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2008-01-11 Tristan Gingold <gingold@adacore.com>
[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 /* Have udata.p point back to the original symbol this
2963 synthetic symbol was derived from. */
2964 s->udata.p = syms[i];
2965 s++;
2966 }
2967 }
2968 }
2969 else
2970 {
2971 bfd_byte *contents;
2972 size_t size;
2973
2974 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2975 {
2976 if (contents)
2977 {
2978 free_contents_and_exit:
2979 free (contents);
2980 }
2981 count = -1;
2982 goto done;
2983 }
2984
2985 size = 0;
2986 for (i = secsymend; i < opdsymend; ++i)
2987 {
2988 bfd_vma ent;
2989
2990 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2991 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2992 {
2993 ++count;
2994 size += sizeof (asymbol);
2995 size += strlen (syms[i]->name) + 2;
2996 }
2997 }
2998
2999 s = *ret = bfd_malloc (size);
3000 if (s == NULL)
3001 goto free_contents_and_exit;
3002
3003 names = (char *) (s + count);
3004
3005 for (i = secsymend; i < opdsymend; ++i)
3006 {
3007 bfd_vma ent;
3008
3009 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3010 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3011 {
3012 long lo, hi;
3013 size_t len;
3014 asection *sec = abfd->sections;
3015
3016 *s = *syms[i];
3017 lo = codesecsym;
3018 hi = codesecsymend;
3019 while (lo < hi)
3020 {
3021 long mid = (lo + hi) >> 1;
3022 if (syms[mid]->section->vma < ent)
3023 lo = mid + 1;
3024 else if (syms[mid]->section->vma > ent)
3025 hi = mid;
3026 else
3027 {
3028 sec = syms[mid]->section;
3029 break;
3030 }
3031 }
3032
3033 if (lo >= hi && lo > codesecsym)
3034 sec = syms[lo - 1]->section;
3035
3036 for (; sec != NULL; sec = sec->next)
3037 {
3038 if (sec->vma > ent)
3039 break;
3040 if ((sec->flags & SEC_ALLOC) == 0
3041 || (sec->flags & SEC_LOAD) == 0)
3042 break;
3043 if ((sec->flags & SEC_CODE) != 0)
3044 s->section = sec;
3045 }
3046 s->value = ent - s->section->vma;
3047 s->name = names;
3048 *names++ = '.';
3049 len = strlen (syms[i]->name);
3050 memcpy (names, syms[i]->name, len + 1);
3051 names += len + 1;
3052 /* Have udata.p point back to the original symbol this
3053 synthetic symbol was derived from. */
3054 s->udata.p = syms[i];
3055 s++;
3056 }
3057 }
3058 free (contents);
3059 }
3060
3061 done:
3062 free (syms);
3063 return count;
3064 }
3065 \f
3066 /* The following functions are specific to the ELF linker, while
3067 functions above are used generally. Those named ppc64_elf_* are
3068 called by the main ELF linker code. They appear in this file more
3069 or less in the order in which they are called. eg.
3070 ppc64_elf_check_relocs is called early in the link process,
3071 ppc64_elf_finish_dynamic_sections is one of the last functions
3072 called.
3073
3074 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3075 functions have both a function code symbol and a function descriptor
3076 symbol. A call to foo in a relocatable object file looks like:
3077
3078 . .text
3079 . x:
3080 . bl .foo
3081 . nop
3082
3083 The function definition in another object file might be:
3084
3085 . .section .opd
3086 . foo: .quad .foo
3087 . .quad .TOC.@tocbase
3088 . .quad 0
3089 .
3090 . .text
3091 . .foo: blr
3092
3093 When the linker resolves the call during a static link, the branch
3094 unsurprisingly just goes to .foo and the .opd information is unused.
3095 If the function definition is in a shared library, things are a little
3096 different: The call goes via a plt call stub, the opd information gets
3097 copied to the plt, and the linker patches the nop.
3098
3099 . x:
3100 . bl .foo_stub
3101 . ld 2,40(1)
3102 .
3103 .
3104 . .foo_stub:
3105 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3106 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3107 . std 2,40(1) # this is the general idea
3108 . ld 11,0(12)
3109 . ld 2,8(12)
3110 . mtctr 11
3111 . ld 11,16(12)
3112 . bctr
3113 .
3114 . .section .plt
3115 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3116
3117 The "reloc ()" notation is supposed to indicate that the linker emits
3118 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3119 copying.
3120
3121 What are the difficulties here? Well, firstly, the relocations
3122 examined by the linker in check_relocs are against the function code
3123 sym .foo, while the dynamic relocation in the plt is emitted against
3124 the function descriptor symbol, foo. Somewhere along the line, we need
3125 to carefully copy dynamic link information from one symbol to the other.
3126 Secondly, the generic part of the elf linker will make .foo a dynamic
3127 symbol as is normal for most other backends. We need foo dynamic
3128 instead, at least for an application final link. However, when
3129 creating a shared library containing foo, we need to have both symbols
3130 dynamic so that references to .foo are satisfied during the early
3131 stages of linking. Otherwise the linker might decide to pull in a
3132 definition from some other object, eg. a static library.
3133
3134 Update: As of August 2004, we support a new convention. Function
3135 calls may use the function descriptor symbol, ie. "bl foo". This
3136 behaves exactly as "bl .foo". */
3137
3138 /* The linker needs to keep track of the number of relocs that it
3139 decides to copy as dynamic relocs in check_relocs for each symbol.
3140 This is so that it can later discard them if they are found to be
3141 unnecessary. We store the information in a field extending the
3142 regular ELF linker hash table. */
3143
3144 struct ppc_dyn_relocs
3145 {
3146 struct ppc_dyn_relocs *next;
3147
3148 /* The input section of the reloc. */
3149 asection *sec;
3150
3151 /* Total number of relocs copied for the input section. */
3152 bfd_size_type count;
3153
3154 /* Number of pc-relative relocs copied for the input section. */
3155 bfd_size_type pc_count;
3156 };
3157
3158 /* Track GOT entries needed for a given symbol. We might need more
3159 than one got entry per symbol. */
3160 struct got_entry
3161 {
3162 struct got_entry *next;
3163
3164 /* The symbol addend that we'll be placing in the GOT. */
3165 bfd_vma addend;
3166
3167 /* Unlike other ELF targets, we use separate GOT entries for the same
3168 symbol referenced from different input files. This is to support
3169 automatic multiple TOC/GOT sections, where the TOC base can vary
3170 from one input file to another. FIXME: After group_sections we
3171 ought to merge entries within the group.
3172
3173 Point to the BFD owning this GOT entry. */
3174 bfd *owner;
3175
3176 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3177 TLS_TPREL or TLS_DTPREL for tls entries. */
3178 char tls_type;
3179
3180 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3181 union
3182 {
3183 bfd_signed_vma refcount;
3184 bfd_vma offset;
3185 } got;
3186 };
3187
3188 /* The same for PLT. */
3189 struct plt_entry
3190 {
3191 struct plt_entry *next;
3192
3193 bfd_vma addend;
3194
3195 union
3196 {
3197 bfd_signed_vma refcount;
3198 bfd_vma offset;
3199 } plt;
3200 };
3201
3202 /* Of those relocs that might be copied as dynamic relocs, this macro
3203 selects those that must be copied when linking a shared library,
3204 even when the symbol is local. */
3205
3206 #define MUST_BE_DYN_RELOC(RTYPE) \
3207 ((RTYPE) != R_PPC64_REL32 \
3208 && (RTYPE) != R_PPC64_REL64 \
3209 && (RTYPE) != R_PPC64_REL30)
3210
3211 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3212 copying dynamic variables from a shared lib into an app's dynbss
3213 section, and instead use a dynamic relocation to point into the
3214 shared lib. With code that gcc generates, it's vital that this be
3215 enabled; In the PowerPC64 ABI, the address of a function is actually
3216 the address of a function descriptor, which resides in the .opd
3217 section. gcc uses the descriptor directly rather than going via the
3218 GOT as some other ABI's do, which means that initialized function
3219 pointers must reference the descriptor. Thus, a function pointer
3220 initialized to the address of a function in a shared library will
3221 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3222 redefines the function descriptor symbol to point to the copy. This
3223 presents a problem as a plt entry for that function is also
3224 initialized from the function descriptor symbol and the copy reloc
3225 may not be initialized first. */
3226 #define ELIMINATE_COPY_RELOCS 1
3227
3228 /* Section name for stubs is the associated section name plus this
3229 string. */
3230 #define STUB_SUFFIX ".stub"
3231
3232 /* Linker stubs.
3233 ppc_stub_long_branch:
3234 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3235 destination, but a 24 bit branch in a stub section will reach.
3236 . b dest
3237
3238 ppc_stub_plt_branch:
3239 Similar to the above, but a 24 bit branch in the stub section won't
3240 reach its destination.
3241 . addis %r12,%r2,xxx@toc@ha
3242 . ld %r11,xxx@toc@l(%r12)
3243 . mtctr %r11
3244 . bctr
3245
3246 ppc_stub_plt_call:
3247 Used to call a function in a shared library. If it so happens that
3248 the plt entry referenced crosses a 64k boundary, then an extra
3249 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3250 . addis %r12,%r2,xxx@toc@ha
3251 . std %r2,40(%r1)
3252 . ld %r11,xxx+0@toc@l(%r12)
3253 . mtctr %r11
3254 . ld %r2,xxx+8@toc@l(%r12)
3255 . ld %r11,xxx+16@toc@l(%r12)
3256 . bctr
3257
3258 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3259 code to adjust the value and save r2 to support multiple toc sections.
3260 A ppc_stub_long_branch with an r2 offset looks like:
3261 . std %r2,40(%r1)
3262 . addis %r2,%r2,off@ha
3263 . addi %r2,%r2,off@l
3264 . b dest
3265
3266 A ppc_stub_plt_branch with an r2 offset looks like:
3267 . std %r2,40(%r1)
3268 . addis %r12,%r2,xxx@toc@ha
3269 . ld %r11,xxx@toc@l(%r12)
3270 . addis %r2,%r2,off@ha
3271 . addi %r2,%r2,off@l
3272 . mtctr %r11
3273 . bctr
3274
3275 In cases where the "addis" instruction would add zero, the "addis" is
3276 omitted and following instructions modified slightly in some cases.
3277 */
3278
3279 enum ppc_stub_type {
3280 ppc_stub_none,
3281 ppc_stub_long_branch,
3282 ppc_stub_long_branch_r2off,
3283 ppc_stub_plt_branch,
3284 ppc_stub_plt_branch_r2off,
3285 ppc_stub_plt_call
3286 };
3287
3288 struct ppc_stub_hash_entry {
3289
3290 /* Base hash table entry structure. */
3291 struct bfd_hash_entry root;
3292
3293 enum ppc_stub_type stub_type;
3294
3295 /* The stub section. */
3296 asection *stub_sec;
3297
3298 /* Offset within stub_sec of the beginning of this stub. */
3299 bfd_vma stub_offset;
3300
3301 /* Given the symbol's value and its section we can determine its final
3302 value when building the stubs (so the stub knows where to jump. */
3303 bfd_vma target_value;
3304 asection *target_section;
3305
3306 /* The symbol table entry, if any, that this was derived from. */
3307 struct ppc_link_hash_entry *h;
3308
3309 /* And the reloc addend that this was derived from. */
3310 bfd_vma addend;
3311
3312 /* Where this stub is being called from, or, in the case of combined
3313 stub sections, the first input section in the group. */
3314 asection *id_sec;
3315 };
3316
3317 struct ppc_branch_hash_entry {
3318
3319 /* Base hash table entry structure. */
3320 struct bfd_hash_entry root;
3321
3322 /* Offset within branch lookup table. */
3323 unsigned int offset;
3324
3325 /* Generation marker. */
3326 unsigned int iter;
3327 };
3328
3329 struct ppc_link_hash_entry
3330 {
3331 struct elf_link_hash_entry elf;
3332
3333 union {
3334 /* A pointer to the most recently used stub hash entry against this
3335 symbol. */
3336 struct ppc_stub_hash_entry *stub_cache;
3337
3338 /* A pointer to the next symbol starting with a '.' */
3339 struct ppc_link_hash_entry *next_dot_sym;
3340 } u;
3341
3342 /* Track dynamic relocs copied for this symbol. */
3343 struct ppc_dyn_relocs *dyn_relocs;
3344
3345 /* Link between function code and descriptor symbols. */
3346 struct ppc_link_hash_entry *oh;
3347
3348 /* Flag function code and descriptor symbols. */
3349 unsigned int is_func:1;
3350 unsigned int is_func_descriptor:1;
3351 unsigned int fake:1;
3352
3353 /* Whether global opd/toc sym has been adjusted or not.
3354 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3355 should be set for all globals defined in any opd/toc section. */
3356 unsigned int adjust_done:1;
3357
3358 /* Set if we twiddled this symbol to weak at some stage. */
3359 unsigned int was_undefined:1;
3360
3361 /* Contexts in which symbol is used in the GOT (or TOC).
3362 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3363 corresponding relocs are encountered during check_relocs.
3364 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3365 indicate the corresponding GOT entry type is not needed.
3366 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3367 a TPREL one. We use a separate flag rather than setting TPREL
3368 just for convenience in distinguishing the two cases. */
3369 #define TLS_GD 1 /* GD reloc. */
3370 #define TLS_LD 2 /* LD reloc. */
3371 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3372 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3373 #define TLS_TLS 16 /* Any TLS reloc. */
3374 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3375 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3376 char tls_mask;
3377 };
3378
3379 /* ppc64 ELF linker hash table. */
3380
3381 struct ppc_link_hash_table
3382 {
3383 struct elf_link_hash_table elf;
3384
3385 /* The stub hash table. */
3386 struct bfd_hash_table stub_hash_table;
3387
3388 /* Another hash table for plt_branch stubs. */
3389 struct bfd_hash_table branch_hash_table;
3390
3391 /* Linker stub bfd. */
3392 bfd *stub_bfd;
3393
3394 /* Linker call-backs. */
3395 asection * (*add_stub_section) (const char *, asection *);
3396 void (*layout_sections_again) (void);
3397
3398 /* Array to keep track of which stub sections have been created, and
3399 information on stub grouping. */
3400 struct map_stub {
3401 /* This is the section to which stubs in the group will be attached. */
3402 asection *link_sec;
3403 /* The stub section. */
3404 asection *stub_sec;
3405 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3406 bfd_vma toc_off;
3407 } *stub_group;
3408
3409 /* Temp used when calculating TOC pointers. */
3410 bfd_vma toc_curr;
3411
3412 /* Highest input section id. */
3413 int top_id;
3414
3415 /* Highest output section index. */
3416 int top_index;
3417
3418 /* Used when adding symbols. */
3419 struct ppc_link_hash_entry *dot_syms;
3420
3421 /* List of input sections for each output section. */
3422 asection **input_list;
3423
3424 /* Short-cuts to get to dynamic linker sections. */
3425 asection *got;
3426 asection *plt;
3427 asection *relplt;
3428 asection *dynbss;
3429 asection *relbss;
3430 asection *glink;
3431 asection *sfpr;
3432 asection *brlt;
3433 asection *relbrlt;
3434
3435 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3436 struct ppc_link_hash_entry *tls_get_addr;
3437 struct ppc_link_hash_entry *tls_get_addr_fd;
3438
3439 /* Statistics. */
3440 unsigned long stub_count[ppc_stub_plt_call];
3441
3442 /* Number of stubs against global syms. */
3443 unsigned long stub_globals;
3444
3445 /* Set if we should emit symbols for stubs. */
3446 unsigned int emit_stub_syms:1;
3447
3448 /* Support for multiple toc sections. */
3449 unsigned int no_multi_toc:1;
3450 unsigned int multi_toc_needed:1;
3451
3452 /* Set on error. */
3453 unsigned int stub_error:1;
3454
3455 /* Temp used by ppc64_elf_check_directives. */
3456 unsigned int twiddled_syms:1;
3457
3458 /* Incremented every time we size stubs. */
3459 unsigned int stub_iteration;
3460
3461 /* Small local sym to section mapping cache. */
3462 struct sym_sec_cache sym_sec;
3463 };
3464
3465 /* Rename some of the generic section flags to better document how they
3466 are used here. */
3467 #define has_toc_reloc has_gp_reloc
3468 #define makes_toc_func_call need_finalize_relax
3469 #define call_check_in_progress reloc_done
3470
3471 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3472
3473 #define ppc_hash_table(p) \
3474 ((struct ppc_link_hash_table *) ((p)->hash))
3475
3476 #define ppc_stub_hash_lookup(table, string, create, copy) \
3477 ((struct ppc_stub_hash_entry *) \
3478 bfd_hash_lookup ((table), (string), (create), (copy)))
3479
3480 #define ppc_branch_hash_lookup(table, string, create, copy) \
3481 ((struct ppc_branch_hash_entry *) \
3482 bfd_hash_lookup ((table), (string), (create), (copy)))
3483
3484 /* Create an entry in the stub hash table. */
3485
3486 static struct bfd_hash_entry *
3487 stub_hash_newfunc (struct bfd_hash_entry *entry,
3488 struct bfd_hash_table *table,
3489 const char *string)
3490 {
3491 /* Allocate the structure if it has not already been allocated by a
3492 subclass. */
3493 if (entry == NULL)
3494 {
3495 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3496 if (entry == NULL)
3497 return entry;
3498 }
3499
3500 /* Call the allocation method of the superclass. */
3501 entry = bfd_hash_newfunc (entry, table, string);
3502 if (entry != NULL)
3503 {
3504 struct ppc_stub_hash_entry *eh;
3505
3506 /* Initialize the local fields. */
3507 eh = (struct ppc_stub_hash_entry *) entry;
3508 eh->stub_type = ppc_stub_none;
3509 eh->stub_sec = NULL;
3510 eh->stub_offset = 0;
3511 eh->target_value = 0;
3512 eh->target_section = NULL;
3513 eh->h = NULL;
3514 eh->id_sec = NULL;
3515 }
3516
3517 return entry;
3518 }
3519
3520 /* Create an entry in the branch hash table. */
3521
3522 static struct bfd_hash_entry *
3523 branch_hash_newfunc (struct bfd_hash_entry *entry,
3524 struct bfd_hash_table *table,
3525 const char *string)
3526 {
3527 /* Allocate the structure if it has not already been allocated by a
3528 subclass. */
3529 if (entry == NULL)
3530 {
3531 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3532 if (entry == NULL)
3533 return entry;
3534 }
3535
3536 /* Call the allocation method of the superclass. */
3537 entry = bfd_hash_newfunc (entry, table, string);
3538 if (entry != NULL)
3539 {
3540 struct ppc_branch_hash_entry *eh;
3541
3542 /* Initialize the local fields. */
3543 eh = (struct ppc_branch_hash_entry *) entry;
3544 eh->offset = 0;
3545 eh->iter = 0;
3546 }
3547
3548 return entry;
3549 }
3550
3551 /* Create an entry in a ppc64 ELF linker hash table. */
3552
3553 static struct bfd_hash_entry *
3554 link_hash_newfunc (struct bfd_hash_entry *entry,
3555 struct bfd_hash_table *table,
3556 const char *string)
3557 {
3558 /* Allocate the structure if it has not already been allocated by a
3559 subclass. */
3560 if (entry == NULL)
3561 {
3562 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3563 if (entry == NULL)
3564 return entry;
3565 }
3566
3567 /* Call the allocation method of the superclass. */
3568 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3569 if (entry != NULL)
3570 {
3571 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3572
3573 memset (&eh->u.stub_cache, 0,
3574 (sizeof (struct ppc_link_hash_entry)
3575 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3576
3577 /* When making function calls, old ABI code references function entry
3578 points (dot symbols), while new ABI code references the function
3579 descriptor symbol. We need to make any combination of reference and
3580 definition work together, without breaking archive linking.
3581
3582 For a defined function "foo" and an undefined call to "bar":
3583 An old object defines "foo" and ".foo", references ".bar" (possibly
3584 "bar" too).
3585 A new object defines "foo" and references "bar".
3586
3587 A new object thus has no problem with its undefined symbols being
3588 satisfied by definitions in an old object. On the other hand, the
3589 old object won't have ".bar" satisfied by a new object.
3590
3591 Keep a list of newly added dot-symbols. */
3592
3593 if (string[0] == '.')
3594 {
3595 struct ppc_link_hash_table *htab;
3596
3597 htab = (struct ppc_link_hash_table *) table;
3598 eh->u.next_dot_sym = htab->dot_syms;
3599 htab->dot_syms = eh;
3600 }
3601 }
3602
3603 return entry;
3604 }
3605
3606 /* Create a ppc64 ELF linker hash table. */
3607
3608 static struct bfd_link_hash_table *
3609 ppc64_elf_link_hash_table_create (bfd *abfd)
3610 {
3611 struct ppc_link_hash_table *htab;
3612 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3613
3614 htab = bfd_zmalloc (amt);
3615 if (htab == NULL)
3616 return NULL;
3617
3618 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3619 sizeof (struct ppc_link_hash_entry)))
3620 {
3621 free (htab);
3622 return NULL;
3623 }
3624
3625 /* Init the stub hash table too. */
3626 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3627 sizeof (struct ppc_stub_hash_entry)))
3628 return NULL;
3629
3630 /* And the branch hash table. */
3631 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3632 sizeof (struct ppc_branch_hash_entry)))
3633 return NULL;
3634
3635 /* Initializing two fields of the union is just cosmetic. We really
3636 only care about glist, but when compiled on a 32-bit host the
3637 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3638 debugger inspection of these fields look nicer. */
3639 htab->elf.init_got_refcount.refcount = 0;
3640 htab->elf.init_got_refcount.glist = NULL;
3641 htab->elf.init_plt_refcount.refcount = 0;
3642 htab->elf.init_plt_refcount.glist = NULL;
3643 htab->elf.init_got_offset.offset = 0;
3644 htab->elf.init_got_offset.glist = NULL;
3645 htab->elf.init_plt_offset.offset = 0;
3646 htab->elf.init_plt_offset.glist = NULL;
3647
3648 return &htab->elf.root;
3649 }
3650
3651 /* Free the derived linker hash table. */
3652
3653 static void
3654 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3655 {
3656 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3657
3658 bfd_hash_table_free (&ret->stub_hash_table);
3659 bfd_hash_table_free (&ret->branch_hash_table);
3660 _bfd_generic_link_hash_table_free (hash);
3661 }
3662
3663 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3664
3665 void
3666 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3667 {
3668 struct ppc_link_hash_table *htab;
3669
3670 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3671
3672 /* Always hook our dynamic sections into the first bfd, which is the
3673 linker created stub bfd. This ensures that the GOT header is at
3674 the start of the output TOC section. */
3675 htab = ppc_hash_table (info);
3676 htab->stub_bfd = abfd;
3677 htab->elf.dynobj = abfd;
3678 }
3679
3680 /* Build a name for an entry in the stub hash table. */
3681
3682 static char *
3683 ppc_stub_name (const asection *input_section,
3684 const asection *sym_sec,
3685 const struct ppc_link_hash_entry *h,
3686 const Elf_Internal_Rela *rel)
3687 {
3688 char *stub_name;
3689 bfd_size_type len;
3690
3691 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3692 offsets from a sym as a branch target? In fact, we could
3693 probably assume the addend is always zero. */
3694 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3695
3696 if (h)
3697 {
3698 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3699 stub_name = bfd_malloc (len);
3700 if (stub_name == NULL)
3701 return stub_name;
3702
3703 sprintf (stub_name, "%08x.%s+%x",
3704 input_section->id & 0xffffffff,
3705 h->elf.root.root.string,
3706 (int) rel->r_addend & 0xffffffff);
3707 }
3708 else
3709 {
3710 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3711 stub_name = bfd_malloc (len);
3712 if (stub_name == NULL)
3713 return stub_name;
3714
3715 sprintf (stub_name, "%08x.%x:%x+%x",
3716 input_section->id & 0xffffffff,
3717 sym_sec->id & 0xffffffff,
3718 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3719 (int) rel->r_addend & 0xffffffff);
3720 }
3721 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3722 stub_name[len - 2] = 0;
3723 return stub_name;
3724 }
3725
3726 /* Look up an entry in the stub hash. Stub entries are cached because
3727 creating the stub name takes a bit of time. */
3728
3729 static struct ppc_stub_hash_entry *
3730 ppc_get_stub_entry (const asection *input_section,
3731 const asection *sym_sec,
3732 struct ppc_link_hash_entry *h,
3733 const Elf_Internal_Rela *rel,
3734 struct ppc_link_hash_table *htab)
3735 {
3736 struct ppc_stub_hash_entry *stub_entry;
3737 const asection *id_sec;
3738
3739 /* If this input section is part of a group of sections sharing one
3740 stub section, then use the id of the first section in the group.
3741 Stub names need to include a section id, as there may well be
3742 more than one stub used to reach say, printf, and we need to
3743 distinguish between them. */
3744 id_sec = htab->stub_group[input_section->id].link_sec;
3745
3746 if (h != NULL && h->u.stub_cache != NULL
3747 && h->u.stub_cache->h == h
3748 && h->u.stub_cache->id_sec == id_sec)
3749 {
3750 stub_entry = h->u.stub_cache;
3751 }
3752 else
3753 {
3754 char *stub_name;
3755
3756 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3757 if (stub_name == NULL)
3758 return NULL;
3759
3760 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3761 stub_name, FALSE, FALSE);
3762 if (h != NULL)
3763 h->u.stub_cache = stub_entry;
3764
3765 free (stub_name);
3766 }
3767
3768 return stub_entry;
3769 }
3770
3771 /* Add a new stub entry to the stub hash. Not all fields of the new
3772 stub entry are initialised. */
3773
3774 static struct ppc_stub_hash_entry *
3775 ppc_add_stub (const char *stub_name,
3776 asection *section,
3777 struct ppc_link_hash_table *htab)
3778 {
3779 asection *link_sec;
3780 asection *stub_sec;
3781 struct ppc_stub_hash_entry *stub_entry;
3782
3783 link_sec = htab->stub_group[section->id].link_sec;
3784 stub_sec = htab->stub_group[section->id].stub_sec;
3785 if (stub_sec == NULL)
3786 {
3787 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3788 if (stub_sec == NULL)
3789 {
3790 size_t namelen;
3791 bfd_size_type len;
3792 char *s_name;
3793
3794 namelen = strlen (link_sec->name);
3795 len = namelen + sizeof (STUB_SUFFIX);
3796 s_name = bfd_alloc (htab->stub_bfd, len);
3797 if (s_name == NULL)
3798 return NULL;
3799
3800 memcpy (s_name, link_sec->name, namelen);
3801 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3802 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3803 if (stub_sec == NULL)
3804 return NULL;
3805 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3806 }
3807 htab->stub_group[section->id].stub_sec = stub_sec;
3808 }
3809
3810 /* Enter this entry into the linker stub hash table. */
3811 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3812 TRUE, FALSE);
3813 if (stub_entry == NULL)
3814 {
3815 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3816 section->owner, stub_name);
3817 return NULL;
3818 }
3819
3820 stub_entry->stub_sec = stub_sec;
3821 stub_entry->stub_offset = 0;
3822 stub_entry->id_sec = link_sec;
3823 return stub_entry;
3824 }
3825
3826 /* Create sections for linker generated code. */
3827
3828 static bfd_boolean
3829 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3830 {
3831 struct ppc_link_hash_table *htab;
3832 flagword flags;
3833
3834 htab = ppc_hash_table (info);
3835
3836 /* Create .sfpr for code to save and restore fp regs. */
3837 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3838 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3839 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3840 flags);
3841 if (htab->sfpr == NULL
3842 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3843 return FALSE;
3844
3845 /* Create .glink for lazy dynamic linking support. */
3846 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3847 flags);
3848 if (htab->glink == NULL
3849 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3850 return FALSE;
3851
3852 /* Create branch lookup table for plt_branch stubs. */
3853 flags = (SEC_ALLOC | SEC_LOAD
3854 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3855 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3856 flags);
3857 if (htab->brlt == NULL
3858 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3859 return FALSE;
3860
3861 if (!info->shared)
3862 return TRUE;
3863
3864 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3865 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3866 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3867 ".rela.branch_lt",
3868 flags);
3869 if (!htab->relbrlt
3870 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3871 return FALSE;
3872
3873 return TRUE;
3874 }
3875
3876 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3877 not already done. */
3878
3879 static bfd_boolean
3880 create_got_section (bfd *abfd, struct bfd_link_info *info)
3881 {
3882 asection *got, *relgot;
3883 flagword flags;
3884 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3885
3886 if (!htab->got)
3887 {
3888 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3889 return FALSE;
3890
3891 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3892 if (!htab->got)
3893 abort ();
3894 }
3895
3896 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3897 | SEC_LINKER_CREATED);
3898
3899 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3900 if (!got
3901 || !bfd_set_section_alignment (abfd, got, 3))
3902 return FALSE;
3903
3904 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3905 flags | SEC_READONLY);
3906 if (!relgot
3907 || ! bfd_set_section_alignment (abfd, relgot, 3))
3908 return FALSE;
3909
3910 ppc64_elf_tdata (abfd)->got = got;
3911 ppc64_elf_tdata (abfd)->relgot = relgot;
3912 return TRUE;
3913 }
3914
3915 /* Create the dynamic sections, and set up shortcuts. */
3916
3917 static bfd_boolean
3918 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3919 {
3920 struct ppc_link_hash_table *htab;
3921
3922 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3923 return FALSE;
3924
3925 htab = ppc_hash_table (info);
3926 if (!htab->got)
3927 htab->got = bfd_get_section_by_name (dynobj, ".got");
3928 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3929 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3930 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3931 if (!info->shared)
3932 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3933
3934 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3935 || (!info->shared && !htab->relbss))
3936 abort ();
3937
3938 return TRUE;
3939 }
3940
3941 /* Merge PLT info on FROM with that on TO. */
3942
3943 static void
3944 move_plt_plist (struct ppc_link_hash_entry *from,
3945 struct ppc_link_hash_entry *to)
3946 {
3947 if (from->elf.plt.plist != NULL)
3948 {
3949 if (to->elf.plt.plist != NULL)
3950 {
3951 struct plt_entry **entp;
3952 struct plt_entry *ent;
3953
3954 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3955 {
3956 struct plt_entry *dent;
3957
3958 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3959 if (dent->addend == ent->addend)
3960 {
3961 dent->plt.refcount += ent->plt.refcount;
3962 *entp = ent->next;
3963 break;
3964 }
3965 if (dent == NULL)
3966 entp = &ent->next;
3967 }
3968 *entp = to->elf.plt.plist;
3969 }
3970
3971 to->elf.plt.plist = from->elf.plt.plist;
3972 from->elf.plt.plist = NULL;
3973 }
3974 }
3975
3976 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3977
3978 static void
3979 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3980 struct elf_link_hash_entry *dir,
3981 struct elf_link_hash_entry *ind)
3982 {
3983 struct ppc_link_hash_entry *edir, *eind;
3984
3985 edir = (struct ppc_link_hash_entry *) dir;
3986 eind = (struct ppc_link_hash_entry *) ind;
3987
3988 /* Copy over any dynamic relocs we may have on the indirect sym. */
3989 if (eind->dyn_relocs != NULL)
3990 {
3991 if (edir->dyn_relocs != NULL)
3992 {
3993 struct ppc_dyn_relocs **pp;
3994 struct ppc_dyn_relocs *p;
3995
3996 /* Add reloc counts against the indirect sym to the direct sym
3997 list. Merge any entries against the same section. */
3998 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3999 {
4000 struct ppc_dyn_relocs *q;
4001
4002 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4003 if (q->sec == p->sec)
4004 {
4005 q->pc_count += p->pc_count;
4006 q->count += p->count;
4007 *pp = p->next;
4008 break;
4009 }
4010 if (q == NULL)
4011 pp = &p->next;
4012 }
4013 *pp = edir->dyn_relocs;
4014 }
4015
4016 edir->dyn_relocs = eind->dyn_relocs;
4017 eind->dyn_relocs = NULL;
4018 }
4019
4020 edir->is_func |= eind->is_func;
4021 edir->is_func_descriptor |= eind->is_func_descriptor;
4022 edir->tls_mask |= eind->tls_mask;
4023
4024 /* If called to transfer flags for a weakdef during processing
4025 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4026 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4027 if (!(ELIMINATE_COPY_RELOCS
4028 && eind->elf.root.type != bfd_link_hash_indirect
4029 && edir->elf.dynamic_adjusted))
4030 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4031
4032 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4033 edir->elf.ref_regular |= eind->elf.ref_regular;
4034 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4035 edir->elf.needs_plt |= eind->elf.needs_plt;
4036
4037 /* If we were called to copy over info for a weak sym, that's all. */
4038 if (eind->elf.root.type != bfd_link_hash_indirect)
4039 return;
4040
4041 /* Copy over got entries that we may have already seen to the
4042 symbol which just became indirect. */
4043 if (eind->elf.got.glist != NULL)
4044 {
4045 if (edir->elf.got.glist != NULL)
4046 {
4047 struct got_entry **entp;
4048 struct got_entry *ent;
4049
4050 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4051 {
4052 struct got_entry *dent;
4053
4054 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4055 if (dent->addend == ent->addend
4056 && dent->owner == ent->owner
4057 && dent->tls_type == ent->tls_type)
4058 {
4059 dent->got.refcount += ent->got.refcount;
4060 *entp = ent->next;
4061 break;
4062 }
4063 if (dent == NULL)
4064 entp = &ent->next;
4065 }
4066 *entp = edir->elf.got.glist;
4067 }
4068
4069 edir->elf.got.glist = eind->elf.got.glist;
4070 eind->elf.got.glist = NULL;
4071 }
4072
4073 /* And plt entries. */
4074 move_plt_plist (eind, edir);
4075
4076 if (eind->elf.dynindx != -1)
4077 {
4078 if (edir->elf.dynindx != -1)
4079 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4080 edir->elf.dynstr_index);
4081 edir->elf.dynindx = eind->elf.dynindx;
4082 edir->elf.dynstr_index = eind->elf.dynstr_index;
4083 eind->elf.dynindx = -1;
4084 eind->elf.dynstr_index = 0;
4085 }
4086 }
4087
4088 /* Find the function descriptor hash entry from the given function code
4089 hash entry FH. Link the entries via their OH fields. */
4090
4091 static struct ppc_link_hash_entry *
4092 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4093 {
4094 struct ppc_link_hash_entry *fdh = fh->oh;
4095
4096 if (fdh == NULL)
4097 {
4098 const char *fd_name = fh->elf.root.root.string + 1;
4099
4100 fdh = (struct ppc_link_hash_entry *)
4101 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4102 if (fdh != NULL)
4103 {
4104 fdh->is_func_descriptor = 1;
4105 fdh->oh = fh;
4106 fh->is_func = 1;
4107 fh->oh = fdh;
4108 }
4109 }
4110
4111 return fdh;
4112 }
4113
4114 /* Make a fake function descriptor sym for the code sym FH. */
4115
4116 static struct ppc_link_hash_entry *
4117 make_fdh (struct bfd_link_info *info,
4118 struct ppc_link_hash_entry *fh)
4119 {
4120 bfd *abfd;
4121 asymbol *newsym;
4122 struct bfd_link_hash_entry *bh;
4123 struct ppc_link_hash_entry *fdh;
4124
4125 abfd = fh->elf.root.u.undef.abfd;
4126 newsym = bfd_make_empty_symbol (abfd);
4127 newsym->name = fh->elf.root.root.string + 1;
4128 newsym->section = bfd_und_section_ptr;
4129 newsym->value = 0;
4130 newsym->flags = BSF_WEAK;
4131
4132 bh = NULL;
4133 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4134 newsym->flags, newsym->section,
4135 newsym->value, NULL, FALSE, FALSE,
4136 &bh))
4137 return NULL;
4138
4139 fdh = (struct ppc_link_hash_entry *) bh;
4140 fdh->elf.non_elf = 0;
4141 fdh->fake = 1;
4142 fdh->is_func_descriptor = 1;
4143 fdh->oh = fh;
4144 fh->is_func = 1;
4145 fh->oh = fdh;
4146 return fdh;
4147 }
4148
4149 /* Fix function descriptor symbols defined in .opd sections to be
4150 function type. */
4151
4152 static bfd_boolean
4153 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4154 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4155 Elf_Internal_Sym *isym,
4156 const char **name ATTRIBUTE_UNUSED,
4157 flagword *flags ATTRIBUTE_UNUSED,
4158 asection **sec,
4159 bfd_vma *value ATTRIBUTE_UNUSED)
4160 {
4161 if (*sec != NULL
4162 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4163 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4164
4165 return TRUE;
4166 }
4167
4168 /* This function makes an old ABI object reference to ".bar" cause the
4169 inclusion of a new ABI object archive that defines "bar".
