owner, tail);
9088 curr_toc = htab->stub_group[tail->id].toc_off;
9089
9090 while ((prev = PREV_SEC (curr)) != NULL
9091 && ((total += curr->output_offset - prev->output_offset)
9092 < (ppc64_elf_section_data (prev)->has_14bit_branch
9093 ? stub14_group_size : stub_group_size))
9094 && htab->stub_group[prev->id].toc_off == curr_toc)
9095 curr = prev;
9096
9097 /* OK, the size from the start of CURR to the end is less
9098 than stub_group_size and thus can be handled by one stub
9099 section. (or the tail section is itself larger than
9100 stub_group_size, in which case we may be toast.) We
9101 should really be keeping track of the total size of stubs
9102 added here, as stubs contribute to the final output
9103 section size. That's a little tricky, and this way will
9104 only break if stubs added make the total size more than
9105 2^25, ie. for the default stub_group_size, if stubs total
9106 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9107 do
9108 {
9109 prev = PREV_SEC (tail);
9110 /* Set up this stub group. */
9111 htab->stub_group[tail->id].link_sec = curr;
9112 }
9113 while (tail != curr && (tail = prev) != NULL);
9114
9115 /* But wait, there's more! Input sections up to stub_group_size
9116 bytes before the stub section can be handled by it too.
9117 Don't do this if we have a really large section after the
9118 stubs, as adding more stubs increases the chance that
9119 branches may not reach into the stub section. */
9120 if (!stubs_always_before_branch && !big_sec)
9121 {
9122 total = 0;
9123 while (prev != NULL
9124 && ((total += tail->output_offset - prev->output_offset)
9125 < (ppc64_elf_section_data (prev)->has_14bit_branch
9126 ? stub14_group_size : stub_group_size))
9127 && htab->stub_group[prev->id].toc_off == curr_toc)
9128 {
9129 tail = prev;
9130 prev = PREV_SEC (tail);
9131 htab->stub_group[tail->id].link_sec = curr;
9132 }
9133 }
9134 tail = prev;
9135 }
9136 }
9137 while (list-- != htab->input_list);
9138 free (htab->input_list);
9139 #undef PREV_SEC
9140 }
9141
9142 /* Determine and set the size of the stub section for a final link.
9143
9144 The basic idea here is to examine all the relocations looking for
9145 PC-relative calls to a target that is unreachable with a "bl"
9146 instruction. */
9147
9148 bfd_boolean
9149 ppc64_elf_size_stubs (bfd *output_bfd,
9150 struct bfd_link_info *info,
9151 bfd_signed_vma group_size,
9152 asection *(*add_stub_section) (const char *, asection *),
9153 void (*layout_sections_again) (void))
9154 {
9155 bfd_size_type stub_group_size;
9156 bfd_boolean stubs_always_before_branch;
9157 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9158
9159 /* Stash our params away. */
9160 htab->add_stub_section = add_stub_section;
9161 htab->layout_sections_again = layout_sections_again;
9162 stubs_always_before_branch = group_size < 0;
9163 if (group_size < 0)
9164 stub_group_size = -group_size;
9165 else
9166 stub_group_size = group_size;
9167
9168 group_sections (htab, stub_group_size, stubs_always_before_branch);
9169
9170 while (1)
9171 {
9172 bfd *input_bfd;
9173 unsigned int bfd_indx;
9174 asection *stub_sec;
9175
9176 htab->stub_iteration += 1;
9177
9178 for (input_bfd = info->input_bfds, bfd_indx = 0;
9179 input_bfd != NULL;
9180 input_bfd = input_bfd->link_next, bfd_indx++)
9181 {
9182 Elf_Internal_Shdr *symtab_hdr;
9183 asection *section;
9184 Elf_Internal_Sym *local_syms = NULL;
9185
9186 if (!is_ppc64_elf_target (input_bfd->xvec))
9187 continue;
9188
9189 /* We'll need the symbol table in a second. */
9190 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9191 if (symtab_hdr->sh_info == 0)
9192 continue;
9193
9194 /* Walk over each section attached to the input bfd. */
9195 for (section = input_bfd->sections;
9196 section != NULL;
9197 section = section->next)
9198 {
9199 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9200
9201 /* If there aren't any relocs, then there's nothing more
9202 to do. */
9203 if ((section->flags & SEC_RELOC) == 0
9204 || (section->flags & SEC_ALLOC) == 0
9205 || (section->flags & SEC_LOAD) == 0
9206 || (section->flags & SEC_CODE) == 0
9207 || section->reloc_count == 0)
9208 continue;
9209
9210 /* If this section is a link-once section that will be
9211 discarded, then don't create any stubs. */
9212 if (section->output_section == NULL
9213 || section->output_section->owner != output_bfd)
9214 continue;
9215
9216 /* Get the relocs. */
9217 internal_relocs
9218 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9219 info->keep_memory);
9220 if (internal_relocs == NULL)
9221 goto error_ret_free_local;
9222
9223 /* Now examine each relocation. */
9224 irela = internal_relocs;
9225 irelaend = irela + section->reloc_count;
9226 for (; irela < irelaend; irela++)
9227 {
9228 enum elf_ppc64_reloc_type r_type;
9229 unsigned int r_indx;
9230 enum ppc_stub_type stub_type;
9231 struct ppc_stub_hash_entry *stub_entry;
9232 asection *sym_sec, *code_sec;
9233 bfd_vma sym_value;
9234 bfd_vma destination;
9235 bfd_boolean ok_dest;
9236 struct ppc_link_hash_entry *hash;
9237 struct ppc_link_hash_entry *fdh;
9238 struct elf_link_hash_entry *h;
9239 Elf_Internal_Sym *sym;
9240 char *stub_name;
9241 const asection *id_sec;
9242 long *opd_adjust;
9243
9244 r_type = ELF64_R_TYPE (irela->r_info);
9245 r_indx = ELF64_R_SYM (irela->r_info);
9246
9247 if (r_type >= R_PPC64_max)
9248 {
9249 bfd_set_error (bfd_error_bad_value);
9250 goto error_ret_free_internal;
9251 }
9252
9253 /* Only look for stubs on branch instructions. */
9254 if (r_type != R_PPC64_REL24
9255 && r_type != R_PPC64_REL14
9256 && r_type != R_PPC64_REL14_BRTAKEN
9257 && r_type != R_PPC64_REL14_BRNTAKEN)
9258 continue;
9259
9260 /* Now determine the call target, its name, value,
9261 section. */
9262 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9263 r_indx, input_bfd))
9264 goto error_ret_free_internal;
9265 hash = (struct ppc_link_hash_entry *) h;
9266
9267 ok_dest = FALSE;
9268 fdh = NULL;
9269 sym_value = 0;
9270 if (hash == NULL)
9271 {
9272 sym_value = sym->st_value;
9273 ok_dest = TRUE;
9274 }
9275 else if (hash->elf.root.type == bfd_link_hash_defined
9276 || hash->elf.root.type == bfd_link_hash_defweak)
9277 {
9278 sym_value = hash->elf.root.u.def.value;
9279 if (sym_sec->output_section != NULL)
9280 ok_dest = TRUE;
9281 }
9282 else if (hash->elf.root.type == bfd_link_hash_undefweak
9283 || hash->elf.root.type == bfd_link_hash_undefined)
9284 {
9285 /* Recognise an old ABI func code entry sym, and
9286 use the func descriptor sym instead if it is
9287 defined. */
9288 if (hash->elf.root.root.string[0] == '.'
9289 && (fdh = get_fdh (hash, htab)) != NULL)
9290 {
9291 if (fdh->elf.root.type == bfd_link_hash_defined
9292 || fdh->elf.root.type == bfd_link_hash_defweak)
9293 {
9294 sym_sec = fdh->elf.root.u.def.section;
9295 sym_value = fdh->elf.root.u.def.value;
9296 if (sym_sec->output_section != NULL)
9297 ok_dest = TRUE;
9298 }
9299 else
9300 fdh = NULL;
9301 }
9302 }
9303 else
9304 {
9305 bfd_set_error (bfd_error_bad_value);
9306 goto error_ret_free_internal;
9307 }
9308
9309 destination = 0;
9310 if (ok_dest)
9311 {
9312 sym_value += irela->r_addend;
9313 destination = (sym_value
9314 + sym_sec->output_offset
9315 + sym_sec->output_section->vma);
9316 }
9317
9318 code_sec = sym_sec;
9319 opd_adjust = get_opd_info (sym_sec);
9320 if (opd_adjust != NULL)
9321 {
9322 bfd_vma dest;
9323
9324 if (hash == NULL)
9325 {
9326 long adjust = opd_adjust[sym_value / 8];
9327 if (adjust == -1)
9328 continue;
9329 sym_value += adjust;
9330 }
9331 dest = opd_entry_value (sym_sec, sym_value,
9332 &code_sec, &sym_value);
9333 if (dest != (bfd_vma) -1)
9334 {
9335 destination = dest;
9336 if (fdh != NULL)
9337 {
9338 /* Fixup old ABI sym to point at code
9339 entry. */
9340 hash->elf.root.type = bfd_link_hash_defweak;
9341 hash->elf.root.u.def.section = code_sec;
9342 hash->elf.root.u.def.value = sym_value;
9343 }
9344 }
9345 }
9346
9347 /* Determine what (if any) linker stub is needed. */
9348 stub_type = ppc_type_of_stub (section, irela, &hash,
9349 destination);
9350
9351 if (stub_type != ppc_stub_plt_call)
9352 {
9353 /* Check whether we need a TOC adjusting stub.
