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2007-05-15 H.J. Lu <hongjiu.lu@intel.com>
[binutils.git] / bfd / elf64-ppc.c
blob0e4f725d1ffd6ea880bce7a267159ec78a0a6fd0
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36
37 static bfd_reloc_status_type ppc64_elf_ha_reloc
38 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
39 static bfd_reloc_status_type ppc64_elf_branch_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_toc_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc64_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_vma opd_entry_value
56 (asection *, bfd_vma, asection **, bfd_vma *);
57
58 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
59 #define TARGET_LITTLE_NAME "elf64-powerpcle"
60 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
61 #define TARGET_BIG_NAME "elf64-powerpc"
62 #define ELF_ARCH bfd_arch_powerpc
63 #define ELF_MACHINE_CODE EM_PPC64
64 #define ELF_MAXPAGESIZE 0x10000
65 #define ELF_COMMONPAGESIZE 0x1000
66 #define elf_info_to_howto ppc64_elf_info_to_howto
67
68 #define elf_backend_want_got_sym 0
69 #define elf_backend_want_plt_sym 0
70 #define elf_backend_plt_alignment 3
71 #define elf_backend_plt_not_loaded 1
72 #define elf_backend_got_header_size 8
73 #define elf_backend_can_gc_sections 1
74 #define elf_backend_can_refcount 1
75 #define elf_backend_rela_normal 1
76 #define elf_backend_default_execstack 0
77
78 #define bfd_elf64_mkobject ppc64_elf_mkobject
79 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
80 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
81 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
82 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
83 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
84 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
85 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
86
87 #define elf_backend_object_p ppc64_elf_object_p
88 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
89 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
90 #define elf_backend_write_core_note ppc64_elf_write_core_note
91 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
92 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
93 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
94 #define elf_backend_check_directives ppc64_elf_check_directives
95 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
96 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
97 #define elf_backend_check_relocs ppc64_elf_check_relocs
98 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
99 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
100 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
101 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
102 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
103 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
104 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
105 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
106 #define elf_backend_action_discarded ppc64_elf_action_discarded
107 #define elf_backend_relocate_section ppc64_elf_relocate_section
108 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
109 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
110 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
111 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
112 #define elf_backend_special_sections ppc64_elf_special_sections
113
114 /* The name of the dynamic interpreter. This is put in the .interp
115 section. */
116 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
117
118 /* The size in bytes of an entry in the procedure linkage table. */
119 #define PLT_ENTRY_SIZE 24
120
121 /* The initial size of the plt reserved for the dynamic linker. */
122 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
123
124 /* TOC base pointers offset from start of TOC. */
125 #define TOC_BASE_OFF 0x8000
126
127 /* Offset of tp and dtp pointers from start of TLS block. */
128 #define TP_OFFSET 0x7000
129 #define DTP_OFFSET 0x8000
130
131 /* .plt call stub instructions. The normal stub is like this, but
132 sometimes the .plt entry crosses a 64k boundary and we need to
133 insert an addis to adjust r12. */
134 #define PLT_CALL_STUB_SIZE (7*4)
135 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
136 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
137 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
138 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
139 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
140 /* ld %r11,xxx+16@l(%r12) */
141 #define BCTR 0x4e800420 /* bctr */
142
143
144 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
145 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
146 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
147
148 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
149
150 /* glink call stub instructions. We enter with the index in R0. */
151 #define GLINK_CALL_STUB_SIZE (16*4)
152 /* 0: */
153 /* .quad plt0-1f */
154 /* __glink: */
155 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
156 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
157 /* 1: */
158 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
159 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
160 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
161 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
162 /* ld %11,0(%12) */
163 /* ld %2,8(%12) */
164 /* mtctr %11 */
165 /* ld %11,16(%12) */
166 /* bctr */
167
168 /* Pad with this. */
169 #define NOP 0x60000000
170
171 /* Some other nops. */
172 #define CROR_151515 0x4def7b82
173 #define CROR_313131 0x4ffffb82
174
175 /* .glink entries for the first 32k functions are two instructions. */
176 #define LI_R0_0 0x38000000 /* li %r0,0 */
177 #define B_DOT 0x48000000 /* b . */
178
179 /* After that, we need two instructions to load the index, followed by
180 a branch. */
181 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
182 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
183
184 /* Instructions used by the save and restore reg functions. */
185 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
186 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
187 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
188 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
189 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
190 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
191 #define LI_R12_0 0x39800000 /* li %r12,0 */
192 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
193 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
194 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
195 #define BLR 0x4e800020 /* blr */
196
197 /* Since .opd is an array of descriptors and each entry will end up
198 with identical R_PPC64_RELATIVE relocs, there is really no need to
199 propagate .opd relocs; The dynamic linker should be taught to
200 relocate .opd without reloc entries. */
201 #ifndef NO_OPD_RELOCS
202 #define NO_OPD_RELOCS 0
203 #endif
204 \f
205 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
206
207 /* Relocation HOWTO's. */
208 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
209
210 static reloc_howto_type ppc64_elf_howto_raw[] = {
211 /* This reloc does nothing. */
212 HOWTO (R_PPC64_NONE, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 32, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 bfd_elf_generic_reloc, /* special_function */
220 "R_PPC64_NONE", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 /* A standard 32 bit relocation. */
227 HOWTO (R_PPC64_ADDR32, /* type */
228 0, /* rightshift */
229 2, /* size (0 = byte, 1 = short, 2 = long) */
230 32, /* bitsize */
231 FALSE, /* pc_relative */
232 0, /* bitpos */
233 complain_overflow_bitfield, /* complain_on_overflow */
234 bfd_elf_generic_reloc, /* special_function */
235 "R_PPC64_ADDR32", /* name */
236 FALSE, /* partial_inplace */
237 0, /* src_mask */
238 0xffffffff, /* dst_mask */
239 FALSE), /* pcrel_offset */
240
241 /* An absolute 26 bit branch; the lower two bits must be zero.
242 FIXME: we don't check that, we just clear them. */
243 HOWTO (R_PPC64_ADDR24, /* type */
244 0, /* rightshift */
245 2, /* size (0 = byte, 1 = short, 2 = long) */
246 26, /* bitsize */
247 FALSE, /* pc_relative */
248 0, /* bitpos */
249 complain_overflow_bitfield, /* complain_on_overflow */
250 bfd_elf_generic_reloc, /* special_function */
251 "R_PPC64_ADDR24", /* name */
252 FALSE, /* partial_inplace */
253 0, /* src_mask */
254 0x03fffffc, /* dst_mask */
255 FALSE), /* pcrel_offset */
256
257 /* A standard 16 bit relocation. */
258 HOWTO (R_PPC64_ADDR16, /* type */
259 0, /* rightshift */
260 1, /* size (0 = byte, 1 = short, 2 = long) */
261 16, /* bitsize */
262 FALSE, /* pc_relative */
263 0, /* bitpos */
264 complain_overflow_bitfield, /* complain_on_overflow */
265 bfd_elf_generic_reloc, /* special_function */
266 "R_PPC64_ADDR16", /* name */
267 FALSE, /* partial_inplace */
268 0, /* src_mask */
269 0xffff, /* dst_mask */
270 FALSE), /* pcrel_offset */
271
272 /* A 16 bit relocation without overflow. */
273 HOWTO (R_PPC64_ADDR16_LO, /* type */
274 0, /* rightshift */
275 1, /* size (0 = byte, 1 = short, 2 = long) */
276 16, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_dont,/* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_PPC64_ADDR16_LO", /* name */
282 FALSE, /* partial_inplace */
283 0, /* src_mask */
284 0xffff, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* Bits 16-31 of an address. */
288 HOWTO (R_PPC64_ADDR16_HI, /* type */
289 16, /* rightshift */
290 1, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_dont, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC64_ADDR16_HI", /* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xffff, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
303 bits, treated as a signed number, is negative. */
304 HOWTO (R_PPC64_ADDR16_HA, /* type */
305 16, /* rightshift */
306 1, /* size (0 = byte, 1 = short, 2 = long) */
307 16, /* bitsize */
308 FALSE, /* pc_relative */
309 0, /* bitpos */
310 complain_overflow_dont, /* complain_on_overflow */
311 ppc64_elf_ha_reloc, /* special_function */
312 "R_PPC64_ADDR16_HA", /* name */
313 FALSE, /* partial_inplace */
314 0, /* src_mask */
315 0xffff, /* dst_mask */
316 FALSE), /* pcrel_offset */
317
318 /* An absolute 16 bit branch; the lower two bits must be zero.
319 FIXME: we don't check that, we just clear them. */
320 HOWTO (R_PPC64_ADDR14, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 ppc64_elf_branch_reloc, /* special_function */
328 "R_PPC64_ADDR14", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x0000fffc, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* An absolute 16 bit branch, for which bit 10 should be set to
335 indicate that the branch is expected to be taken. The lower two
336 bits must be zero. */
337 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_bitfield, /* complain_on_overflow */
344 ppc64_elf_brtaken_reloc, /* special_function */
345 "R_PPC64_ADDR14_BRTAKEN",/* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0x0000fffc, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 /* An absolute 16 bit branch, for which bit 10 should be set to
352 indicate that the branch is not expected to be taken. The lower
353 two bits must be zero. */
354 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 FALSE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_bitfield, /* complain_on_overflow */
361 ppc64_elf_brtaken_reloc, /* special_function */
362 "R_PPC64_ADDR14_BRNTAKEN",/* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0x0000fffc, /* dst_mask */
366 FALSE), /* pcrel_offset */
367
368 /* A relative 26 bit branch; the lower two bits must be zero. */
369 HOWTO (R_PPC64_REL24, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 26, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 ppc64_elf_branch_reloc, /* special_function */
377 "R_PPC64_REL24", /* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0x03fffffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* A relative 16 bit branch; the lower two bits must be zero. */
384 HOWTO (R_PPC64_REL14, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 16, /* bitsize */
388 TRUE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_signed, /* complain_on_overflow */
391 ppc64_elf_branch_reloc, /* special_function */
392 "R_PPC64_REL14", /* name */
393 FALSE, /* partial_inplace */
394 0, /* src_mask */
395 0x0000fffc, /* dst_mask */
396 TRUE), /* pcrel_offset */
397
398 /* A relative 16 bit branch. Bit 10 should be set to indicate that
399 the branch is expected to be taken. The lower two bits must be
400 zero. */
401 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 TRUE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_signed, /* complain_on_overflow */
408 ppc64_elf_brtaken_reloc, /* special_function */
409 "R_PPC64_REL14_BRTAKEN", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0x0000fffc, /* dst_mask */
413 TRUE), /* pcrel_offset */
414
415 /* A relative 16 bit branch. Bit 10 should be set to indicate that
416 the branch is not expected to be taken. The lower two bits must
417 be zero. */
418 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
419 0, /* rightshift */
420 2, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 TRUE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_signed, /* complain_on_overflow */
425 ppc64_elf_brtaken_reloc, /* special_function */
426 "R_PPC64_REL14_BRNTAKEN",/* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0x0000fffc, /* dst_mask */
430 TRUE), /* pcrel_offset */
431
432 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
433 symbol. */
434 HOWTO (R_PPC64_GOT16, /* type */
435 0, /* rightshift */
436 1, /* size (0 = byte, 1 = short, 2 = long) */
437 16, /* bitsize */
438 FALSE, /* pc_relative */
439 0, /* bitpos */
440 complain_overflow_signed, /* complain_on_overflow */
441 ppc64_elf_unhandled_reloc, /* special_function */
442 "R_PPC64_GOT16", /* name */
443 FALSE, /* partial_inplace */
444 0, /* src_mask */
445 0xffff, /* dst_mask */
446 FALSE), /* pcrel_offset */
447
448 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
449 the symbol. */
450 HOWTO (R_PPC64_GOT16_LO, /* type */
451 0, /* rightshift */
452 1, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 FALSE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_dont, /* complain_on_overflow */
457 ppc64_elf_unhandled_reloc, /* special_function */
458 "R_PPC64_GOT16_LO", /* name */
459 FALSE, /* partial_inplace */
460 0, /* src_mask */
461 0xffff, /* dst_mask */
462 FALSE), /* pcrel_offset */
463
464 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
465 the symbol. */
466 HOWTO (R_PPC64_GOT16_HI, /* type */
467 16, /* rightshift */
468 1, /* size (0 = byte, 1 = short, 2 = long) */
469 16, /* bitsize */
470 FALSE, /* pc_relative */
471 0, /* bitpos */
472 complain_overflow_dont,/* complain_on_overflow */
473 ppc64_elf_unhandled_reloc, /* special_function */
474 "R_PPC64_GOT16_HI", /* name */
475 FALSE, /* partial_inplace */
476 0, /* src_mask */
477 0xffff, /* dst_mask */
478 FALSE), /* pcrel_offset */
479
480 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
481 the symbol. */
482 HOWTO (R_PPC64_GOT16_HA, /* type */
483 16, /* rightshift */
484 1, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 0, /* bitpos */
488 complain_overflow_dont,/* complain_on_overflow */
489 ppc64_elf_unhandled_reloc, /* special_function */
490 "R_PPC64_GOT16_HA", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0xffff, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 /* This is used only by the dynamic linker. The symbol should exist
497 both in the object being run and in some shared library. The
498 dynamic linker copies the data addressed by the symbol from the
499 shared library into the object, because the object being
500 run has to have the data at some particular address. */
501 HOWTO (R_PPC64_COPY, /* type */
502 0, /* rightshift */
503 0, /* this one is variable size */
504 0, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_dont, /* complain_on_overflow */
508 ppc64_elf_unhandled_reloc, /* special_function */
509 "R_PPC64_COPY", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Like R_PPC64_ADDR64, but used when setting global offset table
516 entries. */
517 HOWTO (R_PPC64_GLOB_DAT, /* type */
518 0, /* rightshift */
519 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
520 64, /* bitsize */
521 FALSE, /* pc_relative */
522 0, /* bitpos */
523 complain_overflow_dont, /* complain_on_overflow */
524 ppc64_elf_unhandled_reloc, /* special_function */
525 "R_PPC64_GLOB_DAT", /* name */
526 FALSE, /* partial_inplace */
527 0, /* src_mask */
528 ONES (64), /* dst_mask */
529 FALSE), /* pcrel_offset */
530
531 /* Created by the link editor. Marks a procedure linkage table
532 entry for a symbol. */
533 HOWTO (R_PPC64_JMP_SLOT, /* type */
534 0, /* rightshift */
535 0, /* size (0 = byte, 1 = short, 2 = long) */
536 0, /* bitsize */
537 FALSE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_dont, /* complain_on_overflow */
540 ppc64_elf_unhandled_reloc, /* special_function */
541 "R_PPC64_JMP_SLOT", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0, /* dst_mask */
545 FALSE), /* pcrel_offset */
546
547 /* Used only by the dynamic linker. When the object is run, this
548 doubleword64 is set to the load address of the object, plus the
549 addend. */
550 HOWTO (R_PPC64_RELATIVE, /* type */
551 0, /* rightshift */
552 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
553 64, /* bitsize */
554 FALSE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_dont, /* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_PPC64_RELATIVE", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 ONES (64), /* dst_mask */
562 FALSE), /* pcrel_offset */
563
564 /* Like R_PPC64_ADDR32, but may be unaligned. */
565 HOWTO (R_PPC64_UADDR32, /* type */
566 0, /* rightshift */
567 2, /* size (0 = byte, 1 = short, 2 = long) */
568 32, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_bitfield, /* complain_on_overflow */
572 bfd_elf_generic_reloc, /* special_function */
573 "R_PPC64_UADDR32", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0xffffffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* Like R_PPC64_ADDR16, but may be unaligned. */
580 HOWTO (R_PPC64_UADDR16, /* type */
581 0, /* rightshift */
582 1, /* size (0 = byte, 1 = short, 2 = long) */
583 16, /* bitsize */
584 FALSE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_bitfield, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 "R_PPC64_UADDR16", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0xffff, /* dst_mask */
592 FALSE), /* pcrel_offset */
593
594 /* 32-bit PC relative. */
595 HOWTO (R_PPC64_REL32, /* type */
596 0, /* rightshift */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
598 32, /* bitsize */
599 TRUE, /* pc_relative */
600 0, /* bitpos */
601 /* FIXME: Verify. Was complain_overflow_bitfield. */
602 complain_overflow_signed, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_PPC64_REL32", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 TRUE), /* pcrel_offset */
609
610 /* 32-bit relocation to the symbol's procedure linkage table. */
611 HOWTO (R_PPC64_PLT32, /* type */
612 0, /* rightshift */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
614 32, /* bitsize */
615 FALSE, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_bitfield, /* complain_on_overflow */
618 ppc64_elf_unhandled_reloc, /* special_function */
619 "R_PPC64_PLT32", /* name */
620 FALSE, /* partial_inplace */
621 0, /* src_mask */
622 0xffffffff, /* dst_mask */
623 FALSE), /* pcrel_offset */
624
625 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
626 FIXME: R_PPC64_PLTREL32 not supported. */
627 HOWTO (R_PPC64_PLTREL32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 TRUE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_signed, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_PLTREL32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 TRUE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
642 the symbol. */
643 HOWTO (R_PPC64_PLT16_LO, /* type */
644 0, /* rightshift */
645 1, /* size (0 = byte, 1 = short, 2 = long) */
646 16, /* bitsize */
647 FALSE, /* pc_relative */
648 0, /* bitpos */
649 complain_overflow_dont, /* complain_on_overflow */
650 ppc64_elf_unhandled_reloc, /* special_function */
651 "R_PPC64_PLT16_LO", /* name */
652 FALSE, /* partial_inplace */
653 0, /* src_mask */
654 0xffff, /* dst_mask */
655 FALSE), /* pcrel_offset */
656
657 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
658 the symbol. */
659 HOWTO (R_PPC64_PLT16_HI, /* type */
660 16, /* rightshift */
661 1, /* size (0 = byte, 1 = short, 2 = long) */
662 16, /* bitsize */
663 FALSE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_dont, /* complain_on_overflow */
666 ppc64_elf_unhandled_reloc, /* special_function */
667 "R_PPC64_PLT16_HI", /* name */
668 FALSE, /* partial_inplace */
669 0, /* src_mask */
670 0xffff, /* dst_mask */
671 FALSE), /* pcrel_offset */
672
673 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
674 the symbol. */
675 HOWTO (R_PPC64_PLT16_HA, /* type */
676 16, /* rightshift */
677 1, /* size (0 = byte, 1 = short, 2 = long) */
678 16, /* bitsize */
679 FALSE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_dont, /* complain_on_overflow */
682 ppc64_elf_unhandled_reloc, /* special_function */
683 "R_PPC64_PLT16_HA", /* name */
684 FALSE, /* partial_inplace */
685 0, /* src_mask */
686 0xffff, /* dst_mask */
687 FALSE), /* pcrel_offset */
688
689 /* 16-bit section relative relocation. */
690 HOWTO (R_PPC64_SECTOFF, /* type */
691 0, /* rightshift */
692 1, /* size (0 = byte, 1 = short, 2 = long) */
693 16, /* bitsize */
694 FALSE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_bitfield, /* complain_on_overflow */
697 ppc64_elf_sectoff_reloc, /* special_function */
698 "R_PPC64_SECTOFF", /* name */
699 FALSE, /* partial_inplace */
700 0, /* src_mask */
701 0xffff, /* dst_mask */
702 FALSE), /* pcrel_offset */
703
704 /* Like R_PPC64_SECTOFF, but no overflow warning. */
705 HOWTO (R_PPC64_SECTOFF_LO, /* type */
706 0, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_dont, /* complain_on_overflow */
712 ppc64_elf_sectoff_reloc, /* special_function */
713 "R_PPC64_SECTOFF_LO", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* 16-bit upper half section relative relocation. */
720 HOWTO (R_PPC64_SECTOFF_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_dont, /* complain_on_overflow */
727 ppc64_elf_sectoff_reloc, /* special_function */
728 "R_PPC64_SECTOFF_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* 16-bit upper half adjusted section relative relocation. */
735 HOWTO (R_PPC64_SECTOFF_HA, /* type */
736 16, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_dont, /* complain_on_overflow */
742 ppc64_elf_sectoff_ha_reloc, /* special_function */
743 "R_PPC64_SECTOFF_HA", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* Like R_PPC64_REL24 without touching the two least significant bits. */
750 HOWTO (R_PPC64_REL30, /* type */
751 2, /* rightshift */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
753 30, /* bitsize */
754 TRUE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_dont, /* complain_on_overflow */
757 bfd_elf_generic_reloc, /* special_function */
758 "R_PPC64_REL30", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0xfffffffc, /* dst_mask */
762 TRUE), /* pcrel_offset */
763
764 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
765
766 /* A standard 64-bit relocation. */
767 HOWTO (R_PPC64_ADDR64, /* type */
768 0, /* rightshift */
769 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
770 64, /* bitsize */
771 FALSE, /* pc_relative */
772 0, /* bitpos */
773 complain_overflow_dont, /* complain_on_overflow */
774 bfd_elf_generic_reloc, /* special_function */
775 "R_PPC64_ADDR64", /* name */
776 FALSE, /* partial_inplace */
777 0, /* src_mask */
778 ONES (64), /* dst_mask */
779 FALSE), /* pcrel_offset */
780
781 /* The bits 32-47 of an address. */
782 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
783 32, /* rightshift */
784 1, /* size (0 = byte, 1 = short, 2 = long) */
785 16, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 bfd_elf_generic_reloc, /* special_function */
790 "R_PPC64_ADDR16_HIGHER", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* The bits 32-47 of an address, plus 1 if the contents of the low
797 16 bits, treated as a signed number, is negative. */
798 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
799 32, /* rightshift */
800 1, /* size (0 = byte, 1 = short, 2 = long) */
801 16, /* bitsize */
802 FALSE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_dont, /* complain_on_overflow */
805 ppc64_elf_ha_reloc, /* special_function */
806 "R_PPC64_ADDR16_HIGHERA", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0xffff, /* dst_mask */
810 FALSE), /* pcrel_offset */
811
812 /* The bits 48-63 of an address. */
813 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
814 48, /* rightshift */
815 1, /* size (0 = byte, 1 = short, 2 = long) */
816 16, /* bitsize */
817 FALSE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 bfd_elf_generic_reloc, /* special_function */
821 "R_PPC64_ADDR16_HIGHEST", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 0xffff, /* dst_mask */
825 FALSE), /* pcrel_offset */
826
827 /* The bits 48-63 of an address, plus 1 if the contents of the low
828 16 bits, treated as a signed number, is negative. */
829 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
830 48, /* rightshift */
831 1, /* size (0 = byte, 1 = short, 2 = long) */
832 16, /* bitsize */
833 FALSE, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_dont, /* complain_on_overflow */
836 ppc64_elf_ha_reloc, /* special_function */
837 "R_PPC64_ADDR16_HIGHESTA", /* name */
838 FALSE, /* partial_inplace */
839 0, /* src_mask */
840 0xffff, /* dst_mask */
841 FALSE), /* pcrel_offset */
842
843 /* Like ADDR64, but may be unaligned. */
844 HOWTO (R_PPC64_UADDR64, /* type */
845 0, /* rightshift */
846 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
847 64, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 bfd_elf_generic_reloc, /* special_function */
852 "R_PPC64_UADDR64", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 ONES (64), /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* 64-bit relative relocation. */
859 HOWTO (R_PPC64_REL64, /* type */
860 0, /* rightshift */
861 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
862 64, /* bitsize */
863 TRUE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 "R_PPC64_REL64", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 ONES (64), /* dst_mask */
871 TRUE), /* pcrel_offset */
872
873 /* 64-bit relocation to the symbol's procedure linkage table. */
874 HOWTO (R_PPC64_PLT64, /* type */
875 0, /* rightshift */
876 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
877 64, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 ppc64_elf_unhandled_reloc, /* special_function */
882 "R_PPC64_PLT64", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 ONES (64), /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* 64-bit PC relative relocation to the symbol's procedure linkage
889 table. */
890 /* FIXME: R_PPC64_PLTREL64 not supported. */
891 HOWTO (R_PPC64_PLTREL64, /* type */
892 0, /* rightshift */
893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
894 64, /* bitsize */
895 TRUE, /* pc_relative */
896 0, /* bitpos */
897 complain_overflow_dont, /* complain_on_overflow */
898 ppc64_elf_unhandled_reloc, /* special_function */
899 "R_PPC64_PLTREL64", /* name */
900 FALSE, /* partial_inplace */
901 0, /* src_mask */
902 ONES (64), /* dst_mask */
903 TRUE), /* pcrel_offset */
904
905 /* 16 bit TOC-relative relocation. */
906
907 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
908 HOWTO (R_PPC64_TOC16, /* type */
909 0, /* rightshift */
910 1, /* size (0 = byte, 1 = short, 2 = long) */
911 16, /* bitsize */
912 FALSE, /* pc_relative */
913 0, /* bitpos */
914 complain_overflow_signed, /* complain_on_overflow */
915 ppc64_elf_toc_reloc, /* special_function */
916 "R_PPC64_TOC16", /* name */
917 FALSE, /* partial_inplace */
918 0, /* src_mask */
919 0xffff, /* dst_mask */
920 FALSE), /* pcrel_offset */
921
922 /* 16 bit TOC-relative relocation without overflow. */
923
924 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
925 HOWTO (R_PPC64_TOC16_LO, /* type */
926 0, /* rightshift */
927 1, /* size (0 = byte, 1 = short, 2 = long) */
928 16, /* bitsize */
929 FALSE, /* pc_relative */
930 0, /* bitpos */
931 complain_overflow_dont, /* complain_on_overflow */
932 ppc64_elf_toc_reloc, /* special_function */
933 "R_PPC64_TOC16_LO", /* name */
934 FALSE, /* partial_inplace */
935 0, /* src_mask */
936 0xffff, /* dst_mask */
937 FALSE), /* pcrel_offset */
938
939 /* 16 bit TOC-relative relocation, high 16 bits. */
940
941 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
942 HOWTO (R_PPC64_TOC16_HI, /* type */
943 16, /* rightshift */
944 1, /* size (0 = byte, 1 = short, 2 = long) */
945 16, /* bitsize */
946 FALSE, /* pc_relative */
947 0, /* bitpos */
948 complain_overflow_dont, /* complain_on_overflow */
949 ppc64_elf_toc_reloc, /* special_function */
950 "R_PPC64_TOC16_HI", /* name */
951 FALSE, /* partial_inplace */
952 0, /* src_mask */
953 0xffff, /* dst_mask */
954 FALSE), /* pcrel_offset */
955
956 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
957 contents of the low 16 bits, treated as a signed number, is
958 negative. */
959
960 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
961 HOWTO (R_PPC64_TOC16_HA, /* type */
962 16, /* rightshift */
963 1, /* size (0 = byte, 1 = short, 2 = long) */
964 16, /* bitsize */
965 FALSE, /* pc_relative */
966 0, /* bitpos */
967 complain_overflow_dont, /* complain_on_overflow */
968 ppc64_elf_toc_ha_reloc, /* special_function */
969 "R_PPC64_TOC16_HA", /* name */
970 FALSE, /* partial_inplace */
971 0, /* src_mask */
972 0xffff, /* dst_mask */
973 FALSE), /* pcrel_offset */
974
975 /* 64-bit relocation; insert value of TOC base (.TOC.). */
976
977 /* R_PPC64_TOC 51 doubleword64 .TOC. */
978 HOWTO (R_PPC64_TOC, /* type */
979 0, /* rightshift */
980 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
981 64, /* bitsize */
982 FALSE, /* pc_relative */
983 0, /* bitpos */
984 complain_overflow_bitfield, /* complain_on_overflow */
985 ppc64_elf_toc64_reloc, /* special_function */
986 "R_PPC64_TOC", /* name */
987 FALSE, /* partial_inplace */
988 0, /* src_mask */
989 ONES (64), /* dst_mask */
990 FALSE), /* pcrel_offset */
991
992 /* Like R_PPC64_GOT16, but also informs the link editor that the
993 value to relocate may (!) refer to a PLT entry which the link
994 editor (a) may replace with the symbol value. If the link editor
995 is unable to fully resolve the symbol, it may (b) create a PLT
996 entry and store the address to the new PLT entry in the GOT.
997 This permits lazy resolution of function symbols at run time.
998 The link editor may also skip all of this and just (c) emit a
999 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1000 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1001 HOWTO (R_PPC64_PLTGOT16, /* type */
1002 0, /* rightshift */
1003 1, /* size (0 = byte, 1 = short, 2 = long) */
1004 16, /* bitsize */
1005 FALSE, /* pc_relative */
1006 0, /* bitpos */
1007 complain_overflow_signed, /* complain_on_overflow */
1008 ppc64_elf_unhandled_reloc, /* special_function */
1009 "R_PPC64_PLTGOT16", /* name */
1010 FALSE, /* partial_inplace */
1011 0, /* src_mask */
1012 0xffff, /* dst_mask */
1013 FALSE), /* pcrel_offset */
1014
1015 /* Like R_PPC64_PLTGOT16, but without overflow. */
1016 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1017 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1018 0, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_dont, /* complain_on_overflow */
1024 ppc64_elf_unhandled_reloc, /* special_function */
1025 "R_PPC64_PLTGOT16_LO", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1032 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1033 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc64_elf_unhandled_reloc, /* special_function */
1041 "R_PPC64_PLTGOT16_HI", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1048 1 if the contents of the low 16 bits, treated as a signed number,
1049 is negative. */
1050 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1051 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1052 16, /* rightshift */
1053 1, /* size (0 = byte, 1 = short, 2 = long) */
1054 16, /* bitsize */
1055 FALSE, /* pc_relative */
1056 0, /* bitpos */
1057 complain_overflow_dont,/* complain_on_overflow */
1058 ppc64_elf_unhandled_reloc, /* special_function */
1059 "R_PPC64_PLTGOT16_HA", /* name */
1060 FALSE, /* partial_inplace */
1061 0, /* src_mask */
1062 0xffff, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1064
1065 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1066 HOWTO (R_PPC64_ADDR16_DS, /* type */
1067 0, /* rightshift */
1068 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 16, /* bitsize */
1070 FALSE, /* pc_relative */
1071 0, /* bitpos */
1072 complain_overflow_bitfield, /* complain_on_overflow */
1073 bfd_elf_generic_reloc, /* special_function */
1074 "R_PPC64_ADDR16_DS", /* name */
1075 FALSE, /* partial_inplace */
1076 0, /* src_mask */
1077 0xfffc, /* dst_mask */
1078 FALSE), /* pcrel_offset */
1079
1080 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1081 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1082 0, /* rightshift */
1083 1, /* size (0 = byte, 1 = short, 2 = long) */
1084 16, /* bitsize */
1085 FALSE, /* pc_relative */
1086 0, /* bitpos */
1087 complain_overflow_dont,/* complain_on_overflow */
1088 bfd_elf_generic_reloc, /* special_function */
1089 "R_PPC64_ADDR16_LO_DS",/* name */
1090 FALSE, /* partial_inplace */
1091 0, /* src_mask */
1092 0xfffc, /* dst_mask */
1093 FALSE), /* pcrel_offset */
1094
1095 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1096 HOWTO (R_PPC64_GOT16_DS, /* type */
1097 0, /* rightshift */
1098 1, /* size (0 = byte, 1 = short, 2 = long) */
1099 16, /* bitsize */
1100 FALSE, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_signed, /* complain_on_overflow */
1103 ppc64_elf_unhandled_reloc, /* special_function */
1104 "R_PPC64_GOT16_DS", /* name */
1105 FALSE, /* partial_inplace */
1106 0, /* src_mask */
1107 0xfffc, /* dst_mask */
1108 FALSE), /* pcrel_offset */
1109
1110 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1111 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_dont, /* complain_on_overflow */
1118 ppc64_elf_unhandled_reloc, /* special_function */
1119 "R_PPC64_GOT16_LO_DS", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xfffc, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1126 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc64_elf_unhandled_reloc, /* special_function */
1134 "R_PPC64_PLT16_LO_DS", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xfffc, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1141 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1142 0, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_bitfield, /* complain_on_overflow */
1148 ppc64_elf_sectoff_reloc, /* special_function */
1149 "R_PPC64_SECTOFF_DS", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xfffc, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1156 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1157 0, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc64_elf_sectoff_reloc, /* special_function */
1164 "R_PPC64_SECTOFF_LO_DS",/* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xfffc, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1171 HOWTO (R_PPC64_TOC16_DS, /* type */
1172 0, /* rightshift */
1173 1, /* size (0 = byte, 1 = short, 2 = long) */
1174 16, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_signed, /* complain_on_overflow */
1178 ppc64_elf_toc_reloc, /* special_function */
1179 "R_PPC64_TOC16_DS", /* name */
1180 FALSE, /* partial_inplace */
1181 0, /* src_mask */
1182 0xfffc, /* dst_mask */
1183 FALSE), /* pcrel_offset */
1184
1185 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1186 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1187 0, /* rightshift */
1188 1, /* size (0 = byte, 1 = short, 2 = long) */
1189 16, /* bitsize */
1190 FALSE, /* pc_relative */
1191 0, /* bitpos */
1192 complain_overflow_dont, /* complain_on_overflow */
1193 ppc64_elf_toc_reloc, /* special_function */
1194 "R_PPC64_TOC16_LO_DS", /* name */
1195 FALSE, /* partial_inplace */
1196 0, /* src_mask */
1197 0xfffc, /* dst_mask */
1198 FALSE), /* pcrel_offset */
1199
1200 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1201 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1202 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_unhandled_reloc, /* special_function */
1210 "R_PPC64_PLTGOT16_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1217 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1218 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1219 0, /* rightshift */
1220 1, /* size (0 = byte, 1 = short, 2 = long) */
1221 16, /* bitsize */
1222 FALSE, /* pc_relative */
1223 0, /* bitpos */
1224 complain_overflow_dont, /* complain_on_overflow */
1225 ppc64_elf_unhandled_reloc, /* special_function */
1226 "R_PPC64_PLTGOT16_LO_DS",/* name */
1227 FALSE, /* partial_inplace */
1228 0, /* src_mask */
1229 0xfffc, /* dst_mask */
1230 FALSE), /* pcrel_offset */
1231
1232 /* Marker reloc for TLS. */
1233 HOWTO (R_PPC64_TLS,
1234 0, /* rightshift */
1235 2, /* size (0 = byte, 1 = short, 2 = long) */
1236 32, /* bitsize */
1237 FALSE, /* pc_relative */
1238 0, /* bitpos */
1239 complain_overflow_dont, /* complain_on_overflow */
1240 bfd_elf_generic_reloc, /* special_function */
1241 "R_PPC64_TLS", /* name */
1242 FALSE, /* partial_inplace */
1243 0, /* src_mask */
1244 0, /* dst_mask */
1245 FALSE), /* pcrel_offset */
1246
1247 /* Computes the load module index of the load module that contains the
1248 definition of its TLS sym. */
1249 HOWTO (R_PPC64_DTPMOD64,
1250 0, /* rightshift */
1251 4, /* size (0 = byte, 1 = short, 2 = long) */
1252 64, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_dont, /* complain_on_overflow */
1256 ppc64_elf_unhandled_reloc, /* special_function */
1257 "R_PPC64_DTPMOD64", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 ONES (64), /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 /* Computes a dtv-relative displacement, the difference between the value
1264 of sym+add and the base address of the thread-local storage block that
1265 contains the definition of sym, minus 0x8000. */
1266 HOWTO (R_PPC64_DTPREL64,
1267 0, /* rightshift */
1268 4, /* size (0 = byte, 1 = short, 2 = long) */
1269 64, /* bitsize */
1270 FALSE, /* pc_relative */
1271 0, /* bitpos */
1272 complain_overflow_dont, /* complain_on_overflow */
1273 ppc64_elf_unhandled_reloc, /* special_function */
1274 "R_PPC64_DTPREL64", /* name */
1275 FALSE, /* partial_inplace */
1276 0, /* src_mask */
1277 ONES (64), /* dst_mask */
1278 FALSE), /* pcrel_offset */
1279
1280 /* A 16 bit dtprel reloc. */
1281 HOWTO (R_PPC64_DTPREL16,
1282 0, /* rightshift */
1283 1, /* size (0 = byte, 1 = short, 2 = long) */
1284 16, /* bitsize */
1285 FALSE, /* pc_relative */
1286 0, /* bitpos */
1287 complain_overflow_signed, /* complain_on_overflow */
1288 ppc64_elf_unhandled_reloc, /* special_function */
1289 "R_PPC64_DTPREL16", /* name */
1290 FALSE, /* partial_inplace */
1291 0, /* src_mask */
1292 0xffff, /* dst_mask */
1293 FALSE), /* pcrel_offset */
1294
1295 /* Like DTPREL16, but no overflow. */
1296 HOWTO (R_PPC64_DTPREL16_LO,
1297 0, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 ppc64_elf_unhandled_reloc, /* special_function */
1304 "R_PPC64_DTPREL16_LO", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1311 HOWTO (R_PPC64_DTPREL16_HI,
1312 16, /* rightshift */
1313 1, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_dont, /* complain_on_overflow */
1318 ppc64_elf_unhandled_reloc, /* special_function */
1319 "R_PPC64_DTPREL16_HI", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1326 HOWTO (R_PPC64_DTPREL16_HA,
1327 16, /* rightshift */
1328 1, /* size (0 = byte, 1 = short, 2 = long) */
1329 16, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL16_HA", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 0xffff, /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1341 HOWTO (R_PPC64_DTPREL16_HIGHER,
1342 32, /* rightshift */
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1344 16, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_dont, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16_HIGHER", /* name */
1350 FALSE, /* partial_inplace */
1351 0, /* src_mask */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1356 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1357 32, /* rightshift */
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_HIGHERA", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1371 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1372 48, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HIGHEST", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1387 48, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16, but for insns with a DS field. */
1401 HOWTO (R_PPC64_DTPREL16_DS,
1402 0, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_signed, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_DS", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xfffc, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_DS, but no overflow. */
1416 HOWTO (R_PPC64_DTPREL16_LO_DS,
1417 0, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_LO_DS", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xfffc, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Computes a tp-relative displacement, the difference between the value of
1431 sym+add and the value of the thread pointer (r13). */
1432 HOWTO (R_PPC64_TPREL64,
1433 0, /* rightshift */
1434 4, /* size (0 = byte, 1 = short, 2 = long) */
1435 64, /* bitsize */
1436 FALSE, /* pc_relative */
1437 0, /* bitpos */
1438 complain_overflow_dont, /* complain_on_overflow */
1439 ppc64_elf_unhandled_reloc, /* special_function */
1440 "R_PPC64_TPREL64", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 ONES (64), /* dst_mask */
1444 FALSE), /* pcrel_offset */
1445
1446 /* A 16 bit tprel reloc. */
1447 HOWTO (R_PPC64_TPREL16,
1448 0, /* rightshift */
1449 1, /* size (0 = byte, 1 = short, 2 = long) */
1450 16, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_signed, /* complain_on_overflow */
1454 ppc64_elf_unhandled_reloc, /* special_function */
1455 "R_PPC64_TPREL16", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0xffff, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* Like TPREL16, but no overflow. */
1462 HOWTO (R_PPC64_TPREL16_LO,
1463 0, /* rightshift */
1464 1, /* size (0 = byte, 1 = short, 2 = long) */
1465 16, /* bitsize */
1466 FALSE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_dont, /* complain_on_overflow */
1469 ppc64_elf_unhandled_reloc, /* special_function */
1470 "R_PPC64_TPREL16_LO", /* name */
1471 FALSE, /* partial_inplace */
1472 0, /* src_mask */
1473 0xffff, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1475
1476 /* Like TPREL16_LO, but next higher group of 16 bits. */
1477 HOWTO (R_PPC64_TPREL16_HI,
1478 16, /* rightshift */
1479 1, /* size (0 = byte, 1 = short, 2 = long) */
1480 16, /* bitsize */
1481 FALSE, /* pc_relative */
1482 0, /* bitpos */
1483 complain_overflow_dont, /* complain_on_overflow */
1484 ppc64_elf_unhandled_reloc, /* special_function */
1485 "R_PPC64_TPREL16_HI", /* name */
1486 FALSE, /* partial_inplace */
1487 0, /* src_mask */
1488 0xffff, /* dst_mask */
1489 FALSE), /* pcrel_offset */
1490
1491 /* Like TPREL16_HI, but adjust for low 16 bits. */
1492 HOWTO (R_PPC64_TPREL16_HA,
1493 16, /* rightshift */
1494 1, /* size (0 = byte, 1 = short, 2 = long) */
1495 16, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL16_HA", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 0xffff, /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* Like TPREL16_HI, but next higher group of 16 bits. */
1507 HOWTO (R_PPC64_TPREL16_HIGHER,
1508 32, /* rightshift */
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_dont, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16_HIGHER", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1522 HOWTO (R_PPC64_TPREL16_HIGHERA,
1523 32, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_HIGHERA", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1537 HOWTO (R_PPC64_TPREL16_HIGHEST,
1538 48, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1540 16, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HIGHEST", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1553 48, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HIGHESTA", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16, but for insns with a DS field. */
1567 HOWTO (R_PPC64_TPREL16_DS,
1568 0, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_signed, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_DS", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xfffc, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_DS, but no overflow. */
1582 HOWTO (R_PPC64_TPREL16_LO_DS,
1583 0, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_LO_DS", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xfffc, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1597 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1598 to the first entry relative to the TOC base (r2). */
1599 HOWTO (R_PPC64_GOT_TLSGD16,
1600 0, /* rightshift */
1601 1, /* size (0 = byte, 1 = short, 2 = long) */
1602 16, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_signed, /* complain_on_overflow */
1606 ppc64_elf_unhandled_reloc, /* special_function */
1607 "R_PPC64_GOT_TLSGD16", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0xffff, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Like GOT_TLSGD16, but no overflow. */
1614 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1615 0, /* rightshift */
1616 1, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_dont, /* complain_on_overflow */
1621 ppc64_elf_unhandled_reloc, /* special_function */
1622 "R_PPC64_GOT_TLSGD16_LO", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0xffff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627
1628 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1629 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1630 16, /* rightshift */
1631 1, /* size (0 = byte, 1 = short, 2 = long) */
1632 16, /* bitsize */
1633 FALSE, /* pc_relative */
1634 0, /* bitpos */
1635 complain_overflow_dont, /* complain_on_overflow */
1636 ppc64_elf_unhandled_reloc, /* special_function */
1637 "R_PPC64_GOT_TLSGD16_HI", /* name */
1638 FALSE, /* partial_inplace */
1639 0, /* src_mask */
1640 0xffff, /* dst_mask */
1641 FALSE), /* pcrel_offset */
1642
1643 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1644 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1645 16, /* rightshift */
1646 1, /* size (0 = byte, 1 = short, 2 = long) */
1647 16, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_dont, /* complain_on_overflow */
1651 ppc64_elf_unhandled_reloc, /* special_function */
1652 "R_PPC64_GOT_TLSGD16_HA", /* name */
1653 FALSE, /* partial_inplace */
1654 0, /* src_mask */
1655 0xffff, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1659 with values (sym+add)@dtpmod and zero, and computes the offset to the
1660 first entry relative to the TOC base (r2). */
1661 HOWTO (R_PPC64_GOT_TLSLD16,