4170 NAME is a symbol defined in an archive. Return a symbol in the hash
4171 table that might be satisfied by the archive symbols. */
4172
4173 static struct elf_link_hash_entry *
4174 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4175 struct bfd_link_info *info,
4176 const char *name)
4177 {
4178 struct elf_link_hash_entry *h;
4179 char *dot_name;
4180 size_t len;
4181
4182 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4183 if (h != NULL
4184 /* Don't return this sym if it is a fake function descriptor
4185 created by add_symbol_adjust. */
4186 && !(h->root.type == bfd_link_hash_undefweak
4187 && ((struct ppc_link_hash_entry *) h)->fake))
4188 return h;
4189
4190 if (name[0] == '.')
4191 return h;
4192
4193 len = strlen (name);
4194 dot_name = bfd_alloc (abfd, len + 2);
4195 if (dot_name == NULL)
4196 return (struct elf_link_hash_entry *) 0 - 1;
4197 dot_name[0] = '.';
4198 memcpy (dot_name + 1, name, len + 1);
4199 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4200 bfd_release (abfd, dot_name);
4201 return h;
4202 }
4203
4204 /* This function satisfies all old ABI object references to ".bar" if a
4205 new ABI object defines "bar". Well, at least, undefined dot symbols
4206 are made weak. This stops later archive searches from including an
4207 object if we already have a function descriptor definition. It also
4208 prevents the linker complaining about undefined symbols.
4209 We also check and correct mismatched symbol visibility here. The
4210 most restrictive visibility of the function descriptor and the
4211 function entry symbol is used. */
4212
4213 static bfd_boolean
4214 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4215 {
4216 struct ppc_link_hash_table *htab;
4217 struct ppc_link_hash_entry *fdh;
4218
4219 if (eh->elf.root.type == bfd_link_hash_indirect)
4220 return TRUE;
4221
4222 if (eh->elf.root.type == bfd_link_hash_warning)
4223 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4224
4225 if (eh->elf.root.root.string[0] != '.')
4226 abort ();
4227
4228 htab = ppc_hash_table (info);
4229 fdh = get_fdh (eh, htab);
4230 if (fdh == NULL
4231 && !info->relocatable
4232 && (eh->elf.root.type == bfd_link_hash_undefined
4233 || eh->elf.root.type == bfd_link_hash_undefweak)
4234 && eh->elf.ref_regular)
4235 {
4236 /* Make an undefweak function descriptor sym, which is enough to
4237 pull in an --as-needed shared lib, but won't cause link
4238 errors. Archives are handled elsewhere. */
4239 fdh = make_fdh (info, eh);
4240 if (fdh == NULL)
4241 return FALSE;
4242 else
4243 fdh->elf.ref_regular = 1;
4244 }
4245 else if (fdh != NULL)
4246 {
4247 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4248 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4249 if (entry_vis < descr_vis)
4250 fdh->elf.other += entry_vis - descr_vis;
4251 else if (entry_vis > descr_vis)
4252 eh->elf.other += descr_vis - entry_vis;
4253
4254 if ((fdh->elf.root.type == bfd_link_hash_defined
4255 || fdh->elf.root.type == bfd_link_hash_defweak)
4256 && eh->elf.root.type == bfd_link_hash_undefined)
4257 {
4258 eh->elf.root.type = bfd_link_hash_undefweak;
4259 eh->was_undefined = 1;
4260 htab->twiddled_syms = 1;
4261 }
4262 }
4263
4264 return TRUE;
4265 }
4266
4267 /* Process list of dot-symbols we made in link_hash_newfunc. */
4268
4269 static bfd_boolean
4270 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4271 {
4272 struct ppc_link_hash_table *htab;
4273 struct ppc_link_hash_entry **p, *eh;
4274
4275 htab = ppc_hash_table (info);
4276 if (!is_ppc64_elf_target (htab->elf.root.creator))
4277 return TRUE;
4278
4279 if (is_ppc64_elf_target (ibfd->xvec))
4280 {
4281 p = &htab->dot_syms;
4282 while ((eh = *p) != NULL)
4283 {
4284 *p = NULL;
4285 if (!add_symbol_adjust (eh, info))
4286 return FALSE;
4287 p = &eh->u.next_dot_sym;
4288 }
4289 }
4290
4291 /* Clear the list for non-ppc64 input files. */
4292 p = &htab->dot_syms;
4293 while ((eh = *p) != NULL)
4294 {
4295 *p = NULL;
4296 p = &eh->u.next_dot_sym;
4297 }
4298
4299 /* We need to fix the undefs list for any syms we have twiddled to
4300 undef_weak. */
4301 if (htab->twiddled_syms)
4302 {
4303 bfd_link_repair_undef_list (&htab->elf.root);
4304 htab->twiddled_syms = 0;
4305 }
4306 return TRUE;
4307 }
4308
4309 /* Undo hash table changes when an --as-needed input file is determined
4310 not to be needed. */
4311
4312 static bfd_boolean
4313 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4314 struct bfd_link_info *info)
4315 {
4316 ppc_hash_table (info)->dot_syms = NULL;
4317 return TRUE;
4318 }
4319
4320 static bfd_boolean
4321 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4322 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4323 {
4324 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4325 char *local_got_tls_masks;
4326
4327 if (local_got_ents == NULL)
4328 {
4329 bfd_size_type size = symtab_hdr->sh_info;
4330
4331 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4332 local_got_ents = bfd_zalloc (abfd, size);
4333 if (local_got_ents == NULL)
4334 return FALSE;
4335 elf_local_got_ents (abfd) = local_got_ents;
4336 }
4337
4338 if ((tls_type & TLS_EXPLICIT) == 0)
4339 {
4340 struct got_entry *ent;
4341
4342 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4343 if (ent->addend == r_addend
4344 && ent->owner == abfd
4345 && ent->tls_type == tls_type)
4346 break;
4347 if (ent == NULL)
4348 {
4349 bfd_size_type amt = sizeof (*ent);
4350 ent = bfd_alloc (abfd, amt);
4351 if (ent == NULL)
4352 return FALSE;
4353 ent->next = local_got_ents[r_symndx];
4354 ent->addend = r_addend;
4355 ent->owner = abfd;
4356 ent->tls_type = tls_type;
4357 ent->got.refcount = 0;
4358 local_got_ents[r_symndx] = ent;
4359 }
4360 ent->got.refcount += 1;
4361 }
4362
4363 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4364 local_got_tls_masks[r_symndx] |= tls_type;
4365 return TRUE;
4366 }
4367
4368 static bfd_boolean
4369 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4370 {
4371 struct plt_entry *ent;
4372
4373 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4374 if (ent->addend == addend)
4375 break;
4376 if (ent == NULL)
4377 {
4378 bfd_size_type amt = sizeof (*ent);
4379 ent = bfd_alloc (abfd, amt);
4380 if (ent == NULL)
4381 return FALSE;
4382 ent->next = eh->elf.plt.plist;
4383 ent->addend = addend;
4384 ent->plt.refcount = 0;
4385 eh->elf.plt.plist = ent;
4386 }
4387 ent->plt.refcount += 1;
4388 eh->elf.needs_plt = 1;
4389 if (eh->elf.root.root.string[0] == '.'
4390 && eh->elf.root.root.string[1] != '\0')
4391 eh->is_func = 1;
4392 return TRUE;
4393 }
4394
4395 /* Look through the relocs for a section during the first phase, and
4396 calculate needed space in the global offset table, procedure
4397 linkage table, and dynamic reloc sections. */
4398
4399 static bfd_boolean
4400 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4401 asection *sec, const Elf_Internal_Rela *relocs)
4402 {
4403 struct ppc_link_hash_table *htab;
4404 Elf_Internal_Shdr *symtab_hdr;
4405 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4406 const Elf_Internal_Rela *rel;
4407 const Elf_Internal_Rela *rel_end;
4408 asection *sreloc;
4409 asection **opd_sym_map;
4410
4411 if (info->relocatable)
4412 return TRUE;
4413
4414 /* Don't do anything special with non-loaded, non-alloced sections.
4415 In particular, any relocs in such sections should not affect GOT
4416 and PLT reference counting (ie. we don't allow them to create GOT
4417 or PLT entries), there's no possibility or desire to optimize TLS
4418 relocs, and there's not much point in propagating relocs to shared
4419 libs that the dynamic linker won't relocate. */
4420 if ((sec->flags & SEC_ALLOC) == 0)
4421 return TRUE;
4422
4423 htab = ppc_hash_table (info);
4424 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4425
4426 sym_hashes = elf_sym_hashes (abfd);
4427 sym_hashes_end = (sym_hashes
4428 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4429 - symtab_hdr->sh_info);
4430
4431 sreloc = NULL;
4432 opd_sym_map = NULL;
4433 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4434 {
4435 /* Garbage collection needs some extra help with .opd sections.
4436 We don't want to necessarily keep everything referenced by
4437 relocs in .opd, as that would keep all functions. Instead,
4438 if we reference an .opd symbol (a function descriptor), we
4439 want to keep the function code symbol's section. This is
4440 easy for global symbols, but for local syms we need to keep
4441 information about the associated function section. Later, if
4442 edit_opd deletes entries, we'll use this array to adjust
4443 local syms in .opd. */
4444 union opd_info {
4445 asection *func_section;
4446 long entry_adjust;
4447 };
4448 bfd_size_type amt;
4449
4450 amt = sec->size * sizeof (union opd_info) / 8;
4451 opd_sym_map = bfd_zalloc (abfd, amt);
4452 if (opd_sym_map == NULL)
4453 return FALSE;
4454 ppc64_elf_section_data (sec)->u.opd_func_sec = opd_sym_map;
4455 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4456 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4457 }
4458
4459 if (htab->sfpr == NULL
4460 && !create_linkage_sections (htab->elf.dynobj, info))
4461 return FALSE;
4462
4463 rel_end = relocs + sec->reloc_count;
4464 for (rel = relocs; rel < rel_end; rel++)
4465 {
4466 unsigned long r_symndx;
4467 struct elf_link_hash_entry *h;
4468 enum elf_ppc64_reloc_type r_type;
4469 int tls_type = 0;
4470 struct _ppc64_elf_section_data *ppc64_sec;
4471
4472 r_symndx = ELF64_R_SYM (rel->r_info);
4473 if (r_symndx < symtab_hdr->sh_info)
4474 h = NULL;
4475 else
4476 {
4477 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4478 while (h->root.type == bfd_link_hash_indirect
4479 || h->root.type == bfd_link_hash_warning)
4480 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4481 }
4482
4483 r_type = ELF64_R_TYPE (rel->r_info);
4484 switch (r_type)
4485 {
4486 case R_PPC64_GOT_TLSLD16:
4487 case R_PPC64_GOT_TLSLD16_LO:
4488 case R_PPC64_GOT_TLSLD16_HI:
4489 case R_PPC64_GOT_TLSLD16_HA:
4490 tls_type = TLS_TLS | TLS_LD;
4491 goto dogottls;
4492
4493 case R_PPC64_GOT_TLSGD16:
4494 case R_PPC64_GOT_TLSGD16_LO:
4495 case R_PPC64_GOT_TLSGD16_HI:
4496 case R_PPC64_GOT_TLSGD16_HA:
4497 tls_type = TLS_TLS | TLS_GD;
4498 goto dogottls;
4499
4500 case R_PPC64_GOT_TPREL16_DS:
4501 case R_PPC64_GOT_TPREL16_LO_DS:
4502 case R_PPC64_GOT_TPREL16_HI:
4503 case R_PPC64_GOT_TPREL16_HA:
4504 if (info->shared)
4505 info->flags |= DF_STATIC_TLS;
4506 tls_type = TLS_TLS | TLS_TPREL;
4507 goto dogottls;
4508
4509 case R_PPC64_GOT_DTPREL16_DS:
4510 case R_PPC64_GOT_DTPREL16_LO_DS:
4511 case R_PPC64_GOT_DTPREL16_HI:
4512 case R_PPC64_GOT_DTPREL16_HA:
4513 tls_type = TLS_TLS | TLS_DTPREL;
4514 dogottls:
4515 sec->has_tls_reloc = 1;
4516 /* Fall thru */
4517
4518 case R_PPC64_GOT16:
4519 case R_PPC64_GOT16_DS:
4520 case R_PPC64_GOT16_HA:
4521 case R_PPC64_GOT16_HI:
4522 case R_PPC64_GOT16_LO:
4523 case R_PPC64_GOT16_LO_DS:
4524 /* This symbol requires a global offset table entry. */
4525 sec->has_toc_reloc = 1;
4526 if (ppc64_elf_tdata (abfd)->got == NULL
4527 && !create_got_section (abfd, info))
4528 return FALSE;
4529
4530 if (h != NULL)
4531 {
4532 struct ppc_link_hash_entry *eh;
4533 struct got_entry *ent;
4534
4535 eh = (struct ppc_link_hash_entry *) h;
4536 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4537 if (ent->addend == rel->r_addend
4538 && ent->owner == abfd
4539 && ent->tls_type == tls_type)
4540 break;
4541 if (ent == NULL)
4542 {
4543 bfd_size_type amt = sizeof (*ent);
4544 ent = bfd_alloc (abfd, amt);
4545 if (ent == NULL)
4546 return FALSE;
4547 ent->next = eh->elf.got.glist;
4548 ent->addend = rel->r_addend;
4549 ent->owner = abfd;
4550 ent->tls_type = tls_type;
4551 ent->got.refcount = 0;
4552 eh->elf.got.glist = ent;
4553 }
4554 ent->got.refcount += 1;
4555 eh->tls_mask |= tls_type;
4556 }
4557 else
4558 /* This is a global offset table entry for a local symbol. */
4559 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4560 rel->r_addend, tls_type))
4561 return FALSE;
4562 break;
4563
4564 case R_PPC64_PLT16_HA:
4565 case R_PPC64_PLT16_HI:
4566 case R_PPC64_PLT16_LO:
4567 case R_PPC64_PLT32:
4568 case R_PPC64_PLT64:
4569 /* This symbol requires a procedure linkage table entry. We
4570 actually build the entry in adjust_dynamic_symbol,
4571 because this might be a case of linking PIC code without
4572 linking in any dynamic objects, in which case we don't
4573 need to generate a procedure linkage table after all. */
4574 if (h == NULL)
4575 {
4576 /* It does not make sense to have a procedure linkage
4577 table entry for a local symbol. */
4578 bfd_set_error (bfd_error_bad_value);
4579 return FALSE;
4580 }
4581 else
4582 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4583 rel->r_addend))
4584 return FALSE;
4585 break;
4586
4587 /* The following relocations don't need to propagate the
4588 relocation if linking a shared object since they are
4589 section relative. */
4590 case R_PPC64_SECTOFF:
4591 case R_PPC64_SECTOFF_LO:
4592 case R_PPC64_SECTOFF_HI:
4593 case R_PPC64_SECTOFF_HA:
4594 case R_PPC64_SECTOFF_DS:
4595 case R_PPC64_SECTOFF_LO_DS:
4596 case R_PPC64_DTPREL16:
4597 case R_PPC64_DTPREL16_LO:
4598 case R_PPC64_DTPREL16_HI:
4599 case R_PPC64_DTPREL16_HA:
4600 case R_PPC64_DTPREL16_DS:
4601 case R_PPC64_DTPREL16_LO_DS:
4602 case R_PPC64_DTPREL16_HIGHER:
4603 case R_PPC64_DTPREL16_HIGHERA:
4604 case R_PPC64_DTPREL16_HIGHEST:
4605 case R_PPC64_DTPREL16_HIGHESTA:
4606 break;
4607
4608 /* Nor do these. */
4609 case R_PPC64_TOC16:
4610 case R_PPC64_TOC16_LO:
4611 case R_PPC64_TOC16_HI:
4612 case R_PPC64_TOC16_HA:
4613 case R_PPC64_TOC16_DS:
4614 case R_PPC64_TOC16_LO_DS:
4615 sec->has_toc_reloc = 1;
4616 break;
4617
4618 /* This relocation describes the C++ object vtable hierarchy.
4619 Reconstruct it for later use during GC. */
4620 case R_PPC64_GNU_VTINHERIT:
4621 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4622 return FALSE;
4623 break;
4624
4625 /* This relocation describes which C++ vtable entries are actually
4626 used. Record for later use during GC. */
4627 case R_PPC64_GNU_VTENTRY:
4628 BFD_ASSERT (h != NULL);
4629 if (h != NULL
4630 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4631 return FALSE;
4632 break;
4633
4634 case R_PPC64_REL14:
4635 case R_PPC64_REL14_BRTAKEN:
4636 case R_PPC64_REL14_BRNTAKEN:
4637 {
4638 asection *dest = NULL;
4639
4640 /* Heuristic: If jumping outside our section, chances are
4641 we are going to need a stub. */
4642 if (h != NULL)
4643 {
4644 /* If the sym is weak it may be overridden later, so
4645 don't assume we know where a weak sym lives. */
4646 if (h->root.type == bfd_link_hash_defined)
4647 dest = h->root.u.def.section;
4648 }
4649 else
4650 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4651 sec, r_symndx);
4652 if (dest != sec)
4653 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4654 }
4655 /* Fall through. */
4656
4657 case R_PPC64_REL24:
4658 if (h != NULL)
4659 {
4660 /* We may need a .plt entry if the function this reloc
4661 refers to is in a shared lib. */
4662 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4663 rel->r_addend))
4664 return FALSE;
4665 if (h == &htab->tls_get_addr->elf
4666 || h == &htab->tls_get_addr_fd->elf)
4667 sec->has_tls_reloc = 1;
4668 else if (htab->tls_get_addr == NULL
4669 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4670 && (h->root.root.string[15] == 0
4671 || h->root.root.string[15] == '@'))
4672 {
4673 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4674 sec->has_tls_reloc = 1;
4675 }
4676 else if (htab->tls_get_addr_fd == NULL
4677 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4678 && (h->root.root.string[14] == 0
4679 || h->root.root.string[14] == '@'))
4680 {
4681 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4682 sec->has_tls_reloc = 1;
4683 }
4684 }
4685 break;
4686
4687 case R_PPC64_TPREL64:
4688 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4689 if (info->shared)
4690 info->flags |= DF_STATIC_TLS;
4691 goto dotlstoc;
4692
4693 case R_PPC64_DTPMOD64:
4694 if (rel + 1 < rel_end
4695 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4696 && rel[1].r_offset == rel->r_offset + 8)
4697 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4698 else
4699 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4700 goto dotlstoc;
4701
4702 case R_PPC64_DTPREL64:
4703 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4704 if (rel != relocs
4705 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4706 && rel[-1].r_offset == rel->r_offset - 8)
4707 /* This is the second reloc of a dtpmod, dtprel pair.
4708 Don't mark with TLS_DTPREL. */
4709 goto dodyn;
4710
4711 dotlstoc:
4712 sec->has_tls_reloc = 1;
4713 if (h != NULL)
4714 {
4715 struct ppc_link_hash_entry *eh;
4716 eh = (struct ppc_link_hash_entry *) h;
4717 eh->tls_mask |= tls_type;
4718 }
4719 else
4720 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4721 rel->r_addend, tls_type))
4722 return FALSE;
4723
4724 ppc64_sec = ppc64_elf_section_data (sec);
4725 if (ppc64_sec->sec_type != sec_toc)
4726 {
4727 /* One extra to simplify get_tls_mask. */
4728 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4729 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4730 if (ppc64_sec->u.t_symndx == NULL)
4731 return FALSE;
4732 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4733 ppc64_sec->sec_type = sec_toc;
4734 }
4735 BFD_ASSERT (rel->r_offset % 8 == 0);
4736 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4737
4738 /* Mark the second slot of a GD or LD entry.
4739 -1 to indicate GD and -2 to indicate LD. */
4740 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4741 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4742 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4743 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4744 goto dodyn;
4745
4746 case R_PPC64_TPREL16:
4747 case R_PPC64_TPREL16_LO:
4748 case R_PPC64_TPREL16_HI:
4749 case R_PPC64_TPREL16_HA:
4750 case R_PPC64_TPREL16_DS:
4751 case R_PPC64_TPREL16_LO_DS:
4752 case R_PPC64_TPREL16_HIGHER:
4753 case R_PPC64_TPREL16_HIGHERA:
4754 case R_PPC64_TPREL16_HIGHEST:
4755 case R_PPC64_TPREL16_HIGHESTA:
4756 if (info->shared)
4757 {
4758 info->flags |= DF_STATIC_TLS;
4759 goto dodyn;
4760 }
4761 break;
4762
4763 case R_PPC64_ADDR64:
4764 if (opd_sym_map != NULL
4765 && rel + 1 < rel_end
4766 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4767 {
4768 if (h != NULL)
4769 {
4770 if (h->root.root.string[0] == '.'
4771 && h->root.root.string[1] != 0
4772 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4773 ;
4774 else
4775 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4776 }
4777 else
4778 {
4779 asection *s;
4780
4781 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4782 r_symndx);
4783 if (s == NULL)
4784 return FALSE;
4785 else if (s != sec)
4786 opd_sym_map[rel->r_offset / 8] = s;
4787 }
4788 }
4789 /* Fall through. */
4790
4791 case R_PPC64_REL30:
4792 case R_PPC64_REL32:
4793 case R_PPC64_REL64:
4794 case R_PPC64_ADDR14:
4795 case R_PPC64_ADDR14_BRNTAKEN:
4796 case R_PPC64_ADDR14_BRTAKEN:
4797 case R_PPC64_ADDR16:
4798 case R_PPC64_ADDR16_DS:
4799 case R_PPC64_ADDR16_HA:
4800 case R_PPC64_ADDR16_HI:
4801 case R_PPC64_ADDR16_HIGHER:
4802 case R_PPC64_ADDR16_HIGHERA:
4803 case R_PPC64_ADDR16_HIGHEST:
4804 case R_PPC64_ADDR16_HIGHESTA:
4805 case R_PPC64_ADDR16_LO:
4806 case R_PPC64_ADDR16_LO_DS:
4807 case R_PPC64_ADDR24:
4808 case R_PPC64_ADDR32:
4809 case R_PPC64_UADDR16:
4810 case R_PPC64_UADDR32:
4811 case R_PPC64_UADDR64:
4812 case R_PPC64_TOC:
4813 if (h != NULL && !info->shared)
4814 /* We may need a copy reloc. */
4815 h->non_got_ref = 1;
4816
4817 /* Don't propagate .opd relocs. */
4818 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4819 break;
4820
4821 /* If we are creating a shared library, and this is a reloc
4822 against a global symbol, or a non PC relative reloc
4823 against a local symbol, then we need to copy the reloc
4824 into the shared library. However, if we are linking with
4825 -Bsymbolic, we do not need to copy a reloc against a
4826 global symbol which is defined in an object we are
4827 including in the link (i.e., DEF_REGULAR is set). At
4828 this point we have not seen all the input files, so it is
4829 possible that DEF_REGULAR is not set now but will be set
4830 later (it is never cleared). In case of a weak definition,
4831 DEF_REGULAR may be cleared later by a strong definition in
4832 a shared library. We account for that possibility below by
4833 storing information in the dyn_relocs field of the hash
4834 table entry. A similar situation occurs when creating
4835 shared libraries and symbol visibility changes render the
4836 symbol local.
4837
4838 If on the other hand, we are creating an executable, we
4839 may need to keep relocations for symbols satisfied by a
4840 dynamic library if we manage to avoid copy relocs for the
4841 symbol. */
4842 dodyn:
4843 if ((info->shared
4844 && (MUST_BE_DYN_RELOC (r_type)
4845 || (h != NULL
4846 && (! info->symbolic
4847 || h->root.type == bfd_link_hash_defweak
4848 || !h->def_regular))))
4849 || (ELIMINATE_COPY_RELOCS
4850 && !info->shared
4851 && h != NULL
4852 && (h->root.type == bfd_link_hash_defweak
4853 || !h->def_regular)))
4854 {
4855 struct ppc_dyn_relocs *p;
4856 struct ppc_dyn_relocs **head;
4857
4858 /* We must copy these reloc types into the output file.
4859 Create a reloc section in dynobj and make room for
4860 this reloc. */
4861 if (sreloc == NULL)
4862 {
4863 const char *name;
4864 bfd *dynobj;
4865
4866 name = (bfd_elf_string_from_elf_section
4867 (abfd,
4868 elf_elfheader (abfd)->e_shstrndx,
4869 elf_section_data (sec)->rel_hdr.sh_name));
4870 if (name == NULL)
4871 return FALSE;
4872
4873 if (! CONST_STRNEQ (name, ".rela")
4874 || strcmp (bfd_get_section_name (abfd, sec),
4875 name + 5) != 0)
4876 {
4877 (*_bfd_error_handler)
4878 (_("%B: bad relocation section name `%s\'"),
4879 abfd, name);
4880 bfd_set_error (bfd_error_bad_value);
4881 }
4882
4883 dynobj = htab->elf.dynobj;
4884 sreloc = bfd_get_section_by_name (dynobj, name);
4885 if (sreloc == NULL)
4886 {
4887 flagword flags;
4888
4889 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4890 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4891 | SEC_ALLOC | SEC_LOAD);
4892 sreloc = bfd_make_section_with_flags (dynobj,
4893 name,
4894 flags);
4895 if (sreloc == NULL
4896 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4897 return FALSE;
4898 }
4899 elf_section_data (sec)->sreloc = sreloc;
4900 }
4901
4902 /* If this is a global symbol, we count the number of
4903 relocations we need for this symbol. */
4904 if (h != NULL)
4905 {
4906 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4907 }
4908 else
4909 {
4910 /* Track dynamic relocs needed for local syms too.