9354 Since the linker pastes together pieces from
9355 different object files when creating the
9356 _init and _fini functions, it may be that a
9357 call to what looks like a local sym is in
9358 fact a call needing a TOC adjustment. */
9359 if (code_sec != NULL
9360 && code_sec->output_section != NULL
9361 && (htab->stub_group[code_sec->id].toc_off
9362 != htab->stub_group[section->id].toc_off)
9363 && (code_sec->has_toc_reloc
9364 || code_sec->makes_toc_func_call))
9365 stub_type = ppc_stub_long_branch_r2off;
9366 }
9367
9368 if (stub_type == ppc_stub_none)
9369 continue;
9370
9371 /* __tls_get_addr calls might be eliminated. */
9372 if (stub_type != ppc_stub_plt_call
9373 && hash != NULL
9374 && (hash == htab->tls_get_addr
9375 || hash == htab->tls_get_addr_fd)
9376 && section->has_tls_reloc
9377 && irela != internal_relocs)
9378 {
9379 /* Get tls info. */
9380 char *tls_mask;
9381
9382 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9383 irela - 1, input_bfd))
9384 goto error_ret_free_internal;
9385 if (*tls_mask != 0)
9386 continue;
9387 }
9388
9389 /* Support for grouping stub sections. */
9390 id_sec = htab->stub_group[section->id].link_sec;
9391
9392 /* Get the name of this stub. */
9393 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9394 if (!stub_name)
9395 goto error_ret_free_internal;
9396
9397 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9398 stub_name, FALSE, FALSE);
9399 if (stub_entry != NULL)
9400 {
9401 /* The proper stub has already been created. */
9402 free (stub_name);
9403 continue;
9404 }
9405
9406 stub_entry = ppc_add_stub (stub_name, section, htab);
9407 if (stub_entry == NULL)
9408 {
9409 free (stub_name);
9410 error_ret_free_internal:
9411 if (elf_section_data (section)->relocs == NULL)
9412 free (internal_relocs);
9413 error_ret_free_local:
9414 if (local_syms != NULL
9415 && (symtab_hdr->contents
9416 != (unsigned char *) local_syms))
9417 free (local_syms);
9418 return FALSE;
9419 }
9420
9421 stub_entry->stub_type = stub_type;
9422 stub_entry->target_value = sym_value;
9423 stub_entry->target_section = code_sec;
9424 stub_entry->h = hash;
9425 stub_entry->addend = irela->r_addend;
9426
9427 if (stub_entry->h != NULL)
9428 htab->stub_globals += 1;
9429 }
9430
9431 /* We're done with the internal relocs, free them. */
9432 if (elf_section_data (section)->relocs != internal_relocs)
9433 free (internal_relocs);
9434 }
9435
9436 if (local_syms != NULL
9437 && symtab_hdr->contents != (unsigned char *) local_syms)
9438 {
9439 if (!info->keep_memory)
9440 free (local_syms);
9441 else
9442 symtab_hdr->contents = (unsigned char *) local_syms;
9443 }
9444 }
9445
9446 /* We may have added some stubs. Find out the new size of the
9447 stub sections. */
9448 for (stub_sec = htab->stub_bfd->sections;
9449 stub_sec != NULL;
9450 stub_sec = stub_sec->next)
9451 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9452 {
9453 stub_sec->rawsize = stub_sec->size;
9454 stub_sec->size = 0;
9455 stub_sec->reloc_count = 0;
9456 stub_sec->flags &= ~SEC_RELOC;
9457 }
9458
9459 htab->brlt->size = 0;
9460 htab->brlt->reloc_count = 0;
9461 htab->brlt->flags &= ~SEC_RELOC;
9462 if (htab->relbrlt != NULL)
9463 htab->relbrlt->size = 0;
9464
9465 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9466
9467 for (stub_sec = htab->stub_bfd->sections;
9468 stub_sec != NULL;
9469 stub_sec = stub_sec->next)
9470 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9471 && stub_sec->rawsize != stub_sec->size)
9472 break;
9473
9474 /* Exit from this loop when no stubs have been added, and no stubs
9475 have changed size. */
9476 if (stub_sec == NULL)
9477 break;
9478
9479 /* Ask the linker to do its stuff. */
9480 (*htab->layout_sections_again) ();
9481 }
9482
9483 /* It would be nice to strip htab->brlt from the output if the
9484 section is empty, but it's too late. If we strip sections here,
9485 the dynamic symbol table is corrupted since the section symbol
9486 for the stripped section isn't written. */
9487
9488 return TRUE;
9489 }
9490
9491 /* Called after we have determined section placement. If sections
9492 move, we'll be called again. Provide a value for TOCstart. */
9493
9494 bfd_vma
9495 ppc64_elf_toc (bfd *obfd)
9496 {
9497 asection *s;
9498 bfd_vma TOCstart;
9499
9500 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9501 order. The TOC starts where the first of these sections starts. */
9502 s = bfd_get_section_by_name (obfd, ".got");
9503 if (s == NULL)
9504 s = bfd_get_section_by_name (obfd, ".toc");
9505 if (s == NULL)
9506 s = bfd_get_section_by_name (obfd, ".tocbss");
9507 if (s == NULL)
9508 s = bfd_get_section_by_name (obfd, ".plt");
9509 if (s == NULL)
9510 {
9511 /* This may happen for
9512 o references to TOC base (SYM@toc / TOC[tc0]) without a
9513 .toc directive
9514 o bad linker script
9515 o --gc-sections and empty TOC sections
9516
9517 FIXME: Warn user? */
9518
9519 /* Look for a likely section. We probably won't even be
9520 using TOCstart. */
9521 for (s = obfd->sections; s != NULL; s = s->next)
9522 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9523 == (SEC_ALLOC | SEC_SMALL_DATA))
9524 break;
9525 if (s == NULL)
9526 for (s = obfd->sections; s != NULL; s = s->next)
9527 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9528 == (SEC_ALLOC | SEC_SMALL_DATA))
9529 break;
9530 if (s == NULL)
9531 for (s = obfd->sections; s != NULL; s = s->next)
9532 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9533 break;
9534 if (s == NULL)
9535 for (s = obfd->sections; s != NULL; s = s->next)
9536 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9537 break;
9538 }
9539
9540 TOCstart = 0;
9541 if (s != NULL)
9542 TOCstart = s->output_section->vma + s->output_offset;
9543
9544 return TOCstart;
9545 }
9546
9547 /* Build all the stubs associated with the current output file.
9548 The stubs are kept in a hash table attached to the main linker
9549 hash table. This function is called via gldelf64ppc_finish. */
9550
9551 bfd_boolean
9552 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9553 struct bfd_link_info *info,
9554 char **stats)
9555 {
9556 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9557 asection *stub_sec;
9558 bfd_byte *p;
9559 int stub_sec_count = 0;
9560
9561 htab->emit_stub_syms = emit_stub_syms;
9562
9563 /* Allocate memory to hold the linker stubs. */
9564 for (stub_sec = htab->stub_bfd->sections;
9565 stub_sec != NULL;
9566 stub_sec = stub_sec->next)
9567 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9568 && stub_sec->size != 0)
9569 {
9570 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9571 if (stub_sec->contents == NULL)
9572 return FALSE;
9573 /* We want to check that built size is the same as calculated
9574 size. rawsize is a convenient location to use. */
9575 stub_sec->rawsize = stub_sec->size;
9576 stub_sec->size = 0;
9577 }
9578
9579 if (htab->glink != NULL && htab->glink->size != 0)
9580 {
9581 unsigned int indx;
9582 bfd_vma plt0;
9583
9584 /* Build the .glink plt call stub. */
9585 if (htab->emit_stub_syms)
9586 {
9587 struct elf_link_hash_entry *h;
9588 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9589 if (h == NULL)
9590 return FALSE;
9591 if (h->root.type == bfd_link_hash_new)
9592 {
9593 h->root.type = bfd_link_hash_defined;
9594 h->root.u.def.section = htab->glink;
9595 h->root.u.def.value = 8;
9596 h->ref_regular = 1;
9597 h->def_regular = 1;
9598 h->ref_regular_nonweak = 1;
9599 h->forced_local = 1;
9600 h->non_elf = 0;
9601 }
9602 }
9603 p = htab->glink->contents;
9604 plt0 = (htab->plt->output_section->vma
9605 + htab->plt->output_offset
9606 - (htab->glink->output_section->vma
9607 + htab->glink->output_offset
9608 + 16));
9609 bfd_put_64 (htab->glink->owner, plt0, p);
9610 p += 8;
9611 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9612 p += 4;
9613 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9614 p += 4;
9615 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9616 p += 4;
9617 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9618 p += 4;
9619 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9620 p += 4;
9621 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9622 p += 4;
9623 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9624 p += 4;
9625 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9626 p += 4;
9627 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9628 p += 4;
9629 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9630 p += 4;
9631 bfd_put_32 (htab->glink->owner, BCTR, p);
9632 p += 4;
9633 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9634 {
9635 bfd_put_32 (htab->glink->owner, NOP, p);
9636 p += 4;
9637 }
9638
9639 /* Build the .glink lazy link call stubs. */
9640 indx = 0;
9641 while (p < htab->glink->contents + htab->glink->size)
9642 {
9643 if (indx < 0x8000)
9644 {
9645 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9646 p += 4;
9647 }
9648 else
9649 {
9650 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9651 p += 4;
9652 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9653 p += 4;
9654 }
9655 bfd_put_32 (htab->glink->owner,
9656 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9657 indx++;
9658 p += 4;
9659 }
9660 htab->glink->rawsize = p - htab->glink->contents;
9661 }
9662
9663 if (htab->brlt->size != 0)
9664 {
9665 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9666 htab->brlt->size);
9667 if (htab->brlt->contents == NULL)
9668 return FALSE;
9669 }
9670 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9671 {
9672 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9673 htab->relbrlt->size);
9674 if (htab->relbrlt->contents == NULL)
9675 return FALSE;
9676 }
9677
9678 /* Build the stubs as directed by the stub hash table. */
9679 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9680
9681 if (htab->relbrlt != NULL)
9682 htab->relbrlt->reloc_count = 0;
9683
9684 for (stub_sec = htab->stub_bfd->sections;
9685 stub_sec != NULL;
9686 stub_sec = stub_sec->next)
9687 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9688 {
9689 stub_sec_count += 1;
9690 if (stub_sec->rawsize != stub_sec->size)
9691 break;
9692 }
9693
9694 if (stub_sec != NULL
9695 || htab->glink->rawsize != htab->glink->size)
9696 {
9697 htab->stub_error = TRUE;
9698 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9699 }
9700
9701 if (htab->stub_error)
9702 return FALSE;
9703
9704 if (stats != NULL)
9705 {
9706 *stats = bfd_malloc (500);
9707 if (*stats == NULL)
9708 return FALSE;
9709
9710 sprintf (*stats, _("linker stubs in %u group%s\n"
9711 " branch %lu\n"
9712 " toc adjust %lu\n"
9713 " long branch %lu\n"
9714 " long toc adj %lu\n"
9715 " plt call %lu"),
9716 stub_sec_count,
9717 stub_sec_count == 1 ? "" : "s",
9718 htab->stub_count[ppc_stub_long_branch - 1],
9719 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9720 htab->stub_count[ppc_stub_plt_branch - 1],
9721 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9722 htab->stub_count[ppc_stub_plt_call - 1]);
9723 }
9724 return TRUE;
9725 }
9726
9727 /* This function undoes the changes made by add_symbol_adjust. */
9728
9729 static bfd_boolean
9730 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9731 {
9732 struct ppc_link_hash_entry *eh;
9733
9734 if (h->root.type == bfd_link_hash_indirect)
9735 return TRUE;
9736
9737 if (h->root.type == bfd_link_hash_warning)
9738 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9739
9740 eh = (struct ppc_link_hash_entry *) h;
9741 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9742 return TRUE;
9743
9744 eh->elf.root.type = bfd_link_hash_undefined;
9745 return TRUE;
9746 }
9747
9748 void
9749 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9750 {
9751 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9752 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9753 }
9754
9755 /* What to do when ld finds relocations against symbols defined in
9756 discarded sections. */
9757
9758 static unsigned int
9759 ppc64_elf_action_discarded (asection *sec)
9760 {
9761 if (strcmp (".opd", sec->name) == 0)
9762 return 0;
9763
9764 if (strcmp (".toc", sec->name) == 0)
9765 return 0;
9766
9767 if (strcmp (".toc1", sec->name) == 0)
9768 return 0;
9769
9770 return _bfd_elf_default_action_discarded (sec);
9771 }
9772
9773 /* The RELOCATE_SECTION function is called by the ELF backend linker
9774 to handle the relocations for a section.
