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PR linker/5099
[deliverable/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 3 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
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_check_directives
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
100 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
101 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
102 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
103 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
104 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
105 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
106 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
107 #define elf_backend_action_discarded ppc64_elf_action_discarded
108 #define elf_backend_relocate_section ppc64_elf_relocate_section
109 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
110 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
111 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
112 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
113 #define elf_backend_special_sections ppc64_elf_special_sections
114
115 /* The name of the dynamic interpreter. This is put in the .interp
116 section. */
117 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
118
119 /* The size in bytes of an entry in the procedure linkage table. */
120 #define PLT_ENTRY_SIZE 24
121
122 /* The initial size of the plt reserved for the dynamic linker. */
123 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
124
125 /* TOC base pointers offset from start of TOC. */
126 #define TOC_BASE_OFF 0x8000
127
128 /* Offset of tp and dtp pointers from start of TLS block. */
129 #define TP_OFFSET 0x7000
130 #define DTP_OFFSET 0x8000
131
132 /* .plt call stub instructions. The normal stub is like this, but
133 sometimes the .plt entry crosses a 64k boundary and we need to
134 insert an addi to adjust r12. */
135 #define PLT_CALL_STUB_SIZE (7*4)
136 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
137 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
138 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
139 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
140 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
141 /* ld %r11,xxx+16@l(%r12) */
142 #define BCTR 0x4e800420 /* bctr */
143
144
145 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
146 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
147 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
148 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
149
150 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
151 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
152
153 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
154
155 /* glink call stub instructions. We enter with the index in R0. */
156 #define GLINK_CALL_STUB_SIZE (16*4)
157 /* 0: */
158 /* .quad plt0-1f */
159 /* __glink: */
160 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
161 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
162 /* 1: */
163 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
164 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
165 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
166 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
167 /* ld %11,0(%12) */
168 /* ld %2,8(%12) */
169 /* mtctr %11 */
170 /* ld %11,16(%12) */
171 /* bctr */
172
173 /* Pad with this. */
174 #define NOP 0x60000000
175
176 /* Some other nops. */
177 #define CROR_151515 0x4def7b82
178 #define CROR_313131 0x4ffffb82
179
180 /* .glink entries for the first 32k functions are two instructions. */
181 #define LI_R0_0 0x38000000 /* li %r0,0 */
182 #define B_DOT 0x48000000 /* b . */
183
184 /* After that, we need two instructions to load the index, followed by
185 a branch. */
186 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
187 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
188
189 /* Instructions used by the save and restore reg functions. */
190 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
191 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
192 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
193 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
194 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
195 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
196 #define LI_R12_0 0x39800000 /* li %r12,0 */
197 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
198 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
199 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
200 #define BLR 0x4e800020 /* blr */
201
202 /* Since .opd is an array of descriptors and each entry will end up
203 with identical R_PPC64_RELATIVE relocs, there is really no need to
204 propagate .opd relocs; The dynamic linker should be taught to
205 relocate .opd without reloc entries. */
206 #ifndef NO_OPD_RELOCS
207 #define NO_OPD_RELOCS 0
208 #endif
209 \f
210 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
211
212 /* Relocation HOWTO's. */
213 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
214
215 static reloc_howto_type ppc64_elf_howto_raw[] = {
216 /* This reloc does nothing. */
217 HOWTO (R_PPC64_NONE, /* type */
218 0, /* rightshift */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
220 32, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_dont, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC64_NONE", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A standard 32 bit relocation. */
232 HOWTO (R_PPC64_ADDR32, /* type */
233 0, /* rightshift */
234 2, /* size (0 = byte, 1 = short, 2 = long) */
235 32, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_bitfield, /* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC64_ADDR32", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffffffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* An absolute 26 bit branch; the lower two bits must be zero.
247 FIXME: we don't check that, we just clear them. */
248 HOWTO (R_PPC64_ADDR24, /* type */
249 0, /* rightshift */
250 2, /* size (0 = byte, 1 = short, 2 = long) */
251 26, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_bitfield, /* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC64_ADDR24", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0x03fffffc, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* A standard 16 bit relocation. */
263 HOWTO (R_PPC64_ADDR16, /* type */
264 0, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_bitfield, /* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_PPC64_ADDR16", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* A 16 bit relocation without overflow. */
278 HOWTO (R_PPC64_ADDR16_LO, /* type */
279 0, /* rightshift */
280 1, /* size (0 = byte, 1 = short, 2 = long) */
281 16, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_dont,/* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_PPC64_ADDR16_LO", /* name */
287 FALSE, /* partial_inplace */
288 0, /* src_mask */
289 0xffff, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* Bits 16-31 of an address. */
293 HOWTO (R_PPC64_ADDR16_HI, /* type */
294 16, /* rightshift */
295 1, /* size (0 = byte, 1 = short, 2 = long) */
296 16, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_dont, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_PPC64_ADDR16_HI", /* name */
302 FALSE, /* partial_inplace */
303 0, /* src_mask */
304 0xffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
308 bits, treated as a signed number, is negative. */
309 HOWTO (R_PPC64_ADDR16_HA, /* type */
310 16, /* rightshift */
311 1, /* size (0 = byte, 1 = short, 2 = long) */
312 16, /* bitsize */
313 FALSE, /* pc_relative */
314 0, /* bitpos */
315 complain_overflow_dont, /* complain_on_overflow */
316 ppc64_elf_ha_reloc, /* special_function */
317 "R_PPC64_ADDR16_HA", /* name */
318 FALSE, /* partial_inplace */
319 0, /* src_mask */
320 0xffff, /* dst_mask */
321 FALSE), /* pcrel_offset */
322
323 /* An absolute 16 bit branch; the lower two bits must be zero.
324 FIXME: we don't check that, we just clear them. */
325 HOWTO (R_PPC64_ADDR14, /* type */
326 0, /* rightshift */
327 2, /* size (0 = byte, 1 = short, 2 = long) */
328 16, /* bitsize */
329 FALSE, /* pc_relative */
330 0, /* bitpos */
331 complain_overflow_bitfield, /* complain_on_overflow */
332 ppc64_elf_branch_reloc, /* special_function */
333 "R_PPC64_ADDR14", /* name */
334 FALSE, /* partial_inplace */
335 0, /* src_mask */
336 0x0000fffc, /* dst_mask */
337 FALSE), /* pcrel_offset */
338
339 /* An absolute 16 bit branch, for which bit 10 should be set to
340 indicate that the branch is expected to be taken. The lower two
341 bits must be zero. */
342 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
343 0, /* rightshift */
344 2, /* size (0 = byte, 1 = short, 2 = long) */
345 16, /* bitsize */
346 FALSE, /* pc_relative */
347 0, /* bitpos */
348 complain_overflow_bitfield, /* complain_on_overflow */
349 ppc64_elf_brtaken_reloc, /* special_function */
350 "R_PPC64_ADDR14_BRTAKEN",/* name */
351 FALSE, /* partial_inplace */
352 0, /* src_mask */
353 0x0000fffc, /* dst_mask */
354 FALSE), /* pcrel_offset */
355
356 /* An absolute 16 bit branch, for which bit 10 should be set to
357 indicate that the branch is not expected to be taken. The lower
358 two bits must be zero. */
359 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 FALSE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_bitfield, /* complain_on_overflow */
366 ppc64_elf_brtaken_reloc, /* special_function */
367 "R_PPC64_ADDR14_BRNTAKEN",/* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0x0000fffc, /* dst_mask */
371 FALSE), /* pcrel_offset */
372
373 /* A relative 26 bit branch; the lower two bits must be zero. */
374 HOWTO (R_PPC64_REL24, /* type */
375 0, /* rightshift */
376 2, /* size (0 = byte, 1 = short, 2 = long) */
377 26, /* bitsize */
378 TRUE, /* pc_relative */
379 0, /* bitpos */
380 complain_overflow_signed, /* complain_on_overflow */
381 ppc64_elf_branch_reloc, /* special_function */
382 "R_PPC64_REL24", /* name */
383 FALSE, /* partial_inplace */
384 0, /* src_mask */
385 0x03fffffc, /* dst_mask */
386 TRUE), /* pcrel_offset */
387
388 /* A relative 16 bit branch; the lower two bits must be zero. */
389 HOWTO (R_PPC64_REL14, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 16, /* bitsize */
393 TRUE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_signed, /* complain_on_overflow */
396 ppc64_elf_branch_reloc, /* special_function */
397 "R_PPC64_REL14", /* name */
398 FALSE, /* partial_inplace */
399 0, /* src_mask */
400 0x0000fffc, /* dst_mask */
401 TRUE), /* pcrel_offset */
402
403 /* A relative 16 bit branch. Bit 10 should be set to indicate that
404 the branch is expected to be taken. The lower two bits must be
405 zero. */
406 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
407 0, /* rightshift */
408 2, /* size (0 = byte, 1 = short, 2 = long) */
409 16, /* bitsize */
410 TRUE, /* pc_relative */
411 0, /* bitpos */
412 complain_overflow_signed, /* complain_on_overflow */
413 ppc64_elf_brtaken_reloc, /* special_function */
414 "R_PPC64_REL14_BRTAKEN", /* name */
415 FALSE, /* partial_inplace */
416 0, /* src_mask */
417 0x0000fffc, /* dst_mask */
418 TRUE), /* pcrel_offset */
419
420 /* A relative 16 bit branch. Bit 10 should be set to indicate that
421 the branch is not expected to be taken. The lower two bits must
422 be zero. */
423 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 16, /* bitsize */
427 TRUE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_signed, /* complain_on_overflow */
430 ppc64_elf_brtaken_reloc, /* special_function */
431 "R_PPC64_REL14_BRNTAKEN",/* name */
432 FALSE, /* partial_inplace */
433 0, /* src_mask */
434 0x0000fffc, /* dst_mask */
435 TRUE), /* pcrel_offset */
436
437 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
438 symbol. */
439 HOWTO (R_PPC64_GOT16, /* type */
440 0, /* rightshift */
441 1, /* size (0 = byte, 1 = short, 2 = long) */
442 16, /* bitsize */
443 FALSE, /* pc_relative */
444 0, /* bitpos */
445 complain_overflow_signed, /* complain_on_overflow */
446 ppc64_elf_unhandled_reloc, /* special_function */
447 "R_PPC64_GOT16", /* name */
448 FALSE, /* partial_inplace */
449 0, /* src_mask */
450 0xffff, /* dst_mask */
451 FALSE), /* pcrel_offset */
452
453 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
454 the symbol. */
455 HOWTO (R_PPC64_GOT16_LO, /* type */
456 0, /* rightshift */
457 1, /* size (0 = byte, 1 = short, 2 = long) */
458 16, /* bitsize */
459 FALSE, /* pc_relative */
460 0, /* bitpos */
461 complain_overflow_dont, /* complain_on_overflow */
462 ppc64_elf_unhandled_reloc, /* special_function */
463 "R_PPC64_GOT16_LO", /* name */
464 FALSE, /* partial_inplace */
465 0, /* src_mask */
466 0xffff, /* dst_mask */
467 FALSE), /* pcrel_offset */
468
469 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
470 the symbol. */
471 HOWTO (R_PPC64_GOT16_HI, /* type */
472 16, /* rightshift */
473 1, /* size (0 = byte, 1 = short, 2 = long) */
474 16, /* bitsize */
475 FALSE, /* pc_relative */
476 0, /* bitpos */
477 complain_overflow_dont,/* complain_on_overflow */
478 ppc64_elf_unhandled_reloc, /* special_function */
479 "R_PPC64_GOT16_HI", /* name */
480 FALSE, /* partial_inplace */
481 0, /* src_mask */
482 0xffff, /* dst_mask */
483 FALSE), /* pcrel_offset */
484
485 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
486 the symbol. */
487 HOWTO (R_PPC64_GOT16_HA, /* type */
488 16, /* rightshift */
489 1, /* size (0 = byte, 1 = short, 2 = long) */
490 16, /* bitsize */
491 FALSE, /* pc_relative */
492 0, /* bitpos */
493 complain_overflow_dont,/* complain_on_overflow */
494 ppc64_elf_unhandled_reloc, /* special_function */
495 "R_PPC64_GOT16_HA", /* name */
496 FALSE, /* partial_inplace */
497 0, /* src_mask */
498 0xffff, /* dst_mask */
499 FALSE), /* pcrel_offset */
500
501 /* This is used only by the dynamic linker. The symbol should exist
502 both in the object being run and in some shared library. The
503 dynamic linker copies the data addressed by the symbol from the
504 shared library into the object, because the object being
505 run has to have the data at some particular address. */
506 HOWTO (R_PPC64_COPY, /* type */
507 0, /* rightshift */
508 0, /* this one is variable size */
509 0, /* bitsize */
510 FALSE, /* pc_relative */
511 0, /* bitpos */
512 complain_overflow_dont, /* complain_on_overflow */
513 ppc64_elf_unhandled_reloc, /* special_function */
514 "R_PPC64_COPY", /* name */
515 FALSE, /* partial_inplace */
516 0, /* src_mask */
517 0, /* dst_mask */
518 FALSE), /* pcrel_offset */
519
520 /* Like R_PPC64_ADDR64, but used when setting global offset table
521 entries. */
522 HOWTO (R_PPC64_GLOB_DAT, /* type */
523 0, /* rightshift */
524 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
525 64, /* bitsize */
526 FALSE, /* pc_relative */
527 0, /* bitpos */
528 complain_overflow_dont, /* complain_on_overflow */
529 ppc64_elf_unhandled_reloc, /* special_function */
530 "R_PPC64_GLOB_DAT", /* name */
531 FALSE, /* partial_inplace */
532 0, /* src_mask */
533 ONES (64), /* dst_mask */
534 FALSE), /* pcrel_offset */
535
536 /* Created by the link editor. Marks a procedure linkage table
537 entry for a symbol. */
538 HOWTO (R_PPC64_JMP_SLOT, /* type */
539 0, /* rightshift */
540 0, /* size (0 = byte, 1 = short, 2 = long) */
541 0, /* bitsize */
542 FALSE, /* pc_relative */
543 0, /* bitpos */
544 complain_overflow_dont, /* complain_on_overflow */
545 ppc64_elf_unhandled_reloc, /* special_function */
546 "R_PPC64_JMP_SLOT", /* name */
547 FALSE, /* partial_inplace */
548 0, /* src_mask */
549 0, /* dst_mask */
550 FALSE), /* pcrel_offset */
551
552 /* Used only by the dynamic linker. When the object is run, this
553 doubleword64 is set to the load address of the object, plus the
554 addend. */
555 HOWTO (R_PPC64_RELATIVE, /* type */
556 0, /* rightshift */
557 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
558 64, /* bitsize */
559 FALSE, /* pc_relative */
560 0, /* bitpos */
561 complain_overflow_dont, /* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_PPC64_RELATIVE", /* name */
564 FALSE, /* partial_inplace */
565 0, /* src_mask */
566 ONES (64), /* dst_mask */
567 FALSE), /* pcrel_offset */
568
569 /* Like R_PPC64_ADDR32, but may be unaligned. */
570 HOWTO (R_PPC64_UADDR32, /* type */
571 0, /* rightshift */
572 2, /* size (0 = byte, 1 = short, 2 = long) */
573 32, /* bitsize */
574 FALSE, /* pc_relative */
575 0, /* bitpos */
576 complain_overflow_bitfield, /* complain_on_overflow */
577 bfd_elf_generic_reloc, /* special_function */
578 "R_PPC64_UADDR32", /* name */
579 FALSE, /* partial_inplace */
580 0, /* src_mask */
581 0xffffffff, /* dst_mask */
582 FALSE), /* pcrel_offset */
583
584 /* Like R_PPC64_ADDR16, but may be unaligned. */
585 HOWTO (R_PPC64_UADDR16, /* type */
586 0, /* rightshift */
587 1, /* size (0 = byte, 1 = short, 2 = long) */
588 16, /* bitsize */
589 FALSE, /* pc_relative */
590 0, /* bitpos */
591 complain_overflow_bitfield, /* complain_on_overflow */
592 bfd_elf_generic_reloc, /* special_function */
593 "R_PPC64_UADDR16", /* name */
594 FALSE, /* partial_inplace */
595 0, /* src_mask */
596 0xffff, /* dst_mask */
597 FALSE), /* pcrel_offset */
598
599 /* 32-bit PC relative. */
600 HOWTO (R_PPC64_REL32, /* type */
601 0, /* rightshift */
602 2, /* size (0 = byte, 1 = short, 2 = long) */
603 32, /* bitsize */
604 TRUE, /* pc_relative */
605 0, /* bitpos */
606 /* FIXME: Verify. Was complain_overflow_bitfield. */
607 complain_overflow_signed, /* complain_on_overflow */
608 bfd_elf_generic_reloc, /* special_function */
609 "R_PPC64_REL32", /* name */
610 FALSE, /* partial_inplace */
611 0, /* src_mask */
612 0xffffffff, /* dst_mask */
613 TRUE), /* pcrel_offset */
614
615 /* 32-bit relocation to the symbol's procedure linkage table. */
616 HOWTO (R_PPC64_PLT32, /* type */
617 0, /* rightshift */
618 2, /* size (0 = byte, 1 = short, 2 = long) */
619 32, /* bitsize */
620 FALSE, /* pc_relative */
621 0, /* bitpos */
622 complain_overflow_bitfield, /* complain_on_overflow */
623 ppc64_elf_unhandled_reloc, /* special_function */
624 "R_PPC64_PLT32", /* name */
625 FALSE, /* partial_inplace */
626 0, /* src_mask */
627 0xffffffff, /* dst_mask */
628 FALSE), /* pcrel_offset */
629
630 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
631 FIXME: R_PPC64_PLTREL32 not supported. */
632 HOWTO (R_PPC64_PLTREL32, /* type */
633 0, /* rightshift */
634 2, /* size (0 = byte, 1 = short, 2 = long) */
635 32, /* bitsize */
636 TRUE, /* pc_relative */
637 0, /* bitpos */
638 complain_overflow_signed, /* complain_on_overflow */
639 bfd_elf_generic_reloc, /* special_function */
640 "R_PPC64_PLTREL32", /* name */
641 FALSE, /* partial_inplace */
642 0, /* src_mask */
643 0xffffffff, /* dst_mask */
644 TRUE), /* pcrel_offset */
645
646 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
647 the symbol. */
648 HOWTO (R_PPC64_PLT16_LO, /* type */
649 0, /* rightshift */
650 1, /* size (0 = byte, 1 = short, 2 = long) */
651 16, /* bitsize */
652 FALSE, /* pc_relative */
653 0, /* bitpos */
654 complain_overflow_dont, /* complain_on_overflow */
655 ppc64_elf_unhandled_reloc, /* special_function */
656 "R_PPC64_PLT16_LO", /* name */
657 FALSE, /* partial_inplace */
658 0, /* src_mask */
659 0xffff, /* dst_mask */
660 FALSE), /* pcrel_offset */
661
662 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
663 the symbol. */
664 HOWTO (R_PPC64_PLT16_HI, /* type */
665 16, /* rightshift */
666 1, /* size (0 = byte, 1 = short, 2 = long) */
667 16, /* bitsize */
668 FALSE, /* pc_relative */
669 0, /* bitpos */
670 complain_overflow_dont, /* complain_on_overflow */
671 ppc64_elf_unhandled_reloc, /* special_function */
672 "R_PPC64_PLT16_HI", /* name */
673 FALSE, /* partial_inplace */
674 0, /* src_mask */
675 0xffff, /* dst_mask */
676 FALSE), /* pcrel_offset */
677
678 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
679 the symbol. */
680 HOWTO (R_PPC64_PLT16_HA, /* type */
681 16, /* rightshift */
682 1, /* size (0 = byte, 1 = short, 2 = long) */
683 16, /* bitsize */
684 FALSE, /* pc_relative */
685 0, /* bitpos */
686 complain_overflow_dont, /* complain_on_overflow */
687 ppc64_elf_unhandled_reloc, /* special_function */
688 "R_PPC64_PLT16_HA", /* name */
689 FALSE, /* partial_inplace */
690 0, /* src_mask */
691 0xffff, /* dst_mask */
692 FALSE), /* pcrel_offset */
693
694 /* 16-bit section relative relocation. */
695 HOWTO (R_PPC64_SECTOFF, /* type */
696 0, /* rightshift */
697 1, /* size (0 = byte, 1 = short, 2 = long) */
698 16, /* bitsize */
699 FALSE, /* pc_relative */
700 0, /* bitpos */
701 complain_overflow_bitfield, /* complain_on_overflow */
702 ppc64_elf_sectoff_reloc, /* special_function */
703 "R_PPC64_SECTOFF", /* name */
704 FALSE, /* partial_inplace */
705 0, /* src_mask */
706 0xffff, /* dst_mask */
707 FALSE), /* pcrel_offset */
708
709 /* Like R_PPC64_SECTOFF, but no overflow warning. */
710 HOWTO (R_PPC64_SECTOFF_LO, /* type */
711 0, /* rightshift */
712 1, /* size (0 = byte, 1 = short, 2 = long) */
713 16, /* bitsize */
714 FALSE, /* pc_relative */
715 0, /* bitpos */
716 complain_overflow_dont, /* complain_on_overflow */
717 ppc64_elf_sectoff_reloc, /* special_function */
718 "R_PPC64_SECTOFF_LO", /* name */
719 FALSE, /* partial_inplace */
720 0, /* src_mask */
721 0xffff, /* dst_mask */
722 FALSE), /* pcrel_offset */
723
724 /* 16-bit upper half section relative relocation. */
725 HOWTO (R_PPC64_SECTOFF_HI, /* type */
726 16, /* rightshift */
727 1, /* size (0 = byte, 1 = short, 2 = long) */
728 16, /* bitsize */
729 FALSE, /* pc_relative */
730 0, /* bitpos */
731 complain_overflow_dont, /* complain_on_overflow */
732 ppc64_elf_sectoff_reloc, /* special_function */
733 "R_PPC64_SECTOFF_HI", /* name */
734 FALSE, /* partial_inplace */
735 0, /* src_mask */
736 0xffff, /* dst_mask */
737 FALSE), /* pcrel_offset */
738
739 /* 16-bit upper half adjusted section relative relocation. */
740 HOWTO (R_PPC64_SECTOFF_HA, /* type */
741 16, /* rightshift */
742 1, /* size (0 = byte, 1 = short, 2 = long) */
743 16, /* bitsize */
744 FALSE, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_dont, /* complain_on_overflow */
747 ppc64_elf_sectoff_ha_reloc, /* special_function */
748 "R_PPC64_SECTOFF_HA", /* name */
749 FALSE, /* partial_inplace */
750 0, /* src_mask */
751 0xffff, /* dst_mask */
752 FALSE), /* pcrel_offset */
753
754 /* Like R_PPC64_REL24 without touching the two least significant bits. */
755 HOWTO (R_PPC64_REL30, /* type */
756 2, /* rightshift */
757 2, /* size (0 = byte, 1 = short, 2 = long) */
758 30, /* bitsize */
759 TRUE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_dont, /* complain_on_overflow */
762 bfd_elf_generic_reloc, /* special_function */
763 "R_PPC64_REL30", /* name */
764 FALSE, /* partial_inplace */
765 0, /* src_mask */
766 0xfffffffc, /* dst_mask */
767 TRUE), /* pcrel_offset */
768
769 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
770
771 /* A standard 64-bit relocation. */
772 HOWTO (R_PPC64_ADDR64, /* type */
773 0, /* rightshift */
774 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
775 64, /* bitsize */
776 FALSE, /* pc_relative */
777 0, /* bitpos */
778 complain_overflow_dont, /* complain_on_overflow */
779 bfd_elf_generic_reloc, /* special_function */
780 "R_PPC64_ADDR64", /* name */
781 FALSE, /* partial_inplace */
782 0, /* src_mask */
783 ONES (64), /* dst_mask */
784 FALSE), /* pcrel_offset */
785
786 /* The bits 32-47 of an address. */
787 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
788 32, /* rightshift */
789 1, /* size (0 = byte, 1 = short, 2 = long) */
790 16, /* bitsize */
791 FALSE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_dont, /* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_PPC64_ADDR16_HIGHER", /* name */
796 FALSE, /* partial_inplace */
797 0, /* src_mask */
798 0xffff, /* dst_mask */
799 FALSE), /* pcrel_offset */
800
801 /* The bits 32-47 of an address, plus 1 if the contents of the low
802 16 bits, treated as a signed number, is negative. */
803 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
804 32, /* rightshift */
805 1, /* size (0 = byte, 1 = short, 2 = long) */
806 16, /* bitsize */
807 FALSE, /* pc_relative */
808 0, /* bitpos */
809 complain_overflow_dont, /* complain_on_overflow */
810 ppc64_elf_ha_reloc, /* special_function */
811 "R_PPC64_ADDR16_HIGHERA", /* name */
812 FALSE, /* partial_inplace */
813 0, /* src_mask */
814 0xffff, /* dst_mask */
815 FALSE), /* pcrel_offset */
816
817 /* The bits 48-63 of an address. */
818 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
819 48, /* rightshift */
820 1, /* size (0 = byte, 1 = short, 2 = long) */
821 16, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 bfd_elf_generic_reloc, /* special_function */
826 "R_PPC64_ADDR16_HIGHEST", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* The bits 48-63 of an address, plus 1 if the contents of the low
833 16 bits, treated as a signed number, is negative. */
834 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
835 48, /* rightshift */
836 1, /* size (0 = byte, 1 = short, 2 = long) */
837 16, /* bitsize */
838 FALSE, /* pc_relative */
839 0, /* bitpos */
840 complain_overflow_dont, /* complain_on_overflow */
841 ppc64_elf_ha_reloc, /* special_function */
842 "R_PPC64_ADDR16_HIGHESTA", /* name */
843 FALSE, /* partial_inplace */
844 0, /* src_mask */
845 0xffff, /* dst_mask */
846 FALSE), /* pcrel_offset */
847
848 /* Like ADDR64, but may be unaligned. */
849 HOWTO (R_PPC64_UADDR64, /* type */
850 0, /* rightshift */
851 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
852 64, /* bitsize */
853 FALSE, /* pc_relative */
854 0, /* bitpos */
855 complain_overflow_dont, /* complain_on_overflow */
856 bfd_elf_generic_reloc, /* special_function */
857 "R_PPC64_UADDR64", /* name */
858 FALSE, /* partial_inplace */
859 0, /* src_mask */
860 ONES (64), /* dst_mask */
861 FALSE), /* pcrel_offset */
862
863 /* 64-bit relative relocation. */
864 HOWTO (R_PPC64_REL64, /* type */
865 0, /* rightshift */
866 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
867 64, /* bitsize */
868 TRUE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 bfd_elf_generic_reloc, /* special_function */
872 "R_PPC64_REL64", /* name */
873 FALSE, /* partial_inplace */
874 0, /* src_mask */
875 ONES (64), /* dst_mask */
876 TRUE), /* pcrel_offset */
877
878 /* 64-bit relocation to the symbol's procedure linkage table. */
879 HOWTO (R_PPC64_PLT64, /* type */
880 0, /* rightshift */
881 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
882 64, /* bitsize */
883 FALSE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont, /* complain_on_overflow */
886 ppc64_elf_unhandled_reloc, /* special_function */
887 "R_PPC64_PLT64", /* name */
888 FALSE, /* partial_inplace */
889 0, /* src_mask */
890 ONES (64), /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* 64-bit PC relative relocation to the symbol's procedure linkage
894 table. */
895 /* FIXME: R_PPC64_PLTREL64 not supported. */
896 HOWTO (R_PPC64_PLTREL64, /* type */
897 0, /* rightshift */
898 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
899 64, /* bitsize */
900 TRUE, /* pc_relative */
901 0, /* bitpos */
902 complain_overflow_dont, /* complain_on_overflow */
903 ppc64_elf_unhandled_reloc, /* special_function */
904 "R_PPC64_PLTREL64", /* name */
905 FALSE, /* partial_inplace */
906 0, /* src_mask */
907 ONES (64), /* dst_mask */
908 TRUE), /* pcrel_offset */
909
910 /* 16 bit TOC-relative relocation. */
911
912 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
913 HOWTO (R_PPC64_TOC16, /* type */
914 0, /* rightshift */
915 1, /* size (0 = byte, 1 = short, 2 = long) */
916 16, /* bitsize */
917 FALSE, /* pc_relative */
918 0, /* bitpos */
919 complain_overflow_signed, /* complain_on_overflow */
920 ppc64_elf_toc_reloc, /* special_function */
921 "R_PPC64_TOC16", /* name */
922 FALSE, /* partial_inplace */
923 0, /* src_mask */
924 0xffff, /* dst_mask */
925 FALSE), /* pcrel_offset */
926
927 /* 16 bit TOC-relative relocation without overflow. */
928
929 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
930 HOWTO (R_PPC64_TOC16_LO, /* type */
931 0, /* rightshift */
932 1, /* size (0 = byte, 1 = short, 2 = long) */
933 16, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_toc_reloc, /* special_function */
938 "R_PPC64_TOC16_LO", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 0xffff, /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 16 bit TOC-relative relocation, high 16 bits. */
945
946 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
947 HOWTO (R_PPC64_TOC16_HI, /* type */
948 16, /* rightshift */
949 1, /* size (0 = byte, 1 = short, 2 = long) */
950 16, /* bitsize */
951 FALSE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_toc_reloc, /* special_function */
955 "R_PPC64_TOC16_HI", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 0xffff, /* dst_mask */
959 FALSE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
962 contents of the low 16 bits, treated as a signed number, is
963 negative. */
964
965 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
966 HOWTO (R_PPC64_TOC16_HA, /* type */
967 16, /* rightshift */
968 1, /* size (0 = byte, 1 = short, 2 = long) */
969 16, /* bitsize */
970 FALSE, /* pc_relative */
971 0, /* bitpos */
972 complain_overflow_dont, /* complain_on_overflow */
973 ppc64_elf_toc_ha_reloc, /* special_function */
974 "R_PPC64_TOC16_HA", /* name */
975 FALSE, /* partial_inplace */
976 0, /* src_mask */
977 0xffff, /* dst_mask */
978 FALSE), /* pcrel_offset */
979
980 /* 64-bit relocation; insert value of TOC base (.TOC.). */
981
982 /* R_PPC64_TOC 51 doubleword64 .TOC. */
983 HOWTO (R_PPC64_TOC, /* type */
984 0, /* rightshift */
985 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
986 64, /* bitsize */
987 FALSE, /* pc_relative */
988 0, /* bitpos */
989 complain_overflow_bitfield, /* complain_on_overflow */
990 ppc64_elf_toc64_reloc, /* special_function */
991 "R_PPC64_TOC", /* name */
992 FALSE, /* partial_inplace */
993 0, /* src_mask */
994 ONES (64), /* dst_mask */
995 FALSE), /* pcrel_offset */
996
997 /* Like R_PPC64_GOT16, but also informs the link editor that the
998 value to relocate may (!) refer to a PLT entry which the link
999 editor (a) may replace with the symbol value. If the link editor
1000 is unable to fully resolve the symbol, it may (b) create a PLT
1001 entry and store the address to the new PLT entry in the GOT.
1002 This permits lazy resolution of function symbols at run time.
1003 The link editor may also skip all of this and just (c) emit a
1004 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1005 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1006 HOWTO (R_PPC64_PLTGOT16, /* type */
1007 0, /* rightshift */
1008 1, /* size (0 = byte, 1 = short, 2 = long) */
1009 16, /* bitsize */
1010 FALSE, /* pc_relative */
1011 0, /* bitpos */
1012 complain_overflow_signed, /* complain_on_overflow */
1013 ppc64_elf_unhandled_reloc, /* special_function */
1014 "R_PPC64_PLTGOT16", /* name */
1015 FALSE, /* partial_inplace */
1016 0, /* src_mask */
1017 0xffff, /* dst_mask */
1018 FALSE), /* pcrel_offset */
1019
1020 /* Like R_PPC64_PLTGOT16, but without overflow. */
1021 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1022 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1023 0, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_dont, /* complain_on_overflow */
1029 ppc64_elf_unhandled_reloc, /* special_function */
1030 "R_PPC64_PLTGOT16_LO", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1037 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1038 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1039 16, /* rightshift */
1040 1, /* size (0 = byte, 1 = short, 2 = long) */
1041 16, /* bitsize */
1042 FALSE, /* pc_relative */
1043 0, /* bitpos */
1044 complain_overflow_dont, /* complain_on_overflow */
1045 ppc64_elf_unhandled_reloc, /* special_function */
1046 "R_PPC64_PLTGOT16_HI", /* name */
1047 FALSE, /* partial_inplace */
1048 0, /* src_mask */
1049 0xffff, /* dst_mask */
1050 FALSE), /* pcrel_offset */
1051
1052 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1053 1 if the contents of the low 16 bits, treated as a signed number,
1054 is negative. */
1055 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1056 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1057 16, /* rightshift */
1058 1, /* size (0 = byte, 1 = short, 2 = long) */
1059 16, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont,/* complain_on_overflow */
1063 ppc64_elf_unhandled_reloc, /* special_function */
1064 "R_PPC64_PLTGOT16_HA", /* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0xffff, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1071 HOWTO (R_PPC64_ADDR16_DS, /* type */
1072 0, /* rightshift */
1073 1, /* size (0 = byte, 1 = short, 2 = long) */
1074 16, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_bitfield, /* complain_on_overflow */
1078 bfd_elf_generic_reloc, /* special_function */
1079 "R_PPC64_ADDR16_DS", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0xfffc, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1086 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1087 0, /* rightshift */
1088 1, /* size (0 = byte, 1 = short, 2 = long) */
1089 16, /* bitsize */
1090 FALSE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_dont,/* complain_on_overflow */
1093 bfd_elf_generic_reloc, /* special_function */
1094 "R_PPC64_ADDR16_LO_DS",/* name */
1095 FALSE, /* partial_inplace */
1096 0, /* src_mask */
1097 0xfffc, /* dst_mask */
1098 FALSE), /* pcrel_offset */
1099
1100 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1101 HOWTO (R_PPC64_GOT16_DS, /* type */
1102 0, /* rightshift */
1103 1, /* size (0 = byte, 1 = short, 2 = long) */
1104 16, /* bitsize */
1105 FALSE, /* pc_relative */
1106 0, /* bitpos */
1107 complain_overflow_signed, /* complain_on_overflow */
1108 ppc64_elf_unhandled_reloc, /* special_function */
1109 "R_PPC64_GOT16_DS", /* name */
1110 FALSE, /* partial_inplace */
1111 0, /* src_mask */
1112 0xfffc, /* dst_mask */
1113 FALSE), /* pcrel_offset */
1114
1115 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1116 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1117 0, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_dont, /* complain_on_overflow */
1123 ppc64_elf_unhandled_reloc, /* special_function */
1124 "R_PPC64_GOT16_LO_DS", /* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xfffc, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1131 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_dont, /* complain_on_overflow */
1138 ppc64_elf_unhandled_reloc, /* special_function */
1139 "R_PPC64_PLT16_LO_DS", /* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xfffc, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1146 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1147 0, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_bitfield, /* complain_on_overflow */
1153 ppc64_elf_sectoff_reloc, /* special_function */
1154 "R_PPC64_SECTOFF_DS", /* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xfffc, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1161 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1162 0, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_dont, /* complain_on_overflow */
1168 ppc64_elf_sectoff_reloc, /* special_function */
1169 "R_PPC64_SECTOFF_LO_DS",/* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xfffc, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1176 HOWTO (R_PPC64_TOC16_DS, /* type */
1177 0, /* rightshift */
1178 1, /* size (0 = byte, 1 = short, 2 = long) */
1179 16, /* bitsize */
1180 FALSE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_signed, /* complain_on_overflow */
1183 ppc64_elf_toc_reloc, /* special_function */
1184 "R_PPC64_TOC16_DS", /* name */
1185 FALSE, /* partial_inplace */
1186 0, /* src_mask */
1187 0xfffc, /* dst_mask */
1188 FALSE), /* pcrel_offset */
1189
1190 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1191 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1192 0, /* rightshift */
1193 1, /* size (0 = byte, 1 = short, 2 = long) */
1194 16, /* bitsize */
1195 FALSE, /* pc_relative */
1196 0, /* bitpos */
1197 complain_overflow_dont, /* complain_on_overflow */
1198 ppc64_elf_toc_reloc, /* special_function */
1199 "R_PPC64_TOC16_LO_DS", /* name */
1200 FALSE, /* partial_inplace */
1201 0, /* src_mask */
1202 0xfffc, /* dst_mask */
1203 FALSE), /* pcrel_offset */
1204
1205 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1206 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1207 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1208 0, /* rightshift */
1209 1, /* size (0 = byte, 1 = short, 2 = long) */
1210 16, /* bitsize */
1211 FALSE, /* pc_relative */
1212 0, /* bitpos */
1213 complain_overflow_signed, /* complain_on_overflow */
1214 ppc64_elf_unhandled_reloc, /* special_function */
1215 "R_PPC64_PLTGOT16_DS", /* name */
1216 FALSE, /* partial_inplace */
1217 0, /* src_mask */
1218 0xfffc, /* dst_mask */
1219 FALSE), /* pcrel_offset */
1220
1221 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1222 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1223 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1224 0, /* rightshift */
1225 1, /* size (0 = byte, 1 = short, 2 = long) */
1226 16, /* bitsize */
1227 FALSE, /* pc_relative */
1228 0, /* bitpos */
1229 complain_overflow_dont, /* complain_on_overflow */
1230 ppc64_elf_unhandled_reloc, /* special_function */
1231 "R_PPC64_PLTGOT16_LO_DS",/* name */
1232 FALSE, /* partial_inplace */
1233 0, /* src_mask */
1234 0xfffc, /* dst_mask */
1235 FALSE), /* pcrel_offset */
1236
1237 /* Marker reloc for TLS. */
1238 HOWTO (R_PPC64_TLS,
1239 0, /* rightshift */
1240 2, /* size (0 = byte, 1 = short, 2 = long) */
1241 32, /* bitsize */
1242 FALSE, /* pc_relative */
1243 0, /* bitpos */
1244 complain_overflow_dont, /* complain_on_overflow */
1245 bfd_elf_generic_reloc, /* special_function */
1246 "R_PPC64_TLS", /* name */
1247 FALSE, /* partial_inplace */
1248 0, /* src_mask */
1249 0, /* dst_mask */
1250 FALSE), /* pcrel_offset */
1251
1252 /* Computes the load module index of the load module that contains the
1253 definition of its TLS sym. */
1254 HOWTO (R_PPC64_DTPMOD64,
1255 0, /* rightshift */
1256 4, /* size (0 = byte, 1 = short, 2 = long) */
1257 64, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 ppc64_elf_unhandled_reloc, /* special_function */
1262 "R_PPC64_DTPMOD64", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 ONES (64), /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 /* Computes a dtv-relative displacement, the difference between the value
1269 of sym+add and the base address of the thread-local storage block that
1270 contains the definition of sym, minus 0x8000. */
1271 HOWTO (R_PPC64_DTPREL64,
1272 0, /* rightshift */
1273 4, /* size (0 = byte, 1 = short, 2 = long) */
1274 64, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 ppc64_elf_unhandled_reloc, /* special_function */
1279 "R_PPC64_DTPREL64", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 ONES (64), /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* A 16 bit dtprel reloc. */
1286 HOWTO (R_PPC64_DTPREL16,
1287 0, /* rightshift */
1288 1, /* size (0 = byte, 1 = short, 2 = long) */
1289 16, /* bitsize */
1290 FALSE, /* pc_relative */
1291 0, /* bitpos */
1292 complain_overflow_signed, /* complain_on_overflow */
1293 ppc64_elf_unhandled_reloc, /* special_function */
1294 "R_PPC64_DTPREL16", /* name */
1295 FALSE, /* partial_inplace */
1296 0, /* src_mask */
1297 0xffff, /* dst_mask */
1298 FALSE), /* pcrel_offset */
1299
1300 /* Like DTPREL16, but no overflow. */
1301 HOWTO (R_PPC64_DTPREL16_LO,
1302 0, /* rightshift */
1303 1, /* size (0 = byte, 1 = short, 2 = long) */
1304 16, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL16_LO", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 0xffff, /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1316 HOWTO (R_PPC64_DTPREL16_HI,
1317 16, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_dont, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16_HI", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1331 HOWTO (R_PPC64_DTPREL16_HA,
1332 16, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_HA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HIGHER,
1347 32, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HIGHER", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1362 32, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HIGHERA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1377 48, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHEST", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1392 48, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16, but for insns with a DS field. */
1406 HOWTO (R_PPC64_DTPREL16_DS,
1407 0, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_signed, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_DS", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xfffc, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_DS, but no overflow. */
1421 HOWTO (R_PPC64_DTPREL16_LO_DS,
1422 0, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_LO_DS", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xfffc, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Computes a tp-relative displacement, the difference between the value of
1436 sym+add and the value of the thread pointer (r13). */
1437 HOWTO (R_PPC64_TPREL64,
1438 0, /* rightshift */
1439 4, /* size (0 = byte, 1 = short, 2 = long) */
1440 64, /* bitsize */
1441 FALSE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_dont, /* complain_on_overflow */
1444 ppc64_elf_unhandled_reloc, /* special_function */
1445 "R_PPC64_TPREL64", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 ONES (64), /* dst_mask */
1449 FALSE), /* pcrel_offset */
1450
1451 /* A 16 bit tprel reloc. */
1452 HOWTO (R_PPC64_TPREL16,
1453 0, /* rightshift */
1454 1, /* size (0 = byte, 1 = short, 2 = long) */
1455 16, /* bitsize */
1456 FALSE, /* pc_relative */
1457 0, /* bitpos */
1458 complain_overflow_signed, /* complain_on_overflow */
1459 ppc64_elf_unhandled_reloc, /* special_function */
1460 "R_PPC64_TPREL16", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xffff, /* dst_mask */
1464 FALSE), /* pcrel_offset */
1465
1466 /* Like TPREL16, but no overflow. */
1467 HOWTO (R_PPC64_TPREL16_LO,
1468 0, /* rightshift */
1469 1, /* size (0 = byte, 1 = short, 2 = long) */
1470 16, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL16_LO", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0xffff, /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* Like TPREL16_LO, but next higher group of 16 bits. */
1482 HOWTO (R_PPC64_TPREL16_HI,
1483 16, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16_HI", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16_HI, but adjust for low 16 bits. */
1497 HOWTO (R_PPC64_TPREL16_HA,
1498 16, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_HA", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_HI, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HIGHER,
1513 32, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HIGHER", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HIGHERA,
1528 32, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HIGHERA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHEST,
1543 48, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHEST", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1558 48, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHESTA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16, but for insns with a DS field. */
1572 HOWTO (R_PPC64_TPREL16_DS,
1573 0, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_signed, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_DS", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xfffc, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_DS, but no overflow. */
1587 HOWTO (R_PPC64_TPREL16_LO_DS,
1588 0, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_LO_DS", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xfffc, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1602 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1603 to the first entry relative to the TOC base (r2). */
1604 HOWTO (R_PPC64_GOT_TLSGD16,
1605 0, /* rightshift */
1606 1, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_signed, /* complain_on_overflow */
1611 ppc64_elf_unhandled_reloc, /* special_function */
1612 "R_PPC64_GOT_TLSGD16", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0xffff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* Like GOT_TLSGD16, but no overflow. */
1619 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1620 0, /* rightshift */
1621 1, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc64_elf_unhandled_reloc, /* special_function */
1627 "R_PPC64_GOT_TLSGD16_LO", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0xffff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1634 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1635 16, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_dont, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16_HI", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1650 16, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_HA", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1664 with values (sym+add)@dtpmod and zero, and computes the offset to the
1665 first entry relative to the TOC base (r2). */
1666 HOWTO (R_PPC64_GOT_TLSLD16,
1667 0, /* rightshift */
1668 1, /* size (0 = byte, 1 = short, 2 = long) */
1669 16, /* bitsize */
1670 FALSE, /* pc_relative */
1671 0, /* bitpos */
1672 complain_overflow_signed, /* complain_on_overflow */
1673 ppc64_elf_unhandled_reloc, /* special_function */
1674 "R_PPC64_GOT_TLSLD16", /* name */
1675 FALSE, /* partial_inplace */
1676 0, /* src_mask */
1677 0xffff, /* dst_mask */
1678 FALSE), /* pcrel_offset */
1679
1680 /* Like GOT_TLSLD16, but no overflow. */
1681 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1682 0, /* rightshift */
1683 1, /* size (0 = byte, 1 = short, 2 = long) */
1684 16, /* bitsize */
1685 FALSE, /* pc_relative */
1686 0, /* bitpos */
1687 complain_overflow_dont, /* complain_on_overflow */
1688 ppc64_elf_unhandled_reloc, /* special_function */
1689 "R_PPC64_GOT_TLSLD16_LO", /* name */
1690 FALSE, /* partial_inplace */
1691 0, /* src_mask */
1692 0xffff, /* dst_mask */
1693 FALSE), /* pcrel_offset */
1694
1695 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1696 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1697 16, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_dont, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16_HI", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1712 16, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_HA", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1726 the offset to the entry relative to the TOC base (r2). */
1727 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1728 0, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_DTPREL16_DS", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xfffc, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_DTPREL16_DS, but no overflow. */
1742 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1743 0, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_dont, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xfffc, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1757 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1758 16, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_dont, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_HI", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xffff, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1773 16, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_HA", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xffff, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1787 offset to the entry relative to the TOC base (r2). */
1788 HOWTO (R_PPC64_GOT_TPREL16_DS,
1789 0, /* rightshift */
1790 1, /* size (0 = byte, 1 = short, 2 = long) */
1791 16, /* bitsize */
1792 FALSE, /* pc_relative */
1793 0, /* bitpos */
1794 complain_overflow_signed, /* complain_on_overflow */
1795 ppc64_elf_unhandled_reloc, /* special_function */
1796 "R_PPC64_GOT_TPREL16_DS", /* name */
1797 FALSE, /* partial_inplace */
1798 0, /* src_mask */
1799 0xfffc, /* dst_mask */
1800 FALSE), /* pcrel_offset */
1801
1802 /* Like GOT_TPREL16_DS, but no overflow. */
1803 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1804 0, /* rightshift */
1805 1, /* size (0 = byte, 1 = short, 2 = long) */
1806 16, /* bitsize */
1807 FALSE, /* pc_relative */
1808 0, /* bitpos */
1809 complain_overflow_dont, /* complain_on_overflow */
1810 ppc64_elf_unhandled_reloc, /* special_function */
1811 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1812 FALSE, /* partial_inplace */
1813 0, /* src_mask */
1814 0xfffc, /* dst_mask */
1815 FALSE), /* pcrel_offset */
1816
1817 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1818 HOWTO (R_PPC64_GOT_TPREL16_HI,
1819 16, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_dont, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_HI", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xffff, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1833 HOWTO (R_PPC64_GOT_TPREL16_HA,
1834 16, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_HA", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xffff, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* GNU extension to record C++ vtable hierarchy. */
1848 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1849 0, /* rightshift */
1850 0, /* size (0 = byte, 1 = short, 2 = long) */
1851 0, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 NULL, /* special_function */
1856 "R_PPC64_GNU_VTINHERIT", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* GNU extension to record C++ vtable member usage. */
1863 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1864 0, /* rightshift */
1865 0, /* size (0 = byte, 1 = short, 2 = long) */
1866 0, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 NULL, /* special_function */
1871 "R_PPC64_GNU_VTENTRY", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876 };
1877
1878 \f
1879 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1880 be done. */
1881
1882 static void
1883 ppc_howto_init (void)
1884 {
1885 unsigned int i, type;
1886
1887 for (i = 0;
1888 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1889 i++)
1890 {
1891 type = ppc64_elf_howto_raw[i].type;
1892 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1893 / sizeof (ppc64_elf_howto_table[0])));
1894 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1895 }
1896 }
1897
1898 static reloc_howto_type *
1899 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1900 bfd_reloc_code_real_type code)
1901 {
1902 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1903
1904 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1905 /* Initialize howto table if needed. */
1906 ppc_howto_init ();
1907
1908 switch (code)
1909 {
1910 default:
1911 return NULL;
1912
1913 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1914 break;
1915 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1916 break;
1917 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1918 break;
1919 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1920 break;
1921 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1922 break;
1923 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1924 break;
1925 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1926 break;
1927 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1928 break;
1929 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1930 break;
1931 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1932 break;
1933 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1934 break;
1935 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1936 break;
1937 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1938 break;
1939 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1940 break;
1941 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1942 break;
1943 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1944 break;
1945 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1946 break;
1947 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1948 break;
1949 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1950 break;
1951 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1952 break;
1953 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1954 break;
1955 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1956 break;
1957 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1958 break;
1959 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1960 break;
1961 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1962 break;
1963 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1964 break;
1965 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1966 break;
1967 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1968 break;
1969 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1970 break;
1971 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1972 break;
1973 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1974 break;
1975 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1976 break;
1977 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1978 break;
1979 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1980 break;
1981 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1982 break;
1983 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1984 break;
1985 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1986 break;
1987 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1988 break;
1989 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1990 break;
1991 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1992 break;
1993 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1994 break;
1995 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1996 break;
1997 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1998 break;
1999 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2000 break;
2001 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2002 break;
2003 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2004 break;
2005 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2006 break;
2007 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2008 break;
2009 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2010 break;
2011 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2012 break;
2013 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2014 break;
2015 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2018 break;
2019 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2020 break;
2021 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2022 break;
2023 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2024 break;
2025 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2026 break;
2027 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2028 break;
2029 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2030 break;
2031 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2032 break;
2033 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2034 break;
2035 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2036 break;
2037 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2038 break;
2039 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2040 break;
2041 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2042 break;
2043 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2044 break;
2045 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2046 break;
2047 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2048 break;
2049 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2050 break;
2051 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2052 break;
2053 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2066 break;
2067 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2068 break;
2069 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2070 break;
2071 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2072 break;
2073 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2074 break;
2075 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2076 break;
2077 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2078 break;
2079 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2080 break;
2081 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2082 break;
2083 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2084 break;
2085 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2086 break;
2087 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2088 break;
2089 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2090 break;
2091 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2092 break;
2093 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2094 break;
2095 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2096 break;
2097 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2098 break;
2099 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2100 break;
2101 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2102 break;
2103 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2104 break;
2105 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2106 break;
2107 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2108 break;
2109 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2110 break;
2111 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2112 break;
2113 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2114 break;
2115 }
2116
2117 return ppc64_elf_howto_table[r];
2118 };
2119
2120 static reloc_howto_type *
2121 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2122 const char *r_name)
2123 {
2124 unsigned int i;
2125
2126 for (i = 0;
2127 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2128 i++)
2129 if (ppc64_elf_howto_raw[i].name != NULL
2130 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2131 return &ppc64_elf_howto_raw[i];
2132
2133 return NULL;
2134 }
2135
2136 /* Set the howto pointer for a PowerPC ELF reloc. */
2137
2138 static void
2139 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2140 Elf_Internal_Rela *dst)
2141 {
2142 unsigned int type;
2143
2144 /* Initialize howto table if needed. */
2145 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2146 ppc_howto_init ();
2147
2148 type = ELF64_R_TYPE (dst->r_info);
2149 if (type >= (sizeof (ppc64_elf_howto_table)
2150 / sizeof (ppc64_elf_howto_table[0])))
2151 {
2152 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2153 abfd, (int) type);
2154 type = R_PPC64_NONE;
2155 }
2156 cache_ptr->howto = ppc64_elf_howto_table[type];
2157 }
2158
2159 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2160
2161 static bfd_reloc_status_type
2162 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2163 void *data, asection *input_section,
2164 bfd *output_bfd, char **error_message)
2165 {
2166 /* If this is a relocatable link (output_bfd test tells us), just
2167 call the generic function. Any adjustment will be done at final
2168 link time. */
2169 if (output_bfd != NULL)
2170 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2171 input_section, output_bfd, error_message);
2172
2173 /* Adjust the addend for sign extension of the low 16 bits.