4911 We really need local syms available to do this
4912 easily. Oh well. */
4913
4914 asection *s;
4915 void *vpp;
4916
4917 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4918 sec, r_symndx);
4919 if (s == NULL)
4920 return FALSE;
4921
4922 vpp = &elf_section_data (s)->local_dynrel;
4923 head = (struct ppc_dyn_relocs **) vpp;
4924 }
4925
4926 p = *head;
4927 if (p == NULL || p->sec != sec)
4928 {
4929 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4930 if (p == NULL)
4931 return FALSE;
4932 p->next = *head;
4933 *head = p;
4934 p->sec = sec;
4935 p->count = 0;
4936 p->pc_count = 0;
4937 }
4938
4939 p->count += 1;
4940 if (!MUST_BE_DYN_RELOC (r_type))
4941 p->pc_count += 1;
4942 }
4943 break;
4944
4945 default:
4946 break;
4947 }
4948 }
4949
4950 return TRUE;
4951 }
4952
4953 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4954 of the code entry point, and its section. */
4955
4956 static bfd_vma
4957 opd_entry_value (asection *opd_sec,
4958 bfd_vma offset,
4959 asection **code_sec,
4960 bfd_vma *code_off)
4961 {
4962 bfd *opd_bfd = opd_sec->owner;
4963 Elf_Internal_Rela *relocs;
4964 Elf_Internal_Rela *lo, *hi, *look;
4965 bfd_vma val;
4966
4967 /* No relocs implies we are linking a --just-symbols object. */
4968 if (opd_sec->reloc_count == 0)
4969 {
4970 bfd_vma val;
4971
4972 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4973 return (bfd_vma) -1;
4974
4975 if (code_sec != NULL)
4976 {
4977 asection *sec, *likely = NULL;
4978 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4979 if (sec->vma <= val
4980 && (sec->flags & SEC_LOAD) != 0
4981 && (sec->flags & SEC_ALLOC) != 0)
4982 likely = sec;
4983 if (likely != NULL)
4984 {
4985 *code_sec = likely;
4986 if (code_off != NULL)
4987 *code_off = val - likely->vma;
4988 }
4989 }
4990 return val;
4991 }
4992
4993 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4994 if (relocs == NULL)
4995 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4996
4997 /* Go find the opd reloc at the sym address. */
4998 lo = relocs;
4999 BFD_ASSERT (lo != NULL);
5000 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5001 val = (bfd_vma) -1;
5002 while (lo < hi)
5003 {
5004 look = lo + (hi - lo) / 2;
5005 if (look->r_offset < offset)
5006 lo = look + 1;
5007 else if (look->r_offset > offset)
5008 hi = look;
5009 else
5010 {
5011 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
5012 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5013 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5014 {
5015 unsigned long symndx = ELF64_R_SYM (look->r_info);
5016 asection *sec;
5017
5018 if (symndx < symtab_hdr->sh_info)
5019 {
5020 Elf_Internal_Sym *sym;
5021
5022 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5023 if (sym == NULL)
5024 {
5025 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5026 symtab_hdr->sh_info,
5027 0, NULL, NULL, NULL);
5028 if (sym == NULL)
5029 break;
5030 symtab_hdr->contents = (bfd_byte *) sym;
5031 }
5032
5033 sym += symndx;
5034 val = sym->st_value;
5035 sec = NULL;
5036 if ((sym->st_shndx != SHN_UNDEF
5037 && sym->st_shndx < SHN_LORESERVE)
5038 || sym->st_shndx > SHN_HIRESERVE)
5039 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5040 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5041 }
5042 else
5043 {
5044 struct elf_link_hash_entry **sym_hashes;
5045 struct elf_link_hash_entry *rh;
5046
5047 sym_hashes = elf_sym_hashes (opd_bfd);
5048 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5049 while (rh->root.type == bfd_link_hash_indirect
5050 || rh->root.type == bfd_link_hash_warning)
5051 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5052 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5053 || rh->root.type == bfd_link_hash_defweak);
5054 val = rh->root.u.def.value;
5055 sec = rh->root.u.def.section;
5056 }
5057 val += look->r_addend;
5058 if (code_off != NULL)
5059 *code_off = val;
5060 if (code_sec != NULL)
5061 *code_sec = sec;
5062 if (sec != NULL && sec->output_section != NULL)
5063 val += sec->output_section->vma + sec->output_offset;
5064 }
5065 break;
5066 }
5067 }
5068
5069 return val;
5070 }
5071
5072 /* Mark sections containing dynamically referenced symbols. When
5073 building shared libraries, we must assume that any visible symbol is
5074 referenced. */
5075
5076 static bfd_boolean
5077 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5078 {
5079 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5080 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5081
5082 if (eh->elf.root.type == bfd_link_hash_warning)
5083 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5084
5085 /* Dynamic linking info is on the func descriptor sym. */
5086 if (eh->oh != NULL
5087 && eh->oh->is_func_descriptor
5088 && (eh->oh->elf.root.type == bfd_link_hash_defined
5089 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5090 eh = eh->oh;
5091
5092 if ((eh->elf.root.type == bfd_link_hash_defined
5093 || eh->elf.root.type == bfd_link_hash_defweak)
5094 && (eh->elf.ref_dynamic
5095 || (!info->executable
5096 && eh->elf.def_regular
5097 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5098 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5099 {
5100 asection *code_sec;
5101
5102 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5103
5104 /* Function descriptor syms cause the associated
5105 function code sym section to be marked. */
5106 if (eh->is_func_descriptor
5107 && (eh->oh->elf.root.type == bfd_link_hash_defined
5108 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5109 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5110 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5111 && opd_entry_value (eh->elf.root.u.def.section,
5112 eh->elf.root.u.def.value,
5113 &code_sec, NULL) != (bfd_vma) -1)
5114 code_sec->flags |= SEC_KEEP;
5115 }
5116
5117 return TRUE;
5118 }
5119
5120 /* Return the section that should be marked against GC for a given
5121 relocation. */
5122
5123 static asection *
5124 ppc64_elf_gc_mark_hook (asection *sec,
5125 struct bfd_link_info *info,
5126 Elf_Internal_Rela *rel,
5127 struct elf_link_hash_entry *h,
5128 Elf_Internal_Sym *sym)
5129 {
5130 asection *rsec;
5131
5132 /* First mark all our entry sym sections. */
5133 if (info->gc_sym_list != NULL)
5134 {
5135 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5136 struct bfd_sym_chain *sym = info->gc_sym_list;
5137
5138 info->gc_sym_list = NULL;
5139 for (; sym != NULL; sym = sym->next)
5140 {
5141 struct ppc_link_hash_entry *eh;
5142
5143 eh = (struct ppc_link_hash_entry *)
5144 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5145 if (eh == NULL)
5146 continue;
5147 if (eh->elf.root.type != bfd_link_hash_defined
5148 && eh->elf.root.type != bfd_link_hash_defweak)
5149 continue;
5150
5151 if (eh->is_func_descriptor
5152 && (eh->oh->elf.root.type == bfd_link_hash_defined
5153 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5154 rsec = eh->oh->elf.root.u.def.section;
5155 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5156 && opd_entry_value (eh->elf.root.u.def.section,
5157 eh->elf.root.u.def.value,
5158 &rsec, NULL) != (bfd_vma) -1)
5159 ;
5160 else
5161 continue;
5162
5163 if (!rsec->gc_mark)
5164 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5165
5166 rsec = eh->elf.root.u.def.section;
5167 if (!rsec->gc_mark)
5168 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5169 }
5170 }
5171
5172 /* Syms return NULL if we're marking .opd, so we avoid marking all
5173 function sections, as all functions are referenced in .opd. */
5174 rsec = NULL;
5175 if (get_opd_info (sec) != NULL)
5176 return rsec;
5177
5178 if (h != NULL)
5179 {
5180 enum elf_ppc64_reloc_type r_type;
5181 struct ppc_link_hash_entry *eh;
5182
5183 r_type = ELF64_R_TYPE (rel->r_info);
5184 switch (r_type)
5185 {
5186 case R_PPC64_GNU_VTINHERIT:
5187 case R_PPC64_GNU_VTENTRY:
5188 break;
5189
5190 default:
5191 switch (h->root.type)
5192 {
5193 case bfd_link_hash_defined:
5194 case bfd_link_hash_defweak:
5195 eh = (struct ppc_link_hash_entry *) h;
5196 if (eh->oh != NULL
5197 && eh->oh->is_func_descriptor
5198 && (eh->oh->elf.root.type == bfd_link_hash_defined
5199 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5200 eh = eh->oh;
5201
5202 /* Function descriptor syms cause the associated
5203 function code sym section to be marked. */
5204 if (eh->is_func_descriptor
5205 && (eh->oh->elf.root.type == bfd_link_hash_defined
5206 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5207 {
5208 /* They also mark their opd section. */
5209 if (!eh->elf.root.u.def.section->gc_mark)
5210 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5211 ppc64_elf_gc_mark_hook);
5212
5213 rsec = eh->oh->elf.root.u.def.section;
5214 }
5215 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5216 && opd_entry_value (eh->elf.root.u.def.section,
5217 eh->elf.root.u.def.value,
5218 &rsec, NULL) != (bfd_vma) -1)
5219 {
5220 if (!eh->elf.root.u.def.section->gc_mark)
5221 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5222 ppc64_elf_gc_mark_hook);
5223 }
5224 else
5225 rsec = h->root.u.def.section;
5226 break;
5227
5228 case bfd_link_hash_common:
5229 rsec = h->root.u.c.p->section;
5230 break;
5231
5232 default:
5233 break;
5234 }
5235 }
5236 }
5237 else
5238 {
5239 asection **opd_sym_section;
5240
5241 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5242 opd_sym_section = get_opd_info (rsec);
5243 if (opd_sym_section != NULL)
5244 {
5245 if (!rsec->gc_mark)
5246 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5247
5248 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5249 }
5250 }
5251
5252 return rsec;
5253 }
5254
5255 /* Update the .got, .plt. and dynamic reloc reference counts for the
5256 section being removed. */
5257
5258 static bfd_boolean
5259 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5260 asection *sec, const Elf_Internal_Rela *relocs)
5261 {
5262 struct ppc_link_hash_table *htab;
5263 Elf_Internal_Shdr *symtab_hdr;
5264 struct elf_link_hash_entry **sym_hashes;
5265 struct got_entry **local_got_ents;
5266 const Elf_Internal_Rela *rel, *relend;
5267
5268 if (info->relocatable)
5269 return TRUE;
5270
5271 if ((sec->flags & SEC_ALLOC) == 0)
5272 return TRUE;
5273
5274 elf_section_data (sec)->local_dynrel = NULL;
5275
5276 htab = ppc_hash_table (info);
5277 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5278 sym_hashes = elf_sym_hashes (abfd);
5279 local_got_ents = elf_local_got_ents (abfd);
5280
5281 relend = relocs + sec->reloc_count;
5282 for (rel = relocs; rel < relend; rel++)
5283 {
5284 unsigned long r_symndx;
5285 enum elf_ppc64_reloc_type r_type;
5286 struct elf_link_hash_entry *h = NULL;
5287 char tls_type = 0;
5288
5289 r_symndx = ELF64_R_SYM (rel->r_info);
5290 r_type = ELF64_R_TYPE (rel->r_info);
5291 if (r_symndx >= symtab_hdr->sh_info)
5292 {
5293 struct ppc_link_hash_entry *eh;
5294 struct ppc_dyn_relocs **pp;
5295 struct ppc_dyn_relocs *p;
5296
5297 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5298 while (h->root.type == bfd_link_hash_indirect
5299 || h->root.type == bfd_link_hash_warning)
5300 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5301 eh = (struct ppc_link_hash_entry *) h;
5302
5303 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5304 if (p->sec == sec)
5305 {
5306 /* Everything must go for SEC. */
5307 *pp = p->next;
5308 break;
5309 }
5310 }
5311
5312 switch (r_type)
5313 {
5314 case R_PPC64_GOT_TLSLD16:
5315 case R_PPC64_GOT_TLSLD16_LO:
5316 case R_PPC64_GOT_TLSLD16_HI:
5317 case R_PPC64_GOT_TLSLD16_HA:
5318 tls_type = TLS_TLS | TLS_LD;
5319 goto dogot;
5320
5321 case R_PPC64_GOT_TLSGD16:
5322 case R_PPC64_GOT_TLSGD16_LO:
5323 case R_PPC64_GOT_TLSGD16_HI:
5324 case R_PPC64_GOT_TLSGD16_HA:
5325 tls_type = TLS_TLS | TLS_GD;
5326 goto dogot;
5327
5328 case R_PPC64_GOT_TPREL16_DS:
5329 case R_PPC64_GOT_TPREL16_LO_DS:
5330 case R_PPC64_GOT_TPREL16_HI:
5331 case R_PPC64_GOT_TPREL16_HA:
5332 tls_type = TLS_TLS | TLS_TPREL;
5333 goto dogot;
5334
5335 case R_PPC64_GOT_DTPREL16_DS:
5336 case R_PPC64_GOT_DTPREL16_LO_DS:
5337 case R_PPC64_GOT_DTPREL16_HI:
5338 case R_PPC64_GOT_DTPREL16_HA:
5339 tls_type = TLS_TLS | TLS_DTPREL;
5340 goto dogot;
5341
5342 case R_PPC64_GOT16:
5343 case R_PPC64_GOT16_DS:
5344 case R_PPC64_GOT16_HA:
5345 case R_PPC64_GOT16_HI:
5346 case R_PPC64_GOT16_LO:
5347 case R_PPC64_GOT16_LO_DS:
5348 dogot:
5349 {
5350 struct got_entry *ent;
5351
5352 if (h != NULL)
5353 ent = h->got.glist;
5354 else
5355 ent = local_got_ents[r_symndx];
5356
5357 for (; ent != NULL; ent = ent->next)
5358 if (ent->addend == rel->r_addend
5359 && ent->owner == abfd
5360 && ent->tls_type == tls_type)
5361 break;
5362 if (ent == NULL)
5363 abort ();
5364 if (ent->got.refcount > 0)
5365 ent->got.refcount -= 1;
5366 }
5367 break;
5368
5369 case R_PPC64_PLT16_HA:
5370 case R_PPC64_PLT16_HI:
5371 case R_PPC64_PLT16_LO:
5372 case R_PPC64_PLT32:
5373 case R_PPC64_PLT64:
5374 case R_PPC64_REL14:
5375 case R_PPC64_REL14_BRNTAKEN:
5376 case R_PPC64_REL14_BRTAKEN:
5377 case R_PPC64_REL24:
5378 if (h != NULL)
5379 {
5380 struct plt_entry *ent;
5381
5382 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5383 if (ent->addend == rel->r_addend)
5384 break;
5385 if (ent == NULL)
5386 abort ();
5387 if (ent->plt.refcount > 0)
5388 ent->plt.refcount -= 1;
5389 }
5390 break;
5391
5392 default:
5393 break;
5394 }
5395 }
5396 return TRUE;
5397 }
5398
5399 /* The maximum size of .sfpr. */
5400 #define SFPR_MAX (218*4)
5401
5402 struct sfpr_def_parms
5403 {
5404 const char name[12];
5405 unsigned char lo, hi;
5406 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5407 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5408 };
5409
5410 /* Auto-generate _save*, _rest* functions in .sfpr. */
5411
5412 static unsigned int
5413 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5414 {
5415 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5416 unsigned int i;
5417 size_t len = strlen (parm->name);
5418 bfd_boolean writing = FALSE;
5419 char sym[16];
5420
5421 memcpy (sym, parm->name, len);
5422 sym[len + 2] = 0;
5423
5424 for (i = parm->lo; i <= parm->hi; i++)
5425 {
5426 struct elf_link_hash_entry *h;
5427
5428 sym[len + 0] = i / 10 + '0';
5429 sym[len + 1] = i % 10 + '0';
5430 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5431 if (h != NULL
5432 && !h->def_regular)
5433 {
5434 h->root.type = bfd_link_hash_defined;
5435 h->root.u.def.section = htab->sfpr;
5436 h->root.u.def.value = htab->sfpr->size;
5437 h->type = STT_FUNC;
5438 h->def_regular = 1;
5439 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5440 writing = TRUE;
5441 if (htab->sfpr->contents == NULL)
5442 {
5443 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5444 if (htab->sfpr->contents == NULL)
5445 return FALSE;
5446 }
5447 }
5448 if (writing)
5449 {
5450 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5451 if (i != parm->hi)
5452 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5453 else
5454 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5455 htab->sfpr->size = p - htab->sfpr->contents;
5456 }
5457 }
5458
5459 return TRUE;
5460 }
5461
5462 static bfd_byte *
5463 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5464 {
5465 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5466 return p + 4;
5467 }
5468
5469 static bfd_byte *
5470 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5471 {
5472 p = savegpr0 (abfd, p, r);
5473 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5474 p = p + 4;
5475 bfd_put_32 (abfd, BLR, p);
5476 return p + 4;
5477 }
5478
5479 static bfd_byte *
5480 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5481 {
5482 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5483 return p + 4;
5484 }
5485
5486 static bfd_byte *
5487 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5488 {
5489 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5490 p = p + 4;
5491 p = restgpr0 (abfd, p, r);
5492 bfd_put_32 (abfd, MTLR_R0, p);
5493 p = p + 4;
5494 if (r == 29)
5495 {
5496 p = restgpr0 (abfd, p, 30);
5497 p = restgpr0 (abfd, p, 31);
5498 }
5499 bfd_put_32 (abfd, BLR, p);
5500 return p + 4;
5501 }
5502
5503 static bfd_byte *
5504 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5505 {
5506 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5507 return p + 4;
5508 }
5509
5510 static bfd_byte *
5511 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5512 {
5513 p = savegpr1 (abfd, p, r);
5514 bfd_put_32 (abfd, BLR, p);
5515 return p + 4;
5516 }
5517
5518 static bfd_byte *
5519 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5520 {
5521 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5522 return p + 4;
5523 }
5524
5525 static bfd_byte *
5526 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5527 {
5528 p = restgpr1 (abfd, p, r);
5529 bfd_put_32 (abfd, BLR, p);
5530 return p + 4;
5531 }
5532
5533 static bfd_byte *
5534 savefpr (bfd *abfd, bfd_byte *p, int r)
5535 {
5536 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5537 return p + 4;
5538 }
5539
5540 static bfd_byte *
5541 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5542 {
5543 p = savefpr (abfd, p, r);
5544 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5545 p = p + 4;
5546 bfd_put_32 (abfd, BLR, p);
5547 return p + 4;
5548 }
5549
5550 static bfd_byte *
5551 restfpr (bfd *abfd, bfd_byte *p, int r)
5552 {
5553 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5554 return p + 4;
5555 }
5556
5557 static bfd_byte *
5558 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5559 {
5560 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5561 p = p + 4;
5562 p = restfpr (abfd, p, r);
5563 bfd_put_32 (abfd, MTLR_R0, p);
5564 p = p + 4;
5565 if (r == 29)
5566 {
5567 p = restfpr (abfd, p, 30);
5568 p = restfpr (abfd, p, 31);
5569 }
5570 bfd_put_32 (abfd, BLR, p);
5571 return p + 4;
5572 }
5573
5574 static bfd_byte *
5575 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5576 {
5577 p = savefpr (abfd, p, r);
5578 bfd_put_32 (abfd, BLR, p);
5579 return p + 4;
5580 }
5581
5582 static bfd_byte *
5583 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5584 {
5585 p = restfpr (abfd, p, r);
5586 bfd_put_32 (abfd, BLR, p);
5587 return p + 4;
5588 }
5589
5590 static bfd_byte *
5591 savevr (bfd *abfd, bfd_byte *p, int r)
5592 {
5593 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5594 p = p + 4;
5595 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5596 return p + 4;
5597 }
5598
5599 static bfd_byte *
5600 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5601 {
5602 p = savevr (abfd, p, r);
5603 bfd_put_32 (abfd, BLR, p);
5604 return p + 4;
5605 }
5606
5607 static bfd_byte *
5608 restvr (bfd *abfd, bfd_byte *p, int r)
5609 {
5610 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5611 p = p + 4;
5612 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5613 return p + 4;
5614 }
5615
5616 static bfd_byte *
5617 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5618 {
5619 p = restvr (abfd, p, r);
5620 bfd_put_32 (abfd, BLR, p);
5621 return p + 4;
5622 }
5623
5624 /* Called via elf_link_hash_traverse to transfer dynamic linking
5625 information on function code symbol entries to their corresponding
5626 function descriptor symbol entries. */
5627
5628 static bfd_boolean
5629 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5630 {
5631 struct bfd_link_info *info;
5632 struct ppc_link_hash_table *htab;
5633 struct plt_entry *ent;
5634 struct ppc_link_hash_entry *fh;
5635 struct ppc_link_hash_entry *fdh;
5636 bfd_boolean force_local;
5637
5638 fh = (struct ppc_link_hash_entry *) h;
5639 if (fh->elf.root.type == bfd_link_hash_indirect)
5640 return TRUE;
5641
5642 if (fh->elf.root.type == bfd_link_hash_warning)
5643 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5644
5645 info = inf;
5646 htab = ppc_hash_table (info);
5647
5648 /* Resolve undefined references to dot-symbols as the value
5649 in the function descriptor, if we have one in a regular object.
5650 This is to satisfy cases like ".quad .foo". Calls to functions
5651 in dynamic objects are handled elsewhere. */
5652 if (fh->elf.root.type == bfd_link_hash_undefweak
5653 && fh->was_undefined
5654 && (fh->oh->elf.root.type == bfd_link_hash_defined
5655 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5656 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5657 && opd_entry_value (fh->oh->elf.root.u.def.section,
5658 fh->oh->elf.root.u.def.value,
5659 &fh->elf.root.u.def.section,
5660 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5661 {
5662 fh->elf.root.type = fh->oh->elf.root.type;
5663 fh->elf.forced_local = 1;
5664 fh->elf.def_regular = fh->oh->elf.def_regular;
5665 fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
5666 }
5667
5668 /* If this is a function code symbol, transfer dynamic linking
5669 information to the function descriptor symbol. */
5670 if (!fh->is_func)
5671 return TRUE;
5672
5673 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5674 if (ent->plt.refcount > 0)
5675 break;
5676 if (ent == NULL
5677 || fh->elf.root.root.string[0] != '.'
5678 || fh->elf.root.root.string[1] == '\0')
5679 return TRUE;
5680
5681 /* Find the corresponding function descriptor symbol. Create it
5682 as undefined if necessary. */
5683
5684 fdh = get_fdh (fh, htab);
5685 if (fdh != NULL)
5686 while (fdh->elf.root.type == bfd_link_hash_indirect
5687 || fdh->elf.root.type == bfd_link_hash_warning)
5688 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5689
5690 if (fdh == NULL
5691 && info->shared
5692 && (fh->elf.root.type == bfd_link_hash_undefined
5693 || fh->elf.root.type == bfd_link_hash_undefweak))
5694 {
5695 fdh = make_fdh (info, fh);
5696 if (fdh == NULL)
5697 return FALSE;
5698 }
5699
5700 /* Fake function descriptors are made undefweak. If the function
5701 code symbol is strong undefined, make the fake sym the same.
5702 If the function code symbol is defined, then force the fake
5703 descriptor local; We can't support overriding of symbols in a
5704 shared library on a fake descriptor. */
5705
5706 if (fdh != NULL
5707 && fdh->fake
5708 && fdh->elf.root.type == bfd_link_hash_undefweak)
5709 {
5710 if (fh->elf.root.type == bfd_link_hash_undefined)
5711 {
5712 fdh->elf.root.type = bfd_link_hash_undefined;
5713 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5714 }
5715 else if (fh->elf.root.type == bfd_link_hash_defined
5716 || fh->elf.root.type == bfd_link_hash_defweak)
5717 {
5718 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5719 }
5720 }
5721
5722 if (fdh != NULL
5723 && !fdh->elf.forced_local
5724 && (info->shared
5725 || fdh->elf.def_dynamic
5726 || fdh->elf.ref_dynamic
5727 || (fdh->elf.root.type == bfd_link_hash_undefweak
5728 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5729 {
5730 if (fdh->elf.dynindx == -1)
5731 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5732 return FALSE;
5733 fdh->elf.ref_regular |= fh->elf.ref_regular;
5734 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5735 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5736 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5737 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5738 {
5739 move_plt_plist (fh, fdh);
5740 fdh->elf.needs_plt = 1;
5741 }
5742 fdh->is_func_descriptor = 1;
5743 fdh->oh = fh;
5744 fh->oh = fdh;
5745 }
5746
5747 /* Now that the info is on the function descriptor, clear the
5748 function code sym info. Any function code syms for which we
5749 don't have a definition in a regular file, we force local.
5750 This prevents a shared library from exporting syms that have
5751 been imported from another library. Function code syms that
5752 are really in the library we must leave global to prevent the
5753 linker dragging in a definition from a static library. */
5754 force_local = (!fh->elf.def_regular
5755 || fdh == NULL
5756 || !fdh->elf.def_regular
5757 || fdh->elf.forced_local);
5758 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5759
5760 return TRUE;
5761 }
5762
5763 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5764 this hook to a) provide some gcc support functions, and b) transfer
5765 dynamic linking information gathered so far on function code symbol
5766 entries, to their corresponding function descriptor symbol entries. */
5767
5768 static bfd_boolean
5769 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5770 struct bfd_link_info *info)
5771 {
5772 struct ppc_link_hash_table *htab;
5773 unsigned int i;
5774 const struct sfpr_def_parms funcs[] =
5775 {
5776 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5777 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5778 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5779 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5780 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5781 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5782 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5783 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5784 { "._savef", 14, 31, savefpr, savefpr1_tail },
5785 { "._restf", 14, 31, restfpr, restfpr1_tail },
5786 { "_savevr_", 20, 31, savevr, savevr_tail },
5787 { "_restvr_", 20, 31, restvr, restvr_tail }
5788 };
5789
5790 htab = ppc_hash_table (info);
5791 if (htab->sfpr == NULL)
5792 /* We don't have any relocs. */
5793 return TRUE;
5794
5795 /* Provide any missing _save* and _rest* functions. */
5796 htab->sfpr->size = 0;
5797 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5798 if (!sfpr_define (info, &funcs[i]))
5799 return FALSE;
5800
5801 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5802
5803 if (htab->sfpr->size == 0)
5804 htab->sfpr->flags |= SEC_EXCLUDE;
5805
5806 return TRUE;
5807 }
5808
5809 /* Adjust a symbol defined by a dynamic object and referenced by a
5810 regular object. The current definition is in some section of the
5811 dynamic object, but we're not including those sections. We have to
5812 change the definition to something the rest of the link can
5813 understand. */
5814
5815 static bfd_boolean
5816 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5817 struct elf_link_hash_entry *h)
5818 {
5819 struct ppc_link_hash_table *htab;
5820 asection *s;
5821
5822 htab = ppc_hash_table (info);
5823
5824 /* Deal with function syms. */
5825 if (h->type == STT_FUNC
5826 || h->needs_plt)
5827 {
5828 /* Clear procedure linkage table information for any symbol that
5829 won't need a .plt entry. */
5830 struct plt_entry *ent;
5831 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5832 if (ent->plt.refcount > 0)
5833 break;
5834 if (ent == NULL
5835 || SYMBOL_CALLS_LOCAL (info, h)
5836 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5837 && h->root.type == bfd_link_hash_undefweak))
5838 {
5839 h->plt.plist = NULL;
5840 h->needs_plt = 0;
5841 }
5842 }
5843 else
5844 h->plt.plist = NULL;
5845
5846 /* If this is a weak symbol, and there is a real definition, the
5847 processor independent code will have arranged for us to see the
5848 real definition first, and we can just use the same value. */
5849 if (h->u.weakdef != NULL)
5850 {
5851 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5852 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5853 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5854 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5855 if (ELIMINATE_COPY_RELOCS)
5856 h->non_got_ref = h->u.weakdef->non_got_ref;
5857 return TRUE;
5858 }
5859
5860 /* If we are creating a shared library, we must presume that the
5861 only references to the symbol are via the global offset table.
5862 For such cases we need not do anything here; the relocations will
5863 be handled correctly by relocate_section. */
5864 if (info->shared)
5865 return TRUE;
5866
5867 /* If there are no references to this symbol that do not use the
5868 GOT, we don't need to generate a copy reloc. */
5869 if (!h->non_got_ref)
5870 return TRUE;
5871
5872 /* Don't generate a copy reloc for symbols defined in the executable. */
5873 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
5874 return TRUE;
5875
5876 if (ELIMINATE_COPY_RELOCS)
5877 {
5878 struct ppc_link_hash_entry * eh;
5879 struct ppc_dyn_relocs *p;
5880
5881 eh = (struct ppc_link_hash_entry *) h;
5882 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5883 {
5884 s = p->sec->output_section;
5885 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5886 break;
5887 }
5888
5889 /* If we didn't find any dynamic relocs in read-only sections, then
5890 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5891 if (p == NULL)
5892 {
5893 h->non_got_ref = 0;
5894 return TRUE;
5895 }
5896 }
5897
5898 if (h->plt.plist != NULL)
5899 {
5900 /* We should never get here, but unfortunately there are versions
5901 of gcc out there that improperly (for this ABI) put initialized
5902 function pointers, vtable refs and suchlike in read-only
5903 sections. Allow them to proceed, but warn that this might
5904 break at runtime. */
5905 (*_bfd_error_handler)
5906 (_("copy reloc against `%s' requires lazy plt linking; "
5907 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5908 h->root.root.string);
5909 }
5910
5911 /* This is a reference to a symbol defined by a dynamic object which
5912 is not a function. */
5913
5914 if (h->size == 0)
5915 {
5916 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5917 h->root.root.string);
5918 return TRUE;
5919 }
5920
5921 /* We must allocate the symbol in our .dynbss section, which will
5922 become part of the .bss section of the executable. There will be
5923 an entry for this symbol in the .dynsym section. The dynamic
5924 object will contain position independent code, so all references
5925 from the dynamic object to this symbol will go through the global
5926 offset table. The dynamic linker will use the .dynsym entry to
5927 determine the address it must put in the global offset table, so
5928 both the dynamic object and the regular object will refer to the
5929 same memory location for the variable. */
5930
5931 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5932 to copy the initial value out of the dynamic object and into the
5933 runtime process image. We need to remember the offset into the
5934 .rela.bss section we are going to use. */
5935 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5936 {
5937 htab->relbss->size += sizeof (Elf64_External_Rela);
5938 h->needs_copy = 1;
5939 }
5940
5941 s = htab->dynbss;
5942
5943 return _bfd_elf_adjust_dynamic_copy (h, s);
5944 }
5945
5946 /* If given a function descriptor symbol, hide both the function code
5947 sym and the descriptor. */
5948 static void
5949 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5950 struct elf_link_hash_entry *h,
5951 bfd_boolean force_local)
5952 {
5953 struct ppc_link_hash_entry *eh;
5954 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5955
5956 eh = (struct ppc_link_hash_entry *) h;
5957 if (eh->is_func_descriptor)
5958 {
5959 struct ppc_link_hash_entry *fh = eh->oh;
5960
5961 if (fh == NULL)
5962 {
5963 const char *p, *q;
5964 struct ppc_link_hash_table *htab;
5965 char save;
5966
5967 /* We aren't supposed to use alloca in BFD because on
5968 systems which do not have alloca the version in libiberty
5969 calls xmalloc, which might cause the program to crash
5970 when it runs out of memory. This function doesn't have a
5971 return status, so there's no way to gracefully return an
5972 error. So cheat. We know that string[-1] can be safely
5973 accessed; It's either a string in an ELF string table,
5974 or allocated in an objalloc structure. */
5975
5976 p = eh->elf.root.root.string - 1;
5977 save = *p;
5978 *(char *) p = '.';
5979 htab = ppc_hash_table (info);
5980 fh = (struct ppc_link_hash_entry *)
5981 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5982 *(char *) p = save;
5983
5984 /* Unfortunately, if it so happens that the string we were
5985 looking for was allocated immediately before this string,
5986 then we overwrote the string terminator. That's the only
5987 reason the lookup should fail. */
5988 if (fh == NULL)
5989 {
5990 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5991 while (q >= eh->elf.root.root.string && *q == *p)
5992 --q, --p;
5993 if (q < eh->elf.root.root.string && *p == '.')