1662 0, /* rightshift */
1663 1, /* size (0 = byte, 1 = short, 2 = long) */
1664 16, /* bitsize */
1665 FALSE, /* pc_relative */
1666 0, /* bitpos */
1667 complain_overflow_signed, /* complain_on_overflow */
1668 ppc64_elf_unhandled_reloc, /* special_function */
1669 "R_PPC64_GOT_TLSLD16", /* name */
1670 FALSE, /* partial_inplace */
1671 0, /* src_mask */
1672 0xffff, /* dst_mask */
1673 FALSE), /* pcrel_offset */
1674
1675 /* Like GOT_TLSLD16, but no overflow. */
1676 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1677 0, /* rightshift */
1678 1, /* size (0 = byte, 1 = short, 2 = long) */
1679 16, /* bitsize */
1680 FALSE, /* pc_relative */
1681 0, /* bitpos */
1682 complain_overflow_dont, /* complain_on_overflow */
1683 ppc64_elf_unhandled_reloc, /* special_function */
1684 "R_PPC64_GOT_TLSLD16_LO", /* name */
1685 FALSE, /* partial_inplace */
1686 0, /* src_mask */
1687 0xffff, /* dst_mask */
1688 FALSE), /* pcrel_offset */
1689
1690 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1691 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1692 16, /* rightshift */
1693 1, /* size (0 = byte, 1 = short, 2 = long) */
1694 16, /* bitsize */
1695 FALSE, /* pc_relative */
1696 0, /* bitpos */
1697 complain_overflow_dont, /* complain_on_overflow */
1698 ppc64_elf_unhandled_reloc, /* special_function */
1699 "R_PPC64_GOT_TLSLD16_HI", /* name */
1700 FALSE, /* partial_inplace */
1701 0, /* src_mask */
1702 0xffff, /* dst_mask */
1703 FALSE), /* pcrel_offset */
1704
1705 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1706 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1707 16, /* rightshift */
1708 1, /* size (0 = byte, 1 = short, 2 = long) */
1709 16, /* bitsize */
1710 FALSE, /* pc_relative */
1711 0, /* bitpos */
1712 complain_overflow_dont, /* complain_on_overflow */
1713 ppc64_elf_unhandled_reloc, /* special_function */
1714 "R_PPC64_GOT_TLSLD16_HA", /* name */
1715 FALSE, /* partial_inplace */
1716 0, /* src_mask */
1717 0xffff, /* dst_mask */
1718 FALSE), /* pcrel_offset */
1719
1720 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1721 the offset to the entry relative to the TOC base (r2). */
1722 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1723 0, /* rightshift */
1724 1, /* size (0 = byte, 1 = short, 2 = long) */
1725 16, /* bitsize */
1726 FALSE, /* pc_relative */
1727 0, /* bitpos */
1728 complain_overflow_signed, /* complain_on_overflow */
1729 ppc64_elf_unhandled_reloc, /* special_function */
1730 "R_PPC64_GOT_DTPREL16_DS", /* name */
1731 FALSE, /* partial_inplace */
1732 0, /* src_mask */
1733 0xfffc, /* dst_mask */
1734 FALSE), /* pcrel_offset */
1735
1736 /* Like GOT_DTPREL16_DS, but no overflow. */
1737 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1738 0, /* rightshift */
1739 1, /* size (0 = byte, 1 = short, 2 = long) */
1740 16, /* bitsize */
1741 FALSE, /* pc_relative */
1742 0, /* bitpos */
1743 complain_overflow_dont, /* complain_on_overflow */
1744 ppc64_elf_unhandled_reloc, /* special_function */
1745 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1746 FALSE, /* partial_inplace */
1747 0, /* src_mask */
1748 0xfffc, /* dst_mask */
1749 FALSE), /* pcrel_offset */
1750
1751 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1752 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1753 16, /* rightshift */
1754 1, /* size (0 = byte, 1 = short, 2 = long) */
1755 16, /* bitsize */
1756 FALSE, /* pc_relative */
1757 0, /* bitpos */
1758 complain_overflow_dont, /* complain_on_overflow */
1759 ppc64_elf_unhandled_reloc, /* special_function */
1760 "R_PPC64_GOT_DTPREL16_HI", /* name */
1761 FALSE, /* partial_inplace */
1762 0, /* src_mask */
1763 0xffff, /* dst_mask */
1764 FALSE), /* pcrel_offset */
1765
1766 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1767 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1768 16, /* rightshift */
1769 1, /* size (0 = byte, 1 = short, 2 = long) */
1770 16, /* bitsize */
1771 FALSE, /* pc_relative */
1772 0, /* bitpos */
1773 complain_overflow_dont, /* complain_on_overflow */
1774 ppc64_elf_unhandled_reloc, /* special_function */
1775 "R_PPC64_GOT_DTPREL16_HA", /* name */
1776 FALSE, /* partial_inplace */
1777 0, /* src_mask */
1778 0xffff, /* dst_mask */
1779 FALSE), /* pcrel_offset */
1780
1781 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1782 offset to the entry relative to the TOC base (r2). */
1783 HOWTO (R_PPC64_GOT_TPREL16_DS,
1784 0, /* rightshift */
1785 1, /* size (0 = byte, 1 = short, 2 = long) */
1786 16, /* bitsize */
1787 FALSE, /* pc_relative */
1788 0, /* bitpos */
1789 complain_overflow_signed, /* complain_on_overflow */
1790 ppc64_elf_unhandled_reloc, /* special_function */
1791 "R_PPC64_GOT_TPREL16_DS", /* name */
1792 FALSE, /* partial_inplace */
1793 0, /* src_mask */
1794 0xfffc, /* dst_mask */
1795 FALSE), /* pcrel_offset */
1796
1797 /* Like GOT_TPREL16_DS, but no overflow. */
1798 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1799 0, /* rightshift */
1800 1, /* size (0 = byte, 1 = short, 2 = long) */
1801 16, /* bitsize */
1802 FALSE, /* pc_relative */
1803 0, /* bitpos */
1804 complain_overflow_dont, /* complain_on_overflow */
1805 ppc64_elf_unhandled_reloc, /* special_function */
1806 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1807 FALSE, /* partial_inplace */
1808 0, /* src_mask */
1809 0xfffc, /* dst_mask */
1810 FALSE), /* pcrel_offset */
1811
1812 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1813 HOWTO (R_PPC64_GOT_TPREL16_HI,
1814 16, /* rightshift */
1815 1, /* size (0 = byte, 1 = short, 2 = long) */
1816 16, /* bitsize */
1817 FALSE, /* pc_relative */
1818 0, /* bitpos */
1819 complain_overflow_dont, /* complain_on_overflow */
1820 ppc64_elf_unhandled_reloc, /* special_function */
1821 "R_PPC64_GOT_TPREL16_HI", /* name */
1822 FALSE, /* partial_inplace */
1823 0, /* src_mask */
1824 0xffff, /* dst_mask */
1825 FALSE), /* pcrel_offset */
1826
1827 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1828 HOWTO (R_PPC64_GOT_TPREL16_HA,
1829 16, /* rightshift */
1830 1, /* size (0 = byte, 1 = short, 2 = long) */
1831 16, /* bitsize */
1832 FALSE, /* pc_relative */
1833 0, /* bitpos */
1834 complain_overflow_dont, /* complain_on_overflow */
1835 ppc64_elf_unhandled_reloc, /* special_function */
1836 "R_PPC64_GOT_TPREL16_HA", /* name */
1837 FALSE, /* partial_inplace */
1838 0, /* src_mask */
1839 0xffff, /* dst_mask */
1840 FALSE), /* pcrel_offset */
1841
1842 /* GNU extension to record C++ vtable hierarchy. */
1843 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1844 0, /* rightshift */
1845 0, /* size (0 = byte, 1 = short, 2 = long) */
1846 0, /* bitsize */
1847 FALSE, /* pc_relative */
1848 0, /* bitpos */
1849 complain_overflow_dont, /* complain_on_overflow */
1850 NULL, /* special_function */
1851 "R_PPC64_GNU_VTINHERIT", /* name */
1852 FALSE, /* partial_inplace */
1853 0, /* src_mask */
1854 0, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1856
1857 /* GNU extension to record C++ vtable member usage. */
1858 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1859 0, /* rightshift */
1860 0, /* size (0 = byte, 1 = short, 2 = long) */
1861 0, /* bitsize */
1862 FALSE, /* pc_relative */
1863 0, /* bitpos */
1864 complain_overflow_dont, /* complain_on_overflow */
1865 NULL, /* special_function */
1866 "R_PPC64_GNU_VTENTRY", /* name */
1867 FALSE, /* partial_inplace */
1868 0, /* src_mask */
1869 0, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1871 };
1872
1873 \f
1874 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1875 be done. */
1876
1877 static void
1878 ppc_howto_init (void)
1879 {
1880 unsigned int i, type;
1881
1882 for (i = 0;
1883 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1884 i++)
1885 {
1886 type = ppc64_elf_howto_raw[i].type;
1887 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1888 / sizeof (ppc64_elf_howto_table[0])));
1889 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1890 }
1891 }
1892
1893 static reloc_howto_type *
1894 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1895 bfd_reloc_code_real_type code)
1896 {
1897 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1898
1899 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1900 /* Initialize howto table if needed. */
1901 ppc_howto_init ();
1902
1903 switch (code)
1904 {
1905 default:
1906 return NULL;
1907
1908 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1909 break;
1910 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1911 break;
1912 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1913 break;
1914 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1915 break;
1916 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1917 break;
1918 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1919 break;
1920 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1921 break;
1922 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1923 break;
1924 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1925 break;
1926 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1927 break;
1928 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1929 break;
1930 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1931 break;
1932 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1933 break;
1934 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1935 break;
1936 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1937 break;
1938 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1939 break;
1940 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1941 break;
1942 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1943 break;
1944 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1945 break;
1946 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1947 break;
1948 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1949 break;
1950 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1951 break;
1952 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1953 break;
1954 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1955 break;
1956 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1957 break;
1958 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1959 break;
1960 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1961 break;
1962 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1963 break;
1964 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1965 break;
1966 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1967 break;
1968 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1969 break;
1970 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1971 break;
1972 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1973 break;
1974 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1975 break;
1976 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1977 break;
1978 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1979 break;
1980 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1981 break;
1982 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1983 break;
1984 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1985 break;
1986 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1987 break;
1988 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1989 break;
1990 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1991 break;
1992 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1993 break;
1994 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1995 break;
1996 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1997 break;
1998 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1999 break;
2000 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2001 break;
2002 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2003 break;
2004 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2005 break;
2006 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2007 break;
2008 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2009 break;
2010 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2011 break;
2012 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2013 break;
2014 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2015 break;
2016 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2017 break;
2018 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2019 break;
2020 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2021 break;
2022 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2023 break;
2024 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2025 break;
2026 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2027 break;
2028 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2029 break;
2030 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2031 break;
2032 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2033 break;
2034 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2035 break;
2036 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2037 break;
2038 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2039 break;
2040 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2041 break;
2042 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2043 break;
2044 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2045 break;
2046 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2047 break;
2048 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2049 break;
2050 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2051 break;
2052 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2053 break;
2054 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2065 break;
2066 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2067 break;
2068 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2069 break;
2070 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2071 break;
2072 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2073 break;
2074 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2075 break;
2076 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2077 break;
2078 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2079 break;
2080 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2081 break;
2082 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2083 break;
2084 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2085 break;
2086 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2087 break;
2088 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2089 break;
2090 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2091 break;
2092 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2093 break;
2094 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2095 break;
2096 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2097 break;
2098 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2099 break;
2100 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2101 break;
2102 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2103 break;
2104 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2105 break;
2106 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2107 break;
2108 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2109 break;
2110 }
2111
2112 return ppc64_elf_howto_table[r];
2113 };
2114
2115 static reloc_howto_type *
2116 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2117 const char *r_name)
2118 {
2119 unsigned int i;
2120
2121 for (i = 0;
2122 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2123 i++)
2124 if (ppc64_elf_howto_raw[i].name != NULL
2125 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2126 return &ppc64_elf_howto_raw[i];
2127
2128 return NULL;
2129 }
2130
2131 /* Set the howto pointer for a PowerPC ELF reloc. */
2132
2133 static void
2134 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2135 Elf_Internal_Rela *dst)
2136 {
2137 unsigned int type;
2138
2139 /* Initialize howto table if needed. */
2140 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2141 ppc_howto_init ();
2142
2143 type = ELF64_R_TYPE (dst->r_info);
2144 if (type >= (sizeof (ppc64_elf_howto_table)
2145 / sizeof (ppc64_elf_howto_table[0])))
2146 {
2147 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2148 abfd, (int) type);
2149 type = R_PPC64_NONE;
2150 }
2151 cache_ptr->howto = ppc64_elf_howto_table[type];
2152 }
2153
2154 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2155
2156 static bfd_reloc_status_type
2157 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2158 void *data, asection *input_section,
2159 bfd *output_bfd, char **error_message)
2160 {
2161 /* If this is a relocatable link (output_bfd test tells us), just
2162 call the generic function. Any adjustment will be done at final
2163 link time. */
2164 if (output_bfd != NULL)
2165 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2166 input_section, output_bfd, error_message);
2167
2168 /* Adjust the addend for sign extension of the low 16 bits.
2169 We won't actually be using the low 16 bits, so trashing them
2170 doesn't matter. */
2171 reloc_entry->addend += 0x8000;
2172 return bfd_reloc_continue;
2173 }
2174
2175 static bfd_reloc_status_type
2176 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2177 void *data, asection *input_section,
2178 bfd *output_bfd, char **error_message)
2179 {
2180 if (output_bfd != NULL)
2181 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2182 input_section, output_bfd, error_message);
2183
2184 if (strcmp (symbol->section->name, ".opd") == 0
2185 && (symbol->section->owner->flags & DYNAMIC) == 0)
2186 {
2187 bfd_vma dest = opd_entry_value (symbol->section,
2188 symbol->value + reloc_entry->addend,
2189 NULL, NULL);
2190 if (dest != (bfd_vma) -1)
2191 reloc_entry->addend = dest - (symbol->value
2192 + symbol->section->output_section->vma
2193 + symbol->section->output_offset);
2194 }
2195 return bfd_reloc_continue;
2196 }
2197
2198 static bfd_reloc_status_type
2199 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2200 void *data, asection *input_section,
2201 bfd *output_bfd, char **error_message)
2202 {
2203 long insn;
2204 enum elf_ppc64_reloc_type r_type;
2205 bfd_size_type octets;
2206 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2207 bfd_boolean is_power4 = FALSE;
2208
2209 /* If this is a relocatable link (output_bfd test tells us), just
2210 call the generic function. Any adjustment will be done at final
2211 link time. */
2212 if (output_bfd != NULL)
2213 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2214 input_section, output_bfd, error_message);
2215
2216 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2217 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2218 insn &= ~(0x01 << 21);
2219 r_type = reloc_entry->howto->type;
2220 if (r_type == R_PPC64_ADDR14_BRTAKEN
2221 || r_type == R_PPC64_REL14_BRTAKEN)
2222 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2223
2224 if (is_power4)
2225 {
2226 /* Set 'a' bit. This is 0b00010 in BO field for branch
2227 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2228 for branch on CTR insns (BO == 1a00t or 1a01t). */
2229 if ((insn & (0x14 << 21)) == (0x04 << 21))
2230 insn |= 0x02 << 21;
2231 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2232 insn |= 0x08 << 21;
2233 else
2234 goto out;
2235 }
2236 else
2237 {
2238 bfd_vma target = 0;
2239 bfd_vma from;
2240
2241 if (!bfd_is_com_section (symbol->section))
2242 target = symbol->value;
2243 target += symbol->section->output_section->vma;
2244 target += symbol->section->output_offset;
2245 target += reloc_entry->addend;
2246
2247 from = (reloc_entry->address
2248 + input_section->output_offset
2249 + input_section->output_section->vma);
2250
2251 /* Invert 'y' bit if not the default. */
2252 if ((bfd_signed_vma) (target - from) < 0)
2253 insn ^= 0x01 << 21;
2254 }
2255 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2256 out:
2257 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2258 input_section, output_bfd, error_message);
2259 }
2260
2261 static bfd_reloc_status_type
2262 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2263 void *data, asection *input_section,
2264 bfd *output_bfd, char **error_message)
2265 {
2266 /* If this is a relocatable link (output_bfd test tells us), just
2267 call the generic function. Any adjustment will be done at final
2268 link time. */
2269 if (output_bfd != NULL)
2270 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2271 input_section, output_bfd, error_message);
2272
2273 /* Subtract the symbol section base address. */
2274 reloc_entry->addend -= symbol->section->output_section->vma;
2275 return bfd_reloc_continue;
2276 }
2277
2278 static bfd_reloc_status_type
2279 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2280 void *data, asection *input_section,
2281 bfd *output_bfd, char **error_message)
2282 {
2283 /* If this is a relocatable link (output_bfd test tells us), just
2284 call the generic function. Any adjustment will be done at final
2285 link time. */
2286 if (output_bfd != NULL)
2287 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2288 input_section, output_bfd, error_message);
2289
2290 /* Subtract the symbol section base address. */
2291 reloc_entry->addend -= symbol->section->output_section->vma;
2292
2293 /* Adjust the addend for sign extension of the low 16 bits. */
2294 reloc_entry->addend += 0x8000;
2295 return bfd_reloc_continue;
2296 }
2297
2298 static bfd_reloc_status_type
2299 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2300 void *data, asection *input_section,
2301 bfd *output_bfd, char **error_message)
2302 {
2303 bfd_vma TOCstart;
2304
2305 /* If this is a relocatable link (output_bfd test tells us), just
2306 call the generic function. Any adjustment will be done at final
2307 link time. */
2308 if (output_bfd != NULL)
2309 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2310 input_section, output_bfd, error_message);
2311
2312 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2313 if (TOCstart == 0)
2314 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2315
2316 /* Subtract the TOC base address. */
2317 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2318 return bfd_reloc_continue;
2319 }
2320
2321 static bfd_reloc_status_type
2322 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2323 void *data, asection *input_section,
2324 bfd *output_bfd, char **error_message)
2325 {
2326 bfd_vma TOCstart;
2327
2328 /* If this is a relocatable link (output_bfd test tells us), just
2329 call the generic function. Any adjustment will be done at final
2330 link time. */
2331 if (output_bfd != NULL)
2332 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2333 input_section, output_bfd, error_message);
2334
2335 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2336 if (TOCstart == 0)
2337 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2338
2339 /* Subtract the TOC base address. */
2340 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2341
2342 /* Adjust the addend for sign extension of the low 16 bits. */
2343 reloc_entry->addend += 0x8000;
2344 return bfd_reloc_continue;
2345 }
2346
2347 static bfd_reloc_status_type
2348 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2349 void *data, asection *input_section,
2350 bfd *output_bfd, char **error_message)
2351 {
2352 bfd_vma TOCstart;
2353 bfd_size_type octets;
2354
2355 /* If this is a relocatable link (output_bfd test tells us), just
2356 call the generic function. Any adjustment will be done at final
2357 link time. */
2358 if (output_bfd != NULL)
2359 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2360 input_section, output_bfd, error_message);
2361
2362 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2363 if (TOCstart == 0)
2364 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2365
2366 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2367 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2368 return bfd_reloc_ok;
2369 }
2370
2371 static bfd_reloc_status_type
2372 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2373 void *data, asection *input_section,
2374 bfd *output_bfd, char **error_message)
2375 {
2376 /* If this is a relocatable link (output_bfd test tells us), just
2377 call the generic function. Any adjustment will be done at final
2378 link time. */
2379 if (output_bfd != NULL)
2380 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2381 input_section, output_bfd, error_message);
2382
2383 if (error_message != NULL)
2384 {
2385 static char buf[60];
2386 sprintf (buf, "generic linker can't handle %s",
2387 reloc_entry->howto->name);
2388 *error_message = buf;
2389 }
2390 return bfd_reloc_dangerous;
2391 }
2392
2393 struct ppc64_elf_obj_tdata
2394 {
2395 struct elf_obj_tdata elf;
2396
2397 /* Shortcuts to dynamic linker sections. */
2398 asection *got;
2399 asection *relgot;
2400
2401 /* Used during garbage collection. We attach global symbols defined
2402 on removed .opd entries to this section so that the sym is removed. */
2403 asection *deleted_section;
2404
2405 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2406 sections means we potentially need one of these for each input bfd. */
2407 union {
2408 bfd_signed_vma refcount;
2409 bfd_vma offset;
2410 } tlsld_got;
2411
2412 /* A copy of relocs before they are modified for --emit-relocs. */
2413 Elf_Internal_Rela *opd_relocs;
2414 };
2415
2416 #define ppc64_elf_tdata(bfd) \
2417 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2418
2419 #define ppc64_tlsld_got(bfd) \
2420 (&ppc64_elf_tdata (bfd)->tlsld_got)
2421
2422 /* Override the generic function because we store some extras. */
2423
2424 static bfd_boolean
2425 ppc64_elf_mkobject (bfd *abfd)
2426 {
2427 if (abfd->tdata.any == NULL)
2428 {
2429 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2430 abfd->tdata.any = bfd_zalloc (abfd, amt);
2431 if (abfd->tdata.any == NULL)
2432 return FALSE;
2433 }
2434 return bfd_elf_mkobject (abfd);
2435 }
2436
2437 /* Return 1 if target is one of ours. */
2438
2439 static bfd_boolean
2440 is_ppc64_elf_target (const struct bfd_target *targ)
2441 {
2442 extern const bfd_target bfd_elf64_powerpc_vec;
2443 extern const bfd_target bfd_elf64_powerpcle_vec;
2444
2445 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2446 }
2447
2448 /* Fix bad default arch selected for a 64 bit input bfd when the
2449 default is 32 bit. */
2450
2451 static bfd_boolean
2452 ppc64_elf_object_p (bfd *abfd)
2453 {
2454 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2455 {
2456 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2457
2458 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2459 {
2460 /* Relies on arch after 32 bit default being 64 bit default. */
2461 abfd->arch_info = abfd->arch_info->next;
2462 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2463 }
2464 }
2465 return TRUE;
2466 }
2467
2468 /* Support for core dump NOTE sections. */
2469
2470 static bfd_boolean
2471 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2472 {
2473 size_t offset, size;
2474
2475 if (note->descsz != 504)
2476 return FALSE;
2477
2478 /* pr_cursig */
2479 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2480
2481 /* pr_pid */
2482 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2483
2484 /* pr_reg */
2485 offset = 112;
2486 size = 384;
2487
2488 /* Make a ".reg/999" section. */
2489 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2490 size, note->descpos + offset);
2491 }
2492
2493 static bfd_boolean
2494 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2495 {
2496 if (note->descsz != 136)
2497 return FALSE;
2498
2499 elf_tdata (abfd)->core_program
2500 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2501 elf_tdata (abfd)->core_command
2502 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2503
2504 return TRUE;
2505 }
2506
2507 static char *
2508 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2509 ...)
2510 {
2511 switch (note_type)
2512 {
2513 default:
2514 return NULL;
2515
2516 case NT_PRPSINFO:
2517 {
2518 char data[136];
2519 va_list ap;
2520
2521 va_start (ap, note_type);
2522 memset (data, 0, 40);
2523 strncpy (data + 40, va_arg (ap, const char *), 16);
2524 strncpy (data + 56, va_arg (ap, const char *), 80);
2525 va_end (ap);
2526 return elfcore_write_note (abfd, buf, bufsiz,
2527 "CORE", note_type, data, sizeof (data));
2528 }
2529
2530 case NT_PRSTATUS:
2531 {
2532 char data[504];
2533 va_list ap;
2534 long pid;
2535 int cursig;
2536 const void *greg;
2537
2538 va_start (ap, note_type);
2539 memset (data, 0, 112);
2540 pid = va_arg (ap, long);
2541 bfd_put_32 (abfd, pid, data + 32);
2542 cursig = va_arg (ap, int);
2543 bfd_put_16 (abfd, cursig, data + 12);
2544 greg = va_arg (ap, const void *);
2545 memcpy (data + 112, greg, 384);
2546 memset (data + 496, 0, 8);
2547 va_end (ap);
2548 return elfcore_write_note (abfd, buf, bufsiz,
2549 "CORE", note_type, data, sizeof (data));
2550 }
2551 }
2552 }
2553
2554 /* Merge backend specific data from an object file to the output
2555 object file when linking. */
2556
2557 static bfd_boolean
2558 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2559 {
2560 /* Check if we have the same endianess. */
2561 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2562 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2563 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2564 {
2565 const char *msg;
2566
2567 if (bfd_big_endian (ibfd))
2568 msg = _("%B: compiled for a big endian system "
2569 "and target is little endian");
2570 else
2571 msg = _("%B: compiled for a little endian system "
2572 "and target is big endian");
2573
2574 (*_bfd_error_handler) (msg, ibfd);
2575
2576 bfd_set_error (bfd_error_wrong_format);
2577 return FALSE;
2578 }
2579
2580 return TRUE;
2581 }
2582
2583 /* Add extra PPC sections. */
2584
2585 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2586 {
2587 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2588 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2589 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2590 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2591 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2592 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2593 { NULL, 0, 0, 0, 0 }
2594 };
2595
2596 enum _ppc64_sec_type {
2597 sec_normal = 0,
2598 sec_opd = 1,
2599 sec_toc = 2
2600 };
2601
2602 struct _ppc64_elf_section_data
2603 {
2604 struct bfd_elf_section_data elf;
2605
2606 /* An array with one entry for each opd function descriptor. */
2607 union
2608 {
2609 /* Points to the function code section for local opd entries. */
2610 asection **opd_func_sec;
2611 /* After editing .opd, adjust references to opd local syms. */
2612 long *opd_adjust;
2613
2614 /* An array for toc sections, indexed by offset/8.
2615 Specifies the relocation symbol index used at a given toc offset. */
2616 unsigned *t_symndx;
2617 } u;
2618
2619 enum _ppc64_sec_type sec_type:2;
2620
2621 /* Flag set when small branches are detected. Used to
2622 select suitable defaults for the stub group size. */
2623 unsigned int has_14bit_branch:1;
2624 };
2625
2626 #define ppc64_elf_section_data(sec) \
2627 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2628
2629 static bfd_boolean
2630 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2631 {
2632 if (!sec->used_by_bfd)
2633 {
2634 struct _ppc64_elf_section_data *sdata;
2635 bfd_size_type amt = sizeof (*sdata);
2636
2637 sdata = bfd_zalloc (abfd, amt);
2638 if (sdata == NULL)
2639 return FALSE;
2640 sec->used_by_bfd = sdata;
2641 }
2642
2643 return _bfd_elf_new_section_hook (abfd, sec);
2644 }
2645
2646 static void *
2647 get_opd_info (asection * sec)
2648 {
2649 if (sec != NULL
2650 && ppc64_elf_section_data (sec) != NULL
2651 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2652 return ppc64_elf_section_data (sec)->u.opd_adjust;
2653 return NULL;
2654 }
2655 \f
2656 /* Parameters for the qsort hook. */
2657 static asection *synthetic_opd;
2658 static bfd_boolean synthetic_relocatable;
2659
2660 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2661
2662 static int
2663 compare_symbols (const void *ap, const void *bp)
2664 {
2665 const asymbol *a = * (const asymbol **) ap;
2666 const asymbol *b = * (const asymbol **) bp;
2667
2668 /* Section symbols first. */
2669 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2670 return -1;
2671 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2672 return 1;
2673
2674 /* then .opd symbols. */
2675 if (a->section == synthetic_opd && b->section != synthetic_opd)
2676 return -1;
2677 if (a->section != synthetic_opd && b->section == synthetic_opd)
2678 return 1;
2679
2680 /* then other code symbols. */
2681 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2682 == (SEC_CODE | SEC_ALLOC)
2683 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2684 != (SEC_CODE | SEC_ALLOC))
2685 return -1;
2686
2687 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2688 != (SEC_CODE | SEC_ALLOC)
2689 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2690 == (SEC_CODE | SEC_ALLOC))
2691 return 1;
2692
2693 if (synthetic_relocatable)
2694 {
2695 if (a->section->id < b->section->id)
2696 return -1;
2697
2698 if (a->section->id > b->section->id)
2699 return 1;
2700 }
2701
2702 if (a->value + a->section->vma < b->value + b->section->vma)
2703 return -1;
2704
2705 if (a->value + a->section->vma > b->value + b->section->vma)
2706 return 1;
2707
2708 /* For syms with the same value, prefer strong dynamic global function
2709 syms over other syms. */
2710 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2711 return -1;
2712
2713 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2714 return 1;
2715
2716 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2717 return -1;
2718
2719 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2720 return 1;
2721
2722 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2723 return -1;
2724
2725 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2726 return 1;
2727
2728 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2729 return -1;
2730
2731 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2732 return 1;
2733
2734 return 0;
2735 }
2736
2737 /* Search SYMS for a symbol of the given VALUE. */
2738
2739 static asymbol *
2740 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2741 {
2742 long mid;
2743
2744 if (id == -1)
2745 {
2746 while (lo < hi)
2747 {
2748 mid = (lo + hi) >> 1;
2749 if (syms[mid]->value + syms[mid]->section->vma < value)
2750 lo = mid + 1;
2751 else if (syms[mid]->value + syms[mid]->section->vma > value)
2752 hi = mid;
2753 else
2754 return syms[mid];
2755 }
2756 }
2757 else
2758 {
2759 while (lo < hi)
2760 {
2761 mid = (lo + hi) >> 1;
2762 if (syms[mid]->section->id < id)
2763 lo = mid + 1;
2764 else if (syms[mid]->section->id > id)
2765 hi = mid;
2766 else if (syms[mid]->value < value)
2767 lo = mid + 1;
2768 else if (syms[mid]->value > value)
2769 hi = mid;
2770 else
2771 return syms[mid];
2772 }
2773 }
2774 return NULL;
2775 }
2776
2777 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2778 entry syms. */
2779
2780 static long
2781 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2782 long static_count, asymbol **static_syms,
2783 long dyn_count, asymbol **dyn_syms,
2784 asymbol **ret)
2785 {
2786 asymbol *s;
2787 long i;
2788 long count;
2789 char *names;
2790 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2791 asection *opd;
2792 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2793 asymbol **syms;
2794
2795 *ret = NULL;
2796
2797 opd = bfd_get_section_by_name (abfd, ".opd");
2798 if (opd == NULL)
2799 return 0;
2800
2801 symcount = static_count;
2802 if (!relocatable)
2803 symcount += dyn_count;
2804 if (symcount == 0)
2805 return 0;
2806
2807 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2808 if (syms == NULL)
2809 return -1;
2810
2811 if (!relocatable && static_count != 0 && dyn_count != 0)
2812 {
2813 /* Use both symbol tables. */
2814 memcpy (syms, static_syms, static_count * sizeof (*syms));
2815 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2816 }
2817 else if (!relocatable && static_count == 0)
2818 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2819 else
2820 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2821
2822 synthetic_opd = opd;
2823 synthetic_relocatable = relocatable;
2824 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2825
2826 if (!relocatable && symcount > 1)
2827 {
2828 long j;
2829 /* Trim duplicate syms, since we may have merged the normal and
2830 dynamic symbols. Actually, we only care about syms that have
2831 different values, so trim any with the same value. */
2832 for (i = 1, j = 1; i < symcount; ++i)
2833 if (syms[i - 1]->value + syms[i - 1]->section->vma
2834 != syms[i]->value + syms[i]->section->vma)
2835 syms[j++] = syms[i];
2836 symcount = j;
2837 }
2838
2839 i = 0;
2840 if (syms[i]->section == opd)
2841 ++i;
2842 codesecsym = i;
2843
2844 for (; i < symcount; ++i)
2845 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2846 != (SEC_CODE | SEC_ALLOC))
2847 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2848 break;
2849 codesecsymend = i;
2850
2851 for (; i < symcount; ++i)
2852 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2853 break;
2854 secsymend = i;
2855
2856 for (; i < symcount; ++i)
2857 if (syms[i]->section != opd)
2858 break;
2859 opdsymend = i;
2860
2861 for (; i < symcount; ++i)
2862 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2863 != (SEC_CODE | SEC_ALLOC))
2864 break;
2865 symcount = i;
2866
2867 count = 0;
2868 if (opdsymend == secsymend)
2869 goto done;
2870
2871 if (relocatable)
2872 {
2873 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2874 arelent *r;
2875 size_t size;
2876 long relcount;
2877
2878 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2879 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2880 if (relcount == 0)
2881 goto done;
2882
2883 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2884 {
2885 count = -1;
2886 goto done;
2887 }
2888
2889 size = 0;
2890 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2891 {
2892 asymbol *sym;
2893
2894 while (r < opd->relocation + relcount
2895 && r->address < syms[i]->value + opd->vma)
2896 ++r;
2897
2898 if (r == opd->relocation + relcount)
2899 break;
2900
2901 if (r->address != syms[i]->value + opd->vma)
2902 continue;
2903
2904 if (r->howto->type != R_PPC64_ADDR64)
2905 continue;
2906
2907 sym = *r->sym_ptr_ptr;
2908 if (!sym_exists_at (syms, opdsymend, symcount,
2909 sym->section->id, sym->value + r->addend))
2910 {
2911 ++count;
2912 size += sizeof (asymbol);
2913 size += strlen (syms[i]->name) + 2;
2914 }
2915 }
2916
2917 s = *ret = bfd_malloc (size);
2918 if (s == NULL)
2919 {
2920 count = -1;
2921 goto done;
2922 }
2923
2924 names = (char *) (s + count);
2925
2926 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2927 {
2928 asymbol *sym;
2929
2930 while (r < opd->relocation + relcount
2931 && r->address < syms[i]->value + opd->vma)
2932 ++r;
2933
2934 if (r == opd->relocation + relcount)
2935 break;
2936
2937 if (r->address != syms[i]->value + opd->vma)
2938 continue;
2939
2940 if (r->howto->type != R_PPC64_ADDR64)
2941 continue;
2942
2943 sym = *r->sym_ptr_ptr;
2944 if (!sym_exists_at (syms, opdsymend, symcount,
2945 sym->section->id, sym->value + r->addend))
2946 {
2947 size_t len;
2948
2949 *s = *syms[i];
2950 s->section = sym->section;
2951 s->value = sym->value + r->addend;
2952 s->name = names;
2953 *names++ = '.';
2954 len = strlen (syms[i]->name);
2955 memcpy (names, syms[i]->name, len + 1);
2956 names += len + 1;
2957 s++;
2958 }
2959 }
2960 }
2961 else
2962 {
2963 bfd_byte *contents;
2964 size_t size;
2965
2966 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2967 {
2968 if (contents)
2969 {
2970 free_contents_and_exit:
2971 free (contents);
2972 }
2973 count = -1;
2974 goto done;
2975 }
2976
2977 size = 0;
2978 for (i = secsymend; i < opdsymend; ++i)
2979 {
2980 bfd_vma ent;
2981
2982 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2983 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2984 {
2985 ++count;
2986 size += sizeof (asymbol);
2987 size += strlen (syms[i]->name) + 2;
2988 }
2989 }
2990
2991 s = *ret = bfd_malloc (size);
2992 if (s == NULL)
2993 goto free_contents_and_exit;
2994
2995 names = (char *) (s + count);
2996
2997 for (i = secsymend; i < opdsymend; ++i)
2998 {
2999 bfd_vma ent;
3000
3001 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3002 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3003 {
3004 long lo, hi;
3005 size_t len;
3006 asection *sec = abfd->sections;
3007
3008 *s = *syms[i];
3009 lo = codesecsym;
3010 hi = codesecsymend;
3011 while (lo < hi)
3012 {
3013 long mid = (lo + hi) >> 1;
3014 if (syms[mid]->section->vma < ent)
3015 lo = mid + 1;
3016 else if (syms[mid]->section->vma > ent)
3017 hi = mid;
3018 else
3019 {
3020 sec = syms[mid]->section;
3021 break;
3022 }
3023 }
3024
3025 if (lo >= hi && lo > codesecsym)
3026 sec = syms[lo - 1]->section;
3027
3028 for (; sec != NULL; sec = sec->next)
3029 {
3030 if (sec->vma > ent)
3031 break;
3032 if ((sec->flags & SEC_ALLOC) == 0
3033 || (sec->flags & SEC_LOAD) == 0)
3034 break;
3035 if ((sec->flags & SEC_CODE) != 0)
3036 s->section = sec;
3037 }
3038 s->value = ent - s->section->vma;
3039 s->name = names;
3040 *names++ = '.';
3041 len = strlen (syms[i]->name);
3042 memcpy (names, syms[i]->name, len + 1);
3043 names += len + 1;
3044 s++;
3045 }
3046 }
3047 free (contents);
3048 }
3049
3050 done:
3051 free (syms);
3052 return count;
3053 }
3054 \f
3055 /* The following functions are specific to the ELF linker, while
3056 functions above are used generally. Those named ppc64_elf_* are
3057 called by the main ELF linker code. They appear in this file more
3058 or less in the order in which they are called. eg.
3059 ppc64_elf_check_relocs is called early in the link process,
3060 ppc64_elf_finish_dynamic_sections is one of the last functions
3061 called.
3062
3063 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3064 functions have both a function code symbol and a function descriptor
3065 symbol. A call to foo in a relocatable object file looks like:
3066
3067 . .text
3068 . x:
3069 . bl .foo
3070 . nop
3071
3072 The function definition in another object file might be:
3073
3074 . .section .opd
3075 . foo: .quad .foo
3076 . .quad .TOC.@tocbase
3077 . .quad 0
3078 .
3079 . .text
3080 . .foo: blr
3081
3082 When the linker resolves the call during a static link, the branch
3083 unsurprisingly just goes to .foo and the .opd information is unused.
3084 If the function definition is in a shared library, things are a little
3085 different: The call goes via a plt call stub, the opd information gets
3086 copied to the plt, and the linker patches the nop.
3087
3088 . x:
3089 . bl .foo_stub
3090 . ld 2,40(1)
3091 .
3092 .
3093 . .foo_stub:
3094 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3095 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3096 . std 2,40(1) # this is the general idea
3097 . ld 11,0(12)
3098 . ld 2,8(12)
3099 . mtctr 11
3100 . ld 11,16(12)
3101 . bctr
3102 .
3103 . .section .plt
3104 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3105
3106 The "reloc ()" notation is supposed to indicate that the linker emits
3107 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3108 copying.
3109
3110 What are the difficulties here? Well, firstly, the relocations
3111 examined by the linker in check_relocs are against the function code
3112 sym .foo, while the dynamic relocation in the plt is emitted against
3113 the function descriptor symbol, foo. Somewhere along the line, we need
3114 to carefully copy dynamic link information from one symbol to the other.
3115 Secondly, the generic part of the elf linker will make .foo a dynamic
3116 symbol as is normal for most other backends. We need foo dynamic
3117 instead, at least for an application final link. However, when
3118 creating a shared library containing foo, we need to have both symbols
3119 dynamic so that references to .foo are satisfied during the early
3120 stages of linking. Otherwise the linker might decide to pull in a
3121 definition from some other object, eg. a static library.
3122
3123 Update: As of August 2004, we support a new convention. Function
3124 calls may use the function descriptor symbol, ie. "bl foo". This
3125 behaves exactly as "bl .foo". */
3126
3127 /* The linker needs to keep track of the number of relocs that it
3128 decides to copy as dynamic relocs in check_relocs for each symbol.
3129 This is so that it can later discard them if they are found to be
3130 unnecessary. We store the information in a field extending the
3131 regular ELF linker hash table. */
3132
3133 struct ppc_dyn_relocs
3134 {
3135 struct ppc_dyn_relocs *next;
3136
3137 /* The input section of the reloc. */
3138 asection *sec;
3139
3140 /* Total number of relocs copied for the input section. */
3141 bfd_size_type count;
3142
3143 /* Number of pc-relative relocs copied for the input section. */
3144 bfd_size_type pc_count;
3145 };
3146
3147 /* Track GOT entries needed for a given symbol. We might need more
3148 than one got entry per symbol. */
3149 struct got_entry
3150 {
3151 struct got_entry *next;
3152
3153 /* The symbol addend that we'll be placing in the GOT. */
3154 bfd_vma addend;
3155
3156 /* Unlike other ELF targets, we use separate GOT entries for the same
3157 symbol referenced from different input files. This is to support
3158 automatic multiple TOC/GOT sections, where the TOC base can vary
3159 from one input file to another.
3160
3161 Point to the BFD owning this GOT entry. */
3162 bfd *owner;
3163
3164 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3165 TLS_TPREL or TLS_DTPREL for tls entries. */
3166 char tls_type;
3167
3168 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3169 union
3170 {
3171 bfd_signed_vma refcount;
3172 bfd_vma offset;
3173 } got;
3174 };
3175
3176 /* The same for PLT. */
3177 struct plt_entry
3178 {
3179 struct plt_entry *next;
3180
3181 bfd_vma addend;
3182
3183 union
3184 {
3185 bfd_signed_vma refcount;
3186 bfd_vma offset;
3187 } plt;
3188 };
3189
3190 /* Of those relocs that might be copied as dynamic relocs, this macro
3191 selects those that must be copied when linking a shared library,
3192 even when the symbol is local. */
3193
3194 #define MUST_BE_DYN_RELOC(RTYPE) \
3195 ((RTYPE) != R_PPC64_REL32 \
3196 && (RTYPE) != R_PPC64_REL64 \
3197 && (RTYPE) != R_PPC64_REL30)
3198
3199 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3200 copying dynamic variables from a shared lib into an app's dynbss
3201 section, and instead use a dynamic relocation to point into the
3202 shared lib. With code that gcc generates, it's vital that this be
3203 enabled; In the PowerPC64 ABI, the address of a function is actually
3204 the address of a function descriptor, which resides in the .opd
3205 section. gcc uses the descriptor directly rather than going via the
3206 GOT as some other ABI's do, which means that initialized function
3207 pointers must reference the descriptor. Thus, a function pointer
3208 initialized to the address of a function in a shared library will
3209 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3210 redefines the function descriptor symbol to point to the copy. This
3211 presents a problem as a plt entry for that function is also
3212 initialized from the function descriptor symbol and the copy reloc
3213 may not be initialized first. */
3214 #define ELIMINATE_COPY_RELOCS 1
3215
3216 /* Section name for stubs is the associated section name plus this
3217 string. */
3218 #define STUB_SUFFIX ".stub"
3219
3220 /* Linker stubs.
3221 ppc_stub_long_branch:
3222 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3223 destination, but a 24 bit branch in a stub section will reach.
