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* cache.c (cache_bread): Set bfd_error_file_truncated if EOF
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_check_directives
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115
116 /* The name of the dynamic interpreter. This is put in the .interp
117 section. */
118 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
119
120 /* The size in bytes of an entry in the procedure linkage table. */
121 #define PLT_ENTRY_SIZE 24
122
123 /* The initial size of the plt reserved for the dynamic linker. */
124 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
125
126 /* TOC base pointers offset from start of TOC. */
127 #define TOC_BASE_OFF 0x8000
128
129 /* Offset of tp and dtp pointers from start of TLS block. */
130 #define TP_OFFSET 0x7000
131 #define DTP_OFFSET 0x8000
132
133 /* .plt call stub instructions. The normal stub is like this, but
134 sometimes the .plt entry crosses a 64k boundary and we need to
135 insert an addi to adjust r12. */
136 #define PLT_CALL_STUB_SIZE (7*4)
137 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
138 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
139 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
140 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
141 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
142 /* ld %r11,xxx+16@l(%r12) */
143 #define BCTR 0x4e800420 /* bctr */
144
145
146 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
147 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
148 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
149 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
150
151 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
152 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
153
154 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
155
156 /* glink call stub instructions. We enter with the index in R0. */
157 #define GLINK_CALL_STUB_SIZE (16*4)
158 /* 0: */
159 /* .quad plt0-1f */
160 /* __glink: */
161 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
162 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
163 /* 1: */
164 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
165 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
166 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
167 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
168 /* ld %11,0(%12) */
169 /* ld %2,8(%12) */
170 /* mtctr %11 */
171 /* ld %11,16(%12) */
172 /* bctr */
173
174 /* Pad with this. */
175 #define NOP 0x60000000
176
177 /* Some other nops. */
178 #define CROR_151515 0x4def7b82
179 #define CROR_313131 0x4ffffb82
180
181 /* .glink entries for the first 32k functions are two instructions. */
182 #define LI_R0_0 0x38000000 /* li %r0,0 */
183 #define B_DOT 0x48000000 /* b . */
184
185 /* After that, we need two instructions to load the index, followed by
186 a branch. */
187 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
188 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
189
190 /* Instructions used by the save and restore reg functions. */
191 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
192 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
193 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
194 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
195 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
196 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
197 #define LI_R12_0 0x39800000 /* li %r12,0 */
198 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
199 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
200 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
201 #define BLR 0x4e800020 /* blr */
202
203 /* Since .opd is an array of descriptors and each entry will end up
204 with identical R_PPC64_RELATIVE relocs, there is really no need to
205 propagate .opd relocs; The dynamic linker should be taught to
206 relocate .opd without reloc entries. */
207 #ifndef NO_OPD_RELOCS
208 #define NO_OPD_RELOCS 0
209 #endif
210 \f
211 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
212
213 /* Relocation HOWTO's. */
214 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
215
216 static reloc_howto_type ppc64_elf_howto_raw[] = {
217 /* This reloc does nothing. */
218 HOWTO (R_PPC64_NONE, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 32, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_dont, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC64_NONE", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 32 bit relocation. */
233 HOWTO (R_PPC64_ADDR32, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 32, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC64_ADDR32", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffffffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* An absolute 26 bit branch; the lower two bits must be zero.
248 FIXME: we don't check that, we just clear them. */
249 HOWTO (R_PPC64_ADDR24, /* type */
250 0, /* rightshift */
251 2, /* size (0 = byte, 1 = short, 2 = long) */
252 26, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_bitfield, /* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC64_ADDR24", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0x03fffffc, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* A standard 16 bit relocation. */
264 HOWTO (R_PPC64_ADDR16, /* type */
265 0, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_bitfield, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC64_ADDR16", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* A 16 bit relocation without overflow. */
279 HOWTO (R_PPC64_ADDR16_LO, /* type */
280 0, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont,/* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_PPC64_ADDR16_LO", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* Bits 16-31 of an address. */
294 HOWTO (R_PPC64_ADDR16_HI, /* type */
295 16, /* rightshift */
296 1, /* size (0 = byte, 1 = short, 2 = long) */
297 16, /* bitsize */
298 FALSE, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_dont, /* complain_on_overflow */
301 bfd_elf_generic_reloc, /* special_function */
302 "R_PPC64_ADDR16_HI", /* name */
303 FALSE, /* partial_inplace */
304 0, /* src_mask */
305 0xffff, /* dst_mask */
306 FALSE), /* pcrel_offset */
307
308 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
309 bits, treated as a signed number, is negative. */
310 HOWTO (R_PPC64_ADDR16_HA, /* type */
311 16, /* rightshift */
312 1, /* size (0 = byte, 1 = short, 2 = long) */
313 16, /* bitsize */
314 FALSE, /* pc_relative */
315 0, /* bitpos */
316 complain_overflow_dont, /* complain_on_overflow */
317 ppc64_elf_ha_reloc, /* special_function */
318 "R_PPC64_ADDR16_HA", /* name */
319 FALSE, /* partial_inplace */
320 0, /* src_mask */
321 0xffff, /* dst_mask */
322 FALSE), /* pcrel_offset */
323
324 /* An absolute 16 bit branch; the lower two bits must be zero.
325 FIXME: we don't check that, we just clear them. */
326 HOWTO (R_PPC64_ADDR14, /* type */
327 0, /* rightshift */
328 2, /* size (0 = byte, 1 = short, 2 = long) */
329 16, /* bitsize */
330 FALSE, /* pc_relative */
331 0, /* bitpos */
332 complain_overflow_bitfield, /* complain_on_overflow */
333 ppc64_elf_branch_reloc, /* special_function */
334 "R_PPC64_ADDR14", /* name */
335 FALSE, /* partial_inplace */
336 0, /* src_mask */
337 0x0000fffc, /* dst_mask */
338 FALSE), /* pcrel_offset */
339
340 /* An absolute 16 bit branch, for which bit 10 should be set to
341 indicate that the branch is expected to be taken. The lower two
342 bits must be zero. */
343 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 16, /* bitsize */
347 FALSE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_bitfield, /* complain_on_overflow */
350 ppc64_elf_brtaken_reloc, /* special_function */
351 "R_PPC64_ADDR14_BRTAKEN",/* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0x0000fffc, /* dst_mask */
355 FALSE), /* pcrel_offset */
356
357 /* An absolute 16 bit branch, for which bit 10 should be set to
358 indicate that the branch is not expected to be taken. The lower
359 two bits must be zero. */
360 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 FALSE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_bitfield, /* complain_on_overflow */
367 ppc64_elf_brtaken_reloc, /* special_function */
368 "R_PPC64_ADDR14_BRNTAKEN",/* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x0000fffc, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* A relative 26 bit branch; the lower two bits must be zero. */
375 HOWTO (R_PPC64_REL24, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 26, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_signed, /* complain_on_overflow */
382 ppc64_elf_branch_reloc, /* special_function */
383 "R_PPC64_REL24", /* name */
384 FALSE, /* partial_inplace */
385 0, /* src_mask */
386 0x03fffffc, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 /* A relative 16 bit branch; the lower two bits must be zero. */
390 HOWTO (R_PPC64_REL14, /* type */
391 0, /* rightshift */
392 2, /* size (0 = byte, 1 = short, 2 = long) */
393 16, /* bitsize */
394 TRUE, /* pc_relative */
395 0, /* bitpos */
396 complain_overflow_signed, /* complain_on_overflow */
397 ppc64_elf_branch_reloc, /* special_function */
398 "R_PPC64_REL14", /* name */
399 FALSE, /* partial_inplace */
400 0, /* src_mask */
401 0x0000fffc, /* dst_mask */
402 TRUE), /* pcrel_offset */
403
404 /* A relative 16 bit branch. Bit 10 should be set to indicate that
405 the branch is expected to be taken. The lower two bits must be
406 zero. */
407 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
408 0, /* rightshift */
409 2, /* size (0 = byte, 1 = short, 2 = long) */
410 16, /* bitsize */
411 TRUE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_signed, /* complain_on_overflow */
414 ppc64_elf_brtaken_reloc, /* special_function */
415 "R_PPC64_REL14_BRTAKEN", /* name */
416 FALSE, /* partial_inplace */
417 0, /* src_mask */
418 0x0000fffc, /* dst_mask */
419 TRUE), /* pcrel_offset */
420
421 /* A relative 16 bit branch. Bit 10 should be set to indicate that
422 the branch is not expected to be taken. The lower two bits must
423 be zero. */
424 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
425 0, /* rightshift */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
427 16, /* bitsize */
428 TRUE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_signed, /* complain_on_overflow */
431 ppc64_elf_brtaken_reloc, /* special_function */
432 "R_PPC64_REL14_BRNTAKEN",/* name */
433 FALSE, /* partial_inplace */
434 0, /* src_mask */
435 0x0000fffc, /* dst_mask */
436 TRUE), /* pcrel_offset */
437
438 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
439 symbol. */
440 HOWTO (R_PPC64_GOT16, /* type */
441 0, /* rightshift */
442 1, /* size (0 = byte, 1 = short, 2 = long) */
443 16, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_signed, /* complain_on_overflow */
447 ppc64_elf_unhandled_reloc, /* special_function */
448 "R_PPC64_GOT16", /* name */
449 FALSE, /* partial_inplace */
450 0, /* src_mask */
451 0xffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
455 the symbol. */
456 HOWTO (R_PPC64_GOT16_LO, /* type */
457 0, /* rightshift */
458 1, /* size (0 = byte, 1 = short, 2 = long) */
459 16, /* bitsize */
460 FALSE, /* pc_relative */
461 0, /* bitpos */
462 complain_overflow_dont, /* complain_on_overflow */
463 ppc64_elf_unhandled_reloc, /* special_function */
464 "R_PPC64_GOT16_LO", /* name */
465 FALSE, /* partial_inplace */
466 0, /* src_mask */
467 0xffff, /* dst_mask */
468 FALSE), /* pcrel_offset */
469
470 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
471 the symbol. */
472 HOWTO (R_PPC64_GOT16_HI, /* type */
473 16, /* rightshift */
474 1, /* size (0 = byte, 1 = short, 2 = long) */
475 16, /* bitsize */
476 FALSE, /* pc_relative */
477 0, /* bitpos */
478 complain_overflow_dont,/* complain_on_overflow */
479 ppc64_elf_unhandled_reloc, /* special_function */
480 "R_PPC64_GOT16_HI", /* name */
481 FALSE, /* partial_inplace */
482 0, /* src_mask */
483 0xffff, /* dst_mask */
484 FALSE), /* pcrel_offset */
485
486 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
487 the symbol. */
488 HOWTO (R_PPC64_GOT16_HA, /* type */
489 16, /* rightshift */
490 1, /* size (0 = byte, 1 = short, 2 = long) */
491 16, /* bitsize */
492 FALSE, /* pc_relative */
493 0, /* bitpos */
494 complain_overflow_dont,/* complain_on_overflow */
495 ppc64_elf_unhandled_reloc, /* special_function */
496 "R_PPC64_GOT16_HA", /* name */
497 FALSE, /* partial_inplace */
498 0, /* src_mask */
499 0xffff, /* dst_mask */
500 FALSE), /* pcrel_offset */
501
502 /* This is used only by the dynamic linker. The symbol should exist
503 both in the object being run and in some shared library. The
504 dynamic linker copies the data addressed by the symbol from the
505 shared library into the object, because the object being
506 run has to have the data at some particular address. */
507 HOWTO (R_PPC64_COPY, /* type */
508 0, /* rightshift */
509 0, /* this one is variable size */
510 0, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_COPY", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR64, but used when setting global offset table
522 entries. */
523 HOWTO (R_PPC64_GLOB_DAT, /* type */
524 0, /* rightshift */
525 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
526 64, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GLOB_DAT", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 ONES (64), /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Created by the link editor. Marks a procedure linkage table
538 entry for a symbol. */
539 HOWTO (R_PPC64_JMP_SLOT, /* type */
540 0, /* rightshift */
541 0, /* size (0 = byte, 1 = short, 2 = long) */
542 0, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_JMP_SLOT", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Used only by the dynamic linker. When the object is run, this
554 doubleword64 is set to the load address of the object, plus the
555 addend. */
556 HOWTO (R_PPC64_RELATIVE, /* type */
557 0, /* rightshift */
558 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
559 64, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_dont, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC64_RELATIVE", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 ONES (64), /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* Like R_PPC64_ADDR32, but may be unaligned. */
571 HOWTO (R_PPC64_UADDR32, /* type */
572 0, /* rightshift */
573 2, /* size (0 = byte, 1 = short, 2 = long) */
574 32, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC64_UADDR32", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffffffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* Like R_PPC64_ADDR16, but may be unaligned. */
586 HOWTO (R_PPC64_UADDR16, /* type */
587 0, /* rightshift */
588 1, /* size (0 = byte, 1 = short, 2 = long) */
589 16, /* bitsize */
590 FALSE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC64_UADDR16", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffff, /* dst_mask */
598 FALSE), /* pcrel_offset */
599
600 /* 32-bit PC relative. */
601 HOWTO (R_PPC64_REL32, /* type */
602 0, /* rightshift */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
604 32, /* bitsize */
605 TRUE, /* pc_relative */
606 0, /* bitpos */
607 /* FIXME: Verify. Was complain_overflow_bitfield. */
608 complain_overflow_signed, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC64_REL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* 32-bit relocation to the symbol's procedure linkage table. */
617 HOWTO (R_PPC64_PLT32, /* type */
618 0, /* rightshift */
619 2, /* size (0 = byte, 1 = short, 2 = long) */
620 32, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_bitfield, /* complain_on_overflow */
624 ppc64_elf_unhandled_reloc, /* special_function */
625 "R_PPC64_PLT32", /* name */
626 FALSE, /* partial_inplace */
627 0, /* src_mask */
628 0xffffffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
630
631 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
632 FIXME: R_PPC64_PLTREL32 not supported. */
633 HOWTO (R_PPC64_PLTREL32, /* type */
634 0, /* rightshift */
635 2, /* size (0 = byte, 1 = short, 2 = long) */
636 32, /* bitsize */
637 TRUE, /* pc_relative */
638 0, /* bitpos */
639 complain_overflow_signed, /* complain_on_overflow */
640 bfd_elf_generic_reloc, /* special_function */
641 "R_PPC64_PLTREL32", /* name */
642 FALSE, /* partial_inplace */
643 0, /* src_mask */
644 0xffffffff, /* dst_mask */
645 TRUE), /* pcrel_offset */
646
647 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
648 the symbol. */
649 HOWTO (R_PPC64_PLT16_LO, /* type */
650 0, /* rightshift */
651 1, /* size (0 = byte, 1 = short, 2 = long) */
652 16, /* bitsize */
653 FALSE, /* pc_relative */
654 0, /* bitpos */
655 complain_overflow_dont, /* complain_on_overflow */
656 ppc64_elf_unhandled_reloc, /* special_function */
657 "R_PPC64_PLT16_LO", /* name */
658 FALSE, /* partial_inplace */
659 0, /* src_mask */
660 0xffff, /* dst_mask */
661 FALSE), /* pcrel_offset */
662
663 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
664 the symbol. */
665 HOWTO (R_PPC64_PLT16_HI, /* type */
666 16, /* rightshift */
667 1, /* size (0 = byte, 1 = short, 2 = long) */
668 16, /* bitsize */
669 FALSE, /* pc_relative */
670 0, /* bitpos */
671 complain_overflow_dont, /* complain_on_overflow */
672 ppc64_elf_unhandled_reloc, /* special_function */
673 "R_PPC64_PLT16_HI", /* name */
674 FALSE, /* partial_inplace */
675 0, /* src_mask */
676 0xffff, /* dst_mask */
677 FALSE), /* pcrel_offset */
678
679 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
680 the symbol. */
681 HOWTO (R_PPC64_PLT16_HA, /* type */
682 16, /* rightshift */
683 1, /* size (0 = byte, 1 = short, 2 = long) */
684 16, /* bitsize */
685 FALSE, /* pc_relative */
686 0, /* bitpos */
687 complain_overflow_dont, /* complain_on_overflow */
688 ppc64_elf_unhandled_reloc, /* special_function */
689 "R_PPC64_PLT16_HA", /* name */
690 FALSE, /* partial_inplace */
691 0, /* src_mask */
692 0xffff, /* dst_mask */
693 FALSE), /* pcrel_offset */
694
695 /* 16-bit section relative relocation. */
696 HOWTO (R_PPC64_SECTOFF, /* type */
697 0, /* rightshift */
698 1, /* size (0 = byte, 1 = short, 2 = long) */
699 16, /* bitsize */
700 FALSE, /* pc_relative */
701 0, /* bitpos */
702 complain_overflow_bitfield, /* complain_on_overflow */
703 ppc64_elf_sectoff_reloc, /* special_function */
704 "R_PPC64_SECTOFF", /* name */
705 FALSE, /* partial_inplace */
706 0, /* src_mask */
707 0xffff, /* dst_mask */
708 FALSE), /* pcrel_offset */
709
710 /* Like R_PPC64_SECTOFF, but no overflow warning. */
711 HOWTO (R_PPC64_SECTOFF_LO, /* type */
712 0, /* rightshift */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
714 16, /* bitsize */
715 FALSE, /* pc_relative */
716 0, /* bitpos */
717 complain_overflow_dont, /* complain_on_overflow */
718 ppc64_elf_sectoff_reloc, /* special_function */
719 "R_PPC64_SECTOFF_LO", /* name */
720 FALSE, /* partial_inplace */
721 0, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE), /* pcrel_offset */
724
725 /* 16-bit upper half section relative relocation. */
726 HOWTO (R_PPC64_SECTOFF_HI, /* type */
727 16, /* rightshift */
728 1, /* size (0 = byte, 1 = short, 2 = long) */
729 16, /* bitsize */
730 FALSE, /* pc_relative */
731 0, /* bitpos */
732 complain_overflow_dont, /* complain_on_overflow */
733 ppc64_elf_sectoff_reloc, /* special_function */
734 "R_PPC64_SECTOFF_HI", /* name */
735 FALSE, /* partial_inplace */
736 0, /* src_mask */
737 0xffff, /* dst_mask */
738 FALSE), /* pcrel_offset */
739
740 /* 16-bit upper half adjusted section relative relocation. */
741 HOWTO (R_PPC64_SECTOFF_HA, /* type */
742 16, /* rightshift */
743 1, /* size (0 = byte, 1 = short, 2 = long) */
744 16, /* bitsize */
745 FALSE, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_dont, /* complain_on_overflow */
748 ppc64_elf_sectoff_ha_reloc, /* special_function */
749 "R_PPC64_SECTOFF_HA", /* name */
750 FALSE, /* partial_inplace */
751 0, /* src_mask */
752 0xffff, /* dst_mask */
753 FALSE), /* pcrel_offset */
754
755 /* Like R_PPC64_REL24 without touching the two least significant bits. */
756 HOWTO (R_PPC64_REL30, /* type */
757 2, /* rightshift */
758 2, /* size (0 = byte, 1 = short, 2 = long) */
759 30, /* bitsize */
760 TRUE, /* pc_relative */
761 0, /* bitpos */
762 complain_overflow_dont, /* complain_on_overflow */
763 bfd_elf_generic_reloc, /* special_function */
764 "R_PPC64_REL30", /* name */
765 FALSE, /* partial_inplace */
766 0, /* src_mask */
767 0xfffffffc, /* dst_mask */
768 TRUE), /* pcrel_offset */
769
770 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
771
772 /* A standard 64-bit relocation. */
773 HOWTO (R_PPC64_ADDR64, /* type */
774 0, /* rightshift */
775 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
776 64, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_PPC64_ADDR64", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 ONES (64), /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 /* The bits 32-47 of an address. */
788 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
789 32, /* rightshift */
790 1, /* size (0 = byte, 1 = short, 2 = long) */
791 16, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC64_ADDR16_HIGHER", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0xffff, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 /* The bits 32-47 of an address, plus 1 if the contents of the low
803 16 bits, treated as a signed number, is negative. */
804 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
805 32, /* rightshift */
806 1, /* size (0 = byte, 1 = short, 2 = long) */
807 16, /* bitsize */
808 FALSE, /* pc_relative */
809 0, /* bitpos */
810 complain_overflow_dont, /* complain_on_overflow */
811 ppc64_elf_ha_reloc, /* special_function */
812 "R_PPC64_ADDR16_HIGHERA", /* name */
813 FALSE, /* partial_inplace */
814 0, /* src_mask */
815 0xffff, /* dst_mask */
816 FALSE), /* pcrel_offset */
817
818 /* The bits 48-63 of an address. */
819 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
820 48, /* rightshift */
821 1, /* size (0 = byte, 1 = short, 2 = long) */
822 16, /* bitsize */
823 FALSE, /* pc_relative */
824 0, /* bitpos */
825 complain_overflow_dont, /* complain_on_overflow */
826 bfd_elf_generic_reloc, /* special_function */
827 "R_PPC64_ADDR16_HIGHEST", /* name */
828 FALSE, /* partial_inplace */
829 0, /* src_mask */
830 0xffff, /* dst_mask */
831 FALSE), /* pcrel_offset */
832
833 /* The bits 48-63 of an address, plus 1 if the contents of the low
834 16 bits, treated as a signed number, is negative. */
835 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
836 48, /* rightshift */
837 1, /* size (0 = byte, 1 = short, 2 = long) */
838 16, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc64_elf_ha_reloc, /* special_function */
843 "R_PPC64_ADDR16_HIGHESTA", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* Like ADDR64, but may be unaligned. */
850 HOWTO (R_PPC64_UADDR64, /* type */
851 0, /* rightshift */
852 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
853 64, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_dont, /* complain_on_overflow */
857 bfd_elf_generic_reloc, /* special_function */
858 "R_PPC64_UADDR64", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 ONES (64), /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* 64-bit relative relocation. */
865 HOWTO (R_PPC64_REL64, /* type */
866 0, /* rightshift */
867 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
868 64, /* bitsize */
869 TRUE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 bfd_elf_generic_reloc, /* special_function */
873 "R_PPC64_REL64", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 ONES (64), /* dst_mask */
877 TRUE), /* pcrel_offset */
878
879 /* 64-bit relocation to the symbol's procedure linkage table. */
880 HOWTO (R_PPC64_PLT64, /* type */
881 0, /* rightshift */
882 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
883 64, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc64_elf_unhandled_reloc, /* special_function */
888 "R_PPC64_PLT64", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 ONES (64), /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* 64-bit PC relative relocation to the symbol's procedure linkage
895 table. */
896 /* FIXME: R_PPC64_PLTREL64 not supported. */
897 HOWTO (R_PPC64_PLTREL64, /* type */
898 0, /* rightshift */
899 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
900 64, /* bitsize */
901 TRUE, /* pc_relative */
902 0, /* bitpos */
903 complain_overflow_dont, /* complain_on_overflow */
904 ppc64_elf_unhandled_reloc, /* special_function */
905 "R_PPC64_PLTREL64", /* name */
906 FALSE, /* partial_inplace */
907 0, /* src_mask */
908 ONES (64), /* dst_mask */
909 TRUE), /* pcrel_offset */
910
911 /* 16 bit TOC-relative relocation. */
912
913 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
914 HOWTO (R_PPC64_TOC16, /* type */
915 0, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_signed, /* complain_on_overflow */
921 ppc64_elf_toc_reloc, /* special_function */
922 "R_PPC64_TOC16", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* 16 bit TOC-relative relocation without overflow. */
929
930 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
931 HOWTO (R_PPC64_TOC16_LO, /* type */
932 0, /* rightshift */
933 1, /* size (0 = byte, 1 = short, 2 = long) */
934 16, /* bitsize */
935 FALSE, /* pc_relative */
936 0, /* bitpos */
937 complain_overflow_dont, /* complain_on_overflow */
938 ppc64_elf_toc_reloc, /* special_function */
939 "R_PPC64_TOC16_LO", /* name */
940 FALSE, /* partial_inplace */
941 0, /* src_mask */
942 0xffff, /* dst_mask */
943 FALSE), /* pcrel_offset */
944
945 /* 16 bit TOC-relative relocation, high 16 bits. */
946
947 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
948 HOWTO (R_PPC64_TOC16_HI, /* type */
949 16, /* rightshift */
950 1, /* size (0 = byte, 1 = short, 2 = long) */
951 16, /* bitsize */
952 FALSE, /* pc_relative */
953 0, /* bitpos */
954 complain_overflow_dont, /* complain_on_overflow */
955 ppc64_elf_toc_reloc, /* special_function */
956 "R_PPC64_TOC16_HI", /* name */
957 FALSE, /* partial_inplace */
958 0, /* src_mask */
959 0xffff, /* dst_mask */
960 FALSE), /* pcrel_offset */
961
962 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
963 contents of the low 16 bits, treated as a signed number, is
964 negative. */
965
966 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
967 HOWTO (R_PPC64_TOC16_HA, /* type */
968 16, /* rightshift */
969 1, /* size (0 = byte, 1 = short, 2 = long) */
970 16, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont, /* complain_on_overflow */
974 ppc64_elf_toc_ha_reloc, /* special_function */
975 "R_PPC64_TOC16_HA", /* name */
976 FALSE, /* partial_inplace */
977 0, /* src_mask */
978 0xffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 /* 64-bit relocation; insert value of TOC base (.TOC.). */
982
983 /* R_PPC64_TOC 51 doubleword64 .TOC. */
984 HOWTO (R_PPC64_TOC, /* type */
985 0, /* rightshift */
986 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
987 64, /* bitsize */
988 FALSE, /* pc_relative */
989 0, /* bitpos */
990 complain_overflow_bitfield, /* complain_on_overflow */
991 ppc64_elf_toc64_reloc, /* special_function */
992 "R_PPC64_TOC", /* name */
993 FALSE, /* partial_inplace */
994 0, /* src_mask */
995 ONES (64), /* dst_mask */
996 FALSE), /* pcrel_offset */
997
998 /* Like R_PPC64_GOT16, but also informs the link editor that the
999 value to relocate may (!) refer to a PLT entry which the link
1000 editor (a) may replace with the symbol value. If the link editor
1001 is unable to fully resolve the symbol, it may (b) create a PLT
1002 entry and store the address to the new PLT entry in the GOT.
1003 This permits lazy resolution of function symbols at run time.
1004 The link editor may also skip all of this and just (c) emit a
1005 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1006 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1007 HOWTO (R_PPC64_PLTGOT16, /* type */
1008 0, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_signed, /* complain_on_overflow */
1014 ppc64_elf_unhandled_reloc, /* special_function */
1015 "R_PPC64_PLTGOT16", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* Like R_PPC64_PLTGOT16, but without overflow. */
1022 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1023 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1024 0, /* rightshift */
1025 1, /* size (0 = byte, 1 = short, 2 = long) */
1026 16, /* bitsize */
1027 FALSE, /* pc_relative */
1028 0, /* bitpos */
1029 complain_overflow_dont, /* complain_on_overflow */
1030 ppc64_elf_unhandled_reloc, /* special_function */
1031 "R_PPC64_PLTGOT16_LO", /* name */
1032 FALSE, /* partial_inplace */
1033 0, /* src_mask */
1034 0xffff, /* dst_mask */
1035 FALSE), /* pcrel_offset */
1036
1037 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1038 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1039 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1040 16, /* rightshift */
1041 1, /* size (0 = byte, 1 = short, 2 = long) */
1042 16, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_unhandled_reloc, /* special_function */
1047 "R_PPC64_PLTGOT16_HI", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 0xffff, /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1054 1 if the contents of the low 16 bits, treated as a signed number,
1055 is negative. */
1056 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1058 16, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_dont,/* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16_HA", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1072 HOWTO (R_PPC64_ADDR16_DS, /* type */
1073 0, /* rightshift */
1074 1, /* size (0 = byte, 1 = short, 2 = long) */
1075 16, /* bitsize */
1076 FALSE, /* pc_relative */
1077 0, /* bitpos */
1078 complain_overflow_bitfield, /* complain_on_overflow */
1079 bfd_elf_generic_reloc, /* special_function */
1080 "R_PPC64_ADDR16_DS", /* name */
1081 FALSE, /* partial_inplace */
1082 0, /* src_mask */
1083 0xfffc, /* dst_mask */
1084 FALSE), /* pcrel_offset */
1085
1086 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1087 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1088 0, /* rightshift */
1089 1, /* size (0 = byte, 1 = short, 2 = long) */
1090 16, /* bitsize */
1091 FALSE, /* pc_relative */
1092 0, /* bitpos */
1093 complain_overflow_dont,/* complain_on_overflow */
1094 bfd_elf_generic_reloc, /* special_function */
1095 "R_PPC64_ADDR16_LO_DS",/* name */
1096 FALSE, /* partial_inplace */
1097 0, /* src_mask */
1098 0xfffc, /* dst_mask */
1099 FALSE), /* pcrel_offset */
1100
1101 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1102 HOWTO (R_PPC64_GOT16_DS, /* type */
1103 0, /* rightshift */
1104 1, /* size (0 = byte, 1 = short, 2 = long) */
1105 16, /* bitsize */
1106 FALSE, /* pc_relative */
1107 0, /* bitpos */
1108 complain_overflow_signed, /* complain_on_overflow */
1109 ppc64_elf_unhandled_reloc, /* special_function */
1110 "R_PPC64_GOT16_DS", /* name */
1111 FALSE, /* partial_inplace */
1112 0, /* src_mask */
1113 0xfffc, /* dst_mask */
1114 FALSE), /* pcrel_offset */
1115
1116 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1117 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1118 0, /* rightshift */
1119 1, /* size (0 = byte, 1 = short, 2 = long) */
1120 16, /* bitsize */
1121 FALSE, /* pc_relative */
1122 0, /* bitpos */
1123 complain_overflow_dont, /* complain_on_overflow */
1124 ppc64_elf_unhandled_reloc, /* special_function */
1125 "R_PPC64_GOT16_LO_DS", /* name */
1126 FALSE, /* partial_inplace */
1127 0, /* src_mask */
1128 0xfffc, /* dst_mask */
1129 FALSE), /* pcrel_offset */
1130
1131 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1132 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1133 0, /* rightshift */
1134 1, /* size (0 = byte, 1 = short, 2 = long) */
1135 16, /* bitsize */
1136 FALSE, /* pc_relative */
1137 0, /* bitpos */
1138 complain_overflow_dont, /* complain_on_overflow */
1139 ppc64_elf_unhandled_reloc, /* special_function */
1140 "R_PPC64_PLT16_LO_DS", /* name */
1141 FALSE, /* partial_inplace */
1142 0, /* src_mask */
1143 0xfffc, /* dst_mask */
1144 FALSE), /* pcrel_offset */
1145
1146 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1147 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1148 0, /* rightshift */
1149 1, /* size (0 = byte, 1 = short, 2 = long) */
1150 16, /* bitsize */
1151 FALSE, /* pc_relative */
1152 0, /* bitpos */
1153 complain_overflow_bitfield, /* complain_on_overflow */
1154 ppc64_elf_sectoff_reloc, /* special_function */
1155 "R_PPC64_SECTOFF_DS", /* name */
1156 FALSE, /* partial_inplace */
1157 0, /* src_mask */
1158 0xfffc, /* dst_mask */
1159 FALSE), /* pcrel_offset */
1160
1161 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1162 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1163 0, /* rightshift */
1164 1, /* size (0 = byte, 1 = short, 2 = long) */
1165 16, /* bitsize */
1166 FALSE, /* pc_relative */
1167 0, /* bitpos */
1168 complain_overflow_dont, /* complain_on_overflow */
1169 ppc64_elf_sectoff_reloc, /* special_function */
1170 "R_PPC64_SECTOFF_LO_DS",/* name */
1171 FALSE, /* partial_inplace */
1172 0, /* src_mask */
1173 0xfffc, /* dst_mask */
1174 FALSE), /* pcrel_offset */
1175
1176 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1177 HOWTO (R_PPC64_TOC16_DS, /* type */
1178 0, /* rightshift */
1179 1, /* size (0 = byte, 1 = short, 2 = long) */
1180 16, /* bitsize */
1181 FALSE, /* pc_relative */
1182 0, /* bitpos */
1183 complain_overflow_signed, /* complain_on_overflow */
1184 ppc64_elf_toc_reloc, /* special_function */
1185 "R_PPC64_TOC16_DS", /* name */
1186 FALSE, /* partial_inplace */
1187 0, /* src_mask */
1188 0xfffc, /* dst_mask */
1189 FALSE), /* pcrel_offset */
1190
1191 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1192 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1193 0, /* rightshift */
1194 1, /* size (0 = byte, 1 = short, 2 = long) */
1195 16, /* bitsize */
1196 FALSE, /* pc_relative */
1197 0, /* bitpos */
1198 complain_overflow_dont, /* complain_on_overflow */
1199 ppc64_elf_toc_reloc, /* special_function */
1200 "R_PPC64_TOC16_LO_DS", /* name */
1201 FALSE, /* partial_inplace */
1202 0, /* src_mask */
1203 0xfffc, /* dst_mask */
1204 FALSE), /* pcrel_offset */
1205
1206 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1207 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1208 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1209 0, /* rightshift */
1210 1, /* size (0 = byte, 1 = short, 2 = long) */
1211 16, /* bitsize */
1212 FALSE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_signed, /* complain_on_overflow */
1215 ppc64_elf_unhandled_reloc, /* special_function */
1216 "R_PPC64_PLTGOT16_DS", /* name */
1217 FALSE, /* partial_inplace */
1218 0, /* src_mask */
1219 0xfffc, /* dst_mask */
1220 FALSE), /* pcrel_offset */
1221
1222 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1223 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1224 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1225 0, /* rightshift */
1226 1, /* size (0 = byte, 1 = short, 2 = long) */
1227 16, /* bitsize */
1228 FALSE, /* pc_relative */
1229 0, /* bitpos */
1230 complain_overflow_dont, /* complain_on_overflow */
1231 ppc64_elf_unhandled_reloc, /* special_function */
1232 "R_PPC64_PLTGOT16_LO_DS",/* name */
1233 FALSE, /* partial_inplace */
1234 0, /* src_mask */
1235 0xfffc, /* dst_mask */
1236 FALSE), /* pcrel_offset */
1237
1238 /* Marker reloc for TLS. */
1239 HOWTO (R_PPC64_TLS,
1240 0, /* rightshift */
1241 2, /* size (0 = byte, 1 = short, 2 = long) */
1242 32, /* bitsize */
1243 FALSE, /* pc_relative */
1244 0, /* bitpos */
1245 complain_overflow_dont, /* complain_on_overflow */
1246 bfd_elf_generic_reloc, /* special_function */
1247 "R_PPC64_TLS", /* name */
1248 FALSE, /* partial_inplace */
1249 0, /* src_mask */
1250 0, /* dst_mask */
1251 FALSE), /* pcrel_offset */
1252
1253 /* Computes the load module index of the load module that contains the
1254 definition of its TLS sym. */
1255 HOWTO (R_PPC64_DTPMOD64,
1256 0, /* rightshift */
1257 4, /* size (0 = byte, 1 = short, 2 = long) */
1258 64, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_dont, /* complain_on_overflow */
1262 ppc64_elf_unhandled_reloc, /* special_function */
1263 "R_PPC64_DTPMOD64", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 ONES (64), /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 /* Computes a dtv-relative displacement, the difference between the value
1270 of sym+add and the base address of the thread-local storage block that
1271 contains the definition of sym, minus 0x8000. */
1272 HOWTO (R_PPC64_DTPREL64,
1273 0, /* rightshift */
1274 4, /* size (0 = byte, 1 = short, 2 = long) */
1275 64, /* bitsize */
1276 FALSE, /* pc_relative */
1277 0, /* bitpos */
1278 complain_overflow_dont, /* complain_on_overflow */
1279 ppc64_elf_unhandled_reloc, /* special_function */
1280 "R_PPC64_DTPREL64", /* name */
1281 FALSE, /* partial_inplace */
1282 0, /* src_mask */
1283 ONES (64), /* dst_mask */
1284 FALSE), /* pcrel_offset */
1285
1286 /* A 16 bit dtprel reloc. */
1287 HOWTO (R_PPC64_DTPREL16,
1288 0, /* rightshift */
1289 1, /* size (0 = byte, 1 = short, 2 = long) */
1290 16, /* bitsize */
1291 FALSE, /* pc_relative */
1292 0, /* bitpos */
1293 complain_overflow_signed, /* complain_on_overflow */
1294 ppc64_elf_unhandled_reloc, /* special_function */
1295 "R_PPC64_DTPREL16", /* name */
1296 FALSE, /* partial_inplace */
1297 0, /* src_mask */
1298 0xffff, /* dst_mask */
1299 FALSE), /* pcrel_offset */
1300
1301 /* Like DTPREL16, but no overflow. */
1302 HOWTO (R_PPC64_DTPREL16_LO,
1303 0, /* rightshift */
1304 1, /* size (0 = byte, 1 = short, 2 = long) */
1305 16, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_dont, /* complain_on_overflow */
1309 ppc64_elf_unhandled_reloc, /* special_function */
1310 "R_PPC64_DTPREL16_LO", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 0xffff, /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1317 HOWTO (R_PPC64_DTPREL16_HI,
1318 16, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 ppc64_elf_unhandled_reloc, /* special_function */
1325 "R_PPC64_DTPREL16_HI", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1332 HOWTO (R_PPC64_DTPREL16_HA,
1333 16, /* rightshift */
1334 1, /* size (0 = byte, 1 = short, 2 = long) */
1335 16, /* bitsize */
1336 FALSE, /* pc_relative */
1337 0, /* bitpos */
1338 complain_overflow_dont, /* complain_on_overflow */
1339 ppc64_elf_unhandled_reloc, /* special_function */
1340 "R_PPC64_DTPREL16_HA", /* name */
1341 FALSE, /* partial_inplace */
1342 0, /* src_mask */
1343 0xffff, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1345
1346 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1347 HOWTO (R_PPC64_DTPREL16_HIGHER,
1348 32, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPREL16_HIGHER", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1362 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1363 32, /* rightshift */
1364 1, /* size (0 = byte, 1 = short, 2 = long) */
1365 16, /* bitsize */
1366 FALSE, /* pc_relative */
1367 0, /* bitpos */
1368 complain_overflow_dont, /* complain_on_overflow */
1369 ppc64_elf_unhandled_reloc, /* special_function */
1370 "R_PPC64_DTPREL16_HIGHERA", /* name */
1371 FALSE, /* partial_inplace */
1372 0, /* src_mask */
1373 0xffff, /* dst_mask */
1374 FALSE), /* pcrel_offset */
1375
1376 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1377 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1378 48, /* rightshift */
1379 1, /* size (0 = byte, 1 = short, 2 = long) */
1380 16, /* bitsize */
1381 FALSE, /* pc_relative */
1382 0, /* bitpos */
1383 complain_overflow_dont, /* complain_on_overflow */
1384 ppc64_elf_unhandled_reloc, /* special_function */
1385 "R_PPC64_DTPREL16_HIGHEST", /* name */
1386 FALSE, /* partial_inplace */
1387 0, /* src_mask */
1388 0xffff, /* dst_mask */
1389 FALSE), /* pcrel_offset */
1390
1391 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1392 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1393 48, /* rightshift */
1394 1, /* size (0 = byte, 1 = short, 2 = long) */
1395 16, /* bitsize */
1396 FALSE, /* pc_relative */
1397 0, /* bitpos */
1398 complain_overflow_dont, /* complain_on_overflow */
1399 ppc64_elf_unhandled_reloc, /* special_function */
1400 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1401 FALSE, /* partial_inplace */
1402 0, /* src_mask */
1403 0xffff, /* dst_mask */
1404 FALSE), /* pcrel_offset */
1405
1406 /* Like DTPREL16, but for insns with a DS field. */
1407 HOWTO (R_PPC64_DTPREL16_DS,
1408 0, /* rightshift */
1409 1, /* size (0 = byte, 1 = short, 2 = long) */
1410 16, /* bitsize */
1411 FALSE, /* pc_relative */
1412 0, /* bitpos */
1413 complain_overflow_signed, /* complain_on_overflow */
1414 ppc64_elf_unhandled_reloc, /* special_function */
1415 "R_PPC64_DTPREL16_DS", /* name */
1416 FALSE, /* partial_inplace */
1417 0, /* src_mask */
1418 0xfffc, /* dst_mask */
1419 FALSE), /* pcrel_offset */
1420
1421 /* Like DTPREL16_DS, but no overflow. */
1422 HOWTO (R_PPC64_DTPREL16_LO_DS,
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_dont, /* complain_on_overflow */
1429 ppc64_elf_unhandled_reloc, /* special_function */
1430 "R_PPC64_DTPREL16_LO_DS", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xfffc, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* Computes a tp-relative displacement, the difference between the value of
1437 sym+add and the value of the thread pointer (r13). */
1438 HOWTO (R_PPC64_TPREL64,
1439 0, /* rightshift */
1440 4, /* size (0 = byte, 1 = short, 2 = long) */
1441 64, /* bitsize */
1442 FALSE, /* pc_relative */
1443 0, /* bitpos */
1444 complain_overflow_dont, /* complain_on_overflow */
1445 ppc64_elf_unhandled_reloc, /* special_function */
1446 "R_PPC64_TPREL64", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 ONES (64), /* dst_mask */
1450 FALSE), /* pcrel_offset */
1451
1452 /* A 16 bit tprel reloc. */
1453 HOWTO (R_PPC64_TPREL16,
1454 0, /* rightshift */
1455 1, /* size (0 = byte, 1 = short, 2 = long) */
1456 16, /* bitsize */
1457 FALSE, /* pc_relative */
1458 0, /* bitpos */
1459 complain_overflow_signed, /* complain_on_overflow */
1460 ppc64_elf_unhandled_reloc, /* special_function */
1461 "R_PPC64_TPREL16", /* name */
1462 FALSE, /* partial_inplace */
1463 0, /* src_mask */
1464 0xffff, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1466
1467 /* Like TPREL16, but no overflow. */
1468 HOWTO (R_PPC64_TPREL16_LO,
1469 0, /* rightshift */
1470 1, /* size (0 = byte, 1 = short, 2 = long) */
1471 16, /* bitsize */
1472 FALSE, /* pc_relative */
1473 0, /* bitpos */
1474 complain_overflow_dont, /* complain_on_overflow */
1475 ppc64_elf_unhandled_reloc, /* special_function */
1476 "R_PPC64_TPREL16_LO", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 0xffff, /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* Like TPREL16_LO, but next higher group of 16 bits. */
1483 HOWTO (R_PPC64_TPREL16_HI,
1484 16, /* rightshift */
1485 1, /* size (0 = byte, 1 = short, 2 = long) */
1486 16, /* bitsize */
1487 FALSE, /* pc_relative */
1488 0, /* bitpos */
1489 complain_overflow_dont, /* complain_on_overflow */
1490 ppc64_elf_unhandled_reloc, /* special_function */
1491 "R_PPC64_TPREL16_HI", /* name */
1492 FALSE, /* partial_inplace */
1493 0, /* src_mask */
1494 0xffff, /* dst_mask */
1495 FALSE), /* pcrel_offset */
1496
1497 /* Like TPREL16_HI, but adjust for low 16 bits. */
1498 HOWTO (R_PPC64_TPREL16_HA,
1499 16, /* rightshift */
1500 1, /* size (0 = byte, 1 = short, 2 = long) */
1501 16, /* bitsize */
1502 FALSE, /* pc_relative */
1503 0, /* bitpos */
1504 complain_overflow_dont, /* complain_on_overflow */
1505 ppc64_elf_unhandled_reloc, /* special_function */
1506 "R_PPC64_TPREL16_HA", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0xffff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Like TPREL16_HI, but next higher group of 16 bits. */
1513 HOWTO (R_PPC64_TPREL16_HIGHER,
1514 32, /* rightshift */
1515 1, /* size (0 = byte, 1 = short, 2 = long) */
1516 16, /* bitsize */
1517 FALSE, /* pc_relative */
1518 0, /* bitpos */
1519 complain_overflow_dont, /* complain_on_overflow */
1520 ppc64_elf_unhandled_reloc, /* special_function */
1521 "R_PPC64_TPREL16_HIGHER", /* name */
1522 FALSE, /* partial_inplace */
1523 0, /* src_mask */
1524 0xffff, /* dst_mask */
1525 FALSE), /* pcrel_offset */
1526
1527 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1528 HOWTO (R_PPC64_TPREL16_HIGHERA,
1529 32, /* rightshift */
1530 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 16, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_dont, /* complain_on_overflow */
1535 ppc64_elf_unhandled_reloc, /* special_function */
1536 "R_PPC64_TPREL16_HIGHERA", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0xffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1543 HOWTO (R_PPC64_TPREL16_HIGHEST,
1544 48, /* rightshift */
1545 1, /* size (0 = byte, 1 = short, 2 = long) */
1546 16, /* bitsize */
1547 FALSE, /* pc_relative */
1548 0, /* bitpos */
1549 complain_overflow_dont, /* complain_on_overflow */
1550 ppc64_elf_unhandled_reloc, /* special_function */
1551 "R_PPC64_TPREL16_HIGHEST", /* name */
1552 FALSE, /* partial_inplace */
1553 0, /* src_mask */
1554 0xffff, /* dst_mask */
1555 FALSE), /* pcrel_offset */
1556
1557 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1558 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1559 48, /* rightshift */
1560 1, /* size (0 = byte, 1 = short, 2 = long) */
1561 16, /* bitsize */
1562 FALSE, /* pc_relative */
1563 0, /* bitpos */
1564 complain_overflow_dont, /* complain_on_overflow */
1565 ppc64_elf_unhandled_reloc, /* special_function */
1566 "R_PPC64_TPREL16_HIGHESTA", /* name */
1567 FALSE, /* partial_inplace */
1568 0, /* src_mask */
1569 0xffff, /* dst_mask */
1570 FALSE), /* pcrel_offset */
1571
1572 /* Like TPREL16, but for insns with a DS field. */
1573 HOWTO (R_PPC64_TPREL16_DS,
1574 0, /* rightshift */
1575 1, /* size (0 = byte, 1 = short, 2 = long) */