5994 fh = (struct ppc_link_hash_entry *)
5995 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5996 }
5997 if (fh != NULL)
5998 {
5999 eh->oh = fh;
6000 fh->oh = eh;
6001 }
6002 }
6003 if (fh != NULL)
6004 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6005 }
6006 }
6007
6008 static bfd_boolean
6009 get_sym_h (struct elf_link_hash_entry **hp,
6010 Elf_Internal_Sym **symp,
6011 asection **symsecp,
6012 char **tls_maskp,
6013 Elf_Internal_Sym **locsymsp,
6014 unsigned long r_symndx,
6015 bfd *ibfd)
6016 {
6017 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6018
6019 if (r_symndx >= symtab_hdr->sh_info)
6020 {
6021 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6022 struct elf_link_hash_entry *h;
6023
6024 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6025 while (h->root.type == bfd_link_hash_indirect
6026 || h->root.type == bfd_link_hash_warning)
6027 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6028
6029 if (hp != NULL)
6030 *hp = h;
6031
6032 if (symp != NULL)
6033 *symp = NULL;
6034
6035 if (symsecp != NULL)
6036 {
6037 asection *symsec = NULL;
6038 if (h->root.type == bfd_link_hash_defined
6039 || h->root.type == bfd_link_hash_defweak)
6040 symsec = h->root.u.def.section;
6041 *symsecp = symsec;
6042 }
6043
6044 if (tls_maskp != NULL)
6045 {
6046 struct ppc_link_hash_entry *eh;
6047
6048 eh = (struct ppc_link_hash_entry *) h;
6049 *tls_maskp = &eh->tls_mask;
6050 }
6051 }
6052 else
6053 {
6054 Elf_Internal_Sym *sym;
6055 Elf_Internal_Sym *locsyms = *locsymsp;
6056
6057 if (locsyms == NULL)
6058 {
6059 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6060 if (locsyms == NULL)
6061 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6062 symtab_hdr->sh_info,
6063 0, NULL, NULL, NULL);
6064 if (locsyms == NULL)
6065 return FALSE;
6066 *locsymsp = locsyms;
6067 }
6068 sym = locsyms + r_symndx;
6069
6070 if (hp != NULL)
6071 *hp = NULL;
6072
6073 if (symp != NULL)
6074 *symp = sym;
6075
6076 if (symsecp != NULL)
6077 {
6078 asection *symsec = NULL;
6079 if ((sym->st_shndx != SHN_UNDEF
6080 && sym->st_shndx < SHN_LORESERVE)
6081 || sym->st_shndx > SHN_HIRESERVE)
6082 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6083 *symsecp = symsec;
6084 }
6085
6086 if (tls_maskp != NULL)
6087 {
6088 struct got_entry **lgot_ents;
6089 char *tls_mask;
6090
6091 tls_mask = NULL;
6092 lgot_ents = elf_local_got_ents (ibfd);
6093 if (lgot_ents != NULL)
6094 {
6095 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6096 tls_mask = &lgot_masks[r_symndx];
6097 }
6098 *tls_maskp = tls_mask;
6099 }
6100 }
6101 return TRUE;
6102 }
6103
6104 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6105 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6106 type suitable for optimization, and 1 otherwise. */
6107
6108 static int
6109 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6110 Elf_Internal_Sym **locsymsp,
6111 const Elf_Internal_Rela *rel, bfd *ibfd)
6112 {
6113 unsigned long r_symndx;
6114 int next_r;
6115 struct elf_link_hash_entry *h;
6116 Elf_Internal_Sym *sym;
6117 asection *sec;
6118 bfd_vma off;
6119
6120 r_symndx = ELF64_R_SYM (rel->r_info);
6121 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6122 return 0;
6123
6124 if ((*tls_maskp != NULL && **tls_maskp != 0)
6125 || sec == NULL
6126 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6127 return 1;
6128
6129 /* Look inside a TOC section too. */
6130 if (h != NULL)
6131 {
6132 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6133 off = h->root.u.def.value;
6134 }
6135 else
6136 off = sym->st_value;
6137 off += rel->r_addend;
6138 BFD_ASSERT (off % 8 == 0);
6139 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6140 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6141 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6142 return 0;
6143 if (toc_symndx != NULL)
6144 *toc_symndx = r_symndx;
6145 if ((h == NULL
6146 || ((h->root.type == bfd_link_hash_defined
6147 || h->root.type == bfd_link_hash_defweak)
6148 && !h->def_dynamic))
6149 && (next_r == -1 || next_r == -2))
6150 return 1 - next_r;
6151 return 1;
6152 }
6153
6154 /* Adjust all global syms defined in opd sections. In gcc generated
6155 code for the old ABI, these will already have been done. */
6156
6157 static bfd_boolean
6158 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6159 {
6160 struct ppc_link_hash_entry *eh;
6161 asection *sym_sec;
6162 long *opd_adjust;
6163
6164 if (h->root.type == bfd_link_hash_indirect)
6165 return TRUE;
6166
6167 if (h->root.type == bfd_link_hash_warning)
6168 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6169
6170 if (h->root.type != bfd_link_hash_defined
6171 && h->root.type != bfd_link_hash_defweak)
6172 return TRUE;
6173
6174 eh = (struct ppc_link_hash_entry *) h;
6175 if (eh->adjust_done)
6176 return TRUE;
6177
6178 sym_sec = eh->elf.root.u.def.section;
6179 opd_adjust = get_opd_info (sym_sec);
6180 if (opd_adjust != NULL)
6181 {
6182 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6183 if (adjust == -1)
6184 {
6185 /* This entry has been deleted. */
6186 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6187 if (dsec == NULL)
6188 {
6189 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6190 if (elf_discarded_section (dsec))
6191 {
6192 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6193 break;
6194 }
6195 }
6196 eh->elf.root.u.def.value = 0;
6197 eh->elf.root.u.def.section = dsec;
6198 }
6199 else
6200 eh->elf.root.u.def.value += adjust;
6201 eh->adjust_done = 1;
6202 }
6203 return TRUE;
6204 }
6205
6206 /* Handles decrementing dynamic reloc counts for the reloc specified by
6207 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6208 have already been determined. */
6209
6210 static bfd_boolean
6211 dec_dynrel_count (bfd_vma r_info,
6212 asection *sec,
6213 struct bfd_link_info *info,
6214 Elf_Internal_Sym **local_syms,
6215 struct elf_link_hash_entry *h,
6216 asection *sym_sec)
6217 {
6218 enum elf_ppc64_reloc_type r_type;
6219 struct ppc_dyn_relocs *p;
6220 struct ppc_dyn_relocs **pp;
6221
6222 /* Can this reloc be dynamic? This switch, and later tests here
6223 should be kept in sync with the code in check_relocs. */
6224 r_type = ELF64_R_TYPE (r_info);
6225 switch (r_type)
6226 {
6227 default:
6228 return TRUE;
6229
6230 case R_PPC64_TPREL16:
6231 case R_PPC64_TPREL16_LO:
6232 case R_PPC64_TPREL16_HI:
6233 case R_PPC64_TPREL16_HA:
6234 case R_PPC64_TPREL16_DS:
6235 case R_PPC64_TPREL16_LO_DS:
6236 case R_PPC64_TPREL16_HIGHER:
6237 case R_PPC64_TPREL16_HIGHERA:
6238 case R_PPC64_TPREL16_HIGHEST:
6239 case R_PPC64_TPREL16_HIGHESTA:
6240 if (!info->shared)
6241 return TRUE;
6242
6243 case R_PPC64_TPREL64:
6244 case R_PPC64_DTPMOD64:
6245 case R_PPC64_DTPREL64:
6246 case R_PPC64_ADDR64:
6247 case R_PPC64_REL30:
6248 case R_PPC64_REL32:
6249 case R_PPC64_REL64:
6250 case R_PPC64_ADDR14:
6251 case R_PPC64_ADDR14_BRNTAKEN:
6252 case R_PPC64_ADDR14_BRTAKEN:
6253 case R_PPC64_ADDR16:
6254 case R_PPC64_ADDR16_DS:
6255 case R_PPC64_ADDR16_HA:
6256 case R_PPC64_ADDR16_HI:
6257 case R_PPC64_ADDR16_HIGHER:
6258 case R_PPC64_ADDR16_HIGHERA:
6259 case R_PPC64_ADDR16_HIGHEST:
6260 case R_PPC64_ADDR16_HIGHESTA:
6261 case R_PPC64_ADDR16_LO:
6262 case R_PPC64_ADDR16_LO_DS:
6263 case R_PPC64_ADDR24:
6264 case R_PPC64_ADDR32:
6265 case R_PPC64_UADDR16:
6266 case R_PPC64_UADDR32:
6267 case R_PPC64_UADDR64:
6268 case R_PPC64_TOC:
6269 break;
6270 }
6271
6272 if (local_syms != NULL)
6273 {
6274 unsigned long r_symndx;
6275 Elf_Internal_Sym *sym;
6276 bfd *ibfd = sec->owner;
6277
6278 r_symndx = ELF64_R_SYM (r_info);
6279 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6280 return FALSE;
6281 }
6282
6283 if ((info->shared
6284 && (MUST_BE_DYN_RELOC (r_type)
6285 || (h != NULL
6286 && (!info->symbolic
6287 || h->root.type == bfd_link_hash_defweak
6288 || !h->def_regular))))
6289 || (ELIMINATE_COPY_RELOCS
6290 && !info->shared
6291 && h != NULL
6292 && (h->root.type == bfd_link_hash_defweak
6293 || !h->def_regular)))
6294 ;
6295 else
6296 return TRUE;
6297
6298 if (h != NULL)
6299 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6300 else
6301 {
6302 if (sym_sec != NULL)
6303 {
6304 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6305 pp = (struct ppc_dyn_relocs **) vpp;
6306 }
6307 else
6308 {
6309 void *vpp = &elf_section_data (sec)->local_dynrel;
6310 pp = (struct ppc_dyn_relocs **) vpp;
6311 }
6312
6313 /* elf_gc_sweep may have already removed all dyn relocs associated
6314 with local syms for a given section. Don't report a dynreloc
6315 miscount. */
6316 if (*pp == NULL)
6317 return TRUE;
6318 }
6319
6320 while ((p = *pp) != NULL)
6321 {
6322 if (p->sec == sec)
6323 {
6324 if (!MUST_BE_DYN_RELOC (r_type))
6325 p->pc_count -= 1;
6326 p->count -= 1;
6327 if (p->count == 0)
6328 *pp = p->next;
6329 return TRUE;
6330 }
6331 pp = &p->next;
6332 }
6333
6334 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6335 sec->owner, sec);
6336 bfd_set_error (bfd_error_bad_value);
6337 return FALSE;
6338 }
6339
6340 /* Remove unused Official Procedure Descriptor entries. Currently we
6341 only remove those associated with functions in discarded link-once
6342 sections, or weakly defined functions that have been overridden. It
6343 would be possible to remove many more entries for statically linked
6344 applications. */
6345
6346 bfd_boolean
6347 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6348 bfd_boolean no_opd_opt,
6349 bfd_boolean non_overlapping)
6350 {
6351 bfd *ibfd;
6352 bfd_boolean some_edited = FALSE;
6353 asection *need_pad = NULL;
6354
6355 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6356 {
6357 asection *sec;
6358 Elf_Internal_Rela *relstart, *rel, *relend;
6359 Elf_Internal_Shdr *symtab_hdr;
6360 Elf_Internal_Sym *local_syms;
6361 struct elf_link_hash_entry **sym_hashes;
6362 bfd_vma offset;
6363 bfd_size_type amt;
6364 long *opd_adjust;
6365 bfd_boolean need_edit, add_aux_fields;
6366 bfd_size_type cnt_16b = 0;
6367
6368 sec = bfd_get_section_by_name (ibfd, ".opd");
6369 if (sec == NULL || sec->size == 0)
6370 continue;
6371
6372 amt = sec->size * sizeof (long) / 8;
6373 opd_adjust = get_opd_info (sec);
6374 if (opd_adjust == NULL)
6375 {
6376 /* check_relocs hasn't been called. Must be a ld -r link
6377 or --just-symbols object. */
6378 opd_adjust = bfd_alloc (obfd, amt);
6379 if (opd_adjust == NULL)
6380 return FALSE;
6381 ppc64_elf_section_data (sec)->u.opd_adjust = opd_adjust;
6382 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
6383 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6384 }
6385 memset (opd_adjust, 0, amt);
6386
6387 if (no_opd_opt)
6388 continue;
6389
6390 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6391 continue;
6392
6393 if (sec->output_section == bfd_abs_section_ptr)
6394 continue;
6395
6396 /* Look through the section relocs. */
6397 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6398 continue;
6399
6400 local_syms = NULL;
6401 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6402 sym_hashes = elf_sym_hashes (ibfd);
6403
6404 /* Read the relocations. */
6405 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6406 info->keep_memory);
6407 if (relstart == NULL)
6408 return FALSE;
6409
6410 /* First run through the relocs to check they are sane, and to
6411 determine whether we need to edit this opd section. */
6412 need_edit = FALSE;
6413 need_pad = sec;
6414 offset = 0;
6415 relend = relstart + sec->reloc_count;
6416 for (rel = relstart; rel < relend; )
6417 {
6418 enum elf_ppc64_reloc_type r_type;
6419 unsigned long r_symndx;
6420 asection *sym_sec;
6421 struct elf_link_hash_entry *h;
6422 Elf_Internal_Sym *sym;
6423
6424 /* .opd contains a regular array of 16 or 24 byte entries. We're
6425 only interested in the reloc pointing to a function entry
6426 point. */
6427 if (rel->r_offset != offset
6428 || rel + 1 >= relend
6429 || (rel + 1)->r_offset != offset + 8)
6430 {
6431 /* If someone messes with .opd alignment then after a
6432 "ld -r" we might have padding in the middle of .opd.
6433 Also, there's nothing to prevent someone putting
6434 something silly in .opd with the assembler. No .opd
6435 optimization for them! */
6436 broken_opd:
6437 (*_bfd_error_handler)
6438 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6439 need_edit = FALSE;
6440 break;
6441 }
6442
6443 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6444 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6445 {
6446 (*_bfd_error_handler)
6447 (_("%B: unexpected reloc type %u in .opd section"),
6448 ibfd, r_type);
6449 need_edit = FALSE;
6450 break;
6451 }
6452
6453 r_symndx = ELF64_R_SYM (rel->r_info);
6454 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6455 r_symndx, ibfd))
6456 goto error_ret;
6457
6458 if (sym_sec == NULL || sym_sec->owner == NULL)
6459 {
6460 const char *sym_name;
6461 if (h != NULL)
6462 sym_name = h->root.root.string;
6463 else
6464 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6465 sym_sec);
6466
6467 (*_bfd_error_handler)
6468 (_("%B: undefined sym `%s' in .opd section"),
6469 ibfd, sym_name);
6470 need_edit = FALSE;
6471 break;
6472 }
6473
6474 /* opd entries are always for functions defined in the
6475 current input bfd. If the symbol isn't defined in the
6476 input bfd, then we won't be using the function in this
6477 bfd; It must be defined in a linkonce section in another
6478 bfd, or is weak. It's also possible that we are
6479 discarding the function due to a linker script /DISCARD/,
6480 which we test for via the output_section. */
6481 if (sym_sec->owner != ibfd
6482 || sym_sec->output_section == bfd_abs_section_ptr)
6483 need_edit = TRUE;
6484
6485 rel += 2;
6486 if (rel == relend
6487 || (rel + 1 == relend && rel->r_offset == offset + 16))
6488 {
6489 if (sec->size == offset + 24)
6490 {
6491 need_pad = NULL;
6492 break;
6493 }
6494 if (rel == relend && sec->size == offset + 16)
6495 {
6496 cnt_16b++;
6497 break;
6498 }
6499 goto broken_opd;
6500 }
6501
6502 if (rel->r_offset == offset + 24)
6503 offset += 24;
6504 else if (rel->r_offset != offset + 16)
6505 goto broken_opd;
6506 else if (rel + 1 < relend
6507 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6508 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6509 {
6510 offset += 16;
6511 cnt_16b++;
6512 }
6513 else if (rel + 2 < relend
6514 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6515 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6516 {
6517 offset += 24;
6518 rel += 1;
6519 }
6520 else
6521 goto broken_opd;
6522 }
6523
6524 add_aux_fields = non_overlapping && cnt_16b > 0;
6525
6526 if (need_edit || add_aux_fields)
6527 {
6528 Elf_Internal_Rela *write_rel;
6529 bfd_byte *rptr, *wptr;
6530 bfd_byte *new_contents = NULL;
6531 bfd_boolean skip;
6532 long opd_ent_size;
6533
6534 /* This seems a waste of time as input .opd sections are all
6535 zeros as generated by gcc, but I suppose there's no reason
6536 this will always be so. We might start putting something in
6537 the third word of .opd entries. */
6538 if ((sec->flags & SEC_IN_MEMORY) == 0)
6539 {
6540 bfd_byte *loc;
6541 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6542 {
6543 if (loc != NULL)
6544 free (loc);
6545 error_ret:
6546 if (local_syms != NULL
6547 && symtab_hdr->contents != (unsigned char *) local_syms)
6548 free (local_syms);
6549 if (elf_section_data (sec)->relocs != relstart)
6550 free (relstart);
6551 return FALSE;
6552 }
6553 sec->contents = loc;
6554 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6555 }
6556
6557 elf_section_data (sec)->relocs = relstart;
6558
6559 new_contents = sec->contents;
6560 if (add_aux_fields)
6561 {
6562 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6563 if (new_contents == NULL)
6564 return FALSE;
6565 need_pad = FALSE;
6566 }
6567 wptr = new_contents;
6568 rptr = sec->contents;
6569
6570 write_rel = relstart;
6571 skip = FALSE;
6572 offset = 0;
6573 opd_ent_size = 0;
6574 for (rel = relstart; rel < relend; rel++)
6575 {
6576 unsigned long r_symndx;
6577 asection *sym_sec;
6578 struct elf_link_hash_entry *h;
6579 Elf_Internal_Sym *sym;
6580
6581 r_symndx = ELF64_R_SYM (rel->r_info);
6582 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6583 r_symndx, ibfd))
6584 goto error_ret;
6585
6586 if (rel->r_offset == offset)
6587 {
6588 struct ppc_link_hash_entry *fdh = NULL;
6589
6590 /* See if the .opd entry is full 24 byte or
6591 16 byte (with fd_aux entry overlapped with next
6592 fd_func). */
6593 opd_ent_size = 24;
6594 if ((rel + 2 == relend && sec->size == offset + 16)
6595 || (rel + 3 < relend
6596 && rel[2].r_offset == offset + 16
6597 && rel[3].r_offset == offset + 24
6598 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6599 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6600 opd_ent_size = 16;
6601
6602 if (h != NULL
6603 && h->root.root.string[0] == '.')
6604 {
6605 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6606 ppc_hash_table (info));
6607 if (fdh != NULL
6608 && fdh->elf.root.type != bfd_link_hash_defined
6609 && fdh->elf.root.type != bfd_link_hash_defweak)
6610 fdh = NULL;
6611 }
6612
6613 skip = (sym_sec->owner != ibfd
6614 || sym_sec->output_section == bfd_abs_section_ptr);
6615 if (skip)
6616 {
6617 if (fdh != NULL && sym_sec->owner == ibfd)
6618 {
6619 /* Arrange for the function descriptor sym
6620 to be dropped. */
6621 fdh->elf.root.u.def.value = 0;
6622 fdh->elf.root.u.def.section = sym_sec;
6623 }
6624 opd_adjust[rel->r_offset / 8] = -1;
6625 }
6626 else
6627 {
6628 /* We'll be keeping this opd entry. */
6629
6630 if (fdh != NULL)
6631 {
6632 /* Redefine the function descriptor symbol to
6633 this location in the opd section. It is
6634 necessary to update the value here rather
6635 than using an array of adjustments as we do
6636 for local symbols, because various places
6637 in the generic ELF code use the value
6638 stored in u.def.value. */
6639 fdh->elf.root.u.def.value = wptr - new_contents;
6640 fdh->adjust_done = 1;
6641 }
6642
6643 /* Local syms are a bit tricky. We could
6644 tweak them as they can be cached, but
6645 we'd need to look through the local syms
6646 for the function descriptor sym which we
6647 don't have at the moment. So keep an
6648 array of adjustments. */
6649 opd_adjust[rel->r_offset / 8]
6650 = (wptr - new_contents) - (rptr - sec->contents);
6651
6652 if (wptr != rptr)
6653 memcpy (wptr, rptr, opd_ent_size);
6654 wptr += opd_ent_size;
6655 if (add_aux_fields && opd_ent_size == 16)
6656 {
6657 memset (wptr, '\0', 8);
6658 wptr += 8;
6659 }
6660 }
6661 rptr += opd_ent_size;
6662 offset += opd_ent_size;
6663 }
6664
6665 if (skip)
6666 {
6667 if (!NO_OPD_RELOCS
6668 && !info->relocatable
6669 && !dec_dynrel_count (rel->r_info, sec, info,
6670 NULL, h, sym_sec))
6671 goto error_ret;
6672 }
6673 else
6674 {
6675 /* We need to adjust any reloc offsets to point to the
6676 new opd entries. While we're at it, we may as well
6677 remove redundant relocs. */
6678 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6679 if (write_rel != rel)
6680 memcpy (write_rel, rel, sizeof (*rel));
6681 ++write_rel;
6682 }
6683 }
6684
6685 sec->size = wptr - new_contents;
6686 sec->reloc_count = write_rel - relstart;
6687 if (add_aux_fields)
6688 {
6689 free (sec->contents);
6690 sec->contents = new_contents;
6691 }
6692
6693 /* Fudge the header size too, as this is used later in
6694 elf_bfd_final_link if we are emitting relocs. */
6695 elf_section_data (sec)->rel_hdr.sh_size
6696 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6697 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6698 some_edited = TRUE;
6699 }
6700 else if (elf_section_data (sec)->relocs != relstart)
6701 free (relstart);
6702
6703 if (local_syms != NULL
6704 && symtab_hdr->contents != (unsigned char *) local_syms)
6705 {
6706 if (!info->keep_memory)
6707 free (local_syms);
6708 else
6709 symtab_hdr->contents = (unsigned char *) local_syms;
6710 }
6711 }
6712
6713 if (some_edited)
6714 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6715
6716 /* If we are doing a final link and the last .opd entry is just 16 byte
6717 long, add a 8 byte padding after it. */
6718 if (need_pad != NULL && !info->relocatable)
6719 {
6720 bfd_byte *p;
6721
6722 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6723 {
6724 BFD_ASSERT (need_pad->size > 0);
6725
6726 p = bfd_malloc (need_pad->size + 8);
6727 if (p == NULL)
6728 return FALSE;
6729
6730 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6731 p, 0, need_pad->size))
6732 return FALSE;
6733
6734 need_pad->contents = p;
6735 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6736 }
6737 else
6738 {
6739 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6740 if (p == NULL)
6741 return FALSE;
6742
6743 need_pad->contents = p;
6744 }
6745
6746 memset (need_pad->contents + need_pad->size, 0, 8);
6747 need_pad->size += 8;
6748 }
6749
6750 return TRUE;
6751 }
6752
6753 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6754
6755 asection *
6756 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6757 {
6758 struct ppc_link_hash_table *htab;
6759
6760 htab = ppc_hash_table (info);
6761 if (htab->tls_get_addr != NULL)
6762 {
6763 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6764
6765 while (h->elf.root.type == bfd_link_hash_indirect
6766 || h->elf.root.type == bfd_link_hash_warning)
6767 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6768
6769 htab->tls_get_addr = h;
6770
6771 if (htab->tls_get_addr_fd == NULL
6772 && h->oh != NULL
6773 && h->oh->is_func_descriptor
6774 && (h->oh->elf.root.type == bfd_link_hash_defined
6775 || h->oh->elf.root.type == bfd_link_hash_defweak))
6776 htab->tls_get_addr_fd = h->oh;
6777 }
6778
6779 if (htab->tls_get_addr_fd != NULL)
6780 {
6781 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6782
6783 while (h->elf.root.type == bfd_link_hash_indirect
6784 || h->elf.root.type == bfd_link_hash_warning)
6785 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6786
6787 htab->tls_get_addr_fd = h;
6788 }
6789
6790 return _bfd_elf_tls_setup (obfd, info);
6791 }
6792
6793 /* Run through all the TLS relocs looking for optimization
6794 opportunities. The linker has been hacked (see ppc64elf.em) to do
6795 a preliminary section layout so that we know the TLS segment
6796 offsets. We can't optimize earlier because some optimizations need
6797 to know the tp offset, and we need to optimize before allocating
6798 dynamic relocations. */
6799
6800 bfd_boolean
6801 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6802 {
6803 bfd *ibfd;
6804 asection *sec;
6805 struct ppc_link_hash_table *htab;
6806 int pass;
6807
6808 if (info->relocatable || info->shared)
6809 return TRUE;
6810
6811 htab = ppc_hash_table (info);
6812 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6813 {
6814 Elf_Internal_Sym *locsyms = NULL;
6815 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6816 unsigned char *toc_ref = NULL;
6817
6818 /* Look at all the sections for this file. Make two passes over
6819 the relocs. On the first pass, mark toc entries involved
6820 with tls relocs, and check that tls relocs involved in
6821 setting up a tls_get_addr call are indeed followed by such a
6822 call. If they are not, exclude them from the optimizations
6823 done on the second pass. */
6824 for (pass = 0; pass < 2; ++pass)
6825 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6826 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6827 {
6828 Elf_Internal_Rela *relstart, *rel, *relend;
6829
6830 /* Read the relocations. */
6831 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6832 info->keep_memory);
6833 if (relstart == NULL)
6834 return FALSE;
6835
6836 relend = relstart + sec->reloc_count;
6837 for (rel = relstart; rel < relend; rel++)
6838 {
6839 enum elf_ppc64_reloc_type r_type;
6840 unsigned long r_symndx;
6841 struct elf_link_hash_entry *h;
6842 Elf_Internal_Sym *sym;
6843 asection *sym_sec;
6844 char *tls_mask;
6845 char tls_set, tls_clear, tls_type = 0;
6846 bfd_vma value;
6847 bfd_boolean ok_tprel, is_local;
6848 long toc_ref_index = 0;
6849 int expecting_tls_get_addr = 0;
6850
6851 r_symndx = ELF64_R_SYM (rel->r_info);
6852 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6853 r_symndx, ibfd))
6854 {
6855 err_free_rel:
6856 if (elf_section_data (sec)->relocs != relstart)
6857 free (relstart);
6858 if (toc_ref != NULL)
6859 free (toc_ref);
6860 if (locsyms != NULL
6861 && (elf_tdata (ibfd)->symtab_hdr.contents
6862 != (unsigned char *) locsyms))
6863 free (locsyms);
6864 return FALSE;
6865 }
6866
6867 if (h != NULL)
6868 {
6869 if (h->root.type != bfd_link_hash_defined
6870 && h->root.type != bfd_link_hash_defweak)
6871 continue;
6872 value = h->root.u.def.value;
6873 }
6874 else
6875 /* Symbols referenced by TLS relocs must be of type
6876 STT_TLS. So no need for .opd local sym adjust. */
6877 value = sym->st_value;
6878
6879 ok_tprel = FALSE;
6880 is_local = FALSE;
6881 if (h == NULL
6882 || !h->def_dynamic)
6883 {
6884 is_local = TRUE;
6885 value += sym_sec->output_offset;
6886 value += sym_sec->output_section->vma;
6887 value -= htab->elf.tls_sec->vma;
6888 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6889 < (bfd_vma) 1 << 32);
6890 }
6891
6892 r_type = ELF64_R_TYPE (rel->r_info);
6893 switch (r_type)
6894 {
6895 case R_PPC64_GOT_TLSLD16:
6896 case R_PPC64_GOT_TLSLD16_LO:
6897 expecting_tls_get_addr = 1;
6898 /* Fall thru */
6899
6900 case R_PPC64_GOT_TLSLD16_HI:
6901 case R_PPC64_GOT_TLSLD16_HA:
6902 /* These relocs should never be against a symbol
6903 defined in a shared lib. Leave them alone if
6904 that turns out to be the case. */
6905 if (!is_local)
6906 continue;
6907
6908 /* LD -> LE */
6909 tls_set = 0;
6910 tls_clear = TLS_LD;
6911 tls_type = TLS_TLS | TLS_LD;
6912 break;
6913
6914 case R_PPC64_GOT_TLSGD16:
6915 case R_PPC64_GOT_TLSGD16_LO:
6916 expecting_tls_get_addr = 1;
6917 /* Fall thru */
6918
6919 case R_PPC64_GOT_TLSGD16_HI:
6920 case R_PPC64_GOT_TLSGD16_HA:
6921 if (ok_tprel)
6922 /* GD -> LE */
6923 tls_set = 0;
6924 else
6925 /* GD -> IE */
6926 tls_set = TLS_TLS | TLS_TPRELGD;
6927 tls_clear = TLS_GD;
6928 tls_type = TLS_TLS | TLS_GD;
6929 break;
6930
6931 case R_PPC64_GOT_TPREL16_DS:
6932 case R_PPC64_GOT_TPREL16_LO_DS:
6933 case R_PPC64_GOT_TPREL16_HI:
6934 case R_PPC64_GOT_TPREL16_HA:
6935 if (ok_tprel)
6936 {
6937 /* IE -> LE */
6938 tls_set = 0;
6939 tls_clear = TLS_TPREL;
6940 tls_type = TLS_TLS | TLS_TPREL;
6941 break;
6942 }
6943 continue;
6944
6945 case R_PPC64_TOC16:
6946 case R_PPC64_TOC16_LO:
6947 case R_PPC64_TLS:
6948 if (sym_sec == NULL || sym_sec != toc)
6949 continue;
6950
6951 /* Mark this toc entry as referenced by a TLS
6952 code sequence. We can do that now in the
6953 case of R_PPC64_TLS, and after checking for
6954 tls_get_addr for the TOC16 relocs. */
6955 if (toc_ref == NULL)
6956 {
6957 toc_ref = bfd_zmalloc (toc->size / 8);
6958 if (toc_ref == NULL)
6959 goto err_free_rel;
6960 }
6961 if (h != NULL)
6962 value = h->root.u.def.value;
6963 else
6964 value = sym->st_value;
6965 value += rel->r_addend;
6966 BFD_ASSERT (value < toc->size && value % 8 == 0);
6967 toc_ref_index = value / 8;
6968 if (r_type == R_PPC64_TLS)
6969 {
6970 toc_ref[toc_ref_index] = 1;
6971 continue;
6972 }
6973
6974 if (pass != 0 && toc_ref[toc_ref_index] == 0)
6975 continue;
6976
6977 tls_set = 0;
6978 tls_clear = 0;
6979 expecting_tls_get_addr = 2;
6980 break;
6981
6982 case R_PPC64_TPREL64:
6983 if (pass == 0
6984 || sec != toc
6985 || toc_ref == NULL
6986 || !toc_ref[rel->r_offset / 8])
6987 continue;
6988 if (ok_tprel)
6989 {
6990 /* IE -> LE */
6991 tls_set = TLS_EXPLICIT;
6992 tls_clear = TLS_TPREL;
6993 break;
6994 }
6995 continue;
6996
6997 case R_PPC64_DTPMOD64:
6998 if (pass == 0
6999 || sec != toc
7000 || toc_ref == NULL
7001 || !toc_ref[rel->r_offset / 8])
7002 continue;
7003 if (rel + 1 < relend
7004 && (rel[1].r_info
7005 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7006 && rel[1].r_offset == rel->r_offset + 8)
7007 {
7008 if (ok_tprel)
7009 /* GD -> LE */
7010 tls_set = TLS_EXPLICIT | TLS_GD;
7011 else
7012 /* GD -> IE */
7013 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7014 tls_clear = TLS_GD;
7015 }
7016 else
7017 {
7018 if (!is_local)
7019 continue;
7020
7021 /* LD -> LE */
7022 tls_set = TLS_EXPLICIT;
7023 tls_clear = TLS_LD;
7024 }
7025 break;
7026
7027 default:
7028 continue;
7029 }
7030
7031 if (pass == 0)
7032 {
7033 if (!expecting_tls_get_addr)
7034 continue;
7035
7036 if (rel + 1 < relend)
7037 {
7038 Elf_Internal_Shdr *symtab_hdr;
7039 enum elf_ppc64_reloc_type r_type2;
7040 unsigned long r_symndx2;
7041 struct elf_link_hash_entry *h2;
7042
7043 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7044
7045 /* The next instruction should be a call to
7046 __tls_get_addr. Peek at the reloc to be sure. */
7047 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7048 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7049 if (r_symndx2 >= symtab_hdr->sh_info
7050 && (r_type2 == R_PPC64_REL14
7051 || r_type2 == R_PPC64_REL14_BRTAKEN
7052 || r_type2 == R_PPC64_REL14_BRNTAKEN
7053 || r_type2 == R_PPC64_REL24))
7054 {
7055 struct elf_link_hash_entry **sym_hashes;
7056
7057 sym_hashes = elf_sym_hashes (ibfd);
7058
7059 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7060 while (h2->root.type == bfd_link_hash_indirect
7061 || h2->root.type == bfd_link_hash_warning)
7062 h2 = ((struct elf_link_hash_entry *)
7063 h2->root.u.i.link);
7064 if (h2 != NULL
7065 && (h2 == &htab->tls_get_addr->elf
7066 || h2 == &htab->tls_get_addr_fd->elf))
7067 {
7068 if (expecting_tls_get_addr == 2)
7069 {
7070 /* Check for toc tls entries. */
7071 char *toc_tls;
7072 int retval;
7073
7074 retval = get_tls_mask (&toc_tls, NULL,
7075 &locsyms,
7076 rel, ibfd);
7077 if (retval == 0)
7078 goto err_free_rel;
7079 if (retval > 1 && toc_tls != NULL)
7080 toc_ref[toc_ref_index] = 1;
7081 }
7082 continue;
7083 }
7084 }
7085 }
7086
7087 if (expecting_tls_get_addr != 1)
7088 continue;
7089
7090 /* Uh oh, we didn't find the expected call. We
7091 could just mark this symbol to exclude it
7092 from tls optimization but it's safer to skip
7093 the entire section. */
7094 sec->has_tls_reloc = 0;
7095 break;
7096 }
7097
7098 if (expecting_tls_get_addr)
7099 {
7100 struct plt_entry *ent;
7101 for (ent = htab->tls_get_addr->elf.plt.plist;
7102 ent != NULL;
7103 ent = ent->next)
7104 if (ent->addend == 0)
7105 {
7106 if (ent->plt.refcount > 0)
7107 {
7108 ent->plt.refcount -= 1;
7109 expecting_tls_get_addr = 0;
7110 }
7111 break;
7112 }
7113 }
7114
7115 if (expecting_tls_get_addr)
7116 {
7117 struct plt_entry *ent;
7118 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7119 ent != NULL;
7120 ent = ent->next)
7121 if (ent->addend == 0)
7122 {
7123 if (ent->plt.refcount > 0)
7124 ent->plt.refcount -= 1;
7125 break;
7126 }
7127 }
7128
7129 if (tls_clear == 0)
7130 continue;
7131
7132 if ((tls_set & TLS_EXPLICIT) == 0)
7133 {
7134 struct got_entry *ent;
7135
7136 /* Adjust got entry for this reloc. */
7137 if (h != NULL)
7138 ent = h->got.glist;
7139 else
7140 ent = elf_local_got_ents (ibfd)[r_symndx];
7141
7142 for (; ent != NULL; ent = ent->next)
7143 if (ent->addend == rel->r_addend
7144 && ent->owner == ibfd
7145 && ent->tls_type == tls_type)
7146 break;
7147 if (ent == NULL)
7148 abort ();
7149
7150 if (tls_set == 0)
7151 {
7152 /* We managed to get rid of a got entry. */
7153 if (ent->got.refcount > 0)
7154 ent->got.refcount -= 1;
7155 }
7156 }
7157 else
7158 {
7159 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7160 we'll lose one or two dyn relocs. */
7161 if (!dec_dynrel_count (rel->r_info, sec, info,
7162 NULL, h, sym_sec))
7163 return FALSE;
7164
7165 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7166 {
7167 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7168 NULL, h, sym_sec))
7169 return FALSE;
7170 }
7171 }
7172
7173 *tls_mask |= tls_set;
7174 *tls_mask &= ~tls_clear;
7175 }
7176
7177 if (elf_section_data (sec)->relocs != relstart)
7178 free (relstart);
7179 }
7180
7181 if (toc_ref != NULL)
7182 free (toc_ref);
7183
7184 if (locsyms != NULL
7185 && (elf_tdata (ibfd)->symtab_hdr.contents
7186 != (unsigned char *) locsyms))
7187 {
7188 if (!info->keep_memory)
7189 free (locsyms);
7190 else
7191 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7192 }
7193 }
7194 return TRUE;
7195 }
7196
7197 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7198 the values of any global symbols in a toc section that has been
7199 edited. Globals in toc sections should be a rarity, so this function
7200 sets a flag if any are found in toc sections other than the one just
7201 edited, so that futher hash table traversals can be avoided. */
7202
7203 struct adjust_toc_info
7204 {
7205 asection *toc;
7206 unsigned long *skip;
7207 bfd_boolean global_toc_syms;
7208 };
7209
7210 static bfd_boolean
7211 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7212 {
7213 struct ppc_link_hash_entry *eh;
7214 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7215
7216 if (h->root.type == bfd_link_hash_indirect)
7217 return TRUE;
7218
7219 if (h->root.type == bfd_link_hash_warning)
7220 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7221
7222 if (h->root.type != bfd_link_hash_defined
7223 && h->root.type != bfd_link_hash_defweak)
7224 return TRUE;
7225
7226 eh = (struct ppc_link_hash_entry *) h;
7227 if (eh->adjust_done)
7228 return TRUE;
7229
7230 if (eh->elf.root.u.def.section == toc_inf->toc)
7231 {
7232 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7233 if (skip != (unsigned long) -1)
7234 eh->elf.root.u.def.value -= skip;
7235 else
7236 {
7237 (*_bfd_error_handler)
7238 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7239 eh->elf.root.u.def.section = &bfd_abs_section;
7240 eh->elf.root.u.def.value = 0;
7241 }
7242 eh->adjust_done = 1;
7243 }
7244 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7245 toc_inf->global_toc_syms = TRUE;
7246
7247 return TRUE;
7248 }
7249
7250 /* Examine all relocs referencing .toc sections in order to remove
7251 unused .toc entries. */
7252
7253 bfd_boolean
7254 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7255 {
7256 bfd *ibfd;
7257 struct adjust_toc_info toc_inf;
7258
7259 toc_inf.global_toc_syms = TRUE;
7260 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7261 {
7262 asection *toc, *sec;
7263 Elf_Internal_Shdr *symtab_hdr;
7264 Elf_Internal_Sym *local_syms;
7265 struct elf_link_hash_entry **sym_hashes;
7266 Elf_Internal_Rela *relstart, *rel;
7267 unsigned long *skip, *drop;
7268 unsigned char *used;
7269 unsigned char *keep, last, some_unused;
7270
7271 toc = bfd_get_section_by_name (ibfd, ".toc");
7272 if (toc == NULL
7273 || toc->size == 0
7274 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7275 || elf_discarded_section (toc))
7276 continue;
7277
7278 local_syms = NULL;
7279 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7280 sym_hashes = elf_sym_hashes (ibfd);
7281
7282 /* Look at sections dropped from the final link. */
7283 skip = NULL;
7284 relstart = NULL;
7285 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7286 {
7287 if (sec->reloc_count == 0
7288 || !elf_discarded_section (sec)
7289 || get_opd_info (sec)
7290 || (sec->flags & SEC_ALLOC) == 0
7291 || (sec->flags & SEC_DEBUGGING) != 0)
7292 continue;
7293
7294 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7295 if (relstart == NULL)
7296 goto error_ret;
7297
7298 /* Run through the relocs to see which toc entries might be
7299 unused. */
7300 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7301 {
7302 enum elf_ppc64_reloc_type r_type;
7303 unsigned long r_symndx;
7304 asection *sym_sec;
7305 struct elf_link_hash_entry *h;
7306 Elf_Internal_Sym *sym;
7307 bfd_vma val;
7308
7309 r_type = ELF64_R_TYPE (rel->r_info);
7310 switch (r_type)
7311 {
7312 default:
7313 continue;
7314
7315 case R_PPC64_TOC16:
7316 case R_PPC64_TOC16_LO:
7317 case R_PPC64_TOC16_HI:
7318 case R_PPC64_TOC16_HA:
7319 case R_PPC64_TOC16_DS:
7320 case R_PPC64_TOC16_LO_DS:
7321 break;
7322 }
7323
7324 r_symndx = ELF64_R_SYM (rel->r_info);
7325 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7326 r_symndx, ibfd))
7327 goto error_ret;
7328
7329 if (sym_sec != toc)
7330 continue;
7331
7332 if (h != NULL)
7333 val = h->root.u.def.value;
7334 else
7335 val = sym->st_value;
7336 val += rel->r_addend;
7337
7338 if (val >= toc->size)
7339 continue;
7340
7341 /* Anything in the toc ought to be aligned to 8 bytes.