9775
9776 The relocs are always passed as Rela structures; if the section
9777 actually uses Rel structures, the r_addend field will always be
9778 zero.
9779
9780 This function is responsible for adjust the section contents as
9781 necessary, and (if using Rela relocs and generating a
9782 relocatable output file) adjusting the reloc addend as
9783 necessary.
9784
9785 This function does not have to worry about setting the reloc
9786 address or the reloc symbol index.
9787
9788 LOCAL_SYMS is a pointer to the swapped in local symbols.
9789
9790 LOCAL_SECTIONS is an array giving the section in the input file
9791 corresponding to the st_shndx field of each local symbol.
9792
9793 The global hash table entry for the global symbols can be found
9794 via elf_sym_hashes (input_bfd).
9795
9796 When generating relocatable output, this function must handle
9797 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9798 going to be the section symbol corresponding to the output
9799 section, which means that the addend must be adjusted
9800 accordingly. */
9801
9802 static bfd_boolean
9803 ppc64_elf_relocate_section (bfd *output_bfd,
9804 struct bfd_link_info *info,
9805 bfd *input_bfd,
9806 asection *input_section,
9807 bfd_byte *contents,
9808 Elf_Internal_Rela *relocs,
9809 Elf_Internal_Sym *local_syms,
9810 asection **local_sections)
9811 {
9812 struct ppc_link_hash_table *htab;
9813 Elf_Internal_Shdr *symtab_hdr;
9814 struct elf_link_hash_entry **sym_hashes;
9815 Elf_Internal_Rela *rel;
9816 Elf_Internal_Rela *relend;
9817 Elf_Internal_Rela outrel;
9818 bfd_byte *loc;
9819 struct got_entry **local_got_ents;
9820 bfd_vma TOCstart;
9821 bfd_boolean ret = TRUE;
9822 bfd_boolean is_opd;
9823 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9824 bfd_boolean is_power4 = FALSE;
9825 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
9826
9827 /* Initialize howto table if needed. */
9828 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9829 ppc_howto_init ();
9830
9831 htab = ppc_hash_table (info);
9832
9833 /* Don't relocate stub sections. */
9834 if (input_section->owner == htab->stub_bfd)
9835 return TRUE;
9836
9837 local_got_ents = elf_local_got_ents (input_bfd);
9838 TOCstart = elf_gp (output_bfd);
9839 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9840 sym_hashes = elf_sym_hashes (input_bfd);
9841 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
9842
9843 rel = relocs;
9844 relend = relocs + input_section->reloc_count;
9845 for (; rel < relend; rel++)
9846 {
9847 enum elf_ppc64_reloc_type r_type;
9848 bfd_vma addend, orig_addend;
9849 bfd_reloc_status_type r;
9850 Elf_Internal_Sym *sym;
9851 asection *sec;
9852 struct elf_link_hash_entry *h_elf;
9853 struct ppc_link_hash_entry *h;
9854 struct ppc_link_hash_entry *fdh;
9855 const char *sym_name;
9856 unsigned long r_symndx, toc_symndx;
9857 char tls_mask, tls_gd, tls_type;
9858 char sym_type;
9859 bfd_vma relocation;
9860 bfd_boolean unresolved_reloc;
9861 bfd_boolean warned;
9862 unsigned long insn, mask;
9863 struct ppc_stub_hash_entry *stub_entry;
9864 bfd_vma max_br_offset;
9865 bfd_vma from;
9866
9867 r_type = ELF64_R_TYPE (rel->r_info);
9868 r_symndx = ELF64_R_SYM (rel->r_info);
9869
9870 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9871 symbol of the previous ADDR64 reloc. The symbol gives us the
9872 proper TOC base to use. */
9873 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9874 && rel != relocs
9875 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9876 && is_opd)
9877 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9878
9879 sym = NULL;
9880 sec = NULL;
9881 h_elf = NULL;
9882 sym_name = NULL;
9883 unresolved_reloc = FALSE;
9884 warned = FALSE;
9885 orig_addend = rel->r_addend;
9886
9887 if (r_symndx < symtab_hdr->sh_info)
9888 {
9889 /* It's a local symbol. */
9890 long *opd_adjust;
9891
9892 sym = local_syms + r_symndx;
9893 sec = local_sections[r_symndx];
9894 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9895 sym_type = ELF64_ST_TYPE (sym->st_info);
9896 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9897 opd_adjust = get_opd_info (sec);
9898 if (opd_adjust != NULL)
9899 {
9900 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9901 if (adjust == -1)
9902 relocation = 0;
9903 else
9904 {
9905 /* If this is a relocation against the opd section sym
9906 and we have edited .opd, adjust the reloc addend so
9907 that ld -r and ld --emit-relocs output is correct.