2174 We won't actually be using the low 16 bits, so trashing them
2175 doesn't matter. */
2176 reloc_entry->addend += 0x8000;
2177 return bfd_reloc_continue;
2178 }
2179
2180 static bfd_reloc_status_type
2181 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2182 void *data, asection *input_section,
2183 bfd *output_bfd, char **error_message)
2184 {
2185 if (output_bfd != NULL)
2186 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2187 input_section, output_bfd, error_message);
2188
2189 if (strcmp (symbol->section->name, ".opd") == 0
2190 && (symbol->section->owner->flags & DYNAMIC) == 0)
2191 {
2192 bfd_vma dest = opd_entry_value (symbol->section,
2193 symbol->value + reloc_entry->addend,
2194 NULL, NULL);
2195 if (dest != (bfd_vma) -1)
2196 reloc_entry->addend = dest - (symbol->value
2197 + symbol->section->output_section->vma
2198 + symbol->section->output_offset);
2199 }
2200 return bfd_reloc_continue;
2201 }
2202
2203 static bfd_reloc_status_type
2204 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2205 void *data, asection *input_section,
2206 bfd *output_bfd, char **error_message)
2207 {
2208 long insn;
2209 enum elf_ppc64_reloc_type r_type;
2210 bfd_size_type octets;
2211 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2212 bfd_boolean is_power4 = FALSE;
2213
2214 /* If this is a relocatable link (output_bfd test tells us), just
2215 call the generic function. Any adjustment will be done at final
2216 link time. */
2217 if (output_bfd != NULL)
2218 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2219 input_section, output_bfd, error_message);
2220
2221 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2222 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2223 insn &= ~(0x01 << 21);
2224 r_type = reloc_entry->howto->type;
2225 if (r_type == R_PPC64_ADDR14_BRTAKEN
2226 || r_type == R_PPC64_REL14_BRTAKEN)
2227 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2228
2229 if (is_power4)
2230 {
2231 /* Set 'a' bit. This is 0b00010 in BO field for branch
2232 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2233 for branch on CTR insns (BO == 1a00t or 1a01t). */
2234 if ((insn & (0x14 << 21)) == (0x04 << 21))
2235 insn |= 0x02 << 21;
2236 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2237 insn |= 0x08 << 21;
2238 else
2239 goto out;
2240 }
2241 else
2242 {
2243 bfd_vma target = 0;
2244 bfd_vma from;
2245
2246 if (!bfd_is_com_section (symbol->section))
2247 target = symbol->value;
2248 target += symbol->section->output_section->vma;
2249 target += symbol->section->output_offset;
2250 target += reloc_entry->addend;
2251
2252 from = (reloc_entry->address
2253 + input_section->output_offset
2254 + input_section->output_section->vma);
2255
2256 /* Invert 'y' bit if not the default. */
2257 if ((bfd_signed_vma) (target - from) < 0)
2258 insn ^= 0x01 << 21;
2259 }
2260 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2261 out:
2262 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2263 input_section, output_bfd, error_message);
2264 }
2265
2266 static bfd_reloc_status_type
2267 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2268 void *data, asection *input_section,
2269 bfd *output_bfd, char **error_message)
2270 {
2271 /* If this is a relocatable link (output_bfd test tells us), just
2272 call the generic function. Any adjustment will be done at final
2273 link time. */
2274 if (output_bfd != NULL)
2275 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2276 input_section, output_bfd, error_message);
2277
2278 /* Subtract the symbol section base address. */
2279 reloc_entry->addend -= symbol->section->output_section->vma;
2280 return bfd_reloc_continue;
2281 }
2282
2283 static bfd_reloc_status_type
2284 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2285 void *data, asection *input_section,
2286 bfd *output_bfd, char **error_message)
2287 {
2288 /* If this is a relocatable link (output_bfd test tells us), just
2289 call the generic function. Any adjustment will be done at final
2290 link time. */
2291 if (output_bfd != NULL)
2292 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2293 input_section, output_bfd, error_message);
2294
2295 /* Subtract the symbol section base address. */
2296 reloc_entry->addend -= symbol->section->output_section->vma;
2297
2298 /* Adjust the addend for sign extension of the low 16 bits. */
2299 reloc_entry->addend += 0x8000;
2300 return bfd_reloc_continue;
2301 }
2302
2303 static bfd_reloc_status_type
2304 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2305 void *data, asection *input_section,
2306 bfd *output_bfd, char **error_message)
2307 {
2308 bfd_vma TOCstart;
2309
2310 /* If this is a relocatable link (output_bfd test tells us), just
2311 call the generic function. Any adjustment will be done at final
2312 link time. */
2313 if (output_bfd != NULL)
2314 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2315 input_section, output_bfd, error_message);
2316
2317 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2318 if (TOCstart == 0)
2319 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2320
2321 /* Subtract the TOC base address. */
2322 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2323 return bfd_reloc_continue;
2324 }
2325
2326 static bfd_reloc_status_type
2327 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2328 void *data, asection *input_section,
2329 bfd *output_bfd, char **error_message)
2330 {
2331 bfd_vma TOCstart;
2332
2333 /* If this is a relocatable link (output_bfd test tells us), just
2334 call the generic function. Any adjustment will be done at final
2335 link time. */
2336 if (output_bfd != NULL)
2337 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2338 input_section, output_bfd, error_message);
2339
2340 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2341 if (TOCstart == 0)
2342 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2343
2344 /* Subtract the TOC base address. */
2345 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2346
2347 /* Adjust the addend for sign extension of the low 16 bits. */
2348 reloc_entry->addend += 0x8000;
2349 return bfd_reloc_continue;
2350 }
2351
2352 static bfd_reloc_status_type
2353 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2354 void *data, asection *input_section,
2355 bfd *output_bfd, char **error_message)
2356 {
2357 bfd_vma TOCstart;
2358 bfd_size_type octets;
2359
2360 /* If this is a relocatable link (output_bfd test tells us), just
2361 call the generic function. Any adjustment will be done at final
2362 link time. */
2363 if (output_bfd != NULL)
2364 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2365 input_section, output_bfd, error_message);
2366
2367 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2368 if (TOCstart == 0)
2369 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2370
2371 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2372 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2373 return bfd_reloc_ok;
2374 }
2375
2376 static bfd_reloc_status_type
2377 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2378 void *data, asection *input_section,
2379 bfd *output_bfd, char **error_message)
2380 {
2381 /* If this is a relocatable link (output_bfd test tells us), just
2382 call the generic function. Any adjustment will be done at final
2383 link time. */
2384 if (output_bfd != NULL)
2385 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2386 input_section, output_bfd, error_message);
2387
2388 if (error_message != NULL)
2389 {
2390 static char buf[60];
2391 sprintf (buf, "generic linker can't handle %s",
2392 reloc_entry->howto->name);
2393 *error_message = buf;
2394 }
2395 return bfd_reloc_dangerous;
2396 }
2397
2398 struct ppc64_elf_obj_tdata
2399 {
2400 struct elf_obj_tdata elf;
2401
2402 /* Shortcuts to dynamic linker sections. */
2403 asection *got;
2404 asection *relgot;
2405
2406 /* Used during garbage collection. We attach global symbols defined
2407 on removed .opd entries to this section so that the sym is removed. */
2408 asection *deleted_section;
2409
2410 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2411 sections means we potentially need one of these for each input bfd. */
2412 union {
2413 bfd_signed_vma refcount;
2414 bfd_vma offset;
2415 } tlsld_got;
2416
2417 /* A copy of relocs before they are modified for --emit-relocs. */
2418 Elf_Internal_Rela *opd_relocs;
2419 };
2420
2421 #define ppc64_elf_tdata(bfd) \
2422 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2423
2424 #define ppc64_tlsld_got(bfd) \
2425 (&ppc64_elf_tdata (bfd)->tlsld_got)
2426
2427 /* Override the generic function because we store some extras. */
2428
2429 static bfd_boolean
2430 ppc64_elf_mkobject (bfd *abfd)
2431 {
2432 if (abfd->tdata.any == NULL)
2433 {
2434 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2435 abfd->tdata.any = bfd_zalloc (abfd, amt);
2436 if (abfd->tdata.any == NULL)
2437 return FALSE;
2438 }
2439 return bfd_elf_mkobject (abfd);
2440 }
2441
2442 /* Return 1 if target is one of ours. */
2443
2444 static bfd_boolean
2445 is_ppc64_elf_target (const struct bfd_target *targ)
2446 {
2447 extern const bfd_target bfd_elf64_powerpc_vec;
2448 extern const bfd_target bfd_elf64_powerpcle_vec;
2449
2450 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2451 }
2452
2453 /* Fix bad default arch selected for a 64 bit input bfd when the
2454 default is 32 bit. */
2455
2456 static bfd_boolean
2457 ppc64_elf_object_p (bfd *abfd)
2458 {
2459 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2460 {
2461 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2462
2463 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2464 {
2465 /* Relies on arch after 32 bit default being 64 bit default. */
2466 abfd->arch_info = abfd->arch_info->next;
2467 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2468 }
2469 }
2470 return TRUE;
2471 }
2472
2473 /* Support for core dump NOTE sections. */
2474
2475 static bfd_boolean
2476 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2477 {
2478 size_t offset, size;
2479
2480 if (note->descsz != 504)
2481 return FALSE;
2482
2483 /* pr_cursig */
2484 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2485
2486 /* pr_pid */
2487 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2488
2489 /* pr_reg */
2490 offset = 112;
2491 size = 384;
2492
2493 /* Make a ".reg/999" section. */
2494 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2495 size, note->descpos + offset);
2496 }
2497
2498 static bfd_boolean
2499 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2500 {
2501 if (note->descsz != 136)
2502 return FALSE;
2503
2504 elf_tdata (abfd)->core_program
2505 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2506 elf_tdata (abfd)->core_command
2507 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2508
2509 return TRUE;
2510 }
2511
2512 static char *
2513 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2514 ...)
2515 {
2516 switch (note_type)
2517 {
2518 default:
2519 return NULL;
2520
2521 case NT_PRPSINFO:
2522 {
2523 char data[136];
2524 va_list ap;
2525
2526 va_start (ap, note_type);
2527 memset (data, 0, 40);
2528 strncpy (data + 40, va_arg (ap, const char *), 16);
2529 strncpy (data + 56, va_arg (ap, const char *), 80);
2530 va_end (ap);
2531 return elfcore_write_note (abfd, buf, bufsiz,
2532 "CORE", note_type, data, sizeof (data));
2533 }
2534
2535 case NT_PRSTATUS:
2536 {
2537 char data[504];
2538 va_list ap;
2539 long pid;
2540 int cursig;
2541 const void *greg;
2542
2543 va_start (ap, note_type);
2544 memset (data, 0, 112);
2545 pid = va_arg (ap, long);
2546 bfd_put_32 (abfd, pid, data + 32);
2547 cursig = va_arg (ap, int);
2548 bfd_put_16 (abfd, cursig, data + 12);
2549 greg = va_arg (ap, const void *);
2550 memcpy (data + 112, greg, 384);
2551 memset (data + 496, 0, 8);
2552 va_end (ap);
2553 return elfcore_write_note (abfd, buf, bufsiz,
2554 "CORE", note_type, data, sizeof (data));
2555 }
2556 }
2557 }
2558
2559 /* Merge backend specific data from an object file to the output
2560 object file when linking. */
2561
2562 static bfd_boolean
2563 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2564 {
2565 /* Check if we have the same endianess. */
2566 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2567 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2568 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2569 {
2570 const char *msg;
2571
2572 if (bfd_big_endian (ibfd))
2573 msg = _("%B: compiled for a big endian system "
2574 "and target is little endian");
2575 else
2576 msg = _("%B: compiled for a little endian system "
2577 "and target is big endian");
2578
2579 (*_bfd_error_handler) (msg, ibfd);
2580
2581 bfd_set_error (bfd_error_wrong_format);
2582 return FALSE;
2583 }
2584
2585 return TRUE;
2586 }
2587
2588 /* Add extra PPC sections. */
2589
2590 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2591 {
2592 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2593 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2594 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2595 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2596 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2597 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2598 { NULL, 0, 0, 0, 0 }
2599 };
2600
2601 enum _ppc64_sec_type {
2602 sec_normal = 0,
2603 sec_opd = 1,
2604 sec_toc = 2
2605 };
2606
2607 struct _ppc64_elf_section_data
2608 {
2609 struct bfd_elf_section_data elf;
2610
2611 /* An array with one entry for each opd function descriptor. */
2612 union
2613 {
2614 /* Points to the function code section for local opd entries. */
2615 asection **opd_func_sec;
2616 /* After editing .opd, adjust references to opd local syms. */
2617 long *opd_adjust;
2618
2619 /* An array for toc sections, indexed by offset/8.
2620 Specifies the relocation symbol index used at a given toc offset. */
2621 unsigned *t_symndx;
2622 } u;
2623
2624 enum _ppc64_sec_type sec_type:2;
2625
2626 /* Flag set when small branches are detected. Used to
2627 select suitable defaults for the stub group size. */
2628 unsigned int has_14bit_branch:1;
2629 };
2630
2631 #define ppc64_elf_section_data(sec) \
2632 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2633
2634 static bfd_boolean
2635 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2636 {
2637 if (!sec->used_by_bfd)
2638 {
2639 struct _ppc64_elf_section_data *sdata;
2640 bfd_size_type amt = sizeof (*sdata);
2641
2642 sdata = bfd_zalloc (abfd, amt);
2643 if (sdata == NULL)
2644 return FALSE;
2645 sec->used_by_bfd = sdata;
2646 }
2647
2648 return _bfd_elf_new_section_hook (abfd, sec);
2649 }
2650
2651 static void *
2652 get_opd_info (asection * sec)
2653 {
2654 if (sec != NULL
2655 && ppc64_elf_section_data (sec) != NULL
2656 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2657 return ppc64_elf_section_data (sec)->u.opd_adjust;
2658 return NULL;
2659 }
2660 \f
2661 /* Parameters for the qsort hook. */
2662 static asection *synthetic_opd;
2663 static bfd_boolean synthetic_relocatable;
2664
2665 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2666
2667 static int
2668 compare_symbols (const void *ap, const void *bp)
2669 {
2670 const asymbol *a = * (const asymbol **) ap;
2671 const asymbol *b = * (const asymbol **) bp;
2672
2673 /* Section symbols first. */
2674 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2675 return -1;
2676 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2677 return 1;
2678
2679 /* then .opd symbols. */
2680 if (a->section == synthetic_opd && b->section != synthetic_opd)
2681 return -1;
2682 if (a->section != synthetic_opd && b->section == synthetic_opd)
2683 return 1;
2684
2685 /* then other code symbols. */
2686 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2687 == (SEC_CODE | SEC_ALLOC)
2688 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2689 != (SEC_CODE | SEC_ALLOC))
2690 return -1;
2691
2692 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2693 != (SEC_CODE | SEC_ALLOC)
2694 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2695 == (SEC_CODE | SEC_ALLOC))
2696 return 1;
2697
2698 if (synthetic_relocatable)
2699 {
2700 if (a->section->id < b->section->id)
2701 return -1;
2702
2703 if (a->section->id > b->section->id)
2704 return 1;
2705 }
2706
2707 if (a->value + a->section->vma < b->value + b->section->vma)
2708 return -1;
2709
2710 if (a->value + a->section->vma > b->value + b->section->vma)
2711 return 1;
2712
2713 /* For syms with the same value, prefer strong dynamic global function
2714 syms over other syms. */
2715 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2716 return -1;
2717
2718 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2719 return 1;
2720
2721 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2722 return -1;
2723
2724 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2725 return 1;
2726
2727 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2728 return -1;
2729
2730 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2731 return 1;
2732
2733 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2734 return -1;
2735
2736 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2737 return 1;
2738
2739 return 0;
2740 }
2741
2742 /* Search SYMS for a symbol of the given VALUE. */
2743
2744 static asymbol *
2745 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2746 {
2747 long mid;
2748
2749 if (id == -1)
2750 {
2751 while (lo < hi)
2752 {
2753 mid = (lo + hi) >> 1;
2754 if (syms[mid]->value + syms[mid]->section->vma < value)
2755 lo = mid + 1;
2756 else if (syms[mid]->value + syms[mid]->section->vma > value)
2757 hi = mid;
2758 else
2759 return syms[mid];
2760 }
2761 }
2762 else
2763 {
2764 while (lo < hi)
2765 {
2766 mid = (lo + hi) >> 1;
2767 if (syms[mid]->section->id < id)
2768 lo = mid + 1;
2769 else if (syms[mid]->section->id > id)
2770 hi = mid;
2771 else if (syms[mid]->value < value)
2772 lo = mid + 1;
2773 else if (syms[mid]->value > value)
2774 hi = mid;
2775 else
2776 return syms[mid];
2777 }
2778 }
2779 return NULL;
2780 }
2781
2782 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2783 entry syms. */
2784
2785 static long
2786 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2787 long static_count, asymbol **static_syms,
2788 long dyn_count, asymbol **dyn_syms,
2789 asymbol **ret)
2790 {
2791 asymbol *s;
2792 long i;
2793 long count;
2794 char *names;
2795 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2796 asection *opd;
2797 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2798 asymbol **syms;
2799
2800 *ret = NULL;
2801
2802 opd = bfd_get_section_by_name (abfd, ".opd");
2803 if (opd == NULL)
2804 return 0;
2805
2806 symcount = static_count;
2807 if (!relocatable)
2808 symcount += dyn_count;
2809 if (symcount == 0)
2810 return 0;
2811
2812 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2813 if (syms == NULL)
2814 return -1;
2815
2816 if (!relocatable && static_count != 0 && dyn_count != 0)
2817 {
2818 /* Use both symbol tables. */
2819 memcpy (syms, static_syms, static_count * sizeof (*syms));
2820 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2821 }
2822 else if (!relocatable && static_count == 0)
2823 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2824 else
2825 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2826
2827 synthetic_opd = opd;
2828 synthetic_relocatable = relocatable;
2829 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2830
2831 if (!relocatable && symcount > 1)
2832 {
2833 long j;
2834 /* Trim duplicate syms, since we may have merged the normal and
2835 dynamic symbols. Actually, we only care about syms that have
2836 different values, so trim any with the same value. */
2837 for (i = 1, j = 1; i < symcount; ++i)
2838 if (syms[i - 1]->value + syms[i - 1]->section->vma
2839 != syms[i]->value + syms[i]->section->vma)
2840 syms[j++] = syms[i];
2841 symcount = j;
2842 }
2843
2844 i = 0;
2845 if (syms[i]->section == opd)
2846 ++i;
2847 codesecsym = i;
2848
2849 for (; i < symcount; ++i)
2850 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2851 != (SEC_CODE | SEC_ALLOC))
2852 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2853 break;
2854 codesecsymend = i;
2855
2856 for (; i < symcount; ++i)
2857 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2858 break;
2859 secsymend = i;
2860
2861 for (; i < symcount; ++i)
2862 if (syms[i]->section != opd)
2863 break;
2864 opdsymend = i;
2865
2866 for (; i < symcount; ++i)
2867 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2868 != (SEC_CODE | SEC_ALLOC))
2869 break;
2870 symcount = i;
2871
2872 count = 0;
2873 if (opdsymend == secsymend)
2874 goto done;
2875
2876 if (relocatable)
2877 {
2878 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2879 arelent *r;
2880 size_t size;
2881 long relcount;
2882
2883 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2884 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2885 if (relcount == 0)
2886 goto done;
2887
2888 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2889 {
2890 count = -1;
2891 goto done;
2892 }
2893
2894 size = 0;
2895 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2896 {
2897 asymbol *sym;
2898
2899 while (r < opd->relocation + relcount
2900 && r->address < syms[i]->value + opd->vma)
2901 ++r;
2902
2903 if (r == opd->relocation + relcount)
2904 break;
2905
2906 if (r->address != syms[i]->value + opd->vma)
2907 continue;
2908
2909 if (r->howto->type != R_PPC64_ADDR64)
2910 continue;
2911
2912 sym = *r->sym_ptr_ptr;
2913 if (!sym_exists_at (syms, opdsymend, symcount,
2914 sym->section->id, sym->value + r->addend))
2915 {
2916 ++count;
2917 size += sizeof (asymbol);
2918 size += strlen (syms[i]->name) + 2;
2919 }
2920 }
2921
2922 s = *ret = bfd_malloc (size);
2923 if (s == NULL)
2924 {
2925 count = -1;
2926 goto done;
2927 }
2928
2929 names = (char *) (s + count);
2930
2931 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2932 {
2933 asymbol *sym;
2934
2935 while (r < opd->relocation + relcount
2936 && r->address < syms[i]->value + opd->vma)
2937 ++r;
2938
2939 if (r == opd->relocation + relcount)
2940 break;
2941
2942 if (r->address != syms[i]->value + opd->vma)
2943 continue;
2944
2945 if (r->howto->type != R_PPC64_ADDR64)
2946 continue;
2947
2948 sym = *r->sym_ptr_ptr;
2949 if (!sym_exists_at (syms, opdsymend, symcount,
2950 sym->section->id, sym->value + r->addend))
2951 {
2952 size_t len;
2953
2954 *s = *syms[i];
2955 s->section = sym->section;
2956 s->value = sym->value + r->addend;
2957 s->name = names;
2958 *names++ = '.';
2959 len = strlen (syms[i]->name);
2960 memcpy (names, syms[i]->name, len + 1);
2961 names += len + 1;
2962 s++;
2963 }
2964 }
2965 }
2966 else
2967 {
2968 bfd_byte *contents;
2969 size_t size;
2970
2971 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2972 {
2973 if (contents)
2974 {
2975 free_contents_and_exit:
2976 free (contents);
2977 }
2978 count = -1;
2979 goto done;
2980 }
2981
2982 size = 0;
2983 for (i = secsymend; i < opdsymend; ++i)
2984 {
2985 bfd_vma ent;
2986
2987 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2988 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2989 {
2990 ++count;
2991 size += sizeof (asymbol);
2992 size += strlen (syms[i]->name) + 2;
2993 }
2994 }
2995
2996 s = *ret = bfd_malloc (size);
2997 if (s == NULL)
2998 goto free_contents_and_exit;
2999
3000 names = (char *) (s + count);
3001
3002 for (i = secsymend; i < opdsymend; ++i)
3003 {
3004 bfd_vma ent;
3005
3006 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3007 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3008 {
3009 long lo, hi;
3010 size_t len;
3011 asection *sec = abfd->sections;
3012
3013 *s = *syms[i];
3014 lo = codesecsym;
3015 hi = codesecsymend;
3016 while (lo < hi)
3017 {
3018 long mid = (lo + hi) >> 1;
3019 if (syms[mid]->section->vma < ent)
3020 lo = mid + 1;
3021 else if (syms[mid]->section->vma > ent)
3022 hi = mid;
3023 else
3024 {
3025 sec = syms[mid]->section;
3026 break;
3027 }
3028 }
3029
3030 if (lo >= hi && lo > codesecsym)
3031 sec = syms[lo - 1]->section;
3032
3033 for (; sec != NULL; sec = sec->next)
3034 {
3035 if (sec->vma > ent)
3036 break;
3037 if ((sec->flags & SEC_ALLOC) == 0
3038 || (sec->flags & SEC_LOAD) == 0)
3039 break;
3040 if ((sec->flags & SEC_CODE) != 0)
3041 s->section = sec;
3042 }
3043 s->value = ent - s->section->vma;
3044 s->name = names;
3045 *names++ = '.';
3046 len = strlen (syms[i]->name);
3047 memcpy (names, syms[i]->name, len + 1);
3048 names += len + 1;
3049 s++;
3050 }
3051 }
3052 free (contents);
3053 }
3054
3055 done:
3056 free (syms);
3057 return count;
3058 }
3059 \f
3060 /* The following functions are specific to the ELF linker, while
3061 functions above are used generally. Those named ppc64_elf_* are
3062 called by the main ELF linker code. They appear in this file more
3063 or less in the order in which they are called. eg.
3064 ppc64_elf_check_relocs is called early in the link process,
3065 ppc64_elf_finish_dynamic_sections is one of the last functions
3066 called.
3067
3068 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3069 functions have both a function code symbol and a function descriptor
3070 symbol. A call to foo in a relocatable object file looks like:
3071
3072 . .text
3073 . x:
3074 . bl .foo
3075 . nop
3076
3077 The function definition in another object file might be:
3078
3079 . .section .opd
3080 . foo: .quad .foo
3081 . .quad .TOC.@tocbase
3082 . .quad 0
3083 .
3084 . .text
3085 . .foo: blr
3086
3087 When the linker resolves the call during a static link, the branch
3088 unsurprisingly just goes to .foo and the .opd information is unused.
3089 If the function definition is in a shared library, things are a little
3090 different: The call goes via a plt call stub, the opd information gets
3091 copied to the plt, and the linker patches the nop.
3092
3093 . x:
3094 . bl .foo_stub
3095 . ld 2,40(1)
3096 .
3097 .
3098 . .foo_stub:
3099 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3100 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3101 . std 2,40(1) # this is the general idea
3102 . ld 11,0(12)
3103 . ld 2,8(12)
3104 . mtctr 11
3105 . ld 11,16(12)
3106 . bctr
3107 .
3108 . .section .plt
3109 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3110
3111 The "reloc ()" notation is supposed to indicate that the linker emits
3112 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3113 copying.
3114
3115 What are the difficulties here? Well, firstly, the relocations
3116 examined by the linker in check_relocs are against the function code
3117 sym .foo, while the dynamic relocation in the plt is emitted against
3118 the function descriptor symbol, foo. Somewhere along the line, we need
3119 to carefully copy dynamic link information from one symbol to the other.
3120 Secondly, the generic part of the elf linker will make .foo a dynamic
3121 symbol as is normal for most other backends. We need foo dynamic
3122 instead, at least for an application final link. However, when
3123 creating a shared library containing foo, we need to have both symbols
3124 dynamic so that references to .foo are satisfied during the early
3125 stages of linking. Otherwise the linker might decide to pull in a
3126 definition from some other object, eg. a static library.
3127
3128 Update: As of August 2004, we support a new convention. Function
3129 calls may use the function descriptor symbol, ie. "bl foo". This
3130 behaves exactly as "bl .foo". */
3131
3132 /* The linker needs to keep track of the number of relocs that it
3133 decides to copy as dynamic relocs in check_relocs for each symbol.
3134 This is so that it can later discard them if they are found to be
3135 unnecessary. We store the information in a field extending the
3136 regular ELF linker hash table. */
3137
3138 struct ppc_dyn_relocs
3139 {
3140 struct ppc_dyn_relocs *next;
3141
3142 /* The input section of the reloc. */
3143 asection *sec;
3144
3145 /* Total number of relocs copied for the input section. */
3146 bfd_size_type count;
3147
3148 /* Number of pc-relative relocs copied for the input section. */
3149 bfd_size_type pc_count;
3150 };
3151
3152 /* Track GOT entries needed for a given symbol. We might need more
3153 than one got entry per symbol. */
3154 struct got_entry
3155 {
3156 struct got_entry *next;
3157
3158 /* The symbol addend that we'll be placing in the GOT. */
3159 bfd_vma addend;
3160
3161 /* Unlike other ELF targets, we use separate GOT entries for the same
3162 symbol referenced from different input files. This is to support
3163 automatic multiple TOC/GOT sections, where the TOC base can vary
3164 from one input file to another.
3165
3166 Point to the BFD owning this GOT entry. */
3167 bfd *owner;
3168
3169 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3170 TLS_TPREL or TLS_DTPREL for tls entries. */
3171 char tls_type;
3172
3173 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3174 union
3175 {
3176 bfd_signed_vma refcount;
3177 bfd_vma offset;
3178 } got;
3179 };
3180
3181 /* The same for PLT. */
3182 struct plt_entry
3183 {
3184 struct plt_entry *next;
3185
3186 bfd_vma addend;
3187
3188 union
3189 {
3190 bfd_signed_vma refcount;
3191 bfd_vma offset;
3192 } plt;
3193 };
3194
3195 /* Of those relocs that might be copied as dynamic relocs, this macro
3196 selects those that must be copied when linking a shared library,
3197 even when the symbol is local. */
3198
3199 #define MUST_BE_DYN_RELOC(RTYPE) \
3200 ((RTYPE) != R_PPC64_REL32 \
3201 && (RTYPE) != R_PPC64_REL64 \
3202 && (RTYPE) != R_PPC64_REL30)
3203
3204 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3205 copying dynamic variables from a shared lib into an app's dynbss
3206 section, and instead use a dynamic relocation to point into the
3207 shared lib. With code that gcc generates, it's vital that this be
3208 enabled; In the PowerPC64 ABI, the address of a function is actually
3209 the address of a function descriptor, which resides in the .opd
3210 section. gcc uses the descriptor directly rather than going via the
3211 GOT as some other ABI's do, which means that initialized function
3212 pointers must reference the descriptor. Thus, a function pointer
3213 initialized to the address of a function in a shared library will
3214 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3215 redefines the function descriptor symbol to point to the copy. This
3216 presents a problem as a plt entry for that function is also
3217 initialized from the function descriptor symbol and the copy reloc
3218 may not be initialized first. */
3219 #define ELIMINATE_COPY_RELOCS 1
3220
3221 /* Section name for stubs is the associated section name plus this
3222 string. */
3223 #define STUB_SUFFIX ".stub"
3224
3225 /* Linker stubs.
3226 ppc_stub_long_branch:
3227 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3228 destination, but a 24 bit branch in a stub section will reach.
3229 . b dest
3230
3231 ppc_stub_plt_branch:
3232 Similar to the above, but a 24 bit branch in the stub section won't
3233 reach its destination.
3234 . addis %r12,%r2,xxx@toc@ha
3235 . ld %r11,xxx@toc@l(%r12)
3236 . mtctr %r11
3237 . bctr
3238
3239 ppc_stub_plt_call:
3240 Used to call a function in a shared library. If it so happens that
3241 the plt entry referenced crosses a 64k boundary, then an extra
3242 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3243 . addis %r12,%r2,xxx@toc@ha
3244 . std %r2,40(%r1)
3245 . ld %r11,xxx+0@toc@l(%r12)
3246 . mtctr %r11
3247 . ld %r2,xxx+8@toc@l(%r12)
3248 . ld %r11,xxx+16@toc@l(%r12)
3249 . bctr
3250
3251 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3252 code to adjust the value and save r2 to support multiple toc sections.
3253 A ppc_stub_long_branch with an r2 offset looks like:
3254 . std %r2,40(%r1)
3255 . addis %r2,%r2,off@ha
3256 . addi %r2,%r2,off@l
3257 . b dest
3258
3259 A ppc_stub_plt_branch with an r2 offset looks like:
3260 . std %r2,40(%r1)
3261 . addis %r12,%r2,xxx@toc@ha
3262 . ld %r11,xxx@toc@l(%r12)
3263 . addis %r2,%r2,off@ha
3264 . addi %r2,%r2,off@l
3265 . mtctr %r11
3266 . bctr
3267
3268 In cases where the "addis" instruction would add zero, the "addis" is
3269 omitted and following instructions modified slightly in some cases.
3270 */
3271
3272 enum ppc_stub_type {
3273 ppc_stub_none,
3274 ppc_stub_long_branch,
3275 ppc_stub_long_branch_r2off,
3276 ppc_stub_plt_branch,
3277 ppc_stub_plt_branch_r2off,
3278 ppc_stub_plt_call
3279 };
3280
3281 struct ppc_stub_hash_entry {
3282
3283 /* Base hash table entry structure. */
3284 struct bfd_hash_entry root;
3285
3286 enum ppc_stub_type stub_type;
3287
3288 /* The stub section. */
3289 asection *stub_sec;
3290
3291 /* Offset within stub_sec of the beginning of this stub. */
3292 bfd_vma stub_offset;
3293
3294 /* Given the symbol's value and its section we can determine its final
3295 value when building the stubs (so the stub knows where to jump. */
3296 bfd_vma target_value;
3297 asection *target_section;
3298
3299 /* The symbol table entry, if any, that this was derived from. */
3300 struct ppc_link_hash_entry *h;
3301
3302 /* And the reloc addend that this was derived from. */
3303 bfd_vma addend;
3304
3305 /* Where this stub is being called from, or, in the case of combined
3306 stub sections, the first input section in the group. */
3307 asection *id_sec;
3308 };
3309
3310 struct ppc_branch_hash_entry {
3311
3312 /* Base hash table entry structure. */
3313 struct bfd_hash_entry root;
3314
3315 /* Offset within branch lookup table. */
3316 unsigned int offset;
3317
3318 /* Generation marker. */
3319 unsigned int iter;
3320 };
3321
3322 struct ppc_link_hash_entry
3323 {
3324 struct elf_link_hash_entry elf;
3325
3326 union {
3327 /* A pointer to the most recently used stub hash entry against this
3328 symbol. */
3329 struct ppc_stub_hash_entry *stub_cache;
3330
3331 /* A pointer to the next symbol starting with a '.' */
3332 struct ppc_link_hash_entry *next_dot_sym;
3333 } u;
3334
3335 /* Track dynamic relocs copied for this symbol. */
3336 struct ppc_dyn_relocs *dyn_relocs;
3337
3338 /* Link between function code and descriptor symbols. */
3339 struct ppc_link_hash_entry *oh;
3340
3341 /* Flag function code and descriptor symbols. */
3342 unsigned int is_func:1;
3343 unsigned int is_func_descriptor:1;
3344 unsigned int fake:1;
3345
3346 /* Whether global opd/toc sym has been adjusted or not.