1576 16, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_signed, /* complain_on_overflow */
1580 ppc64_elf_unhandled_reloc, /* special_function */
1581 "R_PPC64_TPREL16_DS", /* name */
1582 FALSE, /* partial_inplace */
1583 0, /* src_mask */
1584 0xfffc, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 /* Like TPREL16_DS, but no overflow. */
1588 HOWTO (R_PPC64_TPREL16_LO_DS,
1589 0, /* rightshift */
1590 1, /* size (0 = byte, 1 = short, 2 = long) */
1591 16, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_dont, /* complain_on_overflow */
1595 ppc64_elf_unhandled_reloc, /* special_function */
1596 "R_PPC64_TPREL16_LO_DS", /* name */
1597 FALSE, /* partial_inplace */
1598 0, /* src_mask */
1599 0xfffc, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1603 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1604 to the first entry relative to the TOC base (r2). */
1605 HOWTO (R_PPC64_GOT_TLSGD16,
1606 0, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_signed, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_GOT_TLSGD16", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like GOT_TLSGD16, but no overflow. */
1620 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1621 0, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_GOT_TLSGD16_LO", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1636 16, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_GOT_TLSGD16_HI", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1651 16, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_GOT_TLSGD16_HA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1665 with values (sym+add)@dtpmod and zero, and computes the offset to the
1666 first entry relative to the TOC base (r2). */
1667 HOWTO (R_PPC64_GOT_TLSLD16,
1668 0, /* rightshift */
1669 1, /* size (0 = byte, 1 = short, 2 = long) */
1670 16, /* bitsize */
1671 FALSE, /* pc_relative */
1672 0, /* bitpos */
1673 complain_overflow_signed, /* complain_on_overflow */
1674 ppc64_elf_unhandled_reloc, /* special_function */
1675 "R_PPC64_GOT_TLSLD16", /* name */
1676 FALSE, /* partial_inplace */
1677 0, /* src_mask */
1678 0xffff, /* dst_mask */
1679 FALSE), /* pcrel_offset */
1680
1681 /* Like GOT_TLSLD16, but no overflow. */
1682 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1683 0, /* rightshift */
1684 1, /* size (0 = byte, 1 = short, 2 = long) */
1685 16, /* bitsize */
1686 FALSE, /* pc_relative */
1687 0, /* bitpos */
1688 complain_overflow_dont, /* complain_on_overflow */
1689 ppc64_elf_unhandled_reloc, /* special_function */
1690 "R_PPC64_GOT_TLSLD16_LO", /* name */
1691 FALSE, /* partial_inplace */
1692 0, /* src_mask */
1693 0xffff, /* dst_mask */
1694 FALSE), /* pcrel_offset */
1695
1696 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1697 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1698 16, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_dont, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSLD16_HI", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1712 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1713 16, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSLD16_HA", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1727 the offset to the entry relative to the TOC base (r2). */
1728 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1729 0, /* rightshift */
1730 1, /* size (0 = byte, 1 = short, 2 = long) */
1731 16, /* bitsize */
1732 FALSE, /* pc_relative */
1733 0, /* bitpos */
1734 complain_overflow_signed, /* complain_on_overflow */
1735 ppc64_elf_unhandled_reloc, /* special_function */
1736 "R_PPC64_GOT_DTPREL16_DS", /* name */
1737 FALSE, /* partial_inplace */
1738 0, /* src_mask */
1739 0xfffc, /* dst_mask */
1740 FALSE), /* pcrel_offset */
1741
1742 /* Like GOT_DTPREL16_DS, but no overflow. */
1743 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1744 0, /* rightshift */
1745 1, /* size (0 = byte, 1 = short, 2 = long) */
1746 16, /* bitsize */
1747 FALSE, /* pc_relative */
1748 0, /* bitpos */
1749 complain_overflow_dont, /* complain_on_overflow */
1750 ppc64_elf_unhandled_reloc, /* special_function */
1751 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1752 FALSE, /* partial_inplace */
1753 0, /* src_mask */
1754 0xfffc, /* dst_mask */
1755 FALSE), /* pcrel_offset */
1756
1757 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1758 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1759 16, /* rightshift */
1760 1, /* size (0 = byte, 1 = short, 2 = long) */
1761 16, /* bitsize */
1762 FALSE, /* pc_relative */
1763 0, /* bitpos */
1764 complain_overflow_dont, /* complain_on_overflow */
1765 ppc64_elf_unhandled_reloc, /* special_function */
1766 "R_PPC64_GOT_DTPREL16_HI", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xffff, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1773 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1774 16, /* rightshift */
1775 1, /* size (0 = byte, 1 = short, 2 = long) */
1776 16, /* bitsize */
1777 FALSE, /* pc_relative */
1778 0, /* bitpos */
1779 complain_overflow_dont, /* complain_on_overflow */
1780 ppc64_elf_unhandled_reloc, /* special_function */
1781 "R_PPC64_GOT_DTPREL16_HA", /* name */
1782 FALSE, /* partial_inplace */
1783 0, /* src_mask */
1784 0xffff, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1786
1787 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1788 offset to the entry relative to the TOC base (r2). */
1789 HOWTO (R_PPC64_GOT_TPREL16_DS,
1790 0, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TPREL16_DS", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xfffc, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TPREL16_DS, but no overflow. */
1804 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1805 0, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_dont, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xfffc, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1819 HOWTO (R_PPC64_GOT_TPREL16_HI,
1820 16, /* rightshift */
1821 1, /* size (0 = byte, 1 = short, 2 = long) */
1822 16, /* bitsize */
1823 FALSE, /* pc_relative */
1824 0, /* bitpos */
1825 complain_overflow_dont, /* complain_on_overflow */
1826 ppc64_elf_unhandled_reloc, /* special_function */
1827 "R_PPC64_GOT_TPREL16_HI", /* name */
1828 FALSE, /* partial_inplace */
1829 0, /* src_mask */
1830 0xffff, /* dst_mask */
1831 FALSE), /* pcrel_offset */
1832
1833 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1834 HOWTO (R_PPC64_GOT_TPREL16_HA,
1835 16, /* rightshift */
1836 1, /* size (0 = byte, 1 = short, 2 = long) */
1837 16, /* bitsize */
1838 FALSE, /* pc_relative */
1839 0, /* bitpos */
1840 complain_overflow_dont, /* complain_on_overflow */
1841 ppc64_elf_unhandled_reloc, /* special_function */
1842 "R_PPC64_GOT_TPREL16_HA", /* name */
1843 FALSE, /* partial_inplace */
1844 0, /* src_mask */
1845 0xffff, /* dst_mask */
1846 FALSE), /* pcrel_offset */
1847
1848 /* GNU extension to record C++ vtable hierarchy. */
1849 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1850 0, /* rightshift */
1851 0, /* size (0 = byte, 1 = short, 2 = long) */
1852 0, /* bitsize */
1853 FALSE, /* pc_relative */
1854 0, /* bitpos */
1855 complain_overflow_dont, /* complain_on_overflow */
1856 NULL, /* special_function */
1857 "R_PPC64_GNU_VTINHERIT", /* name */
1858 FALSE, /* partial_inplace */
1859 0, /* src_mask */
1860 0, /* dst_mask */
1861 FALSE), /* pcrel_offset */
1862
1863 /* GNU extension to record C++ vtable member usage. */
1864 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1865 0, /* rightshift */
1866 0, /* size (0 = byte, 1 = short, 2 = long) */
1867 0, /* bitsize */
1868 FALSE, /* pc_relative */
1869 0, /* bitpos */
1870 complain_overflow_dont, /* complain_on_overflow */
1871 NULL, /* special_function */
1872 "R_PPC64_GNU_VTENTRY", /* name */
1873 FALSE, /* partial_inplace */
1874 0, /* src_mask */
1875 0, /* dst_mask */
1876 FALSE), /* pcrel_offset */
1877 };
1878
1879 \f
1880 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1881 be done. */
1882
1883 static void
1884 ppc_howto_init (void)
1885 {
1886 unsigned int i, type;
1887
1888 for (i = 0;
1889 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1890 i++)
1891 {
1892 type = ppc64_elf_howto_raw[i].type;
1893 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1894 / sizeof (ppc64_elf_howto_table[0])));
1895 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1896 }
1897 }
1898
1899 static reloc_howto_type *
1900 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1901 bfd_reloc_code_real_type code)
1902 {
1903 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1904
1905 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1906 /* Initialize howto table if needed. */
1907 ppc_howto_init ();
1908
1909 switch (code)
1910 {
1911 default:
1912 return NULL;
1913
1914 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1915 break;
1916 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1917 break;
1918 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1919 break;
1920 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1921 break;
1922 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1923 break;
1924 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1925 break;
1926 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1927 break;
1928 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1929 break;
1930 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1931 break;
1932 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1933 break;
1934 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1935 break;
1936 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1937 break;
1938 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1939 break;
1940 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1941 break;
1942 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1943 break;
1944 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1945 break;
1946 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1947 break;
1948 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1949 break;
1950 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1951 break;
1952 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1953 break;
1954 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1955 break;
1956 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1957 break;
1958 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1959 break;
1960 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1961 break;
1962 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1963 break;
1964 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1965 break;
1966 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1967 break;
1968 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1969 break;
1970 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1971 break;
1972 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1973 break;
1974 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1975 break;
1976 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1977 break;
1978 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1979 break;
1980 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1981 break;
1982 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1983 break;
1984 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1985 break;
1986 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1987 break;
1988 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1989 break;
1990 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1991 break;
1992 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1993 break;
1994 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1995 break;
1996 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1997 break;
1998 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1999 break;
2000 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2001 break;
2002 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2003 break;
2004 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2005 break;
2006 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2007 break;
2008 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2009 break;
2010 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2011 break;
2012 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2013 break;
2014 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2015 break;
2016 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2017 break;
2018 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2019 break;
2020 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2021 break;
2022 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2023 break;
2024 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2025 break;
2026 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2027 break;
2028 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2029 break;
2030 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2031 break;
2032 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2033 break;
2034 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2035 break;
2036 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2037 break;
2038 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2039 break;
2040 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2041 break;
2042 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2043 break;
2044 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2045 break;
2046 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2047 break;
2048 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2049 break;
2050 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2051 break;
2052 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2053 break;
2054 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2065 break;
2066 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2067 break;
2068 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2069 break;
2070 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2071 break;
2072 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2073 break;
2074 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2075 break;
2076 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2077 break;
2078 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2079 break;
2080 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2081 break;
2082 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2083 break;
2084 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2085 break;
2086 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2087 break;
2088 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2089 break;
2090 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2091 break;
2092 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2093 break;
2094 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2095 break;
2096 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2097 break;
2098 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2099 break;
2100 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2101 break;
2102 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2103 break;
2104 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2105 break;
2106 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2107 break;
2108 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2109 break;
2110 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2111 break;
2112 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2113 break;
2114 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2115 break;
2116 }
2117
2118 return ppc64_elf_howto_table[r];
2119 };
2120
2121 static reloc_howto_type *
2122 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2123 const char *r_name)
2124 {
2125 unsigned int i;
2126
2127 for (i = 0;
2128 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2129 i++)
2130 if (ppc64_elf_howto_raw[i].name != NULL
2131 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2132 return &ppc64_elf_howto_raw[i];
2133
2134 return NULL;
2135 }
2136
2137 /* Set the howto pointer for a PowerPC ELF reloc. */
2138
2139 static void
2140 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2141 Elf_Internal_Rela *dst)
2142 {
2143 unsigned int type;
2144
2145 /* Initialize howto table if needed. */
2146 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2147 ppc_howto_init ();
2148
2149 type = ELF64_R_TYPE (dst->r_info);
2150 if (type >= (sizeof (ppc64_elf_howto_table)
2151 / sizeof (ppc64_elf_howto_table[0])))
2152 {
2153 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2154 abfd, (int) type);
2155 type = R_PPC64_NONE;
2156 }
2157 cache_ptr->howto = ppc64_elf_howto_table[type];
2158 }
2159
2160 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2161
2162 static bfd_reloc_status_type
2163 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2164 void *data, asection *input_section,
2165 bfd *output_bfd, char **error_message)
2166 {
2167 /* If this is a relocatable link (output_bfd test tells us), just
2168 call the generic function. Any adjustment will be done at final
2169 link time. */
2170 if (output_bfd != NULL)
2171 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2172 input_section, output_bfd, error_message);
2173
2174 /* Adjust the addend for sign extension of the low 16 bits.
2175 We won't actually be using the low 16 bits, so trashing them
2176 doesn't matter. */
2177 reloc_entry->addend += 0x8000;
2178 return bfd_reloc_continue;
2179 }
2180
2181 static bfd_reloc_status_type
2182 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2183 void *data, asection *input_section,
2184 bfd *output_bfd, char **error_message)
2185 {
2186 if (output_bfd != NULL)
2187 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2188 input_section, output_bfd, error_message);
2189
2190 if (strcmp (symbol->section->name, ".opd") == 0
2191 && (symbol->section->owner->flags & DYNAMIC) == 0)
2192 {
2193 bfd_vma dest = opd_entry_value (symbol->section,
2194 symbol->value + reloc_entry->addend,
2195 NULL, NULL);
2196 if (dest != (bfd_vma) -1)
2197 reloc_entry->addend = dest - (symbol->value
2198 + symbol->section->output_section->vma
2199 + symbol->section->output_offset);
2200 }
2201 return bfd_reloc_continue;
2202 }
2203
2204 static bfd_reloc_status_type
2205 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2206 void *data, asection *input_section,
2207 bfd *output_bfd, char **error_message)
2208 {
2209 long insn;
2210 enum elf_ppc64_reloc_type r_type;
2211 bfd_size_type octets;
2212 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2213 bfd_boolean is_power4 = FALSE;
2214
2215 /* If this is a relocatable link (output_bfd test tells us), just
2216 call the generic function. Any adjustment will be done at final
2217 link time. */
2218 if (output_bfd != NULL)
2219 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2220 input_section, output_bfd, error_message);
2221
2222 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2223 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2224 insn &= ~(0x01 << 21);
2225 r_type = reloc_entry->howto->type;
2226 if (r_type == R_PPC64_ADDR14_BRTAKEN
2227 || r_type == R_PPC64_REL14_BRTAKEN)
2228 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2229
2230 if (is_power4)
2231 {
2232 /* Set 'a' bit. This is 0b00010 in BO field for branch
2233 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2234 for branch on CTR insns (BO == 1a00t or 1a01t). */
2235 if ((insn & (0x14 << 21)) == (0x04 << 21))
2236 insn |= 0x02 << 21;
2237 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2238 insn |= 0x08 << 21;
2239 else
2240 goto out;
2241 }
2242 else
2243 {
2244 bfd_vma target = 0;
2245 bfd_vma from;
2246
2247 if (!bfd_is_com_section (symbol->section))
2248 target = symbol->value;
2249 target += symbol->section->output_section->vma;
2250 target += symbol->section->output_offset;
2251 target += reloc_entry->addend;
2252
2253 from = (reloc_entry->address
2254 + input_section->output_offset
2255 + input_section->output_section->vma);
2256
2257 /* Invert 'y' bit if not the default. */
2258 if ((bfd_signed_vma) (target - from) < 0)
2259 insn ^= 0x01 << 21;
2260 }
2261 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2262 out:
2263 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2264 input_section, output_bfd, error_message);
2265 }
2266
2267 static bfd_reloc_status_type
2268 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2269 void *data, asection *input_section,
2270 bfd *output_bfd, char **error_message)
2271 {
2272 /* If this is a relocatable link (output_bfd test tells us), just
2273 call the generic function. Any adjustment will be done at final
2274 link time. */
2275 if (output_bfd != NULL)
2276 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2277 input_section, output_bfd, error_message);
2278
2279 /* Subtract the symbol section base address. */
2280 reloc_entry->addend -= symbol->section->output_section->vma;
2281 return bfd_reloc_continue;
2282 }
2283
2284 static bfd_reloc_status_type
2285 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2286 void *data, asection *input_section,
2287 bfd *output_bfd, char **error_message)
2288 {
2289 /* If this is a relocatable link (output_bfd test tells us), just
2290 call the generic function. Any adjustment will be done at final
2291 link time. */
2292 if (output_bfd != NULL)
2293 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2294 input_section, output_bfd, error_message);
2295
2296 /* Subtract the symbol section base address. */
2297 reloc_entry->addend -= symbol->section->output_section->vma;
2298
2299 /* Adjust the addend for sign extension of the low 16 bits. */
2300 reloc_entry->addend += 0x8000;
2301 return bfd_reloc_continue;
2302 }
2303
2304 static bfd_reloc_status_type
2305 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2306 void *data, asection *input_section,
2307 bfd *output_bfd, char **error_message)
2308 {
2309 bfd_vma TOCstart;
2310
2311 /* If this is a relocatable link (output_bfd test tells us), just
2312 call the generic function. Any adjustment will be done at final
2313 link time. */
2314 if (output_bfd != NULL)
2315 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2316 input_section, output_bfd, error_message);
2317
2318 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2319 if (TOCstart == 0)
2320 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2321
2322 /* Subtract the TOC base address. */
2323 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2324 return bfd_reloc_continue;
2325 }
2326
2327 static bfd_reloc_status_type
2328 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2329 void *data, asection *input_section,
2330 bfd *output_bfd, char **error_message)
2331 {
2332 bfd_vma TOCstart;
2333
2334 /* If this is a relocatable link (output_bfd test tells us), just
2335 call the generic function. Any adjustment will be done at final
2336 link time. */
2337 if (output_bfd != NULL)
2338 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2339 input_section, output_bfd, error_message);
2340
2341 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2342 if (TOCstart == 0)
2343 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2344
2345 /* Subtract the TOC base address. */
2346 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2347
2348 /* Adjust the addend for sign extension of the low 16 bits. */
2349 reloc_entry->addend += 0x8000;
2350 return bfd_reloc_continue;
2351 }
2352
2353 static bfd_reloc_status_type
2354 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2355 void *data, asection *input_section,
2356 bfd *output_bfd, char **error_message)
2357 {
2358 bfd_vma TOCstart;
2359 bfd_size_type octets;
2360
2361 /* If this is a relocatable link (output_bfd test tells us), just
2362 call the generic function. Any adjustment will be done at final
2363 link time. */
2364 if (output_bfd != NULL)
2365 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2366 input_section, output_bfd, error_message);
2367
2368 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2369 if (TOCstart == 0)
2370 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2371
2372 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2373 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2374 return bfd_reloc_ok;
2375 }
2376
2377 static bfd_reloc_status_type
2378 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2379 void *data, asection *input_section,
2380 bfd *output_bfd, char **error_message)
2381 {
2382 /* If this is a relocatable link (output_bfd test tells us), just
2383 call the generic function. Any adjustment will be done at final
2384 link time. */
2385 if (output_bfd != NULL)
2386 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2387 input_section, output_bfd, error_message);
2388
2389 if (error_message != NULL)
2390 {
2391 static char buf[60];
2392 sprintf (buf, "generic linker can't handle %s",
2393 reloc_entry->howto->name);
2394 *error_message = buf;
2395 }
2396 return bfd_reloc_dangerous;
2397 }
2398
2399 struct ppc64_elf_obj_tdata
2400 {
2401 struct elf_obj_tdata elf;
2402
2403 /* Shortcuts to dynamic linker sections. */
2404 asection *got;
2405 asection *relgot;
2406
2407 /* Used during garbage collection. We attach global symbols defined
2408 on removed .opd entries to this section so that the sym is removed. */
2409 asection *deleted_section;
2410
2411 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2412 sections means we potentially need one of these for each input bfd. */
2413 union {
2414 bfd_signed_vma refcount;
2415 bfd_vma offset;
2416 } tlsld_got;
2417
2418 /* A copy of relocs before they are modified for --emit-relocs. */
2419 Elf_Internal_Rela *opd_relocs;
2420 };
2421
2422 #define ppc64_elf_tdata(bfd) \
2423 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2424
2425 #define ppc64_tlsld_got(bfd) \
2426 (&ppc64_elf_tdata (bfd)->tlsld_got)
2427
2428 /* Override the generic function because we store some extras. */
2429
2430 static bfd_boolean
2431 ppc64_elf_mkobject (bfd *abfd)
2432 {
2433 if (abfd->tdata.any == NULL)
2434 {
2435 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2436 abfd->tdata.any = bfd_zalloc (abfd, amt);
2437 if (abfd->tdata.any == NULL)
2438 return FALSE;
2439 }
2440 return bfd_elf_mkobject (abfd);
2441 }
2442
2443 /* Return 1 if target is one of ours. */
2444
2445 static bfd_boolean
2446 is_ppc64_elf_target (const struct bfd_target *targ)
2447 {
2448 extern const bfd_target bfd_elf64_powerpc_vec;
2449 extern const bfd_target bfd_elf64_powerpcle_vec;
2450
2451 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2452 }
2453
2454 /* Fix bad default arch selected for a 64 bit input bfd when the
2455 default is 32 bit. */
2456
2457 static bfd_boolean
2458 ppc64_elf_object_p (bfd *abfd)
2459 {
2460 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2461 {
2462 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2463
2464 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2465 {
2466 /* Relies on arch after 32 bit default being 64 bit default. */
2467 abfd->arch_info = abfd->arch_info->next;
2468 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2469 }
2470 }
2471 return TRUE;
2472 }
2473
2474 /* Support for core dump NOTE sections. */
2475
2476 static bfd_boolean
2477 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2478 {
2479 size_t offset, size;
2480
2481 if (note->descsz != 504)
2482 return FALSE;
2483
2484 /* pr_cursig */
2485 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2486
2487 /* pr_pid */
2488 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2489
2490 /* pr_reg */
2491 offset = 112;
2492 size = 384;
2493
2494 /* Make a ".reg/999" section. */
2495 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2496 size, note->descpos + offset);
2497 }
2498
2499 static bfd_boolean
2500 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2501 {
2502 if (note->descsz != 136)
2503 return FALSE;
2504
2505 elf_tdata (abfd)->core_program
2506 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2507 elf_tdata (abfd)->core_command
2508 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2509
2510 return TRUE;
2511 }
2512
2513 static char *
2514 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2515 ...)
2516 {
2517 switch (note_type)
2518 {
2519 default:
2520 return NULL;
2521
2522 case NT_PRPSINFO:
2523 {
2524 char data[136];
2525 va_list ap;
2526
2527 va_start (ap, note_type);
2528 memset (data, 0, 40);
2529 strncpy (data + 40, va_arg (ap, const char *), 16);
2530 strncpy (data + 56, va_arg (ap, const char *), 80);
2531 va_end (ap);
2532 return elfcore_write_note (abfd, buf, bufsiz,
2533 "CORE", note_type, data, sizeof (data));
2534 }
2535
2536 case NT_PRSTATUS:
2537 {
2538 char data[504];
2539 va_list ap;
2540 long pid;
2541 int cursig;
2542 const void *greg;
2543
2544 va_start (ap, note_type);
2545 memset (data, 0, 112);
2546 pid = va_arg (ap, long);
2547 bfd_put_32 (abfd, pid, data + 32);
2548 cursig = va_arg (ap, int);
2549 bfd_put_16 (abfd, cursig, data + 12);
2550 greg = va_arg (ap, const void *);
2551 memcpy (data + 112, greg, 384);
2552 memset (data + 496, 0, 8);
2553 va_end (ap);
2554 return elfcore_write_note (abfd, buf, bufsiz,
2555 "CORE", note_type, data, sizeof (data));
2556 }
2557 }
2558 }
2559
2560 /* Merge backend specific data from an object file to the output
2561 object file when linking. */
2562
2563 static bfd_boolean
2564 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2565 {
2566 /* Check if we have the same endianess. */
2567 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2568 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2569 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2570 {
2571 const char *msg;
2572
2573 if (bfd_big_endian (ibfd))
2574 msg = _("%B: compiled for a big endian system "
2575 "and target is little endian");
2576 else
2577 msg = _("%B: compiled for a little endian system "
2578 "and target is big endian");
2579
2580 (*_bfd_error_handler) (msg, ibfd);
2581
2582 bfd_set_error (bfd_error_wrong_format);
2583 return FALSE;
2584 }
2585
2586 return TRUE;
2587 }
2588
2589 /* Add extra PPC sections. */
2590
2591 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2592 {
2593 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2594 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2595 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2596 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2597 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2598 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2599 { NULL, 0, 0, 0, 0 }
2600 };
2601
2602 enum _ppc64_sec_type {
2603 sec_normal = 0,
2604 sec_opd = 1,
2605 sec_toc = 2
2606 };
2607
2608 struct _ppc64_elf_section_data
2609 {
2610 struct bfd_elf_section_data elf;
2611
2612 union
2613 {
2614 /* An array with one entry for each opd function descriptor. */
2615 struct _opd_sec_data
2616 {
2617 /* Points to the function code section for local opd entries. */
2618 asection **func_sec;
2619
2620 /* After editing .opd, adjust references to opd local syms. */
2621 long *adjust;
2622 } opd;
2623
2624 /* An array for toc sections, indexed by offset/8.
2625 Specifies the relocation symbol index used at a given toc offset. */
2626 unsigned *t_symndx;
2627 } u;
2628
2629 enum _ppc64_sec_type sec_type:2;
2630
2631 /* Flag set when small branches are detected. Used to
2632 select suitable defaults for the stub group size. */
2633 unsigned int has_14bit_branch:1;
2634 };
2635
2636 #define ppc64_elf_section_data(sec) \
2637 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2638
2639 static bfd_boolean
2640 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2641 {
2642 if (!sec->used_by_bfd)
2643 {
2644 struct _ppc64_elf_section_data *sdata;
2645 bfd_size_type amt = sizeof (*sdata);
2646
2647 sdata = bfd_zalloc (abfd, amt);
2648 if (sdata == NULL)
2649 return FALSE;
2650 sec->used_by_bfd = sdata;
2651 }
2652
2653 return _bfd_elf_new_section_hook (abfd, sec);
2654 }
2655
2656 static struct _opd_sec_data *
2657 get_opd_info (asection * sec)
2658 {
2659 if (sec != NULL
2660 && ppc64_elf_section_data (sec) != NULL
2661 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2662 return &ppc64_elf_section_data (sec)->u.opd;
2663 return NULL;
2664 }
2665 \f
2666 /* Parameters for the qsort hook. */
2667 static asection *synthetic_opd;
2668 static bfd_boolean synthetic_relocatable;
2669
2670 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2671
2672 static int
2673 compare_symbols (const void *ap, const void *bp)
2674 {
2675 const asymbol *a = * (const asymbol **) ap;
2676 const asymbol *b = * (const asymbol **) bp;
2677
2678 /* Section symbols first. */
2679 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2680 return -1;
2681 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2682 return 1;
2683
2684 /* then .opd symbols. */
2685 if (a->section == synthetic_opd && b->section != synthetic_opd)
2686 return -1;
2687 if (a->section != synthetic_opd && b->section == synthetic_opd)
2688 return 1;
2689
2690 /* then other code symbols. */
2691 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2692 == (SEC_CODE | SEC_ALLOC)
2693 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2694 != (SEC_CODE | SEC_ALLOC))
2695 return -1;
2696
2697 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2698 != (SEC_CODE | SEC_ALLOC)
2699 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2700 == (SEC_CODE | SEC_ALLOC))
2701 return 1;
2702
2703 if (synthetic_relocatable)
2704 {
2705 if (a->section->id < b->section->id)
2706 return -1;
2707
2708 if (a->section->id > b->section->id)
2709 return 1;
2710 }
2711
2712 if (a->value + a->section->vma < b->value + b->section->vma)
2713 return -1;
2714
2715 if (a->value + a->section->vma > b->value + b->section->vma)
2716 return 1;
2717
2718 /* For syms with the same value, prefer strong dynamic global function
2719 syms over other syms. */
2720 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2721 return -1;
2722
2723 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2724 return 1;
2725
2726 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2727 return -1;
2728
2729 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2730 return 1;
2731
2732 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2733 return -1;
2734
2735 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2736 return 1;
2737
2738 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2739 return -1;
2740
2741 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2742 return 1;
2743
2744 return 0;
2745 }
2746
2747 /* Search SYMS for a symbol of the given VALUE. */
2748
2749 static asymbol *
2750 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2751 {
2752 long mid;
2753
2754 if (id == -1)
2755 {
2756 while (lo < hi)
2757 {
2758 mid = (lo + hi) >> 1;
2759 if (syms[mid]->value + syms[mid]->section->vma < value)
2760 lo = mid + 1;
2761 else if (syms[mid]->value + syms[mid]->section->vma > value)
2762 hi = mid;
2763 else
2764 return syms[mid];
2765 }
2766 }
2767 else
2768 {
2769 while (lo < hi)
2770 {
2771 mid = (lo + hi) >> 1;
2772 if (syms[mid]->section->id < id)
2773 lo = mid + 1;
2774 else if (syms[mid]->section->id > id)
2775 hi = mid;
2776 else if (syms[mid]->value < value)
2777 lo = mid + 1;
2778 else if (syms[mid]->value > value)
2779 hi = mid;
2780 else
2781 return syms[mid];
2782 }
2783 }
2784 return NULL;
2785 }
2786
2787 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2788 entry syms. */
2789
2790 static long
2791 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2792 long static_count, asymbol **static_syms,
2793 long dyn_count, asymbol **dyn_syms,
2794 asymbol **ret)
2795 {
2796 asymbol *s;
2797 long i;
2798 long count;
2799 char *names;
2800 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2801 asection *opd;
2802 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2803 asymbol **syms;
2804
2805 *ret = NULL;
2806
2807 opd = bfd_get_section_by_name (abfd, ".opd");
2808 if (opd == NULL)
2809 return 0;
2810
2811 symcount = static_count;
2812 if (!relocatable)
2813 symcount += dyn_count;
2814 if (symcount == 0)
2815 return 0;
2816
2817 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2818 if (syms == NULL)
2819 return -1;
2820
2821 if (!relocatable && static_count != 0 && dyn_count != 0)
2822 {
2823 /* Use both symbol tables. */
2824 memcpy (syms, static_syms, static_count * sizeof (*syms));
2825 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2826 }
2827 else if (!relocatable && static_count == 0)
2828 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2829 else
2830 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2831
2832 synthetic_opd = opd;
2833 synthetic_relocatable = relocatable;
2834 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2835
2836 if (!relocatable && symcount > 1)
2837 {
2838 long j;
2839 /* Trim duplicate syms, since we may have merged the normal and
2840 dynamic symbols. Actually, we only care about syms that have
2841 different values, so trim any with the same value. */
2842 for (i = 1, j = 1; i < symcount; ++i)
2843 if (syms[i - 1]->value + syms[i - 1]->section->vma
2844 != syms[i]->value + syms[i]->section->vma)
2845 syms[j++] = syms[i];
2846 symcount = j;
2847 }
2848
2849 i = 0;
2850 if (syms[i]->section == opd)
2851 ++i;
2852 codesecsym = i;
2853
2854 for (; i < symcount; ++i)
2855 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2856 != (SEC_CODE | SEC_ALLOC))
2857 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2858 break;
2859 codesecsymend = i;
2860
2861 for (; i < symcount; ++i)
2862 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2863 break;
2864 secsymend = i;
2865
2866 for (; i < symcount; ++i)
2867 if (syms[i]->section != opd)
2868 break;
2869 opdsymend = i;
2870
2871 for (; i < symcount; ++i)
2872 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 != (SEC_CODE | SEC_ALLOC))
2874 break;
2875 symcount = i;
2876
2877 count = 0;
2878 if (opdsymend == secsymend)
2879 goto done;
2880
2881 if (relocatable)
2882 {
2883 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2884 arelent *r;
2885 size_t size;
2886 long relcount;
2887
2888 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2889 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2890 if (relcount == 0)
2891 goto done;
2892
2893 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2894 {
2895 count = -1;
2896 goto done;
2897 }
2898
2899 size = 0;
2900 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2901 {
2902 asymbol *sym;
2903
2904 while (r < opd->relocation + relcount
2905 && r->address < syms[i]->value + opd->vma)
2906 ++r;
2907
2908 if (r == opd->relocation + relcount)
2909 break;
2910
2911 if (r->address != syms[i]->value + opd->vma)
2912 continue;
2913
2914 if (r->howto->type != R_PPC64_ADDR64)
2915 continue;
2916
2917 sym = *r->sym_ptr_ptr;
2918 if (!sym_exists_at (syms, opdsymend, symcount,
2919 sym->section->id, sym->value + r->addend))
2920 {
2921 ++count;
2922 size += sizeof (asymbol);
2923 size += strlen (syms[i]->name) + 2;
2924 }
2925 }
2926
2927 s = *ret = bfd_malloc (size);
2928 if (s == NULL)
2929 {
2930 count = -1;
2931 goto done;
2932 }
2933
2934 names = (char *) (s + count);
2935
2936 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2937 {
2938 asymbol *sym;
2939
2940 while (r < opd->relocation + relcount
2941 && r->address < syms[i]->value + opd->vma)
2942 ++r;
2943
2944 if (r == opd->relocation + relcount)
2945 break;
2946
2947 if (r->address != syms[i]->value + opd->vma)
2948 continue;
2949
2950 if (r->howto->type != R_PPC64_ADDR64)
2951 continue;
2952
2953 sym = *r->sym_ptr_ptr;
2954 if (!sym_exists_at (syms, opdsymend, symcount,
2955 sym->section->id, sym->value + r->addend))
2956 {
2957 size_t len;
2958
2959 *s = *syms[i];
2960 s->section = sym->section;
2961 s->value = sym->value + r->addend;
2962 s->name = names;
2963 *names++ = '.';
2964 len = strlen (syms[i]->name);
2965 memcpy (names, syms[i]->name, len + 1);
2966 names += len + 1;
2967 /* Have udata.p point back to the original symbol this
2968 synthetic symbol was derived from. */
2969 s->udata.p = syms[i];
2970 s++;
2971 }
2972 }
2973 }
2974 else
2975 {
2976 bfd_byte *contents;
2977 size_t size;
2978
2979 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2980 {
2981 if (contents)
2982 {
2983 free_contents_and_exit:
2984 free (contents);
2985 }
2986 count = -1;
2987 goto done;
2988 }
2989
2990 size = 0;
2991 for (i = secsymend; i < opdsymend; ++i)
2992 {
2993 bfd_vma ent;
2994
2995 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2996 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2997 {
2998 ++count;
2999 size += sizeof (asymbol);
3000 size += strlen (syms[i]->name) + 2;
3001 }
3002 }
3003
3004 s = *ret = bfd_malloc (size);
3005 if (s == NULL)
3006 goto free_contents_and_exit;
3007
3008 names = (char *) (s + count);
3009
3010 for (i = secsymend; i < opdsymend; ++i)
3011 {
3012 bfd_vma ent;
3013
3014 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3015 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3016 {
3017 long lo, hi;
3018 size_t len;
3019 asection *sec = abfd->sections;
3020
3021 *s = *syms[i];
3022 lo = codesecsym;
3023 hi = codesecsymend;
3024 while (lo < hi)
3025 {
3026 long mid = (lo + hi) >> 1;
3027 if (syms[mid]->section->vma < ent)
3028 lo = mid + 1;
3029 else if (syms[mid]->section->vma > ent)
3030 hi = mid;
3031 else
3032 {
3033 sec = syms[mid]->section;
3034 break;
3035 }
3036 }
3037
3038 if (lo >= hi && lo > codesecsym)
3039 sec = syms[lo - 1]->section;
3040
3041 for (; sec != NULL; sec = sec->next)
3042 {
3043 if (sec->vma > ent)
3044 break;
3045 if ((sec->flags & SEC_ALLOC) == 0
3046 || (sec->flags & SEC_LOAD) == 0)
3047 break;
3048 if ((sec->flags & SEC_CODE) != 0)
3049 s->section = sec;
3050 }
3051 s->value = ent - s->section->vma;
3052 s->name = names;
3053 *names++ = '.';
3054 len = strlen (syms[i]->name);
3055 memcpy (names, syms[i]->name, len + 1);
3056 names += len + 1;
3057 /* Have udata.p point back to the original symbol this
3058 synthetic symbol was derived from. */
3059 s->udata.p = syms[i];
3060 s++;
3061 }
3062 }
3063 free (contents);
3064 }
3065
3066 done:
3067 free (syms);
3068 return count;
3069 }
3070 \f
3071 /* The following functions are specific to the ELF linker, while
3072 functions above are used generally. Those named ppc64_elf_* are
3073 called by the main ELF linker code. They appear in this file more
3074 or less in the order in which they are called. eg.
3075 ppc64_elf_check_relocs is called early in the link process,
3076 ppc64_elf_finish_dynamic_sections is one of the last functions
3077 called.
3078
3079 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3080 functions have both a function code symbol and a function descriptor
3081 symbol. A call to foo in a relocatable object file looks like:
3082
3083 . .text
3084 . x:
3085 . bl .foo
3086 . nop
3087
3088 The function definition in another object file might be:
3089
3090 . .section .opd
3091 . foo: .quad .foo
3092 . .quad .TOC.@tocbase
3093 . .quad 0
3094 .
3095 . .text
3096 . .foo: blr
3097
3098 When the linker resolves the call during a static link, the branch
3099 unsurprisingly just goes to .foo and the .opd information is unused.
3100 If the function definition is in a shared library, things are a little
3101 different: The call goes via a plt call stub, the opd information gets
3102 copied to the plt, and the linker patches the nop.
3103
3104 . x:
3105 . bl .foo_stub
3106 . ld 2,40(1)
3107 .
3108 .
3109 . .foo_stub:
3110 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3111 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3112 . std 2,40(1) # this is the general idea
3113 . ld 11,0(12)
3114 . ld 2,8(12)
3115 . mtctr 11
3116 . ld 11,16(12)
3117 . bctr
3118 .
3119 . .section .plt
3120 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3121
3122 The "reloc ()" notation is supposed to indicate that the linker emits
3123 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3124 copying.
3125
3126 What are the difficulties here? Well, firstly, the relocations
3127 examined by the linker in check_relocs are against the function code
3128 sym .foo, while the dynamic relocation in the plt is emitted against
3129 the function descriptor symbol, foo. Somewhere along the line, we need
3130 to carefully copy dynamic link information from one symbol to the other.
3131 Secondly, the generic part of the elf linker will make .foo a dynamic
3132 symbol as is normal for most other backends. We need foo dynamic
3133 instead, at least for an application final link. However, when
3134 creating a shared library containing foo, we need to have both symbols
3135 dynamic so that references to .foo are satisfied during the early
3136 stages of linking. Otherwise the linker might decide to pull in a
3137 definition from some other object, eg. a static library.
3138
3139 Update: As of August 2004, we support a new convention. Function
3140 calls may use the function descriptor symbol, ie. "bl foo". This
3141 behaves exactly as "bl .foo". */
3142
3143 /* The linker needs to keep track of the number of relocs that it
3144 decides to copy as dynamic relocs in check_relocs for each symbol.
3145 This is so that it can later discard them if they are found to be
3146 unnecessary. We store the information in a field extending the
3147 regular ELF linker hash table. */
3148
3149 struct ppc_dyn_relocs
3150 {
3151 struct ppc_dyn_relocs *next;
3152
3153 /* The input section of the reloc. */
3154 asection *sec;
3155
3156 /* Total number of relocs copied for the input section. */
3157 bfd_size_type count;
3158
3159 /* Number of pc-relative relocs copied for the input section. */
3160 bfd_size_type pc_count;
3161 };
3162
3163 /* Track GOT entries needed for a given symbol. We might need more
3164 than one got entry per symbol. */
3165 struct got_entry
3166 {
3167 struct got_entry *next;
3168
3169 /* The symbol addend that we'll be placing in the GOT. */
3170 bfd_vma addend;
3171
3172 /* Unlike other ELF targets, we use separate GOT entries for the same
3173 symbol referenced from different input files. This is to support
3174 automatic multiple TOC/GOT sections, where the TOC base can vary
3175 from one input file to another. FIXME: After group_sections we
3176 ought to merge entries within the group.