9908 If it is a reloc against some other .opd symbol,
9909 then the symbol value will be adjusted later. */
9910 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9911 rel->r_addend += adjust;
9912 else
9913 relocation += adjust;
9914 }
9915 }
9916 }
9917 else
9918 {
9919 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9920 r_symndx, symtab_hdr, sym_hashes,
9921 h_elf, sec, relocation,
9922 unresolved_reloc, warned);
9923 sym_name = h_elf->root.root.string;
9924 sym_type = h_elf->type;
9925 }
9926 h = (struct ppc_link_hash_entry *) h_elf;
9927
9928 if (sec != NULL && elf_discarded_section (sec))
9929 {
9930 /* For relocs against symbols from removed linkonce sections,
9931 or sections discarded by a linker script, we just want the
9932 section contents zeroed. Avoid any special processing. */
9933 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
9934 contents + rel->r_offset);
9935 rel->r_info = 0;
9936 rel->r_addend = 0;
9937 continue;
9938 }
9939
9940 if (info->relocatable)
9941 continue;
9942
9943 /* TLS optimizations. Replace instruction sequences and relocs
9944 based on information we collected in tls_optimize. We edit
9945 RELOCS so that --emit-relocs will output something sensible
9946 for the final instruction stream. */
9947 tls_mask = 0;
9948 tls_gd = 0;
9949 toc_symndx = 0;
9950 if (IS_PPC64_TLS_RELOC (r_type))
9951 {
9952 if (h != NULL)
9953 tls_mask = h->tls_mask;
9954 else if (local_got_ents != NULL)
9955 {
9956 char *lgot_masks;
9957 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9958 tls_mask = lgot_masks[r_symndx];
9959 }
9960 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9961 {
9962 /* Check for toc tls entries. */
9963 char *toc_tls;
9964
9965 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9966 rel, input_bfd))
9967 return FALSE;
9968
9969 if (toc_tls)
9970 tls_mask = *toc_tls;
9971 }
9972 }
9973
9974 /* Check that tls relocs are used with tls syms, and non-tls
9975 relocs are used with non-tls syms. */
9976 if (r_symndx != 0
9977 && r_type != R_PPC64_NONE
9978 && (h == NULL
9979 || h->elf.root.type == bfd_link_hash_defined
9980 || h->elf.root.type == bfd_link_hash_defweak)
9981 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9982 {
9983 if (r_type == R_PPC64_TLS && tls_mask != 0)
9984 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9985 ;
9986 else
9987 (*_bfd_error_handler)
9988 (sym_type == STT_TLS
9989 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9990 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9991 input_bfd,
9992 input_section,
9993 (long) rel->r_offset,
9994 ppc64_elf_howto_table[r_type]->name,
9995 sym_name);
9996 }
9997
9998 /* Ensure reloc mapping code below stays sane. */
9999 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10000 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10001 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10002 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10003 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10004 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10005 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10006 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10007 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10008 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10009 abort ();
10010
10011 switch (r_type)
10012 {
10013 default:
10014 break;
10015
10016 case R_PPC64_TOC16:
10017 case R_PPC64_TOC16_LO:
10018 case R_PPC64_TOC16_DS:
10019 case R_PPC64_TOC16_LO_DS:
10020 {
10021 /* Check for toc tls entries. */
10022 char *toc_tls;
10023 int retval;
10024
10025 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10026 rel, input_bfd);
10027 if (retval == 0)
10028 return FALSE;
10029
10030 if (toc_tls)
10031 {
10032 tls_mask = *toc_tls;
10033 if (r_type == R_PPC64_TOC16_DS
10034 || r_type == R_PPC64_TOC16_LO_DS)
10035 {
10036 if (tls_mask != 0
10037 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10038 goto toctprel;
10039 }
10040 else
10041 {
10042 /* If we found a GD reloc pair, then we might be
10043 doing a GD->IE transition. */
10044 if (retval == 2)
10045 {
10046 tls_gd = TLS_TPRELGD;
10047 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10048 goto tls_get_addr_check;
10049 }
10050 else if (retval == 3)
10051 {
10052 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10053 goto tls_get_addr_check;
10054 }
10055 }
10056 }
10057 }
10058 break;
10059
10060 case R_PPC64_GOT_TPREL16_DS:
10061 case R_PPC64_GOT_TPREL16_LO_DS:
10062 if (tls_mask != 0
10063 && (tls_mask & TLS_TPREL) == 0)
10064 {
10065 toctprel:
10066 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10067 insn &= 31 << 21;
10068 insn |= 0x3c0d0000; /* addis 0,13,0 */
10069 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10070 r_type = R_PPC64_TPREL16_HA;
10071 if (toc_symndx != 0)
10072 {
10073 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10074 /* We changed the symbol. Start over in order to
10075 get h, sym, sec etc. right. */
10076 rel--;
10077 continue;
10078 }
10079 else
10080 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10081 }
10082 break;
10083
10084 case R_PPC64_TLS:
10085 if (tls_mask != 0
10086 && (tls_mask & TLS_TPREL) == 0)
10087 {
10088 bfd_vma rtra;
10089 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10090 if ((insn & ((0x3f << 26) | (31 << 11)))
10091 == ((31 << 26) | (13 << 11)))
10092 rtra = insn & ((1 << 26) - (1 << 16));
10093 else if ((insn & ((0x3f << 26) | (31 << 16)))
10094 == ((31 << 26) | (13 << 16)))
10095 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10096 else
10097 abort ();
10098 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10099 /* add -> addi. */
10100 insn = 14 << 26;
10101 else if ((insn & (31 << 1)) == 23 << 1
10102 && ((insn & (31 << 6)) < 14 << 6
10103 || ((insn & (31 << 6)) >= 16 << 6
10104 && (insn & (31 << 6)) < 24 << 6)))
10105 /* load and store indexed -> dform. */
10106 insn = (32 | ((insn >> 6) & 31)) << 26;
10107 else if ((insn & (31 << 1)) == 21 << 1
10108 && (insn & (0x1a << 6)) == 0)
10109 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10110 insn = (((58 | ((insn >> 6) & 4)) << 26)
10111 | ((insn >> 6) & 1));
10112 else if ((insn & (31 << 1)) == 21 << 1
10113 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10114 /* lwax -> lwa. */
10115 insn = (58 << 26) | 2;
10116 else
10117 abort ();
10118 insn |= rtra;
10119 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10120 /* Was PPC64_TLS which sits on insn boundary, now
10121 PPC64_TPREL16_LO which is at low-order half-word. */
10122 rel->r_offset += d_offset;
10123 r_type = R_PPC64_TPREL16_LO;
10124 if (toc_symndx != 0)
10125 {
10126 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10127 /* We changed the symbol. Start over in order to
10128 get h, sym, sec etc. right. */
10129 rel--;
10130 continue;
10131 }
10132 else
10133 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10134 }
10135 break;
10136
10137 case R_PPC64_GOT_TLSGD16_HI:
10138 case R_PPC64_GOT_TLSGD16_HA:
10139 tls_gd = TLS_TPRELGD;
10140 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10141 goto tls_gdld_hi;
10142 break;
10143
10144 case R_PPC64_GOT_TLSLD16_HI:
10145 case R_PPC64_GOT_TLSLD16_HA:
10146 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10147 {
10148 tls_gdld_hi:
10149 if ((tls_mask & tls_gd) != 0)
10150 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10151 + R_PPC64_GOT_TPREL16_DS);
10152 else
10153 {
10154 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10155 rel->r_offset -= d_offset;
10156 r_type = R_PPC64_NONE;
10157 }
10158 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10159 }
10160 break;
10161
10162 case R_PPC64_GOT_TLSGD16:
10163 case R_PPC64_GOT_TLSGD16_LO:
10164 tls_gd = TLS_TPRELGD;
10165 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10166 goto tls_get_addr_check;
10167 break;
10168
10169 case R_PPC64_GOT_TLSLD16:
10170 case R_PPC64_GOT_TLSLD16_LO:
10171 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10172 {
10173 tls_get_addr_check:
10174 if (rel + 1 < relend)
10175 {
10176 enum elf_ppc64_reloc_type r_type2;
10177 unsigned long r_symndx2;
10178 struct elf_link_hash_entry *h2;
10179 bfd_vma insn1, insn2, insn3;
10180 bfd_vma offset;
10181
10182 /* The next instruction should be a call to
10183 __tls_get_addr. Peek at the reloc to be sure. */
10184 r_type2 = ELF64_R_TYPE (rel[1].r_info);
10185 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
10186 if (r_symndx2 < symtab_hdr->sh_info
10187 || (r_type2 != R_PPC64_REL14
10188 && r_type2 != R_PPC64_REL14_BRTAKEN
10189 && r_type2 != R_PPC64_REL14_BRNTAKEN
10190 && r_type2 != R_PPC64_REL24))
10191 break;
10192
10193 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
10194 while (h2->root.type == bfd_link_hash_indirect
10195 || h2->root.type == bfd_link_hash_warning)
10196 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
10197 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
10198 && h2 != &htab->tls_get_addr_fd->elf))
10199 break;
10200
10201 /* OK, it checks out. Replace the call. */
10202 offset = rel[1].r_offset;
10203 insn1 = bfd_get_32 (output_bfd,
10204 contents + rel->r_offset - d_offset);
10205 insn3 = bfd_get_32 (output_bfd,
10206 contents + offset + 4);
10207 if ((tls_mask & tls_gd) != 0)
10208 {
10209 /* IE */
10210 insn1 &= (1 << 26) - (1 << 2);
10211 insn1 |= 58 << 26; /* ld */
10212 insn2 = 0x7c636a14; /* add 3,3,13 */
10213 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
10214 if ((tls_mask & TLS_EXPLICIT) == 0)
10215 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10216 + R_PPC64_GOT_TPREL16_DS);
10217 else
10218 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10219 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10220 }
10221 else
10222 {
10223 /* LE */
10224 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10225 insn2 = 0x38630000; /* addi 3,3,0 */
10226 if (tls_gd == 0)
10227 {
10228 /* Was an LD reloc. */
10229 r_symndx = 0;
10230 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10231 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10232 }
10233 else if (toc_symndx != 0)
10234 r_symndx = toc_symndx;
10235 r_type = R_PPC64_TPREL16_HA;
10236 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10237 rel[1].r_info = ELF64_R_INFO (r_symndx,
10238 R_PPC64_TPREL16_LO);
10239 rel[1].r_offset += d_offset;
10240 }
10241 if (insn3 == NOP
10242 || insn3 == CROR_151515 || insn3 == CROR_313131)
10243 {
10244 insn3 = insn2;
10245 insn2 = NOP;