3224 . b dest
3225
3226 ppc_stub_plt_branch:
3227 Similar to the above, but a 24 bit branch in the stub section won't
3228 reach its destination.
3229 . addis %r12,%r2,xxx@toc@ha
3230 . ld %r11,xxx@toc@l(%r12)
3231 . mtctr %r11
3232 . bctr
3233
3234 ppc_stub_plt_call:
3235 Used to call a function in a shared library. If it so happens that
3236 the plt entry referenced crosses a 64k boundary, then an extra
3237 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3238 xxx+16 as appropriate.
3239 . addis %r12,%r2,xxx@toc@ha
3240 . std %r2,40(%r1)
3241 . ld %r11,xxx+0@toc@l(%r12)
3242 . ld %r2,xxx+8@toc@l(%r12)
3243 . mtctr %r11
3244 . ld %r11,xxx+16@toc@l(%r12)
3245 . bctr
3246
3247 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3248 code to adjust the value and save r2 to support multiple toc sections.
3249 A ppc_stub_long_branch with an r2 offset looks like:
3250 . std %r2,40(%r1)
3251 . addis %r2,%r2,off@ha
3252 . addi %r2,%r2,off@l
3253 . b dest
3254
3255 A ppc_stub_plt_branch with an r2 offset looks like:
3256 . std %r2,40(%r1)
3257 . addis %r12,%r2,xxx@toc@ha
3258 . ld %r11,xxx@toc@l(%r12)
3259 . addis %r2,%r2,off@ha
3260 . addi %r2,%r2,off@l
3261 . mtctr %r11
3262 . bctr
3263 */
3264
3265 enum ppc_stub_type {
3266 ppc_stub_none,
3267 ppc_stub_long_branch,
3268 ppc_stub_long_branch_r2off,
3269 ppc_stub_plt_branch,
3270 ppc_stub_plt_branch_r2off,
3271 ppc_stub_plt_call
3272 };
3273
3274 struct ppc_stub_hash_entry {
3275
3276 /* Base hash table entry structure. */
3277 struct bfd_hash_entry root;
3278
3279 enum ppc_stub_type stub_type;
3280
3281 /* The stub section. */
3282 asection *stub_sec;
3283
3284 /* Offset within stub_sec of the beginning of this stub. */
3285 bfd_vma stub_offset;
3286
3287 /* Given the symbol's value and its section we can determine its final
3288 value when building the stubs (so the stub knows where to jump. */
3289 bfd_vma target_value;
3290 asection *target_section;
3291
3292 /* The symbol table entry, if any, that this was derived from. */
3293 struct ppc_link_hash_entry *h;
3294
3295 /* And the reloc addend that this was derived from. */
3296 bfd_vma addend;
3297
3298 /* Where this stub is being called from, or, in the case of combined
3299 stub sections, the first input section in the group. */
3300 asection *id_sec;
3301 };
3302
3303 struct ppc_branch_hash_entry {
3304
3305 /* Base hash table entry structure. */
3306 struct bfd_hash_entry root;
3307
3308 /* Offset within branch lookup table. */
3309 unsigned int offset;
3310
3311 /* Generation marker. */
3312 unsigned int iter;
3313 };
3314
3315 struct ppc_link_hash_entry
3316 {
3317 struct elf_link_hash_entry elf;
3318
3319 union {
3320 /* A pointer to the most recently used stub hash entry against this
3321 symbol. */
3322 struct ppc_stub_hash_entry *stub_cache;
3323
3324 /* A pointer to the next symbol starting with a '.' */
3325 struct ppc_link_hash_entry *next_dot_sym;
3326 } u;
3327
3328 /* Track dynamic relocs copied for this symbol. */
3329 struct ppc_dyn_relocs *dyn_relocs;
3330
3331 /* Link between function code and descriptor symbols. */
3332 struct ppc_link_hash_entry *oh;
3333
3334 /* Flag function code and descriptor symbols. */
3335 unsigned int is_func:1;
3336 unsigned int is_func_descriptor:1;
3337 unsigned int fake:1;
3338
3339 /* Whether global opd/toc sym has been adjusted or not.
3340 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3341 should be set for all globals defined in any opd/toc section. */
3342 unsigned int adjust_done:1;
3343
3344 /* Set if we twiddled this symbol to weak at some stage. */
3345 unsigned int was_undefined:1;
3346
3347 /* Contexts in which symbol is used in the GOT (or TOC).
3348 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3349 corresponding relocs are encountered during check_relocs.
3350 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3351 indicate the corresponding GOT entry type is not needed.
3352 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3353 a TPREL one. We use a separate flag rather than setting TPREL
3354 just for convenience in distinguishing the two cases. */
3355 #define TLS_GD 1 /* GD reloc. */
3356 #define TLS_LD 2 /* LD reloc. */
3357 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3358 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3359 #define TLS_TLS 16 /* Any TLS reloc. */
3360 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3361 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3362 char tls_mask;
3363 };
3364
3365 /* ppc64 ELF linker hash table. */
3366
3367 struct ppc_link_hash_table
3368 {
3369 struct elf_link_hash_table elf;
3370
3371 /* The stub hash table. */
3372 struct bfd_hash_table stub_hash_table;
3373
3374 /* Another hash table for plt_branch stubs. */
3375 struct bfd_hash_table branch_hash_table;
3376
3377 /* Linker stub bfd. */
3378 bfd *stub_bfd;
3379
3380 /* Linker call-backs. */
3381 asection * (*add_stub_section) (const char *, asection *);
3382 void (*layout_sections_again) (void);
3383
3384 /* Array to keep track of which stub sections have been created, and
3385 information on stub grouping. */
3386 struct map_stub {
3387 /* This is the section to which stubs in the group will be attached. */
3388 asection *link_sec;
3389 /* The stub section. */
3390 asection *stub_sec;
3391 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3392 bfd_vma toc_off;
3393 } *stub_group;
3394
3395 /* Temp used when calculating TOC pointers. */
3396 bfd_vma toc_curr;
3397
3398 /* Highest input section id. */
3399 int top_id;
3400
3401 /* Highest output section index. */
3402 int top_index;
3403
3404 /* Used when adding symbols. */
3405 struct ppc_link_hash_entry *dot_syms;
3406
3407 /* List of input sections for each output section. */
3408 asection **input_list;
3409
3410 /* Short-cuts to get to dynamic linker sections. */
3411 asection *got;
3412 asection *plt;
3413 asection *relplt;
3414 asection *dynbss;
3415 asection *relbss;
3416 asection *glink;
3417 asection *sfpr;
3418 asection *brlt;
3419 asection *relbrlt;
3420
3421 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3422 struct ppc_link_hash_entry *tls_get_addr;
3423 struct ppc_link_hash_entry *tls_get_addr_fd;
3424
3425 /* Statistics. */
3426 unsigned long stub_count[ppc_stub_plt_call];
3427
3428 /* Number of stubs against global syms. */
3429 unsigned long stub_globals;
3430
3431 /* Set if we should emit symbols for stubs. */
3432 unsigned int emit_stub_syms:1;
3433
3434 /* Support for multiple toc sections. */
3435 unsigned int no_multi_toc:1;
3436 unsigned int multi_toc_needed:1;
3437
3438 /* Set on error. */
3439 unsigned int stub_error:1;
3440
3441 /* Temp used by ppc64_elf_check_directives. */
3442 unsigned int twiddled_syms:1;
3443
3444 /* Incremented every time we size stubs. */
3445 unsigned int stub_iteration;
3446
3447 /* Small local sym to section mapping cache. */
3448 struct sym_sec_cache sym_sec;
3449 };
3450
3451 /* Rename some of the generic section flags to better document how they
3452 are used here. */
3453 #define has_toc_reloc has_gp_reloc
3454 #define makes_toc_func_call need_finalize_relax
3455 #define call_check_in_progress reloc_done
3456
3457 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3458
3459 #define ppc_hash_table(p) \
3460 ((struct ppc_link_hash_table *) ((p)->hash))
3461
3462 #define ppc_stub_hash_lookup(table, string, create, copy) \
3463 ((struct ppc_stub_hash_entry *) \
3464 bfd_hash_lookup ((table), (string), (create), (copy)))
3465
3466 #define ppc_branch_hash_lookup(table, string, create, copy) \
3467 ((struct ppc_branch_hash_entry *) \
3468 bfd_hash_lookup ((table), (string), (create), (copy)))
3469
3470 /* Create an entry in the stub hash table. */
3471
3472 static struct bfd_hash_entry *
3473 stub_hash_newfunc (struct bfd_hash_entry *entry,
3474 struct bfd_hash_table *table,
3475 const char *string)
3476 {
3477 /* Allocate the structure if it has not already been allocated by a
3478 subclass. */
3479 if (entry == NULL)
3480 {
3481 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3482 if (entry == NULL)
3483 return entry;
3484 }
3485
3486 /* Call the allocation method of the superclass. */
3487 entry = bfd_hash_newfunc (entry, table, string);
3488 if (entry != NULL)
3489 {
3490 struct ppc_stub_hash_entry *eh;
3491
3492 /* Initialize the local fields. */
3493 eh = (struct ppc_stub_hash_entry *) entry;
3494 eh->stub_type = ppc_stub_none;
3495 eh->stub_sec = NULL;
3496 eh->stub_offset = 0;
3497 eh->target_value = 0;
3498 eh->target_section = NULL;
3499 eh->h = NULL;
3500 eh->id_sec = NULL;
3501 }
3502
3503 return entry;
3504 }
3505
3506 /* Create an entry in the branch hash table. */
3507
3508 static struct bfd_hash_entry *
3509 branch_hash_newfunc (struct bfd_hash_entry *entry,
3510 struct bfd_hash_table *table,
3511 const char *string)
3512 {
3513 /* Allocate the structure if it has not already been allocated by a
3514 subclass. */
3515 if (entry == NULL)
3516 {
3517 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3518 if (entry == NULL)
3519 return entry;
3520 }
3521
3522 /* Call the allocation method of the superclass. */
3523 entry = bfd_hash_newfunc (entry, table, string);
3524 if (entry != NULL)
3525 {
3526 struct ppc_branch_hash_entry *eh;
3527
3528 /* Initialize the local fields. */
3529 eh = (struct ppc_branch_hash_entry *) entry;
3530 eh->offset = 0;
3531 eh->iter = 0;
3532 }
3533
3534 return entry;
3535 }
3536
3537 /* Create an entry in a ppc64 ELF linker hash table. */
3538
3539 static struct bfd_hash_entry *
3540 link_hash_newfunc (struct bfd_hash_entry *entry,
3541 struct bfd_hash_table *table,
3542 const char *string)
3543 {
3544 /* Allocate the structure if it has not already been allocated by a
3545 subclass. */
3546 if (entry == NULL)
3547 {
3548 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3549 if (entry == NULL)
3550 return entry;
3551 }
3552
3553 /* Call the allocation method of the superclass. */
3554 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3555 if (entry != NULL)
3556 {
3557 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3558
3559 memset (&eh->u.stub_cache, 0,
3560 (sizeof (struct ppc_link_hash_entry)
3561 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3562
3563 /* When making function calls, old ABI code references function entry
3564 points (dot symbols), while new ABI code references the function
3565 descriptor symbol. We need to make any combination of reference and
3566 definition work together, without breaking archive linking.
3567
3568 For a defined function "foo" and an undefined call to "bar":
3569 An old object defines "foo" and ".foo", references ".bar" (possibly
3570 "bar" too).
3571 A new object defines "foo" and references "bar".
3572
3573 A new object thus has no problem with its undefined symbols being
3574 satisfied by definitions in an old object. On the other hand, the
3575 old object won't have ".bar" satisfied by a new object.
3576
3577 Keep a list of newly added dot-symbols. */
3578
3579 if (string[0] == '.')
3580 {
3581 struct ppc_link_hash_table *htab;
3582
3583 htab = (struct ppc_link_hash_table *) table;
3584 eh->u.next_dot_sym = htab->dot_syms;
3585 htab->dot_syms = eh;
3586 }
3587 }
3588
3589 return entry;
3590 }
3591
3592 /* Create a ppc64 ELF linker hash table. */
3593
3594 static struct bfd_link_hash_table *
3595 ppc64_elf_link_hash_table_create (bfd *abfd)
3596 {
3597 struct ppc_link_hash_table *htab;
3598 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3599
3600 htab = bfd_zmalloc (amt);
3601 if (htab == NULL)
3602 return NULL;
3603
3604 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3605 sizeof (struct ppc_link_hash_entry)))
3606 {
3607 free (htab);
3608 return NULL;
3609 }
3610
3611 /* Init the stub hash table too. */
3612 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3613 sizeof (struct ppc_stub_hash_entry)))
3614 return NULL;
3615
3616 /* And the branch hash table. */
3617 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3618 sizeof (struct ppc_branch_hash_entry)))
3619 return NULL;
3620
3621 /* Initializing two fields of the union is just cosmetic. We really
3622 only care about glist, but when compiled on a 32-bit host the
3623 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3624 debugger inspection of these fields look nicer. */
3625 htab->elf.init_got_refcount.refcount = 0;
3626 htab->elf.init_got_refcount.glist = NULL;
3627 htab->elf.init_plt_refcount.refcount = 0;
3628 htab->elf.init_plt_refcount.glist = NULL;
3629 htab->elf.init_got_offset.offset = 0;
3630 htab->elf.init_got_offset.glist = NULL;
3631 htab->elf.init_plt_offset.offset = 0;
3632 htab->elf.init_plt_offset.glist = NULL;
3633
3634 return &htab->elf.root;
3635 }
3636
3637 /* Free the derived linker hash table. */
3638
3639 static void
3640 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3641 {
3642 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3643
3644 bfd_hash_table_free (&ret->stub_hash_table);
3645 bfd_hash_table_free (&ret->branch_hash_table);
3646 _bfd_generic_link_hash_table_free (hash);
3647 }
3648
3649 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3650
3651 void
3652 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3653 {
3654 struct ppc_link_hash_table *htab;
3655
3656 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3657
3658 /* Always hook our dynamic sections into the first bfd, which is the
3659 linker created stub bfd. This ensures that the GOT header is at
3660 the start of the output TOC section. */
3661 htab = ppc_hash_table (info);
3662 htab->stub_bfd = abfd;
3663 htab->elf.dynobj = abfd;
3664 }
3665
3666 /* Build a name for an entry in the stub hash table. */
3667
3668 static char *
3669 ppc_stub_name (const asection *input_section,
3670 const asection *sym_sec,
3671 const struct ppc_link_hash_entry *h,
3672 const Elf_Internal_Rela *rel)
3673 {
3674 char *stub_name;
3675 bfd_size_type len;
3676
3677 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3678 offsets from a sym as a branch target? In fact, we could
3679 probably assume the addend is always zero. */
3680 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3681
3682 if (h)
3683 {
3684 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3685 stub_name = bfd_malloc (len);
3686 if (stub_name == NULL)
3687 return stub_name;
3688
3689 sprintf (stub_name, "%08x.%s+%x",
3690 input_section->id & 0xffffffff,
3691 h->elf.root.root.string,
3692 (int) rel->r_addend & 0xffffffff);
3693 }
3694 else
3695 {
3696 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3697 stub_name = bfd_malloc (len);
3698 if (stub_name == NULL)
3699 return stub_name;
3700
3701 sprintf (stub_name, "%08x.%x:%x+%x",
3702 input_section->id & 0xffffffff,
3703 sym_sec->id & 0xffffffff,
3704 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3705 (int) rel->r_addend & 0xffffffff);
3706 }
3707 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3708 stub_name[len - 2] = 0;
3709 return stub_name;
3710 }
3711
3712 /* Look up an entry in the stub hash. Stub entries are cached because
3713 creating the stub name takes a bit of time. */
3714
3715 static struct ppc_stub_hash_entry *
3716 ppc_get_stub_entry (const asection *input_section,
3717 const asection *sym_sec,
3718 struct ppc_link_hash_entry *h,
3719 const Elf_Internal_Rela *rel,
3720 struct ppc_link_hash_table *htab)
3721 {
3722 struct ppc_stub_hash_entry *stub_entry;
3723 const asection *id_sec;
3724
3725 /* If this input section is part of a group of sections sharing one
3726 stub section, then use the id of the first section in the group.
3727 Stub names need to include a section id, as there may well be
3728 more than one stub used to reach say, printf, and we need to
3729 distinguish between them. */
3730 id_sec = htab->stub_group[input_section->id].link_sec;
3731
3732 if (h != NULL && h->u.stub_cache != NULL
3733 && h->u.stub_cache->h == h
3734 && h->u.stub_cache->id_sec == id_sec)
3735 {
3736 stub_entry = h->u.stub_cache;
3737 }
3738 else
3739 {
3740 char *stub_name;
3741
3742 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3743 if (stub_name == NULL)
3744 return NULL;
3745
3746 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3747 stub_name, FALSE, FALSE);
3748 if (h != NULL)
3749 h->u.stub_cache = stub_entry;
3750
3751 free (stub_name);
3752 }
3753
3754 return stub_entry;
3755 }
3756
3757 /* Add a new stub entry to the stub hash. Not all fields of the new
3758 stub entry are initialised. */
3759
3760 static struct ppc_stub_hash_entry *
3761 ppc_add_stub (const char *stub_name,
3762 asection *section,
3763 struct ppc_link_hash_table *htab)
3764 {
3765 asection *link_sec;
3766 asection *stub_sec;
3767 struct ppc_stub_hash_entry *stub_entry;
3768
3769 link_sec = htab->stub_group[section->id].link_sec;
3770 stub_sec = htab->stub_group[section->id].stub_sec;
3771 if (stub_sec == NULL)
3772 {
3773 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3774 if (stub_sec == NULL)
3775 {
3776 size_t namelen;
3777 bfd_size_type len;
3778 char *s_name;
3779
3780 namelen = strlen (link_sec->name);
3781 len = namelen + sizeof (STUB_SUFFIX);
3782 s_name = bfd_alloc (htab->stub_bfd, len);
3783 if (s_name == NULL)
3784 return NULL;
3785
3786 memcpy (s_name, link_sec->name, namelen);
3787 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3788 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3789 if (stub_sec == NULL)
3790 return NULL;
3791 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3792 }
3793 htab->stub_group[section->id].stub_sec = stub_sec;
3794 }
3795
3796 /* Enter this entry into the linker stub hash table. */
3797 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3798 TRUE, FALSE);
3799 if (stub_entry == NULL)
3800 {
3801 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3802 section->owner, stub_name);
3803 return NULL;
3804 }
3805
3806 stub_entry->stub_sec = stub_sec;
3807 stub_entry->stub_offset = 0;
3808 stub_entry->id_sec = link_sec;
3809 return stub_entry;
3810 }
3811
3812 /* Create sections for linker generated code. */
3813
3814 static bfd_boolean
3815 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3816 {
3817 struct ppc_link_hash_table *htab;
3818 flagword flags;
3819
3820 htab = ppc_hash_table (info);
3821
3822 /* Create .sfpr for code to save and restore fp regs. */
3823 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3824 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3825 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3826 flags);
3827 if (htab->sfpr == NULL
3828 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3829 return FALSE;
3830
3831 /* Create .glink for lazy dynamic linking support. */
3832 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3833 flags);
3834 if (htab->glink == NULL
3835 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3836 return FALSE;
3837
3838 /* Create branch lookup table for plt_branch stubs. */
3839 flags = (SEC_ALLOC | SEC_LOAD
3840 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3841 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3842 flags);
3843 if (htab->brlt == NULL
3844 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3845 return FALSE;
3846
3847 if (!info->shared)
3848 return TRUE;
3849
3850 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3851 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3852 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3853 ".rela.branch_lt",
3854 flags);
3855 if (!htab->relbrlt
3856 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3857 return FALSE;
3858
3859 return TRUE;
3860 }
3861
3862 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3863 not already done. */
3864
3865 static bfd_boolean
3866 create_got_section (bfd *abfd, struct bfd_link_info *info)
3867 {
3868 asection *got, *relgot;
3869 flagword flags;
3870 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3871
3872 if (!htab->got)
3873 {
3874 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3875 return FALSE;
3876
3877 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3878 if (!htab->got)
3879 abort ();
3880 }
3881
3882 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3883 | SEC_LINKER_CREATED);
3884
3885 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3886 if (!got
3887 || !bfd_set_section_alignment (abfd, got, 3))
3888 return FALSE;
3889
3890 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3891 flags | SEC_READONLY);
3892 if (!relgot
3893 || ! bfd_set_section_alignment (abfd, relgot, 3))
3894 return FALSE;
3895
3896 ppc64_elf_tdata (abfd)->got = got;
3897 ppc64_elf_tdata (abfd)->relgot = relgot;
3898 return TRUE;
3899 }
3900
3901 /* Create the dynamic sections, and set up shortcuts. */
3902
3903 static bfd_boolean
3904 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3905 {
3906 struct ppc_link_hash_table *htab;
3907
3908 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3909 return FALSE;
3910
3911 htab = ppc_hash_table (info);
3912 if (!htab->got)
3913 htab->got = bfd_get_section_by_name (dynobj, ".got");
3914 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3915 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3916 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3917 if (!info->shared)
3918 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3919
3920 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3921 || (!info->shared && !htab->relbss))
3922 abort ();
3923
3924 return TRUE;
3925 }
3926
3927 /* Merge PLT info on FROM with that on TO. */
3928
3929 static void
3930 move_plt_plist (struct ppc_link_hash_entry *from,
3931 struct ppc_link_hash_entry *to)
3932 {
3933 if (from->elf.plt.plist != NULL)
3934 {
3935 if (to->elf.plt.plist != NULL)
3936 {
3937 struct plt_entry **entp;
3938 struct plt_entry *ent;
3939
3940 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3941 {
3942 struct plt_entry *dent;
3943
3944 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3945 if (dent->addend == ent->addend)
3946 {
3947 dent->plt.refcount += ent->plt.refcount;
3948 *entp = ent->next;
3949 break;
3950 }
3951 if (dent == NULL)
3952 entp = &ent->next;
3953 }
3954 *entp = to->elf.plt.plist;
3955 }
3956
3957 to->elf.plt.plist = from->elf.plt.plist;
3958 from->elf.plt.plist = NULL;
3959 }
3960 }
3961
3962 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3963
3964 static void
3965 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3966 struct elf_link_hash_entry *dir,
3967 struct elf_link_hash_entry *ind)
3968 {
3969 struct ppc_link_hash_entry *edir, *eind;
3970
3971 edir = (struct ppc_link_hash_entry *) dir;
3972 eind = (struct ppc_link_hash_entry *) ind;
3973
3974 /* Copy over any dynamic relocs we may have on the indirect sym. */
3975 if (eind->dyn_relocs != NULL)
3976 {
3977 if (edir->dyn_relocs != NULL)
3978 {
3979 struct ppc_dyn_relocs **pp;
3980 struct ppc_dyn_relocs *p;
3981
3982 /* Add reloc counts against the indirect sym to the direct sym
3983 list. Merge any entries against the same section. */
3984 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3985 {
3986 struct ppc_dyn_relocs *q;
3987
3988 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3989 if (q->sec == p->sec)
3990 {
3991 q->pc_count += p->pc_count;
3992 q->count += p->count;
3993 *pp = p->next;
3994 break;
3995 }
3996 if (q == NULL)
3997 pp = &p->next;
3998 }
3999 *pp = edir->dyn_relocs;
4000 }
4001
4002 edir->dyn_relocs = eind->dyn_relocs;
4003 eind->dyn_relocs = NULL;
4004 }
4005
4006 edir->is_func |= eind->is_func;
4007 edir->is_func_descriptor |= eind->is_func_descriptor;
4008 edir->tls_mask |= eind->tls_mask;
4009
4010 /* If called to transfer flags for a weakdef during processing
4011 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4012 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4013 if (!(ELIMINATE_COPY_RELOCS
4014 && eind->elf.root.type != bfd_link_hash_indirect
4015 && edir->elf.dynamic_adjusted))
4016 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4017
4018 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4019 edir->elf.ref_regular |= eind->elf.ref_regular;
4020 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4021 edir->elf.needs_plt |= eind->elf.needs_plt;
4022
4023 /* If we were called to copy over info for a weak sym, that's all. */
4024 if (eind->elf.root.type != bfd_link_hash_indirect)
4025 return;
4026
4027 /* Copy over got entries that we may have already seen to the
4028 symbol which just became indirect. */
4029 if (eind->elf.got.glist != NULL)
4030 {
4031 if (edir->elf.got.glist != NULL)
4032 {
4033 struct got_entry **entp;
4034 struct got_entry *ent;
4035
4036 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4037 {
4038 struct got_entry *dent;
4039
4040 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4041 if (dent->addend == ent->addend
4042 && dent->owner == ent->owner
4043 && dent->tls_type == ent->tls_type)
4044 {
4045 dent->got.refcount += ent->got.refcount;
4046 *entp = ent->next;
4047 break;
4048 }
4049 if (dent == NULL)
4050 entp = &ent->next;
4051 }
4052 *entp = edir->elf.got.glist;
4053 }
4054
4055 edir->elf.got.glist = eind->elf.got.glist;
4056 eind->elf.got.glist = NULL;
4057 }
4058
4059 /* And plt entries. */
4060 move_plt_plist (eind, edir);
4061
4062 if (eind->elf.dynindx != -1)
4063 {
4064 if (edir->elf.dynindx != -1)
4065 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4066 edir->elf.dynstr_index);
4067 edir->elf.dynindx = eind->elf.dynindx;
4068 edir->elf.dynstr_index = eind->elf.dynstr_index;
4069 eind->elf.dynindx = -1;
4070 eind->elf.dynstr_index = 0;
4071 }
4072 }
4073
4074 /* Find the function descriptor hash entry from the given function code
4075 hash entry FH. Link the entries via their OH fields. */
4076
4077 static struct ppc_link_hash_entry *
4078 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4079 {
4080 struct ppc_link_hash_entry *fdh = fh->oh;
4081
4082 if (fdh == NULL)
4083 {
4084 const char *fd_name = fh->elf.root.root.string + 1;
4085
4086 fdh = (struct ppc_link_hash_entry *)
4087 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4088 if (fdh != NULL)
4089 {
4090 fdh->is_func_descriptor = 1;
4091 fdh->oh = fh;
4092 fh->is_func = 1;
4093 fh->oh = fdh;
4094 }
4095 }
4096
4097 return fdh;
4098 }
4099
4100 /* Make a fake function descriptor sym for the code sym FH. */
4101
4102 static struct ppc_link_hash_entry *
4103 make_fdh (struct bfd_link_info *info,
4104 struct ppc_link_hash_entry *fh)
4105 {
4106 bfd *abfd;
4107 asymbol *newsym;
4108 struct bfd_link_hash_entry *bh;
4109 struct ppc_link_hash_entry *fdh;
4110
4111 abfd = fh->elf.root.u.undef.abfd;
4112 newsym = bfd_make_empty_symbol (abfd);
4113 newsym->name = fh->elf.root.root.string + 1;
4114 newsym->section = bfd_und_section_ptr;
4115 newsym->value = 0;
4116 newsym->flags = BSF_WEAK;
4117
4118 bh = NULL;
4119 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4120 newsym->flags, newsym->section,
4121 newsym->value, NULL, FALSE, FALSE,
4122 &bh))
4123 return NULL;
4124
4125 fdh = (struct ppc_link_hash_entry *) bh;
4126 fdh->elf.non_elf = 0;
4127 fdh->fake = 1;
4128 fdh->is_func_descriptor = 1;
4129 fdh->oh = fh;
4130 fh->is_func = 1;
4131 fh->oh = fdh;
4132 return fdh;
4133 }
4134
4135 /* Fix function descriptor symbols defined in .opd sections to be
4136 function type. */
4137
4138 static bfd_boolean
4139 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4140 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4141 Elf_Internal_Sym *isym,
4142 const char **name ATTRIBUTE_UNUSED,
4143 flagword *flags ATTRIBUTE_UNUSED,
4144 asection **sec,
4145 bfd_vma *value ATTRIBUTE_UNUSED)
4146 {
4147 if (*sec != NULL
4148 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4149 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4150
4151 return TRUE;
4152 }
4153
4154 /* This function makes an old ABI object reference to ".bar" cause the
4155 inclusion of a new ABI object archive that defines "bar".
4156 NAME is a symbol defined in an archive. Return a symbol in the hash
4157 table that might be satisfied by the archive symbols. */
4158
4159 static struct elf_link_hash_entry *
4160 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4161 struct bfd_link_info *info,
4162 const char *name)
4163 {
4164 struct elf_link_hash_entry *h;
4165 char *dot_name;
4166 size_t len;
4167
4168 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4169 if (h != NULL
4170 /* Don't return this sym if it is a fake function descriptor
4171 created by add_symbol_adjust. */
4172 && !(h->root.type == bfd_link_hash_undefweak
4173 && ((struct ppc_link_hash_entry *) h)->fake))
4174 return h;
4175
4176 if (name[0] == '.')
4177 return h;
4178
4179 len = strlen (name);
4180 dot_name = bfd_alloc (abfd, len + 2);
4181 if (dot_name == NULL)
4182 return (struct elf_link_hash_entry *) 0 - 1;
4183 dot_name[0] = '.';
4184 memcpy (dot_name + 1, name, len + 1);
4185 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4186 bfd_release (abfd, dot_name);
4187 return h;
4188 }
4189
4190 /* This function satisfies all old ABI object references to ".bar" if a
4191 new ABI object defines "bar". Well, at least, undefined dot symbols
4192 are made weak. This stops later archive searches from including an
4193 object if we already have a function descriptor definition. It also
4194 prevents the linker complaining about undefined symbols.
4195 We also check and correct mismatched symbol visibility here. The
4196 most restrictive visibility of the function descriptor and the
4197 function entry symbol is used. */
4198
4199 static bfd_boolean
4200 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4201 {
4202 struct ppc_link_hash_table *htab;
4203 struct ppc_link_hash_entry *fdh;
4204
4205 if (eh->elf.root.type == bfd_link_hash_indirect)
4206 return TRUE;
4207
4208 if (eh->elf.root.type == bfd_link_hash_warning)
4209 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4210
4211 if (eh->elf.root.root.string[0] != '.')
4212 abort ();
4213
4214 htab = ppc_hash_table (info);
4215 fdh = get_fdh (eh, htab);
4216 if (fdh == NULL
4217 && !info->relocatable
4218 && (eh->elf.root.type == bfd_link_hash_undefined
4219 || eh->elf.root.type == bfd_link_hash_undefweak)
4220 && eh->elf.ref_regular)
4221 {
4222 /* Make an undefweak function descriptor sym, which is enough to
4223 pull in an --as-needed shared lib, but won't cause link
4224 errors. Archives are handled elsewhere. */
4225 fdh = make_fdh (info, eh);
4226 if (fdh == NULL)
4227 return FALSE;
4228 else
4229 fdh->elf.ref_regular = 1;
4230 }
4231 else if (fdh != NULL)
4232 {
4233 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4234 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4235 if (entry_vis < descr_vis)
4236 fdh->elf.other += entry_vis - descr_vis;
4237 else if (entry_vis > descr_vis)
4238 eh->elf.other += descr_vis - entry_vis;
4239
4240 if ((fdh->elf.root.type == bfd_link_hash_defined
4241 || fdh->elf.root.type == bfd_link_hash_defweak)
4242 && eh->elf.root.type == bfd_link_hash_undefined)
4243 {
4244 eh->elf.root.type = bfd_link_hash_undefweak;
4245 eh->was_undefined = 1;
4246 htab->twiddled_syms = 1;
4247 }
4248 }
4249
4250 return TRUE;
4251 }
4252
4253 /* Process list of dot-symbols we made in link_hash_newfunc. */
4254
4255 static bfd_boolean
4256 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4257 {
4258 struct ppc_link_hash_table *htab;
4259 struct ppc_link_hash_entry **p, *eh;
4260
4261 htab = ppc_hash_table (info);
4262 if (!is_ppc64_elf_target (htab->elf.root.creator))
4263 return TRUE;
4264
4265 if (is_ppc64_elf_target (ibfd->xvec))
4266 {
4267 p = &htab->dot_syms;
4268 while ((eh = *p) != NULL)
4269 {
4270 *p = NULL;
4271 if (!add_symbol_adjust (eh, info))
4272 return FALSE;
4273 p = &eh->u.next_dot_sym;
4274 }
4275 }
4276
4277 /* Clear the list for non-ppc64 input files. */
4278 p = &htab->dot_syms;
4279 while ((eh = *p) != NULL)
4280 {
4281 *p = NULL;
4282 p = &eh->u.next_dot_sym;
4283 }
4284
4285 /* We need to fix the undefs list for any syms we have twiddled to
4286 undef_weak. */
4287 if (htab->twiddled_syms)
4288 {
4289 bfd_link_repair_undef_list (&htab->elf.root);
4290 htab->twiddled_syms = 0;
4291 }
4292 return TRUE;
4293 }
4294
4295 /* Undo hash table changes when an --as-needed input file is determined
4296 not to be needed. */
4297
4298 static bfd_boolean
4299 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4300 struct bfd_link_info *info)
4301 {
4302 ppc_hash_table (info)->dot_syms = NULL;
4303 return TRUE;
4304 }
4305
4306 static bfd_boolean
4307 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4308 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4309 {
4310 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4311 char *local_got_tls_masks;
4312
4313 if (local_got_ents == NULL)
4314 {
4315 bfd_size_type size = symtab_hdr->sh_info;
4316
4317 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4318 local_got_ents = bfd_zalloc (abfd, size);
4319 if (local_got_ents == NULL)
4320 return FALSE;
4321 elf_local_got_ents (abfd) = local_got_ents;
4322 }
4323
4324 if ((tls_type & TLS_EXPLICIT) == 0)
4325 {
4326 struct got_entry *ent;
4327
4328 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4329 if (ent->addend == r_addend
4330 && ent->owner == abfd
4331 && ent->tls_type == tls_type)
4332 break;
4333 if (ent == NULL)
4334 {
4335 bfd_size_type amt = sizeof (*ent);
4336 ent = bfd_alloc (abfd, amt);
4337 if (ent == NULL)
4338 return FALSE;
4339 ent->next = local_got_ents[r_symndx];
4340 ent->addend = r_addend;
4341 ent->owner = abfd;
4342 ent->tls_type = tls_type;
4343 ent->got.refcount = 0;
4344 local_got_ents[r_symndx] = ent;
4345 }
4346 ent->got.refcount += 1;
4347 }
4348
4349 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4350 local_got_tls_masks[r_symndx] |= tls_type;
4351 return TRUE;
4352 }
4353
4354 static bfd_boolean
4355 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4356 {
4357 struct plt_entry *ent;
4358
4359 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4360 if (ent->addend == addend)
4361 break;
4362 if (ent == NULL)
4363 {
4364 bfd_size_type amt = sizeof (*ent);
4365 ent = bfd_alloc (abfd, amt);
4366 if (ent == NULL)
4367 return FALSE;
4368 ent->next = eh->elf.plt.plist;
4369 ent->addend = addend;
4370 ent->plt.refcount = 0;
4371 eh->elf.plt.plist = ent;
4372 }
4373 ent->plt.refcount += 1;
4374 eh->elf.needs_plt = 1;
4375 if (eh->elf.root.root.string[0] == '.'
4376 && eh->elf.root.root.string[1] != '\0')
4377 eh->is_func = 1;
4378 return TRUE;
4379 }
4380
4381 /* Look through the relocs for a section during the first phase, and
4382 calculate needed space in the global offset table, procedure
4383 linkage table, and dynamic reloc sections. */
4384
4385 static bfd_boolean
4386 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4387 asection *sec, const Elf_Internal_Rela *relocs)
4388 {
4389 struct ppc_link_hash_table *htab;
4390 Elf_Internal_Shdr *symtab_hdr;
4391 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4392 const Elf_Internal_Rela *rel;
4393 const Elf_Internal_Rela *rel_end;
4394 asection *sreloc;
4395 asection **opd_sym_map;
4396
4397 if (info->relocatable)
4398 return TRUE;
4399
4400 /* Don't do anything special with non-loaded, non-alloced sections.
4401 In particular, any relocs in such sections should not affect GOT
4402 and PLT reference counting (ie. we don't allow them to create GOT
4403 or PLT entries), there's no possibility or desire to optimize TLS
4404 relocs, and there's not much point in propagating relocs to shared
4405 libs that the dynamic linker won't relocate. */
4406 if ((sec->flags & SEC_ALLOC) == 0)
4407 return TRUE;
4408
4409 htab = ppc_hash_table (info);
4410 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4411
4412 sym_hashes = elf_sym_hashes (abfd);
4413 sym_hashes_end = (sym_hashes
4414 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4415 - symtab_hdr->sh_info);
4416
4417 sreloc = NULL;
4418 opd_sym_map = NULL;
4419 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4420 {
4421 /* Garbage collection needs some extra help with .opd sections.
4422 We don't want to necessarily keep everything referenced by
4423 relocs in .opd, as that would keep all functions. Instead,
4424 if we reference an .opd symbol (a function descriptor), we
4425 want to keep the function code symbol's section. This is
4426 easy for global symbols, but for local syms we need to keep
4427 information about the associated function section. Later, if
4428 edit_opd deletes entries, we'll use this array to adjust
4429 local syms in .opd. */
4430 union opd_info {
4431 asection *func_section;
4432 long entry_adjust;
4433 };
4434 bfd_size_type amt;
4435
4436 amt = sec->size * sizeof (union opd_info) / 8;
4437 opd_sym_map = bfd_zalloc (abfd, amt);
4438 if (opd_sym_map == NULL)
4439 return FALSE;
4440 ppc64_elf_section_data (sec)->u.opd_func_sec = opd_sym_map;
4441 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4442 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4443 }
4444
4445 if (htab->sfpr == NULL
4446 && !create_linkage_sections (htab->elf.dynobj, info))
4447 return FALSE;
4448
4449 rel_end = relocs + sec->reloc_count;
4450 for (rel = relocs; rel < rel_end; rel++)
4451 {
4452 unsigned long r_symndx;
4453 struct elf_link_hash_entry *h;
4454 enum elf_ppc64_reloc_type r_type;
4455 int tls_type = 0;
4456 struct _ppc64_elf_section_data *ppc64_sec;
4457
4458 r_symndx = ELF64_R_SYM (rel->r_info);
4459 if (r_symndx < symtab_hdr->sh_info)
4460 h = NULL;
4461 else
4462 {
4463 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4464 while (h->root.type == bfd_link_hash_indirect
4465 || h->root.type == bfd_link_hash_warning)
4466 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4467 }
4468
4469 r_type = ELF64_R_TYPE (rel->r_info);
4470 switch (r_type)
4471 {
4472 case R_PPC64_GOT_TLSLD16:
4473 case R_PPC64_GOT_TLSLD16_LO:
4474 case R_PPC64_GOT_TLSLD16_HI:
4475 case R_PPC64_GOT_TLSLD16_HA:
4476 ppc64_tlsld_got (abfd)->refcount += 1;
4477 tls_type = TLS_TLS | TLS_LD;
4478 goto dogottls;
4479
4480 case R_PPC64_GOT_TLSGD16:
4481 case R_PPC64_GOT_TLSGD16_LO:
4482 case R_PPC64_GOT_TLSGD16_HI:
4483 case R_PPC64_GOT_TLSGD16_HA:
4484 tls_type = TLS_TLS | TLS_GD;
4485 goto dogottls;
4486
4487 case R_PPC64_GOT_TPREL16_DS:
4488 case R_PPC64_GOT_TPREL16_LO_DS:
4489 case R_PPC64_GOT_TPREL16_HI:
4490 case R_PPC64_GOT_TPREL16_HA:
4491 if (info->shared)
4492 info->flags |= DF_STATIC_TLS;
4493 tls_type = TLS_TLS | TLS_TPREL;
4494 goto dogottls;
4495
4496 case R_PPC64_GOT_DTPREL16_DS:
4497 case R_PPC64_GOT_DTPREL16_LO_DS:
4498 case R_PPC64_GOT_DTPREL16_HI:
4499 case R_PPC64_GOT_DTPREL16_HA:
4500 tls_type = TLS_TLS | TLS_DTPREL;
4501 dogottls:
4502 sec->has_tls_reloc = 1;
4503 /* Fall thru */
4504
4505 case R_PPC64_GOT16:
4506 case R_PPC64_GOT16_DS:
4507 case R_PPC64_GOT16_HA:
4508 case R_PPC64_GOT16_HI:
4509 case R_PPC64_GOT16_LO:
4510 case R_PPC64_GOT16_LO_DS:
4511 /* This symbol requires a global offset table entry. */
4512 sec->has_toc_reloc = 1;
4513 if (ppc64_elf_tdata (abfd)->got == NULL
4514 && !create_got_section (abfd, info))
4515 return FALSE;
4516
4517 if (h != NULL)
4518 {
4519 struct ppc_link_hash_entry *eh;
4520 struct got_entry *ent;
4521
4522 eh = (struct ppc_link_hash_entry *) h;
4523 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4524 if (ent->addend == rel->r_addend
4525 && ent->owner == abfd
4526 && ent->tls_type == tls_type)
4527 break;
4528 if (ent == NULL)
4529 {
4530 bfd_size_type amt = sizeof (*ent);
4531 ent = bfd_alloc (abfd, amt);
4532 if (ent == NULL)
4533 return FALSE;
4534 ent->next = eh->elf.got.glist;
4535 ent->addend = rel->r_addend;
4536 ent->owner = abfd;
4537 ent->tls_type = tls_type;
4538 ent->got.refcount = 0;
4539 eh->elf.got.glist = ent;
4540 }
4541 ent->got.refcount += 1;
4542 eh->tls_mask |= tls_type;
4543 }
4544 else
4545 /* This is a global offset table entry for a local symbol. */
4546 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4547 rel->r_addend, tls_type))
4548 return FALSE;
4549 break;
4550
4551 case R_PPC64_PLT16_HA:
4552 case R_PPC64_PLT16_HI:
4553 case R_PPC64_PLT16_LO:
4554 case R_PPC64_PLT32:
4555 case R_PPC64_PLT64:
4556 /* This symbol requires a procedure linkage table entry. We
4557 actually build the entry in adjust_dynamic_symbol,
4558 because this might be a case of linking PIC code without
4559 linking in any dynamic objects, in which case we don't
4560 need to generate a procedure linkage table after all. */
4561 if (h == NULL)
4562 {
4563 /* It does not make sense to have a procedure linkage
4564 table entry for a local symbol. */
4565 bfd_set_error (bfd_error_bad_value);
4566 return FALSE;
4567 }
4568 else
4569 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4570 rel->r_addend))
4571 return FALSE;
4572 break;
4573
4574 /* The following relocations don't need to propagate the
4575 relocation if linking a shared object since they are
4576 section relative. */
4577 case R_PPC64_SECTOFF:
4578 case R_PPC64_SECTOFF_LO:
4579 case R_PPC64_SECTOFF_HI:
4580 case R_PPC64_SECTOFF_HA:
4581 case R_PPC64_SECTOFF_DS:
4582 case R_PPC64_SECTOFF_LO_DS:
4583 case R_PPC64_DTPREL16:
4584 case R_PPC64_DTPREL16_LO:
4585 case R_PPC64_DTPREL16_HI:
4586 case R_PPC64_DTPREL16_HA:
4587 case R_PPC64_DTPREL16_DS:
4588 case R_PPC64_DTPREL16_LO_DS:
4589 case R_PPC64_DTPREL16_HIGHER:
4590 case R_PPC64_DTPREL16_HIGHERA:
4591 case R_PPC64_DTPREL16_HIGHEST:
4592 case R_PPC64_DTPREL16_HIGHESTA:
4593 break;
4594
4595 /* Nor do these. */
4596 case R_PPC64_TOC16:
4597 case R_PPC64_TOC16_LO:
4598 case R_PPC64_TOC16_HI:
4599 case R_PPC64_TOC16_HA:
4600 case R_PPC64_TOC16_DS:
4601 case R_PPC64_TOC16_LO_DS:
4602 sec->has_toc_reloc = 1;
4603 break;
4604
4605 /* This relocation describes the C++ object vtable hierarchy.