3177
3178 Point to the BFD owning this GOT entry. */
3179 bfd *owner;
3180
3181 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3182 TLS_TPREL or TLS_DTPREL for tls entries. */
3183 char tls_type;
3184
3185 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3186 union
3187 {
3188 bfd_signed_vma refcount;
3189 bfd_vma offset;
3190 } got;
3191 };
3192
3193 /* The same for PLT. */
3194 struct plt_entry
3195 {
3196 struct plt_entry *next;
3197
3198 bfd_vma addend;
3199
3200 union
3201 {
3202 bfd_signed_vma refcount;
3203 bfd_vma offset;
3204 } plt;
3205 };
3206
3207 /* Of those relocs that might be copied as dynamic relocs, this macro
3208 selects those that must be copied when linking a shared library,
3209 even when the symbol is local. */
3210
3211 #define MUST_BE_DYN_RELOC(RTYPE) \
3212 ((RTYPE) != R_PPC64_REL32 \
3213 && (RTYPE) != R_PPC64_REL64 \
3214 && (RTYPE) != R_PPC64_REL30)
3215
3216 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3217 copying dynamic variables from a shared lib into an app's dynbss
3218 section, and instead use a dynamic relocation to point into the
3219 shared lib. With code that gcc generates, it's vital that this be
3220 enabled; In the PowerPC64 ABI, the address of a function is actually
3221 the address of a function descriptor, which resides in the .opd
3222 section. gcc uses the descriptor directly rather than going via the
3223 GOT as some other ABI's do, which means that initialized function
3224 pointers must reference the descriptor. Thus, a function pointer
3225 initialized to the address of a function in a shared library will
3226 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3227 redefines the function descriptor symbol to point to the copy. This
3228 presents a problem as a plt entry for that function is also
3229 initialized from the function descriptor symbol and the copy reloc
3230 may not be initialized first. */
3231 #define ELIMINATE_COPY_RELOCS 1
3232
3233 /* Section name for stubs is the associated section name plus this
3234 string. */
3235 #define STUB_SUFFIX ".stub"
3236
3237 /* Linker stubs.
3238 ppc_stub_long_branch:
3239 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3240 destination, but a 24 bit branch in a stub section will reach.
3241 . b dest
3242
3243 ppc_stub_plt_branch:
3244 Similar to the above, but a 24 bit branch in the stub section won't
3245 reach its destination.
3246 . addis %r12,%r2,xxx@toc@ha
3247 . ld %r11,xxx@toc@l(%r12)
3248 . mtctr %r11
3249 . bctr
3250
3251 ppc_stub_plt_call:
3252 Used to call a function in a shared library. If it so happens that
3253 the plt entry referenced crosses a 64k boundary, then an extra
3254 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3255 . addis %r12,%r2,xxx@toc@ha
3256 . std %r2,40(%r1)
3257 . ld %r11,xxx+0@toc@l(%r12)
3258 . mtctr %r11
3259 . ld %r2,xxx+8@toc@l(%r12)
3260 . ld %r11,xxx+16@toc@l(%r12)
3261 . bctr
3262
3263 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3264 code to adjust the value and save r2 to support multiple toc sections.
3265 A ppc_stub_long_branch with an r2 offset looks like:
3266 . std %r2,40(%r1)
3267 . addis %r2,%r2,off@ha
3268 . addi %r2,%r2,off@l
3269 . b dest
3270
3271 A ppc_stub_plt_branch with an r2 offset looks like:
3272 . std %r2,40(%r1)
3273 . addis %r12,%r2,xxx@toc@ha
3274 . ld %r11,xxx@toc@l(%r12)
3275 . addis %r2,%r2,off@ha
3276 . addi %r2,%r2,off@l
3277 . mtctr %r11
3278 . bctr
3279
3280 In cases where the "addis" instruction would add zero, the "addis" is
3281 omitted and following instructions modified slightly in some cases.
3282 */
3283
3284 enum ppc_stub_type {
3285 ppc_stub_none,
3286 ppc_stub_long_branch,
3287 ppc_stub_long_branch_r2off,
3288 ppc_stub_plt_branch,
3289 ppc_stub_plt_branch_r2off,
3290 ppc_stub_plt_call
3291 };
3292
3293 struct ppc_stub_hash_entry {
3294
3295 /* Base hash table entry structure. */
3296 struct bfd_hash_entry root;
3297
3298 enum ppc_stub_type stub_type;
3299
3300 /* The stub section. */
3301 asection *stub_sec;
3302
3303 /* Offset within stub_sec of the beginning of this stub. */
3304 bfd_vma stub_offset;
3305
3306 /* Given the symbol's value and its section we can determine its final
3307 value when building the stubs (so the stub knows where to jump. */
3308 bfd_vma target_value;
3309 asection *target_section;
3310
3311 /* The symbol table entry, if any, that this was derived from. */
3312 struct ppc_link_hash_entry *h;
3313
3314 /* And the reloc addend that this was derived from. */
3315 bfd_vma addend;
3316
3317 /* Where this stub is being called from, or, in the case of combined
3318 stub sections, the first input section in the group. */
3319 asection *id_sec;
3320 };
3321
3322 struct ppc_branch_hash_entry {
3323
3324 /* Base hash table entry structure. */
3325 struct bfd_hash_entry root;
3326
3327 /* Offset within branch lookup table. */
3328 unsigned int offset;
3329
3330 /* Generation marker. */
3331 unsigned int iter;
3332 };
3333
3334 struct ppc_link_hash_entry
3335 {
3336 struct elf_link_hash_entry elf;
3337
3338 union {
3339 /* A pointer to the most recently used stub hash entry against this
3340 symbol. */
3341 struct ppc_stub_hash_entry *stub_cache;
3342
3343 /* A pointer to the next symbol starting with a '.' */
3344 struct ppc_link_hash_entry *next_dot_sym;
3345 } u;
3346
3347 /* Track dynamic relocs copied for this symbol. */
3348 struct ppc_dyn_relocs *dyn_relocs;
3349
3350 /* Link between function code and descriptor symbols. */
3351 struct ppc_link_hash_entry *oh;
3352
3353 /* Flag function code and descriptor symbols. */
3354 unsigned int is_func:1;
3355 unsigned int is_func_descriptor:1;
3356 unsigned int fake:1;
3357
3358 /* Whether global opd/toc sym has been adjusted or not.
3359 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3360 should be set for all globals defined in any opd/toc section. */
3361 unsigned int adjust_done:1;
3362
3363 /* Set if we twiddled this symbol to weak at some stage. */
3364 unsigned int was_undefined:1;
3365
3366 /* Contexts in which symbol is used in the GOT (or TOC).
3367 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3368 corresponding relocs are encountered during check_relocs.
3369 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3370 indicate the corresponding GOT entry type is not needed.
3371 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3372 a TPREL one. We use a separate flag rather than setting TPREL
3373 just for convenience in distinguishing the two cases. */
3374 #define TLS_GD 1 /* GD reloc. */
3375 #define TLS_LD 2 /* LD reloc. */
3376 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3377 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3378 #define TLS_TLS 16 /* Any TLS reloc. */
3379 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3380 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3381 char tls_mask;
3382 };
3383
3384 /* ppc64 ELF linker hash table. */
3385
3386 struct ppc_link_hash_table
3387 {
3388 struct elf_link_hash_table elf;
3389
3390 /* The stub hash table. */
3391 struct bfd_hash_table stub_hash_table;
3392
3393 /* Another hash table for plt_branch stubs. */
3394 struct bfd_hash_table branch_hash_table;
3395
3396 /* Linker stub bfd. */
3397 bfd *stub_bfd;
3398
3399 /* Linker call-backs. */
3400 asection * (*add_stub_section) (const char *, asection *);
3401 void (*layout_sections_again) (void);
3402
3403 /* Array to keep track of which stub sections have been created, and
3404 information on stub grouping. */
3405 struct map_stub {
3406 /* This is the section to which stubs in the group will be attached. */
3407 asection *link_sec;
3408 /* The stub section. */
3409 asection *stub_sec;
3410 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3411 bfd_vma toc_off;
3412 } *stub_group;
3413
3414 /* Temp used when calculating TOC pointers. */
3415 bfd_vma toc_curr;
3416
3417 /* Highest input section id. */
3418 int top_id;
3419
3420 /* Highest output section index. */
3421 int top_index;
3422
3423 /* Used when adding symbols. */
3424 struct ppc_link_hash_entry *dot_syms;
3425
3426 /* List of input sections for each output section. */
3427 asection **input_list;
3428
3429 /* Short-cuts to get to dynamic linker sections. */
3430 asection *got;
3431 asection *plt;
3432 asection *relplt;
3433 asection *dynbss;
3434 asection *relbss;
3435 asection *glink;
3436 asection *sfpr;
3437 asection *brlt;
3438 asection *relbrlt;
3439
3440 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3441 struct ppc_link_hash_entry *tls_get_addr;
3442 struct ppc_link_hash_entry *tls_get_addr_fd;
3443
3444 /* Statistics. */
3445 unsigned long stub_count[ppc_stub_plt_call];
3446
3447 /* Number of stubs against global syms. */
3448 unsigned long stub_globals;
3449
3450 /* Set if we should emit symbols for stubs. */
3451 unsigned int emit_stub_syms:1;
3452
3453 /* Support for multiple toc sections. */
3454 unsigned int no_multi_toc:1;
3455 unsigned int multi_toc_needed:1;
3456
3457 /* Set on error. */
3458 unsigned int stub_error:1;
3459
3460 /* Temp used by ppc64_elf_check_directives. */
3461 unsigned int twiddled_syms:1;
3462
3463 /* Incremented every time we size stubs. */
3464 unsigned int stub_iteration;
3465
3466 /* Small local sym to section mapping cache. */
3467 struct sym_sec_cache sym_sec;
3468 };
3469
3470 /* Rename some of the generic section flags to better document how they
3471 are used here. */
3472 #define has_toc_reloc has_gp_reloc
3473 #define makes_toc_func_call need_finalize_relax
3474 #define call_check_in_progress reloc_done
3475
3476 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3477
3478 #define ppc_hash_table(p) \
3479 ((struct ppc_link_hash_table *) ((p)->hash))
3480
3481 #define ppc_stub_hash_lookup(table, string, create, copy) \
3482 ((struct ppc_stub_hash_entry *) \
3483 bfd_hash_lookup ((table), (string), (create), (copy)))
3484
3485 #define ppc_branch_hash_lookup(table, string, create, copy) \
3486 ((struct ppc_branch_hash_entry *) \
3487 bfd_hash_lookup ((table), (string), (create), (copy)))
3488
3489 /* Create an entry in the stub hash table. */
3490
3491 static struct bfd_hash_entry *
3492 stub_hash_newfunc (struct bfd_hash_entry *entry,
3493 struct bfd_hash_table *table,
3494 const char *string)
3495 {
3496 /* Allocate the structure if it has not already been allocated by a
3497 subclass. */
3498 if (entry == NULL)
3499 {
3500 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3501 if (entry == NULL)
3502 return entry;
3503 }
3504
3505 /* Call the allocation method of the superclass. */
3506 entry = bfd_hash_newfunc (entry, table, string);
3507 if (entry != NULL)
3508 {
3509 struct ppc_stub_hash_entry *eh;
3510
3511 /* Initialize the local fields. */
3512 eh = (struct ppc_stub_hash_entry *) entry;
3513 eh->stub_type = ppc_stub_none;
3514 eh->stub_sec = NULL;
3515 eh->stub_offset = 0;
3516 eh->target_value = 0;
3517 eh->target_section = NULL;
3518 eh->h = NULL;
3519 eh->id_sec = NULL;
3520 }
3521
3522 return entry;
3523 }
3524
3525 /* Create an entry in the branch hash table. */
3526
3527 static struct bfd_hash_entry *
3528 branch_hash_newfunc (struct bfd_hash_entry *entry,
3529 struct bfd_hash_table *table,
3530 const char *string)
3531 {
3532 /* Allocate the structure if it has not already been allocated by a
3533 subclass. */
3534 if (entry == NULL)
3535 {
3536 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3537 if (entry == NULL)
3538 return entry;
3539 }
3540
3541 /* Call the allocation method of the superclass. */
3542 entry = bfd_hash_newfunc (entry, table, string);
3543 if (entry != NULL)
3544 {
3545 struct ppc_branch_hash_entry *eh;
3546
3547 /* Initialize the local fields. */
3548 eh = (struct ppc_branch_hash_entry *) entry;
3549 eh->offset = 0;
3550 eh->iter = 0;
3551 }
3552
3553 return entry;
3554 }
3555
3556 /* Create an entry in a ppc64 ELF linker hash table. */
3557
3558 static struct bfd_hash_entry *
3559 link_hash_newfunc (struct bfd_hash_entry *entry,
3560 struct bfd_hash_table *table,
3561 const char *string)
3562 {
3563 /* Allocate the structure if it has not already been allocated by a
3564 subclass. */
3565 if (entry == NULL)
3566 {
3567 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3568 if (entry == NULL)
3569 return entry;
3570 }
3571
3572 /* Call the allocation method of the superclass. */
3573 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3574 if (entry != NULL)
3575 {
3576 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3577
3578 memset (&eh->u.stub_cache, 0,
3579 (sizeof (struct ppc_link_hash_entry)
3580 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3581
3582 /* When making function calls, old ABI code references function entry
3583 points (dot symbols), while new ABI code references the function
3584 descriptor symbol. We need to make any combination of reference and
3585 definition work together, without breaking archive linking.
3586
3587 For a defined function "foo" and an undefined call to "bar":
3588 An old object defines "foo" and ".foo", references ".bar" (possibly
3589 "bar" too).
3590 A new object defines "foo" and references "bar".
3591
3592 A new object thus has no problem with its undefined symbols being
3593 satisfied by definitions in an old object. On the other hand, the
3594 old object won't have ".bar" satisfied by a new object.
3595
3596 Keep a list of newly added dot-symbols. */
3597
3598 if (string[0] == '.')
3599 {
3600 struct ppc_link_hash_table *htab;
3601
3602 htab = (struct ppc_link_hash_table *) table;
3603 eh->u.next_dot_sym = htab->dot_syms;
3604 htab->dot_syms = eh;
3605 }
3606 }
3607
3608 return entry;
3609 }
3610
3611 /* Create a ppc64 ELF linker hash table. */
3612
3613 static struct bfd_link_hash_table *
3614 ppc64_elf_link_hash_table_create (bfd *abfd)
3615 {
3616 struct ppc_link_hash_table *htab;
3617 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3618
3619 htab = bfd_zmalloc (amt);
3620 if (htab == NULL)
3621 return NULL;
3622
3623 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3624 sizeof (struct ppc_link_hash_entry)))
3625 {
3626 free (htab);
3627 return NULL;
3628 }
3629
3630 /* Init the stub hash table too. */
3631 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3632 sizeof (struct ppc_stub_hash_entry)))
3633 return NULL;
3634
3635 /* And the branch hash table. */
3636 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3637 sizeof (struct ppc_branch_hash_entry)))
3638 return NULL;
3639
3640 /* Initializing two fields of the union is just cosmetic. We really
3641 only care about glist, but when compiled on a 32-bit host the
3642 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3643 debugger inspection of these fields look nicer. */
3644 htab->elf.init_got_refcount.refcount = 0;
3645 htab->elf.init_got_refcount.glist = NULL;
3646 htab->elf.init_plt_refcount.refcount = 0;
3647 htab->elf.init_plt_refcount.glist = NULL;
3648 htab->elf.init_got_offset.offset = 0;
3649 htab->elf.init_got_offset.glist = NULL;
3650 htab->elf.init_plt_offset.offset = 0;
3651 htab->elf.init_plt_offset.glist = NULL;
3652
3653 return &htab->elf.root;
3654 }
3655
3656 /* Free the derived linker hash table. */
3657
3658 static void
3659 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3660 {
3661 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3662
3663 bfd_hash_table_free (&ret->stub_hash_table);
3664 bfd_hash_table_free (&ret->branch_hash_table);
3665 _bfd_generic_link_hash_table_free (hash);
3666 }
3667
3668 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3669
3670 void
3671 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3672 {
3673 struct ppc_link_hash_table *htab;
3674
3675 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3676
3677 /* Always hook our dynamic sections into the first bfd, which is the
3678 linker created stub bfd. This ensures that the GOT header is at
3679 the start of the output TOC section. */
3680 htab = ppc_hash_table (info);
3681 htab->stub_bfd = abfd;
3682 htab->elf.dynobj = abfd;
3683 }
3684
3685 /* Build a name for an entry in the stub hash table. */
3686
3687 static char *
3688 ppc_stub_name (const asection *input_section,
3689 const asection *sym_sec,
3690 const struct ppc_link_hash_entry *h,
3691 const Elf_Internal_Rela *rel)
3692 {
3693 char *stub_name;
3694 bfd_size_type len;
3695
3696 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3697 offsets from a sym as a branch target? In fact, we could
3698 probably assume the addend is always zero. */
3699 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3700
3701 if (h)
3702 {
3703 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3704 stub_name = bfd_malloc (len);
3705 if (stub_name == NULL)
3706 return stub_name;
3707
3708 sprintf (stub_name, "%08x.%s+%x",
3709 input_section->id & 0xffffffff,
3710 h->elf.root.root.string,
3711 (int) rel->r_addend & 0xffffffff);
3712 }
3713 else
3714 {
3715 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3716 stub_name = bfd_malloc (len);
3717 if (stub_name == NULL)
3718 return stub_name;
3719
3720 sprintf (stub_name, "%08x.%x:%x+%x",
3721 input_section->id & 0xffffffff,
3722 sym_sec->id & 0xffffffff,
3723 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3724 (int) rel->r_addend & 0xffffffff);
3725 }
3726 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3727 stub_name[len - 2] = 0;
3728 return stub_name;
3729 }
3730
3731 /* Look up an entry in the stub hash. Stub entries are cached because
3732 creating the stub name takes a bit of time. */
3733
3734 static struct ppc_stub_hash_entry *
3735 ppc_get_stub_entry (const asection *input_section,
3736 const asection *sym_sec,
3737 struct ppc_link_hash_entry *h,
3738 const Elf_Internal_Rela *rel,
3739 struct ppc_link_hash_table *htab)
3740 {
3741 struct ppc_stub_hash_entry *stub_entry;
3742 const asection *id_sec;
3743
3744 /* If this input section is part of a group of sections sharing one
3745 stub section, then use the id of the first section in the group.
3746 Stub names need to include a section id, as there may well be
3747 more than one stub used to reach say, printf, and we need to
3748 distinguish between them. */
3749 id_sec = htab->stub_group[input_section->id].link_sec;
3750
3751 if (h != NULL && h->u.stub_cache != NULL
3752 && h->u.stub_cache->h == h
3753 && h->u.stub_cache->id_sec == id_sec)
3754 {
3755 stub_entry = h->u.stub_cache;
3756 }
3757 else
3758 {
3759 char *stub_name;
3760
3761 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3762 if (stub_name == NULL)
3763 return NULL;
3764
3765 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3766 stub_name, FALSE, FALSE);
3767 if (h != NULL)
3768 h->u.stub_cache = stub_entry;
3769
3770 free (stub_name);
3771 }
3772
3773 return stub_entry;
3774 }
3775
3776 /* Add a new stub entry to the stub hash. Not all fields of the new
3777 stub entry are initialised. */
3778
3779 static struct ppc_stub_hash_entry *
3780 ppc_add_stub (const char *stub_name,
3781 asection *section,
3782 struct ppc_link_hash_table *htab)
3783 {
3784 asection *link_sec;
3785 asection *stub_sec;
3786 struct ppc_stub_hash_entry *stub_entry;
3787
3788 link_sec = htab->stub_group[section->id].link_sec;
3789 stub_sec = htab->stub_group[section->id].stub_sec;
3790 if (stub_sec == NULL)
3791 {
3792 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3793 if (stub_sec == NULL)
3794 {
3795 size_t namelen;
3796 bfd_size_type len;
3797 char *s_name;
3798
3799 namelen = strlen (link_sec->name);
3800 len = namelen + sizeof (STUB_SUFFIX);
3801 s_name = bfd_alloc (htab->stub_bfd, len);
3802 if (s_name == NULL)
3803 return NULL;
3804
3805 memcpy (s_name, link_sec->name, namelen);
3806 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3807 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3808 if (stub_sec == NULL)
3809 return NULL;
3810 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3811 }
3812 htab->stub_group[section->id].stub_sec = stub_sec;
3813 }
3814
3815 /* Enter this entry into the linker stub hash table. */
3816 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3817 TRUE, FALSE);
3818 if (stub_entry == NULL)
3819 {
3820 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3821 section->owner, stub_name);
3822 return NULL;
3823 }
3824
3825 stub_entry->stub_sec = stub_sec;
3826 stub_entry->stub_offset = 0;
3827 stub_entry->id_sec = link_sec;
3828 return stub_entry;
3829 }
3830
3831 /* Create sections for linker generated code. */
3832
3833 static bfd_boolean
3834 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3835 {
3836 struct ppc_link_hash_table *htab;
3837 flagword flags;
3838
3839 htab = ppc_hash_table (info);
3840
3841 /* Create .sfpr for code to save and restore fp regs. */
3842 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3843 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3844 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3845 flags);
3846 if (htab->sfpr == NULL
3847 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3848 return FALSE;
3849
3850 /* Create .glink for lazy dynamic linking support. */
3851 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3852 flags);
3853 if (htab->glink == NULL
3854 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3855 return FALSE;
3856
3857 /* Create branch lookup table for plt_branch stubs. */
3858 flags = (SEC_ALLOC | SEC_LOAD
3859 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3860 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3861 flags);
3862 if (htab->brlt == NULL
3863 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3864 return FALSE;
3865
3866 if (!info->shared)
3867 return TRUE;
3868
3869 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3870 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3871 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3872 ".rela.branch_lt",
3873 flags);
3874 if (!htab->relbrlt
3875 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3876 return FALSE;
3877
3878 return TRUE;
3879 }
3880
3881 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3882 not already done. */
3883
3884 static bfd_boolean
3885 create_got_section (bfd *abfd, struct bfd_link_info *info)
3886 {
3887 asection *got, *relgot;
3888 flagword flags;
3889 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3890
3891 if (!htab->got)
3892 {
3893 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3894 return FALSE;
3895
3896 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3897 if (!htab->got)
3898 abort ();
3899 }
3900
3901 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3902 | SEC_LINKER_CREATED);
3903
3904 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3905 if (!got
3906 || !bfd_set_section_alignment (abfd, got, 3))
3907 return FALSE;
3908
3909 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3910 flags | SEC_READONLY);
3911 if (!relgot
3912 || ! bfd_set_section_alignment (abfd, relgot, 3))
3913 return FALSE;
3914
3915 ppc64_elf_tdata (abfd)->got = got;
3916 ppc64_elf_tdata (abfd)->relgot = relgot;
3917 return TRUE;
3918 }
3919
3920 /* Create the dynamic sections, and set up shortcuts. */
3921
3922 static bfd_boolean
3923 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3924 {
3925 struct ppc_link_hash_table *htab;
3926
3927 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3928 return FALSE;
3929
3930 htab = ppc_hash_table (info);
3931 if (!htab->got)
3932 htab->got = bfd_get_section_by_name (dynobj, ".got");
3933 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3934 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3935 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3936 if (!info->shared)
3937 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3938
3939 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3940 || (!info->shared && !htab->relbss))
3941 abort ();
3942
3943 return TRUE;
3944 }
3945
3946 /* Merge PLT info on FROM with that on TO. */
3947
3948 static void
3949 move_plt_plist (struct ppc_link_hash_entry *from,
3950 struct ppc_link_hash_entry *to)
3951 {
3952 if (from->elf.plt.plist != NULL)
3953 {
3954 if (to->elf.plt.plist != NULL)
3955 {
3956 struct plt_entry **entp;
3957 struct plt_entry *ent;
3958
3959 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3960 {
3961 struct plt_entry *dent;
3962
3963 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3964 if (dent->addend == ent->addend)
3965 {
3966 dent->plt.refcount += ent->plt.refcount;
3967 *entp = ent->next;
3968 break;
3969 }
3970 if (dent == NULL)
3971 entp = &ent->next;
3972 }
3973 *entp = to->elf.plt.plist;
3974 }
3975
3976 to->elf.plt.plist = from->elf.plt.plist;
3977 from->elf.plt.plist = NULL;
3978 }
3979 }
3980
3981 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3982
3983 static void
3984 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3985 struct elf_link_hash_entry *dir,
3986 struct elf_link_hash_entry *ind)
3987 {
3988 struct ppc_link_hash_entry *edir, *eind;
3989
3990 edir = (struct ppc_link_hash_entry *) dir;
3991 eind = (struct ppc_link_hash_entry *) ind;
3992
3993 /* Copy over any dynamic relocs we may have on the indirect sym. */
3994 if (eind->dyn_relocs != NULL)
3995 {
3996 if (edir->dyn_relocs != NULL)
3997 {
3998 struct ppc_dyn_relocs **pp;
3999 struct ppc_dyn_relocs *p;
4000
4001 /* Add reloc counts against the indirect sym to the direct sym
4002 list. Merge any entries against the same section. */
4003 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4004 {
4005 struct ppc_dyn_relocs *q;
4006
4007 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4008 if (q->sec == p->sec)
4009 {
4010 q->pc_count += p->pc_count;
4011 q->count += p->count;
4012 *pp = p->next;
4013 break;
4014 }
4015 if (q == NULL)
4016 pp = &p->next;
4017 }
4018 *pp = edir->dyn_relocs;
4019 }
4020
4021 edir->dyn_relocs = eind->dyn_relocs;
4022 eind->dyn_relocs = NULL;
4023 }
4024
4025 edir->is_func |= eind->is_func;
4026 edir->is_func_descriptor |= eind->is_func_descriptor;
4027 edir->tls_mask |= eind->tls_mask;
4028
4029 /* If called to transfer flags for a weakdef during processing
4030 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4031 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4032 if (!(ELIMINATE_COPY_RELOCS
4033 && eind->elf.root.type != bfd_link_hash_indirect
4034 && edir->elf.dynamic_adjusted))
4035 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4036
4037 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4038 edir->elf.ref_regular |= eind->elf.ref_regular;
4039 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4040 edir->elf.needs_plt |= eind->elf.needs_plt;
4041
4042 /* If we were called to copy over info for a weak sym, that's all. */
4043 if (eind->elf.root.type != bfd_link_hash_indirect)
4044 return;
4045
4046 /* Copy over got entries that we may have already seen to the
4047 symbol which just became indirect. */
4048 if (eind->elf.got.glist != NULL)
4049 {
4050 if (edir->elf.got.glist != NULL)
4051 {
4052 struct got_entry **entp;
4053 struct got_entry *ent;
4054
4055 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4056 {
4057 struct got_entry *dent;
4058
4059 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4060 if (dent->addend == ent->addend
4061 && dent->owner == ent->owner
4062 && dent->tls_type == ent->tls_type)
4063 {
4064 dent->got.refcount += ent->got.refcount;
4065 *entp = ent->next;
4066 break;
4067 }
4068 if (dent == NULL)
4069 entp = &ent->next;
4070 }
4071 *entp = edir->elf.got.glist;
4072 }
4073
4074 edir->elf.got.glist = eind->elf.got.glist;
4075 eind->elf.got.glist = NULL;
4076 }
4077
4078 /* And plt entries. */
4079 move_plt_plist (eind, edir);
4080
4081 if (eind->elf.dynindx != -1)
4082 {
4083 if (edir->elf.dynindx != -1)
4084 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4085 edir->elf.dynstr_index);
4086 edir->elf.dynindx = eind->elf.dynindx;
4087 edir->elf.dynstr_index = eind->elf.dynstr_index;
4088 eind->elf.dynindx = -1;
4089 eind->elf.dynstr_index = 0;
4090 }
4091 }
4092
4093 /* Find the function descriptor hash entry from the given function code
4094 hash entry FH. Link the entries via their OH fields. */
4095
4096 static struct ppc_link_hash_entry *
4097 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4098 {
4099 struct ppc_link_hash_entry *fdh = fh->oh;
4100
4101 if (fdh == NULL)
4102 {
4103 const char *fd_name = fh->elf.root.root.string + 1;
4104
4105 fdh = (struct ppc_link_hash_entry *)
4106 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4107 if (fdh != NULL)
4108 {
4109 fdh->is_func_descriptor = 1;
4110 fdh->oh = fh;
4111 fh->is_func = 1;
4112 fh->oh = fdh;
4113 }
4114 }
4115
4116 return fdh;
4117 }
4118
4119 /* Make a fake function descriptor sym for the code sym FH. */
4120
4121 static struct ppc_link_hash_entry *
4122 make_fdh (struct bfd_link_info *info,
4123 struct ppc_link_hash_entry *fh)
4124 {
4125 bfd *abfd;
4126 asymbol *newsym;
4127 struct bfd_link_hash_entry *bh;
4128 struct ppc_link_hash_entry *fdh;
4129
4130 abfd = fh->elf.root.u.undef.abfd;
4131 newsym = bfd_make_empty_symbol (abfd);
4132 newsym->name = fh->elf.root.root.string + 1;
4133 newsym->section = bfd_und_section_ptr;
4134 newsym->value = 0;
4135 newsym->flags = BSF_WEAK;
4136
4137 bh = NULL;
4138 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4139 newsym->flags, newsym->section,
4140 newsym->value, NULL, FALSE, FALSE,
4141 &bh))
4142 return NULL;
4143
4144 fdh = (struct ppc_link_hash_entry *) bh;
4145 fdh->elf.non_elf = 0;
4146 fdh->fake = 1;
4147 fdh->is_func_descriptor = 1;
4148 fdh->oh = fh;
4149 fh->is_func = 1;
4150 fh->oh = fdh;
4151 return fdh;
4152 }
4153
4154 /* Fix function descriptor symbols defined in .opd sections to be
4155 function type. */
4156
4157 static bfd_boolean
4158 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4159 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4160 Elf_Internal_Sym *isym,
4161 const char **name ATTRIBUTE_UNUSED,
4162 flagword *flags ATTRIBUTE_UNUSED,
4163 asection **sec,
4164 bfd_vma *value ATTRIBUTE_UNUSED)
4165 {
4166 if (*sec != NULL
4167 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4168 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4169
4170 return TRUE;
4171 }
4172
4173 /* This function makes an old ABI object reference to ".bar" cause the
4174 inclusion of a new ABI object archive that defines "bar".
4175 NAME is a symbol defined in an archive. Return a symbol in the hash
4176 table that might be satisfied by the archive symbols. */
4177
4178 static struct elf_link_hash_entry *
4179 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4180 struct bfd_link_info *info,
4181 const char *name)
4182 {
4183 struct elf_link_hash_entry *h;
4184 char *dot_name;
4185 size_t len;
4186
4187 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4188 if (h != NULL
4189 /* Don't return this sym if it is a fake function descriptor
4190 created by add_symbol_adjust. */
4191 && !(h->root.type == bfd_link_hash_undefweak
4192 && ((struct ppc_link_hash_entry *) h)->fake))
4193 return h;
4194
4195 if (name[0] == '.')
4196 return h;
4197
4198 len = strlen (name);
4199 dot_name = bfd_alloc (abfd, len + 2);
4200 if (dot_name == NULL)
4201 return (struct elf_link_hash_entry *) 0 - 1;
4202 dot_name[0] = '.';
4203 memcpy (dot_name + 1, name, len + 1);
4204 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4205 bfd_release (abfd, dot_name);
4206 return h;
4207 }
4208
4209 /* This function satisfies all old ABI object references to ".bar" if a
4210 new ABI object defines "bar". Well, at least, undefined dot symbols
4211 are made weak. This stops later archive searches from including an
4212 object if we already have a function descriptor definition. It also
4213 prevents the linker complaining about undefined symbols.
4214 We also check and correct mismatched symbol visibility here. The
4215 most restrictive visibility of the function descriptor and the
4216 function entry symbol is used. */
4217
4218 static bfd_boolean
4219 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4220 {
4221 struct ppc_link_hash_table *htab;
4222 struct ppc_link_hash_entry *fdh;
4223
4224 if (eh->elf.root.type == bfd_link_hash_indirect)
4225 return TRUE;
4226
4227 if (eh->elf.root.type == bfd_link_hash_warning)
4228 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4229
4230 if (eh->elf.root.root.string[0] != '.')
4231 abort ();
4232
4233 htab = ppc_hash_table (info);
4234 fdh = get_fdh (eh, htab);
4235 if (fdh == NULL
4236 && !info->relocatable
4237 && (eh->elf.root.type == bfd_link_hash_undefined
4238 || eh->elf.root.type == bfd_link_hash_undefweak)
4239 && eh->elf.ref_regular)
4240 {
4241 /* Make an undefweak function descriptor sym, which is enough to
4242 pull in an --as-needed shared lib, but won't cause link
4243 errors. Archives are handled elsewhere. */
4244 fdh = make_fdh (info, eh);
4245 if (fdh == NULL)
4246 return FALSE;
4247 else
4248 fdh->elf.ref_regular = 1;
4249 }
4250 else if (fdh != NULL)
4251 {
4252 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4253 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4254 if (entry_vis < descr_vis)
4255 fdh->elf.other += entry_vis - descr_vis;
4256 else if (entry_vis > descr_vis)
4257 eh->elf.other += descr_vis - entry_vis;
4258
4259 if ((fdh->elf.root.type == bfd_link_hash_defined
4260 || fdh->elf.root.type == bfd_link_hash_defweak)
4261 && eh->elf.root.type == bfd_link_hash_undefined)
4262 {
4263 eh->elf.root.type = bfd_link_hash_undefweak;
4264 eh->was_undefined = 1;
4265 htab->twiddled_syms = 1;
4266 }
4267 }
4268
4269 return TRUE;
4270 }
4271
4272 /* Process list of dot-symbols we made in link_hash_newfunc. */
4273
4274 static bfd_boolean
4275 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4276 {
4277 struct ppc_link_hash_table *htab;
4278 struct ppc_link_hash_entry **p, *eh;
4279
4280 htab = ppc_hash_table (info);
4281 if (!is_ppc64_elf_target (htab->elf.root.creator))
4282 return TRUE;
4283
4284 if (is_ppc64_elf_target (ibfd->xvec))
4285 {
4286 p = &htab->dot_syms;
4287 while ((eh = *p) != NULL)
4288 {
4289 *p = NULL;
4290 if (!add_symbol_adjust (eh, info))
4291 return FALSE;
4292 p = &eh->u.next_dot_sym;
4293 }
4294 }
4295
4296 /* Clear the list for non-ppc64 input files. */
4297 p = &htab->dot_syms;
4298 while ((eh = *p) != NULL)
4299 {
4300 *p = NULL;
4301 p = &eh->u.next_dot_sym;
4302 }
4303
4304 /* We need to fix the undefs list for any syms we have twiddled to
4305 undef_weak. */
4306 if (htab->twiddled_syms)
4307 {
4308 bfd_link_repair_undef_list (&htab->elf.root);
4309 htab->twiddled_syms = 0;
4310 }
4311 return TRUE;
4312 }
4313
4314 /* Undo hash table changes when an --as-needed input file is determined
4315 not to be needed. */
4316
4317 static bfd_boolean
4318 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4319 struct bfd_link_info *info)
4320 {
4321 ppc_hash_table (info)->dot_syms = NULL;
4322 return TRUE;
4323 }
4324
4325 static bfd_boolean
4326 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4327 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4328 {
4329 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4330 char *local_got_tls_masks;
4331
4332 if (local_got_ents == NULL)
4333 {
4334 bfd_size_type size = symtab_hdr->sh_info;
4335
4336 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4337 local_got_ents = bfd_zalloc (abfd, size);
4338 if (local_got_ents == NULL)
4339 return FALSE;
4340 elf_local_got_ents (abfd) = local_got_ents;
4341 }
4342
4343 if ((tls_type & TLS_EXPLICIT) == 0)
4344 {
4345 struct got_entry *ent;
4346
4347 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4348 if (ent->addend == r_addend
4349 && ent->owner == abfd
4350 && ent->tls_type == tls_type)
4351 break;
4352 if (ent == NULL)
4353 {
4354 bfd_size_type amt = sizeof (*ent);
4355 ent = bfd_alloc (abfd, amt);
4356 if (ent == NULL)
4357 return FALSE;
4358 ent->next = local_got_ents[r_symndx];
4359 ent->addend = r_addend;
4360 ent->owner = abfd;
4361 ent->tls_type = tls_type;
4362 ent->got.refcount = 0;
4363 local_got_ents[r_symndx] = ent;
4364 }
4365 ent->got.refcount += 1;
4366 }
4367
4368 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4369 local_got_tls_masks[r_symndx] |= tls_type;
4370 return TRUE;
4371 }
4372
4373 static bfd_boolean
4374 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4375 {
4376 struct plt_entry *ent;
4377
4378 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4379 if (ent->addend == addend)
4380 break;
4381 if (ent == NULL)
4382 {
4383 bfd_size_type amt = sizeof (*ent);
4384 ent = bfd_alloc (abfd, amt);
4385 if (ent == NULL)
4386 return FALSE;
4387 ent->next = eh->elf.plt.plist;
4388 ent->addend = addend;
4389 ent->plt.refcount = 0;
4390 eh->elf.plt.plist = ent;
4391 }
4392 ent->plt.refcount += 1;
4393 eh->elf.needs_plt = 1;
4394 if (eh->elf.root.root.string[0] == '.'
4395 && eh->elf.root.root.string[1] != '\0')
4396 eh->is_func = 1;
4397 return TRUE;
4398 }
4399
4400 /* Look through the relocs for a section during the first phase, and
4401 calculate needed space in the global offset table, procedure
4402 linkage table, and dynamic reloc sections. */
4403
4404 static bfd_boolean
4405 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4406 asection *sec, const Elf_Internal_Rela *relocs)
4407 {
4408 struct ppc_link_hash_table *htab;
4409 Elf_Internal_Shdr *symtab_hdr;
4410 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4411 const Elf_Internal_Rela *rel;
4412 const Elf_Internal_Rela *rel_end;
4413 asection *sreloc;
4414 asection **opd_sym_map;
4415
4416 if (info->relocatable)
4417 return TRUE;
4418
4419 /* Don't do anything special with non-loaded, non-alloced sections.
4420 In particular, any relocs in such sections should not affect GOT
4421 and PLT reference counting (ie. we don't allow them to create GOT
4422 or PLT entries), there's no possibility or desire to optimize TLS
4423 relocs, and there's not much point in propagating relocs to shared
4424 libs that the dynamic linker won't relocate. */
4425 if ((sec->flags & SEC_ALLOC) == 0)
4426 return TRUE;
4427
4428 htab = ppc_hash_table (info);
4429 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4430
4431 sym_hashes = elf_sym_hashes (abfd);
4432 sym_hashes_end = (sym_hashes
4433 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4434 - symtab_hdr->sh_info);
4435
4436 sreloc = NULL;
4437 opd_sym_map = NULL;
4438 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4439 {
4440 /* Garbage collection needs some extra help with .opd sections.
4441 We don't want to necessarily keep everything referenced by
4442 relocs in .opd, as that would keep all functions. Instead,
4443 if we reference an .opd symbol (a function descriptor), we
4444 want to keep the function code symbol's section. This is
4445 easy for global symbols, but for local syms we need to keep
4446 information about the associated function section. */
4447 bfd_size_type amt;
4448
4449 amt = sec->size * sizeof (*opd_sym_map) / 8;
4450 opd_sym_map = bfd_zalloc (abfd, amt);
4451 if (opd_sym_map == NULL)
4452 return FALSE;
4453 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4454 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4455 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4456 }
4457
4458 if (htab->sfpr == NULL
4459 && !create_linkage_sections (htab->elf.dynobj, info))
4460 return FALSE;
4461
4462 rel_end = relocs + sec->reloc_count;
4463 for (rel = relocs; rel < rel_end; rel++)
4464 {
4465 unsigned long r_symndx;
4466 struct elf_link_hash_entry *h;
4467 enum elf_ppc64_reloc_type r_type;
4468 int tls_type = 0;
4469 struct _ppc64_elf_section_data *ppc64_sec;
4470
4471 r_symndx = ELF64_R_SYM (rel->r_info);
4472 if (r_symndx < symtab_hdr->sh_info)
4473 h = NULL;
4474 else
4475 {
4476 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4477 while (h->root.type == bfd_link_hash_indirect
4478 || h->root.type == bfd_link_hash_warning)
4479 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4480 }
4481
4482 r_type = ELF64_R_TYPE (rel->r_info);
4483 switch (r_type)
4484 {
4485 case R_PPC64_GOT_TLSLD16:
4486 case R_PPC64_GOT_TLSLD16_LO:
4487 case R_PPC64_GOT_TLSLD16_HI:
4488 case R_PPC64_GOT_TLSLD16_HA:
4489 tls_type = TLS_TLS | TLS_LD;
4490 goto dogottls;
4491
4492 case R_PPC64_GOT_TLSGD16:
4493 case R_PPC64_GOT_TLSGD16_LO:
4494 case R_PPC64_GOT_TLSGD16_HI:
4495 case R_PPC64_GOT_TLSGD16_HA:
4496 tls_type = TLS_TLS | TLS_GD;
4497 goto dogottls;
4498
4499 case R_PPC64_GOT_TPREL16_DS:
4500 case R_PPC64_GOT_TPREL16_LO_DS:
4501 case R_PPC64_GOT_TPREL16_HI:
4502 case R_PPC64_GOT_TPREL16_HA:
4503 if (info->shared)
4504 info->flags |= DF_STATIC_TLS;
4505 tls_type = TLS_TLS | TLS_TPREL;
4506 goto dogottls;
4507
4508 case R_PPC64_GOT_DTPREL16_DS:
4509 case R_PPC64_GOT_DTPREL16_LO_DS:
4510 case R_PPC64_GOT_DTPREL16_HI:
4511 case R_PPC64_GOT_DTPREL16_HA:
4512 tls_type = TLS_TLS | TLS_DTPREL;
4513 dogottls:
4514 sec->has_tls_reloc = 1;
4515 /* Fall thru */
4516
4517 case R_PPC64_GOT16:
4518 case R_PPC64_GOT16_DS:
4519 case R_PPC64_GOT16_HA:
4520 case R_PPC64_GOT16_HI:
4521 case R_PPC64_GOT16_LO:
4522 case R_PPC64_GOT16_LO_DS:
4523 /* This symbol requires a global offset table entry. */
4524 sec->has_toc_reloc = 1;
4525 if (ppc64_elf_tdata (abfd)->got == NULL
4526 && !create_got_section (abfd, info))
4527 return FALSE;
4528
4529 if (h != NULL)
4530 {
4531 struct ppc_link_hash_entry *eh;
4532 struct got_entry *ent;
4533
4534 eh = (struct ppc_link_hash_entry *) h;
4535 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4536 if (ent->addend == rel->r_addend
4537 && ent->owner == abfd
4538 && ent->tls_type == tls_type)
4539 break;
4540 if (ent == NULL)
4541 {
4542 bfd_size_type amt = sizeof (*ent);
4543 ent = bfd_alloc (abfd, amt);
4544 if (ent == NULL)
4545 return FALSE;
4546 ent->next = eh->elf.got.glist;
4547 ent->addend = rel->r_addend;
4548 ent->owner = abfd;
4549 ent->tls_type = tls_type;
4550 ent->got.refcount = 0;
4551 eh->elf.got.glist = ent;
4552 }
4553 ent->got.refcount += 1;
4554 eh->tls_mask |= tls_type;
4555 }
4556 else
4557 /* This is a global offset table entry for a local symbol. */
4558 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4559 rel->r_addend, tls_type))
4560 return FALSE;
4561 break;
4562
4563 case R_PPC64_PLT16_HA:
4564 case R_PPC64_PLT16_HI:
4565 case R_PPC64_PLT16_LO:
4566 case R_PPC64_PLT32:
4567 case R_PPC64_PLT64:
4568 /* This symbol requires a procedure linkage table entry. We
4569 actually build the entry in adjust_dynamic_symbol,
4570 because this might be a case of linking PIC code without
4571 linking in any dynamic objects, in which case we don't
4572 need to generate a procedure linkage table after all. */
4573 if (h == NULL)
4574 {
4575 /* It does not make sense to have a procedure linkage
4576 table entry for a local symbol. */
4577 bfd_set_error (bfd_error_bad_value);
4578 return FALSE;
4579 }
4580 else
4581 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4582 rel->r_addend))
4583 return FALSE;
4584 break;
4585
4586 /* The following relocations don't need to propagate the
4587 relocation if linking a shared object since they are
4588 section relative. */
4589 case R_PPC64_SECTOFF:
4590 case R_PPC64_SECTOFF_LO:
4591 case R_PPC64_SECTOFF_HI:
4592 case R_PPC64_SECTOFF_HA:
4593 case R_PPC64_SECTOFF_DS:
4594 case R_PPC64_SECTOFF_LO_DS:
4595 case R_PPC64_DTPREL16:
4596 case R_PPC64_DTPREL16_LO:
4597 case R_PPC64_DTPREL16_HI:
4598 case R_PPC64_DTPREL16_HA:
4599 case R_PPC64_DTPREL16_DS:
4600 case R_PPC64_DTPREL16_LO_DS:
4601 case R_PPC64_DTPREL16_HIGHER:
4602 case R_PPC64_DTPREL16_HIGHERA:
4603 case R_PPC64_DTPREL16_HIGHEST:
4604 case R_PPC64_DTPREL16_HIGHESTA:
4605 break;
4606
4607 /* Nor do these. */
4608 case R_PPC64_TOC16:
4609 case R_PPC64_TOC16_LO:
4610 case R_PPC64_TOC16_HI:
4611 case R_PPC64_TOC16_HA:
4612 case R_PPC64_TOC16_DS:
4613 case R_PPC64_TOC16_LO_DS:
4614 sec->has_toc_reloc = 1;
4615 break;
4616
4617 /* This relocation describes the C++ object vtable hierarchy.