10246 rel[1].r_offset += 4;
10247 }
10248 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
10249 bfd_put_32 (output_bfd, insn2, contents + offset);
10250 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10251 if (tls_gd == 0 || toc_symndx != 0)
10252 {
10253 /* We changed the symbol. Start over in order
10254 to get h, sym, sec etc. right. */
10255 rel--;
10256 continue;
10257 }
10258 }
10259 }
10260 break;
10261
10262 case R_PPC64_DTPMOD64:
10263 if (rel + 1 < relend
10264 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10265 && rel[1].r_offset == rel->r_offset + 8)
10266 {
10267 if ((tls_mask & TLS_GD) == 0)
10268 {
10269 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10270 if ((tls_mask & TLS_TPRELGD) != 0)
10271 r_type = R_PPC64_TPREL64;
10272 else
10273 {
10274 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10275 r_type = R_PPC64_NONE;
10276 }
10277 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10278 }
10279 }
10280 else
10281 {
10282 if ((tls_mask & TLS_LD) == 0)
10283 {
10284 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10285 r_type = R_PPC64_NONE;
10286 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10287 }
10288 }
10289 break;
10290
10291 case R_PPC64_TPREL64:
10292 if ((tls_mask & TLS_TPREL) == 0)
10293 {
10294 r_type = R_PPC64_NONE;
10295 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10296 }
10297 break;
10298 }
10299
10300 /* Handle other relocations that tweak non-addend part of insn. */
10301 insn = 0;
10302 max_br_offset = 1 << 25;
10303 addend = rel->r_addend;
10304 switch (r_type)
10305 {
10306 default:
10307 break;
10308
10309 /* Branch taken prediction relocations. */
10310 case R_PPC64_ADDR14_BRTAKEN:
10311 case R_PPC64_REL14_BRTAKEN:
10312 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10313 /* Fall thru. */
10314
10315 /* Branch not taken prediction relocations. */
10316 case R_PPC64_ADDR14_BRNTAKEN:
10317 case R_PPC64_REL14_BRNTAKEN:
10318 insn |= bfd_get_32 (output_bfd,
10319 contents + rel->r_offset) & ~(0x01 << 21);
10320 /* Fall thru. */
10321
10322 case R_PPC64_REL14:
10323 max_br_offset = 1 << 15;
10324 /* Fall thru. */
10325
10326 case R_PPC64_REL24:
10327 /* Calls to functions with a different TOC, such as calls to
10328 shared objects, need to alter the TOC pointer. This is
10329 done using a linkage stub. A REL24 branching to these
10330 linkage stubs needs to be followed by a nop, as the nop
10331 will be replaced with an instruction to restore the TOC
10332 base pointer. */
10333 stub_entry = NULL;
10334 fdh = h;
10335 if (((h != NULL
10336 && (((fdh = h->oh) != NULL
10337 && fdh->elf.plt.plist != NULL)
10338 || (fdh = h)->elf.plt.plist != NULL))
10339 || (sec != NULL
10340 && sec->output_section != NULL
10341 && sec->id <= htab->top_id
10342 && (htab->stub_group[sec->id].toc_off
10343 != htab->stub_group[input_section->id].toc_off)))
10344 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10345 rel, htab)) != NULL
10346 && (stub_entry->stub_type == ppc_stub_plt_call
10347 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10348 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10349 {
10350 bfd_boolean can_plt_call = FALSE;
10351
10352 if (rel->r_offset + 8 <= input_section->size)
10353 {
10354 unsigned long nop;
10355 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10356 if (nop == NOP
10357 || nop == CROR_151515 || nop == CROR_313131)
10358 {
10359 bfd_put_32 (input_bfd, LD_R2_40R1,
10360 contents + rel->r_offset + 4);
10361 can_plt_call = TRUE;
10362 }
10363 }
10364
10365 if (!can_plt_call)
10366 {
10367 if (stub_entry->stub_type == ppc_stub_plt_call)
10368 {
10369 /* If this is a plain branch rather than a branch
10370 and link, don't require a nop. However, don't
10371 allow tail calls in a shared library as they
10372 will result in r2 being corrupted. */
10373 unsigned long br;
10374 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10375 if (info->executable && (br & 1) == 0)
10376 can_plt_call = TRUE;
10377 else
10378 stub_entry = NULL;
10379 }
10380 else if (h != NULL
10381 && strcmp (h->elf.root.root.string,
10382 ".__libc_start_main") == 0)
10383 {
10384 /* Allow crt1 branch to go via a toc adjusting stub. */
10385 can_plt_call = TRUE;
10386 }
10387 else
10388 {
10389 if (strcmp (input_section->output_section->name,
10390 ".init") == 0
10391 || strcmp (input_section->output_section->name,
10392 ".fini") == 0)
10393 (*_bfd_error_handler)
10394 (_("%B(%A+0x%lx): automatic multiple TOCs "
10395 "not supported using your crt files; "
10396 "recompile with -mminimal-toc or upgrade gcc"),
10397 input_bfd,
10398 input_section,
10399 (long) rel->r_offset);
10400 else
10401 (*_bfd_error_handler)
10402 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10403 "does not allow automatic multiple TOCs; "
10404 "recompile with -mminimal-toc or "
10405 "-fno-optimize-sibling-calls, "
10406 "or make `%s' extern"),
10407 input_bfd,
10408 input_section,
10409 (long) rel->r_offset,
10410 sym_name,
10411 sym_name);
10412 bfd_set_error (bfd_error_bad_value);
10413 ret = FALSE;
10414 }
10415 }
10416
10417 if (can_plt_call
10418 && stub_entry->stub_type == ppc_stub_plt_call)
10419 unresolved_reloc = FALSE;
10420 }
10421
10422 if (stub_entry == NULL
10423 && get_opd_info (sec) != NULL)
10424 {
10425 /* The branch destination is the value of the opd entry. */
10426 bfd_vma off = (relocation + addend
10427 - sec->output_section->vma
10428 - sec->output_offset);
10429 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10430 if (dest != (bfd_vma) -1)
10431 {
10432 relocation = dest;
10433 addend = 0;
10434 }
10435 }
10436
10437 /* If the branch is out of reach we ought to have a long
10438 branch stub. */
10439 from = (rel->r_offset
10440 + input_section->output_offset
10441 + input_section->output_section->vma);
10442
10443 if (stub_entry == NULL
10444 && (relocation + addend - from + max_br_offset
10445 >= 2 * max_br_offset)
10446 && r_type != R_PPC64_ADDR14_BRTAKEN
10447 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10448 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10449 htab);
10450
10451 if (stub_entry != NULL)
10452 {
10453 /* Munge up the value and addend so that we call the stub
10454 rather than the procedure directly. */
10455 relocation = (stub_entry->stub_offset
10456 + stub_entry->stub_sec->output_offset
10457 + stub_entry->stub_sec->output_section->vma);
10458 addend = 0;
10459 }
10460
10461 if (insn != 0)
10462 {
10463 if (is_power4)
10464 {
10465 /* Set 'a' bit. This is 0b00010 in BO field for branch
10466 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10467 for branch on CTR insns (BO == 1a00t or 1a01t). */
10468 if ((insn & (0x14 << 21)) == (0x04 << 21))
10469 insn |= 0x02 << 21;
10470 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10471 insn |= 0x08 << 21;
10472 else
10473 break;
10474 }
10475 else
10476 {
10477 /* Invert 'y' bit if not the default. */
10478 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10479 insn ^= 0x01 << 21;
10480 }
10481
10482 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10483 }
10484
10485 /* NOP out calls to undefined weak functions.
10486 We can thus call a weak function without first
10487 checking whether the function is defined. */
10488 else if (h != NULL
10489 && h->elf.root.type == bfd_link_hash_undefweak
10490 && r_type == R_PPC64_REL24
10491 && relocation == 0
10492 && addend == 0)
10493 {
10494 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10495 continue;
10496 }
10497 break;
10498 }
10499
10500 /* Set `addend'. */
10501 tls_type = 0;
10502 switch (r_type)
10503 {
10504 default:
10505 (*_bfd_error_handler)
10506 (_("%B: unknown relocation type %d for symbol %s"),
10507 input_bfd, (int) r_type, sym_name);
10508
10509 bfd_set_error (bfd_error_bad_value);
10510 ret = FALSE;
10511 continue;
10512
10513 case R_PPC64_NONE:
10514 case R_PPC64_TLS:
10515 case R_PPC64_GNU_VTINHERIT:
10516 case R_PPC64_GNU_VTENTRY:
10517 continue;
10518
10519 /* GOT16 relocations. Like an ADDR16 using the symbol's
10520 address in the GOT as relocation value instead of the
10521 symbol's value itself. Also, create a GOT entry for the
10522 symbol and put the symbol value there. */
10523 case R_PPC64_GOT_TLSGD16:
10524 case R_PPC64_GOT_TLSGD16_LO:
10525 case R_PPC64_GOT_TLSGD16_HI:
10526 case R_PPC64_GOT_TLSGD16_HA:
10527 tls_type = TLS_TLS | TLS_GD;
10528 goto dogot;
10529
10530 case R_PPC64_GOT_TLSLD16:
10531 case R_PPC64_GOT_TLSLD16_LO:
10532 case R_PPC64_GOT_TLSLD16_HI:
10533 case R_PPC64_GOT_TLSLD16_HA:
10534 tls_type = TLS_TLS | TLS_LD;
10535 goto dogot;
10536
10537 case R_PPC64_GOT_TPREL16_DS:
10538 case R_PPC64_GOT_TPREL16_LO_DS:
10539 case R_PPC64_GOT_TPREL16_HI:
10540 case R_PPC64_GOT_TPREL16_HA:
10541 tls_type = TLS_TLS | TLS_TPREL;
10542 goto dogot;
10543
10544 case R_PPC64_GOT_DTPREL16_DS:
10545 case R_PPC64_GOT_DTPREL16_LO_DS:
10546 case R_PPC64_GOT_DTPREL16_HI:
10547 case R_PPC64_GOT_DTPREL16_HA:
10548 tls_type = TLS_TLS | TLS_DTPREL;
10549 goto dogot;
10550
10551 case R_PPC64_GOT16:
10552 case R_PPC64_GOT16_LO:
10553 case R_PPC64_GOT16_HI:
10554 case R_PPC64_GOT16_HA:
10555 case R_PPC64_GOT16_DS:
10556 case R_PPC64_GOT16_LO_DS:
10557 dogot:
10558 {
10559 /* Relocation is to the entry for this symbol in the global
10560 offset table. */
10561 asection *got;
10562 bfd_vma *offp;
10563 bfd_vma off;
10564 unsigned long indx = 0;
10565
10566 if (tls_type == (TLS_TLS | TLS_LD)
10567 && (h == NULL
10568 || !h->elf.def_dynamic))
10569 offp = &ppc64_tlsld_got (input_bfd)->offset;
10570 else
10571 {
10572 struct got_entry *ent;
10573
10574 if (h != NULL)
10575 {
10576 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10577 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10578 &h->elf)
10579 || (info->shared
10580 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10581 /* This is actually a static link, or it is a
10582 -Bsymbolic link and the symbol is defined
10583 locally, or the symbol was forced to be local
10584 because of a version file. */
10585 ;
10586 else
10587 {
10588 indx = h->elf.dynindx;
10589 unresolved_reloc = FALSE;
10590 }
10591 ent = h->elf.got.glist;
10592 }
10593 else
10594 {
10595 if (local_got_ents == NULL)
10596 abort ();
10597 ent = local_got_ents[r_symndx];
10598 }
10599
10600 for (; ent != NULL; ent = ent->next)
10601 if (ent->addend == orig_addend
10602 && ent->owner == input_bfd
10603 && ent->tls_type == tls_type)
10604 break;
10605 if (ent == NULL)