4606 Reconstruct it for later use during GC. */
4607 case R_PPC64_GNU_VTINHERIT:
4608 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4609 return FALSE;
4610 break;
4611
4612 /* This relocation describes which C++ vtable entries are actually
4613 used. Record for later use during GC. */
4614 case R_PPC64_GNU_VTENTRY:
4615 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4616 return FALSE;
4617 break;
4618
4619 case R_PPC64_REL14:
4620 case R_PPC64_REL14_BRTAKEN:
4621 case R_PPC64_REL14_BRNTAKEN:
4622 {
4623 asection *dest = NULL;
4624
4625 /* Heuristic: If jumping outside our section, chances are
4626 we are going to need a stub. */
4627 if (h != NULL)
4628 {
4629 /* If the sym is weak it may be overridden later, so
4630 don't assume we know where a weak sym lives. */
4631 if (h->root.type == bfd_link_hash_defined)
4632 dest = h->root.u.def.section;
4633 }
4634 else
4635 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4636 sec, r_symndx);
4637 if (dest != sec)
4638 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4639 }
4640 /* Fall through. */
4641
4642 case R_PPC64_REL24:
4643 if (h != NULL)
4644 {
4645 /* We may need a .plt entry if the function this reloc
4646 refers to is in a shared lib. */
4647 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4648 rel->r_addend))
4649 return FALSE;
4650 if (h == &htab->tls_get_addr->elf
4651 || h == &htab->tls_get_addr_fd->elf)
4652 sec->has_tls_reloc = 1;
4653 else if (htab->tls_get_addr == NULL
4654 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4655 && (h->root.root.string[15] == 0
4656 || h->root.root.string[15] == '@'))
4657 {
4658 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4659 sec->has_tls_reloc = 1;
4660 }
4661 else if (htab->tls_get_addr_fd == NULL
4662 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4663 && (h->root.root.string[14] == 0
4664 || h->root.root.string[14] == '@'))
4665 {
4666 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4667 sec->has_tls_reloc = 1;
4668 }
4669 }
4670 break;
4671
4672 case R_PPC64_TPREL64:
4673 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4674 if (info->shared)
4675 info->flags |= DF_STATIC_TLS;
4676 goto dotlstoc;
4677
4678 case R_PPC64_DTPMOD64:
4679 if (rel + 1 < rel_end
4680 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4681 && rel[1].r_offset == rel->r_offset + 8)
4682 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4683 else
4684 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4685 goto dotlstoc;
4686
4687 case R_PPC64_DTPREL64:
4688 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4689 if (rel != relocs
4690 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4691 && rel[-1].r_offset == rel->r_offset - 8)
4692 /* This is the second reloc of a dtpmod, dtprel pair.
4693 Don't mark with TLS_DTPREL. */
4694 goto dodyn;
4695
4696 dotlstoc:
4697 sec->has_tls_reloc = 1;
4698 if (h != NULL)
4699 {
4700 struct ppc_link_hash_entry *eh;
4701 eh = (struct ppc_link_hash_entry *) h;
4702 eh->tls_mask |= tls_type;
4703 }
4704 else
4705 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4706 rel->r_addend, tls_type))
4707 return FALSE;
4708
4709 ppc64_sec = ppc64_elf_section_data (sec);
4710 if (ppc64_sec->sec_type != sec_toc)
4711 {
4712 /* One extra to simplify get_tls_mask. */
4713 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4714 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4715 if (ppc64_sec->u.t_symndx == NULL)
4716 return FALSE;
4717 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4718 ppc64_sec->sec_type = sec_toc;
4719 }
4720 BFD_ASSERT (rel->r_offset % 8 == 0);
4721 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4722
4723 /* Mark the second slot of a GD or LD entry.
4724 -1 to indicate GD and -2 to indicate LD. */
4725 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4726 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4727 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4728 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4729 goto dodyn;
4730
4731 case R_PPC64_TPREL16:
4732 case R_PPC64_TPREL16_LO:
4733 case R_PPC64_TPREL16_HI:
4734 case R_PPC64_TPREL16_HA:
4735 case R_PPC64_TPREL16_DS:
4736 case R_PPC64_TPREL16_LO_DS:
4737 case R_PPC64_TPREL16_HIGHER:
4738 case R_PPC64_TPREL16_HIGHERA:
4739 case R_PPC64_TPREL16_HIGHEST:
4740 case R_PPC64_TPREL16_HIGHESTA:
4741 if (info->shared)
4742 {
4743 info->flags |= DF_STATIC_TLS;
4744 goto dodyn;
4745 }
4746 break;
4747
4748 case R_PPC64_ADDR64:
4749 if (opd_sym_map != NULL
4750 && rel + 1 < rel_end
4751 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4752 {
4753 if (h != NULL)
4754 {
4755 if (h->root.root.string[0] == '.'
4756 && h->root.root.string[1] != 0
4757 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4758 ;
4759 else
4760 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4761 }
4762 else
4763 {
4764 asection *s;
4765
4766 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4767 r_symndx);
4768 if (s == NULL)
4769 return FALSE;
4770 else if (s != sec)
4771 opd_sym_map[rel->r_offset / 8] = s;
4772 }
4773 }
4774 /* Fall through. */
4775
4776 case R_PPC64_REL30:
4777 case R_PPC64_REL32:
4778 case R_PPC64_REL64:
4779 case R_PPC64_ADDR14:
4780 case R_PPC64_ADDR14_BRNTAKEN:
4781 case R_PPC64_ADDR14_BRTAKEN:
4782 case R_PPC64_ADDR16:
4783 case R_PPC64_ADDR16_DS:
4784 case R_PPC64_ADDR16_HA:
4785 case R_PPC64_ADDR16_HI:
4786 case R_PPC64_ADDR16_HIGHER:
4787 case R_PPC64_ADDR16_HIGHERA:
4788 case R_PPC64_ADDR16_HIGHEST:
4789 case R_PPC64_ADDR16_HIGHESTA:
4790 case R_PPC64_ADDR16_LO:
4791 case R_PPC64_ADDR16_LO_DS:
4792 case R_PPC64_ADDR24:
4793 case R_PPC64_ADDR32:
4794 case R_PPC64_UADDR16:
4795 case R_PPC64_UADDR32:
4796 case R_PPC64_UADDR64:
4797 case R_PPC64_TOC:
4798 if (h != NULL && !info->shared)
4799 /* We may need a copy reloc. */
4800 h->non_got_ref = 1;
4801
4802 /* Don't propagate .opd relocs. */
4803 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4804 break;
4805
4806 /* If we are creating a shared library, and this is a reloc
4807 against a global symbol, or a non PC relative reloc
4808 against a local symbol, then we need to copy the reloc
4809 into the shared library. However, if we are linking with
4810 -Bsymbolic, we do not need to copy a reloc against a
4811 global symbol which is defined in an object we are
4812 including in the link (i.e., DEF_REGULAR is set). At
4813 this point we have not seen all the input files, so it is
4814 possible that DEF_REGULAR is not set now but will be set
4815 later (it is never cleared). In case of a weak definition,
4816 DEF_REGULAR may be cleared later by a strong definition in
4817 a shared library. We account for that possibility below by
4818 storing information in the dyn_relocs field of the hash
4819 table entry. A similar situation occurs when creating
4820 shared libraries and symbol visibility changes render the
4821 symbol local.
4822
4823 If on the other hand, we are creating an executable, we
4824 may need to keep relocations for symbols satisfied by a
4825 dynamic library if we manage to avoid copy relocs for the
4826 symbol. */
4827 dodyn:
4828 if ((info->shared
4829 && (MUST_BE_DYN_RELOC (r_type)
4830 || (h != NULL
4831 && (! info->symbolic
4832 || h->root.type == bfd_link_hash_defweak
4833 || !h->def_regular))))
4834 || (ELIMINATE_COPY_RELOCS
4835 && !info->shared
4836 && h != NULL
4837 && (h->root.type == bfd_link_hash_defweak
4838 || !h->def_regular)))
4839 {
4840 struct ppc_dyn_relocs *p;
4841 struct ppc_dyn_relocs **head;
4842
4843 /* We must copy these reloc types into the output file.
4844 Create a reloc section in dynobj and make room for
4845 this reloc. */
4846 if (sreloc == NULL)
4847 {
4848 const char *name;
4849 bfd *dynobj;
4850
4851 name = (bfd_elf_string_from_elf_section
4852 (abfd,
4853 elf_elfheader (abfd)->e_shstrndx,
4854 elf_section_data (sec)->rel_hdr.sh_name));
4855 if (name == NULL)
4856 return FALSE;
4857
4858 if (! CONST_STRNEQ (name, ".rela")
4859 || strcmp (bfd_get_section_name (abfd, sec),
4860 name + 5) != 0)
4861 {
4862 (*_bfd_error_handler)
4863 (_("%B: bad relocation section name `%s\'"),
4864 abfd, name);
4865 bfd_set_error (bfd_error_bad_value);
4866 }
4867
4868 dynobj = htab->elf.dynobj;
4869 sreloc = bfd_get_section_by_name (dynobj, name);
4870 if (sreloc == NULL)
4871 {
4872 flagword flags;
4873
4874 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4875 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4876 | SEC_ALLOC | SEC_LOAD);
4877 sreloc = bfd_make_section_with_flags (dynobj,
4878 name,
4879 flags);
4880 if (sreloc == NULL
4881 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4882 return FALSE;
4883 }
4884 elf_section_data (sec)->sreloc = sreloc;
4885 }
4886
4887 /* If this is a global symbol, we count the number of
4888 relocations we need for this symbol. */
4889 if (h != NULL)
4890 {
4891 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4892 }
4893 else
4894 {
4895 /* Track dynamic relocs needed for local syms too.
4896 We really need local syms available to do this
4897 easily. Oh well. */
4898
4899 asection *s;
4900 void *vpp;
4901
4902 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4903 sec, r_symndx);
4904 if (s == NULL)
4905 return FALSE;
4906
4907 vpp = &elf_section_data (s)->local_dynrel;
4908 head = (struct ppc_dyn_relocs **) vpp;
4909 }
4910
4911 p = *head;
4912 if (p == NULL || p->sec != sec)
4913 {
4914 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4915 if (p == NULL)
4916 return FALSE;
4917 p->next = *head;
4918 *head = p;
4919 p->sec = sec;
4920 p->count = 0;
4921 p->pc_count = 0;
4922 }
4923
4924 p->count += 1;
4925 if (!MUST_BE_DYN_RELOC (r_type))
4926 p->pc_count += 1;
4927 }
4928 break;
4929
4930 default:
4931 break;
4932 }
4933 }
4934
4935 return TRUE;
4936 }
4937
4938 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4939 of the code entry point, and its section. */
4940
4941 static bfd_vma
4942 opd_entry_value (asection *opd_sec,
4943 bfd_vma offset,
4944 asection **code_sec,
4945 bfd_vma *code_off)
4946 {
4947 bfd *opd_bfd = opd_sec->owner;
4948 Elf_Internal_Rela *relocs;
4949 Elf_Internal_Rela *lo, *hi, *look;
4950 bfd_vma val;
4951
4952 /* No relocs implies we are linking a --just-symbols object. */
4953 if (opd_sec->reloc_count == 0)
4954 {
4955 bfd_vma val;
4956
4957 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4958 return (bfd_vma) -1;
4959
4960 if (code_sec != NULL)
4961 {
4962 asection *sec, *likely = NULL;
4963 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4964 if (sec->vma <= val
4965 && (sec->flags & SEC_LOAD) != 0
4966 && (sec->flags & SEC_ALLOC) != 0)
4967 likely = sec;
4968 if (likely != NULL)
4969 {
4970 *code_sec = likely;
4971 if (code_off != NULL)
4972 *code_off = val - likely->vma;
4973 }
4974 }
4975 return val;
4976 }
4977
4978 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4979 if (relocs == NULL)
4980 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4981
4982 /* Go find the opd reloc at the sym address. */
4983 lo = relocs;
4984 BFD_ASSERT (lo != NULL);
4985 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4986 val = (bfd_vma) -1;
4987 while (lo < hi)
4988 {
4989 look = lo + (hi - lo) / 2;
4990 if (look->r_offset < offset)
4991 lo = look + 1;
4992 else if (look->r_offset > offset)
4993 hi = look;
4994 else
4995 {
4996 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4997 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4998 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4999 {
5000 unsigned long symndx = ELF64_R_SYM (look->r_info);
5001 asection *sec;
5002
5003 if (symndx < symtab_hdr->sh_info)
5004 {
5005 Elf_Internal_Sym *sym;
5006
5007 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5008 if (sym == NULL)
5009 {
5010 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5011 symtab_hdr->sh_info,
5012 0, NULL, NULL, NULL);
5013 if (sym == NULL)
5014 break;
5015 symtab_hdr->contents = (bfd_byte *) sym;
5016 }
5017
5018 sym += symndx;
5019 val = sym->st_value;
5020 sec = NULL;
5021 if ((sym->st_shndx != SHN_UNDEF
5022 && sym->st_shndx < SHN_LORESERVE)
5023 || sym->st_shndx > SHN_HIRESERVE)
5024 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5025 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5026 }
5027 else
5028 {
5029 struct elf_link_hash_entry **sym_hashes;
5030 struct elf_link_hash_entry *rh;
5031
5032 sym_hashes = elf_sym_hashes (opd_bfd);
5033 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5034 while (rh->root.type == bfd_link_hash_indirect
5035 || rh->root.type == bfd_link_hash_warning)
5036 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5037 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5038 || rh->root.type == bfd_link_hash_defweak);
5039 val = rh->root.u.def.value;
5040 sec = rh->root.u.def.section;
5041 }
5042 val += look->r_addend;
5043 if (code_off != NULL)
5044 *code_off = val;
5045 if (code_sec != NULL)
5046 *code_sec = sec;
5047 if (sec != NULL && sec->output_section != NULL)
5048 val += sec->output_section->vma + sec->output_offset;
5049 }
5050 break;
5051 }
5052 }
5053
5054 return val;
5055 }
5056
5057 /* Mark sections containing dynamically referenced symbols. When
5058 building shared libraries, we must assume that any visible symbol is
5059 referenced. */
5060
5061 static bfd_boolean
5062 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5063 {
5064 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5065 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5066
5067 if (eh->elf.root.type == bfd_link_hash_warning)
5068 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5069
5070 /* Dynamic linking info is on the func descriptor sym. */
5071 if (eh->oh != NULL
5072 && eh->oh->is_func_descriptor
5073 && (eh->oh->elf.root.type == bfd_link_hash_defined
5074 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5075 eh = eh->oh;
5076
5077 if ((eh->elf.root.type == bfd_link_hash_defined
5078 || eh->elf.root.type == bfd_link_hash_defweak)
5079 && (eh->elf.ref_dynamic
5080 || (!info->executable
5081 && eh->elf.def_regular
5082 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5083 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5084 {
5085 asection *code_sec;
5086
5087 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5088
5089 /* Function descriptor syms cause the associated
5090 function code sym section to be marked. */
5091 if (eh->is_func_descriptor
5092 && (eh->oh->elf.root.type == bfd_link_hash_defined
5093 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5094 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5095 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5096 && opd_entry_value (eh->elf.root.u.def.section,
5097 eh->elf.root.u.def.value,
5098 &code_sec, NULL) != (bfd_vma) -1)
5099 code_sec->flags |= SEC_KEEP;
5100 }
5101
5102 return TRUE;
5103 }
5104
5105 /* Return the section that should be marked against GC for a given
5106 relocation. */
5107
5108 static asection *
5109 ppc64_elf_gc_mark_hook (asection *sec,
5110 struct bfd_link_info *info,
5111 Elf_Internal_Rela *rel,
5112 struct elf_link_hash_entry *h,
5113 Elf_Internal_Sym *sym)
5114 {
5115 asection *rsec;
5116
5117 /* First mark all our entry sym sections. */
5118 if (info->gc_sym_list != NULL)
5119 {
5120 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5121 struct bfd_sym_chain *sym = info->gc_sym_list;
5122
5123 info->gc_sym_list = NULL;
5124 for (; sym != NULL; sym = sym->next)
5125 {
5126 struct ppc_link_hash_entry *eh;
5127
5128 eh = (struct ppc_link_hash_entry *)
5129 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5130 if (eh == NULL)
5131 continue;
5132 if (eh->elf.root.type != bfd_link_hash_defined
5133 && eh->elf.root.type != bfd_link_hash_defweak)
5134 continue;
5135
5136 if (eh->is_func_descriptor
5137 && (eh->oh->elf.root.type == bfd_link_hash_defined
5138 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5139 rsec = eh->oh->elf.root.u.def.section;
5140 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5141 && opd_entry_value (eh->elf.root.u.def.section,
5142 eh->elf.root.u.def.value,
5143 &rsec, NULL) != (bfd_vma) -1)
5144 ;
5145 else
5146 continue;
5147
5148 if (!rsec->gc_mark)
5149 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5150
5151 rsec = eh->elf.root.u.def.section;
5152 if (!rsec->gc_mark)
5153 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5154 }
5155 }
5156
5157 /* Syms return NULL if we're marking .opd, so we avoid marking all
5158 function sections, as all functions are referenced in .opd. */
5159 rsec = NULL;
5160 if (get_opd_info (sec) != NULL)
5161 return rsec;
5162
5163 if (h != NULL)
5164 {
5165 enum elf_ppc64_reloc_type r_type;
5166 struct ppc_link_hash_entry *eh;
5167
5168 r_type = ELF64_R_TYPE (rel->r_info);
5169 switch (r_type)
5170 {
5171 case R_PPC64_GNU_VTINHERIT:
5172 case R_PPC64_GNU_VTENTRY:
5173 break;
5174
5175 default:
5176 switch (h->root.type)
5177 {
5178 case bfd_link_hash_defined:
5179 case bfd_link_hash_defweak:
5180 eh = (struct ppc_link_hash_entry *) h;
5181 if (eh->oh != NULL
5182 && eh->oh->is_func_descriptor
5183 && (eh->oh->elf.root.type == bfd_link_hash_defined
5184 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5185 eh = eh->oh;
5186
5187 /* Function descriptor syms cause the associated
5188 function code sym section to be marked. */
5189 if (eh->is_func_descriptor
5190 && (eh->oh->elf.root.type == bfd_link_hash_defined
5191 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5192 {
5193 /* They also mark their opd section. */
5194 if (!eh->elf.root.u.def.section->gc_mark)
5195 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5196 ppc64_elf_gc_mark_hook);
5197
5198 rsec = eh->oh->elf.root.u.def.section;
5199 }
5200 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5201 && opd_entry_value (eh->elf.root.u.def.section,
5202 eh->elf.root.u.def.value,
5203 &rsec, NULL) != (bfd_vma) -1)
5204 {
5205 if (!eh->elf.root.u.def.section->gc_mark)
5206 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5207 ppc64_elf_gc_mark_hook);
5208 }
5209 else
5210 rsec = h->root.u.def.section;
5211 break;
5212
5213 case bfd_link_hash_common:
5214 rsec = h->root.u.c.p->section;
5215 break;
5216
5217 default:
5218 break;
5219 }
5220 }
5221 }
5222 else
5223 {
5224 asection **opd_sym_section;
5225
5226 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5227 opd_sym_section = get_opd_info (rsec);
5228 if (opd_sym_section != NULL)
5229 {
5230 if (!rsec->gc_mark)
5231 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5232
5233 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5234 }
5235 }
5236
5237 return rsec;
5238 }
5239
5240 /* Update the .got, .plt. and dynamic reloc reference counts for the
5241 section being removed. */
5242
5243 static bfd_boolean
5244 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5245 asection *sec, const Elf_Internal_Rela *relocs)
5246 {
5247 struct ppc_link_hash_table *htab;
5248 Elf_Internal_Shdr *symtab_hdr;
5249 struct elf_link_hash_entry **sym_hashes;
5250 struct got_entry **local_got_ents;
5251 const Elf_Internal_Rela *rel, *relend;
5252
5253 if ((sec->flags & SEC_ALLOC) == 0)
5254 return TRUE;
5255
5256 elf_section_data (sec)->local_dynrel = NULL;
5257
5258 htab = ppc_hash_table (info);
5259 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5260 sym_hashes = elf_sym_hashes (abfd);
5261 local_got_ents = elf_local_got_ents (abfd);
5262
5263 relend = relocs + sec->reloc_count;
5264 for (rel = relocs; rel < relend; rel++)
5265 {
5266 unsigned long r_symndx;
5267 enum elf_ppc64_reloc_type r_type;
5268 struct elf_link_hash_entry *h = NULL;
5269 char tls_type = 0;
5270
5271 r_symndx = ELF64_R_SYM (rel->r_info);
5272 r_type = ELF64_R_TYPE (rel->r_info);
5273 if (r_symndx >= symtab_hdr->sh_info)
5274 {
5275 struct ppc_link_hash_entry *eh;
5276 struct ppc_dyn_relocs **pp;
5277 struct ppc_dyn_relocs *p;
5278
5279 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5280 while (h->root.type == bfd_link_hash_indirect
5281 || h->root.type == bfd_link_hash_warning)
5282 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5283 eh = (struct ppc_link_hash_entry *) h;
5284
5285 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5286 if (p->sec == sec)
5287 {
5288 /* Everything must go for SEC. */
5289 *pp = p->next;
5290 break;
5291 }
5292 }
5293
5294 switch (r_type)
5295 {
5296 case R_PPC64_GOT_TLSLD16:
5297 case R_PPC64_GOT_TLSLD16_LO:
5298 case R_PPC64_GOT_TLSLD16_HI:
5299 case R_PPC64_GOT_TLSLD16_HA:
5300 ppc64_tlsld_got (abfd)->refcount -= 1;
5301 tls_type = TLS_TLS | TLS_LD;
5302 goto dogot;
5303
5304 case R_PPC64_GOT_TLSGD16:
5305 case R_PPC64_GOT_TLSGD16_LO:
5306 case R_PPC64_GOT_TLSGD16_HI:
5307 case R_PPC64_GOT_TLSGD16_HA:
5308 tls_type = TLS_TLS | TLS_GD;
5309 goto dogot;
5310
5311 case R_PPC64_GOT_TPREL16_DS:
5312 case R_PPC64_GOT_TPREL16_LO_DS:
5313 case R_PPC64_GOT_TPREL16_HI:
5314 case R_PPC64_GOT_TPREL16_HA:
5315 tls_type = TLS_TLS | TLS_TPREL;
5316 goto dogot;
5317
5318 case R_PPC64_GOT_DTPREL16_DS:
5319 case R_PPC64_GOT_DTPREL16_LO_DS:
5320 case R_PPC64_GOT_DTPREL16_HI:
5321 case R_PPC64_GOT_DTPREL16_HA:
5322 tls_type = TLS_TLS | TLS_DTPREL;
5323 goto dogot;
5324
5325 case R_PPC64_GOT16:
5326 case R_PPC64_GOT16_DS:
5327 case R_PPC64_GOT16_HA:
5328 case R_PPC64_GOT16_HI:
5329 case R_PPC64_GOT16_LO:
5330 case R_PPC64_GOT16_LO_DS:
5331 dogot:
5332 {
5333 struct got_entry *ent;
5334
5335 if (h != NULL)
5336 ent = h->got.glist;
5337 else
5338 ent = local_got_ents[r_symndx];
5339
5340 for (; ent != NULL; ent = ent->next)
5341 if (ent->addend == rel->r_addend
5342 && ent->owner == abfd
5343 && ent->tls_type == tls_type)
5344 break;
5345 if (ent == NULL)
5346 abort ();
5347 if (ent->got.refcount > 0)
5348 ent->got.refcount -= 1;
5349 }
5350 break;
5351
5352 case R_PPC64_PLT16_HA:
5353 case R_PPC64_PLT16_HI:
5354 case R_PPC64_PLT16_LO:
5355 case R_PPC64_PLT32:
5356 case R_PPC64_PLT64:
5357 case R_PPC64_REL14:
5358 case R_PPC64_REL14_BRNTAKEN:
5359 case R_PPC64_REL14_BRTAKEN:
5360 case R_PPC64_REL24:
5361 if (h != NULL)
5362 {
5363 struct plt_entry *ent;
5364
5365 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5366 if (ent->addend == rel->r_addend)
5367 break;
5368 if (ent == NULL)
5369 abort ();
5370 if (ent->plt.refcount > 0)
5371 ent->plt.refcount -= 1;
5372 }
5373 break;
5374
5375 default:
5376 break;
5377 }
5378 }
5379 return TRUE;
5380 }
5381
5382 /* The maximum size of .sfpr. */
5383 #define SFPR_MAX (218*4)
5384
5385 struct sfpr_def_parms
5386 {
5387 const char name[12];
5388 unsigned char lo, hi;
5389 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5390 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5391 };
5392
5393 /* Auto-generate _save*, _rest* functions in .sfpr. */
5394
5395 static unsigned int
5396 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5397 {
5398 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5399 unsigned int i;
5400 size_t len = strlen (parm->name);
5401 bfd_boolean writing = FALSE;
5402 char sym[16];
5403
5404 memcpy (sym, parm->name, len);
5405 sym[len + 2] = 0;
5406
5407 for (i = parm->lo; i <= parm->hi; i++)
5408 {
5409 struct elf_link_hash_entry *h;
5410
5411 sym[len + 0] = i / 10 + '0';
5412 sym[len + 1] = i % 10 + '0';
5413 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5414 if (h != NULL
5415 && !h->def_regular)
5416 {
5417 h->root.type = bfd_link_hash_defined;
5418 h->root.u.def.section = htab->sfpr;
5419 h->root.u.def.value = htab->sfpr->size;
5420 h->type = STT_FUNC;
5421 h->def_regular = 1;
5422 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5423 writing = TRUE;
5424 if (htab->sfpr->contents == NULL)
5425 {
5426 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5427 if (htab->sfpr->contents == NULL)
5428 return FALSE;
5429 }
5430 }
5431 if (writing)
5432 {
5433 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5434 if (i != parm->hi)
5435 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5436 else
5437 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5438 htab->sfpr->size = p - htab->sfpr->contents;
5439 }
5440 }
5441
5442 return TRUE;
5443 }
5444
5445 static bfd_byte *
5446 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5447 {
5448 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5449 return p + 4;
5450 }
5451
5452 static bfd_byte *
5453 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5454 {
5455 p = savegpr0 (abfd, p, r);
5456 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5457 p = p + 4;
5458 bfd_put_32 (abfd, BLR, p);
5459 return p + 4;
5460 }
5461
5462 static bfd_byte *
5463 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5464 {
5465 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5466 return p + 4;
5467 }
5468
5469 static bfd_byte *
5470 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5471 {
5472 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5473 p = p + 4;
5474 p = restgpr0 (abfd, p, r);
5475 bfd_put_32 (abfd, MTLR_R0, p);
5476 p = p + 4;
5477 if (r == 29)
5478 {
5479 p = restgpr0 (abfd, p, 30);
5480 p = restgpr0 (abfd, p, 31);
5481 }
5482 bfd_put_32 (abfd, BLR, p);
5483 return p + 4;
5484 }
5485
5486 static bfd_byte *
5487 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5488 {
5489 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5490 return p + 4;
5491 }
5492
5493 static bfd_byte *
5494 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5495 {
5496 p = savegpr1 (abfd, p, r);
5497 bfd_put_32 (abfd, BLR, p);
5498 return p + 4;
5499 }
5500
5501 static bfd_byte *
5502 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5503 {
5504 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5505 return p + 4;
5506 }
5507
5508 static bfd_byte *
5509 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5510 {
5511 p = restgpr1 (abfd, p, r);
5512 bfd_put_32 (abfd, BLR, p);
5513 return p + 4;
5514 }
5515
5516 static bfd_byte *
5517 savefpr (bfd *abfd, bfd_byte *p, int r)
5518 {
5519 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5520 return p + 4;
5521 }
5522
5523 static bfd_byte *
5524 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5525 {
5526 p = savefpr (abfd, p, r);
5527 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5528 p = p + 4;
5529 bfd_put_32 (abfd, BLR, p);
5530 return p + 4;
5531 }
5532
5533 static bfd_byte *
5534 restfpr (bfd *abfd, bfd_byte *p, int r)
5535 {
5536 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5537 return p + 4;
5538 }
5539
5540 static bfd_byte *
5541 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5542 {
5543 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5544 p = p + 4;
5545 p = restfpr (abfd, p, r);
5546 bfd_put_32 (abfd, MTLR_R0, p);
5547 p = p + 4;
5548 if (r == 29)
5549 {
5550 p = restfpr (abfd, p, 30);
5551 p = restfpr (abfd, p, 31);
5552 }
5553 bfd_put_32 (abfd, BLR, p);
5554 return p + 4;
5555 }
5556
5557 static bfd_byte *
5558 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5559 {
5560 p = savefpr (abfd, p, r);
5561 bfd_put_32 (abfd, BLR, p);
5562 return p + 4;
5563 }
5564
5565 static bfd_byte *
5566 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5567 {
5568 p = restfpr (abfd, p, r);
5569 bfd_put_32 (abfd, BLR, p);
5570 return p + 4;
5571 }
5572
5573 static bfd_byte *
5574 savevr (bfd *abfd, bfd_byte *p, int r)
5575 {
5576 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5577 p = p + 4;
5578 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5579 return p + 4;
5580 }
5581
5582 static bfd_byte *
5583 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5584 {
5585 p = savevr (abfd, p, r);
5586 bfd_put_32 (abfd, BLR, p);
5587 return p + 4;
5588 }
5589
5590 static bfd_byte *
5591 restvr (bfd *abfd, bfd_byte *p, int r)
5592 {
5593 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5594 p = p + 4;
5595 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5596 return p + 4;
5597 }
5598
5599 static bfd_byte *
5600 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5601 {
5602 p = restvr (abfd, p, r);
5603 bfd_put_32 (abfd, BLR, p);
5604 return p + 4;
5605 }
5606
5607 /* Called via elf_link_hash_traverse to transfer dynamic linking
5608 information on function code symbol entries to their corresponding
5609 function descriptor symbol entries. */
5610
5611 static bfd_boolean
5612 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5613 {
5614 struct bfd_link_info *info;
5615 struct ppc_link_hash_table *htab;
5616 struct plt_entry *ent;
5617 struct ppc_link_hash_entry *fh;
5618 struct ppc_link_hash_entry *fdh;
5619 bfd_boolean force_local;
5620
5621 fh = (struct ppc_link_hash_entry *) h;
5622 if (fh->elf.root.type == bfd_link_hash_indirect)
5623 return TRUE;
5624
5625 if (fh->elf.root.type == bfd_link_hash_warning)
5626 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5627
5628 info = inf;
5629 htab = ppc_hash_table (info);
5630
5631 /* Resolve undefined references to dot-symbols as the value
5632 in the function descriptor, if we have one in a regular object.
5633 This is to satisfy cases like ".quad .foo". Calls to functions
5634 in dynamic objects are handled elsewhere. */
5635 if (fh->elf.root.type == bfd_link_hash_undefweak
5636 && fh->was_undefined
5637 && (fh->oh->elf.root.type == bfd_link_hash_defined
5638 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5639 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5640 && opd_entry_value (fh->oh->elf.root.u.def.section,
5641 fh->oh->elf.root.u.def.value,
5642 &fh->elf.root.u.def.section,
5643 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5644 {
5645 fh->elf.root.type = fh->oh->elf.root.type;
5646 fh->elf.forced_local = 1;
5647 }
5648
5649 /* If this is a function code symbol, transfer dynamic linking
5650 information to the function descriptor symbol. */
5651 if (!fh->is_func)
5652 return TRUE;
5653
5654 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5655 if (ent->plt.refcount > 0)
5656 break;
5657 if (ent == NULL
5658 || fh->elf.root.root.string[0] != '.'
5659 || fh->elf.root.root.string[1] == '\0')
5660 return TRUE;
5661
5662 /* Find the corresponding function descriptor symbol. Create it
5663 as undefined if necessary. */
5664
5665 fdh = get_fdh (fh, htab);
5666 if (fdh != NULL)
5667 while (fdh->elf.root.type == bfd_link_hash_indirect
5668 || fdh->elf.root.type == bfd_link_hash_warning)
5669 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5670
5671 if (fdh == NULL
5672 && info->shared
5673 && (fh->elf.root.type == bfd_link_hash_undefined
5674 || fh->elf.root.type == bfd_link_hash_undefweak))
5675 {
5676 fdh = make_fdh (info, fh);
5677 if (fdh == NULL)
5678 return FALSE;
5679 }
5680
5681 /* Fake function descriptors are made undefweak. If the function
5682 code symbol is strong undefined, make the fake sym the same.
5683 If the function code symbol is defined, then force the fake
5684 descriptor local; We can't support overriding of symbols in a
5685 shared library on a fake descriptor. */
5686
5687 if (fdh != NULL
5688 && fdh->fake
5689 && fdh->elf.root.type == bfd_link_hash_undefweak)
5690 {
5691 if (fh->elf.root.type == bfd_link_hash_undefined)
5692 {
5693 fdh->elf.root.type = bfd_link_hash_undefined;
5694 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5695 }
5696 else if (fh->elf.root.type == bfd_link_hash_defined
5697 || fh->elf.root.type == bfd_link_hash_defweak)
5698 {
5699 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5700 }
5701 }
5702
5703 if (fdh != NULL
5704 && !fdh->elf.forced_local
5705 && (info->shared
5706 || fdh->elf.def_dynamic
5707 || fdh->elf.ref_dynamic
5708 || (fdh->elf.root.type == bfd_link_hash_undefweak
5709 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5710 {
5711 if (fdh->elf.dynindx == -1)
5712 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5713 return FALSE;
5714 fdh->elf.ref_regular |= fh->elf.ref_regular;
5715 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5716 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5717 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5718 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5719 {
5720 move_plt_plist (fh, fdh);
5721 fdh->elf.needs_plt = 1;
5722 }
5723 fdh->is_func_descriptor = 1;
5724 fdh->oh = fh;
5725 fh->oh = fdh;
5726 }
5727
5728 /* Now that the info is on the function descriptor, clear the
5729 function code sym info. Any function code syms for which we
5730 don't have a definition in a regular file, we force local.
5731 This prevents a shared library from exporting syms that have
5732 been imported from another library. Function code syms that
5733 are really in the library we must leave global to prevent the
5734 linker dragging in a definition from a static library. */
5735 force_local = (!fh->elf.def_regular
5736 || fdh == NULL
5737 || !fdh->elf.def_regular
5738 || fdh->elf.forced_local);
5739 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5740
5741 return TRUE;
5742 }
5743
5744 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5745 this hook to a) provide some gcc support functions, and b) transfer
5746 dynamic linking information gathered so far on function code symbol
5747 entries, to their corresponding function descriptor symbol entries. */
5748
5749 static bfd_boolean
5750 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5751 struct bfd_link_info *info)
5752 {
5753 struct ppc_link_hash_table *htab;
5754 unsigned int i;
5755 const struct sfpr_def_parms funcs[] =
5756 {
5757 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5758 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5759 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5760 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5761 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5762 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5763 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5764 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5765 { "._savef", 14, 31, savefpr, savefpr1_tail },
5766 { "._restf", 14, 31, restfpr, restfpr1_tail },
5767 { "_savevr_", 20, 31, savevr, savevr_tail },
5768 { "_restvr_", 20, 31, restvr, restvr_tail }
5769 };
5770
5771 htab = ppc_hash_table (info);
5772 if (htab->sfpr == NULL)
5773 /* We don't have any relocs. */
5774 return TRUE;
5775
5776 /* Provide any missing _save* and _rest* functions. */
5777 htab->sfpr->size = 0;
5778 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5779 if (!sfpr_define (info, &funcs[i]))
5780 return FALSE;
5781
5782 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5783
5784 if (htab->sfpr->size == 0)
5785 htab->sfpr->flags |= SEC_EXCLUDE;
5786
5787 return TRUE;
5788 }
5789
5790 /* Adjust a symbol defined by a dynamic object and referenced by a
5791 regular object. The current definition is in some section of the
5792 dynamic object, but we're not including those sections. We have to
5793 change the definition to something the rest of the link can
5794 understand. */
5795
5796 static bfd_boolean
5797 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5798 struct elf_link_hash_entry *h)
5799 {
5800 struct ppc_link_hash_table *htab;
5801 asection *s;
5802
5803 htab = ppc_hash_table (info);
5804
5805 /* Deal with function syms. */
5806 if (h->type == STT_FUNC
5807 || h->needs_plt)
5808 {
5809 /* Clear procedure linkage table information for any symbol that
5810 won't need a .plt entry. */
5811 struct plt_entry *ent;
5812 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5813 if (ent->plt.refcount > 0)
5814 break;
5815 if (ent == NULL
5816 || SYMBOL_CALLS_LOCAL (info, h)
5817 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5818 && h->root.type == bfd_link_hash_undefweak))
5819 {
5820 h->plt.plist = NULL;
5821 h->needs_plt = 0;
5822 }
5823 }
5824 else
5825 h->plt.plist = NULL;
5826
5827 /* If this is a weak symbol, and there is a real definition, the
5828 processor independent code will have arranged for us to see the
5829 real definition first, and we can just use the same value. */
5830 if (h->u.weakdef != NULL)
5831 {
5832 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5833 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5834 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5835 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5836 if (ELIMINATE_COPY_RELOCS)
5837 h->non_got_ref = h->u.weakdef->non_got_ref;
5838 return TRUE;
5839 }
5840
5841 /* If we are creating a shared library, we must presume that the
5842 only references to the symbol are via the global offset table.
5843 For such cases we need not do anything here; the relocations will
5844 be handled correctly by relocate_section. */
5845 if (info->shared)
5846 return TRUE;
5847
5848 /* If there are no references to this symbol that do not use the
5849 GOT, we don't need to generate a copy reloc. */
5850 if (!h->non_got_ref)
5851 return TRUE;
5852
5853 /* Don't generate a copy reloc for symbols defined in the executable. */
5854 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
5855 return TRUE;
5856
5857 if (ELIMINATE_COPY_RELOCS)
5858 {
5859 struct ppc_link_hash_entry * eh;
5860 struct ppc_dyn_relocs *p;
5861
5862 eh = (struct ppc_link_hash_entry *) h;
5863 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5864 {
5865 s = p->sec->output_section;
5866 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5867 break;
5868 }
5869
5870 /* If we didn't find any dynamic relocs in read-only sections, then
5871 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5872 if (p == NULL)
5873 {
5874 h->non_got_ref = 0;
5875 return TRUE;
5876 }
5877 }
5878
5879 if (h->plt.plist != NULL)
5880 {
5881 /* We should never get here, but unfortunately there are versions
5882 of gcc out there that improperly (for this ABI) put initialized
5883 function pointers, vtable refs and suchlike in read-only
5884 sections. Allow them to proceed, but warn that this might
5885 break at runtime. */
5886 (*_bfd_error_handler)
5887 (_("copy reloc against `%s' requires lazy plt linking; "
5888 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5889 h->root.root.string);
5890 }
5891
5892 /* This is a reference to a symbol defined by a dynamic object which
5893 is not a function. */
5894
5895 if (h->size == 0)
5896 {
5897 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5898 h->root.root.string);
5899 return TRUE;
5900 }
5901
5902 /* We must allocate the symbol in our .dynbss section, which will
5903 become part of the .bss section of the executable. There will be
5904 an entry for this symbol in the .dynsym section. The dynamic
5905 object will contain position independent code, so all references
5906 from the dynamic object to this symbol will go through the global
5907 offset table. The dynamic linker will use the .dynsym entry to
5908 determine the address it must put in the global offset table, so
5909 both the dynamic object and the regular object will refer to the
5910 same memory location for the variable. */
5911
5912 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5913 to copy the initial value out of the dynamic object and into the
5914 runtime process image. We need to remember the offset into the
5915 .rela.bss section we are going to use. */
5916 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5917 {
5918 htab->relbss->size += sizeof (Elf64_External_Rela);
5919 h->needs_copy = 1;
5920 }
5921
5922 s = htab->dynbss;
5923
5924 return _bfd_elf_adjust_dynamic_copy (h, s);
5925 }
5926
5927 /* If given a function descriptor symbol, hide both the function code
5928 sym and the descriptor. */
5929 static void
5930 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5931 struct elf_link_hash_entry *h,
5932 bfd_boolean force_local)
5933 {
5934 struct ppc_link_hash_entry *eh;
5935 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5936
5937 eh = (struct ppc_link_hash_entry *) h;
5938 if (eh->is_func_descriptor)
5939 {
5940 struct ppc_link_hash_entry *fh = eh->oh;
5941
5942 if (fh == NULL)
5943 {
5944 const char *p, *q;
5945 struct ppc_link_hash_table *htab;
5946 char save;
5947
5948 /* We aren't supposed to use alloca in BFD because on
5949 systems which do not have alloca the version in libiberty
5950 calls xmalloc, which might cause the program to crash
5951 when it runs out of memory. This function doesn't have a
5952 return status, so there's no way to gracefully return an
5953 error. So cheat. We know that string[-1] can be safely
5954 accessed; It's either a string in an ELF string table,
5955 or allocated in an objalloc structure. */
5956
5957 p = eh->elf.root.root.string - 1;
5958 save = *p;
5959 *(char *) p = '.';
5960 htab = ppc_hash_table (info);
5961 fh = (struct ppc_link_hash_entry *)
5962 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5963 *(char *) p = save;
5964
5965 /* Unfortunately, if it so happens that the string we were
5966 looking for was allocated immediately before this string,
5967 then we overwrote the string terminator. That's the only
5968 reason the lookup should fail. */
5969 if (fh == NULL)
5970 {
5971 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5972 while (q >= eh->elf.root.root.string && *q == *p)
5973 --q, --p;
5974 if (q < eh->elf.root.root.string && *p == '.')
