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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_check_directives
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
100 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
101 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
102 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
103 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
104 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
105 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
106 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
107 #define elf_backend_action_discarded ppc64_elf_action_discarded
108 #define elf_backend_relocate_section ppc64_elf_relocate_section
109 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
110 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
111 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
112 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
113 #define elf_backend_special_sections ppc64_elf_special_sections
114
115 /* The name of the dynamic interpreter. This is put in the .interp
116 section. */
117 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
118
119 /* The size in bytes of an entry in the procedure linkage table. */
120 #define PLT_ENTRY_SIZE 24
121
122 /* The initial size of the plt reserved for the dynamic linker. */
123 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
124
125 /* TOC base pointers offset from start of TOC. */
126 #define TOC_BASE_OFF 0x8000
127
128 /* Offset of tp and dtp pointers from start of TLS block. */
129 #define TP_OFFSET 0x7000
130 #define DTP_OFFSET 0x8000
131
132 /* .plt call stub instructions. The normal stub is like this, but
133 sometimes the .plt entry crosses a 64k boundary and we need to
134 insert an addi to adjust r12. */
135 #define PLT_CALL_STUB_SIZE (7*4)
136 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
137 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
138 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
139 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
140 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
141 /* ld %r11,xxx+16@l(%r12) */
142 #define BCTR 0x4e800420 /* bctr */
143
144
145 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
146 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
147 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
148 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
149
150 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
151 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
152
153 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
154
155 /* glink call stub instructions. We enter with the index in R0. */
156 #define GLINK_CALL_STUB_SIZE (16*4)
157 /* 0: */
158 /* .quad plt0-1f */
159 /* __glink: */
160 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
161 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
162 /* 1: */
163 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
164 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
165 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
166 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
167 /* ld %11,0(%12) */
168 /* ld %2,8(%12) */
169 /* mtctr %11 */
170 /* ld %11,16(%12) */
171 /* bctr */
172
173 /* Pad with this. */
174 #define NOP 0x60000000
175
176 /* Some other nops. */
177 #define CROR_151515 0x4def7b82
178 #define CROR_313131 0x4ffffb82
179
180 /* .glink entries for the first 32k functions are two instructions. */
181 #define LI_R0_0 0x38000000 /* li %r0,0 */
182 #define B_DOT 0x48000000 /* b . */
183
184 /* After that, we need two instructions to load the index, followed by
185 a branch. */
186 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
187 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
188
189 /* Instructions used by the save and restore reg functions. */
190 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
191 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
192 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
193 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
194 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
195 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
196 #define LI_R12_0 0x39800000 /* li %r12,0 */
197 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
198 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
199 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
200 #define BLR 0x4e800020 /* blr */
201
202 /* Since .opd is an array of descriptors and each entry will end up
203 with identical R_PPC64_RELATIVE relocs, there is really no need to
204 propagate .opd relocs; The dynamic linker should be taught to
205 relocate .opd without reloc entries. */
206 #ifndef NO_OPD_RELOCS
207 #define NO_OPD_RELOCS 0
208 #endif
209 \f
210 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
211
212 /* Relocation HOWTO's. */
213 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
214
215 static reloc_howto_type ppc64_elf_howto_raw[] = {
216 /* This reloc does nothing. */
217 HOWTO (R_PPC64_NONE, /* type */
218 0, /* rightshift */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
220 32, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_dont, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC64_NONE", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A standard 32 bit relocation. */
232 HOWTO (R_PPC64_ADDR32, /* type */
233 0, /* rightshift */
234 2, /* size (0 = byte, 1 = short, 2 = long) */
235 32, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_bitfield, /* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC64_ADDR32", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffffffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* An absolute 26 bit branch; the lower two bits must be zero.
247 FIXME: we don't check that, we just clear them. */
248 HOWTO (R_PPC64_ADDR24, /* type */
249 0, /* rightshift */
250 2, /* size (0 = byte, 1 = short, 2 = long) */
251 26, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_bitfield, /* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC64_ADDR24", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0x03fffffc, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* A standard 16 bit relocation. */
263 HOWTO (R_PPC64_ADDR16, /* type */
264 0, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_bitfield, /* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_PPC64_ADDR16", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* A 16 bit relocation without overflow. */
278 HOWTO (R_PPC64_ADDR16_LO, /* type */
279 0, /* rightshift */
280 1, /* size (0 = byte, 1 = short, 2 = long) */
281 16, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_dont,/* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_PPC64_ADDR16_LO", /* name */
287 FALSE, /* partial_inplace */
288 0, /* src_mask */
289 0xffff, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* Bits 16-31 of an address. */
293 HOWTO (R_PPC64_ADDR16_HI, /* type */
294 16, /* rightshift */
295 1, /* size (0 = byte, 1 = short, 2 = long) */
296 16, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_dont, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_PPC64_ADDR16_HI", /* name */
302 FALSE, /* partial_inplace */
303 0, /* src_mask */
304 0xffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
308 bits, treated as a signed number, is negative. */
309 HOWTO (R_PPC64_ADDR16_HA, /* type */
310 16, /* rightshift */
311 1, /* size (0 = byte, 1 = short, 2 = long) */
312 16, /* bitsize */
313 FALSE, /* pc_relative */
314 0, /* bitpos */
315 complain_overflow_dont, /* complain_on_overflow */
316 ppc64_elf_ha_reloc, /* special_function */
317 "R_PPC64_ADDR16_HA", /* name */
318 FALSE, /* partial_inplace */
319 0, /* src_mask */
320 0xffff, /* dst_mask */
321 FALSE), /* pcrel_offset */
322
323 /* An absolute 16 bit branch; the lower two bits must be zero.
324 FIXME: we don't check that, we just clear them. */
325 HOWTO (R_PPC64_ADDR14, /* type */
326 0, /* rightshift */
327 2, /* size (0 = byte, 1 = short, 2 = long) */
328 16, /* bitsize */
329 FALSE, /* pc_relative */
330 0, /* bitpos */
331 complain_overflow_bitfield, /* complain_on_overflow */
332 ppc64_elf_branch_reloc, /* special_function */
333 "R_PPC64_ADDR14", /* name */
334 FALSE, /* partial_inplace */
335 0, /* src_mask */
336 0x0000fffc, /* dst_mask */
337 FALSE), /* pcrel_offset */
338
339 /* An absolute 16 bit branch, for which bit 10 should be set to
340 indicate that the branch is expected to be taken. The lower two
341 bits must be zero. */
342 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
343 0, /* rightshift */
344 2, /* size (0 = byte, 1 = short, 2 = long) */
345 16, /* bitsize */
346 FALSE, /* pc_relative */
347 0, /* bitpos */
348 complain_overflow_bitfield, /* complain_on_overflow */
349 ppc64_elf_brtaken_reloc, /* special_function */
350 "R_PPC64_ADDR14_BRTAKEN",/* name */
351 FALSE, /* partial_inplace */
352 0, /* src_mask */
353 0x0000fffc, /* dst_mask */
354 FALSE), /* pcrel_offset */
355
356 /* An absolute 16 bit branch, for which bit 10 should be set to
357 indicate that the branch is not expected to be taken. The lower
358 two bits must be zero. */
359 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 FALSE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_bitfield, /* complain_on_overflow */
366 ppc64_elf_brtaken_reloc, /* special_function */
367 "R_PPC64_ADDR14_BRNTAKEN",/* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0x0000fffc, /* dst_mask */
371 FALSE), /* pcrel_offset */
372
373 /* A relative 26 bit branch; the lower two bits must be zero. */
374 HOWTO (R_PPC64_REL24, /* type */
375 0, /* rightshift */
376 2, /* size (0 = byte, 1 = short, 2 = long) */
377 26, /* bitsize */
378 TRUE, /* pc_relative */
379 0, /* bitpos */
380 complain_overflow_signed, /* complain_on_overflow */
381 ppc64_elf_branch_reloc, /* special_function */
382 "R_PPC64_REL24", /* name */
383 FALSE, /* partial_inplace */
384 0, /* src_mask */
385 0x03fffffc, /* dst_mask */
386 TRUE), /* pcrel_offset */
387
388 /* A relative 16 bit branch; the lower two bits must be zero. */
389 HOWTO (R_PPC64_REL14, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 16, /* bitsize */
393 TRUE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_signed, /* complain_on_overflow */
396 ppc64_elf_branch_reloc, /* special_function */
397 "R_PPC64_REL14", /* name */
398 FALSE, /* partial_inplace */
399 0, /* src_mask */
400 0x0000fffc, /* dst_mask */
401 TRUE), /* pcrel_offset */
402
403 /* A relative 16 bit branch. Bit 10 should be set to indicate that
404 the branch is expected to be taken. The lower two bits must be
405 zero. */
406 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
407 0, /* rightshift */
408 2, /* size (0 = byte, 1 = short, 2 = long) */
409 16, /* bitsize */
410 TRUE, /* pc_relative */
411 0, /* bitpos */
412 complain_overflow_signed, /* complain_on_overflow */
413 ppc64_elf_brtaken_reloc, /* special_function */
414 "R_PPC64_REL14_BRTAKEN", /* name */
415 FALSE, /* partial_inplace */
416 0, /* src_mask */
417 0x0000fffc, /* dst_mask */
418 TRUE), /* pcrel_offset */
419
420 /* A relative 16 bit branch. Bit 10 should be set to indicate that
421 the branch is not expected to be taken. The lower two bits must
422 be zero. */
423 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 16, /* bitsize */
427 TRUE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_signed, /* complain_on_overflow */
430 ppc64_elf_brtaken_reloc, /* special_function */
431 "R_PPC64_REL14_BRNTAKEN",/* name */
432 FALSE, /* partial_inplace */
433 0, /* src_mask */
434 0x0000fffc, /* dst_mask */
435 TRUE), /* pcrel_offset */
436
437 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
438 symbol. */
439 HOWTO (R_PPC64_GOT16, /* type */
440 0, /* rightshift */
441 1, /* size (0 = byte, 1 = short, 2 = long) */
442 16, /* bitsize */
443 FALSE, /* pc_relative */
444 0, /* bitpos */
445 complain_overflow_signed, /* complain_on_overflow */
446 ppc64_elf_unhandled_reloc, /* special_function */
447 "R_PPC64_GOT16", /* name */
448 FALSE, /* partial_inplace */
449 0, /* src_mask */
450 0xffff, /* dst_mask */
451 FALSE), /* pcrel_offset */
452
453 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
454 the symbol. */
455 HOWTO (R_PPC64_GOT16_LO, /* type */
456 0, /* rightshift */
457 1, /* size (0 = byte, 1 = short, 2 = long) */
458 16, /* bitsize */
459 FALSE, /* pc_relative */
460 0, /* bitpos */
461 complain_overflow_dont, /* complain_on_overflow */
462 ppc64_elf_unhandled_reloc, /* special_function */
463 "R_PPC64_GOT16_LO", /* name */
464 FALSE, /* partial_inplace */
465 0, /* src_mask */
466 0xffff, /* dst_mask */
467 FALSE), /* pcrel_offset */
468
469 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
470 the symbol. */
471 HOWTO (R_PPC64_GOT16_HI, /* type */
472 16, /* rightshift */
473 1, /* size (0 = byte, 1 = short, 2 = long) */
474 16, /* bitsize */
475 FALSE, /* pc_relative */
476 0, /* bitpos */
477 complain_overflow_dont,/* complain_on_overflow */
478 ppc64_elf_unhandled_reloc, /* special_function */
479 "R_PPC64_GOT16_HI", /* name */
480 FALSE, /* partial_inplace */
481 0, /* src_mask */
482 0xffff, /* dst_mask */
483 FALSE), /* pcrel_offset */
484
485 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
486 the symbol. */
487 HOWTO (R_PPC64_GOT16_HA, /* type */
488 16, /* rightshift */
489 1, /* size (0 = byte, 1 = short, 2 = long) */
490 16, /* bitsize */
491 FALSE, /* pc_relative */
492 0, /* bitpos */
493 complain_overflow_dont,/* complain_on_overflow */
494 ppc64_elf_unhandled_reloc, /* special_function */
495 "R_PPC64_GOT16_HA", /* name */
496 FALSE, /* partial_inplace */
497 0, /* src_mask */
498 0xffff, /* dst_mask */
499 FALSE), /* pcrel_offset */
500
501 /* This is used only by the dynamic linker. The symbol should exist
502 both in the object being run and in some shared library. The
503 dynamic linker copies the data addressed by the symbol from the
504 shared library into the object, because the object being
505 run has to have the data at some particular address. */
506 HOWTO (R_PPC64_COPY, /* type */
507 0, /* rightshift */
508 0, /* this one is variable size */
509 0, /* bitsize */
510 FALSE, /* pc_relative */
511 0, /* bitpos */
512 complain_overflow_dont, /* complain_on_overflow */
513 ppc64_elf_unhandled_reloc, /* special_function */
514 "R_PPC64_COPY", /* name */
515 FALSE, /* partial_inplace */
516 0, /* src_mask */
517 0, /* dst_mask */
518 FALSE), /* pcrel_offset */
519
520 /* Like R_PPC64_ADDR64, but used when setting global offset table
521 entries. */
522 HOWTO (R_PPC64_GLOB_DAT, /* type */
523 0, /* rightshift */
524 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
525 64, /* bitsize */
526 FALSE, /* pc_relative */
527 0, /* bitpos */
528 complain_overflow_dont, /* complain_on_overflow */
529 ppc64_elf_unhandled_reloc, /* special_function */
530 "R_PPC64_GLOB_DAT", /* name */
531 FALSE, /* partial_inplace */
532 0, /* src_mask */
533 ONES (64), /* dst_mask */
534 FALSE), /* pcrel_offset */
535
536 /* Created by the link editor. Marks a procedure linkage table
537 entry for a symbol. */
538 HOWTO (R_PPC64_JMP_SLOT, /* type */
539 0, /* rightshift */
540 0, /* size (0 = byte, 1 = short, 2 = long) */
541 0, /* bitsize */
542 FALSE, /* pc_relative */
543 0, /* bitpos */
544 complain_overflow_dont, /* complain_on_overflow */
545 ppc64_elf_unhandled_reloc, /* special_function */
546 "R_PPC64_JMP_SLOT", /* name */
547 FALSE, /* partial_inplace */
548 0, /* src_mask */
549 0, /* dst_mask */
550 FALSE), /* pcrel_offset */
551
552 /* Used only by the dynamic linker. When the object is run, this
553 doubleword64 is set to the load address of the object, plus the
554 addend. */
555 HOWTO (R_PPC64_RELATIVE, /* type */
556 0, /* rightshift */
557 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
558 64, /* bitsize */
559 FALSE, /* pc_relative */
560 0, /* bitpos */
561 complain_overflow_dont, /* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_PPC64_RELATIVE", /* name */
564 FALSE, /* partial_inplace */
565 0, /* src_mask */
566 ONES (64), /* dst_mask */
567 FALSE), /* pcrel_offset */
568
569 /* Like R_PPC64_ADDR32, but may be unaligned. */
570 HOWTO (R_PPC64_UADDR32, /* type */
571 0, /* rightshift */
572 2, /* size (0 = byte, 1 = short, 2 = long) */
573 32, /* bitsize */
574 FALSE, /* pc_relative */
575 0, /* bitpos */
576 complain_overflow_bitfield, /* complain_on_overflow */
577 bfd_elf_generic_reloc, /* special_function */
578 "R_PPC64_UADDR32", /* name */
579 FALSE, /* partial_inplace */
580 0, /* src_mask */
581 0xffffffff, /* dst_mask */
582 FALSE), /* pcrel_offset */
583
584 /* Like R_PPC64_ADDR16, but may be unaligned. */
585 HOWTO (R_PPC64_UADDR16, /* type */
586 0, /* rightshift */
587 1, /* size (0 = byte, 1 = short, 2 = long) */
588 16, /* bitsize */
589 FALSE, /* pc_relative */
590 0, /* bitpos */
591 complain_overflow_bitfield, /* complain_on_overflow */
592 bfd_elf_generic_reloc, /* special_function */
593 "R_PPC64_UADDR16", /* name */
594 FALSE, /* partial_inplace */
595 0, /* src_mask */
596 0xffff, /* dst_mask */
597 FALSE), /* pcrel_offset */
598
599 /* 32-bit PC relative. */
600 HOWTO (R_PPC64_REL32, /* type */
601 0, /* rightshift */
602 2, /* size (0 = byte, 1 = short, 2 = long) */
603 32, /* bitsize */
604 TRUE, /* pc_relative */
605 0, /* bitpos */
606 /* FIXME: Verify. Was complain_overflow_bitfield. */
607 complain_overflow_signed, /* complain_on_overflow */
608 bfd_elf_generic_reloc, /* special_function */
609 "R_PPC64_REL32", /* name */
610 FALSE, /* partial_inplace */
611 0, /* src_mask */
612 0xffffffff, /* dst_mask */
613 TRUE), /* pcrel_offset */
614
615 /* 32-bit relocation to the symbol's procedure linkage table. */
616 HOWTO (R_PPC64_PLT32, /* type */
617 0, /* rightshift */
618 2, /* size (0 = byte, 1 = short, 2 = long) */
619 32, /* bitsize */
620 FALSE, /* pc_relative */
621 0, /* bitpos */
622 complain_overflow_bitfield, /* complain_on_overflow */
623 ppc64_elf_unhandled_reloc, /* special_function */
624 "R_PPC64_PLT32", /* name */
625 FALSE, /* partial_inplace */
626 0, /* src_mask */
627 0xffffffff, /* dst_mask */
628 FALSE), /* pcrel_offset */
629
630 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
631 FIXME: R_PPC64_PLTREL32 not supported. */
632 HOWTO (R_PPC64_PLTREL32, /* type */
633 0, /* rightshift */
634 2, /* size (0 = byte, 1 = short, 2 = long) */
635 32, /* bitsize */
636 TRUE, /* pc_relative */
637 0, /* bitpos */
638 complain_overflow_signed, /* complain_on_overflow */
639 bfd_elf_generic_reloc, /* special_function */
640 "R_PPC64_PLTREL32", /* name */
641 FALSE, /* partial_inplace */
642 0, /* src_mask */
643 0xffffffff, /* dst_mask */
644 TRUE), /* pcrel_offset */
645
646 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
647 the symbol. */
648 HOWTO (R_PPC64_PLT16_LO, /* type */
649 0, /* rightshift */
650 1, /* size (0 = byte, 1 = short, 2 = long) */
651 16, /* bitsize */
652 FALSE, /* pc_relative */
653 0, /* bitpos */
654 complain_overflow_dont, /* complain_on_overflow */
655 ppc64_elf_unhandled_reloc, /* special_function */
656 "R_PPC64_PLT16_LO", /* name */
657 FALSE, /* partial_inplace */
658 0, /* src_mask */
659 0xffff, /* dst_mask */
660 FALSE), /* pcrel_offset */
661
662 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
663 the symbol. */
664 HOWTO (R_PPC64_PLT16_HI, /* type */
665 16, /* rightshift */
666 1, /* size (0 = byte, 1 = short, 2 = long) */
667 16, /* bitsize */
668 FALSE, /* pc_relative */
669 0, /* bitpos */
670 complain_overflow_dont, /* complain_on_overflow */
671 ppc64_elf_unhandled_reloc, /* special_function */
672 "R_PPC64_PLT16_HI", /* name */
673 FALSE, /* partial_inplace */
674 0, /* src_mask */
675 0xffff, /* dst_mask */
676 FALSE), /* pcrel_offset */
677
678 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
679 the symbol. */
680 HOWTO (R_PPC64_PLT16_HA, /* type */
681 16, /* rightshift */
682 1, /* size (0 = byte, 1 = short, 2 = long) */
683 16, /* bitsize */
684 FALSE, /* pc_relative */
685 0, /* bitpos */
686 complain_overflow_dont, /* complain_on_overflow */
687 ppc64_elf_unhandled_reloc, /* special_function */
688 "R_PPC64_PLT16_HA", /* name */
689 FALSE, /* partial_inplace */
690 0, /* src_mask */
691 0xffff, /* dst_mask */
692 FALSE), /* pcrel_offset */
693
694 /* 16-bit section relative relocation. */
695 HOWTO (R_PPC64_SECTOFF, /* type */
696 0, /* rightshift */
697 1, /* size (0 = byte, 1 = short, 2 = long) */
698 16, /* bitsize */
699 FALSE, /* pc_relative */
700 0, /* bitpos */
701 complain_overflow_bitfield, /* complain_on_overflow */
702 ppc64_elf_sectoff_reloc, /* special_function */
703 "R_PPC64_SECTOFF", /* name */
704 FALSE, /* partial_inplace */
705 0, /* src_mask */
706 0xffff, /* dst_mask */
707 FALSE), /* pcrel_offset */
708
709 /* Like R_PPC64_SECTOFF, but no overflow warning. */
710 HOWTO (R_PPC64_SECTOFF_LO, /* type */
711 0, /* rightshift */
712 1, /* size (0 = byte, 1 = short, 2 = long) */
713 16, /* bitsize */
714 FALSE, /* pc_relative */
715 0, /* bitpos */
716 complain_overflow_dont, /* complain_on_overflow */
717 ppc64_elf_sectoff_reloc, /* special_function */
718 "R_PPC64_SECTOFF_LO", /* name */
719 FALSE, /* partial_inplace */
720 0, /* src_mask */
721 0xffff, /* dst_mask */
722 FALSE), /* pcrel_offset */
723
724 /* 16-bit upper half section relative relocation. */
725 HOWTO (R_PPC64_SECTOFF_HI, /* type */
726 16, /* rightshift */
727 1, /* size (0 = byte, 1 = short, 2 = long) */
728 16, /* bitsize */
729 FALSE, /* pc_relative */
730 0, /* bitpos */
731 complain_overflow_dont, /* complain_on_overflow */
732 ppc64_elf_sectoff_reloc, /* special_function */
733 "R_PPC64_SECTOFF_HI", /* name */
734 FALSE, /* partial_inplace */
735 0, /* src_mask */
736 0xffff, /* dst_mask */
737 FALSE), /* pcrel_offset */
738
739 /* 16-bit upper half adjusted section relative relocation. */
740 HOWTO (R_PPC64_SECTOFF_HA, /* type */
741 16, /* rightshift */
742 1, /* size (0 = byte, 1 = short, 2 = long) */
743 16, /* bitsize */
744 FALSE, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_dont, /* complain_on_overflow */
747 ppc64_elf_sectoff_ha_reloc, /* special_function */
748 "R_PPC64_SECTOFF_HA", /* name */
749 FALSE, /* partial_inplace */
750 0, /* src_mask */
751 0xffff, /* dst_mask */
752 FALSE), /* pcrel_offset */
753
754 /* Like R_PPC64_REL24 without touching the two least significant bits. */
755 HOWTO (R_PPC64_REL30, /* type */
756 2, /* rightshift */
757 2, /* size (0 = byte, 1 = short, 2 = long) */
758 30, /* bitsize */
759 TRUE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_dont, /* complain_on_overflow */
762 bfd_elf_generic_reloc, /* special_function */
763 "R_PPC64_REL30", /* name */
764 FALSE, /* partial_inplace */
765 0, /* src_mask */
766 0xfffffffc, /* dst_mask */
767 TRUE), /* pcrel_offset */
768
769 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
770
771 /* A standard 64-bit relocation. */
772 HOWTO (R_PPC64_ADDR64, /* type */
773 0, /* rightshift */
774 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
775 64, /* bitsize */
776 FALSE, /* pc_relative */
777 0, /* bitpos */
778 complain_overflow_dont, /* complain_on_overflow */
779 bfd_elf_generic_reloc, /* special_function */
780 "R_PPC64_ADDR64", /* name */
781 FALSE, /* partial_inplace */
782 0, /* src_mask */
783 ONES (64), /* dst_mask */
784 FALSE), /* pcrel_offset */
785
786 /* The bits 32-47 of an address. */
787 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
788 32, /* rightshift */
789 1, /* size (0 = byte, 1 = short, 2 = long) */
790 16, /* bitsize */
791 FALSE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_dont, /* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_PPC64_ADDR16_HIGHER", /* name */
796 FALSE, /* partial_inplace */
797 0, /* src_mask */
798 0xffff, /* dst_mask */
799 FALSE), /* pcrel_offset */
800
801 /* The bits 32-47 of an address, plus 1 if the contents of the low
802 16 bits, treated as a signed number, is negative. */
803 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
804 32, /* rightshift */
805 1, /* size (0 = byte, 1 = short, 2 = long) */
806 16, /* bitsize */
807 FALSE, /* pc_relative */
808 0, /* bitpos */
809 complain_overflow_dont, /* complain_on_overflow */
810 ppc64_elf_ha_reloc, /* special_function */
811 "R_PPC64_ADDR16_HIGHERA", /* name */
812 FALSE, /* partial_inplace */
813 0, /* src_mask */
814 0xffff, /* dst_mask */