10606 abort ();
10607 offp = &ent->got.offset;
10608 }
10609
10610 got = ppc64_elf_tdata (input_bfd)->got;
10611 if (got == NULL)
10612 abort ();
10613
10614 /* The offset must always be a multiple of 8. We use the
10615 least significant bit to record whether we have already
10616 processed this entry. */
10617 off = *offp;
10618 if ((off & 1) != 0)
10619 off &= ~1;
10620 else
10621 {
10622 /* Generate relocs for the dynamic linker, except in
10623 the case of TLSLD where we'll use one entry per
10624 module. */
10625 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10626
10627 *offp = off | 1;
10628 if ((info->shared || indx != 0)
10629 && (h == NULL
10630 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10631 || h->elf.root.type != bfd_link_hash_undefweak))
10632 {
10633 outrel.r_offset = (got->output_section->vma
10634 + got->output_offset
10635 + off);
10636 outrel.r_addend = addend;
10637 if (tls_type & (TLS_LD | TLS_GD))
10638 {
10639 outrel.r_addend = 0;
10640 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10641 if (tls_type == (TLS_TLS | TLS_GD))
10642 {
10643 loc = relgot->contents;
10644 loc += (relgot->reloc_count++
10645 * sizeof (Elf64_External_Rela));
10646 bfd_elf64_swap_reloca_out (output_bfd,
10647 &outrel, loc);
10648 outrel.r_offset += 8;
10649 outrel.r_addend = addend;
10650 outrel.r_info
10651 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10652 }
10653 }
10654 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10655 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10656 else if (tls_type == (TLS_TLS | TLS_TPREL))
10657 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10658 else if (indx == 0)
10659 {
10660 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10661
10662 /* Write the .got section contents for the sake
10663 of prelink. */
10664 loc = got->contents + off;
10665 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10666 loc);
10667 }
10668 else
10669 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10670
10671 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10672 {
10673 outrel.r_addend += relocation;
10674 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10675 outrel.r_addend -= htab->elf.tls_sec->vma;
10676 }
10677 loc = relgot->contents;
10678 loc += (relgot->reloc_count++
10679 * sizeof (Elf64_External_Rela));
10680 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10681 }
10682
10683 /* Init the .got section contents here if we're not
10684 emitting a reloc. */
10685 else
10686 {
10687 relocation += addend;
10688 if (tls_type == (TLS_TLS | TLS_LD))
10689 relocation = 1;
10690 else if (tls_type != 0)
10691 {
10692 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10693 if (tls_type == (TLS_TLS | TLS_TPREL))
10694 relocation += DTP_OFFSET - TP_OFFSET;
10695
10696 if (tls_type == (TLS_TLS | TLS_GD))
10697 {
10698 bfd_put_64 (output_bfd, relocation,
10699 got->contents + off + 8);
10700 relocation = 1;
10701 }
10702 }
10703
10704 bfd_put_64 (output_bfd, relocation,
10705 got->contents + off);
10706 }
10707 }
10708
10709 if (off >= (bfd_vma) -2)
10710 abort ();
10711
10712 relocation = got->output_offset + off;
10713
10714 /* TOC base (r2) is TOC start plus 0x8000. */
10715 addend = -TOC_BASE_OFF;
10716 }
10717 break;
10718
10719 case R_PPC64_PLT16_HA:
10720 case R_PPC64_PLT16_HI:
10721 case R_PPC64_PLT16_LO:
10722 case R_PPC64_PLT32:
10723 case R_PPC64_PLT64:
10724 /* Relocation is to the entry for this symbol in the
10725 procedure linkage table. */
10726
10727 /* Resolve a PLT reloc against a local symbol directly,
10728 without using the procedure linkage table. */
10729 if (h == NULL)
10730 break;
10731
10732 /* It's possible that we didn't make a PLT entry for this
10733 symbol. This happens when statically linking PIC code,
10734 or when using -Bsymbolic. Go find a match if there is a
10735 PLT entry. */
10736 if (htab->plt != NULL)
10737 {
10738 struct plt_entry *ent;
10739 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10740 if (ent->addend == orig_addend
10741 && ent->plt.offset != (bfd_vma) -1)
10742 {
10743 relocation = (htab->plt->output_section->vma
10744 + htab->plt->output_offset
10745 + ent->plt.offset);
10746 unresolved_reloc = FALSE;
10747 }
10748 }
10749 break;
10750
10751 case R_PPC64_TOC:
10752 /* Relocation value is TOC base. */
10753 relocation = TOCstart;
10754 if (r_symndx == 0)
10755 relocation += htab->stub_group[input_section->id].toc_off;
10756 else if (unresolved_reloc)
10757 ;
10758 else if (sec != NULL && sec->id <= htab->top_id)
10759 relocation += htab->stub_group[sec->id].toc_off;
10760 else
10761 unresolved_reloc = TRUE;
10762 goto dodyn;
10763
10764 /* TOC16 relocs. We want the offset relative to the TOC base,
10765 which is the address of the start of the TOC plus 0x8000.
10766 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10767 in this order. */
10768 case R_PPC64_TOC16:
10769 case R_PPC64_TOC16_LO:
10770 case R_PPC64_TOC16_HI:
10771 case R_PPC64_TOC16_DS:
10772 case R_PPC64_TOC16_LO_DS:
10773 case R_PPC64_TOC16_HA:
10774 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10775 break;
10776
10777 /* Relocate against the beginning of the section. */
10778 case R_PPC64_SECTOFF:
10779 case R_PPC64_SECTOFF_LO:
10780 case R_PPC64_SECTOFF_HI:
10781 case R_PPC64_SECTOFF_DS:
10782 case R_PPC64_SECTOFF_LO_DS:
10783 case R_PPC64_SECTOFF_HA:
10784 if (sec != NULL)
10785 addend -= sec->output_section->vma;
10786 break;
10787
10788 case R_PPC64_REL14:
10789 case R_PPC64_REL14_BRNTAKEN:
10790 case R_PPC64_REL14_BRTAKEN:
10791 case R_PPC64_REL24:
10792 break;
10793
10794 case R_PPC64_TPREL16:
10795 case R_PPC64_TPREL16_LO:
10796 case R_PPC64_TPREL16_HI:
10797 case R_PPC64_TPREL16_HA:
10798 case R_PPC64_TPREL16_DS:
10799 case R_PPC64_TPREL16_LO_DS:
10800 case R_PPC64_TPREL16_HIGHER:
10801 case R_PPC64_TPREL16_HIGHERA:
10802 case R_PPC64_TPREL16_HIGHEST:
10803 case R_PPC64_TPREL16_HIGHESTA:
10804 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10805 if (info->shared)
10806 /* The TPREL16 relocs shouldn't really be used in shared
10807 libs as they will result in DT_TEXTREL being set, but
10808 support them anyway. */
10809 goto dodyn;
10810 break;
10811
10812 case R_PPC64_DTPREL16:
10813 case R_PPC64_DTPREL16_LO:
10814 case R_PPC64_DTPREL16_HI:
10815 case R_PPC64_DTPREL16_HA:
10816 case R_PPC64_DTPREL16_DS:
10817 case R_PPC64_DTPREL16_LO_DS:
10818 case R_PPC64_DTPREL16_HIGHER:
10819 case R_PPC64_DTPREL16_HIGHERA:
10820 case R_PPC64_DTPREL16_HIGHEST:
10821 case R_PPC64_DTPREL16_HIGHESTA:
10822 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10823 break;
10824
10825 case R_PPC64_DTPMOD64:
10826 relocation = 1;
10827 addend = 0;
10828 goto dodyn;
10829
10830 case R_PPC64_TPREL64:
10831 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10832 goto dodyn;
10833
10834 case R_PPC64_DTPREL64:
10835 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10836 /* Fall thru */
10837
10838 /* Relocations that may need to be propagated if this is a
10839 dynamic object. */
10840 case R_PPC64_REL30:
10841 case R_PPC64_REL32:
10842 case R_PPC64_REL64:
10843 case R_PPC64_ADDR14:
10844 case R_PPC64_ADDR14_BRNTAKEN:
10845 case R_PPC64_ADDR14_BRTAKEN:
10846 case R_PPC64_ADDR16:
10847 case R_PPC64_ADDR16_DS:
10848 case R_PPC64_ADDR16_HA:
10849 case R_PPC64_ADDR16_HI:
10850 case R_PPC64_ADDR16_HIGHER:
10851 case R_PPC64_ADDR16_HIGHERA:
10852 case R_PPC64_ADDR16_HIGHEST:
10853 case R_PPC64_ADDR16_HIGHESTA:
10854 case R_PPC64_ADDR16_LO:
10855 case R_PPC64_ADDR16_LO_DS:
10856 case R_PPC64_ADDR24:
10857 case R_PPC64_ADDR32:
10858 case R_PPC64_ADDR64:
10859 case R_PPC64_UADDR16:
10860 case R_PPC64_UADDR32:
10861 case R_PPC64_UADDR64:
10862 dodyn:
10863 if ((input_section->flags & SEC_ALLOC) == 0)
10864 break;
10865
10866 if (NO_OPD_RELOCS && is_opd)
10867 break;
10868
10869 if ((info->shared
10870 && (h == NULL
10871 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10872 || h->elf.root.type != bfd_link_hash_undefweak)
10873 && (MUST_BE_DYN_RELOC (r_type)
10874 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10875 || (ELIMINATE_COPY_RELOCS
10876 && !info->shared
10877 && h != NULL
10878 && h->elf.dynindx != -1
10879 && !h->elf.non_got_ref
10880 && h->elf.def_dynamic
10881 && !h->elf.def_regular))
10882 {
10883 Elf_Internal_Rela outrel;
10884 bfd_boolean skip, relocate;
10885 asection *sreloc;
10886 bfd_byte *loc;
10887 bfd_vma out_off;
10888
10889 /* When generating a dynamic object, these relocations
10890 are copied into the output file to be resolved at run
10891 time. */
10892
10893 skip = FALSE;
10894 relocate = FALSE;
10895
10896 out_off = _bfd_elf_section_offset (output_bfd, info,
10897 input_section, rel->r_offset);
10898 if (out_off == (bfd_vma) -1)
10899 skip = TRUE;
10900 else if (out_off == (bfd_vma) -2)
10901 skip = TRUE, relocate = TRUE;
10902 out_off += (input_section->output_section->vma
10903 + input_section->output_offset);
10904 outrel.r_offset = out_off;
10905 outrel.r_addend = rel->r_addend;
10906
10907 /* Optimize unaligned reloc use. */
10908 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10909 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10910 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10911 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10912 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10913 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10914 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10915 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10916 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10917
10918 if (skip)
10919 memset (&outrel, 0, sizeof outrel);
10920 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10921 && !is_opd
10922 && r_type != R_PPC64_TOC)
10923 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10924 else
10925 {
10926 /* This symbol is local, or marked to become local,
10927 or this is an opd section reloc which must point
10928 at a local function. */
10929 outrel.r_addend += relocation;
10930 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10931 {
10932 if (is_opd && h != NULL)
10933 {
10934 /* Lie about opd entries. This case occurs
10935 when building shared libraries and we
10936 reference a function in another shared
10937 lib. The same thing happens for a weak
10938 definition in an application that's
10939 overridden by a strong definition in a
10940 shared lib. (I believe this is a generic
10941 bug in binutils handling of weak syms.)