3347 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3348 should be set for all globals defined in any opd/toc section. */
3349 unsigned int adjust_done:1;
3350
3351 /* Set if we twiddled this symbol to weak at some stage. */
3352 unsigned int was_undefined:1;
3353
3354 /* Contexts in which symbol is used in the GOT (or TOC).
3355 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3356 corresponding relocs are encountered during check_relocs.
3357 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3358 indicate the corresponding GOT entry type is not needed.
3359 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3360 a TPREL one. We use a separate flag rather than setting TPREL
3361 just for convenience in distinguishing the two cases. */
3362 #define TLS_GD 1 /* GD reloc. */
3363 #define TLS_LD 2 /* LD reloc. */
3364 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3365 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3366 #define TLS_TLS 16 /* Any TLS reloc. */
3367 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3368 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3369 char tls_mask;
3370 };
3371
3372 /* ppc64 ELF linker hash table. */
3373
3374 struct ppc_link_hash_table
3375 {
3376 struct elf_link_hash_table elf;
3377
3378 /* The stub hash table. */
3379 struct bfd_hash_table stub_hash_table;
3380
3381 /* Another hash table for plt_branch stubs. */
3382 struct bfd_hash_table branch_hash_table;
3383
3384 /* Linker stub bfd. */
3385 bfd *stub_bfd;
3386
3387 /* Linker call-backs. */
3388 asection * (*add_stub_section) (const char *, asection *);
3389 void (*layout_sections_again) (void);
3390
3391 /* Array to keep track of which stub sections have been created, and
3392 information on stub grouping. */
3393 struct map_stub {
3394 /* This is the section to which stubs in the group will be attached. */
3395 asection *link_sec;
3396 /* The stub section. */
3397 asection *stub_sec;
3398 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3399 bfd_vma toc_off;
3400 } *stub_group;
3401
3402 /* Temp used when calculating TOC pointers. */
3403 bfd_vma toc_curr;
3404
3405 /* Highest input section id. */
3406 int top_id;
3407
3408 /* Highest output section index. */
3409 int top_index;
3410
3411 /* Used when adding symbols. */
3412 struct ppc_link_hash_entry *dot_syms;
3413
3414 /* List of input sections for each output section. */
3415 asection **input_list;
3416
3417 /* Short-cuts to get to dynamic linker sections. */
3418 asection *got;
3419 asection *plt;
3420 asection *relplt;
3421 asection *dynbss;
3422 asection *relbss;
3423 asection *glink;
3424 asection *sfpr;
3425 asection *brlt;
3426 asection *relbrlt;
3427
3428 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3429 struct ppc_link_hash_entry *tls_get_addr;
3430 struct ppc_link_hash_entry *tls_get_addr_fd;
3431
3432 /* Statistics. */
3433 unsigned long stub_count[ppc_stub_plt_call];
3434
3435 /* Number of stubs against global syms. */
3436 unsigned long stub_globals;
3437
3438 /* Set if we should emit symbols for stubs. */
3439 unsigned int emit_stub_syms:1;
3440
3441 /* Support for multiple toc sections. */
3442 unsigned int no_multi_toc:1;
3443 unsigned int multi_toc_needed:1;
3444
3445 /* Set on error. */
3446 unsigned int stub_error:1;
3447
3448 /* Temp used by ppc64_elf_check_directives. */
3449 unsigned int twiddled_syms:1;
3450
3451 /* Incremented every time we size stubs. */
3452 unsigned int stub_iteration;
3453
3454 /* Small local sym to section mapping cache. */
3455 struct sym_sec_cache sym_sec;
3456 };
3457
3458 /* Rename some of the generic section flags to better document how they
3459 are used here. */
3460 #define has_toc_reloc has_gp_reloc
3461 #define makes_toc_func_call need_finalize_relax
3462 #define call_check_in_progress reloc_done
3463
3464 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3465
3466 #define ppc_hash_table(p) \
3467 ((struct ppc_link_hash_table *) ((p)->hash))
3468
3469 #define ppc_stub_hash_lookup(table, string, create, copy) \
3470 ((struct ppc_stub_hash_entry *) \
3471 bfd_hash_lookup ((table), (string), (create), (copy)))
3472
3473 #define ppc_branch_hash_lookup(table, string, create, copy) \
3474 ((struct ppc_branch_hash_entry *) \
3475 bfd_hash_lookup ((table), (string), (create), (copy)))
3476
3477 /* Create an entry in the stub hash table. */
3478
3479 static struct bfd_hash_entry *
3480 stub_hash_newfunc (struct bfd_hash_entry *entry,
3481 struct bfd_hash_table *table,
3482 const char *string)
3483 {
3484 /* Allocate the structure if it has not already been allocated by a
3485 subclass. */
3486 if (entry == NULL)
3487 {
3488 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3489 if (entry == NULL)
3490 return entry;
3491 }
3492
3493 /* Call the allocation method of the superclass. */
3494 entry = bfd_hash_newfunc (entry, table, string);
3495 if (entry != NULL)
3496 {
3497 struct ppc_stub_hash_entry *eh;
3498
3499 /* Initialize the local fields. */
3500 eh = (struct ppc_stub_hash_entry *) entry;
3501 eh->stub_type = ppc_stub_none;
3502 eh->stub_sec = NULL;
3503 eh->stub_offset = 0;
3504 eh->target_value = 0;
3505 eh->target_section = NULL;
3506 eh->h = NULL;
3507 eh->id_sec = NULL;
3508 }
3509
3510 return entry;
3511 }
3512
3513 /* Create an entry in the branch hash table. */
3514
3515 static struct bfd_hash_entry *
3516 branch_hash_newfunc (struct bfd_hash_entry *entry,
3517 struct bfd_hash_table *table,
3518 const char *string)
3519 {
3520 /* Allocate the structure if it has not already been allocated by a
3521 subclass. */
3522 if (entry == NULL)
3523 {
3524 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3525 if (entry == NULL)
3526 return entry;
3527 }
3528
3529 /* Call the allocation method of the superclass. */
3530 entry = bfd_hash_newfunc (entry, table, string);
3531 if (entry != NULL)
3532 {
3533 struct ppc_branch_hash_entry *eh;
3534
3535 /* Initialize the local fields. */
3536 eh = (struct ppc_branch_hash_entry *) entry;
3537 eh->offset = 0;
3538 eh->iter = 0;
3539 }
3540
3541 return entry;
3542 }
3543
3544 /* Create an entry in a ppc64 ELF linker hash table. */
3545
3546 static struct bfd_hash_entry *
3547 link_hash_newfunc (struct bfd_hash_entry *entry,
3548 struct bfd_hash_table *table,
3549 const char *string)
3550 {
3551 /* Allocate the structure if it has not already been allocated by a
3552 subclass. */
3553 if (entry == NULL)
3554 {
3555 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3556 if (entry == NULL)
3557 return entry;
3558 }
3559
3560 /* Call the allocation method of the superclass. */
3561 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3562 if (entry != NULL)
3563 {
3564 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3565
3566 memset (&eh->u.stub_cache, 0,
3567 (sizeof (struct ppc_link_hash_entry)
3568 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3569
3570 /* When making function calls, old ABI code references function entry
3571 points (dot symbols), while new ABI code references the function
3572 descriptor symbol. We need to make any combination of reference and
3573 definition work together, without breaking archive linking.
3574
3575 For a defined function "foo" and an undefined call to "bar":
3576 An old object defines "foo" and ".foo", references ".bar" (possibly
3577 "bar" too).
3578 A new object defines "foo" and references "bar".
3579
3580 A new object thus has no problem with its undefined symbols being
3581 satisfied by definitions in an old object. On the other hand, the
3582 old object won't have ".bar" satisfied by a new object.
3583
3584 Keep a list of newly added dot-symbols. */
3585
3586 if (string[0] == '.')
3587 {
3588 struct ppc_link_hash_table *htab;
3589
3590 htab = (struct ppc_link_hash_table *) table;
3591 eh->u.next_dot_sym = htab->dot_syms;
3592 htab->dot_syms = eh;
3593 }
3594 }
3595
3596 return entry;
3597 }
3598
3599 /* Create a ppc64 ELF linker hash table. */
3600
3601 static struct bfd_link_hash_table *
3602 ppc64_elf_link_hash_table_create (bfd *abfd)
3603 {
3604 struct ppc_link_hash_table *htab;
3605 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3606
3607 htab = bfd_zmalloc (amt);
3608 if (htab == NULL)
3609 return NULL;
3610
3611 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3612 sizeof (struct ppc_link_hash_entry)))
3613 {
3614 free (htab);
3615 return NULL;
3616 }
3617
3618 /* Init the stub hash table too. */
3619 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3620 sizeof (struct ppc_stub_hash_entry)))
3621 return NULL;
3622
3623 /* And the branch hash table. */
3624 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3625 sizeof (struct ppc_branch_hash_entry)))
3626 return NULL;
3627
3628 /* Initializing two fields of the union is just cosmetic. We really
3629 only care about glist, but when compiled on a 32-bit host the
3630 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3631 debugger inspection of these fields look nicer. */
3632 htab->elf.init_got_refcount.refcount = 0;
3633 htab->elf.init_got_refcount.glist = NULL;
3634 htab->elf.init_plt_refcount.refcount = 0;
3635 htab->elf.init_plt_refcount.glist = NULL;
3636 htab->elf.init_got_offset.offset = 0;
3637 htab->elf.init_got_offset.glist = NULL;
3638 htab->elf.init_plt_offset.offset = 0;
3639 htab->elf.init_plt_offset.glist = NULL;
3640
3641 return &htab->elf.root;
3642 }
3643
3644 /* Free the derived linker hash table. */
3645
3646 static void
3647 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3648 {
3649 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3650
3651 bfd_hash_table_free (&ret->stub_hash_table);
3652 bfd_hash_table_free (&ret->branch_hash_table);
3653 _bfd_generic_link_hash_table_free (hash);
3654 }
3655
3656 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3657
3658 void
3659 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3660 {
3661 struct ppc_link_hash_table *htab;
3662
3663 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3664
3665 /* Always hook our dynamic sections into the first bfd, which is the
3666 linker created stub bfd. This ensures that the GOT header is at
3667 the start of the output TOC section. */
3668 htab = ppc_hash_table (info);
3669 htab->stub_bfd = abfd;
3670 htab->elf.dynobj = abfd;
3671 }
3672
3673 /* Build a name for an entry in the stub hash table. */
3674
3675 static char *
3676 ppc_stub_name (const asection *input_section,
3677 const asection *sym_sec,
3678 const struct ppc_link_hash_entry *h,
3679 const Elf_Internal_Rela *rel)
3680 {
3681 char *stub_name;
3682 bfd_size_type len;
3683
3684 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3685 offsets from a sym as a branch target? In fact, we could
3686 probably assume the addend is always zero. */
3687 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3688
3689 if (h)
3690 {
3691 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3692 stub_name = bfd_malloc (len);
3693 if (stub_name == NULL)
3694 return stub_name;
3695
3696 sprintf (stub_name, "%08x.%s+%x",
3697 input_section->id & 0xffffffff,
3698 h->elf.root.root.string,
3699 (int) rel->r_addend & 0xffffffff);
3700 }
3701 else
3702 {
3703 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3704 stub_name = bfd_malloc (len);
3705 if (stub_name == NULL)
3706 return stub_name;
3707
3708 sprintf (stub_name, "%08x.%x:%x+%x",
3709 input_section->id & 0xffffffff,
3710 sym_sec->id & 0xffffffff,
3711 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3712 (int) rel->r_addend & 0xffffffff);
3713 }
3714 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3715 stub_name[len - 2] = 0;
3716 return stub_name;
3717 }
3718
3719 /* Look up an entry in the stub hash. Stub entries are cached because
3720 creating the stub name takes a bit of time. */
3721
3722 static struct ppc_stub_hash_entry *
3723 ppc_get_stub_entry (const asection *input_section,
3724 const asection *sym_sec,
3725 struct ppc_link_hash_entry *h,
3726 const Elf_Internal_Rela *rel,
3727 struct ppc_link_hash_table *htab)
3728 {
3729 struct ppc_stub_hash_entry *stub_entry;
3730 const asection *id_sec;
3731
3732 /* If this input section is part of a group of sections sharing one
3733 stub section, then use the id of the first section in the group.
3734 Stub names need to include a section id, as there may well be
3735 more than one stub used to reach say, printf, and we need to
3736 distinguish between them. */
3737 id_sec = htab->stub_group[input_section->id].link_sec;
3738
3739 if (h != NULL && h->u.stub_cache != NULL
3740 && h->u.stub_cache->h == h
3741 && h->u.stub_cache->id_sec == id_sec)
3742 {
3743 stub_entry = h->u.stub_cache;
3744 }
3745 else
3746 {
3747 char *stub_name;
3748
3749 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3750 if (stub_name == NULL)
3751 return NULL;
3752
3753 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3754 stub_name, FALSE, FALSE);
3755 if (h != NULL)
3756 h->u.stub_cache = stub_entry;
3757
3758 free (stub_name);
3759 }
3760
3761 return stub_entry;
3762 }
3763
3764 /* Add a new stub entry to the stub hash. Not all fields of the new
3765 stub entry are initialised. */
3766
3767 static struct ppc_stub_hash_entry *
3768 ppc_add_stub (const char *stub_name,
3769 asection *section,
3770 struct ppc_link_hash_table *htab)
3771 {
3772 asection *link_sec;
3773 asection *stub_sec;
3774 struct ppc_stub_hash_entry *stub_entry;
3775
3776 link_sec = htab->stub_group[section->id].link_sec;
3777 stub_sec = htab->stub_group[section->id].stub_sec;
3778 if (stub_sec == NULL)
3779 {
3780 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3781 if (stub_sec == NULL)
3782 {
3783 size_t namelen;
3784 bfd_size_type len;
3785 char *s_name;
3786
3787 namelen = strlen (link_sec->name);
3788 len = namelen + sizeof (STUB_SUFFIX);
3789 s_name = bfd_alloc (htab->stub_bfd, len);
3790 if (s_name == NULL)
3791 return NULL;
3792
3793 memcpy (s_name, link_sec->name, namelen);
3794 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3795 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3796 if (stub_sec == NULL)
3797 return NULL;
3798 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3799 }
3800 htab->stub_group[section->id].stub_sec = stub_sec;
3801 }
3802
3803 /* Enter this entry into the linker stub hash table. */
3804 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3805 TRUE, FALSE);
3806 if (stub_entry == NULL)
3807 {
3808 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3809 section->owner, stub_name);
3810 return NULL;
3811 }
3812
3813 stub_entry->stub_sec = stub_sec;
3814 stub_entry->stub_offset = 0;
3815 stub_entry->id_sec = link_sec;
3816 return stub_entry;
3817 }
3818
3819 /* Create sections for linker generated code. */
3820
3821 static bfd_boolean
3822 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3823 {
3824 struct ppc_link_hash_table *htab;
3825 flagword flags;
3826
3827 htab = ppc_hash_table (info);
3828
3829 /* Create .sfpr for code to save and restore fp regs. */
3830 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3831 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3832 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3833 flags);
3834 if (htab->sfpr == NULL
3835 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3836 return FALSE;
3837
3838 /* Create .glink for lazy dynamic linking support. */
3839 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3840 flags);
3841 if (htab->glink == NULL
3842 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3843 return FALSE;
3844
3845 /* Create branch lookup table for plt_branch stubs. */
3846 flags = (SEC_ALLOC | SEC_LOAD
3847 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3848 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3849 flags);
3850 if (htab->brlt == NULL
3851 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3852 return FALSE;
3853
3854 if (!info->shared)
3855 return TRUE;
3856
3857 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3858 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3859 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3860 ".rela.branch_lt",
3861 flags);
3862 if (!htab->relbrlt
3863 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3864 return FALSE;
3865
3866 return TRUE;
3867 }
3868
3869 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3870 not already done. */
3871
3872 static bfd_boolean
3873 create_got_section (bfd *abfd, struct bfd_link_info *info)
3874 {
3875 asection *got, *relgot;
3876 flagword flags;
3877 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3878
3879 if (!htab->got)
3880 {
3881 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3882 return FALSE;
3883
3884 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3885 if (!htab->got)
3886 abort ();
3887 }
3888
3889 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3890 | SEC_LINKER_CREATED);
3891
3892 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3893 if (!got
3894 || !bfd_set_section_alignment (abfd, got, 3))
3895 return FALSE;
3896
3897 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3898 flags | SEC_READONLY);
3899 if (!relgot
3900 || ! bfd_set_section_alignment (abfd, relgot, 3))
3901 return FALSE;
3902
3903 ppc64_elf_tdata (abfd)->got = got;
3904 ppc64_elf_tdata (abfd)->relgot = relgot;
3905 return TRUE;
3906 }
3907
3908 /* Create the dynamic sections, and set up shortcuts. */
3909
3910 static bfd_boolean
3911 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3912 {
3913 struct ppc_link_hash_table *htab;
3914
3915 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3916 return FALSE;
3917
3918 htab = ppc_hash_table (info);
3919 if (!htab->got)
3920 htab->got = bfd_get_section_by_name (dynobj, ".got");
3921 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3922 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3923 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3924 if (!info->shared)
3925 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3926
3927 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3928 || (!info->shared && !htab->relbss))
3929 abort ();
3930
3931 return TRUE;
3932 }
3933
3934 /* Merge PLT info on FROM with that on TO. */
3935
3936 static void
3937 move_plt_plist (struct ppc_link_hash_entry *from,
3938 struct ppc_link_hash_entry *to)
3939 {
3940 if (from->elf.plt.plist != NULL)
3941 {
3942 if (to->elf.plt.plist != NULL)
3943 {
3944 struct plt_entry **entp;
3945 struct plt_entry *ent;
3946
3947 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3948 {
3949 struct plt_entry *dent;
3950
3951 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3952 if (dent->addend == ent->addend)
3953 {
3954 dent->plt.refcount += ent->plt.refcount;
3955 *entp = ent->next;
3956 break;
3957 }
3958 if (dent == NULL)
3959 entp = &ent->next;
3960 }
3961 *entp = to->elf.plt.plist;
3962 }
3963
3964 to->elf.plt.plist = from->elf.plt.plist;
3965 from->elf.plt.plist = NULL;
3966 }
3967 }
3968
3969 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3970
3971 static void
3972 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3973 struct elf_link_hash_entry *dir,
3974 struct elf_link_hash_entry *ind)
3975 {
3976 struct ppc_link_hash_entry *edir, *eind;
3977
3978 edir = (struct ppc_link_hash_entry *) dir;
3979 eind = (struct ppc_link_hash_entry *) ind;
3980
3981 /* Copy over any dynamic relocs we may have on the indirect sym. */
3982 if (eind->dyn_relocs != NULL)
3983 {
3984 if (edir->dyn_relocs != NULL)
3985 {
3986 struct ppc_dyn_relocs **pp;
3987 struct ppc_dyn_relocs *p;
3988
3989 /* Add reloc counts against the indirect sym to the direct sym
3990 list. Merge any entries against the same section. */
3991 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3992 {
3993 struct ppc_dyn_relocs *q;
3994
3995 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3996 if (q->sec == p->sec)
3997 {
3998 q->pc_count += p->pc_count;
3999 q->count += p->count;
4000 *pp = p->next;
4001 break;
4002 }
4003 if (q == NULL)
4004 pp = &p->next;
4005 }
4006 *pp = edir->dyn_relocs;
4007 }
4008
4009 edir->dyn_relocs = eind->dyn_relocs;
4010 eind->dyn_relocs = NULL;
4011 }
4012
4013 edir->is_func |= eind->is_func;
4014 edir->is_func_descriptor |= eind->is_func_descriptor;
4015 edir->tls_mask |= eind->tls_mask;
4016
4017 /* If called to transfer flags for a weakdef during processing
4018 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4019 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4020 if (!(ELIMINATE_COPY_RELOCS
4021 && eind->elf.root.type != bfd_link_hash_indirect
4022 && edir->elf.dynamic_adjusted))
4023 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4024
4025 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4026 edir->elf.ref_regular |= eind->elf.ref_regular;
4027 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4028 edir->elf.needs_plt |= eind->elf.needs_plt;
4029
4030 /* If we were called to copy over info for a weak sym, that's all. */
4031 if (eind->elf.root.type != bfd_link_hash_indirect)
4032 return;
4033
4034 /* Copy over got entries that we may have already seen to the
4035 symbol which just became indirect. */
4036 if (eind->elf.got.glist != NULL)
4037 {
4038 if (edir->elf.got.glist != NULL)
4039 {
4040 struct got_entry **entp;
4041 struct got_entry *ent;
4042
4043 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4044 {
4045 struct got_entry *dent;
4046
4047 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4048 if (dent->addend == ent->addend
4049 && dent->owner == ent->owner
4050 && dent->tls_type == ent->tls_type)
4051 {
4052 dent->got.refcount += ent->got.refcount;
4053 *entp = ent->next;
4054 break;
4055 }
4056 if (dent == NULL)
4057 entp = &ent->next;
4058 }
4059 *entp = edir->elf.got.glist;
4060 }
4061
4062 edir->elf.got.glist = eind->elf.got.glist;
4063 eind->elf.got.glist = NULL;
4064 }
4065
4066 /* And plt entries. */
4067 move_plt_plist (eind, edir);
4068
4069 if (eind->elf.dynindx != -1)
4070 {
4071 if (edir->elf.dynindx != -1)
4072 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4073 edir->elf.dynstr_index);
4074 edir->elf.dynindx = eind->elf.dynindx;
4075 edir->elf.dynstr_index = eind->elf.dynstr_index;
4076 eind->elf.dynindx = -1;
4077 eind->elf.dynstr_index = 0;
4078 }
4079 }
4080
4081 /* Find the function descriptor hash entry from the given function code
4082 hash entry FH. Link the entries via their OH fields. */
4083
4084 static struct ppc_link_hash_entry *
4085 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4086 {
4087 struct ppc_link_hash_entry *fdh = fh->oh;
4088
4089 if (fdh == NULL)
4090 {
4091 const char *fd_name = fh->elf.root.root.string + 1;
4092
4093 fdh = (struct ppc_link_hash_entry *)
4094 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4095 if (fdh != NULL)
4096 {
4097 fdh->is_func_descriptor = 1;
4098 fdh->oh = fh;
4099 fh->is_func = 1;
4100 fh->oh = fdh;
4101 }
4102 }
4103
4104 return fdh;
4105 }
4106
4107 /* Make a fake function descriptor sym for the code sym FH. */
4108
4109 static struct ppc_link_hash_entry *
4110 make_fdh (struct bfd_link_info *info,
4111 struct ppc_link_hash_entry *fh)
4112 {
4113 bfd *abfd;
4114 asymbol *newsym;
4115 struct bfd_link_hash_entry *bh;
4116 struct ppc_link_hash_entry *fdh;
4117
4118 abfd = fh->elf.root.u.undef.abfd;
4119 newsym = bfd_make_empty_symbol (abfd);
4120 newsym->name = fh->elf.root.root.string + 1;
4121 newsym->section = bfd_und_section_ptr;
4122 newsym->value = 0;
4123 newsym->flags = BSF_WEAK;
4124
4125 bh = NULL;
4126 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4127 newsym->flags, newsym->section,
4128 newsym->value, NULL, FALSE, FALSE,
4129 &bh))
4130 return NULL;
4131
4132 fdh = (struct ppc_link_hash_entry *) bh;
4133 fdh->elf.non_elf = 0;
4134 fdh->fake = 1;
4135 fdh->is_func_descriptor = 1;
4136 fdh->oh = fh;
4137 fh->is_func = 1;
4138 fh->oh = fdh;
4139 return fdh;
4140 }
4141
4142 /* Fix function descriptor symbols defined in .opd sections to be
4143 function type. */
4144
4145 static bfd_boolean
4146 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4147 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4148 Elf_Internal_Sym *isym,
4149 const char **name ATTRIBUTE_UNUSED,
4150 flagword *flags ATTRIBUTE_UNUSED,
4151 asection **sec,
4152 bfd_vma *value ATTRIBUTE_UNUSED)
4153 {
4154 if (*sec != NULL
4155 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4156 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4157
4158 return TRUE;
4159 }
4160
4161 /* This function makes an old ABI object reference to ".bar" cause the
4162 inclusion of a new ABI object archive that defines "bar".
4163 NAME is a symbol defined in an archive. Return a symbol in the hash
4164 table that might be satisfied by the archive symbols. */
4165
4166 static struct elf_link_hash_entry *
4167 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4168 struct bfd_link_info *info,
4169 const char *name)
4170 {
4171 struct elf_link_hash_entry *h;
4172 char *dot_name;
4173 size_t len;
4174
4175 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4176 if (h != NULL
4177 /* Don't return this sym if it is a fake function descriptor
4178 created by add_symbol_adjust. */
4179 && !(h->root.type == bfd_link_hash_undefweak
4180 && ((struct ppc_link_hash_entry *) h)->fake))
4181 return h;
4182
4183 if (name[0] == '.')
4184 return h;
4185
4186 len = strlen (name);
4187 dot_name = bfd_alloc (abfd, len + 2);
4188 if (dot_name == NULL)
4189 return (struct elf_link_hash_entry *) 0 - 1;
4190 dot_name[0] = '.';
4191 memcpy (dot_name + 1, name, len + 1);
4192 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4193 bfd_release (abfd, dot_name);
4194 return h;
4195 }
4196
4197 /* This function satisfies all old ABI object references to ".bar" if a
4198 new ABI object defines "bar". Well, at least, undefined dot symbols
4199 are made weak. This stops later archive searches from including an
4200 object if we already have a function descriptor definition. It also
4201 prevents the linker complaining about undefined symbols.
4202 We also check and correct mismatched symbol visibility here. The
4203 most restrictive visibility of the function descriptor and the
4204 function entry symbol is used. */
4205
4206 static bfd_boolean
4207 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4208 {
4209 struct ppc_link_hash_table *htab;
4210 struct ppc_link_hash_entry *fdh;
4211
4212 if (eh->elf.root.type == bfd_link_hash_indirect)
4213 return TRUE;
4214
4215 if (eh->elf.root.type == bfd_link_hash_warning)
4216 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4217
4218 if (eh->elf.root.root.string[0] != '.')
4219 abort ();
4220
4221 htab = ppc_hash_table (info);
4222 fdh = get_fdh (eh, htab);
4223 if (fdh == NULL
4224 && !info->relocatable
4225 && (eh->elf.root.type == bfd_link_hash_undefined
4226 || eh->elf.root.type == bfd_link_hash_undefweak)
4227 && eh->elf.ref_regular)
4228 {
4229 /* Make an undefweak function descriptor sym, which is enough to
4230 pull in an --as-needed shared lib, but won't cause link
4231 errors. Archives are handled elsewhere. */
4232 fdh = make_fdh (info, eh);
4233 if (fdh == NULL)
4234 return FALSE;
4235 else
4236 fdh->elf.ref_regular = 1;
4237 }
4238 else if (fdh != NULL)
4239 {
4240 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4241 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4242 if (entry_vis < descr_vis)
4243 fdh->elf.other += entry_vis - descr_vis;
4244 else if (entry_vis > descr_vis)
4245 eh->elf.other += descr_vis - entry_vis;
4246
4247 if ((fdh->elf.root.type == bfd_link_hash_defined
4248 || fdh->elf.root.type == bfd_link_hash_defweak)
4249 && eh->elf.root.type == bfd_link_hash_undefined)
4250 {
4251 eh->elf.root.type = bfd_link_hash_undefweak;
4252 eh->was_undefined = 1;
4253 htab->twiddled_syms = 1;
4254 }
4255 }
4256
4257 return TRUE;
4258 }
4259
4260 /* Process list of dot-symbols we made in link_hash_newfunc. */
4261
4262 static bfd_boolean
4263 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4264 {
4265 struct ppc_link_hash_table *htab;
4266 struct ppc_link_hash_entry **p, *eh;
4267
4268 htab = ppc_hash_table (info);
4269 if (!is_ppc64_elf_target (htab->elf.root.creator))
4270 return TRUE;
4271
4272 if (is_ppc64_elf_target (ibfd->xvec))
4273 {
4274 p = &htab->dot_syms;
4275 while ((eh = *p) != NULL)
4276 {
4277 *p = NULL;
4278 if (!add_symbol_adjust (eh, info))
4279 return FALSE;
4280 p = &eh->u.next_dot_sym;
4281 }
4282 }
4283
4284 /* Clear the list for non-ppc64 input files. */
4285 p = &htab->dot_syms;
4286 while ((eh = *p) != NULL)
4287 {
4288 *p = NULL;
4289 p = &eh->u.next_dot_sym;
4290 }
4291
4292 /* We need to fix the undefs list for any syms we have twiddled to
4293 undef_weak. */
4294 if (htab->twiddled_syms)
4295 {
4296 bfd_link_repair_undef_list (&htab->elf.root);
4297 htab->twiddled_syms = 0;
4298 }
4299 return TRUE;
4300 }
4301
4302 /* Undo hash table changes when an --as-needed input file is determined
4303 not to be needed. */
4304
4305 static bfd_boolean
4306 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4307 struct bfd_link_info *info)
4308 {
4309 ppc_hash_table (info)->dot_syms = NULL;
4310 return TRUE;
4311 }
4312
4313 static bfd_boolean
4314 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4315 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4316 {
4317 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4318 char *local_got_tls_masks;
4319
4320 if (local_got_ents == NULL)
4321 {
4322 bfd_size_type size = symtab_hdr->sh_info;
4323
4324 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4325 local_got_ents = bfd_zalloc (abfd, size);
4326 if (local_got_ents == NULL)
4327 return FALSE;
4328 elf_local_got_ents (abfd) = local_got_ents;
4329 }
4330
4331 if ((tls_type & TLS_EXPLICIT) == 0)
4332 {
4333 struct got_entry *ent;
4334
4335 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4336 if (ent->addend == r_addend
4337 && ent->owner == abfd
4338 && ent->tls_type == tls_type)
4339 break;
4340 if (ent == NULL)
4341 {
4342 bfd_size_type amt = sizeof (*ent);
4343 ent = bfd_alloc (abfd, amt);
4344 if (ent == NULL)
4345 return FALSE;
4346 ent->next = local_got_ents[r_symndx];
4347 ent->addend = r_addend;
4348 ent->owner = abfd;
4349 ent->tls_type = tls_type;
4350 ent->got.refcount = 0;
4351 local_got_ents[r_symndx] = ent;
4352 }
4353 ent->got.refcount += 1;
4354 }
4355
4356 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4357 local_got_tls_masks[r_symndx] |= tls_type;
4358 return TRUE;
4359 }
4360
4361 static bfd_boolean
4362 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4363 {
4364 struct plt_entry *ent;
4365
4366 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4367 if (ent->addend == addend)
4368 break;
4369 if (ent == NULL)
4370 {
4371 bfd_size_type amt = sizeof (*ent);
4372 ent = bfd_alloc (abfd, amt);
4373 if (ent == NULL)
4374 return FALSE;
4375 ent->next = eh->elf.plt.plist;
4376 ent->addend = addend;
4377 ent->plt.refcount = 0;
4378 eh->elf.plt.plist = ent;
4379 }
4380 ent->plt.refcount += 1;
4381 eh->elf.needs_plt = 1;
4382 if (eh->elf.root.root.string[0] == '.'
4383 && eh->elf.root.root.string[1] != '\0')
4384 eh->is_func = 1;
4385 return TRUE;
4386 }
4387
4388 /* Look through the relocs for a section during the first phase, and
4389 calculate needed space in the global offset table, procedure
4390 linkage table, and dynamic reloc sections. */
4391
4392 static bfd_boolean
4393 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4394 asection *sec, const Elf_Internal_Rela *relocs)
4395 {
4396 struct ppc_link_hash_table *htab;
4397 Elf_Internal_Shdr *symtab_hdr;
4398 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4399 const Elf_Internal_Rela *rel;
4400 const Elf_Internal_Rela *rel_end;
4401 asection *sreloc;
4402 asection **opd_sym_map;
4403
4404 if (info->relocatable)
4405 return TRUE;
4406
4407 /* Don't do anything special with non-loaded, non-alloced sections.
4408 In particular, any relocs in such sections should not affect GOT
4409 and PLT reference counting (ie. we don't allow them to create GOT
4410 or PLT entries), there's no possibility or desire to optimize TLS
4411 relocs, and there's not much point in propagating relocs to shared
4412 libs that the dynamic linker won't relocate. */
4413 if ((sec->flags & SEC_ALLOC) == 0)
4414 return TRUE;
4415
4416 htab = ppc_hash_table (info);
4417 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4418
4419 sym_hashes = elf_sym_hashes (abfd);
4420 sym_hashes_end = (sym_hashes
4421 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4422 - symtab_hdr->sh_info);
4423
4424 sreloc = NULL;
4425 opd_sym_map = NULL;
4426 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4427 {
4428 /* Garbage collection needs some extra help with .opd sections.
4429 We don't want to necessarily keep everything referenced by
4430 relocs in .opd, as that would keep all functions. Instead,
4431 if we reference an .opd symbol (a function descriptor), we
4432 want to keep the function code symbol's section. This is
4433 easy for global symbols, but for local syms we need to keep
4434 information about the associated function section. Later, if
4435 edit_opd deletes entries, we'll use this array to adjust
4436 local syms in .opd. */
4437 union opd_info {
4438 asection *func_section;
4439 long entry_adjust;
4440 };
4441 bfd_size_type amt;
4442
4443 amt = sec->size * sizeof (union opd_info) / 8;
4444 opd_sym_map = bfd_zalloc (abfd, amt);
4445 if (opd_sym_map == NULL)
4446 return FALSE;
4447 ppc64_elf_section_data (sec)->u.opd_func_sec = opd_sym_map;
4448 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4449 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4450 }
4451
4452 if (htab->sfpr == NULL
4453 && !create_linkage_sections (htab->elf.dynobj, info))
4454 return FALSE;
4455
4456 rel_end = relocs + sec->reloc_count;
4457 for (rel = relocs; rel < rel_end; rel++)
4458 {
4459 unsigned long r_symndx;
4460 struct elf_link_hash_entry *h;
4461 enum elf_ppc64_reloc_type r_type;
4462 int tls_type = 0;
4463 struct _ppc64_elf_section_data *ppc64_sec;
4464
4465 r_symndx = ELF64_R_SYM (rel->r_info);
4466 if (r_symndx < symtab_hdr->sh_info)
4467 h = NULL;
4468 else
4469 {
4470 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4471 while (h->root.type == bfd_link_hash_indirect
4472 || h->root.type == bfd_link_hash_warning)
4473 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4474 }
4475
4476 r_type = ELF64_R_TYPE (rel->r_info);
4477 switch (r_type)
4478 {
4479 case R_PPC64_GOT_TLSLD16:
4480 case R_PPC64_GOT_TLSLD16_LO:
4481 case R_PPC64_GOT_TLSLD16_HI:
4482 case R_PPC64_GOT_TLSLD16_HA:
4483 ppc64_tlsld_got (abfd)->refcount += 1;
4484 tls_type = TLS_TLS | TLS_LD;
4485 goto dogottls;
4486
4487 case R_PPC64_GOT_TLSGD16:
4488 case R_PPC64_GOT_TLSGD16_LO:
4489 case R_PPC64_GOT_TLSGD16_HI:
4490 case R_PPC64_GOT_TLSGD16_HA:
4491 tls_type = TLS_TLS | TLS_GD;
4492 goto dogottls;
4493
4494 case R_PPC64_GOT_TPREL16_DS:
4495 case R_PPC64_GOT_TPREL16_LO_DS:
4496 case R_PPC64_GOT_TPREL16_HI:
4497 case R_PPC64_GOT_TPREL16_HA:
4498 if (info->shared)
4499 info->flags |= DF_STATIC_TLS;
4500 tls_type = TLS_TLS | TLS_TPREL;
4501 goto dogottls;
4502
4503 case R_PPC64_GOT_DTPREL16_DS:
4504 case R_PPC64_GOT_DTPREL16_LO_DS:
4505 case R_PPC64_GOT_DTPREL16_HI:
4506 case R_PPC64_GOT_DTPREL16_HA:
4507 tls_type = TLS_TLS | TLS_DTPREL;
4508 dogottls:
4509 sec->has_tls_reloc = 1;
4510 /* Fall thru */
4511
4512 case R_PPC64_GOT16:
4513 case R_PPC64_GOT16_DS:
4514 case R_PPC64_GOT16_HA:
4515 case R_PPC64_GOT16_HI:
4516 case R_PPC64_GOT16_LO:
4517 case R_PPC64_GOT16_LO_DS:
4518 /* This symbol requires a global offset table entry. */
4519 sec->has_toc_reloc = 1;
4520 if (ppc64_elf_tdata (abfd)->got == NULL
4521 && !create_got_section (abfd, info))
4522 return FALSE;
4523
4524 if (h != NULL)
4525 {
4526 struct ppc_link_hash_entry *eh;
4527 struct got_entry *ent;
4528
4529 eh = (struct ppc_link_hash_entry *) h;
4530 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4531 if (ent->addend == rel->r_addend
4532 && ent->owner == abfd
4533 && ent->tls_type == tls_type)
4534 break;
4535 if (ent == NULL)
4536 {
4537 bfd_size_type amt = sizeof (*ent);
4538 ent = bfd_alloc (abfd, amt);
4539 if (ent == NULL)
4540 return FALSE;
4541 ent->next = eh->elf.got.glist;
4542 ent->addend = rel->r_addend;
4543 ent->owner = abfd;
4544 ent->tls_type = tls_type;
4545 ent->got.refcount = 0;
4546 eh->elf.got.glist = ent;
4547 }
4548 ent->got.refcount += 1;
4549 eh->tls_mask |= tls_type;
4550 }
4551 else
4552 /* This is a global offset table entry for a local symbol. */
4553 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4554 rel->r_addend, tls_type))
4555 return FALSE;
4556 break;
4557
4558 case R_PPC64_PLT16_HA:
4559 case R_PPC64_PLT16_HI:
4560 case R_PPC64_PLT16_LO:
4561 case R_PPC64_PLT32:
4562 case R_PPC64_PLT64:
4563 /* This symbol requires a procedure linkage table entry. We
4564 actually build the entry in adjust_dynamic_symbol,
4565 because this might be a case of linking PIC code without
4566 linking in any dynamic objects, in which case we don't
4567 need to generate a procedure linkage table after all. */
4568 if (h == NULL)
4569 {
4570 /* It does not make sense to have a procedure linkage
4571 table entry for a local symbol. */
4572 bfd_set_error (bfd_error_bad_value);
4573 return FALSE;
4574 }
4575 else
4576 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4577 rel->r_addend))
4578 return FALSE;
4579 break;
4580
4581 /* The following relocations don't need to propagate the
4582 relocation if linking a shared object since they are
4583 section relative. */
4584 case R_PPC64_SECTOFF:
4585 case R_PPC64_SECTOFF_LO:
4586 case R_PPC64_SECTOFF_HI:
4587 case R_PPC64_SECTOFF_HA:
4588 case R_PPC64_SECTOFF_DS:
4589 case R_PPC64_SECTOFF_LO_DS:
4590 case R_PPC64_DTPREL16:
4591 case R_PPC64_DTPREL16_LO:
4592 case R_PPC64_DTPREL16_HI:
4593 case R_PPC64_DTPREL16_HA:
4594 case R_PPC64_DTPREL16_DS:
4595 case R_PPC64_DTPREL16_LO_DS:
4596 case R_PPC64_DTPREL16_HIGHER:
4597 case R_PPC64_DTPREL16_HIGHERA:
4598 case R_PPC64_DTPREL16_HIGHEST:
4599 case R_PPC64_DTPREL16_HIGHESTA:
4600 break;
4601
4602 /* Nor do these. */
4603 case R_PPC64_TOC16:
4604 case R_PPC64_TOC16_LO:
4605 case R_PPC64_TOC16_HI:
4606 case R_PPC64_TOC16_HA:
4607 case R_PPC64_TOC16_DS:
4608 case R_PPC64_TOC16_LO_DS:
4609 sec->has_toc_reloc = 1;
4610 break;
4611
4612 /* This relocation describes the C++ object vtable hierarchy.
4613 Reconstruct it for later use during GC. */
4614 case R_PPC64_GNU_VTINHERIT:
4615 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4616 return FALSE;
4617 break;
4618
4619 /* This relocation describes which C++ vtable entries are actually
4620 used. Record for later use during GC. */
4621 case R_PPC64_GNU_VTENTRY:
4622 BFD_ASSERT (h != NULL);
4623 if (h != NULL
4624 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4625 return FALSE;
4626 break;
4627
4628 case R_PPC64_REL14:
4629 case R_PPC64_REL14_BRTAKEN:
4630 case R_PPC64_REL14_BRNTAKEN:
4631 {
4632 asection *dest = NULL;
4633
4634 /* Heuristic: If jumping outside our section, chances are
4635 we are going to need a stub. */
4636 if (h != NULL)
4637 {
4638 /* If the sym is weak it may be overridden later, so
4639 don't assume we know where a weak sym lives. */
4640 if (h->root.type == bfd_link_hash_defined)
4641 dest = h->root.u.def.section;
4642 }
4643 else
4644 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4645 sec, r_symndx);
4646 if (dest != sec)
4647 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4648 }
4649 /* Fall through. */
4650
4651 case R_PPC64_REL24:
4652 if (h != NULL)
4653 {
4654 /* We may need a .plt entry if the function this reloc
4655 refers to is in a shared lib. */
4656 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4657 rel->r_addend))
4658 return FALSE;
4659 if (h == &htab->tls_get_addr->elf
4660 || h == &htab->tls_get_addr_fd->elf)
4661 sec->has_tls_reloc = 1;
4662 else if (htab->tls_get_addr == NULL
4663 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4664 && (h->root.root.string[15] == 0
4665 || h->root.root.string[15] == '@'))
4666 {
4667 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4668 sec->has_tls_reloc = 1;
4669 }
4670 else if (htab->tls_get_addr_fd == NULL
4671 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4672 && (h->root.root.string[14] == 0
4673 || h->root.root.string[14] == '@'))
4674 {
4675 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4676 sec->has_tls_reloc = 1;
4677 }
4678 }
4679 break;
4680
4681 case R_PPC64_TPREL64:
4682 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4683 if (info->shared)
4684 info->flags |= DF_STATIC_TLS;
4685 goto dotlstoc;
4686
4687 case R_PPC64_DTPMOD64:
4688 if (rel + 1 < rel_end
4689 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4690 && rel[1].r_offset == rel->r_offset + 8)
4691 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4692 else
4693 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4694 goto dotlstoc;
4695
4696 case R_PPC64_DTPREL64:
4697 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4698 if (rel != relocs
4699 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4700 && rel[-1].r_offset == rel->r_offset - 8)
4701 /* This is the second reloc of a dtpmod, dtprel pair.