815 FALSE), /* pcrel_offset */
816
817 /* The bits 48-63 of an address. */
818 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
819 48, /* rightshift */
820 1, /* size (0 = byte, 1 = short, 2 = long) */
821 16, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 bfd_elf_generic_reloc, /* special_function */
826 "R_PPC64_ADDR16_HIGHEST", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* The bits 48-63 of an address, plus 1 if the contents of the low
833 16 bits, treated as a signed number, is negative. */
834 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
835 48, /* rightshift */
836 1, /* size (0 = byte, 1 = short, 2 = long) */
837 16, /* bitsize */
838 FALSE, /* pc_relative */
839 0, /* bitpos */
840 complain_overflow_dont, /* complain_on_overflow */
841 ppc64_elf_ha_reloc, /* special_function */
842 "R_PPC64_ADDR16_HIGHESTA", /* name */
843 FALSE, /* partial_inplace */
844 0, /* src_mask */
845 0xffff, /* dst_mask */
846 FALSE), /* pcrel_offset */
847
848 /* Like ADDR64, but may be unaligned. */
849 HOWTO (R_PPC64_UADDR64, /* type */
850 0, /* rightshift */
851 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
852 64, /* bitsize */
853 FALSE, /* pc_relative */
854 0, /* bitpos */
855 complain_overflow_dont, /* complain_on_overflow */
856 bfd_elf_generic_reloc, /* special_function */
857 "R_PPC64_UADDR64", /* name */
858 FALSE, /* partial_inplace */
859 0, /* src_mask */
860 ONES (64), /* dst_mask */
861 FALSE), /* pcrel_offset */
862
863 /* 64-bit relative relocation. */
864 HOWTO (R_PPC64_REL64, /* type */
865 0, /* rightshift */
866 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
867 64, /* bitsize */
868 TRUE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 bfd_elf_generic_reloc, /* special_function */
872 "R_PPC64_REL64", /* name */
873 FALSE, /* partial_inplace */
874 0, /* src_mask */
875 ONES (64), /* dst_mask */
876 TRUE), /* pcrel_offset */
877
878 /* 64-bit relocation to the symbol's procedure linkage table. */
879 HOWTO (R_PPC64_PLT64, /* type */
880 0, /* rightshift */
881 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
882 64, /* bitsize */
883 FALSE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont, /* complain_on_overflow */
886 ppc64_elf_unhandled_reloc, /* special_function */
887 "R_PPC64_PLT64", /* name */
888 FALSE, /* partial_inplace */
889 0, /* src_mask */
890 ONES (64), /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* 64-bit PC relative relocation to the symbol's procedure linkage
894 table. */
895 /* FIXME: R_PPC64_PLTREL64 not supported. */
896 HOWTO (R_PPC64_PLTREL64, /* type */
897 0, /* rightshift */
898 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
899 64, /* bitsize */
900 TRUE, /* pc_relative */
901 0, /* bitpos */
902 complain_overflow_dont, /* complain_on_overflow */
903 ppc64_elf_unhandled_reloc, /* special_function */
904 "R_PPC64_PLTREL64", /* name */
905 FALSE, /* partial_inplace */
906 0, /* src_mask */
907 ONES (64), /* dst_mask */
908 TRUE), /* pcrel_offset */
909
910 /* 16 bit TOC-relative relocation. */
911
912 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
913 HOWTO (R_PPC64_TOC16, /* type */
914 0, /* rightshift */
915 1, /* size (0 = byte, 1 = short, 2 = long) */
916 16, /* bitsize */
917 FALSE, /* pc_relative */
918 0, /* bitpos */
919 complain_overflow_signed, /* complain_on_overflow */
920 ppc64_elf_toc_reloc, /* special_function */
921 "R_PPC64_TOC16", /* name */
922 FALSE, /* partial_inplace */
923 0, /* src_mask */
924 0xffff, /* dst_mask */
925 FALSE), /* pcrel_offset */
926
927 /* 16 bit TOC-relative relocation without overflow. */
928
929 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
930 HOWTO (R_PPC64_TOC16_LO, /* type */
931 0, /* rightshift */
932 1, /* size (0 = byte, 1 = short, 2 = long) */
933 16, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_toc_reloc, /* special_function */
938 "R_PPC64_TOC16_LO", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 0xffff, /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 16 bit TOC-relative relocation, high 16 bits. */
945
946 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
947 HOWTO (R_PPC64_TOC16_HI, /* type */
948 16, /* rightshift */
949 1, /* size (0 = byte, 1 = short, 2 = long) */
950 16, /* bitsize */
951 FALSE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_toc_reloc, /* special_function */
955 "R_PPC64_TOC16_HI", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 0xffff, /* dst_mask */
959 FALSE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
962 contents of the low 16 bits, treated as a signed number, is
963 negative. */
964
965 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
966 HOWTO (R_PPC64_TOC16_HA, /* type */
967 16, /* rightshift */
968 1, /* size (0 = byte, 1 = short, 2 = long) */
969 16, /* bitsize */
970 FALSE, /* pc_relative */
971 0, /* bitpos */
972 complain_overflow_dont, /* complain_on_overflow */
973 ppc64_elf_toc_ha_reloc, /* special_function */
974 "R_PPC64_TOC16_HA", /* name */
975 FALSE, /* partial_inplace */
976 0, /* src_mask */
977 0xffff, /* dst_mask */
978 FALSE), /* pcrel_offset */
979
980 /* 64-bit relocation; insert value of TOC base (.TOC.). */
981
982 /* R_PPC64_TOC 51 doubleword64 .TOC. */
983 HOWTO (R_PPC64_TOC, /* type */
984 0, /* rightshift */
985 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
986 64, /* bitsize */
987 FALSE, /* pc_relative */
988 0, /* bitpos */
989 complain_overflow_bitfield, /* complain_on_overflow */
990 ppc64_elf_toc64_reloc, /* special_function */
991 "R_PPC64_TOC", /* name */
992 FALSE, /* partial_inplace */
993 0, /* src_mask */
994 ONES (64), /* dst_mask */
995 FALSE), /* pcrel_offset */
996
997 /* Like R_PPC64_GOT16, but also informs the link editor that the
998 value to relocate may (!) refer to a PLT entry which the link
999 editor (a) may replace with the symbol value. If the link editor
1000 is unable to fully resolve the symbol, it may (b) create a PLT
1001 entry and store the address to the new PLT entry in the GOT.
1002 This permits lazy resolution of function symbols at run time.
1003 The link editor may also skip all of this and just (c) emit a
1004 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1005 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1006 HOWTO (R_PPC64_PLTGOT16, /* type */
1007 0, /* rightshift */
1008 1, /* size (0 = byte, 1 = short, 2 = long) */
1009 16, /* bitsize */
1010 FALSE, /* pc_relative */
1011 0, /* bitpos */
1012 complain_overflow_signed, /* complain_on_overflow */
1013 ppc64_elf_unhandled_reloc, /* special_function */
1014 "R_PPC64_PLTGOT16", /* name */
1015 FALSE, /* partial_inplace */
1016 0, /* src_mask */
1017 0xffff, /* dst_mask */
1018 FALSE), /* pcrel_offset */
1019
1020 /* Like R_PPC64_PLTGOT16, but without overflow. */
1021 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1022 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1023 0, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_dont, /* complain_on_overflow */
1029 ppc64_elf_unhandled_reloc, /* special_function */
1030 "R_PPC64_PLTGOT16_LO", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1037 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1038 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1039 16, /* rightshift */
1040 1, /* size (0 = byte, 1 = short, 2 = long) */
1041 16, /* bitsize */
1042 FALSE, /* pc_relative */
1043 0, /* bitpos */
1044 complain_overflow_dont, /* complain_on_overflow */
1045 ppc64_elf_unhandled_reloc, /* special_function */
1046 "R_PPC64_PLTGOT16_HI", /* name */
1047 FALSE, /* partial_inplace */
1048 0, /* src_mask */
1049 0xffff, /* dst_mask */
1050 FALSE), /* pcrel_offset */
1051
1052 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1053 1 if the contents of the low 16 bits, treated as a signed number,
1054 is negative. */
1055 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1056 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1057 16, /* rightshift */
1058 1, /* size (0 = byte, 1 = short, 2 = long) */
1059 16, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont,/* complain_on_overflow */
1063 ppc64_elf_unhandled_reloc, /* special_function */
1064 "R_PPC64_PLTGOT16_HA", /* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0xffff, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1071 HOWTO (R_PPC64_ADDR16_DS, /* type */
1072 0, /* rightshift */
1073 1, /* size (0 = byte, 1 = short, 2 = long) */
1074 16, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_bitfield, /* complain_on_overflow */
1078 bfd_elf_generic_reloc, /* special_function */
1079 "R_PPC64_ADDR16_DS", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0xfffc, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1086 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1087 0, /* rightshift */
1088 1, /* size (0 = byte, 1 = short, 2 = long) */
1089 16, /* bitsize */
1090 FALSE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_dont,/* complain_on_overflow */
1093 bfd_elf_generic_reloc, /* special_function */
1094 "R_PPC64_ADDR16_LO_DS",/* name */
1095 FALSE, /* partial_inplace */
1096 0, /* src_mask */
1097 0xfffc, /* dst_mask */
1098 FALSE), /* pcrel_offset */
1099
1100 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1101 HOWTO (R_PPC64_GOT16_DS, /* type */
1102 0, /* rightshift */
1103 1, /* size (0 = byte, 1 = short, 2 = long) */
1104 16, /* bitsize */
1105 FALSE, /* pc_relative */
1106 0, /* bitpos */
1107 complain_overflow_signed, /* complain_on_overflow */
1108 ppc64_elf_unhandled_reloc, /* special_function */
1109 "R_PPC64_GOT16_DS", /* name */
1110 FALSE, /* partial_inplace */
1111 0, /* src_mask */
1112 0xfffc, /* dst_mask */
1113 FALSE), /* pcrel_offset */
1114
1115 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1116 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1117 0, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_dont, /* complain_on_overflow */
1123 ppc64_elf_unhandled_reloc, /* special_function */
1124 "R_PPC64_GOT16_LO_DS", /* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xfffc, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1131 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_dont, /* complain_on_overflow */
1138 ppc64_elf_unhandled_reloc, /* special_function */
1139 "R_PPC64_PLT16_LO_DS", /* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xfffc, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1146 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1147 0, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_bitfield, /* complain_on_overflow */
1153 ppc64_elf_sectoff_reloc, /* special_function */
1154 "R_PPC64_SECTOFF_DS", /* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xfffc, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1161 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1162 0, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_dont, /* complain_on_overflow */
1168 ppc64_elf_sectoff_reloc, /* special_function */
1169 "R_PPC64_SECTOFF_LO_DS",/* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xfffc, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1176 HOWTO (R_PPC64_TOC16_DS, /* type */
1177 0, /* rightshift */
1178 1, /* size (0 = byte, 1 = short, 2 = long) */
1179 16, /* bitsize */
1180 FALSE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_signed, /* complain_on_overflow */
1183 ppc64_elf_toc_reloc, /* special_function */
1184 "R_PPC64_TOC16_DS", /* name */
1185 FALSE, /* partial_inplace */
1186 0, /* src_mask */
1187 0xfffc, /* dst_mask */
1188 FALSE), /* pcrel_offset */
1189
1190 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1191 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1192 0, /* rightshift */
1193 1, /* size (0 = byte, 1 = short, 2 = long) */
1194 16, /* bitsize */
1195 FALSE, /* pc_relative */
1196 0, /* bitpos */
1197 complain_overflow_dont, /* complain_on_overflow */
1198 ppc64_elf_toc_reloc, /* special_function */
1199 "R_PPC64_TOC16_LO_DS", /* name */
1200 FALSE, /* partial_inplace */
1201 0, /* src_mask */
1202 0xfffc, /* dst_mask */
1203 FALSE), /* pcrel_offset */
1204
1205 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1206 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1207 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1208 0, /* rightshift */
1209 1, /* size (0 = byte, 1 = short, 2 = long) */
1210 16, /* bitsize */
1211 FALSE, /* pc_relative */
1212 0, /* bitpos */
1213 complain_overflow_signed, /* complain_on_overflow */
1214 ppc64_elf_unhandled_reloc, /* special_function */
1215 "R_PPC64_PLTGOT16_DS", /* name */
1216 FALSE, /* partial_inplace */
1217 0, /* src_mask */
1218 0xfffc, /* dst_mask */
1219 FALSE), /* pcrel_offset */
1220
1221 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1222 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1223 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1224 0, /* rightshift */
1225 1, /* size (0 = byte, 1 = short, 2 = long) */
1226 16, /* bitsize */
1227 FALSE, /* pc_relative */
1228 0, /* bitpos */
1229 complain_overflow_dont, /* complain_on_overflow */
1230 ppc64_elf_unhandled_reloc, /* special_function */
1231 "R_PPC64_PLTGOT16_LO_DS",/* name */
1232 FALSE, /* partial_inplace */
1233 0, /* src_mask */
1234 0xfffc, /* dst_mask */
1235 FALSE), /* pcrel_offset */
1236
1237 /* Marker reloc for TLS. */
1238 HOWTO (R_PPC64_TLS,
1239 0, /* rightshift */
1240 2, /* size (0 = byte, 1 = short, 2 = long) */
1241 32, /* bitsize */
1242 FALSE, /* pc_relative */
1243 0, /* bitpos */
1244 complain_overflow_dont, /* complain_on_overflow */
1245 bfd_elf_generic_reloc, /* special_function */
1246 "R_PPC64_TLS", /* name */
1247 FALSE, /* partial_inplace */
1248 0, /* src_mask */
1249 0, /* dst_mask */
1250 FALSE), /* pcrel_offset */
1251
1252 /* Computes the load module index of the load module that contains the
1253 definition of its TLS sym. */
1254 HOWTO (R_PPC64_DTPMOD64,
1255 0, /* rightshift */
1256 4, /* size (0 = byte, 1 = short, 2 = long) */
1257 64, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 ppc64_elf_unhandled_reloc, /* special_function */
1262 "R_PPC64_DTPMOD64", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 ONES (64), /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 /* Computes a dtv-relative displacement, the difference between the value
1269 of sym+add and the base address of the thread-local storage block that
1270 contains the definition of sym, minus 0x8000. */
1271 HOWTO (R_PPC64_DTPREL64,
1272 0, /* rightshift */
1273 4, /* size (0 = byte, 1 = short, 2 = long) */
1274 64, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 ppc64_elf_unhandled_reloc, /* special_function */
1279 "R_PPC64_DTPREL64", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 ONES (64), /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* A 16 bit dtprel reloc. */
1286 HOWTO (R_PPC64_DTPREL16,
1287 0, /* rightshift */
1288 1, /* size (0 = byte, 1 = short, 2 = long) */
1289 16, /* bitsize */
1290 FALSE, /* pc_relative */
1291 0, /* bitpos */
1292 complain_overflow_signed, /* complain_on_overflow */
1293 ppc64_elf_unhandled_reloc, /* special_function */
1294 "R_PPC64_DTPREL16", /* name */
1295 FALSE, /* partial_inplace */
1296 0, /* src_mask */
1297 0xffff, /* dst_mask */
1298 FALSE), /* pcrel_offset */
1299
1300 /* Like DTPREL16, but no overflow. */
1301 HOWTO (R_PPC64_DTPREL16_LO,
1302 0, /* rightshift */
1303 1, /* size (0 = byte, 1 = short, 2 = long) */
1304 16, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL16_LO", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 0xffff, /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1316 HOWTO (R_PPC64_DTPREL16_HI,
1317 16, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_dont, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16_HI", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1331 HOWTO (R_PPC64_DTPREL16_HA,
1332 16, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_HA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HIGHER,
1347 32, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HIGHER", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1362 32, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HIGHERA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1377 48, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHEST", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1392 48, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16, but for insns with a DS field. */
1406 HOWTO (R_PPC64_DTPREL16_DS,
1407 0, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_signed, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_DS", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xfffc, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_DS, but no overflow. */
1421 HOWTO (R_PPC64_DTPREL16_LO_DS,
1422 0, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_LO_DS", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xfffc, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Computes a tp-relative displacement, the difference between the value of
1436 sym+add and the value of the thread pointer (r13). */
1437 HOWTO (R_PPC64_TPREL64,
1438 0, /* rightshift */
1439 4, /* size (0 = byte, 1 = short, 2 = long) */
1440 64, /* bitsize */
1441 FALSE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_dont, /* complain_on_overflow */
1444 ppc64_elf_unhandled_reloc, /* special_function */
1445 "R_PPC64_TPREL64", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 ONES (64), /* dst_mask */
1449 FALSE), /* pcrel_offset */
1450
1451 /* A 16 bit tprel reloc. */
1452 HOWTO (R_PPC64_TPREL16,
1453 0, /* rightshift */
1454 1, /* size (0 = byte, 1 = short, 2 = long) */
1455 16, /* bitsize */
1456 FALSE, /* pc_relative */
1457 0, /* bitpos */
1458 complain_overflow_signed, /* complain_on_overflow */
1459 ppc64_elf_unhandled_reloc, /* special_function */
1460 "R_PPC64_TPREL16", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xffff, /* dst_mask */
1464 FALSE), /* pcrel_offset */
1465
1466 /* Like TPREL16, but no overflow. */
1467 HOWTO (R_PPC64_TPREL16_LO,
1468 0, /* rightshift */
1469 1, /* size (0 = byte, 1 = short, 2 = long) */
1470 16, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL16_LO", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0xffff, /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* Like TPREL16_LO, but next higher group of 16 bits. */
1482 HOWTO (R_PPC64_TPREL16_HI,
1483 16, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16_HI", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16_HI, but adjust for low 16 bits. */
1497 HOWTO (R_PPC64_TPREL16_HA,
1498 16, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_HA", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_HI, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HIGHER,
1513 32, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HIGHER", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HIGHERA,
1528 32, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HIGHERA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHEST,
1543 48, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHEST", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1558 48, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHESTA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16, but for insns with a DS field. */
1572 HOWTO (R_PPC64_TPREL16_DS,
1573 0, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_signed, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_DS", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xfffc, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_DS, but no overflow. */
1587 HOWTO (R_PPC64_TPREL16_LO_DS,
1588 0, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_LO_DS", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xfffc, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1602 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1603 to the first entry relative to the TOC base (r2). */
1604 HOWTO (R_PPC64_GOT_TLSGD16,
1605 0, /* rightshift */
1606 1, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_signed, /* complain_on_overflow */
1611 ppc64_elf_unhandled_reloc, /* special_function */
1612 "R_PPC64_GOT_TLSGD16", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0xffff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* Like GOT_TLSGD16, but no overflow. */
1619 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1620 0, /* rightshift */
1621 1, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc64_elf_unhandled_reloc, /* special_function */
1627 "R_PPC64_GOT_TLSGD16_LO", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0xffff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1634 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1635 16, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_dont, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16_HI", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1650 16, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_HA", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1664 with values (sym+add)@dtpmod and zero, and computes the offset to the
1665 first entry relative to the TOC base (r2). */
1666 HOWTO (R_PPC64_GOT_TLSLD16,
1667 0, /* rightshift */
1668 1, /* size (0 = byte, 1 = short, 2 = long) */
1669 16, /* bitsize */
1670 FALSE, /* pc_relative */
1671 0, /* bitpos */
1672 complain_overflow_signed, /* complain_on_overflow */
1673 ppc64_elf_unhandled_reloc, /* special_function */
1674 "R_PPC64_GOT_TLSLD16", /* name */
1675 FALSE, /* partial_inplace */
1676 0, /* src_mask */
1677 0xffff, /* dst_mask */
1678 FALSE), /* pcrel_offset */
1679
1680 /* Like GOT_TLSLD16, but no overflow. */
1681 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1682 0, /* rightshift */
1683 1, /* size (0 = byte, 1 = short, 2 = long) */
1684 16, /* bitsize */
1685 FALSE, /* pc_relative */
1686 0, /* bitpos */
1687 complain_overflow_dont, /* complain_on_overflow */
1688 ppc64_elf_unhandled_reloc, /* special_function */
1689 "R_PPC64_GOT_TLSLD16_LO", /* name */
1690 FALSE, /* partial_inplace */
1691 0, /* src_mask */
1692 0xffff, /* dst_mask */
1693 FALSE), /* pcrel_offset */
1694
1695 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1696 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1697 16, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_dont, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16_HI", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1712 16, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_HA", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1726 the offset to the entry relative to the TOC base (r2). */
1727 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1728 0, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_DTPREL16_DS", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xfffc, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_DTPREL16_DS, but no overflow. */
1742 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1743 0, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_dont, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xfffc, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1757 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1758 16, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_dont, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_HI", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xffff, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1773 16, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_HA", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xffff, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1787 offset to the entry relative to the TOC base (r2). */
1788 HOWTO (R_PPC64_GOT_TPREL16_DS,
1789 0, /* rightshift */
1790 1, /* size (0 = byte, 1 = short, 2 = long) */
1791 16, /* bitsize */
1792 FALSE, /* pc_relative */
1793 0, /* bitpos */
1794 complain_overflow_signed, /* complain_on_overflow */
1795 ppc64_elf_unhandled_reloc, /* special_function */
1796 "R_PPC64_GOT_TPREL16_DS", /* name */
1797 FALSE, /* partial_inplace */
1798 0, /* src_mask */
1799 0xfffc, /* dst_mask */
1800 FALSE), /* pcrel_offset */
1801
1802 /* Like GOT_TPREL16_DS, but no overflow. */
1803 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1804 0, /* rightshift */
1805 1, /* size (0 = byte, 1 = short, 2 = long) */
1806 16, /* bitsize */
1807 FALSE, /* pc_relative */
1808 0, /* bitpos */
1809 complain_overflow_dont, /* complain_on_overflow */
1810 ppc64_elf_unhandled_reloc, /* special_function */