5975 fh = (struct ppc_link_hash_entry *)
5976 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5977 }
5978 if (fh != NULL)
5979 {
5980 eh->oh = fh;
5981 fh->oh = eh;
5982 }
5983 }
5984 if (fh != NULL)
5985 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5986 }
5987 }
5988
5989 static bfd_boolean
5990 get_sym_h (struct elf_link_hash_entry **hp,
5991 Elf_Internal_Sym **symp,
5992 asection **symsecp,
5993 char **tls_maskp,
5994 Elf_Internal_Sym **locsymsp,
5995 unsigned long r_symndx,
5996 bfd *ibfd)
5997 {
5998 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5999
6000 if (r_symndx >= symtab_hdr->sh_info)
6001 {
6002 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6003 struct elf_link_hash_entry *h;
6004
6005 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6006 while (h->root.type == bfd_link_hash_indirect
6007 || h->root.type == bfd_link_hash_warning)
6008 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6009
6010 if (hp != NULL)
6011 *hp = h;
6012
6013 if (symp != NULL)
6014 *symp = NULL;
6015
6016 if (symsecp != NULL)
6017 {
6018 asection *symsec = NULL;
6019 if (h->root.type == bfd_link_hash_defined
6020 || h->root.type == bfd_link_hash_defweak)
6021 symsec = h->root.u.def.section;
6022 *symsecp = symsec;
6023 }
6024
6025 if (tls_maskp != NULL)
6026 {
6027 struct ppc_link_hash_entry *eh;
6028
6029 eh = (struct ppc_link_hash_entry *) h;
6030 *tls_maskp = &eh->tls_mask;
6031 }
6032 }
6033 else
6034 {
6035 Elf_Internal_Sym *sym;
6036 Elf_Internal_Sym *locsyms = *locsymsp;
6037
6038 if (locsyms == NULL)
6039 {
6040 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6041 if (locsyms == NULL)
6042 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6043 symtab_hdr->sh_info,
6044 0, NULL, NULL, NULL);
6045 if (locsyms == NULL)
6046 return FALSE;
6047 *locsymsp = locsyms;
6048 }
6049 sym = locsyms + r_symndx;
6050
6051 if (hp != NULL)
6052 *hp = NULL;
6053
6054 if (symp != NULL)
6055 *symp = sym;
6056
6057 if (symsecp != NULL)
6058 {
6059 asection *symsec = NULL;
6060 if ((sym->st_shndx != SHN_UNDEF
6061 && sym->st_shndx < SHN_LORESERVE)
6062 || sym->st_shndx > SHN_HIRESERVE)
6063 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6064 *symsecp = symsec;
6065 }
6066
6067 if (tls_maskp != NULL)
6068 {
6069 struct got_entry **lgot_ents;
6070 char *tls_mask;
6071
6072 tls_mask = NULL;
6073 lgot_ents = elf_local_got_ents (ibfd);
6074 if (lgot_ents != NULL)
6075 {
6076 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6077 tls_mask = &lgot_masks[r_symndx];
6078 }
6079 *tls_maskp = tls_mask;
6080 }
6081 }
6082 return TRUE;
6083 }
6084
6085 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6086 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6087 type suitable for optimization, and 1 otherwise. */
6088
6089 static int
6090 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6091 Elf_Internal_Sym **locsymsp,
6092 const Elf_Internal_Rela *rel, bfd *ibfd)
6093 {
6094 unsigned long r_symndx;
6095 int next_r;
6096 struct elf_link_hash_entry *h;
6097 Elf_Internal_Sym *sym;
6098 asection *sec;
6099 bfd_vma off;
6100
6101 r_symndx = ELF64_R_SYM (rel->r_info);
6102 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6103 return 0;
6104
6105 if ((*tls_maskp != NULL && **tls_maskp != 0)
6106 || sec == NULL
6107 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6108 return 1;
6109
6110 /* Look inside a TOC section too. */
6111 if (h != NULL)
6112 {
6113 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6114 off = h->root.u.def.value;
6115 }
6116 else
6117 off = sym->st_value;
6118 off += rel->r_addend;
6119 BFD_ASSERT (off % 8 == 0);
6120 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6121 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6122 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6123 return 0;
6124 if (toc_symndx != NULL)
6125 *toc_symndx = r_symndx;
6126 if ((h == NULL
6127 || ((h->root.type == bfd_link_hash_defined
6128 || h->root.type == bfd_link_hash_defweak)
6129 && !h->def_dynamic))
6130 && (next_r == -1 || next_r == -2))
6131 return 1 - next_r;
6132 return 1;
6133 }
6134
6135 /* Adjust all global syms defined in opd sections. In gcc generated
6136 code for the old ABI, these will already have been done. */
6137
6138 static bfd_boolean
6139 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6140 {
6141 struct ppc_link_hash_entry *eh;
6142 asection *sym_sec;
6143 long *opd_adjust;
6144
6145 if (h->root.type == bfd_link_hash_indirect)
6146 return TRUE;
6147
6148 if (h->root.type == bfd_link_hash_warning)
6149 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6150
6151 if (h->root.type != bfd_link_hash_defined
6152 && h->root.type != bfd_link_hash_defweak)
6153 return TRUE;
6154
6155 eh = (struct ppc_link_hash_entry *) h;
6156 if (eh->adjust_done)
6157 return TRUE;
6158
6159 sym_sec = eh->elf.root.u.def.section;
6160 opd_adjust = get_opd_info (sym_sec);
6161 if (opd_adjust != NULL)
6162 {
6163 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6164 if (adjust == -1)
6165 {
6166 /* This entry has been deleted. */
6167 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6168 if (dsec == NULL)
6169 {
6170 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6171 if (elf_discarded_section (dsec))
6172 {
6173 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6174 break;
6175 }
6176 }
6177 eh->elf.root.u.def.value = 0;
6178 eh->elf.root.u.def.section = dsec;
6179 }
6180 else
6181 eh->elf.root.u.def.value += adjust;
6182 eh->adjust_done = 1;
6183 }
6184 return TRUE;
6185 }
6186
6187 /* Handles decrementing dynamic reloc counts for the reloc specified by
6188 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6189 have already been determined. */
6190
6191 static bfd_boolean
6192 dec_dynrel_count (bfd_vma r_info,
6193 asection *sec,
6194 struct bfd_link_info *info,
6195 Elf_Internal_Sym **local_syms,
6196 struct elf_link_hash_entry *h,
6197 asection *sym_sec)
6198 {
6199 enum elf_ppc64_reloc_type r_type;
6200 struct ppc_dyn_relocs *p;
6201 struct ppc_dyn_relocs **pp;
6202
6203 /* Can this reloc be dynamic? This switch, and later tests here
6204 should be kept in sync with the code in check_relocs. */
6205 r_type = ELF64_R_TYPE (r_info);
6206 switch (r_type)
6207 {
6208 default:
6209 return TRUE;
6210
6211 case R_PPC64_TPREL16:
6212 case R_PPC64_TPREL16_LO:
6213 case R_PPC64_TPREL16_HI:
6214 case R_PPC64_TPREL16_HA:
6215 case R_PPC64_TPREL16_DS:
6216 case R_PPC64_TPREL16_LO_DS:
6217 case R_PPC64_TPREL16_HIGHER:
6218 case R_PPC64_TPREL16_HIGHERA:
6219 case R_PPC64_TPREL16_HIGHEST:
6220 case R_PPC64_TPREL16_HIGHESTA:
6221 if (!info->shared)
6222 return TRUE;
6223
6224 case R_PPC64_TPREL64:
6225 case R_PPC64_DTPMOD64:
6226 case R_PPC64_DTPREL64:
6227 case R_PPC64_ADDR64:
6228 case R_PPC64_REL30:
6229 case R_PPC64_REL32:
6230 case R_PPC64_REL64:
6231 case R_PPC64_ADDR14:
6232 case R_PPC64_ADDR14_BRNTAKEN:
6233 case R_PPC64_ADDR14_BRTAKEN:
6234 case R_PPC64_ADDR16:
6235 case R_PPC64_ADDR16_DS:
6236 case R_PPC64_ADDR16_HA:
6237 case R_PPC64_ADDR16_HI:
6238 case R_PPC64_ADDR16_HIGHER:
6239 case R_PPC64_ADDR16_HIGHERA:
6240 case R_PPC64_ADDR16_HIGHEST:
6241 case R_PPC64_ADDR16_HIGHESTA:
6242 case R_PPC64_ADDR16_LO:
6243 case R_PPC64_ADDR16_LO_DS:
6244 case R_PPC64_ADDR24:
6245 case R_PPC64_ADDR32:
6246 case R_PPC64_UADDR16:
6247 case R_PPC64_UADDR32:
6248 case R_PPC64_UADDR64:
6249 case R_PPC64_TOC:
6250 break;
6251 }
6252
6253 if (local_syms != NULL)
6254 {
6255 unsigned long r_symndx;
6256 Elf_Internal_Sym *sym;
6257 bfd *ibfd = sec->owner;
6258
6259 r_symndx = ELF64_R_SYM (r_info);
6260 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6261 return FALSE;
6262 }
6263
6264 if ((info->shared
6265 && (MUST_BE_DYN_RELOC (r_type)
6266 || (h != NULL
6267 && (!info->symbolic
6268 || h->root.type == bfd_link_hash_defweak
6269 || !h->def_regular))))
6270 || (ELIMINATE_COPY_RELOCS
6271 && !info->shared
6272 && h != NULL
6273 && (h->root.type == bfd_link_hash_defweak
6274 || !h->def_regular)))
6275 ;
6276 else
6277 return TRUE;
6278
6279 if (h != NULL)
6280 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6281 else
6282 {
6283 if (sym_sec != NULL)
6284 {
6285 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6286 pp = (struct ppc_dyn_relocs **) vpp;
6287 }
6288 else
6289 {
6290 void *vpp = &elf_section_data (sec)->local_dynrel;
6291 pp = (struct ppc_dyn_relocs **) vpp;
6292 }
6293
6294 /* elf_gc_sweep may have already removed all dyn relocs associated
6295 with local syms for a given section. Don't report a dynreloc
6296 miscount. */
6297 if (*pp == NULL)
6298 return TRUE;
6299 }
6300
6301 while ((p = *pp) != NULL)
6302 {
6303 if (p->sec == sec)
6304 {
6305 if (!MUST_BE_DYN_RELOC (r_type))
6306 p->pc_count -= 1;
6307 p->count -= 1;
6308 if (p->count == 0)
6309 *pp = p->next;
6310 return TRUE;
6311 }
6312 pp = &p->next;
6313 }
6314
6315 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6316 sec->owner, sec);
6317 bfd_set_error (bfd_error_bad_value);
6318 return FALSE;
6319 }
6320
6321 /* Remove unused Official Procedure Descriptor entries. Currently we
6322 only remove those associated with functions in discarded link-once
6323 sections, or weakly defined functions that have been overridden. It
6324 would be possible to remove many more entries for statically linked
6325 applications. */
6326
6327 bfd_boolean
6328 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6329 bfd_boolean no_opd_opt,
6330 bfd_boolean non_overlapping)
6331 {
6332 bfd *ibfd;
6333 bfd_boolean some_edited = FALSE;
6334 asection *need_pad = NULL;
6335
6336 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6337 {
6338 asection *sec;
6339 Elf_Internal_Rela *relstart, *rel, *relend;
6340 Elf_Internal_Shdr *symtab_hdr;
6341 Elf_Internal_Sym *local_syms;
6342 struct elf_link_hash_entry **sym_hashes;
6343 bfd_vma offset;
6344 bfd_size_type amt;
6345 long *opd_adjust;
6346 bfd_boolean need_edit, add_aux_fields;
6347 bfd_size_type cnt_16b = 0;
6348
6349 sec = bfd_get_section_by_name (ibfd, ".opd");
6350 if (sec == NULL || sec->size == 0)
6351 continue;
6352
6353 amt = sec->size * sizeof (long) / 8;
6354 opd_adjust = get_opd_info (sec);
6355 if (opd_adjust == NULL)
6356 {
6357 /* check_relocs hasn't been called. Must be a ld -r link
6358 or --just-symbols object. */
6359 opd_adjust = bfd_alloc (obfd, amt);
6360 if (opd_adjust == NULL)
6361 return FALSE;
6362 ppc64_elf_section_data (sec)->u.opd_adjust = opd_adjust;
6363 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
6364 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6365 }
6366 memset (opd_adjust, 0, amt);
6367
6368 if (no_opd_opt)
6369 continue;
6370
6371 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6372 continue;
6373
6374 if (sec->output_section == bfd_abs_section_ptr)
6375 continue;
6376
6377 /* Look through the section relocs. */
6378 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6379 continue;
6380
6381 local_syms = NULL;
6382 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6383 sym_hashes = elf_sym_hashes (ibfd);
6384
6385 /* Read the relocations. */
6386 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6387 info->keep_memory);
6388 if (relstart == NULL)
6389 return FALSE;
6390
6391 /* First run through the relocs to check they are sane, and to
6392 determine whether we need to edit this opd section. */
6393 need_edit = FALSE;
6394 need_pad = sec;
6395 offset = 0;
6396 relend = relstart + sec->reloc_count;
6397 for (rel = relstart; rel < relend; )
6398 {
6399 enum elf_ppc64_reloc_type r_type;
6400 unsigned long r_symndx;
6401 asection *sym_sec;
6402 struct elf_link_hash_entry *h;
6403 Elf_Internal_Sym *sym;
6404
6405 /* .opd contains a regular array of 16 or 24 byte entries. We're
6406 only interested in the reloc pointing to a function entry
6407 point. */
6408 if (rel->r_offset != offset
6409 || rel + 1 >= relend
6410 || (rel + 1)->r_offset != offset + 8)
6411 {
6412 /* If someone messes with .opd alignment then after a
6413 "ld -r" we might have padding in the middle of .opd.
6414 Also, there's nothing to prevent someone putting
6415 something silly in .opd with the assembler. No .opd
6416 optimization for them! */
6417 broken_opd:
6418 (*_bfd_error_handler)
6419 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6420 need_edit = FALSE;
6421 break;
6422 }
6423
6424 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6425 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6426 {
6427 (*_bfd_error_handler)
6428 (_("%B: unexpected reloc type %u in .opd section"),
6429 ibfd, r_type);
6430 need_edit = FALSE;
6431 break;
6432 }
6433
6434 r_symndx = ELF64_R_SYM (rel->r_info);
6435 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6436 r_symndx, ibfd))
6437 goto error_ret;
6438
6439 if (sym_sec == NULL || sym_sec->owner == NULL)
6440 {
6441 const char *sym_name;
6442 if (h != NULL)
6443 sym_name = h->root.root.string;
6444 else
6445 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6446 sym_sec);
6447
6448 (*_bfd_error_handler)
6449 (_("%B: undefined sym `%s' in .opd section"),
6450 ibfd, sym_name);
6451 need_edit = FALSE;
6452 break;
6453 }
6454
6455 /* opd entries are always for functions defined in the
6456 current input bfd. If the symbol isn't defined in the
6457 input bfd, then we won't be using the function in this
6458 bfd; It must be defined in a linkonce section in another
6459 bfd, or is weak. It's also possible that we are
6460 discarding the function due to a linker script /DISCARD/,
6461 which we test for via the output_section. */
6462 if (sym_sec->owner != ibfd
6463 || sym_sec->output_section == bfd_abs_section_ptr)
6464 need_edit = TRUE;
6465
6466 rel += 2;
6467 if (rel == relend
6468 || (rel + 1 == relend && rel->r_offset == offset + 16))
6469 {
6470 if (sec->size == offset + 24)
6471 {
6472 need_pad = NULL;
6473 break;
6474 }
6475 if (rel == relend && sec->size == offset + 16)
6476 {
6477 cnt_16b++;
6478 break;
6479 }
6480 goto broken_opd;
6481 }
6482
6483 if (rel->r_offset == offset + 24)
6484 offset += 24;
6485 else if (rel->r_offset != offset + 16)
6486 goto broken_opd;
6487 else if (rel + 1 < relend
6488 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6489 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6490 {
6491 offset += 16;
6492 cnt_16b++;
6493 }
6494 else if (rel + 2 < relend
6495 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6496 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6497 {
6498 offset += 24;
6499 rel += 1;
6500 }
6501 else
6502 goto broken_opd;
6503 }
6504
6505 add_aux_fields = non_overlapping && cnt_16b > 0;
6506
6507 if (need_edit || add_aux_fields)
6508 {
6509 Elf_Internal_Rela *write_rel;
6510 bfd_byte *rptr, *wptr;
6511 bfd_byte *new_contents = NULL;
6512 bfd_boolean skip;
6513 long opd_ent_size;
6514
6515 /* This seems a waste of time as input .opd sections are all
6516 zeros as generated by gcc, but I suppose there's no reason
6517 this will always be so. We might start putting something in
6518 the third word of .opd entries. */
6519 if ((sec->flags & SEC_IN_MEMORY) == 0)
6520 {
6521 bfd_byte *loc;
6522 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6523 {
6524 if (loc != NULL)
6525 free (loc);
6526 error_ret:
6527 if (local_syms != NULL
6528 && symtab_hdr->contents != (unsigned char *) local_syms)
6529 free (local_syms);
6530 if (elf_section_data (sec)->relocs != relstart)
6531 free (relstart);
6532 return FALSE;
6533 }
6534 sec->contents = loc;
6535 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6536 }
6537
6538 elf_section_data (sec)->relocs = relstart;
6539
6540 new_contents = sec->contents;
6541 if (add_aux_fields)
6542 {
6543 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6544 if (new_contents == NULL)
6545 return FALSE;
6546 need_pad = FALSE;
6547 }
6548 wptr = new_contents;
6549 rptr = sec->contents;
6550
6551 write_rel = relstart;
6552 skip = FALSE;
6553 offset = 0;
6554 opd_ent_size = 0;
6555 for (rel = relstart; rel < relend; rel++)
6556 {
6557 unsigned long r_symndx;
6558 asection *sym_sec;
6559 struct elf_link_hash_entry *h;
6560 Elf_Internal_Sym *sym;
6561
6562 r_symndx = ELF64_R_SYM (rel->r_info);
6563 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6564 r_symndx, ibfd))
6565 goto error_ret;
6566
6567 if (rel->r_offset == offset)
6568 {
6569 struct ppc_link_hash_entry *fdh = NULL;
6570
6571 /* See if the .opd entry is full 24 byte or
6572 16 byte (with fd_aux entry overlapped with next
6573 fd_func). */
6574 opd_ent_size = 24;
6575 if ((rel + 2 == relend && sec->size == offset + 16)
6576 || (rel + 3 < relend
6577 && rel[2].r_offset == offset + 16
6578 && rel[3].r_offset == offset + 24
6579 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6580 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6581 opd_ent_size = 16;
6582
6583 if (h != NULL
6584 && h->root.root.string[0] == '.')
6585 {
6586 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6587 ppc_hash_table (info));
6588 if (fdh != NULL
6589 && fdh->elf.root.type != bfd_link_hash_defined
6590 && fdh->elf.root.type != bfd_link_hash_defweak)
6591 fdh = NULL;
6592 }
6593
6594 skip = (sym_sec->owner != ibfd
6595 || sym_sec->output_section == bfd_abs_section_ptr);
6596 if (skip)
6597 {
6598 if (fdh != NULL && sym_sec->owner == ibfd)
6599 {
6600 /* Arrange for the function descriptor sym
6601 to be dropped. */
6602 fdh->elf.root.u.def.value = 0;
6603 fdh->elf.root.u.def.section = sym_sec;
6604 }
6605 opd_adjust[rel->r_offset / 8] = -1;
6606 }
6607 else
6608 {
6609 /* We'll be keeping this opd entry. */
6610
6611 if (fdh != NULL)
6612 {
6613 /* Redefine the function descriptor symbol to
6614 this location in the opd section. It is
6615 necessary to update the value here rather
6616 than using an array of adjustments as we do
6617 for local symbols, because various places
6618 in the generic ELF code use the value
6619 stored in u.def.value. */
6620 fdh->elf.root.u.def.value = wptr - new_contents;
6621 fdh->adjust_done = 1;
6622 }
6623
6624 /* Local syms are a bit tricky. We could
6625 tweak them as they can be cached, but
6626 we'd need to look through the local syms
6627 for the function descriptor sym which we
6628 don't have at the moment. So keep an
6629 array of adjustments. */
6630 opd_adjust[rel->r_offset / 8]
6631 = (wptr - new_contents) - (rptr - sec->contents);
6632
6633 if (wptr != rptr)
6634 memcpy (wptr, rptr, opd_ent_size);
6635 wptr += opd_ent_size;
6636 if (add_aux_fields && opd_ent_size == 16)
6637 {
6638 memset (wptr, '\0', 8);
6639 wptr += 8;
6640 }
6641 }
6642 rptr += opd_ent_size;
6643 offset += opd_ent_size;
6644 }
6645
6646 if (skip)
6647 {
6648 if (!NO_OPD_RELOCS
6649 && !info->relocatable
6650 && !dec_dynrel_count (rel->r_info, sec, info,
6651 NULL, h, sym_sec))
6652 goto error_ret;
6653 }
6654 else
6655 {
6656 /* We need to adjust any reloc offsets to point to the
6657 new opd entries. While we're at it, we may as well
6658 remove redundant relocs. */
6659 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6660 if (write_rel != rel)
6661 memcpy (write_rel, rel, sizeof (*rel));
6662 ++write_rel;
6663 }
6664 }
6665
6666 sec->size = wptr - new_contents;
6667 sec->reloc_count = write_rel - relstart;
6668 if (add_aux_fields)
6669 {
6670 free (sec->contents);
6671 sec->contents = new_contents;
6672 }
6673
6674 /* Fudge the header size too, as this is used later in
6675 elf_bfd_final_link if we are emitting relocs. */
6676 elf_section_data (sec)->rel_hdr.sh_size
6677 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6678 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6679 some_edited = TRUE;
6680 }
6681 else if (elf_section_data (sec)->relocs != relstart)
6682 free (relstart);
6683
6684 if (local_syms != NULL
6685 && symtab_hdr->contents != (unsigned char *) local_syms)
6686 {
6687 if (!info->keep_memory)
6688 free (local_syms);
6689 else
6690 symtab_hdr->contents = (unsigned char *) local_syms;
6691 }
6692 }
6693
6694 if (some_edited)
6695 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6696
6697 /* If we are doing a final link and the last .opd entry is just 16 byte
6698 long, add a 8 byte padding after it. */
6699 if (need_pad != NULL && !info->relocatable)
6700 {
6701 bfd_byte *p;
6702
6703 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6704 {
6705 BFD_ASSERT (need_pad->size > 0);
6706
6707 p = bfd_malloc (need_pad->size + 8);
6708 if (p == NULL)
6709 return FALSE;
6710
6711 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6712 p, 0, need_pad->size))
6713 return FALSE;
6714
6715 need_pad->contents = p;
6716 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6717 }
6718 else
6719 {
6720 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6721 if (p == NULL)
6722 return FALSE;
6723
6724 need_pad->contents = p;
6725 }
6726
6727 memset (need_pad->contents + need_pad->size, 0, 8);
6728 need_pad->size += 8;
6729 }
6730
6731 return TRUE;
6732 }
6733
6734 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6735
6736 asection *
6737 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6738 {
6739 struct ppc_link_hash_table *htab;
6740
6741 htab = ppc_hash_table (info);
6742 if (htab->tls_get_addr != NULL)
6743 {
6744 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6745
6746 while (h->elf.root.type == bfd_link_hash_indirect
6747 || h->elf.root.type == bfd_link_hash_warning)
6748 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6749
6750 htab->tls_get_addr = h;
6751
6752 if (htab->tls_get_addr_fd == NULL
6753 && h->oh != NULL
6754 && h->oh->is_func_descriptor
6755 && (h->oh->elf.root.type == bfd_link_hash_defined
6756 || h->oh->elf.root.type == bfd_link_hash_defweak))
6757 htab->tls_get_addr_fd = h->oh;
6758 }
6759
6760 if (htab->tls_get_addr_fd != NULL)
6761 {
6762 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6763
6764 while (h->elf.root.type == bfd_link_hash_indirect
6765 || h->elf.root.type == bfd_link_hash_warning)
6766 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6767
6768 htab->tls_get_addr_fd = h;
6769 }
6770
6771 return _bfd_elf_tls_setup (obfd, info);
6772 }
6773
6774 /* Run through all the TLS relocs looking for optimization
6775 opportunities. The linker has been hacked (see ppc64elf.em) to do
6776 a preliminary section layout so that we know the TLS segment
6777 offsets. We can't optimize earlier because some optimizations need
6778 to know the tp offset, and we need to optimize before allocating
6779 dynamic relocations. */
6780
6781 bfd_boolean
6782 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6783 {
6784 bfd *ibfd;
6785 asection *sec;
6786 struct ppc_link_hash_table *htab;
6787
6788 if (info->relocatable || info->shared)
6789 return TRUE;
6790
6791 htab = ppc_hash_table (info);
6792 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6793 {
6794 Elf_Internal_Sym *locsyms = NULL;
6795 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6796 unsigned char *toc_ref = NULL;
6797
6798 /* Look at all the sections for this file, with TOC last. */
6799 for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next
6800 : ibfd->sections);
6801 sec != NULL;
6802 sec = (sec == toc ? NULL
6803 : sec->next == NULL ? toc
6804 : sec->next == toc && toc->next ? toc->next
6805 : sec->next))
6806 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6807 {
6808 Elf_Internal_Rela *relstart, *rel, *relend;
6809 int expecting_tls_get_addr;
6810 long toc_ref_index = 0;
6811
6812 /* Read the relocations. */
6813 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6814 info->keep_memory);
6815 if (relstart == NULL)
6816 return FALSE;
6817
6818 expecting_tls_get_addr = 0;
6819 relend = relstart + sec->reloc_count;
6820 for (rel = relstart; rel < relend; rel++)
6821 {
6822 enum elf_ppc64_reloc_type r_type;
6823 unsigned long r_symndx;
6824 struct elf_link_hash_entry *h;
6825 Elf_Internal_Sym *sym;
6826 asection *sym_sec;
6827 char *tls_mask;
6828 char tls_set, tls_clear, tls_type = 0;
6829 bfd_vma value;
6830 bfd_boolean ok_tprel, is_local;
6831
6832 r_symndx = ELF64_R_SYM (rel->r_info);
6833 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6834 r_symndx, ibfd))
6835 {
6836 err_free_rel:
6837 if (elf_section_data (sec)->relocs != relstart)
6838 free (relstart);
6839 if (toc_ref != NULL)
6840 free (toc_ref);
6841 if (locsyms != NULL
6842 && (elf_tdata (ibfd)->symtab_hdr.contents
6843 != (unsigned char *) locsyms))
6844 free (locsyms);
6845 return FALSE;
6846 }
6847
6848 if (h != NULL)
6849 {
6850 if (h->root.type != bfd_link_hash_defined
6851 && h->root.type != bfd_link_hash_defweak)
6852 continue;
6853 value = h->root.u.def.value;
6854 }
6855 else
6856 /* Symbols referenced by TLS relocs must be of type
6857 STT_TLS. So no need for .opd local sym adjust. */
6858 value = sym->st_value;
6859
6860 ok_tprel = FALSE;
6861 is_local = FALSE;
6862 if (h == NULL
6863 || !h->def_dynamic)
6864 {
6865 is_local = TRUE;
6866 value += sym_sec->output_offset;
6867 value += sym_sec->output_section->vma;
6868 value -= htab->elf.tls_sec->vma;
6869 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6870 < (bfd_vma) 1 << 32);
6871 }
6872
6873 r_type = ELF64_R_TYPE (rel->r_info);
6874 switch (r_type)
6875 {
6876 case R_PPC64_GOT_TLSLD16:
6877 case R_PPC64_GOT_TLSLD16_LO:
6878 case R_PPC64_GOT_TLSLD16_HI:
6879 case R_PPC64_GOT_TLSLD16_HA:
6880 /* These relocs should never be against a symbol
6881 defined in a shared lib. Leave them alone if
6882 that turns out to be the case. */
6883 ppc64_tlsld_got (ibfd)->refcount -= 1;
6884 if (!is_local)
6885 continue;
6886
6887 /* LD -> LE */
6888 tls_set = 0;
6889 tls_clear = TLS_LD;
6890 tls_type = TLS_TLS | TLS_LD;
6891 expecting_tls_get_addr = 1;
6892 break;
6893
6894 case R_PPC64_GOT_TLSGD16:
6895 case R_PPC64_GOT_TLSGD16_LO:
6896 case R_PPC64_GOT_TLSGD16_HI:
6897 case R_PPC64_GOT_TLSGD16_HA:
6898 if (ok_tprel)
6899 /* GD -> LE */
6900 tls_set = 0;
6901 else
6902 /* GD -> IE */
6903 tls_set = TLS_TLS | TLS_TPRELGD;
6904 tls_clear = TLS_GD;
6905 tls_type = TLS_TLS | TLS_GD;
6906 expecting_tls_get_addr = 1;
6907 break;
6908
6909 case R_PPC64_GOT_TPREL16_DS:
6910 case R_PPC64_GOT_TPREL16_LO_DS:
6911 case R_PPC64_GOT_TPREL16_HI:
6912 case R_PPC64_GOT_TPREL16_HA:
6913 expecting_tls_get_addr = 0;
6914 if (ok_tprel)
6915 {
6916 /* IE -> LE */
6917 tls_set = 0;
6918 tls_clear = TLS_TPREL;
6919 tls_type = TLS_TLS | TLS_TPREL;
6920 break;
6921 }
6922 else
6923 continue;
6924
6925 case R_PPC64_REL14:
6926 case R_PPC64_REL14_BRTAKEN:
6927 case R_PPC64_REL14_BRNTAKEN:
6928 case R_PPC64_REL24:
6929 if (h != NULL
6930 && (h == &htab->tls_get_addr->elf
6931 || h == &htab->tls_get_addr_fd->elf))
6932 {
6933 if (!expecting_tls_get_addr
6934 && rel != relstart
6935 && ((ELF64_R_TYPE (rel[-1].r_info)
6936 == R_PPC64_TOC16)
6937 || (ELF64_R_TYPE (rel[-1].r_info)
6938 == R_PPC64_TOC16_LO)))
6939 {
6940 /* Check for toc tls entries. */
6941 char *toc_tls;
6942 int retval;
6943
6944 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6945 rel - 1, ibfd);
6946 if (retval == 0)
6947 goto err_free_rel;
6948 if (retval > 1 && toc_tls != NULL)
6949 {
6950 expecting_tls_get_addr = 1;
6951 if (toc_ref != NULL)
6952 toc_ref[toc_ref_index] = 1;
6953 }
6954 }
6955
6956 if (expecting_tls_get_addr)
6957 {
6958 struct plt_entry *ent;
6959 for (ent = h->plt.plist; ent; ent = ent->next)
6960 if (ent->addend == 0)
6961 {
6962 if (ent->plt.refcount > 0)
6963 ent->plt.refcount -= 1;
6964 break;
6965 }
6966 }
6967 }
6968 expecting_tls_get_addr = 0;
6969 continue;
6970
6971 case R_PPC64_TOC16:
6972 case R_PPC64_TOC16_LO:
6973 case R_PPC64_TLS:
6974 expecting_tls_get_addr = 0;
6975 if (sym_sec == toc && toc != NULL)
6976 {
6977 /* Mark this toc entry as referenced by a TLS
6978 code sequence. We can do that now in the
6979 case of R_PPC64_TLS, and after checking for
6980 tls_get_addr for the TOC16 relocs. */
6981 if (toc_ref == NULL)
6982 {
6983 toc_ref = bfd_zmalloc (toc->size / 8);
6984 if (toc_ref == NULL)
6985 goto err_free_rel;
6986 }
6987 if (h != NULL)
6988 value = h->root.u.def.value;
6989 else
6990 value = sym->st_value;
6991 value += rel->r_addend;
6992 BFD_ASSERT (value < toc->size && value % 8 == 0);
6993 toc_ref_index = value / 8;
6994 if (r_type == R_PPC64_TLS)
6995 toc_ref[toc_ref_index] = 1;
6996 }
6997 continue;
6998
6999 case R_PPC64_TPREL64:
7000 expecting_tls_get_addr = 0;
7001 if (sec != toc
7002 || toc_ref == NULL
7003 || !toc_ref[rel->r_offset / 8])
7004 continue;
7005 if (ok_tprel)
7006 {
7007 /* IE -> LE */
7008 tls_set = TLS_EXPLICIT;
7009 tls_clear = TLS_TPREL;
7010 break;
7011 }
7012 else
7013 continue;
7014
7015 case R_PPC64_DTPMOD64:
7016 expecting_tls_get_addr = 0;
7017 if (sec != toc
7018 || toc_ref == NULL
7019 || !toc_ref[rel->r_offset / 8])
7020 continue;
7021 if (rel + 1 < relend
7022 && (rel[1].r_info
7023 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7024 && rel[1].r_offset == rel->r_offset + 8)
7025 {
7026 if (ok_tprel)
7027 /* GD -> LE */
7028 tls_set = TLS_EXPLICIT | TLS_GD;
7029 else
7030 /* GD -> IE */
7031 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7032 tls_clear = TLS_GD;
7033 }
7034 else
7035 {
7036 if (!is_local)
7037 continue;
7038
7039 /* LD -> LE */
7040 tls_set = TLS_EXPLICIT;
7041 tls_clear = TLS_LD;
7042 }
7043 break;
7044
7045 default:
7046 expecting_tls_get_addr = 0;
7047 continue;
7048 }
7049
7050 if ((tls_set & TLS_EXPLICIT) == 0)
7051 {
7052 struct got_entry *ent;
7053
7054 /* Adjust got entry for this reloc. */
7055 if (h != NULL)
7056 ent = h->got.glist;
7057 else
7058 ent = elf_local_got_ents (ibfd)[r_symndx];
7059
7060 for (; ent != NULL; ent = ent->next)
7061 if (ent->addend == rel->r_addend
7062 && ent->owner == ibfd
7063 && ent->tls_type == tls_type)
7064 break;
7065 if (ent == NULL)
7066 abort ();
7067
7068 if (tls_set == 0)
7069 {
7070 /* We managed to get rid of a got entry. */
7071 if (ent->got.refcount > 0)
7072 ent->got.refcount -= 1;
7073 }
7074 }
7075 else
7076 {
7077 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7078 we'll lose one or two dyn relocs. */
7079 if (!dec_dynrel_count (rel->r_info, sec, info,
7080 NULL, h, sym_sec))
7081 return FALSE;
7082
7083 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7084 {
7085 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7086 NULL, h, sym_sec))
7087 return FALSE;
7088 }
7089 }
7090
7091 *tls_mask |= tls_set;
7092 *tls_mask &= ~tls_clear;
7093 }
7094
7095 if (elf_section_data (sec)->relocs != relstart)
7096 free (relstart);
7097 }
7098
7099 if (toc_ref != NULL)
7100 free (toc_ref);
7101
7102 if (locsyms != NULL
7103 && (elf_tdata (ibfd)->symtab_hdr.contents
7104 != (unsigned char *) locsyms))
7105 {
7106 if (!info->keep_memory)
7107 free (locsyms);
7108 else
7109 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7110 }
7111 }
7112 return TRUE;
7113 }
7114
7115 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7116 the values of any global symbols in a toc section that has been
7117 edited. Globals in toc sections should be a rarity, so this function
7118 sets a flag if any are found in toc sections other than the one just
7119 edited, so that futher hash table traversals can be avoided. */
7120
7121 struct adjust_toc_info
7122 {
7123 asection *toc;
7124 unsigned long *skip;
7125 bfd_boolean global_toc_syms;
7126 };
7127
7128 static bfd_boolean
7129 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7130 {
7131 struct ppc_link_hash_entry *eh;
7132 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7133
7134 if (h->root.type == bfd_link_hash_indirect)
7135 return TRUE;
7136
7137 if (h->root.type == bfd_link_hash_warning)
7138 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7139
7140 if (h->root.type != bfd_link_hash_defined
7141 && h->root.type != bfd_link_hash_defweak)
7142 return TRUE;
7143
7144 eh = (struct ppc_link_hash_entry *) h;
7145 if (eh->adjust_done)
7146 return TRUE;
7147
7148 if (eh->elf.root.u.def.section == toc_inf->toc)
7149 {
7150 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7151 if (skip != (unsigned long) -1)
7152 eh->elf.root.u.def.value -= skip;
7153 else
7154 {
7155 (*_bfd_error_handler)
7156 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7157 eh->elf.root.u.def.section = &bfd_abs_section;
7158 eh->elf.root.u.def.value = 0;
7159 }
7160 eh->adjust_done = 1;
7161 }
7162 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7163 toc_inf->global_toc_syms = TRUE;
7164
7165 return TRUE;
7166 }
7167
7168 /* Examine all relocs referencing .toc sections in order to remove
7169 unused .toc entries. */
7170
7171 bfd_boolean
7172 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7173 {
7174 bfd *ibfd;
7175 struct adjust_toc_info toc_inf;
7176
7177 toc_inf.global_toc_syms = TRUE;
7178 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7179 {
7180 asection *toc, *sec;
7181 Elf_Internal_Shdr *symtab_hdr;
7182 Elf_Internal_Sym *local_syms;
7183 struct elf_link_hash_entry **sym_hashes;
7184 Elf_Internal_Rela *relstart, *rel;
7185 unsigned long *skip, *drop;
7186 unsigned char *used;
7187 unsigned char *keep, last, some_unused;
7188
7189 toc = bfd_get_section_by_name (ibfd, ".toc");
7190 if (toc == NULL
7191 || toc->size == 0
7192 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7193 || elf_discarded_section (toc))
7194 continue;
7195
7196 local_syms = NULL;
7197 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7198 sym_hashes = elf_sym_hashes (ibfd);
7199
7200 /* Look at sections dropped from the final link. */
7201 skip = NULL;
7202 relstart = NULL;
7203 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7204 {
7205 if (sec->reloc_count == 0
7206 || !elf_discarded_section (sec)
7207 || get_opd_info (sec)
7208 || (sec->flags & SEC_ALLOC) == 0
7209 || (sec->flags & SEC_DEBUGGING) != 0)
7210 continue;
7211
7212 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7213 if (relstart == NULL)
7214 goto error_ret;
7215
7216 /* Run through the relocs to see which toc entries might be
7217 unused. */
7218 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7219 {
7220 enum elf_ppc64_reloc_type r_type;
7221 unsigned long r_symndx;
7222 asection *sym_sec;
7223 struct elf_link_hash_entry *h;
7224 Elf_Internal_Sym *sym;
7225 bfd_vma val;
7226
7227 r_type = ELF64_R_TYPE (rel->r_info);
7228 switch (r_type)
7229 {
7230 default:
7231 continue;
7232
7233 case R_PPC64_TOC16:
7234 case R_PPC64_TOC16_LO:
7235 case R_PPC64_TOC16_HI:
7236 case R_PPC64_TOC16_HA:
7237 case R_PPC64_TOC16_DS:
7238 case R_PPC64_TOC16_LO_DS:
7239 break;
7240 }
7241
7242 r_symndx = ELF64_R_SYM (rel->r_info);
7243 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7244 r_symndx, ibfd))
7245 goto error_ret;
7246
7247 if (sym_sec != toc)
7248 continue;
7249
7250 if (h != NULL)
7251 val = h->root.u.def.value;
7252 else
7253 val = sym->st_value;
7254 val += rel->r_addend;
7255
7256 if (val >= toc->size)
7257 continue;
7258
7259 /* Anything in the toc ought to be aligned to 8 bytes.
7260 If not, don't mark as unused. */
7261 if (val & 7)
7262 continue;
7263
7264 if (skip == NULL)
7265 {
7266 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7267 if (skip == NULL)
7268 goto error_ret;
7269 }
7270
7271 skip[val >> 3] = 1;
7272 }
7273
7274 if (elf_section_data (sec)->relocs != relstart)
7275 free (relstart);
7276 }
7277
7278 if (skip == NULL)
7279 continue;
7280
7281 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7282 if (used == NULL)
7283 {
7284 error_ret:
7285 if (local_syms != NULL
7286 && symtab_hdr->contents != (unsigned char *) local_syms)
7287 free (local_syms);
7288 if (sec != NULL
7289 && relstart != NULL
7290 && elf_section_data (sec)->relocs != relstart)
7291 free (relstart);
7292 if (skip != NULL)
7293 free (skip);
7294 return FALSE;
7295 }
7296
7297 /* Now check all kept sections that might reference the toc.