4702 Don't mark with TLS_DTPREL. */
4703 goto dodyn;
4704
4705 dotlstoc:
4706 sec->has_tls_reloc = 1;
4707 if (h != NULL)
4708 {
4709 struct ppc_link_hash_entry *eh;
4710 eh = (struct ppc_link_hash_entry *) h;
4711 eh->tls_mask |= tls_type;
4712 }
4713 else
4714 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4715 rel->r_addend, tls_type))
4716 return FALSE;
4717
4718 ppc64_sec = ppc64_elf_section_data (sec);
4719 if (ppc64_sec->sec_type != sec_toc)
4720 {
4721 /* One extra to simplify get_tls_mask. */
4722 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4723 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4724 if (ppc64_sec->u.t_symndx == NULL)
4725 return FALSE;
4726 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4727 ppc64_sec->sec_type = sec_toc;
4728 }
4729 BFD_ASSERT (rel->r_offset % 8 == 0);
4730 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4731
4732 /* Mark the second slot of a GD or LD entry.
4733 -1 to indicate GD and -2 to indicate LD. */
4734 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4735 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4736 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4737 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4738 goto dodyn;
4739
4740 case R_PPC64_TPREL16:
4741 case R_PPC64_TPREL16_LO:
4742 case R_PPC64_TPREL16_HI:
4743 case R_PPC64_TPREL16_HA:
4744 case R_PPC64_TPREL16_DS:
4745 case R_PPC64_TPREL16_LO_DS:
4746 case R_PPC64_TPREL16_HIGHER:
4747 case R_PPC64_TPREL16_HIGHERA:
4748 case R_PPC64_TPREL16_HIGHEST:
4749 case R_PPC64_TPREL16_HIGHESTA:
4750 if (info->shared)
4751 {
4752 info->flags |= DF_STATIC_TLS;
4753 goto dodyn;
4754 }
4755 break;
4756
4757 case R_PPC64_ADDR64:
4758 if (opd_sym_map != NULL
4759 && rel + 1 < rel_end
4760 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4761 {
4762 if (h != NULL)
4763 {
4764 if (h->root.root.string[0] == '.'
4765 && h->root.root.string[1] != 0
4766 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4767 ;
4768 else
4769 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4770 }
4771 else
4772 {
4773 asection *s;
4774
4775 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4776 r_symndx);
4777 if (s == NULL)
4778 return FALSE;
4779 else if (s != sec)
4780 opd_sym_map[rel->r_offset / 8] = s;
4781 }
4782 }
4783 /* Fall through. */
4784
4785 case R_PPC64_REL30:
4786 case R_PPC64_REL32:
4787 case R_PPC64_REL64:
4788 case R_PPC64_ADDR14:
4789 case R_PPC64_ADDR14_BRNTAKEN:
4790 case R_PPC64_ADDR14_BRTAKEN:
4791 case R_PPC64_ADDR16:
4792 case R_PPC64_ADDR16_DS:
4793 case R_PPC64_ADDR16_HA:
4794 case R_PPC64_ADDR16_HI:
4795 case R_PPC64_ADDR16_HIGHER:
4796 case R_PPC64_ADDR16_HIGHERA:
4797 case R_PPC64_ADDR16_HIGHEST:
4798 case R_PPC64_ADDR16_HIGHESTA:
4799 case R_PPC64_ADDR16_LO:
4800 case R_PPC64_ADDR16_LO_DS:
4801 case R_PPC64_ADDR24:
4802 case R_PPC64_ADDR32:
4803 case R_PPC64_UADDR16:
4804 case R_PPC64_UADDR32:
4805 case R_PPC64_UADDR64:
4806 case R_PPC64_TOC:
4807 if (h != NULL && !info->shared)
4808 /* We may need a copy reloc. */
4809 h->non_got_ref = 1;
4810
4811 /* Don't propagate .opd relocs. */
4812 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4813 break;
4814
4815 /* If we are creating a shared library, and this is a reloc
4816 against a global symbol, or a non PC relative reloc
4817 against a local symbol, then we need to copy the reloc
4818 into the shared library. However, if we are linking with
4819 -Bsymbolic, we do not need to copy a reloc against a
4820 global symbol which is defined in an object we are
4821 including in the link (i.e., DEF_REGULAR is set). At
4822 this point we have not seen all the input files, so it is
4823 possible that DEF_REGULAR is not set now but will be set
4824 later (it is never cleared). In case of a weak definition,
4825 DEF_REGULAR may be cleared later by a strong definition in
4826 a shared library. We account for that possibility below by
4827 storing information in the dyn_relocs field of the hash
4828 table entry. A similar situation occurs when creating
4829 shared libraries and symbol visibility changes render the
4830 symbol local.
4831
4832 If on the other hand, we are creating an executable, we
4833 may need to keep relocations for symbols satisfied by a
4834 dynamic library if we manage to avoid copy relocs for the
4835 symbol. */
4836 dodyn:
4837 if ((info->shared
4838 && (MUST_BE_DYN_RELOC (r_type)
4839 || (h != NULL
4840 && (! info->symbolic
4841 || h->root.type == bfd_link_hash_defweak
4842 || !h->def_regular))))
4843 || (ELIMINATE_COPY_RELOCS
4844 && !info->shared
4845 && h != NULL
4846 && (h->root.type == bfd_link_hash_defweak
4847 || !h->def_regular)))
4848 {
4849 struct ppc_dyn_relocs *p;
4850 struct ppc_dyn_relocs **head;
4851
4852 /* We must copy these reloc types into the output file.
4853 Create a reloc section in dynobj and make room for
4854 this reloc. */
4855 if (sreloc == NULL)
4856 {
4857 const char *name;
4858 bfd *dynobj;
4859
4860 name = (bfd_elf_string_from_elf_section
4861 (abfd,
4862 elf_elfheader (abfd)->e_shstrndx,
4863 elf_section_data (sec)->rel_hdr.sh_name));
4864 if (name == NULL)
4865 return FALSE;
4866
4867 if (! CONST_STRNEQ (name, ".rela")
4868 || strcmp (bfd_get_section_name (abfd, sec),
4869 name + 5) != 0)
4870 {
4871 (*_bfd_error_handler)
4872 (_("%B: bad relocation section name `%s\'"),
4873 abfd, name);
4874 bfd_set_error (bfd_error_bad_value);
4875 }
4876
4877 dynobj = htab->elf.dynobj;
4878 sreloc = bfd_get_section_by_name (dynobj, name);
4879 if (sreloc == NULL)
4880 {
4881 flagword flags;
4882
4883 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4884 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4885 | SEC_ALLOC | SEC_LOAD);
4886 sreloc = bfd_make_section_with_flags (dynobj,
4887 name,
4888 flags);
4889 if (sreloc == NULL
4890 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4891 return FALSE;
4892 }
4893 elf_section_data (sec)->sreloc = sreloc;
4894 }
4895
4896 /* If this is a global symbol, we count the number of
4897 relocations we need for this symbol. */
4898 if (h != NULL)
4899 {
4900 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4901 }
4902 else
4903 {
4904 /* Track dynamic relocs needed for local syms too.
4905 We really need local syms available to do this
4906 easily. Oh well. */
4907
4908 asection *s;
4909 void *vpp;
4910
4911 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4912 sec, r_symndx);
4913 if (s == NULL)
4914 return FALSE;
4915
4916 vpp = &elf_section_data (s)->local_dynrel;
4917 head = (struct ppc_dyn_relocs **) vpp;
4918 }
4919
4920 p = *head;
4921 if (p == NULL || p->sec != sec)
4922 {
4923 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4924 if (p == NULL)
4925 return FALSE;
4926 p->next = *head;
4927 *head = p;
4928 p->sec = sec;
4929 p->count = 0;
4930 p->pc_count = 0;
4931 }
4932
4933 p->count += 1;
4934 if (!MUST_BE_DYN_RELOC (r_type))
4935 p->pc_count += 1;
4936 }
4937 break;
4938
4939 default:
4940 break;
4941 }
4942 }
4943
4944 return TRUE;
4945 }
4946
4947 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4948 of the code entry point, and its section. */
4949
4950 static bfd_vma
4951 opd_entry_value (asection *opd_sec,
4952 bfd_vma offset,
4953 asection **code_sec,
4954 bfd_vma *code_off)
4955 {
4956 bfd *opd_bfd = opd_sec->owner;
4957 Elf_Internal_Rela *relocs;
4958 Elf_Internal_Rela *lo, *hi, *look;
4959 bfd_vma val;
4960
4961 /* No relocs implies we are linking a --just-symbols object. */
4962 if (opd_sec->reloc_count == 0)
4963 {
4964 bfd_vma val;
4965
4966 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4967 return (bfd_vma) -1;
4968
4969 if (code_sec != NULL)
4970 {
4971 asection *sec, *likely = NULL;
4972 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4973 if (sec->vma <= val
4974 && (sec->flags & SEC_LOAD) != 0
4975 && (sec->flags & SEC_ALLOC) != 0)
4976 likely = sec;
4977 if (likely != NULL)
4978 {
4979 *code_sec = likely;
4980 if (code_off != NULL)
4981 *code_off = val - likely->vma;
4982 }
4983 }
4984 return val;
4985 }
4986
4987 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4988 if (relocs == NULL)
4989 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4990
4991 /* Go find the opd reloc at the sym address. */
4992 lo = relocs;
4993 BFD_ASSERT (lo != NULL);
4994 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4995 val = (bfd_vma) -1;
4996 while (lo < hi)
4997 {
4998 look = lo + (hi - lo) / 2;
4999 if (look->r_offset < offset)
5000 lo = look + 1;
5001 else if (look->r_offset > offset)
5002 hi = look;
5003 else
5004 {
5005 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
5006 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5007 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5008 {
5009 unsigned long symndx = ELF64_R_SYM (look->r_info);
5010 asection *sec;
5011
5012 if (symndx < symtab_hdr->sh_info)
5013 {
5014 Elf_Internal_Sym *sym;
5015
5016 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5017 if (sym == NULL)
5018 {
5019 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5020 symtab_hdr->sh_info,
5021 0, NULL, NULL, NULL);
5022 if (sym == NULL)
5023 break;
5024 symtab_hdr->contents = (bfd_byte *) sym;
5025 }
5026
5027 sym += symndx;
5028 val = sym->st_value;
5029 sec = NULL;
5030 if ((sym->st_shndx != SHN_UNDEF
5031 && sym->st_shndx < SHN_LORESERVE)
5032 || sym->st_shndx > SHN_HIRESERVE)
5033 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5034 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5035 }
5036 else
5037 {
5038 struct elf_link_hash_entry **sym_hashes;
5039 struct elf_link_hash_entry *rh;
5040
5041 sym_hashes = elf_sym_hashes (opd_bfd);
5042 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5043 while (rh->root.type == bfd_link_hash_indirect
5044 || rh->root.type == bfd_link_hash_warning)
5045 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5046 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5047 || rh->root.type == bfd_link_hash_defweak);
5048 val = rh->root.u.def.value;
5049 sec = rh->root.u.def.section;
5050 }
5051 val += look->r_addend;
5052 if (code_off != NULL)
5053 *code_off = val;
5054 if (code_sec != NULL)
5055 *code_sec = sec;
5056 if (sec != NULL && sec->output_section != NULL)
5057 val += sec->output_section->vma + sec->output_offset;
5058 }
5059 break;
5060 }
5061 }
5062
5063 return val;
5064 }
5065
5066 /* Mark sections containing dynamically referenced symbols. When
5067 building shared libraries, we must assume that any visible symbol is
5068 referenced. */
5069
5070 static bfd_boolean
5071 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5072 {
5073 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5074 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5075
5076 if (eh->elf.root.type == bfd_link_hash_warning)
5077 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5078
5079 /* Dynamic linking info is on the func descriptor sym. */
5080 if (eh->oh != NULL
5081 && eh->oh->is_func_descriptor
5082 && (eh->oh->elf.root.type == bfd_link_hash_defined
5083 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5084 eh = eh->oh;
5085
5086 if ((eh->elf.root.type == bfd_link_hash_defined
5087 || eh->elf.root.type == bfd_link_hash_defweak)
5088 && (eh->elf.ref_dynamic
5089 || (!info->executable
5090 && eh->elf.def_regular
5091 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5092 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5093 {
5094 asection *code_sec;
5095
5096 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5097
5098 /* Function descriptor syms cause the associated
5099 function code sym section to be marked. */
5100 if (eh->is_func_descriptor
5101 && (eh->oh->elf.root.type == bfd_link_hash_defined
5102 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5103 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5104 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5105 && opd_entry_value (eh->elf.root.u.def.section,
5106 eh->elf.root.u.def.value,
5107 &code_sec, NULL) != (bfd_vma) -1)
5108 code_sec->flags |= SEC_KEEP;
5109 }
5110
5111 return TRUE;
5112 }
5113
5114 /* Return the section that should be marked against GC for a given
5115 relocation. */
5116
5117 static asection *
5118 ppc64_elf_gc_mark_hook (asection *sec,
5119 struct bfd_link_info *info,
5120 Elf_Internal_Rela *rel,
5121 struct elf_link_hash_entry *h,
5122 Elf_Internal_Sym *sym)
5123 {
5124 asection *rsec;
5125
5126 /* First mark all our entry sym sections. */
5127 if (info->gc_sym_list != NULL)
5128 {
5129 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5130 struct bfd_sym_chain *sym = info->gc_sym_list;
5131
5132 info->gc_sym_list = NULL;
5133 for (; sym != NULL; sym = sym->next)
5134 {
5135 struct ppc_link_hash_entry *eh;
5136
5137 eh = (struct ppc_link_hash_entry *)
5138 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5139 if (eh == NULL)
5140 continue;
5141 if (eh->elf.root.type != bfd_link_hash_defined
5142 && eh->elf.root.type != bfd_link_hash_defweak)
5143 continue;
5144
5145 if (eh->is_func_descriptor
5146 && (eh->oh->elf.root.type == bfd_link_hash_defined
5147 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5148 rsec = eh->oh->elf.root.u.def.section;
5149 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5150 && opd_entry_value (eh->elf.root.u.def.section,
5151 eh->elf.root.u.def.value,
5152 &rsec, NULL) != (bfd_vma) -1)
5153 ;
5154 else
5155 continue;
5156
5157 if (!rsec->gc_mark)
5158 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5159
5160 rsec = eh->elf.root.u.def.section;
5161 if (!rsec->gc_mark)
5162 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5163 }
5164 }
5165
5166 /* Syms return NULL if we're marking .opd, so we avoid marking all
5167 function sections, as all functions are referenced in .opd. */
5168 rsec = NULL;
5169 if (get_opd_info (sec) != NULL)
5170 return rsec;
5171
5172 if (h != NULL)
5173 {
5174 enum elf_ppc64_reloc_type r_type;
5175 struct ppc_link_hash_entry *eh;
5176
5177 r_type = ELF64_R_TYPE (rel->r_info);
5178 switch (r_type)
5179 {
5180 case R_PPC64_GNU_VTINHERIT:
5181 case R_PPC64_GNU_VTENTRY:
5182 break;
5183
5184 default:
5185 switch (h->root.type)
5186 {
5187 case bfd_link_hash_defined:
5188 case bfd_link_hash_defweak:
5189 eh = (struct ppc_link_hash_entry *) h;
5190 if (eh->oh != NULL
5191 && eh->oh->is_func_descriptor
5192 && (eh->oh->elf.root.type == bfd_link_hash_defined
5193 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5194 eh = eh->oh;
5195
5196 /* Function descriptor syms cause the associated
5197 function code sym section to be marked. */
5198 if (eh->is_func_descriptor
5199 && (eh->oh->elf.root.type == bfd_link_hash_defined
5200 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5201 {
5202 /* They also mark their opd section. */
5203 if (!eh->elf.root.u.def.section->gc_mark)
5204 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5205 ppc64_elf_gc_mark_hook);
5206
5207 rsec = eh->oh->elf.root.u.def.section;
5208 }
5209 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5210 && opd_entry_value (eh->elf.root.u.def.section,
5211 eh->elf.root.u.def.value,
5212 &rsec, NULL) != (bfd_vma) -1)
5213 {
5214 if (!eh->elf.root.u.def.section->gc_mark)
5215 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5216 ppc64_elf_gc_mark_hook);
5217 }
5218 else
5219 rsec = h->root.u.def.section;
5220 break;
5221
5222 case bfd_link_hash_common:
5223 rsec = h->root.u.c.p->section;
5224 break;
5225
5226 default:
5227 break;
5228 }
5229 }
5230 }
5231 else
5232 {
5233 asection **opd_sym_section;
5234
5235 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5236 opd_sym_section = get_opd_info (rsec);
5237 if (opd_sym_section != NULL)
5238 {
5239 if (!rsec->gc_mark)
5240 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5241
5242 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5243 }
5244 }
5245
5246 return rsec;
5247 }
5248
5249 /* Update the .got, .plt. and dynamic reloc reference counts for the
5250 section being removed. */
5251
5252 static bfd_boolean
5253 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5254 asection *sec, const Elf_Internal_Rela *relocs)
5255 {
5256 struct ppc_link_hash_table *htab;
5257 Elf_Internal_Shdr *symtab_hdr;
5258 struct elf_link_hash_entry **sym_hashes;
5259 struct got_entry **local_got_ents;
5260 const Elf_Internal_Rela *rel, *relend;
5261
5262 if ((sec->flags & SEC_ALLOC) == 0)
5263 return TRUE;
5264
5265 elf_section_data (sec)->local_dynrel = NULL;
5266
5267 htab = ppc_hash_table (info);
5268 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5269 sym_hashes = elf_sym_hashes (abfd);
5270 local_got_ents = elf_local_got_ents (abfd);
5271
5272 relend = relocs + sec->reloc_count;
5273 for (rel = relocs; rel < relend; rel++)
5274 {
5275 unsigned long r_symndx;
5276 enum elf_ppc64_reloc_type r_type;
5277 struct elf_link_hash_entry *h = NULL;
5278 char tls_type = 0;
5279
5280 r_symndx = ELF64_R_SYM (rel->r_info);
5281 r_type = ELF64_R_TYPE (rel->r_info);
5282 if (r_symndx >= symtab_hdr->sh_info)
5283 {
5284 struct ppc_link_hash_entry *eh;
5285 struct ppc_dyn_relocs **pp;
5286 struct ppc_dyn_relocs *p;
5287
5288 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5289 while (h->root.type == bfd_link_hash_indirect
5290 || h->root.type == bfd_link_hash_warning)
5291 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5292 eh = (struct ppc_link_hash_entry *) h;
5293
5294 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5295 if (p->sec == sec)
5296 {
5297 /* Everything must go for SEC. */
5298 *pp = p->next;
5299 break;
5300 }
5301 }
5302
5303 switch (r_type)
5304 {
5305 case R_PPC64_GOT_TLSLD16:
5306 case R_PPC64_GOT_TLSLD16_LO:
5307 case R_PPC64_GOT_TLSLD16_HI:
5308 case R_PPC64_GOT_TLSLD16_HA:
5309 ppc64_tlsld_got (abfd)->refcount -= 1;
5310 tls_type = TLS_TLS | TLS_LD;
5311 goto dogot;
5312
5313 case R_PPC64_GOT_TLSGD16:
5314 case R_PPC64_GOT_TLSGD16_LO:
5315 case R_PPC64_GOT_TLSGD16_HI:
5316 case R_PPC64_GOT_TLSGD16_HA:
5317 tls_type = TLS_TLS | TLS_GD;
5318 goto dogot;
5319
5320 case R_PPC64_GOT_TPREL16_DS:
5321 case R_PPC64_GOT_TPREL16_LO_DS:
5322 case R_PPC64_GOT_TPREL16_HI:
5323 case R_PPC64_GOT_TPREL16_HA:
5324 tls_type = TLS_TLS | TLS_TPREL;
5325 goto dogot;
5326
5327 case R_PPC64_GOT_DTPREL16_DS:
5328 case R_PPC64_GOT_DTPREL16_LO_DS:
5329 case R_PPC64_GOT_DTPREL16_HI:
5330 case R_PPC64_GOT_DTPREL16_HA:
5331 tls_type = TLS_TLS | TLS_DTPREL;
5332 goto dogot;
5333
5334 case R_PPC64_GOT16:
5335 case R_PPC64_GOT16_DS:
5336 case R_PPC64_GOT16_HA:
5337 case R_PPC64_GOT16_HI:
5338 case R_PPC64_GOT16_LO:
5339 case R_PPC64_GOT16_LO_DS:
5340 dogot:
5341 {
5342 struct got_entry *ent;
5343
5344 if (h != NULL)
5345 ent = h->got.glist;
5346 else
5347 ent = local_got_ents[r_symndx];
5348
5349 for (; ent != NULL; ent = ent->next)
5350 if (ent->addend == rel->r_addend
5351 && ent->owner == abfd
5352 && ent->tls_type == tls_type)
5353 break;
5354 if (ent == NULL)
5355 abort ();
5356 if (ent->got.refcount > 0)
5357 ent->got.refcount -= 1;
5358 }
5359 break;
5360
5361 case R_PPC64_PLT16_HA:
5362 case R_PPC64_PLT16_HI:
5363 case R_PPC64_PLT16_LO:
5364 case R_PPC64_PLT32:
5365 case R_PPC64_PLT64:
5366 case R_PPC64_REL14:
5367 case R_PPC64_REL14_BRNTAKEN:
5368 case R_PPC64_REL14_BRTAKEN:
5369 case R_PPC64_REL24:
5370 if (h != NULL)
5371 {
5372 struct plt_entry *ent;
5373
5374 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5375 if (ent->addend == rel->r_addend)
5376 break;
5377 if (ent == NULL)
5378 abort ();
5379 if (ent->plt.refcount > 0)
5380 ent->plt.refcount -= 1;
5381 }
5382 break;
5383
5384 default:
5385 break;
5386 }
5387 }
5388 return TRUE;
5389 }
5390
5391 /* The maximum size of .sfpr. */
5392 #define SFPR_MAX (218*4)
5393
5394 struct sfpr_def_parms
5395 {
5396 const char name[12];
5397 unsigned char lo, hi;
5398 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5399 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5400 };
5401
5402 /* Auto-generate _save*, _rest* functions in .sfpr. */
5403
5404 static unsigned int
5405 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5406 {
5407 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5408 unsigned int i;
5409 size_t len = strlen (parm->name);
5410 bfd_boolean writing = FALSE;
5411 char sym[16];
5412
5413 memcpy (sym, parm->name, len);
5414 sym[len + 2] = 0;
5415
5416 for (i = parm->lo; i <= parm->hi; i++)
5417 {
5418 struct elf_link_hash_entry *h;
5419
5420 sym[len + 0] = i / 10 + '0';
5421 sym[len + 1] = i % 10 + '0';
5422 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5423 if (h != NULL
5424 && !h->def_regular)
5425 {
5426 h->root.type = bfd_link_hash_defined;
5427 h->root.u.def.section = htab->sfpr;
5428 h->root.u.def.value = htab->sfpr->size;
5429 h->type = STT_FUNC;
5430 h->def_regular = 1;
5431 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5432 writing = TRUE;
5433 if (htab->sfpr->contents == NULL)
5434 {
5435 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5436 if (htab->sfpr->contents == NULL)
5437 return FALSE;
5438 }
5439 }
5440 if (writing)
5441 {
5442 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5443 if (i != parm->hi)
5444 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5445 else
5446 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5447 htab->sfpr->size = p - htab->sfpr->contents;
5448 }
5449 }
5450
5451 return TRUE;
5452 }
5453
5454 static bfd_byte *
5455 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5456 {
5457 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5458 return p + 4;
5459 }
5460
5461 static bfd_byte *
5462 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5463 {
5464 p = savegpr0 (abfd, p, r);
5465 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5466 p = p + 4;
5467 bfd_put_32 (abfd, BLR, p);
5468 return p + 4;
5469 }
5470
5471 static bfd_byte *
5472 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5473 {
5474 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5475 return p + 4;
5476 }
5477
5478 static bfd_byte *
5479 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5480 {
5481 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5482 p = p + 4;
5483 p = restgpr0 (abfd, p, r);
5484 bfd_put_32 (abfd, MTLR_R0, p);
5485 p = p + 4;
5486 if (r == 29)
5487 {
5488 p = restgpr0 (abfd, p, 30);
5489 p = restgpr0 (abfd, p, 31);
5490 }
5491 bfd_put_32 (abfd, BLR, p);
5492 return p + 4;
5493 }
5494
5495 static bfd_byte *
5496 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5497 {
5498 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5499 return p + 4;
5500 }
5501
5502 static bfd_byte *
5503 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5504 {
5505 p = savegpr1 (abfd, p, r);
5506 bfd_put_32 (abfd, BLR, p);
5507 return p + 4;
5508 }
5509
5510 static bfd_byte *
5511 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5512 {
5513 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5514 return p + 4;
5515 }
5516
5517 static bfd_byte *
5518 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5519 {
5520 p = restgpr1 (abfd, p, r);
5521 bfd_put_32 (abfd, BLR, p);
5522 return p + 4;
5523 }
5524
5525 static bfd_byte *
5526 savefpr (bfd *abfd, bfd_byte *p, int r)
5527 {
5528 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5529 return p + 4;
5530 }
5531
5532 static bfd_byte *
5533 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5534 {
5535 p = savefpr (abfd, p, r);
5536 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5537 p = p + 4;
5538 bfd_put_32 (abfd, BLR, p);
5539 return p + 4;
5540 }
5541
5542 static bfd_byte *
5543 restfpr (bfd *abfd, bfd_byte *p, int r)
5544 {
5545 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5546 return p + 4;
5547 }
5548
5549 static bfd_byte *
5550 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5551 {
5552 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5553 p = p + 4;
5554 p = restfpr (abfd, p, r);
5555 bfd_put_32 (abfd, MTLR_R0, p);
5556 p = p + 4;
5557 if (r == 29)
5558 {
5559 p = restfpr (abfd, p, 30);
5560 p = restfpr (abfd, p, 31);
5561 }
5562 bfd_put_32 (abfd, BLR, p);
5563 return p + 4;
5564 }
5565
5566 static bfd_byte *
5567 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5568 {
5569 p = savefpr (abfd, p, r);
5570 bfd_put_32 (abfd, BLR, p);
5571 return p + 4;
5572 }
5573
5574 static bfd_byte *
5575 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5576 {
5577 p = restfpr (abfd, p, r);
5578 bfd_put_32 (abfd, BLR, p);
5579 return p + 4;
5580 }
5581
5582 static bfd_byte *
5583 savevr (bfd *abfd, bfd_byte *p, int r)
5584 {
5585 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5586 p = p + 4;
5587 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5588 return p + 4;
5589 }
5590
5591 static bfd_byte *
5592 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5593 {
5594 p = savevr (abfd, p, r);
5595 bfd_put_32 (abfd, BLR, p);
5596 return p + 4;
5597 }
5598
5599 static bfd_byte *
5600 restvr (bfd *abfd, bfd_byte *p, int r)
5601 {
5602 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5603 p = p + 4;
5604 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5605 return p + 4;
5606 }
5607
5608 static bfd_byte *
5609 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5610 {
5611 p = restvr (abfd, p, r);
5612 bfd_put_32 (abfd, BLR, p);
5613 return p + 4;
5614 }
5615
5616 /* Called via elf_link_hash_traverse to transfer dynamic linking
5617 information on function code symbol entries to their corresponding
5618 function descriptor symbol entries. */
5619
5620 static bfd_boolean
5621 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5622 {
5623 struct bfd_link_info *info;
5624 struct ppc_link_hash_table *htab;
5625 struct plt_entry *ent;
5626 struct ppc_link_hash_entry *fh;
5627 struct ppc_link_hash_entry *fdh;
5628 bfd_boolean force_local;
5629
5630 fh = (struct ppc_link_hash_entry *) h;
5631 if (fh->elf.root.type == bfd_link_hash_indirect)
5632 return TRUE;
5633
5634 if (fh->elf.root.type == bfd_link_hash_warning)
5635 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5636
5637 info = inf;
5638 htab = ppc_hash_table (info);
5639
5640 /* Resolve undefined references to dot-symbols as the value
5641 in the function descriptor, if we have one in a regular object.
5642 This is to satisfy cases like ".quad .foo". Calls to functions
5643 in dynamic objects are handled elsewhere. */
5644 if (fh->elf.root.type == bfd_link_hash_undefweak
5645 && fh->was_undefined
5646 && (fh->oh->elf.root.type == bfd_link_hash_defined
5647 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5648 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5649 && opd_entry_value (fh->oh->elf.root.u.def.section,
5650 fh->oh->elf.root.u.def.value,
5651 &fh->elf.root.u.def.section,
5652 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5653 {
5654 fh->elf.root.type = fh->oh->elf.root.type;
5655 fh->elf.forced_local = 1;
5656 fh->elf.def_regular = fh->oh->elf.def_regular;
5657 fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
5658 }
5659
5660 /* If this is a function code symbol, transfer dynamic linking
5661 information to the function descriptor symbol. */
5662 if (!fh->is_func)
5663 return TRUE;
5664
5665 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5666 if (ent->plt.refcount > 0)
5667 break;
5668 if (ent == NULL
5669 || fh->elf.root.root.string[0] != '.'
5670 || fh->elf.root.root.string[1] == '\0')
5671 return TRUE;
5672
5673 /* Find the corresponding function descriptor symbol. Create it
5674 as undefined if necessary. */
5675
5676 fdh = get_fdh (fh, htab);
5677 if (fdh != NULL)
5678 while (fdh->elf.root.type == bfd_link_hash_indirect
5679 || fdh->elf.root.type == bfd_link_hash_warning)
5680 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5681
5682 if (fdh == NULL
5683 && info->shared
5684 && (fh->elf.root.type == bfd_link_hash_undefined
5685 || fh->elf.root.type == bfd_link_hash_undefweak))
5686 {
5687 fdh = make_fdh (info, fh);
5688 if (fdh == NULL)
5689 return FALSE;
5690 }
5691
5692 /* Fake function descriptors are made undefweak. If the function
5693 code symbol is strong undefined, make the fake sym the same.
5694 If the function code symbol is defined, then force the fake
5695 descriptor local; We can't support overriding of symbols in a
5696 shared library on a fake descriptor. */
5697
5698 if (fdh != NULL
5699 && fdh->fake
5700 && fdh->elf.root.type == bfd_link_hash_undefweak)
5701 {
5702 if (fh->elf.root.type == bfd_link_hash_undefined)
5703 {
5704 fdh->elf.root.type = bfd_link_hash_undefined;
5705 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5706 }
5707 else if (fh->elf.root.type == bfd_link_hash_defined
5708 || fh->elf.root.type == bfd_link_hash_defweak)
5709 {
5710 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5711 }
5712 }
5713
5714 if (fdh != NULL
5715 && !fdh->elf.forced_local
5716 && (info->shared
5717 || fdh->elf.def_dynamic
5718 || fdh->elf.ref_dynamic
5719 || (fdh->elf.root.type == bfd_link_hash_undefweak
5720 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5721 {
5722 if (fdh->elf.dynindx == -1)
5723 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5724 return FALSE;
5725 fdh->elf.ref_regular |= fh->elf.ref_regular;
5726 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5727 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5728 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5729 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5730 {
5731 move_plt_plist (fh, fdh);
5732 fdh->elf.needs_plt = 1;
5733 }
5734 fdh->is_func_descriptor = 1;
5735 fdh->oh = fh;
5736 fh->oh = fdh;
5737 }
5738
5739 /* Now that the info is on the function descriptor, clear the
5740 function code sym info. Any function code syms for which we
5741 don't have a definition in a regular file, we force local.
5742 This prevents a shared library from exporting syms that have
5743 been imported from another library. Function code syms that
5744 are really in the library we must leave global to prevent the
5745 linker dragging in a definition from a static library. */
5746 force_local = (!fh->elf.def_regular
5747 || fdh == NULL
5748 || !fdh->elf.def_regular
5749 || fdh->elf.forced_local);
5750 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5751
5752 return TRUE;
5753 }
5754
5755 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5756 this hook to a) provide some gcc support functions, and b) transfer
5757 dynamic linking information gathered so far on function code symbol
5758 entries, to their corresponding function descriptor symbol entries. */
5759
5760 static bfd_boolean
5761 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5762 struct bfd_link_info *info)
5763 {
5764 struct ppc_link_hash_table *htab;
5765 unsigned int i;
5766 const struct sfpr_def_parms funcs[] =
5767 {
5768 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5769 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5770 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5771 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5772 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5773 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5774 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5775 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5776 { "._savef", 14, 31, savefpr, savefpr1_tail },
5777 { "._restf", 14, 31, restfpr, restfpr1_tail },
5778 { "_savevr_", 20, 31, savevr, savevr_tail },
5779 { "_restvr_", 20, 31, restvr, restvr_tail }
5780 };
5781
5782 htab = ppc_hash_table (info);
5783 if (htab->sfpr == NULL)
5784 /* We don't have any relocs. */
5785 return TRUE;
5786
5787 /* Provide any missing _save* and _rest* functions. */
5788 htab->sfpr->size = 0;
5789 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5790 if (!sfpr_define (info, &funcs[i]))
5791 return FALSE;
5792
5793 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5794
5795 if (htab->sfpr->size == 0)
5796 htab->sfpr->flags |= SEC_EXCLUDE;
5797
5798 return TRUE;
5799 }
5800
5801 /* Adjust a symbol defined by a dynamic object and referenced by a
5802 regular object. The current definition is in some section of the
5803 dynamic object, but we're not including those sections. We have to
5804 change the definition to something the rest of the link can
5805 understand. */
5806
5807 static bfd_boolean
5808 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5809 struct elf_link_hash_entry *h)
5810 {
5811 struct ppc_link_hash_table *htab;
5812 asection *s;
5813
5814 htab = ppc_hash_table (info);
5815
5816 /* Deal with function syms. */
5817 if (h->type == STT_FUNC
5818 || h->needs_plt)
5819 {
5820 /* Clear procedure linkage table information for any symbol that
5821 won't need a .plt entry. */
5822 struct plt_entry *ent;
5823 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5824 if (ent->plt.refcount > 0)
5825 break;
5826 if (ent == NULL
5827 || SYMBOL_CALLS_LOCAL (info, h)
5828 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5829 && h->root.type == bfd_link_hash_undefweak))
5830 {
5831 h->plt.plist = NULL;
5832 h->needs_plt = 0;
5833 }
5834 }
5835 else
5836 h->plt.plist = NULL;
5837
5838 /* If this is a weak symbol, and there is a real definition, the
5839 processor independent code will have arranged for us to see the
5840 real definition first, and we can just use the same value. */
5841 if (h->u.weakdef != NULL)
5842 {
5843 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5844 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5845 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5846 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5847 if (ELIMINATE_COPY_RELOCS)
5848 h->non_got_ref = h->u.weakdef->non_got_ref;
5849 return TRUE;
5850 }
5851
5852 /* If we are creating a shared library, we must presume that the
5853 only references to the symbol are via the global offset table.
5854 For such cases we need not do anything here; the relocations will
5855 be handled correctly by relocate_section. */
5856 if (info->shared)
5857 return TRUE;
5858
5859 /* If there are no references to this symbol that do not use the
5860 GOT, we don't need to generate a copy reloc. */
5861 if (!h->non_got_ref)
5862 return TRUE;
5863
5864 /* Don't generate a copy reloc for symbols defined in the executable. */
5865 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
5866 return TRUE;
5867
5868 if (ELIMINATE_COPY_RELOCS)
5869 {
5870 struct ppc_link_hash_entry * eh;
5871 struct ppc_dyn_relocs *p;
5872
5873 eh = (struct ppc_link_hash_entry *) h;
5874 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5875 {
5876 s = p->sec->output_section;
5877 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5878 break;
5879 }
5880
5881 /* If we didn't find any dynamic relocs in read-only sections, then
5882 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5883 if (p == NULL)
5884 {
5885 h->non_got_ref = 0;
5886 return TRUE;
5887 }
5888 }
5889
5890 if (h->plt.plist != NULL)
5891 {
5892 /* We should never get here, but unfortunately there are versions
5893 of gcc out there that improperly (for this ABI) put initialized
5894 function pointers, vtable refs and suchlike in read-only
5895 sections. Allow them to proceed, but warn that this might
5896 break at runtime. */
5897 (*_bfd_error_handler)
5898 (_("copy reloc against `%s' requires lazy plt linking; "
5899 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5900 h->root.root.string);
5901 }
5902
5903 /* This is a reference to a symbol defined by a dynamic object which
5904 is not a function. */
5905
5906 if (h->size == 0)
5907 {
5908 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5909 h->root.root.string);
5910 return TRUE;
5911 }
5912
5913 /* We must allocate the symbol in our .dynbss section, which will
5914 become part of the .bss section of the executable. There will be
5915 an entry for this symbol in the .dynsym section. The dynamic
5916 object will contain position independent code, so all references
5917 from the dynamic object to this symbol will go through the global
5918 offset table. The dynamic linker will use the .dynsym entry to
5919 determine the address it must put in the global offset table, so
5920 both the dynamic object and the regular object will refer to the
5921 same memory location for the variable. */
5922
5923 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5924 to copy the initial value out of the dynamic object and into the
5925 runtime process image. We need to remember the offset into the
5926 .rela.bss section we are going to use. */
5927 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5928 {
5929 htab->relbss->size += sizeof (Elf64_External_Rela);
5930 h->needs_copy = 1;
5931 }
5932
5933 s = htab->dynbss;
5934
5935 return _bfd_elf_adjust_dynamic_copy (h, s);
5936 }
5937
5938 /* If given a function descriptor symbol, hide both the function code
5939 sym and the descriptor. */
5940 static void
5941 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5942 struct elf_link_hash_entry *h,
5943 bfd_boolean force_local)
5944 {
5945 struct ppc_link_hash_entry *eh;
5946 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5947
5948 eh = (struct ppc_link_hash_entry *) h;
5949 if (eh->is_func_descriptor)
5950 {
5951 struct ppc_link_hash_entry *fh = eh->oh;
5952
5953 if (fh == NULL)
5954 {
5955 const char *p, *q;
5956 struct ppc_link_hash_table *htab;
5957 char save;
5958
5959 /* We aren't supposed to use alloca in BFD because on
5960 systems which do not have alloca the version in libiberty
5961 calls xmalloc, which might cause the program to crash
5962 when it runs out of memory. This function doesn't have a
5963 return status, so there's no way to gracefully return an
5964 error. So cheat. We know that string[-1] can be safely
5965 accessed; It's either a string in an ELF string table,
5966 or allocated in an objalloc structure. */
5967
5968 p = eh->elf.root.root.string - 1;
5969 save = *p;
5970 *(char *) p = '.';
5971 htab = ppc_hash_table (info);
5972 fh = (struct ppc_link_hash_entry *)
5973 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5974 *(char *) p = save;
5975
5976 /* Unfortunately, if it so happens that the string we were
5977 looking for was allocated immediately before this string,
5978 then we overwrote the string terminator. That's the only
5979 reason the lookup should fail. */
5980 if (fh == NULL)
5981 {
5982 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5983 while (q >= eh->elf.root.root.string && *q == *p)
5984 --q, --p;
5985 if (q < eh->elf.root.root.string && *p == '.')