1811 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1812 FALSE, /* partial_inplace */
1813 0, /* src_mask */
1814 0xfffc, /* dst_mask */
1815 FALSE), /* pcrel_offset */
1816
1817 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1818 HOWTO (R_PPC64_GOT_TPREL16_HI,
1819 16, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_dont, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_HI", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xffff, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1833 HOWTO (R_PPC64_GOT_TPREL16_HA,
1834 16, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_HA", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xffff, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* GNU extension to record C++ vtable hierarchy. */
1848 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1849 0, /* rightshift */
1850 0, /* size (0 = byte, 1 = short, 2 = long) */
1851 0, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 NULL, /* special_function */
1856 "R_PPC64_GNU_VTINHERIT", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* GNU extension to record C++ vtable member usage. */
1863 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1864 0, /* rightshift */
1865 0, /* size (0 = byte, 1 = short, 2 = long) */
1866 0, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 NULL, /* special_function */
1871 "R_PPC64_GNU_VTENTRY", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876 };
1877
1878 \f
1879 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1880 be done. */
1881
1882 static void
1883 ppc_howto_init (void)
1884 {
1885 unsigned int i, type;
1886
1887 for (i = 0;
1888 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1889 i++)
1890 {
1891 type = ppc64_elf_howto_raw[i].type;
1892 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1893 / sizeof (ppc64_elf_howto_table[0])));
1894 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1895 }
1896 }
1897
1898 static reloc_howto_type *
1899 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1900 bfd_reloc_code_real_type code)
1901 {
1902 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1903
1904 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1905 /* Initialize howto table if needed. */
1906 ppc_howto_init ();
1907
1908 switch (code)
1909 {
1910 default:
1911 return NULL;
1912
1913 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1914 break;
1915 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1916 break;
1917 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1918 break;
1919 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1920 break;
1921 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1922 break;
1923 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1924 break;
1925 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1926 break;
1927 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1928 break;
1929 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1930 break;
1931 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1932 break;
1933 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1934 break;
1935 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1936 break;
1937 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1938 break;
1939 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1940 break;
1941 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1942 break;
1943 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1944 break;
1945 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1946 break;
1947 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1948 break;
1949 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1950 break;
1951 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1952 break;
1953 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1954 break;
1955 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1956 break;
1957 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1958 break;
1959 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1960 break;
1961 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1962 break;
1963 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1964 break;
1965 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1966 break;
1967 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1968 break;
1969 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1970 break;
1971 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1972 break;
1973 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1974 break;
1975 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1976 break;
1977 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1978 break;
1979 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1980 break;
1981 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1982 break;
1983 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1984 break;
1985 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1986 break;
1987 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1988 break;
1989 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1990 break;
1991 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1992 break;
1993 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1994 break;
1995 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1996 break;
1997 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1998 break;
1999 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2000 break;
2001 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2002 break;
2003 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2004 break;
2005 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2006 break;
2007 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2008 break;
2009 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2010 break;
2011 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2012 break;
2013 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2014 break;
2015 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2018 break;
2019 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2020 break;
2021 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2022 break;
2023 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2024 break;
2025 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2026 break;
2027 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2028 break;
2029 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2030 break;
2031 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2032 break;
2033 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2034 break;
2035 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2036 break;
2037 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2038 break;
2039 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2040 break;
2041 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2042 break;
2043 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2044 break;
2045 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2046 break;
2047 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2048 break;
2049 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2050 break;
2051 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2052 break;
2053 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2066 break;
2067 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2068 break;
2069 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2070 break;
2071 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2072 break;
2073 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2074 break;
2075 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2076 break;
2077 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2078 break;
2079 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2080 break;
2081 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2082 break;
2083 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2084 break;
2085 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2086 break;
2087 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2088 break;
2089 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2090 break;
2091 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2092 break;
2093 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2094 break;
2095 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2096 break;
2097 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2098 break;
2099 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2100 break;
2101 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2102 break;
2103 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2104 break;
2105 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2106 break;
2107 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2108 break;
2109 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2110 break;
2111 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2112 break;
2113 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2114 break;
2115 }
2116
2117 return ppc64_elf_howto_table[r];
2118 };
2119
2120 static reloc_howto_type *
2121 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2122 const char *r_name)
2123 {
2124 unsigned int i;
2125
2126 for (i = 0;
2127 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2128 i++)
2129 if (ppc64_elf_howto_raw[i].name != NULL
2130 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2131 return &ppc64_elf_howto_raw[i];
2132
2133 return NULL;
2134 }
2135
2136 /* Set the howto pointer for a PowerPC ELF reloc. */
2137
2138 static void
2139 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2140 Elf_Internal_Rela *dst)
2141 {
2142 unsigned int type;
2143
2144 /* Initialize howto table if needed. */
2145 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2146 ppc_howto_init ();
2147
2148 type = ELF64_R_TYPE (dst->r_info);
2149 if (type >= (sizeof (ppc64_elf_howto_table)
2150 / sizeof (ppc64_elf_howto_table[0])))
2151 {
2152 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2153 abfd, (int) type);
2154 type = R_PPC64_NONE;
2155 }
2156 cache_ptr->howto = ppc64_elf_howto_table[type];
2157 }
2158
2159 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2160
2161 static bfd_reloc_status_type
2162 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2163 void *data, asection *input_section,
2164 bfd *output_bfd, char **error_message)
2165 {
2166 /* If this is a relocatable link (output_bfd test tells us), just
2167 call the generic function. Any adjustment will be done at final
2168 link time. */
2169 if (output_bfd != NULL)
2170 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2171 input_section, output_bfd, error_message);
2172
2173 /* Adjust the addend for sign extension of the low 16 bits.
2174 We won't actually be using the low 16 bits, so trashing them
2175 doesn't matter. */
2176 reloc_entry->addend += 0x8000;
2177 return bfd_reloc_continue;
2178 }
2179
2180 static bfd_reloc_status_type
2181 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2182 void *data, asection *input_section,
2183 bfd *output_bfd, char **error_message)
2184 {
2185 if (output_bfd != NULL)
2186 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2187 input_section, output_bfd, error_message);
2188
2189 if (strcmp (symbol->section->name, ".opd") == 0
2190 && (symbol->section->owner->flags & DYNAMIC) == 0)
2191 {
2192 bfd_vma dest = opd_entry_value (symbol->section,
2193 symbol->value + reloc_entry->addend,
2194 NULL, NULL);
2195 if (dest != (bfd_vma) -1)
2196 reloc_entry->addend = dest - (symbol->value
2197 + symbol->section->output_section->vma
2198 + symbol->section->output_offset);
2199 }
2200 return bfd_reloc_continue;
2201 }
2202
2203 static bfd_reloc_status_type
2204 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2205 void *data, asection *input_section,
2206 bfd *output_bfd, char **error_message)
2207 {
2208 long insn;
2209 enum elf_ppc64_reloc_type r_type;
2210 bfd_size_type octets;
2211 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2212 bfd_boolean is_power4 = FALSE;
2213
2214 /* If this is a relocatable link (output_bfd test tells us), just
2215 call the generic function. Any adjustment will be done at final
2216 link time. */
2217 if (output_bfd != NULL)
2218 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2219 input_section, output_bfd, error_message);
2220
2221 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2222 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2223 insn &= ~(0x01 << 21);
2224 r_type = reloc_entry->howto->type;
2225 if (r_type == R_PPC64_ADDR14_BRTAKEN
2226 || r_type == R_PPC64_REL14_BRTAKEN)
2227 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2228
2229 if (is_power4)
2230 {
2231 /* Set 'a' bit. This is 0b00010 in BO field for branch
2232 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2233 for branch on CTR insns (BO == 1a00t or 1a01t). */
2234 if ((insn & (0x14 << 21)) == (0x04 << 21))
2235 insn |= 0x02 << 21;
2236 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2237 insn |= 0x08 << 21;
2238 else
2239 goto out;
2240 }
2241 else
2242 {
2243 bfd_vma target = 0;
2244 bfd_vma from;
2245
2246 if (!bfd_is_com_section (symbol->section))
2247 target = symbol->value;
2248 target += symbol->section->output_section->vma;
2249 target += symbol->section->output_offset;
2250 target += reloc_entry->addend;
2251
2252 from = (reloc_entry->address
2253 + input_section->output_offset
2254 + input_section->output_section->vma);
2255
2256 /* Invert 'y' bit if not the default. */
2257 if ((bfd_signed_vma) (target - from) < 0)
2258 insn ^= 0x01 << 21;
2259 }
2260 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2261 out:
2262 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2263 input_section, output_bfd, error_message);
2264 }
2265
2266 static bfd_reloc_status_type
2267 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2268 void *data, asection *input_section,
2269 bfd *output_bfd, char **error_message)
2270 {
2271 /* If this is a relocatable link (output_bfd test tells us), just
2272 call the generic function. Any adjustment will be done at final
2273 link time. */
2274 if (output_bfd != NULL)
2275 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2276 input_section, output_bfd, error_message);
2277
2278 /* Subtract the symbol section base address. */
2279 reloc_entry->addend -= symbol->section->output_section->vma;
2280 return bfd_reloc_continue;
2281 }
2282
2283 static bfd_reloc_status_type
2284 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2285 void *data, asection *input_section,
2286 bfd *output_bfd, char **error_message)
2287 {
2288 /* If this is a relocatable link (output_bfd test tells us), just
2289 call the generic function. Any adjustment will be done at final
2290 link time. */
2291 if (output_bfd != NULL)
2292 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2293 input_section, output_bfd, error_message);
2294
2295 /* Subtract the symbol section base address. */
2296 reloc_entry->addend -= symbol->section->output_section->vma;
2297
2298 /* Adjust the addend for sign extension of the low 16 bits. */
2299 reloc_entry->addend += 0x8000;
2300 return bfd_reloc_continue;
2301 }
2302
2303 static bfd_reloc_status_type
2304 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2305 void *data, asection *input_section,
2306 bfd *output_bfd, char **error_message)
2307 {
2308 bfd_vma TOCstart;
2309
2310 /* If this is a relocatable link (output_bfd test tells us), just
2311 call the generic function. Any adjustment will be done at final
2312 link time. */
2313 if (output_bfd != NULL)
2314 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2315 input_section, output_bfd, error_message);
2316
2317 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2318 if (TOCstart == 0)
2319 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2320
2321 /* Subtract the TOC base address. */
2322 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2323 return bfd_reloc_continue;
2324 }
2325
2326 static bfd_reloc_status_type
2327 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2328 void *data, asection *input_section,
2329 bfd *output_bfd, char **error_message)
2330 {
2331 bfd_vma TOCstart;
2332
2333 /* If this is a relocatable link (output_bfd test tells us), just
2334 call the generic function. Any adjustment will be done at final
2335 link time. */
2336 if (output_bfd != NULL)
2337 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2338 input_section, output_bfd, error_message);
2339
2340 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2341 if (TOCstart == 0)
2342 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2343
2344 /* Subtract the TOC base address. */
2345 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2346
2347 /* Adjust the addend for sign extension of the low 16 bits. */
2348 reloc_entry->addend += 0x8000;
2349 return bfd_reloc_continue;
2350 }
2351
2352 static bfd_reloc_status_type
2353 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2354 void *data, asection *input_section,
2355 bfd *output_bfd, char **error_message)
2356 {
2357 bfd_vma TOCstart;
2358 bfd_size_type octets;
2359
2360 /* If this is a relocatable link (output_bfd test tells us), just
2361 call the generic function. Any adjustment will be done at final
2362 link time. */
2363 if (output_bfd != NULL)
2364 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2365 input_section, output_bfd, error_message);
2366
2367 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2368 if (TOCstart == 0)
2369 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2370
2371 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2372 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2373 return bfd_reloc_ok;
2374 }
2375
2376 static bfd_reloc_status_type
2377 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2378 void *data, asection *input_section,
2379 bfd *output_bfd, char **error_message)
2380 {
2381 /* If this is a relocatable link (output_bfd test tells us), just
2382 call the generic function. Any adjustment will be done at final
2383 link time. */
2384 if (output_bfd != NULL)
2385 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2386 input_section, output_bfd, error_message);
2387
2388 if (error_message != NULL)
2389 {
2390 static char buf[60];
2391 sprintf (buf, "generic linker can't handle %s",
2392 reloc_entry->howto->name);
2393 *error_message = buf;
2394 }
2395 return bfd_reloc_dangerous;
2396 }
2397
2398 struct ppc64_elf_obj_tdata
2399 {
2400 struct elf_obj_tdata elf;
2401
2402 /* Shortcuts to dynamic linker sections. */
2403 asection *got;
2404 asection *relgot;
2405
2406 /* Used during garbage collection. We attach global symbols defined
2407 on removed .opd entries to this section so that the sym is removed. */
2408 asection *deleted_section;
2409
2410 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2411 sections means we potentially need one of these for each input bfd. */
2412 union {
2413 bfd_signed_vma refcount;
2414 bfd_vma offset;
2415 } tlsld_got;
2416
2417 /* A copy of relocs before they are modified for --emit-relocs. */
2418 Elf_Internal_Rela *opd_relocs;
2419 };
2420
2421 #define ppc64_elf_tdata(bfd) \
2422 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2423
2424 #define ppc64_tlsld_got(bfd) \
2425 (&ppc64_elf_tdata (bfd)->tlsld_got)
2426
2427 /* Override the generic function because we store some extras. */
2428
2429 static bfd_boolean
2430 ppc64_elf_mkobject (bfd *abfd)
2431 {
2432 if (abfd->tdata.any == NULL)
2433 {
2434 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2435 abfd->tdata.any = bfd_zalloc (abfd, amt);
2436 if (abfd->tdata.any == NULL)
2437 return FALSE;
2438 }
2439 return bfd_elf_mkobject (abfd);
2440 }
2441
2442 /* Return 1 if target is one of ours. */
2443
2444 static bfd_boolean
2445 is_ppc64_elf_target (const struct bfd_target *targ)
2446 {
2447 extern const bfd_target bfd_elf64_powerpc_vec;
2448 extern const bfd_target bfd_elf64_powerpcle_vec;
2449
2450 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2451 }
2452
2453 /* Fix bad default arch selected for a 64 bit input bfd when the
2454 default is 32 bit. */
2455
2456 static bfd_boolean
2457 ppc64_elf_object_p (bfd *abfd)
2458 {
2459 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2460 {
2461 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2462
2463 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2464 {
2465 /* Relies on arch after 32 bit default being 64 bit default. */
2466 abfd->arch_info = abfd->arch_info->next;
2467 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2468 }
2469 }
2470 return TRUE;
2471 }
2472
2473 /* Support for core dump NOTE sections. */
2474
2475 static bfd_boolean
2476 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2477 {
2478 size_t offset, size;
2479
2480 if (note->descsz != 504)
2481 return FALSE;
2482
2483 /* pr_cursig */
2484 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2485
2486 /* pr_pid */
2487 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2488
2489 /* pr_reg */
2490 offset = 112;
2491 size = 384;
2492
2493 /* Make a ".reg/999" section. */
2494 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2495 size, note->descpos + offset);
2496 }
2497
2498 static bfd_boolean
2499 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2500 {
2501 if (note->descsz != 136)
2502 return FALSE;
2503
2504 elf_tdata (abfd)->core_program
2505 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2506 elf_tdata (abfd)->core_command
2507 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2508
2509 return TRUE;
2510 }
2511
2512 static char *
2513 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2514 ...)
2515 {
2516 switch (note_type)
2517 {
2518 default:
2519 return NULL;
2520
2521 case NT_PRPSINFO:
2522 {
2523 char data[136];
2524 va_list ap;
2525
2526 va_start (ap, note_type);
2527 memset (data, 0, 40);
2528 strncpy (data + 40, va_arg (ap, const char *), 16);
2529 strncpy (data + 56, va_arg (ap, const char *), 80);
2530 va_end (ap);
2531 return elfcore_write_note (abfd, buf, bufsiz,
2532 "CORE", note_type, data, sizeof (data));
2533 }
2534
2535 case NT_PRSTATUS:
2536 {
2537 char data[504];
2538 va_list ap;
2539 long pid;
2540 int cursig;
2541 const void *greg;
2542
2543 va_start (ap, note_type);
2544 memset (data, 0, 112);
2545 pid = va_arg (ap, long);
2546 bfd_put_32 (abfd, pid, data + 32);
2547 cursig = va_arg (ap, int);
2548 bfd_put_16 (abfd, cursig, data + 12);
2549 greg = va_arg (ap, const void *);
2550 memcpy (data + 112, greg, 384);
2551 memset (data + 496, 0, 8);
2552 va_end (ap);
2553 return elfcore_write_note (abfd, buf, bufsiz,
2554 "CORE", note_type, data, sizeof (data));
2555 }
2556 }
2557 }
2558
2559 /* Merge backend specific data from an object file to the output
2560 object file when linking. */
2561
2562 static bfd_boolean
2563 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2564 {
2565 /* Check if we have the same endianess. */
2566 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2567 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2568 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2569 {
2570 const char *msg;
2571
2572 if (bfd_big_endian (ibfd))
2573 msg = _("%B: compiled for a big endian system "
2574 "and target is little endian");
2575 else
2576 msg = _("%B: compiled for a little endian system "
2577 "and target is big endian");
2578
2579 (*_bfd_error_handler) (msg, ibfd);
2580
2581 bfd_set_error (bfd_error_wrong_format);
2582 return FALSE;
2583 }
2584
2585 return TRUE;
2586 }
2587
2588 /* Add extra PPC sections. */
2589
2590 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2591 {
2592 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2593 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2594 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2595 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2596 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2597 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2598 { NULL, 0, 0, 0, 0 }
2599 };
2600
2601 enum _ppc64_sec_type {
2602 sec_normal = 0,
2603 sec_opd = 1,
2604 sec_toc = 2
2605 };
2606
2607 struct _ppc64_elf_section_data
2608 {
2609 struct bfd_elf_section_data elf;
2610
2611 /* An array with one entry for each opd function descriptor. */
2612 union
2613 {
2614 /* Points to the function code section for local opd entries. */
2615 asection **opd_func_sec;
2616 /* After editing .opd, adjust references to opd local syms. */
2617 long *opd_adjust;
2618
2619 /* An array for toc sections, indexed by offset/8.