4618 Reconstruct it for later use during GC. */
4619 case R_PPC64_GNU_VTINHERIT:
4620 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4621 return FALSE;
4622 break;
4623
4624 /* This relocation describes which C++ vtable entries are actually
4625 used. Record for later use during GC. */
4626 case R_PPC64_GNU_VTENTRY:
4627 BFD_ASSERT (h != NULL);
4628 if (h != NULL
4629 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4630 return FALSE;
4631 break;
4632
4633 case R_PPC64_REL14:
4634 case R_PPC64_REL14_BRTAKEN:
4635 case R_PPC64_REL14_BRNTAKEN:
4636 {
4637 asection *dest = NULL;
4638
4639 /* Heuristic: If jumping outside our section, chances are
4640 we are going to need a stub. */
4641 if (h != NULL)
4642 {
4643 /* If the sym is weak it may be overridden later, so
4644 don't assume we know where a weak sym lives. */
4645 if (h->root.type == bfd_link_hash_defined)
4646 dest = h->root.u.def.section;
4647 }
4648 else
4649 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4650 sec, r_symndx);
4651 if (dest != sec)
4652 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4653 }
4654 /* Fall through. */
4655
4656 case R_PPC64_REL24:
4657 if (h != NULL)
4658 {
4659 /* We may need a .plt entry if the function this reloc
4660 refers to is in a shared lib. */
4661 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4662 rel->r_addend))
4663 return FALSE;
4664 if (h == &htab->tls_get_addr->elf
4665 || h == &htab->tls_get_addr_fd->elf)
4666 sec->has_tls_reloc = 1;
4667 else if (htab->tls_get_addr == NULL
4668 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4669 && (h->root.root.string[15] == 0
4670 || h->root.root.string[15] == '@'))
4671 {
4672 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4673 sec->has_tls_reloc = 1;
4674 }
4675 else if (htab->tls_get_addr_fd == NULL
4676 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4677 && (h->root.root.string[14] == 0
4678 || h->root.root.string[14] == '@'))
4679 {
4680 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4681 sec->has_tls_reloc = 1;
4682 }
4683 }
4684 break;
4685
4686 case R_PPC64_TPREL64:
4687 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4688 if (info->shared)
4689 info->flags |= DF_STATIC_TLS;
4690 goto dotlstoc;
4691
4692 case R_PPC64_DTPMOD64:
4693 if (rel + 1 < rel_end
4694 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4695 && rel[1].r_offset == rel->r_offset + 8)
4696 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4697 else
4698 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4699 goto dotlstoc;
4700
4701 case R_PPC64_DTPREL64:
4702 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4703 if (rel != relocs
4704 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4705 && rel[-1].r_offset == rel->r_offset - 8)
4706 /* This is the second reloc of a dtpmod, dtprel pair.
4707 Don't mark with TLS_DTPREL. */
4708 goto dodyn;
4709
4710 dotlstoc:
4711 sec->has_tls_reloc = 1;
4712 if (h != NULL)
4713 {
4714 struct ppc_link_hash_entry *eh;
4715 eh = (struct ppc_link_hash_entry *) h;
4716 eh->tls_mask |= tls_type;
4717 }
4718 else
4719 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4720 rel->r_addend, tls_type))
4721 return FALSE;
4722
4723 ppc64_sec = ppc64_elf_section_data (sec);
4724 if (ppc64_sec->sec_type != sec_toc)
4725 {
4726 /* One extra to simplify get_tls_mask. */
4727 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4728 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4729 if (ppc64_sec->u.t_symndx == NULL)
4730 return FALSE;
4731 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4732 ppc64_sec->sec_type = sec_toc;
4733 }
4734 BFD_ASSERT (rel->r_offset % 8 == 0);
4735 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4736
4737 /* Mark the second slot of a GD or LD entry.
4738 -1 to indicate GD and -2 to indicate LD. */
4739 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4740 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4741 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4742 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4743 goto dodyn;
4744
4745 case R_PPC64_TPREL16:
4746 case R_PPC64_TPREL16_LO:
4747 case R_PPC64_TPREL16_HI:
4748 case R_PPC64_TPREL16_HA:
4749 case R_PPC64_TPREL16_DS:
4750 case R_PPC64_TPREL16_LO_DS:
4751 case R_PPC64_TPREL16_HIGHER:
4752 case R_PPC64_TPREL16_HIGHERA:
4753 case R_PPC64_TPREL16_HIGHEST:
4754 case R_PPC64_TPREL16_HIGHESTA:
4755 if (info->shared)
4756 {
4757 info->flags |= DF_STATIC_TLS;
4758 goto dodyn;
4759 }
4760 break;
4761
4762 case R_PPC64_ADDR64:
4763 if (opd_sym_map != NULL
4764 && rel + 1 < rel_end
4765 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4766 {
4767 if (h != NULL)
4768 {
4769 if (h->root.root.string[0] == '.'
4770 && h->root.root.string[1] != 0
4771 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4772 ;
4773 else
4774 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4775 }
4776 else
4777 {
4778 asection *s;
4779
4780 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4781 r_symndx);
4782 if (s == NULL)
4783 return FALSE;
4784 else if (s != sec)
4785 opd_sym_map[rel->r_offset / 8] = s;
4786 }
4787 }
4788 /* Fall through. */
4789
4790 case R_PPC64_REL30:
4791 case R_PPC64_REL32:
4792 case R_PPC64_REL64:
4793 case R_PPC64_ADDR14:
4794 case R_PPC64_ADDR14_BRNTAKEN:
4795 case R_PPC64_ADDR14_BRTAKEN:
4796 case R_PPC64_ADDR16:
4797 case R_PPC64_ADDR16_DS:
4798 case R_PPC64_ADDR16_HA:
4799 case R_PPC64_ADDR16_HI:
4800 case R_PPC64_ADDR16_HIGHER:
4801 case R_PPC64_ADDR16_HIGHERA:
4802 case R_PPC64_ADDR16_HIGHEST:
4803 case R_PPC64_ADDR16_HIGHESTA:
4804 case R_PPC64_ADDR16_LO:
4805 case R_PPC64_ADDR16_LO_DS:
4806 case R_PPC64_ADDR24:
4807 case R_PPC64_ADDR32:
4808 case R_PPC64_UADDR16:
4809 case R_PPC64_UADDR32:
4810 case R_PPC64_UADDR64:
4811 case R_PPC64_TOC:
4812 if (h != NULL && !info->shared)
4813 /* We may need a copy reloc. */
4814 h->non_got_ref = 1;
4815
4816 /* Don't propagate .opd relocs. */
4817 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4818 break;
4819
4820 /* If we are creating a shared library, and this is a reloc
4821 against a global symbol, or a non PC relative reloc
4822 against a local symbol, then we need to copy the reloc
4823 into the shared library. However, if we are linking with
4824 -Bsymbolic, we do not need to copy a reloc against a
4825 global symbol which is defined in an object we are
4826 including in the link (i.e., DEF_REGULAR is set). At
4827 this point we have not seen all the input files, so it is
4828 possible that DEF_REGULAR is not set now but will be set
4829 later (it is never cleared). In case of a weak definition,
4830 DEF_REGULAR may be cleared later by a strong definition in
4831 a shared library. We account for that possibility below by
4832 storing information in the dyn_relocs field of the hash
4833 table entry. A similar situation occurs when creating
4834 shared libraries and symbol visibility changes render the
4835 symbol local.
4836
4837 If on the other hand, we are creating an executable, we
4838 may need to keep relocations for symbols satisfied by a
4839 dynamic library if we manage to avoid copy relocs for the
4840 symbol. */
4841 dodyn:
4842 if ((info->shared
4843 && (MUST_BE_DYN_RELOC (r_type)
4844 || (h != NULL
4845 && (! info->symbolic
4846 || h->root.type == bfd_link_hash_defweak
4847 || !h->def_regular))))
4848 || (ELIMINATE_COPY_RELOCS
4849 && !info->shared
4850 && h != NULL
4851 && (h->root.type == bfd_link_hash_defweak
4852 || !h->def_regular)))
4853 {
4854 struct ppc_dyn_relocs *p;
4855 struct ppc_dyn_relocs **head;
4856
4857 /* We must copy these reloc types into the output file.
4858 Create a reloc section in dynobj and make room for
4859 this reloc. */
4860 if (sreloc == NULL)
4861 {
4862 const char *name;
4863 bfd *dynobj;
4864
4865 name = (bfd_elf_string_from_elf_section
4866 (abfd,
4867 elf_elfheader (abfd)->e_shstrndx,
4868 elf_section_data (sec)->rel_hdr.sh_name));
4869 if (name == NULL)
4870 return FALSE;
4871
4872 if (! CONST_STRNEQ (name, ".rela")
4873 || strcmp (bfd_get_section_name (abfd, sec),
4874 name + 5) != 0)
4875 {
4876 (*_bfd_error_handler)
4877 (_("%B: bad relocation section name `%s\'"),
4878 abfd, name);
4879 bfd_set_error (bfd_error_bad_value);
4880 }
4881
4882 dynobj = htab->elf.dynobj;
4883 sreloc = bfd_get_section_by_name (dynobj, name);
4884 if (sreloc == NULL)
4885 {
4886 flagword flags;
4887
4888 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4889 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4890 | SEC_ALLOC | SEC_LOAD);
4891 sreloc = bfd_make_section_with_flags (dynobj,
4892 name,
4893 flags);
4894 if (sreloc == NULL
4895 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4896 return FALSE;
4897 }
4898 elf_section_data (sec)->sreloc = sreloc;
4899 }
4900
4901 /* If this is a global symbol, we count the number of
4902 relocations we need for this symbol. */
4903 if (h != NULL)
4904 {
4905 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4906 }
4907 else
4908 {
4909 /* Track dynamic relocs needed for local syms too.
4910 We really need local syms available to do this
4911 easily. Oh well. */
4912
4913 asection *s;
4914 void *vpp;
4915
4916 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4917 sec, r_symndx);
4918 if (s == NULL)
4919 return FALSE;
4920
4921 vpp = &elf_section_data (s)->local_dynrel;
4922 head = (struct ppc_dyn_relocs **) vpp;
4923 }
4924
4925 p = *head;
4926 if (p == NULL || p->sec != sec)
4927 {
4928 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4929 if (p == NULL)
4930 return FALSE;
4931 p->next = *head;
4932 *head = p;
4933 p->sec = sec;
4934 p->count = 0;
4935 p->pc_count = 0;
4936 }
4937
4938 p->count += 1;
4939 if (!MUST_BE_DYN_RELOC (r_type))
4940 p->pc_count += 1;
4941 }
4942 break;
4943
4944 default:
4945 break;
4946 }
4947 }
4948
4949 return TRUE;
4950 }
4951
4952 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4953 of the code entry point, and its section. */
4954
4955 static bfd_vma
4956 opd_entry_value (asection *opd_sec,
4957 bfd_vma offset,
4958 asection **code_sec,
4959 bfd_vma *code_off)
4960 {
4961 bfd *opd_bfd = opd_sec->owner;
4962 Elf_Internal_Rela *relocs;
4963 Elf_Internal_Rela *lo, *hi, *look;
4964 bfd_vma val;
4965
4966 /* No relocs implies we are linking a --just-symbols object. */
4967 if (opd_sec->reloc_count == 0)
4968 {
4969 bfd_vma val;
4970
4971 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4972 return (bfd_vma) -1;
4973
4974 if (code_sec != NULL)
4975 {
4976 asection *sec, *likely = NULL;
4977 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4978 if (sec->vma <= val
4979 && (sec->flags & SEC_LOAD) != 0
4980 && (sec->flags & SEC_ALLOC) != 0)
4981 likely = sec;
4982 if (likely != NULL)
4983 {
4984 *code_sec = likely;
4985 if (code_off != NULL)
4986 *code_off = val - likely->vma;
4987 }
4988 }
4989 return val;
4990 }
4991
4992 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4993 if (relocs == NULL)
4994 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4995
4996 /* Go find the opd reloc at the sym address. */
4997 lo = relocs;
4998 BFD_ASSERT (lo != NULL);
4999 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5000 val = (bfd_vma) -1;
5001 while (lo < hi)
5002 {
5003 look = lo + (hi - lo) / 2;
5004 if (look->r_offset < offset)
5005 lo = look + 1;
5006 else if (look->r_offset > offset)
5007 hi = look;
5008 else
5009 {
5010 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
5011 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5012 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5013 {
5014 unsigned long symndx = ELF64_R_SYM (look->r_info);
5015 asection *sec;
5016
5017 if (symndx < symtab_hdr->sh_info)
5018 {
5019 Elf_Internal_Sym *sym;
5020
5021 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5022 if (sym == NULL)
5023 {
5024 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5025 symtab_hdr->sh_info,
5026 0, NULL, NULL, NULL);
5027 if (sym == NULL)
5028 break;
5029 symtab_hdr->contents = (bfd_byte *) sym;
5030 }
5031
5032 sym += symndx;
5033 val = sym->st_value;
5034 sec = NULL;
5035 if ((sym->st_shndx != SHN_UNDEF
5036 && sym->st_shndx < SHN_LORESERVE)
5037 || sym->st_shndx > SHN_HIRESERVE)
5038 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5039 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5040 }
5041 else
5042 {
5043 struct elf_link_hash_entry **sym_hashes;
5044 struct elf_link_hash_entry *rh;
5045
5046 sym_hashes = elf_sym_hashes (opd_bfd);
5047 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5048 while (rh->root.type == bfd_link_hash_indirect
5049 || rh->root.type == bfd_link_hash_warning)
5050 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5051 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5052 || rh->root.type == bfd_link_hash_defweak);
5053 val = rh->root.u.def.value;
5054 sec = rh->root.u.def.section;
5055 }
5056 val += look->r_addend;
5057 if (code_off != NULL)
5058 *code_off = val;
5059 if (code_sec != NULL)
5060 *code_sec = sec;
5061 if (sec != NULL && sec->output_section != NULL)
5062 val += sec->output_section->vma + sec->output_offset;
5063 }
5064 break;
5065 }
5066 }
5067
5068 return val;
5069 }
5070
5071 /* Mark all our entry sym sections, both opd and code section. */
5072
5073 static void
5074 ppc64_elf_gc_keep (struct bfd_link_info *info)
5075 {
5076 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5077 struct bfd_sym_chain *sym;
5078
5079 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5080 {
5081 struct ppc_link_hash_entry *eh;
5082 asection *sec;
5083
5084 eh = (struct ppc_link_hash_entry *)
5085 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5086 if (eh == NULL)
5087 continue;
5088 if (eh->elf.root.type != bfd_link_hash_defined
5089 && eh->elf.root.type != bfd_link_hash_defweak)
5090 continue;
5091
5092 if (eh->is_func_descriptor
5093 && (eh->oh->elf.root.type == bfd_link_hash_defined
5094 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5095 {
5096 sec = eh->oh->elf.root.u.def.section;
5097 sec->flags |= SEC_KEEP;
5098 }
5099 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5100 && opd_entry_value (eh->elf.root.u.def.section,
5101 eh->elf.root.u.def.value,
5102 &sec, NULL) != (bfd_vma) -1)
5103 sec->flags |= SEC_KEEP;
5104
5105 sec = eh->elf.root.u.def.section;
5106 sec->flags |= SEC_KEEP;
5107 }
5108 }
5109
5110 /* Mark sections containing dynamically referenced symbols. When
5111 building shared libraries, we must assume that any visible symbol is
5112 referenced. */
5113
5114 static bfd_boolean
5115 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5116 {
5117 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5118 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5119
5120 if (eh->elf.root.type == bfd_link_hash_warning)
5121 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5122
5123 /* Dynamic linking info is on the func descriptor sym. */
5124 if (eh->oh != NULL
5125 && eh->oh->is_func_descriptor
5126 && (eh->oh->elf.root.type == bfd_link_hash_defined
5127 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5128 eh = eh->oh;
5129
5130 if ((eh->elf.root.type == bfd_link_hash_defined
5131 || eh->elf.root.type == bfd_link_hash_defweak)
5132 && (eh->elf.ref_dynamic
5133 || (!info->executable
5134 && eh->elf.def_regular
5135 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5136 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5137 {
5138 asection *code_sec;
5139
5140 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5141
5142 /* Function descriptor syms cause the associated
5143 function code sym section to be marked. */
5144 if (eh->is_func_descriptor
5145 && (eh->oh->elf.root.type == bfd_link_hash_defined
5146 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5147 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5148 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5149 && opd_entry_value (eh->elf.root.u.def.section,
5150 eh->elf.root.u.def.value,
5151 &code_sec, NULL) != (bfd_vma) -1)
5152 code_sec->flags |= SEC_KEEP;
5153 }
5154
5155 return TRUE;
5156 }
5157
5158 /* Return the section that should be marked against GC for a given
5159 relocation. */
5160
5161 static asection *
5162 ppc64_elf_gc_mark_hook (asection *sec,
5163 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5164 Elf_Internal_Rela *rel,
5165 struct elf_link_hash_entry *h,
5166 Elf_Internal_Sym *sym)
5167 {
5168 asection *rsec;
5169
5170 /* Syms return NULL if we're marking .opd, so we avoid marking all
5171 function sections, as all functions are referenced in .opd. */
5172 rsec = NULL;
5173 if (get_opd_info (sec) != NULL)
5174 return rsec;
5175
5176 if (h != NULL)
5177 {
5178 enum elf_ppc64_reloc_type r_type;
5179 struct ppc_link_hash_entry *eh;
5180
5181 r_type = ELF64_R_TYPE (rel->r_info);
5182 switch (r_type)
5183 {
5184 case R_PPC64_GNU_VTINHERIT:
5185 case R_PPC64_GNU_VTENTRY:
5186 break;
5187
5188 default:
5189 switch (h->root.type)
5190 {
5191 case bfd_link_hash_defined:
5192 case bfd_link_hash_defweak:
5193 eh = (struct ppc_link_hash_entry *) h;
5194 if (eh->oh != NULL
5195 && eh->oh->is_func_descriptor
5196 && (eh->oh->elf.root.type == bfd_link_hash_defined
5197 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5198 eh = eh->oh;
5199
5200 /* Function descriptor syms cause the associated
5201 function code sym section to be marked. */
5202 if (eh->is_func_descriptor
5203 && (eh->oh->elf.root.type == bfd_link_hash_defined
5204 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5205 {
5206 /* They also mark their opd section. */
5207 eh->elf.root.u.def.section->gc_mark = 1;
5208
5209 rsec = eh->oh->elf.root.u.def.section;
5210 }
5211 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5212 && opd_entry_value (eh->elf.root.u.def.section,
5213 eh->elf.root.u.def.value,
5214 &rsec, NULL) != (bfd_vma) -1)
5215 eh->elf.root.u.def.section->gc_mark = 1;
5216 else
5217 rsec = h->root.u.def.section;
5218 break;
5219
5220 case bfd_link_hash_common:
5221 rsec = h->root.u.c.p->section;
5222 break;
5223
5224 default:
5225 break;
5226 }
5227 }
5228 }
5229 else
5230 {
5231 struct _opd_sec_data *opd;
5232
5233 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5234 opd = get_opd_info (rsec);
5235 if (opd != NULL && opd->func_sec != NULL)
5236 {
5237 rsec->gc_mark = 1;
5238
5239 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5240 }
5241 }
5242
5243 return rsec;
5244 }
5245
5246 /* Update the .got, .plt. and dynamic reloc reference counts for the
5247 section being removed. */
5248
5249 static bfd_boolean
5250 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5251 asection *sec, const Elf_Internal_Rela *relocs)
5252 {
5253 struct ppc_link_hash_table *htab;
5254 Elf_Internal_Shdr *symtab_hdr;
5255 struct elf_link_hash_entry **sym_hashes;
5256 struct got_entry **local_got_ents;
5257 const Elf_Internal_Rela *rel, *relend;
5258
5259 if (info->relocatable)
5260 return TRUE;
5261
5262 if ((sec->flags & SEC_ALLOC) == 0)
5263 return TRUE;
5264
5265 elf_section_data (sec)->local_dynrel = NULL;
5266
5267 htab = ppc_hash_table (info);
5268 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5269 sym_hashes = elf_sym_hashes (abfd);
5270 local_got_ents = elf_local_got_ents (abfd);
5271
5272 relend = relocs + sec->reloc_count;
5273 for (rel = relocs; rel < relend; rel++)
5274 {
5275 unsigned long r_symndx;
5276 enum elf_ppc64_reloc_type r_type;
5277 struct elf_link_hash_entry *h = NULL;
5278 char tls_type = 0;
5279
5280 r_symndx = ELF64_R_SYM (rel->r_info);
5281 r_type = ELF64_R_TYPE (rel->r_info);
5282 if (r_symndx >= symtab_hdr->sh_info)
5283 {
5284 struct ppc_link_hash_entry *eh;
5285 struct ppc_dyn_relocs **pp;
5286 struct ppc_dyn_relocs *p;
5287
5288 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5289 while (h->root.type == bfd_link_hash_indirect
5290 || h->root.type == bfd_link_hash_warning)
5291 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5292 eh = (struct ppc_link_hash_entry *) h;
5293
5294 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5295 if (p->sec == sec)
5296 {
5297 /* Everything must go for SEC. */
5298 *pp = p->next;
5299 break;
5300 }
5301 }
5302
5303 switch (r_type)
5304 {
5305 case R_PPC64_GOT_TLSLD16:
5306 case R_PPC64_GOT_TLSLD16_LO:
5307 case R_PPC64_GOT_TLSLD16_HI:
5308 case R_PPC64_GOT_TLSLD16_HA:
5309 tls_type = TLS_TLS | TLS_LD;
5310 goto dogot;
5311
5312 case R_PPC64_GOT_TLSGD16:
5313 case R_PPC64_GOT_TLSGD16_LO:
5314 case R_PPC64_GOT_TLSGD16_HI:
5315 case R_PPC64_GOT_TLSGD16_HA:
5316 tls_type = TLS_TLS | TLS_GD;
5317 goto dogot;
5318
5319 case R_PPC64_GOT_TPREL16_DS:
5320 case R_PPC64_GOT_TPREL16_LO_DS:
5321 case R_PPC64_GOT_TPREL16_HI:
5322 case R_PPC64_GOT_TPREL16_HA:
5323 tls_type = TLS_TLS | TLS_TPREL;
5324 goto dogot;
5325
5326 case R_PPC64_GOT_DTPREL16_DS:
5327 case R_PPC64_GOT_DTPREL16_LO_DS:
5328 case R_PPC64_GOT_DTPREL16_HI:
5329 case R_PPC64_GOT_DTPREL16_HA:
5330 tls_type = TLS_TLS | TLS_DTPREL;
5331 goto dogot;
5332
5333 case R_PPC64_GOT16:
5334 case R_PPC64_GOT16_DS:
5335 case R_PPC64_GOT16_HA:
5336 case R_PPC64_GOT16_HI:
5337 case R_PPC64_GOT16_LO:
5338 case R_PPC64_GOT16_LO_DS:
5339 dogot:
5340 {
5341 struct got_entry *ent;
5342
5343 if (h != NULL)
5344 ent = h->got.glist;
5345 else
5346 ent = local_got_ents[r_symndx];
5347
5348 for (; ent != NULL; ent = ent->next)
5349 if (ent->addend == rel->r_addend
5350 && ent->owner == abfd
5351 && ent->tls_type == tls_type)
5352 break;
5353 if (ent == NULL)
5354 abort ();
5355 if (ent->got.refcount > 0)
5356 ent->got.refcount -= 1;
5357 }
5358 break;
5359
5360 case R_PPC64_PLT16_HA:
5361 case R_PPC64_PLT16_HI:
5362 case R_PPC64_PLT16_LO:
5363 case R_PPC64_PLT32:
5364 case R_PPC64_PLT64:
5365 case R_PPC64_REL14:
5366 case R_PPC64_REL14_BRNTAKEN:
5367 case R_PPC64_REL14_BRTAKEN:
5368 case R_PPC64_REL24:
5369 if (h != NULL)
5370 {
5371 struct plt_entry *ent;
5372
5373 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5374 if (ent->addend == rel->r_addend)
5375 break;
5376 if (ent == NULL)
5377 abort ();
5378 if (ent->plt.refcount > 0)
5379 ent->plt.refcount -= 1;
5380 }
5381 break;
5382
5383 default:
5384 break;
5385 }
5386 }
5387 return TRUE;
5388 }
5389
5390 /* The maximum size of .sfpr. */
5391 #define SFPR_MAX (218*4)
5392
5393 struct sfpr_def_parms
5394 {
5395 const char name[12];
5396 unsigned char lo, hi;
5397 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5398 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5399 };
5400
5401 /* Auto-generate _save*, _rest* functions in .sfpr. */
5402
5403 static unsigned int
5404 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5405 {
5406 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5407 unsigned int i;
5408 size_t len = strlen (parm->name);
5409 bfd_boolean writing = FALSE;
5410 char sym[16];
5411
5412 memcpy (sym, parm->name, len);
5413 sym[len + 2] = 0;
5414
5415 for (i = parm->lo; i <= parm->hi; i++)
5416 {
5417 struct elf_link_hash_entry *h;
5418
5419 sym[len + 0] = i / 10 + '0';
5420 sym[len + 1] = i % 10 + '0';
5421 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5422 if (h != NULL
5423 && !h->def_regular)
5424 {
5425 h->root.type = bfd_link_hash_defined;
5426 h->root.u.def.section = htab->sfpr;
5427 h->root.u.def.value = htab->sfpr->size;
5428 h->type = STT_FUNC;
5429 h->def_regular = 1;
5430 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5431 writing = TRUE;
5432 if (htab->sfpr->contents == NULL)
5433 {
5434 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5435 if (htab->sfpr->contents == NULL)
5436 return FALSE;
5437 }
5438 }
5439 if (writing)
5440 {
5441 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5442 if (i != parm->hi)
5443 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5444 else
5445 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5446 htab->sfpr->size = p - htab->sfpr->contents;
5447 }
5448 }
5449
5450 return TRUE;
5451 }
5452
5453 static bfd_byte *
5454 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5455 {
5456 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5457 return p + 4;
5458 }
5459
5460 static bfd_byte *
5461 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5462 {
5463 p = savegpr0 (abfd, p, r);
5464 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5465 p = p + 4;
5466 bfd_put_32 (abfd, BLR, p);
5467 return p + 4;
5468 }
5469
5470 static bfd_byte *
5471 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5472 {
5473 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5474 return p + 4;
5475 }
5476
5477 static bfd_byte *
5478 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5479 {
5480 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5481 p = p + 4;
5482 p = restgpr0 (abfd, p, r);
5483 bfd_put_32 (abfd, MTLR_R0, p);
5484 p = p + 4;
5485 if (r == 29)
5486 {
5487 p = restgpr0 (abfd, p, 30);
5488 p = restgpr0 (abfd, p, 31);
5489 }
5490 bfd_put_32 (abfd, BLR, p);
5491 return p + 4;
5492 }
5493
5494 static bfd_byte *
5495 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5496 {
5497 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5498 return p + 4;
5499 }
5500
5501 static bfd_byte *
5502 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5503 {
5504 p = savegpr1 (abfd, p, r);
5505 bfd_put_32 (abfd, BLR, p);
5506 return p + 4;
5507 }
5508
5509 static bfd_byte *
5510 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5511 {
5512 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5513 return p + 4;
5514 }
5515
5516 static bfd_byte *
5517 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5518 {
5519 p = restgpr1 (abfd, p, r);
5520 bfd_put_32 (abfd, BLR, p);
5521 return p + 4;
5522 }
5523
5524 static bfd_byte *
5525 savefpr (bfd *abfd, bfd_byte *p, int r)
5526 {
5527 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5528 return p + 4;
5529 }
5530
5531 static bfd_byte *
5532 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5533 {
5534 p = savefpr (abfd, p, r);
5535 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5536 p = p + 4;
5537 bfd_put_32 (abfd, BLR, p);
5538 return p + 4;
5539 }
5540
5541 static bfd_byte *
5542 restfpr (bfd *abfd, bfd_byte *p, int r)
5543 {
5544 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5545 return p + 4;
5546 }
5547
5548 static bfd_byte *
5549 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5550 {
5551 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5552 p = p + 4;
5553 p = restfpr (abfd, p, r);
5554 bfd_put_32 (abfd, MTLR_R0, p);
5555 p = p + 4;
5556 if (r == 29)
5557 {
5558 p = restfpr (abfd, p, 30);
5559 p = restfpr (abfd, p, 31);
5560 }
5561 bfd_put_32 (abfd, BLR, p);
5562 return p + 4;
5563 }
5564
5565 static bfd_byte *
5566 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5567 {
5568 p = savefpr (abfd, p, r);
5569 bfd_put_32 (abfd, BLR, p);
5570 return p + 4;
5571 }
5572
5573 static bfd_byte *
5574 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5575 {
5576 p = restfpr (abfd, p, r);
5577 bfd_put_32 (abfd, BLR, p);
5578 return p + 4;
5579 }
5580
5581 static bfd_byte *
5582 savevr (bfd *abfd, bfd_byte *p, int r)
5583 {
5584 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5585 p = p + 4;
5586 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5587 return p + 4;
5588 }
5589
5590 static bfd_byte *
5591 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5592 {
5593 p = savevr (abfd, p, r);
5594 bfd_put_32 (abfd, BLR, p);
5595 return p + 4;
5596 }
5597
5598 static bfd_byte *
5599 restvr (bfd *abfd, bfd_byte *p, int r)
5600 {
5601 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5602 p = p + 4;
5603 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5604 return p + 4;
5605 }
5606
5607 static bfd_byte *
5608 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5609 {
5610 p = restvr (abfd, p, r);
5611 bfd_put_32 (abfd, BLR, p);
5612 return p + 4;
5613 }
5614
5615 /* Called via elf_link_hash_traverse to transfer dynamic linking
5616 information on function code symbol entries to their corresponding
5617 function descriptor symbol entries. */
5618
5619 static bfd_boolean
5620 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5621 {
5622 struct bfd_link_info *info;
5623 struct ppc_link_hash_table *htab;
5624 struct plt_entry *ent;
5625 struct ppc_link_hash_entry *fh;
5626 struct ppc_link_hash_entry *fdh;
5627 bfd_boolean force_local;
5628
5629 fh = (struct ppc_link_hash_entry *) h;
5630 if (fh->elf.root.type == bfd_link_hash_indirect)
5631 return TRUE;
5632
5633 if (fh->elf.root.type == bfd_link_hash_warning)
5634 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5635
5636 info = inf;
5637 htab = ppc_hash_table (info);
5638
5639 /* Resolve undefined references to dot-symbols as the value
5640 in the function descriptor, if we have one in a regular object.
5641 This is to satisfy cases like ".quad .foo". Calls to functions
5642 in dynamic objects are handled elsewhere. */
5643 if (fh->elf.root.type == bfd_link_hash_undefweak
5644 && fh->was_undefined
5645 && (fh->oh->elf.root.type == bfd_link_hash_defined
5646 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5647 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5648 && opd_entry_value (fh->oh->elf.root.u.def.section,
5649 fh->oh->elf.root.u.def.value,
5650 &fh->elf.root.u.def.section,
5651 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5652 {
5653 fh->elf.root.type = fh->oh->elf.root.type;
5654 fh->elf.forced_local = 1;
5655 fh->elf.def_regular = fh->oh->elf.def_regular;
5656 fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
5657 }
5658
5659 /* If this is a function code symbol, transfer dynamic linking
5660 information to the function descriptor symbol. */
5661 if (!fh->is_func)
5662 return TRUE;
5663
5664 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5665 if (ent->plt.refcount > 0)
5666 break;
5667 if (ent == NULL
5668 || fh->elf.root.root.string[0] != '.'
5669 || fh->elf.root.root.string[1] == '\0')
5670 return TRUE;
5671
5672 /* Find the corresponding function descriptor symbol. Create it
5673 as undefined if necessary. */
5674
5675 fdh = get_fdh (fh, htab);
5676 if (fdh != NULL)
5677 while (fdh->elf.root.type == bfd_link_hash_indirect
5678 || fdh->elf.root.type == bfd_link_hash_warning)
5679 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5680
5681 if (fdh == NULL
5682 && info->shared
5683 && (fh->elf.root.type == bfd_link_hash_undefined
5684 || fh->elf.root.type == bfd_link_hash_undefweak))
5685 {
5686 fdh = make_fdh (info, fh);
5687 if (fdh == NULL)
5688 return FALSE;
5689 }
5690
5691 /* Fake function descriptors are made undefweak. If the function
5692 code symbol is strong undefined, make the fake sym the same.
5693 If the function code symbol is defined, then force the fake
5694 descriptor local; We can't support overriding of symbols in a
5695 shared library on a fake descriptor. */
5696
5697 if (fdh != NULL
5698 && fdh->fake
5699 && fdh->elf.root.type == bfd_link_hash_undefweak)
5700 {
5701 if (fh->elf.root.type == bfd_link_hash_undefined)
5702 {
5703 fdh->elf.root.type = bfd_link_hash_undefined;
5704 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5705 }
5706 else if (fh->elf.root.type == bfd_link_hash_defined
5707 || fh->elf.root.type == bfd_link_hash_defweak)
5708 {
5709 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5710 }
5711 }
5712
5713 if (fdh != NULL
5714 && !fdh->elf.forced_local
5715 && (info->shared
5716 || fdh->elf.def_dynamic
5717 || fdh->elf.ref_dynamic
5718 || (fdh->elf.root.type == bfd_link_hash_undefweak
5719 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5720 {
5721 if (fdh->elf.dynindx == -1)
5722 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5723 return FALSE;
5724 fdh->elf.ref_regular |= fh->elf.ref_regular;
5725 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5726 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5727 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5728 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5729 {
5730 move_plt_plist (fh, fdh);
5731 fdh->elf.needs_plt = 1;
5732 }
5733 fdh->is_func_descriptor = 1;
5734 fdh->oh = fh;
5735 fh->oh = fdh;
5736 }
5737
5738 /* Now that the info is on the function descriptor, clear the
5739 function code sym info. Any function code syms for which we
5740 don't have a definition in a regular file, we force local.
5741 This prevents a shared library from exporting syms that have
5742 been imported from another library. Function code syms that
5743 are really in the library we must leave global to prevent the
5744 linker dragging in a definition from a static library. */
5745 force_local = (!fh->elf.def_regular
5746 || fdh == NULL
5747 || !fdh->elf.def_regular
5748 || fdh->elf.forced_local);
5749 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5750
5751 return TRUE;
5752 }
5753
5754 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5755 this hook to a) provide some gcc support functions, and b) transfer
5756 dynamic linking information gathered so far on function code symbol
5757 entries, to their corresponding function descriptor symbol entries. */
5758
5759 static bfd_boolean
5760 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5761 struct bfd_link_info *info)
5762 {
5763 struct ppc_link_hash_table *htab;
5764 unsigned int i;
5765 const struct sfpr_def_parms funcs[] =
5766 {
5767 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5768 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5769 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5770 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5771 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5772 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5773 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5774 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5775 { "._savef", 14, 31, savefpr, savefpr1_tail },
5776 { "._restf", 14, 31, restfpr, restfpr1_tail },
5777 { "_savevr_", 20, 31, savevr, savevr_tail },
5778 { "_restvr_", 20, 31, restvr, restvr_tail }
5779 };
5780
5781 htab = ppc_hash_table (info);
5782 if (htab->sfpr == NULL)
5783 /* We don't have any relocs. */
5784 return TRUE;
5785
5786 /* Provide any missing _save* and _rest* functions. */
5787 htab->sfpr->size = 0;
5788 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5789 if (!sfpr_define (info, &funcs[i]))
5790 return FALSE;
5791
5792 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5793
5794 if (htab->sfpr->size == 0)
5795 htab->sfpr->flags |= SEC_EXCLUDE;
5796
5797 return TRUE;
5798 }
5799
5800 /* Adjust a symbol defined by a dynamic object and referenced by a
5801 regular object. The current definition is in some section of the
5802 dynamic object, but we're not including those sections. We have to
5803 change the definition to something the rest of the link can
5804 understand. */
5805
5806 static bfd_boolean
5807 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5808 struct elf_link_hash_entry *h)
5809 {
5810 struct ppc_link_hash_table *htab;
5811 asection *s;
5812
5813 htab = ppc_hash_table (info);
5814
5815 /* Deal with function syms. */
5816 if (h->type == STT_FUNC
5817 || h->needs_plt)
5818 {
5819 /* Clear procedure linkage table information for any symbol that
5820 won't need a .plt entry. */
5821 struct plt_entry *ent;
5822 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5823 if (ent->plt.refcount > 0)
5824 break;
5825 if (ent == NULL
5826 || SYMBOL_CALLS_LOCAL (info, h)
5827 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5828 && h->root.type == bfd_link_hash_undefweak))
5829 {
5830 h->plt.plist = NULL;
5831 h->needs_plt = 0;
5832 }
5833 }
5834 else
5835 h->plt.plist = NULL;
5836
5837 /* If this is a weak symbol, and there is a real definition, the
5838 processor independent code will have arranged for us to see the
5839 real definition first, and we can just use the same value. */
5840 if (h->u.weakdef != NULL)
5841 {
5842 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5843 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5844 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5845 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5846 if (ELIMINATE_COPY_RELOCS)
5847 h->non_got_ref = h->u.weakdef->non_got_ref;
5848 return TRUE;
5849 }
5850
5851 /* If we are creating a shared library, we must presume that the
5852 only references to the symbol are via the global offset table.
5853 For such cases we need not do anything here; the relocations will
5854 be handled correctly by relocate_section. */
5855 if (info->shared)
5856 return TRUE;
5857
5858 /* If there are no references to this symbol that do not use the
5859 GOT, we don't need to generate a copy reloc. */
5860 if (!h->non_got_ref)
5861 return TRUE;
5862
5863 /* Don't generate a copy reloc for symbols defined in the executable. */
5864 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
5865 return TRUE;
5866
5867 if (ELIMINATE_COPY_RELOCS)
5868 {
5869 struct ppc_link_hash_entry * eh;
5870 struct ppc_dyn_relocs *p;
5871
5872 eh = (struct ppc_link_hash_entry *) h;
5873 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5874 {
5875 s = p->sec->output_section;
5876 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5877 break;
5878 }
5879
5880 /* If we didn't find any dynamic relocs in read-only sections, then
5881 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5882 if (p == NULL)
5883 {
5884 h->non_got_ref = 0;
5885 return TRUE;
5886 }
5887 }
5888
5889 if (h->plt.plist != NULL)
5890 {
5891 /* We should never get here, but unfortunately there are versions
5892 of gcc out there that improperly (for this ABI) put initialized
5893 function pointers, vtable refs and suchlike in read-only
5894 sections. Allow them to proceed, but warn that this might
5895 break at runtime. */
5896 (*_bfd_error_handler)
5897 (_("copy reloc against `%s' requires lazy plt linking; "
5898 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5899 h->root.root.string);
5900 }
5901
5902 /* This is a reference to a symbol defined by a dynamic object which
5903 is not a function. */
5904
5905 if (h->size == 0)
5906 {
5907 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5908 h->root.root.string);
5909 return TRUE;
5910 }
5911
5912 /* We must allocate the symbol in our .dynbss section, which will
5913 become part of the .bss section of the executable. There will be
5914 an entry for this symbol in the .dynsym section. The dynamic
5915 object will contain position independent code, so all references
5916 from the dynamic object to this symbol will go through the global
5917 offset table. The dynamic linker will use the .dynsym entry to
5918 determine the address it must put in the global offset table, so
5919 both the dynamic object and the regular object will refer to the
5920 same memory location for the variable. */
5921
5922 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5923 to copy the initial value out of the dynamic object and into the
5924 runtime process image. We need to remember the offset into the
5925 .rela.bss section we are going to use. */
5926 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5927 {
5928 htab->relbss->size += sizeof (Elf64_External_Rela);
5929 h->needs_copy = 1;
5930 }
5931
5932 s = htab->dynbss;
5933
5934 return _bfd_elf_adjust_dynamic_copy (h, s);
5935 }
5936
5937 /* If given a function descriptor symbol, hide both the function code
5938 sym and the descriptor. */
5939 static void
5940 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5941 struct elf_link_hash_entry *h,
5942 bfd_boolean force_local)
5943 {
5944 struct ppc_link_hash_entry *eh;
5945 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5946
5947 eh = (struct ppc_link_hash_entry *) h;
5948 if (eh->is_func_descriptor)
5949 {
5950 struct ppc_link_hash_entry *fh = eh->oh;
5951
5952 if (fh == NULL)
5953 {
5954 const char *p, *q;
5955 struct ppc_link_hash_table *htab;
5956 char save;
5957
5958 /* We aren't supposed to use alloca in BFD because on
5959 systems which do not have alloca the version in libiberty
5960 calls xmalloc, which might cause the program to crash
5961 when it runs out of memory. This function doesn't have a
5962 return status, so there's no way to gracefully return an
5963 error. So cheat. We know that string[-1] can be safely
5964 accessed; It's either a string in an ELF string table,
5965 or allocated in an objalloc structure. */
5966
5967 p = eh->elf.root.root.string - 1;
5968 save = *p;
5969 *(char *) p = '.';
5970 htab = ppc_hash_table (info);
5971 fh = (struct ppc_link_hash_entry *)
5972 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5973 *(char *) p = save;
5974
5975 /* Unfortunately, if it so happens that the string we were
5976 looking for was allocated immediately before this string,
5977 then we overwrote the string terminator. That's the only
5978 reason the lookup should fail. */
5979 if (fh == NULL)
5980 {
5981 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5982 while (q >= eh->elf.root.root.string && *q == *p)
5983 --q, --p;
5984 if (q < eh->elf.root.root.string && *p == '.')