7298 Check the toc itself last. */
7299 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7300 : ibfd->sections);
7301 sec != NULL;
7302 sec = (sec == toc ? NULL
7303 : sec->next == NULL ? toc
7304 : sec->next == toc && toc->next ? toc->next
7305 : sec->next))
7306 {
7307 int repeat;
7308
7309 if (sec->reloc_count == 0
7310 || elf_discarded_section (sec)
7311 || get_opd_info (sec)
7312 || (sec->flags & SEC_ALLOC) == 0
7313 || (sec->flags & SEC_DEBUGGING) != 0)
7314 continue;
7315
7316 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7317 if (relstart == NULL)
7318 goto error_ret;
7319
7320 /* Mark toc entries referenced as used. */
7321 repeat = 0;
7322 do
7323 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7324 {
7325 enum elf_ppc64_reloc_type r_type;
7326 unsigned long r_symndx;
7327 asection *sym_sec;
7328 struct elf_link_hash_entry *h;
7329 Elf_Internal_Sym *sym;
7330 bfd_vma val;
7331
7332 r_type = ELF64_R_TYPE (rel->r_info);
7333 switch (r_type)
7334 {
7335 case R_PPC64_TOC16:
7336 case R_PPC64_TOC16_LO:
7337 case R_PPC64_TOC16_HI:
7338 case R_PPC64_TOC16_HA:
7339 case R_PPC64_TOC16_DS:
7340 case R_PPC64_TOC16_LO_DS:
7341 /* In case we're taking addresses of toc entries. */
7342 case R_PPC64_ADDR64:
7343 break;
7344
7345 default:
7346 continue;
7347 }
7348
7349 r_symndx = ELF64_R_SYM (rel->r_info);
7350 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7351 r_symndx, ibfd))
7352 {
7353 free (used);
7354 goto error_ret;
7355 }
7356
7357 if (sym_sec != toc)
7358 continue;
7359
7360 if (h != NULL)
7361 val = h->root.u.def.value;
7362 else
7363 val = sym->st_value;
7364 val += rel->r_addend;
7365
7366 if (val >= toc->size)
7367 continue;
7368
7369 /* For the toc section, we only mark as used if
7370 this entry itself isn't unused. */
7371 if (sec == toc
7372 && !used[val >> 3]
7373 && (used[rel->r_offset >> 3]
7374 || !skip[rel->r_offset >> 3]))
7375 /* Do all the relocs again, to catch reference
7376 chains. */
7377 repeat = 1;
7378
7379 used[val >> 3] = 1;
7380 }
7381 while (repeat);
7382 }
7383
7384 /* Merge the used and skip arrays. Assume that TOC
7385 doublewords not appearing as either used or unused belong
7386 to to an entry more than one doubleword in size. */
7387 for (drop = skip, keep = used, last = 0, some_unused = 0;
7388 drop < skip + (toc->size + 7) / 8;
7389 ++drop, ++keep)
7390 {
7391 if (*keep)
7392 {
7393 *drop = 0;
7394 last = 0;
7395 }
7396 else if (*drop)
7397 {
7398 some_unused = 1;
7399 last = 1;
7400 }
7401 else
7402 *drop = last;
7403 }
7404
7405 free (used);
7406
7407 if (some_unused)
7408 {
7409 bfd_byte *contents, *src;
7410 unsigned long off;
7411
7412 /* Shuffle the toc contents, and at the same time convert the
7413 skip array from booleans into offsets. */
7414 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7415 goto error_ret;
7416
7417 elf_section_data (toc)->this_hdr.contents = contents;
7418
7419 for (src = contents, off = 0, drop = skip;
7420 src < contents + toc->size;
7421 src += 8, ++drop)
7422 {
7423 if (*drop)
7424 {
7425 *drop = (unsigned long) -1;
7426 off += 8;
7427 }
7428 else if (off != 0)
7429 {
7430 *drop = off;
7431 memcpy (src - off, src, 8);
7432 }
7433 }
7434 toc->rawsize = toc->size;
7435 toc->size = src - contents - off;
7436
7437 if (toc->reloc_count != 0)
7438 {
7439 Elf_Internal_Rela *wrel;
7440 bfd_size_type sz;
7441
7442 /* Read toc relocs. */
7443 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7444 TRUE);
7445 if (relstart == NULL)
7446 goto error_ret;
7447
7448 /* Remove unused toc relocs, and adjust those we keep. */
7449 wrel = relstart;
7450 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7451 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7452 {
7453 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7454 wrel->r_info = rel->r_info;
7455 wrel->r_addend = rel->r_addend;
7456 ++wrel;
7457 }
7458 else if (!dec_dynrel_count (rel->r_info, toc, info,
7459 &local_syms, NULL, NULL))
7460 goto error_ret;
7461
7462 toc->reloc_count = wrel - relstart;
7463 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7464 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7465 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7466 }
7467
7468 /* Adjust addends for relocs against the toc section sym. */
7469 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7470 {
7471 if (sec->reloc_count == 0
7472 || elf_discarded_section (sec))
7473 continue;
7474
7475 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7476 TRUE);
7477 if (relstart == NULL)
7478 goto error_ret;
7479
7480 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7481 {
7482 enum elf_ppc64_reloc_type r_type;
7483 unsigned long r_symndx;
7484 asection *sym_sec;
7485 struct elf_link_hash_entry *h;
7486 Elf_Internal_Sym *sym;
7487
7488 r_type = ELF64_R_TYPE (rel->r_info);
7489 switch (r_type)
7490 {
7491 default:
7492 continue;
7493
7494 case R_PPC64_TOC16:
7495 case R_PPC64_TOC16_LO:
7496 case R_PPC64_TOC16_HI:
7497 case R_PPC64_TOC16_HA:
7498 case R_PPC64_TOC16_DS:
7499 case R_PPC64_TOC16_LO_DS:
7500 case R_PPC64_ADDR64:
7501 break;
7502 }
7503
7504 r_symndx = ELF64_R_SYM (rel->r_info);
7505 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7506 r_symndx, ibfd))
7507 goto error_ret;
7508
7509 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7510 continue;
7511
7512 rel->r_addend -= skip[rel->r_addend >> 3];
7513 }
7514 }
7515
7516 /* We shouldn't have local or global symbols defined in the TOC,
7517 but handle them anyway. */
7518 if (local_syms != NULL)
7519 {
7520 Elf_Internal_Sym *sym;
7521
7522 for (sym = local_syms;
7523 sym < local_syms + symtab_hdr->sh_info;
7524 ++sym)
7525 if (sym->st_shndx != SHN_UNDEF
7526 && (sym->st_shndx < SHN_LORESERVE
7527 || sym->st_shndx > SHN_HIRESERVE)
7528 && sym->st_value != 0
7529 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7530 {
7531 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7532 sym->st_value -= skip[sym->st_value >> 3];
7533 else
7534 {
7535 (*_bfd_error_handler)
7536 (_("%s defined in removed toc entry"),
7537 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7538 NULL));
7539 sym->st_value = 0;
7540 sym->st_shndx = SHN_ABS;
7541 }
7542 symtab_hdr->contents = (unsigned char *) local_syms;
7543 }
7544 }
7545
7546 /* Finally, adjust any global syms defined in the toc. */
7547 if (toc_inf.global_toc_syms)
7548 {
7549 toc_inf.toc = toc;
7550 toc_inf.skip = skip;
7551 toc_inf.global_toc_syms = FALSE;
7552 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7553 &toc_inf);
7554 }
7555 }
7556
7557 if (local_syms != NULL
7558 && symtab_hdr->contents != (unsigned char *) local_syms)
7559 {
7560 if (!info->keep_memory)
7561 free (local_syms);
7562 else
7563 symtab_hdr->contents = (unsigned char *) local_syms;
7564 }
7565 free (skip);
7566 }
7567
7568 return TRUE;
7569 }
7570
7571 /* Allocate space in .plt, .got and associated reloc sections for
7572 dynamic relocs. */
7573
7574 static bfd_boolean
7575 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7576 {
7577 struct bfd_link_info *info;
7578 struct ppc_link_hash_table *htab;
7579 asection *s;
7580 struct ppc_link_hash_entry *eh;
7581 struct ppc_dyn_relocs *p;
7582 struct got_entry *gent;
7583
7584 if (h->root.type == bfd_link_hash_indirect)
7585 return TRUE;
7586
7587 if (h->root.type == bfd_link_hash_warning)
7588 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7589
7590 info = (struct bfd_link_info *) inf;
7591 htab = ppc_hash_table (info);
7592
7593 if (htab->elf.dynamic_sections_created
7594 && h->dynindx != -1
7595 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7596 {
7597 struct plt_entry *pent;
7598 bfd_boolean doneone = FALSE;
7599 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7600 if (pent->plt.refcount > 0)
7601 {
7602 /* If this is the first .plt entry, make room for the special
7603 first entry. */
7604 s = htab->plt;
7605 if (s->size == 0)
7606 s->size += PLT_INITIAL_ENTRY_SIZE;
7607
7608 pent->plt.offset = s->size;
7609
7610 /* Make room for this entry. */
7611 s->size += PLT_ENTRY_SIZE;
7612
7613 /* Make room for the .glink code. */
7614 s = htab->glink;
7615 if (s->size == 0)
7616 s->size += GLINK_CALL_STUB_SIZE;
7617 /* We need bigger stubs past index 32767. */
7618 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7619 s->size += 4;
7620 s->size += 2*4;
7621
7622 /* We also need to make an entry in the .rela.plt section. */
7623 s = htab->relplt;
7624 s->size += sizeof (Elf64_External_Rela);
7625 doneone = TRUE;
7626 }
7627 else
7628 pent->plt.offset = (bfd_vma) -1;
7629 if (!doneone)
7630 {
7631 h->plt.plist = NULL;
7632 h->needs_plt = 0;
7633 }
7634 }
7635 else
7636 {
7637 h->plt.plist = NULL;
7638 h->needs_plt = 0;
7639 }
7640
7641 eh = (struct ppc_link_hash_entry *) h;
7642 /* Run through the TLS GD got entries first if we're changing them
7643 to TPREL. */
7644 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7645 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7646 if (gent->got.refcount > 0
7647 && (gent->tls_type & TLS_GD) != 0)
7648 {
7649 /* This was a GD entry that has been converted to TPREL. If
7650 there happens to be a TPREL entry we can use that one. */
7651 struct got_entry *ent;
7652 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7653 if (ent->got.refcount > 0
7654 && (ent->tls_type & TLS_TPREL) != 0
7655 && ent->addend == gent->addend
7656 && ent->owner == gent->owner)
7657 {
7658 gent->got.refcount = 0;
7659 break;
7660 }
7661
7662 /* If not, then we'll be using our own TPREL entry. */
7663 if (gent->got.refcount != 0)
7664 gent->tls_type = TLS_TLS | TLS_TPREL;
7665 }
7666
7667 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7668 if (gent->got.refcount > 0)
7669 {
7670 bfd_boolean dyn;
7671
7672 /* Make sure this symbol is output as a dynamic symbol.
7673 Undefined weak syms won't yet be marked as dynamic,
7674 nor will all TLS symbols. */
7675 if (h->dynindx == -1
7676 && !h->forced_local)
7677 {
7678 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7679 return FALSE;
7680 }
7681
7682 if ((gent->tls_type & TLS_LD) != 0
7683 && !h->def_dynamic)
7684 {
7685 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7686 continue;
7687 }
7688
7689 s = ppc64_elf_tdata (gent->owner)->got;
7690 gent->got.offset = s->size;
7691 s->size
7692 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7693 dyn = htab->elf.dynamic_sections_created;
7694 if ((info->shared
7695 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7696 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7697 || h->root.type != bfd_link_hash_undefweak))
7698 ppc64_elf_tdata (gent->owner)->relgot->size
7699 += (gent->tls_type & eh->tls_mask & TLS_GD
7700 ? 2 * sizeof (Elf64_External_Rela)
7701 : sizeof (Elf64_External_Rela));
7702 }
7703 else
7704 gent->got.offset = (bfd_vma) -1;
7705
7706 if (eh->dyn_relocs == NULL)
7707 return TRUE;
7708
7709 /* In the shared -Bsymbolic case, discard space allocated for
7710 dynamic pc-relative relocs against symbols which turn out to be
7711 defined in regular objects. For the normal shared case, discard
7712 space for relocs that have become local due to symbol visibility
7713 changes. */
7714
7715 if (info->shared)
7716 {
7717 /* Relocs that use pc_count are those that appear on a call insn,
7718 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7719 generated via assembly. We want calls to protected symbols to
7720 resolve directly to the function rather than going via the plt.
7721 If people want function pointer comparisons to work as expected
7722 then they should avoid writing weird assembly. */
7723 if (SYMBOL_CALLS_LOCAL (info, h))
7724 {
7725 struct ppc_dyn_relocs **pp;
7726
7727 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7728 {
7729 p->count -= p->pc_count;
7730 p->pc_count = 0;
7731 if (p->count == 0)
7732 *pp = p->next;
7733 else
7734 pp = &p->next;
7735 }
7736 }
7737
7738 /* Also discard relocs on undefined weak syms with non-default
7739 visibility. */
7740 if (eh->dyn_relocs != NULL
7741 && h->root.type == bfd_link_hash_undefweak)
7742 {
7743 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7744 eh->dyn_relocs = NULL;
7745
7746 /* Make sure this symbol is output as a dynamic symbol.
7747 Undefined weak syms won't yet be marked as dynamic. */
7748 else if (h->dynindx == -1
7749 && !h->forced_local)
7750 {
7751 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7752 return FALSE;
7753 }
7754 }
7755 }
7756 else if (ELIMINATE_COPY_RELOCS)
7757 {
7758 /* For the non-shared case, discard space for relocs against
7759 symbols which turn out to need copy relocs or are not
7760 dynamic. */
7761
7762 if (!h->non_got_ref
7763 && h->def_dynamic
7764 && !h->def_regular)
7765 {
7766 /* Make sure this symbol is output as a dynamic symbol.
7767 Undefined weak syms won't yet be marked as dynamic. */
7768 if (h->dynindx == -1
7769 && !h->forced_local)
7770 {
7771 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7772 return FALSE;
7773 }
7774
7775 /* If that succeeded, we know we'll be keeping all the
7776 relocs. */
7777 if (h->dynindx != -1)
7778 goto keep;
7779 }
7780
7781 eh->dyn_relocs = NULL;
7782
7783 keep: ;
7784 }
7785
7786 /* Finally, allocate space. */
7787 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7788 {
7789 asection *sreloc = elf_section_data (p->sec)->sreloc;
7790 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7791 }
7792
7793 return TRUE;
7794 }
7795
7796 /* Find any dynamic relocs that apply to read-only sections. */
7797
7798 static bfd_boolean
7799 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7800 {
7801 struct ppc_link_hash_entry *eh;
7802 struct ppc_dyn_relocs *p;
7803
7804 if (h->root.type == bfd_link_hash_warning)
7805 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7806
7807 eh = (struct ppc_link_hash_entry *) h;
7808 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7809 {
7810 asection *s = p->sec->output_section;
7811
7812 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7813 {
7814 struct bfd_link_info *info = inf;
7815
7816 info->flags |= DF_TEXTREL;
7817
7818 /* Not an error, just cut short the traversal. */
7819 return FALSE;
7820 }
7821 }
7822 return TRUE;
7823 }
7824
7825 /* Set the sizes of the dynamic sections. */
7826
7827 static bfd_boolean
7828 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7829 struct bfd_link_info *info)
7830 {
7831 struct ppc_link_hash_table *htab;
7832 bfd *dynobj;
7833 asection *s;
7834 bfd_boolean relocs;
7835 bfd *ibfd;
7836
7837 htab = ppc_hash_table (info);
7838 dynobj = htab->elf.dynobj;
7839 if (dynobj == NULL)
7840 abort ();
7841
7842 if (htab->elf.dynamic_sections_created)
7843 {
7844 /* Set the contents of the .interp section to the interpreter. */
7845 if (info->executable)
7846 {
7847 s = bfd_get_section_by_name (dynobj, ".interp");
7848 if (s == NULL)
7849 abort ();
7850 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7851 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7852 }
7853 }
7854
7855 /* Set up .got offsets for local syms, and space for local dynamic
7856 relocs. */
7857 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7858 {
7859 struct got_entry **lgot_ents;
7860 struct got_entry **end_lgot_ents;
7861 char *lgot_masks;
7862 bfd_size_type locsymcount;
7863 Elf_Internal_Shdr *symtab_hdr;
7864 asection *srel;
7865
7866 if (!is_ppc64_elf_target (ibfd->xvec))
7867 continue;
7868
7869 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7870 {
7871 s = ppc64_elf_tdata (ibfd)->got;
7872 ppc64_tlsld_got (ibfd)->offset = s->size;
7873 s->size += 16;
7874 if (info->shared)
7875 {
7876 srel = ppc64_elf_tdata (ibfd)->relgot;
7877 srel->size += sizeof (Elf64_External_Rela);
7878 }
7879 }
7880 else
7881 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7882
7883 for (s = ibfd->sections; s != NULL; s = s->next)
7884 {
7885 struct ppc_dyn_relocs *p;
7886
7887 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7888 {
7889 if (!bfd_is_abs_section (p->sec)
7890 && bfd_is_abs_section (p->sec->output_section))
7891 {
7892 /* Input section has been discarded, either because
7893 it is a copy of a linkonce section or due to
7894 linker script /DISCARD/, so we'll be discarding
7895 the relocs too. */
7896 }
7897 else if (p->count != 0)
7898 {
7899 srel = elf_section_data (p->sec)->sreloc;
7900 srel->size += p->count * sizeof (Elf64_External_Rela);
7901 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7902 info->flags |= DF_TEXTREL;
7903 }
7904 }
7905 }
7906
7907 lgot_ents = elf_local_got_ents (ibfd);
7908 if (!lgot_ents)
7909 continue;
7910
7911 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7912 locsymcount = symtab_hdr->sh_info;
7913 end_lgot_ents = lgot_ents + locsymcount;
7914 lgot_masks = (char *) end_lgot_ents;
7915 s = ppc64_elf_tdata (ibfd)->got;
7916 srel = ppc64_elf_tdata (ibfd)->relgot;
7917 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7918 {
7919 struct got_entry *ent;
7920
7921 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7922 if (ent->got.refcount > 0)
7923 {
7924 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7925 {
7926 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7927 {
7928 ppc64_tlsld_got (ibfd)->offset = s->size;
7929 s->size += 16;
7930 if (info->shared)
7931 srel->size += sizeof (Elf64_External_Rela);
7932 }
7933 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7934 }
7935 else
7936 {
7937 ent->got.offset = s->size;
7938 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7939 {
7940 s->size += 16;
7941 if (info->shared)
7942 srel->size += 2 * sizeof (Elf64_External_Rela);
7943 }
7944 else
7945 {
7946 s->size += 8;
7947 if (info->shared)
7948 srel->size += sizeof (Elf64_External_Rela);
7949 }
7950 }
7951 }
7952 else
7953 ent->got.offset = (bfd_vma) -1;
7954 }
7955 }
7956
7957 /* Allocate global sym .plt and .got entries, and space for global
7958 sym dynamic relocs. */
7959 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7960
7961 /* We now have determined the sizes of the various dynamic sections.
7962 Allocate memory for them. */
7963 relocs = FALSE;
7964 for (s = dynobj->sections; s != NULL; s = s->next)
7965 {
7966 if ((s->flags & SEC_LINKER_CREATED) == 0)
7967 continue;
7968
7969 if (s == htab->brlt || s == htab->relbrlt)
7970 /* These haven't been allocated yet; don't strip. */
7971 continue;
7972 else if (s == htab->got
7973 || s == htab->plt
7974 || s == htab->glink
7975 || s == htab->dynbss)
7976 {
7977 /* Strip this section if we don't need it; see the
7978 comment below. */
7979 }
7980 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7981 {
7982 if (s->size != 0)
7983 {
7984 if (s != htab->relplt)
7985 relocs = TRUE;
7986
7987 /* We use the reloc_count field as a counter if we need
7988 to copy relocs into the output file. */
7989 s->reloc_count = 0;
7990 }
7991 }
7992 else
7993 {
7994 /* It's not one of our sections, so don't allocate space. */
7995 continue;
7996 }
7997
7998 if (s->size == 0)
7999 {
8000 /* If we don't need this section, strip it from the
8001 output file. This is mostly to handle .rela.bss and
8002 .rela.plt. We must create both sections in
8003 create_dynamic_sections, because they must be created
8004 before the linker maps input sections to output
8005 sections. The linker does that before
8006 adjust_dynamic_symbol is called, and it is that
8007 function which decides whether anything needs to go
8008 into these sections. */
8009 s->flags |= SEC_EXCLUDE;
8010 continue;
8011 }
8012
8013 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8014 continue;
8015
8016 /* Allocate memory for the section contents. We use bfd_zalloc
8017 here in case unused entries are not reclaimed before the
8018 section's contents are written out. This should not happen,
8019 but this way if it does we get a R_PPC64_NONE reloc in .rela
8020 sections instead of garbage.
8021 We also rely on the section contents being zero when writing
8022 the GOT. */
8023 s->contents = bfd_zalloc (dynobj, s->size);
8024 if (s->contents == NULL)
8025 return FALSE;
8026 }
8027
8028 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8029 {
8030 if (!is_ppc64_elf_target (ibfd->xvec))
8031 continue;
8032
8033 s = ppc64_elf_tdata (ibfd)->got;
8034 if (s != NULL && s != htab->got)
8035 {
8036 if (s->size == 0)
8037 s->flags |= SEC_EXCLUDE;
8038 else
8039 {
8040 s->contents = bfd_zalloc (ibfd, s->size);
8041 if (s->contents == NULL)
8042 return FALSE;
8043 }
8044 }
8045 s = ppc64_elf_tdata (ibfd)->relgot;
8046 if (s != NULL)
8047 {
8048 if (s->size == 0)
8049 s->flags |= SEC_EXCLUDE;
8050 else
8051 {
8052 s->contents = bfd_zalloc (ibfd, s->size);
8053 if (s->contents == NULL)
8054 return FALSE;
8055 relocs = TRUE;
8056 s->reloc_count = 0;
8057 }
8058 }
8059 }
8060
8061 if (htab->elf.dynamic_sections_created)
8062 {
8063 /* Add some entries to the .dynamic section. We fill in the
8064 values later, in ppc64_elf_finish_dynamic_sections, but we
8065 must add the entries now so that we get the correct size for
8066 the .dynamic section. The DT_DEBUG entry is filled in by the
8067 dynamic linker and used by the debugger. */
8068 #define add_dynamic_entry(TAG, VAL) \
8069 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8070
8071 if (info->executable)
8072 {
8073 if (!add_dynamic_entry (DT_DEBUG, 0))
8074 return FALSE;
8075 }
8076
8077 if (htab->plt != NULL && htab->plt->size != 0)
8078 {
8079 if (!add_dynamic_entry (DT_PLTGOT, 0)
8080 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8081 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8082 || !add_dynamic_entry (DT_JMPREL, 0)
8083 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8084 return FALSE;
8085 }
8086
8087 if (NO_OPD_RELOCS)
8088 {
8089 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8090 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8091 return FALSE;
8092 }
8093
8094 if (relocs)
8095 {
8096 if (!add_dynamic_entry (DT_RELA, 0)
8097 || !add_dynamic_entry (DT_RELASZ, 0)
8098 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8099 return FALSE;
8100
8101 /* If any dynamic relocs apply to a read-only section,
8102 then we need a DT_TEXTREL entry. */
8103 if ((info->flags & DF_TEXTREL) == 0)
8104 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8105
8106 if ((info->flags & DF_TEXTREL) != 0)
8107 {
8108 if (!add_dynamic_entry (DT_TEXTREL, 0))
8109 return FALSE;
8110 }
8111 }
8112 }
8113 #undef add_dynamic_entry
8114
8115 return TRUE;
8116 }
8117
8118 /* Determine the type of stub needed, if any, for a call. */
8119
8120 static inline enum ppc_stub_type
8121 ppc_type_of_stub (asection *input_sec,
8122 const Elf_Internal_Rela *rel,
8123 struct ppc_link_hash_entry **hash,
8124 bfd_vma destination)
8125 {
8126 struct ppc_link_hash_entry *h = *hash;
8127 bfd_vma location;
8128 bfd_vma branch_offset;
8129 bfd_vma max_branch_offset;
8130 enum elf_ppc64_reloc_type r_type;
8131
8132 if (h != NULL)
8133 {
8134 struct ppc_link_hash_entry *fdh = h;
8135 if (fdh->oh != NULL
8136 && fdh->oh->is_func_descriptor)
8137 fdh = fdh->oh;
8138
8139 if (fdh->elf.dynindx != -1)
8140 {
8141 struct plt_entry *ent;
8142
8143 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8144 if (ent->addend == rel->r_addend
8145 && ent->plt.offset != (bfd_vma) -1)
8146 {
8147 *hash = fdh;
8148 return ppc_stub_plt_call;
8149 }
8150 }
8151
8152 /* Here, we know we don't have a plt entry. If we don't have a
8153 either a defined function descriptor or a defined entry symbol
8154 in a regular object file, then it is pointless trying to make
8155 any other type of stub. */
8156 if (!((fdh->elf.root.type == bfd_link_hash_defined
8157 || fdh->elf.root.type == bfd_link_hash_defweak)
8158 && fdh->elf.root.u.def.section->output_section != NULL)
8159 && !((h->elf.root.type == bfd_link_hash_defined
8160 || h->elf.root.type == bfd_link_hash_defweak)
8161 && h->elf.root.u.def.section->output_section != NULL))
8162 return ppc_stub_none;
8163 }
8164
8165 /* Determine where the call point is. */
8166 location = (input_sec->output_offset
8167 + input_sec->output_section->vma
8168 + rel->r_offset);
8169
8170 branch_offset = destination - location;
8171 r_type = ELF64_R_TYPE (rel->r_info);
8172
8173 /* Determine if a long branch stub is needed. */
8174 max_branch_offset = 1 << 25;
8175 if (r_type != R_PPC64_REL24)
8176 max_branch_offset = 1 << 15;
8177
8178 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8179 /* We need a stub. Figure out whether a long_branch or plt_branch
8180 is needed later. */
8181 return ppc_stub_long_branch;
8182
8183 return ppc_stub_none;
8184 }
8185
8186 /* Build a .plt call stub. */
8187
8188 static inline bfd_byte *
8189 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8190 {
8191 #define PPC_LO(v) ((v) & 0xffff)
8192 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8193 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8194
8195 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8196 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8197 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8198 if (PPC_HA (offset + 8) != PPC_HA (offset))
8199 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8200 offset += 8;
8201 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
8202 if (PPC_HA (offset + 8) != PPC_HA (offset))
8203 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8204 offset += 8;
8205 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8206 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8207 bfd_put_32 (obfd, BCTR, p), p += 4;
8208 return p;
8209 }
8210
8211 static bfd_boolean
8212 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8213 {
8214 struct ppc_stub_hash_entry *stub_entry;
8215 struct ppc_branch_hash_entry *br_entry;
8216 struct bfd_link_info *info;
8217 struct ppc_link_hash_table *htab;
8218 bfd_byte *loc;
8219 bfd_byte *p;
8220 unsigned int indx;
8221 struct plt_entry *ent;
8222 bfd_vma dest, off;
8223 int size;
8224
8225 /* Massage our args to the form they really have. */
8226 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8227 info = in_arg;
8228
8229 htab = ppc_hash_table (info);
8230
8231 /* Make a note of the offset within the stubs for this entry. */
8232 stub_entry->stub_offset = stub_entry->stub_sec->size;
8233 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8234
8235 htab->stub_count[stub_entry->stub_type - 1] += 1;
8236 switch (stub_entry->stub_type)
8237 {
8238 case ppc_stub_long_branch:
8239 case ppc_stub_long_branch_r2off:
8240 /* Branches are relative. This is where we are going to. */
8241 off = dest = (stub_entry->target_value
8242 + stub_entry->target_section->output_offset
8243 + stub_entry->target_section->output_section->vma);
8244
8245 /* And this is where we are coming from. */
8246 off -= (stub_entry->stub_offset
8247 + stub_entry->stub_sec->output_offset
8248 + stub_entry->stub_sec->output_section->vma);
8249
8250 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8251 size = 4;
8252 else
8253 {
8254 bfd_vma r2off;
8255
8256 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8257 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8258 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8259 loc += 4;
8260 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8261 loc += 4;
8262 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8263 loc += 4;
8264 off -= 12;
8265 size = 16;
8266 }
8267 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8268
8269 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8270 {
8271 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8272 stub_entry->root.string);
8273 htab->stub_error = TRUE;
8274 return FALSE;
8275 }
8276
8277 if (info->emitrelocations)
8278 {
8279 Elf_Internal_Rela *relocs, *r;
8280 struct bfd_elf_section_data *elfsec_data;
8281
8282 elfsec_data = elf_section_data (stub_entry->stub_sec);
8283 relocs = elfsec_data->relocs;
8284 if (relocs == NULL)
8285 {
8286 bfd_size_type relsize;
8287 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8288 relocs = bfd_alloc (htab->stub_bfd, relsize);
8289 if (relocs == NULL)
8290 return FALSE;
8291 elfsec_data->relocs = relocs;
8292 elfsec_data->rel_hdr.sh_size = relsize;
8293 elfsec_data->rel_hdr.sh_entsize = 24;
8294 stub_entry->stub_sec->reloc_count = 0;
8295 }
8296 r = relocs + stub_entry->stub_sec->reloc_count;
8297 stub_entry->stub_sec->reloc_count += 1;
8298 r->r_offset = loc - stub_entry->stub_sec->contents;
8299 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8300 r->r_addend = dest;
8301 if (stub_entry->h != NULL)
8302 {
8303 struct elf_link_hash_entry **hashes;
8304 unsigned long symndx;
8305 struct ppc_link_hash_entry *h;
8306
8307 hashes = elf_sym_hashes (htab->stub_bfd);
8308 if (hashes == NULL)
8309 {
8310 bfd_size_type hsize;
8311
8312 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8313 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8314 if (hashes == NULL)
8315 return FALSE;
8316 elf_sym_hashes (htab->stub_bfd) = hashes;
8317 htab->stub_globals = 1;
8318 }
8319 symndx = htab->stub_globals++;
8320 h = stub_entry->h;
8321 hashes[symndx] = &h->elf;
8322 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8323 if (h->oh != NULL && h->oh->is_func)
8324 h = h->oh;
8325 if (h->elf.root.u.def.section != stub_entry->target_section)
8326 /* H is an opd symbol. The addend must be zero. */
8327 r->r_addend = 0;
8328 else
8329 {
8330 off = (h->elf.root.u.def.value
8331 + h->elf.root.u.def.section->output_offset
8332 + h->elf.root.u.def.section->output_section->vma);
8333 r->r_addend -= off;
8334 }
8335 }
8336 }
8337 break;
8338
8339 case ppc_stub_plt_branch:
8340 case ppc_stub_plt_branch_r2off:
8341 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8342 stub_entry->root.string + 9,
8343 FALSE, FALSE);
8344 if (br_entry == NULL)
8345 {
8346 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8347 stub_entry->root.string);
8348 htab->stub_error = TRUE;
8349 return FALSE;
8350 }
8351
8352 off = (stub_entry->target_value
8353 + stub_entry->target_section->output_offset
8354 + stub_entry->target_section->output_section->vma);
8355
8356 bfd_put_64 (htab->brlt->owner, off,
8357 htab->brlt->contents + br_entry->offset);
8358
8359 if (htab->relbrlt != NULL)
8360 {
8361 /* Create a reloc for the branch lookup table entry. */
8362 Elf_Internal_Rela rela;
8363 bfd_byte *rl;
8364
8365 rela.r_offset = (br_entry->offset
8366 + htab->brlt->output_offset
8367 + htab->brlt->output_section->vma);
8368 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8369 rela.r_addend = off;
8370
8371 rl = htab->relbrlt->contents;
8372 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8373 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8374 }
8375 else if (info->emitrelocations)
8376 {
8377 Elf_Internal_Rela *relocs, *r;
8378 struct bfd_elf_section_data *elfsec_data;
8379
8380 elfsec_data = elf_section_data (htab->brlt);
8381 relocs = elfsec_data->relocs;
8382 if (relocs == NULL)
8383 {
8384 bfd_size_type relsize;
8385 relsize = htab->brlt->reloc_count * sizeof (*relocs);
8386 relocs = bfd_alloc (htab->brlt->owner, relsize);
8387 if (relocs == NULL)
8388 return FALSE;
8389 elfsec_data->relocs = relocs;
8390 elfsec_data->rel_hdr.sh_size = relsize;
8391 elfsec_data->rel_hdr.sh_entsize = 24;
8392 htab->brlt->reloc_count = 0;
8393 }
8394 r = relocs + htab->brlt->reloc_count;
8395 htab->brlt->reloc_count += 1;
8396 r->r_offset = (br_entry->offset
8397 + htab->brlt->output_offset
8398 + htab->brlt->output_section->vma);
8399 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8400 r->r_addend = off;
8401 }
8402
8403 off = (br_entry->offset
8404 + htab->brlt->output_offset
8405 + htab->brlt->output_section->vma
8406 - elf_gp (htab->brlt->output_section->owner)
8407 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8408
8409 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8410 {
8411 (*_bfd_error_handler)
8412 (_("linkage table error against `%s'"),
8413 stub_entry->root.string);
8414 bfd_set_error (bfd_error_bad_value);
8415 htab->stub_error = TRUE;
8416 return FALSE;
8417 }
8418
8419 indx = off;
8420 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8421 {
8422 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8423 loc += 4;
8424 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8425 size = 16;
8426 }
8427 else
8428 {
8429 bfd_vma r2off;
8430
8431 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8432 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8433 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8434 loc += 4;
8435 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8436 loc += 4;
8437 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8438 loc += 4;
8439 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8440 loc += 4;
8441 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8442 size = 28;
8443 }
8444 loc += 4;
8445 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8446 loc += 4;
8447 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8448 break;
8449
8450 case ppc_stub_plt_call:
8451 /* Do the best we can for shared libraries built without
8452 exporting ".foo" for each "foo". This can happen when symbol
8453 versioning scripts strip all bar a subset of symbols. */
8454 if (stub_entry->h->oh != NULL
8455 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8456 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8457 {
8458 /* Point the symbol at the stub. There may be multiple stubs,
8459 we don't really care; The main thing is to make this sym
8460 defined somewhere. Maybe defining the symbol in the stub
8461 section is a silly idea. If we didn't do this, htab->top_id
8462 could disappear. */
8463 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8464 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8465 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8466 }
8467
8468 /* Now build the stub. */
8469 off = (bfd_vma) -1;
8470 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8471 if (ent->addend == stub_entry->addend)
8472 {
8473 off = ent->plt.offset;
8474 break;
8475 }
8476 if (off >= (bfd_vma) -2)
8477 abort ();
8478
8479 off &= ~ (bfd_vma) 1;
8480 off += (htab->plt->output_offset
8481 + htab->plt->output_section->vma
8482 - elf_gp (htab->plt->output_section->owner)
8483 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8484
8485 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8486 {
8487 (*_bfd_error_handler)
8488 (_("linkage table error against `%s'"),
8489 stub_entry->h->elf.root.root.string);
8490 bfd_set_error (bfd_error_bad_value);
8491 htab->stub_error = TRUE;
8492 return FALSE;
8493 }
8494
8495 p = build_plt_stub (htab->stub_bfd, loc, off);
8496 size = p - loc;
8497 break;
8498
8499 default:
8500 BFD_FAIL ();
8501 return FALSE;
8502 }
8503
8504 stub_entry->stub_sec->size += size;
8505
8506 if (htab->emit_stub_syms)
8507 {
8508 struct elf_link_hash_entry *h;
8509 size_t len1, len2;
8510 char *name;
8511 const char *const stub_str[] = { "long_branch",
8512 "long_branch_r2off",
8513 "plt_branch",
8514 "plt_branch_r2off",
8515 "plt_call" };
8516
8517 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8518 len2 = strlen (stub_entry->root.string);
8519 name = bfd_malloc (len1 + len2 + 2);
8520 if (name == NULL)
8521 return FALSE;
8522 memcpy (name, stub_entry->root.string, 9);
8523 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8524 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8525 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8526 if (h == NULL)
8527 return FALSE;
8528 if (h->root.type == bfd_link_hash_new)
8529 {
8530 h->root.type = bfd_link_hash_defined;
8531 h->root.u.def.section = stub_entry->stub_sec;
8532 h->root.u.def.value = stub_entry->stub_offset;
8533 h->ref_regular = 1;
8534 h->def_regular = 1;
8535 h->ref_regular_nonweak = 1;
8536 h->forced_local = 1;
8537 h->non_elf = 0;
8538 }
8539 }
8540
8541 return TRUE;
8542 }
8543
8544 /* As above, but don't actually build the stub. Just bump offset so
8545 we know stub section sizes, and select plt_branch stubs where
8546 long_branch stubs won't do. */
8547
8548 static bfd_boolean
8549 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8550 {
8551 struct ppc_stub_hash_entry *stub_entry;
8552 struct bfd_link_info *info;
8553 struct ppc_link_hash_table *htab;
8554 bfd_vma off;
8555 int size;
8556
8557 /* Massage our args to the form they really have. */
8558 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8559 info = in_arg;
8560
8561 htab = ppc_hash_table (info);
8562
8563 if (stub_entry->stub_type == ppc_stub_plt_call)
8564 {
8565 struct plt_entry *ent;
8566 off = (bfd_vma) -1;
8567 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8568 if (ent->addend == stub_entry->addend)
8569 {
8570 off = ent->plt.offset & ~(bfd_vma) 1;
8571 break;
8572 }
8573 if (off >= (bfd_vma) -2)
8574 abort ();
8575 off += (htab->plt->output_offset
8576 + htab->plt->output_section->vma
8577 - elf_gp (htab->plt->output_section->owner)
8578 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8579
8580 size = PLT_CALL_STUB_SIZE;
8581 if (PPC_HA (off + 16) != PPC_HA (off))
8582 size += 4;
8583 }
8584 else
8585 {
8586 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8587 variants. */
8588 off = (stub_entry->target_value
8589 + stub_entry->target_section->output_offset
8590 + stub_entry->target_section->output_section->vma);
8591 off -= (stub_entry->stub_sec->size
8592 + stub_entry->stub_sec->output_offset
8593 + stub_entry->stub_sec->output_section->vma);
8594
8595 /* Reset the stub type from the plt variant in case we now
8596 can reach with a shorter stub. */
8597 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8598 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8599
8600 size = 4;
8601 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8602 {
8603 off -= 12;
8604 size = 16;
8605 }
8606
8607 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8608 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8609 {
8610 struct ppc_branch_hash_entry *br_entry;
8611
8612 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8613 stub_entry->root.string + 9,
8614 TRUE, FALSE);
8615 if (br_entry == NULL)
8616 {
8617 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8618 stub_entry->root.string);
8619 htab->stub_error = TRUE;
8620 return FALSE;
8621 }
8622
8623 if (br_entry->iter != htab->stub_iteration)
8624 {
8625 br_entry->iter = htab->stub_iteration;
8626 br_entry->offset = htab->brlt->size;
8627 htab->brlt->size += 8;
8628
8629 if (htab->relbrlt != NULL)
8630 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8631 else if (info->emitrelocations)
8632 {
8633 htab->brlt->reloc_count += 1;
8634 htab->brlt->flags |= SEC_RELOC;
8635 }
8636 }
8637
8638 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8639 size = 16;
8640 if (stub_entry->stub_type != ppc_stub_plt_branch)
8641 size = 28;
8642 }
8643 else if (info->emitrelocations)
8644 {
8645 stub_entry->stub_sec->reloc_count += 1;
8646 stub_entry->stub_sec->flags |= SEC_RELOC;
8647 }
8648 }
8649
8650 stub_entry->stub_sec->size += size;
8651 return TRUE;
8652 }
8653
8654 /* Set up various things so that we can make a list of input sections
8655 for each output section included in the link. Returns -1 on error,
8656 0 when no stubs will be needed, and 1 on success. */
8657
8658 int
8659 ppc64_elf_setup_section_lists (bfd *output_bfd,
8660 struct bfd_link_info *info,
8661 int no_multi_toc)
8662 {
8663 bfd *input_bfd;
8664 int top_id, top_index, id;
8665 asection *section;
8666 asection **input_list;
8667 bfd_size_type amt;
8668 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8669
8670 htab->no_multi_toc = no_multi_toc;
8671
8672 if (htab->brlt == NULL)
8673 return 0;
8674
8675 /* Find the top input section id. */
8676 for (input_bfd = info->input_bfds, top_id = 3;
8677 input_bfd != NULL;
8678 input_bfd = input_bfd->link_next)
8679 {
8680 for (section = input_bfd->sections;
8681 section != NULL;
8682 section = section->next)
8683 {
8684 if (top_id < section->id)
8685 top_id = section->id;
8686 }
8687 }
8688
8689 htab->top_id = top_id;
8690 amt = sizeof (struct map_stub) * (top_id + 1);
8691 htab->stub_group = bfd_zmalloc (amt);
8692 if (htab->stub_group == NULL)
8693 return -1;
8694
8695 /* Set toc_off for com, und, abs and ind sections. */
8696 for (id = 0; id < 3; id++)
8697 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8698
8699 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8700
8701 /* We can't use output_bfd->section_count here to find the top output
8702 section index as some sections may have been removed, and
8703 strip_excluded_output_sections doesn't renumber the indices. */
8704 for (section = output_bfd->sections, top_index = 0;
8705 section != NULL;
8706 section = section->next)
8707 {
8708 if (top_index < section->index)
8709 top_index = section->index;
8710 }
8711
8712 htab->top_index = top_index;
8713 amt = sizeof (asection *) * (top_index + 1);
8714 input_list = bfd_zmalloc (amt);
8715 htab->input_list = input_list;
8716 if (input_list == NULL)
8717 return -1;
8718
8719 return 1;
8720 }
8721
8722 /* The linker repeatedly calls this function for each TOC input section
8723 and linker generated GOT section. Group input bfds such that the toc
8724 within a group is less than 64k in size. Will break with cute linker
8725 scripts that play games with dot in the output toc section. */
8726
8727 void
8728 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8729 {
8730 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8731
8732 if (!htab->no_multi_toc)
8733 {
8734 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8735 bfd_vma off = addr - htab->toc_curr;
8736
8737 if (off + isec->size > 0x10000)
8738 htab->toc_curr = addr;
8739
8740 elf_gp (isec->owner) = (htab->toc_curr
8741 - elf_gp (isec->output_section->owner)
8742 + TOC_BASE_OFF);
8743 }
8744 }
8745
8746 /* Called after the last call to the above function. */
8747
8748 void
8749 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8750 {
8751 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8752
8753 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8754
8755 /* toc_curr tracks the TOC offset used for code sections below in
8756 ppc64_elf_next_input_section. Start off at 0x8000. */
8757 htab->toc_curr = TOC_BASE_OFF;
8758 }
8759
8760 /* No toc references were found in ISEC. If the code in ISEC makes no
8761 calls, then there's no need to use toc adjusting stubs when branching
8762 into ISEC. Actually, indirect calls from ISEC are OK as they will
8763 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8764 needed, and 2 if a cyclical call-graph was found but no other reason
8765 for a stub was detected. If called from the top level, a return of
8766 2 means the same as a return of 0. */
8767
8768 static int
8769 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8770 {
8771 Elf_Internal_Rela *relstart, *rel;
8772 Elf_Internal_Sym *local_syms;
8773 int ret;
8774 struct ppc_link_hash_table *htab;
8775
8776 /* We know none of our code bearing sections will need toc stubs. */
8777 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8778 return 0;
8779
8780 if (isec->size == 0)
8781 return 0;
8782
8783 if (isec->output_section == NULL)
8784 return 0;
8785
8786 /* Hack for linux kernel. .fixup contains branches, but only back to
8787 the function that hit an exception. */
8788 if (strcmp (isec->name, ".fixup") == 0)
8789 return 0;
8790
8791 if (isec->reloc_count == 0)
8792 return 0;
8793
8794 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8795 info->keep_memory);
8796 if (relstart == NULL)
8797 return -1;
8798
8799 /* Look for branches to outside of this section. */
8800 local_syms = NULL;
8801 ret = 0;
8802 htab = ppc_hash_table (info);
8803 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8804 {
8805 enum elf_ppc64_reloc_type r_type;
8806 unsigned long r_symndx;
8807 struct elf_link_hash_entry *h;
8808 Elf_Internal_Sym *sym;
8809 asection *sym_sec;
8810 long *opd_adjust;
8811 bfd_vma sym_value;
8812 bfd_vma dest;
8813
8814 r_type = ELF64_R_TYPE (rel->r_info);
8815 if (r_type != R_PPC64_REL24
8816 && r_type != R_PPC64_REL14
8817 && r_type != R_PPC64_REL14_BRTAKEN
8818 && r_type != R_PPC64_REL14_BRNTAKEN)
8819 continue;
8820
8821 r_symndx = ELF64_R_SYM (rel->r_info);
8822 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8823 isec->owner))
8824 {
8825 ret = -1;
8826 break;
8827 }
8828
8829 /* Calls to dynamic lib functions go through a plt call stub
8830 that uses r2. Branches to undefined symbols might be a call
8831 using old-style dot symbols that can be satisfied by a plt
8832 call into a new-style dynamic library. */
8833 if (sym_sec == NULL)
8834 {
8835 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8836 if (eh != NULL
8837 && eh->oh != NULL
8838 && eh->oh->elf.plt.plist != NULL)
8839 {
8840 ret = 1;
8841 break;
8842 }
8843
8844 /* Ignore other undefined symbols. */
8845 continue;
8846 }
8847
8848 /* Assume branches to other sections not included in the link need
8849 stubs too, to cover -R and absolute syms. */
8850 if (sym_sec->output_section == NULL)
8851 {
8852 ret = 1;
8853 break;
8854 }
8855
8856 if (h == NULL)
8857 sym_value = sym->st_value;
8858 else
8859 {
8860 if (h->root.type != bfd_link_hash_defined
8861 && h->root.type != bfd_link_hash_defweak)
8862 abort ();
8863 sym_value = h->root.u.def.value;
8864 }
8865 sym_value += rel->r_addend;
8866
8867 /* If this branch reloc uses an opd sym, find the code section. */
8868 opd_adjust = get_opd_info (sym_sec);
8869 if (opd_adjust != NULL)
8870 {
8871 if (h == NULL)
8872 {
8873 long adjust;
8874
8875 adjust = opd_adjust[sym->st_value / 8];
8876 if (adjust == -1)
8877 /* Assume deleted functions won't ever be called. */
8878 continue;
8879 sym_value += adjust;
8880 }
8881
8882 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8883 if (dest == (bfd_vma) -1)
8884 continue;
8885 }
8886 else
8887 dest = (sym_value
8888 + sym_sec->output_offset
8889 + sym_sec->output_section->vma);
8890
8891 /* Ignore branch to self. */
8892 if (sym_sec == isec)
8893 continue;
8894
8895 /* If the called function uses the toc, we need a stub. */
8896 if (sym_sec->has_toc_reloc
8897 || sym_sec->makes_toc_func_call)
8898 {
8899 ret = 1;
8900 break;
8901 }
8902
8903 /* Assume any branch that needs a long branch stub might in fact
8904 need a plt_branch stub. A plt_branch stub uses r2. */
8905 else if (dest - (isec->output_offset
8906 + isec->output_section->vma
8907 + rel->r_offset) + (1 << 25) >= (2 << 25))
8908 {
8909 ret = 1;
8910 break;
8911 }
8912
8913 /* If calling back to a section in the process of being tested, we
8914 can't say for sure that no toc adjusting stubs are needed, so
8915 don't return zero. */
8916 else if (sym_sec->call_check_in_progress)
8917 ret = 2;
8918
8919 /* Branches to another section that itself doesn't have any TOC
8920 references are OK. Recursively call ourselves to check. */
8921 else if (sym_sec->id <= htab->top_id
8922 && htab->stub_group[sym_sec->id].toc_off == 0)
8923 {
8924 int recur;
8925
8926 /* Mark current section as indeterminate, so that other
8927 sections that call back to current won't be marked as
8928 known. */
8929 isec->call_check_in_progress = 1;
8930 recur = toc_adjusting_stub_needed (info, sym_sec);
8931 isec->call_check_in_progress = 0;
8932
8933 if (recur < 0)
8934 {
8935 /* An error. Exit. */
8936 ret = -1;
8937 break;
8938 }
8939 else if (recur <= 1)
8940 {
8941 /* Known result. Mark as checked and set section flag. */
8942 htab->stub_group[sym_sec->id].toc_off = 1;
8943 if (recur != 0)
8944 {
8945 sym_sec->makes_toc_func_call = 1;
8946 ret = 1;
8947 break;
8948 }
8949 }
8950 else
8951 {
8952 /* Unknown result. Continue checking. */
8953 ret = 2;
8954 }
8955 }
8956 }
8957
8958 if (local_syms != NULL
8959 && (elf_tdata (isec->owner)->symtab_hdr.contents
8960 != (unsigned char *) local_syms))
8961 free (local_syms);
8962 if (elf_section_data (isec)->relocs != relstart)
8963 free (relstart);
8964
8965 return ret;
8966 }
8967
8968 /* The linker repeatedly calls this function for each input section,
8969 in the order that input sections are linked into output sections.