7342 If not, don't mark as unused. */
7343 if (val & 7)
7344 continue;
7345
7346 if (skip == NULL)
7347 {
7348 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7349 if (skip == NULL)
7350 goto error_ret;
7351 }
7352
7353 skip[val >> 3] = 1;
7354 }
7355
7356 if (elf_section_data (sec)->relocs != relstart)
7357 free (relstart);
7358 }
7359
7360 if (skip == NULL)
7361 continue;
7362
7363 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7364 if (used == NULL)
7365 {
7366 error_ret:
7367 if (local_syms != NULL
7368 && symtab_hdr->contents != (unsigned char *) local_syms)
7369 free (local_syms);
7370 if (sec != NULL
7371 && relstart != NULL
7372 && elf_section_data (sec)->relocs != relstart)
7373 free (relstart);
7374 if (skip != NULL)
7375 free (skip);
7376 return FALSE;
7377 }
7378
7379 /* Now check all kept sections that might reference the toc.
7380 Check the toc itself last. */
7381 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7382 : ibfd->sections);
7383 sec != NULL;
7384 sec = (sec == toc ? NULL
7385 : sec->next == NULL ? toc
7386 : sec->next == toc && toc->next ? toc->next
7387 : sec->next))
7388 {
7389 int repeat;
7390
7391 if (sec->reloc_count == 0
7392 || elf_discarded_section (sec)
7393 || get_opd_info (sec)
7394 || (sec->flags & SEC_ALLOC) == 0
7395 || (sec->flags & SEC_DEBUGGING) != 0)
7396 continue;
7397
7398 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7399 if (relstart == NULL)
7400 goto error_ret;
7401
7402 /* Mark toc entries referenced as used. */
7403 repeat = 0;
7404 do
7405 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7406 {
7407 enum elf_ppc64_reloc_type r_type;
7408 unsigned long r_symndx;
7409 asection *sym_sec;
7410 struct elf_link_hash_entry *h;
7411 Elf_Internal_Sym *sym;
7412 bfd_vma val;
7413
7414 r_type = ELF64_R_TYPE (rel->r_info);
7415 switch (r_type)
7416 {
7417 case R_PPC64_TOC16:
7418 case R_PPC64_TOC16_LO:
7419 case R_PPC64_TOC16_HI:
7420 case R_PPC64_TOC16_HA:
7421 case R_PPC64_TOC16_DS:
7422 case R_PPC64_TOC16_LO_DS:
7423 /* In case we're taking addresses of toc entries. */
7424 case R_PPC64_ADDR64:
7425 break;
7426
7427 default:
7428 continue;
7429 }
7430
7431 r_symndx = ELF64_R_SYM (rel->r_info);
7432 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7433 r_symndx, ibfd))
7434 {
7435 free (used);
7436 goto error_ret;
7437 }
7438
7439 if (sym_sec != toc)
7440 continue;
7441
7442 if (h != NULL)
7443 val = h->root.u.def.value;
7444 else
7445 val = sym->st_value;
7446 val += rel->r_addend;
7447
7448 if (val >= toc->size)
7449 continue;
7450
7451 /* For the toc section, we only mark as used if
7452 this entry itself isn't unused. */
7453 if (sec == toc
7454 && !used[val >> 3]
7455 && (used[rel->r_offset >> 3]
7456 || !skip[rel->r_offset >> 3]))
7457 /* Do all the relocs again, to catch reference
7458 chains. */
7459 repeat = 1;
7460
7461 used[val >> 3] = 1;
7462 }
7463 while (repeat);
7464 }
7465
7466 /* Merge the used and skip arrays. Assume that TOC
7467 doublewords not appearing as either used or unused belong
7468 to to an entry more than one doubleword in size. */
7469 for (drop = skip, keep = used, last = 0, some_unused = 0;
7470 drop < skip + (toc->size + 7) / 8;
7471 ++drop, ++keep)
7472 {
7473 if (*keep)
7474 {
7475 *drop = 0;
7476 last = 0;
7477 }
7478 else if (*drop)
7479 {
7480 some_unused = 1;
7481 last = 1;
7482 }
7483 else
7484 *drop = last;
7485 }
7486
7487 free (used);
7488
7489 if (some_unused)
7490 {
7491 bfd_byte *contents, *src;
7492 unsigned long off;
7493
7494 /* Shuffle the toc contents, and at the same time convert the
7495 skip array from booleans into offsets. */
7496 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7497 goto error_ret;
7498
7499 elf_section_data (toc)->this_hdr.contents = contents;
7500
7501 for (src = contents, off = 0, drop = skip;
7502 src < contents + toc->size;
7503 src += 8, ++drop)
7504 {
7505 if (*drop)
7506 {
7507 *drop = (unsigned long) -1;
7508 off += 8;
7509 }
7510 else if (off != 0)
7511 {
7512 *drop = off;
7513 memcpy (src - off, src, 8);
7514 }
7515 }
7516 toc->rawsize = toc->size;
7517 toc->size = src - contents - off;
7518
7519 if (toc->reloc_count != 0)
7520 {
7521 Elf_Internal_Rela *wrel;
7522 bfd_size_type sz;
7523
7524 /* Read toc relocs. */
7525 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7526 TRUE);
7527 if (relstart == NULL)
7528 goto error_ret;
7529
7530 /* Remove unused toc relocs, and adjust those we keep. */
7531 wrel = relstart;
7532 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7533 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7534 {
7535 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7536 wrel->r_info = rel->r_info;
7537 wrel->r_addend = rel->r_addend;
7538 ++wrel;
7539 }
7540 else if (!dec_dynrel_count (rel->r_info, toc, info,
7541 &local_syms, NULL, NULL))
7542 goto error_ret;
7543
7544 toc->reloc_count = wrel - relstart;
7545 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7546 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7547 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7548 }
7549
7550 /* Adjust addends for relocs against the toc section sym. */
7551 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7552 {
7553 if (sec->reloc_count == 0
7554 || elf_discarded_section (sec))
7555 continue;
7556
7557 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7558 TRUE);
7559 if (relstart == NULL)
7560 goto error_ret;
7561
7562 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7563 {
7564 enum elf_ppc64_reloc_type r_type;
7565 unsigned long r_symndx;
7566 asection *sym_sec;
7567 struct elf_link_hash_entry *h;
7568 Elf_Internal_Sym *sym;
7569
7570 r_type = ELF64_R_TYPE (rel->r_info);
7571 switch (r_type)
7572 {
7573 default:
7574 continue;
7575
7576 case R_PPC64_TOC16:
7577 case R_PPC64_TOC16_LO:
7578 case R_PPC64_TOC16_HI:
7579 case R_PPC64_TOC16_HA:
7580 case R_PPC64_TOC16_DS:
7581 case R_PPC64_TOC16_LO_DS:
7582 case R_PPC64_ADDR64:
7583 break;
7584 }
7585
7586 r_symndx = ELF64_R_SYM (rel->r_info);
7587 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7588 r_symndx, ibfd))
7589 goto error_ret;
7590
7591 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7592 continue;
7593
7594 rel->r_addend -= skip[rel->r_addend >> 3];
7595 }
7596 }
7597
7598 /* We shouldn't have local or global symbols defined in the TOC,
7599 but handle them anyway. */
7600 if (local_syms != NULL)
7601 {
7602 Elf_Internal_Sym *sym;
7603
7604 for (sym = local_syms;
7605 sym < local_syms + symtab_hdr->sh_info;
7606 ++sym)
7607 if (sym->st_shndx != SHN_UNDEF
7608 && (sym->st_shndx < SHN_LORESERVE
7609 || sym->st_shndx > SHN_HIRESERVE)
7610 && sym->st_value != 0
7611 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7612 {
7613 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7614 sym->st_value -= skip[sym->st_value >> 3];
7615 else
7616 {
7617 (*_bfd_error_handler)
7618 (_("%s defined in removed toc entry"),
7619 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7620 NULL));
7621 sym->st_value = 0;
7622 sym->st_shndx = SHN_ABS;
7623 }
7624 symtab_hdr->contents = (unsigned char *) local_syms;
7625 }
7626 }
7627
7628 /* Finally, adjust any global syms defined in the toc. */
7629 if (toc_inf.global_toc_syms)
7630 {
7631 toc_inf.toc = toc;
7632 toc_inf.skip = skip;
7633 toc_inf.global_toc_syms = FALSE;
7634 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7635 &toc_inf);
7636 }
7637 }
7638
7639 if (local_syms != NULL
7640 && symtab_hdr->contents != (unsigned char *) local_syms)
7641 {
7642 if (!info->keep_memory)
7643 free (local_syms);
7644 else
7645 symtab_hdr->contents = (unsigned char *) local_syms;
7646 }
7647 free (skip);
7648 }
7649
7650 return TRUE;
7651 }
7652
7653 /* Allocate space in .plt, .got and associated reloc sections for
7654 dynamic relocs. */
7655
7656 static bfd_boolean
7657 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7658 {
7659 struct bfd_link_info *info;
7660 struct ppc_link_hash_table *htab;
7661 asection *s;
7662 struct ppc_link_hash_entry *eh;
7663 struct ppc_dyn_relocs *p;
7664 struct got_entry *gent;
7665
7666 if (h->root.type == bfd_link_hash_indirect)
7667 return TRUE;
7668
7669 if (h->root.type == bfd_link_hash_warning)
7670 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7671
7672 info = (struct bfd_link_info *) inf;
7673 htab = ppc_hash_table (info);
7674
7675 if (htab->elf.dynamic_sections_created
7676 && h->dynindx != -1
7677 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7678 {
7679 struct plt_entry *pent;
7680 bfd_boolean doneone = FALSE;
7681 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7682 if (pent->plt.refcount > 0)
7683 {
7684 /* If this is the first .plt entry, make room for the special
7685 first entry. */
7686 s = htab->plt;
7687 if (s->size == 0)
7688 s->size += PLT_INITIAL_ENTRY_SIZE;
7689
7690 pent->plt.offset = s->size;
7691
7692 /* Make room for this entry. */
7693 s->size += PLT_ENTRY_SIZE;
7694
7695 /* Make room for the .glink code. */
7696 s = htab->glink;
7697 if (s->size == 0)
7698 s->size += GLINK_CALL_STUB_SIZE;
7699 /* We need bigger stubs past index 32767. */
7700 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7701 s->size += 4;
7702 s->size += 2*4;
7703
7704 /* We also need to make an entry in the .rela.plt section. */
7705 s = htab->relplt;
7706 s->size += sizeof (Elf64_External_Rela);
7707 doneone = TRUE;
7708 }
7709 else
7710 pent->plt.offset = (bfd_vma) -1;
7711 if (!doneone)
7712 {
7713 h->plt.plist = NULL;
7714 h->needs_plt = 0;
7715 }
7716 }
7717 else
7718 {
7719 h->plt.plist = NULL;
7720 h->needs_plt = 0;
7721 }
7722
7723 eh = (struct ppc_link_hash_entry *) h;
7724 /* Run through the TLS GD got entries first if we're changing them
7725 to TPREL. */
7726 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7727 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7728 if (gent->got.refcount > 0
7729 && (gent->tls_type & TLS_GD) != 0)
7730 {
7731 /* This was a GD entry that has been converted to TPREL. If
7732 there happens to be a TPREL entry we can use that one. */
7733 struct got_entry *ent;
7734 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7735 if (ent->got.refcount > 0
7736 && (ent->tls_type & TLS_TPREL) != 0
7737 && ent->addend == gent->addend
7738 && ent->owner == gent->owner)
7739 {
7740 gent->got.refcount = 0;
7741 break;
7742 }
7743
7744 /* If not, then we'll be using our own TPREL entry. */
7745 if (gent->got.refcount != 0)
7746 gent->tls_type = TLS_TLS | TLS_TPREL;
7747 }
7748
7749 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7750 if (gent->got.refcount > 0)
7751 {
7752 bfd_boolean dyn;
7753
7754 /* Make sure this symbol is output as a dynamic symbol.
7755 Undefined weak syms won't yet be marked as dynamic,
7756 nor will all TLS symbols. */
7757 if (h->dynindx == -1
7758 && !h->forced_local)
7759 {
7760 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7761 return FALSE;
7762 }
7763
7764 if ((gent->tls_type & TLS_LD) != 0
7765 && !h->def_dynamic)
7766 {
7767 ppc64_tlsld_got (gent->owner)->refcount += 1;
7768 gent->got.offset = (bfd_vma) -1;
7769 continue;
7770 }
7771
7772 s = ppc64_elf_tdata (gent->owner)->got;
7773 gent->got.offset = s->size;
7774 s->size
7775 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7776 dyn = htab->elf.dynamic_sections_created;
7777 if ((info->shared
7778 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7779 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7780 || h->root.type != bfd_link_hash_undefweak))
7781 ppc64_elf_tdata (gent->owner)->relgot->size
7782 += (gent->tls_type & eh->tls_mask & TLS_GD
7783 ? 2 * sizeof (Elf64_External_Rela)
7784 : sizeof (Elf64_External_Rela));
7785 }
7786 else
7787 gent->got.offset = (bfd_vma) -1;
7788
7789 if (eh->dyn_relocs == NULL)
7790 return TRUE;
7791
7792 /* In the shared -Bsymbolic case, discard space allocated for
7793 dynamic pc-relative relocs against symbols which turn out to be
7794 defined in regular objects. For the normal shared case, discard
7795 space for relocs that have become local due to symbol visibility
7796 changes. */
7797
7798 if (info->shared)
7799 {
7800 /* Relocs that use pc_count are those that appear on a call insn,
7801 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7802 generated via assembly. We want calls to protected symbols to
7803 resolve directly to the function rather than going via the plt.
7804 If people want function pointer comparisons to work as expected
7805 then they should avoid writing weird assembly. */
7806 if (SYMBOL_CALLS_LOCAL (info, h))
7807 {
7808 struct ppc_dyn_relocs **pp;
7809
7810 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7811 {
7812 p->count -= p->pc_count;
7813 p->pc_count = 0;
7814 if (p->count == 0)
7815 *pp = p->next;
7816 else
7817 pp = &p->next;
7818 }
7819 }
7820
7821 /* Also discard relocs on undefined weak syms with non-default
7822 visibility. */
7823 if (eh->dyn_relocs != NULL
7824 && h->root.type == bfd_link_hash_undefweak)
7825 {
7826 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7827 eh->dyn_relocs = NULL;
7828
7829 /* Make sure this symbol is output as a dynamic symbol.
7830 Undefined weak syms won't yet be marked as dynamic. */
7831 else if (h->dynindx == -1
7832 && !h->forced_local)
7833 {
7834 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7835 return FALSE;
7836 }
7837 }
7838 }
7839 else if (ELIMINATE_COPY_RELOCS)
7840 {
7841 /* For the non-shared case, discard space for relocs against
7842 symbols which turn out to need copy relocs or are not
7843 dynamic. */
7844
7845 if (!h->non_got_ref
7846 && h->def_dynamic
7847 && !h->def_regular)
7848 {
7849 /* Make sure this symbol is output as a dynamic symbol.
7850 Undefined weak syms won't yet be marked as dynamic. */
7851 if (h->dynindx == -1
7852 && !h->forced_local)
7853 {
7854 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7855 return FALSE;
7856 }
7857
7858 /* If that succeeded, we know we'll be keeping all the
7859 relocs. */
7860 if (h->dynindx != -1)
7861 goto keep;
7862 }
7863
7864 eh->dyn_relocs = NULL;
7865
7866 keep: ;
7867 }
7868
7869 /* Finally, allocate space. */
7870 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7871 {
7872 asection *sreloc = elf_section_data (p->sec)->sreloc;
7873 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7874 }
7875
7876 return TRUE;
7877 }
7878
7879 /* Find any dynamic relocs that apply to read-only sections. */
7880
7881 static bfd_boolean
7882 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7883 {
7884 struct ppc_link_hash_entry *eh;
7885 struct ppc_dyn_relocs *p;
7886
7887 if (h->root.type == bfd_link_hash_warning)
7888 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7889
7890 eh = (struct ppc_link_hash_entry *) h;
7891 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7892 {
7893 asection *s = p->sec->output_section;
7894
7895 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7896 {
7897 struct bfd_link_info *info = inf;
7898
7899 info->flags |= DF_TEXTREL;
7900
7901 /* Not an error, just cut short the traversal. */
7902 return FALSE;
7903 }
7904 }
7905 return TRUE;
7906 }
7907
7908 /* Set the sizes of the dynamic sections. */
7909
7910 static bfd_boolean
7911 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7912 struct bfd_link_info *info)
7913 {
7914 struct ppc_link_hash_table *htab;
7915 bfd *dynobj;
7916 asection *s;
7917 bfd_boolean relocs;
7918 bfd *ibfd;
7919
7920 htab = ppc_hash_table (info);
7921 dynobj = htab->elf.dynobj;
7922 if (dynobj == NULL)
7923 abort ();
7924
7925 if (htab->elf.dynamic_sections_created)
7926 {
7927 /* Set the contents of the .interp section to the interpreter. */
7928 if (info->executable)
7929 {
7930 s = bfd_get_section_by_name (dynobj, ".interp");
7931 if (s == NULL)
7932 abort ();
7933 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7934 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7935 }
7936 }
7937
7938 /* Set up .got offsets for local syms, and space for local dynamic
7939 relocs. */
7940 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7941 {
7942 struct got_entry **lgot_ents;
7943 struct got_entry **end_lgot_ents;
7944 char *lgot_masks;
7945 bfd_size_type locsymcount;
7946 Elf_Internal_Shdr *symtab_hdr;
7947 asection *srel;
7948
7949 if (!is_ppc64_elf_target (ibfd->xvec))
7950 continue;
7951
7952 for (s = ibfd->sections; s != NULL; s = s->next)
7953 {
7954 struct ppc_dyn_relocs *p;
7955
7956 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7957 {
7958 if (!bfd_is_abs_section (p->sec)
7959 && bfd_is_abs_section (p->sec->output_section))
7960 {
7961 /* Input section has been discarded, either because
7962 it is a copy of a linkonce section or due to
7963 linker script /DISCARD/, so we'll be discarding
7964 the relocs too. */
7965 }
7966 else if (p->count != 0)
7967 {
7968 srel = elf_section_data (p->sec)->sreloc;
7969 srel->size += p->count * sizeof (Elf64_External_Rela);
7970 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7971 info->flags |= DF_TEXTREL;
7972 }
7973 }
7974 }
7975
7976 lgot_ents = elf_local_got_ents (ibfd);
7977 if (!lgot_ents)
7978 continue;
7979
7980 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7981 locsymcount = symtab_hdr->sh_info;
7982 end_lgot_ents = lgot_ents + locsymcount;
7983 lgot_masks = (char *) end_lgot_ents;
7984 s = ppc64_elf_tdata (ibfd)->got;
7985 srel = ppc64_elf_tdata (ibfd)->relgot;
7986 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7987 {
7988 struct got_entry *ent;
7989
7990 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7991 if (ent->got.refcount > 0)
7992 {
7993 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7994 {
7995 ppc64_tlsld_got (ibfd)->refcount += 1;
7996 ent->got.offset = (bfd_vma) -1;
7997 }
7998 else
7999 {
8000 ent->got.offset = s->size;
8001 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8002 {
8003 s->size += 16;
8004 if (info->shared)
8005 srel->size += 2 * sizeof (Elf64_External_Rela);
8006 }
8007 else
8008 {
8009 s->size += 8;
8010 if (info->shared)
8011 srel->size += sizeof (Elf64_External_Rela);
8012 }
8013 }
8014 }
8015 else
8016 ent->got.offset = (bfd_vma) -1;
8017 }
8018 }
8019
8020 /* Allocate global sym .plt and .got entries, and space for global
8021 sym dynamic relocs. */
8022 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8023
8024 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8025 {
8026 if (!is_ppc64_elf_target (ibfd->xvec))
8027 continue;
8028
8029 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8030 {
8031 s = ppc64_elf_tdata (ibfd)->got;
8032 ppc64_tlsld_got (ibfd)->offset = s->size;
8033 s->size += 16;
8034 if (info->shared)
8035 {
8036 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8037 srel->size += sizeof (Elf64_External_Rela);
8038 }
8039 }
8040 else
8041 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8042 }
8043
8044 /* We now have determined the sizes of the various dynamic sections.
8045 Allocate memory for them. */
8046 relocs = FALSE;
8047 for (s = dynobj->sections; s != NULL; s = s->next)
8048 {
8049 if ((s->flags & SEC_LINKER_CREATED) == 0)
8050 continue;
8051
8052 if (s == htab->brlt || s == htab->relbrlt)
8053 /* These haven't been allocated yet; don't strip. */
8054 continue;
8055 else if (s == htab->got
8056 || s == htab->plt
8057 || s == htab->glink
8058 || s == htab->dynbss)
8059 {
8060 /* Strip this section if we don't need it; see the
8061 comment below. */
8062 }
8063 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8064 {
8065 if (s->size != 0)
8066 {
8067 if (s != htab->relplt)
8068 relocs = TRUE;
8069
8070 /* We use the reloc_count field as a counter if we need
8071 to copy relocs into the output file. */
8072 s->reloc_count = 0;
8073 }
8074 }
8075 else
8076 {
8077 /* It's not one of our sections, so don't allocate space. */
8078 continue;
8079 }
8080
8081 if (s->size == 0)
8082 {
8083 /* If we don't need this section, strip it from the
8084 output file. This is mostly to handle .rela.bss and
8085 .rela.plt. We must create both sections in
8086 create_dynamic_sections, because they must be created
8087 before the linker maps input sections to output
8088 sections. The linker does that before
8089 adjust_dynamic_symbol is called, and it is that
8090 function which decides whether anything needs to go
8091 into these sections. */
8092 s->flags |= SEC_EXCLUDE;
8093 continue;
8094 }
8095
8096 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8097 continue;
8098
8099 /* Allocate memory for the section contents. We use bfd_zalloc
8100 here in case unused entries are not reclaimed before the
8101 section's contents are written out. This should not happen,
8102 but this way if it does we get a R_PPC64_NONE reloc in .rela
8103 sections instead of garbage.
8104 We also rely on the section contents being zero when writing
8105 the GOT. */
8106 s->contents = bfd_zalloc (dynobj, s->size);
8107 if (s->contents == NULL)
8108 return FALSE;
8109 }
8110
8111 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8112 {
8113 if (!is_ppc64_elf_target (ibfd->xvec))
8114 continue;
8115
8116 s = ppc64_elf_tdata (ibfd)->got;
8117 if (s != NULL && s != htab->got)
8118 {
8119 if (s->size == 0)
8120 s->flags |= SEC_EXCLUDE;
8121 else
8122 {
8123 s->contents = bfd_zalloc (ibfd, s->size);
8124 if (s->contents == NULL)
8125 return FALSE;
8126 }
8127 }
8128 s = ppc64_elf_tdata (ibfd)->relgot;
8129 if (s != NULL)
8130 {
8131 if (s->size == 0)
8132 s->flags |= SEC_EXCLUDE;
8133 else
8134 {
8135 s->contents = bfd_zalloc (ibfd, s->size);
8136 if (s->contents == NULL)
8137 return FALSE;
8138 relocs = TRUE;
8139 s->reloc_count = 0;
8140 }
8141 }
8142 }
8143
8144 if (htab->elf.dynamic_sections_created)
8145 {
8146 /* Add some entries to the .dynamic section. We fill in the
8147 values later, in ppc64_elf_finish_dynamic_sections, but we
8148 must add the entries now so that we get the correct size for
8149 the .dynamic section. The DT_DEBUG entry is filled in by the
8150 dynamic linker and used by the debugger. */
8151 #define add_dynamic_entry(TAG, VAL) \
8152 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8153
8154 if (info->executable)
8155 {
8156 if (!add_dynamic_entry (DT_DEBUG, 0))
8157 return FALSE;
8158 }
8159
8160 if (htab->plt != NULL && htab->plt->size != 0)
8161 {
8162 if (!add_dynamic_entry (DT_PLTGOT, 0)
8163 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8164 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8165 || !add_dynamic_entry (DT_JMPREL, 0)
8166 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8167 return FALSE;
8168 }
8169
8170 if (NO_OPD_RELOCS)
8171 {
8172 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8173 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8174 return FALSE;
8175 }
8176
8177 if (relocs)
8178 {
8179 if (!add_dynamic_entry (DT_RELA, 0)
8180 || !add_dynamic_entry (DT_RELASZ, 0)
8181 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8182 return FALSE;
8183
8184 /* If any dynamic relocs apply to a read-only section,
8185 then we need a DT_TEXTREL entry. */
8186 if ((info->flags & DF_TEXTREL) == 0)
8187 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8188
8189 if ((info->flags & DF_TEXTREL) != 0)
8190 {
8191 if (!add_dynamic_entry (DT_TEXTREL, 0))
8192 return FALSE;
8193 }
8194 }
8195 }
8196 #undef add_dynamic_entry
8197
8198 return TRUE;
8199 }
8200
8201 /* Determine the type of stub needed, if any, for a call. */
8202
8203 static inline enum ppc_stub_type
8204 ppc_type_of_stub (asection *input_sec,
8205 const Elf_Internal_Rela *rel,
8206 struct ppc_link_hash_entry **hash,
8207 bfd_vma destination)
8208 {
8209 struct ppc_link_hash_entry *h = *hash;
8210 bfd_vma location;
8211 bfd_vma branch_offset;
8212 bfd_vma max_branch_offset;
8213 enum elf_ppc64_reloc_type r_type;
8214
8215 if (h != NULL)
8216 {
8217 struct ppc_link_hash_entry *fdh = h;
8218 if (fdh->oh != NULL
8219 && fdh->oh->is_func_descriptor)
8220 fdh = fdh->oh;
8221
8222 if (fdh->elf.dynindx != -1)
8223 {
8224 struct plt_entry *ent;
8225
8226 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8227 if (ent->addend == rel->r_addend
8228 && ent->plt.offset != (bfd_vma) -1)
8229 {
8230 *hash = fdh;
8231 return ppc_stub_plt_call;
8232 }
8233 }
8234
8235 /* Here, we know we don't have a plt entry. If we don't have a
8236 either a defined function descriptor or a defined entry symbol
8237 in a regular object file, then it is pointless trying to make
8238 any other type of stub. */
8239 if (!((fdh->elf.root.type == bfd_link_hash_defined
8240 || fdh->elf.root.type == bfd_link_hash_defweak)
8241 && fdh->elf.root.u.def.section->output_section != NULL)
8242 && !((h->elf.root.type == bfd_link_hash_defined
8243 || h->elf.root.type == bfd_link_hash_defweak)
8244 && h->elf.root.u.def.section->output_section != NULL))
8245 return ppc_stub_none;
8246 }
8247
8248 /* Determine where the call point is. */
8249 location = (input_sec->output_offset
8250 + input_sec->output_section->vma
8251 + rel->r_offset);
8252
8253 branch_offset = destination - location;
8254 r_type = ELF64_R_TYPE (rel->r_info);
8255
8256 /* Determine if a long branch stub is needed. */
8257 max_branch_offset = 1 << 25;
8258 if (r_type != R_PPC64_REL24)
8259 max_branch_offset = 1 << 15;
8260
8261 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8262 /* We need a stub. Figure out whether a long_branch or plt_branch
8263 is needed later. */
8264 return ppc_stub_long_branch;
8265
8266 return ppc_stub_none;
8267 }
8268
8269 /* Build a .plt call stub. */
8270
8271 static inline bfd_byte *
8272 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8273 {
8274 #define PPC_LO(v) ((v) & 0xffff)
8275 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8276 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8277
8278 if (PPC_HA (offset) != 0)
8279 {
8280 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8281 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8282 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8283 if (PPC_HA (offset + 16) != PPC_HA (offset))
8284 {
8285 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8286 offset = 0;
8287 }
8288 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8289 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8290 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8291 bfd_put_32 (obfd, BCTR, p), p += 4;
8292 }
8293 else
8294 {
8295 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8296 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8297 if (PPC_HA (offset + 16) != PPC_HA (offset))
8298 {
8299 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8300 offset = 0;
8301 }
8302 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8303 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8304 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8305 bfd_put_32 (obfd, BCTR, p), p += 4;
8306 }
8307 return p;
8308 }
8309
8310 static bfd_boolean
8311 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8312 {
8313 struct ppc_stub_hash_entry *stub_entry;
8314 struct ppc_branch_hash_entry *br_entry;
8315 struct bfd_link_info *info;
8316 struct ppc_link_hash_table *htab;
8317 bfd_byte *loc;
8318 bfd_byte *p;
8319 unsigned int indx;
8320 struct plt_entry *ent;
8321 bfd_vma dest, off;
8322 int size;
8323
8324 /* Massage our args to the form they really have. */
8325 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8326 info = in_arg;
8327
8328 htab = ppc_hash_table (info);
8329
8330 /* Make a note of the offset within the stubs for this entry. */
8331 stub_entry->stub_offset = stub_entry->stub_sec->size;
8332 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8333
8334 htab->stub_count[stub_entry->stub_type - 1] += 1;
8335 switch (stub_entry->stub_type)
8336 {
8337 case ppc_stub_long_branch:
8338 case ppc_stub_long_branch_r2off:
8339 /* Branches are relative. This is where we are going to. */
8340 off = dest = (stub_entry->target_value
8341 + stub_entry->target_section->output_offset
8342 + stub_entry->target_section->output_section->vma);
8343
8344 /* And this is where we are coming from. */
8345 off -= (stub_entry->stub_offset
8346 + stub_entry->stub_sec->output_offset
8347 + stub_entry->stub_sec->output_section->vma);
8348
8349 size = 4;
8350 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8351 {
8352 bfd_vma r2off;
8353
8354 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8355 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8356 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8357 loc += 4;
8358 size = 12;
8359 if (PPC_HA (r2off) != 0)
8360 {
8361 size = 16;
8362 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8363 loc += 4;
8364 }
8365 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8366 loc += 4;
8367 off -= size - 4;
8368 }
8369 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8370
8371 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8372 {
8373 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8374 stub_entry->root.string);
8375 htab->stub_error = TRUE;
8376 return FALSE;
8377 }
8378
8379 if (info->emitrelocations)
8380 {
8381 Elf_Internal_Rela *relocs, *r;
8382 struct bfd_elf_section_data *elfsec_data;
8383
8384 elfsec_data = elf_section_data (stub_entry->stub_sec);
8385 relocs = elfsec_data->relocs;
8386 if (relocs == NULL)
8387 {
8388 bfd_size_type relsize;
8389 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8390 relocs = bfd_alloc (htab->stub_bfd, relsize);
8391 if (relocs == NULL)
8392 return FALSE;
8393 elfsec_data->relocs = relocs;
8394 elfsec_data->rel_hdr.sh_size = (stub_entry->stub_sec->reloc_count
8395 * sizeof (Elf64_External_Rela));
8396 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8397 stub_entry->stub_sec->reloc_count = 0;
8398 }
8399 r = relocs + stub_entry->stub_sec->reloc_count;
8400 stub_entry->stub_sec->reloc_count += 1;
8401 r->r_offset = loc - stub_entry->stub_sec->contents;
8402 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8403 r->r_addend = dest;
8404 if (stub_entry->h != NULL)
8405 {
8406 struct elf_link_hash_entry **hashes;
8407 unsigned long symndx;
8408 struct ppc_link_hash_entry *h;
8409
8410 hashes = elf_sym_hashes (htab->stub_bfd);
8411 if (hashes == NULL)
8412 {
8413 bfd_size_type hsize;
8414
8415 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8416 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8417 if (hashes == NULL)
8418 return FALSE;
8419 elf_sym_hashes (htab->stub_bfd) = hashes;
8420 htab->stub_globals = 1;
8421 }
8422 symndx = htab->stub_globals++;
8423 h = stub_entry->h;
8424 hashes[symndx] = &h->elf;
8425 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8426 if (h->oh != NULL && h->oh->is_func)
8427 h = h->oh;
8428 if (h->elf.root.u.def.section != stub_entry->target_section)
8429 /* H is an opd symbol. The addend must be zero. */
8430 r->r_addend = 0;
8431 else
8432 {
8433 off = (h->elf.root.u.def.value
8434 + h->elf.root.u.def.section->output_offset
8435 + h->elf.root.u.def.section->output_section->vma);
8436 r->r_addend -= off;
8437 }
8438 }
8439 }
8440 break;
8441
8442 case ppc_stub_plt_branch:
8443 case ppc_stub_plt_branch_r2off:
8444 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8445 stub_entry->root.string + 9,