5985 fh = (struct ppc_link_hash_entry *)
5986 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5987 }
5988 if (fh != NULL)
5989 {
5990 eh->oh = fh;
5991 fh->oh = eh;
5992 }
5993 }
5994 if (fh != NULL)
5995 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5996 }
5997 }
5998
5999 static bfd_boolean
6000 get_sym_h (struct elf_link_hash_entry **hp,
6001 Elf_Internal_Sym **symp,
6002 asection **symsecp,
6003 char **tls_maskp,
6004 Elf_Internal_Sym **locsymsp,
6005 unsigned long r_symndx,
6006 bfd *ibfd)
6007 {
6008 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6009
6010 if (r_symndx >= symtab_hdr->sh_info)
6011 {
6012 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6013 struct elf_link_hash_entry *h;
6014
6015 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6016 while (h->root.type == bfd_link_hash_indirect
6017 || h->root.type == bfd_link_hash_warning)
6018 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6019
6020 if (hp != NULL)
6021 *hp = h;
6022
6023 if (symp != NULL)
6024 *symp = NULL;
6025
6026 if (symsecp != NULL)
6027 {
6028 asection *symsec = NULL;
6029 if (h->root.type == bfd_link_hash_defined
6030 || h->root.type == bfd_link_hash_defweak)
6031 symsec = h->root.u.def.section;
6032 *symsecp = symsec;
6033 }
6034
6035 if (tls_maskp != NULL)
6036 {
6037 struct ppc_link_hash_entry *eh;
6038
6039 eh = (struct ppc_link_hash_entry *) h;
6040 *tls_maskp = &eh->tls_mask;
6041 }
6042 }
6043 else
6044 {
6045 Elf_Internal_Sym *sym;
6046 Elf_Internal_Sym *locsyms = *locsymsp;
6047
6048 if (locsyms == NULL)
6049 {
6050 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6051 if (locsyms == NULL)
6052 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6053 symtab_hdr->sh_info,
6054 0, NULL, NULL, NULL);
6055 if (locsyms == NULL)
6056 return FALSE;
6057 *locsymsp = locsyms;
6058 }
6059 sym = locsyms + r_symndx;
6060
6061 if (hp != NULL)
6062 *hp = NULL;
6063
6064 if (symp != NULL)
6065 *symp = sym;
6066
6067 if (symsecp != NULL)
6068 {
6069 asection *symsec = NULL;
6070 if ((sym->st_shndx != SHN_UNDEF
6071 && sym->st_shndx < SHN_LORESERVE)
6072 || sym->st_shndx > SHN_HIRESERVE)
6073 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6074 *symsecp = symsec;
6075 }
6076
6077 if (tls_maskp != NULL)
6078 {
6079 struct got_entry **lgot_ents;
6080 char *tls_mask;
6081
6082 tls_mask = NULL;
6083 lgot_ents = elf_local_got_ents (ibfd);
6084 if (lgot_ents != NULL)
6085 {
6086 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6087 tls_mask = &lgot_masks[r_symndx];
6088 }
6089 *tls_maskp = tls_mask;
6090 }
6091 }
6092 return TRUE;
6093 }
6094
6095 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6096 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6097 type suitable for optimization, and 1 otherwise. */
6098
6099 static int
6100 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6101 Elf_Internal_Sym **locsymsp,
6102 const Elf_Internal_Rela *rel, bfd *ibfd)
6103 {
6104 unsigned long r_symndx;
6105 int next_r;
6106 struct elf_link_hash_entry *h;
6107 Elf_Internal_Sym *sym;
6108 asection *sec;
6109 bfd_vma off;
6110
6111 r_symndx = ELF64_R_SYM (rel->r_info);
6112 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6113 return 0;
6114
6115 if ((*tls_maskp != NULL && **tls_maskp != 0)
6116 || sec == NULL
6117 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6118 return 1;
6119
6120 /* Look inside a TOC section too. */
6121 if (h != NULL)
6122 {
6123 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6124 off = h->root.u.def.value;
6125 }
6126 else
6127 off = sym->st_value;
6128 off += rel->r_addend;
6129 BFD_ASSERT (off % 8 == 0);
6130 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6131 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6132 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6133 return 0;
6134 if (toc_symndx != NULL)
6135 *toc_symndx = r_symndx;
6136 if ((h == NULL
6137 || ((h->root.type == bfd_link_hash_defined
6138 || h->root.type == bfd_link_hash_defweak)
6139 && !h->def_dynamic))
6140 && (next_r == -1 || next_r == -2))
6141 return 1 - next_r;
6142 return 1;
6143 }
6144
6145 /* Adjust all global syms defined in opd sections. In gcc generated
6146 code for the old ABI, these will already have been done. */
6147
6148 static bfd_boolean
6149 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6150 {
6151 struct ppc_link_hash_entry *eh;
6152 asection *sym_sec;
6153 struct _opd_sec_data *opd;
6154
6155 if (h->root.type == bfd_link_hash_indirect)
6156 return TRUE;
6157
6158 if (h->root.type == bfd_link_hash_warning)
6159 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6160
6161 if (h->root.type != bfd_link_hash_defined
6162 && h->root.type != bfd_link_hash_defweak)
6163 return TRUE;
6164
6165 eh = (struct ppc_link_hash_entry *) h;
6166 if (eh->adjust_done)
6167 return TRUE;
6168
6169 sym_sec = eh->elf.root.u.def.section;
6170 opd = get_opd_info (sym_sec);
6171 if (opd != NULL && opd->adjust != NULL)
6172 {
6173 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6174 if (adjust == -1)
6175 {
6176 /* This entry has been deleted. */
6177 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6178 if (dsec == NULL)
6179 {
6180 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6181 if (elf_discarded_section (dsec))
6182 {
6183 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6184 break;
6185 }
6186 }
6187 eh->elf.root.u.def.value = 0;
6188 eh->elf.root.u.def.section = dsec;
6189 }
6190 else
6191 eh->elf.root.u.def.value += adjust;
6192 eh->adjust_done = 1;
6193 }
6194 return TRUE;
6195 }
6196
6197 /* Handles decrementing dynamic reloc counts for the reloc specified by
6198 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6199 have already been determined. */
6200
6201 static bfd_boolean
6202 dec_dynrel_count (bfd_vma r_info,
6203 asection *sec,
6204 struct bfd_link_info *info,
6205 Elf_Internal_Sym **local_syms,
6206 struct elf_link_hash_entry *h,
6207 asection *sym_sec)
6208 {
6209 enum elf_ppc64_reloc_type r_type;
6210 struct ppc_dyn_relocs *p;
6211 struct ppc_dyn_relocs **pp;
6212
6213 /* Can this reloc be dynamic? This switch, and later tests here
6214 should be kept in sync with the code in check_relocs. */
6215 r_type = ELF64_R_TYPE (r_info);
6216 switch (r_type)
6217 {
6218 default:
6219 return TRUE;
6220
6221 case R_PPC64_TPREL16:
6222 case R_PPC64_TPREL16_LO:
6223 case R_PPC64_TPREL16_HI:
6224 case R_PPC64_TPREL16_HA:
6225 case R_PPC64_TPREL16_DS:
6226 case R_PPC64_TPREL16_LO_DS:
6227 case R_PPC64_TPREL16_HIGHER:
6228 case R_PPC64_TPREL16_HIGHERA:
6229 case R_PPC64_TPREL16_HIGHEST:
6230 case R_PPC64_TPREL16_HIGHESTA:
6231 if (!info->shared)
6232 return TRUE;
6233
6234 case R_PPC64_TPREL64:
6235 case R_PPC64_DTPMOD64:
6236 case R_PPC64_DTPREL64:
6237 case R_PPC64_ADDR64:
6238 case R_PPC64_REL30:
6239 case R_PPC64_REL32:
6240 case R_PPC64_REL64:
6241 case R_PPC64_ADDR14:
6242 case R_PPC64_ADDR14_BRNTAKEN:
6243 case R_PPC64_ADDR14_BRTAKEN:
6244 case R_PPC64_ADDR16:
6245 case R_PPC64_ADDR16_DS:
6246 case R_PPC64_ADDR16_HA:
6247 case R_PPC64_ADDR16_HI:
6248 case R_PPC64_ADDR16_HIGHER:
6249 case R_PPC64_ADDR16_HIGHERA:
6250 case R_PPC64_ADDR16_HIGHEST:
6251 case R_PPC64_ADDR16_HIGHESTA:
6252 case R_PPC64_ADDR16_LO:
6253 case R_PPC64_ADDR16_LO_DS:
6254 case R_PPC64_ADDR24:
6255 case R_PPC64_ADDR32:
6256 case R_PPC64_UADDR16:
6257 case R_PPC64_UADDR32:
6258 case R_PPC64_UADDR64:
6259 case R_PPC64_TOC:
6260 break;
6261 }
6262
6263 if (local_syms != NULL)
6264 {
6265 unsigned long r_symndx;
6266 Elf_Internal_Sym *sym;
6267 bfd *ibfd = sec->owner;
6268
6269 r_symndx = ELF64_R_SYM (r_info);
6270 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6271 return FALSE;
6272 }
6273
6274 if ((info->shared
6275 && (MUST_BE_DYN_RELOC (r_type)
6276 || (h != NULL
6277 && (!info->symbolic
6278 || h->root.type == bfd_link_hash_defweak
6279 || !h->def_regular))))
6280 || (ELIMINATE_COPY_RELOCS
6281 && !info->shared
6282 && h != NULL
6283 && (h->root.type == bfd_link_hash_defweak
6284 || !h->def_regular)))
6285 ;
6286 else
6287 return TRUE;
6288
6289 if (h != NULL)
6290 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6291 else
6292 {
6293 if (sym_sec != NULL)
6294 {
6295 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6296 pp = (struct ppc_dyn_relocs **) vpp;
6297 }
6298 else
6299 {
6300 void *vpp = &elf_section_data (sec)->local_dynrel;
6301 pp = (struct ppc_dyn_relocs **) vpp;
6302 }
6303
6304 /* elf_gc_sweep may have already removed all dyn relocs associated
6305 with local syms for a given section. Don't report a dynreloc
6306 miscount. */
6307 if (*pp == NULL)
6308 return TRUE;
6309 }
6310
6311 while ((p = *pp) != NULL)
6312 {
6313 if (p->sec == sec)
6314 {
6315 if (!MUST_BE_DYN_RELOC (r_type))
6316 p->pc_count -= 1;
6317 p->count -= 1;
6318 if (p->count == 0)
6319 *pp = p->next;
6320 return TRUE;
6321 }
6322 pp = &p->next;
6323 }
6324
6325 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6326 sec->owner, sec);
6327 bfd_set_error (bfd_error_bad_value);
6328 return FALSE;
6329 }
6330
6331 /* Remove unused Official Procedure Descriptor entries. Currently we
6332 only remove those associated with functions in discarded link-once
6333 sections, or weakly defined functions that have been overridden. It
6334 would be possible to remove many more entries for statically linked
6335 applications. */
6336
6337 bfd_boolean
6338 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6339 bfd_boolean non_overlapping)
6340 {
6341 bfd *ibfd;
6342 bfd_boolean some_edited = FALSE;
6343 asection *need_pad = NULL;
6344
6345 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6346 {
6347 asection *sec;
6348 Elf_Internal_Rela *relstart, *rel, *relend;
6349 Elf_Internal_Shdr *symtab_hdr;
6350 Elf_Internal_Sym *local_syms;
6351 struct elf_link_hash_entry **sym_hashes;
6352 bfd_vma offset;
6353 struct _opd_sec_data *opd;
6354 bfd_boolean need_edit, add_aux_fields;
6355 bfd_size_type cnt_16b = 0;
6356
6357 sec = bfd_get_section_by_name (ibfd, ".opd");
6358 if (sec == NULL || sec->size == 0)
6359 continue;
6360
6361 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6362 continue;
6363
6364 if (sec->output_section == bfd_abs_section_ptr)
6365 continue;
6366
6367 /* Look through the section relocs. */
6368 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6369 continue;
6370
6371 local_syms = NULL;
6372 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6373 sym_hashes = elf_sym_hashes (ibfd);
6374
6375 /* Read the relocations. */
6376 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6377 info->keep_memory);
6378 if (relstart == NULL)
6379 return FALSE;
6380
6381 /* First run through the relocs to check they are sane, and to
6382 determine whether we need to edit this opd section. */
6383 need_edit = FALSE;
6384 need_pad = sec;
6385 offset = 0;
6386 relend = relstart + sec->reloc_count;
6387 for (rel = relstart; rel < relend; )
6388 {
6389 enum elf_ppc64_reloc_type r_type;
6390 unsigned long r_symndx;
6391 asection *sym_sec;
6392 struct elf_link_hash_entry *h;
6393 Elf_Internal_Sym *sym;
6394
6395 /* .opd contains a regular array of 16 or 24 byte entries. We're
6396 only interested in the reloc pointing to a function entry
6397 point. */
6398 if (rel->r_offset != offset
6399 || rel + 1 >= relend
6400 || (rel + 1)->r_offset != offset + 8)
6401 {
6402 /* If someone messes with .opd alignment then after a
6403 "ld -r" we might have padding in the middle of .opd.
6404 Also, there's nothing to prevent someone putting
6405 something silly in .opd with the assembler. No .opd
6406 optimization for them! */
6407 broken_opd:
6408 (*_bfd_error_handler)
6409 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6410 need_edit = FALSE;
6411 break;
6412 }
6413
6414 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6415 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6416 {
6417 (*_bfd_error_handler)
6418 (_("%B: unexpected reloc type %u in .opd section"),
6419 ibfd, r_type);
6420 need_edit = FALSE;
6421 break;
6422 }
6423
6424 r_symndx = ELF64_R_SYM (rel->r_info);
6425 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6426 r_symndx, ibfd))
6427 goto error_ret;
6428
6429 if (sym_sec == NULL || sym_sec->owner == NULL)
6430 {
6431 const char *sym_name;
6432 if (h != NULL)
6433 sym_name = h->root.root.string;
6434 else
6435 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6436 sym_sec);
6437
6438 (*_bfd_error_handler)
6439 (_("%B: undefined sym `%s' in .opd section"),
6440 ibfd, sym_name);
6441 need_edit = FALSE;
6442 break;
6443 }
6444
6445 /* opd entries are always for functions defined in the
6446 current input bfd. If the symbol isn't defined in the
6447 input bfd, then we won't be using the function in this
6448 bfd; It must be defined in a linkonce section in another
6449 bfd, or is weak. It's also possible that we are
6450 discarding the function due to a linker script /DISCARD/,
6451 which we test for via the output_section. */
6452 if (sym_sec->owner != ibfd
6453 || sym_sec->output_section == bfd_abs_section_ptr)
6454 need_edit = TRUE;
6455
6456 rel += 2;
6457 if (rel == relend
6458 || (rel + 1 == relend && rel->r_offset == offset + 16))
6459 {
6460 if (sec->size == offset + 24)
6461 {
6462 need_pad = NULL;
6463 break;
6464 }
6465 if (rel == relend && sec->size == offset + 16)
6466 {
6467 cnt_16b++;
6468 break;
6469 }
6470 goto broken_opd;
6471 }
6472
6473 if (rel->r_offset == offset + 24)
6474 offset += 24;
6475 else if (rel->r_offset != offset + 16)
6476 goto broken_opd;
6477 else if (rel + 1 < relend
6478 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6479 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6480 {
6481 offset += 16;
6482 cnt_16b++;
6483 }
6484 else if (rel + 2 < relend
6485 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6486 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6487 {
6488 offset += 24;
6489 rel += 1;
6490 }
6491 else
6492 goto broken_opd;
6493 }
6494
6495 add_aux_fields = non_overlapping && cnt_16b > 0;
6496
6497 if (need_edit || add_aux_fields)
6498 {
6499 Elf_Internal_Rela *write_rel;
6500 bfd_byte *rptr, *wptr;
6501 bfd_byte *new_contents = NULL;
6502 bfd_boolean skip;
6503 long opd_ent_size;
6504 bfd_size_type amt;
6505
6506 amt = sec->size * sizeof (long) / 8;
6507 opd = &ppc64_elf_section_data (sec)->u.opd;
6508 opd->adjust = bfd_zalloc (obfd, amt);
6509 if (opd->adjust == NULL)
6510 return FALSE;
6511 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6512
6513 /* This seems a waste of time as input .opd sections are all
6514 zeros as generated by gcc, but I suppose there's no reason
6515 this will always be so. We might start putting something in
6516 the third word of .opd entries. */
6517 if ((sec->flags & SEC_IN_MEMORY) == 0)
6518 {
6519 bfd_byte *loc;
6520 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6521 {
6522 if (loc != NULL)
6523 free (loc);
6524 error_ret:
6525 if (local_syms != NULL
6526 && symtab_hdr->contents != (unsigned char *) local_syms)
6527 free (local_syms);
6528 if (elf_section_data (sec)->relocs != relstart)
6529 free (relstart);
6530 return FALSE;
6531 }
6532 sec->contents = loc;
6533 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6534 }
6535
6536 elf_section_data (sec)->relocs = relstart;
6537
6538 new_contents = sec->contents;
6539 if (add_aux_fields)
6540 {
6541 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6542 if (new_contents == NULL)
6543 return FALSE;
6544 need_pad = FALSE;
6545 }
6546 wptr = new_contents;
6547 rptr = sec->contents;
6548
6549 write_rel = relstart;
6550 skip = FALSE;
6551 offset = 0;
6552 opd_ent_size = 0;
6553 for (rel = relstart; rel < relend; rel++)
6554 {
6555 unsigned long r_symndx;
6556 asection *sym_sec;
6557 struct elf_link_hash_entry *h;
6558 Elf_Internal_Sym *sym;
6559
6560 r_symndx = ELF64_R_SYM (rel->r_info);
6561 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6562 r_symndx, ibfd))
6563 goto error_ret;
6564
6565 if (rel->r_offset == offset)
6566 {
6567 struct ppc_link_hash_entry *fdh = NULL;
6568
6569 /* See if the .opd entry is full 24 byte or
6570 16 byte (with fd_aux entry overlapped with next
6571 fd_func). */
6572 opd_ent_size = 24;
6573 if ((rel + 2 == relend && sec->size == offset + 16)
6574 || (rel + 3 < relend
6575 && rel[2].r_offset == offset + 16
6576 && rel[3].r_offset == offset + 24
6577 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6578 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6579 opd_ent_size = 16;
6580
6581 if (h != NULL
6582 && h->root.root.string[0] == '.')
6583 {
6584 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6585 ppc_hash_table (info));
6586 if (fdh != NULL
6587 && fdh->elf.root.type != bfd_link_hash_defined
6588 && fdh->elf.root.type != bfd_link_hash_defweak)
6589 fdh = NULL;
6590 }
6591
6592 skip = (sym_sec->owner != ibfd
6593 || sym_sec->output_section == bfd_abs_section_ptr);
6594 if (skip)
6595 {
6596 if (fdh != NULL && sym_sec->owner == ibfd)
6597 {
6598 /* Arrange for the function descriptor sym
6599 to be dropped. */
6600 fdh->elf.root.u.def.value = 0;
6601 fdh->elf.root.u.def.section = sym_sec;
6602 }
6603 opd->adjust[rel->r_offset / 8] = -1;
6604 }
6605 else
6606 {
6607 /* We'll be keeping this opd entry. */
6608
6609 if (fdh != NULL)
6610 {
6611 /* Redefine the function descriptor symbol to
6612 this location in the opd section. It is
6613 necessary to update the value here rather
6614 than using an array of adjustments as we do
6615 for local symbols, because various places
6616 in the generic ELF code use the value
6617 stored in u.def.value. */
6618 fdh->elf.root.u.def.value = wptr - new_contents;
6619 fdh->adjust_done = 1;
6620 }
6621
6622 /* Local syms are a bit tricky. We could
6623 tweak them as they can be cached, but
6624 we'd need to look through the local syms
6625 for the function descriptor sym which we
6626 don't have at the moment. So keep an
6627 array of adjustments. */
6628 opd->adjust[rel->r_offset / 8]
6629 = (wptr - new_contents) - (rptr - sec->contents);
6630
6631 if (wptr != rptr)
6632 memcpy (wptr, rptr, opd_ent_size);
6633 wptr += opd_ent_size;
6634 if (add_aux_fields && opd_ent_size == 16)
6635 {
6636 memset (wptr, '\0', 8);
6637 wptr += 8;
6638 }
6639 }
6640 rptr += opd_ent_size;
6641 offset += opd_ent_size;
6642 }
6643
6644 if (skip)
6645 {
6646 if (!NO_OPD_RELOCS
6647 && !info->relocatable
6648 && !dec_dynrel_count (rel->r_info, sec, info,
6649 NULL, h, sym_sec))
6650 goto error_ret;
6651 }
6652 else
6653 {
6654 /* We need to adjust any reloc offsets to point to the
6655 new opd entries. While we're at it, we may as well
6656 remove redundant relocs. */
6657 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
6658 if (write_rel != rel)
6659 memcpy (write_rel, rel, sizeof (*rel));
6660 ++write_rel;
6661 }
6662 }
6663
6664 sec->size = wptr - new_contents;
6665 sec->reloc_count = write_rel - relstart;
6666 if (add_aux_fields)
6667 {
6668 free (sec->contents);
6669 sec->contents = new_contents;
6670 }
6671
6672 /* Fudge the header size too, as this is used later in
6673 elf_bfd_final_link if we are emitting relocs. */
6674 elf_section_data (sec)->rel_hdr.sh_size
6675 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6676 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6677 some_edited = TRUE;
6678 }
6679 else if (elf_section_data (sec)->relocs != relstart)
6680 free (relstart);
6681
6682 if (local_syms != NULL
6683 && symtab_hdr->contents != (unsigned char *) local_syms)
6684 {
6685 if (!info->keep_memory)
6686 free (local_syms);
6687 else
6688 symtab_hdr->contents = (unsigned char *) local_syms;
6689 }
6690 }
6691
6692 if (some_edited)
6693 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6694
6695 /* If we are doing a final link and the last .opd entry is just 16 byte
6696 long, add a 8 byte padding after it. */
6697 if (need_pad != NULL && !info->relocatable)
6698 {
6699 bfd_byte *p;
6700
6701 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6702 {
6703 BFD_ASSERT (need_pad->size > 0);
6704
6705 p = bfd_malloc (need_pad->size + 8);
6706 if (p == NULL)
6707 return FALSE;
6708
6709 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6710 p, 0, need_pad->size))
6711 return FALSE;
6712
6713 need_pad->contents = p;
6714 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6715 }
6716 else
6717 {
6718 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6719 if (p == NULL)
6720 return FALSE;
6721
6722 need_pad->contents = p;
6723 }
6724
6725 memset (need_pad->contents + need_pad->size, 0, 8);
6726 need_pad->size += 8;
6727 }
6728
6729 return TRUE;
6730 }
6731
6732 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6733
6734 asection *
6735 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6736 {
6737 struct ppc_link_hash_table *htab;
6738
6739 htab = ppc_hash_table (info);
6740 if (htab->tls_get_addr != NULL)
6741 {
6742 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6743
6744 while (h->elf.root.type == bfd_link_hash_indirect
6745 || h->elf.root.type == bfd_link_hash_warning)
6746 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6747
6748 htab->tls_get_addr = h;
6749
6750 if (htab->tls_get_addr_fd == NULL
6751 && h->oh != NULL
6752 && h->oh->is_func_descriptor
6753 && (h->oh->elf.root.type == bfd_link_hash_defined
6754 || h->oh->elf.root.type == bfd_link_hash_defweak))
6755 htab->tls_get_addr_fd = h->oh;
6756 }
6757
6758 if (htab->tls_get_addr_fd != NULL)
6759 {
6760 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6761
6762 while (h->elf.root.type == bfd_link_hash_indirect
6763 || h->elf.root.type == bfd_link_hash_warning)
6764 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6765
6766 htab->tls_get_addr_fd = h;
6767 }
6768
6769 return _bfd_elf_tls_setup (obfd, info);
6770 }
6771
6772 /* Run through all the TLS relocs looking for optimization
6773 opportunities. The linker has been hacked (see ppc64elf.em) to do
6774 a preliminary section layout so that we know the TLS segment
6775 offsets. We can't optimize earlier because some optimizations need
6776 to know the tp offset, and we need to optimize before allocating
6777 dynamic relocations. */
6778
6779 bfd_boolean
6780 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6781 {
6782 bfd *ibfd;
6783 asection *sec;
6784 struct ppc_link_hash_table *htab;
6785 int pass;
6786
6787 if (info->relocatable || info->shared)
6788 return TRUE;
6789
6790 htab = ppc_hash_table (info);
6791 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6792 {
6793 Elf_Internal_Sym *locsyms = NULL;
6794 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6795 unsigned char *toc_ref = NULL;
6796
6797 /* Look at all the sections for this file. Make two passes over
6798 the relocs. On the first pass, mark toc entries involved
6799 with tls relocs, and check that tls relocs involved in
6800 setting up a tls_get_addr call are indeed followed by such a
6801 call. If they are not, exclude them from the optimizations
6802 done on the second pass. */
6803 for (pass = 0; pass < 2; ++pass)
6804 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6805 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6806 {
6807 Elf_Internal_Rela *relstart, *rel, *relend;
6808
6809 /* Read the relocations. */
6810 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6811 info->keep_memory);
6812 if (relstart == NULL)
6813 return FALSE;
6814
6815 relend = relstart + sec->reloc_count;
6816 for (rel = relstart; rel < relend; rel++)
6817 {
6818 enum elf_ppc64_reloc_type r_type;
6819 unsigned long r_symndx;
6820 struct elf_link_hash_entry *h;
6821 Elf_Internal_Sym *sym;
6822 asection *sym_sec;
6823 char *tls_mask;
6824 char tls_set, tls_clear, tls_type = 0;
6825 bfd_vma value;
6826 bfd_boolean ok_tprel, is_local;
6827 long toc_ref_index = 0;
6828 int expecting_tls_get_addr = 0;
6829
6830 r_symndx = ELF64_R_SYM (rel->r_info);
6831 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6832 r_symndx, ibfd))
6833 {
6834 err_free_rel:
6835 if (elf_section_data (sec)->relocs != relstart)
6836 free (relstart);
6837 if (toc_ref != NULL)
6838 free (toc_ref);
6839 if (locsyms != NULL
6840 && (elf_tdata (ibfd)->symtab_hdr.contents
6841 != (unsigned char *) locsyms))
6842 free (locsyms);
6843 return FALSE;
6844 }
6845
6846 if (h != NULL)
6847 {
6848 if (h->root.type != bfd_link_hash_defined
6849 && h->root.type != bfd_link_hash_defweak)
6850 continue;
6851 value = h->root.u.def.value;
6852 }
6853 else
6854 /* Symbols referenced by TLS relocs must be of type
6855 STT_TLS. So no need for .opd local sym adjust. */
6856 value = sym->st_value;
6857
6858 ok_tprel = FALSE;
6859 is_local = FALSE;
6860 if (h == NULL
6861 || !h->def_dynamic)
6862 {
6863 is_local = TRUE;
6864 value += sym_sec->output_offset;
6865 value += sym_sec->output_section->vma;
6866 value -= htab->elf.tls_sec->vma;
6867 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6868 < (bfd_vma) 1 << 32);
6869 }
6870
6871 r_type = ELF64_R_TYPE (rel->r_info);
6872 switch (r_type)
6873 {
6874 case R_PPC64_GOT_TLSLD16:
6875 case R_PPC64_GOT_TLSLD16_LO:
6876 expecting_tls_get_addr = 1;
6877 /* Fall thru */
6878
6879 case R_PPC64_GOT_TLSLD16_HI:
6880 case R_PPC64_GOT_TLSLD16_HA:
6881 /* These relocs should never be against a symbol
6882 defined in a shared lib. Leave them alone if
6883 that turns out to be the case. */
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 break;
6892
6893 case R_PPC64_GOT_TLSGD16:
6894 case R_PPC64_GOT_TLSGD16_LO:
6895 expecting_tls_get_addr = 1;
6896 /* Fall thru */
6897
6898 case R_PPC64_GOT_TLSGD16_HI:
6899 case R_PPC64_GOT_TLSGD16_HA:
6900 if (ok_tprel)
6901 /* GD -> LE */
6902 tls_set = 0;
6903 else
6904 /* GD -> IE */
6905 tls_set = TLS_TLS | TLS_TPRELGD;
6906 tls_clear = TLS_GD;
6907 tls_type = TLS_TLS | TLS_GD;
6908 break;
6909
6910 case R_PPC64_GOT_TPREL16_DS:
6911 case R_PPC64_GOT_TPREL16_LO_DS:
6912 case R_PPC64_GOT_TPREL16_HI:
6913 case R_PPC64_GOT_TPREL16_HA:
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 continue;
6923
6924 case R_PPC64_TOC16:
6925 case R_PPC64_TOC16_LO:
6926 case R_PPC64_TLS:
6927 if (sym_sec == NULL || sym_sec != toc)
6928 continue;
6929
6930 /* Mark this toc entry as referenced by a TLS
6931 code sequence. We can do that now in the
6932 case of R_PPC64_TLS, and after checking for
6933 tls_get_addr for the TOC16 relocs. */
6934 if (toc_ref == NULL)
6935 {
6936 toc_ref = bfd_zmalloc (toc->size / 8);
6937 if (toc_ref == NULL)
6938 goto err_free_rel;
6939 }
6940 if (h != NULL)
6941 value = h->root.u.def.value;
6942 else
6943 value = sym->st_value;
6944 value += rel->r_addend;
6945 BFD_ASSERT (value < toc->size && value % 8 == 0);
6946 toc_ref_index = value / 8;
6947 if (r_type == R_PPC64_TLS)
6948 {
6949 toc_ref[toc_ref_index] = 1;
6950 continue;
6951 }
6952
6953 if (pass != 0 && toc_ref[toc_ref_index] == 0)
6954 continue;
6955
6956 tls_set = 0;
6957 tls_clear = 0;
6958 expecting_tls_get_addr = 2;
6959 break;
6960
6961 case R_PPC64_TPREL64:
6962 if (pass == 0
6963 || sec != toc
6964 || toc_ref == NULL
6965 || !toc_ref[rel->r_offset / 8])
6966 continue;
6967 if (ok_tprel)
6968 {
6969 /* IE -> LE */
6970 tls_set = TLS_EXPLICIT;
6971 tls_clear = TLS_TPREL;
6972 break;
6973 }
6974 continue;
6975
6976 case R_PPC64_DTPMOD64:
6977 if (pass == 0
6978 || sec != toc
6979 || toc_ref == NULL
6980 || !toc_ref[rel->r_offset / 8])
6981 continue;
6982 if (rel + 1 < relend
6983 && (rel[1].r_info
6984 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6985 && rel[1].r_offset == rel->r_offset + 8)
6986 {
6987 if (ok_tprel)
6988 /* GD -> LE */
6989 tls_set = TLS_EXPLICIT | TLS_GD;
6990 else
6991 /* GD -> IE */
6992 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6993 tls_clear = TLS_GD;
6994 }
6995 else
6996 {
6997 if (!is_local)
6998 continue;
6999
7000 /* LD -> LE */
7001 tls_set = TLS_EXPLICIT;
7002 tls_clear = TLS_LD;
7003 }
7004 break;
7005
7006 default:
7007 continue;
7008 }
7009
7010 if (pass == 0)
7011 {
7012 if (!expecting_tls_get_addr)
7013 continue;
7014
7015 if (rel + 1 < relend)
7016 {
7017 Elf_Internal_Shdr *symtab_hdr;
7018 enum elf_ppc64_reloc_type r_type2;
7019 unsigned long r_symndx2;
7020 struct elf_link_hash_entry *h2;
7021
7022 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7023
7024 /* The next instruction should be a call to
7025 __tls_get_addr. Peek at the reloc to be sure. */
7026 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7027 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7028 if (r_symndx2 >= symtab_hdr->sh_info
7029 && (r_type2 == R_PPC64_REL14
7030 || r_type2 == R_PPC64_REL14_BRTAKEN
7031 || r_type2 == R_PPC64_REL14_BRNTAKEN
7032 || r_type2 == R_PPC64_REL24))
7033 {
7034 struct elf_link_hash_entry **sym_hashes;
7035
7036 sym_hashes = elf_sym_hashes (ibfd);
7037
7038 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7039 while (h2->root.type == bfd_link_hash_indirect
7040 || h2->root.type == bfd_link_hash_warning)
7041 h2 = ((struct elf_link_hash_entry *)
7042 h2->root.u.i.link);
7043 if (h2 != NULL
7044 && (h2 == &htab->tls_get_addr->elf
7045 || h2 == &htab->tls_get_addr_fd->elf))
7046 {
7047 if (expecting_tls_get_addr == 2)
7048 {
7049 /* Check for toc tls entries. */
7050 char *toc_tls;
7051 int retval;
7052
7053 retval = get_tls_mask (&toc_tls, NULL,
7054 &locsyms,
7055 rel, ibfd);
7056 if (retval == 0)
7057 goto err_free_rel;
7058 if (retval > 1 && toc_tls != NULL)
7059 toc_ref[toc_ref_index] = 1;
7060 }
7061 continue;
7062 }
7063 }
7064 }
7065
7066 if (expecting_tls_get_addr != 1)
7067 continue;
7068
7069 /* Uh oh, we didn't find the expected call. We
7070 could just mark this symbol to exclude it
7071 from tls optimization but it's safer to skip
7072 the entire section. */
7073 sec->has_tls_reloc = 0;
7074 break;
7075 }
7076
7077 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7078 {
7079 struct plt_entry *ent;
7080 for (ent = htab->tls_get_addr->elf.plt.plist;
7081 ent != NULL;
7082 ent = ent->next)
7083 if (ent->addend == 0)
7084 {
7085 if (ent->plt.refcount > 0)
7086 {
7087 ent->plt.refcount -= 1;
7088 expecting_tls_get_addr = 0;
7089 }
7090 break;
7091 }
7092 }
7093
7094 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7095 {
7096 struct plt_entry *ent;
7097 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7098 ent != NULL;
7099 ent = ent->next)
7100 if (ent->addend == 0)
7101 {
7102 if (ent->plt.refcount > 0)
7103 ent->plt.refcount -= 1;
7104 break;
7105 }
7106 }
7107
7108 if (tls_clear == 0)
7109 continue;
7110
7111 if ((tls_set & TLS_EXPLICIT) == 0)
7112 {
7113 struct got_entry *ent;
7114
7115 /* Adjust got entry for this reloc. */
7116 if (h != NULL)
7117 ent = h->got.glist;
7118 else
7119 ent = elf_local_got_ents (ibfd)[r_symndx];
7120
7121 for (; ent != NULL; ent = ent->next)
7122 if (ent->addend == rel->r_addend
7123 && ent->owner == ibfd
7124 && ent->tls_type == tls_type)
7125 break;
7126 if (ent == NULL)
7127 abort ();
7128
7129 if (tls_set == 0)
7130 {
7131 /* We managed to get rid of a got entry. */
7132 if (ent->got.refcount > 0)
7133 ent->got.refcount -= 1;
7134 }
7135 }
7136 else
7137 {
7138 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7139 we'll lose one or two dyn relocs. */
7140 if (!dec_dynrel_count (rel->r_info, sec, info,
7141 NULL, h, sym_sec))
7142 return FALSE;
7143
7144 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7145 {
7146 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7147 NULL, h, sym_sec))
7148 return FALSE;
7149 }
7150 }
7151
7152 *tls_mask |= tls_set;
7153 *tls_mask &= ~tls_clear;
7154 }
7155
7156 if (elf_section_data (sec)->relocs != relstart)
7157 free (relstart);
7158 }
7159
7160 if (toc_ref != NULL)
7161 free (toc_ref);
7162
7163 if (locsyms != NULL
7164 && (elf_tdata (ibfd)->symtab_hdr.contents
7165 != (unsigned char *) locsyms))
7166 {
7167 if (!info->keep_memory)
7168 free (locsyms);
7169 else
7170 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7171 }
7172 }
7173 return TRUE;
7174 }
7175
7176 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7177 the values of any global symbols in a toc section that has been
7178 edited. Globals in toc sections should be a rarity, so this function
7179 sets a flag if any are found in toc sections other than the one just
7180 edited, so that futher hash table traversals can be avoided. */
7181
7182 struct adjust_toc_info
7183 {
7184 asection *toc;
7185 unsigned long *skip;
7186 bfd_boolean global_toc_syms;
7187 };
7188
7189 static bfd_boolean
7190 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7191 {
7192 struct ppc_link_hash_entry *eh;
7193 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7194
7195 if (h->root.type == bfd_link_hash_indirect)
7196 return TRUE;
7197
7198 if (h->root.type == bfd_link_hash_warning)
7199 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7200
7201 if (h->root.type != bfd_link_hash_defined
7202 && h->root.type != bfd_link_hash_defweak)
7203 return TRUE;
7204
7205 eh = (struct ppc_link_hash_entry *) h;
7206 if (eh->adjust_done)
7207 return TRUE;
7208
7209 if (eh->elf.root.u.def.section == toc_inf->toc)
7210 {
7211 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7212 if (skip != (unsigned long) -1)
7213 eh->elf.root.u.def.value -= skip;
7214 else
7215 {
7216 (*_bfd_error_handler)
7217 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7218 eh->elf.root.u.def.section = &bfd_abs_section;
7219 eh->elf.root.u.def.value = 0;
7220 }
7221 eh->adjust_done = 1;
7222 }
7223 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7224 toc_inf->global_toc_syms = TRUE;
7225
7226 return TRUE;
7227 }
7228
7229 /* Examine all relocs referencing .toc sections in order to remove
7230 unused .toc entries. */
7231
7232 bfd_boolean
7233 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7234 {
7235 bfd *ibfd;
7236 struct adjust_toc_info toc_inf;
7237
7238 toc_inf.global_toc_syms = TRUE;
7239 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7240 {
7241 asection *toc, *sec;
7242 Elf_Internal_Shdr *symtab_hdr;
7243 Elf_Internal_Sym *local_syms;
7244 struct elf_link_hash_entry **sym_hashes;
7245 Elf_Internal_Rela *relstart, *rel;
7246 unsigned long *skip, *drop;
7247 unsigned char *used;
7248 unsigned char *keep, last, some_unused;
7249
7250 toc = bfd_get_section_by_name (ibfd, ".toc");
7251 if (toc == NULL
7252 || toc->size == 0
7253 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7254 || elf_discarded_section (toc))
7255 continue;
7256
7257 local_syms = NULL;
7258 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7259 sym_hashes = elf_sym_hashes (ibfd);
7260
7261 /* Look at sections dropped from the final link. */
7262 skip = NULL;
7263 relstart = NULL;
7264 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7265 {
7266 if (sec->reloc_count == 0
7267 || !elf_discarded_section (sec)
7268 || get_opd_info (sec)
7269 || (sec->flags & SEC_ALLOC) == 0
7270 || (sec->flags & SEC_DEBUGGING) != 0)
7271 continue;
7272
7273 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7274 if (relstart == NULL)
7275 goto error_ret;
7276
7277 /* Run through the relocs to see which toc entries might be
7278 unused. */
7279 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7280 {
7281 enum elf_ppc64_reloc_type r_type;
7282 unsigned long r_symndx;
7283 asection *sym_sec;
7284 struct elf_link_hash_entry *h;
7285 Elf_Internal_Sym *sym;
7286 bfd_vma val;
7287
7288 r_type = ELF64_R_TYPE (rel->r_info);
7289 switch (r_type)
7290 {
7291 default:
7292 continue;
7293
7294 case R_PPC64_TOC16:
7295 case R_PPC64_TOC16_LO:
7296 case R_PPC64_TOC16_HI:
7297 case R_PPC64_TOC16_HA:
7298 case R_PPC64_TOC16_DS:
7299 case R_PPC64_TOC16_LO_DS:
7300 break;
7301 }
7302
7303 r_symndx = ELF64_R_SYM (rel->r_info);
7304 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7305 r_symndx, ibfd))
7306 goto error_ret;
7307
7308 if (sym_sec != toc)
7309 continue;
7310
7311 if (h != NULL)
7312 val = h->root.u.def.value;
7313 else
7314 val = sym->st_value;
7315 val += rel->r_addend;
7316
7317 if (val >= toc->size)
7318 continue;
7319
7320 /* Anything in the toc ought to be aligned to 8 bytes.
7321 If not, don't mark as unused. */
7322 if (val & 7)
7323 continue;
7324
7325 if (skip == NULL)
7326 {
7327 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7328 if (skip == NULL)
7329 goto error_ret;
7330 }
7331
7332 skip[val >> 3] = 1;
7333 }
7334
7335 if (elf_section_data (sec)->relocs != relstart)
7336 free (relstart);
7337 }
7338
7339 if (skip == NULL)
7340 continue;
7341
7342 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7343 if (used == NULL)
7344 {
7345 error_ret:
7346 if (local_syms != NULL
7347 && symtab_hdr->contents != (unsigned char *) local_syms)
7348 free (local_syms);
7349 if (sec != NULL
7350 && relstart != NULL
7351 && elf_section_data (sec)->relocs != relstart)
7352 free (relstart);
7353 if (skip != NULL)
7354 free (skip);
7355 return FALSE;
7356 }
7357
7358 /* Now check all kept sections that might reference the toc.