8970 Build lists of input sections to determine groupings between which
8971 we may insert linker stubs. */
8972
8973 bfd_boolean
8974 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8975 {
8976 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8977
8978 if ((isec->output_section->flags & SEC_CODE) != 0
8979 && isec->output_section->index <= htab->top_index)
8980 {
8981 asection **list = htab->input_list + isec->output_section->index;
8982 /* Steal the link_sec pointer for our list. */
8983 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8984 /* This happens to make the list in reverse order,
8985 which is what we want. */
8986 PREV_SEC (isec) = *list;
8987 *list = isec;
8988 }
8989
8990 if (htab->multi_toc_needed)
8991 {
8992 /* If a code section has a function that uses the TOC then we need
8993 to use the right TOC (obviously). Also, make sure that .opd gets
8994 the correct TOC value for R_PPC64_TOC relocs that don't have or
8995 can't find their function symbol (shouldn't ever happen now). */
8996 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8997 {
8998 if (elf_gp (isec->owner) != 0)
8999 htab->toc_curr = elf_gp (isec->owner);
9000 }
9001 else if (htab->stub_group[isec->id].toc_off == 0)
9002 {
9003 int ret = toc_adjusting_stub_needed (info, isec);
9004 if (ret < 0)
9005 return FALSE;
9006 else
9007 isec->makes_toc_func_call = ret & 1;
9008 }
9009 }
9010
9011 /* Functions that don't use the TOC can belong in any TOC group.
9012 Use the last TOC base. This happens to make _init and _fini
9013 pasting work. */
9014 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9015 return TRUE;
9016 }
9017
9018 /* See whether we can group stub sections together. Grouping stub
9019 sections may result in fewer stubs. More importantly, we need to
9020 put all .init* and .fini* stubs at the beginning of the .init or
9021 .fini output sections respectively, because glibc splits the
9022 _init and _fini functions into multiple parts. Putting a stub in
9023 the middle of a function is not a good idea. */
9024
9025 static void
9026 group_sections (struct ppc_link_hash_table *htab,
9027 bfd_size_type stub_group_size,
9028 bfd_boolean stubs_always_before_branch)
9029 {
9030 asection **list;
9031 bfd_size_type stub14_group_size;
9032 bfd_boolean suppress_size_errors;
9033
9034 suppress_size_errors = FALSE;
9035 stub14_group_size = stub_group_size;
9036 if (stub_group_size == 1)
9037 {
9038 /* Default values. */
9039 if (stubs_always_before_branch)
9040 {
9041 stub_group_size = 0x1e00000;
9042 stub14_group_size = 0x7800;
9043 }
9044 else
9045 {
9046 stub_group_size = 0x1c00000;
9047 stub14_group_size = 0x7000;
9048 }
9049 suppress_size_errors = TRUE;
9050 }
9051
9052 list = htab->input_list + htab->top_index;
9053 do
9054 {
9055 asection *tail = *list;
9056 while (tail != NULL)
9057 {
9058 asection *curr;
9059 asection *prev;
9060 bfd_size_type total;
9061 bfd_boolean big_sec;
9062 bfd_vma curr_toc;
9063
9064 curr = tail;
9065 total = tail->size;
9066 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9067 ? stub14_group_size : stub_group_size);
9068 if (big_sec && !suppress_size_errors)
9069 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9070 tail->owner, tail);
9071 curr_toc = htab->stub_group[tail->id].toc_off;
9072
9073 while ((prev = PREV_SEC (curr)) != NULL
9074 && ((total += curr->output_offset - prev->output_offset)
9075 < (ppc64_elf_section_data (prev)->has_14bit_branch
9076 ? stub14_group_size : stub_group_size))
9077 && htab->stub_group[prev->id].toc_off == curr_toc)
9078 curr = prev;
9079
9080 /* OK, the size from the start of CURR to the end is less
9081 than stub_group_size and thus can be handled by one stub
9082 section. (or the tail section is itself larger than
9083 stub_group_size, in which case we may be toast.) We
9084 should really be keeping track of the total size of stubs
9085 added here, as stubs contribute to the final output
9086 section size. That's a little tricky, and this way will
9087 only break if stubs added make the total size more than
9088 2^25, ie. for the default stub_group_size, if stubs total
9089 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9090 do
9091 {
9092 prev = PREV_SEC (tail);
9093 /* Set up this stub group. */
9094 htab->stub_group[tail->id].link_sec = curr;
9095 }
9096 while (tail != curr && (tail = prev) != NULL);
9097
9098 /* But wait, there's more! Input sections up to stub_group_size
9099 bytes before the stub section can be handled by it too.
9100 Don't do this if we have a really large section after the
9101 stubs, as adding more stubs increases the chance that
9102 branches may not reach into the stub section. */
9103 if (!stubs_always_before_branch && !big_sec)
9104 {
9105 total = 0;
9106 while (prev != NULL
9107 && ((total += tail->output_offset - prev->output_offset)
9108 < (ppc64_elf_section_data (prev)->has_14bit_branch
9109 ? stub14_group_size : stub_group_size))
9110 && htab->stub_group[prev->id].toc_off == curr_toc)
9111 {
9112 tail = prev;
9113 prev = PREV_SEC (tail);
9114 htab->stub_group[tail->id].link_sec = curr;
9115 }
9116 }
9117 tail = prev;
9118 }
9119 }
9120 while (list-- != htab->input_list);
9121 free (htab->input_list);
9122 #undef PREV_SEC
9123 }
9124
9125 /* Determine and set the size of the stub section for a final link.
9126
9127 The basic idea here is to examine all the relocations looking for
9128 PC-relative calls to a target that is unreachable with a "bl"
9129 instruction. */
9130
9131 bfd_boolean
9132 ppc64_elf_size_stubs (bfd *output_bfd,
9133 struct bfd_link_info *info,
9134 bfd_signed_vma group_size,
9135 asection *(*add_stub_section) (const char *, asection *),
9136 void (*layout_sections_again) (void))
9137 {
9138 bfd_size_type stub_group_size;
9139 bfd_boolean stubs_always_before_branch;
9140 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9141
9142 /* Stash our params away. */
9143 htab->add_stub_section = add_stub_section;
9144 htab->layout_sections_again = layout_sections_again;
9145 stubs_always_before_branch = group_size < 0;
9146 if (group_size < 0)
9147 stub_group_size = -group_size;
9148 else
9149 stub_group_size = group_size;
9150
9151 group_sections (htab, stub_group_size, stubs_always_before_branch);
9152
9153 while (1)
9154 {
9155 bfd *input_bfd;
9156 unsigned int bfd_indx;
9157 asection *stub_sec;
9158
9159 htab->stub_iteration += 1;
9160
9161 for (input_bfd = info->input_bfds, bfd_indx = 0;
9162 input_bfd != NULL;
9163 input_bfd = input_bfd->link_next, bfd_indx++)
9164 {
9165 Elf_Internal_Shdr *symtab_hdr;
9166 asection *section;
9167 Elf_Internal_Sym *local_syms = NULL;
9168
9169 if (!is_ppc64_elf_target (input_bfd->xvec))
9170 continue;
9171
9172 /* We'll need the symbol table in a second. */
9173 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9174 if (symtab_hdr->sh_info == 0)
9175 continue;
9176
9177 /* Walk over each section attached to the input bfd. */
9178 for (section = input_bfd->sections;
9179 section != NULL;
9180 section = section->next)
9181 {
9182 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9183
9184 /* If there aren't any relocs, then there's nothing more
9185 to do. */
9186 if ((section->flags & SEC_RELOC) == 0
9187 || (section->flags & SEC_ALLOC) == 0
9188 || (section->flags & SEC_LOAD) == 0
9189 || (section->flags & SEC_CODE) == 0
9190 || section->reloc_count == 0)
9191 continue;
9192
9193 /* If this section is a link-once section that will be
9194 discarded, then don't create any stubs. */
9195 if (section->output_section == NULL
9196 || section->output_section->owner != output_bfd)
9197 continue;
9198
9199 /* Get the relocs. */
9200 internal_relocs
9201 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9202 info->keep_memory);
9203 if (internal_relocs == NULL)
9204 goto error_ret_free_local;
9205
9206 /* Now examine each relocation. */
9207 irela = internal_relocs;
9208 irelaend = irela + section->reloc_count;
9209 for (; irela < irelaend; irela++)
9210 {
9211 enum elf_ppc64_reloc_type r_type;
9212 unsigned int r_indx;
9213 enum ppc_stub_type stub_type;
9214 struct ppc_stub_hash_entry *stub_entry;
9215 asection *sym_sec, *code_sec;
9216 bfd_vma sym_value;
9217 bfd_vma destination;
9218 bfd_boolean ok_dest;
9219 struct ppc_link_hash_entry *hash;
9220 struct ppc_link_hash_entry *fdh;
9221 struct elf_link_hash_entry *h;
9222 Elf_Internal_Sym *sym;
9223 char *stub_name;
9224 const asection *id_sec;
9225 long *opd_adjust;
9226
9227 r_type = ELF64_R_TYPE (irela->r_info);
9228 r_indx = ELF64_R_SYM (irela->r_info);
9229
9230 if (r_type >= R_PPC64_max)
9231 {
9232 bfd_set_error (bfd_error_bad_value);
9233 goto error_ret_free_internal;
9234 }
9235
9236 /* Only look for stubs on branch instructions. */
9237 if (r_type != R_PPC64_REL24
9238 && r_type != R_PPC64_REL14
9239 && r_type != R_PPC64_REL14_BRTAKEN
9240 && r_type != R_PPC64_REL14_BRNTAKEN)
9241 continue;
9242
9243 /* Now determine the call target, its name, value,
9244 section. */
9245 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9246 r_indx, input_bfd))
9247 goto error_ret_free_internal;
9248 hash = (struct ppc_link_hash_entry *) h;
9249
9250 ok_dest = FALSE;
9251 fdh = NULL;
9252 sym_value = 0;
9253 if (hash == NULL)
9254 {
9255 sym_value = sym->st_value;
9256 ok_dest = TRUE;
9257 }
9258 else if (hash->elf.root.type == bfd_link_hash_defined
9259 || hash->elf.root.type == bfd_link_hash_defweak)
9260 {
9261 sym_value = hash->elf.root.u.def.value;
9262 if (sym_sec->output_section != NULL)
9263 ok_dest = TRUE;
9264 }
9265 else if (hash->elf.root.type == bfd_link_hash_undefweak
9266 || hash->elf.root.type == bfd_link_hash_undefined)
9267 {
9268 /* Recognise an old ABI func code entry sym, and
9269 use the func descriptor sym instead if it is
9270 defined. */
9271 if (hash->elf.root.root.string[0] == '.'
9272 && (fdh = get_fdh (hash, htab)) != NULL)
9273 {
9274 if (fdh->elf.root.type == bfd_link_hash_defined
9275 || fdh->elf.root.type == bfd_link_hash_defweak)
9276 {
9277 sym_sec = fdh->elf.root.u.def.section;
9278 sym_value = fdh->elf.root.u.def.value;
9279 if (sym_sec->output_section != NULL)
9280 ok_dest = TRUE;
9281 }
9282 else
9283 fdh = NULL;
9284 }
9285 }
9286 else
9287 {
9288 bfd_set_error (bfd_error_bad_value);
9289 goto error_ret_free_internal;
9290 }
9291
9292 destination = 0;
9293 if (ok_dest)
9294 {
9295 sym_value += irela->r_addend;
9296 destination = (sym_value
9297 + sym_sec->output_offset
9298 + sym_sec->output_section->vma);
9299 }
9300
9301 code_sec = sym_sec;
9302 opd_adjust = get_opd_info (sym_sec);
9303 if (opd_adjust != NULL)
9304 {
9305 bfd_vma dest;
9306
9307 if (hash == NULL)
9308 {
9309 long adjust = opd_adjust[sym_value / 8];
9310 if (adjust == -1)
9311 continue;
9312 sym_value += adjust;
9313 }
9314 dest = opd_entry_value (sym_sec, sym_value,
9315 &code_sec, &sym_value);
9316 if (dest != (bfd_vma) -1)
9317 {
9318 destination = dest;
9319 if (fdh != NULL)
9320 {
9321 /* Fixup old ABI sym to point at code
9322 entry. */
9323 hash->elf.root.type = bfd_link_hash_defweak;
9324 hash->elf.root.u.def.section = code_sec;
9325 hash->elf.root.u.def.value = sym_value;
9326 }
9327 }
9328 }
9329
9330 /* Determine what (if any) linker stub is needed. */
9331 stub_type = ppc_type_of_stub (section, irela, &hash,
9332 destination);
9333
9334 if (stub_type != ppc_stub_plt_call)
9335 {
9336 /* Check whether we need a TOC adjusting stub.
9337 Since the linker pastes together pieces from
9338 different object files when creating the
9339 _init and _fini functions, it may be that a
9340 call to what looks like a local sym is in
9341 fact a call needing a TOC adjustment. */
9342 if (code_sec != NULL
9343 && code_sec->output_section != NULL
9344 && (htab->stub_group[code_sec->id].toc_off
9345 != htab->stub_group[section->id].toc_off)
9346 && (code_sec->has_toc_reloc
9347 || code_sec->makes_toc_func_call))
9348 stub_type = ppc_stub_long_branch_r2off;
9349 }
9350
9351 if (stub_type == ppc_stub_none)
9352 continue;
9353
9354 /* __tls_get_addr calls might be eliminated. */
9355 if (stub_type != ppc_stub_plt_call
9356 && hash != NULL
9357 && (hash == htab->tls_get_addr
9358 || hash == htab->tls_get_addr_fd)
9359 && section->has_tls_reloc
9360 && irela != internal_relocs)
9361 {
9362 /* Get tls info. */
9363 char *tls_mask;
9364
9365 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9366 irela - 1, input_bfd))
9367 goto error_ret_free_internal;
9368 if (*tls_mask != 0)
9369 continue;
9370 }
9371
9372 /* Support for grouping stub sections. */
9373 id_sec = htab->stub_group[section->id].link_sec;
9374
9375 /* Get the name of this stub. */
9376 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9377 if (!stub_name)
9378 goto error_ret_free_internal;
9379
9380 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9381 stub_name, FALSE, FALSE);
9382 if (stub_entry != NULL)
9383 {
9384 /* The proper stub has already been created. */
9385 free (stub_name);
9386 continue;
9387 }
9388
9389 stub_entry = ppc_add_stub (stub_name, section, htab);
9390 if (stub_entry == NULL)
9391 {
9392 free (stub_name);
9393 error_ret_free_internal:
9394 if (elf_section_data (section)->relocs == NULL)
9395 free (internal_relocs);
9396 error_ret_free_local:
9397 if (local_syms != NULL
9398 && (symtab_hdr->contents
9399 != (unsigned char *) local_syms))
9400 free (local_syms);
9401 return FALSE;
9402 }
9403
9404 stub_entry->stub_type = stub_type;
9405 stub_entry->target_value = sym_value;
9406 stub_entry->target_section = code_sec;
9407 stub_entry->h = hash;
9408 stub_entry->addend = irela->r_addend;
9409
9410 if (stub_entry->h != NULL)
9411 htab->stub_globals += 1;
9412 }
9413
9414 /* We're done with the internal relocs, free them. */
9415 if (elf_section_data (section)->relocs != internal_relocs)
9416 free (internal_relocs);
9417 }
9418
9419 if (local_syms != NULL
9420 && symtab_hdr->contents != (unsigned char *) local_syms)
9421 {
9422 if (!info->keep_memory)
9423 free (local_syms);
9424 else
9425 symtab_hdr->contents = (unsigned char *) local_syms;
9426 }
9427 }
9428
9429 /* We may have added some stubs. Find out the new size of the
9430 stub sections. */
9431 for (stub_sec = htab->stub_bfd->sections;
9432 stub_sec != NULL;
9433 stub_sec = stub_sec->next)
9434 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9435 {
9436 stub_sec->rawsize = stub_sec->size;
9437 stub_sec->size = 0;
9438 stub_sec->reloc_count = 0;
9439 stub_sec->flags &= ~SEC_RELOC;
9440 }
9441
9442 htab->brlt->size = 0;
9443 htab->brlt->reloc_count = 0;
9444 htab->brlt->flags &= ~SEC_RELOC;
9445 if (htab->relbrlt != NULL)
9446 htab->relbrlt->size = 0;
9447
9448 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9449
9450 for (stub_sec = htab->stub_bfd->sections;
9451 stub_sec != NULL;
9452 stub_sec = stub_sec->next)
9453 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9454 && stub_sec->rawsize != stub_sec->size)
9455 break;
9456
9457 /* Exit from this loop when no stubs have been added, and no stubs
9458 have changed size. */
9459 if (stub_sec == NULL)
9460 break;
9461
9462 /* Ask the linker to do its stuff. */
9463 (*htab->layout_sections_again) ();
9464 }
9465
9466 /* It would be nice to strip htab->brlt from the output if the
9467 section is empty, but it's too late. If we strip sections here,
9468 the dynamic symbol table is corrupted since the section symbol
9469 for the stripped section isn't written. */
9470
9471 return TRUE;
9472 }
9473
9474 /* Called after we have determined section placement. If sections
9475 move, we'll be called again. Provide a value for TOCstart. */
9476
9477 bfd_vma
9478 ppc64_elf_toc (bfd *obfd)
9479 {
9480 asection *s;
9481 bfd_vma TOCstart;
9482
9483 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9484 order. The TOC starts where the first of these sections starts. */
9485 s = bfd_get_section_by_name (obfd, ".got");
9486 if (s == NULL)
9487 s = bfd_get_section_by_name (obfd, ".toc");
9488 if (s == NULL)
9489 s = bfd_get_section_by_name (obfd, ".tocbss");
9490 if (s == NULL)
9491 s = bfd_get_section_by_name (obfd, ".plt");
9492 if (s == NULL)
9493 {
9494 /* This may happen for
9495 o references to TOC base (SYM@toc / TOC[tc0]) without a
9496 .toc directive
9497 o bad linker script
9498 o --gc-sections and empty TOC sections
9499
9500 FIXME: Warn user? */
9501
9502 /* Look for a likely section. We probably won't even be
9503 using TOCstart. */
9504 for (s = obfd->sections; s != NULL; s = s->next)
9505 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9506 == (SEC_ALLOC | SEC_SMALL_DATA))
9507 break;
9508 if (s == NULL)
9509 for (s = obfd->sections; s != NULL; s = s->next)
9510 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9511 == (SEC_ALLOC | SEC_SMALL_DATA))
9512 break;
9513 if (s == NULL)
9514 for (s = obfd->sections; s != NULL; s = s->next)
9515 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9516 break;
9517 if (s == NULL)
9518 for (s = obfd->sections; s != NULL; s = s->next)
9519 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9520 break;
9521 }
9522
9523 TOCstart = 0;
9524 if (s != NULL)
9525 TOCstart = s->output_section->vma + s->output_offset;
9526
9527 return TOCstart;
9528 }
9529
9530 /* Build all the stubs associated with the current output file.
9531 The stubs are kept in a hash table attached to the main linker
9532 hash table. This function is called via gldelf64ppc_finish. */
9533
9534 bfd_boolean
9535 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9536 struct bfd_link_info *info,
9537 char **stats)
9538 {
9539 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9540 asection *stub_sec;
9541 bfd_byte *p;
9542 int stub_sec_count = 0;
9543
9544 htab->emit_stub_syms = emit_stub_syms;
9545
9546 /* Allocate memory to hold the linker stubs. */
9547 for (stub_sec = htab->stub_bfd->sections;
9548 stub_sec != NULL;
9549 stub_sec = stub_sec->next)
9550 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9551 && stub_sec->size != 0)
9552 {
9553 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9554 if (stub_sec->contents == NULL)
9555 return FALSE;
9556 /* We want to check that built size is the same as calculated
9557 size. rawsize is a convenient location to use. */
9558 stub_sec->rawsize = stub_sec->size;
9559 stub_sec->size = 0;
9560 }
9561
9562 if (htab->glink != NULL && htab->glink->size != 0)
9563 {
9564 unsigned int indx;
9565 bfd_vma plt0;
9566
9567 /* Build the .glink plt call stub. */
9568 if (htab->emit_stub_syms)
9569 {
9570 struct elf_link_hash_entry *h;
9571 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9572 if (h == NULL)
9573 return FALSE;
9574 if (h->root.type == bfd_link_hash_new)
9575 {
9576 h->root.type = bfd_link_hash_defined;
9577 h->root.u.def.section = htab->glink;
9578 h->root.u.def.value = 8;
9579 h->ref_regular = 1;
9580 h->def_regular = 1;
9581 h->ref_regular_nonweak = 1;
9582 h->forced_local = 1;
9583 h->non_elf = 0;
9584 }
9585 }
9586 p = htab->glink->contents;
9587 plt0 = (htab->plt->output_section->vma
9588 + htab->plt->output_offset
9589 - (htab->glink->output_section->vma
9590 + htab->glink->output_offset
9591 + 16));
9592 bfd_put_64 (htab->glink->owner, plt0, p);
9593 p += 8;
9594 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9595 p += 4;
9596 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9597 p += 4;
9598 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9599 p += 4;
9600 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9601 p += 4;
9602 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9603 p += 4;
9604 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9605 p += 4;
9606 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9607 p += 4;
9608 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9609 p += 4;
9610 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9611 p += 4;
9612 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9613 p += 4;
9614 bfd_put_32 (htab->glink->owner, BCTR, p);
9615 p += 4;
9616 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9617 {
9618 bfd_put_32 (htab->glink->owner, NOP, p);
9619 p += 4;
9620 }
9621
9622 /* Build the .glink lazy link call stubs. */
9623 indx = 0;
9624 while (p < htab->glink->contents + htab->glink->size)
9625 {
9626 if (indx < 0x8000)
9627 {
9628 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9629 p += 4;
9630 }
9631 else
9632 {
9633 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9634 p += 4;
9635 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9636 p += 4;
9637 }
9638 bfd_put_32 (htab->glink->owner,
9639 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9640 indx++;
9641 p += 4;
9642 }
9643 htab->glink->rawsize = p - htab->glink->contents;
9644 }
9645
9646 if (htab->brlt->size != 0)
9647 {
9648 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9649 htab->brlt->size);
9650 if (htab->brlt->contents == NULL)
9651 return FALSE;
9652 }
9653 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9654 {
9655 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9656 htab->relbrlt->size);
9657 if (htab->relbrlt->contents == NULL)
9658 return FALSE;
9659 }
9660
9661 /* Build the stubs as directed by the stub hash table. */
9662 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9663
9664 if (htab->relbrlt != NULL)
9665 htab->relbrlt->reloc_count = 0;
9666
9667 for (stub_sec = htab->stub_bfd->sections;
9668 stub_sec != NULL;
9669 stub_sec = stub_sec->next)
9670 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9671 {
9672 stub_sec_count += 1;
9673 if (stub_sec->rawsize != stub_sec->size)
9674 break;
9675 }
9676
9677 if (stub_sec != NULL
9678 || htab->glink->rawsize != htab->glink->size)
9679 {
9680 htab->stub_error = TRUE;
9681 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9682 }
9683
9684 if (htab->stub_error)
9685 return FALSE;
9686
9687 if (stats != NULL)
9688 {
9689 *stats = bfd_malloc (500);
9690 if (*stats == NULL)
9691 return FALSE;
9692
9693 sprintf (*stats, _("linker stubs in %u group%s\n"
9694 " branch %lu\n"
9695 " toc adjust %lu\n"
9696 " long branch %lu\n"
9697 " long toc adj %lu\n"
9698 " plt call %lu"),
9699 stub_sec_count,
9700 stub_sec_count == 1 ? "" : "s",
9701 htab->stub_count[ppc_stub_long_branch - 1],
9702 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9703 htab->stub_count[ppc_stub_plt_branch - 1],
9704 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9705 htab->stub_count[ppc_stub_plt_call - 1]);
9706 }
9707 return TRUE;
9708 }
9709
9710 /* This function undoes the changes made by add_symbol_adjust. */
9711
9712 static bfd_boolean
9713 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9714 {
9715 struct ppc_link_hash_entry *eh;
9716
9717 if (h->root.type == bfd_link_hash_indirect)
9718 return TRUE;
9719
9720 if (h->root.type == bfd_link_hash_warning)
9721 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9722
9723 eh = (struct ppc_link_hash_entry *) h;
9724 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9725 return TRUE;
9726
9727 eh->elf.root.type = bfd_link_hash_undefined;
9728 return TRUE;
9729 }
9730
9731 void
9732 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9733 {
9734 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9735 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9736 }
9737
9738 /* What to do when ld finds relocations against symbols defined in
9739 discarded sections. */
9740
9741 static unsigned int
9742 ppc64_elf_action_discarded (asection *sec)
9743 {
9744 if (strcmp (".opd", sec->name) == 0)
9745 return 0;
9746
9747 if (strcmp (".toc", sec->name) == 0)
9748 return 0;
9749
9750 if (strcmp (".toc1", sec->name) == 0)
9751 return 0;
9752
9753 return _bfd_elf_default_action_discarded (sec);
9754 }
9755
9756 /* The RELOCATE_SECTION function is called by the ELF backend linker
9757 to handle the relocations for a section.
9758
9759 The relocs are always passed as Rela structures; if the section
9760 actually uses Rel structures, the r_addend field will always be
9761 zero.
9762
9763 This function is responsible for adjust the section contents as
9764 necessary, and (if using Rela relocs and generating a
9765 relocatable output file) adjusting the reloc addend as
9766 necessary.
9767
9768 This function does not have to worry about setting the reloc
9769 address or the reloc symbol index.
9770
9771 LOCAL_SYMS is a pointer to the swapped in local symbols.
9772
9773 LOCAL_SECTIONS is an array giving the section in the input file
9774 corresponding to the st_shndx field of each local symbol.
9775
9776 The global hash table entry for the global symbols can be found
9777 via elf_sym_hashes (input_bfd).
9778
9779 When generating relocatable output, this function must handle
9780 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9781 going to be the section symbol corresponding to the output
9782 section, which means that the addend must be adjusted
9783 accordingly. */
9784
9785 static bfd_boolean
9786 ppc64_elf_relocate_section (bfd *output_bfd,
9787 struct bfd_link_info *info,
9788 bfd *input_bfd,
9789 asection *input_section,
9790 bfd_byte *contents,
9791 Elf_Internal_Rela *relocs,
9792 Elf_Internal_Sym *local_syms,
9793 asection **local_sections)
9794 {
9795 struct ppc_link_hash_table *htab;
9796 Elf_Internal_Shdr *symtab_hdr;
9797 struct elf_link_hash_entry **sym_hashes;
9798 Elf_Internal_Rela *rel;
9799 Elf_Internal_Rela *relend;
9800 Elf_Internal_Rela outrel;
9801 bfd_byte *loc;
9802 struct got_entry **local_got_ents;
9803 bfd_vma TOCstart;
9804 bfd_boolean ret = TRUE;
9805 bfd_boolean is_opd;
9806 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9807 bfd_boolean is_power4 = FALSE;
9808 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
9809
9810 /* Initialize howto table if needed. */
9811 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9812 ppc_howto_init ();
9813
9814 htab = ppc_hash_table (info);
9815
9816 /* Don't relocate stub sections. */
9817 if (input_section->owner == htab->stub_bfd)
9818 return TRUE;
9819
9820 local_got_ents = elf_local_got_ents (input_bfd);
9821 TOCstart = elf_gp (output_bfd);
9822 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9823 sym_hashes = elf_sym_hashes (input_bfd);
9824 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
9825
9826 rel = relocs;
9827 relend = relocs + input_section->reloc_count;
9828 for (; rel < relend; rel++)
9829 {
9830 enum elf_ppc64_reloc_type r_type;
9831 bfd_vma addend, orig_addend;
9832 bfd_reloc_status_type r;
9833 Elf_Internal_Sym *sym;
9834 asection *sec;
9835 struct elf_link_hash_entry *h_elf;
9836 struct ppc_link_hash_entry *h;
9837 struct ppc_link_hash_entry *fdh;
9838 const char *sym_name;
9839 unsigned long r_symndx, toc_symndx;
9840 char tls_mask, tls_gd, tls_type;
9841 char sym_type;
9842 bfd_vma relocation;
9843 bfd_boolean unresolved_reloc;
9844 bfd_boolean warned;
9845 unsigned long insn, mask;
9846 struct ppc_stub_hash_entry *stub_entry;
9847 bfd_vma max_br_offset;
9848 bfd_vma from;
9849
9850 r_type = ELF64_R_TYPE (rel->r_info);
9851 r_symndx = ELF64_R_SYM (rel->r_info);
9852
9853 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9854 symbol of the previous ADDR64 reloc. The symbol gives us the
9855 proper TOC base to use. */
9856 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9857 && rel != relocs
9858 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9859 && is_opd)
9860 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9861
9862 sym = NULL;
9863 sec = NULL;
9864 h_elf = NULL;
9865 sym_name = NULL;
9866 unresolved_reloc = FALSE;
9867 warned = FALSE;
9868 orig_addend = rel->r_addend;
9869
9870 if (r_symndx < symtab_hdr->sh_info)
9871 {
9872 /* It's a local symbol. */
9873 long *opd_adjust;
9874
9875 sym = local_syms + r_symndx;
9876 sec = local_sections[r_symndx];
9877 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9878 sym_type = ELF64_ST_TYPE (sym->st_info);
9879 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9880 opd_adjust = get_opd_info (sec);
9881 if (opd_adjust != NULL)
9882 {
9883 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9884 if (adjust == -1)
9885 relocation = 0;
9886 else
9887 {
9888 /* If this is a relocation against the opd section sym
9889 and we have edited .opd, adjust the reloc addend so
9890 that ld -r and ld --emit-relocs output is correct.
9891 If it is a reloc against some other .opd symbol,
9892 then the symbol value will be adjusted later. */
9893 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9894 rel->r_addend += adjust;
9895 else
9896 relocation += adjust;
9897 }
9898 }
9899 }
9900 else
9901 {
9902 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9903 r_symndx, symtab_hdr, sym_hashes,
9904 h_elf, sec, relocation,
9905 unresolved_reloc, warned);
9906 sym_name = h_elf->root.root.string;
9907 sym_type = h_elf->type;
9908 }
9909 h = (struct ppc_link_hash_entry *) h_elf;
9910
9911 if (sec != NULL && elf_discarded_section (sec))
9912 {
9913 /* For relocs against symbols from removed linkonce sections,
9914 or sections discarded by a linker script, we just want the
9915 section contents zeroed. Avoid any special processing. */
9916 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
9917 contents + rel->r_offset);
9918 rel->r_info = 0;
9919 rel->r_addend = 0;
9920 continue;
9921 }
9922
9923 if (info->relocatable)
9924 continue;
9925
9926 /* TLS optimizations. Replace instruction sequences and relocs
9927 based on information we collected in tls_optimize. We edit
9928 RELOCS so that --emit-relocs will output something sensible
9929 for the final instruction stream. */
9930 tls_mask = 0;
9931 tls_gd = 0;
9932 toc_symndx = 0;
9933 if (IS_PPC64_TLS_RELOC (r_type))
9934 {
9935 if (h != NULL)
9936 tls_mask = h->tls_mask;
9937 else if (local_got_ents != NULL)
9938 {
9939 char *lgot_masks;
9940 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9941 tls_mask = lgot_masks[r_symndx];
9942 }
9943 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9944 {
9945 /* Check for toc tls entries. */
9946 char *toc_tls;
9947
9948 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9949 rel, input_bfd))
9950 return FALSE;
9951
9952 if (toc_tls)
9953 tls_mask = *toc_tls;
9954 }
9955 }
9956
9957 /* Check that tls relocs are used with tls syms, and non-tls
9958 relocs are used with non-tls syms. */
9959 if (r_symndx != 0
9960 && r_type != R_PPC64_NONE
9961 && (h == NULL
9962 || h->elf.root.type == bfd_link_hash_defined
9963 || h->elf.root.type == bfd_link_hash_defweak)
9964 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9965 {
9966 if (r_type == R_PPC64_TLS && tls_mask != 0)
9967 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9968 ;
9969 else
9970 (*_bfd_error_handler)
9971 (sym_type == STT_TLS
9972 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9973 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9974 input_bfd,
9975 input_section,
9976 (long) rel->r_offset,
9977 ppc64_elf_howto_table[r_type]->name,
9978 sym_name);
9979 }
9980
9981 /* Ensure reloc mapping code below stays sane. */
9982 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9983 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9984 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9985 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9986 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9987 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9988 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9989 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9990 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9991 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9992 abort ();
9993
9994 switch (r_type)
9995 {
9996 default:
9997 break;
9998
9999 case R_PPC64_TOC16:
10000 case R_PPC64_TOC16_LO:
10001 case R_PPC64_TOC16_DS:
10002 case R_PPC64_TOC16_LO_DS:
10003 {
10004 /* Check for toc tls entries. */
10005 char *toc_tls;
10006 int retval;
10007
10008 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10009 rel, input_bfd);
10010 if (retval == 0)
10011 return FALSE;
10012
10013 if (toc_tls)
10014 {
10015 tls_mask = *toc_tls;
10016 if (r_type == R_PPC64_TOC16_DS
10017 || r_type == R_PPC64_TOC16_LO_DS)
10018 {
10019 if (tls_mask != 0
10020 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10021 goto toctprel;
10022 }
10023 else
10024 {
10025 /* If we found a GD reloc pair, then we might be
10026 doing a GD->IE transition. */
10027 if (retval == 2)
10028 {
10029 tls_gd = TLS_TPRELGD;
10030 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10031 goto tls_get_addr_check;
10032 }
10033 else if (retval == 3)
10034 {
10035 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10036 goto tls_get_addr_check;
10037 }
10038 }
10039 }
10040 }
10041 break;
10042
10043 case R_PPC64_GOT_TPREL16_DS:
10044 case R_PPC64_GOT_TPREL16_LO_DS:
10045 if (tls_mask != 0
10046 && (tls_mask & TLS_TPREL) == 0)
10047 {
10048 toctprel:
10049 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10050 insn &= 31 << 21;
10051 insn |= 0x3c0d0000; /* addis 0,13,0 */
10052 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10053 r_type = R_PPC64_TPREL16_HA;
10054 if (toc_symndx != 0)
10055 {
10056 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10057 /* We changed the symbol. Start over in order to
10058 get h, sym, sec etc. right. */
10059 rel--;
10060 continue;
10061 }
10062 else
10063 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10064 }
10065 break;
10066
10067 case R_PPC64_TLS:
10068 if (tls_mask != 0
10069 && (tls_mask & TLS_TPREL) == 0)
10070 {
10071 bfd_vma rtra;
10072 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10073 if ((insn & ((0x3f << 26) | (31 << 11)))
10074 == ((31 << 26) | (13 << 11)))
10075 rtra = insn & ((1 << 26) - (1 << 16));
10076 else if ((insn & ((0x3f << 26) | (31 << 16)))
10077 == ((31 << 26) | (13 << 16)))
10078 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10079 else
10080 abort ();
10081 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10082 /* add -> addi. */
10083 insn = 14 << 26;
10084 else if ((insn & (31 << 1)) == 23 << 1
10085 && ((insn & (31 << 6)) < 14 << 6
10086 || ((insn & (31 << 6)) >= 16 << 6
10087 && (insn & (31 << 6)) < 24 << 6)))
10088 /* load and store indexed -> dform. */
10089 insn = (32 | ((insn >> 6) & 31)) << 26;
10090 else if ((insn & (31 << 1)) == 21 << 1
10091 && (insn & (0x1a << 6)) == 0)
10092 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10093 insn = (((58 | ((insn >> 6) & 4)) << 26)
10094 | ((insn >> 6) & 1));
10095 else if ((insn & (31 << 1)) == 21 << 1
10096 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10097 /* lwax -> lwa. */
10098 insn = (58 << 26) | 2;
10099 else
10100 abort ();
10101 insn |= rtra;
10102 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10103 /* Was PPC64_TLS which sits on insn boundary, now
10104 PPC64_TPREL16_LO which is at low-order half-word. */
10105 rel->r_offset += d_offset;
10106 r_type = R_PPC64_TPREL16_LO;
10107 if (toc_symndx != 0)
10108 {
10109 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10110 /* We changed the symbol. Start over in order to
10111 get h, sym, sec etc. right. */
10112 rel--;
10113 continue;
10114 }
10115 else
10116 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10117 }
10118 break;
10119
10120 case R_PPC64_GOT_TLSGD16_HI:
10121 case R_PPC64_GOT_TLSGD16_HA:
10122 tls_gd = TLS_TPRELGD;
10123 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10124 goto tls_gdld_hi;
10125 break;
10126
10127 case R_PPC64_GOT_TLSLD16_HI:
10128 case R_PPC64_GOT_TLSLD16_HA:
10129 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10130 {
10131 tls_gdld_hi:
10132 if ((tls_mask & tls_gd) != 0)
10133 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10134 + R_PPC64_GOT_TPREL16_DS);
10135 else
10136 {
10137 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10138 rel->r_offset -= d_offset;
10139 r_type = R_PPC64_NONE;
10140 }
10141 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10142 }
10143 break;
10144
10145 case R_PPC64_GOT_TLSGD16:
10146 case R_PPC64_GOT_TLSGD16_LO:
10147 tls_gd = TLS_TPRELGD;
10148 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10149 goto tls_get_addr_check;
10150 break;
10151
10152 case R_PPC64_GOT_TLSLD16:
10153 case R_PPC64_GOT_TLSLD16_LO:
10154 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10155 {
10156 tls_get_addr_check:
10157 if (rel + 1 < relend)
10158 {
10159 enum elf_ppc64_reloc_type r_type2;
10160 unsigned long r_symndx2;
10161 struct elf_link_hash_entry *h2;
10162 bfd_vma insn1, insn2, insn3;
10163 bfd_vma offset;
10164
10165 /* The next instruction should be a call to
10166 __tls_get_addr. Peek at the reloc to be sure. */
10167 r_type2 = ELF64_R_TYPE (rel[1].r_info);
10168 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
10169 if (r_symndx2 < symtab_hdr->sh_info
10170 || (r_type2 != R_PPC64_REL14
10171 && r_type2 != R_PPC64_REL14_BRTAKEN
10172 && r_type2 != R_PPC64_REL14_BRNTAKEN
10173 && r_type2 != R_PPC64_REL24))
10174 break;
10175
10176 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
10177 while (h2->root.type == bfd_link_hash_indirect
10178 || h2->root.type == bfd_link_hash_warning)
10179 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
10180 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
10181 && h2 != &htab->tls_get_addr_fd->elf))
10182 break;
10183
10184 /* OK, it checks out. Replace the call. */
10185 offset = rel[1].r_offset;
10186 insn1 = bfd_get_32 (output_bfd,
10187 contents + rel->r_offset - d_offset);
10188 insn3 = bfd_get_32 (output_bfd,
10189 contents + offset + 4);
10190 if ((tls_mask & tls_gd) != 0)
10191 {
10192 /* IE */
10193 insn1 &= (1 << 26) - (1 << 2);
10194 insn1 |= 58 << 26; /* ld */
10195 insn2 = 0x7c636a14; /* add 3,3,13 */
10196 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
10197 if ((tls_mask & TLS_EXPLICIT) == 0)
10198 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10199 + R_PPC64_GOT_TPREL16_DS);
10200 else
10201 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10202 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10203 }
10204 else
10205 {
10206 /* LE */
10207 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10208 insn2 = 0x38630000; /* addi 3,3,0 */
10209 if (tls_gd == 0)
10210 {
10211 /* Was an LD reloc. */
10212 r_symndx = 0;
10213 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10214 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10215 }
10216 else if (toc_symndx != 0)
10217 r_symndx = toc_symndx;
10218 r_type = R_PPC64_TPREL16_HA;
10219 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10220 rel[1].r_info = ELF64_R_INFO (r_symndx,
10221 R_PPC64_TPREL16_LO);
10222 rel[1].r_offset += d_offset;
10223 }
10224 if (insn3 == NOP
10225 || insn3 == CROR_151515 || insn3 == CROR_313131)
10226 {
10227 insn3 = insn2;
10228 insn2 = NOP;
10229 rel[1].r_offset += 4;
10230 }
10231 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
10232 bfd_put_32 (output_bfd, insn2, contents + offset);
10233 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10234 if (tls_gd == 0 || toc_symndx != 0)
10235 {
10236 /* We changed the symbol. Start over in order
10237 to get h, sym, sec etc. right. */
10238 rel--;
10239 continue;
10240 }
10241 }
10242 }
10243 break;
10244
10245 case R_PPC64_DTPMOD64:
10246 if (rel + 1 < relend
10247 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10248 && rel[1].r_offset == rel->r_offset + 8)
10249 {
10250 if ((tls_mask & TLS_GD) == 0)
10251 {
10252 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10253 if ((tls_mask & TLS_TPRELGD) != 0)
10254 r_type = R_PPC64_TPREL64;
10255 else
10256 {
10257 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10258 r_type = R_PPC64_NONE;
10259 }
10260 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10261 }
10262 }
10263 else
10264 {
10265 if ((tls_mask & TLS_LD) == 0)
10266 {
10267 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10268 r_type = R_PPC64_NONE;
10269 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10270 }
10271 }
10272 break;
10273
10274 case R_PPC64_TPREL64:
10275 if ((tls_mask & TLS_TPREL) == 0)
10276 {
10277 r_type = R_PPC64_NONE;
10278 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10279 }
10280 break;
10281 }
10282
10283 /* Handle other relocations that tweak non-addend part of insn. */
10284 insn = 0;
10285 max_br_offset = 1 << 25;
10286 addend = rel->r_addend;
10287 switch (r_type)
10288 {
10289 default:
10290 break;
10291
10292 /* Branch taken prediction relocations. */
10293 case R_PPC64_ADDR14_BRTAKEN:
10294 case R_PPC64_REL14_BRTAKEN:
10295 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10296 /* Fall thru. */
10297
10298 /* Branch not taken prediction relocations. */
10299 case R_PPC64_ADDR14_BRNTAKEN:
10300 case R_PPC64_REL14_BRNTAKEN:
10301 insn |= bfd_get_32 (output_bfd,
10302 contents + rel->r_offset) & ~(0x01 << 21);
10303 /* Fall thru. */
10304
10305 case R_PPC64_REL14:
10306 max_br_offset = 1 << 15;
10307 /* Fall thru. */
10308
10309 case R_PPC64_REL24:
10310 /* Calls to functions with a different TOC, such as calls to
10311 shared objects, need to alter the TOC pointer. This is
10312 done using a linkage stub. A REL24 branching to these
10313 linkage stubs needs to be followed by a nop, as the nop
10314 will be replaced with an instruction to restore the TOC
10315 base pointer. */
10316 stub_entry = NULL;
10317 fdh = h;
10318 if (((h != NULL
10319 && (((fdh = h->oh) != NULL
10320 && fdh->elf.plt.plist != NULL)
10321 || (fdh = h)->elf.plt.plist != NULL))
10322 || (sec != NULL
10323 && sec->output_section != NULL
10324 && sec->id <= htab->top_id
10325 && (htab->stub_group[sec->id].toc_off
10326 != htab->stub_group[input_section->id].toc_off)))
10327 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10328 rel, htab)) != NULL
10329 && (stub_entry->stub_type == ppc_stub_plt_call
10330 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10331 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10332 {
10333 bfd_boolean can_plt_call = FALSE;
10334
10335 if (rel->r_offset + 8 <= input_section->size)
10336 {
10337 unsigned long nop;
10338 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10339 if (nop == NOP
10340 || nop == CROR_151515 || nop == CROR_313131)
10341 {
10342 bfd_put_32 (input_bfd, LD_R2_40R1,
10343 contents + rel->r_offset + 4);
10344 can_plt_call = TRUE;
10345 }
10346 }
10347
10348 if (!can_plt_call)
10349 {
10350 if (stub_entry->stub_type == ppc_stub_plt_call)
10351 {
10352 /* If this is a plain branch rather than a branch
10353 and link, don't require a nop. However, don't
10354 allow tail calls in a shared library as they
10355 will result in r2 being corrupted. */
10356 unsigned long br;
10357 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10358 if (info->executable && (br & 1) == 0)
10359 can_plt_call = TRUE;
10360 else
10361 stub_entry = NULL;
10362 }
10363 else if (h != NULL
10364 && strcmp (h->elf.root.root.string,
10365 ".__libc_start_main") == 0)
10366 {
10367 /* Allow crt1 branch to go via a toc adjusting stub. */
10368 can_plt_call = TRUE;
10369 }
10370 else
10371 {
10372 if (strcmp (input_section->output_section->name,
10373 ".init") == 0
10374 || strcmp (input_section->output_section->name,
10375 ".fini") == 0)
10376 (*_bfd_error_handler)
10377 (_("%B(%A+0x%lx): automatic multiple TOCs "
10378 "not supported using your crt files; "
10379 "recompile with -mminimal-toc or upgrade gcc"),
10380 input_bfd,
10381 input_section,
10382 (long) rel->r_offset);
10383 else
10384 (*_bfd_error_handler)
10385 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10386 "does not allow automatic multiple TOCs; "
10387 "recompile with -mminimal-toc or "
10388 "-fno-optimize-sibling-calls, "
10389 "or make `%s' extern"),
10390 input_bfd,
10391 input_section,
10392 (long) rel->r_offset,
10393 sym_name,
10394 sym_name);
10395 bfd_set_error (bfd_error_bad_value);
10396 ret = FALSE;
10397 }
10398 }
10399
10400 if (can_plt_call
10401 && stub_entry->stub_type == ppc_stub_plt_call)
10402 unresolved_reloc = FALSE;
10403 }
10404
10405 if (stub_entry == NULL
10406 && get_opd_info (sec) != NULL)
10407 {
10408 /* The branch destination is the value of the opd entry. */
10409 bfd_vma off = (relocation + addend
10410 - sec->output_section->vma
10411 - sec->output_offset);
10412 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10413 if (dest != (bfd_vma) -1)
10414 {
10415 relocation = dest;
10416 addend = 0;
10417 }
10418 }
10419
10420 /* If the branch is out of reach we ought to have a long
10421 branch stub. */
10422 from = (rel->r_offset
10423 + input_section->output_offset
10424 + input_section->output_section->vma);
10425
10426 if (stub_entry == NULL
10427 && (relocation + addend - from + max_br_offset
10428 >= 2 * max_br_offset)
10429 && r_type != R_PPC64_ADDR14_BRTAKEN
10430 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10431 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10432 htab);
10433
10434 if (stub_entry != NULL)
10435 {
10436 /* Munge up the value and addend so that we call the stub
10437 rather than the procedure directly. */
10438 relocation = (stub_entry->stub_offset
10439 + stub_entry->stub_sec->output_offset
10440 + stub_entry->stub_sec->output_section->vma);
10441 addend = 0;
10442 }
10443
10444 if (insn != 0)
10445 {
10446 if (is_power4)
10447 {
10448 /* Set 'a' bit. This is 0b00010 in BO field for branch
10449 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10450 for branch on CTR insns (BO == 1a00t or 1a01t). */
10451 if ((insn & (0x14 << 21)) == (0x04 << 21))
10452 insn |= 0x02 << 21;
10453 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10454 insn |= 0x08 << 21;
10455 else
10456 break;
10457 }
10458 else
10459 {
10460 /* Invert 'y' bit if not the default. */
10461 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10462 insn ^= 0x01 << 21;
10463 }
10464
10465 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10466 }
10467
10468 /* NOP out calls to undefined weak functions.