2620 Specifies the relocation symbol index used at a given toc offset. */
2621 unsigned *t_symndx;
2622 } u;
2623
2624 enum _ppc64_sec_type sec_type:2;
2625
2626 /* Flag set when small branches are detected. Used to
2627 select suitable defaults for the stub group size. */
2628 unsigned int has_14bit_branch:1;
2629 };
2630
2631 #define ppc64_elf_section_data(sec) \
2632 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2633
2634 static bfd_boolean
2635 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2636 {
2637 if (!sec->used_by_bfd)
2638 {
2639 struct _ppc64_elf_section_data *sdata;
2640 bfd_size_type amt = sizeof (*sdata);
2641
2642 sdata = bfd_zalloc (abfd, amt);
2643 if (sdata == NULL)
2644 return FALSE;
2645 sec->used_by_bfd = sdata;
2646 }
2647
2648 return _bfd_elf_new_section_hook (abfd, sec);
2649 }
2650
2651 static void *
2652 get_opd_info (asection * sec)
2653 {
2654 if (sec != NULL
2655 && ppc64_elf_section_data (sec) != NULL
2656 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2657 return ppc64_elf_section_data (sec)->u.opd_adjust;
2658 return NULL;
2659 }
2660 \f
2661 /* Parameters for the qsort hook. */
2662 static asection *synthetic_opd;
2663 static bfd_boolean synthetic_relocatable;
2664
2665 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2666
2667 static int
2668 compare_symbols (const void *ap, const void *bp)
2669 {
2670 const asymbol *a = * (const asymbol **) ap;
2671 const asymbol *b = * (const asymbol **) bp;
2672
2673 /* Section symbols first. */
2674 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2675 return -1;
2676 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2677 return 1;
2678
2679 /* then .opd symbols. */
2680 if (a->section == synthetic_opd && b->section != synthetic_opd)
2681 return -1;
2682 if (a->section != synthetic_opd && b->section == synthetic_opd)
2683 return 1;
2684
2685 /* then other code symbols. */
2686 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2687 == (SEC_CODE | SEC_ALLOC)
2688 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2689 != (SEC_CODE | SEC_ALLOC))
2690 return -1;
2691
2692 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2693 != (SEC_CODE | SEC_ALLOC)
2694 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2695 == (SEC_CODE | SEC_ALLOC))
2696 return 1;
2697
2698 if (synthetic_relocatable)
2699 {
2700 if (a->section->id < b->section->id)
2701 return -1;
2702
2703 if (a->section->id > b->section->id)
2704 return 1;
2705 }
2706
2707 if (a->value + a->section->vma < b->value + b->section->vma)
2708 return -1;
2709
2710 if (a->value + a->section->vma > b->value + b->section->vma)
2711 return 1;
2712
2713 /* For syms with the same value, prefer strong dynamic global function
2714 syms over other syms. */
2715 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2716 return -1;
2717
2718 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2719 return 1;
2720
2721 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2722 return -1;
2723
2724 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2725 return 1;
2726
2727 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2728 return -1;
2729
2730 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2731 return 1;
2732
2733 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2734 return -1;
2735
2736 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2737 return 1;
2738
2739 return 0;
2740 }
2741
2742 /* Search SYMS for a symbol of the given VALUE. */
2743
2744 static asymbol *
2745 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2746 {
2747 long mid;
2748
2749 if (id == -1)
2750 {
2751 while (lo < hi)
2752 {
2753 mid = (lo + hi) >> 1;
2754 if (syms[mid]->value + syms[mid]->section->vma < value)
2755 lo = mid + 1;
2756 else if (syms[mid]->value + syms[mid]->section->vma > value)
2757 hi = mid;
2758 else
2759 return syms[mid];
2760 }
2761 }
2762 else
2763 {
2764 while (lo < hi)
2765 {
2766 mid = (lo + hi) >> 1;
2767 if (syms[mid]->section->id < id)
2768 lo = mid + 1;
2769 else if (syms[mid]->section->id > id)
2770 hi = mid;
2771 else if (syms[mid]->value < value)
2772 lo = mid + 1;
2773 else if (syms[mid]->value > value)
2774 hi = mid;
2775 else
2776 return syms[mid];
2777 }
2778 }
2779 return NULL;
2780 }
2781
2782 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2783 entry syms. */
2784
2785 static long
2786 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2787 long static_count, asymbol **static_syms,
2788 long dyn_count, asymbol **dyn_syms,
2789 asymbol **ret)
2790 {
2791 asymbol *s;
2792 long i;
2793 long count;
2794 char *names;
2795 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2796 asection *opd;
2797 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2798 asymbol **syms;
2799
2800 *ret = NULL;
2801
2802 opd = bfd_get_section_by_name (abfd, ".opd");
2803 if (opd == NULL)
2804 return 0;
2805
2806 symcount = static_count;
2807 if (!relocatable)
2808 symcount += dyn_count;
2809 if (symcount == 0)
2810 return 0;
2811
2812 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2813 if (syms == NULL)
2814 return -1;
2815
2816 if (!relocatable && static_count != 0 && dyn_count != 0)
2817 {
2818 /* Use both symbol tables. */
2819 memcpy (syms, static_syms, static_count * sizeof (*syms));
2820 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2821 }
2822 else if (!relocatable && static_count == 0)
2823 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2824 else
2825 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2826
2827 synthetic_opd = opd;
2828 synthetic_relocatable = relocatable;
2829 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2830
2831 if (!relocatable && symcount > 1)
2832 {
2833 long j;
2834 /* Trim duplicate syms, since we may have merged the normal and
2835 dynamic symbols. Actually, we only care about syms that have
2836 different values, so trim any with the same value. */
2837 for (i = 1, j = 1; i < symcount; ++i)
2838 if (syms[i - 1]->value + syms[i - 1]->section->vma
2839 != syms[i]->value + syms[i]->section->vma)
2840 syms[j++] = syms[i];
2841 symcount = j;
2842 }
2843
2844 i = 0;
2845 if (syms[i]->section == opd)
2846 ++i;
2847 codesecsym = i;
2848
2849 for (; i < symcount; ++i)
2850 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2851 != (SEC_CODE | SEC_ALLOC))
2852 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2853 break;
2854 codesecsymend = i;
2855
2856 for (; i < symcount; ++i)
2857 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2858 break;
2859 secsymend = i;
2860
2861 for (; i < symcount; ++i)
2862 if (syms[i]->section != opd)
2863 break;
2864 opdsymend = i;
2865
2866 for (; i < symcount; ++i)
2867 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2868 != (SEC_CODE | SEC_ALLOC))
2869 break;
2870 symcount = i;
2871
2872 count = 0;
2873 if (opdsymend == secsymend)
2874 goto done;
2875
2876 if (relocatable)
2877 {
2878 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2879 arelent *r;
2880 size_t size;
2881 long relcount;
2882
2883 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2884 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2885 if (relcount == 0)
2886 goto done;
2887
2888 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2889 {
2890 count = -1;
2891 goto done;
2892 }
2893
2894 size = 0;
2895 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2896 {
2897 asymbol *sym;
2898
2899 while (r < opd->relocation + relcount
2900 && r->address < syms[i]->value + opd->vma)
2901 ++r;
2902
2903 if (r == opd->relocation + relcount)
2904 break;
2905
2906 if (r->address != syms[i]->value + opd->vma)
2907 continue;
2908
2909 if (r->howto->type != R_PPC64_ADDR64)
2910 continue;
2911
2912 sym = *r->sym_ptr_ptr;
2913 if (!sym_exists_at (syms, opdsymend, symcount,
2914 sym->section->id, sym->value + r->addend))
2915 {
2916 ++count;
2917 size += sizeof (asymbol);
2918 size += strlen (syms[i]->name) + 2;
2919 }
2920 }
2921
2922 s = *ret = bfd_malloc (size);
2923 if (s == NULL)
2924 {
2925 count = -1;
2926 goto done;
2927 }
2928
2929 names = (char *) (s + count);
2930
2931 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2932 {
2933 asymbol *sym;
2934
2935 while (r < opd->relocation + relcount
2936 && r->address < syms[i]->value + opd->vma)
2937 ++r;
2938
2939 if (r == opd->relocation + relcount)
2940 break;
2941
2942 if (r->address != syms[i]->value + opd->vma)
2943 continue;
2944
2945 if (r->howto->type != R_PPC64_ADDR64)
2946 continue;
2947
2948 sym = *r->sym_ptr_ptr;
2949 if (!sym_exists_at (syms, opdsymend, symcount,
2950 sym->section->id, sym->value + r->addend))
2951 {
2952 size_t len;
2953
2954 *s = *syms[i];
2955 s->section = sym->section;
2956 s->value = sym->value + r->addend;
2957 s->name = names;
2958 *names++ = '.';
2959 len = strlen (syms[i]->name);
2960 memcpy (names, syms[i]->name, len + 1);
2961 names += len + 1;
2962 s++;
2963 }
2964 }
2965 }
2966 else
2967 {
2968 bfd_byte *contents;
2969 size_t size;
2970
2971 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2972 {
2973 if (contents)
2974 {
2975 free_contents_and_exit:
2976 free (contents);
2977 }
2978 count = -1;
2979 goto done;
2980 }
2981
2982 size = 0;
2983 for (i = secsymend; i < opdsymend; ++i)
2984 {
2985 bfd_vma ent;
2986
2987 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2988 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2989 {
2990 ++count;
2991 size += sizeof (asymbol);
2992 size += strlen (syms[i]->name) + 2;
2993 }
2994 }
2995
2996 s = *ret = bfd_malloc (size);
2997 if (s == NULL)
2998 goto free_contents_and_exit;
2999
3000 names = (char *) (s + count);
3001
3002 for (i = secsymend; i < opdsymend; ++i)
3003 {
3004 bfd_vma ent;
3005
3006 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3007 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3008 {
3009 long lo, hi;
3010 size_t len;
3011 asection *sec = abfd->sections;
3012
3013 *s = *syms[i];
3014 lo = codesecsym;
3015 hi = codesecsymend;
3016 while (lo < hi)
3017 {
3018 long mid = (lo + hi) >> 1;
3019 if (syms[mid]->section->vma < ent)
3020 lo = mid + 1;
3021 else if (syms[mid]->section->vma > ent)
3022 hi = mid;
3023 else
3024 {
3025 sec = syms[mid]->section;
3026 break;
3027 }
3028 }
3029
3030 if (lo >= hi && lo > codesecsym)
3031 sec = syms[lo - 1]->section;
3032
3033 for (; sec != NULL; sec = sec->next)
3034 {
3035 if (sec->vma > ent)
3036 break;
3037 if ((sec->flags & SEC_ALLOC) == 0
3038 || (sec->flags & SEC_LOAD) == 0)
3039 break;
3040 if ((sec->flags & SEC_CODE) != 0)
3041 s->section = sec;
3042 }
3043 s->value = ent - s->section->vma;
3044 s->name = names;
3045 *names++ = '.';
3046 len = strlen (syms[i]->name);
3047 memcpy (names, syms[i]->name, len + 1);
3048 names += len + 1;
3049 s++;
3050 }
3051 }
3052 free (contents);
3053 }
3054
3055 done:
3056 free (syms);
3057 return count;
3058 }
3059 \f
3060 /* The following functions are specific to the ELF linker, while
3061 functions above are used generally. Those named ppc64_elf_* are
3062 called by the main ELF linker code. They appear in this file more
3063 or less in the order in which they are called. eg.
3064 ppc64_elf_check_relocs is called early in the link process,
3065 ppc64_elf_finish_dynamic_sections is one of the last functions
3066 called.
3067
3068 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3069 functions have both a function code symbol and a function descriptor
3070 symbol. A call to foo in a relocatable object file looks like:
3071
3072 . .text
3073 . x:
3074 . bl .foo
3075 . nop
3076
3077 The function definition in another object file might be:
3078
3079 . .section .opd
3080 . foo: .quad .foo
3081 . .quad .TOC.@tocbase
3082 . .quad 0
3083 .
3084 . .text
3085 . .foo: blr
3086
3087 When the linker resolves the call during a static link, the branch
3088 unsurprisingly just goes to .foo and the .opd information is unused.
3089 If the function definition is in a shared library, things are a little
3090 different: The call goes via a plt call stub, the opd information gets
3091 copied to the plt, and the linker patches the nop.
3092
3093 . x:
3094 . bl .foo_stub
3095 . ld 2,40(1)
3096 .
3097 .
3098 . .foo_stub:
3099 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3100 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3101 . std 2,40(1) # this is the general idea
3102 . ld 11,0(12)
3103 . ld 2,8(12)
3104 . mtctr 11
3105 . ld 11,16(12)
3106 . bctr
3107 .
3108 . .section .plt
3109 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3110
3111 The "reloc ()" notation is supposed to indicate that the linker emits
3112 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3113 copying.
3114
3115 What are the difficulties here? Well, firstly, the relocations
3116 examined by the linker in check_relocs are against the function code
3117 sym .foo, while the dynamic relocation in the plt is emitted against
3118 the function descriptor symbol, foo. Somewhere along the line, we need
3119 to carefully copy dynamic link information from one symbol to the other.
3120 Secondly, the generic part of the elf linker will make .foo a dynamic
3121 symbol as is normal for most other backends. We need foo dynamic
3122 instead, at least for an application final link. However, when
3123 creating a shared library containing foo, we need to have both symbols
3124 dynamic so that references to .foo are satisfied during the early
3125 stages of linking. Otherwise the linker might decide to pull in a
3126 definition from some other object, eg. a static library.
3127
3128 Update: As of August 2004, we support a new convention. Function
3129 calls may use the function descriptor symbol, ie. "bl foo". This
3130 behaves exactly as "bl .foo". */
3131
3132 /* The linker needs to keep track of the number of relocs that it
3133 decides to copy as dynamic relocs in check_relocs for each symbol.
3134 This is so that it can later discard them if they are found to be
3135 unnecessary. We store the information in a field extending the
3136 regular ELF linker hash table. */
3137
3138 struct ppc_dyn_relocs
3139 {
3140 struct ppc_dyn_relocs *next;
3141
3142 /* The input section of the reloc. */
3143 asection *sec;
3144
3145 /* Total number of relocs copied for the input section. */
3146 bfd_size_type count;
3147
3148 /* Number of pc-relative relocs copied for the input section. */
3149 bfd_size_type pc_count;
3150 };
3151
3152 /* Track GOT entries needed for a given symbol. We might need more
3153 than one got entry per symbol. */
3154 struct got_entry
3155 {
3156 struct got_entry *next;
3157
3158 /* The symbol addend that we'll be placing in the GOT. */
3159 bfd_vma addend;
3160
3161 /* Unlike other ELF targets, we use separate GOT entries for the same
3162 symbol referenced from different input files. This is to support
3163 automatic multiple TOC/GOT sections, where the TOC base can vary
3164 from one input file to another.
3165
3166 Point to the BFD owning this GOT entry. */
3167 bfd *owner;
3168
3169 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3170 TLS_TPREL or TLS_DTPREL for tls entries. */
3171 char tls_type;
3172
3173 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3174 union
3175 {
3176 bfd_signed_vma refcount;
3177 bfd_vma offset;
3178 } got;
3179 };
3180
3181 /* The same for PLT. */
3182 struct plt_entry
3183 {
3184 struct plt_entry *next;
3185
3186 bfd_vma addend;
3187
3188 union
3189 {
3190 bfd_signed_vma refcount;
3191 bfd_vma offset;
3192 } plt;
3193 };
3194
3195 /* Of those relocs that might be copied as dynamic relocs, this macro
3196 selects those that must be copied when linking a shared library,
3197 even when the symbol is local. */
3198
3199 #define MUST_BE_DYN_RELOC(RTYPE) \
3200 ((RTYPE) != R_PPC64_REL32 \
3201 && (RTYPE) != R_PPC64_REL64 \
3202 && (RTYPE) != R_PPC64_REL30)
3203
3204 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3205 copying dynamic variables from a shared lib into an app's dynbss
3206 section, and instead use a dynamic relocation to point into the
3207 shared lib. With code that gcc generates, it's vital that this be
3208 enabled; In the PowerPC64 ABI, the address of a function is actually
3209 the address of a function descriptor, which resides in the .opd
3210 section. gcc uses the descriptor directly rather than going via the
3211 GOT as some other ABI's do, which means that initialized function
3212 pointers must reference the descriptor. Thus, a function pointer
3213 initialized to the address of a function in a shared library will
3214 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3215 redefines the function descriptor symbol to point to the copy. This
3216 presents a problem as a plt entry for that function is also
3217 initialized from the function descriptor symbol and the copy reloc
3218 may not be initialized first. */
3219 #define ELIMINATE_COPY_RELOCS 1
3220
3221 /* Section name for stubs is the associated section name plus this
3222 string. */
3223 #define STUB_SUFFIX ".stub"
3224
3225 /* Linker stubs.
3226 ppc_stub_long_branch:
3227 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3228 destination, but a 24 bit branch in a stub section will reach.
3229 . b dest
3230
3231 ppc_stub_plt_branch:
3232 Similar to the above, but a 24 bit branch in the stub section won't
3233 reach its destination.
3234 . addis %r12,%r2,xxx@toc@ha
3235 . ld %r11,xxx@toc@l(%r12)
3236 . mtctr %r11
3237 . bctr
3238
3239 ppc_stub_plt_call:
3240 Used to call a function in a shared library. If it so happens that
3241 the plt entry referenced crosses a 64k boundary, then an extra
3242 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3243 . addis %r12,%r2,xxx@toc@ha
3244 . std %r2,40(%r1)
3245 . ld %r11,xxx+0@toc@l(%r12)
3246 . mtctr %r11
3247 . ld %r2,xxx+8@toc@l(%r12)
3248 . ld %r11,xxx+16@toc@l(%r12)
3249 . bctr
3250
3251 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3252 code to adjust the value and save r2 to support multiple toc sections.
3253 A ppc_stub_long_branch with an r2 offset looks like:
3254 . std %r2,40(%r1)
3255 . addis %r2,%r2,off@ha
3256 . addi %r2,%r2,off@l
3257 . b dest
3258
3259 A ppc_stub_plt_branch with an r2 offset looks like:
3260 . std %r2,40(%r1)
3261 . addis %r12,%r2,xxx@toc@ha
3262 . ld %r11,xxx@toc@l(%r12)
3263 . addis %r2,%r2,off@ha
3264 . addi %r2,%r2,off@l
3265 . mtctr %r11
3266 . bctr
3267
3268 In cases where the "addis" instruction would add zero, the "addis" is
3269 omitted and following instructions modified slightly in some cases.
3270 */
3271
3272 enum ppc_stub_type {
3273 ppc_stub_none,
3274 ppc_stub_long_branch,
3275 ppc_stub_long_branch_r2off,
3276 ppc_stub_plt_branch,
3277 ppc_stub_plt_branch_r2off,
3278 ppc_stub_plt_call
3279 };
3280
3281 struct ppc_stub_hash_entry {
3282
3283 /* Base hash table entry structure. */
3284 struct bfd_hash_entry root;
3285
3286 enum ppc_stub_type stub_type;
3287
3288 /* The stub section. */
3289 asection *stub_sec;
3290
3291 /* Offset within stub_sec of the beginning of this stub. */
3292 bfd_vma stub_offset;
3293
3294 /* Given the symbol's value and its section we can determine its final
3295 value when building the stubs (so the stub knows where to jump. */
3296 bfd_vma target_value;
3297 asection *target_section;
3298
3299 /* The symbol table entry, if any, that this was derived from. */
3300 struct ppc_link_hash_entry *h;
3301
3302 /* And the reloc addend that this was derived from. */
3303 bfd_vma addend;
3304
3305 /* Where this stub is being called from, or, in the case of combined
3306 stub sections, the first input section in the group. */
3307 asection *id_sec;
3308 };
3309
3310 struct ppc_branch_hash_entry {
3311
3312 /* Base hash table entry structure. */
3313 struct bfd_hash_entry root;
3314
3315 /* Offset within branch lookup table. */
3316 unsigned int offset;
3317
3318 /* Generation marker. */
3319 unsigned int iter;
3320 };
3321
3322 struct ppc_link_hash_entry
3323 {
3324 struct elf_link_hash_entry elf;
3325
3326 union {
3327 /* A pointer to the most recently used stub hash entry against this
3328 symbol. */
3329 struct ppc_stub_hash_entry *stub_cache;
3330
3331 /* A pointer to the next symbol starting with a '.' */
3332 struct ppc_link_hash_entry *next_dot_sym;
3333 } u;
3334
3335 /* Track dynamic relocs copied for this symbol. */
3336 struct ppc_dyn_relocs *dyn_relocs;
3337
3338 /* Link between function code and descriptor symbols. */
3339 struct ppc_link_hash_entry *oh;
3340
3341 /* Flag function code and descriptor symbols. */
3342 unsigned int is_func:1;
3343 unsigned int is_func_descriptor:1;
3344 unsigned int fake:1;
3345
3346 /* Whether global opd/toc sym has been adjusted or not.
3347 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3348 should be set for all globals defined in any opd/toc section. */
3349 unsigned int adjust_done:1;
3350
3351 /* Set if we twiddled this symbol to weak at some stage. */
3352 unsigned int was_undefined:1;
3353
3354 /* Contexts in which symbol is used in the GOT (or TOC).
3355 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3356 corresponding relocs are encountered during check_relocs.
3357 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3358 indicate the corresponding GOT entry type is not needed.