5986 fh = (struct ppc_link_hash_entry *)
5987 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5988 }
5989 if (fh != NULL)
5990 {
5991 eh->oh = fh;
5992 fh->oh = eh;
5993 }
5994 }
5995 if (fh != NULL)
5996 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5997 }
5998 }
5999
6000 static bfd_boolean
6001 get_sym_h (struct elf_link_hash_entry **hp,
6002 Elf_Internal_Sym **symp,
6003 asection **symsecp,
6004 char **tls_maskp,
6005 Elf_Internal_Sym **locsymsp,
6006 unsigned long r_symndx,
6007 bfd *ibfd)
6008 {
6009 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6010
6011 if (r_symndx >= symtab_hdr->sh_info)
6012 {
6013 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6014 struct elf_link_hash_entry *h;
6015
6016 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6017 while (h->root.type == bfd_link_hash_indirect
6018 || h->root.type == bfd_link_hash_warning)
6019 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6020
6021 if (hp != NULL)
6022 *hp = h;
6023
6024 if (symp != NULL)
6025 *symp = NULL;
6026
6027 if (symsecp != NULL)
6028 {
6029 asection *symsec = NULL;
6030 if (h->root.type == bfd_link_hash_defined
6031 || h->root.type == bfd_link_hash_defweak)
6032 symsec = h->root.u.def.section;
6033 *symsecp = symsec;
6034 }
6035
6036 if (tls_maskp != NULL)
6037 {
6038 struct ppc_link_hash_entry *eh;
6039
6040 eh = (struct ppc_link_hash_entry *) h;
6041 *tls_maskp = &eh->tls_mask;
6042 }
6043 }
6044 else
6045 {
6046 Elf_Internal_Sym *sym;
6047 Elf_Internal_Sym *locsyms = *locsymsp;
6048
6049 if (locsyms == NULL)
6050 {
6051 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6052 if (locsyms == NULL)
6053 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6054 symtab_hdr->sh_info,
6055 0, NULL, NULL, NULL);
6056 if (locsyms == NULL)
6057 return FALSE;
6058 *locsymsp = locsyms;
6059 }
6060 sym = locsyms + r_symndx;
6061
6062 if (hp != NULL)
6063 *hp = NULL;
6064
6065 if (symp != NULL)
6066 *symp = sym;
6067
6068 if (symsecp != NULL)
6069 {
6070 asection *symsec = NULL;
6071 if ((sym->st_shndx != SHN_UNDEF
6072 && sym->st_shndx < SHN_LORESERVE)
6073 || sym->st_shndx > SHN_HIRESERVE)
6074 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6075 *symsecp = symsec;
6076 }
6077
6078 if (tls_maskp != NULL)
6079 {
6080 struct got_entry **lgot_ents;
6081 char *tls_mask;
6082
6083 tls_mask = NULL;
6084 lgot_ents = elf_local_got_ents (ibfd);
6085 if (lgot_ents != NULL)
6086 {
6087 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6088 tls_mask = &lgot_masks[r_symndx];
6089 }
6090 *tls_maskp = tls_mask;
6091 }
6092 }
6093 return TRUE;
6094 }
6095
6096 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6097 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6098 type suitable for optimization, and 1 otherwise. */
6099
6100 static int
6101 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6102 Elf_Internal_Sym **locsymsp,
6103 const Elf_Internal_Rela *rel, bfd *ibfd)
6104 {
6105 unsigned long r_symndx;
6106 int next_r;
6107 struct elf_link_hash_entry *h;
6108 Elf_Internal_Sym *sym;
6109 asection *sec;
6110 bfd_vma off;
6111
6112 r_symndx = ELF64_R_SYM (rel->r_info);
6113 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6114 return 0;
6115
6116 if ((*tls_maskp != NULL && **tls_maskp != 0)
6117 || sec == NULL
6118 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6119 return 1;
6120
6121 /* Look inside a TOC section too. */
6122 if (h != NULL)
6123 {
6124 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6125 off = h->root.u.def.value;
6126 }
6127 else
6128 off = sym->st_value;
6129 off += rel->r_addend;
6130 BFD_ASSERT (off % 8 == 0);
6131 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6132 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6133 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6134 return 0;
6135 if (toc_symndx != NULL)
6136 *toc_symndx = r_symndx;
6137 if ((h == NULL
6138 || ((h->root.type == bfd_link_hash_defined
6139 || h->root.type == bfd_link_hash_defweak)
6140 && !h->def_dynamic))
6141 && (next_r == -1 || next_r == -2))
6142 return 1 - next_r;
6143 return 1;
6144 }
6145
6146 /* Adjust all global syms defined in opd sections. In gcc generated
6147 code for the old ABI, these will already have been done. */
6148
6149 static bfd_boolean
6150 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6151 {
6152 struct ppc_link_hash_entry *eh;
6153 asection *sym_sec;
6154 long *opd_adjust;
6155
6156 if (h->root.type == bfd_link_hash_indirect)
6157 return TRUE;
6158
6159 if (h->root.type == bfd_link_hash_warning)
6160 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6161
6162 if (h->root.type != bfd_link_hash_defined
6163 && h->root.type != bfd_link_hash_defweak)
6164 return TRUE;
6165
6166 eh = (struct ppc_link_hash_entry *) h;
6167 if (eh->adjust_done)
6168 return TRUE;
6169
6170 sym_sec = eh->elf.root.u.def.section;
6171 opd_adjust = get_opd_info (sym_sec);
6172 if (opd_adjust != NULL)
6173 {
6174 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6175 if (adjust == -1)
6176 {
6177 /* This entry has been deleted. */
6178 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6179 if (dsec == NULL)
6180 {
6181 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6182 if (elf_discarded_section (dsec))
6183 {
6184 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6185 break;
6186 }
6187 }
6188 eh->elf.root.u.def.value = 0;
6189 eh->elf.root.u.def.section = dsec;
6190 }
6191 else
6192 eh->elf.root.u.def.value += adjust;
6193 eh->adjust_done = 1;
6194 }
6195 return TRUE;
6196 }
6197
6198 /* Handles decrementing dynamic reloc counts for the reloc specified by
6199 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6200 have already been determined. */
6201
6202 static bfd_boolean
6203 dec_dynrel_count (bfd_vma r_info,
6204 asection *sec,
6205 struct bfd_link_info *info,
6206 Elf_Internal_Sym **local_syms,
6207 struct elf_link_hash_entry *h,
6208 asection *sym_sec)
6209 {
6210 enum elf_ppc64_reloc_type r_type;
6211 struct ppc_dyn_relocs *p;
6212 struct ppc_dyn_relocs **pp;
6213
6214 /* Can this reloc be dynamic? This switch, and later tests here
6215 should be kept in sync with the code in check_relocs. */
6216 r_type = ELF64_R_TYPE (r_info);
6217 switch (r_type)
6218 {
6219 default:
6220 return TRUE;
6221
6222 case R_PPC64_TPREL16:
6223 case R_PPC64_TPREL16_LO:
6224 case R_PPC64_TPREL16_HI:
6225 case R_PPC64_TPREL16_HA:
6226 case R_PPC64_TPREL16_DS:
6227 case R_PPC64_TPREL16_LO_DS:
6228 case R_PPC64_TPREL16_HIGHER:
6229 case R_PPC64_TPREL16_HIGHERA:
6230 case R_PPC64_TPREL16_HIGHEST:
6231 case R_PPC64_TPREL16_HIGHESTA:
6232 if (!info->shared)
6233 return TRUE;
6234
6235 case R_PPC64_TPREL64:
6236 case R_PPC64_DTPMOD64:
6237 case R_PPC64_DTPREL64:
6238 case R_PPC64_ADDR64:
6239 case R_PPC64_REL30:
6240 case R_PPC64_REL32:
6241 case R_PPC64_REL64:
6242 case R_PPC64_ADDR14:
6243 case R_PPC64_ADDR14_BRNTAKEN:
6244 case R_PPC64_ADDR14_BRTAKEN:
6245 case R_PPC64_ADDR16:
6246 case R_PPC64_ADDR16_DS:
6247 case R_PPC64_ADDR16_HA:
6248 case R_PPC64_ADDR16_HI:
6249 case R_PPC64_ADDR16_HIGHER:
6250 case R_PPC64_ADDR16_HIGHERA:
6251 case R_PPC64_ADDR16_HIGHEST:
6252 case R_PPC64_ADDR16_HIGHESTA:
6253 case R_PPC64_ADDR16_LO:
6254 case R_PPC64_ADDR16_LO_DS:
6255 case R_PPC64_ADDR24:
6256 case R_PPC64_ADDR32:
6257 case R_PPC64_UADDR16:
6258 case R_PPC64_UADDR32:
6259 case R_PPC64_UADDR64:
6260 case R_PPC64_TOC:
6261 break;
6262 }
6263
6264 if (local_syms != NULL)
6265 {
6266 unsigned long r_symndx;
6267 Elf_Internal_Sym *sym;
6268 bfd *ibfd = sec->owner;
6269
6270 r_symndx = ELF64_R_SYM (r_info);
6271 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6272 return FALSE;
6273 }
6274
6275 if ((info->shared
6276 && (MUST_BE_DYN_RELOC (r_type)
6277 || (h != NULL
6278 && (!info->symbolic
6279 || h->root.type == bfd_link_hash_defweak
6280 || !h->def_regular))))
6281 || (ELIMINATE_COPY_RELOCS
6282 && !info->shared
6283 && h != NULL
6284 && (h->root.type == bfd_link_hash_defweak
6285 || !h->def_regular)))
6286 ;
6287 else
6288 return TRUE;
6289
6290 if (h != NULL)
6291 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6292 else
6293 {
6294 if (sym_sec != NULL)
6295 {
6296 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6297 pp = (struct ppc_dyn_relocs **) vpp;
6298 }
6299 else
6300 {
6301 void *vpp = &elf_section_data (sec)->local_dynrel;
6302 pp = (struct ppc_dyn_relocs **) vpp;
6303 }
6304
6305 /* elf_gc_sweep may have already removed all dyn relocs associated
6306 with local syms for a given section. Don't report a dynreloc
6307 miscount. */
6308 if (*pp == NULL)
6309 return TRUE;
6310 }
6311
6312 while ((p = *pp) != NULL)
6313 {
6314 if (p->sec == sec)
6315 {
6316 if (!MUST_BE_DYN_RELOC (r_type))
6317 p->pc_count -= 1;
6318 p->count -= 1;
6319 if (p->count == 0)
6320 *pp = p->next;
6321 return TRUE;
6322 }
6323 pp = &p->next;
6324 }
6325
6326 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6327 sec->owner, sec);
6328 bfd_set_error (bfd_error_bad_value);
6329 return FALSE;
6330 }
6331
6332 /* Remove unused Official Procedure Descriptor entries. Currently we
6333 only remove those associated with functions in discarded link-once
6334 sections, or weakly defined functions that have been overridden. It
6335 would be possible to remove many more entries for statically linked
6336 applications. */
6337
6338 bfd_boolean
6339 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6340 bfd_boolean no_opd_opt,
6341 bfd_boolean non_overlapping)
6342 {
6343 bfd *ibfd;
6344 bfd_boolean some_edited = FALSE;
6345 asection *need_pad = NULL;
6346
6347 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6348 {
6349 asection *sec;
6350 Elf_Internal_Rela *relstart, *rel, *relend;
6351 Elf_Internal_Shdr *symtab_hdr;
6352 Elf_Internal_Sym *local_syms;
6353 struct elf_link_hash_entry **sym_hashes;
6354 bfd_vma offset;
6355 bfd_size_type amt;
6356 long *opd_adjust;
6357 bfd_boolean need_edit, add_aux_fields;
6358 bfd_size_type cnt_16b = 0;
6359
6360 sec = bfd_get_section_by_name (ibfd, ".opd");
6361 if (sec == NULL || sec->size == 0)
6362 continue;
6363
6364 amt = sec->size * sizeof (long) / 8;
6365 opd_adjust = get_opd_info (sec);
6366 if (opd_adjust == NULL)
6367 {
6368 /* check_relocs hasn't been called. Must be a ld -r link
6369 or --just-symbols object. */
6370 opd_adjust = bfd_alloc (obfd, amt);
6371 if (opd_adjust == NULL)
6372 return FALSE;
6373 ppc64_elf_section_data (sec)->u.opd_adjust = opd_adjust;
6374 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
6375 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6376 }
6377 memset (opd_adjust, 0, amt);
6378
6379 if (no_opd_opt)
6380 continue;
6381
6382 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6383 continue;
6384
6385 if (sec->output_section == bfd_abs_section_ptr)
6386 continue;
6387
6388 /* Look through the section relocs. */
6389 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6390 continue;
6391
6392 local_syms = NULL;
6393 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6394 sym_hashes = elf_sym_hashes (ibfd);
6395
6396 /* Read the relocations. */
6397 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6398 info->keep_memory);
6399 if (relstart == NULL)
6400 return FALSE;
6401
6402 /* First run through the relocs to check they are sane, and to
6403 determine whether we need to edit this opd section. */
6404 need_edit = FALSE;
6405 need_pad = sec;
6406 offset = 0;
6407 relend = relstart + sec->reloc_count;
6408 for (rel = relstart; rel < relend; )
6409 {
6410 enum elf_ppc64_reloc_type r_type;
6411 unsigned long r_symndx;
6412 asection *sym_sec;
6413 struct elf_link_hash_entry *h;
6414 Elf_Internal_Sym *sym;
6415
6416 /* .opd contains a regular array of 16 or 24 byte entries. We're
6417 only interested in the reloc pointing to a function entry
6418 point. */
6419 if (rel->r_offset != offset
6420 || rel + 1 >= relend
6421 || (rel + 1)->r_offset != offset + 8)
6422 {
6423 /* If someone messes with .opd alignment then after a
6424 "ld -r" we might have padding in the middle of .opd.
6425 Also, there's nothing to prevent someone putting
6426 something silly in .opd with the assembler. No .opd
6427 optimization for them! */
6428 broken_opd:
6429 (*_bfd_error_handler)
6430 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6431 need_edit = FALSE;
6432 break;
6433 }
6434
6435 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6436 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6437 {
6438 (*_bfd_error_handler)
6439 (_("%B: unexpected reloc type %u in .opd section"),
6440 ibfd, r_type);
6441 need_edit = FALSE;
6442 break;
6443 }
6444
6445 r_symndx = ELF64_R_SYM (rel->r_info);
6446 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6447 r_symndx, ibfd))
6448 goto error_ret;
6449
6450 if (sym_sec == NULL || sym_sec->owner == NULL)
6451 {
6452 const char *sym_name;
6453 if (h != NULL)
6454 sym_name = h->root.root.string;
6455 else
6456 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6457 sym_sec);
6458
6459 (*_bfd_error_handler)
6460 (_("%B: undefined sym `%s' in .opd section"),
6461 ibfd, sym_name);
6462 need_edit = FALSE;
6463 break;
6464 }
6465
6466 /* opd entries are always for functions defined in the
6467 current input bfd. If the symbol isn't defined in the
6468 input bfd, then we won't be using the function in this
6469 bfd; It must be defined in a linkonce section in another
6470 bfd, or is weak. It's also possible that we are
6471 discarding the function due to a linker script /DISCARD/,
6472 which we test for via the output_section. */
6473 if (sym_sec->owner != ibfd
6474 || sym_sec->output_section == bfd_abs_section_ptr)
6475 need_edit = TRUE;
6476
6477 rel += 2;
6478 if (rel == relend
6479 || (rel + 1 == relend && rel->r_offset == offset + 16))
6480 {
6481 if (sec->size == offset + 24)
6482 {
6483 need_pad = NULL;
6484 break;
6485 }
6486 if (rel == relend && sec->size == offset + 16)
6487 {
6488 cnt_16b++;
6489 break;
6490 }
6491 goto broken_opd;
6492 }
6493
6494 if (rel->r_offset == offset + 24)
6495 offset += 24;
6496 else if (rel->r_offset != offset + 16)
6497 goto broken_opd;
6498 else if (rel + 1 < relend
6499 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6500 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6501 {
6502 offset += 16;
6503 cnt_16b++;
6504 }
6505 else if (rel + 2 < relend
6506 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6507 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6508 {
6509 offset += 24;
6510 rel += 1;
6511 }
6512 else
6513 goto broken_opd;
6514 }
6515
6516 add_aux_fields = non_overlapping && cnt_16b > 0;
6517
6518 if (need_edit || add_aux_fields)
6519 {
6520 Elf_Internal_Rela *write_rel;
6521 bfd_byte *rptr, *wptr;
6522 bfd_byte *new_contents = NULL;
6523 bfd_boolean skip;
6524 long opd_ent_size;
6525
6526 /* This seems a waste of time as input .opd sections are all
6527 zeros as generated by gcc, but I suppose there's no reason
6528 this will always be so. We might start putting something in
6529 the third word of .opd entries. */
6530 if ((sec->flags & SEC_IN_MEMORY) == 0)
6531 {
6532 bfd_byte *loc;
6533 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6534 {
6535 if (loc != NULL)
6536 free (loc);
6537 error_ret:
6538 if (local_syms != NULL
6539 && symtab_hdr->contents != (unsigned char *) local_syms)
6540 free (local_syms);
6541 if (elf_section_data (sec)->relocs != relstart)
6542 free (relstart);
6543 return FALSE;
6544 }
6545 sec->contents = loc;
6546 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6547 }
6548
6549 elf_section_data (sec)->relocs = relstart;
6550
6551 new_contents = sec->contents;
6552 if (add_aux_fields)
6553 {
6554 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6555 if (new_contents == NULL)
6556 return FALSE;
6557 need_pad = FALSE;
6558 }
6559 wptr = new_contents;
6560 rptr = sec->contents;
6561
6562 write_rel = relstart;
6563 skip = FALSE;
6564 offset = 0;
6565 opd_ent_size = 0;
6566 for (rel = relstart; rel < relend; rel++)
6567 {
6568 unsigned long r_symndx;
6569 asection *sym_sec;
6570 struct elf_link_hash_entry *h;
6571 Elf_Internal_Sym *sym;
6572
6573 r_symndx = ELF64_R_SYM (rel->r_info);
6574 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6575 r_symndx, ibfd))
6576 goto error_ret;
6577
6578 if (rel->r_offset == offset)
6579 {
6580 struct ppc_link_hash_entry *fdh = NULL;
6581
6582 /* See if the .opd entry is full 24 byte or
6583 16 byte (with fd_aux entry overlapped with next
6584 fd_func). */
6585 opd_ent_size = 24;
6586 if ((rel + 2 == relend && sec->size == offset + 16)
6587 || (rel + 3 < relend
6588 && rel[2].r_offset == offset + 16
6589 && rel[3].r_offset == offset + 24
6590 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6591 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6592 opd_ent_size = 16;
6593
6594 if (h != NULL
6595 && h->root.root.string[0] == '.')
6596 {
6597 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6598 ppc_hash_table (info));
6599 if (fdh != NULL
6600 && fdh->elf.root.type != bfd_link_hash_defined
6601 && fdh->elf.root.type != bfd_link_hash_defweak)
6602 fdh = NULL;
6603 }
6604
6605 skip = (sym_sec->owner != ibfd
6606 || sym_sec->output_section == bfd_abs_section_ptr);
6607 if (skip)
6608 {
6609 if (fdh != NULL && sym_sec->owner == ibfd)
6610 {
6611 /* Arrange for the function descriptor sym
6612 to be dropped. */
6613 fdh->elf.root.u.def.value = 0;
6614 fdh->elf.root.u.def.section = sym_sec;
6615 }
6616 opd_adjust[rel->r_offset / 8] = -1;
6617 }
6618 else
6619 {
6620 /* We'll be keeping this opd entry. */
6621
6622 if (fdh != NULL)
6623 {
6624 /* Redefine the function descriptor symbol to
6625 this location in the opd section. It is
6626 necessary to update the value here rather
6627 than using an array of adjustments as we do
6628 for local symbols, because various places
6629 in the generic ELF code use the value
6630 stored in u.def.value. */
6631 fdh->elf.root.u.def.value = wptr - new_contents;
6632 fdh->adjust_done = 1;
6633 }
6634
6635 /* Local syms are a bit tricky. We could
6636 tweak them as they can be cached, but
6637 we'd need to look through the local syms
6638 for the function descriptor sym which we
6639 don't have at the moment. So keep an
6640 array of adjustments. */
6641 opd_adjust[rel->r_offset / 8]
6642 = (wptr - new_contents) - (rptr - sec->contents);
6643
6644 if (wptr != rptr)
6645 memcpy (wptr, rptr, opd_ent_size);
6646 wptr += opd_ent_size;
6647 if (add_aux_fields && opd_ent_size == 16)
6648 {
6649 memset (wptr, '\0', 8);
6650 wptr += 8;
6651 }
6652 }
6653 rptr += opd_ent_size;
6654 offset += opd_ent_size;
6655 }
6656
6657 if (skip)
6658 {
6659 if (!NO_OPD_RELOCS
6660 && !info->relocatable
6661 && !dec_dynrel_count (rel->r_info, sec, info,
6662 NULL, h, sym_sec))
6663 goto error_ret;
6664 }
6665 else
6666 {
6667 /* We need to adjust any reloc offsets to point to the
6668 new opd entries. While we're at it, we may as well
6669 remove redundant relocs. */
6670 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6671 if (write_rel != rel)
6672 memcpy (write_rel, rel, sizeof (*rel));
6673 ++write_rel;
6674 }
6675 }
6676
6677 sec->size = wptr - new_contents;
6678 sec->reloc_count = write_rel - relstart;
6679 if (add_aux_fields)
6680 {
6681 free (sec->contents);
6682 sec->contents = new_contents;
6683 }
6684
6685 /* Fudge the header size too, as this is used later in
6686 elf_bfd_final_link if we are emitting relocs. */
6687 elf_section_data (sec)->rel_hdr.sh_size
6688 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6689 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6690 some_edited = TRUE;
6691 }
6692 else if (elf_section_data (sec)->relocs != relstart)
6693 free (relstart);
6694
6695 if (local_syms != NULL
6696 && symtab_hdr->contents != (unsigned char *) local_syms)
6697 {
6698 if (!info->keep_memory)
6699 free (local_syms);
6700 else
6701 symtab_hdr->contents = (unsigned char *) local_syms;
6702 }
6703 }
6704
6705 if (some_edited)
6706 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6707
6708 /* If we are doing a final link and the last .opd entry is just 16 byte
6709 long, add a 8 byte padding after it. */
6710 if (need_pad != NULL && !info->relocatable)
6711 {
6712 bfd_byte *p;
6713
6714 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6715 {
6716 BFD_ASSERT (need_pad->size > 0);
6717
6718 p = bfd_malloc (need_pad->size + 8);
6719 if (p == NULL)
6720 return FALSE;
6721
6722 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6723 p, 0, need_pad->size))
6724 return FALSE;
6725
6726 need_pad->contents = p;
6727 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6728 }
6729 else
6730 {
6731 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6732 if (p == NULL)
6733 return FALSE;
6734
6735 need_pad->contents = p;
6736 }
6737
6738 memset (need_pad->contents + need_pad->size, 0, 8);
6739 need_pad->size += 8;
6740 }
6741
6742 return TRUE;
6743 }
6744
6745 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6746
6747 asection *
6748 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6749 {
6750 struct ppc_link_hash_table *htab;
6751
6752 htab = ppc_hash_table (info);
6753 if (htab->tls_get_addr != NULL)
6754 {
6755 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6756
6757 while (h->elf.root.type == bfd_link_hash_indirect
6758 || h->elf.root.type == bfd_link_hash_warning)
6759 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6760
6761 htab->tls_get_addr = h;
6762
6763 if (htab->tls_get_addr_fd == NULL
6764 && h->oh != NULL
6765 && h->oh->is_func_descriptor
6766 && (h->oh->elf.root.type == bfd_link_hash_defined
6767 || h->oh->elf.root.type == bfd_link_hash_defweak))
6768 htab->tls_get_addr_fd = h->oh;
6769 }
6770
6771 if (htab->tls_get_addr_fd != NULL)
6772 {
6773 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6774
6775 while (h->elf.root.type == bfd_link_hash_indirect
6776 || h->elf.root.type == bfd_link_hash_warning)
6777 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6778
6779 htab->tls_get_addr_fd = h;
6780 }
6781
6782 return _bfd_elf_tls_setup (obfd, info);
6783 }
6784
6785 /* Run through all the TLS relocs looking for optimization
6786 opportunities. The linker has been hacked (see ppc64elf.em) to do
6787 a preliminary section layout so that we know the TLS segment
6788 offsets. We can't optimize earlier because some optimizations need
6789 to know the tp offset, and we need to optimize before allocating
6790 dynamic relocations. */
6791
6792 bfd_boolean
6793 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6794 {
6795 bfd *ibfd;
6796 asection *sec;
6797 struct ppc_link_hash_table *htab;
6798
6799 if (info->relocatable || info->shared)
6800 return TRUE;
6801
6802 htab = ppc_hash_table (info);
6803 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6804 {
6805 Elf_Internal_Sym *locsyms = NULL;
6806 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6807 unsigned char *toc_ref = NULL;
6808
6809 /* Look at all the sections for this file, with TOC last. */
6810 for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next
6811 : ibfd->sections);
6812 sec != NULL;
6813 sec = (sec == toc ? NULL
6814 : sec->next == NULL ? toc
6815 : sec->next == toc && toc->next ? toc->next
6816 : sec->next))
6817 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6818 {
6819 Elf_Internal_Rela *relstart, *rel, *relend;
6820 int expecting_tls_get_addr;
6821 long toc_ref_index = 0;
6822
6823 /* Read the relocations. */
6824 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6825 info->keep_memory);
6826 if (relstart == NULL)
6827 return FALSE;
6828
6829 expecting_tls_get_addr = 0;
6830 relend = relstart + sec->reloc_count;
6831 for (rel = relstart; rel < relend; rel++)
6832 {
6833 enum elf_ppc64_reloc_type r_type;
6834 unsigned long r_symndx;
6835 struct elf_link_hash_entry *h;
6836 Elf_Internal_Sym *sym;
6837 asection *sym_sec;
6838 char *tls_mask;
6839 char tls_set, tls_clear, tls_type = 0;
6840 bfd_vma value;
6841 bfd_boolean ok_tprel, is_local;
6842
6843 r_symndx = ELF64_R_SYM (rel->r_info);
6844 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6845 r_symndx, ibfd))
6846 {
6847 err_free_rel:
6848 if (elf_section_data (sec)->relocs != relstart)
6849 free (relstart);
6850 if (toc_ref != NULL)
6851 free (toc_ref);
6852 if (locsyms != NULL
6853 && (elf_tdata (ibfd)->symtab_hdr.contents
6854 != (unsigned char *) locsyms))
6855 free (locsyms);
6856 return FALSE;
6857 }
6858
6859 if (h != NULL)
6860 {
6861 if (h->root.type != bfd_link_hash_defined
6862 && h->root.type != bfd_link_hash_defweak)
6863 continue;
6864 value = h->root.u.def.value;
6865 }
6866 else
6867 /* Symbols referenced by TLS relocs must be of type
6868 STT_TLS. So no need for .opd local sym adjust. */
6869 value = sym->st_value;
6870
6871 ok_tprel = FALSE;
6872 is_local = FALSE;
6873 if (h == NULL
6874 || !h->def_dynamic)
6875 {
6876 is_local = TRUE;
6877 value += sym_sec->output_offset;
6878 value += sym_sec->output_section->vma;
6879 value -= htab->elf.tls_sec->vma;
6880 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6881 < (bfd_vma) 1 << 32);
6882 }
6883
6884 r_type = ELF64_R_TYPE (rel->r_info);
6885 switch (r_type)
6886 {
6887 case R_PPC64_GOT_TLSLD16:
6888 case R_PPC64_GOT_TLSLD16_LO:
6889 case R_PPC64_GOT_TLSLD16_HI:
6890 case R_PPC64_GOT_TLSLD16_HA:
6891 /* These relocs should never be against a symbol
6892 defined in a shared lib. Leave them alone if
6893 that turns out to be the case. */
6894 ppc64_tlsld_got (ibfd)->refcount -= 1;
6895 if (!is_local)
6896 continue;
6897
6898 /* LD -> LE */
6899 tls_set = 0;
6900 tls_clear = TLS_LD;
6901 tls_type = TLS_TLS | TLS_LD;
6902 expecting_tls_get_addr = 1;
6903 break;
6904
6905 case R_PPC64_GOT_TLSGD16:
6906 case R_PPC64_GOT_TLSGD16_LO:
6907 case R_PPC64_GOT_TLSGD16_HI:
6908 case R_PPC64_GOT_TLSGD16_HA:
6909 if (ok_tprel)
6910 /* GD -> LE */
6911 tls_set = 0;
6912 else
6913 /* GD -> IE */
6914 tls_set = TLS_TLS | TLS_TPRELGD;
6915 tls_clear = TLS_GD;
6916 tls_type = TLS_TLS | TLS_GD;
6917 expecting_tls_get_addr = 1;
6918 break;
6919
6920 case R_PPC64_GOT_TPREL16_DS:
6921 case R_PPC64_GOT_TPREL16_LO_DS:
6922 case R_PPC64_GOT_TPREL16_HI:
6923 case R_PPC64_GOT_TPREL16_HA:
6924 expecting_tls_get_addr = 0;
6925 if (ok_tprel)
6926 {
6927 /* IE -> LE */
6928 tls_set = 0;
6929 tls_clear = TLS_TPREL;
6930 tls_type = TLS_TLS | TLS_TPREL;
6931 break;
6932 }
6933 else
6934 continue;
6935
6936 case R_PPC64_REL14:
6937 case R_PPC64_REL14_BRTAKEN:
6938 case R_PPC64_REL14_BRNTAKEN:
6939 case R_PPC64_REL24:
6940 if (h != NULL
6941 && (h == &htab->tls_get_addr->elf
6942 || h == &htab->tls_get_addr_fd->elf))
6943 {
6944 if (!expecting_tls_get_addr
6945 && rel != relstart
6946 && ((ELF64_R_TYPE (rel[-1].r_info)
6947 == R_PPC64_TOC16)
6948 || (ELF64_R_TYPE (rel[-1].r_info)
6949 == R_PPC64_TOC16_LO)))
6950 {
6951 /* Check for toc tls entries. */
6952 char *toc_tls;
6953 int retval;
6954
6955 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6956 rel - 1, ibfd);
6957 if (retval == 0)
6958 goto err_free_rel;
6959 if (retval > 1 && toc_tls != NULL)
6960 {
6961 expecting_tls_get_addr = 1;
6962 if (toc_ref != NULL)
6963 toc_ref[toc_ref_index] = 1;
6964 }
6965 }
6966
6967 if (expecting_tls_get_addr)
6968 {
6969 struct plt_entry *ent;
6970 for (ent = h->plt.plist; ent; ent = ent->next)
6971 if (ent->addend == 0)
6972 {
6973 if (ent->plt.refcount > 0)
6974 ent->plt.refcount -= 1;
6975 break;
6976 }
6977 }
6978 }
6979 expecting_tls_get_addr = 0;
6980 continue;
6981
6982 case R_PPC64_TOC16:
6983 case R_PPC64_TOC16_LO:
6984 case R_PPC64_TLS:
6985 expecting_tls_get_addr = 0;
6986 if (sym_sec == toc && toc != NULL)
6987 {
6988 /* Mark this toc entry as referenced by a TLS
6989 code sequence. We can do that now in the
6990 case of R_PPC64_TLS, and after checking for
6991 tls_get_addr for the TOC16 relocs. */
6992 if (toc_ref == NULL)
6993 {
6994 toc_ref = bfd_zmalloc (toc->size / 8);
6995 if (toc_ref == NULL)
6996 goto err_free_rel;
6997 }
6998 if (h != NULL)
6999 value = h->root.u.def.value;
7000 else
7001 value = sym->st_value;
7002 value += rel->r_addend;
7003 BFD_ASSERT (value < toc->size && value % 8 == 0);
7004 toc_ref_index = value / 8;
7005 if (r_type == R_PPC64_TLS)
7006 toc_ref[toc_ref_index] = 1;
7007 }
7008 continue;
7009
7010 case R_PPC64_TPREL64:
7011 expecting_tls_get_addr = 0;
7012 if (sec != toc
7013 || toc_ref == NULL
7014 || !toc_ref[rel->r_offset / 8])
7015 continue;
7016 if (ok_tprel)
7017 {
7018 /* IE -> LE */
7019 tls_set = TLS_EXPLICIT;
7020 tls_clear = TLS_TPREL;
7021 break;
7022 }
7023 else
7024 continue;
7025
7026 case R_PPC64_DTPMOD64:
7027 expecting_tls_get_addr = 0;
7028 if (sec != toc
7029 || toc_ref == NULL
7030 || !toc_ref[rel->r_offset / 8])
7031 continue;
7032 if (rel + 1 < relend
7033 && (rel[1].r_info
7034 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7035 && rel[1].r_offset == rel->r_offset + 8)
7036 {
7037 if (ok_tprel)
7038 /* GD -> LE */
7039 tls_set = TLS_EXPLICIT | TLS_GD;
7040 else
7041 /* GD -> IE */
7042 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7043 tls_clear = TLS_GD;
7044 }
7045 else
7046 {
7047 if (!is_local)
7048 continue;
7049
7050 /* LD -> LE */
7051 tls_set = TLS_EXPLICIT;
7052 tls_clear = TLS_LD;
7053 }
7054 break;
7055
7056 default:
7057 expecting_tls_get_addr = 0;
7058 continue;
7059 }
7060
7061 if ((tls_set & TLS_EXPLICIT) == 0)
7062 {
7063 struct got_entry *ent;
7064
7065 /* Adjust got entry for this reloc. */
7066 if (h != NULL)
7067 ent = h->got.glist;
7068 else
7069 ent = elf_local_got_ents (ibfd)[r_symndx];
7070
7071 for (; ent != NULL; ent = ent->next)
7072 if (ent->addend == rel->r_addend
7073 && ent->owner == ibfd
7074 && ent->tls_type == tls_type)
7075 break;
7076 if (ent == NULL)
7077 abort ();
7078
7079 if (tls_set == 0)
7080 {
7081 /* We managed to get rid of a got entry. */
7082 if (ent->got.refcount > 0)
7083 ent->got.refcount -= 1;
7084 }
7085 }
7086 else
7087 {
7088 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7089 we'll lose one or two dyn relocs. */
7090 if (!dec_dynrel_count (rel->r_info, sec, info,
7091 NULL, h, sym_sec))
7092 return FALSE;
7093
7094 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7095 {
7096 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7097 NULL, h, sym_sec))
7098 return FALSE;
7099 }
7100 }
7101
7102 *tls_mask |= tls_set;
7103 *tls_mask &= ~tls_clear;
7104 }
7105
7106 if (elf_section_data (sec)->relocs != relstart)
7107 free (relstart);
7108 }
7109
7110 if (toc_ref != NULL)
7111 free (toc_ref);
7112
7113 if (locsyms != NULL
7114 && (elf_tdata (ibfd)->symtab_hdr.contents
7115 != (unsigned char *) locsyms))
7116 {
7117 if (!info->keep_memory)
7118 free (locsyms);
7119 else
7120 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7121 }
7122 }
7123 return TRUE;
7124 }
7125
7126 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7127 the values of any global symbols in a toc section that has been
7128 edited. Globals in toc sections should be a rarity, so this function
7129 sets a flag if any are found in toc sections other than the one just
7130 edited, so that futher hash table traversals can be avoided. */
7131
7132 struct adjust_toc_info
7133 {
7134 asection *toc;
7135 unsigned long *skip;
7136 bfd_boolean global_toc_syms;
7137 };
7138
7139 static bfd_boolean
7140 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7141 {
7142 struct ppc_link_hash_entry *eh;
7143 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7144
7145 if (h->root.type == bfd_link_hash_indirect)
7146 return TRUE;
7147
7148 if (h->root.type == bfd_link_hash_warning)
7149 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7150
7151 if (h->root.type != bfd_link_hash_defined
7152 && h->root.type != bfd_link_hash_defweak)
7153 return TRUE;
7154
7155 eh = (struct ppc_link_hash_entry *) h;
7156 if (eh->adjust_done)
7157 return TRUE;
7158
7159 if (eh->elf.root.u.def.section == toc_inf->toc)
7160 {
7161 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7162 if (skip != (unsigned long) -1)
7163 eh->elf.root.u.def.value -= skip;
7164 else
7165 {
7166 (*_bfd_error_handler)
7167 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7168 eh->elf.root.u.def.section = &bfd_abs_section;
7169 eh->elf.root.u.def.value = 0;
7170 }
7171 eh->adjust_done = 1;
7172 }
7173 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7174 toc_inf->global_toc_syms = TRUE;
7175
7176 return TRUE;
7177 }
7178
7179 /* Examine all relocs referencing .toc sections in order to remove
7180 unused .toc entries. */
7181
7182 bfd_boolean
7183 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7184 {
7185 bfd *ibfd;
7186 struct adjust_toc_info toc_inf;
7187
7188 toc_inf.global_toc_syms = TRUE;
7189 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7190 {
7191 asection *toc, *sec;
7192 Elf_Internal_Shdr *symtab_hdr;
7193 Elf_Internal_Sym *local_syms;
7194 struct elf_link_hash_entry **sym_hashes;
7195 Elf_Internal_Rela *relstart, *rel;
7196 unsigned long *skip, *drop;
7197 unsigned char *used;
7198 unsigned char *keep, last, some_unused;
7199
7200 toc = bfd_get_section_by_name (ibfd, ".toc");
7201 if (toc == NULL
7202 || toc->size == 0
7203 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7204 || elf_discarded_section (toc))
7205 continue;
7206
7207 local_syms = NULL;
7208 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7209 sym_hashes = elf_sym_hashes (ibfd);
7210
7211 /* Look at sections dropped from the final link. */
7212 skip = NULL;
7213 relstart = NULL;
7214 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7215 {
7216 if (sec->reloc_count == 0
7217 || !elf_discarded_section (sec)
7218 || get_opd_info (sec)
7219 || (sec->flags & SEC_ALLOC) == 0
7220 || (sec->flags & SEC_DEBUGGING) != 0)
7221 continue;
7222
7223 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7224 if (relstart == NULL)
7225 goto error_ret;
7226
7227 /* Run through the relocs to see which toc entries might be
7228 unused. */
7229 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7230 {
7231 enum elf_ppc64_reloc_type r_type;
7232 unsigned long r_symndx;
7233 asection *sym_sec;
7234 struct elf_link_hash_entry *h;
7235 Elf_Internal_Sym *sym;
7236 bfd_vma val;
7237
7238 r_type = ELF64_R_TYPE (rel->r_info);
7239 switch (r_type)
7240 {
7241 default:
7242 continue;
7243
7244 case R_PPC64_TOC16:
7245 case R_PPC64_TOC16_LO:
7246 case R_PPC64_TOC16_HI:
7247 case R_PPC64_TOC16_HA:
7248 case R_PPC64_TOC16_DS:
7249 case R_PPC64_TOC16_LO_DS:
7250 break;
7251 }
7252
7253 r_symndx = ELF64_R_SYM (rel->r_info);
7254 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7255 r_symndx, ibfd))
7256 goto error_ret;
7257
7258 if (sym_sec != toc)
7259 continue;
7260
7261 if (h != NULL)
7262 val = h->root.u.def.value;
7263 else
7264 val = sym->st_value;
7265 val += rel->r_addend;
7266
7267 if (val >= toc->size)
7268 continue;
7269
7270 /* Anything in the toc ought to be aligned to 8 bytes.
7271 If not, don't mark as unused. */
7272 if (val & 7)
7273 continue;
7274
7275 if (skip == NULL)
7276 {
7277 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7278 if (skip == NULL)
7279 goto error_ret;
7280 }
7281
7282 skip[val >> 3] = 1;
7283 }
7284
7285 if (elf_section_data (sec)->relocs != relstart)
7286 free (relstart);
7287 }
7288
7289 if (skip == NULL)
7290 continue;
7291
7292 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7293 if (used == NULL)
7294 {
7295 error_ret:
7296 if (local_syms != NULL
7297 && symtab_hdr->contents != (unsigned char *) local_syms)
7298 free (local_syms);
7299 if (sec != NULL
7300 && relstart != NULL
7301 && elf_section_data (sec)->relocs != relstart)
7302 free (relstart);
7303 if (skip != NULL)
7304 free (skip);
7305 return FALSE;
7306 }
7307
7308 /* Now check all kept sections that might reference the toc.