8446 FALSE, FALSE);
8447 if (br_entry == NULL)
8448 {
8449 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8450 stub_entry->root.string);
8451 htab->stub_error = TRUE;
8452 return FALSE;
8453 }
8454
8455 off = (stub_entry->target_value
8456 + stub_entry->target_section->output_offset
8457 + stub_entry->target_section->output_section->vma);
8458
8459 bfd_put_64 (htab->brlt->owner, off,
8460 htab->brlt->contents + br_entry->offset);
8461
8462 if (br_entry->iter == htab->stub_iteration)
8463 {
8464 br_entry->iter = 0;
8465
8466 if (htab->relbrlt != NULL)
8467 {
8468 /* Create a reloc for the branch lookup table entry. */
8469 Elf_Internal_Rela rela;
8470 bfd_byte *rl;
8471
8472 rela.r_offset = (br_entry->offset
8473 + htab->brlt->output_offset
8474 + htab->brlt->output_section->vma);
8475 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8476 rela.r_addend = off;
8477
8478 rl = htab->relbrlt->contents;
8479 rl += (htab->relbrlt->reloc_count++
8480 * sizeof (Elf64_External_Rela));
8481 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8482 }
8483 else if (info->emitrelocations)
8484 {
8485 Elf_Internal_Rela *relocs, *r;
8486 struct bfd_elf_section_data *elfsec_data;
8487
8488 elfsec_data = elf_section_data (htab->brlt);
8489 relocs = elfsec_data->relocs;
8490 if (relocs == NULL)
8491 {
8492 bfd_size_type relsize;
8493 relsize = htab->brlt->reloc_count * sizeof (*relocs);
8494 relocs = bfd_alloc (htab->brlt->owner, relsize);
8495 if (relocs == NULL)
8496 return FALSE;
8497 elfsec_data->relocs = relocs;
8498 elfsec_data->rel_hdr.sh_size
8499 = (stub_entry->stub_sec->reloc_count
8500 * sizeof (Elf64_External_Rela));
8501 elfsec_data->rel_hdr.sh_entsize
8502 = sizeof (Elf64_External_Rela);
8503 htab->brlt->reloc_count = 0;
8504 }
8505 r = relocs + htab->brlt->reloc_count;
8506 htab->brlt->reloc_count += 1;
8507 r->r_offset = (br_entry->offset
8508 + htab->brlt->output_offset
8509 + htab->brlt->output_section->vma);
8510 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8511 r->r_addend = off;
8512 }
8513 }
8514
8515 off = (br_entry->offset
8516 + htab->brlt->output_offset
8517 + htab->brlt->output_section->vma
8518 - elf_gp (htab->brlt->output_section->owner)
8519 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8520
8521 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8522 {
8523 (*_bfd_error_handler)
8524 (_("linkage table error against `%s'"),
8525 stub_entry->root.string);
8526 bfd_set_error (bfd_error_bad_value);
8527 htab->stub_error = TRUE;
8528 return FALSE;
8529 }
8530
8531 indx = off;
8532 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8533 {
8534 if (PPC_HA (indx) != 0)
8535 {
8536 size = 16;
8537 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8538 loc += 4;
8539 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8540 }
8541 else
8542 {
8543 size = 12;
8544 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8545 }
8546 }
8547 else
8548 {
8549 bfd_vma r2off;
8550
8551 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8552 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8553 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8554 loc += 4;
8555 size = 20;
8556 if (PPC_HA (indx) != 0)
8557 {
8558 size += 4;
8559 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8560 loc += 4;
8561 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8562 loc += 4;
8563 }
8564 else
8565 {
8566 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8567 loc += 4;
8568 }
8569
8570 if (PPC_HA (r2off) != 0)
8571 {
8572 size += 4;
8573 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8574 loc += 4;
8575 }
8576 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8577 }
8578 loc += 4;
8579 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8580 loc += 4;
8581 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8582 break;
8583
8584 case ppc_stub_plt_call:
8585 /* Do the best we can for shared libraries built without
8586 exporting ".foo" for each "foo". This can happen when symbol
8587 versioning scripts strip all bar a subset of symbols. */
8588 if (stub_entry->h->oh != NULL
8589 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8590 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8591 {
8592 /* Point the symbol at the stub. There may be multiple stubs,
8593 we don't really care; The main thing is to make this sym
8594 defined somewhere. Maybe defining the symbol in the stub
8595 section is a silly idea. If we didn't do this, htab->top_id
8596 could disappear. */
8597 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8598 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8599 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8600 }
8601
8602 /* Now build the stub. */
8603 off = (bfd_vma) -1;
8604 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8605 if (ent->addend == stub_entry->addend)
8606 {
8607 off = ent->plt.offset;
8608 break;
8609 }
8610 if (off >= (bfd_vma) -2)
8611 abort ();
8612
8613 off &= ~ (bfd_vma) 1;
8614 off += (htab->plt->output_offset
8615 + htab->plt->output_section->vma
8616 - elf_gp (htab->plt->output_section->owner)
8617 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8618
8619 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8620 {
8621 (*_bfd_error_handler)
8622 (_("linkage table error against `%s'"),
8623 stub_entry->h->elf.root.root.string);
8624 bfd_set_error (bfd_error_bad_value);
8625 htab->stub_error = TRUE;
8626 return FALSE;
8627 }
8628
8629 p = build_plt_stub (htab->stub_bfd, loc, off);
8630 size = p - loc;
8631 break;
8632
8633 default:
8634 BFD_FAIL ();
8635 return FALSE;
8636 }
8637
8638 stub_entry->stub_sec->size += size;
8639
8640 if (htab->emit_stub_syms)
8641 {
8642 struct elf_link_hash_entry *h;
8643 size_t len1, len2;
8644 char *name;
8645 const char *const stub_str[] = { "long_branch",
8646 "long_branch_r2off",
8647 "plt_branch",
8648 "plt_branch_r2off",
8649 "plt_call" };
8650
8651 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8652 len2 = strlen (stub_entry->root.string);
8653 name = bfd_malloc (len1 + len2 + 2);
8654 if (name == NULL)
8655 return FALSE;
8656 memcpy (name, stub_entry->root.string, 9);
8657 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8658 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8659 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8660 if (h == NULL)
8661 return FALSE;
8662 if (h->root.type == bfd_link_hash_new)
8663 {
8664 h->root.type = bfd_link_hash_defined;
8665 h->root.u.def.section = stub_entry->stub_sec;
8666 h->root.u.def.value = stub_entry->stub_offset;
8667 h->ref_regular = 1;
8668 h->def_regular = 1;
8669 h->ref_regular_nonweak = 1;
8670 h->forced_local = 1;
8671 h->non_elf = 0;
8672 }
8673 }
8674
8675 return TRUE;
8676 }
8677
8678 /* As above, but don't actually build the stub. Just bump offset so
8679 we know stub section sizes, and select plt_branch stubs where
8680 long_branch stubs won't do. */
8681
8682 static bfd_boolean
8683 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8684 {
8685 struct ppc_stub_hash_entry *stub_entry;
8686 struct bfd_link_info *info;
8687 struct ppc_link_hash_table *htab;
8688 bfd_vma off;
8689 int size;
8690
8691 /* Massage our args to the form they really have. */
8692 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8693 info = in_arg;
8694
8695 htab = ppc_hash_table (info);
8696
8697 if (stub_entry->stub_type == ppc_stub_plt_call)
8698 {
8699 struct plt_entry *ent;
8700 off = (bfd_vma) -1;
8701 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8702 if (ent->addend == stub_entry->addend)
8703 {
8704 off = ent->plt.offset & ~(bfd_vma) 1;
8705 break;
8706 }
8707 if (off >= (bfd_vma) -2)
8708 abort ();
8709 off += (htab->plt->output_offset
8710 + htab->plt->output_section->vma
8711 - elf_gp (htab->plt->output_section->owner)
8712 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8713
8714 size = PLT_CALL_STUB_SIZE;
8715 if (PPC_HA (off) == 0)
8716 size -= 4;
8717 if (PPC_HA (off + 16) != PPC_HA (off))
8718 size += 4;
8719 }
8720 else
8721 {
8722 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8723 variants. */
8724 bfd_vma r2off = 0;
8725
8726 off = (stub_entry->target_value
8727 + stub_entry->target_section->output_offset
8728 + stub_entry->target_section->output_section->vma);
8729 off -= (stub_entry->stub_sec->size
8730 + stub_entry->stub_sec->output_offset
8731 + stub_entry->stub_sec->output_section->vma);
8732
8733 /* Reset the stub type from the plt variant in case we now
8734 can reach with a shorter stub. */
8735 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8736 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8737
8738 size = 4;
8739 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8740 {
8741 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8742 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8743 size = 12;
8744 if (PPC_HA (r2off) != 0)
8745 size = 16;
8746 off -= size - 4;
8747 }
8748
8749 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8750 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8751 {
8752 struct ppc_branch_hash_entry *br_entry;
8753 unsigned int indx;
8754
8755 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8756 stub_entry->root.string + 9,
8757 TRUE, FALSE);
8758 if (br_entry == NULL)
8759 {
8760 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8761 stub_entry->root.string);
8762 htab->stub_error = TRUE;
8763 return FALSE;
8764 }
8765
8766 if (br_entry->iter != htab->stub_iteration)
8767 {
8768 br_entry->iter = htab->stub_iteration;
8769 br_entry->offset = htab->brlt->size;
8770 htab->brlt->size += 8;
8771
8772 if (htab->relbrlt != NULL)
8773 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8774 else if (info->emitrelocations)
8775 {
8776 htab->brlt->reloc_count += 1;
8777 htab->brlt->flags |= SEC_RELOC;
8778 }
8779 }
8780
8781 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8782 off = (br_entry->offset
8783 + htab->brlt->output_offset
8784 + htab->brlt->output_section->vma
8785 - elf_gp (htab->brlt->output_section->owner)
8786 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8787
8788 indx = off;
8789 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8790 {
8791 size = 12;
8792 if (PPC_HA (indx) != 0)
8793 size = 16;
8794 }
8795 else
8796 {
8797 size = 20;
8798 if (PPC_HA (indx) != 0)
8799 size += 4;
8800
8801 if (PPC_HA (r2off) != 0)
8802 size += 4;
8803 }
8804 }
8805 else if (info->emitrelocations)
8806 {
8807 stub_entry->stub_sec->reloc_count += 1;
8808 stub_entry->stub_sec->flags |= SEC_RELOC;
8809 }
8810 }
8811
8812 stub_entry->stub_sec->size += size;
8813 return TRUE;
8814 }
8815
8816 /* Set up various things so that we can make a list of input sections
8817 for each output section included in the link. Returns -1 on error,
8818 0 when no stubs will be needed, and 1 on success. */
8819
8820 int
8821 ppc64_elf_setup_section_lists (bfd *output_bfd,
8822 struct bfd_link_info *info,
8823 int no_multi_toc)
8824 {
8825 bfd *input_bfd;
8826 int top_id, top_index, id;
8827 asection *section;
8828 asection **input_list;
8829 bfd_size_type amt;
8830 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8831
8832 htab->no_multi_toc = no_multi_toc;
8833
8834 if (htab->brlt == NULL)
8835 return 0;
8836
8837 /* Find the top input section id. */
8838 for (input_bfd = info->input_bfds, top_id = 3;
8839 input_bfd != NULL;
8840 input_bfd = input_bfd->link_next)
8841 {
8842 for (section = input_bfd->sections;
8843 section != NULL;
8844 section = section->next)
8845 {
8846 if (top_id < section->id)
8847 top_id = section->id;
8848 }
8849 }
8850
8851 htab->top_id = top_id;
8852 amt = sizeof (struct map_stub) * (top_id + 1);
8853 htab->stub_group = bfd_zmalloc (amt);
8854 if (htab->stub_group == NULL)
8855 return -1;
8856
8857 /* Set toc_off for com, und, abs and ind sections. */
8858 for (id = 0; id < 3; id++)
8859 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8860
8861 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8862
8863 /* We can't use output_bfd->section_count here to find the top output
8864 section index as some sections may have been removed, and
8865 strip_excluded_output_sections doesn't renumber the indices. */
8866 for (section = output_bfd->sections, top_index = 0;
8867 section != NULL;
8868 section = section->next)
8869 {
8870 if (top_index < section->index)
8871 top_index = section->index;
8872 }
8873
8874 htab->top_index = top_index;
8875 amt = sizeof (asection *) * (top_index + 1);
8876 input_list = bfd_zmalloc (amt);
8877 htab->input_list = input_list;
8878 if (input_list == NULL)
8879 return -1;
8880
8881 return 1;
8882 }
8883
8884 /* The linker repeatedly calls this function for each TOC input section
8885 and linker generated GOT section. Group input bfds such that the toc
8886 within a group is less than 64k in size. Will break with cute linker
8887 scripts that play games with dot in the output toc section. */
8888
8889 void
8890 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8891 {
8892 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8893
8894 if (!htab->no_multi_toc)
8895 {
8896 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8897 bfd_vma off = addr - htab->toc_curr;
8898
8899 if (off + isec->size > 0x10000)
8900 htab->toc_curr = addr;
8901
8902 elf_gp (isec->owner) = (htab->toc_curr
8903 - elf_gp (isec->output_section->owner)
8904 + TOC_BASE_OFF);
8905 }
8906 }
8907
8908 /* Called after the last call to the above function. */
8909
8910 void
8911 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8912 {
8913 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8914
8915 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8916
8917 /* toc_curr tracks the TOC offset used for code sections below in
8918 ppc64_elf_next_input_section. Start off at 0x8000. */
8919 htab->toc_curr = TOC_BASE_OFF;
8920 }
8921
8922 /* No toc references were found in ISEC. If the code in ISEC makes no
8923 calls, then there's no need to use toc adjusting stubs when branching
8924 into ISEC. Actually, indirect calls from ISEC are OK as they will
8925 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8926 needed, and 2 if a cyclical call-graph was found but no other reason
8927 for a stub was detected. If called from the top level, a return of
8928 2 means the same as a return of 0. */
8929
8930 static int
8931 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8932 {
8933 Elf_Internal_Rela *relstart, *rel;
8934 Elf_Internal_Sym *local_syms;
8935 int ret;
8936 struct ppc_link_hash_table *htab;
8937
8938 /* We know none of our code bearing sections will need toc stubs. */
8939 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8940 return 0;
8941
8942 if (isec->size == 0)
8943 return 0;
8944
8945 if (isec->output_section == NULL)
8946 return 0;
8947
8948 if (isec->reloc_count == 0)
8949 return 0;
8950
8951 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8952 info->keep_memory);
8953 if (relstart == NULL)
8954 return -1;
8955
8956 /* Look for branches to outside of this section. */
8957 local_syms = NULL;
8958 ret = 0;
8959 htab = ppc_hash_table (info);
8960 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8961 {
8962 enum elf_ppc64_reloc_type r_type;
8963 unsigned long r_symndx;
8964 struct elf_link_hash_entry *h;
8965 Elf_Internal_Sym *sym;
8966 asection *sym_sec;
8967 long *opd_adjust;
8968 bfd_vma sym_value;
8969 bfd_vma dest;
8970
8971 r_type = ELF64_R_TYPE (rel->r_info);
8972 if (r_type != R_PPC64_REL24
8973 && r_type != R_PPC64_REL14
8974 && r_type != R_PPC64_REL14_BRTAKEN
8975 && r_type != R_PPC64_REL14_BRNTAKEN)
8976 continue;
8977
8978 r_symndx = ELF64_R_SYM (rel->r_info);
8979 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8980 isec->owner))
8981 {
8982 ret = -1;
8983 break;
8984 }
8985
8986 /* Calls to dynamic lib functions go through a plt call stub
8987 that uses r2. Branches to undefined symbols might be a call
8988 using old-style dot symbols that can be satisfied by a plt
8989 call into a new-style dynamic library. */
8990 if (sym_sec == NULL)
8991 {
8992 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8993 if (eh != NULL
8994 && eh->oh != NULL
8995 && eh->oh->elf.plt.plist != NULL)
8996 {
8997 ret = 1;
8998 break;
8999 }
9000
9001 /* Ignore other undefined symbols. */
9002 continue;
9003 }
9004
9005 /* Assume branches to other sections not included in the link need
9006 stubs too, to cover -R and absolute syms. */
9007 if (sym_sec->output_section == NULL)
9008 {
9009 ret = 1;
9010 break;
9011 }
9012
9013 if (h == NULL)
9014 sym_value = sym->st_value;
9015 else
9016 {
9017 if (h->root.type != bfd_link_hash_defined
9018 && h->root.type != bfd_link_hash_defweak)
9019 abort ();
9020 sym_value = h->root.u.def.value;
9021 }
9022 sym_value += rel->r_addend;
9023
9024 /* If this branch reloc uses an opd sym, find the code section. */
9025 opd_adjust = get_opd_info (sym_sec);
9026 if (opd_adjust != NULL)
9027 {
9028 if (h == NULL)
9029 {
9030 long adjust;
9031
9032 adjust = opd_adjust[sym->st_value / 8];
9033 if (adjust == -1)
9034 /* Assume deleted functions won't ever be called. */
9035 continue;
9036 sym_value += adjust;
9037 }
9038
9039 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9040 if (dest == (bfd_vma) -1)
9041 continue;
9042 }
9043 else
9044 dest = (sym_value
9045 + sym_sec->output_offset
9046 + sym_sec->output_section->vma);
9047
9048 /* Ignore branch to self. */
9049 if (sym_sec == isec)
9050 continue;
9051
9052 /* If the called function uses the toc, we need a stub. */
9053 if (sym_sec->has_toc_reloc
9054 || sym_sec->makes_toc_func_call)
9055 {
9056 ret = 1;
9057 break;
9058 }
9059
9060 /* Assume any branch that needs a long branch stub might in fact
9061 need a plt_branch stub. A plt_branch stub uses r2. */
9062 else if (dest - (isec->output_offset
9063 + isec->output_section->vma
9064 + rel->r_offset) + (1 << 25) >= (2 << 25))
9065 {
9066 ret = 1;
9067 break;
9068 }
9069
9070 /* If calling back to a section in the process of being tested, we
9071 can't say for sure that no toc adjusting stubs are needed, so
9072 don't return zero. */
9073 else if (sym_sec->call_check_in_progress)
9074 ret = 2;
9075
9076 /* Branches to another section that itself doesn't have any TOC
9077 references are OK. Recursively call ourselves to check. */
9078 else if (sym_sec->id <= htab->top_id
9079 && htab->stub_group[sym_sec->id].toc_off == 0)
9080 {
9081 int recur;
9082
9083 /* Mark current section as indeterminate, so that other
9084 sections that call back to current won't be marked as
9085 known. */
9086 isec->call_check_in_progress = 1;
9087 recur = toc_adjusting_stub_needed (info, sym_sec);
9088 isec->call_check_in_progress = 0;
9089
9090 if (recur < 0)
9091 {
9092 /* An error. Exit. */
9093 ret = -1;
9094 break;
9095 }
9096 else if (recur <= 1)
9097 {
9098 /* Known result. Mark as checked and set section flag. */
9099 htab->stub_group[sym_sec->id].toc_off = 1;
9100 if (recur != 0)
9101 {
9102 sym_sec->makes_toc_func_call = 1;
9103 ret = 1;
9104 break;
9105 }
9106 }
9107 else
9108 {
9109 /* Unknown result. Continue checking. */
9110 ret = 2;
9111 }
9112 }
9113 }
9114
9115 if (local_syms != NULL
9116 && (elf_tdata (isec->owner)->symtab_hdr.contents
9117 != (unsigned char *) local_syms))
9118 free (local_syms);
9119 if (elf_section_data (isec)->relocs != relstart)
9120 free (relstart);
9121
9122 return ret;
9123 }
9124
9125 /* The linker repeatedly calls this function for each input section,
9126 in the order that input sections are linked into output sections.
9127 Build lists of input sections to determine groupings between which
9128 we may insert linker stubs. */
9129
9130 bfd_boolean
9131 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9132 {
9133 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9134
9135 if ((isec->output_section->flags & SEC_CODE) != 0
9136 && isec->output_section->index <= htab->top_index)
9137 {
9138 asection **list = htab->input_list + isec->output_section->index;
9139 /* Steal the link_sec pointer for our list. */
9140 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9141 /* This happens to make the list in reverse order,
9142 which is what we want. */
9143 PREV_SEC (isec) = *list;
9144 *list = isec;
9145 }
9146
9147 if (htab->multi_toc_needed)
9148 {
9149 /* If a code section has a function that uses the TOC then we need
9150 to use the right TOC (obviously). Also, make sure that .opd gets
9151 the correct TOC value for R_PPC64_TOC relocs that don't have or
9152 can't find their function symbol (shouldn't ever happen now).
9153 Also specially treat .fixup for the linux kernel. .fixup
9154 contains branches, but only back to the function that hit an
9155 exception. */
9156 if (isec->has_toc_reloc
9157 || (isec->flags & SEC_CODE) == 0
9158 || strcmp (isec->name, ".fixup") == 0)
9159 {
9160 if (elf_gp (isec->owner) != 0)
9161 htab->toc_curr = elf_gp (isec->owner);
9162 }
9163 else if (htab->stub_group[isec->id].toc_off == 0)
9164 {
9165 int ret = toc_adjusting_stub_needed (info, isec);
9166 if (ret < 0)
9167 return FALSE;
9168 else
9169 isec->makes_toc_func_call = ret & 1;
9170 }
9171 }
9172
9173 /* Functions that don't use the TOC can belong in any TOC group.
9174 Use the last TOC base. This happens to make _init and _fini
9175 pasting work. */
9176 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9177 return TRUE;
9178 }
9179
9180 /* See whether we can group stub sections together. Grouping stub
9181 sections may result in fewer stubs. More importantly, we need to
9182 put all .init* and .fini* stubs at the beginning of the .init or
9183 .fini output sections respectively, because glibc splits the
9184 _init and _fini functions into multiple parts. Putting a stub in
9185 the middle of a function is not a good idea. */
9186
9187 static void
9188 group_sections (struct ppc_link_hash_table *htab,
9189 bfd_size_type stub_group_size,
9190 bfd_boolean stubs_always_before_branch)
9191 {
9192 asection **list;
9193 bfd_size_type stub14_group_size;
9194 bfd_boolean suppress_size_errors;
9195
9196 suppress_size_errors = FALSE;
9197 stub14_group_size = stub_group_size;
9198 if (stub_group_size == 1)
9199 {
9200 /* Default values. */
9201 if (stubs_always_before_branch)
9202 {
9203 stub_group_size = 0x1e00000;
9204 stub14_group_size = 0x7800;
9205 }
9206 else
9207 {
9208 stub_group_size = 0x1c00000;
9209 stub14_group_size = 0x7000;
9210 }
9211 suppress_size_errors = TRUE;
9212 }
9213
9214 list = htab->input_list + htab->top_index;
9215 do
9216 {
9217 asection *tail = *list;
9218 while (tail != NULL)
9219 {
9220 asection *curr;
9221 asection *prev;
9222 bfd_size_type total;
9223 bfd_boolean big_sec;
9224 bfd_vma curr_toc;
9225
9226 curr = tail;
9227 total = tail->size;
9228 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9229 ? stub14_group_size : stub_group_size);
9230 if (big_sec && !suppress_size_errors)
9231 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9232 tail->owner, tail);
9233 curr_toc = htab->stub_group[tail->id].toc_off;
9234
9235 while ((prev = PREV_SEC (curr)) != NULL
9236 && ((total += curr->output_offset - prev->output_offset)
9237 < (ppc64_elf_section_data (prev)->has_14bit_branch
9238 ? stub14_group_size : stub_group_size))
9239 && htab->stub_group[prev->id].toc_off == curr_toc)
9240 curr = prev;
9241
9242 /* OK, the size from the start of CURR to the end is less
9243 than stub_group_size and thus can be handled by one stub
9244 section. (or the tail section is itself larger than
9245 stub_group_size, in which case we may be toast.) We
9246 should really be keeping track of the total size of stubs
9247 added here, as stubs contribute to the final output
9248 section size. That's a little tricky, and this way will
9249 only break if stubs added make the total size more than
9250 2^25, ie. for the default stub_group_size, if stubs total
9251 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9252 do
9253 {
9254 prev = PREV_SEC (tail);
9255 /* Set up this stub group. */
9256 htab->stub_group[tail->id].link_sec = curr;
9257 }
9258 while (tail != curr && (tail = prev) != NULL);
9259
9260 /* But wait, there's more! Input sections up to stub_group_size
9261 bytes before the stub section can be handled by it too.
9262 Don't do this if we have a really large section after the
9263 stubs, as adding more stubs increases the chance that
9264 branches may not reach into the stub section. */
9265 if (!stubs_always_before_branch && !big_sec)
9266 {
9267 total = 0;
9268 while (prev != NULL
9269 && ((total += tail->output_offset - prev->output_offset)
9270 < (ppc64_elf_section_data (prev)->has_14bit_branch
9271 ? stub14_group_size : stub_group_size))
9272 && htab->stub_group[prev->id].toc_off == curr_toc)
9273 {
9274 tail = prev;
9275 prev = PREV_SEC (tail);
9276 htab->stub_group[tail->id].link_sec = curr;
9277 }
9278 }
9279 tail = prev;
9280 }
9281 }
9282 while (list-- != htab->input_list);
9283 free (htab->input_list);
9284 #undef PREV_SEC
9285 }
9286
9287 /* Determine and set the size of the stub section for a final link.
9288
9289 The basic idea here is to examine all the relocations looking for
9290 PC-relative calls to a target that is unreachable with a "bl"
9291 instruction. */
9292
9293 bfd_boolean
9294 ppc64_elf_size_stubs (bfd *output_bfd,
9295 struct bfd_link_info *info,
9296 bfd_signed_vma group_size,
9297 asection *(*add_stub_section) (const char *, asection *),
9298 void (*layout_sections_again) (void))
9299 {
9300 bfd_size_type stub_group_size;
9301 bfd_boolean stubs_always_before_branch;
9302 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9303
9304 /* Stash our params away. */
9305 htab->add_stub_section = add_stub_section;
9306 htab->layout_sections_again = layout_sections_again;
9307 stubs_always_before_branch = group_size < 0;
9308 if (group_size < 0)
9309 stub_group_size = -group_size;
9310 else
9311 stub_group_size = group_size;
9312
9313 group_sections (htab, stub_group_size, stubs_always_before_branch);
9314
9315 while (1)
9316 {
9317 bfd *input_bfd;
9318 unsigned int bfd_indx;
9319 asection *stub_sec;
9320
9321 htab->stub_iteration += 1;
9322
9323 for (input_bfd = info->input_bfds, bfd_indx = 0;
9324 input_bfd != NULL;
9325 input_bfd = input_bfd->link_next, bfd_indx++)
9326 {
9327 Elf_Internal_Shdr *symtab_hdr;
9328 asection *section;
9329 Elf_Internal_Sym *local_syms = NULL;
9330
9331 if (!is_ppc64_elf_target (input_bfd->xvec))
9332 continue;
9333
9334 /* We'll need the symbol table in a second. */
9335 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9336 if (symtab_hdr->sh_info == 0)
9337 continue;
9338
9339 /* Walk over each section attached to the input bfd. */
9340 for (section = input_bfd->sections;
9341 section != NULL;
9342 section = section->next)
9343 {
9344 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9345
9346 /* If there aren't any relocs, then there's nothing more
9347 to do. */
9348 if ((section->flags & SEC_RELOC) == 0
9349 || (section->flags & SEC_ALLOC) == 0
9350 || (section->flags & SEC_LOAD) == 0
9351 || (section->flags & SEC_CODE) == 0
9352 || section->reloc_count == 0)
9353 continue;
9354
9355 /* If this section is a link-once section that will be
9356 discarded, then don't create any stubs. */
9357 if (section->output_section == NULL
9358 || section->output_section->owner != output_bfd)
9359 continue;
9360
9361 /* Get the relocs. */
9362 internal_relocs
9363 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9364 info->keep_memory);
9365 if (internal_relocs == NULL)
9366 goto error_ret_free_local;
9367
9368 /* Now examine each relocation. */
9369 irela = internal_relocs;
9370 irelaend = irela + section->reloc_count;
9371 for (; irela < irelaend; irela++)
9372 {
9373 enum elf_ppc64_reloc_type r_type;
9374 unsigned int r_indx;
9375 enum ppc_stub_type stub_type;
9376 struct ppc_stub_hash_entry *stub_entry;
9377 asection *sym_sec, *code_sec;
9378 bfd_vma sym_value;
9379 bfd_vma destination;
9380 bfd_boolean ok_dest;
9381 struct ppc_link_hash_entry *hash;
9382 struct ppc_link_hash_entry *fdh;
9383 struct elf_link_hash_entry *h;
9384 Elf_Internal_Sym *sym;
9385 char *stub_name;
9386 const asection *id_sec;
9387 long *opd_adjust;
9388
9389 r_type = ELF64_R_TYPE (irela->r_info);
9390 r_indx = ELF64_R_SYM (irela->r_info);
9391
9392 if (r_type >= R_PPC64_max)
9393 {
9394 bfd_set_error (bfd_error_bad_value);
9395 goto error_ret_free_internal;
9396 }
9397
9398 /* Only look for stubs on branch instructions. */
9399 if (r_type != R_PPC64_REL24
9400 && r_type != R_PPC64_REL14
9401 && r_type != R_PPC64_REL14_BRTAKEN
9402 && r_type != R_PPC64_REL14_BRNTAKEN)
9403 continue;
9404
9405 /* Now determine the call target, its name, value,
9406 section. */
9407 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9408 r_indx, input_bfd))
9409 goto error_ret_free_internal;
9410 hash = (struct ppc_link_hash_entry *) h;
9411
9412 ok_dest = FALSE;
9413 fdh = NULL;
9414 sym_value = 0;
9415 if (hash == NULL)
9416 {
9417 sym_value = sym->st_value;
9418 ok_dest = TRUE;
9419 }
9420 else if (hash->elf.root.type == bfd_link_hash_defined
9421 || hash->elf.root.type == bfd_link_hash_defweak)
9422 {
9423 sym_value = hash->elf.root.u.def.value;
9424 if (sym_sec->output_section != NULL)
9425 ok_dest = TRUE;
9426 }
9427 else if (hash->elf.root.type == bfd_link_hash_undefweak
9428 || hash->elf.root.type == bfd_link_hash_undefined)
9429 {
9430 /* Recognise an old ABI func code entry sym, and
9431 use the func descriptor sym instead if it is
9432 defined. */
9433 if (hash->elf.root.root.string[0] == '.'
9434 && (fdh = get_fdh (hash, htab)) != NULL)
9435 {
9436 if (fdh->elf.root.type == bfd_link_hash_defined
9437 || fdh->elf.root.type == bfd_link_hash_defweak)
9438 {
9439 sym_sec = fdh->elf.root.u.def.section;
9440 sym_value = fdh->elf.root.u.def.value;
9441 if (sym_sec->output_section != NULL)
9442 ok_dest = TRUE;
9443 }
9444 else
9445 fdh = NULL;
9446 }
9447 }
9448 else
9449 {
9450 bfd_set_error (bfd_error_bad_value);
9451 goto error_ret_free_internal;
9452 }
9453
9454 destination = 0;
9455 if (ok_dest)
9456 {
9457 sym_value += irela->r_addend;
9458 destination = (sym_value
9459 + sym_sec->output_offset
9460 + sym_sec->output_section->vma);
9461 }
9462
9463 code_sec = sym_sec;
9464 opd_adjust = get_opd_info (sym_sec);
9465 if (opd_adjust != NULL)
9466 {
9467 bfd_vma dest;
9468
9469 if (hash == NULL)
9470 {
9471 long adjust = opd_adjust[sym_value / 8];
9472 if (adjust == -1)
9473 continue;
9474 sym_value += adjust;
9475 }
9476 dest = opd_entry_value (sym_sec, sym_value,
9477 &code_sec, &sym_value);
9478 if (dest != (bfd_vma) -1)
9479 {
9480 destination = dest;
9481 if (fdh != NULL)
9482 {
9483 /* Fixup old ABI sym to point at code
9484 entry. */
9485 hash->elf.root.type = bfd_link_hash_defweak;
9486 hash->elf.root.u.def.section = code_sec;
9487 hash->elf.root.u.def.value = sym_value;
9488 }
9489 }
9490 }
9491
9492 /* Determine what (if any) linker stub is needed. */
9493 stub_type = ppc_type_of_stub (section, irela, &hash,
9494 destination);
9495
9496 if (stub_type != ppc_stub_plt_call)
9497 {
9498 /* Check whether we need a TOC adjusting stub.