3359 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3360 a TPREL one. We use a separate flag rather than setting TPREL
3361 just for convenience in distinguishing the two cases. */
3362 #define TLS_GD 1 /* GD reloc. */
3363 #define TLS_LD 2 /* LD reloc. */
3364 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3365 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3366 #define TLS_TLS 16 /* Any TLS reloc. */
3367 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3368 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3369 char tls_mask;
3370 };
3371
3372 /* ppc64 ELF linker hash table. */
3373
3374 struct ppc_link_hash_table
3375 {
3376 struct elf_link_hash_table elf;
3377
3378 /* The stub hash table. */
3379 struct bfd_hash_table stub_hash_table;
3380
3381 /* Another hash table for plt_branch stubs. */
3382 struct bfd_hash_table branch_hash_table;
3383
3384 /* Linker stub bfd. */
3385 bfd *stub_bfd;
3386
3387 /* Linker call-backs. */
3388 asection * (*add_stub_section) (const char *, asection *);
3389 void (*layout_sections_again) (void);
3390
3391 /* Array to keep track of which stub sections have been created, and
3392 information on stub grouping. */
3393 struct map_stub {
3394 /* This is the section to which stubs in the group will be attached. */
3395 asection *link_sec;
3396 /* The stub section. */
3397 asection *stub_sec;
3398 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3399 bfd_vma toc_off;
3400 } *stub_group;
3401
3402 /* Temp used when calculating TOC pointers. */
3403 bfd_vma toc_curr;
3404
3405 /* Highest input section id. */
3406 int top_id;
3407
3408 /* Highest output section index. */
3409 int top_index;
3410
3411 /* Used when adding symbols. */
3412 struct ppc_link_hash_entry *dot_syms;
3413
3414 /* List of input sections for each output section. */
3415 asection **input_list;
3416
3417 /* Short-cuts to get to dynamic linker sections. */
3418 asection *got;
3419 asection *plt;
3420 asection *relplt;
3421 asection *dynbss;
3422 asection *relbss;
3423 asection *glink;
3424 asection *sfpr;
3425 asection *brlt;
3426 asection *relbrlt;
3427
3428 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3429 struct ppc_link_hash_entry *tls_get_addr;
3430 struct ppc_link_hash_entry *tls_get_addr_fd;
3431
3432 /* Statistics. */
3433 unsigned long stub_count[ppc_stub_plt_call];
3434
3435 /* Number of stubs against global syms. */
3436 unsigned long stub_globals;
3437
3438 /* Set if we should emit symbols for stubs. */
3439 unsigned int emit_stub_syms:1;
3440
3441 /* Support for multiple toc sections. */
3442 unsigned int no_multi_toc:1;
3443 unsigned int multi_toc_needed:1;
3444
3445 /* Set on error. */
3446 unsigned int stub_error:1;
3447
3448 /* Temp used by ppc64_elf_check_directives. */
3449 unsigned int twiddled_syms:1;
3450
3451 /* Incremented every time we size stubs. */
3452 unsigned int stub_iteration;
3453
3454 /* Small local sym to section mapping cache. */
3455 struct sym_sec_cache sym_sec;
3456 };
3457
3458 /* Rename some of the generic section flags to better document how they
3459 are used here. */
3460 #define has_toc_reloc has_gp_reloc
3461 #define makes_toc_func_call need_finalize_relax
3462 #define call_check_in_progress reloc_done
3463
3464 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3465
3466 #define ppc_hash_table(p) \
3467 ((struct ppc_link_hash_table *) ((p)->hash))
3468
3469 #define ppc_stub_hash_lookup(table, string, create, copy) \
3470 ((struct ppc_stub_hash_entry *) \
3471 bfd_hash_lookup ((table), (string), (create), (copy)))
3472
3473 #define ppc_branch_hash_lookup(table, string, create, copy) \
3474 ((struct ppc_branch_hash_entry *) \
3475 bfd_hash_lookup ((table), (string), (create), (copy)))
3476
3477 /* Create an entry in the stub hash table. */
3478
3479 static struct bfd_hash_entry *
3480 stub_hash_newfunc (struct bfd_hash_entry *entry,
3481 struct bfd_hash_table *table,
3482 const char *string)
3483 {
3484 /* Allocate the structure if it has not already been allocated by a
3485 subclass. */
3486 if (entry == NULL)
3487 {
3488 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3489 if (entry == NULL)
3490 return entry;
3491 }
3492
3493 /* Call the allocation method of the superclass. */
3494 entry = bfd_hash_newfunc (entry, table, string);
3495 if (entry != NULL)
3496 {
3497 struct ppc_stub_hash_entry *eh;
3498
3499 /* Initialize the local fields. */
3500 eh = (struct ppc_stub_hash_entry *) entry;
3501 eh->stub_type = ppc_stub_none;
3502 eh->stub_sec = NULL;
3503 eh->stub_offset = 0;
3504 eh->target_value = 0;
3505 eh->target_section = NULL;
3506 eh->h = NULL;
3507 eh->id_sec = NULL;
3508 }
3509
3510 return entry;
3511 }
3512
3513 /* Create an entry in the branch hash table. */
3514
3515 static struct bfd_hash_entry *
3516 branch_hash_newfunc (struct bfd_hash_entry *entry,
3517 struct bfd_hash_table *table,
3518 const char *string)
3519 {
3520 /* Allocate the structure if it has not already been allocated by a
3521 subclass. */
3522 if (entry == NULL)
3523 {
3524 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3525 if (entry == NULL)
3526 return entry;
3527 }
3528
3529 /* Call the allocation method of the superclass. */
3530 entry = bfd_hash_newfunc (entry, table, string);
3531 if (entry != NULL)
3532 {
3533 struct ppc_branch_hash_entry *eh;
3534
3535 /* Initialize the local fields. */
3536 eh = (struct ppc_branch_hash_entry *) entry;
3537 eh->offset = 0;
3538 eh->iter = 0;
3539 }
3540
3541 return entry;
3542 }
3543
3544 /* Create an entry in a ppc64 ELF linker hash table. */
3545
3546 static struct bfd_hash_entry *
3547 link_hash_newfunc (struct bfd_hash_entry *entry,
3548 struct bfd_hash_table *table,
3549 const char *string)
3550 {
3551 /* Allocate the structure if it has not already been allocated by a
3552 subclass. */
3553 if (entry == NULL)
3554 {
3555 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3556 if (entry == NULL)
3557 return entry;
3558 }
3559
3560 /* Call the allocation method of the superclass. */
3561 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3562 if (entry != NULL)
3563 {
3564 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3565
3566 memset (&eh->u.stub_cache, 0,
3567 (sizeof (struct ppc_link_hash_entry)
3568 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3569
3570 /* When making function calls, old ABI code references function entry
3571 points (dot symbols), while new ABI code references the function
3572 descriptor symbol. We need to make any combination of reference and
3573 definition work together, without breaking archive linking.
3574
3575 For a defined function "foo" and an undefined call to "bar":
3576 An old object defines "foo" and ".foo", references ".bar" (possibly
3577 "bar" too).
3578 A new object defines "foo" and references "bar".
3579
3580 A new object thus has no problem with its undefined symbols being
3581 satisfied by definitions in an old object. On the other hand, the
3582 old object won't have ".bar" satisfied by a new object.
3583
3584 Keep a list of newly added dot-symbols. */
3585
3586 if (string[0] == '.')
3587 {
3588 struct ppc_link_hash_table *htab;
3589
3590 htab = (struct ppc_link_hash_table *) table;
3591 eh->u.next_dot_sym = htab->dot_syms;
3592 htab->dot_syms = eh;
3593 }
3594 }
3595
3596 return entry;
3597 }
3598
3599 /* Create a ppc64 ELF linker hash table. */
3600
3601 static struct bfd_link_hash_table *
3602 ppc64_elf_link_hash_table_create (bfd *abfd)
3603 {
3604 struct ppc_link_hash_table *htab;
3605 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3606
3607 htab = bfd_zmalloc (amt);
3608 if (htab == NULL)
3609 return NULL;
3610
3611 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3612 sizeof (struct ppc_link_hash_entry)))
3613 {
3614 free (htab);
3615 return NULL;
3616 }
3617
3618 /* Init the stub hash table too. */
3619 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3620 sizeof (struct ppc_stub_hash_entry)))
3621 return NULL;
3622
3623 /* And the branch hash table. */
3624 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3625 sizeof (struct ppc_branch_hash_entry)))
3626 return NULL;
3627
3628 /* Initializing two fields of the union is just cosmetic. We really
3629 only care about glist, but when compiled on a 32-bit host the
3630 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3631 debugger inspection of these fields look nicer. */
3632 htab->elf.init_got_refcount.refcount = 0;
3633 htab->elf.init_got_refcount.glist = NULL;
3634 htab->elf.init_plt_refcount.refcount = 0;
3635 htab->elf.init_plt_refcount.glist = NULL;
3636 htab->elf.init_got_offset.offset = 0;
3637 htab->elf.init_got_offset.glist = NULL;
3638 htab->elf.init_plt_offset.offset = 0;
3639 htab->elf.init_plt_offset.glist = NULL;
3640
3641 return &htab->elf.root;
3642 }
3643
3644 /* Free the derived linker hash table. */
3645
3646 static void
3647 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3648 {
3649 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3650
3651 bfd_hash_table_free (&ret->stub_hash_table);
3652 bfd_hash_table_free (&ret->branch_hash_table);
3653 _bfd_generic_link_hash_table_free (hash);
3654 }
3655
3656 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3657
3658 void
3659 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3660 {
3661 struct ppc_link_hash_table *htab;
3662
3663 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3664
3665 /* Always hook our dynamic sections into the first bfd, which is the
3666 linker created stub bfd. This ensures that the GOT header is at
3667 the start of the output TOC section. */
3668 htab = ppc_hash_table (info);
3669 htab->stub_bfd = abfd;
3670 htab->elf.dynobj = abfd;
3671 }
3672
3673 /* Build a name for an entry in the stub hash table. */
3674
3675 static char *
3676 ppc_stub_name (const asection *input_section,
3677 const asection *sym_sec,
3678 const struct ppc_link_hash_entry *h,
3679 const Elf_Internal_Rela *rel)
3680 {
3681 char *stub_name;
3682 bfd_size_type len;
3683
3684 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3685 offsets from a sym as a branch target? In fact, we could
3686 probably assume the addend is always zero. */
3687 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3688
3689 if (h)
3690 {
3691 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3692 stub_name = bfd_malloc (len);
3693 if (stub_name == NULL)
3694 return stub_name;
3695
3696 sprintf (stub_name, "%08x.%s+%x",
3697 input_section->id & 0xffffffff,
3698 h->elf.root.root.string,
3699 (int) rel->r_addend & 0xffffffff);
3700 }
3701 else
3702 {
3703 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3704 stub_name = bfd_malloc (len);
3705 if (stub_name == NULL)
3706 return stub_name;
3707
3708 sprintf (stub_name, "%08x.%x:%x+%x",
3709 input_section->id & 0xffffffff,
3710 sym_sec->id & 0xffffffff,
3711 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3712 (int) rel->r_addend & 0xffffffff);
3713 }
3714 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3715 stub_name[len - 2] = 0;
3716 return stub_name;
3717 }
3718
3719 /* Look up an entry in the stub hash. Stub entries are cached because
3720 creating the stub name takes a bit of time. */
3721
3722 static struct ppc_stub_hash_entry *
3723 ppc_get_stub_entry (const asection *input_section,
3724 const asection *sym_sec,
3725 struct ppc_link_hash_entry *h,
3726 const Elf_Internal_Rela *rel,
3727 struct ppc_link_hash_table *htab)
3728 {
3729 struct ppc_stub_hash_entry *stub_entry;
3730 const asection *id_sec;
3731
3732 /* If this input section is part of a group of sections sharing one
3733 stub section, then use the id of the first section in the group.
3734 Stub names need to include a section id, as there may well be
3735 more than one stub used to reach say, printf, and we need to
3736 distinguish between them. */
3737 id_sec = htab->stub_group[input_section->id].link_sec;
3738
3739 if (h != NULL && h->u.stub_cache != NULL
3740 && h->u.stub_cache->h == h
3741 && h->u.stub_cache->id_sec == id_sec)
3742 {
3743 stub_entry = h->u.stub_cache;
3744 }
3745 else
3746 {
3747 char *stub_name;
3748
3749 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3750 if (stub_name == NULL)
3751 return NULL;
3752
3753 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3754 stub_name, FALSE, FALSE);
3755 if (h != NULL)
3756 h->u.stub_cache = stub_entry;
3757
3758 free (stub_name);
3759 }
3760
3761 return stub_entry;
3762 }
3763
3764 /* Add a new stub entry to the stub hash. Not all fields of the new
3765 stub entry are initialised. */
3766
3767 static struct ppc_stub_hash_entry *
3768 ppc_add_stub (const char *stub_name,
3769 asection *section,
3770 struct ppc_link_hash_table *htab)
3771 {
3772 asection *link_sec;
3773 asection *stub_sec;
3774 struct ppc_stub_hash_entry *stub_entry;
3775
3776 link_sec = htab->stub_group[section->id].link_sec;
3777 stub_sec = htab->stub_group[section->id].stub_sec;
3778 if (stub_sec == NULL)
3779 {
3780 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3781 if (stub_sec == NULL)
3782 {
3783 size_t namelen;
3784 bfd_size_type len;
3785 char *s_name;
3786
3787 namelen = strlen (link_sec->name);
3788 len = namelen + sizeof (STUB_SUFFIX);
3789 s_name = bfd_alloc (htab->stub_bfd, len);
3790 if (s_name == NULL)
3791 return NULL;
3792
3793 memcpy (s_name, link_sec->name, namelen);
3794 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3795 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3796 if (stub_sec == NULL)
3797 return NULL;
3798 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3799 }
3800 htab->stub_group[section->id].stub_sec = stub_sec;
3801 }
3802
3803 /* Enter this entry into the linker stub hash table. */
3804 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3805 TRUE, FALSE);
3806 if (stub_entry == NULL)
3807 {
3808 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3809 section->owner, stub_name);
3810 return NULL;
3811 }
3812
3813 stub_entry->stub_sec = stub_sec;
3814 stub_entry->stub_offset = 0;
3815 stub_entry->id_sec = link_sec;
3816 return stub_entry;
3817 }
3818
3819 /* Create sections for linker generated code. */
3820
3821 static bfd_boolean
3822 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3823 {
3824 struct ppc_link_hash_table *htab;
3825 flagword flags;
3826
3827 htab = ppc_hash_table (info);
3828
3829 /* Create .sfpr for code to save and restore fp regs. */
3830 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3831 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3832 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3833 flags);
3834 if (htab->sfpr == NULL
3835 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3836 return FALSE;
3837
3838 /* Create .glink for lazy dynamic linking support. */
3839 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3840 flags);
3841 if (htab->glink == NULL
3842 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3843 return FALSE;
3844
3845 /* Create branch lookup table for plt_branch stubs. */
3846 flags = (SEC_ALLOC | SEC_LOAD
3847 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3848 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3849 flags);
3850 if (htab->brlt == NULL
3851 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3852 return FALSE;
3853
3854 if (!info->shared)
3855 return TRUE;
3856
3857 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3858 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3859 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3860 ".rela.branch_lt",
3861 flags);
3862 if (!htab->relbrlt
3863 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3864 return FALSE;
3865
3866 return TRUE;
3867 }
3868
3869 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3870 not already done. */
3871
3872 static bfd_boolean
3873 create_got_section (bfd *abfd, struct bfd_link_info *info)
3874 {
3875 asection *got, *relgot;
3876 flagword flags;
3877 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3878
3879 if (!htab->got)
3880 {
3881 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3882 return FALSE;
3883
3884 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3885 if (!htab->got)
3886 abort ();
3887 }
3888
3889 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3890 | SEC_LINKER_CREATED);
3891
3892 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3893 if (!got
3894 || !bfd_set_section_alignment (abfd, got, 3))
3895 return FALSE;
3896
3897 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3898 flags | SEC_READONLY);
3899 if (!relgot
3900 || ! bfd_set_section_alignment (abfd, relgot, 3))
3901 return FALSE;
3902
3903 ppc64_elf_tdata (abfd)->got = got;
3904 ppc64_elf_tdata (abfd)->relgot = relgot;
3905 return TRUE;
3906 }
3907
3908 /* Create the dynamic sections, and set up shortcuts. */
3909
3910 static bfd_boolean
3911 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3912 {
3913 struct ppc_link_hash_table *htab;
3914
3915 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3916 return FALSE;
3917
3918 htab = ppc_hash_table (info);
3919 if (!htab->got)
3920 htab->got = bfd_get_section_by_name (dynobj, ".got");
3921 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3922 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3923 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3924 if (!info->shared)
3925 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3926
3927 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3928 || (!info->shared && !htab->relbss))
3929 abort ();
3930
3931 return TRUE;
3932 }
3933
3934 /* Merge PLT info on FROM with that on TO. */
3935
3936 static void
3937 move_plt_plist (struct ppc_link_hash_entry *from,
3938 struct ppc_link_hash_entry *to)
3939 {
3940 if (from->elf.plt.plist != NULL)
3941 {
3942 if (to->elf.plt.plist != NULL)
3943 {
3944 struct plt_entry **entp;
3945 struct plt_entry *ent;
3946
3947 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3948 {
3949 struct plt_entry *dent;
3950
3951 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3952 if (dent->addend == ent->addend)
3953 {
3954 dent->plt.refcount += ent->plt.refcount;
3955 *entp = ent->next;
3956 break;
3957 }
3958 if (dent == NULL)
3959 entp = &ent->next;
3960 }
3961 *entp = to->elf.plt.plist;
3962 }
3963
3964 to->elf.plt.plist = from->elf.plt.plist;
3965 from->elf.plt.plist = NULL;
3966 }
3967 }
3968
3969 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3970
3971 static void
3972 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3973 struct elf_link_hash_entry *dir,
3974 struct elf_link_hash_entry *ind)
3975 {
3976 struct ppc_link_hash_entry *edir, *eind;
3977
3978 edir = (struct ppc_link_hash_entry *) dir;
3979 eind = (struct ppc_link_hash_entry *) ind;
3980
3981 /* Copy over any dynamic relocs we may have on the indirect sym. */
3982 if (eind->dyn_relocs != NULL)
3983 {
3984 if (edir->dyn_relocs != NULL)
3985 {
3986 struct ppc_dyn_relocs **pp;
3987 struct ppc_dyn_relocs *p;
3988
3989 /* Add reloc counts against the indirect sym to the direct sym
3990 list. Merge any entries against the same section. */
3991 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3992 {
3993 struct ppc_dyn_relocs *q;
3994
3995 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3996 if (q->sec == p->sec)
3997 {
3998 q->pc_count += p->pc_count;
3999 q->count += p->count;
4000 *pp = p->next;
4001 break;
4002 }
4003 if (q == NULL)
4004 pp = &p->next;
4005 }
4006 *pp = edir->dyn_relocs;
4007 }
4008
4009 edir->dyn_relocs = eind->dyn_relocs;
4010 eind->dyn_relocs = NULL;
4011 }
4012
4013 edir->is_func |= eind->is_func;
4014 edir->is_func_descriptor |= eind->is_func_descriptor;
4015 edir->tls_mask |= eind->tls_mask;
4016
4017 /* If called to transfer flags for a weakdef during processing
4018 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4019 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4020 if (!(ELIMINATE_COPY_RELOCS
4021 && eind->elf.root.type != bfd_link_hash_indirect
4022 && edir->elf.dynamic_adjusted))
4023 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4024
4025 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4026 edir->elf.ref_regular |= eind->elf.ref_regular;
4027 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4028 edir->elf.needs_plt |= eind->elf.needs_plt;
4029
4030 /* If we were called to copy over info for a weak sym, that's all. */
4031 if (eind->elf.root.type != bfd_link_hash_indirect)
4032 return;
4033
4034 /* Copy over got entries that we may have already seen to the
4035 symbol which just became indirect. */
4036 if (eind->elf.got.glist != NULL)
4037 {
4038 if (edir->elf.got.glist != NULL)
4039 {
4040 struct got_entry **entp;
4041 struct got_entry *ent;
4042
4043 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4044 {
4045 struct got_entry *dent;
4046
4047 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4048 if (dent->addend == ent->addend
4049 && dent->owner == ent->owner
4050 && dent->tls_type == ent->tls_type)
4051 {
4052 dent->got.refcount += ent->got.refcount;
4053 *entp = ent->next;
4054 break;
4055 }
4056 if (dent == NULL)
4057 entp = &ent->next;
4058 }
4059 *entp = edir->elf.got.glist;
4060 }
4061
4062 edir->elf.got.glist = eind->elf.got.glist;
4063 eind->elf.got.glist = NULL;
4064 }
4065
4066 /* And plt entries. */
4067 move_plt_plist (eind, edir);
4068
4069 if (eind->elf.dynindx != -1)
4070 {
4071 if (edir->elf.dynindx != -1)
4072 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4073 edir->elf.dynstr_index);
4074 edir->elf.dynindx = eind->elf.dynindx;
4075 edir->elf.dynstr_index = eind->elf.dynstr_index;
4076 eind->elf.dynindx = -1;
4077 eind->elf.dynstr_index = 0;
4078 }
4079 }
4080
4081 /* Find the function descriptor hash entry from the given function code
4082 hash entry FH. Link the entries via their OH fields. */
4083
4084 static struct ppc_link_hash_entry *
4085 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4086 {
4087 struct ppc_link_hash_entry *fdh = fh->oh;
4088
4089 if (fdh == NULL)
4090 {
4091 const char *fd_name = fh->elf.root.root.string + 1;
4092
4093 fdh = (struct ppc_link_hash_entry *)
4094 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4095 if (fdh != NULL)
4096 {
4097 fdh->is_func_descriptor = 1;
4098 fdh->oh = fh;
4099 fh->is_func = 1;
4100 fh->oh = fdh;
4101 }
4102 }
4103
4104 return fdh;
4105 }
4106
4107 /* Make a fake function descriptor sym for the code sym FH. */
4108
4109 static struct ppc_link_hash_entry *
4110 make_fdh (struct bfd_link_info *info,
4111 struct ppc_link_hash_entry *fh)
4112 {
4113 bfd *abfd;
4114 asymbol *newsym;
4115 struct bfd_link_hash_entry *bh;
4116 struct ppc_link_hash_entry *fdh;
4117
4118 abfd = fh->elf.root.u.undef.abfd;
4119 newsym = bfd_make_empty_symbol (abfd);
4120 newsym->name = fh->elf.root.root.string + 1;
4121 newsym->section = bfd_und_section_ptr;
4122 newsym->value = 0;
4123 newsym->flags = BSF_WEAK;
4124
4125 bh = NULL;
4126 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4127 newsym->flags, newsym->section,
4128 newsym->value, NULL, FALSE, FALSE,
4129 &bh))
4130 return NULL;
4131
4132 fdh = (struct ppc_link_hash_entry *) bh;
4133 fdh->elf.non_elf = 0;
4134 fdh->fake = 1;
4135 fdh->is_func_descriptor = 1;
4136 fdh->oh = fh;
4137 fh->is_func = 1;
4138 fh->oh = fdh;
4139 return fdh;
4140 }
4141
4142 /* Fix function descriptor symbols defined in .opd sections to be
4143 function type. */
4144
4145 static bfd_boolean
4146 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4147 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4148 Elf_Internal_Sym *isym,
4149 const char **name ATTRIBUTE_UNUSED,
4150 flagword *flags ATTRIBUTE_UNUSED,
4151 asection **sec,
4152 bfd_vma *value ATTRIBUTE_UNUSED)
4153 {
4154 if (*sec != NULL
4155 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4156 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4157
4158 return TRUE;
4159 }
4160
4161 /* This function makes an old ABI object reference to ".bar" cause the
4162 inclusion of a new ABI object archive that defines "bar".
4163 NAME is a symbol defined in an archive. Return a symbol in the hash
4164 table that might be satisfied by the archive symbols. */
4165
4166 static struct elf_link_hash_entry *
4167 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4168 struct bfd_link_info *info,
4169 const char *name)
4170 {
4171 struct elf_link_hash_entry *h;
4172 char *dot_name;
4173 size_t len;
4174
4175 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4176 if (h != NULL
4177 /* Don't return this sym if it is a fake function descriptor
4178 created by add_symbol_adjust. */
4179 && !(h->root.type == bfd_link_hash_undefweak
4180 && ((struct ppc_link_hash_entry *) h)->fake))
4181 return h;
4182
4183 if (name[0] == '.')
4184 return h;
4185
4186 len = strlen (name);
4187 dot_name = bfd_alloc (abfd, len + 2);
4188 if (dot_name == NULL)
4189 return (struct elf_link_hash_entry *) 0 - 1;
4190 dot_name[0] = '.';
4191 memcpy (dot_name + 1, name, len + 1);
4192 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4193 bfd_release (abfd, dot_name);
4194 return h;
4195 }
4196
4197 /* This function satisfies all old ABI object references to ".bar" if a
4198 new ABI object defines "bar". Well, at least, undefined dot symbols
4199 are made weak. This stops later archive searches from including an
4200 object if we already have a function descriptor definition. It also
4201 prevents the linker complaining about undefined symbols.
4202 We also check and correct mismatched symbol visibility here. The
4203 most restrictive visibility of the function descriptor and the
4204 function entry symbol is used. */
4205
4206 static bfd_boolean
4207 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4208 {
4209 struct ppc_link_hash_table *htab;
4210 struct ppc_link_hash_entry *fdh;
4211
4212 if (eh->elf.root.type == bfd_link_hash_indirect)
4213 return TRUE;
4214
4215 if (eh->elf.root.type == bfd_link_hash_warning)
4216 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4217
4218 if (eh->elf.root.root.string[0] != '.')