7309 Check the toc itself last. */
7310 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7311 : ibfd->sections);
7312 sec != NULL;
7313 sec = (sec == toc ? NULL
7314 : sec->next == NULL ? toc
7315 : sec->next == toc && toc->next ? toc->next
7316 : sec->next))
7317 {
7318 int repeat;
7319
7320 if (sec->reloc_count == 0
7321 || elf_discarded_section (sec)
7322 || get_opd_info (sec)
7323 || (sec->flags & SEC_ALLOC) == 0
7324 || (sec->flags & SEC_DEBUGGING) != 0)
7325 continue;
7326
7327 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7328 if (relstart == NULL)
7329 goto error_ret;
7330
7331 /* Mark toc entries referenced as used. */
7332 repeat = 0;
7333 do
7334 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7335 {
7336 enum elf_ppc64_reloc_type r_type;
7337 unsigned long r_symndx;
7338 asection *sym_sec;
7339 struct elf_link_hash_entry *h;
7340 Elf_Internal_Sym *sym;
7341 bfd_vma val;
7342
7343 r_type = ELF64_R_TYPE (rel->r_info);
7344 switch (r_type)
7345 {
7346 case R_PPC64_TOC16:
7347 case R_PPC64_TOC16_LO:
7348 case R_PPC64_TOC16_HI:
7349 case R_PPC64_TOC16_HA:
7350 case R_PPC64_TOC16_DS:
7351 case R_PPC64_TOC16_LO_DS:
7352 /* In case we're taking addresses of toc entries. */
7353 case R_PPC64_ADDR64:
7354 break;
7355
7356 default:
7357 continue;
7358 }
7359
7360 r_symndx = ELF64_R_SYM (rel->r_info);
7361 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7362 r_symndx, ibfd))
7363 {
7364 free (used);
7365 goto error_ret;
7366 }
7367
7368 if (sym_sec != toc)
7369 continue;
7370
7371 if (h != NULL)
7372 val = h->root.u.def.value;
7373 else
7374 val = sym->st_value;
7375 val += rel->r_addend;
7376
7377 if (val >= toc->size)
7378 continue;
7379
7380 /* For the toc section, we only mark as used if
7381 this entry itself isn't unused. */
7382 if (sec == toc
7383 && !used[val >> 3]
7384 && (used[rel->r_offset >> 3]
7385 || !skip[rel->r_offset >> 3]))
7386 /* Do all the relocs again, to catch reference
7387 chains. */
7388 repeat = 1;
7389
7390 used[val >> 3] = 1;
7391 }
7392 while (repeat);
7393 }
7394
7395 /* Merge the used and skip arrays. Assume that TOC
7396 doublewords not appearing as either used or unused belong
7397 to to an entry more than one doubleword in size. */
7398 for (drop = skip, keep = used, last = 0, some_unused = 0;
7399 drop < skip + (toc->size + 7) / 8;
7400 ++drop, ++keep)
7401 {
7402 if (*keep)
7403 {
7404 *drop = 0;
7405 last = 0;
7406 }
7407 else if (*drop)
7408 {
7409 some_unused = 1;
7410 last = 1;
7411 }
7412 else
7413 *drop = last;
7414 }
7415
7416 free (used);
7417
7418 if (some_unused)
7419 {
7420 bfd_byte *contents, *src;
7421 unsigned long off;
7422
7423 /* Shuffle the toc contents, and at the same time convert the
7424 skip array from booleans into offsets. */
7425 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7426 goto error_ret;
7427
7428 elf_section_data (toc)->this_hdr.contents = contents;
7429
7430 for (src = contents, off = 0, drop = skip;
7431 src < contents + toc->size;
7432 src += 8, ++drop)
7433 {
7434 if (*drop)
7435 {
7436 *drop = (unsigned long) -1;
7437 off += 8;
7438 }
7439 else if (off != 0)
7440 {
7441 *drop = off;
7442 memcpy (src - off, src, 8);
7443 }
7444 }
7445 toc->rawsize = toc->size;
7446 toc->size = src - contents - off;
7447
7448 if (toc->reloc_count != 0)
7449 {
7450 Elf_Internal_Rela *wrel;
7451 bfd_size_type sz;
7452
7453 /* Read toc relocs. */
7454 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7455 TRUE);
7456 if (relstart == NULL)
7457 goto error_ret;
7458
7459 /* Remove unused toc relocs, and adjust those we keep. */
7460 wrel = relstart;
7461 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7462 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7463 {
7464 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7465 wrel->r_info = rel->r_info;
7466 wrel->r_addend = rel->r_addend;
7467 ++wrel;
7468 }
7469 else if (!dec_dynrel_count (rel->r_info, toc, info,
7470 &local_syms, NULL, NULL))
7471 goto error_ret;
7472
7473 toc->reloc_count = wrel - relstart;
7474 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7475 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7476 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7477 }
7478
7479 /* Adjust addends for relocs against the toc section sym. */
7480 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7481 {
7482 if (sec->reloc_count == 0
7483 || elf_discarded_section (sec))
7484 continue;
7485
7486 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7487 TRUE);
7488 if (relstart == NULL)
7489 goto error_ret;
7490
7491 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7492 {
7493 enum elf_ppc64_reloc_type r_type;
7494 unsigned long r_symndx;
7495 asection *sym_sec;
7496 struct elf_link_hash_entry *h;
7497 Elf_Internal_Sym *sym;
7498
7499 r_type = ELF64_R_TYPE (rel->r_info);
7500 switch (r_type)
7501 {
7502 default:
7503 continue;
7504
7505 case R_PPC64_TOC16:
7506 case R_PPC64_TOC16_LO:
7507 case R_PPC64_TOC16_HI:
7508 case R_PPC64_TOC16_HA:
7509 case R_PPC64_TOC16_DS:
7510 case R_PPC64_TOC16_LO_DS:
7511 case R_PPC64_ADDR64:
7512 break;
7513 }
7514
7515 r_symndx = ELF64_R_SYM (rel->r_info);
7516 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7517 r_symndx, ibfd))
7518 goto error_ret;
7519
7520 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7521 continue;
7522
7523 rel->r_addend -= skip[rel->r_addend >> 3];
7524 }
7525 }
7526
7527 /* We shouldn't have local or global symbols defined in the TOC,
7528 but handle them anyway. */
7529 if (local_syms != NULL)
7530 {
7531 Elf_Internal_Sym *sym;
7532
7533 for (sym = local_syms;
7534 sym < local_syms + symtab_hdr->sh_info;
7535 ++sym)
7536 if (sym->st_shndx != SHN_UNDEF
7537 && (sym->st_shndx < SHN_LORESERVE
7538 || sym->st_shndx > SHN_HIRESERVE)
7539 && sym->st_value != 0
7540 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7541 {
7542 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7543 sym->st_value -= skip[sym->st_value >> 3];
7544 else
7545 {
7546 (*_bfd_error_handler)
7547 (_("%s defined in removed toc entry"),
7548 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7549 NULL));
7550 sym->st_value = 0;
7551 sym->st_shndx = SHN_ABS;
7552 }
7553 symtab_hdr->contents = (unsigned char *) local_syms;
7554 }
7555 }
7556
7557 /* Finally, adjust any global syms defined in the toc. */
7558 if (toc_inf.global_toc_syms)
7559 {
7560 toc_inf.toc = toc;
7561 toc_inf.skip = skip;
7562 toc_inf.global_toc_syms = FALSE;
7563 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7564 &toc_inf);
7565 }
7566 }
7567
7568 if (local_syms != NULL
7569 && symtab_hdr->contents != (unsigned char *) local_syms)
7570 {
7571 if (!info->keep_memory)
7572 free (local_syms);
7573 else
7574 symtab_hdr->contents = (unsigned char *) local_syms;
7575 }
7576 free (skip);
7577 }
7578
7579 return TRUE;
7580 }
7581
7582 /* Allocate space in .plt, .got and associated reloc sections for
7583 dynamic relocs. */
7584
7585 static bfd_boolean
7586 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7587 {
7588 struct bfd_link_info *info;
7589 struct ppc_link_hash_table *htab;
7590 asection *s;
7591 struct ppc_link_hash_entry *eh;
7592 struct ppc_dyn_relocs *p;
7593 struct got_entry *gent;
7594
7595 if (h->root.type == bfd_link_hash_indirect)
7596 return TRUE;
7597
7598 if (h->root.type == bfd_link_hash_warning)
7599 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7600
7601 info = (struct bfd_link_info *) inf;
7602 htab = ppc_hash_table (info);
7603
7604 if (htab->elf.dynamic_sections_created
7605 && h->dynindx != -1
7606 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7607 {
7608 struct plt_entry *pent;
7609 bfd_boolean doneone = FALSE;
7610 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7611 if (pent->plt.refcount > 0)
7612 {
7613 /* If this is the first .plt entry, make room for the special
7614 first entry. */
7615 s = htab->plt;
7616 if (s->size == 0)
7617 s->size += PLT_INITIAL_ENTRY_SIZE;
7618
7619 pent->plt.offset = s->size;
7620
7621 /* Make room for this entry. */
7622 s->size += PLT_ENTRY_SIZE;
7623
7624 /* Make room for the .glink code. */
7625 s = htab->glink;
7626 if (s->size == 0)
7627 s->size += GLINK_CALL_STUB_SIZE;
7628 /* We need bigger stubs past index 32767. */
7629 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7630 s->size += 4;
7631 s->size += 2*4;
7632
7633 /* We also need to make an entry in the .rela.plt section. */
7634 s = htab->relplt;
7635 s->size += sizeof (Elf64_External_Rela);
7636 doneone = TRUE;
7637 }
7638 else
7639 pent->plt.offset = (bfd_vma) -1;
7640 if (!doneone)
7641 {
7642 h->plt.plist = NULL;
7643 h->needs_plt = 0;
7644 }
7645 }
7646 else
7647 {
7648 h->plt.plist = NULL;
7649 h->needs_plt = 0;
7650 }
7651
7652 eh = (struct ppc_link_hash_entry *) h;
7653 /* Run through the TLS GD got entries first if we're changing them
7654 to TPREL. */
7655 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7656 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7657 if (gent->got.refcount > 0
7658 && (gent->tls_type & TLS_GD) != 0)
7659 {
7660 /* This was a GD entry that has been converted to TPREL. If
7661 there happens to be a TPREL entry we can use that one. */
7662 struct got_entry *ent;
7663 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7664 if (ent->got.refcount > 0
7665 && (ent->tls_type & TLS_TPREL) != 0
7666 && ent->addend == gent->addend
7667 && ent->owner == gent->owner)
7668 {
7669 gent->got.refcount = 0;
7670 break;
7671 }
7672
7673 /* If not, then we'll be using our own TPREL entry. */
7674 if (gent->got.refcount != 0)
7675 gent->tls_type = TLS_TLS | TLS_TPREL;
7676 }
7677
7678 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7679 if (gent->got.refcount > 0)
7680 {
7681 bfd_boolean dyn;
7682
7683 /* Make sure this symbol is output as a dynamic symbol.
7684 Undefined weak syms won't yet be marked as dynamic,
7685 nor will all TLS symbols. */
7686 if (h->dynindx == -1
7687 && !h->forced_local)
7688 {
7689 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7690 return FALSE;
7691 }
7692
7693 if ((gent->tls_type & TLS_LD) != 0
7694 && !h->def_dynamic)
7695 {
7696 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7697 continue;
7698 }
7699
7700 s = ppc64_elf_tdata (gent->owner)->got;
7701 gent->got.offset = s->size;
7702 s->size
7703 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7704 dyn = htab->elf.dynamic_sections_created;
7705 if ((info->shared
7706 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7707 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7708 || h->root.type != bfd_link_hash_undefweak))
7709 ppc64_elf_tdata (gent->owner)->relgot->size
7710 += (gent->tls_type & eh->tls_mask & TLS_GD
7711 ? 2 * sizeof (Elf64_External_Rela)
7712 : sizeof (Elf64_External_Rela));
7713 }
7714 else
7715 gent->got.offset = (bfd_vma) -1;
7716
7717 if (eh->dyn_relocs == NULL)
7718 return TRUE;
7719
7720 /* In the shared -Bsymbolic case, discard space allocated for
7721 dynamic pc-relative relocs against symbols which turn out to be
7722 defined in regular objects. For the normal shared case, discard
7723 space for relocs that have become local due to symbol visibility
7724 changes. */
7725
7726 if (info->shared)
7727 {
7728 /* Relocs that use pc_count are those that appear on a call insn,
7729 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7730 generated via assembly. We want calls to protected symbols to
7731 resolve directly to the function rather than going via the plt.
7732 If people want function pointer comparisons to work as expected
7733 then they should avoid writing weird assembly. */
7734 if (SYMBOL_CALLS_LOCAL (info, h))
7735 {
7736 struct ppc_dyn_relocs **pp;
7737
7738 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7739 {
7740 p->count -= p->pc_count;
7741 p->pc_count = 0;
7742 if (p->count == 0)
7743 *pp = p->next;
7744 else
7745 pp = &p->next;
7746 }
7747 }
7748
7749 /* Also discard relocs on undefined weak syms with non-default
7750 visibility. */
7751 if (eh->dyn_relocs != NULL
7752 && h->root.type == bfd_link_hash_undefweak)
7753 {
7754 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7755 eh->dyn_relocs = NULL;
7756
7757 /* Make sure this symbol is output as a dynamic symbol.
7758 Undefined weak syms won't yet be marked as dynamic. */
7759 else if (h->dynindx == -1
7760 && !h->forced_local)
7761 {
7762 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7763 return FALSE;
7764 }
7765 }
7766 }
7767 else if (ELIMINATE_COPY_RELOCS)
7768 {
7769 /* For the non-shared case, discard space for relocs against
7770 symbols which turn out to need copy relocs or are not
7771 dynamic. */
7772
7773 if (!h->non_got_ref
7774 && h->def_dynamic
7775 && !h->def_regular)
7776 {
7777 /* Make sure this symbol is output as a dynamic symbol.
7778 Undefined weak syms won't yet be marked as dynamic. */
7779 if (h->dynindx == -1
7780 && !h->forced_local)
7781 {
7782 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7783 return FALSE;
7784 }
7785
7786 /* If that succeeded, we know we'll be keeping all the
7787 relocs. */
7788 if (h->dynindx != -1)
7789 goto keep;
7790 }
7791
7792 eh->dyn_relocs = NULL;
7793
7794 keep: ;
7795 }
7796
7797 /* Finally, allocate space. */
7798 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7799 {
7800 asection *sreloc = elf_section_data (p->sec)->sreloc;
7801 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7802 }
7803
7804 return TRUE;
7805 }
7806
7807 /* Find any dynamic relocs that apply to read-only sections. */
7808
7809 static bfd_boolean
7810 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7811 {
7812 struct ppc_link_hash_entry *eh;
7813 struct ppc_dyn_relocs *p;
7814
7815 if (h->root.type == bfd_link_hash_warning)
7816 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7817
7818 eh = (struct ppc_link_hash_entry *) h;
7819 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7820 {
7821 asection *s = p->sec->output_section;
7822
7823 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7824 {
7825 struct bfd_link_info *info = inf;
7826
7827 info->flags |= DF_TEXTREL;
7828
7829 /* Not an error, just cut short the traversal. */
7830 return FALSE;
7831 }
7832 }
7833 return TRUE;
7834 }
7835
7836 /* Set the sizes of the dynamic sections. */
7837
7838 static bfd_boolean
7839 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7840 struct bfd_link_info *info)
7841 {
7842 struct ppc_link_hash_table *htab;
7843 bfd *dynobj;
7844 asection *s;
7845 bfd_boolean relocs;
7846 bfd *ibfd;
7847
7848 htab = ppc_hash_table (info);
7849 dynobj = htab->elf.dynobj;
7850 if (dynobj == NULL)
7851 abort ();
7852
7853 if (htab->elf.dynamic_sections_created)
7854 {
7855 /* Set the contents of the .interp section to the interpreter. */
7856 if (info->executable)
7857 {
7858 s = bfd_get_section_by_name (dynobj, ".interp");
7859 if (s == NULL)
7860 abort ();
7861 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7862 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7863 }
7864 }
7865
7866 /* Set up .got offsets for local syms, and space for local dynamic
7867 relocs. */
7868 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7869 {
7870 struct got_entry **lgot_ents;
7871 struct got_entry **end_lgot_ents;
7872 char *lgot_masks;
7873 bfd_size_type locsymcount;
7874 Elf_Internal_Shdr *symtab_hdr;
7875 asection *srel;
7876
7877 if (!is_ppc64_elf_target (ibfd->xvec))
7878 continue;
7879
7880 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7881 {
7882 s = ppc64_elf_tdata (ibfd)->got;
7883 ppc64_tlsld_got (ibfd)->offset = s->size;
7884 s->size += 16;
7885 if (info->shared)
7886 {
7887 srel = ppc64_elf_tdata (ibfd)->relgot;
7888 srel->size += sizeof (Elf64_External_Rela);
7889 }
7890 }
7891 else
7892 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7893
7894 for (s = ibfd->sections; s != NULL; s = s->next)
7895 {
7896 struct ppc_dyn_relocs *p;
7897
7898 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7899 {
7900 if (!bfd_is_abs_section (p->sec)
7901 && bfd_is_abs_section (p->sec->output_section))
7902 {
7903 /* Input section has been discarded, either because
7904 it is a copy of a linkonce section or due to
7905 linker script /DISCARD/, so we'll be discarding
7906 the relocs too. */
7907 }
7908 else if (p->count != 0)
7909 {
7910 srel = elf_section_data (p->sec)->sreloc;
7911 srel->size += p->count * sizeof (Elf64_External_Rela);
7912 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7913 info->flags |= DF_TEXTREL;
7914 }
7915 }
7916 }
7917
7918 lgot_ents = elf_local_got_ents (ibfd);
7919 if (!lgot_ents)
7920 continue;
7921
7922 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7923 locsymcount = symtab_hdr->sh_info;
7924 end_lgot_ents = lgot_ents + locsymcount;
7925 lgot_masks = (char *) end_lgot_ents;
7926 s = ppc64_elf_tdata (ibfd)->got;
7927 srel = ppc64_elf_tdata (ibfd)->relgot;
7928 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7929 {
7930 struct got_entry *ent;
7931
7932 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7933 if (ent->got.refcount > 0)
7934 {
7935 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7936 {
7937 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7938 {
7939 ppc64_tlsld_got (ibfd)->offset = s->size;
7940 s->size += 16;
7941 if (info->shared)
7942 srel->size += sizeof (Elf64_External_Rela);
7943 }
7944 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7945 }
7946 else
7947 {
7948 ent->got.offset = s->size;
7949 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7950 {
7951 s->size += 16;
7952 if (info->shared)
7953 srel->size += 2 * sizeof (Elf64_External_Rela);
7954 }
7955 else
7956 {
7957 s->size += 8;
7958 if (info->shared)
7959 srel->size += sizeof (Elf64_External_Rela);
7960 }
7961 }
7962 }
7963 else
7964 ent->got.offset = (bfd_vma) -1;
7965 }
7966 }
7967
7968 /* Allocate global sym .plt and .got entries, and space for global
7969 sym dynamic relocs. */
7970 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7971
7972 /* We now have determined the sizes of the various dynamic sections.
7973 Allocate memory for them. */
7974 relocs = FALSE;
7975 for (s = dynobj->sections; s != NULL; s = s->next)
7976 {
7977 if ((s->flags & SEC_LINKER_CREATED) == 0)
7978 continue;
7979
7980 if (s == htab->brlt || s == htab->relbrlt)
7981 /* These haven't been allocated yet; don't strip. */
7982 continue;
7983 else if (s == htab->got
7984 || s == htab->plt
7985 || s == htab->glink
7986 || s == htab->dynbss)
7987 {
7988 /* Strip this section if we don't need it; see the
7989 comment below. */
7990 }
7991 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7992 {
7993 if (s->size != 0)
7994 {
7995 if (s != htab->relplt)
7996 relocs = TRUE;
7997
7998 /* We use the reloc_count field as a counter if we need
7999 to copy relocs into the output file. */
8000 s->reloc_count = 0;
8001 }
8002 }
8003 else
8004 {
8005 /* It's not one of our sections, so don't allocate space. */
8006 continue;
8007 }
8008
8009 if (s->size == 0)
8010 {
8011 /* If we don't need this section, strip it from the
8012 output file. This is mostly to handle .rela.bss and
8013 .rela.plt. We must create both sections in
8014 create_dynamic_sections, because they must be created
8015 before the linker maps input sections to output
8016 sections. The linker does that before
8017 adjust_dynamic_symbol is called, and it is that
8018 function which decides whether anything needs to go
8019 into these sections. */
8020 s->flags |= SEC_EXCLUDE;
8021 continue;
8022 }
8023
8024 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8025 continue;
8026
8027 /* Allocate memory for the section contents. We use bfd_zalloc
8028 here in case unused entries are not reclaimed before the
8029 section's contents are written out. This should not happen,
8030 but this way if it does we get a R_PPC64_NONE reloc in .rela
8031 sections instead of garbage.
8032 We also rely on the section contents being zero when writing
8033 the GOT. */
8034 s->contents = bfd_zalloc (dynobj, s->size);
8035 if (s->contents == NULL)
8036 return FALSE;
8037 }
8038
8039 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8040 {
8041 if (!is_ppc64_elf_target (ibfd->xvec))
8042 continue;
8043
8044 s = ppc64_elf_tdata (ibfd)->got;
8045 if (s != NULL && s != htab->got)
8046 {
8047 if (s->size == 0)
8048 s->flags |= SEC_EXCLUDE;
8049 else
8050 {
8051 s->contents = bfd_zalloc (ibfd, s->size);
8052 if (s->contents == NULL)
8053 return FALSE;
8054 }
8055 }
8056 s = ppc64_elf_tdata (ibfd)->relgot;
8057 if (s != NULL)
8058 {
8059 if (s->size == 0)
8060 s->flags |= SEC_EXCLUDE;
8061 else
8062 {
8063 s->contents = bfd_zalloc (ibfd, s->size);
8064 if (s->contents == NULL)
8065 return FALSE;
8066 relocs = TRUE;
8067 s->reloc_count = 0;
8068 }
8069 }
8070 }
8071
8072 if (htab->elf.dynamic_sections_created)
8073 {
8074 /* Add some entries to the .dynamic section. We fill in the
8075 values later, in ppc64_elf_finish_dynamic_sections, but we
8076 must add the entries now so that we get the correct size for
8077 the .dynamic section. The DT_DEBUG entry is filled in by the
8078 dynamic linker and used by the debugger. */
8079 #define add_dynamic_entry(TAG, VAL) \
8080 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8081
8082 if (info->executable)
8083 {
8084 if (!add_dynamic_entry (DT_DEBUG, 0))
8085 return FALSE;
8086 }
8087
8088 if (htab->plt != NULL && htab->plt->size != 0)
8089 {
8090 if (!add_dynamic_entry (DT_PLTGOT, 0)
8091 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8092 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8093 || !add_dynamic_entry (DT_JMPREL, 0)
8094 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8095 return FALSE;
8096 }
8097
8098 if (NO_OPD_RELOCS)
8099 {
8100 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8101 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8102 return FALSE;
8103 }
8104
8105 if (relocs)
8106 {
8107 if (!add_dynamic_entry (DT_RELA, 0)
8108 || !add_dynamic_entry (DT_RELASZ, 0)
8109 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8110 return FALSE;
8111
8112 /* If any dynamic relocs apply to a read-only section,
8113 then we need a DT_TEXTREL entry. */
8114 if ((info->flags & DF_TEXTREL) == 0)
8115 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8116
8117 if ((info->flags & DF_TEXTREL) != 0)
8118 {
8119 if (!add_dynamic_entry (DT_TEXTREL, 0))
8120 return FALSE;
8121 }
8122 }
8123 }
8124 #undef add_dynamic_entry
8125
8126 return TRUE;
8127 }
8128
8129 /* Determine the type of stub needed, if any, for a call. */
8130
8131 static inline enum ppc_stub_type
8132 ppc_type_of_stub (asection *input_sec,
8133 const Elf_Internal_Rela *rel,
8134 struct ppc_link_hash_entry **hash,
8135 bfd_vma destination)
8136 {
8137 struct ppc_link_hash_entry *h = *hash;
8138 bfd_vma location;
8139 bfd_vma branch_offset;
8140 bfd_vma max_branch_offset;
8141 enum elf_ppc64_reloc_type r_type;
8142
8143 if (h != NULL)
8144 {
8145 struct ppc_link_hash_entry *fdh = h;
8146 if (fdh->oh != NULL
8147 && fdh->oh->is_func_descriptor)
8148 fdh = fdh->oh;
8149
8150 if (fdh->elf.dynindx != -1)
8151 {
8152 struct plt_entry *ent;
8153
8154 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8155 if (ent->addend == rel->r_addend
8156 && ent->plt.offset != (bfd_vma) -1)
8157 {
8158 *hash = fdh;
8159 return ppc_stub_plt_call;
8160 }
8161 }
8162
8163 /* Here, we know we don't have a plt entry. If we don't have a
8164 either a defined function descriptor or a defined entry symbol
8165 in a regular object file, then it is pointless trying to make
8166 any other type of stub. */
8167 if (!((fdh->elf.root.type == bfd_link_hash_defined
8168 || fdh->elf.root.type == bfd_link_hash_defweak)
8169 && fdh->elf.root.u.def.section->output_section != NULL)
8170 && !((h->elf.root.type == bfd_link_hash_defined
8171 || h->elf.root.type == bfd_link_hash_defweak)
8172 && h->elf.root.u.def.section->output_section != NULL))
8173 return ppc_stub_none;
8174 }
8175
8176 /* Determine where the call point is. */
8177 location = (input_sec->output_offset
8178 + input_sec->output_section->vma
8179 + rel->r_offset);
8180
8181 branch_offset = destination - location;
8182 r_type = ELF64_R_TYPE (rel->r_info);
8183
8184 /* Determine if a long branch stub is needed. */
8185 max_branch_offset = 1 << 25;
8186 if (r_type != R_PPC64_REL24)
8187 max_branch_offset = 1 << 15;
8188
8189 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8190 /* We need a stub. Figure out whether a long_branch or plt_branch
8191 is needed later. */
8192 return ppc_stub_long_branch;
8193
8194 return ppc_stub_none;
8195 }
8196
8197 /* Build a .plt call stub. */
8198
8199 static inline bfd_byte *
8200 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8201 {
8202 #define PPC_LO(v) ((v) & 0xffff)
8203 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8204 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8205
8206 if (PPC_HA (offset) != 0)
8207 {
8208 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8209 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8210 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8211 if (PPC_HA (offset + 16) != PPC_HA (offset))
8212 {
8213 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8214 offset = 0;
8215 }
8216 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8217 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8218 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8219 bfd_put_32 (obfd, BCTR, p), p += 4;
8220 }
8221 else
8222 {
8223 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8224 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8225 if (PPC_HA (offset + 16) != PPC_HA (offset))
8226 {
8227 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8228 offset = 0;
8229 }
8230 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8231 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8232 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8233 bfd_put_32 (obfd, BCTR, p), p += 4;
8234 }
8235 return p;
8236 }
8237
8238 static bfd_boolean
8239 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8240 {
8241 struct ppc_stub_hash_entry *stub_entry;
8242 struct ppc_branch_hash_entry *br_entry;
8243 struct bfd_link_info *info;
8244 struct ppc_link_hash_table *htab;
8245 bfd_byte *loc;
8246 bfd_byte *p;
8247 unsigned int indx;
8248 struct plt_entry *ent;
8249 bfd_vma dest, off;
8250 int size;
8251
8252 /* Massage our args to the form they really have. */
8253 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8254 info = in_arg;
8255
8256 htab = ppc_hash_table (info);
8257
8258 /* Make a note of the offset within the stubs for this entry. */
8259 stub_entry->stub_offset = stub_entry->stub_sec->size;
8260 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8261
8262 htab->stub_count[stub_entry->stub_type - 1] += 1;
8263 switch (stub_entry->stub_type)
8264 {
8265 case ppc_stub_long_branch:
8266 case ppc_stub_long_branch_r2off:
8267 /* Branches are relative. This is where we are going to. */
8268 off = dest = (stub_entry->target_value
8269 + stub_entry->target_section->output_offset
8270 + stub_entry->target_section->output_section->vma);
8271
8272 /* And this is where we are coming from. */
8273 off -= (stub_entry->stub_offset
8274 + stub_entry->stub_sec->output_offset
8275 + stub_entry->stub_sec->output_section->vma);
8276
8277 size = 4;
8278 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8279 {
8280 bfd_vma r2off;
8281
8282 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8283 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8284 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8285 loc += 4;
8286 size = 12;
8287 if (PPC_HA (r2off) != 0)
8288 {
8289 size = 16;
8290 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8291 loc += 4;
8292 }
8293 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8294 loc += 4;
8295 off -= size - 4;
8296 }
8297 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8298
8299 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8300 {
8301 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8302 stub_entry->root.string);
8303 htab->stub_error = TRUE;
8304 return FALSE;
8305 }
8306
8307 if (info->emitrelocations)
8308 {
8309 Elf_Internal_Rela *relocs, *r;
8310 struct bfd_elf_section_data *elfsec_data;
8311
8312 elfsec_data = elf_section_data (stub_entry->stub_sec);
8313 relocs = elfsec_data->relocs;
8314 if (relocs == NULL)
8315 {
8316 bfd_size_type relsize;
8317 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8318 relocs = bfd_alloc (htab->stub_bfd, relsize);
8319 if (relocs == NULL)
8320 return FALSE;
8321 elfsec_data->relocs = relocs;
8322 elfsec_data->rel_hdr.sh_size = (stub_entry->stub_sec->reloc_count
8323 * sizeof (Elf64_External_Rela));
8324 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8325 stub_entry->stub_sec->reloc_count = 0;
8326 }
8327 r = relocs + stub_entry->stub_sec->reloc_count;
8328 stub_entry->stub_sec->reloc_count += 1;
8329 r->r_offset = loc - stub_entry->stub_sec->contents;
8330 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8331 r->r_addend = dest;
8332 if (stub_entry->h != NULL)
8333 {
8334 struct elf_link_hash_entry **hashes;
8335 unsigned long symndx;
8336 struct ppc_link_hash_entry *h;
8337
8338 hashes = elf_sym_hashes (htab->stub_bfd);
8339 if (hashes == NULL)
8340 {
8341 bfd_size_type hsize;
8342
8343 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8344 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8345 if (hashes == NULL)
8346 return FALSE;
8347 elf_sym_hashes (htab->stub_bfd) = hashes;
8348 htab->stub_globals = 1;
8349 }
8350 symndx = htab->stub_globals++;
8351 h = stub_entry->h;
8352 hashes[symndx] = &h->elf;
8353 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8354 if (h->oh != NULL && h->oh->is_func)
8355 h = h->oh;
8356 if (h->elf.root.u.def.section != stub_entry->target_section)
8357 /* H is an opd symbol. The addend must be zero. */
8358 r->r_addend = 0;
8359 else
8360 {
8361 off = (h->elf.root.u.def.value
8362 + h->elf.root.u.def.section->output_offset
8363 + h->elf.root.u.def.section->output_section->vma);
8364 r->r_addend -= off;
8365 }
8366 }
8367 }
8368 break;
8369
8370 case ppc_stub_plt_branch:
8371 case ppc_stub_plt_branch_r2off:
8372 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8373 stub_entry->root.string + 9,
8374 FALSE, FALSE);
8375 if (br_entry == NULL)
8376 {
8377 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8378 stub_entry->root.string);
8379 htab->stub_error = TRUE;
8380 return FALSE;
8381 }
8382
8383 off = (stub_entry->target_value
8384 + stub_entry->target_section->output_offset
8385 + stub_entry->target_section->output_section->vma);
8386
8387 bfd_put_64 (htab->brlt->owner, off,
8388 htab->brlt->contents + br_entry->offset);
8389
8390 if (htab->relbrlt != NULL)
8391 {
8392 /* Create a reloc for the branch lookup table entry. */
8393 Elf_Internal_Rela rela;
8394 bfd_byte *rl;
8395
8396 rela.r_offset = (br_entry->offset
8397 + htab->brlt->output_offset
8398 + htab->brlt->output_section->vma);
8399 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8400 rela.r_addend = off;
8401
8402 rl = htab->relbrlt->contents;
8403 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8404 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8405 }
8406 else if (info->emitrelocations)
8407 {
8408 Elf_Internal_Rela *relocs, *r;
8409 struct bfd_elf_section_data *elfsec_data;
8410
8411 elfsec_data = elf_section_data (htab->brlt);
8412 relocs = elfsec_data->relocs;
8413 if (relocs == NULL)
8414 {
8415 bfd_size_type relsize;
8416 relsize = htab->brlt->reloc_count * sizeof (*relocs);
8417 relocs = bfd_alloc (htab->brlt->owner, relsize);
8418 if (relocs == NULL)
8419 return FALSE;
8420 elfsec_data->relocs = relocs;
8421 elfsec_data->rel_hdr.sh_size = (stub_entry->stub_sec->reloc_count
8422 * sizeof (Elf64_External_Rela));
8423 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8424 htab->brlt->reloc_count = 0;
8425 }
8426 r = relocs + htab->brlt->reloc_count;
8427 htab->brlt->reloc_count += 1;
8428 r->r_offset = (br_entry->offset
8429 + htab->brlt->output_offset
8430 + htab->brlt->output_section->vma);
8431 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8432 r->r_addend = off;
8433 }
8434
8435 off = (br_entry->offset
8436 + htab->brlt->output_offset
8437 + htab->brlt->output_section->vma
8438 - elf_gp (htab->brlt->output_section->owner)
8439 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8440
8441 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8442 {
8443 (*_bfd_error_handler)
8444 (_("linkage table error against `%s'"),
8445 stub_entry->root.string);
8446 bfd_set_error (bfd_error_bad_value);
8447 htab->stub_error = TRUE;
8448 return FALSE;
8449 }
8450
8451 indx = off;
8452 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8453 {
8454 if (PPC_HA (indx) != 0)
8455 {
8456 size = 16;
8457 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8458 loc += 4;
8459 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8460 }
8461 else
8462 {
8463 size = 12;
8464 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8465 }
8466 }
8467 else
8468 {
8469 bfd_vma r2off;
8470
8471 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8472 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8473 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8474 loc += 4;
8475 size = 20;
8476 if (PPC_HA (indx) != 0)
8477 {
8478 size += 4;
8479 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8480 loc += 4;
8481 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8482 loc += 4;
8483 }
8484 else
8485 {
8486 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8487 loc += 4;
8488 }
8489
8490 if (PPC_HA (r2off) != 0)
8491 {
8492 size += 4;
8493 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8494 loc += 4;
8495 }
8496 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8497 }
8498 loc += 4;
8499 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8500 loc += 4;
8501 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8502 break;
8503
8504 case ppc_stub_plt_call:
8505 /* Do the best we can for shared libraries built without
8506 exporting ".foo" for each "foo". This can happen when symbol
8507 versioning scripts strip all bar a subset of symbols. */
8508 if (stub_entry->h->oh != NULL
8509 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8510 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8511 {
8512 /* Point the symbol at the stub. There may be multiple stubs,
8513 we don't really care; The main thing is to make this sym
8514 defined somewhere. Maybe defining the symbol in the stub
8515 section is a silly idea. If we didn't do this, htab->top_id
8516 could disappear. */
8517 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8518 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8519 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8520 }
8521
8522 /* Now build the stub. */
8523 off = (bfd_vma) -1;
8524 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8525 if (ent->addend == stub_entry->addend)
8526 {
8527 off = ent->plt.offset;
8528 break;
8529 }
8530 if (off >= (bfd_vma) -2)
8531 abort ();
8532
8533 off &= ~ (bfd_vma) 1;
8534 off += (htab->plt->output_offset
8535 + htab->plt->output_section->vma
8536 - elf_gp (htab->plt->output_section->owner)
8537 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8538
8539 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8540 {
8541 (*_bfd_error_handler)
8542 (_("linkage table error against `%s'"),
8543 stub_entry->h->elf.root.root.string);
8544 bfd_set_error (bfd_error_bad_value);
8545 htab->stub_error = TRUE;
8546 return FALSE;
8547 }
8548
8549 p = build_plt_stub (htab->stub_bfd, loc, off);
8550 size = p - loc;
8551 break;
8552
8553 default:
8554 BFD_FAIL ();
8555 return FALSE;
8556 }
8557
8558 stub_entry->stub_sec->size += size;
8559
8560 if (htab->emit_stub_syms)
8561 {
8562 struct elf_link_hash_entry *h;
8563 size_t len1, len2;
8564 char *name;
8565 const char *const stub_str[] = { "long_branch",
8566 "long_branch_r2off",
8567 "plt_branch",
8568 "plt_branch_r2off",
8569 "plt_call" };
8570
8571 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8572 len2 = strlen (stub_entry->root.string);
8573 name = bfd_malloc (len1 + len2 + 2);
8574 if (name == NULL)
8575 return FALSE;
8576 memcpy (name, stub_entry->root.string, 9);
8577 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8578 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8579 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8580 if (h == NULL)
8581 return FALSE;
8582 if (h->root.type == bfd_link_hash_new)
8583 {
8584 h->root.type = bfd_link_hash_defined;
8585 h->root.u.def.section = stub_entry->stub_sec;
8586 h->root.u.def.value = stub_entry->stub_offset;
8587 h->ref_regular = 1;
8588 h->def_regular = 1;
8589 h->ref_regular_nonweak = 1;
8590 h->forced_local = 1;
8591 h->non_elf = 0;
8592 }
8593 }
8594
8595 return TRUE;
8596 }
8597
8598 /* As above, but don't actually build the stub. Just bump offset so
8599 we know stub section sizes, and select plt_branch stubs where
8600 long_branch stubs won't do. */
8601
8602 static bfd_boolean
8603 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8604 {
8605 struct ppc_stub_hash_entry *stub_entry;
8606 struct bfd_link_info *info;
8607 struct ppc_link_hash_table *htab;
8608 bfd_vma off;
8609 int size;
8610
8611 /* Massage our args to the form they really have. */
8612 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8613 info = in_arg;
8614
8615 htab = ppc_hash_table (info);
8616
8617 if (stub_entry->stub_type == ppc_stub_plt_call)
8618 {
8619 struct plt_entry *ent;
8620 off = (bfd_vma) -1;
8621 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8622 if (ent->addend == stub_entry->addend)
8623 {
8624 off = ent->plt.offset & ~(bfd_vma) 1;
8625 break;
8626 }
8627 if (off >= (bfd_vma) -2)
8628 abort ();
8629 off += (htab->plt->output_offset
8630 + htab->plt->output_section->vma
8631 - elf_gp (htab->plt->output_section->owner)
8632 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8633
8634 size = PLT_CALL_STUB_SIZE;
8635 if (PPC_HA (off) == 0)
8636 size -= 4;
8637 if (PPC_HA (off + 16) != PPC_HA (off))
8638 size += 4;
8639 }
8640 else
8641 {
8642 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8643 variants. */
8644 bfd_vma r2off = 0;
8645
8646 off = (stub_entry->target_value
8647 + stub_entry->target_section->output_offset
8648 + stub_entry->target_section->output_section->vma);
8649 off -= (stub_entry->stub_sec->size
8650 + stub_entry->stub_sec->output_offset
8651 + stub_entry->stub_sec->output_section->vma);
8652
8653 /* Reset the stub type from the plt variant in case we now
8654 can reach with a shorter stub. */
8655 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8656 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8657
8658 size = 4;
8659 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8660 {
8661 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8662 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8663 size = 12;
8664 if (PPC_HA (r2off) != 0)
8665 size = 16;
8666 off -= size - 4;
8667 }
8668
8669 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8670 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8671 {
8672 struct ppc_branch_hash_entry *br_entry;
8673 unsigned int indx;
8674
8675 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8676 stub_entry->root.string + 9,
8677 TRUE, FALSE);
8678 if (br_entry == NULL)
8679 {
8680 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8681 stub_entry->root.string);
8682 htab->stub_error = TRUE;
8683 return FALSE;
8684 }
8685
8686 if (br_entry->iter != htab->stub_iteration)
8687 {
8688 br_entry->iter = htab->stub_iteration;
8689 br_entry->offset = htab->brlt->size;
8690 htab->brlt->size += 8;
8691
8692 if (htab->relbrlt != NULL)
8693 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8694 else if (info->emitrelocations)
8695 {
8696 htab->brlt->reloc_count += 1;
8697 htab->brlt->flags |= SEC_RELOC;
8698 }
8699 }
8700
8701 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8702 off = (br_entry->offset
8703 + htab->brlt->output_offset
8704 + htab->brlt->output_section->vma
8705 - elf_gp (htab->brlt->output_section->owner)
8706 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8707
8708 indx = off;
8709 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8710 {
8711 size = 12;
8712 if (PPC_HA (indx) != 0)
8713 size = 16;
8714 }
8715 else
8716 {
8717 size = 20;
8718 if (PPC_HA (indx) != 0)
8719 size += 4;
8720
8721 if (PPC_HA (r2off) != 0)
8722 size += 4;
8723 }
8724 }
8725 else if (info->emitrelocations)
8726 {
8727 stub_entry->stub_sec->reloc_count += 1;
8728 stub_entry->stub_sec->flags |= SEC_RELOC;
8729 }
8730 }
8731
8732 stub_entry->stub_sec->size += size;
8733 return TRUE;
8734 }
8735
8736 /* Set up various things so that we can make a list of input sections
8737 for each output section included in the link. Returns -1 on error,
8738 0 when no stubs will be needed, and 1 on success. */
8739
8740 int
8741 ppc64_elf_setup_section_lists (bfd *output_bfd,
8742 struct bfd_link_info *info,
8743 int no_multi_toc)
8744 {
8745 bfd *input_bfd;
8746 int top_id, top_index, id;
8747 asection *section;
8748 asection **input_list;
8749 bfd_size_type amt;
8750 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8751
8752 htab->no_multi_toc = no_multi_toc;
8753
8754 if (htab->brlt == NULL)
8755 return 0;
8756
8757 /* Find the top input section id. */
8758 for (input_bfd = info->input_bfds, top_id = 3;
8759 input_bfd != NULL;
8760 input_bfd = input_bfd->link_next)
8761 {
8762 for (section = input_bfd->sections;
8763 section != NULL;
8764 section = section->next)
8765 {
8766 if (top_id < section->id)
8767 top_id = section->id;
8768 }
8769 }
8770
8771 htab->top_id = top_id;
8772 amt = sizeof (struct map_stub) * (top_id + 1);
8773 htab->stub_group = bfd_zmalloc (amt);
8774 if (htab->stub_group == NULL)
8775 return -1;
8776
8777 /* Set toc_off for com, und, abs and ind sections. */
8778 for (id = 0; id < 3; id++)
8779 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8780
8781 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8782
8783 /* We can't use output_bfd->section_count here to find the top output
8784 section index as some sections may have been removed, and
8785 strip_excluded_output_sections doesn't renumber the indices. */
8786 for (section = output_bfd->sections, top_index = 0;
8787 section != NULL;
8788 section = section->next)
8789 {
8790 if (top_index < section->index)
8791 top_index = section->index;
8792 }
8793
8794 htab->top_index = top_index;
8795 amt = sizeof (asection *) * (top_index + 1);
8796 input_list = bfd_zmalloc (amt);
8797 htab->input_list = input_list;
8798 if (input_list == NULL)
8799 return -1;
8800
8801 return 1;
8802 }
8803
8804 /* The linker repeatedly calls this function for each TOC input section
8805 and linker generated GOT section. Group input bfds such that the toc
8806 within a group is less than 64k in size. Will break with cute linker
8807 scripts that play games with dot in the output toc section. */
8808
8809 void
8810 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8811 {
8812 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8813
8814 if (!htab->no_multi_toc)
8815 {
8816 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8817 bfd_vma off = addr - htab->toc_curr;
8818
8819 if (off + isec->size > 0x10000)
8820 htab->toc_curr = addr;
8821
8822 elf_gp (isec->owner) = (htab->toc_curr
8823 - elf_gp (isec->output_section->owner)
8824 + TOC_BASE_OFF);
8825 }
8826 }
8827
8828 /* Called after the last call to the above function. */
8829
8830 void
8831 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8832 {
8833 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8834
8835 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8836
8837 /* toc_curr tracks the TOC offset used for code sections below in
8838 ppc64_elf_next_input_section. Start off at 0x8000. */
8839 htab->toc_curr = TOC_BASE_OFF;
8840 }
8841
8842 /* No toc references were found in ISEC. If the code in ISEC makes no
8843 calls, then there's no need to use toc adjusting stubs when branching
8844 into ISEC. Actually, indirect calls from ISEC are OK as they will
8845 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8846 needed, and 2 if a cyclical call-graph was found but no other reason
8847 for a stub was detected. If called from the top level, a return of
8848 2 means the same as a return of 0. */
8849
8850 static int
8851 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8852 {
8853 Elf_Internal_Rela *relstart, *rel;
8854 Elf_Internal_Sym *local_syms;
8855 int ret;
8856 struct ppc_link_hash_table *htab;
8857
8858 /* We know none of our code bearing sections will need toc stubs. */
8859 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8860 return 0;
8861
8862 if (isec->size == 0)
8863 return 0;
8864
8865 if (isec->output_section == NULL)
8866 return 0;
8867
8868 /* Hack for linux kernel. .fixup contains branches, but only back to
8869 the function that hit an exception. */
8870 if (strcmp (isec->name, ".fixup") == 0)
8871 return 0;
8872
8873 if (isec->reloc_count == 0)
8874 return 0;
8875
8876 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8877 info->keep_memory);
8878 if (relstart == NULL)
8879 return -1;
8880
8881 /* Look for branches to outside of this section. */
8882 local_syms = NULL;
8883 ret = 0;
8884 htab = ppc_hash_table (info);
8885 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8886 {
8887 enum elf_ppc64_reloc_type r_type;
8888 unsigned long r_symndx;
8889 struct elf_link_hash_entry *h;
8890 Elf_Internal_Sym *sym;
8891 asection *sym_sec;
8892 long *opd_adjust;
8893 bfd_vma sym_value;
8894 bfd_vma dest;
8895
8896 r_type = ELF64_R_TYPE (rel->r_info);
8897 if (r_type != R_PPC64_REL24
8898 && r_type != R_PPC64_REL14
8899 && r_type != R_PPC64_REL14_BRTAKEN
8900 && r_type != R_PPC64_REL14_BRNTAKEN)
8901 continue;
8902
8903 r_symndx = ELF64_R_SYM (rel->r_info);
8904 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8905 isec->owner))
8906 {
8907 ret = -1;
8908 break;
8909 }
8910
8911 /* Calls to dynamic lib functions go through a plt call stub
8912 that uses r2. Branches to undefined symbols might be a call
8913 using old-style dot symbols that can be satisfied by a plt
8914 call into a new-style dynamic library. */
8915 if (sym_sec == NULL)
8916 {
8917 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8918 if (eh != NULL
8919 && eh->oh != NULL
8920 && eh->oh->elf.plt.plist != NULL)
8921 {
8922 ret = 1;
8923 break;
8924 }
8925
8926 /* Ignore other undefined symbols. */
8927 continue;
8928 }
8929
8930 /* Assume branches to other sections not included in the link need
8931 stubs too, to cover -R and absolute syms. */
8932 if (sym_sec->output_section == NULL)
8933 {
8934 ret = 1;
8935 break;
8936 }
8937
8938 if (h == NULL)
8939 sym_value = sym->st_value;
8940 else
8941 {
8942 if (h->root.type != bfd_link_hash_defined
8943 && h->root.type != bfd_link_hash_defweak)
8944 abort ();
8945 sym_value = h->root.u.def.value;
8946 }
8947 sym_value += rel->r_addend;
8948
8949 /* If this branch reloc uses an opd sym, find the code section. */
8950 opd_adjust = get_opd_info (sym_sec);
8951 if (opd_adjust != NULL)
8952 {
8953 if (h == NULL)
8954 {
8955 long adjust;
8956
8957 adjust = opd_adjust[sym->st_value / 8];
8958 if (adjust == -1)
8959 /* Assume deleted functions won't ever be called. */
8960 continue;
8961 sym_value += adjust;
8962 }
8963
8964 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8965 if (dest == (bfd_vma) -1)
8966 continue;
8967 }
8968 else
8969 dest = (sym_value
8970 + sym_sec->output_offset
8971 + sym_sec->output_section->vma);
8972
8973 /* Ignore branch to self. */
8974 if (sym_sec == isec)
8975 continue;
8976
8977 /* If the called function uses the toc, we need a stub. */
8978 if (sym_sec->has_toc_reloc
8979 || sym_sec->makes_toc_func_call)
8980 {
8981 ret = 1;
8982 break;
8983 }
8984
8985 /* Assume any branch that needs a long branch stub might in fact
8986 need a plt_branch stub. A plt_branch stub uses r2. */
8987 else if (dest - (isec->output_offset
8988 + isec->output_section->vma
8989 + rel->r_offset) + (1 << 25) >= (2 << 25))
8990 {
8991 ret = 1;
8992 break;
8993 }
8994
8995 /* If calling back to a section in the process of being tested, we
8996 can't say for sure that no toc adjusting stubs are needed, so
8997 don't return zero. */
8998 else if (sym_sec->call_check_in_progress)
8999 ret = 2;
9000
9001 /* Branches to another section that itself doesn't have any TOC
9002 references are OK. Recursively call ourselves to check. */
9003 else if (sym_sec->id <= htab->top_id
9004 && htab->stub_group[sym_sec->id].toc_off == 0)
9005 {
9006 int recur;
9007
9008 /* Mark current section as indeterminate, so that other
9009 sections that call back to current won't be marked as
9010 known. */
9011 isec->call_check_in_progress = 1;
9012 recur = toc_adjusting_stub_needed (info, sym_sec);
9013 isec->call_check_in_progress = 0;
9014
9015 if (recur < 0)
9016 {
9017 /* An error. Exit. */
9018 ret = -1;
9019 break;
9020 }
9021 else if (recur <= 1)
9022 {
9023 /* Known result. Mark as checked and set section flag. */
9024 htab->stub_group[sym_sec->id].toc_off = 1;
9025 if (recur != 0)
9026 {
9027 sym_sec->makes_toc_func_call = 1;
9028 ret = 1;
9029 break;
9030 }
9031 }
9032 else
9033 {
9034 /* Unknown result. Continue checking. */
9035 ret = 2;
9036 }
9037 }
9038 }
9039
9040 if (local_syms != NULL
9041 && (elf_tdata (isec->owner)->symtab_hdr.contents
9042 != (unsigned char *) local_syms))
9043 free (local_syms);
9044 if (elf_section_data (isec)->relocs != relstart)
9045 free (relstart);
9046
9047 return ret;
9048 }
9049
9050 /* The linker repeatedly calls this function for each input section,
9051 in the order that input sections are linked into output sections.