9499 Since the linker pastes together pieces from
9500 different object files when creating the
9501 _init and _fini functions, it may be that a
9502 call to what looks like a local sym is in
9503 fact a call needing a TOC adjustment. */
9504 if (code_sec != NULL
9505 && code_sec->output_section != NULL
9506 && (htab->stub_group[code_sec->id].toc_off
9507 != htab->stub_group[section->id].toc_off)
9508 && (code_sec->has_toc_reloc
9509 || code_sec->makes_toc_func_call))
9510 stub_type = ppc_stub_long_branch_r2off;
9511 }
9512
9513 if (stub_type == ppc_stub_none)
9514 continue;
9515
9516 /* __tls_get_addr calls might be eliminated. */
9517 if (stub_type != ppc_stub_plt_call
9518 && hash != NULL
9519 && (hash == htab->tls_get_addr
9520 || hash == htab->tls_get_addr_fd)
9521 && section->has_tls_reloc
9522 && irela != internal_relocs)
9523 {
9524 /* Get tls info. */
9525 char *tls_mask;
9526
9527 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9528 irela - 1, input_bfd))
9529 goto error_ret_free_internal;
9530 if (*tls_mask != 0)
9531 continue;
9532 }
9533
9534 /* Support for grouping stub sections. */
9535 id_sec = htab->stub_group[section->id].link_sec;
9536
9537 /* Get the name of this stub. */
9538 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9539 if (!stub_name)
9540 goto error_ret_free_internal;
9541
9542 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9543 stub_name, FALSE, FALSE);
9544 if (stub_entry != NULL)
9545 {
9546 /* The proper stub has already been created. */
9547 free (stub_name);
9548 continue;
9549 }
9550
9551 stub_entry = ppc_add_stub (stub_name, section, htab);
9552 if (stub_entry == NULL)
9553 {
9554 free (stub_name);
9555 error_ret_free_internal:
9556 if (elf_section_data (section)->relocs == NULL)
9557 free (internal_relocs);
9558 error_ret_free_local:
9559 if (local_syms != NULL
9560 && (symtab_hdr->contents
9561 != (unsigned char *) local_syms))
9562 free (local_syms);
9563 return FALSE;
9564 }
9565
9566 stub_entry->stub_type = stub_type;
9567 stub_entry->target_value = sym_value;
9568 stub_entry->target_section = code_sec;
9569 stub_entry->h = hash;
9570 stub_entry->addend = irela->r_addend;
9571
9572 if (stub_entry->h != NULL)
9573 htab->stub_globals += 1;
9574 }
9575
9576 /* We're done with the internal relocs, free them. */
9577 if (elf_section_data (section)->relocs != internal_relocs)
9578 free (internal_relocs);
9579 }
9580
9581 if (local_syms != NULL
9582 && symtab_hdr->contents != (unsigned char *) local_syms)
9583 {
9584 if (!info->keep_memory)
9585 free (local_syms);
9586 else
9587 symtab_hdr->contents = (unsigned char *) local_syms;
9588 }
9589 }
9590
9591 /* We may have added some stubs. Find out the new size of the
9592 stub sections. */
9593 for (stub_sec = htab->stub_bfd->sections;
9594 stub_sec != NULL;
9595 stub_sec = stub_sec->next)
9596 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9597 {
9598 stub_sec->rawsize = stub_sec->size;
9599 stub_sec->size = 0;
9600 stub_sec->reloc_count = 0;
9601 stub_sec->flags &= ~SEC_RELOC;
9602 }
9603
9604 htab->brlt->size = 0;
9605 htab->brlt->reloc_count = 0;
9606 htab->brlt->flags &= ~SEC_RELOC;
9607 if (htab->relbrlt != NULL)
9608 htab->relbrlt->size = 0;
9609
9610 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9611
9612 for (stub_sec = htab->stub_bfd->sections;
9613 stub_sec != NULL;
9614 stub_sec = stub_sec->next)
9615 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9616 && stub_sec->rawsize != stub_sec->size)
9617 break;
9618
9619 /* Exit from this loop when no stubs have been added, and no stubs
9620 have changed size. */
9621 if (stub_sec == NULL)
9622 break;
9623
9624 /* Ask the linker to do its stuff. */
9625 (*htab->layout_sections_again) ();
9626 }
9627
9628 /* It would be nice to strip htab->brlt from the output if the
9629 section is empty, but it's too late. If we strip sections here,
9630 the dynamic symbol table is corrupted since the section symbol
9631 for the stripped section isn't written. */
9632
9633 return TRUE;
9634 }
9635
9636 /* Called after we have determined section placement. If sections
9637 move, we'll be called again. Provide a value for TOCstart. */
9638
9639 bfd_vma
9640 ppc64_elf_toc (bfd *obfd)
9641 {
9642 asection *s;
9643 bfd_vma TOCstart;
9644
9645 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9646 order. The TOC starts where the first of these sections starts. */
9647 s = bfd_get_section_by_name (obfd, ".got");
9648 if (s == NULL)
9649 s = bfd_get_section_by_name (obfd, ".toc");
9650 if (s == NULL)
9651 s = bfd_get_section_by_name (obfd, ".tocbss");
9652 if (s == NULL)
9653 s = bfd_get_section_by_name (obfd, ".plt");
9654 if (s == NULL)
9655 {
9656 /* This may happen for
9657 o references to TOC base (SYM@toc / TOC[tc0]) without a
9658 .toc directive
9659 o bad linker script
9660 o --gc-sections and empty TOC sections
9661
9662 FIXME: Warn user? */
9663
9664 /* Look for a likely section. We probably won't even be
9665 using TOCstart. */
9666 for (s = obfd->sections; s != NULL; s = s->next)
9667 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9668 == (SEC_ALLOC | SEC_SMALL_DATA))
9669 break;
9670 if (s == NULL)
9671 for (s = obfd->sections; s != NULL; s = s->next)
9672 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9673 == (SEC_ALLOC | SEC_SMALL_DATA))
9674 break;
9675 if (s == NULL)
9676 for (s = obfd->sections; s != NULL; s = s->next)
9677 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9678 break;
9679 if (s == NULL)
9680 for (s = obfd->sections; s != NULL; s = s->next)
9681 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9682 break;
9683 }
9684
9685 TOCstart = 0;
9686 if (s != NULL)
9687 TOCstart = s->output_section->vma + s->output_offset;
9688
9689 return TOCstart;
9690 }
9691
9692 /* Build all the stubs associated with the current output file.
9693 The stubs are kept in a hash table attached to the main linker
9694 hash table. This function is called via gldelf64ppc_finish. */
9695
9696 bfd_boolean
9697 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9698 struct bfd_link_info *info,
9699 char **stats)
9700 {
9701 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9702 asection *stub_sec;
9703 bfd_byte *p;
9704 int stub_sec_count = 0;
9705
9706 htab->emit_stub_syms = emit_stub_syms;
9707
9708 /* Allocate memory to hold the linker stubs. */
9709 for (stub_sec = htab->stub_bfd->sections;
9710 stub_sec != NULL;
9711 stub_sec = stub_sec->next)
9712 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9713 && stub_sec->size != 0)
9714 {
9715 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9716 if (stub_sec->contents == NULL)
9717 return FALSE;
9718 /* We want to check that built size is the same as calculated
9719 size. rawsize is a convenient location to use. */
9720 stub_sec->rawsize = stub_sec->size;
9721 stub_sec->size = 0;
9722 }
9723
9724 if (htab->glink != NULL && htab->glink->size != 0)
9725 {
9726 unsigned int indx;
9727 bfd_vma plt0;
9728
9729 /* Build the .glink plt call stub. */
9730 if (htab->emit_stub_syms)
9731 {
9732 struct elf_link_hash_entry *h;
9733 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9734 if (h == NULL)
9735 return FALSE;
9736 if (h->root.type == bfd_link_hash_new)
9737 {
9738 h->root.type = bfd_link_hash_defined;
9739 h->root.u.def.section = htab->glink;
9740 h->root.u.def.value = 8;
9741 h->ref_regular = 1;
9742 h->def_regular = 1;
9743 h->ref_regular_nonweak = 1;
9744 h->forced_local = 1;
9745 h->non_elf = 0;
9746 }
9747 }
9748 p = htab->glink->contents;
9749 plt0 = (htab->plt->output_section->vma
9750 + htab->plt->output_offset
9751 - (htab->glink->output_section->vma
9752 + htab->glink->output_offset
9753 + 16));
9754 bfd_put_64 (htab->glink->owner, plt0, p);
9755 p += 8;
9756 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9757 p += 4;
9758 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9759 p += 4;
9760 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9761 p += 4;
9762 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9763 p += 4;
9764 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9765 p += 4;
9766 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9767 p += 4;
9768 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9769 p += 4;
9770 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9771 p += 4;
9772 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9773 p += 4;
9774 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9775 p += 4;
9776 bfd_put_32 (htab->glink->owner, BCTR, p);
9777 p += 4;
9778 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9779 {
9780 bfd_put_32 (htab->glink->owner, NOP, p);
9781 p += 4;
9782 }
9783
9784 /* Build the .glink lazy link call stubs. */
9785 indx = 0;
9786 while (p < htab->glink->contents + htab->glink->size)
9787 {
9788 if (indx < 0x8000)
9789 {
9790 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9791 p += 4;
9792 }
9793 else
9794 {
9795 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9796 p += 4;
9797 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9798 p += 4;
9799 }
9800 bfd_put_32 (htab->glink->owner,
9801 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9802 indx++;
9803 p += 4;
9804 }
9805 htab->glink->rawsize = p - htab->glink->contents;
9806 }
9807
9808 if (htab->brlt->size != 0)
9809 {
9810 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9811 htab->brlt->size);
9812 if (htab->brlt->contents == NULL)
9813 return FALSE;
9814 }
9815 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9816 {
9817 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9818 htab->relbrlt->size);
9819 if (htab->relbrlt->contents == NULL)
9820 return FALSE;
9821 }
9822
9823 /* Build the stubs as directed by the stub hash table. */
9824 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9825
9826 if (htab->relbrlt != NULL)
9827 htab->relbrlt->reloc_count = 0;
9828
9829 for (stub_sec = htab->stub_bfd->sections;
9830 stub_sec != NULL;
9831 stub_sec = stub_sec->next)
9832 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9833 {
9834 stub_sec_count += 1;
9835 if (stub_sec->rawsize != stub_sec->size)
9836 break;
9837 }
9838
9839 if (stub_sec != NULL
9840 || htab->glink->rawsize != htab->glink->size)
9841 {
9842 htab->stub_error = TRUE;
9843 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9844 }
9845
9846 if (htab->stub_error)
9847 return FALSE;
9848
9849 if (stats != NULL)
9850 {
9851 *stats = bfd_malloc (500);
9852 if (*stats == NULL)
9853 return FALSE;
9854
9855 sprintf (*stats, _("linker stubs in %u group%s\n"
9856 " branch %lu\n"
9857 " toc adjust %lu\n"
9858 " long branch %lu\n"
9859 " long toc adj %lu\n"
9860 " plt call %lu"),
9861 stub_sec_count,
9862 stub_sec_count == 1 ? "" : "s",
9863 htab->stub_count[ppc_stub_long_branch - 1],
9864 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9865 htab->stub_count[ppc_stub_plt_branch - 1],
9866 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9867 htab->stub_count[ppc_stub_plt_call - 1]);
9868 }
9869 return TRUE;
9870 }
9871
9872 /* This function undoes the changes made by add_symbol_adjust. */
9873
9874 static bfd_boolean
9875 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9876 {
9877 struct ppc_link_hash_entry *eh;
9878
9879 if (h->root.type == bfd_link_hash_indirect)
9880 return TRUE;
9881
9882 if (h->root.type == bfd_link_hash_warning)
9883 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9884
9885 eh = (struct ppc_link_hash_entry *) h;
9886 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9887 return TRUE;
9888
9889 eh->elf.root.type = bfd_link_hash_undefined;
9890 return TRUE;
9891 }
9892
9893 void
9894 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9895 {
9896 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9897 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9898 }
9899
9900 /* What to do when ld finds relocations against symbols defined in
9901 discarded sections. */
9902
9903 static unsigned int
9904 ppc64_elf_action_discarded (asection *sec)
9905 {
9906 if (strcmp (".opd", sec->name) == 0)
9907 return 0;
9908
9909 if (strcmp (".toc", sec->name) == 0)
9910 return 0;
9911
9912 if (strcmp (".toc1", sec->name) == 0)
9913 return 0;
9914
9915 return _bfd_elf_default_action_discarded (sec);
9916 }
9917
9918 /* The RELOCATE_SECTION function is called by the ELF backend linker
9919 to handle the relocations for a section.
9920
9921 The relocs are always passed as Rela structures; if the section
9922 actually uses Rel structures, the r_addend field will always be
9923 zero.
9924
9925 This function is responsible for adjust the section contents as
9926 necessary, and (if using Rela relocs and generating a
9927 relocatable output file) adjusting the reloc addend as
9928 necessary.
9929
9930 This function does not have to worry about setting the reloc
9931 address or the reloc symbol index.
9932
9933 LOCAL_SYMS is a pointer to the swapped in local symbols.
9934
9935 LOCAL_SECTIONS is an array giving the section in the input file
9936 corresponding to the st_shndx field of each local symbol.
9937
9938 The global hash table entry for the global symbols can be found
9939 via elf_sym_hashes (input_bfd).
9940
9941 When generating relocatable output, this function must handle
9942 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9943 going to be the section symbol corresponding to the output
9944 section, which means that the addend must be adjusted
9945 accordingly. */
9946
9947 static bfd_boolean
9948 ppc64_elf_relocate_section (bfd *output_bfd,
9949 struct bfd_link_info *info,
9950 bfd *input_bfd,
9951 asection *input_section,
9952 bfd_byte *contents,
9953 Elf_Internal_Rela *relocs,
9954 Elf_Internal_Sym *local_syms,
9955 asection **local_sections)
9956 {
9957 struct ppc_link_hash_table *htab;
9958 Elf_Internal_Shdr *symtab_hdr;
9959 struct elf_link_hash_entry **sym_hashes;
9960 Elf_Internal_Rela *rel;
9961 Elf_Internal_Rela *relend;
9962 Elf_Internal_Rela outrel;
9963 bfd_byte *loc;
9964 struct got_entry **local_got_ents;
9965 bfd_vma TOCstart;
9966 bfd_boolean ret = TRUE;
9967 bfd_boolean is_opd;
9968 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9969 bfd_boolean is_power4 = FALSE;
9970 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
9971
9972 /* Initialize howto table if needed. */
9973 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9974 ppc_howto_init ();
9975
9976 htab = ppc_hash_table (info);
9977
9978 /* Don't relocate stub sections. */
9979 if (input_section->owner == htab->stub_bfd)
9980 return TRUE;
9981
9982 local_got_ents = elf_local_got_ents (input_bfd);
9983 TOCstart = elf_gp (output_bfd);
9984 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9985 sym_hashes = elf_sym_hashes (input_bfd);
9986 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
9987
9988 rel = relocs;
9989 relend = relocs + input_section->reloc_count;
9990 for (; rel < relend; rel++)
9991 {
9992 enum elf_ppc64_reloc_type r_type;
9993 bfd_vma addend, orig_addend;
9994 bfd_reloc_status_type r;
9995 Elf_Internal_Sym *sym;
9996 asection *sec;
9997 struct elf_link_hash_entry *h_elf;
9998 struct ppc_link_hash_entry *h;
9999 struct ppc_link_hash_entry *fdh;
10000 const char *sym_name;
10001 unsigned long r_symndx, toc_symndx;
10002 char tls_mask, tls_gd, tls_type;
10003 char sym_type;
10004 bfd_vma relocation;
10005 bfd_boolean unresolved_reloc;
10006 bfd_boolean warned;
10007 unsigned long insn, mask;
10008 struct ppc_stub_hash_entry *stub_entry;
10009 bfd_vma max_br_offset;
10010 bfd_vma from;
10011
10012 r_type = ELF64_R_TYPE (rel->r_info);
10013 r_symndx = ELF64_R_SYM (rel->r_info);
10014
10015 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10016 symbol of the previous ADDR64 reloc. The symbol gives us the
10017 proper TOC base to use. */
10018 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10019 && rel != relocs
10020 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10021 && is_opd)
10022 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10023
10024 sym = NULL;
10025 sec = NULL;
10026 h_elf = NULL;
10027 sym_name = NULL;
10028 unresolved_reloc = FALSE;
10029 warned = FALSE;
10030 orig_addend = rel->r_addend;
10031
10032 if (r_symndx < symtab_hdr->sh_info)
10033 {
10034 /* It's a local symbol. */
10035 long *opd_adjust;
10036
10037 sym = local_syms + r_symndx;
10038 sec = local_sections[r_symndx];
10039 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10040 sym_type = ELF64_ST_TYPE (sym->st_info);
10041 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10042 opd_adjust = get_opd_info (sec);
10043 if (opd_adjust != NULL)
10044 {
10045 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
10046 if (adjust == -1)
10047 relocation = 0;
10048 else
10049 {
10050 /* If this is a relocation against the opd section sym
10051 and we have edited .opd, adjust the reloc addend so
10052 that ld -r and ld --emit-relocs output is correct.
10053 If it is a reloc against some other .opd symbol,
10054 then the symbol value will be adjusted later. */
10055 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10056 rel->r_addend += adjust;
10057 else
10058 relocation += adjust;
10059 }
10060 }
10061 }
10062 else
10063 {
10064 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10065 r_symndx, symtab_hdr, sym_hashes,
10066 h_elf, sec, relocation,
10067 unresolved_reloc, warned);
10068 sym_name = h_elf->root.root.string;
10069 sym_type = h_elf->type;
10070 }
10071 h = (struct ppc_link_hash_entry *) h_elf;
10072
10073 if (sec != NULL && elf_discarded_section (sec))
10074 {
10075 /* For relocs against symbols from removed linkonce sections,
10076 or sections discarded by a linker script, we just want the
10077 section contents zeroed. Avoid any special processing. */
10078 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10079 contents + rel->r_offset);
10080 rel->r_info = 0;
10081 rel->r_addend = 0;
10082 continue;
10083 }
10084
10085 if (info->relocatable)
10086 continue;
10087
10088 /* TLS optimizations. Replace instruction sequences and relocs
10089 based on information we collected in tls_optimize. We edit
10090 RELOCS so that --emit-relocs will output something sensible
10091 for the final instruction stream. */
10092 tls_mask = 0;
10093 tls_gd = 0;
10094 toc_symndx = 0;
10095 if (IS_PPC64_TLS_RELOC (r_type))
10096 {
10097 if (h != NULL)
10098 tls_mask = h->tls_mask;
10099 else if (local_got_ents != NULL)
10100 {
10101 char *lgot_masks;
10102 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10103 tls_mask = lgot_masks[r_symndx];
10104 }
10105 if (tls_mask == 0 && r_type == R_PPC64_TLS)
10106 {
10107 /* Check for toc tls entries. */
10108 char *toc_tls;
10109
10110 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10111 rel, input_bfd))
10112 return FALSE;
10113
10114 if (toc_tls)
10115 tls_mask = *toc_tls;
10116 }
10117 }
10118
10119 /* Check that tls relocs are used with tls syms, and non-tls
10120 relocs are used with non-tls syms. */
10121 if (r_symndx != 0
10122 && r_type != R_PPC64_NONE
10123 && (h == NULL
10124 || h->elf.root.type == bfd_link_hash_defined
10125 || h->elf.root.type == bfd_link_hash_defweak)
10126 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
10127 {
10128 if (r_type == R_PPC64_TLS && tls_mask != 0)
10129 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10130 ;
10131 else
10132 (*_bfd_error_handler)
10133 (sym_type == STT_TLS
10134 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10135 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10136 input_bfd,
10137 input_section,
10138 (long) rel->r_offset,
10139 ppc64_elf_howto_table[r_type]->name,
10140 sym_name);
10141 }
10142
10143 /* Ensure reloc mapping code below stays sane. */
10144 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10145 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10146 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10147 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10148 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10149 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10150 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10151 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10152 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10153 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10154 abort ();
10155
10156 switch (r_type)
10157 {
10158 default:
10159 break;
10160
10161 case R_PPC64_TOC16:
10162 case R_PPC64_TOC16_LO:
10163 case R_PPC64_TOC16_DS:
10164 case R_PPC64_TOC16_LO_DS:
10165 {
10166 /* Check for toc tls entries. */
10167 char *toc_tls;
10168 int retval;
10169
10170 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10171 rel, input_bfd);
10172 if (retval == 0)
10173 return FALSE;
10174
10175 if (toc_tls)
10176 {
10177 tls_mask = *toc_tls;
10178 if (r_type == R_PPC64_TOC16_DS
10179 || r_type == R_PPC64_TOC16_LO_DS)
10180 {
10181 if (tls_mask != 0
10182 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10183 goto toctprel;
10184 }
10185 else
10186 {
10187 /* If we found a GD reloc pair, then we might be
10188 doing a GD->IE transition. */
10189 if (retval == 2)
10190 {
10191 tls_gd = TLS_TPRELGD;
10192 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10193 goto tls_ldgd_opt;
10194 }
10195 else if (retval == 3)
10196 {
10197 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10198 goto tls_ldgd_opt;
10199 }
10200 }
10201 }
10202 }
10203 break;
10204
10205 case R_PPC64_GOT_TPREL16_DS:
10206 case R_PPC64_GOT_TPREL16_LO_DS:
10207 if (tls_mask != 0
10208 && (tls_mask & TLS_TPREL) == 0)
10209 {
10210 toctprel:
10211 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10212 insn &= 31 << 21;
10213 insn |= 0x3c0d0000; /* addis 0,13,0 */
10214 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10215 r_type = R_PPC64_TPREL16_HA;
10216 if (toc_symndx != 0)
10217 {
10218 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10219 /* We changed the symbol. Start over in order to
10220 get h, sym, sec etc. right. */
10221 rel--;
10222 continue;
10223 }
10224 else
10225 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10226 }
10227 break;
10228
10229 case R_PPC64_TLS:
10230 if (tls_mask != 0
10231 && (tls_mask & TLS_TPREL) == 0)
10232 {
10233 bfd_vma rtra;
10234 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10235 if ((insn & ((0x3f << 26) | (31 << 11)))
10236 == ((31 << 26) | (13 << 11)))
10237 rtra = insn & ((1 << 26) - (1 << 16));
10238 else if ((insn & ((0x3f << 26) | (31 << 16)))
10239 == ((31 << 26) | (13 << 16)))
10240 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10241 else
10242 abort ();
10243 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10244 /* add -> addi. */
10245 insn = 14 << 26;
10246 else if ((insn & (31 << 1)) == 23 << 1
10247 && ((insn & (31 << 6)) < 14 << 6
10248 || ((insn & (31 << 6)) >= 16 << 6
10249 && (insn & (31 << 6)) < 24 << 6)))
10250 /* load and store indexed -> dform. */
10251 insn = (32 | ((insn >> 6) & 31)) << 26;
10252 else if ((insn & (31 << 1)) == 21 << 1
10253 && (insn & (0x1a << 6)) == 0)
10254 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10255 insn = (((58 | ((insn >> 6) & 4)) << 26)
10256 | ((insn >> 6) & 1));
10257 else if ((insn & (31 << 1)) == 21 << 1
10258 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10259 /* lwax -> lwa. */
10260 insn = (58 << 26) | 2;
10261 else
10262 abort ();
10263 insn |= rtra;
10264 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10265 /* Was PPC64_TLS which sits on insn boundary, now
10266 PPC64_TPREL16_LO which is at low-order half-word. */
10267 rel->r_offset += d_offset;
10268 r_type = R_PPC64_TPREL16_LO;
10269 if (toc_symndx != 0)
10270 {
10271 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10272 /* We changed the symbol. Start over in order to
10273 get h, sym, sec etc. right. */
10274 rel--;
10275 continue;
10276 }
10277 else
10278 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10279 }
10280 break;
10281
10282 case R_PPC64_GOT_TLSGD16_HI:
10283 case R_PPC64_GOT_TLSGD16_HA:
10284 tls_gd = TLS_TPRELGD;
10285 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10286 goto tls_gdld_hi;
10287 break;
10288
10289 case R_PPC64_GOT_TLSLD16_HI:
10290 case R_PPC64_GOT_TLSLD16_HA:
10291 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10292 {
10293 tls_gdld_hi:
10294 if ((tls_mask & tls_gd) != 0)
10295 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10296 + R_PPC64_GOT_TPREL16_DS);
10297 else
10298 {
10299 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10300 rel->r_offset -= d_offset;
10301 r_type = R_PPC64_NONE;
10302 }
10303 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10304 }
10305 break;
10306
10307 case R_PPC64_GOT_TLSGD16:
10308 case R_PPC64_GOT_TLSGD16_LO:
10309 tls_gd = TLS_TPRELGD;
10310 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10311 goto tls_ldgd_opt;
10312 break;
10313
10314 case R_PPC64_GOT_TLSLD16:
10315 case R_PPC64_GOT_TLSLD16_LO:
10316 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10317 {
10318 bfd_vma insn1, insn2, insn3;
10319 bfd_vma offset;
10320
10321 tls_ldgd_opt:
10322 /* We know that the next reloc is on a tls_get_addr
10323 call, since ppc64_elf_tls_optimize checks this. */
10324 offset = rel[1].r_offset;
10325 insn1 = bfd_get_32 (output_bfd,
10326 contents + rel->r_offset - d_offset);
10327 insn3 = bfd_get_32 (output_bfd,
10328 contents + offset + 4);
10329 if ((tls_mask & tls_gd) != 0)
10330 {
10331 /* IE */
10332 insn1 &= (1 << 26) - (1 << 2);
10333 insn1 |= 58 << 26; /* ld */
10334 insn2 = 0x7c636a14; /* add 3,3,13 */
10335 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10336 R_PPC64_NONE);
10337 if ((tls_mask & TLS_EXPLICIT) == 0)
10338 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10339 + R_PPC64_GOT_TPREL16_DS);
10340 else
10341 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10342 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10343 }
10344 else
10345 {
10346 /* LE */
10347 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10348 insn2 = 0x38630000; /* addi 3,3,0 */
10349 if (tls_gd == 0)
10350 {
10351 /* Was an LD reloc. */
10352 r_symndx = 0;
10353 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10354 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10355 }
10356 else if (toc_symndx != 0)
10357 r_symndx = toc_symndx;
10358 r_type = R_PPC64_TPREL16_HA;
10359 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10360 rel[1].r_info = ELF64_R_INFO (r_symndx,
10361 R_PPC64_TPREL16_LO);
10362 rel[1].r_offset += d_offset;
10363 }
10364 if (insn3 == NOP
10365 || insn3 == CROR_151515 || insn3 == CROR_313131)
10366 {
10367 insn3 = insn2;
10368 insn2 = NOP;
10369 rel[1].r_offset += 4;
10370 }
10371 bfd_put_32 (output_bfd, insn1,
10372 contents + rel->r_offset - d_offset);
10373 bfd_put_32 (output_bfd, insn2, contents + offset);
10374 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10375 if (tls_gd == 0 || toc_symndx != 0)
10376 {
10377 /* We changed the symbol. Start over in order
10378 to get h, sym, sec etc. right. */
10379 rel--;
10380 continue;
10381 }
10382 }
10383 break;
10384
10385 case R_PPC64_DTPMOD64:
10386 if (rel + 1 < relend
10387 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10388 && rel[1].r_offset == rel->r_offset + 8)
10389 {
10390 if ((tls_mask & TLS_GD) == 0)
10391 {
10392 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10393 if ((tls_mask & TLS_TPRELGD) != 0)
10394 r_type = R_PPC64_TPREL64;
10395 else
10396 {
10397 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10398 r_type = R_PPC64_NONE;
10399 }
10400 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10401 }
10402 }
10403 else
10404 {
10405 if ((tls_mask & TLS_LD) == 0)
10406 {
10407 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10408 r_type = R_PPC64_NONE;
10409 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10410 }
10411 }
10412 break;
10413
10414 case R_PPC64_TPREL64:
10415 if ((tls_mask & TLS_TPREL) == 0)
10416 {
10417 r_type = R_PPC64_NONE;
10418 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10419 }
10420 break;
10421 }
10422
10423 /* Handle other relocations that tweak non-addend part of insn. */
10424 insn = 0;
10425 max_br_offset = 1 << 25;
10426 addend = rel->r_addend;
10427 switch (r_type)
10428 {
10429 default:
10430 break;
10431
10432 /* Branch taken prediction relocations. */
10433 case R_PPC64_ADDR14_BRTAKEN:
10434 case R_PPC64_REL14_BRTAKEN:
10435 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10436 /* Fall thru. */
10437
10438 /* Branch not taken prediction relocations. */
10439 case R_PPC64_ADDR14_BRNTAKEN:
10440 case R_PPC64_REL14_BRNTAKEN:
10441 insn |= bfd_get_32 (output_bfd,
10442 contents + rel->r_offset) & ~(0x01 << 21);
10443 /* Fall thru. */
10444
10445 case R_PPC64_REL14:
10446 max_br_offset = 1 << 15;
10447 /* Fall thru. */
10448
10449 case R_PPC64_REL24:
10450 /* Calls to functions with a different TOC, such as calls to
10451 shared objects, need to alter the TOC pointer. This is
10452 done using a linkage stub. A REL24 branching to these
10453 linkage stubs needs to be followed by a nop, as the nop
10454 will be replaced with an instruction to restore the TOC
10455 base pointer. */
10456 stub_entry = NULL;
10457 fdh = h;
10458 if (((h != NULL
10459 && (((fdh = h->oh) != NULL
10460 && fdh->elf.plt.plist != NULL)
10461 || (fdh = h)->elf.plt.plist != NULL))
10462 || (sec != NULL
10463 && sec->output_section != NULL
10464 && sec->id <= htab->top_id
10465 && (htab->stub_group[sec->id].toc_off
10466 != htab->stub_group[input_section->id].toc_off)))
10467 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10468 rel, htab)) != NULL
10469 && (stub_entry->stub_type == ppc_stub_plt_call
10470 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10471 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10472 {
10473 bfd_boolean can_plt_call = FALSE;
10474
10475 if (rel->r_offset + 8 <= input_section->size)
10476 {
10477 unsigned long nop;
10478 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10479 if (nop == NOP
10480 || nop == CROR_151515 || nop == CROR_313131)
10481 {
10482 bfd_put_32 (input_bfd, LD_R2_40R1,
10483 contents + rel->r_offset + 4);
10484 can_plt_call = TRUE;
10485 }
10486 }
10487
10488 if (!can_plt_call)
10489 {
10490 if (stub_entry->stub_type == ppc_stub_plt_call)
10491 {
10492 /* If this is a plain branch rather than a branch
10493 and link, don't require a nop. However, don't
10494 allow tail calls in a shared library as they
10495 will result in r2 being corrupted. */
10496 unsigned long br;
10497 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10498 if (info->executable && (br & 1) == 0)
10499 can_plt_call = TRUE;
10500 else
10501 stub_entry = NULL;
10502 }
10503 else if (h != NULL
10504 && strcmp (h->elf.root.root.string,
10505 ".__libc_start_main") == 0)
10506 {
10507 /* Allow crt1 branch to go via a toc adjusting stub. */
10508 can_plt_call = TRUE;
10509 }
10510 else
10511 {
10512 if (strcmp (input_section->output_section->name,
10513 ".init") == 0
10514 || strcmp (input_section->output_section->name,
10515 ".fini") == 0)
10516 (*_bfd_error_handler)
10517 (_("%B(%A+0x%lx): automatic multiple TOCs "
10518 "not supported using your crt files; "
10519 "recompile with -mminimal-toc or upgrade gcc"),
10520 input_bfd,
10521 input_section,
10522 (long) rel->r_offset);
10523 else
10524 (*_bfd_error_handler)
10525 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10526 "does not allow automatic multiple TOCs; "
10527 "recompile with -mminimal-toc or "
10528 "-fno-optimize-sibling-calls, "
10529 "or make `%s' extern"),
10530 input_bfd,
10531 input_section,
10532 (long) rel->r_offset,
10533 sym_name,
10534 sym_name);
10535 bfd_set_error (bfd_error_bad_value);
10536 ret = FALSE;
10537 }
10538 }
10539
10540 if (can_plt_call
10541 && stub_entry->stub_type == ppc_stub_plt_call)
10542 unresolved_reloc = FALSE;
10543 }
10544
10545 if (stub_entry == NULL
10546 && get_opd_info (sec) != NULL)
10547 {
10548 /* The branch destination is the value of the opd entry. */
10549 bfd_vma off = (relocation + addend
10550 - sec->output_section->vma
10551 - sec->output_offset);
10552 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10553 if (dest != (bfd_vma) -1)
10554 {
10555 relocation = dest;
10556 addend = 0;
10557 }
10558 }
10559
10560 /* If the branch is out of reach we ought to have a long
10561 branch stub. */
10562 from = (rel->r_offset
10563 + input_section->output_offset
10564 + input_section->output_section->vma);
10565
10566 if (stub_entry == NULL
10567 && (relocation + addend - from + max_br_offset
10568 >= 2 * max_br_offset)
10569 && r_type != R_PPC64_ADDR14_BRTAKEN
10570 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10571 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10572 htab);
10573
10574 if (stub_entry != NULL)
10575 {
10576 /* Munge up the value and addend so that we call the stub
10577 rather than the procedure directly. */
10578 relocation = (stub_entry->stub_offset
10579 + stub_entry->stub_sec->output_offset
10580 + stub_entry->stub_sec->output_section->vma);
10581 addend = 0;
10582 }
10583
10584 if (insn != 0)
10585 {
10586 if (is_power4)
10587 {
10588 /* Set 'a' bit. This is 0b00010 in BO field for branch
10589 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10590 for branch on CTR insns (BO == 1a00t or 1a01t). */
10591 if ((insn & (0x14 << 21)) == (0x04 << 21))
10592 insn |= 0x02 << 21;
10593 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10594 insn |= 0x08 << 21;
10595 else
10596 break;
10597 }
10598 else
10599 {
10600 /* Invert 'y' bit if not the default. */
10601 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10602 insn ^= 0x01 << 21;
10603 }
10604
10605 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10606 }
10607
10608 /* NOP out calls to undefined weak functions.