4219 abort ();
4220
4221 htab = ppc_hash_table (info);
4222 fdh = get_fdh (eh, htab);
4223 if (fdh == NULL
4224 && !info->relocatable
4225 && (eh->elf.root.type == bfd_link_hash_undefined
4226 || eh->elf.root.type == bfd_link_hash_undefweak)
4227 && eh->elf.ref_regular)
4228 {
4229 /* Make an undefweak function descriptor sym, which is enough to
4230 pull in an --as-needed shared lib, but won't cause link
4231 errors. Archives are handled elsewhere. */
4232 fdh = make_fdh (info, eh);
4233 if (fdh == NULL)
4234 return FALSE;
4235 else
4236 fdh->elf.ref_regular = 1;
4237 }
4238 else if (fdh != NULL)
4239 {
4240 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4241 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4242 if (entry_vis < descr_vis)
4243 fdh->elf.other += entry_vis - descr_vis;
4244 else if (entry_vis > descr_vis)
4245 eh->elf.other += descr_vis - entry_vis;
4246
4247 if ((fdh->elf.root.type == bfd_link_hash_defined
4248 || fdh->elf.root.type == bfd_link_hash_defweak)
4249 && eh->elf.root.type == bfd_link_hash_undefined)
4250 {
4251 eh->elf.root.type = bfd_link_hash_undefweak;
4252 eh->was_undefined = 1;
4253 htab->twiddled_syms = 1;
4254 }
4255 }
4256
4257 return TRUE;
4258 }
4259
4260 /* Process list of dot-symbols we made in link_hash_newfunc. */
4261
4262 static bfd_boolean
4263 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4264 {
4265 struct ppc_link_hash_table *htab;
4266 struct ppc_link_hash_entry **p, *eh;
4267
4268 htab = ppc_hash_table (info);
4269 if (!is_ppc64_elf_target (htab->elf.root.creator))
4270 return TRUE;
4271
4272 if (is_ppc64_elf_target (ibfd->xvec))
4273 {
4274 p = &htab->dot_syms;
4275 while ((eh = *p) != NULL)
4276 {
4277 *p = NULL;
4278 if (!add_symbol_adjust (eh, info))
4279 return FALSE;
4280 p = &eh->u.next_dot_sym;
4281 }
4282 }
4283
4284 /* Clear the list for non-ppc64 input files. */
4285 p = &htab->dot_syms;
4286 while ((eh = *p) != NULL)
4287 {
4288 *p = NULL;
4289 p = &eh->u.next_dot_sym;
4290 }
4291
4292 /* We need to fix the undefs list for any syms we have twiddled to
4293 undef_weak. */
4294 if (htab->twiddled_syms)
4295 {
4296 bfd_link_repair_undef_list (&htab->elf.root);
4297 htab->twiddled_syms = 0;
4298 }
4299 return TRUE;
4300 }
4301
4302 /* Undo hash table changes when an --as-needed input file is determined
4303 not to be needed. */
4304
4305 static bfd_boolean
4306 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4307 struct bfd_link_info *info)
4308 {
4309 ppc_hash_table (info)->dot_syms = NULL;
4310 return TRUE;
4311 }
4312
4313 static bfd_boolean
4314 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4315 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4316 {
4317 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4318 char *local_got_tls_masks;
4319
4320 if (local_got_ents == NULL)
4321 {
4322 bfd_size_type size = symtab_hdr->sh_info;
4323
4324 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4325 local_got_ents = bfd_zalloc (abfd, size);
4326 if (local_got_ents == NULL)
4327 return FALSE;
4328 elf_local_got_ents (abfd) = local_got_ents;
4329 }
4330
4331 if ((tls_type & TLS_EXPLICIT) == 0)
4332 {
4333 struct got_entry *ent;
4334
4335 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4336 if (ent->addend == r_addend
4337 && ent->owner == abfd
4338 && ent->tls_type == tls_type)
4339 break;
4340 if (ent == NULL)
4341 {
4342 bfd_size_type amt = sizeof (*ent);
4343 ent = bfd_alloc (abfd, amt);
4344 if (ent == NULL)
4345 return FALSE;
4346 ent->next = local_got_ents[r_symndx];
4347 ent->addend = r_addend;
4348 ent->owner = abfd;
4349 ent->tls_type = tls_type;
4350 ent->got.refcount = 0;
4351 local_got_ents[r_symndx] = ent;
4352 }
4353 ent->got.refcount += 1;
4354 }
4355
4356 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4357 local_got_tls_masks[r_symndx] |= tls_type;
4358 return TRUE;
4359 }
4360
4361 static bfd_boolean
4362 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4363 {
4364 struct plt_entry *ent;
4365
4366 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4367 if (ent->addend == addend)
4368 break;
4369 if (ent == NULL)
4370 {
4371 bfd_size_type amt = sizeof (*ent);
4372 ent = bfd_alloc (abfd, amt);
4373 if (ent == NULL)
4374 return FALSE;
4375 ent->next = eh->elf.plt.plist;
4376 ent->addend = addend;
4377 ent->plt.refcount = 0;
4378 eh->elf.plt.plist = ent;
4379 }
4380 ent->plt.refcount += 1;
4381 eh->elf.needs_plt = 1;
4382 if (eh->elf.root.root.string[0] == '.'
4383 && eh->elf.root.root.string[1] != '\0')
4384 eh->is_func = 1;
4385 return TRUE;
4386 }
4387
4388 /* Look through the relocs for a section during the first phase, and
4389 calculate needed space in the global offset table, procedure
4390 linkage table, and dynamic reloc sections. */
4391
4392 static bfd_boolean
4393 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4394 asection *sec, const Elf_Internal_Rela *relocs)
4395 {
4396 struct ppc_link_hash_table *htab;
4397 Elf_Internal_Shdr *symtab_hdr;
4398 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4399 const Elf_Internal_Rela *rel;
4400 const Elf_Internal_Rela *rel_end;
4401 asection *sreloc;
4402 asection **opd_sym_map;
4403
4404 if (info->relocatable)
4405 return TRUE;
4406
4407 /* Don't do anything special with non-loaded, non-alloced sections.
4408 In particular, any relocs in such sections should not affect GOT
4409 and PLT reference counting (ie. we don't allow them to create GOT
4410 or PLT entries), there's no possibility or desire to optimize TLS
4411 relocs, and there's not much point in propagating relocs to shared
4412 libs that the dynamic linker won't relocate. */
4413 if ((sec->flags & SEC_ALLOC) == 0)
4414 return TRUE;
4415
4416 htab = ppc_hash_table (info);
4417 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4418
4419 sym_hashes = elf_sym_hashes (abfd);
4420 sym_hashes_end = (sym_hashes
4421 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4422 - symtab_hdr->sh_info);
4423
4424 sreloc = NULL;
4425 opd_sym_map = NULL;
4426 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4427 {
4428 /* Garbage collection needs some extra help with .opd sections.
4429 We don't want to necessarily keep everything referenced by
4430 relocs in .opd, as that would keep all functions. Instead,
4431 if we reference an .opd symbol (a function descriptor), we
4432 want to keep the function code symbol's section. This is
4433 easy for global symbols, but for local syms we need to keep
4434 information about the associated function section. Later, if
4435 edit_opd deletes entries, we'll use this array to adjust
4436 local syms in .opd. */
4437 union opd_info {
4438 asection *func_section;
4439 long entry_adjust;
4440 };
4441 bfd_size_type amt;
4442
4443 amt = sec->size * sizeof (union opd_info) / 8;
4444 opd_sym_map = bfd_zalloc (abfd, amt);
4445 if (opd_sym_map == NULL)
4446 return FALSE;
4447 ppc64_elf_section_data (sec)->u.opd_func_sec = opd_sym_map;
4448 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4449 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4450 }
4451
4452 if (htab->sfpr == NULL
4453 && !create_linkage_sections (htab->elf.dynobj, info))
4454 return FALSE;
4455
4456 rel_end = relocs + sec->reloc_count;
4457 for (rel = relocs; rel < rel_end; rel++)
4458 {
4459 unsigned long r_symndx;
4460 struct elf_link_hash_entry *h;
4461 enum elf_ppc64_reloc_type r_type;
4462 int tls_type = 0;
4463 struct _ppc64_elf_section_data *ppc64_sec;
4464
4465 r_symndx = ELF64_R_SYM (rel->r_info);
4466 if (r_symndx < symtab_hdr->sh_info)
4467 h = NULL;
4468 else
4469 {
4470 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4471 while (h->root.type == bfd_link_hash_indirect
4472 || h->root.type == bfd_link_hash_warning)
4473 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4474 }
4475
4476 r_type = ELF64_R_TYPE (rel->r_info);
4477 switch (r_type)
4478 {
4479 case R_PPC64_GOT_TLSLD16:
4480 case R_PPC64_GOT_TLSLD16_LO:
4481 case R_PPC64_GOT_TLSLD16_HI:
4482 case R_PPC64_GOT_TLSLD16_HA:
4483 ppc64_tlsld_got (abfd)->refcount += 1;
4484 tls_type = TLS_TLS | TLS_LD;
4485 goto dogottls;
4486
4487 case R_PPC64_GOT_TLSGD16:
4488 case R_PPC64_GOT_TLSGD16_LO:
4489 case R_PPC64_GOT_TLSGD16_HI:
4490 case R_PPC64_GOT_TLSGD16_HA:
4491 tls_type = TLS_TLS | TLS_GD;
4492 goto dogottls;
4493
4494 case R_PPC64_GOT_TPREL16_DS:
4495 case R_PPC64_GOT_TPREL16_LO_DS:
4496 case R_PPC64_GOT_TPREL16_HI:
4497 case R_PPC64_GOT_TPREL16_HA:
4498 if (info->shared)
4499 info->flags |= DF_STATIC_TLS;
4500 tls_type = TLS_TLS | TLS_TPREL;
4501 goto dogottls;
4502
4503 case R_PPC64_GOT_DTPREL16_DS:
4504 case R_PPC64_GOT_DTPREL16_LO_DS:
4505 case R_PPC64_GOT_DTPREL16_HI:
4506 case R_PPC64_GOT_DTPREL16_HA:
4507 tls_type = TLS_TLS | TLS_DTPREL;
4508 dogottls:
4509 sec->has_tls_reloc = 1;
4510 /* Fall thru */
4511
4512 case R_PPC64_GOT16:
4513 case R_PPC64_GOT16_DS:
4514 case R_PPC64_GOT16_HA:
4515 case R_PPC64_GOT16_HI:
4516 case R_PPC64_GOT16_LO:
4517 case R_PPC64_GOT16_LO_DS:
4518 /* This symbol requires a global offset table entry. */
4519 sec->has_toc_reloc = 1;
4520 if (ppc64_elf_tdata (abfd)->got == NULL
4521 && !create_got_section (abfd, info))
4522 return FALSE;
4523
4524 if (h != NULL)
4525 {
4526 struct ppc_link_hash_entry *eh;
4527 struct got_entry *ent;
4528
4529 eh = (struct ppc_link_hash_entry *) h;
4530 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4531 if (ent->addend == rel->r_addend
4532 && ent->owner == abfd
4533 && ent->tls_type == tls_type)
4534 break;
4535 if (ent == NULL)
4536 {
4537 bfd_size_type amt = sizeof (*ent);
4538 ent = bfd_alloc (abfd, amt);
4539 if (ent == NULL)
4540 return FALSE;
4541 ent->next = eh->elf.got.glist;
4542 ent->addend = rel->r_addend;
4543 ent->owner = abfd;
4544 ent->tls_type = tls_type;
4545 ent->got.refcount = 0;
4546 eh->elf.got.glist = ent;
4547 }
4548 ent->got.refcount += 1;
4549 eh->tls_mask |= tls_type;
4550 }
4551 else
4552 /* This is a global offset table entry for a local symbol. */
4553 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4554 rel->r_addend, tls_type))
4555 return FALSE;
4556 break;
4557
4558 case R_PPC64_PLT16_HA:
4559 case R_PPC64_PLT16_HI:
4560 case R_PPC64_PLT16_LO:
4561 case R_PPC64_PLT32:
4562 case R_PPC64_PLT64:
4563 /* This symbol requires a procedure linkage table entry. We
4564 actually build the entry in adjust_dynamic_symbol,
4565 because this might be a case of linking PIC code without
4566 linking in any dynamic objects, in which case we don't
4567 need to generate a procedure linkage table after all. */
4568 if (h == NULL)
4569 {
4570 /* It does not make sense to have a procedure linkage
4571 table entry for a local symbol. */
4572 bfd_set_error (bfd_error_bad_value);
4573 return FALSE;
4574 }
4575 else
4576 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4577 rel->r_addend))
4578 return FALSE;
4579 break;
4580
4581 /* The following relocations don't need to propagate the
4582 relocation if linking a shared object since they are
4583 section relative. */
4584 case R_PPC64_SECTOFF:
4585 case R_PPC64_SECTOFF_LO:
4586 case R_PPC64_SECTOFF_HI:
4587 case R_PPC64_SECTOFF_HA:
4588 case R_PPC64_SECTOFF_DS:
4589 case R_PPC64_SECTOFF_LO_DS:
4590 case R_PPC64_DTPREL16:
4591 case R_PPC64_DTPREL16_LO:
4592 case R_PPC64_DTPREL16_HI:
4593 case R_PPC64_DTPREL16_HA:
4594 case R_PPC64_DTPREL16_DS:
4595 case R_PPC64_DTPREL16_LO_DS:
4596 case R_PPC64_DTPREL16_HIGHER:
4597 case R_PPC64_DTPREL16_HIGHERA:
4598 case R_PPC64_DTPREL16_HIGHEST:
4599 case R_PPC64_DTPREL16_HIGHESTA:
4600 break;
4601
4602 /* Nor do these. */
4603 case R_PPC64_TOC16:
4604 case R_PPC64_TOC16_LO:
4605 case R_PPC64_TOC16_HI:
4606 case R_PPC64_TOC16_HA:
4607 case R_PPC64_TOC16_DS:
4608 case R_PPC64_TOC16_LO_DS:
4609 sec->has_toc_reloc = 1;
4610 break;
4611
4612 /* This relocation describes the C++ object vtable hierarchy.
4613 Reconstruct it for later use during GC. */
4614 case R_PPC64_GNU_VTINHERIT:
4615 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4616 return FALSE;
4617 break;
4618
4619 /* This relocation describes which C++ vtable entries are actually
4620 used. Record for later use during GC. */
4621 case R_PPC64_GNU_VTENTRY:
4622 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4623 return FALSE;
4624 break;
4625
4626 case R_PPC64_REL14:
4627 case R_PPC64_REL14_BRTAKEN:
4628 case R_PPC64_REL14_BRNTAKEN:
4629 {
4630 asection *dest = NULL;
4631
4632 /* Heuristic: If jumping outside our section, chances are
4633 we are going to need a stub. */
4634 if (h != NULL)
4635 {
4636 /* If the sym is weak it may be overridden later, so
4637 don't assume we know where a weak sym lives. */
4638 if (h->root.type == bfd_link_hash_defined)
4639 dest = h->root.u.def.section;
4640 }
4641 else
4642 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4643 sec, r_symndx);
4644 if (dest != sec)
4645 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4646 }
4647 /* Fall through. */
4648
4649 case R_PPC64_REL24:
4650 if (h != NULL)
4651 {
4652 /* We may need a .plt entry if the function this reloc
4653 refers to is in a shared lib. */
4654 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4655 rel->r_addend))
4656 return FALSE;
4657 if (h == &htab->tls_get_addr->elf
4658 || h == &htab->tls_get_addr_fd->elf)
4659 sec->has_tls_reloc = 1;
4660 else if (htab->tls_get_addr == NULL
4661 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4662 && (h->root.root.string[15] == 0
4663 || h->root.root.string[15] == '@'))
4664 {
4665 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4666 sec->has_tls_reloc = 1;
4667 }
4668 else if (htab->tls_get_addr_fd == NULL
4669 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4670 && (h->root.root.string[14] == 0
4671 || h->root.root.string[14] == '@'))
4672 {
4673 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4674 sec->has_tls_reloc = 1;
4675 }
4676 }
4677 break;
4678
4679 case R_PPC64_TPREL64:
4680 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4681 if (info->shared)
4682 info->flags |= DF_STATIC_TLS;
4683 goto dotlstoc;
4684
4685 case R_PPC64_DTPMOD64:
4686 if (rel + 1 < rel_end
4687 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4688 && rel[1].r_offset == rel->r_offset + 8)
4689 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4690 else
4691 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4692 goto dotlstoc;
4693
4694 case R_PPC64_DTPREL64:
4695 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4696 if (rel != relocs
4697 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4698 && rel[-1].r_offset == rel->r_offset - 8)
4699 /* This is the second reloc of a dtpmod, dtprel pair.
4700 Don't mark with TLS_DTPREL. */
4701 goto dodyn;
4702
4703 dotlstoc:
4704 sec->has_tls_reloc = 1;
4705 if (h != NULL)
4706 {
4707 struct ppc_link_hash_entry *eh;
4708 eh = (struct ppc_link_hash_entry *) h;
4709 eh->tls_mask |= tls_type;
4710 }
4711 else
4712 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4713 rel->r_addend, tls_type))
4714 return FALSE;
4715
4716 ppc64_sec = ppc64_elf_section_data (sec);
4717 if (ppc64_sec->sec_type != sec_toc)
4718 {
4719 /* One extra to simplify get_tls_mask. */
4720 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4721 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4722 if (ppc64_sec->u.t_symndx == NULL)
4723 return FALSE;
4724 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4725 ppc64_sec->sec_type = sec_toc;
4726 }
4727 BFD_ASSERT (rel->r_offset % 8 == 0);
4728 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4729
4730 /* Mark the second slot of a GD or LD entry.
4731 -1 to indicate GD and -2 to indicate LD. */
4732 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4733 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4734 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4735 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4736 goto dodyn;
4737
4738 case R_PPC64_TPREL16:
4739 case R_PPC64_TPREL16_LO:
4740 case R_PPC64_TPREL16_HI:
4741 case R_PPC64_TPREL16_HA:
4742 case R_PPC64_TPREL16_DS:
4743 case R_PPC64_TPREL16_LO_DS:
4744 case R_PPC64_TPREL16_HIGHER:
4745 case R_PPC64_TPREL16_HIGHERA:
4746 case R_PPC64_TPREL16_HIGHEST:
4747 case R_PPC64_TPREL16_HIGHESTA:
4748 if (info->shared)
4749 {
4750 info->flags |= DF_STATIC_TLS;
4751 goto dodyn;
4752 }
4753 break;
4754
4755 case R_PPC64_ADDR64:
4756 if (opd_sym_map != NULL
4757 && rel + 1 < rel_end
4758 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4759 {
4760 if (h != NULL)
4761 {
4762 if (h->root.root.string[0] == '.'
4763 && h->root.root.string[1] != 0
4764 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4765 ;
4766 else
4767 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4768 }
4769 else
4770 {
4771 asection *s;
4772
4773 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4774 r_symndx);
4775 if (s == NULL)
4776 return FALSE;
4777 else if (s != sec)
4778 opd_sym_map[rel->r_offset / 8] = s;
4779 }
4780 }
4781 /* Fall through. */
4782
4783 case R_PPC64_REL30:
4784 case R_PPC64_REL32:
4785 case R_PPC64_REL64:
4786 case R_PPC64_ADDR14:
4787 case R_PPC64_ADDR14_BRNTAKEN:
4788 case R_PPC64_ADDR14_BRTAKEN:
4789 case R_PPC64_ADDR16:
4790 case R_PPC64_ADDR16_DS:
4791 case R_PPC64_ADDR16_HA:
4792 case R_PPC64_ADDR16_HI:
4793 case R_PPC64_ADDR16_HIGHER:
4794 case R_PPC64_ADDR16_HIGHERA:
4795 case R_PPC64_ADDR16_HIGHEST:
4796 case R_PPC64_ADDR16_HIGHESTA:
4797 case R_PPC64_ADDR16_LO:
4798 case R_PPC64_ADDR16_LO_DS:
4799 case R_PPC64_ADDR24:
4800 case R_PPC64_ADDR32:
4801 case R_PPC64_UADDR16:
4802 case R_PPC64_UADDR32:
4803 case R_PPC64_UADDR64:
4804 case R_PPC64_TOC:
4805 if (h != NULL && !info->shared)
4806 /* We may need a copy reloc. */
4807 h->non_got_ref = 1;
4808
4809 /* Don't propagate .opd relocs. */
4810 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4811 break;
4812
4813 /* If we are creating a shared library, and this is a reloc
4814 against a global symbol, or a non PC relative reloc
4815 against a local symbol, then we need to copy the reloc
4816 into the shared library. However, if we are linking with
4817 -Bsymbolic, we do not need to copy a reloc against a
4818 global symbol which is defined in an object we are
4819 including in the link (i.e., DEF_REGULAR is set). At
4820 this point we have not seen all the input files, so it is
4821 possible that DEF_REGULAR is not set now but will be set
4822 later (it is never cleared). In case of a weak definition,
4823 DEF_REGULAR may be cleared later by a strong definition in
4824 a shared library. We account for that possibility below by
4825 storing information in the dyn_relocs field of the hash
4826 table entry. A similar situation occurs when creating
4827 shared libraries and symbol visibility changes render the
4828 symbol local.
4829
4830 If on the other hand, we are creating an executable, we
4831 may need to keep relocations for symbols satisfied by a
4832 dynamic library if we manage to avoid copy relocs for the
4833 symbol. */
4834 dodyn:
4835 if ((info->shared
4836 && (MUST_BE_DYN_RELOC (r_type)
4837 || (h != NULL
4838 && (! info->symbolic
4839 || h->root.type == bfd_link_hash_defweak
4840 || !h->def_regular))))
4841 || (ELIMINATE_COPY_RELOCS
4842 && !info->shared
4843 && h != NULL
4844 && (h->root.type == bfd_link_hash_defweak
4845 || !h->def_regular)))
4846 {
4847 struct ppc_dyn_relocs *p;
4848 struct ppc_dyn_relocs **head;
4849
4850 /* We must copy these reloc types into the output file.