9052 Build lists of input sections to determine groupings between which
9053 we may insert linker stubs. */
9054
9055 bfd_boolean
9056 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9057 {
9058 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9059
9060 if ((isec->output_section->flags & SEC_CODE) != 0
9061 && isec->output_section->index <= htab->top_index)
9062 {
9063 asection **list = htab->input_list + isec->output_section->index;
9064 /* Steal the link_sec pointer for our list. */
9065 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9066 /* This happens to make the list in reverse order,
9067 which is what we want. */
9068 PREV_SEC (isec) = *list;
9069 *list = isec;
9070 }
9071
9072 if (htab->multi_toc_needed)
9073 {
9074 /* If a code section has a function that uses the TOC then we need
9075 to use the right TOC (obviously). Also, make sure that .opd gets
9076 the correct TOC value for R_PPC64_TOC relocs that don't have or
9077 can't find their function symbol (shouldn't ever happen now). */
9078 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
9079 {
9080 if (elf_gp (isec->owner) != 0)
9081 htab->toc_curr = elf_gp (isec->owner);
9082 }
9083 else if (htab->stub_group[isec->id].toc_off == 0)
9084 {
9085 int ret = toc_adjusting_stub_needed (info, isec);
9086 if (ret < 0)
9087 return FALSE;
9088 else
9089 isec->makes_toc_func_call = ret & 1;
9090 }
9091 }
9092
9093 /* Functions that don't use the TOC can belong in any TOC group.
9094 Use the last TOC base. This happens to make _init and _fini
9095 pasting work. */
9096 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9097 return TRUE;
9098 }
9099
9100 /* See whether we can group stub sections together. Grouping stub
9101 sections may result in fewer stubs. More importantly, we need to
9102 put all .init* and .fini* stubs at the beginning of the .init or
9103 .fini output sections respectively, because glibc splits the
9104 _init and _fini functions into multiple parts. Putting a stub in
9105 the middle of a function is not a good idea. */
9106
9107 static void
9108 group_sections (struct ppc_link_hash_table *htab,
9109 bfd_size_type stub_group_size,
9110 bfd_boolean stubs_always_before_branch)
9111 {
9112 asection **list;
9113 bfd_size_type stub14_group_size;
9114 bfd_boolean suppress_size_errors;
9115
9116 suppress_size_errors = FALSE;
9117 stub14_group_size = stub_group_size;
9118 if (stub_group_size == 1)
9119 {
9120 /* Default values. */
9121 if (stubs_always_before_branch)
9122 {
9123 stub_group_size = 0x1e00000;
9124 stub14_group_size = 0x7800;
9125 }
9126 else
9127 {
9128 stub_group_size = 0x1c00000;
9129 stub14_group_size = 0x7000;
9130 }
9131 suppress_size_errors = TRUE;
9132 }
9133
9134 list = htab->input_list + htab->top_index;
9135 do
9136 {
9137 asection *tail = *list;
9138 while (tail != NULL)
9139 {
9140 asection *curr;
9141 asection *prev;
9142 bfd_size_type total;
9143 bfd_boolean big_sec;
9144 bfd_vma curr_toc;
9145
9146 curr = tail;
9147 total = tail->size;
9148 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9149 ? stub14_group_size : stub_group_size);
9150 if (big_sec && !suppress_size_errors)
9151 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9152 tail->owner, tail);
9153 curr_toc = htab->stub_group[tail->id].toc_off;
9154
9155 while ((prev = PREV_SEC (curr)) != NULL
9156 && ((total += curr->output_offset - prev->output_offset)
9157 < (ppc64_elf_section_data (prev)->has_14bit_branch
9158 ? stub14_group_size : stub_group_size))
9159 && htab->stub_group[prev->id].toc_off == curr_toc)
9160 curr = prev;
9161
9162 /* OK, the size from the start of CURR to the end is less
9163 than stub_group_size and thus can be handled by one stub
9164 section. (or the tail section is itself larger than
9165 stub_group_size, in which case we may be toast.) We
9166 should really be keeping track of the total size of stubs
9167 added here, as stubs contribute to the final output
9168 section size. That's a little tricky, and this way will
9169 only break if stubs added make the total size more than
9170 2^25, ie. for the default stub_group_size, if stubs total
9171 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9172 do
9173 {
9174 prev = PREV_SEC (tail);
9175 /* Set up this stub group. */
9176 htab->stub_group[tail->id].link_sec = curr;
9177 }
9178 while (tail != curr && (tail = prev) != NULL);
9179
9180 /* But wait, there's more! Input sections up to stub_group_size
9181 bytes before the stub section can be handled by it too.
9182 Don't do this if we have a really large section after the
9183 stubs, as adding more stubs increases the chance that
9184 branches may not reach into the stub section. */
9185 if (!stubs_always_before_branch && !big_sec)
9186 {
9187 total = 0;
9188 while (prev != NULL
9189 && ((total += tail->output_offset - prev->output_offset)
9190 < (ppc64_elf_section_data (prev)->has_14bit_branch
9191 ? stub14_group_size : stub_group_size))
9192 && htab->stub_group[prev->id].toc_off == curr_toc)
9193 {
9194 tail = prev;
9195 prev = PREV_SEC (tail);
9196 htab->stub_group[tail->id].link_sec = curr;
9197 }
9198 }
9199 tail = prev;
9200 }
9201 }
9202 while (list-- != htab->input_list);
9203 free (htab->input_list);
9204 #undef PREV_SEC
9205 }
9206
9207 /* Determine and set the size of the stub section for a final link.
9208
9209 The basic idea here is to examine all the relocations looking for
9210 PC-relative calls to a target that is unreachable with a "bl"
9211 instruction. */
9212
9213 bfd_boolean
9214 ppc64_elf_size_stubs (bfd *output_bfd,
9215 struct bfd_link_info *info,
9216 bfd_signed_vma group_size,
9217 asection *(*add_stub_section) (const char *, asection *),
9218 void (*layout_sections_again) (void))
9219 {
9220 bfd_size_type stub_group_size;
9221 bfd_boolean stubs_always_before_branch;
9222 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9223
9224 /* Stash our params away. */
9225 htab->add_stub_section = add_stub_section;
9226 htab->layout_sections_again = layout_sections_again;
9227 stubs_always_before_branch = group_size < 0;
9228 if (group_size < 0)
9229 stub_group_size = -group_size;
9230 else
9231 stub_group_size = group_size;
9232
9233 group_sections (htab, stub_group_size, stubs_always_before_branch);
9234
9235 while (1)
9236 {
9237 bfd *input_bfd;
9238 unsigned int bfd_indx;
9239 asection *stub_sec;
9240
9241 htab->stub_iteration += 1;
9242
9243 for (input_bfd = info->input_bfds, bfd_indx = 0;
9244 input_bfd != NULL;
9245 input_bfd = input_bfd->link_next, bfd_indx++)
9246 {
9247 Elf_Internal_Shdr *symtab_hdr;
9248 asection *section;
9249 Elf_Internal_Sym *local_syms = NULL;
9250
9251 if (!is_ppc64_elf_target (input_bfd->xvec))
9252 continue;
9253
9254 /* We'll need the symbol table in a second. */
9255 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9256 if (symtab_hdr->sh_info == 0)
9257 continue;
9258
9259 /* Walk over each section attached to the input bfd. */
9260 for (section = input_bfd->sections;
9261 section != NULL;
9262 section = section->next)
9263 {
9264 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9265
9266 /* If there aren't any relocs, then there's nothing more
9267 to do. */
9268 if ((section->flags & SEC_RELOC) == 0
9269 || (section->flags & SEC_ALLOC) == 0
9270 || (section->flags & SEC_LOAD) == 0
9271 || (section->flags & SEC_CODE) == 0
9272 || section->reloc_count == 0)
9273 continue;
9274
9275 /* If this section is a link-once section that will be
9276 discarded, then don't create any stubs. */
9277 if (section->output_section == NULL
9278 || section->output_section->owner != output_bfd)
9279 continue;
9280
9281 /* Get the relocs. */
9282 internal_relocs
9283 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9284 info->keep_memory);
9285 if (internal_relocs == NULL)
9286 goto error_ret_free_local;
9287
9288 /* Now examine each relocation. */
9289 irela = internal_relocs;
9290 irelaend = irela + section->reloc_count;
9291 for (; irela < irelaend; irela++)
9292 {
9293 enum elf_ppc64_reloc_type r_type;
9294 unsigned int r_indx;
9295 enum ppc_stub_type stub_type;
9296 struct ppc_stub_hash_entry *stub_entry;
9297 asection *sym_sec, *code_sec;
9298 bfd_vma sym_value;
9299 bfd_vma destination;
9300 bfd_boolean ok_dest;
9301 struct ppc_link_hash_entry *hash;
9302 struct ppc_link_hash_entry *fdh;
9303 struct elf_link_hash_entry *h;
9304 Elf_Internal_Sym *sym;
9305 char *stub_name;
9306 const asection *id_sec;
9307 long *opd_adjust;
9308
9309 r_type = ELF64_R_TYPE (irela->r_info);
9310 r_indx = ELF64_R_SYM (irela->r_info);
9311
9312 if (r_type >= R_PPC64_max)
9313 {
9314 bfd_set_error (bfd_error_bad_value);
9315 goto error_ret_free_internal;
9316 }
9317
9318 /* Only look for stubs on branch instructions. */
9319 if (r_type != R_PPC64_REL24
9320 && r_type != R_PPC64_REL14
9321 && r_type != R_PPC64_REL14_BRTAKEN
9322 && r_type != R_PPC64_REL14_BRNTAKEN)
9323 continue;
9324
9325 /* Now determine the call target, its name, value,
9326 section. */
9327 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9328 r_indx, input_bfd))
9329 goto error_ret_free_internal;
9330 hash = (struct ppc_link_hash_entry *) h;
9331
9332 ok_dest = FALSE;
9333 fdh = NULL;
9334 sym_value = 0;
9335 if (hash == NULL)
9336 {
9337 sym_value = sym->st_value;
9338 ok_dest = TRUE;
9339 }
9340 else if (hash->elf.root.type == bfd_link_hash_defined
9341 || hash->elf.root.type == bfd_link_hash_defweak)
9342 {
9343 sym_value = hash->elf.root.u.def.value;
9344 if (sym_sec->output_section != NULL)
9345 ok_dest = TRUE;
9346 }
9347 else if (hash->elf.root.type == bfd_link_hash_undefweak
9348 || hash->elf.root.type == bfd_link_hash_undefined)
9349 {
9350 /* Recognise an old ABI func code entry sym, and
9351 use the func descriptor sym instead if it is
9352 defined. */
9353 if (hash->elf.root.root.string[0] == '.'
9354 && (fdh = get_fdh (hash, htab)) != NULL)
9355 {
9356 if (fdh->elf.root.type == bfd_link_hash_defined
9357 || fdh->elf.root.type == bfd_link_hash_defweak)
9358 {
9359 sym_sec = fdh->elf.root.u.def.section;
9360 sym_value = fdh->elf.root.u.def.value;
9361 if (sym_sec->output_section != NULL)
9362 ok_dest = TRUE;
9363 }
9364 else
9365 fdh = NULL;
9366 }
9367 }
9368 else
9369 {
9370 bfd_set_error (bfd_error_bad_value);
9371 goto error_ret_free_internal;
9372 }
9373
9374 destination = 0;
9375 if (ok_dest)
9376 {
9377 sym_value += irela->r_addend;
9378 destination = (sym_value
9379 + sym_sec->output_offset
9380 + sym_sec->output_section->vma);
9381 }
9382
9383 code_sec = sym_sec;
9384 opd_adjust = get_opd_info (sym_sec);
9385 if (opd_adjust != NULL)
9386 {
9387 bfd_vma dest;
9388
9389 if (hash == NULL)
9390 {
9391 long adjust = opd_adjust[sym_value / 8];
9392 if (adjust == -1)
9393 continue;
9394 sym_value += adjust;
9395 }
9396 dest = opd_entry_value (sym_sec, sym_value,
9397 &code_sec, &sym_value);
9398 if (dest != (bfd_vma) -1)
9399 {
9400 destination = dest;
9401 if (fdh != NULL)
9402 {
9403 /* Fixup old ABI sym to point at code
9404 entry. */
9405 hash->elf.root.type = bfd_link_hash_defweak;
9406 hash->elf.root.u.def.section = code_sec;
9407 hash->elf.root.u.def.value = sym_value;
9408 }
9409 }
9410 }
9411
9412 /* Determine what (if any) linker stub is needed. */
9413 stub_type = ppc_type_of_stub (section, irela, &hash,
9414 destination);
9415
9416 if (stub_type != ppc_stub_plt_call)
9417 {
9418 /* Check whether we need a TOC adjusting stub.
9419 Since the linker pastes together pieces from
9420 different object files when creating the
9421 _init and _fini functions, it may be that a
9422 call to what looks like a local sym is in
9423 fact a call needing a TOC adjustment. */
9424 if (code_sec != NULL
9425 && code_sec->output_section != NULL
9426 && (htab->stub_group[code_sec->id].toc_off
9427 != htab->stub_group[section->id].toc_off)
9428 && (code_sec->has_toc_reloc
9429 || code_sec->makes_toc_func_call))
9430 stub_type = ppc_stub_long_branch_r2off;
9431 }
9432
9433 if (stub_type == ppc_stub_none)
9434 continue;
9435
9436 /* __tls_get_addr calls might be eliminated. */
9437 if (stub_type != ppc_stub_plt_call
9438 && hash != NULL
9439 && (hash == htab->tls_get_addr
9440 || hash == htab->tls_get_addr_fd)
9441 && section->has_tls_reloc
9442 && irela != internal_relocs)
9443 {
9444 /* Get tls info. */
9445 char *tls_mask;
9446
9447 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9448 irela - 1, input_bfd))
9449 goto error_ret_free_internal;
9450 if (*tls_mask != 0)
9451 continue;
9452 }
9453
9454 /* Support for grouping stub sections. */
9455 id_sec = htab->stub_group[section->id].link_sec;
9456
9457 /* Get the name of this stub. */
9458 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9459 if (!stub_name)
9460 goto error_ret_free_internal;
9461
9462 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9463 stub_name, FALSE, FALSE);
9464 if (stub_entry != NULL)
9465 {
9466 /* The proper stub has already been created. */
9467 free (stub_name);
9468 continue;
9469 }
9470
9471 stub_entry = ppc_add_stub (stub_name, section, htab);
9472 if (stub_entry == NULL)
9473 {
9474 free (stub_name);
9475 error_ret_free_internal:
9476 if (elf_section_data (section)->relocs == NULL)
9477 free (internal_relocs);
9478 error_ret_free_local:
9479 if (local_syms != NULL
9480 && (symtab_hdr->contents
9481 != (unsigned char *) local_syms))
9482 free (local_syms);
9483 return FALSE;
9484 }
9485
9486 stub_entry->stub_type = stub_type;
9487 stub_entry->target_value = sym_value;
9488 stub_entry->target_section = code_sec;
9489 stub_entry->h = hash;
9490 stub_entry->addend = irela->r_addend;
9491
9492 if (stub_entry->h != NULL)
9493 htab->stub_globals += 1;
9494 }
9495
9496 /* We're done with the internal relocs, free them. */
9497 if (elf_section_data (section)->relocs != internal_relocs)
9498 free (internal_relocs);
9499 }
9500
9501 if (local_syms != NULL
9502 && symtab_hdr->contents != (unsigned char *) local_syms)
9503 {
9504 if (!info->keep_memory)
9505 free (local_syms);
9506 else
9507 symtab_hdr->contents = (unsigned char *) local_syms;
9508 }
9509 }
9510
9511 /* We may have added some stubs. Find out the new size of the
9512 stub sections. */
9513 for (stub_sec = htab->stub_bfd->sections;
9514 stub_sec != NULL;
9515 stub_sec = stub_sec->next)
9516 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9517 {
9518 stub_sec->rawsize = stub_sec->size;
9519 stub_sec->size = 0;
9520 stub_sec->reloc_count = 0;
9521 stub_sec->flags &= ~SEC_RELOC;
9522 }
9523
9524 htab->brlt->size = 0;
9525 htab->brlt->reloc_count = 0;
9526 htab->brlt->flags &= ~SEC_RELOC;
9527 if (htab->relbrlt != NULL)
9528 htab->relbrlt->size = 0;
9529
9530 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9531
9532 for (stub_sec = htab->stub_bfd->sections;
9533 stub_sec != NULL;
9534 stub_sec = stub_sec->next)
9535 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9536 && stub_sec->rawsize != stub_sec->size)
9537 break;
9538
9539 /* Exit from this loop when no stubs have been added, and no stubs
9540 have changed size. */
9541 if (stub_sec == NULL)
9542 break;
9543
9544 /* Ask the linker to do its stuff. */
9545 (*htab->layout_sections_again) ();
9546 }
9547
9548 /* It would be nice to strip htab->brlt from the output if the
9549 section is empty, but it's too late. If we strip sections here,
9550 the dynamic symbol table is corrupted since the section symbol
9551 for the stripped section isn't written. */
9552
9553 return TRUE;
9554 }
9555
9556 /* Called after we have determined section placement. If sections
9557 move, we'll be called again. Provide a value for TOCstart. */
9558
9559 bfd_vma
9560 ppc64_elf_toc (bfd *obfd)
9561 {
9562 asection *s;
9563 bfd_vma TOCstart;
9564
9565 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9566 order. The TOC starts where the first of these sections starts. */
9567 s = bfd_get_section_by_name (obfd, ".got");
9568 if (s == NULL)
9569 s = bfd_get_section_by_name (obfd, ".toc");
9570 if (s == NULL)
9571 s = bfd_get_section_by_name (obfd, ".tocbss");
9572 if (s == NULL)
9573 s = bfd_get_section_by_name (obfd, ".plt");
9574 if (s == NULL)
9575 {
9576 /* This may happen for
9577 o references to TOC base (SYM@toc / TOC[tc0]) without a
9578 .toc directive
9579 o bad linker script
9580 o --gc-sections and empty TOC sections
9581
9582 FIXME: Warn user? */
9583
9584 /* Look for a likely section. We probably won't even be
9585 using TOCstart. */
9586 for (s = obfd->sections; s != NULL; s = s->next)
9587 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9588 == (SEC_ALLOC | SEC_SMALL_DATA))
9589 break;
9590 if (s == NULL)
9591 for (s = obfd->sections; s != NULL; s = s->next)
9592 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9593 == (SEC_ALLOC | SEC_SMALL_DATA))
9594 break;
9595 if (s == NULL)
9596 for (s = obfd->sections; s != NULL; s = s->next)
9597 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9598 break;
9599 if (s == NULL)
9600 for (s = obfd->sections; s != NULL; s = s->next)
9601 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9602 break;
9603 }
9604
9605 TOCstart = 0;
9606 if (s != NULL)
9607 TOCstart = s->output_section->vma + s->output_offset;
9608
9609 return TOCstart;
9610 }
9611
9612 /* Build all the stubs associated with the current output file.
9613 The stubs are kept in a hash table attached to the main linker
9614 hash table. This function is called via gldelf64ppc_finish. */
9615
9616 bfd_boolean
9617 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9618 struct bfd_link_info *info,
9619 char **stats)
9620 {
9621 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9622 asection *stub_sec;
9623 bfd_byte *p;
9624 int stub_sec_count = 0;
9625
9626 htab->emit_stub_syms = emit_stub_syms;
9627
9628 /* Allocate memory to hold the linker stubs. */
9629 for (stub_sec = htab->stub_bfd->sections;
9630 stub_sec != NULL;
9631 stub_sec = stub_sec->next)
9632 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9633 && stub_sec->size != 0)
9634 {
9635 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9636 if (stub_sec->contents == NULL)
9637 return FALSE;
9638 /* We want to check that built size is the same as calculated
9639 size. rawsize is a convenient location to use. */
9640 stub_sec->rawsize = stub_sec->size;
9641 stub_sec->size = 0;
9642 }
9643
9644 if (htab->glink != NULL && htab->glink->size != 0)
9645 {
9646 unsigned int indx;
9647 bfd_vma plt0;
9648
9649 /* Build the .glink plt call stub. */
9650 if (htab->emit_stub_syms)
9651 {
9652 struct elf_link_hash_entry *h;
9653 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9654 if (h == NULL)
9655 return FALSE;
9656 if (h->root.type == bfd_link_hash_new)
9657 {
9658 h->root.type = bfd_link_hash_defined;
9659 h->root.u.def.section = htab->glink;
9660 h->root.u.def.value = 8;
9661 h->ref_regular = 1;
9662 h->def_regular = 1;
9663 h->ref_regular_nonweak = 1;
9664 h->forced_local = 1;
9665 h->non_elf = 0;
9666 }
9667 }
9668 p = htab->glink->contents;
9669 plt0 = (htab->plt->output_section->vma
9670 + htab->plt->output_offset
9671 - (htab->glink->output_section->vma
9672 + htab->glink->output_offset
9673 + 16));
9674 bfd_put_64 (htab->glink->owner, plt0, p);
9675 p += 8;
9676 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9677 p += 4;
9678 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9679 p += 4;
9680 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9681 p += 4;
9682 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9683 p += 4;
9684 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9685 p += 4;
9686 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9687 p += 4;
9688 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9689 p += 4;
9690 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9691 p += 4;
9692 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9693 p += 4;
9694 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9695 p += 4;
9696 bfd_put_32 (htab->glink->owner, BCTR, p);
9697 p += 4;
9698 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9699 {
9700 bfd_put_32 (htab->glink->owner, NOP, p);
9701 p += 4;
9702 }
9703
9704 /* Build the .glink lazy link call stubs. */
9705 indx = 0;
9706 while (p < htab->glink->contents + htab->glink->size)
9707 {
9708 if (indx < 0x8000)
9709 {
9710 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9711 p += 4;
9712 }
9713 else
9714 {
9715 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9716 p += 4;
9717 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9718 p += 4;
9719 }
9720 bfd_put_32 (htab->glink->owner,
9721 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9722 indx++;
9723 p += 4;
9724 }
9725 htab->glink->rawsize = p - htab->glink->contents;
9726 }
9727
9728 if (htab->brlt->size != 0)
9729 {
9730 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9731 htab->brlt->size);
9732 if (htab->brlt->contents == NULL)
9733 return FALSE;
9734 }
9735 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9736 {
9737 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9738 htab->relbrlt->size);
9739 if (htab->relbrlt->contents == NULL)
9740 return FALSE;
9741 }
9742
9743 /* Build the stubs as directed by the stub hash table. */
9744 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9745
9746 if (htab->relbrlt != NULL)
9747 htab->relbrlt->reloc_count = 0;
9748
9749 for (stub_sec = htab->stub_bfd->sections;
9750 stub_sec != NULL;
9751 stub_sec = stub_sec->next)
9752 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9753 {
9754 stub_sec_count += 1;
9755 if (stub_sec->rawsize != stub_sec->size)
9756 break;
9757 }
9758
9759 if (stub_sec != NULL
9760 || htab->glink->rawsize != htab->glink->size)
9761 {
9762 htab->stub_error = TRUE;
9763 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9764 }
9765
9766 if (htab->stub_error)
9767 return FALSE;
9768
9769 if (stats != NULL)
9770 {
9771 *stats = bfd_malloc (500);
9772 if (*stats == NULL)
9773 return FALSE;
9774
9775 sprintf (*stats, _("linker stubs in %u group%s\n"
9776 " branch %lu\n"
9777 " toc adjust %lu\n"
9778 " long branch %lu\n"
9779 " long toc adj %lu\n"
9780 " plt call %lu"),
9781 stub_sec_count,
9782 stub_sec_count == 1 ? "" : "s",
9783 htab->stub_count[ppc_stub_long_branch - 1],
9784 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9785 htab->stub_count[ppc_stub_plt_branch - 1],
9786 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9787 htab->stub_count[ppc_stub_plt_call - 1]);
9788 }
9789 return TRUE;
9790 }
9791
9792 /* This function undoes the changes made by add_symbol_adjust. */
9793
9794 static bfd_boolean
9795 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9796 {
9797 struct ppc_link_hash_entry *eh;
9798
9799 if (h->root.type == bfd_link_hash_indirect)
9800 return TRUE;
9801
9802 if (h->root.type == bfd_link_hash_warning)
9803 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9804
9805 eh = (struct ppc_link_hash_entry *) h;
9806 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9807 return TRUE;
9808
9809 eh->elf.root.type = bfd_link_hash_undefined;
9810 return TRUE;
9811 }
9812
9813 void
9814 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9815 {
9816 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9817 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9818 }
9819
9820 /* What to do when ld finds relocations against symbols defined in
9821 discarded sections. */
9822
9823 static unsigned int
9824 ppc64_elf_action_discarded (asection *sec)
9825 {
9826 if (strcmp (".opd", sec->name) == 0)
9827 return 0;
9828
9829 if (strcmp (".toc", sec->name) == 0)
9830 return 0;
9831
9832 if (strcmp (".toc1", sec->name) == 0)
9833 return 0;
9834
9835 return _bfd_elf_default_action_discarded (sec);
9836 }
9837
9838 /* The RELOCATE_SECTION function is called by the ELF backend linker
9839 to handle the relocations for a section.
9840
9841 The relocs are always passed as Rela structures; if the section
9842 actually uses Rel structures, the r_addend field will always be
9843 zero.
9844
9845 This function is responsible for adjust the section contents as
9846 necessary, and (if using Rela relocs and generating a
9847 relocatable output file) adjusting the reloc addend as
9848 necessary.
9849
9850 This function does not have to worry about setting the reloc
9851 address or the reloc symbol index.
9852
9853 LOCAL_SYMS is a pointer to the swapped in local symbols.
9854
9855 LOCAL_SECTIONS is an array giving the section in the input file
9856 corresponding to the st_shndx field of each local symbol.
9857
9858 The global hash table entry for the global symbols can be found
9859 via elf_sym_hashes (input_bfd).
9860
9861 When generating relocatable output, this function must handle
9862 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9863 going to be the section symbol corresponding to the output
9864 section, which means that the addend must be adjusted
9865 accordingly. */
9866
9867 static bfd_boolean
9868 ppc64_elf_relocate_section (bfd *output_bfd,
9869 struct bfd_link_info *info,
9870 bfd *input_bfd,
9871 asection *input_section,
9872 bfd_byte *contents,
9873 Elf_Internal_Rela *relocs,
9874 Elf_Internal_Sym *local_syms,
9875 asection **local_sections)
9876 {
9877 struct ppc_link_hash_table *htab;
9878 Elf_Internal_Shdr *symtab_hdr;
9879 struct elf_link_hash_entry **sym_hashes;
9880 Elf_Internal_Rela *rel;
9881 Elf_Internal_Rela *relend;
9882 Elf_Internal_Rela outrel;
9883 bfd_byte *loc;
9884 struct got_entry **local_got_ents;
9885 bfd_vma TOCstart;
9886 bfd_boolean ret = TRUE;
9887 bfd_boolean is_opd;
9888 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9889 bfd_boolean is_power4 = FALSE;
9890 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
9891
9892 /* Initialize howto table if needed. */
9893 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9894 ppc_howto_init ();
9895
9896 htab = ppc_hash_table (info);
9897
9898 /* Don't relocate stub sections. */
9899 if (input_section->owner == htab->stub_bfd)
9900 return TRUE;
9901
9902 local_got_ents = elf_local_got_ents (input_bfd);
9903 TOCstart = elf_gp (output_bfd);
9904 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9905 sym_hashes = elf_sym_hashes (input_bfd);
9906 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
9907
9908 rel = relocs;
9909 relend = relocs + input_section->reloc_count;
9910 for (; rel < relend; rel++)
9911 {
9912 enum elf_ppc64_reloc_type r_type;
9913 bfd_vma addend, orig_addend;
9914 bfd_reloc_status_type r;
9915 Elf_Internal_Sym *sym;
9916 asection *sec;
9917 struct elf_link_hash_entry *h_elf;
9918 struct ppc_link_hash_entry *h;
9919 struct ppc_link_hash_entry *fdh;
9920 const char *sym_name;
9921 unsigned long r_symndx, toc_symndx;
9922 char tls_mask, tls_gd, tls_type;
9923 char sym_type;
9924 bfd_vma relocation;
9925 bfd_boolean unresolved_reloc;
9926 bfd_boolean warned;
9927 unsigned long insn, mask;
9928 struct ppc_stub_hash_entry *stub_entry;
9929 bfd_vma max_br_offset;
9930 bfd_vma from;
9931
9932 r_type = ELF64_R_TYPE (rel->r_info);
9933 r_symndx = ELF64_R_SYM (rel->r_info);
9934
9935 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9936 symbol of the previous ADDR64 reloc. The symbol gives us the
9937 proper TOC base to use. */
9938 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9939 && rel != relocs
9940 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9941 && is_opd)
9942 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9943
9944 sym = NULL;
9945 sec = NULL;
9946 h_elf = NULL;
9947 sym_name = NULL;
9948 unresolved_reloc = FALSE;
9949 warned = FALSE;
9950 orig_addend = rel->r_addend;
9951
9952 if (r_symndx < symtab_hdr->sh_info)
9953 {
9954 /* It's a local symbol. */
9955 long *opd_adjust;
9956
9957 sym = local_syms + r_symndx;
9958 sec = local_sections[r_symndx];
9959 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9960 sym_type = ELF64_ST_TYPE (sym->st_info);
9961 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9962 opd_adjust = get_opd_info (sec);
9963 if (opd_adjust != NULL)
9964 {
9965 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9966 if (adjust == -1)
9967 relocation = 0;
9968 else
9969 {
9970 /* If this is a relocation against the opd section sym
9971 and we have edited .opd, adjust the reloc addend so
9972 that ld -r and ld --emit-relocs output is correct.
9973 If it is a reloc against some other .opd symbol,
9974 then the symbol value will be adjusted later. */
9975 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9976 rel->r_addend += adjust;
9977 else
9978 relocation += adjust;
9979 }
9980 }
9981 }
9982 else
9983 {
9984 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9985 r_symndx, symtab_hdr, sym_hashes,
9986 h_elf, sec, relocation,
9987 unresolved_reloc, warned);
9988 sym_name = h_elf->root.root.string;
9989 sym_type = h_elf->type;
9990 }
9991 h = (struct ppc_link_hash_entry *) h_elf;
9992
9993 if (sec != NULL && elf_discarded_section (sec))
9994 {
9995 /* For relocs against symbols from removed linkonce sections,
9996 or sections discarded by a linker script, we just want the
9997 section contents zeroed. Avoid any special processing. */
9998 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
9999 contents + rel->r_offset);
10000 rel->r_info = 0;
10001 rel->r_addend = 0;
10002 continue;
10003 }
10004
10005 if (info->relocatable)
10006 continue;
10007
10008 /* TLS optimizations. Replace instruction sequences and relocs
10009 based on information we collected in tls_optimize. We edit
10010 RELOCS so that --emit-relocs will output something sensible
10011 for the final instruction stream. */
10012 tls_mask = 0;
10013 tls_gd = 0;
10014 toc_symndx = 0;
10015 if (IS_PPC64_TLS_RELOC (r_type))
10016 {
10017 if (h != NULL)
10018 tls_mask = h->tls_mask;
10019 else if (local_got_ents != NULL)
10020 {
10021 char *lgot_masks;
10022 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10023 tls_mask = lgot_masks[r_symndx];
10024 }
10025 if (tls_mask == 0 && r_type == R_PPC64_TLS)
10026 {
10027 /* Check for toc tls entries. */
10028 char *toc_tls;
10029
10030 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10031 rel, input_bfd))
10032 return FALSE;
10033
10034 if (toc_tls)
10035 tls_mask = *toc_tls;
10036 }
10037 }
10038
10039 /* Check that tls relocs are used with tls syms, and non-tls
10040 relocs are used with non-tls syms. */
10041 if (r_symndx != 0
10042 && r_type != R_PPC64_NONE
10043 && (h == NULL
10044 || h->elf.root.type == bfd_link_hash_defined
10045 || h->elf.root.type == bfd_link_hash_defweak)
10046 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
10047 {
10048 if (r_type == R_PPC64_TLS && tls_mask != 0)
10049 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10050 ;
10051 else
10052 (*_bfd_error_handler)
10053 (sym_type == STT_TLS
10054 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10055 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10056 input_bfd,
10057 input_section,
10058 (long) rel->r_offset,
10059 ppc64_elf_howto_table[r_type]->name,
10060 sym_name);
10061 }
10062
10063 /* Ensure reloc mapping code below stays sane. */
10064 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10065 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10066 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10067 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10068 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10069 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10070 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10071 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10072 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10073 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10074 abort ();
10075
10076 switch (r_type)
10077 {
10078 default:
10079 break;
10080
10081 case R_PPC64_TOC16:
10082 case R_PPC64_TOC16_LO:
10083 case R_PPC64_TOC16_DS:
10084 case R_PPC64_TOC16_LO_DS:
10085 {
10086 /* Check for toc tls entries. */
10087 char *toc_tls;
10088 int retval;
10089
10090 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10091 rel, input_bfd);
10092 if (retval == 0)
10093 return FALSE;
10094
10095 if (toc_tls)
10096 {
10097 tls_mask = *toc_tls;
10098 if (r_type == R_PPC64_TOC16_DS
10099 || r_type == R_PPC64_TOC16_LO_DS)
10100 {
10101 if (tls_mask != 0
10102 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10103 goto toctprel;
10104 }
10105 else
10106 {
10107 /* If we found a GD reloc pair, then we might be
10108 doing a GD->IE transition. */
10109 if (retval == 2)
10110 {
10111 tls_gd = TLS_TPRELGD;
10112 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10113 goto tls_get_addr_check;
10114 }
10115 else if (retval == 3)
10116 {
10117 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10118 goto tls_get_addr_check;
10119 }
10120 }
10121 }
10122 }
10123 break;
10124
10125 case R_PPC64_GOT_TPREL16_DS:
10126 case R_PPC64_GOT_TPREL16_LO_DS:
10127 if (tls_mask != 0
10128 && (tls_mask & TLS_TPREL) == 0)
10129 {
10130 toctprel:
10131 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10132 insn &= 31 << 21;
10133 insn |= 0x3c0d0000; /* addis 0,13,0 */
10134 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10135 r_type = R_PPC64_TPREL16_HA;
10136 if (toc_symndx != 0)
10137 {
10138 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10139 /* We changed the symbol. Start over in order to
10140 get h, sym, sec etc. right. */
10141 rel--;
10142 continue;
10143 }
10144 else
10145 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10146 }
10147 break;
10148
10149 case R_PPC64_TLS:
10150 if (tls_mask != 0
10151 && (tls_mask & TLS_TPREL) == 0)
10152 {
10153 bfd_vma rtra;
10154 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10155 if ((insn & ((0x3f << 26) | (31 << 11)))
10156 == ((31 << 26) | (13 << 11)))
10157 rtra = insn & ((1 << 26) - (1 << 16));
10158 else if ((insn & ((0x3f << 26) | (31 << 16)))
10159 == ((31 << 26) | (13 << 16)))
10160 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10161 else
10162 abort ();
10163 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10164 /* add -> addi. */
10165 insn = 14 << 26;
10166 else if ((insn & (31 << 1)) == 23 << 1
10167 && ((insn & (31 << 6)) < 14 << 6
10168 || ((insn & (31 << 6)) >= 16 << 6
10169 && (insn & (31 << 6)) < 24 << 6)))
10170 /* load and store indexed -> dform. */
10171 insn = (32 | ((insn >> 6) & 31)) << 26;
10172 else if ((insn & (31 << 1)) == 21 << 1
10173 && (insn & (0x1a << 6)) == 0)
10174 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10175 insn = (((58 | ((insn >> 6) & 4)) << 26)
10176 | ((insn >> 6) & 1));
10177 else if ((insn & (31 << 1)) == 21 << 1
10178 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10179 /* lwax -> lwa. */
10180 insn = (58 << 26) | 2;
10181 else
10182 abort ();
10183 insn |= rtra;
10184 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10185 /* Was PPC64_TLS which sits on insn boundary, now
10186 PPC64_TPREL16_LO which is at low-order half-word. */
10187 rel->r_offset += d_offset;
10188 r_type = R_PPC64_TPREL16_LO;
10189 if (toc_symndx != 0)
10190 {
10191 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10192 /* We changed the symbol. Start over in order to
10193 get h, sym, sec etc. right. */
10194 rel--;
10195 continue;
10196 }
10197 else
10198 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10199 }
10200 break;
10201
10202 case R_PPC64_GOT_TLSGD16_HI:
10203 case R_PPC64_GOT_TLSGD16_HA:
10204 tls_gd = TLS_TPRELGD;
10205 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10206 goto tls_gdld_hi;
10207 break;
10208
10209 case R_PPC64_GOT_TLSLD16_HI:
10210 case R_PPC64_GOT_TLSLD16_HA:
10211 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10212 {
10213 tls_gdld_hi:
10214 if ((tls_mask & tls_gd) != 0)
10215 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10216 + R_PPC64_GOT_TPREL16_DS);
10217 else
10218 {
10219 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10220 rel->r_offset -= d_offset;
10221 r_type = R_PPC64_NONE;
10222 }
10223 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10224 }
10225 break;
10226
10227 case R_PPC64_GOT_TLSGD16:
10228 case R_PPC64_GOT_TLSGD16_LO:
10229 tls_gd = TLS_TPRELGD;
10230 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10231 goto tls_get_addr_check;
10232 break;
10233
10234 case R_PPC64_GOT_TLSLD16:
10235 case R_PPC64_GOT_TLSLD16_LO:
10236 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10237 {
10238 tls_get_addr_check:
10239 if (rel + 1 < relend)
10240 {
10241 enum elf_ppc64_reloc_type r_type2;
10242 unsigned long r_symndx2;
10243 struct elf_link_hash_entry *h2;
10244 bfd_vma insn1, insn2, insn3;
10245 bfd_vma offset;
10246
10247 /* The next instruction should be a call to
10248 __tls_get_addr. Peek at the reloc to be sure. */
10249 r_type2 = ELF64_R_TYPE (rel[1].r_info);
10250 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
10251 if (r_symndx2 < symtab_hdr->sh_info
10252 || (r_type2 != R_PPC64_REL14
10253 && r_type2 != R_PPC64_REL14_BRTAKEN
10254 && r_type2 != R_PPC64_REL14_BRNTAKEN
10255 && r_type2 != R_PPC64_REL24))
10256 break;
10257
10258 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
10259 while (h2->root.type == bfd_link_hash_indirect
10260 || h2->root.type == bfd_link_hash_warning)
10261 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
10262 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
10263 && h2 != &htab->tls_get_addr_fd->elf))
10264 break;
10265
10266 /* OK, it checks out. Replace the call. */
10267 offset = rel[1].r_offset;
10268 insn1 = bfd_get_32 (output_bfd,
10269 contents + rel->r_offset - d_offset);
10270 insn3 = bfd_get_32 (output_bfd,
10271 contents + offset + 4);
10272 if ((tls_mask & tls_gd) != 0)
10273 {
10274 /* IE */
10275 insn1 &= (1 << 26) - (1 << 2);
10276 insn1 |= 58 << 26; /* ld */
10277 insn2 = 0x7c636a14; /* add 3,3,13 */
10278 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
10279 if ((tls_mask & TLS_EXPLICIT) == 0)
10280 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10281 + R_PPC64_GOT_TPREL16_DS);
10282 else
10283 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10284 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10285 }
10286 else
10287 {
10288 /* LE */
10289 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10290 insn2 = 0x38630000; /* addi 3,3,0 */
10291 if (tls_gd == 0)
10292 {
10293 /* Was an LD reloc. */
10294 r_symndx = 0;
10295 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10296 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10297 }
10298 else if (toc_symndx != 0)
10299 r_symndx = toc_symndx;
10300 r_type = R_PPC64_TPREL16_HA;
10301 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10302 rel[1].r_info = ELF64_R_INFO (r_symndx,
10303 R_PPC64_TPREL16_LO);
10304 rel[1].r_offset += d_offset;
10305 }
10306 if (insn3 == NOP
10307 || insn3 == CROR_151515 || insn3 == CROR_313131)
10308 {
10309 insn3 = insn2;
10310 insn2 = NOP;
10311 rel[1].r_offset += 4;
10312 }
10313 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
10314 bfd_put_32 (output_bfd, insn2, contents + offset);
10315 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10316 if (tls_gd == 0 || toc_symndx != 0)
10317 {
10318 /* We changed the symbol. Start over in order
10319 to get h, sym, sec etc. right. */
10320 rel--;
10321 continue;
10322 }
10323 }
10324 }
10325 break;
10326
10327 case R_PPC64_DTPMOD64:
10328 if (rel + 1 < relend
10329 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10330 && rel[1].r_offset == rel->r_offset + 8)
10331 {
10332 if ((tls_mask & TLS_GD) == 0)
10333 {
10334 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10335 if ((tls_mask & TLS_TPRELGD) != 0)
10336 r_type = R_PPC64_TPREL64;
10337 else
10338 {
10339 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10340 r_type = R_PPC64_NONE;
10341 }
10342 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10343 }
10344 }
10345 else
10346 {
10347 if ((tls_mask & TLS_LD) == 0)
10348 {
10349 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10350 r_type = R_PPC64_NONE;
10351 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10352 }
10353 }
10354 break;
10355
10356 case R_PPC64_TPREL64:
10357 if ((tls_mask & TLS_TPREL) == 0)
10358 {
10359 r_type = R_PPC64_NONE;
10360 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10361 }
10362 break;
10363 }
10364
10365 /* Handle other relocations that tweak non-addend part of insn. */
10366 insn = 0;
10367 max_br_offset = 1 << 25;
10368 addend = rel->r_addend;
10369 switch (r_type)
10370 {
10371 default:
10372 break;
10373
10374 /* Branch taken prediction relocations. */
10375 case R_PPC64_ADDR14_BRTAKEN:
10376 case R_PPC64_REL14_BRTAKEN:
10377 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10378 /* Fall thru. */
10379
10380 /* Branch not taken prediction relocations. */
10381 case R_PPC64_ADDR14_BRNTAKEN:
10382 case R_PPC64_REL14_BRNTAKEN:
10383 insn |= bfd_get_32 (output_bfd,
10384 contents + rel->r_offset) & ~(0x01 << 21);
10385 /* Fall thru. */
10386
10387 case R_PPC64_REL14:
10388 max_br_offset = 1 << 15;
10389 /* Fall thru. */
10390
10391 case R_PPC64_REL24:
10392 /* Calls to functions with a different TOC, such as calls to
10393 shared objects, need to alter the TOC pointer. This is
10394 done using a linkage stub. A REL24 branching to these
10395 linkage stubs needs to be followed by a nop, as the nop
10396 will be replaced with an instruction to restore the TOC
10397 base pointer. */
10398 stub_entry = NULL;
10399 fdh = h;
10400 if (((h != NULL
10401 && (((fdh = h->oh) != NULL
10402 && fdh->elf.plt.plist != NULL)
10403 || (fdh = h)->elf.plt.plist != NULL))
10404 || (sec != NULL
10405 && sec->output_section != NULL
10406 && sec->id <= htab->top_id
10407 && (htab->stub_group[sec->id].toc_off
10408 != htab->stub_group[input_section->id].toc_off)))
10409 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10410 rel, htab)) != NULL
10411 && (stub_entry->stub_type == ppc_stub_plt_call
10412 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10413 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10414 {
10415 bfd_boolean can_plt_call = FALSE;
10416
10417 if (rel->r_offset + 8 <= input_section->size)
10418 {
10419 unsigned long nop;
10420 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10421 if (nop == NOP
10422 || nop == CROR_151515 || nop == CROR_313131)
10423 {
10424 bfd_put_32 (input_bfd, LD_R2_40R1,
10425 contents + rel->r_offset + 4);
10426 can_plt_call = TRUE;
10427 }
10428 }
10429
10430 if (!can_plt_call)
10431 {
10432 if (stub_entry->stub_type == ppc_stub_plt_call)
10433 {
10434 /* If this is a plain branch rather than a branch
10435 and link, don't require a nop. However, don't
10436 allow tail calls in a shared library as they
10437 will result in r2 being corrupted. */
10438 unsigned long br;
10439 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10440 if (info->executable && (br & 1) == 0)
10441 can_plt_call = TRUE;
10442 else
10443 stub_entry = NULL;
10444 }
10445 else if (h != NULL
10446 && strcmp (h->elf.root.root.string,
10447 ".__libc_start_main") == 0)
10448 {
10449 /* Allow crt1 branch to go via a toc adjusting stub. */
10450 can_plt_call = TRUE;
10451 }
10452 else
10453 {
10454 if (strcmp (input_section->output_section->name,
10455 ".init") == 0
10456 || strcmp (input_section->output_section->name,
10457 ".fini") == 0)
10458 (*_bfd_error_handler)
10459 (_("%B(%A+0x%lx): automatic multiple TOCs "
10460 "not supported using your crt files; "
10461 "recompile with -mminimal-toc or upgrade gcc"),
10462 input_bfd,
10463 input_section,
10464 (long) rel->r_offset);
10465 else
10466 (*_bfd_error_handler)
10467 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10468 "does not allow automatic multiple TOCs; "
10469 "recompile with -mminimal-toc or "
10470 "-fno-optimize-sibling-calls, "
10471 "or make `%s' extern"),
10472 input_bfd,
10473 input_section,
10474 (long) rel->r_offset,
10475 sym_name,
10476 sym_name);
10477 bfd_set_error (bfd_error_bad_value);
10478 ret = FALSE;
10479 }
10480 }
10481
10482 if (can_plt_call
10483 && stub_entry->stub_type == ppc_stub_plt_call)
10484 unresolved_reloc = FALSE;
10485 }
10486
10487 if (stub_entry == NULL
10488 && get_opd_info (sec) != NULL)
10489 {
10490 /* The branch destination is the value of the opd entry. */
10491 bfd_vma off = (relocation + addend
10492 - sec->output_section->vma
10493 - sec->output_offset);
10494 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10495 if (dest != (bfd_vma) -1)
10496 {
10497 relocation = dest;
10498 addend = 0;
10499 }
10500 }
10501
10502 /* If the branch is out of reach we ought to have a long
10503 branch stub. */
10504 from = (rel->r_offset
10505 + input_section->output_offset
10506 + input_section->output_section->vma);
10507
10508 if (stub_entry == NULL
10509 && (relocation + addend - from + max_br_offset
10510 >= 2 * max_br_offset)
10511 && r_type != R_PPC64_ADDR14_BRTAKEN
10512 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10513 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10514 htab);
10515
10516 if (stub_entry != NULL)
10517 {
10518 /* Munge up the value and addend so that we call the stub
10519 rather than the procedure directly. */
10520 relocation = (stub_entry->stub_offset
10521 + stub_entry->stub_sec->output_offset
10522 + stub_entry->stub_sec->output_section->vma);
10523 addend = 0;
10524 }
10525
10526 if (insn != 0)
10527 {
10528 if (is_power4)
10529 {
10530 /* Set 'a' bit. This is 0b00010 in BO field for branch
10531 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10532 for branch on CTR insns (BO == 1a00t or 1a01t). */
10533 if ((insn & (0x14 << 21)) == (0x04 << 21))
10534 insn |= 0x02 << 21;
10535 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10536 insn |= 0x08 << 21;
10537 else
10538 break;
10539 }
10540 else
10541 {
10542 /* Invert 'y' bit if not the default. */
10543 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10544 insn ^= 0x01 << 21;
10545 }
10546
10547 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10548 }
10549
10550 /* NOP out calls to undefined weak functions.