7359 Check the toc itself last. */
7360 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7361 : ibfd->sections);
7362 sec != NULL;
7363 sec = (sec == toc ? NULL
7364 : sec->next == NULL ? toc
7365 : sec->next == toc && toc->next ? toc->next
7366 : sec->next))
7367 {
7368 int repeat;
7369
7370 if (sec->reloc_count == 0
7371 || elf_discarded_section (sec)
7372 || get_opd_info (sec)
7373 || (sec->flags & SEC_ALLOC) == 0
7374 || (sec->flags & SEC_DEBUGGING) != 0)
7375 continue;
7376
7377 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7378 if (relstart == NULL)
7379 goto error_ret;
7380
7381 /* Mark toc entries referenced as used. */
7382 repeat = 0;
7383 do
7384 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7385 {
7386 enum elf_ppc64_reloc_type r_type;
7387 unsigned long r_symndx;
7388 asection *sym_sec;
7389 struct elf_link_hash_entry *h;
7390 Elf_Internal_Sym *sym;
7391 bfd_vma val;
7392
7393 r_type = ELF64_R_TYPE (rel->r_info);
7394 switch (r_type)
7395 {
7396 case R_PPC64_TOC16:
7397 case R_PPC64_TOC16_LO:
7398 case R_PPC64_TOC16_HI:
7399 case R_PPC64_TOC16_HA:
7400 case R_PPC64_TOC16_DS:
7401 case R_PPC64_TOC16_LO_DS:
7402 /* In case we're taking addresses of toc entries. */
7403 case R_PPC64_ADDR64:
7404 break;
7405
7406 default:
7407 continue;
7408 }
7409
7410 r_symndx = ELF64_R_SYM (rel->r_info);
7411 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7412 r_symndx, ibfd))
7413 {
7414 free (used);
7415 goto error_ret;
7416 }
7417
7418 if (sym_sec != toc)
7419 continue;
7420
7421 if (h != NULL)
7422 val = h->root.u.def.value;
7423 else
7424 val = sym->st_value;
7425 val += rel->r_addend;
7426
7427 if (val >= toc->size)
7428 continue;
7429
7430 /* For the toc section, we only mark as used if
7431 this entry itself isn't unused. */
7432 if (sec == toc
7433 && !used[val >> 3]
7434 && (used[rel->r_offset >> 3]
7435 || !skip[rel->r_offset >> 3]))
7436 /* Do all the relocs again, to catch reference
7437 chains. */
7438 repeat = 1;
7439
7440 used[val >> 3] = 1;
7441 }
7442 while (repeat);
7443 }
7444
7445 /* Merge the used and skip arrays. Assume that TOC
7446 doublewords not appearing as either used or unused belong
7447 to to an entry more than one doubleword in size. */
7448 for (drop = skip, keep = used, last = 0, some_unused = 0;
7449 drop < skip + (toc->size + 7) / 8;
7450 ++drop, ++keep)
7451 {
7452 if (*keep)
7453 {
7454 *drop = 0;
7455 last = 0;
7456 }
7457 else if (*drop)
7458 {
7459 some_unused = 1;
7460 last = 1;
7461 }
7462 else
7463 *drop = last;
7464 }
7465
7466 free (used);
7467
7468 if (some_unused)
7469 {
7470 bfd_byte *contents, *src;
7471 unsigned long off;
7472
7473 /* Shuffle the toc contents, and at the same time convert the
7474 skip array from booleans into offsets. */
7475 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7476 goto error_ret;
7477
7478 elf_section_data (toc)->this_hdr.contents = contents;
7479
7480 for (src = contents, off = 0, drop = skip;
7481 src < contents + toc->size;
7482 src += 8, ++drop)
7483 {
7484 if (*drop)
7485 {
7486 *drop = (unsigned long) -1;
7487 off += 8;
7488 }
7489 else if (off != 0)
7490 {
7491 *drop = off;
7492 memcpy (src - off, src, 8);
7493 }
7494 }
7495 toc->rawsize = toc->size;
7496 toc->size = src - contents - off;
7497
7498 if (toc->reloc_count != 0)
7499 {
7500 Elf_Internal_Rela *wrel;
7501 bfd_size_type sz;
7502
7503 /* Read toc relocs. */
7504 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7505 TRUE);
7506 if (relstart == NULL)
7507 goto error_ret;
7508
7509 /* Remove unused toc relocs, and adjust those we keep. */
7510 wrel = relstart;
7511 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7512 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7513 {
7514 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7515 wrel->r_info = rel->r_info;
7516 wrel->r_addend = rel->r_addend;
7517 ++wrel;
7518 }
7519 else if (!dec_dynrel_count (rel->r_info, toc, info,
7520 &local_syms, NULL, NULL))
7521 goto error_ret;
7522
7523 toc->reloc_count = wrel - relstart;
7524 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7525 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7526 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7527 }
7528
7529 /* Adjust addends for relocs against the toc section sym. */
7530 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7531 {
7532 if (sec->reloc_count == 0
7533 || elf_discarded_section (sec))
7534 continue;
7535
7536 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7537 TRUE);
7538 if (relstart == NULL)
7539 goto error_ret;
7540
7541 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7542 {
7543 enum elf_ppc64_reloc_type r_type;
7544 unsigned long r_symndx;
7545 asection *sym_sec;
7546 struct elf_link_hash_entry *h;
7547 Elf_Internal_Sym *sym;
7548
7549 r_type = ELF64_R_TYPE (rel->r_info);
7550 switch (r_type)
7551 {
7552 default:
7553 continue;
7554
7555 case R_PPC64_TOC16:
7556 case R_PPC64_TOC16_LO:
7557 case R_PPC64_TOC16_HI:
7558 case R_PPC64_TOC16_HA:
7559 case R_PPC64_TOC16_DS:
7560 case R_PPC64_TOC16_LO_DS:
7561 case R_PPC64_ADDR64:
7562 break;
7563 }
7564
7565 r_symndx = ELF64_R_SYM (rel->r_info);
7566 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7567 r_symndx, ibfd))
7568 goto error_ret;
7569
7570 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7571 continue;
7572
7573 rel->r_addend -= skip[rel->r_addend >> 3];
7574 }
7575 }
7576
7577 /* We shouldn't have local or global symbols defined in the TOC,
7578 but handle them anyway. */
7579 if (local_syms != NULL)
7580 {
7581 Elf_Internal_Sym *sym;
7582
7583 for (sym = local_syms;
7584 sym < local_syms + symtab_hdr->sh_info;
7585 ++sym)
7586 if (sym->st_shndx != SHN_UNDEF
7587 && (sym->st_shndx < SHN_LORESERVE
7588 || sym->st_shndx > SHN_HIRESERVE)
7589 && sym->st_value != 0
7590 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7591 {
7592 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7593 sym->st_value -= skip[sym->st_value >> 3];
7594 else
7595 {
7596 (*_bfd_error_handler)
7597 (_("%s defined in removed toc entry"),
7598 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7599 NULL));
7600 sym->st_value = 0;
7601 sym->st_shndx = SHN_ABS;
7602 }
7603 symtab_hdr->contents = (unsigned char *) local_syms;
7604 }
7605 }
7606
7607 /* Finally, adjust any global syms defined in the toc. */
7608 if (toc_inf.global_toc_syms)
7609 {
7610 toc_inf.toc = toc;
7611 toc_inf.skip = skip;
7612 toc_inf.global_toc_syms = FALSE;
7613 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7614 &toc_inf);
7615 }
7616 }
7617
7618 if (local_syms != NULL
7619 && symtab_hdr->contents != (unsigned char *) local_syms)
7620 {
7621 if (!info->keep_memory)
7622 free (local_syms);
7623 else
7624 symtab_hdr->contents = (unsigned char *) local_syms;
7625 }
7626 free (skip);
7627 }
7628
7629 return TRUE;
7630 }
7631
7632 /* Allocate space in .plt, .got and associated reloc sections for
7633 dynamic relocs. */
7634
7635 static bfd_boolean
7636 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7637 {
7638 struct bfd_link_info *info;
7639 struct ppc_link_hash_table *htab;
7640 asection *s;
7641 struct ppc_link_hash_entry *eh;
7642 struct ppc_dyn_relocs *p;
7643 struct got_entry *gent;
7644
7645 if (h->root.type == bfd_link_hash_indirect)
7646 return TRUE;
7647
7648 if (h->root.type == bfd_link_hash_warning)
7649 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7650
7651 info = (struct bfd_link_info *) inf;
7652 htab = ppc_hash_table (info);
7653
7654 if (htab->elf.dynamic_sections_created
7655 && h->dynindx != -1
7656 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7657 {
7658 struct plt_entry *pent;
7659 bfd_boolean doneone = FALSE;
7660 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7661 if (pent->plt.refcount > 0)
7662 {
7663 /* If this is the first .plt entry, make room for the special
7664 first entry. */
7665 s = htab->plt;
7666 if (s->size == 0)
7667 s->size += PLT_INITIAL_ENTRY_SIZE;
7668
7669 pent->plt.offset = s->size;
7670
7671 /* Make room for this entry. */
7672 s->size += PLT_ENTRY_SIZE;
7673
7674 /* Make room for the .glink code. */
7675 s = htab->glink;
7676 if (s->size == 0)
7677 s->size += GLINK_CALL_STUB_SIZE;
7678 /* We need bigger stubs past index 32767. */
7679 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7680 s->size += 4;
7681 s->size += 2*4;
7682
7683 /* We also need to make an entry in the .rela.plt section. */
7684 s = htab->relplt;
7685 s->size += sizeof (Elf64_External_Rela);
7686 doneone = TRUE;
7687 }
7688 else
7689 pent->plt.offset = (bfd_vma) -1;
7690 if (!doneone)
7691 {
7692 h->plt.plist = NULL;
7693 h->needs_plt = 0;
7694 }
7695 }
7696 else
7697 {
7698 h->plt.plist = NULL;
7699 h->needs_plt = 0;
7700 }
7701
7702 eh = (struct ppc_link_hash_entry *) h;
7703 /* Run through the TLS GD got entries first if we're changing them
7704 to TPREL. */
7705 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7706 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7707 if (gent->got.refcount > 0
7708 && (gent->tls_type & TLS_GD) != 0)
7709 {
7710 /* This was a GD entry that has been converted to TPREL. If
7711 there happens to be a TPREL entry we can use that one. */
7712 struct got_entry *ent;
7713 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7714 if (ent->got.refcount > 0
7715 && (ent->tls_type & TLS_TPREL) != 0
7716 && ent->addend == gent->addend
7717 && ent->owner == gent->owner)
7718 {
7719 gent->got.refcount = 0;
7720 break;
7721 }
7722
7723 /* If not, then we'll be using our own TPREL entry. */
7724 if (gent->got.refcount != 0)
7725 gent->tls_type = TLS_TLS | TLS_TPREL;
7726 }
7727
7728 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7729 if (gent->got.refcount > 0)
7730 {
7731 bfd_boolean dyn;
7732
7733 /* Make sure this symbol is output as a dynamic symbol.
7734 Undefined weak syms won't yet be marked as dynamic,
7735 nor will all TLS symbols. */
7736 if (h->dynindx == -1
7737 && !h->forced_local)
7738 {
7739 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7740 return FALSE;
7741 }
7742
7743 if ((gent->tls_type & TLS_LD) != 0
7744 && !h->def_dynamic)
7745 {
7746 ppc64_tlsld_got (gent->owner)->refcount += 1;
7747 gent->got.offset = (bfd_vma) -1;
7748 continue;
7749 }
7750
7751 s = ppc64_elf_tdata (gent->owner)->got;
7752 gent->got.offset = s->size;
7753 s->size
7754 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7755 dyn = htab->elf.dynamic_sections_created;
7756 if ((info->shared
7757 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7758 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7759 || h->root.type != bfd_link_hash_undefweak))
7760 ppc64_elf_tdata (gent->owner)->relgot->size
7761 += (gent->tls_type & eh->tls_mask & TLS_GD
7762 ? 2 * sizeof (Elf64_External_Rela)
7763 : sizeof (Elf64_External_Rela));
7764 }
7765 else
7766 gent->got.offset = (bfd_vma) -1;
7767
7768 if (eh->dyn_relocs == NULL)
7769 return TRUE;
7770
7771 /* In the shared -Bsymbolic case, discard space allocated for
7772 dynamic pc-relative relocs against symbols which turn out to be
7773 defined in regular objects. For the normal shared case, discard
7774 space for relocs that have become local due to symbol visibility
7775 changes. */
7776
7777 if (info->shared)
7778 {
7779 /* Relocs that use pc_count are those that appear on a call insn,
7780 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7781 generated via assembly. We want calls to protected symbols to
7782 resolve directly to the function rather than going via the plt.
7783 If people want function pointer comparisons to work as expected
7784 then they should avoid writing weird assembly. */
7785 if (SYMBOL_CALLS_LOCAL (info, h))
7786 {
7787 struct ppc_dyn_relocs **pp;
7788
7789 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7790 {
7791 p->count -= p->pc_count;
7792 p->pc_count = 0;
7793 if (p->count == 0)
7794 *pp = p->next;
7795 else
7796 pp = &p->next;
7797 }
7798 }
7799
7800 /* Also discard relocs on undefined weak syms with non-default
7801 visibility. */
7802 if (eh->dyn_relocs != NULL
7803 && h->root.type == bfd_link_hash_undefweak)
7804 {
7805 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7806 eh->dyn_relocs = NULL;
7807
7808 /* Make sure this symbol is output as a dynamic symbol.
7809 Undefined weak syms won't yet be marked as dynamic. */
7810 else if (h->dynindx == -1
7811 && !h->forced_local)
7812 {
7813 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7814 return FALSE;
7815 }
7816 }
7817 }
7818 else if (ELIMINATE_COPY_RELOCS)
7819 {
7820 /* For the non-shared case, discard space for relocs against
7821 symbols which turn out to need copy relocs or are not
7822 dynamic. */
7823
7824 if (!h->non_got_ref
7825 && h->def_dynamic
7826 && !h->def_regular)
7827 {
7828 /* Make sure this symbol is output as a dynamic symbol.
7829 Undefined weak syms won't yet be marked as dynamic. */
7830 if (h->dynindx == -1
7831 && !h->forced_local)
7832 {
7833 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7834 return FALSE;
7835 }
7836
7837 /* If that succeeded, we know we'll be keeping all the
7838 relocs. */
7839 if (h->dynindx != -1)
7840 goto keep;
7841 }
7842
7843 eh->dyn_relocs = NULL;
7844
7845 keep: ;
7846 }
7847
7848 /* Finally, allocate space. */
7849 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7850 {
7851 asection *sreloc = elf_section_data (p->sec)->sreloc;
7852 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7853 }
7854
7855 return TRUE;
7856 }
7857
7858 /* Find any dynamic relocs that apply to read-only sections. */
7859
7860 static bfd_boolean
7861 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7862 {
7863 struct ppc_link_hash_entry *eh;
7864 struct ppc_dyn_relocs *p;
7865
7866 if (h->root.type == bfd_link_hash_warning)
7867 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7868
7869 eh = (struct ppc_link_hash_entry *) h;
7870 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7871 {
7872 asection *s = p->sec->output_section;
7873
7874 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7875 {
7876 struct bfd_link_info *info = inf;
7877
7878 info->flags |= DF_TEXTREL;
7879
7880 /* Not an error, just cut short the traversal. */
7881 return FALSE;
7882 }
7883 }
7884 return TRUE;
7885 }
7886
7887 /* Set the sizes of the dynamic sections. */
7888
7889 static bfd_boolean
7890 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7891 struct bfd_link_info *info)
7892 {
7893 struct ppc_link_hash_table *htab;
7894 bfd *dynobj;
7895 asection *s;
7896 bfd_boolean relocs;
7897 bfd *ibfd;
7898
7899 htab = ppc_hash_table (info);
7900 dynobj = htab->elf.dynobj;
7901 if (dynobj == NULL)
7902 abort ();
7903
7904 if (htab->elf.dynamic_sections_created)
7905 {
7906 /* Set the contents of the .interp section to the interpreter. */
7907 if (info->executable)
7908 {
7909 s = bfd_get_section_by_name (dynobj, ".interp");
7910 if (s == NULL)
7911 abort ();
7912 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7913 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7914 }
7915 }
7916
7917 /* Set up .got offsets for local syms, and space for local dynamic
7918 relocs. */
7919 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7920 {
7921 struct got_entry **lgot_ents;
7922 struct got_entry **end_lgot_ents;
7923 char *lgot_masks;
7924 bfd_size_type locsymcount;
7925 Elf_Internal_Shdr *symtab_hdr;
7926 asection *srel;
7927
7928 if (!is_ppc64_elf_target (ibfd->xvec))
7929 continue;
7930
7931 for (s = ibfd->sections; s != NULL; s = s->next)
7932 {
7933 struct ppc_dyn_relocs *p;
7934
7935 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7936 {
7937 if (!bfd_is_abs_section (p->sec)
7938 && bfd_is_abs_section (p->sec->output_section))
7939 {
7940 /* Input section has been discarded, either because
7941 it is a copy of a linkonce section or due to
7942 linker script /DISCARD/, so we'll be discarding
7943 the relocs too. */
7944 }
7945 else if (p->count != 0)
7946 {
7947 srel = elf_section_data (p->sec)->sreloc;
7948 srel->size += p->count * sizeof (Elf64_External_Rela);
7949 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7950 info->flags |= DF_TEXTREL;
7951 }
7952 }
7953 }
7954
7955 lgot_ents = elf_local_got_ents (ibfd);
7956 if (!lgot_ents)
7957 continue;
7958
7959 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7960 locsymcount = symtab_hdr->sh_info;
7961 end_lgot_ents = lgot_ents + locsymcount;
7962 lgot_masks = (char *) end_lgot_ents;
7963 s = ppc64_elf_tdata (ibfd)->got;
7964 srel = ppc64_elf_tdata (ibfd)->relgot;
7965 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7966 {
7967 struct got_entry *ent;
7968
7969 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7970 if (ent->got.refcount > 0)
7971 {
7972 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7973 {
7974 ppc64_tlsld_got (ibfd)->refcount += 1;
7975 ent->got.offset = (bfd_vma) -1;
7976 }
7977 else
7978 {
7979 ent->got.offset = s->size;
7980 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7981 {
7982 s->size += 16;
7983 if (info->shared)
7984 srel->size += 2 * sizeof (Elf64_External_Rela);
7985 }
7986 else
7987 {
7988 s->size += 8;
7989 if (info->shared)
7990 srel->size += sizeof (Elf64_External_Rela);
7991 }
7992 }
7993 }
7994 else
7995 ent->got.offset = (bfd_vma) -1;
7996 }
7997 }
7998
7999 /* Allocate global sym .plt and .got entries, and space for global
8000 sym dynamic relocs. */
8001 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8002
8003 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8004 {
8005 if (!is_ppc64_elf_target (ibfd->xvec))
8006 continue;
8007
8008 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8009 {
8010 s = ppc64_elf_tdata (ibfd)->got;
8011 ppc64_tlsld_got (ibfd)->offset = s->size;
8012 s->size += 16;
8013 if (info->shared)
8014 {
8015 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8016 srel->size += sizeof (Elf64_External_Rela);
8017 }
8018 }
8019 else
8020 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8021 }
8022
8023 /* We now have determined the sizes of the various dynamic sections.
8024 Allocate memory for them. */
8025 relocs = FALSE;
8026 for (s = dynobj->sections; s != NULL; s = s->next)
8027 {
8028 if ((s->flags & SEC_LINKER_CREATED) == 0)
8029 continue;
8030
8031 if (s == htab->brlt || s == htab->relbrlt)
8032 /* These haven't been allocated yet; don't strip. */
8033 continue;
8034 else if (s == htab->got
8035 || s == htab->plt
8036 || s == htab->glink
8037 || s == htab->dynbss)
8038 {
8039 /* Strip this section if we don't need it; see the
8040 comment below. */
8041 }
8042 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8043 {
8044 if (s->size != 0)
8045 {
8046 if (s != htab->relplt)
8047 relocs = TRUE;
8048
8049 /* We use the reloc_count field as a counter if we need
8050 to copy relocs into the output file. */
8051 s->reloc_count = 0;
8052 }
8053 }
8054 else
8055 {
8056 /* It's not one of our sections, so don't allocate space. */
8057 continue;
8058 }
8059
8060 if (s->size == 0)
8061 {
8062 /* If we don't need this section, strip it from the
8063 output file. This is mostly to handle .rela.bss and
8064 .rela.plt. We must create both sections in
8065 create_dynamic_sections, because they must be created
8066 before the linker maps input sections to output
8067 sections. The linker does that before
8068 adjust_dynamic_symbol is called, and it is that
8069 function which decides whether anything needs to go
8070 into these sections. */
8071 s->flags |= SEC_EXCLUDE;
8072 continue;
8073 }
8074
8075 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8076 continue;
8077
8078 /* Allocate memory for the section contents. We use bfd_zalloc
8079 here in case unused entries are not reclaimed before the
8080 section's contents are written out. This should not happen,
8081 but this way if it does we get a R_PPC64_NONE reloc in .rela
8082 sections instead of garbage.
8083 We also rely on the section contents being zero when writing
8084 the GOT. */
8085 s->contents = bfd_zalloc (dynobj, s->size);
8086 if (s->contents == NULL)
8087 return FALSE;
8088 }
8089
8090 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8091 {
8092 if (!is_ppc64_elf_target (ibfd->xvec))
8093 continue;
8094
8095 s = ppc64_elf_tdata (ibfd)->got;
8096 if (s != NULL && s != htab->got)
8097 {
8098 if (s->size == 0)
8099 s->flags |= SEC_EXCLUDE;
8100 else
8101 {
8102 s->contents = bfd_zalloc (ibfd, s->size);
8103 if (s->contents == NULL)
8104 return FALSE;
8105 }
8106 }
8107 s = ppc64_elf_tdata (ibfd)->relgot;
8108 if (s != NULL)
8109 {
8110 if (s->size == 0)
8111 s->flags |= SEC_EXCLUDE;
8112 else
8113 {
8114 s->contents = bfd_zalloc (ibfd, s->size);
8115 if (s->contents == NULL)
8116 return FALSE;
8117 relocs = TRUE;
8118 s->reloc_count = 0;
8119 }
8120 }
8121 }
8122
8123 if (htab->elf.dynamic_sections_created)
8124 {
8125 /* Add some entries to the .dynamic section. We fill in the
8126 values later, in ppc64_elf_finish_dynamic_sections, but we
8127 must add the entries now so that we get the correct size for
8128 the .dynamic section. The DT_DEBUG entry is filled in by the
8129 dynamic linker and used by the debugger. */
8130 #define add_dynamic_entry(TAG, VAL) \
8131 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8132
8133 if (info->executable)
8134 {
8135 if (!add_dynamic_entry (DT_DEBUG, 0))
8136 return FALSE;
8137 }
8138
8139 if (htab->plt != NULL && htab->plt->size != 0)
8140 {
8141 if (!add_dynamic_entry (DT_PLTGOT, 0)
8142 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8143 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8144 || !add_dynamic_entry (DT_JMPREL, 0)
8145 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8146 return FALSE;
8147 }
8148
8149 if (NO_OPD_RELOCS)
8150 {
8151 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8152 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8153 return FALSE;
8154 }
8155
8156 if (relocs)
8157 {
8158 if (!add_dynamic_entry (DT_RELA, 0)
8159 || !add_dynamic_entry (DT_RELASZ, 0)
8160 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8161 return FALSE;
8162
8163 /* If any dynamic relocs apply to a read-only section,
8164 then we need a DT_TEXTREL entry. */
8165 if ((info->flags & DF_TEXTREL) == 0)
8166 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8167
8168 if ((info->flags & DF_TEXTREL) != 0)
8169 {
8170 if (!add_dynamic_entry (DT_TEXTREL, 0))
8171 return FALSE;
8172 }
8173 }
8174 }
8175 #undef add_dynamic_entry
8176
8177 return TRUE;
8178 }
8179
8180 /* Determine the type of stub needed, if any, for a call. */
8181
8182 static inline enum ppc_stub_type
8183 ppc_type_of_stub (asection *input_sec,
8184 const Elf_Internal_Rela *rel,
8185 struct ppc_link_hash_entry **hash,
8186 bfd_vma destination)
8187 {
8188 struct ppc_link_hash_entry *h = *hash;
8189 bfd_vma location;
8190 bfd_vma branch_offset;
8191 bfd_vma max_branch_offset;
8192 enum elf_ppc64_reloc_type r_type;
8193
8194 if (h != NULL)
8195 {
8196 struct ppc_link_hash_entry *fdh = h;
8197 if (fdh->oh != NULL
8198 && fdh->oh->is_func_descriptor)
8199 fdh = fdh->oh;
8200
8201 if (fdh->elf.dynindx != -1)
8202 {
8203 struct plt_entry *ent;
8204
8205 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8206 if (ent->addend == rel->r_addend
8207 && ent->plt.offset != (bfd_vma) -1)
8208 {
8209 *hash = fdh;
8210 return ppc_stub_plt_call;
8211 }
8212 }
8213
8214 /* Here, we know we don't have a plt entry. If we don't have a
8215 either a defined function descriptor or a defined entry symbol
8216 in a regular object file, then it is pointless trying to make
8217 any other type of stub. */
8218 if (!((fdh->elf.root.type == bfd_link_hash_defined
8219 || fdh->elf.root.type == bfd_link_hash_defweak)
8220 && fdh->elf.root.u.def.section->output_section != NULL)
8221 && !((h->elf.root.type == bfd_link_hash_defined
8222 || h->elf.root.type == bfd_link_hash_defweak)
8223 && h->elf.root.u.def.section->output_section != NULL))
8224 return ppc_stub_none;
8225 }
8226
8227 /* Determine where the call point is. */
8228 location = (input_sec->output_offset
8229 + input_sec->output_section->vma
8230 + rel->r_offset);
8231
8232 branch_offset = destination - location;
8233 r_type = ELF64_R_TYPE (rel->r_info);
8234
8235 /* Determine if a long branch stub is needed. */
8236 max_branch_offset = 1 << 25;
8237 if (r_type != R_PPC64_REL24)
8238 max_branch_offset = 1 << 15;
8239
8240 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8241 /* We need a stub. Figure out whether a long_branch or plt_branch
8242 is needed later. */
8243 return ppc_stub_long_branch;
8244
8245 return ppc_stub_none;
8246 }
8247
8248 /* Build a .plt call stub. */
8249
8250 static inline bfd_byte *
8251 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8252 {
8253 #define PPC_LO(v) ((v) & 0xffff)
8254 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8255 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8256
8257 if (PPC_HA (offset) != 0)
8258 {
8259 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8260 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8261 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8262 if (PPC_HA (offset + 16) != PPC_HA (offset))
8263 {
8264 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8265 offset = 0;
8266 }
8267 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8268 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8269 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8270 bfd_put_32 (obfd, BCTR, p), p += 4;
8271 }
8272 else
8273 {
8274 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8275 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8276 if (PPC_HA (offset + 16) != PPC_HA (offset))
8277 {
8278 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8279 offset = 0;
8280 }
8281 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8282 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8283 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8284 bfd_put_32 (obfd, BCTR, p), p += 4;
8285 }
8286 return p;
8287 }
8288
8289 static bfd_boolean
8290 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8291 {
8292 struct ppc_stub_hash_entry *stub_entry;
8293 struct ppc_branch_hash_entry *br_entry;
8294 struct bfd_link_info *info;
8295 struct ppc_link_hash_table *htab;
8296 bfd_byte *loc;
8297 bfd_byte *p;
8298 unsigned int indx;
8299 struct plt_entry *ent;
8300 bfd_vma dest, off;
8301 int size;
8302
8303 /* Massage our args to the form they really have. */
8304 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8305 info = in_arg;
8306
8307 htab = ppc_hash_table (info);
8308
8309 /* Make a note of the offset within the stubs for this entry. */
8310 stub_entry->stub_offset = stub_entry->stub_sec->size;
8311 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8312
8313 htab->stub_count[stub_entry->stub_type - 1] += 1;
8314 switch (stub_entry->stub_type)
8315 {
8316 case ppc_stub_long_branch:
8317 case ppc_stub_long_branch_r2off:
8318 /* Branches are relative. This is where we are going to. */
8319 off = dest = (stub_entry->target_value
8320 + stub_entry->target_section->output_offset
8321 + stub_entry->target_section->output_section->vma);
8322
8323 /* And this is where we are coming from. */
8324 off -= (stub_entry->stub_offset
8325 + stub_entry->stub_sec->output_offset
8326 + stub_entry->stub_sec->output_section->vma);
8327
8328 size = 4;
8329 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8330 {
8331 bfd_vma r2off;
8332
8333 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8334 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8335 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8336 loc += 4;
8337 size = 12;
8338 if (PPC_HA (r2off) != 0)
8339 {
8340 size = 16;
8341 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8342 loc += 4;
8343 }
8344 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8345 loc += 4;
8346 off -= size - 4;
8347 }
8348 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8349
8350 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8351 {
8352 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8353 stub_entry->root.string);
8354 htab->stub_error = TRUE;
8355 return FALSE;
8356 }
8357
8358 if (info->emitrelocations)
8359 {
8360 Elf_Internal_Rela *relocs, *r;
8361 struct bfd_elf_section_data *elfsec_data;
8362
8363 elfsec_data = elf_section_data (stub_entry->stub_sec);
8364 relocs = elfsec_data->relocs;
8365 if (relocs == NULL)
8366 {
8367 bfd_size_type relsize;
8368 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8369 relocs = bfd_alloc (htab->stub_bfd, relsize);
8370 if (relocs == NULL)
8371 return FALSE;
8372 elfsec_data->relocs = relocs;
8373 elfsec_data->rel_hdr.sh_size = (stub_entry->stub_sec->reloc_count
8374 * sizeof (Elf64_External_Rela));
8375 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8376 stub_entry->stub_sec->reloc_count = 0;
8377 }
8378 r = relocs + stub_entry->stub_sec->reloc_count;
8379 stub_entry->stub_sec->reloc_count += 1;
8380 r->r_offset = loc - stub_entry->stub_sec->contents;
8381 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8382 r->r_addend = dest;
8383 if (stub_entry->h != NULL)
8384 {
8385 struct elf_link_hash_entry **hashes;
8386 unsigned long symndx;
8387 struct ppc_link_hash_entry *h;
8388
8389 hashes = elf_sym_hashes (htab->stub_bfd);
8390 if (hashes == NULL)
8391 {
8392 bfd_size_type hsize;
8393
8394 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8395 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8396 if (hashes == NULL)
8397 return FALSE;
8398 elf_sym_hashes (htab->stub_bfd) = hashes;
8399 htab->stub_globals = 1;
8400 }
8401 symndx = htab->stub_globals++;
8402 h = stub_entry->h;
8403 hashes[symndx] = &h->elf;
8404 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8405 if (h->oh != NULL && h->oh->is_func)
8406 h = h->oh;
8407 if (h->elf.root.u.def.section != stub_entry->target_section)
8408 /* H is an opd symbol. The addend must be zero. */
8409 r->r_addend = 0;
8410 else
8411 {
8412 off = (h->elf.root.u.def.value
8413 + h->elf.root.u.def.section->output_offset
8414 + h->elf.root.u.def.section->output_section->vma);
8415 r->r_addend -= off;
8416 }
8417 }
8418 }
8419 break;
8420
8421 case ppc_stub_plt_branch:
8422 case ppc_stub_plt_branch_r2off:
8423 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8424 stub_entry->root.string + 9,
8425 FALSE, FALSE);
8426 if (br_entry == NULL)
8427 {
8428 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8429 stub_entry->root.string);
8430 htab->stub_error = TRUE;
8431 return FALSE;
8432 }
8433
8434 off = (stub_entry->target_value
8435 + stub_entry->target_section->output_offset
8436 + stub_entry->target_section->output_section->vma);
8437
8438 bfd_put_64 (htab->brlt->owner, off,
8439 htab->brlt->contents + br_entry->offset);
8440
8441 if (br_entry->iter == htab->stub_iteration)
8442 {
8443 br_entry->iter = 0;
8444
8445 if (htab->relbrlt != NULL)
8446 {
8447 /* Create a reloc for the branch lookup table entry. */
8448 Elf_Internal_Rela rela;
8449 bfd_byte *rl;
8450
8451 rela.r_offset = (br_entry->offset
8452 + htab->brlt->output_offset
8453 + htab->brlt->output_section->vma);
8454 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8455 rela.r_addend = off;
8456
8457 rl = htab->relbrlt->contents;
8458 rl += (htab->relbrlt->reloc_count++
8459 * sizeof (Elf64_External_Rela));
8460 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8461 }
8462 else if (info->emitrelocations)
8463 {
8464 Elf_Internal_Rela *relocs, *r;
8465 struct bfd_elf_section_data *elfsec_data;
8466
8467 elfsec_data = elf_section_data (htab->brlt);
8468 relocs = elfsec_data->relocs;
8469 if (relocs == NULL)
8470 {
8471 bfd_size_type relsize;
8472 relsize = htab->brlt->reloc_count * sizeof (*relocs);
8473 relocs = bfd_alloc (htab->brlt->owner, relsize);
8474 if (relocs == NULL)
8475 return FALSE;
8476 elfsec_data->relocs = relocs;
8477 elfsec_data->rel_hdr.sh_size
8478 = (stub_entry->stub_sec->reloc_count
8479 * sizeof (Elf64_External_Rela));
8480 elfsec_data->rel_hdr.sh_entsize
8481 = sizeof (Elf64_External_Rela);
8482 htab->brlt->reloc_count = 0;
8483 }
8484 r = relocs + htab->brlt->reloc_count;
8485 htab->brlt->reloc_count += 1;
8486 r->r_offset = (br_entry->offset
8487 + htab->brlt->output_offset
8488 + htab->brlt->output_section->vma);
8489 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8490 r->r_addend = off;
8491 }
8492 }
8493
8494 off = (br_entry->offset
8495 + htab->brlt->output_offset
8496 + htab->brlt->output_section->vma
8497 - elf_gp (htab->brlt->output_section->owner)
8498 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8499
8500 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8501 {
8502 (*_bfd_error_handler)
8503 (_("linkage table error against `%s'"),
8504 stub_entry->root.string);
8505 bfd_set_error (bfd_error_bad_value);
8506 htab->stub_error = TRUE;
8507 return FALSE;
8508 }
8509
8510 indx = off;
8511 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8512 {
8513 if (PPC_HA (indx) != 0)
8514 {
8515 size = 16;
8516 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8517 loc += 4;
8518 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8519 }
8520 else
8521 {
8522 size = 12;
8523 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8524 }
8525 }
8526 else
8527 {
8528 bfd_vma r2off;
8529
8530 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8531 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8532 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8533 loc += 4;
8534 size = 20;
8535 if (PPC_HA (indx) != 0)
8536 {
8537 size += 4;
8538 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8539 loc += 4;
8540 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8541 loc += 4;
8542 }
8543 else
8544 {
8545 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8546 loc += 4;
8547 }
8548
8549 if (PPC_HA (r2off) != 0)
8550 {
8551 size += 4;
8552 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8553 loc += 4;
8554 }
8555 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8556 }
8557 loc += 4;
8558 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8559 loc += 4;
8560 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8561 break;
8562
8563 case ppc_stub_plt_call:
8564 /* Do the best we can for shared libraries built without
8565 exporting ".foo" for each "foo". This can happen when symbol
8566 versioning scripts strip all bar a subset of symbols. */
8567 if (stub_entry->h->oh != NULL
8568 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8569 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8570 {
8571 /* Point the symbol at the stub. There may be multiple stubs,
8572 we don't really care; The main thing is to make this sym
8573 defined somewhere. Maybe defining the symbol in the stub
8574 section is a silly idea. If we didn't do this, htab->top_id
8575 could disappear. */
8576 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8577 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8578 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8579 }
8580
8581 /* Now build the stub. */
8582 off = (bfd_vma) -1;
8583 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8584 if (ent->addend == stub_entry->addend)
8585 {
8586 off = ent->plt.offset;
8587 break;
8588 }
8589 if (off >= (bfd_vma) -2)
8590 abort ();
8591
8592 off &= ~ (bfd_vma) 1;
8593 off += (htab->plt->output_offset
8594 + htab->plt->output_section->vma
8595 - elf_gp (htab->plt->output_section->owner)
8596 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8597
8598 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8599 {
8600 (*_bfd_error_handler)
8601 (_("linkage table error against `%s'"),
8602 stub_entry->h->elf.root.root.string);
8603 bfd_set_error (bfd_error_bad_value);
8604 htab->stub_error = TRUE;
8605 return FALSE;
8606 }
8607
8608 p = build_plt_stub (htab->stub_bfd, loc, off);
8609 size = p - loc;
8610 break;
8611
8612 default:
8613 BFD_FAIL ();
8614 return FALSE;
8615 }
8616
8617 stub_entry->stub_sec->size += size;
8618
8619 if (htab->emit_stub_syms)
8620 {
8621 struct elf_link_hash_entry *h;
8622 size_t len1, len2;
8623 char *name;
8624 const char *const stub_str[] = { "long_branch",
8625 "long_branch_r2off",
8626 "plt_branch",
8627 "plt_branch_r2off",
8628 "plt_call" };
8629
8630 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8631 len2 = strlen (stub_entry->root.string);
8632 name = bfd_malloc (len1 + len2 + 2);
8633 if (name == NULL)
8634 return FALSE;
8635 memcpy (name, stub_entry->root.string, 9);
8636 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8637 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8638 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8639 if (h == NULL)
8640 return FALSE;
8641 if (h->root.type == bfd_link_hash_new)
8642 {
8643 h->root.type = bfd_link_hash_defined;
8644 h->root.u.def.section = stub_entry->stub_sec;
8645 h->root.u.def.value = stub_entry->stub_offset;
8646 h->ref_regular = 1;
8647 h->def_regular = 1;
8648 h->ref_regular_nonweak = 1;
8649 h->forced_local = 1;
8650 h->non_elf = 0;
8651 }
8652 }
8653
8654 return TRUE;
8655 }
8656
8657 /* As above, but don't actually build the stub. Just bump offset so
8658 we know stub section sizes, and select plt_branch stubs where
8659 long_branch stubs won't do. */
8660
8661 static bfd_boolean
8662 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8663 {
8664 struct ppc_stub_hash_entry *stub_entry;
8665 struct bfd_link_info *info;
8666 struct ppc_link_hash_table *htab;
8667 bfd_vma off;
8668 int size;
8669
8670 /* Massage our args to the form they really have. */
8671 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8672 info = in_arg;
8673
8674 htab = ppc_hash_table (info);
8675
8676 if (stub_entry->stub_type == ppc_stub_plt_call)
8677 {
8678 struct plt_entry *ent;
8679 off = (bfd_vma) -1;
8680 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8681 if (ent->addend == stub_entry->addend)
8682 {
8683 off = ent->plt.offset & ~(bfd_vma) 1;
8684 break;
8685 }
8686 if (off >= (bfd_vma) -2)
8687 abort ();
8688 off += (htab->plt->output_offset
8689 + htab->plt->output_section->vma
8690 - elf_gp (htab->plt->output_section->owner)
8691 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8692
8693 size = PLT_CALL_STUB_SIZE;
8694 if (PPC_HA (off) == 0)
8695 size -= 4;
8696 if (PPC_HA (off + 16) != PPC_HA (off))
8697 size += 4;
8698 }
8699 else
8700 {
8701 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8702 variants. */
8703 bfd_vma r2off = 0;
8704
8705 off = (stub_entry->target_value
8706 + stub_entry->target_section->output_offset
8707 + stub_entry->target_section->output_section->vma);
8708 off -= (stub_entry->stub_sec->size
8709 + stub_entry->stub_sec->output_offset
8710 + stub_entry->stub_sec->output_section->vma);
8711
8712 /* Reset the stub type from the plt variant in case we now
8713 can reach with a shorter stub. */
8714 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8715 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8716
8717 size = 4;
8718 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8719 {
8720 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8721 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8722 size = 12;
8723 if (PPC_HA (r2off) != 0)
8724 size = 16;
8725 off -= size - 4;
8726 }
8727
8728 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8729 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8730 {
8731 struct ppc_branch_hash_entry *br_entry;
8732 unsigned int indx;
8733
8734 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8735 stub_entry->root.string + 9,
8736 TRUE, FALSE);
8737 if (br_entry == NULL)
8738 {
8739 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8740 stub_entry->root.string);
8741 htab->stub_error = TRUE;
8742 return FALSE;
8743 }
8744
8745 if (br_entry->iter != htab->stub_iteration)
8746 {
8747 br_entry->iter = htab->stub_iteration;
8748 br_entry->offset = htab->brlt->size;
8749 htab->brlt->size += 8;
8750
8751 if (htab->relbrlt != NULL)
8752 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8753 else if (info->emitrelocations)
8754 {
8755 htab->brlt->reloc_count += 1;
8756 htab->brlt->flags |= SEC_RELOC;
8757 }
8758 }
8759
8760 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8761 off = (br_entry->offset
8762 + htab->brlt->output_offset
8763 + htab->brlt->output_section->vma
8764 - elf_gp (htab->brlt->output_section->owner)
8765 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8766
8767 indx = off;
8768 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8769 {
8770 size = 12;
8771 if (PPC_HA (indx) != 0)
8772 size = 16;
8773 }
8774 else
8775 {
8776 size = 20;
8777 if (PPC_HA (indx) != 0)
8778 size += 4;
8779
8780 if (PPC_HA (r2off) != 0)
8781 size += 4;
8782 }
8783 }
8784 else if (info->emitrelocations)
8785 {
8786 stub_entry->stub_sec->reloc_count += 1;
8787 stub_entry->stub_sec->flags |= SEC_RELOC;
8788 }
8789 }
8790
8791 stub_entry->stub_sec->size += size;
8792 return TRUE;
8793 }
8794
8795 /* Set up various things so that we can make a list of input sections
8796 for each output section included in the link. Returns -1 on error,
8797 0 when no stubs will be needed, and 1 on success. */
8798
8799 int
8800 ppc64_elf_setup_section_lists (bfd *output_bfd,
8801 struct bfd_link_info *info,
8802 int no_multi_toc)
8803 {
8804 bfd *input_bfd;
8805 int top_id, top_index, id;
8806 asection *section;
8807 asection **input_list;
8808 bfd_size_type amt;
8809 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8810
8811 htab->no_multi_toc = no_multi_toc;
8812
8813 if (htab->brlt == NULL)
8814 return 0;
8815
8816 /* Find the top input section id. */
8817 for (input_bfd = info->input_bfds, top_id = 3;
8818 input_bfd != NULL;
8819 input_bfd = input_bfd->link_next)
8820 {
8821 for (section = input_bfd->sections;
8822 section != NULL;
8823 section = section->next)
8824 {
8825 if (top_id < section->id)
8826 top_id = section->id;
8827 }
8828 }
8829
8830 htab->top_id = top_id;
8831 amt = sizeof (struct map_stub) * (top_id + 1);
8832 htab->stub_group = bfd_zmalloc (amt);
8833 if (htab->stub_group == NULL)
8834 return -1;
8835
8836 /* Set toc_off for com, und, abs and ind sections. */
8837 for (id = 0; id < 3; id++)
8838 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8839
8840 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8841
8842 /* We can't use output_bfd->section_count here to find the top output
8843 section index as some sections may have been removed, and
8844 strip_excluded_output_sections doesn't renumber the indices. */
8845 for (section = output_bfd->sections, top_index = 0;
8846 section != NULL;
8847 section = section->next)
8848 {
8849 if (top_index < section->index)
8850 top_index = section->index;
8851 }
8852
8853 htab->top_index = top_index;
8854 amt = sizeof (asection *) * (top_index + 1);
8855 input_list = bfd_zmalloc (amt);
8856 htab->input_list = input_list;
8857 if (input_list == NULL)
8858 return -1;
8859
8860 return 1;
8861 }
8862
8863 /* The linker repeatedly calls this function for each TOC input section
8864 and linker generated GOT section. Group input bfds such that the toc
8865 within a group is less than 64k in size. Will break with cute linker
8866 scripts that play games with dot in the output toc section. */
8867
8868 void
8869 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8870 {
8871 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8872
8873 if (!htab->no_multi_toc)
8874 {
8875 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8876 bfd_vma off = addr - htab->toc_curr;
8877
8878 if (off + isec->size > 0x10000)
8879 htab->toc_curr = addr;
8880
8881 elf_gp (isec->owner) = (htab->toc_curr
8882 - elf_gp (isec->output_section->owner)
8883 + TOC_BASE_OFF);
8884 }
8885 }
8886
8887 /* Called after the last call to the above function. */
8888
8889 void
8890 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8891 {
8892 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8893
8894 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8895
8896 /* toc_curr tracks the TOC offset used for code sections below in
8897 ppc64_elf_next_input_section. Start off at 0x8000. */
8898 htab->toc_curr = TOC_BASE_OFF;
8899 }
8900
8901 /* No toc references were found in ISEC. If the code in ISEC makes no
8902 calls, then there's no need to use toc adjusting stubs when branching
8903 into ISEC. Actually, indirect calls from ISEC are OK as they will
8904 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8905 needed, and 2 if a cyclical call-graph was found but no other reason
8906 for a stub was detected. If called from the top level, a return of
8907 2 means the same as a return of 0. */
8908
8909 static int
8910 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8911 {
8912 Elf_Internal_Rela *relstart, *rel;
8913 Elf_Internal_Sym *local_syms;
8914 int ret;
8915 struct ppc_link_hash_table *htab;
8916
8917 /* We know none of our code bearing sections will need toc stubs. */
8918 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8919 return 0;
8920
8921 if (isec->size == 0)
8922 return 0;
8923
8924 if (isec->output_section == NULL)
8925 return 0;
8926
8927 if (isec->reloc_count == 0)
8928 return 0;
8929
8930 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8931 info->keep_memory);
8932 if (relstart == NULL)
8933 return -1;
8934
8935 /* Look for branches to outside of this section. */
8936 local_syms = NULL;
8937 ret = 0;
8938 htab = ppc_hash_table (info);
8939 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8940 {
8941 enum elf_ppc64_reloc_type r_type;
8942 unsigned long r_symndx;
8943 struct elf_link_hash_entry *h;
8944 Elf_Internal_Sym *sym;
8945 asection *sym_sec;
8946 struct _opd_sec_data *opd;
8947 bfd_vma sym_value;
8948 bfd_vma dest;
8949
8950 r_type = ELF64_R_TYPE (rel->r_info);
8951 if (r_type != R_PPC64_REL24
8952 && r_type != R_PPC64_REL14
8953 && r_type != R_PPC64_REL14_BRTAKEN
8954 && r_type != R_PPC64_REL14_BRNTAKEN)
8955 continue;
8956
8957 r_symndx = ELF64_R_SYM (rel->r_info);
8958 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8959 isec->owner))
8960 {
8961 ret = -1;
8962 break;
8963 }
8964
8965 /* Calls to dynamic lib functions go through a plt call stub
8966 that uses r2. Branches to undefined symbols might be a call
8967 using old-style dot symbols that can be satisfied by a plt
8968 call into a new-style dynamic library. */
8969 if (sym_sec == NULL)
8970 {
8971 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8972 if (eh != NULL
8973 && eh->oh != NULL
8974 && eh->oh->elf.plt.plist != NULL)
8975 {
8976 ret = 1;
8977 break;
8978 }
8979
8980 /* Ignore other undefined symbols. */
8981 continue;
8982 }
8983
8984 /* Assume branches to other sections not included in the link need
8985 stubs too, to cover -R and absolute syms. */
8986 if (sym_sec->output_section == NULL)
8987 {
8988 ret = 1;
8989 break;
8990 }
8991
8992 if (h == NULL)
8993 sym_value = sym->st_value;
8994 else
8995 {
8996 if (h->root.type != bfd_link_hash_defined
8997 && h->root.type != bfd_link_hash_defweak)
8998 abort ();
8999 sym_value = h->root.u.def.value;
9000 }
9001 sym_value += rel->r_addend;
9002
9003 /* If this branch reloc uses an opd sym, find the code section. */
9004 opd = get_opd_info (sym_sec);
9005 if (opd != NULL)
9006 {
9007 if (h == NULL && opd->adjust != NULL)
9008 {
9009 long adjust;
9010
9011 adjust = opd->adjust[sym->st_value / 8];
9012 if (adjust == -1)
9013 /* Assume deleted functions won't ever be called. */
9014 continue;
9015 sym_value += adjust;
9016 }
9017
9018 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9019 if (dest == (bfd_vma) -1)
9020 continue;
9021 }
9022 else
9023 dest = (sym_value
9024 + sym_sec->output_offset
9025 + sym_sec->output_section->vma);
9026
9027 /* Ignore branch to self. */
9028 if (sym_sec == isec)
9029 continue;
9030
9031 /* If the called function uses the toc, we need a stub. */
9032 if (sym_sec->has_toc_reloc
9033 || sym_sec->makes_toc_func_call)
9034 {
9035 ret = 1;
9036 break;
9037 }
9038
9039 /* Assume any branch that needs a long branch stub might in fact
9040 need a plt_branch stub. A plt_branch stub uses r2. */
9041 else if (dest - (isec->output_offset
9042 + isec->output_section->vma
9043 + rel->r_offset) + (1 << 25) >= (2 << 25))
9044 {
9045 ret = 1;
9046 break;
9047 }
9048
9049 /* If calling back to a section in the process of being tested, we
9050 can't say for sure that no toc adjusting stubs are needed, so
9051 don't return zero. */
9052 else if (sym_sec->call_check_in_progress)
9053 ret = 2;
9054
9055 /* Branches to another section that itself doesn't have any TOC
9056 references are OK. Recursively call ourselves to check. */
9057 else if (sym_sec->id <= htab->top_id
9058 && htab->stub_group[sym_sec->id].toc_off == 0)
9059 {
9060 int recur;
9061
9062 /* Mark current section as indeterminate, so that other
9063 sections that call back to current won't be marked as
9064 known. */
9065 isec->call_check_in_progress = 1;
9066 recur = toc_adjusting_stub_needed (info, sym_sec);
9067 isec->call_check_in_progress = 0;
9068
9069 if (recur < 0)
9070 {
9071 /* An error. Exit. */
9072 ret = -1;
9073 break;
9074 }
9075 else if (recur <= 1)
9076 {
9077 /* Known result. Mark as checked and set section flag. */
9078 htab->stub_group[sym_sec->id].toc_off = 1;
9079 if (recur != 0)
9080 {
9081 sym_sec->makes_toc_func_call = 1;
9082 ret = 1;
9083 break;
9084 }
9085 }
9086 else
9087 {
9088 /* Unknown result. Continue checking. */
9089 ret = 2;
9090 }
9091 }
9092 }
9093
9094 if (local_syms != NULL
9095 && (elf_tdata (isec->owner)->symtab_hdr.contents
9096 != (unsigned char *) local_syms))
9097 free (local_syms);
9098 if (elf_section_data (isec)->relocs != relstart)
9099 free (relstart);
9100
9101 return ret;
9102 }
9103
9104 /* The linker repeatedly calls this function for each input section,
9105 in the order that input sections are linked into output sections.