10942 In these cases we won't use the opd
10943 entry in this lib. */
10944 unresolved_reloc = FALSE;
10945 }
10946 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10947
10948 /* We need to relocate .opd contents for ld.so.
10949 Prelink also wants simple and consistent rules
10950 for relocs. This make all RELATIVE relocs have
10951 *r_offset equal to r_addend. */
10952 relocate = TRUE;
10953 }
10954 else
10955 {
10956 long indx = 0;
10957
10958 if (bfd_is_abs_section (sec))
10959 ;
10960 else if (sec == NULL || sec->owner == NULL)
10961 {
10962 bfd_set_error (bfd_error_bad_value);
10963 return FALSE;
10964 }
10965 else
10966 {
10967 asection *osec;
10968
10969 osec = sec->output_section;
10970 indx = elf_section_data (osec)->dynindx;
10971
10972 if (indx == 0)
10973 {
10974 if ((osec->flags & SEC_READONLY) == 0
10975 && htab->elf.data_index_section != NULL)
10976 osec = htab->elf.data_index_section;
10977 else
10978 osec = htab->elf.text_index_section;
10979 indx = elf_section_data (osec)->dynindx;
10980 }
10981 BFD_ASSERT (indx != 0);
10982
10983 /* We are turning this relocation into one
10984 against a section symbol, so subtract out
10985 the output section's address but not the
10986 offset of the input section in the output
10987 section. */
10988 outrel.r_addend -= osec->vma;
10989 }
10990
10991 outrel.r_info = ELF64_R_INFO (indx, r_type);
10992 }
10993 }
10994
10995 sreloc = elf_section_data (input_section)->sreloc;
10996 if (sreloc == NULL)
10997 abort ();
10998
10999 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11000 >= sreloc->size)
11001 abort ();
11002 loc = sreloc->contents;
11003 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11004 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11005
11006 /* If this reloc is against an external symbol, it will
11007 be computed at runtime, so there's no need to do
11008 anything now. However, for the sake of prelink ensure
11009 that the section contents are a known value. */
11010 if (! relocate)
11011 {
11012 unresolved_reloc = FALSE;
11013 /* The value chosen here is quite arbitrary as ld.so
11014 ignores section contents except for the special
11015 case of .opd where the contents might be accessed
11016 before relocation. Choose zero, as that won't
11017 cause reloc overflow. */
11018 relocation = 0;
11019 addend = 0;
11020 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11021 to improve backward compatibility with older
11022 versions of ld. */
11023 if (r_type == R_PPC64_ADDR64)
11024 addend = outrel.r_addend;
11025 /* Adjust pc_relative relocs to have zero in *r_offset. */
11026 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11027 addend = (input_section->output_section->vma
11028 + input_section->output_offset
11029 + rel->r_offset);
11030 }
11031 }
11032 break;
11033
11034 case R_PPC64_COPY:
11035 case R_PPC64_GLOB_DAT:
11036 case R_PPC64_JMP_SLOT:
11037 case R_PPC64_RELATIVE:
11038 /* We shouldn't ever see these dynamic relocs in relocatable
11039 files. */
11040 /* Fall through. */
11041
11042 case R_PPC64_PLTGOT16:
11043 case R_PPC64_PLTGOT16_DS:
11044 case R_PPC64_PLTGOT16_HA:
11045 case R_PPC64_PLTGOT16_HI:
11046 case R_PPC64_PLTGOT16_LO:
11047 case R_PPC64_PLTGOT16_LO_DS:
11048 case R_PPC64_PLTREL32:
11049 case R_PPC64_PLTREL64:
11050 /* These ones haven't been implemented yet. */
11051
11052 (*_bfd_error_handler)
11053 (_("%B: relocation %s is not supported for symbol %s."),
11054 input_bfd,
11055 ppc64_elf_howto_table[r_type]->name, sym_name);
11056
11057 bfd_set_error (bfd_error_invalid_operation);
11058 ret = FALSE;
11059 continue;
11060 }
11061
11062 /* Do any further special processing. */
11063 switch (r_type)
11064 {
11065 default:
11066 break;
11067
11068 case R_PPC64_ADDR16_HA:
11069 case R_PPC64_ADDR16_HIGHERA:
11070 case R_PPC64_ADDR16_HIGHESTA:
11071 case R_PPC64_TOC16_HA:
11072 case R_PPC64_SECTOFF_HA:
11073 case R_PPC64_TPREL16_HA:
11074 case R_PPC64_DTPREL16_HA:
11075 case R_PPC64_TPREL16_HIGHER:
11076 case R_PPC64_TPREL16_HIGHERA:
11077 case R_PPC64_TPREL16_HIGHEST:
11078 case R_PPC64_TPREL16_HIGHESTA:
11079 case R_PPC64_DTPREL16_HIGHER:
11080 case R_PPC64_DTPREL16_HIGHERA:
11081 case R_PPC64_DTPREL16_HIGHEST:
11082 case R_PPC64_DTPREL16_HIGHESTA:
11083 /* It's just possible that this symbol is a weak symbol
11084 that's not actually defined anywhere. In that case,
11085 'sec' would be NULL, and we should leave the symbol
11086 alone (it will be set to zero elsewhere in the link). */
11087 if (sec == NULL)
11088 break;
11089 /* Fall thru */
11090
11091 case R_PPC64_GOT16_HA:
11092 case R_PPC64_PLTGOT16_HA:
11093 case R_PPC64_PLT16_HA:
11094 case R_PPC64_GOT_TLSGD16_HA:
11095 case R_PPC64_GOT_TLSLD16_HA:
11096 case R_PPC64_GOT_TPREL16_HA:
11097 case R_PPC64_GOT_DTPREL16_HA:
11098 /* Add 0x10000 if sign bit in 0:15 is set.
11099 Bits 0:15 are not used. */
11100 addend += 0x8000;
11101 break;
11102
11103 case R_PPC64_ADDR16_DS:
11104 case R_PPC64_ADDR16_LO_DS:
11105 case R_PPC64_GOT16_DS:
11106 case R_PPC64_GOT16_LO_DS:
11107 case R_PPC64_PLT16_LO_DS:
11108 case R_PPC64_SECTOFF_DS:
11109 case R_PPC64_SECTOFF_LO_DS:
11110 case R_PPC64_TOC16_DS:
11111 case R_PPC64_TOC16_LO_DS:
11112 case R_PPC64_PLTGOT16_DS:
11113 case R_PPC64_PLTGOT16_LO_DS:
11114 case R_PPC64_GOT_TPREL16_DS:
11115 case R_PPC64_GOT_TPREL16_LO_DS:
11116 case R_PPC64_GOT_DTPREL16_DS:
11117 case R_PPC64_GOT_DTPREL16_LO_DS:
11118 case R_PPC64_TPREL16_DS:
11119 case R_PPC64_TPREL16_LO_DS:
11120 case R_PPC64_DTPREL16_DS:
11121 case R_PPC64_DTPREL16_LO_DS:
11122 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11123 mask = 3;
11124 /* If this reloc is against an lq insn, then the value must be
11125 a multiple of 16. This is somewhat of a hack, but the
11126 "correct" way to do this by defining _DQ forms of all the
11127 _DS relocs bloats all reloc switches in this file. It
11128 doesn't seem to make much sense to use any of these relocs
11129 in data, so testing the insn should be safe. */
11130 if ((insn & (0x3f << 26)) == (56u << 26))
11131 mask = 15;
11132 if (((relocation + addend) & mask) != 0)
11133 {
11134 (*_bfd_error_handler)
11135 (_("%B: error: relocation %s not a multiple of %d"),
11136 input_bfd,
11137 ppc64_elf_howto_table[r_type]->name,
11138 mask + 1);
11139 bfd_set_error (bfd_error_bad_value);
11140 ret = FALSE;
11141 continue;
11142 }
11143 break;
11144 }
11145
11146 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11147 because such sections are not SEC_ALLOC and thus ld.so will
11148 not process them. */
11149 if (unresolved_reloc
11150 && !((input_section->flags & SEC_DEBUGGING) != 0
11151 && h->elf.def_dynamic))
11152 {
11153 (*_bfd_error_handler)
11154 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11155 input_bfd,
11156 input_section,
11157 (long) rel->r_offset,
11158 ppc64_elf_howto_table[(int) r_type]->name,
11159 h->elf.root.root.string);
11160 ret = FALSE;
11161 }
11162
11163 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11164 input_bfd,
11165 input_section,
11166 contents,
11167 rel->r_offset,
11168 relocation,
11169 addend);
11170
11171 if (r != bfd_reloc_ok)
11172 {
11173 if (sym_name == NULL)
11174 sym_name = "(null)";
11175 if (r == bfd_reloc_overflow)
11176 {
11177 if (warned)
11178 continue;
11179 if (h != NULL
11180 && h->elf.root.type == bfd_link_hash_undefweak
11181 && ppc64_elf_howto_table[r_type]->pc_relative)
11182 {
11183 /* Assume this is a call protected by other code that
11184 detects the symbol is undefined. If this is the case,
11185 we can safely ignore the overflow. If not, the
11186 program is hosed anyway, and a little warning isn't
11187 going to help. */
11188
11189 continue;
11190 }
11191
11192 if (!((*info->callbacks->reloc_overflow)
11193 (info, (h ? &h->elf.root : NULL), sym_name,
11194 ppc64_elf_howto_table[r_type]->name,
11195 orig_addend, input_bfd, input_section, rel->r_offset)))
11196 return FALSE;
11197 }
11198 else
11199 {
11200 (*_bfd_error_handler)
11201 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11202 input_bfd,
11203 input_section,
11204 (long) rel->r_offset,
11205 ppc64_elf_howto_table[r_type]->name,
11206 sym_name,
11207 (int) r);
11208 ret = FALSE;
11209 }
11210 }
11211 }
11212
11213 /* If we're emitting relocations, then shortly after this function
11214 returns, reloc offsets and addends for this section will be
11215 adjusted. Worse, reloc symbol indices will be for the output
11216 file rather than the input. Save a copy of the relocs for
11217 opd_entry_value. */
11218 if (is_opd && (info->emitrelocations || info->relocatable))
11219 {