10551 We can thus call a weak function without first
10552 checking whether the function is defined. */
10553 else if (h != NULL
10554 && h->elf.root.type == bfd_link_hash_undefweak
10555 && r_type == R_PPC64_REL24
10556 && relocation == 0
10557 && addend == 0)
10558 {
10559 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10560 continue;
10561 }
10562 break;
10563 }
10564
10565 /* Set `addend'. */
10566 tls_type = 0;
10567 switch (r_type)
10568 {
10569 default:
10570 (*_bfd_error_handler)
10571 (_("%B: unknown relocation type %d for symbol %s"),
10572 input_bfd, (int) r_type, sym_name);
10573
10574 bfd_set_error (bfd_error_bad_value);
10575 ret = FALSE;
10576 continue;
10577
10578 case R_PPC64_NONE:
10579 case R_PPC64_TLS:
10580 case R_PPC64_GNU_VTINHERIT:
10581 case R_PPC64_GNU_VTENTRY:
10582 continue;
10583
10584 /* GOT16 relocations. Like an ADDR16 using the symbol's
10585 address in the GOT as relocation value instead of the
10586 symbol's value itself. Also, create a GOT entry for the
10587 symbol and put the symbol value there. */
10588 case R_PPC64_GOT_TLSGD16:
10589 case R_PPC64_GOT_TLSGD16_LO:
10590 case R_PPC64_GOT_TLSGD16_HI:
10591 case R_PPC64_GOT_TLSGD16_HA:
10592 tls_type = TLS_TLS | TLS_GD;
10593 goto dogot;
10594
10595 case R_PPC64_GOT_TLSLD16:
10596 case R_PPC64_GOT_TLSLD16_LO:
10597 case R_PPC64_GOT_TLSLD16_HI:
10598 case R_PPC64_GOT_TLSLD16_HA:
10599 tls_type = TLS_TLS | TLS_LD;
10600 goto dogot;
10601
10602 case R_PPC64_GOT_TPREL16_DS:
10603 case R_PPC64_GOT_TPREL16_LO_DS:
10604 case R_PPC64_GOT_TPREL16_HI:
10605 case R_PPC64_GOT_TPREL16_HA:
10606 tls_type = TLS_TLS | TLS_TPREL;
10607 goto dogot;
10608
10609 case R_PPC64_GOT_DTPREL16_DS:
10610 case R_PPC64_GOT_DTPREL16_LO_DS:
10611 case R_PPC64_GOT_DTPREL16_HI:
10612 case R_PPC64_GOT_DTPREL16_HA:
10613 tls_type = TLS_TLS | TLS_DTPREL;
10614 goto dogot;
10615
10616 case R_PPC64_GOT16:
10617 case R_PPC64_GOT16_LO:
10618 case R_PPC64_GOT16_HI:
10619 case R_PPC64_GOT16_HA:
10620 case R_PPC64_GOT16_DS:
10621 case R_PPC64_GOT16_LO_DS:
10622 dogot:
10623 {
10624 /* Relocation is to the entry for this symbol in the global
10625 offset table. */
10626 asection *got;
10627 bfd_vma *offp;
10628 bfd_vma off;
10629 unsigned long indx = 0;
10630
10631 if (tls_type == (TLS_TLS | TLS_LD)
10632 && (h == NULL
10633 || !h->elf.def_dynamic))
10634 offp = &ppc64_tlsld_got (input_bfd)->offset;
10635 else
10636 {
10637 struct got_entry *ent;
10638
10639 if (h != NULL)
10640 {
10641 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10642 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10643 &h->elf)
10644 || (info->shared
10645 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10646 /* This is actually a static link, or it is a
10647 -Bsymbolic link and the symbol is defined
10648 locally, or the symbol was forced to be local
10649 because of a version file. */
10650 ;
10651 else
10652 {
10653 indx = h->elf.dynindx;
10654 unresolved_reloc = FALSE;
10655 }
10656 ent = h->elf.got.glist;
10657 }
10658 else
10659 {
10660 if (local_got_ents == NULL)
10661 abort ();
10662 ent = local_got_ents[r_symndx];
10663 }
10664
10665 for (; ent != NULL; ent = ent->next)
10666 if (ent->addend == orig_addend
10667 && ent->owner == input_bfd
10668 && ent->tls_type == tls_type)
10669 break;
10670 if (ent == NULL)
10671 abort ();
10672 offp = &ent->got.offset;
10673 }
10674
10675 got = ppc64_elf_tdata (input_bfd)->got;
10676 if (got == NULL)
10677 abort ();
10678
10679 /* The offset must always be a multiple of 8. We use the
10680 least significant bit to record whether we have already
10681 processed this entry. */
10682 off = *offp;
10683 if ((off & 1) != 0)
10684 off &= ~1;
10685 else
10686 {
10687 /* Generate relocs for the dynamic linker, except in
10688 the case of TLSLD where we'll use one entry per
10689 module. */
10690 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10691
10692 *offp = off | 1;
10693 if ((info->shared || indx != 0)
10694 && (h == NULL
10695 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10696 || h->elf.root.type != bfd_link_hash_undefweak))
10697 {
10698 outrel.r_offset = (got->output_section->vma
10699 + got->output_offset
10700 + off);
10701 outrel.r_addend = addend;
10702 if (tls_type & (TLS_LD | TLS_GD))
10703 {
10704 outrel.r_addend = 0;
10705 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10706 if (tls_type == (TLS_TLS | TLS_GD))
10707 {
10708 loc = relgot->contents;
10709 loc += (relgot->reloc_count++
10710 * sizeof (Elf64_External_Rela));
10711 bfd_elf64_swap_reloca_out (output_bfd,
10712 &outrel, loc);
10713 outrel.r_offset += 8;
10714 outrel.r_addend = addend;
10715 outrel.r_info
10716 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10717 }
10718 }
10719 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10720 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10721 else if (tls_type == (TLS_TLS | TLS_TPREL))
10722 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10723 else if (indx == 0)
10724 {
10725 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10726
10727 /* Write the .got section contents for the sake
10728 of prelink. */
10729 loc = got->contents + off;
10730 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10731 loc);
10732 }
10733 else
10734 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10735
10736 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10737 {
10738 outrel.r_addend += relocation;
10739 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10740 outrel.r_addend -= htab->elf.tls_sec->vma;
10741 }
10742 loc = relgot->contents;
10743 loc += (relgot->reloc_count++
10744 * sizeof (Elf64_External_Rela));
10745 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10746 }
10747
10748 /* Init the .got section contents here if we're not
10749 emitting a reloc. */
10750 else
10751 {
10752 relocation += addend;
10753 if (tls_type == (TLS_TLS | TLS_LD))
10754 relocation = 1;
10755 else if (tls_type != 0)
10756 {
10757 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10758 if (tls_type == (TLS_TLS | TLS_TPREL))
10759 relocation += DTP_OFFSET - TP_OFFSET;
10760
10761 if (tls_type == (TLS_TLS | TLS_GD))
10762 {
10763 bfd_put_64 (output_bfd, relocation,
10764 got->contents + off + 8);
10765 relocation = 1;
10766 }
10767 }
10768
10769 bfd_put_64 (output_bfd, relocation,
10770 got->contents + off);
10771 }
10772 }
10773
10774 if (off >= (bfd_vma) -2)
10775 abort ();
10776
10777 relocation = got->output_offset + off;
10778
10779 /* TOC base (r2) is TOC start plus 0x8000. */
10780 addend = -TOC_BASE_OFF;
10781 }
10782 break;
10783
10784 case R_PPC64_PLT16_HA:
10785 case R_PPC64_PLT16_HI:
10786 case R_PPC64_PLT16_LO:
10787 case R_PPC64_PLT32:
10788 case R_PPC64_PLT64:
10789 /* Relocation is to the entry for this symbol in the
10790 procedure linkage table. */
10791
10792 /* Resolve a PLT reloc against a local symbol directly,
10793 without using the procedure linkage table. */
10794 if (h == NULL)
10795 break;
10796
10797 /* It's possible that we didn't make a PLT entry for this
10798 symbol. This happens when statically linking PIC code,
10799 or when using -Bsymbolic. Go find a match if there is a
10800 PLT entry. */
10801 if (htab->plt != NULL)
10802 {
10803 struct plt_entry *ent;
10804 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10805 if (ent->addend == orig_addend
10806 && ent->plt.offset != (bfd_vma) -1)
10807 {
10808 relocation = (htab->plt->output_section->vma
10809 + htab->plt->output_offset
10810 + ent->plt.offset);
10811 unresolved_reloc = FALSE;
10812 }
10813 }
10814 break;
10815
10816 case R_PPC64_TOC:
10817 /* Relocation value is TOC base. */
10818 relocation = TOCstart;
10819 if (r_symndx == 0)
10820 relocation += htab->stub_group[input_section->id].toc_off;
10821 else if (unresolved_reloc)
10822 ;
10823 else if (sec != NULL && sec->id <= htab->top_id)
10824 relocation += htab->stub_group[sec->id].toc_off;
10825 else
10826 unresolved_reloc = TRUE;
10827 goto dodyn;
10828
10829 /* TOC16 relocs. We want the offset relative to the TOC base,
10830 which is the address of the start of the TOC plus 0x8000.
10831 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10832 in this order. */
10833 case R_PPC64_TOC16:
10834 case R_PPC64_TOC16_LO:
10835 case R_PPC64_TOC16_HI:
10836 case R_PPC64_TOC16_DS:
10837 case R_PPC64_TOC16_LO_DS:
10838 case R_PPC64_TOC16_HA:
10839 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10840 break;
10841
10842 /* Relocate against the beginning of the section. */
10843 case R_PPC64_SECTOFF:
10844 case R_PPC64_SECTOFF_LO:
10845 case R_PPC64_SECTOFF_HI:
10846 case R_PPC64_SECTOFF_DS:
10847 case R_PPC64_SECTOFF_LO_DS:
10848 case R_PPC64_SECTOFF_HA:
10849 if (sec != NULL)
10850 addend -= sec->output_section->vma;
10851 break;
10852
10853 case R_PPC64_REL14:
10854 case R_PPC64_REL14_BRNTAKEN:
10855 case R_PPC64_REL14_BRTAKEN:
10856 case R_PPC64_REL24:
10857 break;
10858
10859 case R_PPC64_TPREL16:
10860 case R_PPC64_TPREL16_LO:
10861 case R_PPC64_TPREL16_HI:
10862 case R_PPC64_TPREL16_HA:
10863 case R_PPC64_TPREL16_DS:
10864 case R_PPC64_TPREL16_LO_DS:
10865 case R_PPC64_TPREL16_HIGHER:
10866 case R_PPC64_TPREL16_HIGHERA:
10867 case R_PPC64_TPREL16_HIGHEST:
10868 case R_PPC64_TPREL16_HIGHESTA:
10869 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10870 if (info->shared)
10871 /* The TPREL16 relocs shouldn't really be used in shared
10872 libs as they will result in DT_TEXTREL being set, but
10873 support them anyway. */
10874 goto dodyn;
10875 break;
10876
10877 case R_PPC64_DTPREL16:
10878 case R_PPC64_DTPREL16_LO:
10879 case R_PPC64_DTPREL16_HI:
10880 case R_PPC64_DTPREL16_HA:
10881 case R_PPC64_DTPREL16_DS:
10882 case R_PPC64_DTPREL16_LO_DS:
10883 case R_PPC64_DTPREL16_HIGHER:
10884 case R_PPC64_DTPREL16_HIGHERA:
10885 case R_PPC64_DTPREL16_HIGHEST:
10886 case R_PPC64_DTPREL16_HIGHESTA:
10887 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10888 break;
10889
10890 case R_PPC64_DTPMOD64:
10891 relocation = 1;
10892 addend = 0;
10893 goto dodyn;
10894
10895 case R_PPC64_TPREL64:
10896 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10897 goto dodyn;
10898
10899 case R_PPC64_DTPREL64:
10900 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10901 /* Fall thru */
10902
10903 /* Relocations that may need to be propagated if this is a
10904 dynamic object. */
10905 case R_PPC64_REL30:
10906 case R_PPC64_REL32:
10907 case R_PPC64_REL64:
10908 case R_PPC64_ADDR14:
10909 case R_PPC64_ADDR14_BRNTAKEN:
10910 case R_PPC64_ADDR14_BRTAKEN:
10911 case R_PPC64_ADDR16:
10912 case R_PPC64_ADDR16_DS:
10913 case R_PPC64_ADDR16_HA:
10914 case R_PPC64_ADDR16_HI:
10915 case R_PPC64_ADDR16_HIGHER:
10916 case R_PPC64_ADDR16_HIGHERA:
10917 case R_PPC64_ADDR16_HIGHEST:
10918 case R_PPC64_ADDR16_HIGHESTA:
10919 case R_PPC64_ADDR16_LO:
10920 case R_PPC64_ADDR16_LO_DS:
10921 case R_PPC64_ADDR24:
10922 case R_PPC64_ADDR32:
10923 case R_PPC64_ADDR64:
10924 case R_PPC64_UADDR16:
10925 case R_PPC64_UADDR32:
10926 case R_PPC64_UADDR64:
10927 dodyn:
10928 if ((input_section->flags & SEC_ALLOC) == 0)
10929 break;
10930
10931 if (NO_OPD_RELOCS && is_opd)
10932 break;
10933
10934 if ((info->shared
10935 && (h == NULL
10936 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10937 || h->elf.root.type != bfd_link_hash_undefweak)
10938 && (MUST_BE_DYN_RELOC (r_type)
10939 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10940 || (ELIMINATE_COPY_RELOCS
10941 && !info->shared
10942 && h != NULL
10943 && h->elf.dynindx != -1
10944 && !h->elf.non_got_ref
10945 && h->elf.def_dynamic
10946 && !h->elf.def_regular))
10947 {
10948 Elf_Internal_Rela outrel;
10949 bfd_boolean skip, relocate;
10950 asection *sreloc;
10951 bfd_byte *loc;
10952 bfd_vma out_off;
10953
10954 /* When generating a dynamic object, these relocations
10955 are copied into the output file to be resolved at run
10956 time. */
10957
10958 skip = FALSE;
10959 relocate = FALSE;
10960
10961 out_off = _bfd_elf_section_offset (output_bfd, info,
10962 input_section, rel->r_offset);
10963 if (out_off == (bfd_vma) -1)
10964 skip = TRUE;
10965 else if (out_off == (bfd_vma) -2)
10966 skip = TRUE, relocate = TRUE;
10967 out_off += (input_section->output_section->vma
10968 + input_section->output_offset);
10969 outrel.r_offset = out_off;
10970 outrel.r_addend = rel->r_addend;
10971
10972 /* Optimize unaligned reloc use. */
10973 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10974 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10975 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10976 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10977 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10978 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10979 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10980 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10981 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10982
10983 if (skip)
10984 memset (&outrel, 0, sizeof outrel);
10985 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10986 && !is_opd
10987 && r_type != R_PPC64_TOC)
10988 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10989 else
10990 {
10991 /* This symbol is local, or marked to become local,
10992 or this is an opd section reloc which must point
10993 at a local function. */
10994 outrel.r_addend += relocation;
10995 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10996 {
10997 if (is_opd && h != NULL)
10998 {
10999 /* Lie about opd entries. This case occurs
11000 when building shared libraries and we
11001 reference a function in another shared
11002 lib. The same thing happens for a weak
11003 definition in an application that's
11004 overridden by a strong definition in a
11005 shared lib. (I believe this is a generic
11006 bug in binutils handling of weak syms.)
11007 In these cases we won't use the opd
11008 entry in this lib. */
11009 unresolved_reloc = FALSE;
11010 }
11011 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11012
11013 /* We need to relocate .opd contents for ld.so.
11014 Prelink also wants simple and consistent rules
11015 for relocs. This make all RELATIVE relocs have
11016 *r_offset equal to r_addend. */
11017 relocate = TRUE;
11018 }
11019 else
11020 {
11021 long indx = 0;
11022
11023 if (bfd_is_abs_section (sec))
11024 ;
11025 else if (sec == NULL || sec->owner == NULL)
11026 {
11027 bfd_set_error (bfd_error_bad_value);
11028 return FALSE;
11029 }
11030 else
11031 {
11032 asection *osec;
11033
11034 osec = sec->output_section;
11035 indx = elf_section_data (osec)->dynindx;
11036
11037 if (indx == 0)
11038 {
11039 if ((osec->flags & SEC_READONLY) == 0
11040 && htab->elf.data_index_section != NULL)
11041 osec = htab->elf.data_index_section;
11042 else
11043 osec = htab->elf.text_index_section;
11044 indx = elf_section_data (osec)->dynindx;
11045 }
11046 BFD_ASSERT (indx != 0);
11047
11048 /* We are turning this relocation into one
11049 against a section symbol, so subtract out
11050 the output section's address but not the
11051 offset of the input section in the output
11052 section. */
11053 outrel.r_addend -= osec->vma;
11054 }
11055
11056 outrel.r_info = ELF64_R_INFO (indx, r_type);
11057 }
11058 }
11059
11060 sreloc = elf_section_data (input_section)->sreloc;
11061 if (sreloc == NULL)
11062 abort ();
11063
11064 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11065 >= sreloc->size)
11066 abort ();
11067 loc = sreloc->contents;
11068 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11069 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11070
11071 /* If this reloc is against an external symbol, it will
11072 be computed at runtime, so there's no need to do
11073 anything now. However, for the sake of prelink ensure
11074 that the section contents are a known value. */
11075 if (! relocate)
11076 {
11077 unresolved_reloc = FALSE;
11078 /* The value chosen here is quite arbitrary as ld.so
11079 ignores section contents except for the special
11080 case of .opd where the contents might be accessed
11081 before relocation. Choose zero, as that won't
11082 cause reloc overflow. */
11083 relocation = 0;
11084 addend = 0;
11085 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11086 to improve backward compatibility with older
11087 versions of ld. */
11088 if (r_type == R_PPC64_ADDR64)
11089 addend = outrel.r_addend;
11090 /* Adjust pc_relative relocs to have zero in *r_offset. */
11091 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11092 addend = (input_section->output_section->vma
11093 + input_section->output_offset
11094 + rel->r_offset);
11095 }
11096 }
11097 break;
11098
11099 case R_PPC64_COPY:
11100 case R_PPC64_GLOB_DAT:
11101 case R_PPC64_JMP_SLOT:
11102 case R_PPC64_RELATIVE:
11103 /* We shouldn't ever see these dynamic relocs in relocatable
11104 files. */
11105 /* Fall through. */
11106
11107 case R_PPC64_PLTGOT16:
11108 case R_PPC64_PLTGOT16_DS:
11109 case R_PPC64_PLTGOT16_HA:
11110 case R_PPC64_PLTGOT16_HI:
11111 case R_PPC64_PLTGOT16_LO:
11112 case R_PPC64_PLTGOT16_LO_DS:
11113 case R_PPC64_PLTREL32:
11114 case R_PPC64_PLTREL64:
11115 /* These ones haven't been implemented yet. */
11116
11117 (*_bfd_error_handler)
11118 (_("%B: relocation %s is not supported for symbol %s."),
11119 input_bfd,
11120 ppc64_elf_howto_table[r_type]->name, sym_name);
11121
11122 bfd_set_error (bfd_error_invalid_operation);
11123 ret = FALSE;
11124 continue;
11125 }
11126
11127 /* Do any further special processing. */
11128 switch (r_type)
11129 {
11130 default:
11131 break;
11132
11133 case R_PPC64_ADDR16_HA:
11134 case R_PPC64_ADDR16_HIGHERA:
11135 case R_PPC64_ADDR16_HIGHESTA:
11136 case R_PPC64_TOC16_HA:
11137 case R_PPC64_SECTOFF_HA:
11138 case R_PPC64_TPREL16_HA:
11139 case R_PPC64_DTPREL16_HA:
11140 case R_PPC64_TPREL16_HIGHER:
11141 case R_PPC64_TPREL16_HIGHERA:
11142 case R_PPC64_TPREL16_HIGHEST:
11143 case R_PPC64_TPREL16_HIGHESTA:
11144 case R_PPC64_DTPREL16_HIGHER:
11145 case R_PPC64_DTPREL16_HIGHERA:
11146 case R_PPC64_DTPREL16_HIGHEST:
11147 case R_PPC64_DTPREL16_HIGHESTA:
11148 /* It's just possible that this symbol is a weak symbol
11149 that's not actually defined anywhere. In that case,
11150 'sec' would be NULL, and we should leave the symbol
11151 alone (it will be set to zero elsewhere in the link). */
11152 if (sec == NULL)
11153 break;
11154 /* Fall thru */
11155
11156 case R_PPC64_GOT16_HA:
11157 case R_PPC64_PLTGOT16_HA:
11158 case R_PPC64_PLT16_HA:
11159 case R_PPC64_GOT_TLSGD16_HA:
11160 case R_PPC64_GOT_TLSLD16_HA:
11161 case R_PPC64_GOT_TPREL16_HA:
11162 case R_PPC64_GOT_DTPREL16_HA:
11163 /* Add 0x10000 if sign bit in 0:15 is set.
11164 Bits 0:15 are not used. */
11165 addend += 0x8000;
11166 break;
11167
11168 case R_PPC64_ADDR16_DS:
11169 case R_PPC64_ADDR16_LO_DS:
11170 case R_PPC64_GOT16_DS:
11171 case R_PPC64_GOT16_LO_DS:
11172 case R_PPC64_PLT16_LO_DS:
11173 case R_PPC64_SECTOFF_DS:
11174 case R_PPC64_SECTOFF_LO_DS:
11175 case R_PPC64_TOC16_DS:
11176 case R_PPC64_TOC16_LO_DS:
11177 case R_PPC64_PLTGOT16_DS:
11178 case R_PPC64_PLTGOT16_LO_DS:
11179 case R_PPC64_GOT_TPREL16_DS:
11180 case R_PPC64_GOT_TPREL16_LO_DS:
11181 case R_PPC64_GOT_DTPREL16_DS:
11182 case R_PPC64_GOT_DTPREL16_LO_DS:
11183 case R_PPC64_TPREL16_DS:
11184 case R_PPC64_TPREL16_LO_DS:
11185 case R_PPC64_DTPREL16_DS:
11186 case R_PPC64_DTPREL16_LO_DS:
11187 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11188 mask = 3;
11189 /* If this reloc is against an lq insn, then the value must be
11190 a multiple of 16. This is somewhat of a hack, but the
11191 "correct" way to do this by defining _DQ forms of all the
11192 _DS relocs bloats all reloc switches in this file. It
11193 doesn't seem to make much sense to use any of these relocs
11194 in data, so testing the insn should be safe. */
11195 if ((insn & (0x3f << 26)) == (56u << 26))
11196 mask = 15;
11197 if (((relocation + addend) & mask) != 0)
11198 {
11199 (*_bfd_error_handler)
11200 (_("%B: error: relocation %s not a multiple of %d"),
11201 input_bfd,
11202 ppc64_elf_howto_table[r_type]->name,
11203 mask + 1);
11204 bfd_set_error (bfd_error_bad_value);
11205 ret = FALSE;
11206 continue;
11207 }
11208 break;
11209 }
11210
11211 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11212 because such sections are not SEC_ALLOC and thus ld.so will
11213 not process them. */
11214 if (unresolved_reloc
11215 && !((input_section->flags & SEC_DEBUGGING) != 0
11216 && h->elf.def_dynamic))
11217 {
11218 (*_bfd_error_handler)
11219 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11220 input_bfd,
11221 input_section,
11222 (long) rel->r_offset,
11223 ppc64_elf_howto_table[(int) r_type]->name,
11224 h->elf.root.root.string);
11225 ret = FALSE;
11226 }
11227
11228 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11229 input_bfd,
11230 input_section,
11231 contents,
11232 rel->r_offset,
11233 relocation,
11234 addend);
11235
11236 if (r != bfd_reloc_ok)
11237 {
11238 if (sym_name == NULL)
11239 sym_name = "(null)";
11240 if (r == bfd_reloc_overflow)
11241 {
11242 if (warned)
11243 continue;
11244 if (h != NULL
11245 && h->elf.root.type == bfd_link_hash_undefweak
11246 && ppc64_elf_howto_table[r_type]->pc_relative)
11247 {
11248 /* Assume this is a call protected by other code that
11249 detects the symbol is undefined. If this is the case,
11250 we can safely ignore the overflow. If not, the
11251 program is hosed anyway, and a little warning isn't
11252 going to help. */
11253
11254 continue;
11255 }
11256
11257 if (!((*info->callbacks->reloc_overflow)
11258 (info, (h ? &h->elf.root : NULL), sym_name,
11259 ppc64_elf_howto_table[r_type]->name,
11260 orig_addend, input_bfd, input_section, rel->r_offset)))
11261 return FALSE;
11262 }
11263 else
11264 {
11265 (*_bfd_error_handler)
11266 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11267 input_bfd,
11268 input_section,
11269 (long) rel->r_offset,
11270 ppc64_elf_howto_table[r_type]->name,
11271 sym_name,
11272 (int) r);
11273 ret = FALSE;
11274 }
11275 }
11276 }
11277
11278 /* If we're emitting relocations, then shortly after this function
11279 returns, reloc offsets and addends for this section will be
11280 adjusted. Worse, reloc symbol indices will be for the output
11281 file rather than the input. Save a copy of the relocs for
11282 opd_entry_value. */
11283 if (is_opd && (info->emitrelocations || info->relocatable))
11284 {
11285 bfd_size_type amt;
11286 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11287 rel = bfd_alloc (input_bfd, amt);
11288 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11289 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11290 if (rel == NULL)
11291 return FALSE;
11292 memcpy (rel, relocs, amt);
11293 }
11294 return ret;
11295 }
11296
11297 /* Adjust the value of any local symbols in opd sections. */
11298
11299 static bfd_boolean
11300 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11301 const char *name ATTRIBUTE_UNUSED,
11302 Elf_Internal_Sym *elfsym,
11303 asection *input_sec,
11304 struct elf_link_hash_entry *h)
11305 {
11306 long *opd_adjust, adjust;
11307 bfd_vma value;
11308
11309 if (h != NULL)
11310 return TRUE;
11311
11312 opd_adjust = get_opd_info (input_sec);
11313 if (opd_adjust == NULL)
11314 return TRUE;
11315
11316 value = elfsym->st_value - input_sec->output_offset;
11317 if (!info->relocatable)
11318 value -= input_sec->output_section->vma;
11319
11320 adjust = opd_adjust[value / 8];
11321 if (adjust == -1)
11322 elfsym->st_value = 0;
11323 else
11324 elfsym->st_value += adjust;
11325 return TRUE;
11326 }
11327
11328 /* Finish up dynamic symbol handling. We set the contents of various
11329 dynamic sections here. */
11330
11331 static bfd_boolean
11332 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11333 struct bfd_link_info *info,
11334 struct elf_link_hash_entry *h,
11335 Elf_Internal_Sym *sym)
11336 {
11337 struct ppc_link_hash_table *htab;
11338 struct plt_entry *ent;
11339 Elf_Internal_Rela rela;
11340 bfd_byte *loc;
11341
11342 htab = ppc_hash_table (info);
11343
11344 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11345 if (ent->plt.offset != (bfd_vma) -1)
11346 {
11347 /* This symbol has an entry in the procedure linkage
11348 table. Set it up. */
11349
11350 if (htab->plt == NULL
11351 || htab->relplt == NULL
11352 || htab->glink == NULL)
11353 abort ();
11354
11355 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11356 fill in the PLT entry. */
11357 rela.r_offset = (htab->plt->output_section->vma
11358 + htab->plt->output_offset
11359 + ent->plt.offset);
11360 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11361 rela.r_addend = ent->addend;
11362
11363 loc = htab->relplt->contents;
11364 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11365 * sizeof (Elf64_External_Rela));
11366 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11367 }
11368
11369 if (h->needs_copy)
11370 {
11371 Elf_Internal_Rela rela;
11372 bfd_byte *loc;
11373
11374 /* This symbol needs a copy reloc. Set it up. */
11375
11376 if (h->dynindx == -1
11377 || (h->root.type != bfd_link_hash_defined
11378 && h->root.type != bfd_link_hash_defweak)
11379 || htab->relbss == NULL)
11380 abort ();
11381
11382 rela.r_offset = (h->root.u.def.value
11383 + h->root.u.def.section->output_section->vma
11384 + h->root.u.def.section->output_offset);
11385 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11386 rela.r_addend = 0;
11387 loc = htab->relbss->contents;
11388 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11389 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11390 }
11391
11392 /* Mark some specially defined symbols as absolute. */
11393 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11394 sym->st_shndx = SHN_ABS;
11395
11396 return TRUE;
11397 }
11398
11399 /* Used to decide how to sort relocs in an optimal manner for the
11400 dynamic linker, before writing them out. */
11401
11402 static enum elf_reloc_type_class
11403 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11404 {
11405 enum elf_ppc64_reloc_type r_type;
11406
11407 r_type = ELF64_R_TYPE (rela->r_info);
11408 switch (r_type)
11409 {
11410 case R_PPC64_RELATIVE:
11411 return reloc_class_relative;
11412 case R_PPC64_JMP_SLOT:
11413 return reloc_class_plt;
11414 case R_PPC64_COPY:
11415 return reloc_class_copy;
11416 default:
11417 return reloc_class_normal;
11418 }
11419 }
11420
11421 /* Finish up the dynamic sections. */
11422
11423 static bfd_boolean
11424 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11425 struct bfd_link_info *info)
11426 {
11427 struct ppc_link_hash_table *htab;
11428 bfd *dynobj;
11429 asection *sdyn;
11430
11431 htab = ppc_hash_table (info);
11432 dynobj = htab->elf.dynobj;
11433 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11434
11435 if (htab->elf.dynamic_sections_created)
11436 {
11437 Elf64_External_Dyn *dyncon, *dynconend;
11438
11439 if (sdyn == NULL || htab->got == NULL)
11440 abort ();
11441
11442 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11443 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11444 for (; dyncon < dynconend; dyncon++)
11445 {
11446 Elf_Internal_Dyn dyn;
11447 asection *s;
11448
11449 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11450
11451 switch (dyn.d_tag)
11452 {
11453 default:
11454 continue;
11455
11456 case DT_PPC64_GLINK:
11457 s = htab->glink;
11458 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11459 /* We stupidly defined DT_PPC64_GLINK to be the start
11460 of glink rather than the first entry point, which is
11461 what ld.so needs, and now have a bigger stub to
11462 support automatic multiple TOCs. */
11463 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11464 break;
11465
11466 case DT_PPC64_OPD:
11467 s = bfd_get_section_by_name (output_bfd, ".opd");
11468 if (s == NULL)
11469 continue;
11470 dyn.d_un.d_ptr = s->vma;
11471 break;
11472
11473 case DT_PPC64_OPDSZ:
11474 s = bfd_get_section_by_name (output_bfd, ".opd");
11475 if (s == NULL)
11476 continue;
11477 dyn.d_un.d_val = s->size;
11478 break;
11479
11480 case DT_PLTGOT:
11481 s = htab->plt;
11482 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11483 break;
11484
11485 case DT_JMPREL:
11486 s = htab->relplt;
11487 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11488 break;
11489
11490 case DT_PLTRELSZ:
11491 dyn.d_un.d_val = htab->relplt->size;
11492 break;
11493
11494 case DT_RELASZ:
11495 /* Don't count procedure linkage table relocs in the
11496 overall reloc count. */
11497 s = htab->relplt;
11498 if (s == NULL)
11499 continue;
11500 dyn.d_un.d_val -= s->size;
11501 break;
11502
11503 case DT_RELA:
11504 /* We may not be using the standard ELF linker script.
11505 If .rela.plt is the first .rela section, we adjust
11506 DT_RELA to not include it. */
11507 s = htab->relplt;
11508 if (s == NULL)
11509 continue;
11510 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11511 continue;
11512 dyn.d_un.d_ptr += s->size;
11513 break;
11514 }
11515
11516 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11517 }
11518 }
11519
11520 if (htab->got != NULL && htab->got->size != 0)
11521 {
11522 /* Fill in the first entry in the global offset table.
11523 We use it to hold the link-time TOCbase. */
11524 bfd_put_64 (output_bfd,
11525 elf_gp (output_bfd) + TOC_BASE_OFF,
11526 htab->got->contents);
11527
11528 /* Set .got entry size. */
11529 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11530 }
11531
11532 if (htab->plt != NULL && htab->plt->size != 0)
11533 {
11534 /* Set .plt entry size. */
11535 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11536 = PLT_ENTRY_SIZE;
11537 }
11538
11539 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11540 brlt ourselves if emitrelocations. */
11541 if (htab->brlt != NULL
11542 && htab->brlt->reloc_count != 0
11543 && !_bfd_elf_link_output_relocs (output_bfd,
11544 htab->brlt,
11545 &elf_section_data (htab->brlt)->rel_hdr,
11546 elf_section_data (htab->brlt)->relocs,
11547 NULL))
11548 return FALSE;
11549
11550 /* We need to handle writing out multiple GOT sections ourselves,
11551 since we didn't add them to DYNOBJ. We know dynobj is the first
11552 bfd. */
11553 while ((dynobj = dynobj->link_next) != NULL)
11554 {
11555 asection *s;
11556
11557 if (!is_ppc64_elf_target (dynobj->xvec))
11558 continue;
11559
11560 s = ppc64_elf_tdata (dynobj)->got;
11561 if (s != NULL
11562 && s->size != 0
11563 && s->output_section != bfd_abs_section_ptr
11564 && !bfd_set_section_contents (output_bfd, s->output_section,
11565 s->contents, s->output_offset,
11566 s->size))
11567 return FALSE;
11568 s = ppc64_elf_tdata (dynobj)->relgot;
11569 if (s != NULL
11570 && s->size != 0
11571 && s->output_section != bfd_abs_section_ptr
11572 && !bfd_set_section_contents (output_bfd, s->output_section,
11573 s->contents, s->output_offset,
11574 s->size))
11575 return FALSE;
11576 }
11577
11578 return TRUE;
11579 }
11580
11581 #include "elf64-target.h"
GDB Binutils - Deliverables
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