9106 Build lists of input sections to determine groupings between which
9107 we may insert linker stubs. */
9108
9109 bfd_boolean
9110 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9111 {
9112 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9113
9114 if ((isec->output_section->flags & SEC_CODE) != 0
9115 && isec->output_section->index <= htab->top_index)
9116 {
9117 asection **list = htab->input_list + isec->output_section->index;
9118 /* Steal the link_sec pointer for our list. */
9119 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9120 /* This happens to make the list in reverse order,
9121 which is what we want. */
9122 PREV_SEC (isec) = *list;
9123 *list = isec;
9124 }
9125
9126 if (htab->multi_toc_needed)
9127 {
9128 /* If a code section has a function that uses the TOC then we need
9129 to use the right TOC (obviously). Also, make sure that .opd gets
9130 the correct TOC value for R_PPC64_TOC relocs that don't have or
9131 can't find their function symbol (shouldn't ever happen now).
9132 Also specially treat .fixup for the linux kernel. .fixup
9133 contains branches, but only back to the function that hit an
9134 exception. */
9135 if (isec->has_toc_reloc
9136 || (isec->flags & SEC_CODE) == 0
9137 || strcmp (isec->name, ".fixup") == 0)
9138 {
9139 if (elf_gp (isec->owner) != 0)
9140 htab->toc_curr = elf_gp (isec->owner);
9141 }
9142 else if (htab->stub_group[isec->id].toc_off == 0)
9143 {
9144 int ret = toc_adjusting_stub_needed (info, isec);
9145 if (ret < 0)
9146 return FALSE;
9147 else
9148 isec->makes_toc_func_call = ret & 1;
9149 }
9150 }
9151
9152 /* Functions that don't use the TOC can belong in any TOC group.
9153 Use the last TOC base. This happens to make _init and _fini
9154 pasting work. */
9155 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9156 return TRUE;
9157 }
9158
9159 /* See whether we can group stub sections together. Grouping stub
9160 sections may result in fewer stubs. More importantly, we need to
9161 put all .init* and .fini* stubs at the beginning of the .init or
9162 .fini output sections respectively, because glibc splits the
9163 _init and _fini functions into multiple parts. Putting a stub in
9164 the middle of a function is not a good idea. */
9165
9166 static void
9167 group_sections (struct ppc_link_hash_table *htab,
9168 bfd_size_type stub_group_size,
9169 bfd_boolean stubs_always_before_branch)
9170 {
9171 asection **list;
9172 bfd_size_type stub14_group_size;
9173 bfd_boolean suppress_size_errors;
9174
9175 suppress_size_errors = FALSE;
9176 stub14_group_size = stub_group_size;
9177 if (stub_group_size == 1)
9178 {
9179 /* Default values. */
9180 if (stubs_always_before_branch)
9181 {
9182 stub_group_size = 0x1e00000;
9183 stub14_group_size = 0x7800;
9184 }
9185 else
9186 {
9187 stub_group_size = 0x1c00000;
9188 stub14_group_size = 0x7000;
9189 }
9190 suppress_size_errors = TRUE;
9191 }
9192
9193 list = htab->input_list + htab->top_index;
9194 do
9195 {
9196 asection *tail = *list;
9197 while (tail != NULL)
9198 {
9199 asection *curr;
9200 asection *prev;
9201 bfd_size_type total;
9202 bfd_boolean big_sec;
9203 bfd_vma curr_toc;
9204
9205 curr = tail;
9206 total = tail->size;
9207 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9208 ? stub14_group_size : stub_group_size);
9209 if (big_sec && !suppress_size_errors)
9210 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9211 tail->owner, tail);
9212 curr_toc = htab->stub_group[tail->id].toc_off;
9213
9214 while ((prev = PREV_SEC (curr)) != NULL
9215 && ((total += curr->output_offset - prev->output_offset)
9216 < (ppc64_elf_section_data (prev)->has_14bit_branch
9217 ? stub14_group_size : stub_group_size))
9218 && htab->stub_group[prev->id].toc_off == curr_toc)
9219 curr = prev;
9220
9221 /* OK, the size from the start of CURR to the end is less
9222 than stub_group_size and thus can be handled by one stub
9223 section. (or the tail section is itself larger than
9224 stub_group_size, in which case we may be toast.) We
9225 should really be keeping track of the total size of stubs
9226 added here, as stubs contribute to the final output
9227 section size. That's a little tricky, and this way will
9228 only break if stubs added make the total size more than
9229 2^25, ie. for the default stub_group_size, if stubs total
9230 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9231 do
9232 {
9233 prev = PREV_SEC (tail);
9234 /* Set up this stub group. */
9235 htab->stub_group[tail->id].link_sec = curr;
9236 }
9237 while (tail != curr && (tail = prev) != NULL);
9238
9239 /* But wait, there's more! Input sections up to stub_group_size
9240 bytes before the stub section can be handled by it too.
9241 Don't do this if we have a really large section after the
9242 stubs, as adding more stubs increases the chance that
9243 branches may not reach into the stub section. */
9244 if (!stubs_always_before_branch && !big_sec)
9245 {
9246 total = 0;
9247 while (prev != NULL
9248 && ((total += tail->output_offset - prev->output_offset)
9249 < (ppc64_elf_section_data (prev)->has_14bit_branch
9250 ? stub14_group_size : stub_group_size))
9251 && htab->stub_group[prev->id].toc_off == curr_toc)
9252 {
9253 tail = prev;
9254 prev = PREV_SEC (tail);
9255 htab->stub_group[tail->id].link_sec = curr;
9256 }
9257 }
9258 tail = prev;
9259 }
9260 }
9261 while (list-- != htab->input_list);
9262 free (htab->input_list);
9263 #undef PREV_SEC
9264 }
9265
9266 /* Determine and set the size of the stub section for a final link.
9267
9268 The basic idea here is to examine all the relocations looking for
9269 PC-relative calls to a target that is unreachable with a "bl"
9270 instruction. */
9271
9272 bfd_boolean
9273 ppc64_elf_size_stubs (bfd *output_bfd,
9274 struct bfd_link_info *info,
9275 bfd_signed_vma group_size,
9276 asection *(*add_stub_section) (const char *, asection *),
9277 void (*layout_sections_again) (void))
9278 {
9279 bfd_size_type stub_group_size;
9280 bfd_boolean stubs_always_before_branch;
9281 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9282
9283 /* Stash our params away. */
9284 htab->add_stub_section = add_stub_section;
9285 htab->layout_sections_again = layout_sections_again;
9286 stubs_always_before_branch = group_size < 0;
9287 if (group_size < 0)
9288 stub_group_size = -group_size;
9289 else
9290 stub_group_size = group_size;
9291
9292 group_sections (htab, stub_group_size, stubs_always_before_branch);
9293
9294 while (1)
9295 {
9296 bfd *input_bfd;
9297 unsigned int bfd_indx;
9298 asection *stub_sec;
9299
9300 htab->stub_iteration += 1;
9301
9302 for (input_bfd = info->input_bfds, bfd_indx = 0;
9303 input_bfd != NULL;
9304 input_bfd = input_bfd->link_next, bfd_indx++)
9305 {
9306 Elf_Internal_Shdr *symtab_hdr;
9307 asection *section;
9308 Elf_Internal_Sym *local_syms = NULL;
9309
9310 if (!is_ppc64_elf_target (input_bfd->xvec))
9311 continue;
9312
9313 /* We'll need the symbol table in a second. */
9314 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9315 if (symtab_hdr->sh_info == 0)
9316 continue;
9317
9318 /* Walk over each section attached to the input bfd. */
9319 for (section = input_bfd->sections;
9320 section != NULL;
9321 section = section->next)
9322 {
9323 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9324
9325 /* If there aren't any relocs, then there's nothing more
9326 to do. */
9327 if ((section->flags & SEC_RELOC) == 0
9328 || (section->flags & SEC_ALLOC) == 0
9329 || (section->flags & SEC_LOAD) == 0
9330 || (section->flags & SEC_CODE) == 0
9331 || section->reloc_count == 0)
9332 continue;
9333
9334 /* If this section is a link-once section that will be
9335 discarded, then don't create any stubs. */
9336 if (section->output_section == NULL
9337 || section->output_section->owner != output_bfd)
9338 continue;
9339
9340 /* Get the relocs. */
9341 internal_relocs
9342 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9343 info->keep_memory);
9344 if (internal_relocs == NULL)
9345 goto error_ret_free_local;
9346
9347 /* Now examine each relocation. */
9348 irela = internal_relocs;
9349 irelaend = irela + section->reloc_count;
9350 for (; irela < irelaend; irela++)
9351 {
9352 enum elf_ppc64_reloc_type r_type;
9353 unsigned int r_indx;
9354 enum ppc_stub_type stub_type;
9355 struct ppc_stub_hash_entry *stub_entry;
9356 asection *sym_sec, *code_sec;
9357 bfd_vma sym_value;
9358 bfd_vma destination;
9359 bfd_boolean ok_dest;
9360 struct ppc_link_hash_entry *hash;
9361 struct ppc_link_hash_entry *fdh;
9362 struct elf_link_hash_entry *h;
9363 Elf_Internal_Sym *sym;
9364 char *stub_name;
9365 const asection *id_sec;
9366 struct _opd_sec_data *opd;
9367
9368 r_type = ELF64_R_TYPE (irela->r_info);
9369 r_indx = ELF64_R_SYM (irela->r_info);
9370
9371 if (r_type >= R_PPC64_max)
9372 {
9373 bfd_set_error (bfd_error_bad_value);
9374 goto error_ret_free_internal;
9375 }
9376
9377 /* Only look for stubs on branch instructions. */
9378 if (r_type != R_PPC64_REL24
9379 && r_type != R_PPC64_REL14
9380 && r_type != R_PPC64_REL14_BRTAKEN
9381 && r_type != R_PPC64_REL14_BRNTAKEN)
9382 continue;
9383
9384 /* Now determine the call target, its name, value,
9385 section. */
9386 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9387 r_indx, input_bfd))
9388 goto error_ret_free_internal;
9389 hash = (struct ppc_link_hash_entry *) h;
9390
9391 ok_dest = FALSE;
9392 fdh = NULL;
9393 sym_value = 0;
9394 if (hash == NULL)
9395 {
9396 sym_value = sym->st_value;
9397 ok_dest = TRUE;
9398 }
9399 else if (hash->elf.root.type == bfd_link_hash_defined
9400 || hash->elf.root.type == bfd_link_hash_defweak)
9401 {
9402 sym_value = hash->elf.root.u.def.value;
9403 if (sym_sec->output_section != NULL)
9404 ok_dest = TRUE;
9405 }
9406 else if (hash->elf.root.type == bfd_link_hash_undefweak
9407 || hash->elf.root.type == bfd_link_hash_undefined)
9408 {
9409 /* Recognise an old ABI func code entry sym, and
9410 use the func descriptor sym instead if it is
9411 defined. */
9412 if (hash->elf.root.root.string[0] == '.'
9413 && (fdh = get_fdh (hash, htab)) != NULL)
9414 {
9415 if (fdh->elf.root.type == bfd_link_hash_defined
9416 || fdh->elf.root.type == bfd_link_hash_defweak)
9417 {
9418 sym_sec = fdh->elf.root.u.def.section;
9419 sym_value = fdh->elf.root.u.def.value;
9420 if (sym_sec->output_section != NULL)
9421 ok_dest = TRUE;
9422 }
9423 else
9424 fdh = NULL;
9425 }
9426 }
9427 else
9428 {
9429 bfd_set_error (bfd_error_bad_value);
9430 goto error_ret_free_internal;
9431 }
9432
9433 destination = 0;
9434 if (ok_dest)
9435 {
9436 sym_value += irela->r_addend;
9437 destination = (sym_value
9438 + sym_sec->output_offset
9439 + sym_sec->output_section->vma);
9440 }
9441
9442 code_sec = sym_sec;
9443 opd = get_opd_info (sym_sec);
9444 if (opd != NULL)
9445 {
9446 bfd_vma dest;
9447
9448 if (hash == NULL && opd->adjust != NULL)
9449 {
9450 long adjust = opd->adjust[sym_value / 8];
9451 if (adjust == -1)
9452 continue;
9453 sym_value += adjust;
9454 }
9455 dest = opd_entry_value (sym_sec, sym_value,
9456 &code_sec, &sym_value);
9457 if (dest != (bfd_vma) -1)
9458 {
9459 destination = dest;
9460 if (fdh != NULL)
9461 {
9462 /* Fixup old ABI sym to point at code
9463 entry. */
9464 hash->elf.root.type = bfd_link_hash_defweak;
9465 hash->elf.root.u.def.section = code_sec;
9466 hash->elf.root.u.def.value = sym_value;
9467 }
9468 }
9469 }
9470
9471 /* Determine what (if any) linker stub is needed. */
9472 stub_type = ppc_type_of_stub (section, irela, &hash,
9473 destination);
9474
9475 if (stub_type != ppc_stub_plt_call)
9476 {
9477 /* Check whether we need a TOC adjusting stub.
9478 Since the linker pastes together pieces from
9479 different object files when creating the
9480 _init and _fini functions, it may be that a
9481 call to what looks like a local sym is in
9482 fact a call needing a TOC adjustment. */
9483 if (code_sec != NULL
9484 && code_sec->output_section != NULL
9485 && (htab->stub_group[code_sec->id].toc_off
9486 != htab->stub_group[section->id].toc_off)
9487 && (code_sec->has_toc_reloc
9488 || code_sec->makes_toc_func_call))
9489 stub_type = ppc_stub_long_branch_r2off;
9490 }
9491
9492 if (stub_type == ppc_stub_none)
9493 continue;
9494
9495 /* __tls_get_addr calls might be eliminated. */
9496 if (stub_type != ppc_stub_plt_call
9497 && hash != NULL
9498 && (hash == htab->tls_get_addr
9499 || hash == htab->tls_get_addr_fd)
9500 && section->has_tls_reloc
9501 && irela != internal_relocs)
9502 {
9503 /* Get tls info. */
9504 char *tls_mask;
9505
9506 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9507 irela - 1, input_bfd))
9508 goto error_ret_free_internal;
9509 if (*tls_mask != 0)
9510 continue;
9511 }
9512
9513 /* Support for grouping stub sections. */
9514 id_sec = htab->stub_group[section->id].link_sec;
9515
9516 /* Get the name of this stub. */
9517 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9518 if (!stub_name)
9519 goto error_ret_free_internal;
9520
9521 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9522 stub_name, FALSE, FALSE);
9523 if (stub_entry != NULL)
9524 {
9525 /* The proper stub has already been created. */
9526 free (stub_name);
9527 continue;
9528 }
9529
9530 stub_entry = ppc_add_stub (stub_name, section, htab);
9531 if (stub_entry == NULL)
9532 {
9533 free (stub_name);
9534 error_ret_free_internal:
9535 if (elf_section_data (section)->relocs == NULL)
9536 free (internal_relocs);
9537 error_ret_free_local:
9538 if (local_syms != NULL
9539 && (symtab_hdr->contents
9540 != (unsigned char *) local_syms))
9541 free (local_syms);
9542 return FALSE;
9543 }
9544
9545 stub_entry->stub_type = stub_type;
9546 stub_entry->target_value = sym_value;
9547 stub_entry->target_section = code_sec;
9548 stub_entry->h = hash;
9549 stub_entry->addend = irela->r_addend;
9550
9551 if (stub_entry->h != NULL)
9552 htab->stub_globals += 1;
9553 }
9554
9555 /* We're done with the internal relocs, free them. */
9556 if (elf_section_data (section)->relocs != internal_relocs)
9557 free (internal_relocs);
9558 }
9559
9560 if (local_syms != NULL
9561 && symtab_hdr->contents != (unsigned char *) local_syms)
9562 {
9563 if (!info->keep_memory)
9564 free (local_syms);
9565 else
9566 symtab_hdr->contents = (unsigned char *) local_syms;
9567 }
9568 }
9569
9570 /* We may have added some stubs. Find out the new size of the
9571 stub sections. */
9572 for (stub_sec = htab->stub_bfd->sections;
9573 stub_sec != NULL;
9574 stub_sec = stub_sec->next)
9575 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9576 {
9577 stub_sec->rawsize = stub_sec->size;
9578 stub_sec->size = 0;
9579 stub_sec->reloc_count = 0;
9580 stub_sec->flags &= ~SEC_RELOC;
9581 }
9582
9583 htab->brlt->size = 0;
9584 htab->brlt->reloc_count = 0;
9585 htab->brlt->flags &= ~SEC_RELOC;
9586 if (htab->relbrlt != NULL)
9587 htab->relbrlt->size = 0;
9588
9589 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9590
9591 for (stub_sec = htab->stub_bfd->sections;
9592 stub_sec != NULL;
9593 stub_sec = stub_sec->next)
9594 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9595 && stub_sec->rawsize != stub_sec->size)
9596 break;
9597
9598 /* Exit from this loop when no stubs have been added, and no stubs
9599 have changed size. */
9600 if (stub_sec == NULL)
9601 break;
9602
9603 /* Ask the linker to do its stuff. */
9604 (*htab->layout_sections_again) ();
9605 }
9606
9607 /* It would be nice to strip htab->brlt from the output if the
9608 section is empty, but it's too late. If we strip sections here,
9609 the dynamic symbol table is corrupted since the section symbol
9610 for the stripped section isn't written. */
9611
9612 return TRUE;
9613 }
9614
9615 /* Called after we have determined section placement. If sections
9616 move, we'll be called again. Provide a value for TOCstart. */
9617
9618 bfd_vma
9619 ppc64_elf_toc (bfd *obfd)
9620 {
9621 asection *s;
9622 bfd_vma TOCstart;
9623
9624 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9625 order. The TOC starts where the first of these sections starts. */
9626 s = bfd_get_section_by_name (obfd, ".got");
9627 if (s == NULL)
9628 s = bfd_get_section_by_name (obfd, ".toc");
9629 if (s == NULL)
9630 s = bfd_get_section_by_name (obfd, ".tocbss");
9631 if (s == NULL)
9632 s = bfd_get_section_by_name (obfd, ".plt");
9633 if (s == NULL)
9634 {
9635 /* This may happen for
9636 o references to TOC base (SYM@toc / TOC[tc0]) without a
9637 .toc directive
9638 o bad linker script
9639 o --gc-sections and empty TOC sections
9640
9641 FIXME: Warn user? */
9642
9643 /* Look for a likely section. We probably won't even be
9644 using TOCstart. */
9645 for (s = obfd->sections; s != NULL; s = s->next)
9646 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9647 == (SEC_ALLOC | SEC_SMALL_DATA))
9648 break;
9649 if (s == NULL)
9650 for (s = obfd->sections; s != NULL; s = s->next)
9651 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9652 == (SEC_ALLOC | SEC_SMALL_DATA))
9653 break;
9654 if (s == NULL)
9655 for (s = obfd->sections; s != NULL; s = s->next)
9656 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9657 break;
9658 if (s == NULL)
9659 for (s = obfd->sections; s != NULL; s = s->next)
9660 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9661 break;
9662 }
9663
9664 TOCstart = 0;
9665 if (s != NULL)
9666 TOCstart = s->output_section->vma + s->output_offset;
9667
9668 return TOCstart;
9669 }
9670
9671 /* Build all the stubs associated with the current output file.
9672 The stubs are kept in a hash table attached to the main linker
9673 hash table. This function is called via gldelf64ppc_finish. */
9674
9675 bfd_boolean
9676 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9677 struct bfd_link_info *info,
9678 char **stats)
9679 {
9680 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9681 asection *stub_sec;
9682 bfd_byte *p;
9683 int stub_sec_count = 0;
9684
9685 htab->emit_stub_syms = emit_stub_syms;
9686
9687 /* Allocate memory to hold the linker stubs. */
9688 for (stub_sec = htab->stub_bfd->sections;
9689 stub_sec != NULL;
9690 stub_sec = stub_sec->next)
9691 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9692 && stub_sec->size != 0)
9693 {
9694 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9695 if (stub_sec->contents == NULL)
9696 return FALSE;
9697 /* We want to check that built size is the same as calculated
9698 size. rawsize is a convenient location to use. */
9699 stub_sec->rawsize = stub_sec->size;
9700 stub_sec->size = 0;
9701 }
9702
9703 if (htab->glink != NULL && htab->glink->size != 0)
9704 {
9705 unsigned int indx;
9706 bfd_vma plt0;
9707
9708 /* Build the .glink plt call stub. */
9709 if (htab->emit_stub_syms)
9710 {
9711 struct elf_link_hash_entry *h;
9712 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9713 if (h == NULL)
9714 return FALSE;
9715 if (h->root.type == bfd_link_hash_new)
9716 {
9717 h->root.type = bfd_link_hash_defined;
9718 h->root.u.def.section = htab->glink;
9719 h->root.u.def.value = 8;
9720 h->ref_regular = 1;
9721 h->def_regular = 1;
9722 h->ref_regular_nonweak = 1;
9723 h->forced_local = 1;
9724 h->non_elf = 0;
9725 }
9726 }
9727 p = htab->glink->contents;
9728 plt0 = (htab->plt->output_section->vma
9729 + htab->plt->output_offset
9730 - (htab->glink->output_section->vma
9731 + htab->glink->output_offset
9732 + 16));
9733 bfd_put_64 (htab->glink->owner, plt0, p);
9734 p += 8;
9735 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9736 p += 4;
9737 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9738 p += 4;
9739 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9740 p += 4;
9741 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9742 p += 4;
9743 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9744 p += 4;
9745 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9746 p += 4;
9747 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9748 p += 4;
9749 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9750 p += 4;
9751 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9752 p += 4;
9753 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9754 p += 4;
9755 bfd_put_32 (htab->glink->owner, BCTR, p);
9756 p += 4;
9757 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9758 {
9759 bfd_put_32 (htab->glink->owner, NOP, p);
9760 p += 4;
9761 }
9762
9763 /* Build the .glink lazy link call stubs. */
9764 indx = 0;
9765 while (p < htab->glink->contents + htab->glink->size)
9766 {
9767 if (indx < 0x8000)
9768 {
9769 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9770 p += 4;
9771 }
9772 else
9773 {
9774 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9775 p += 4;
9776 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9777 p += 4;
9778 }
9779 bfd_put_32 (htab->glink->owner,
9780 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9781 indx++;
9782 p += 4;
9783 }
9784 htab->glink->rawsize = p - htab->glink->contents;
9785 }
9786
9787 if (htab->brlt->size != 0)
9788 {
9789 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9790 htab->brlt->size);
9791 if (htab->brlt->contents == NULL)
9792 return FALSE;
9793 }
9794 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9795 {
9796 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9797 htab->relbrlt->size);
9798 if (htab->relbrlt->contents == NULL)
9799 return FALSE;
9800 }
9801
9802 /* Build the stubs as directed by the stub hash table. */
9803 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9804
9805 if (htab->relbrlt != NULL)
9806 htab->relbrlt->reloc_count = 0;
9807
9808 for (stub_sec = htab->stub_bfd->sections;
9809 stub_sec != NULL;
9810 stub_sec = stub_sec->next)
9811 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9812 {
9813 stub_sec_count += 1;
9814 if (stub_sec->rawsize != stub_sec->size)
9815 break;
9816 }
9817
9818 if (stub_sec != NULL
9819 || htab->glink->rawsize != htab->glink->size)
9820 {
9821 htab->stub_error = TRUE;
9822 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9823 }
9824
9825 if (htab->stub_error)
9826 return FALSE;
9827
9828 if (stats != NULL)
9829 {
9830 *stats = bfd_malloc (500);
9831 if (*stats == NULL)
9832 return FALSE;
9833
9834 sprintf (*stats, _("linker stubs in %u group%s\n"
9835 " branch %lu\n"
9836 " toc adjust %lu\n"
9837 " long branch %lu\n"
9838 " long toc adj %lu\n"
9839 " plt call %lu"),
9840 stub_sec_count,
9841 stub_sec_count == 1 ? "" : "s",
9842 htab->stub_count[ppc_stub_long_branch - 1],
9843 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9844 htab->stub_count[ppc_stub_plt_branch - 1],
9845 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9846 htab->stub_count[ppc_stub_plt_call - 1]);
9847 }
9848 return TRUE;
9849 }
9850
9851 /* This function undoes the changes made by add_symbol_adjust. */
9852
9853 static bfd_boolean
9854 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9855 {
9856 struct ppc_link_hash_entry *eh;
9857
9858 if (h->root.type == bfd_link_hash_indirect)
9859 return TRUE;
9860
9861 if (h->root.type == bfd_link_hash_warning)
9862 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9863
9864 eh = (struct ppc_link_hash_entry *) h;
9865 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9866 return TRUE;
9867
9868 eh->elf.root.type = bfd_link_hash_undefined;
9869 return TRUE;
9870 }
9871
9872 void
9873 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9874 {
9875 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9876 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9877 }
9878
9879 /* What to do when ld finds relocations against symbols defined in
9880 discarded sections. */
9881
9882 static unsigned int
9883 ppc64_elf_action_discarded (asection *sec)
9884 {
9885 if (strcmp (".opd", sec->name) == 0)
9886 return 0;
9887
9888 if (strcmp (".toc", sec->name) == 0)
9889 return 0;
9890
9891 if (strcmp (".toc1", sec->name) == 0)
9892 return 0;
9893
9894 return _bfd_elf_default_action_discarded (sec);
9895 }
9896
9897 /* The RELOCATE_SECTION function is called by the ELF backend linker
9898 to handle the relocations for a section.
9899
9900 The relocs are always passed as Rela structures; if the section
9901 actually uses Rel structures, the r_addend field will always be
9902 zero.
9903
9904 This function is responsible for adjust the section contents as
9905 necessary, and (if using Rela relocs and generating a
9906 relocatable output file) adjusting the reloc addend as
9907 necessary.
9908
9909 This function does not have to worry about setting the reloc
9910 address or the reloc symbol index.
9911
9912 LOCAL_SYMS is a pointer to the swapped in local symbols.
9913
9914 LOCAL_SECTIONS is an array giving the section in the input file
9915 corresponding to the st_shndx field of each local symbol.
9916
9917 The global hash table entry for the global symbols can be found
9918 via elf_sym_hashes (input_bfd).
9919
9920 When generating relocatable output, this function must handle
9921 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9922 going to be the section symbol corresponding to the output
9923 section, which means that the addend must be adjusted
9924 accordingly. */
9925
9926 static bfd_boolean
9927 ppc64_elf_relocate_section (bfd *output_bfd,
9928 struct bfd_link_info *info,
9929 bfd *input_bfd,
9930 asection *input_section,
9931 bfd_byte *contents,
9932 Elf_Internal_Rela *relocs,
9933 Elf_Internal_Sym *local_syms,
9934 asection **local_sections)
9935 {
9936 struct ppc_link_hash_table *htab;
9937 Elf_Internal_Shdr *symtab_hdr;
9938 struct elf_link_hash_entry **sym_hashes;
9939 Elf_Internal_Rela *rel;
9940 Elf_Internal_Rela *relend;
9941 Elf_Internal_Rela outrel;
9942 bfd_byte *loc;
9943 struct got_entry **local_got_ents;
9944 bfd_vma TOCstart;
9945 bfd_boolean ret = TRUE;
9946 bfd_boolean is_opd;
9947 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9948 bfd_boolean is_power4 = FALSE;
9949 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
9950
9951 /* Initialize howto table if needed. */
9952 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9953 ppc_howto_init ();
9954
9955 htab = ppc_hash_table (info);
9956
9957 /* Don't relocate stub sections. */
9958 if (input_section->owner == htab->stub_bfd)
9959 return TRUE;
9960
9961 local_got_ents = elf_local_got_ents (input_bfd);
9962 TOCstart = elf_gp (output_bfd);
9963 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9964 sym_hashes = elf_sym_hashes (input_bfd);
9965 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
9966
9967 rel = relocs;
9968 relend = relocs + input_section->reloc_count;
9969 for (; rel < relend; rel++)
9970 {
9971 enum elf_ppc64_reloc_type r_type;
9972 bfd_vma addend, orig_addend;
9973 bfd_reloc_status_type r;
9974 Elf_Internal_Sym *sym;
9975 asection *sec;
9976 struct elf_link_hash_entry *h_elf;
9977 struct ppc_link_hash_entry *h;
9978 struct ppc_link_hash_entry *fdh;
9979 const char *sym_name;
9980 unsigned long r_symndx, toc_symndx;
9981 char tls_mask, tls_gd, tls_type;
9982 char sym_type;
9983 bfd_vma relocation;
9984 bfd_boolean unresolved_reloc;
9985 bfd_boolean warned;
9986 unsigned long insn, mask;
9987 struct ppc_stub_hash_entry *stub_entry;
9988 bfd_vma max_br_offset;
9989 bfd_vma from;
9990
9991 r_type = ELF64_R_TYPE (rel->r_info);
9992 r_symndx = ELF64_R_SYM (rel->r_info);
9993
9994 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9995 symbol of the previous ADDR64 reloc. The symbol gives us the
9996 proper TOC base to use. */
9997 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9998 && rel != relocs
9999 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10000 && is_opd)
10001 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10002
10003 sym = NULL;
10004 sec = NULL;
10005 h_elf = NULL;
10006 sym_name = NULL;
10007 unresolved_reloc = FALSE;
10008 warned = FALSE;
10009 orig_addend = rel->r_addend;
10010
10011 if (r_symndx < symtab_hdr->sh_info)
10012 {
10013 /* It's a local symbol. */
10014 struct _opd_sec_data *opd;
10015
10016 sym = local_syms + r_symndx;
10017 sec = local_sections[r_symndx];
10018 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10019 sym_type = ELF64_ST_TYPE (sym->st_info);
10020 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10021 opd = get_opd_info (sec);
10022 if (opd != NULL && opd->adjust != NULL)
10023 {
10024 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10025 if (adjust == -1)
10026 relocation = 0;
10027 else
10028 {
10029 /* If this is a relocation against the opd section sym
10030 and we have edited .opd, adjust the reloc addend so
10031 that ld -r and ld --emit-relocs output is correct.