10609 We can thus call a weak function without first
10610 checking whether the function is defined. */
10611 else if (h != NULL
10612 && h->elf.root.type == bfd_link_hash_undefweak
10613 && r_type == R_PPC64_REL24
10614 && relocation == 0
10615 && addend == 0)
10616 {
10617 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10618 continue;
10619 }
10620 break;
10621 }
10622
10623 /* Set `addend'. */
10624 tls_type = 0;
10625 switch (r_type)
10626 {
10627 default:
10628 (*_bfd_error_handler)
10629 (_("%B: unknown relocation type %d for symbol %s"),
10630 input_bfd, (int) r_type, sym_name);
10631
10632 bfd_set_error (bfd_error_bad_value);
10633 ret = FALSE;
10634 continue;
10635
10636 case R_PPC64_NONE:
10637 case R_PPC64_TLS:
10638 case R_PPC64_GNU_VTINHERIT:
10639 case R_PPC64_GNU_VTENTRY:
10640 continue;
10641
10642 /* GOT16 relocations. Like an ADDR16 using the symbol's
10643 address in the GOT as relocation value instead of the
10644 symbol's value itself. Also, create a GOT entry for the
10645 symbol and put the symbol value there. */
10646 case R_PPC64_GOT_TLSGD16:
10647 case R_PPC64_GOT_TLSGD16_LO:
10648 case R_PPC64_GOT_TLSGD16_HI:
10649 case R_PPC64_GOT_TLSGD16_HA:
10650 tls_type = TLS_TLS | TLS_GD;
10651 goto dogot;
10652
10653 case R_PPC64_GOT_TLSLD16:
10654 case R_PPC64_GOT_TLSLD16_LO:
10655 case R_PPC64_GOT_TLSLD16_HI:
10656 case R_PPC64_GOT_TLSLD16_HA:
10657 tls_type = TLS_TLS | TLS_LD;
10658 goto dogot;
10659
10660 case R_PPC64_GOT_TPREL16_DS:
10661 case R_PPC64_GOT_TPREL16_LO_DS:
10662 case R_PPC64_GOT_TPREL16_HI:
10663 case R_PPC64_GOT_TPREL16_HA:
10664 tls_type = TLS_TLS | TLS_TPREL;
10665 goto dogot;
10666
10667 case R_PPC64_GOT_DTPREL16_DS:
10668 case R_PPC64_GOT_DTPREL16_LO_DS:
10669 case R_PPC64_GOT_DTPREL16_HI:
10670 case R_PPC64_GOT_DTPREL16_HA:
10671 tls_type = TLS_TLS | TLS_DTPREL;
10672 goto dogot;
10673
10674 case R_PPC64_GOT16:
10675 case R_PPC64_GOT16_LO:
10676 case R_PPC64_GOT16_HI:
10677 case R_PPC64_GOT16_HA:
10678 case R_PPC64_GOT16_DS:
10679 case R_PPC64_GOT16_LO_DS:
10680 dogot:
10681 {
10682 /* Relocation is to the entry for this symbol in the global
10683 offset table. */
10684 asection *got;
10685 bfd_vma *offp;
10686 bfd_vma off;
10687 unsigned long indx = 0;
10688
10689 if (tls_type == (TLS_TLS | TLS_LD)
10690 && (h == NULL
10691 || !h->elf.def_dynamic))
10692 offp = &ppc64_tlsld_got (input_bfd)->offset;
10693 else
10694 {
10695 struct got_entry *ent;
10696
10697 if (h != NULL)
10698 {
10699 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10700 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10701 &h->elf)
10702 || (info->shared
10703 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10704 /* This is actually a static link, or it is a
10705 -Bsymbolic link and the symbol is defined
10706 locally, or the symbol was forced to be local
10707 because of a version file. */
10708 ;
10709 else
10710 {
10711 indx = h->elf.dynindx;
10712 unresolved_reloc = FALSE;
10713 }
10714 ent = h->elf.got.glist;
10715 }
10716 else
10717 {
10718 if (local_got_ents == NULL)
10719 abort ();
10720 ent = local_got_ents[r_symndx];
10721 }
10722
10723 for (; ent != NULL; ent = ent->next)
10724 if (ent->addend == orig_addend
10725 && ent->owner == input_bfd
10726 && ent->tls_type == tls_type)
10727 break;
10728 if (ent == NULL)
10729 abort ();
10730 offp = &ent->got.offset;
10731 }
10732
10733 got = ppc64_elf_tdata (input_bfd)->got;
10734 if (got == NULL)
10735 abort ();
10736
10737 /* The offset must always be a multiple of 8. We use the
10738 least significant bit to record whether we have already
10739 processed this entry. */
10740 off = *offp;
10741 if ((off & 1) != 0)
10742 off &= ~1;
10743 else
10744 {
10745 /* Generate relocs for the dynamic linker, except in
10746 the case of TLSLD where we'll use one entry per
10747 module. */
10748 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10749
10750 *offp = off | 1;
10751 if ((info->shared || indx != 0)
10752 && (h == NULL
10753 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10754 || h->elf.root.type != bfd_link_hash_undefweak))
10755 {
10756 outrel.r_offset = (got->output_section->vma
10757 + got->output_offset
10758 + off);
10759 outrel.r_addend = addend;
10760 if (tls_type & (TLS_LD | TLS_GD))
10761 {
10762 outrel.r_addend = 0;
10763 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10764 if (tls_type == (TLS_TLS | TLS_GD))
10765 {
10766 loc = relgot->contents;
10767 loc += (relgot->reloc_count++
10768 * sizeof (Elf64_External_Rela));
10769 bfd_elf64_swap_reloca_out (output_bfd,
10770 &outrel, loc);
10771 outrel.r_offset += 8;
10772 outrel.r_addend = addend;
10773 outrel.r_info
10774 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10775 }
10776 }
10777 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10778 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10779 else if (tls_type == (TLS_TLS | TLS_TPREL))
10780 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10781 else if (indx == 0)
10782 {
10783 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10784
10785 /* Write the .got section contents for the sake
10786 of prelink. */
10787 loc = got->contents + off;
10788 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10789 loc);
10790 }
10791 else
10792 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10793
10794 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10795 {
10796 outrel.r_addend += relocation;
10797 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10798 outrel.r_addend -= htab->elf.tls_sec->vma;
10799 }
10800 loc = relgot->contents;
10801 loc += (relgot->reloc_count++
10802 * sizeof (Elf64_External_Rela));
10803 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10804 }
10805
10806 /* Init the .got section contents here if we're not
10807 emitting a reloc. */
10808 else
10809 {
10810 relocation += addend;
10811 if (tls_type == (TLS_TLS | TLS_LD))
10812 relocation = 1;
10813 else if (tls_type != 0)
10814 {
10815 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10816 if (tls_type == (TLS_TLS | TLS_TPREL))
10817 relocation += DTP_OFFSET - TP_OFFSET;
10818
10819 if (tls_type == (TLS_TLS | TLS_GD))
10820 {
10821 bfd_put_64 (output_bfd, relocation,
10822 got->contents + off + 8);
10823 relocation = 1;
10824 }
10825 }
10826
10827 bfd_put_64 (output_bfd, relocation,
10828 got->contents + off);
10829 }
10830 }
10831
10832 if (off >= (bfd_vma) -2)
10833 abort ();
10834
10835 relocation = got->output_offset + off;
10836
10837 /* TOC base (r2) is TOC start plus 0x8000. */
10838 addend = -TOC_BASE_OFF;
10839 }
10840 break;
10841
10842 case R_PPC64_PLT16_HA:
10843 case R_PPC64_PLT16_HI:
10844 case R_PPC64_PLT16_LO:
10845 case R_PPC64_PLT32:
10846 case R_PPC64_PLT64:
10847 /* Relocation is to the entry for this symbol in the
10848 procedure linkage table. */
10849
10850 /* Resolve a PLT reloc against a local symbol directly,
10851 without using the procedure linkage table. */
10852 if (h == NULL)
10853 break;
10854
10855 /* It's possible that we didn't make a PLT entry for this
10856 symbol. This happens when statically linking PIC code,
10857 or when using -Bsymbolic. Go find a match if there is a
10858 PLT entry. */
10859 if (htab->plt != NULL)
10860 {
10861 struct plt_entry *ent;
10862 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10863 if (ent->addend == orig_addend
10864 && ent->plt.offset != (bfd_vma) -1)
10865 {
10866 relocation = (htab->plt->output_section->vma
10867 + htab->plt->output_offset
10868 + ent->plt.offset);
10869 unresolved_reloc = FALSE;
10870 }
10871 }
10872 break;
10873
10874 case R_PPC64_TOC:
10875 /* Relocation value is TOC base. */
10876 relocation = TOCstart;
10877 if (r_symndx == 0)
10878 relocation += htab->stub_group[input_section->id].toc_off;
10879 else if (unresolved_reloc)
10880 ;
10881 else if (sec != NULL && sec->id <= htab->top_id)
10882 relocation += htab->stub_group[sec->id].toc_off;
10883 else
10884 unresolved_reloc = TRUE;
10885 goto dodyn;
10886
10887 /* TOC16 relocs. We want the offset relative to the TOC base,
10888 which is the address of the start of the TOC plus 0x8000.
10889 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10890 in this order. */
10891 case R_PPC64_TOC16:
10892 case R_PPC64_TOC16_LO:
10893 case R_PPC64_TOC16_HI:
10894 case R_PPC64_TOC16_DS:
10895 case R_PPC64_TOC16_LO_DS:
10896 case R_PPC64_TOC16_HA:
10897 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10898 break;
10899
10900 /* Relocate against the beginning of the section. */
10901 case R_PPC64_SECTOFF:
10902 case R_PPC64_SECTOFF_LO:
10903 case R_PPC64_SECTOFF_HI:
10904 case R_PPC64_SECTOFF_DS:
10905 case R_PPC64_SECTOFF_LO_DS:
10906 case R_PPC64_SECTOFF_HA:
10907 if (sec != NULL)
10908 addend -= sec->output_section->vma;
10909 break;
10910
10911 case R_PPC64_REL14:
10912 case R_PPC64_REL14_BRNTAKEN:
10913 case R_PPC64_REL14_BRTAKEN:
10914 case R_PPC64_REL24:
10915 break;
10916
10917 case R_PPC64_TPREL16:
10918 case R_PPC64_TPREL16_LO:
10919 case R_PPC64_TPREL16_HI:
10920 case R_PPC64_TPREL16_HA:
10921 case R_PPC64_TPREL16_DS:
10922 case R_PPC64_TPREL16_LO_DS:
10923 case R_PPC64_TPREL16_HIGHER:
10924 case R_PPC64_TPREL16_HIGHERA:
10925 case R_PPC64_TPREL16_HIGHEST:
10926 case R_PPC64_TPREL16_HIGHESTA:
10927 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10928 if (info->shared)
10929 /* The TPREL16 relocs shouldn't really be used in shared
10930 libs as they will result in DT_TEXTREL being set, but
10931 support them anyway. */
10932 goto dodyn;
10933 break;
10934
10935 case R_PPC64_DTPREL16:
10936 case R_PPC64_DTPREL16_LO:
10937 case R_PPC64_DTPREL16_HI:
10938 case R_PPC64_DTPREL16_HA:
10939 case R_PPC64_DTPREL16_DS:
10940 case R_PPC64_DTPREL16_LO_DS:
10941 case R_PPC64_DTPREL16_HIGHER:
10942 case R_PPC64_DTPREL16_HIGHERA:
10943 case R_PPC64_DTPREL16_HIGHEST:
10944 case R_PPC64_DTPREL16_HIGHESTA:
10945 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10946 break;
10947
10948 case R_PPC64_DTPMOD64:
10949 relocation = 1;
10950 addend = 0;
10951 goto dodyn;
10952
10953 case R_PPC64_TPREL64:
10954 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10955 goto dodyn;
10956
10957 case R_PPC64_DTPREL64:
10958 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10959 /* Fall thru */
10960
10961 /* Relocations that may need to be propagated if this is a
10962 dynamic object. */
10963 case R_PPC64_REL30:
10964 case R_PPC64_REL32:
10965 case R_PPC64_REL64:
10966 case R_PPC64_ADDR14:
10967 case R_PPC64_ADDR14_BRNTAKEN:
10968 case R_PPC64_ADDR14_BRTAKEN:
10969 case R_PPC64_ADDR16:
10970 case R_PPC64_ADDR16_DS:
10971 case R_PPC64_ADDR16_HA:
10972 case R_PPC64_ADDR16_HI:
10973 case R_PPC64_ADDR16_HIGHER:
10974 case R_PPC64_ADDR16_HIGHERA:
10975 case R_PPC64_ADDR16_HIGHEST:
10976 case R_PPC64_ADDR16_HIGHESTA:
10977 case R_PPC64_ADDR16_LO:
10978 case R_PPC64_ADDR16_LO_DS:
10979 case R_PPC64_ADDR24:
10980 case R_PPC64_ADDR32:
10981 case R_PPC64_ADDR64:
10982 case R_PPC64_UADDR16:
10983 case R_PPC64_UADDR32:
10984 case R_PPC64_UADDR64:
10985 dodyn:
10986 if ((input_section->flags & SEC_ALLOC) == 0)
10987 break;
10988
10989 if (NO_OPD_RELOCS && is_opd)
10990 break;
10991
10992 if ((info->shared
10993 && (h == NULL
10994 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10995 || h->elf.root.type != bfd_link_hash_undefweak)
10996 && (MUST_BE_DYN_RELOC (r_type)
10997 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10998 || (ELIMINATE_COPY_RELOCS
10999 && !info->shared
11000 && h != NULL
11001 && h->elf.dynindx != -1
11002 && !h->elf.non_got_ref
11003 && h->elf.def_dynamic
11004 && !h->elf.def_regular))
11005 {
11006 Elf_Internal_Rela outrel;
11007 bfd_boolean skip, relocate;
11008 asection *sreloc;
11009 bfd_byte *loc;
11010 bfd_vma out_off;
11011
11012 /* When generating a dynamic object, these relocations
11013 are copied into the output file to be resolved at run
11014 time. */
11015
11016 skip = FALSE;
11017 relocate = FALSE;
11018
11019 out_off = _bfd_elf_section_offset (output_bfd, info,
11020 input_section, rel->r_offset);
11021 if (out_off == (bfd_vma) -1)
11022 skip = TRUE;
11023 else if (out_off == (bfd_vma) -2)
11024 skip = TRUE, relocate = TRUE;
11025 out_off += (input_section->output_section->vma
11026 + input_section->output_offset);
11027 outrel.r_offset = out_off;
11028 outrel.r_addend = rel->r_addend;
11029
11030 /* Optimize unaligned reloc use. */
11031 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11032 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11033 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11034 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11035 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11036 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11037 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11038 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11039 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11040
11041 if (skip)
11042 memset (&outrel, 0, sizeof outrel);
11043 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11044 && !is_opd
11045 && r_type != R_PPC64_TOC)
11046 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11047 else
11048 {
11049 /* This symbol is local, or marked to become local,
11050 or this is an opd section reloc which must point
11051 at a local function. */
11052 outrel.r_addend += relocation;
11053 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11054 {
11055 if (is_opd && h != NULL)
11056 {
11057 /* Lie about opd entries. This case occurs
11058 when building shared libraries and we
11059 reference a function in another shared
11060 lib. The same thing happens for a weak
11061 definition in an application that's
11062 overridden by a strong definition in a
11063 shared lib. (I believe this is a generic
11064 bug in binutils handling of weak syms.)
11065 In these cases we won't use the opd
11066 entry in this lib. */
11067 unresolved_reloc = FALSE;
11068 }
11069 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11070
11071 /* We need to relocate .opd contents for ld.so.
11072 Prelink also wants simple and consistent rules
11073 for relocs. This make all RELATIVE relocs have
11074 *r_offset equal to r_addend. */
11075 relocate = TRUE;
11076 }
11077 else
11078 {
11079 long indx = 0;
11080
11081 if (bfd_is_abs_section (sec))
11082 ;
11083 else if (sec == NULL || sec->owner == NULL)
11084 {
11085 bfd_set_error (bfd_error_bad_value);
11086 return FALSE;
11087 }
11088 else
11089 {
11090 asection *osec;
11091
11092 osec = sec->output_section;
11093 indx = elf_section_data (osec)->dynindx;
11094
11095 if (indx == 0)
11096 {
11097 if ((osec->flags & SEC_READONLY) == 0
11098 && htab->elf.data_index_section != NULL)
11099 osec = htab->elf.data_index_section;
11100 else
11101 osec = htab->elf.text_index_section;
11102 indx = elf_section_data (osec)->dynindx;
11103 }
11104 BFD_ASSERT (indx != 0);
11105
11106 /* We are turning this relocation into one
11107 against a section symbol, so subtract out
11108 the output section's address but not the
11109 offset of the input section in the output
11110 section. */
11111 outrel.r_addend -= osec->vma;
11112 }
11113
11114 outrel.r_info = ELF64_R_INFO (indx, r_type);
11115 }
11116 }
11117
11118 sreloc = elf_section_data (input_section)->sreloc;
11119 if (sreloc == NULL)
11120 abort ();
11121
11122 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11123 >= sreloc->size)
11124 abort ();
11125 loc = sreloc->contents;
11126 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11127 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11128
11129 /* If this reloc is against an external symbol, it will
11130 be computed at runtime, so there's no need to do
11131 anything now. However, for the sake of prelink ensure
11132 that the section contents are a known value. */
11133 if (! relocate)
11134 {
11135 unresolved_reloc = FALSE;
11136 /* The value chosen here is quite arbitrary as ld.so
11137 ignores section contents except for the special
11138 case of .opd where the contents might be accessed
11139 before relocation. Choose zero, as that won't
11140 cause reloc overflow. */
11141 relocation = 0;
11142 addend = 0;
11143 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11144 to improve backward compatibility with older
11145 versions of ld. */
11146 if (r_type == R_PPC64_ADDR64)
11147 addend = outrel.r_addend;
11148 /* Adjust pc_relative relocs to have zero in *r_offset. */
11149 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11150 addend = (input_section->output_section->vma
11151 + input_section->output_offset
11152 + rel->r_offset);
11153 }
11154 }
11155 break;
11156
11157 case R_PPC64_COPY:
11158 case R_PPC64_GLOB_DAT:
11159 case R_PPC64_JMP_SLOT:
11160 case R_PPC64_RELATIVE:
11161 /* We shouldn't ever see these dynamic relocs in relocatable
11162 files. */
11163 /* Fall through. */
11164
11165 case R_PPC64_PLTGOT16:
11166 case R_PPC64_PLTGOT16_DS:
11167 case R_PPC64_PLTGOT16_HA:
11168 case R_PPC64_PLTGOT16_HI:
11169 case R_PPC64_PLTGOT16_LO:
11170 case R_PPC64_PLTGOT16_LO_DS:
11171 case R_PPC64_PLTREL32:
11172 case R_PPC64_PLTREL64:
11173 /* These ones haven't been implemented yet. */
11174
11175 (*_bfd_error_handler)
11176 (_("%B: relocation %s is not supported for symbol %s."),
11177 input_bfd,
11178 ppc64_elf_howto_table[r_type]->name, sym_name);
11179
11180 bfd_set_error (bfd_error_invalid_operation);
11181 ret = FALSE;
11182 continue;
11183 }
11184
11185 /* Do any further special processing. */
11186 switch (r_type)
11187 {
11188 default:
11189 break;
11190
11191 case R_PPC64_ADDR16_HA:
11192 case R_PPC64_ADDR16_HIGHERA:
11193 case R_PPC64_ADDR16_HIGHESTA:
11194 case R_PPC64_TOC16_HA:
11195 case R_PPC64_SECTOFF_HA:
11196 case R_PPC64_TPREL16_HA:
11197 case R_PPC64_DTPREL16_HA:
11198 case R_PPC64_TPREL16_HIGHER:
11199 case R_PPC64_TPREL16_HIGHERA:
11200 case R_PPC64_TPREL16_HIGHEST:
11201 case R_PPC64_TPREL16_HIGHESTA:
11202 case R_PPC64_DTPREL16_HIGHER:
11203 case R_PPC64_DTPREL16_HIGHERA:
11204 case R_PPC64_DTPREL16_HIGHEST:
11205 case R_PPC64_DTPREL16_HIGHESTA:
11206 /* It's just possible that this symbol is a weak symbol
11207 that's not actually defined anywhere. In that case,
11208 'sec' would be NULL, and we should leave the symbol
11209 alone (it will be set to zero elsewhere in the link). */
11210 if (sec == NULL)
11211 break;
11212 /* Fall thru */
11213
11214 case R_PPC64_GOT16_HA:
11215 case R_PPC64_PLTGOT16_HA:
11216 case R_PPC64_PLT16_HA:
11217 case R_PPC64_GOT_TLSGD16_HA:
11218 case R_PPC64_GOT_TLSLD16_HA:
11219 case R_PPC64_GOT_TPREL16_HA:
11220 case R_PPC64_GOT_DTPREL16_HA:
11221 /* Add 0x10000 if sign bit in 0:15 is set.
11222 Bits 0:15 are not used. */
11223 addend += 0x8000;
11224 break;
11225
11226 case R_PPC64_ADDR16_DS:
11227 case R_PPC64_ADDR16_LO_DS:
11228 case R_PPC64_GOT16_DS:
11229 case R_PPC64_GOT16_LO_DS:
11230 case R_PPC64_PLT16_LO_DS:
11231 case R_PPC64_SECTOFF_DS:
11232 case R_PPC64_SECTOFF_LO_DS:
11233 case R_PPC64_TOC16_DS:
11234 case R_PPC64_TOC16_LO_DS:
11235 case R_PPC64_PLTGOT16_DS:
11236 case R_PPC64_PLTGOT16_LO_DS:
11237 case R_PPC64_GOT_TPREL16_DS:
11238 case R_PPC64_GOT_TPREL16_LO_DS:
11239 case R_PPC64_GOT_DTPREL16_DS:
11240 case R_PPC64_GOT_DTPREL16_LO_DS:
11241 case R_PPC64_TPREL16_DS:
11242 case R_PPC64_TPREL16_LO_DS:
11243 case R_PPC64_DTPREL16_DS:
11244 case R_PPC64_DTPREL16_LO_DS:
11245 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11246 mask = 3;
11247 /* If this reloc is against an lq insn, then the value must be
11248 a multiple of 16. This is somewhat of a hack, but the
11249 "correct" way to do this by defining _DQ forms of all the
11250 _DS relocs bloats all reloc switches in this file. It
11251 doesn't seem to make much sense to use any of these relocs
11252 in data, so testing the insn should be safe. */
11253 if ((insn & (0x3f << 26)) == (56u << 26))
11254 mask = 15;
11255 if (((relocation + addend) & mask) != 0)
11256 {
11257 (*_bfd_error_handler)
11258 (_("%B: error: relocation %s not a multiple of %d"),
11259 input_bfd,
11260 ppc64_elf_howto_table[r_type]->name,
11261 mask + 1);
11262 bfd_set_error (bfd_error_bad_value);
11263 ret = FALSE;
11264 continue;
11265 }
11266 break;
11267 }
11268
11269 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11270 because such sections are not SEC_ALLOC and thus ld.so will
11271 not process them. */
11272 if (unresolved_reloc
11273 && !((input_section->flags & SEC_DEBUGGING) != 0
11274 && h->elf.def_dynamic))
11275 {
11276 (*_bfd_error_handler)
11277 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11278 input_bfd,
11279 input_section,
11280 (long) rel->r_offset,
11281 ppc64_elf_howto_table[(int) r_type]->name,
11282 h->elf.root.root.string);
11283 ret = FALSE;
11284 }
11285
11286 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11287 input_bfd,
11288 input_section,
11289 contents,
11290 rel->r_offset,
11291 relocation,
11292 addend);
11293
11294 if (r != bfd_reloc_ok)
11295 {
11296 if (sym_name == NULL)
11297 sym_name = "(null)";
11298 if (r == bfd_reloc_overflow)
11299 {
11300 if (warned)
11301 continue;
11302 if (h != NULL
11303 && h->elf.root.type == bfd_link_hash_undefweak
11304 && ppc64_elf_howto_table[r_type]->pc_relative)
11305 {
11306 /* Assume this is a call protected by other code that
11307 detects the symbol is undefined. If this is the case,
11308 we can safely ignore the overflow. If not, the
11309 program is hosed anyway, and a little warning isn't
11310 going to help. */
11311
11312 continue;
11313 }
11314
11315 if (!((*info->callbacks->reloc_overflow)
11316 (info, (h ? &h->elf.root : NULL), sym_name,
11317 ppc64_elf_howto_table[r_type]->name,
11318 orig_addend, input_bfd, input_section, rel->r_offset)))
11319 return FALSE;
11320 }
11321 else
11322 {
11323 (*_bfd_error_handler)
11324 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11325 input_bfd,
11326 input_section,
11327 (long) rel->r_offset,
11328 ppc64_elf_howto_table[r_type]->name,
11329 sym_name,
11330 (int) r);
11331 ret = FALSE;
11332 }
11333 }
11334 }
11335
11336 /* If we're emitting relocations, then shortly after this function
11337 returns, reloc offsets and addends for this section will be
11338 adjusted. Worse, reloc symbol indices will be for the output
11339 file rather than the input. Save a copy of the relocs for
11340 opd_entry_value. */
11341 if (is_opd && (info->emitrelocations || info->relocatable))
11342 {
11343 bfd_size_type amt;
11344 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11345 rel = bfd_alloc (input_bfd, amt);
11346 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11347 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11348 if (rel == NULL)
11349 return FALSE;
11350 memcpy (rel, relocs, amt);
11351 }
11352 return ret;
11353 }
11354
11355 /* Adjust the value of any local symbols in opd sections. */
11356
11357 static bfd_boolean
11358 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11359 const char *name ATTRIBUTE_UNUSED,
11360 Elf_Internal_Sym *elfsym,
11361 asection *input_sec,
11362 struct elf_link_hash_entry *h)
11363 {
11364 long *opd_adjust, adjust;
11365 bfd_vma value;
11366
11367 if (h != NULL)
11368 return TRUE;
11369
11370 opd_adjust = get_opd_info (input_sec);
11371 if (opd_adjust == NULL)
11372 return TRUE;
11373
11374 value = elfsym->st_value - input_sec->output_offset;
11375 if (!info->relocatable)
11376 value -= input_sec->output_section->vma;
11377
11378 adjust = opd_adjust[value / 8];
11379 if (adjust == -1)
11380 elfsym->st_value = 0;
11381 else
11382 elfsym->st_value += adjust;
11383 return TRUE;
11384 }
11385
11386 /* Finish up dynamic symbol handling. We set the contents of various
11387 dynamic sections here. */
11388
11389 static bfd_boolean
11390 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11391 struct bfd_link_info *info,
11392 struct elf_link_hash_entry *h,
11393 Elf_Internal_Sym *sym)
11394 {
11395 struct ppc_link_hash_table *htab;
11396 struct plt_entry *ent;
11397 Elf_Internal_Rela rela;
11398 bfd_byte *loc;
11399
11400 htab = ppc_hash_table (info);
11401
11402 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11403 if (ent->plt.offset != (bfd_vma) -1)
11404 {
11405 /* This symbol has an entry in the procedure linkage
11406 table. Set it up. */
11407
11408 if (htab->plt == NULL
11409 || htab->relplt == NULL
11410 || htab->glink == NULL)
11411 abort ();
11412
11413 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11414 fill in the PLT entry. */
11415 rela.r_offset = (htab->plt->output_section->vma
11416 + htab->plt->output_offset
11417 + ent->plt.offset);
11418 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11419 rela.r_addend = ent->addend;
11420
11421 loc = htab->relplt->contents;
11422 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11423 * sizeof (Elf64_External_Rela));
11424 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11425 }
11426
11427 if (h->needs_copy)
11428 {
11429 Elf_Internal_Rela rela;
11430 bfd_byte *loc;
11431
11432 /* This symbol needs a copy reloc. Set it up. */
11433
11434 if (h->dynindx == -1
11435 || (h->root.type != bfd_link_hash_defined
11436 && h->root.type != bfd_link_hash_defweak)
11437 || htab->relbss == NULL)
11438 abort ();
11439
11440 rela.r_offset = (h->root.u.def.value
11441 + h->root.u.def.section->output_section->vma
11442 + h->root.u.def.section->output_offset);
11443 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11444 rela.r_addend = 0;
11445 loc = htab->relbss->contents;
11446 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11447 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11448 }
11449
11450 /* Mark some specially defined symbols as absolute. */
11451 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11452 sym->st_shndx = SHN_ABS;
11453
11454 return TRUE;
11455 }
11456
11457 /* Used to decide how to sort relocs in an optimal manner for the
11458 dynamic linker, before writing them out. */
11459
11460 static enum elf_reloc_type_class
11461 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11462 {
11463 enum elf_ppc64_reloc_type r_type;
11464
11465 r_type = ELF64_R_TYPE (rela->r_info);
11466 switch (r_type)
11467 {
11468 case R_PPC64_RELATIVE:
11469 return reloc_class_relative;
11470 case R_PPC64_JMP_SLOT:
11471 return reloc_class_plt;
11472 case R_PPC64_COPY:
11473 return reloc_class_copy;
11474 default:
11475 return reloc_class_normal;
11476 }
11477 }
11478
11479 /* Finish up the dynamic sections. */
11480
11481 static bfd_boolean
11482 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11483 struct bfd_link_info *info)
11484 {
11485 struct ppc_link_hash_table *htab;
11486 bfd *dynobj;
11487 asection *sdyn;
11488
11489 htab = ppc_hash_table (info);
11490 dynobj = htab->elf.dynobj;
11491 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11492
11493 if (htab->elf.dynamic_sections_created)
11494 {
11495 Elf64_External_Dyn *dyncon, *dynconend;
11496
11497 if (sdyn == NULL || htab->got == NULL)
11498 abort ();
11499
11500 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11501 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11502 for (; dyncon < dynconend; dyncon++)
11503 {
11504 Elf_Internal_Dyn dyn;
11505 asection *s;
11506
11507 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11508
11509 switch (dyn.d_tag)
11510 {
11511 default:
11512 continue;
11513
11514 case DT_PPC64_GLINK:
11515 s = htab->glink;
11516 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11517 /* We stupidly defined DT_PPC64_GLINK to be the start
11518 of glink rather than the first entry point, which is
11519 what ld.so needs, and now have a bigger stub to
11520 support automatic multiple TOCs. */
11521 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11522 break;
11523
11524 case DT_PPC64_OPD:
11525 s = bfd_get_section_by_name (output_bfd, ".opd");
11526 if (s == NULL)
11527 continue;
11528 dyn.d_un.d_ptr = s->vma;
11529 break;
11530
11531 case DT_PPC64_OPDSZ:
11532 s = bfd_get_section_by_name (output_bfd, ".opd");
11533 if (s == NULL)
11534 continue;
11535 dyn.d_un.d_val = s->size;
11536 break;
11537
11538 case DT_PLTGOT:
11539 s = htab->plt;
11540 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11541 break;
11542
11543 case DT_JMPREL:
11544 s = htab->relplt;
11545 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11546 break;
11547
11548 case DT_PLTRELSZ:
11549 dyn.d_un.d_val = htab->relplt->size;
11550 break;
11551
11552 case DT_RELASZ:
11553 /* Don't count procedure linkage table relocs in the
11554 overall reloc count. */
11555 s = htab->relplt;
11556 if (s == NULL)
11557 continue;
11558 dyn.d_un.d_val -= s->size;
11559 break;
11560
11561 case DT_RELA:
11562 /* We may not be using the standard ELF linker script.
11563 If .rela.plt is the first .rela section, we adjust
11564 DT_RELA to not include it. */
11565 s = htab->relplt;
11566 if (s == NULL)
11567 continue;
11568 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11569 continue;
11570 dyn.d_un.d_ptr += s->size;
11571 break;
11572 }
11573
11574 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11575 }
11576 }
11577
11578 if (htab->got != NULL && htab->got->size != 0)
11579 {
11580 /* Fill in the first entry in the global offset table.
11581 We use it to hold the link-time TOCbase. */
11582 bfd_put_64 (output_bfd,
11583 elf_gp (output_bfd) + TOC_BASE_OFF,
11584 htab->got->contents);
11585
11586 /* Set .got entry size. */
11587 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11588 }
11589
11590 if (htab->plt != NULL && htab->plt->size != 0)
11591 {
11592 /* Set .plt entry size. */
11593 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11594 = PLT_ENTRY_SIZE;
11595 }
11596
11597 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11598 brlt ourselves if emitrelocations. */
11599 if (htab->brlt != NULL
11600 && htab->brlt->reloc_count != 0
11601 && !_bfd_elf_link_output_relocs (output_bfd,
11602 htab->brlt,
11603 &elf_section_data (htab->brlt)->rel_hdr,
11604 elf_section_data (htab->brlt)->relocs,
11605 NULL))
11606 return FALSE;
11607
11608 /* We need to handle writing out multiple GOT sections ourselves,
11609 since we didn't add them to DYNOBJ. We know dynobj is the first
11610 bfd. */
11611 while ((dynobj = dynobj->link_next) != NULL)
11612 {
11613 asection *s;
11614
11615 if (!is_ppc64_elf_target (dynobj->xvec))
11616 continue;
11617
11618 s = ppc64_elf_tdata (dynobj)->got;
11619 if (s != NULL
11620 && s->size != 0
11621 && s->output_section != bfd_abs_section_ptr
11622 && !bfd_set_section_contents (output_bfd, s->output_section,
11623 s->contents, s->output_offset,
11624 s->size))
11625 return FALSE;
11626 s = ppc64_elf_tdata (dynobj)->relgot;
11627 if (s != NULL
11628 && s->size != 0
11629 && s->output_section != bfd_abs_section_ptr
11630 && !bfd_set_section_contents (output_bfd, s->output_section,
11631 s->contents, s->output_offset,
11632 s->size))
11633 return FALSE;
11634 }
11635
11636 return TRUE;
11637 }
11638
11639 #include "elf64-target.h"
GDB Binutils - Deliverables
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