4851 Create a reloc section in dynobj and make room for
4852 this reloc. */
4853 if (sreloc == NULL)
4854 {
4855 const char *name;
4856 bfd *dynobj;
4857
4858 name = (bfd_elf_string_from_elf_section
4859 (abfd,
4860 elf_elfheader (abfd)->e_shstrndx,
4861 elf_section_data (sec)->rel_hdr.sh_name));
4862 if (name == NULL)
4863 return FALSE;
4864
4865 if (! CONST_STRNEQ (name, ".rela")
4866 || strcmp (bfd_get_section_name (abfd, sec),
4867 name + 5) != 0)
4868 {
4869 (*_bfd_error_handler)
4870 (_("%B: bad relocation section name `%s\'"),
4871 abfd, name);
4872 bfd_set_error (bfd_error_bad_value);
4873 }
4874
4875 dynobj = htab->elf.dynobj;
4876 sreloc = bfd_get_section_by_name (dynobj, name);
4877 if (sreloc == NULL)
4878 {
4879 flagword flags;
4880
4881 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4882 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4883 | SEC_ALLOC | SEC_LOAD);
4884 sreloc = bfd_make_section_with_flags (dynobj,
4885 name,
4886 flags);
4887 if (sreloc == NULL
4888 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4889 return FALSE;
4890 }
4891 elf_section_data (sec)->sreloc = sreloc;
4892 }
4893
4894 /* If this is a global symbol, we count the number of
4895 relocations we need for this symbol. */
4896 if (h != NULL)
4897 {
4898 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4899 }
4900 else
4901 {
4902 /* Track dynamic relocs needed for local syms too.
4903 We really need local syms available to do this
4904 easily. Oh well. */
4905
4906 asection *s;
4907 void *vpp;
4908
4909 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4910 sec, r_symndx);
4911 if (s == NULL)
4912 return FALSE;
4913
4914 vpp = &elf_section_data (s)->local_dynrel;
4915 head = (struct ppc_dyn_relocs **) vpp;
4916 }
4917
4918 p = *head;
4919 if (p == NULL || p->sec != sec)
4920 {
4921 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4922 if (p == NULL)
4923 return FALSE;
4924 p->next = *head;
4925 *head = p;
4926 p->sec = sec;
4927 p->count = 0;
4928 p->pc_count = 0;
4929 }
4930
4931 p->count += 1;
4932 if (!MUST_BE_DYN_RELOC (r_type))
4933 p->pc_count += 1;
4934 }
4935 break;
4936
4937 default:
4938 break;
4939 }
4940 }
4941
4942 return TRUE;
4943 }
4944
4945 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4946 of the code entry point, and its section. */
4947
4948 static bfd_vma
4949 opd_entry_value (asection *opd_sec,
4950 bfd_vma offset,
4951 asection **code_sec,
4952 bfd_vma *code_off)
4953 {
4954 bfd *opd_bfd = opd_sec->owner;
4955 Elf_Internal_Rela *relocs;
4956 Elf_Internal_Rela *lo, *hi, *look;
4957 bfd_vma val;
4958
4959 /* No relocs implies we are linking a --just-symbols object. */
4960 if (opd_sec->reloc_count == 0)
4961 {
4962 bfd_vma val;
4963
4964 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4965 return (bfd_vma) -1;
4966
4967 if (code_sec != NULL)
4968 {
4969 asection *sec, *likely = NULL;
4970 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4971 if (sec->vma <= val
4972 && (sec->flags & SEC_LOAD) != 0
4973 && (sec->flags & SEC_ALLOC) != 0)
4974 likely = sec;
4975 if (likely != NULL)
4976 {
4977 *code_sec = likely;
4978 if (code_off != NULL)
4979 *code_off = val - likely->vma;
4980 }
4981 }
4982 return val;
4983 }
4984
4985 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4986 if (relocs == NULL)
4987 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4988
4989 /* Go find the opd reloc at the sym address. */
4990 lo = relocs;
4991 BFD_ASSERT (lo != NULL);
4992 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4993 val = (bfd_vma) -1;
4994 while (lo < hi)
4995 {
4996 look = lo + (hi - lo) / 2;
4997 if (look->r_offset < offset)
4998 lo = look + 1;
4999 else if (look->r_offset > offset)
5000 hi = look;
5001 else
5002 {
5003 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
5004 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5005 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5006 {
5007 unsigned long symndx = ELF64_R_SYM (look->r_info);
5008 asection *sec;
5009
5010 if (symndx < symtab_hdr->sh_info)
5011 {
5012 Elf_Internal_Sym *sym;
5013
5014 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5015 if (sym == NULL)
5016 {
5017 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5018 symtab_hdr->sh_info,
5019 0, NULL, NULL, NULL);
5020 if (sym == NULL)
5021 break;
5022 symtab_hdr->contents = (bfd_byte *) sym;
5023 }
5024
5025 sym += symndx;
5026 val = sym->st_value;
5027 sec = NULL;
5028 if ((sym->st_shndx != SHN_UNDEF
5029 && sym->st_shndx < SHN_LORESERVE)
5030 || sym->st_shndx > SHN_HIRESERVE)
5031 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5032 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5033 }
5034 else
5035 {
5036 struct elf_link_hash_entry **sym_hashes;
5037 struct elf_link_hash_entry *rh;
5038
5039 sym_hashes = elf_sym_hashes (opd_bfd);
5040 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5041 while (rh->root.type == bfd_link_hash_indirect
5042 || rh->root.type == bfd_link_hash_warning)
5043 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5044 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5045 || rh->root.type == bfd_link_hash_defweak);
5046 val = rh->root.u.def.value;
5047 sec = rh->root.u.def.section;
5048 }
5049 val += look->r_addend;
5050 if (code_off != NULL)
5051 *code_off = val;
5052 if (code_sec != NULL)
5053 *code_sec = sec;
5054 if (sec != NULL && sec->output_section != NULL)
5055 val += sec->output_section->vma + sec->output_offset;
5056 }
5057 break;
5058 }
5059 }
5060
5061 return val;
5062 }
5063
5064 /* Mark sections containing dynamically referenced symbols. When
5065 building shared libraries, we must assume that any visible symbol is
5066 referenced. */
5067
5068 static bfd_boolean
5069 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5070 {
5071 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5072 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5073
5074 if (eh->elf.root.type == bfd_link_hash_warning)
5075 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5076
5077 /* Dynamic linking info is on the func descriptor sym. */
5078 if (eh->oh != NULL
5079 && eh->oh->is_func_descriptor
5080 && (eh->oh->elf.root.type == bfd_link_hash_defined
5081 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5082 eh = eh->oh;
5083
5084 if ((eh->elf.root.type == bfd_link_hash_defined
5085 || eh->elf.root.type == bfd_link_hash_defweak)
5086 && (eh->elf.ref_dynamic
5087 || (!info->executable
5088 && eh->elf.def_regular
5089 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5090 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5091 {
5092 asection *code_sec;
5093
5094 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5095
5096 /* Function descriptor syms cause the associated
5097 function code sym section to be marked. */
5098 if (eh->is_func_descriptor
5099 && (eh->oh->elf.root.type == bfd_link_hash_defined
5100 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5101 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5102 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5103 && opd_entry_value (eh->elf.root.u.def.section,
5104 eh->elf.root.u.def.value,
5105 &code_sec, NULL) != (bfd_vma) -1)
5106 code_sec->flags |= SEC_KEEP;
5107 }
5108
5109 return TRUE;
5110 }
5111
5112 /* Return the section that should be marked against GC for a given
5113 relocation. */
5114
5115 static asection *
5116 ppc64_elf_gc_mark_hook (asection *sec,
5117 struct bfd_link_info *info,
5118 Elf_Internal_Rela *rel,
5119 struct elf_link_hash_entry *h,
5120 Elf_Internal_Sym *sym)
5121 {
5122 asection *rsec;
5123
5124 /* First mark all our entry sym sections. */
5125 if (info->gc_sym_list != NULL)
5126 {
5127 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5128 struct bfd_sym_chain *sym = info->gc_sym_list;
5129
5130 info->gc_sym_list = NULL;
5131 for (; sym != NULL; sym = sym->next)
5132 {
5133 struct ppc_link_hash_entry *eh;
5134
5135 eh = (struct ppc_link_hash_entry *)
5136 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5137 if (eh == NULL)
5138 continue;
5139 if (eh->elf.root.type != bfd_link_hash_defined
5140 && eh->elf.root.type != bfd_link_hash_defweak)
5141 continue;
5142
5143 if (eh->is_func_descriptor
5144 && (eh->oh->elf.root.type == bfd_link_hash_defined
5145 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5146 rsec = eh->oh->elf.root.u.def.section;
5147 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5148 && opd_entry_value (eh->elf.root.u.def.section,
5149 eh->elf.root.u.def.value,
5150 &rsec, NULL) != (bfd_vma) -1)
5151 ;
5152 else
5153 continue;
5154
5155 if (!rsec->gc_mark)
5156 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5157
5158 rsec = eh->elf.root.u.def.section;
5159 if (!rsec->gc_mark)
5160 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5161 }
5162 }
5163
5164 /* Syms return NULL if we're marking .opd, so we avoid marking all
5165 function sections, as all functions are referenced in .opd. */
5166 rsec = NULL;
5167 if (get_opd_info (sec) != NULL)
5168 return rsec;
5169
5170 if (h != NULL)
5171 {
5172 enum elf_ppc64_reloc_type r_type;
5173 struct ppc_link_hash_entry *eh;
5174
5175 r_type = ELF64_R_TYPE (rel->r_info);
5176 switch (r_type)
5177 {
5178 case R_PPC64_GNU_VTINHERIT:
5179 case R_PPC64_GNU_VTENTRY:
5180 break;
5181
5182 default:
5183 switch (h->root.type)
5184 {
5185 case bfd_link_hash_defined:
5186 case bfd_link_hash_defweak:
5187 eh = (struct ppc_link_hash_entry *) h;
5188 if (eh->oh != NULL
5189 && eh->oh->is_func_descriptor
5190 && (eh->oh->elf.root.type == bfd_link_hash_defined
5191 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5192 eh = eh->oh;
5193
5194 /* Function descriptor syms cause the associated
5195 function code sym section to be marked. */
5196 if (eh->is_func_descriptor
5197 && (eh->oh->elf.root.type == bfd_link_hash_defined
5198 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5199 {
5200 /* They also mark their opd section. */
5201 if (!eh->elf.root.u.def.section->gc_mark)
5202 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5203 ppc64_elf_gc_mark_hook);
5204
5205 rsec = eh->oh->elf.root.u.def.section;
5206 }
5207 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5208 && opd_entry_value (eh->elf.root.u.def.section,
5209 eh->elf.root.u.def.value,
5210 &rsec, NULL) != (bfd_vma) -1)
5211 {
5212 if (!eh->elf.root.u.def.section->gc_mark)
5213 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5214 ppc64_elf_gc_mark_hook);
5215 }
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 asection **opd_sym_section;
5232
5233 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5234 opd_sym_section = get_opd_info (rsec);
5235 if (opd_sym_section != NULL)
5236 {
5237 if (!rsec->gc_mark)
5238 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5239
5240 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5241 }
5242 }
5243
5244 return rsec;
5245 }
5246
5247 /* Update the .got, .plt. and dynamic reloc reference counts for the
5248 section being removed. */
5249
5250 static bfd_boolean
5251 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5252 asection *sec, const Elf_Internal_Rela *relocs)
5253 {
5254 struct ppc_link_hash_table *htab;
5255 Elf_Internal_Shdr *symtab_hdr;
5256 struct elf_link_hash_entry **sym_hashes;
5257 struct got_entry **local_got_ents;
5258 const Elf_Internal_Rela *rel, *relend;
5259
5260 if ((sec->flags & SEC_ALLOC) == 0)
5261 return TRUE;
5262
5263 elf_section_data (sec)->local_dynrel = NULL;
5264
5265 htab = ppc_hash_table (info);
5266 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5267 sym_hashes = elf_sym_hashes (abfd);
5268 local_got_ents = elf_local_got_ents (abfd);
5269
5270 relend = relocs + sec->reloc_count;
5271 for (rel = relocs; rel < relend; rel++)
5272 {
5273 unsigned long r_symndx;
5274 enum elf_ppc64_reloc_type r_type;
5275 struct elf_link_hash_entry *h = NULL;
5276 char tls_type = 0;
5277
5278 r_symndx = ELF64_R_SYM (rel->r_info);
5279 r_type = ELF64_R_TYPE (rel->r_info);
5280 if (r_symndx >= symtab_hdr->sh_info)
5281 {
5282 struct ppc_link_hash_entry *eh;
5283 struct ppc_dyn_relocs **pp;
5284 struct ppc_dyn_relocs *p;
5285
5286 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5287 while (h->root.type == bfd_link_hash_indirect
5288 || h->root.type == bfd_link_hash_warning)
5289 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5290 eh = (struct ppc_link_hash_entry *) h;
5291
5292 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5293 if (p->sec == sec)
5294 {
5295 /* Everything must go for SEC. */
5296 *pp = p->next;
5297 break;
5298 }
5299 }
5300
5301 switch (r_type)
5302 {
5303 case R_PPC64_GOT_TLSLD16:
5304 case R_PPC64_GOT_TLSLD16_LO:
5305 case R_PPC64_GOT_TLSLD16_HI:
5306 case R_PPC64_GOT_TLSLD16_HA:
5307 ppc64_tlsld_got (abfd)->refcount -= 1;
5308 tls_type = TLS_TLS | TLS_LD;
5309 goto dogot;
5310
5311 case R_PPC64_GOT_TLSGD16:
5312 case R_PPC64_GOT_TLSGD16_LO:
5313 case R_PPC64_GOT_TLSGD16_HI:
5314 case R_PPC64_GOT_TLSGD16_HA:
5315 tls_type = TLS_TLS | TLS_GD;
5316 goto dogot;
5317
5318 case R_PPC64_GOT_TPREL16_DS:
5319 case R_PPC64_GOT_TPREL16_LO_DS:
5320 case R_PPC64_GOT_TPREL16_HI:
5321 case R_PPC64_GOT_TPREL16_HA:
5322 tls_type = TLS_TLS | TLS_TPREL;
5323 goto dogot;
5324
5325 case R_PPC64_GOT_DTPREL16_DS:
5326 case R_PPC64_GOT_DTPREL16_LO_DS:
5327 case R_PPC64_GOT_DTPREL16_HI:
5328 case R_PPC64_GOT_DTPREL16_HA:
5329 tls_type = TLS_TLS | TLS_DTPREL;
5330 goto dogot;
5331
5332 case R_PPC64_GOT16:
5333 case R_PPC64_GOT16_DS:
5334 case R_PPC64_GOT16_HA:
5335 case R_PPC64_GOT16_HI:
5336 case R_PPC64_GOT16_LO:
5337 case R_PPC64_GOT16_LO_DS:
5338 dogot:
5339 {
5340 struct got_entry *ent;
5341
5342 if (h != NULL)
5343 ent = h->got.glist;
5344 else
5345 ent = local_got_ents[r_symndx];
5346
5347 for (; ent != NULL; ent = ent->next)
5348 if (ent->addend == rel->r_addend
5349 && ent->owner == abfd
5350 && ent->tls_type == tls_type)
5351 break;
5352 if (ent == NULL)
5353 abort ();
5354 if (ent->got.refcount > 0)
5355 ent->got.refcount -= 1;
5356 }
5357 break;
5358
5359 case R_PPC64_PLT16_HA:
5360 case R_PPC64_PLT16_HI:
5361 case R_PPC64_PLT16_LO:
5362 case R_PPC64_PLT32:
5363 case R_PPC64_PLT64:
5364 case R_PPC64_REL14:
5365 case R_PPC64_REL14_BRNTAKEN:
5366 case R_PPC64_REL14_BRTAKEN:
5367 case R_PPC64_REL24:
5368 if (h != NULL)
5369 {
5370 struct plt_entry *ent;
5371
5372 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5373 if (ent->addend == rel->r_addend)
5374 break;
5375 if (ent == NULL)
5376 abort ();
5377 if (ent->plt.refcount > 0)
5378 ent->plt.refcount -= 1;
5379 }
5380 break;
5381
5382 default:
5383 break;
5384 }
5385 }
5386 return TRUE;
5387 }
5388
5389 /* The maximum size of .sfpr. */
5390 #define SFPR_MAX (218*4)
5391
5392 struct sfpr_def_parms
5393 {
5394 const char name[12];
5395 unsigned char lo, hi;
5396 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5397 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5398 };
5399
5400 /* Auto-generate _save*, _rest* functions in .sfpr. */
5401
5402 static unsigned int
5403 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5404 {
5405 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5406 unsigned int i;
5407 size_t len = strlen (parm->name);
5408 bfd_boolean writing = FALSE;
5409 char sym[16];
5410
5411 memcpy (sym, parm->name, len);
5412 sym[len + 2] = 0;
5413
5414 for (i = parm->lo; i <= parm->hi; i++)
5415 {
5416 struct elf_link_hash_entry *h;
5417
5418 sym[len + 0] = i / 10 + '0';
5419 sym[len + 1] = i % 10 + '0';
5420 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5421 if (h != NULL
5422 && !h->def_regular)
5423 {
5424 h->root.type = bfd_link_hash_defined;
5425 h->root.u.def.section = htab->sfpr;
5426 h->root.u.def.value = htab->sfpr->size;
5427 h->type = STT_FUNC;
5428 h->def_regular = 1;
5429 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5430 writing = TRUE;
5431 if (htab->sfpr->contents == NULL)
5432 {
5433 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5434 if (htab->sfpr->contents == NULL)
5435 return FALSE;
5436 }
5437 }
5438 if (writing)
5439 {
5440 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5441 if (i != parm->hi)
5442 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5443 else
5444 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5445 htab->sfpr->size = p - htab->sfpr->contents;
5446 }
5447 }
5448
5449 return TRUE;
5450 }
5451
5452 static bfd_byte *
5453 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5454 {
5455 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5456 return p + 4;
5457 }
5458
5459 static bfd_byte *
5460 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5461 {
5462 p = savegpr0 (abfd, p, r);
5463 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5464 p = p + 4;
5465 bfd_put_32 (abfd, BLR, p);
5466 return p + 4;
5467 }
5468
5469 static bfd_byte *
5470 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5471 {
5472 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5473 return p + 4;
5474 }
5475
5476 static bfd_byte *
5477 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5478 {
5479 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5480 p = p + 4;
5481 p = restgpr0 (abfd, p, r);
5482 bfd_put_32 (abfd, MTLR_R0, p);
5483 p = p + 4;
5484 if (r == 29)
5485 {
5486 p = restgpr0 (abfd, p, 30);
5487 p = restgpr0 (abfd, p, 31);
5488 }
5489 bfd_put_32 (abfd, BLR, p);
5490 return p + 4;
5491 }
5492
5493 static bfd_byte *
5494 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5495 {
5496 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5497 return p + 4;
5498 }
5499
5500 static bfd_byte *
5501 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5502 {
5503 p = savegpr1 (abfd, p, r);
5504 bfd_put_32 (abfd, BLR, p);
5505 return p + 4;
5506 }
5507
5508 static bfd_byte *
5509 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5510 {
5511 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5512 return p + 4;
5513 }
5514
5515 static bfd_byte *
5516 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5517 {
5518 p = restgpr1 (abfd, p, r);
5519 bfd_put_32 (abfd, BLR, p);
5520 return p + 4;
5521 }
5522
5523 static bfd_byte *
5524 savefpr (bfd *abfd, bfd_byte *p, int r)
5525 {
5526 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5527 return p + 4;
5528 }
5529
5530 static bfd_byte *
5531 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5532 {
5533 p = savefpr (abfd, p, r);
5534 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5535 p = p + 4;
5536 bfd_put_32 (abfd, BLR, p);
5537 return p + 4;
5538 }
5539
5540 static bfd_byte *
5541 restfpr (bfd *abfd, bfd_byte *p, int r)
5542 {
5543 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5544 return p + 4;
5545 }
5546
5547 static bfd_byte *
5548 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5549 {
5550 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5551 p = p + 4;
5552 p = restfpr (abfd, p, r);
5553 bfd_put_32 (abfd, MTLR_R0, p);
5554 p = p + 4;
5555 if (r == 29)
5556 {
5557 p = restfpr (abfd, p, 30);
5558 p = restfpr (abfd, p, 31);
5559 }
5560 bfd_put_32 (abfd, BLR, p);
5561 return p + 4;
5562 }
5563
5564 static bfd_byte *
5565 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5566 {
5567 p = savefpr (abfd, p, r);
5568 bfd_put_32 (abfd, BLR, p);
5569 return p + 4;
5570 }
5571
5572 static bfd_byte *
5573 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5574 {
5575 p = restfpr (abfd, p, r);
5576 bfd_put_32 (abfd, BLR, p);
5577 return p + 4;
5578 }
5579
5580 static bfd_byte *
5581 savevr (bfd *abfd, bfd_byte *p, int r)
5582 {
5583 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5584 p = p + 4;
5585 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5586 return p + 4;
5587 }
5588
5589 static bfd_byte *
5590 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5591 {
5592 p = savevr (abfd, p, r);
5593 bfd_put_32 (abfd, BLR, p);
5594 return p + 4;
5595 }
5596
5597 static bfd_byte *
5598 restvr (bfd *abfd, bfd_byte *p, int r)
5599 {
5600 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5601 p = p + 4;
5602 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5603 return p + 4;
5604 }
5605
5606 static bfd_byte *
5607 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5608 {
5609 p = restvr (abfd, p, r);
5610 bfd_put_32 (abfd, BLR, p);
5611 return p + 4;
5612 }
5613
5614 /* Called via elf_link_hash_traverse to transfer dynamic linking
5615 information on function code symbol entries to their corresponding
5616 function descriptor symbol entries. */
5617
5618 static bfd_boolean
5619 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5620 {
5621 struct bfd_link_info *info;
5622 struct ppc_link_hash_table *htab;
5623 struct plt_entry *ent;
5624 struct ppc_link_hash_entry *fh;
5625 struct ppc_link_hash_entry *fdh;
5626 bfd_boolean force_local;
5627
5628 fh = (struct ppc_link_hash_entry *) h;
5629 if (fh->elf.root.type == bfd_link_hash_indirect)
5630 return TRUE;
5631
5632 if (fh->elf.root.type == bfd_link_hash_warning)
5633 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5634
5635 info = inf;
5636 htab = ppc_hash_table (info);
5637
5638 /* Resolve undefined references to dot-symbols as the value
5639 in the function descriptor, if we have one in a regular object.