10032 If it is a reloc against some other .opd symbol,
10033 then the symbol value will be adjusted later. */
10034 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10035 rel->r_addend += adjust;
10036 else
10037 relocation += adjust;
10038 }
10039 }
10040 }
10041 else
10042 {
10043 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10044 r_symndx, symtab_hdr, sym_hashes,
10045 h_elf, sec, relocation,
10046 unresolved_reloc, warned);
10047 sym_name = h_elf->root.root.string;
10048 sym_type = h_elf->type;
10049 }
10050 h = (struct ppc_link_hash_entry *) h_elf;
10051
10052 if (sec != NULL && elf_discarded_section (sec))
10053 {
10054 /* For relocs against symbols from removed linkonce sections,
10055 or sections discarded by a linker script, we just want the
10056 section contents zeroed. Avoid any special processing. */
10057 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10058 contents + rel->r_offset);
10059 rel->r_info = 0;
10060 rel->r_addend = 0;
10061 continue;
10062 }
10063
10064 if (info->relocatable)
10065 continue;
10066
10067 /* TLS optimizations. Replace instruction sequences and relocs
10068 based on information we collected in tls_optimize. We edit
10069 RELOCS so that --emit-relocs will output something sensible
10070 for the final instruction stream. */
10071 tls_mask = 0;
10072 tls_gd = 0;
10073 toc_symndx = 0;
10074 if (IS_PPC64_TLS_RELOC (r_type))
10075 {
10076 if (h != NULL)
10077 tls_mask = h->tls_mask;
10078 else if (local_got_ents != NULL)
10079 {
10080 char *lgot_masks;
10081 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10082 tls_mask = lgot_masks[r_symndx];
10083 }
10084 if (tls_mask == 0 && r_type == R_PPC64_TLS)
10085 {
10086 /* Check for toc tls entries. */
10087 char *toc_tls;
10088
10089 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10090 rel, input_bfd))
10091 return FALSE;
10092
10093 if (toc_tls)
10094 tls_mask = *toc_tls;
10095 }
10096 }
10097
10098 /* Check that tls relocs are used with tls syms, and non-tls
10099 relocs are used with non-tls syms. */
10100 if (r_symndx != 0
10101 && r_type != R_PPC64_NONE
10102 && (h == NULL
10103 || h->elf.root.type == bfd_link_hash_defined
10104 || h->elf.root.type == bfd_link_hash_defweak)
10105 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
10106 {
10107 if (r_type == R_PPC64_TLS && tls_mask != 0)
10108 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10109 ;
10110 else
10111 (*_bfd_error_handler)
10112 (sym_type == STT_TLS
10113 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10114 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10115 input_bfd,
10116 input_section,
10117 (long) rel->r_offset,
10118 ppc64_elf_howto_table[r_type]->name,
10119 sym_name);
10120 }
10121
10122 /* Ensure reloc mapping code below stays sane. */
10123 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10124 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10125 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10126 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10127 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10128 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10129 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10130 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10131 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10132 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10133 abort ();
10134
10135 switch (r_type)
10136 {
10137 default:
10138 break;
10139
10140 case R_PPC64_TOC16:
10141 case R_PPC64_TOC16_LO:
10142 case R_PPC64_TOC16_DS:
10143 case R_PPC64_TOC16_LO_DS:
10144 {
10145 /* Check for toc tls entries. */
10146 char *toc_tls;
10147 int retval;
10148
10149 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10150 rel, input_bfd);
10151 if (retval == 0)
10152 return FALSE;
10153
10154 if (toc_tls)
10155 {
10156 tls_mask = *toc_tls;
10157 if (r_type == R_PPC64_TOC16_DS
10158 || r_type == R_PPC64_TOC16_LO_DS)
10159 {
10160 if (tls_mask != 0
10161 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10162 goto toctprel;
10163 }
10164 else
10165 {
10166 /* If we found a GD reloc pair, then we might be
10167 doing a GD->IE transition. */
10168 if (retval == 2)
10169 {
10170 tls_gd = TLS_TPRELGD;
10171 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10172 goto tls_ldgd_opt;
10173 }
10174 else if (retval == 3)
10175 {
10176 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10177 goto tls_ldgd_opt;
10178 }
10179 }
10180 }
10181 }
10182 break;
10183
10184 case R_PPC64_GOT_TPREL16_DS:
10185 case R_PPC64_GOT_TPREL16_LO_DS:
10186 if (tls_mask != 0
10187 && (tls_mask & TLS_TPREL) == 0)
10188 {
10189 toctprel:
10190 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10191 insn &= 31 << 21;
10192 insn |= 0x3c0d0000; /* addis 0,13,0 */
10193 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10194 r_type = R_PPC64_TPREL16_HA;
10195 if (toc_symndx != 0)
10196 {
10197 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10198 /* We changed the symbol. Start over in order to
10199 get h, sym, sec etc. right. */
10200 rel--;
10201 continue;
10202 }
10203 else
10204 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10205 }
10206 break;
10207
10208 case R_PPC64_TLS:
10209 if (tls_mask != 0
10210 && (tls_mask & TLS_TPREL) == 0)
10211 {
10212 bfd_vma rtra;
10213 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10214 if ((insn & ((0x3f << 26) | (31 << 11)))
10215 == ((31 << 26) | (13 << 11)))
10216 rtra = insn & ((1 << 26) - (1 << 16));
10217 else if ((insn & ((0x3f << 26) | (31 << 16)))
10218 == ((31 << 26) | (13 << 16)))
10219 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10220 else
10221 abort ();
10222 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10223 /* add -> addi. */
10224 insn = 14 << 26;
10225 else if ((insn & (31 << 1)) == 23 << 1
10226 && ((insn & (31 << 6)) < 14 << 6
10227 || ((insn & (31 << 6)) >= 16 << 6
10228 && (insn & (31 << 6)) < 24 << 6)))
10229 /* load and store indexed -> dform. */
10230 insn = (32 | ((insn >> 6) & 31)) << 26;
10231 else if ((insn & (31 << 1)) == 21 << 1
10232 && (insn & (0x1a << 6)) == 0)
10233 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10234 insn = (((58 | ((insn >> 6) & 4)) << 26)
10235 | ((insn >> 6) & 1));
10236 else if ((insn & (31 << 1)) == 21 << 1
10237 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10238 /* lwax -> lwa. */
10239 insn = (58 << 26) | 2;
10240 else
10241 abort ();
10242 insn |= rtra;
10243 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10244 /* Was PPC64_TLS which sits on insn boundary, now
10245 PPC64_TPREL16_LO which is at low-order half-word. */
10246 rel->r_offset += d_offset;
10247 r_type = R_PPC64_TPREL16_LO;
10248 if (toc_symndx != 0)
10249 {
10250 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10251 /* We changed the symbol. Start over in order to
10252 get h, sym, sec etc. right. */
10253 rel--;
10254 continue;
10255 }
10256 else
10257 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10258 }
10259 break;
10260
10261 case R_PPC64_GOT_TLSGD16_HI:
10262 case R_PPC64_GOT_TLSGD16_HA:
10263 tls_gd = TLS_TPRELGD;
10264 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10265 goto tls_gdld_hi;
10266 break;
10267
10268 case R_PPC64_GOT_TLSLD16_HI:
10269 case R_PPC64_GOT_TLSLD16_HA:
10270 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10271 {
10272 tls_gdld_hi:
10273 if ((tls_mask & tls_gd) != 0)
10274 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10275 + R_PPC64_GOT_TPREL16_DS);
10276 else
10277 {
10278 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10279 rel->r_offset -= d_offset;
10280 r_type = R_PPC64_NONE;
10281 }
10282 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10283 }
10284 break;
10285
10286 case R_PPC64_GOT_TLSGD16:
10287 case R_PPC64_GOT_TLSGD16_LO:
10288 tls_gd = TLS_TPRELGD;
10289 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10290 goto tls_ldgd_opt;
10291 break;
10292
10293 case R_PPC64_GOT_TLSLD16:
10294 case R_PPC64_GOT_TLSLD16_LO:
10295 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10296 {
10297 bfd_vma insn1, insn2, insn3;
10298 bfd_vma offset;
10299
10300 tls_ldgd_opt:
10301 /* We know that the next reloc is on a tls_get_addr
10302 call, since ppc64_elf_tls_optimize checks this. */
10303 offset = rel[1].r_offset;
10304 insn1 = bfd_get_32 (output_bfd,
10305 contents + rel->r_offset - d_offset);
10306 insn3 = bfd_get_32 (output_bfd,
10307 contents + offset + 4);
10308 if ((tls_mask & tls_gd) != 0)
10309 {
10310 /* IE */
10311 insn1 &= (1 << 26) - (1 << 2);
10312 insn1 |= 58 << 26; /* ld */
10313 insn2 = 0x7c636a14; /* add 3,3,13 */
10314 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10315 R_PPC64_NONE);
10316 if ((tls_mask & TLS_EXPLICIT) == 0)
10317 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10318 + R_PPC64_GOT_TPREL16_DS);
10319 else
10320 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10321 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10322 }
10323 else
10324 {
10325 /* LE */
10326 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10327 insn2 = 0x38630000; /* addi 3,3,0 */
10328 if (tls_gd == 0)
10329 {
10330 /* Was an LD reloc. */
10331 r_symndx = 0;
10332 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10333 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10334 }
10335 else if (toc_symndx != 0)
10336 r_symndx = toc_symndx;
10337 r_type = R_PPC64_TPREL16_HA;
10338 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10339 rel[1].r_info = ELF64_R_INFO (r_symndx,
10340 R_PPC64_TPREL16_LO);
10341 rel[1].r_offset += d_offset;
10342 }
10343 if (insn3 == NOP
10344 || insn3 == CROR_151515 || insn3 == CROR_313131)
10345 {
10346 insn3 = insn2;
10347 insn2 = NOP;
10348 rel[1].r_offset += 4;
10349 }
10350 bfd_put_32 (output_bfd, insn1,
10351 contents + rel->r_offset - d_offset);
10352 bfd_put_32 (output_bfd, insn2, contents + offset);
10353 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10354 if (tls_gd == 0 || toc_symndx != 0)
10355 {
10356 /* We changed the symbol. Start over in order
10357 to get h, sym, sec etc. right. */
10358 rel--;
10359 continue;
10360 }
10361 }
10362 break;
10363
10364 case R_PPC64_DTPMOD64:
10365 if (rel + 1 < relend
10366 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10367 && rel[1].r_offset == rel->r_offset + 8)
10368 {
10369 if ((tls_mask & TLS_GD) == 0)
10370 {
10371 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10372 if ((tls_mask & TLS_TPRELGD) != 0)
10373 r_type = R_PPC64_TPREL64;
10374 else
10375 {
10376 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10377 r_type = R_PPC64_NONE;
10378 }
10379 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10380 }
10381 }
10382 else
10383 {
10384 if ((tls_mask & TLS_LD) == 0)
10385 {
10386 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10387 r_type = R_PPC64_NONE;
10388 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10389 }
10390 }
10391 break;
10392
10393 case R_PPC64_TPREL64:
10394 if ((tls_mask & TLS_TPREL) == 0)
10395 {
10396 r_type = R_PPC64_NONE;
10397 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10398 }
10399 break;
10400 }
10401
10402 /* Handle other relocations that tweak non-addend part of insn. */
10403 insn = 0;
10404 max_br_offset = 1 << 25;
10405 addend = rel->r_addend;
10406 switch (r_type)
10407 {
10408 default:
10409 break;
10410
10411 /* Branch taken prediction relocations. */
10412 case R_PPC64_ADDR14_BRTAKEN:
10413 case R_PPC64_REL14_BRTAKEN:
10414 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10415 /* Fall thru. */
10416
10417 /* Branch not taken prediction relocations. */
10418 case R_PPC64_ADDR14_BRNTAKEN:
10419 case R_PPC64_REL14_BRNTAKEN:
10420 insn |= bfd_get_32 (output_bfd,
10421 contents + rel->r_offset) & ~(0x01 << 21);
10422 /* Fall thru. */
10423
10424 case R_PPC64_REL14:
10425 max_br_offset = 1 << 15;
10426 /* Fall thru. */
10427
10428 case R_PPC64_REL24:
10429 /* Calls to functions with a different TOC, such as calls to
10430 shared objects, need to alter the TOC pointer. This is
10431 done using a linkage stub. A REL24 branching to these
10432 linkage stubs needs to be followed by a nop, as the nop
10433 will be replaced with an instruction to restore the TOC
10434 base pointer. */
10435 stub_entry = NULL;
10436 fdh = h;
10437 if (((h != NULL
10438 && (((fdh = h->oh) != NULL
10439 && fdh->elf.plt.plist != NULL)
10440 || (fdh = h)->elf.plt.plist != NULL))
10441 || (sec != NULL
10442 && sec->output_section != NULL
10443 && sec->id <= htab->top_id
10444 && (htab->stub_group[sec->id].toc_off
10445 != htab->stub_group[input_section->id].toc_off)))
10446 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10447 rel, htab)) != NULL
10448 && (stub_entry->stub_type == ppc_stub_plt_call
10449 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10450 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10451 {
10452 bfd_boolean can_plt_call = FALSE;
10453
10454 if (rel->r_offset + 8 <= input_section->size)
10455 {
10456 unsigned long nop;
10457 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10458 if (nop == NOP
10459 || nop == CROR_151515 || nop == CROR_313131)
10460 {
10461 bfd_put_32 (input_bfd, LD_R2_40R1,
10462 contents + rel->r_offset + 4);
10463 can_plt_call = TRUE;
10464 }
10465 }
10466
10467 if (!can_plt_call)
10468 {
10469 if (stub_entry->stub_type == ppc_stub_plt_call)
10470 {
10471 /* If this is a plain branch rather than a branch
10472 and link, don't require a nop. However, don't
10473 allow tail calls in a shared library as they
10474 will result in r2 being corrupted. */
10475 unsigned long br;
10476 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10477 if (info->executable && (br & 1) == 0)
10478 can_plt_call = TRUE;
10479 else
10480 stub_entry = NULL;
10481 }
10482 else if (h != NULL
10483 && strcmp (h->elf.root.root.string,
10484 ".__libc_start_main") == 0)
10485 {
10486 /* Allow crt1 branch to go via a toc adjusting stub. */
10487 can_plt_call = TRUE;
10488 }
10489 else
10490 {
10491 if (strcmp (input_section->output_section->name,
10492 ".init") == 0
10493 || strcmp (input_section->output_section->name,
10494 ".fini") == 0)
10495 (*_bfd_error_handler)
10496 (_("%B(%A+0x%lx): automatic multiple TOCs "
10497 "not supported using your crt files; "
10498 "recompile with -mminimal-toc or upgrade gcc"),
10499 input_bfd,
10500 input_section,
10501 (long) rel->r_offset);
10502 else
10503 (*_bfd_error_handler)
10504 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10505 "does not allow automatic multiple TOCs; "
10506 "recompile with -mminimal-toc or "
10507 "-fno-optimize-sibling-calls, "
10508 "or make `%s' extern"),
10509 input_bfd,
10510 input_section,
10511 (long) rel->r_offset,
10512 sym_name,
10513 sym_name);
10514 bfd_set_error (bfd_error_bad_value);
10515 ret = FALSE;
10516 }
10517 }
10518
10519 if (can_plt_call
10520 && stub_entry->stub_type == ppc_stub_plt_call)
10521 unresolved_reloc = FALSE;
10522 }
10523
10524 if (stub_entry == NULL
10525 && get_opd_info (sec) != NULL)
10526 {
10527 /* The branch destination is the value of the opd entry. */
10528 bfd_vma off = (relocation + addend
10529 - sec->output_section->vma
10530 - sec->output_offset);
10531 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10532 if (dest != (bfd_vma) -1)
10533 {
10534 relocation = dest;
10535 addend = 0;
10536 }
10537 }
10538
10539 /* If the branch is out of reach we ought to have a long
10540 branch stub. */
10541 from = (rel->r_offset
10542 + input_section->output_offset
10543 + input_section->output_section->vma);
10544
10545 if (stub_entry == NULL
10546 && (relocation + addend - from + max_br_offset
10547 >= 2 * max_br_offset)
10548 && r_type != R_PPC64_ADDR14_BRTAKEN
10549 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10550 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10551 htab);
10552
10553 if (stub_entry != NULL)
10554 {
10555 /* Munge up the value and addend so that we call the stub
10556 rather than the procedure directly. */
10557 relocation = (stub_entry->stub_offset
10558 + stub_entry->stub_sec->output_offset
10559 + stub_entry->stub_sec->output_section->vma);
10560 addend = 0;
10561 }
10562
10563 if (insn != 0)
10564 {
10565 if (is_power4)
10566 {
10567 /* Set 'a' bit. This is 0b00010 in BO field for branch
10568 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10569 for branch on CTR insns (BO == 1a00t or 1a01t). */
10570 if ((insn & (0x14 << 21)) == (0x04 << 21))
10571 insn |= 0x02 << 21;
10572 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10573 insn |= 0x08 << 21;
10574 else
10575 break;
10576 }
10577 else
10578 {
10579 /* Invert 'y' bit if not the default. */
10580 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10581 insn ^= 0x01 << 21;
10582 }
10583
10584 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10585 }
10586
10587 /* NOP out calls to undefined weak functions.
10588 We can thus call a weak function without first
10589 checking whether the function is defined. */
10590 else if (h != NULL
10591 && h->elf.root.type == bfd_link_hash_undefweak
10592 && r_type == R_PPC64_REL24
10593 && relocation == 0
10594 && addend == 0)
10595 {
10596 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10597 continue;
10598 }
10599 break;
10600 }
10601
10602 /* Set `addend'. */
10603 tls_type = 0;
10604 switch (r_type)
10605 {
10606 default:
10607 (*_bfd_error_handler)
10608 (_("%B: unknown relocation type %d for symbol %s"),
10609 input_bfd, (int) r_type, sym_name);
10610
10611 bfd_set_error (bfd_error_bad_value);
10612 ret = FALSE;
10613 continue;
10614
10615 case R_PPC64_NONE:
10616 case R_PPC64_TLS:
10617 case R_PPC64_GNU_VTINHERIT:
10618 case R_PPC64_GNU_VTENTRY:
10619 continue;
10620
10621 /* GOT16 relocations. Like an ADDR16 using the symbol's
10622 address in the GOT as relocation value instead of the
10623 symbol's value itself. Also, create a GOT entry for the
10624 symbol and put the symbol value there. */
10625 case R_PPC64_GOT_TLSGD16:
10626 case R_PPC64_GOT_TLSGD16_LO:
10627 case R_PPC64_GOT_TLSGD16_HI:
10628 case R_PPC64_GOT_TLSGD16_HA:
10629 tls_type = TLS_TLS | TLS_GD;
10630 goto dogot;
10631
10632 case R_PPC64_GOT_TLSLD16:
10633 case R_PPC64_GOT_TLSLD16_LO:
10634 case R_PPC64_GOT_TLSLD16_HI:
10635 case R_PPC64_GOT_TLSLD16_HA:
10636 tls_type = TLS_TLS | TLS_LD;
10637 goto dogot;
10638
10639 case R_PPC64_GOT_TPREL16_DS:
10640 case R_PPC64_GOT_TPREL16_LO_DS:
10641 case R_PPC64_GOT_TPREL16_HI:
10642 case R_PPC64_GOT_TPREL16_HA:
10643 tls_type = TLS_TLS | TLS_TPREL;
10644 goto dogot;
10645
10646 case R_PPC64_GOT_DTPREL16_DS:
10647 case R_PPC64_GOT_DTPREL16_LO_DS:
10648 case R_PPC64_GOT_DTPREL16_HI:
10649 case R_PPC64_GOT_DTPREL16_HA:
10650 tls_type = TLS_TLS | TLS_DTPREL;
10651 goto dogot;
10652
10653 case R_PPC64_GOT16:
10654 case R_PPC64_GOT16_LO:
10655 case R_PPC64_GOT16_HI:
10656 case R_PPC64_GOT16_HA:
10657 case R_PPC64_GOT16_DS:
10658 case R_PPC64_GOT16_LO_DS:
10659 dogot:
10660 {
10661 /* Relocation is to the entry for this symbol in the global
10662 offset table. */
10663 asection *got;
10664 bfd_vma *offp;
10665 bfd_vma off;
10666 unsigned long indx = 0;
10667
10668 if (tls_type == (TLS_TLS | TLS_LD)
10669 && (h == NULL
10670 || !h->elf.def_dynamic))
10671 offp = &ppc64_tlsld_got (input_bfd)->offset;
10672 else
10673 {
10674 struct got_entry *ent;
10675
10676 if (h != NULL)
10677 {
10678 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10679 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10680 &h->elf)
10681 || (info->shared
10682 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10683 /* This is actually a static link, or it is a
10684 -Bsymbolic link and the symbol is defined
10685 locally, or the symbol was forced to be local
10686 because of a version file. */
10687 ;
10688 else
10689 {
10690 indx = h->elf.dynindx;
10691 unresolved_reloc = FALSE;
10692 }
10693 ent = h->elf.got.glist;
10694 }
10695 else
10696 {
10697 if (local_got_ents == NULL)
10698 abort ();
10699 ent = local_got_ents[r_symndx];
10700 }
10701
10702 for (; ent != NULL; ent = ent->next)
10703 if (ent->addend == orig_addend
10704 && ent->owner == input_bfd
10705 && ent->tls_type == tls_type)
10706 break;
10707 if (ent == NULL)
10708 abort ();
10709 offp = &ent->got.offset;
10710 }
10711
10712 got = ppc64_elf_tdata (input_bfd)->got;
10713 if (got == NULL)
10714 abort ();
10715
10716 /* The offset must always be a multiple of 8. We use the
10717 least significant bit to record whether we have already
10718 processed this entry. */
10719 off = *offp;
10720 if ((off & 1) != 0)
10721 off &= ~1;
10722 else
10723 {
10724 /* Generate relocs for the dynamic linker, except in
10725 the case of TLSLD where we'll use one entry per
10726 module. */
10727 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10728
10729 *offp = off | 1;
10730 if ((info->shared || indx != 0)
10731 && (h == NULL
10732 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10733 || h->elf.root.type != bfd_link_hash_undefweak))
10734 {
10735 outrel.r_offset = (got->output_section->vma
10736 + got->output_offset
10737 + off);
10738 outrel.r_addend = addend;
10739 if (tls_type & (TLS_LD | TLS_GD))
10740 {
10741 outrel.r_addend = 0;
10742 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10743 if (tls_type == (TLS_TLS | TLS_GD))
10744 {
10745 loc = relgot->contents;
10746 loc += (relgot->reloc_count++
10747 * sizeof (Elf64_External_Rela));
10748 bfd_elf64_swap_reloca_out (output_bfd,
10749 &outrel, loc);
10750 outrel.r_offset += 8;
10751 outrel.r_addend = addend;
10752 outrel.r_info
10753 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10754 }
10755 }
10756 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10757 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10758 else if (tls_type == (TLS_TLS | TLS_TPREL))
10759 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10760 else if (indx == 0)
10761 {
10762 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10763
10764 /* Write the .got section contents for the sake
10765 of prelink. */
10766 loc = got->contents + off;
10767 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10768 loc);
10769 }
10770 else
10771 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10772
10773 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10774 {
10775 outrel.r_addend += relocation;
10776 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10777 outrel.r_addend -= htab->elf.tls_sec->vma;
10778 }
10779 loc = relgot->contents;
10780 loc += (relgot->reloc_count++
10781 * sizeof (Elf64_External_Rela));
10782 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10783 }
10784
10785 /* Init the .got section contents here if we're not
10786 emitting a reloc. */
10787 else
10788 {
10789 relocation += addend;
10790 if (tls_type == (TLS_TLS | TLS_LD))
10791 relocation = 1;
10792 else if (tls_type != 0)
10793 {
10794 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10795 if (tls_type == (TLS_TLS | TLS_TPREL))
10796 relocation += DTP_OFFSET - TP_OFFSET;
10797
10798 if (tls_type == (TLS_TLS | TLS_GD))
10799 {
10800 bfd_put_64 (output_bfd, relocation,
10801 got->contents + off + 8);
10802 relocation = 1;
10803 }
10804 }
10805
10806 bfd_put_64 (output_bfd, relocation,
10807 got->contents + off);
10808 }
10809 }
10810
10811 if (off >= (bfd_vma) -2)
10812 abort ();
10813
10814 relocation = got->output_offset + off;
10815
10816 /* TOC base (r2) is TOC start plus 0x8000. */
10817 addend = -TOC_BASE_OFF;
10818 }
10819 break;
10820
10821 case R_PPC64_PLT16_HA:
10822 case R_PPC64_PLT16_HI:
10823 case R_PPC64_PLT16_LO:
10824 case R_PPC64_PLT32:
10825 case R_PPC64_PLT64:
10826 /* Relocation is to the entry for this symbol in the
10827 procedure linkage table. */
10828
10829 /* Resolve a PLT reloc against a local symbol directly,
10830 without using the procedure linkage table. */
10831 if (h == NULL)
10832 break;
10833
10834 /* It's possible that we didn't make a PLT entry for this
10835 symbol. This happens when statically linking PIC code,
10836 or when using -Bsymbolic. Go find a match if there is a
10837 PLT entry. */
10838 if (htab->plt != NULL)
10839 {
10840 struct plt_entry *ent;
10841 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10842 if (ent->addend == orig_addend
10843 && ent->plt.offset != (bfd_vma) -1)
10844 {
10845 relocation = (htab->plt->output_section->vma
10846 + htab->plt->output_offset
10847 + ent->plt.offset);
10848 unresolved_reloc = FALSE;
10849 }
10850 }
10851 break;
10852
10853 case R_PPC64_TOC:
10854 /* Relocation value is TOC base. */
10855 relocation = TOCstart;
10856 if (r_symndx == 0)
10857 relocation += htab->stub_group[input_section->id].toc_off;
10858 else if (unresolved_reloc)
10859 ;
10860 else if (sec != NULL && sec->id <= htab->top_id)
10861 relocation += htab->stub_group[sec->id].toc_off;
10862 else
10863 unresolved_reloc = TRUE;
10864 goto dodyn;
10865
10866 /* TOC16 relocs. We want the offset relative to the TOC base,
10867 which is the address of the start of the TOC plus 0x8000.
10868 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10869 in this order. */
10870 case R_PPC64_TOC16:
10871 case R_PPC64_TOC16_LO:
10872 case R_PPC64_TOC16_HI:
10873 case R_PPC64_TOC16_DS:
10874 case R_PPC64_TOC16_LO_DS:
10875 case R_PPC64_TOC16_HA:
10876 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10877 break;
10878
10879 /* Relocate against the beginning of the section. */
10880 case R_PPC64_SECTOFF:
10881 case R_PPC64_SECTOFF_LO:
10882 case R_PPC64_SECTOFF_HI:
10883 case R_PPC64_SECTOFF_DS:
10884 case R_PPC64_SECTOFF_LO_DS:
10885 case R_PPC64_SECTOFF_HA:
10886 if (sec != NULL)
10887 addend -= sec->output_section->vma;
10888 break;
10889
10890 case R_PPC64_REL14:
10891 case R_PPC64_REL14_BRNTAKEN:
10892 case R_PPC64_REL14_BRTAKEN:
10893 case R_PPC64_REL24:
10894 break;
10895
10896 case R_PPC64_TPREL16:
10897 case R_PPC64_TPREL16_LO:
10898 case R_PPC64_TPREL16_HI:
10899 case R_PPC64_TPREL16_HA:
10900 case R_PPC64_TPREL16_DS:
10901 case R_PPC64_TPREL16_LO_DS:
10902 case R_PPC64_TPREL16_HIGHER:
10903 case R_PPC64_TPREL16_HIGHERA:
10904 case R_PPC64_TPREL16_HIGHEST:
10905 case R_PPC64_TPREL16_HIGHESTA:
10906 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10907 if (info->shared)
10908 /* The TPREL16 relocs shouldn't really be used in shared
10909 libs as they will result in DT_TEXTREL being set, but
10910 support them anyway. */
10911 goto dodyn;
10912 break;
10913
10914 case R_PPC64_DTPREL16:
10915 case R_PPC64_DTPREL16_LO:
10916 case R_PPC64_DTPREL16_HI:
10917 case R_PPC64_DTPREL16_HA:
10918 case R_PPC64_DTPREL16_DS:
10919 case R_PPC64_DTPREL16_LO_DS:
10920 case R_PPC64_DTPREL16_HIGHER:
10921 case R_PPC64_DTPREL16_HIGHERA:
10922 case R_PPC64_DTPREL16_HIGHEST:
10923 case R_PPC64_DTPREL16_HIGHESTA:
10924 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10925 break;
10926
10927 case R_PPC64_DTPMOD64:
10928 relocation = 1;
10929 addend = 0;
10930 goto dodyn;
10931
10932 case R_PPC64_TPREL64:
10933 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10934 goto dodyn;
10935
10936 case R_PPC64_DTPREL64:
10937 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10938 /* Fall thru */
10939
10940 /* Relocations that may need to be propagated if this is a
10941 dynamic object. */
10942 case R_PPC64_REL30:
10943 case R_PPC64_REL32:
10944 case R_PPC64_REL64:
10945 case R_PPC64_ADDR14:
10946 case R_PPC64_ADDR14_BRNTAKEN:
10947 case R_PPC64_ADDR14_BRTAKEN:
10948 case R_PPC64_ADDR16:
10949 case R_PPC64_ADDR16_DS:
10950 case R_PPC64_ADDR16_HA:
10951 case R_PPC64_ADDR16_HI:
10952 case R_PPC64_ADDR16_HIGHER:
10953 case R_PPC64_ADDR16_HIGHERA:
10954 case R_PPC64_ADDR16_HIGHEST:
10955 case R_PPC64_ADDR16_HIGHESTA:
10956 case R_PPC64_ADDR16_LO:
10957 case R_PPC64_ADDR16_LO_DS:
10958 case R_PPC64_ADDR24:
10959 case R_PPC64_ADDR32:
10960 case R_PPC64_ADDR64:
10961 case R_PPC64_UADDR16:
10962 case R_PPC64_UADDR32:
10963 case R_PPC64_UADDR64:
10964 dodyn:
10965 if ((input_section->flags & SEC_ALLOC) == 0)
10966 break;
10967
10968 if (NO_OPD_RELOCS && is_opd)
10969 break;
10970
10971 if ((info->shared
10972 && (h == NULL
10973 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10974 || h->elf.root.type != bfd_link_hash_undefweak)
10975 && (MUST_BE_DYN_RELOC (r_type)
10976 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10977 || (ELIMINATE_COPY_RELOCS
10978 && !info->shared
10979 && h != NULL
10980 && h->elf.dynindx != -1
10981 && !h->elf.non_got_ref
10982 && h->elf.def_dynamic
10983 && !h->elf.def_regular))
10984 {
10985 Elf_Internal_Rela outrel;
10986 bfd_boolean skip, relocate;
10987 asection *sreloc;
10988 bfd_byte *loc;
10989 bfd_vma out_off;
10990
10991 /* When generating a dynamic object, these relocations
10992 are copied into the output file to be resolved at run
10993 time. */
10994
10995 skip = FALSE;
10996 relocate = FALSE;
10997
10998 out_off = _bfd_elf_section_offset (output_bfd, info,
10999 input_section, rel->r_offset);
11000 if (out_off == (bfd_vma) -1)
11001 skip = TRUE;
11002 else if (out_off == (bfd_vma) -2)
11003 skip = TRUE, relocate = TRUE;
11004 out_off += (input_section->output_section->vma
11005 + input_section->output_offset);
11006 outrel.r_offset = out_off;
11007 outrel.r_addend = rel->r_addend;
11008
11009 /* Optimize unaligned reloc use. */
11010 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11011 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11012 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11013 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11014 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11015 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11016 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11017 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11018 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11019
11020 if (skip)
11021 memset (&outrel, 0, sizeof outrel);
11022 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11023 && !is_opd
11024 && r_type != R_PPC64_TOC)
11025 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11026 else
11027 {
11028 /* This symbol is local, or marked to become local,
11029 or this is an opd section reloc which must point
11030 at a local function. */
11031 outrel.r_addend += relocation;
11032 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11033 {
11034 if (is_opd && h != NULL)
11035 {
11036 /* Lie about opd entries. This case occurs
11037 when building shared libraries and we
11038 reference a function in another shared
11039 lib. The same thing happens for a weak
11040 definition in an application that's
11041 overridden by a strong definition in a
11042 shared lib. (I believe this is a generic
11043 bug in binutils handling of weak syms.)
11044 In these cases we won't use the opd
11045 entry in this lib. */
11046 unresolved_reloc = FALSE;
11047 }
11048 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11049
11050 /* We need to relocate .opd contents for ld.so.
11051 Prelink also wants simple and consistent rules
11052 for relocs. This make all RELATIVE relocs have
11053 *r_offset equal to r_addend. */
11054 relocate = TRUE;
11055 }
11056 else
11057 {
11058 long indx = 0;
11059
11060 if (bfd_is_abs_section (sec))
11061 ;
11062 else if (sec == NULL || sec->owner == NULL)
11063 {
11064 bfd_set_error (bfd_error_bad_value);
11065 return FALSE;
11066 }
11067 else
11068 {
11069 asection *osec;
11070
11071 osec = sec->output_section;
11072 indx = elf_section_data (osec)->dynindx;
11073
11074 if (indx == 0)
11075 {
11076 if ((osec->flags & SEC_READONLY) == 0
11077 && htab->elf.data_index_section != NULL)
11078 osec = htab->elf.data_index_section;
11079 else
11080 osec = htab->elf.text_index_section;
11081 indx = elf_section_data (osec)->dynindx;
11082 }
11083 BFD_ASSERT (indx != 0);
11084
11085 /* We are turning this relocation into one
11086 against a section symbol, so subtract out
11087 the output section's address but not the
11088 offset of the input section in the output
11089 section. */
11090 outrel.r_addend -= osec->vma;
11091 }
11092
11093 outrel.r_info = ELF64_R_INFO (indx, r_type);
11094 }
11095 }
11096
11097 sreloc = elf_section_data (input_section)->sreloc;
11098 if (sreloc == NULL)
11099 abort ();
11100
11101 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11102 >= sreloc->size)
11103 abort ();
11104 loc = sreloc->contents;
11105 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11106 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11107
11108 /* If this reloc is against an external symbol, it will
11109 be computed at runtime, so there's no need to do
11110 anything now. However, for the sake of prelink ensure
11111 that the section contents are a known value. */
11112 if (! relocate)
11113 {
11114 unresolved_reloc = FALSE;
11115 /* The value chosen here is quite arbitrary as ld.so
11116 ignores section contents except for the special
11117 case of .opd where the contents might be accessed
11118 before relocation. Choose zero, as that won't
11119 cause reloc overflow. */
11120 relocation = 0;
11121 addend = 0;
11122 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11123 to improve backward compatibility with older
11124 versions of ld. */
11125 if (r_type == R_PPC64_ADDR64)
11126 addend = outrel.r_addend;
11127 /* Adjust pc_relative relocs to have zero in *r_offset. */
11128 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11129 addend = (input_section->output_section->vma
11130 + input_section->output_offset
11131 + rel->r_offset);
11132 }
11133 }
11134 break;
11135
11136 case R_PPC64_COPY:
11137 case R_PPC64_GLOB_DAT:
11138 case R_PPC64_JMP_SLOT:
11139 case R_PPC64_RELATIVE:
11140 /* We shouldn't ever see these dynamic relocs in relocatable
11141 files. */
11142 /* Fall through. */
11143
11144 case R_PPC64_PLTGOT16:
11145 case R_PPC64_PLTGOT16_DS:
11146 case R_PPC64_PLTGOT16_HA:
11147 case R_PPC64_PLTGOT16_HI:
11148 case R_PPC64_PLTGOT16_LO:
11149 case R_PPC64_PLTGOT16_LO_DS:
11150 case R_PPC64_PLTREL32:
11151 case R_PPC64_PLTREL64:
11152 /* These ones haven't been implemented yet. */
11153
11154 (*_bfd_error_handler)
11155 (_("%B: relocation %s is not supported for symbol %s."),
11156 input_bfd,
11157 ppc64_elf_howto_table[r_type]->name, sym_name);
11158
11159 bfd_set_error (bfd_error_invalid_operation);
11160 ret = FALSE;
11161 continue;
11162 }
11163
11164 /* Do any further special processing. */
11165 switch (r_type)
11166 {
11167 default:
11168 break;
11169
11170 case R_PPC64_ADDR16_HA:
11171 case R_PPC64_ADDR16_HIGHERA:
11172 case R_PPC64_ADDR16_HIGHESTA:
11173 case R_PPC64_TOC16_HA:
11174 case R_PPC64_SECTOFF_HA:
11175 case R_PPC64_TPREL16_HA:
11176 case R_PPC64_DTPREL16_HA:
11177 case R_PPC64_TPREL16_HIGHER:
11178 case R_PPC64_TPREL16_HIGHERA:
11179 case R_PPC64_TPREL16_HIGHEST:
11180 case R_PPC64_TPREL16_HIGHESTA:
11181 case R_PPC64_DTPREL16_HIGHER:
11182 case R_PPC64_DTPREL16_HIGHERA:
11183 case R_PPC64_DTPREL16_HIGHEST:
11184 case R_PPC64_DTPREL16_HIGHESTA:
11185 /* It's just possible that this symbol is a weak symbol
11186 that's not actually defined anywhere. In that case,
11187 'sec' would be NULL, and we should leave the symbol
11188 alone (it will be set to zero elsewhere in the link). */
11189 if (sec == NULL)
11190 break;
11191 /* Fall thru */
11192
11193 case R_PPC64_GOT16_HA:
11194 case R_PPC64_PLTGOT16_HA:
11195 case R_PPC64_PLT16_HA:
11196 case R_PPC64_GOT_TLSGD16_HA:
11197 case R_PPC64_GOT_TLSLD16_HA:
11198 case R_PPC64_GOT_TPREL16_HA:
11199 case R_PPC64_GOT_DTPREL16_HA:
11200 /* Add 0x10000 if sign bit in 0:15 is set.
11201 Bits 0:15 are not used. */
11202 addend += 0x8000;
11203 break;
11204
11205 case R_PPC64_ADDR16_DS:
11206 case R_PPC64_ADDR16_LO_DS:
11207 case R_PPC64_GOT16_DS:
11208 case R_PPC64_GOT16_LO_DS:
11209 case R_PPC64_PLT16_LO_DS:
11210 case R_PPC64_SECTOFF_DS:
11211 case R_PPC64_SECTOFF_LO_DS:
11212 case R_PPC64_TOC16_DS:
11213 case R_PPC64_TOC16_LO_DS:
11214 case R_PPC64_PLTGOT16_DS:
11215 case R_PPC64_PLTGOT16_LO_DS:
11216 case R_PPC64_GOT_TPREL16_DS:
11217 case R_PPC64_GOT_TPREL16_LO_DS:
11218 case R_PPC64_GOT_DTPREL16_DS:
11219 case R_PPC64_GOT_DTPREL16_LO_DS:
11220 case R_PPC64_TPREL16_DS:
11221 case R_PPC64_TPREL16_LO_DS:
11222 case R_PPC64_DTPREL16_DS:
11223 case R_PPC64_DTPREL16_LO_DS:
11224 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11225 mask = 3;
11226 /* If this reloc is against an lq insn, then the value must be
11227 a multiple of 16. This is somewhat of a hack, but the
11228 "correct" way to do this by defining _DQ forms of all the
11229 _DS relocs bloats all reloc switches in this file. It
11230 doesn't seem to make much sense to use any of these relocs
11231 in data, so testing the insn should be safe. */
11232 if ((insn & (0x3f << 26)) == (56u << 26))
11233 mask = 15;
11234 if (((relocation + addend) & mask) != 0)
11235 {
11236 (*_bfd_error_handler)
11237 (_("%B: error: relocation %s not a multiple of %d"),
11238 input_bfd,
11239 ppc64_elf_howto_table[r_type]->name,
11240 mask + 1);
11241 bfd_set_error (bfd_error_bad_value);
11242 ret = FALSE;
11243 continue;
11244 }
11245 break;
11246 }
11247
11248 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11249 because such sections are not SEC_ALLOC and thus ld.so will
11250 not process them. */
11251 if (unresolved_reloc
11252 && !((input_section->flags & SEC_DEBUGGING) != 0
11253 && h->elf.def_dynamic))
11254 {
11255 (*_bfd_error_handler)
11256 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11257 input_bfd,
11258 input_section,
11259 (long) rel->r_offset,
11260 ppc64_elf_howto_table[(int) r_type]->name,
11261 h->elf.root.root.string);
11262 ret = FALSE;
11263 }
11264
11265 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11266 input_bfd,
11267 input_section,
11268 contents,
11269 rel->r_offset,
11270 relocation,
11271 addend);
11272
11273 if (r != bfd_reloc_ok)
11274 {
11275 if (sym_name == NULL)
11276 sym_name = "(null)";
11277 if (r == bfd_reloc_overflow)
11278 {
11279 if (warned)
11280 continue;
11281 if (h != NULL
11282 && h->elf.root.type == bfd_link_hash_undefweak
11283 && ppc64_elf_howto_table[r_type]->pc_relative)
11284 {
11285 /* Assume this is a call protected by other code that
11286 detects the symbol is undefined. If this is the case,
11287 we can safely ignore the overflow. If not, the
11288 program is hosed anyway, and a little warning isn't
11289 going to help. */
11290
11291 continue;
11292 }
11293
11294 if (!((*info->callbacks->reloc_overflow)
11295 (info, (h ? &h->elf.root : NULL), sym_name,
11296 ppc64_elf_howto_table[r_type]->name,
11297 orig_addend, input_bfd, input_section, rel->r_offset)))
11298 return FALSE;
11299 }
11300 else
11301 {
11302 (*_bfd_error_handler)
11303 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11304 input_bfd,
11305 input_section,
11306 (long) rel->r_offset,
11307 ppc64_elf_howto_table[r_type]->name,
11308 sym_name,
11309 (int) r);
11310 ret = FALSE;
11311 }
11312 }
11313 }
11314
11315 /* If we're emitting relocations, then shortly after this function
11316 returns, reloc offsets and addends for this section will be
11317 adjusted. Worse, reloc symbol indices will be for the output
11318 file rather than the input. Save a copy of the relocs for
11319 opd_entry_value. */
11320 if (is_opd && (info->emitrelocations || info->relocatable))
11321 {
11322 bfd_size_type amt;
11323 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11324 rel = bfd_alloc (input_bfd, amt);
11325 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11326 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11327 if (rel == NULL)
11328 return FALSE;
11329 memcpy (rel, relocs, amt);
11330 }
11331 return ret;
11332 }
11333
11334 /* Adjust the value of any local symbols in opd sections. */
11335
11336 static bfd_boolean
11337 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11338 const char *name ATTRIBUTE_UNUSED,
11339 Elf_Internal_Sym *elfsym,
11340 asection *input_sec,
11341 struct elf_link_hash_entry *h)
11342 {
11343 struct _opd_sec_data *opd;
11344 long adjust;
11345 bfd_vma value;
11346
11347 if (h != NULL)
11348 return TRUE;
11349
11350 opd = get_opd_info (input_sec);
11351 if (opd == NULL || opd->adjust == NULL)
11352 return TRUE;
11353
11354 value = elfsym->st_value - input_sec->output_offset;
11355 if (!info->relocatable)
11356 value -= input_sec->output_section->vma;
11357
11358 adjust = opd->adjust[value / 8];
11359 if (adjust == -1)
11360 elfsym->st_value = 0;
11361 else
11362 elfsym->st_value += adjust;
11363 return TRUE;
11364 }
11365
11366 /* Finish up dynamic symbol handling. We set the contents of various
11367 dynamic sections here. */
11368
11369 static bfd_boolean
11370 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11371 struct bfd_link_info *info,
11372 struct elf_link_hash_entry *h,
11373 Elf_Internal_Sym *sym)
11374 {
11375 struct ppc_link_hash_table *htab;
11376 struct plt_entry *ent;
11377 Elf_Internal_Rela rela;
11378 bfd_byte *loc;
11379
11380 htab = ppc_hash_table (info);
11381
11382 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11383 if (ent->plt.offset != (bfd_vma) -1)
11384 {
11385 /* This symbol has an entry in the procedure linkage
11386 table. Set it up. */
11387
11388 if (htab->plt == NULL
11389 || htab->relplt == NULL
11390 || htab->glink == NULL)
11391 abort ();
11392
11393 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11394 fill in the PLT entry. */
11395 rela.r_offset = (htab->plt->output_section->vma
11396 + htab->plt->output_offset
11397 + ent->plt.offset);
11398 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11399 rela.r_addend = ent->addend;
11400
11401 loc = htab->relplt->contents;
11402 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11403 * sizeof (Elf64_External_Rela));
11404 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11405 }
11406
11407 if (h->needs_copy)
11408 {
11409 Elf_Internal_Rela rela;
11410 bfd_byte *loc;
11411
11412 /* This symbol needs a copy reloc. Set it up. */
11413
11414 if (h->dynindx == -1
11415 || (h->root.type != bfd_link_hash_defined
11416 && h->root.type != bfd_link_hash_defweak)
11417 || htab->relbss == NULL)
11418 abort ();
11419
11420 rela.r_offset = (h->root.u.def.value
11421 + h->root.u.def.section->output_section->vma
11422 + h->root.u.def.section->output_offset);
11423 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11424 rela.r_addend = 0;
11425 loc = htab->relbss->contents;
11426 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11427 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11428 }
11429
11430 /* Mark some specially defined symbols as absolute. */
11431 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11432 sym->st_shndx = SHN_ABS;
11433
11434 return TRUE;
11435 }
11436
11437 /* Used to decide how to sort relocs in an optimal manner for the
11438 dynamic linker, before writing them out. */
11439
11440 static enum elf_reloc_type_class
11441 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11442 {
11443 enum elf_ppc64_reloc_type r_type;
11444
11445 r_type = ELF64_R_TYPE (rela->r_info);
11446 switch (r_type)
11447 {
11448 case R_PPC64_RELATIVE:
11449 return reloc_class_relative;
11450 case R_PPC64_JMP_SLOT:
11451 return reloc_class_plt;
11452 case R_PPC64_COPY:
11453 return reloc_class_copy;
11454 default:
11455 return reloc_class_normal;
11456 }
11457 }
11458
11459 /* Finish up the dynamic sections. */
11460
11461 static bfd_boolean
11462 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11463 struct bfd_link_info *info)
11464 {
11465 struct ppc_link_hash_table *htab;
11466 bfd *dynobj;
11467 asection *sdyn;
11468
11469 htab = ppc_hash_table (info);
11470 dynobj = htab->elf.dynobj;
11471 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11472
11473 if (htab->elf.dynamic_sections_created)
11474 {
11475 Elf64_External_Dyn *dyncon, *dynconend;
11476
11477 if (sdyn == NULL || htab->got == NULL)
11478 abort ();
11479
11480 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11481 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11482 for (; dyncon < dynconend; dyncon++)
11483 {
11484 Elf_Internal_Dyn dyn;
11485 asection *s;
11486
11487 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11488
11489 switch (dyn.d_tag)
11490 {
11491 default:
11492 continue;
11493
11494 case DT_PPC64_GLINK:
11495 s = htab->glink;
11496 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11497 /* We stupidly defined DT_PPC64_GLINK to be the start
11498 of glink rather than the first entry point, which is
11499 what ld.so needs, and now have a bigger stub to
11500 support automatic multiple TOCs. */
11501 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11502 break;
11503
11504 case DT_PPC64_OPD:
11505 s = bfd_get_section_by_name (output_bfd, ".opd");
11506 if (s == NULL)
11507 continue;
11508 dyn.d_un.d_ptr = s->vma;
11509 break;
11510
11511 case DT_PPC64_OPDSZ:
11512 s = bfd_get_section_by_name (output_bfd, ".opd");
11513 if (s == NULL)
11514 continue;
11515 dyn.d_un.d_val = s->size;
11516 break;
11517
11518 case DT_PLTGOT:
11519 s = htab->plt;
11520 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11521 break;
11522
11523 case DT_JMPREL:
11524 s = htab->relplt;
11525 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11526 break;
11527
11528 case DT_PLTRELSZ:
11529 dyn.d_un.d_val = htab->relplt->size;
11530 break;
11531
11532 case DT_RELASZ:
11533 /* Don't count procedure linkage table relocs in the
11534 overall reloc count. */
11535 s = htab->relplt;
11536 if (s == NULL)
11537 continue;
11538 dyn.d_un.d_val -= s->size;
11539 break;
11540
11541 case DT_RELA:
11542 /* We may not be using the standard ELF linker script.
11543 If .rela.plt is the first .rela section, we adjust
11544 DT_RELA to not include it. */
11545 s = htab->relplt;
11546 if (s == NULL)
11547 continue;
11548 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11549 continue;
11550 dyn.d_un.d_ptr += s->size;
11551 break;
11552 }
11553
11554 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11555 }
11556 }
11557
11558 if (htab->got != NULL && htab->got->size != 0)
11559 {
11560 /* Fill in the first entry in the global offset table.
11561 We use it to hold the link-time TOCbase. */
11562 bfd_put_64 (output_bfd,
11563 elf_gp (output_bfd) + TOC_BASE_OFF,
11564 htab->got->contents);
11565
11566 /* Set .got entry size. */
11567 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11568 }
11569
11570 if (htab->plt != NULL && htab->plt->size != 0)
11571 {
11572 /* Set .plt entry size. */
11573 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11574 = PLT_ENTRY_SIZE;
11575 }
11576
11577 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11578 brlt ourselves if emitrelocations. */
11579 if (htab->brlt != NULL
11580 && htab->brlt->reloc_count != 0
11581 && !_bfd_elf_link_output_relocs (output_bfd,
11582 htab->brlt,
11583 &elf_section_data (htab->brlt)->rel_hdr,
11584 elf_section_data (htab->brlt)->relocs,
11585 NULL))
11586 return FALSE;
11587
11588 /* We need to handle writing out multiple GOT sections ourselves,
11589 since we didn't add them to DYNOBJ. We know dynobj is the first
11590 bfd. */
11591 while ((dynobj = dynobj->link_next) != NULL)
11592 {
11593 asection *s;
11594
11595 if (!is_ppc64_elf_target (dynobj->xvec))
11596 continue;
11597
11598 s = ppc64_elf_tdata (dynobj)->got;
11599 if (s != NULL
11600 && s->size != 0
11601 && s->output_section != bfd_abs_section_ptr
11602 && !bfd_set_section_contents (output_bfd, s->output_section,
11603 s->contents, s->output_offset,
11604 s->size))
11605 return FALSE;
11606 s = ppc64_elf_tdata (dynobj)->relgot;
11607 if (s != NULL
11608 && s->size != 0
11609 && s->output_section != bfd_abs_section_ptr
11610 && !bfd_set_section_contents (output_bfd, s->output_section,
11611 s->contents, s->output_offset,
11612 s->size))
11613 return FALSE;
11614 }
11615
11616 return TRUE;
11617 }
11618
11619 #include "elf64-target.h"
GDB Binutils - Deliverables
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