11220 bfd_size_type amt;
11221 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11222 rel = bfd_alloc (input_bfd, amt);
11223 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11224 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11225 if (rel == NULL)
11226 return FALSE;
11227 memcpy (rel, relocs, amt);
11228 }
11229 return ret;
11230 }
11231
11232 /* Adjust the value of any local symbols in opd sections. */
11233
11234 static bfd_boolean
11235 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11236 const char *name ATTRIBUTE_UNUSED,
11237 Elf_Internal_Sym *elfsym,
11238 asection *input_sec,
11239 struct elf_link_hash_entry *h)
11240 {
11241 long *opd_adjust, adjust;
11242 bfd_vma value;
11243
11244 if (h != NULL)
11245 return TRUE;
11246
11247 opd_adjust = get_opd_info (input_sec);
11248 if (opd_adjust == NULL)
11249 return TRUE;
11250
11251 value = elfsym->st_value - input_sec->output_offset;
11252 if (!info->relocatable)
11253 value -= input_sec->output_section->vma;
11254
11255 adjust = opd_adjust[value / 8];
11256 if (adjust == -1)
11257 elfsym->st_value = 0;
11258 else
11259 elfsym->st_value += adjust;
11260 return TRUE;
11261 }
11262
11263 /* Finish up dynamic symbol handling. We set the contents of various
11264 dynamic sections here. */
11265
11266 static bfd_boolean
11267 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11268 struct bfd_link_info *info,
11269 struct elf_link_hash_entry *h,
11270 Elf_Internal_Sym *sym)
11271 {
11272 struct ppc_link_hash_table *htab;
11273 struct plt_entry *ent;
11274 Elf_Internal_Rela rela;
11275 bfd_byte *loc;
11276
11277 htab = ppc_hash_table (info);
11278
11279 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11280 if (ent->plt.offset != (bfd_vma) -1)
11281 {
11282 /* This symbol has an entry in the procedure linkage
11283 table. Set it up. */
11284
11285 if (htab->plt == NULL
11286 || htab->relplt == NULL
11287 || htab->glink == NULL)
11288 abort ();
11289
11290 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11291 fill in the PLT entry. */
11292 rela.r_offset = (htab->plt->output_section->vma
11293 + htab->plt->output_offset
11294 + ent->plt.offset);
11295 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11296 rela.r_addend = ent->addend;
11297
11298 loc = htab->relplt->contents;
11299 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11300 * sizeof (Elf64_External_Rela));
11301 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11302 }
11303
11304 if (h->needs_copy)
11305 {
11306 Elf_Internal_Rela rela;
11307 bfd_byte *loc;
11308
11309 /* This symbol needs a copy reloc. Set it up. */
11310
11311 if (h->dynindx == -1
11312 || (h->root.type != bfd_link_hash_defined
11313 && h->root.type != bfd_link_hash_defweak)
11314 || htab->relbss == NULL)
11315 abort ();
11316
11317 rela.r_offset = (h->root.u.def.value
11318 + h->root.u.def.section->output_section->vma
11319 + h->root.u.def.section->output_offset);
11320 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11321 rela.r_addend = 0;
11322 loc = htab->relbss->contents;
11323 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11324 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11325 }
11326
11327 /* Mark some specially defined symbols as absolute. */
11328 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11329 sym->st_shndx = SHN_ABS;
11330
11331 return TRUE;
11332 }
11333
11334 /* Used to decide how to sort relocs in an optimal manner for the
11335 dynamic linker, before writing them out. */
11336
11337 static enum elf_reloc_type_class
11338 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11339 {
11340 enum elf_ppc64_reloc_type r_type;
11341
11342 r_type = ELF64_R_TYPE (rela->r_info);
11343 switch (r_type)
11344 {
11345 case R_PPC64_RELATIVE:
11346 return reloc_class_relative;
11347 case R_PPC64_JMP_SLOT:
11348 return reloc_class_plt;
11349 case R_PPC64_COPY:
11350 return reloc_class_copy;
11351 default:
11352 return reloc_class_normal;
11353 }
11354 }
11355
11356 /* Finish up the dynamic sections. */
11357
11358 static bfd_boolean
11359 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11360 struct bfd_link_info *info)
11361 {
11362 struct ppc_link_hash_table *htab;
11363 bfd *dynobj;
11364 asection *sdyn;
11365
11366 htab = ppc_hash_table (info);
11367 dynobj = htab->elf.dynobj;
11368 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11369
11370 if (htab->elf.dynamic_sections_created)
11371 {
11372 Elf64_External_Dyn *dyncon, *dynconend;
11373
11374 if (sdyn == NULL || htab->got == NULL)
11375 abort ();
11376
11377 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11378 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11379 for (; dyncon < dynconend; dyncon++)
11380 {
11381 Elf_Internal_Dyn dyn;
11382 asection *s;
11383
11384 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11385
11386 switch (dyn.d_tag)
11387 {
11388 default:
11389 continue;
11390
11391 case DT_PPC64_GLINK:
11392 s = htab->glink;
11393 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11394 /* We stupidly defined DT_PPC64_GLINK to be the start
11395 of glink rather than the first entry point, which is
11396 what ld.so needs, and now have a bigger stub to
11397 support automatic multiple TOCs. */
11398 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11399 break;
11400
11401 case DT_PPC64_OPD:
11402 s = bfd_get_section_by_name (output_bfd, ".opd");
11403 if (s == NULL)
11404 continue;
11405 dyn.d_un.d_ptr = s->vma;
11406 break;
11407
11408 case DT_PPC64_OPDSZ:
11409 s = bfd_get_section_by_name (output_bfd, ".opd");
11410 if (s == NULL)
11411 continue;
11412 dyn.d_un.d_val = s->size;
11413 break;
11414
11415 case DT_PLTGOT:
11416 s = htab->plt;
11417 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11418 break;
11419
11420 case DT_JMPREL:
11421 s = htab->relplt;
11422 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11423 break;
11424
11425 case DT_PLTRELSZ:
11426 dyn.d_un.d_val = htab->relplt->size;
11427 break;
11428
11429 case DT_RELASZ:
11430 /* Don't count procedure linkage table relocs in the
11431 overall reloc count. */
11432 s = htab->relplt;
11433 if (s == NULL)
11434 continue;
11435 dyn.d_un.d_val -= s->size;
11436 break;
11437
11438 case DT_RELA:
11439 /* We may not be using the standard ELF linker script.
11440 If .rela.plt is the first .rela section, we adjust
11441 DT_RELA to not include it. */
11442 s = htab->relplt;
11443 if (s == NULL)
11444 continue;
11445 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11446 continue;
11447 dyn.d_un.d_ptr += s->size;
11448 break;
11449 }
11450
11451 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11452 }
11453 }
11454
11455 if (htab->got != NULL && htab->got->size != 0)
11456 {
11457 /* Fill in the first entry in the global offset table.
11458 We use it to hold the link-time TOCbase. */
11459 bfd_put_64 (output_bfd,
11460 elf_gp (output_bfd) + TOC_BASE_OFF,
11461 htab->got->contents);
11462
11463 /* Set .got entry size. */
11464 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11465 }
11466
11467 if (htab->plt != NULL && htab->plt->size != 0)
11468 {
11469 /* Set .plt entry size. */
11470 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11471 = PLT_ENTRY_SIZE;
11472 }
11473
11474 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11475 brlt ourselves if emitrelocations. */
11476 if (htab->brlt != NULL
11477 && htab->brlt->reloc_count != 0
11478 && !_bfd_elf_link_output_relocs (output_bfd,
11479 htab->brlt,
11480 &elf_section_data (htab->brlt)->rel_hdr,
11481 elf_section_data (htab->brlt)->relocs,
11482 NULL))
11483 return FALSE;
11484
11485 /* We need to handle writing out multiple GOT sections ourselves,
11486 since we didn't add them to DYNOBJ. We know dynobj is the first
11487 bfd. */
11488 while ((dynobj = dynobj->link_next) != NULL)
11489 {
11490 asection *s;
11491
11492 if (!is_ppc64_elf_target (dynobj->xvec))
11493 continue;
11494
11495 s = ppc64_elf_tdata (dynobj)->got;
11496 if (s != NULL
11497 && s->size != 0
11498 && s->output_section != bfd_abs_section_ptr
11499 && !bfd_set_section_contents (output_bfd, s->output_section,
11500 s->contents, s->output_offset,
11501 s->size))
11502 return FALSE;
11503 s = ppc64_elf_tdata (dynobj)->relgot;
11504 if (s != NULL
11505 && s->size != 0
11506 && s->output_section != bfd_abs_section_ptr
11507 && !bfd_set_section_contents (output_bfd, s->output_section,
11508 s->contents, s->output_offset,
11509 s->size))
11510 return FALSE;
11511 }
11512
11513 return TRUE;
11514 }
11515
11516 #include "elf64-target.h"
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