10469 We can thus call a weak function without first
10470 checking whether the function is defined. */
10471 else if (h != NULL
10472 && h->elf.root.type == bfd_link_hash_undefweak
10473 && r_type == R_PPC64_REL24
10474 && relocation == 0
10475 && addend == 0)
10476 {
10477 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10478 continue;
10479 }
10480 break;
10481 }
10482
10483 /* Set `addend'. */
10484 tls_type = 0;
10485 switch (r_type)
10486 {
10487 default:
10488 (*_bfd_error_handler)
10489 (_("%B: unknown relocation type %d for symbol %s"),
10490 input_bfd, (int) r_type, sym_name);
10491
10492 bfd_set_error (bfd_error_bad_value);
10493 ret = FALSE;
10494 continue;
10495
10496 case R_PPC64_NONE:
10497 case R_PPC64_TLS:
10498 case R_PPC64_GNU_VTINHERIT:
10499 case R_PPC64_GNU_VTENTRY:
10500 continue;
10501
10502 /* GOT16 relocations. Like an ADDR16 using the symbol's
10503 address in the GOT as relocation value instead of the
10504 symbol's value itself. Also, create a GOT entry for the
10505 symbol and put the symbol value there. */
10506 case R_PPC64_GOT_TLSGD16:
10507 case R_PPC64_GOT_TLSGD16_LO:
10508 case R_PPC64_GOT_TLSGD16_HI:
10509 case R_PPC64_GOT_TLSGD16_HA:
10510 tls_type = TLS_TLS | TLS_GD;
10511 goto dogot;
10512
10513 case R_PPC64_GOT_TLSLD16:
10514 case R_PPC64_GOT_TLSLD16_LO:
10515 case R_PPC64_GOT_TLSLD16_HI:
10516 case R_PPC64_GOT_TLSLD16_HA:
10517 tls_type = TLS_TLS | TLS_LD;
10518 goto dogot;
10519
10520 case R_PPC64_GOT_TPREL16_DS:
10521 case R_PPC64_GOT_TPREL16_LO_DS:
10522 case R_PPC64_GOT_TPREL16_HI:
10523 case R_PPC64_GOT_TPREL16_HA:
10524 tls_type = TLS_TLS | TLS_TPREL;
10525 goto dogot;
10526
10527 case R_PPC64_GOT_DTPREL16_DS:
10528 case R_PPC64_GOT_DTPREL16_LO_DS:
10529 case R_PPC64_GOT_DTPREL16_HI:
10530 case R_PPC64_GOT_DTPREL16_HA:
10531 tls_type = TLS_TLS | TLS_DTPREL;
10532 goto dogot;
10533
10534 case R_PPC64_GOT16:
10535 case R_PPC64_GOT16_LO:
10536 case R_PPC64_GOT16_HI:
10537 case R_PPC64_GOT16_HA:
10538 case R_PPC64_GOT16_DS:
10539 case R_PPC64_GOT16_LO_DS:
10540 dogot:
10541 {
10542 /* Relocation is to the entry for this symbol in the global
10543 offset table. */
10544 asection *got;
10545 bfd_vma *offp;
10546 bfd_vma off;
10547 unsigned long indx = 0;
10548
10549 if (tls_type == (TLS_TLS | TLS_LD)
10550 && (h == NULL
10551 || !h->elf.def_dynamic))
10552 offp = &ppc64_tlsld_got (input_bfd)->offset;
10553 else
10554 {
10555 struct got_entry *ent;
10556
10557 if (h != NULL)
10558 {
10559 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10560 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10561 &h->elf)
10562 || (info->shared
10563 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10564 /* This is actually a static link, or it is a
10565 -Bsymbolic link and the symbol is defined
10566 locally, or the symbol was forced to be local
10567 because of a version file. */
10568 ;
10569 else
10570 {
10571 indx = h->elf.dynindx;
10572 unresolved_reloc = FALSE;
10573 }
10574 ent = h->elf.got.glist;
10575 }
10576 else
10577 {
10578 if (local_got_ents == NULL)
10579 abort ();
10580 ent = local_got_ents[r_symndx];
10581 }
10582
10583 for (; ent != NULL; ent = ent->next)
10584 if (ent->addend == orig_addend
10585 && ent->owner == input_bfd
10586 && ent->tls_type == tls_type)
10587 break;
10588 if (ent == NULL)
10589 abort ();
10590 offp = &ent->got.offset;
10591 }
10592
10593 got = ppc64_elf_tdata (input_bfd)->got;
10594 if (got == NULL)
10595 abort ();
10596
10597 /* The offset must always be a multiple of 8. We use the
10598 least significant bit to record whether we have already
10599 processed this entry. */
10600 off = *offp;
10601 if ((off & 1) != 0)
10602 off &= ~1;
10603 else
10604 {
10605 /* Generate relocs for the dynamic linker, except in
10606 the case of TLSLD where we'll use one entry per
10607 module. */
10608 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10609
10610 *offp = off | 1;
10611 if ((info->shared || indx != 0)
10612 && (h == NULL
10613 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10614 || h->elf.root.type != bfd_link_hash_undefweak))
10615 {
10616 outrel.r_offset = (got->output_section->vma
10617 + got->output_offset
10618 + off);
10619 outrel.r_addend = addend;
10620 if (tls_type & (TLS_LD | TLS_GD))
10621 {
10622 outrel.r_addend = 0;
10623 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10624 if (tls_type == (TLS_TLS | TLS_GD))
10625 {
10626 loc = relgot->contents;
10627 loc += (relgot->reloc_count++
10628 * sizeof (Elf64_External_Rela));
10629 bfd_elf64_swap_reloca_out (output_bfd,
10630 &outrel, loc);
10631 outrel.r_offset += 8;
10632 outrel.r_addend = addend;
10633 outrel.r_info
10634 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10635 }
10636 }
10637 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10638 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10639 else if (tls_type == (TLS_TLS | TLS_TPREL))
10640 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10641 else if (indx == 0)
10642 {
10643 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10644
10645 /* Write the .got section contents for the sake
10646 of prelink. */
10647 loc = got->contents + off;
10648 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10649 loc);
10650 }
10651 else
10652 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10653
10654 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10655 {
10656 outrel.r_addend += relocation;
10657 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10658 outrel.r_addend -= htab->elf.tls_sec->vma;
10659 }
10660 loc = relgot->contents;
10661 loc += (relgot->reloc_count++
10662 * sizeof (Elf64_External_Rela));
10663 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10664 }
10665
10666 /* Init the .got section contents here if we're not
10667 emitting a reloc. */
10668 else
10669 {
10670 relocation += addend;
10671 if (tls_type == (TLS_TLS | TLS_LD))
10672 relocation = 1;
10673 else if (tls_type != 0)
10674 {
10675 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10676 if (tls_type == (TLS_TLS | TLS_TPREL))
10677 relocation += DTP_OFFSET - TP_OFFSET;
10678
10679 if (tls_type == (TLS_TLS | TLS_GD))
10680 {
10681 bfd_put_64 (output_bfd, relocation,
10682 got->contents + off + 8);
10683 relocation = 1;
10684 }
10685 }
10686
10687 bfd_put_64 (output_bfd, relocation,
10688 got->contents + off);
10689 }
10690 }
10691
10692 if (off >= (bfd_vma) -2)
10693 abort ();
10694
10695 relocation = got->output_offset + off;
10696
10697 /* TOC base (r2) is TOC start plus 0x8000. */
10698 addend = -TOC_BASE_OFF;
10699 }
10700 break;
10701
10702 case R_PPC64_PLT16_HA:
10703 case R_PPC64_PLT16_HI:
10704 case R_PPC64_PLT16_LO:
10705 case R_PPC64_PLT32:
10706 case R_PPC64_PLT64:
10707 /* Relocation is to the entry for this symbol in the
10708 procedure linkage table. */
10709
10710 /* Resolve a PLT reloc against a local symbol directly,
10711 without using the procedure linkage table. */
10712 if (h == NULL)
10713 break;
10714
10715 /* It's possible that we didn't make a PLT entry for this
10716 symbol. This happens when statically linking PIC code,
10717 or when using -Bsymbolic. Go find a match if there is a
10718 PLT entry. */
10719 if (htab->plt != NULL)
10720 {
10721 struct plt_entry *ent;
10722 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10723 if (ent->addend == orig_addend
10724 && ent->plt.offset != (bfd_vma) -1)
10725 {
10726 relocation = (htab->plt->output_section->vma
10727 + htab->plt->output_offset
10728 + ent->plt.offset);
10729 unresolved_reloc = FALSE;
10730 }
10731 }
10732 break;
10733
10734 case R_PPC64_TOC:
10735 /* Relocation value is TOC base. */
10736 relocation = TOCstart;
10737 if (r_symndx == 0)
10738 relocation += htab->stub_group[input_section->id].toc_off;
10739 else if (unresolved_reloc)
10740 ;
10741 else if (sec != NULL && sec->id <= htab->top_id)
10742 relocation += htab->stub_group[sec->id].toc_off;
10743 else
10744 unresolved_reloc = TRUE;
10745 goto dodyn;
10746
10747 /* TOC16 relocs. We want the offset relative to the TOC base,
10748 which is the address of the start of the TOC plus 0x8000.
10749 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10750 in this order. */
10751 case R_PPC64_TOC16:
10752 case R_PPC64_TOC16_LO:
10753 case R_PPC64_TOC16_HI:
10754 case R_PPC64_TOC16_DS:
10755 case R_PPC64_TOC16_LO_DS:
10756 case R_PPC64_TOC16_HA:
10757 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10758 break;
10759
10760 /* Relocate against the beginning of the section. */
10761 case R_PPC64_SECTOFF:
10762 case R_PPC64_SECTOFF_LO:
10763 case R_PPC64_SECTOFF_HI:
10764 case R_PPC64_SECTOFF_DS:
10765 case R_PPC64_SECTOFF_LO_DS:
10766 case R_PPC64_SECTOFF_HA:
10767 if (sec != NULL)
10768 addend -= sec->output_section->vma;
10769 break;
10770
10771 case R_PPC64_REL14:
10772 case R_PPC64_REL14_BRNTAKEN:
10773 case R_PPC64_REL14_BRTAKEN:
10774 case R_PPC64_REL24:
10775 break;
10776
10777 case R_PPC64_TPREL16:
10778 case R_PPC64_TPREL16_LO:
10779 case R_PPC64_TPREL16_HI:
10780 case R_PPC64_TPREL16_HA:
10781 case R_PPC64_TPREL16_DS:
10782 case R_PPC64_TPREL16_LO_DS:
10783 case R_PPC64_TPREL16_HIGHER:
10784 case R_PPC64_TPREL16_HIGHERA:
10785 case R_PPC64_TPREL16_HIGHEST:
10786 case R_PPC64_TPREL16_HIGHESTA:
10787 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10788 if (info->shared)
10789 /* The TPREL16 relocs shouldn't really be used in shared
10790 libs as they will result in DT_TEXTREL being set, but
10791 support them anyway. */
10792 goto dodyn;
10793 break;
10794
10795 case R_PPC64_DTPREL16:
10796 case R_PPC64_DTPREL16_LO:
10797 case R_PPC64_DTPREL16_HI:
10798 case R_PPC64_DTPREL16_HA:
10799 case R_PPC64_DTPREL16_DS:
10800 case R_PPC64_DTPREL16_LO_DS:
10801 case R_PPC64_DTPREL16_HIGHER:
10802 case R_PPC64_DTPREL16_HIGHERA:
10803 case R_PPC64_DTPREL16_HIGHEST:
10804 case R_PPC64_DTPREL16_HIGHESTA:
10805 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10806 break;
10807
10808 case R_PPC64_DTPMOD64:
10809 relocation = 1;
10810 addend = 0;
10811 goto dodyn;
10812
10813 case R_PPC64_TPREL64:
10814 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10815 goto dodyn;
10816
10817 case R_PPC64_DTPREL64:
10818 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10819 /* Fall thru */
10820
10821 /* Relocations that may need to be propagated if this is a
10822 dynamic object. */
10823 case R_PPC64_REL30:
10824 case R_PPC64_REL32:
10825 case R_PPC64_REL64:
10826 case R_PPC64_ADDR14:
10827 case R_PPC64_ADDR14_BRNTAKEN:
10828 case R_PPC64_ADDR14_BRTAKEN:
10829 case R_PPC64_ADDR16:
10830 case R_PPC64_ADDR16_DS:
10831 case R_PPC64_ADDR16_HA:
10832 case R_PPC64_ADDR16_HI:
10833 case R_PPC64_ADDR16_HIGHER:
10834 case R_PPC64_ADDR16_HIGHERA:
10835 case R_PPC64_ADDR16_HIGHEST:
10836 case R_PPC64_ADDR16_HIGHESTA:
10837 case R_PPC64_ADDR16_LO:
10838 case R_PPC64_ADDR16_LO_DS:
10839 case R_PPC64_ADDR24:
10840 case R_PPC64_ADDR32:
10841 case R_PPC64_ADDR64:
10842 case R_PPC64_UADDR16:
10843 case R_PPC64_UADDR32:
10844 case R_PPC64_UADDR64:
10845 dodyn:
10846 if ((input_section->flags & SEC_ALLOC) == 0)
10847 break;
10848
10849 if (NO_OPD_RELOCS && is_opd)
10850 break;
10851
10852 if ((info->shared
10853 && (h == NULL
10854 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10855 || h->elf.root.type != bfd_link_hash_undefweak)
10856 && (MUST_BE_DYN_RELOC (r_type)
10857 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10858 || (ELIMINATE_COPY_RELOCS
10859 && !info->shared
10860 && h != NULL
10861 && h->elf.dynindx != -1
10862 && !h->elf.non_got_ref
10863 && h->elf.def_dynamic
10864 && !h->elf.def_regular))
10865 {
10866 Elf_Internal_Rela outrel;
10867 bfd_boolean skip, relocate;
10868 asection *sreloc;
10869 bfd_byte *loc;
10870 bfd_vma out_off;
10871
10872 /* When generating a dynamic object, these relocations
10873 are copied into the output file to be resolved at run
10874 time. */
10875
10876 skip = FALSE;
10877 relocate = FALSE;
10878
10879 out_off = _bfd_elf_section_offset (output_bfd, info,
10880 input_section, rel->r_offset);
10881 if (out_off == (bfd_vma) -1)
10882 skip = TRUE;
10883 else if (out_off == (bfd_vma) -2)
10884 skip = TRUE, relocate = TRUE;
10885 out_off += (input_section->output_section->vma
10886 + input_section->output_offset);
10887 outrel.r_offset = out_off;
10888 outrel.r_addend = rel->r_addend;
10889
10890 /* Optimize unaligned reloc use. */
10891 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10892 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10893 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10894 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10895 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10896 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10897 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10898 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10899 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10900
10901 if (skip)
10902 memset (&outrel, 0, sizeof outrel);
10903 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10904 && !is_opd
10905 && r_type != R_PPC64_TOC)
10906 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10907 else
10908 {
10909 /* This symbol is local, or marked to become local,
10910 or this is an opd section reloc which must point
10911 at a local function. */
10912 outrel.r_addend += relocation;
10913 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10914 {
10915 if (is_opd && h != NULL)
10916 {
10917 /* Lie about opd entries. This case occurs
10918 when building shared libraries and we
10919 reference a function in another shared
10920 lib. The same thing happens for a weak
10921 definition in an application that's
10922 overridden by a strong definition in a
10923 shared lib. (I believe this is a generic
10924 bug in binutils handling of weak syms.)
10925 In these cases we won't use the opd
10926 entry in this lib. */
10927 unresolved_reloc = FALSE;
10928 }
10929 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10930
10931 /* We need to relocate .opd contents for ld.so.
10932 Prelink also wants simple and consistent rules
10933 for relocs. This make all RELATIVE relocs have
10934 *r_offset equal to r_addend. */
10935 relocate = TRUE;
10936 }
10937 else
10938 {
10939 long indx = 0;
10940
10941 if (bfd_is_abs_section (sec))
10942 ;
10943 else if (sec == NULL || sec->owner == NULL)
10944 {
10945 bfd_set_error (bfd_error_bad_value);
10946 return FALSE;
10947 }
10948 else
10949 {
10950 asection *osec;
10951
10952 osec = sec->output_section;
10953 indx = elf_section_data (osec)->dynindx;
10954
10955 if (indx == 0)
10956 {
10957 if ((osec->flags & SEC_READONLY) == 0
10958 && htab->elf.data_index_section != NULL)
10959 osec = htab->elf.data_index_section;
10960 else
10961 osec = htab->elf.text_index_section;
10962 indx = elf_section_data (osec)->dynindx;
10963 }
10964 BFD_ASSERT (indx != 0);
10965
10966 /* We are turning this relocation into one
10967 against a section symbol, so subtract out
10968 the output section's address but not the
10969 offset of the input section in the output
10970 section. */
10971 outrel.r_addend -= osec->vma;
10972 }
10973
10974 outrel.r_info = ELF64_R_INFO (indx, r_type);
10975 }
10976 }
10977
10978 sreloc = elf_section_data (input_section)->sreloc;
10979 if (sreloc == NULL)
10980 abort ();
10981
10982 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
10983 >= sreloc->size)
10984 abort ();
10985 loc = sreloc->contents;
10986 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10987 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10988
10989 /* If this reloc is against an external symbol, it will
10990 be computed at runtime, so there's no need to do
10991 anything now. However, for the sake of prelink ensure
10992 that the section contents are a known value. */
10993 if (! relocate)
10994 {
10995 unresolved_reloc = FALSE;
10996 /* The value chosen here is quite arbitrary as ld.so
10997 ignores section contents except for the special
10998 case of .opd where the contents might be accessed
10999 before relocation. Choose zero, as that won't
11000 cause reloc overflow. */
11001 relocation = 0;
11002 addend = 0;
11003 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11004 to improve backward compatibility with older
11005 versions of ld. */
11006 if (r_type == R_PPC64_ADDR64)
11007 addend = outrel.r_addend;
11008 /* Adjust pc_relative relocs to have zero in *r_offset. */
11009 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11010 addend = (input_section->output_section->vma
11011 + input_section->output_offset
11012 + rel->r_offset);
11013 }
11014 }
11015 break;
11016
11017 case R_PPC64_COPY:
11018 case R_PPC64_GLOB_DAT:
11019 case R_PPC64_JMP_SLOT:
11020 case R_PPC64_RELATIVE:
11021 /* We shouldn't ever see these dynamic relocs in relocatable
11022 files. */
11023 /* Fall through. */
11024
11025 case R_PPC64_PLTGOT16:
11026 case R_PPC64_PLTGOT16_DS:
11027 case R_PPC64_PLTGOT16_HA:
11028 case R_PPC64_PLTGOT16_HI:
11029 case R_PPC64_PLTGOT16_LO:
11030 case R_PPC64_PLTGOT16_LO_DS:
11031 case R_PPC64_PLTREL32:
11032 case R_PPC64_PLTREL64:
11033 /* These ones haven't been implemented yet. */
11034
11035 (*_bfd_error_handler)
11036 (_("%B: relocation %s is not supported for symbol %s."),
11037 input_bfd,
11038 ppc64_elf_howto_table[r_type]->name, sym_name);
11039
11040 bfd_set_error (bfd_error_invalid_operation);
11041 ret = FALSE;
11042 continue;
11043 }
11044
11045 /* Do any further special processing. */
11046 switch (r_type)
11047 {
11048 default:
11049 break;
11050
11051 case R_PPC64_ADDR16_HA:
11052 case R_PPC64_ADDR16_HIGHERA:
11053 case R_PPC64_ADDR16_HIGHESTA:
11054 case R_PPC64_TOC16_HA:
11055 case R_PPC64_SECTOFF_HA:
11056 case R_PPC64_TPREL16_HA:
11057 case R_PPC64_DTPREL16_HA:
11058 case R_PPC64_TPREL16_HIGHER:
11059 case R_PPC64_TPREL16_HIGHERA:
11060 case R_PPC64_TPREL16_HIGHEST:
11061 case R_PPC64_TPREL16_HIGHESTA:
11062 case R_PPC64_DTPREL16_HIGHER:
11063 case R_PPC64_DTPREL16_HIGHERA:
11064 case R_PPC64_DTPREL16_HIGHEST:
11065 case R_PPC64_DTPREL16_HIGHESTA:
11066 /* It's just possible that this symbol is a weak symbol
11067 that's not actually defined anywhere. In that case,
11068 'sec' would be NULL, and we should leave the symbol
11069 alone (it will be set to zero elsewhere in the link). */
11070 if (sec == NULL)
11071 break;
11072 /* Fall thru */
11073
11074 case R_PPC64_GOT16_HA:
11075 case R_PPC64_PLTGOT16_HA:
11076 case R_PPC64_PLT16_HA:
11077 case R_PPC64_GOT_TLSGD16_HA:
11078 case R_PPC64_GOT_TLSLD16_HA:
11079 case R_PPC64_GOT_TPREL16_HA:
11080 case R_PPC64_GOT_DTPREL16_HA:
11081 /* Add 0x10000 if sign bit in 0:15 is set.
11082 Bits 0:15 are not used. */
11083 addend += 0x8000;
11084 break;
11085
11086 case R_PPC64_ADDR16_DS:
11087 case R_PPC64_ADDR16_LO_DS:
11088 case R_PPC64_GOT16_DS:
11089 case R_PPC64_GOT16_LO_DS:
11090 case R_PPC64_PLT16_LO_DS:
11091 case R_PPC64_SECTOFF_DS:
11092 case R_PPC64_SECTOFF_LO_DS:
11093 case R_PPC64_TOC16_DS:
11094 case R_PPC64_TOC16_LO_DS:
11095 case R_PPC64_PLTGOT16_DS:
11096 case R_PPC64_PLTGOT16_LO_DS:
11097 case R_PPC64_GOT_TPREL16_DS:
11098 case R_PPC64_GOT_TPREL16_LO_DS:
11099 case R_PPC64_GOT_DTPREL16_DS:
11100 case R_PPC64_GOT_DTPREL16_LO_DS:
11101 case R_PPC64_TPREL16_DS:
11102 case R_PPC64_TPREL16_LO_DS:
11103 case R_PPC64_DTPREL16_DS:
11104 case R_PPC64_DTPREL16_LO_DS:
11105 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11106 mask = 3;
11107 /* If this reloc is against an lq insn, then the value must be
11108 a multiple of 16. This is somewhat of a hack, but the
11109 "correct" way to do this by defining _DQ forms of all the
11110 _DS relocs bloats all reloc switches in this file. It
11111 doesn't seem to make much sense to use any of these relocs
11112 in data, so testing the insn should be safe. */
11113 if ((insn & (0x3f << 26)) == (56u << 26))
11114 mask = 15;
11115 if (((relocation + addend) & mask) != 0)
11116 {
11117 (*_bfd_error_handler)
11118 (_("%B: error: relocation %s not a multiple of %d"),
11119 input_bfd,
11120 ppc64_elf_howto_table[r_type]->name,
11121 mask + 1);
11122 bfd_set_error (bfd_error_bad_value);
11123 ret = FALSE;
11124 continue;
11125 }
11126 break;
11127 }
11128
11129 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11130 because such sections are not SEC_ALLOC and thus ld.so will
11131 not process them. */
11132 if (unresolved_reloc
11133 && !((input_section->flags & SEC_DEBUGGING) != 0
11134 && h->elf.def_dynamic))
11135 {
11136 (*_bfd_error_handler)
11137 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11138 input_bfd,
11139 input_section,
11140 (long) rel->r_offset,
11141 ppc64_elf_howto_table[(int) r_type]->name,
11142 h->elf.root.root.string);
11143 ret = FALSE;
11144 }
11145
11146 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11147 input_bfd,
11148 input_section,
11149 contents,
11150 rel->r_offset,
11151 relocation,
11152 addend);
11153
11154 if (r != bfd_reloc_ok)
11155 {
11156 if (sym_name == NULL)
11157 sym_name = "(null)";
11158 if (r == bfd_reloc_overflow)
11159 {
11160 if (warned)
11161 continue;
11162 if (h != NULL
11163 && h->elf.root.type == bfd_link_hash_undefweak
11164 && ppc64_elf_howto_table[r_type]->pc_relative)
11165 {
11166 /* Assume this is a call protected by other code that
11167 detects the symbol is undefined. If this is the case,
11168 we can safely ignore the overflow. If not, the
11169 program is hosed anyway, and a little warning isn't
11170 going to help. */
11171
11172 continue;
11173 }
11174
11175 if (!((*info->callbacks->reloc_overflow)
11176 (info, (h ? &h->elf.root : NULL), sym_name,
11177 ppc64_elf_howto_table[r_type]->name,
11178 orig_addend, input_bfd, input_section, rel->r_offset)))
11179 return FALSE;
11180 }
11181 else
11182 {
11183 (*_bfd_error_handler)
11184 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11185 input_bfd,
11186 input_section,
11187 (long) rel->r_offset,
11188 ppc64_elf_howto_table[r_type]->name,
11189 sym_name,
11190 (int) r);
11191 ret = FALSE;
11192 }
11193 }
11194 }
11195
11196 /* If we're emitting relocations, then shortly after this function
11197 returns, reloc offsets and addends for this section will be
11198 adjusted. Worse, reloc symbol indices will be for the output
11199 file rather than the input. Save a copy of the relocs for
11200 opd_entry_value. */
11201 if (is_opd && (info->emitrelocations || info->relocatable))
11202 {
11203 bfd_size_type amt;
11204 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11205 rel = bfd_alloc (input_bfd, amt);
11206 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11207 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11208 if (rel == NULL)
11209 return FALSE;
11210 memcpy (rel, relocs, amt);
11211 }
11212 return ret;
11213 }
11214
11215 /* Adjust the value of any local symbols in opd sections. */
11216
11217 static bfd_boolean
11218 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11219 const char *name ATTRIBUTE_UNUSED,
11220 Elf_Internal_Sym *elfsym,
11221 asection *input_sec,
11222 struct elf_link_hash_entry *h)
11223 {
11224 long *opd_adjust, adjust;
11225 bfd_vma value;
11226
11227 if (h != NULL)
11228 return TRUE;
11229
11230 opd_adjust = get_opd_info (input_sec);
11231 if (opd_adjust == NULL)
11232 return TRUE;
11233
11234 value = elfsym->st_value - input_sec->output_offset;
11235 if (!info->relocatable)
11236 value -= input_sec->output_section->vma;
11237
11238 adjust = opd_adjust[value / 8];
11239 if (adjust == -1)
11240 elfsym->st_value = 0;
11241 else
11242 elfsym->st_value += adjust;
11243 return TRUE;
11244 }
11245
11246 /* Finish up dynamic symbol handling. We set the contents of various
11247 dynamic sections here. */
11248
11249 static bfd_boolean
11250 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11251 struct bfd_link_info *info,
11252 struct elf_link_hash_entry *h,
11253 Elf_Internal_Sym *sym)
11254 {
11255 struct ppc_link_hash_table *htab;
11256 struct plt_entry *ent;
11257 Elf_Internal_Rela rela;
11258 bfd_byte *loc;
11259
11260 htab = ppc_hash_table (info);
11261
11262 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11263 if (ent->plt.offset != (bfd_vma) -1)
11264 {
11265 /* This symbol has an entry in the procedure linkage
11266 table. Set it up. */
11267
11268 if (htab->plt == NULL
11269 || htab->relplt == NULL
11270 || htab->glink == NULL)
11271 abort ();
11272
11273 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11274 fill in the PLT entry. */
11275 rela.r_offset = (htab->plt->output_section->vma
11276 + htab->plt->output_offset
11277 + ent->plt.offset);
11278 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11279 rela.r_addend = ent->addend;
11280
11281 loc = htab->relplt->contents;
11282 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11283 * sizeof (Elf64_External_Rela));
11284 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11285 }
11286
11287 if (h->needs_copy)
11288 {
11289 Elf_Internal_Rela rela;
11290 bfd_byte *loc;
11291
11292 /* This symbol needs a copy reloc. Set it up. */
11293
11294 if (h->dynindx == -1
11295 || (h->root.type != bfd_link_hash_defined
11296 && h->root.type != bfd_link_hash_defweak)
11297 || htab->relbss == NULL)
11298 abort ();
11299
11300 rela.r_offset = (h->root.u.def.value
11301 + h->root.u.def.section->output_section->vma
11302 + h->root.u.def.section->output_offset);
11303 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11304 rela.r_addend = 0;
11305 loc = htab->relbss->contents;
11306 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11307 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11308 }
11309
11310 /* Mark some specially defined symbols as absolute. */
11311 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11312 sym->st_shndx = SHN_ABS;
11313
11314 return TRUE;
11315 }
11316
11317 /* Used to decide how to sort relocs in an optimal manner for the
11318 dynamic linker, before writing them out. */
11319
11320 static enum elf_reloc_type_class
11321 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11322 {
11323 enum elf_ppc64_reloc_type r_type;
11324
11325 r_type = ELF64_R_TYPE (rela->r_info);
11326 switch (r_type)
11327 {
11328 case R_PPC64_RELATIVE:
11329 return reloc_class_relative;
11330 case R_PPC64_JMP_SLOT:
11331 return reloc_class_plt;
11332 case R_PPC64_COPY:
11333 return reloc_class_copy;
11334 default:
11335 return reloc_class_normal;
11336 }
11337 }
11338
11339 /* Finish up the dynamic sections. */
11340
11341 static bfd_boolean
11342 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11343 struct bfd_link_info *info)
11344 {
11345 struct ppc_link_hash_table *htab;
11346 bfd *dynobj;
11347 asection *sdyn;
11348
11349 htab = ppc_hash_table (info);
11350 dynobj = htab->elf.dynobj;
11351 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11352
11353 if (htab->elf.dynamic_sections_created)
11354 {
11355 Elf64_External_Dyn *dyncon, *dynconend;
11356
11357 if (sdyn == NULL || htab->got == NULL)
11358 abort ();
11359
11360 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11361 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11362 for (; dyncon < dynconend; dyncon++)
11363 {
11364 Elf_Internal_Dyn dyn;
11365 asection *s;
11366
11367 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11368
11369 switch (dyn.d_tag)
11370 {
11371 default:
11372 continue;
11373
11374 case DT_PPC64_GLINK:
11375 s = htab->glink;
11376 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11377 /* We stupidly defined DT_PPC64_GLINK to be the start
11378 of glink rather than the first entry point, which is
11379 what ld.so needs, and now have a bigger stub to
11380 support automatic multiple TOCs. */
11381 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11382 break;
11383
11384 case DT_PPC64_OPD:
11385 s = bfd_get_section_by_name (output_bfd, ".opd");
11386 if (s == NULL)
11387 continue;
11388 dyn.d_un.d_ptr = s->vma;
11389 break;
11390
11391 case DT_PPC64_OPDSZ:
11392 s = bfd_get_section_by_name (output_bfd, ".opd");
11393 if (s == NULL)
11394 continue;
11395 dyn.d_un.d_val = s->size;
11396 break;
11397
11398 case DT_PLTGOT:
11399 s = htab->plt;
11400 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11401 break;
11402
11403 case DT_JMPREL:
11404 s = htab->relplt;
11405 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11406 break;
11407
11408 case DT_PLTRELSZ:
11409 dyn.d_un.d_val = htab->relplt->size;
11410 break;
11411
11412 case DT_RELASZ:
11413 /* Don't count procedure linkage table relocs in the
11414 overall reloc count. */
11415 s = htab->relplt;
11416 if (s == NULL)
11417 continue;
11418 dyn.d_un.d_val -= s->size;
11419 break;
11420
11421 case DT_RELA:
11422 /* We may not be using the standard ELF linker script.
11423 If .rela.plt is the first .rela section, we adjust
11424 DT_RELA to not include it. */
11425 s = htab->relplt;
11426 if (s == NULL)
11427 continue;
11428 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11429 continue;
11430 dyn.d_un.d_ptr += s->size;
11431 break;
11432 }
11433
11434 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11435 }
11436 }
11437
11438 if (htab->got != NULL && htab->got->size != 0)
11439 {
11440 /* Fill in the first entry in the global offset table.
11441 We use it to hold the link-time TOCbase. */
11442 bfd_put_64 (output_bfd,
11443 elf_gp (output_bfd) + TOC_BASE_OFF,
11444 htab->got->contents);
11445
11446 /* Set .got entry size. */
11447 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11448 }
11449
11450 if (htab->plt != NULL && htab->plt->size != 0)
11451 {
11452 /* Set .plt entry size. */
11453 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11454 = PLT_ENTRY_SIZE;
11455 }
11456
11457 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11458 brlt ourselves if emitrelocations. */
11459 if (htab->brlt != NULL
11460 && htab->brlt->reloc_count != 0
11461 && !_bfd_elf_link_output_relocs (output_bfd,
11462 htab->brlt,
11463 &elf_section_data (htab->brlt)->rel_hdr,
11464 elf_section_data (htab->brlt)->relocs,
11465 NULL))
11466 return FALSE;
11467
11468 /* We need to handle writing out multiple GOT sections ourselves,
11469 since we didn't add them to DYNOBJ. We know dynobj is the first
11470 bfd. */
11471 while ((dynobj = dynobj->link_next) != NULL)
11472 {
11473 asection *s;
11474
11475 if (!is_ppc64_elf_target (dynobj->xvec))
11476 continue;
11477
11478 s = ppc64_elf_tdata (dynobj)->got;
11479 if (s != NULL
11480 && s->size != 0
11481 && s->output_section != bfd_abs_section_ptr
11482 && !bfd_set_section_contents (output_bfd, s->output_section,
11483 s->contents, s->output_offset,
11484 s->size))
11485 return FALSE;
11486 s = ppc64_elf_tdata (dynobj)->relgot;
11487 if (s != NULL
11488 && s->size != 0
11489 && s->output_section != bfd_abs_section_ptr
11490 && !bfd_set_section_contents (output_bfd, s->output_section,
11491 s->contents, s->output_offset,
11492 s->size))
11493 return FALSE;
11494 }
11495
11496 return TRUE;
11497 }
11498
11499 #include "elf64-target.h"
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