5640 This is to satisfy cases like ".quad .foo". Calls to functions
5641 in dynamic objects are handled elsewhere. */
5642 if (fh->elf.root.type == bfd_link_hash_undefweak
5643 && fh->was_undefined
5644 && (fh->oh->elf.root.type == bfd_link_hash_defined
5645 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5646 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5647 && opd_entry_value (fh->oh->elf.root.u.def.section,
5648 fh->oh->elf.root.u.def.value,
5649 &fh->elf.root.u.def.section,
5650 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5651 {
5652 fh->elf.root.type = fh->oh->elf.root.type;
5653 fh->elf.forced_local = 1;
5654 }
5655
5656 /* If this is a function code symbol, transfer dynamic linking
5657 information to the function descriptor symbol. */
5658 if (!fh->is_func)
5659 return TRUE;
5660
5661 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5662 if (ent->plt.refcount > 0)
5663 break;
5664 if (ent == NULL
5665 || fh->elf.root.root.string[0] != '.'
5666 || fh->elf.root.root.string[1] == '\0')
5667 return TRUE;
5668
5669 /* Find the corresponding function descriptor symbol. Create it
5670 as undefined if necessary. */
5671
5672 fdh = get_fdh (fh, htab);
5673 if (fdh != NULL)
5674 while (fdh->elf.root.type == bfd_link_hash_indirect
5675 || fdh->elf.root.type == bfd_link_hash_warning)
5676 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5677
5678 if (fdh == NULL
5679 && info->shared
5680 && (fh->elf.root.type == bfd_link_hash_undefined
5681 || fh->elf.root.type == bfd_link_hash_undefweak))
5682 {
5683 fdh = make_fdh (info, fh);
5684 if (fdh == NULL)
5685 return FALSE;
5686 }
5687
5688 /* Fake function descriptors are made undefweak. If the function
5689 code symbol is strong undefined, make the fake sym the same.
5690 If the function code symbol is defined, then force the fake
5691 descriptor local; We can't support overriding of symbols in a
5692 shared library on a fake descriptor. */
5693
5694 if (fdh != NULL
5695 && fdh->fake
5696 && fdh->elf.root.type == bfd_link_hash_undefweak)
5697 {
5698 if (fh->elf.root.type == bfd_link_hash_undefined)
5699 {
5700 fdh->elf.root.type = bfd_link_hash_undefined;
5701 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5702 }
5703 else if (fh->elf.root.type == bfd_link_hash_defined
5704 || fh->elf.root.type == bfd_link_hash_defweak)
5705 {
5706 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5707 }
5708 }
5709
5710 if (fdh != NULL
5711 && !fdh->elf.forced_local
5712 && (info->shared
5713 || fdh->elf.def_dynamic
5714 || fdh->elf.ref_dynamic
5715 || (fdh->elf.root.type == bfd_link_hash_undefweak
5716 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5717 {
5718 if (fdh->elf.dynindx == -1)
5719 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5720 return FALSE;
5721 fdh->elf.ref_regular |= fh->elf.ref_regular;
5722 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5723 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5724 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5725 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5726 {
5727 move_plt_plist (fh, fdh);
5728 fdh->elf.needs_plt = 1;
5729 }
5730 fdh->is_func_descriptor = 1;
5731 fdh->oh = fh;
5732 fh->oh = fdh;
5733 }
5734
5735 /* Now that the info is on the function descriptor, clear the
5736 function code sym info. Any function code syms for which we
5737 don't have a definition in a regular file, we force local.
5738 This prevents a shared library from exporting syms that have
5739 been imported from another library. Function code syms that
5740 are really in the library we must leave global to prevent the
5741 linker dragging in a definition from a static library. */
5742 force_local = (!fh->elf.def_regular
5743 || fdh == NULL
5744 || !fdh->elf.def_regular
5745 || fdh->elf.forced_local);
5746 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5747
5748 return TRUE;
5749 }
5750
5751 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5752 this hook to a) provide some gcc support functions, and b) transfer
5753 dynamic linking information gathered so far on function code symbol
5754 entries, to their corresponding function descriptor symbol entries. */
5755
5756 static bfd_boolean
5757 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5758 struct bfd_link_info *info)
5759 {
5760 struct ppc_link_hash_table *htab;
5761 unsigned int i;
5762 const struct sfpr_def_parms funcs[] =
5763 {
5764 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5765 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5766 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5767 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5768 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5769 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5770 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5771 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5772 { "._savef", 14, 31, savefpr, savefpr1_tail },
5773 { "._restf", 14, 31, restfpr, restfpr1_tail },
5774 { "_savevr_", 20, 31, savevr, savevr_tail },
5775 { "_restvr_", 20, 31, restvr, restvr_tail }
5776 };
5777
5778 htab = ppc_hash_table (info);
5779 if (htab->sfpr == NULL)
5780 /* We don't have any relocs. */
5781 return TRUE;
5782
5783 /* Provide any missing _save* and _rest* functions. */
5784 htab->sfpr->size = 0;
5785 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5786 if (!sfpr_define (info, &funcs[i]))
5787 return FALSE;
5788
5789 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5790
5791 if (htab->sfpr->size == 0)
5792 htab->sfpr->flags |= SEC_EXCLUDE;
5793
5794 return TRUE;
5795 }
5796
5797 /* Adjust a symbol defined by a dynamic object and referenced by a
5798 regular object. The current definition is in some section of the
5799 dynamic object, but we're not including those sections. We have to
5800 change the definition to something the rest of the link can
5801 understand. */
5802
5803 static bfd_boolean
5804 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5805 struct elf_link_hash_entry *h)
5806 {
5807 struct ppc_link_hash_table *htab;
5808 asection *s;
5809
5810 htab = ppc_hash_table (info);
5811
5812 /* Deal with function syms. */
5813 if (h->type == STT_FUNC
5814 || h->needs_plt)
5815 {
5816 /* Clear procedure linkage table information for any symbol that
5817 won't need a .plt entry. */
5818 struct plt_entry *ent;
5819 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5820 if (ent->plt.refcount > 0)
5821 break;
5822 if (ent == NULL
5823 || SYMBOL_CALLS_LOCAL (info, h)
5824 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5825 && h->root.type == bfd_link_hash_undefweak))
5826 {
5827 h->plt.plist = NULL;
5828 h->needs_plt = 0;
5829 }
5830 }
5831 else
5832 h->plt.plist = NULL;
5833
5834 /* If this is a weak symbol, and there is a real definition, the
5835 processor independent code will have arranged for us to see the
5836 real definition first, and we can just use the same value. */
5837 if (h->u.weakdef != NULL)
5838 {
5839 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5840 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5841 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5842 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5843 if (ELIMINATE_COPY_RELOCS)
5844 h->non_got_ref = h->u.weakdef->non_got_ref;
5845 return TRUE;
5846 }
5847
5848 /* If we are creating a shared library, we must presume that the
5849 only references to the symbol are via the global offset table.
5850 For such cases we need not do anything here; the relocations will
5851 be handled correctly by relocate_section. */
5852 if (info->shared)
5853 return TRUE;
5854
5855 /* If there are no references to this symbol that do not use the
5856 GOT, we don't need to generate a copy reloc. */
5857 if (!h->non_got_ref)
5858 return TRUE;
5859
5860 /* Don't generate a copy reloc for symbols defined in the executable. */
5861 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
5862 return TRUE;
5863
5864 if (ELIMINATE_COPY_RELOCS)
5865 {
5866 struct ppc_link_hash_entry * eh;
5867 struct ppc_dyn_relocs *p;
5868
5869 eh = (struct ppc_link_hash_entry *) h;
5870 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5871 {
5872 s = p->sec->output_section;
5873 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5874 break;
5875 }
5876
5877 /* If we didn't find any dynamic relocs in read-only sections, then
5878 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5879 if (p == NULL)
5880 {
5881 h->non_got_ref = 0;
5882 return TRUE;
5883 }
5884 }
5885
5886 if (h->plt.plist != NULL)
5887 {
5888 /* We should never get here, but unfortunately there are versions
5889 of gcc out there that improperly (for this ABI) put initialized
5890 function pointers, vtable refs and suchlike in read-only
5891 sections. Allow them to proceed, but warn that this might
5892 break at runtime. */
5893 (*_bfd_error_handler)
5894 (_("copy reloc against `%s' requires lazy plt linking; "
5895 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5896 h->root.root.string);
5897 }
5898
5899 /* This is a reference to a symbol defined by a dynamic object which
5900 is not a function. */
5901
5902 if (h->size == 0)
5903 {
5904 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5905 h->root.root.string);
5906 return TRUE;
5907 }
5908
5909 /* We must allocate the symbol in our .dynbss section, which will
5910 become part of the .bss section of the executable. There will be
5911 an entry for this symbol in the .dynsym section. The dynamic
5912 object will contain position independent code, so all references
5913 from the dynamic object to this symbol will go through the global
5914 offset table. The dynamic linker will use the .dynsym entry to
5915 determine the address it must put in the global offset table, so
5916 both the dynamic object and the regular object will refer to the
5917 same memory location for the variable. */
5918
5919 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5920 to copy the initial value out of the dynamic object and into the
5921 runtime process image. We need to remember the offset into the
5922 .rela.bss section we are going to use. */
5923 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5924 {
5925 htab->relbss->size += sizeof (Elf64_External_Rela);
5926 h->needs_copy = 1;
5927 }
5928
5929 s = htab->dynbss;
5930
5931 return _bfd_elf_adjust_dynamic_copy (h, s);
5932 }
5933
5934 /* If given a function descriptor symbol, hide both the function code
5935 sym and the descriptor. */
5936 static void
5937 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5938 struct elf_link_hash_entry *h,
5939 bfd_boolean force_local)
5940 {
5941 struct ppc_link_hash_entry *eh;
5942 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5943
5944 eh = (struct ppc_link_hash_entry *) h;
5945 if (eh->is_func_descriptor)
5946 {
5947 struct ppc_link_hash_entry *fh = eh->oh;
5948
5949 if (fh == NULL)
5950 {
5951 const char *p, *q;
5952 struct ppc_link_hash_table *htab;
5953 char save;
5954
5955 /* We aren't supposed to use alloca in BFD because on
5956 systems which do not have alloca the version in libiberty
5957 calls xmalloc, which might cause the program to crash
5958 when it runs out of memory. This function doesn't have a
5959 return status, so there's no way to gracefully return an
5960 error. So cheat. We know that string[-1] can be safely
5961 accessed; It's either a string in an ELF string table,
5962 or allocated in an objalloc structure. */
5963
5964 p = eh->elf.root.root.string - 1;
5965 save = *p;
5966 *(char *) p = '.';
5967 htab = ppc_hash_table (info);
5968 fh = (struct ppc_link_hash_entry *)
5969 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5970 *(char *) p = save;
5971
5972 /* Unfortunately, if it so happens that the string we were
5973 looking for was allocated immediately before this string,
5974 then we overwrote the string terminator. That's the only
5975 reason the lookup should fail. */
5976 if (fh == NULL)
5977 {
5978 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5979 while (q >= eh->elf.root.root.string && *q == *p)
5980 --q, --p;
5981 if (q < eh->elf.root.root.string && *p == '.')
5982 fh = (struct ppc_link_hash_entry *)
5983 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5984 }
5985 if (fh != NULL)
5986 {
5987 eh->oh = fh;
5988 fh->oh = eh;
5989 }
5990 }
5991 if (fh != NULL)
5992 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5993 }
5994 }
5995
5996 static bfd_boolean
5997 get_sym_h (struct elf_link_hash_entry **hp,
5998 Elf_Internal_Sym **symp,
5999 asection **symsecp,
6000 char **tls_maskp,
6001 Elf_Internal_Sym **locsymsp,
6002 unsigned long r_symndx,
6003 bfd *ibfd)
6004 {
6005 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6006
6007 if (r_symndx >= symtab_hdr->sh_info)
6008 {
6009 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6010 struct elf_link_hash_entry *h;
6011
6012 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6013 while (h->root.type == bfd_link_hash_indirect
6014 || h->root.type == bfd_link_hash_warning)
6015 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6016
6017 if (hp != NULL)
6018 *hp = h;
6019
6020 if (symp != NULL)
6021 *symp = NULL;
6022
6023 if (symsecp != NULL)
6024 {
6025 asection *symsec = NULL;
6026 if (h->root.type == bfd_link_hash_defined
6027 || h->root.type == bfd_link_hash_defweak)
6028 symsec = h->root.u.def.section;
6029 *symsecp = symsec;
6030 }
6031
6032 if (tls_maskp != NULL)
6033 {
6034 struct ppc_link_hash_entry *eh;
6035
6036 eh = (struct ppc_link_hash_entry *) h;
6037 *tls_maskp = &eh->tls_mask;
6038 }
6039 }
6040 else
6041 {
6042 Elf_Internal_Sym *sym;
6043 Elf_Internal_Sym *locsyms = *locsymsp;
6044
6045 if (locsyms == NULL)
6046 {
6047 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6048 if (locsyms == NULL)
6049 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6050 symtab_hdr->sh_info,
6051 0, NULL, NULL, NULL);
6052 if (locsyms == NULL)
6053 return FALSE;
6054 *locsymsp = locsyms;
6055 }
6056 sym = locsyms + r_symndx;
6057
6058 if (hp != NULL)
6059 *hp = NULL;
6060
6061 if (symp != NULL)
6062 *symp = sym;
6063
6064 if (symsecp != NULL)
6065 {
6066 asection *symsec = NULL;
6067 if ((sym->st_shndx != SHN_UNDEF
6068 && sym->st_shndx < SHN_LORESERVE)
6069 || sym->st_shndx > SHN_HIRESERVE)
6070 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6071 *symsecp = symsec;
6072 }
6073
6074 if (tls_maskp != NULL)
6075 {
6076 struct got_entry **lgot_ents;
6077 char *tls_mask;
6078
6079 tls_mask = NULL;
6080 lgot_ents = elf_local_got_ents (ibfd);
6081 if (lgot_ents != NULL)
6082 {
6083 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6084 tls_mask = &lgot_masks[r_symndx];
6085 }
6086 *tls_maskp = tls_mask;
6087 }
6088 }
6089 return TRUE;
6090 }
6091
6092 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6093 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6094 type suitable for optimization, and 1 otherwise. */
6095
6096 static int
6097 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6098 Elf_Internal_Sym **locsymsp,
6099 const Elf_Internal_Rela *rel, bfd *ibfd)
6100 {
6101 unsigned long r_symndx;
6102 int next_r;
6103 struct elf_link_hash_entry *h;
6104 Elf_Internal_Sym *sym;
6105 asection *sec;
6106 bfd_vma off;
6107
6108 r_symndx = ELF64_R_SYM (rel->r_info);
6109 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6110 return 0;
6111
6112 if ((*tls_maskp != NULL && **tls_maskp != 0)
6113 || sec == NULL
6114 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6115 return 1;
6116
6117 /* Look inside a TOC section too. */
6118 if (h != NULL)
6119 {
6120 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6121 off = h->root.u.def.value;
6122 }
6123 else
6124 off = sym->st_value;
6125 off += rel->r_addend;
6126 BFD_ASSERT (off % 8 == 0);
6127 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6128 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6129 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6130 return 0;
6131 if (toc_symndx != NULL)
6132 *toc_symndx = r_symndx;
6133 if ((h == NULL
6134 || ((h->root.type == bfd_link_hash_defined
6135 || h->root.type == bfd_link_hash_defweak)
6136 && !h->def_dynamic))
6137 && (next_r == -1 || next_r == -2))
6138 return 1 - next_r;
6139 return 1;
6140 }
6141
6142 /* Adjust all global syms defined in opd sections. In gcc generated
6143 code for the old ABI, these will already have been done. */
6144
6145 static bfd_boolean
6146 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6147 {
6148 struct ppc_link_hash_entry *eh;
6149 asection *sym_sec;
6150 long *opd_adjust;
6151
6152 if (h->root.type == bfd_link_hash_indirect)
6153 return TRUE;
6154
6155 if (h->root.type == bfd_link_hash_warning)
6156 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6157
6158 if (h->root.type != bfd_link_hash_defined
6159 && h->root.type != bfd_link_hash_defweak)
6160 return TRUE;
6161
6162 eh = (struct ppc_link_hash_entry *) h;
6163 if (eh->adjust_done)
6164 return TRUE;
6165
6166 sym_sec = eh->elf.root.u.def.section;
6167 opd_adjust = get_opd_info (sym_sec);
6168 if (opd_adjust != NULL)
6169 {
6170 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6171 if (adjust == -1)
6172 {
6173 /* This entry has been deleted. */
6174 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6175 if (dsec == NULL)
6176 {
6177 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6178 if (elf_discarded_section (dsec))
6179 {
6180 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6181 break;
6182 }
6183 }
6184 eh->elf.root.u.def.value = 0;
6185 eh->elf.root.u.def.section = dsec;
6186 }
6187 else
6188 eh->elf.root.u.def.value += adjust;
6189 eh->adjust_done = 1;
6190 }
6191 return TRUE;
6192 }
6193
6194 /* Handles decrementing dynamic reloc counts for the reloc specified by
6195 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6196 have already been determined. */
6197
6198 static bfd_boolean
6199 dec_dynrel_count (bfd_vma r_info,
6200 asection *sec,
6201 struct bfd_link_info *info,
6202 Elf_Internal_Sym **local_syms,
6203 struct elf_link_hash_entry *h,
6204 asection *sym_sec)
6205 {
6206 enum elf_ppc64_reloc_type r_type;
6207 struct ppc_dyn_relocs *p;
6208 struct ppc_dyn_relocs **pp;
6209
6210 /* Can this reloc be dynamic? This switch, and later tests here
6211 should be kept in sync with the code in check_relocs. */
6212 r_type = ELF64_R_TYPE (r_info);
6213 switch (r_type)
6214 {
6215 default:
6216 return TRUE;
6217
6218 case R_PPC64_TPREL16:
6219 case R_PPC64_TPREL16_LO:
6220 case R_PPC64_TPREL16_HI:
6221 case R_PPC64_TPREL16_HA:
6222 case R_PPC64_TPREL16_DS:
6223 case R_PPC64_TPREL16_LO_DS:
6224 case R_PPC64_TPREL16_HIGHER:
6225 case R_PPC64_TPREL16_HIGHERA:
6226 case R_PPC64_TPREL16_HIGHEST:
6227 case R_PPC64_TPREL16_HIGHESTA:
6228 if (!info->shared)
6229 return TRUE;
6230
6231 case R_PPC64_TPREL64:
6232 case R_PPC64_DTPMOD64:
6233 case R_PPC64_DTPREL64:
6234 case R_PPC64_ADDR64:
6235 case R_PPC64_REL30:
6236 case R_PPC64_REL32:
6237 case R_PPC64_REL64:
6238 case R_PPC64_ADDR14:
6239 case R_PPC64_ADDR14_BRNTAKEN:
6240 case R_PPC64_ADDR14_BRTAKEN:
6241 case R_PPC64_ADDR16:
6242 case R_PPC64_ADDR16_DS:
6243 case R_PPC64_ADDR16_HA:
6244 case R_PPC64_ADDR16_HI:
6245 case R_PPC64_ADDR16_HIGHER:
6246 case R_PPC64_ADDR16_HIGHERA:
6247 case R_PPC64_ADDR16_HIGHEST:
6248 case R_PPC64_ADDR16_HIGHESTA:
6249 case R_PPC64_ADDR16_LO:
6250 case R_PPC64_ADDR16_LO_DS:
6251 case R_PPC64_ADDR24:
6252 case R_PPC64_ADDR32:
6253 case R_PPC64_UADDR16:
6254 case R_PPC64_UADDR32:
6255 case R_PPC64_UADDR64:
6256 case R_PPC64_TOC:
6257 break;
6258 }
6259
6260 if (local_syms != NULL)
6261 {
6262 unsigned long r_symndx;
6263 Elf_Internal_Sym *sym;
6264 bfd *ibfd = sec->owner;
6265
6266 r_symndx = ELF64_R_SYM (r_info);
6267 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6268 return FALSE;
6269 }
6270
6271 if ((info->shared
6272 && (MUST_BE_DYN_RELOC (r_type)
6273 || (h != NULL
6274 && (!info->symbolic
6275 || h->root.type == bfd_link_hash_defweak
6276 || !h->def_regular))))
6277 || (ELIMINATE_COPY_RELOCS
6278 && !info->shared
6279 && h != NULL
6280 && (h->root.type == bfd_link_hash_defweak
6281 || !h->def_regular)))
6282 ;
6283 else
6284 return TRUE;
6285
6286 if (h != NULL)
6287 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6288 else
6289 {
6290 if (sym_sec != NULL)
6291 {
6292 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6293 pp = (struct ppc_dyn_relocs **) vpp;
6294 }
6295 else
6296 {
6297 void *vpp = &elf_section_data (sec)->local_dynrel;
6298 pp = (struct ppc_dyn_relocs **) vpp;
6299 }
6300
6301 /* elf_gc_sweep may have already removed all dyn relocs associated
6302 with local syms for a given section. Don't report a dynreloc
6303 miscount. */
6304 if (*pp == NULL)
6305 return TRUE;
6306 }
6307
6308 while ((p = *pp) != NULL)
6309 {
6310 if (p->sec == sec)
6311 {
6312 if (!MUST_BE_DYN_RELOC (r_type))
6313 p->pc_count -= 1;
6314 p->count -= 1;
6315 if (p->count == 0)
6316 *pp = p->next;
6317 return TRUE;
6318 }
6319 pp = &p->next;
6320 }
6321
6322 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6323 sec->owner, sec);
6324 bfd_set_error (bfd_error_bad_value);
6325 return FALSE;
6326 }
6327
6328 /* Remove unused Official Procedure Descriptor entries. Currently we
6329 only remove those associated with functions in discarded link-once
6330 sections, or weakly defined functions that have been overridden. It
6331 would be possible to remove many more entries for statically linked
6332 applications. */
6333
6334 bfd_boolean
6335 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6336 bfd_boolean no_opd_opt,
6337 bfd_boolean non_overlapping)
6338 {
6339 bfd *ibfd;
6340 bfd_boolean some_edited = FALSE;
6341 asection *need_pad = NULL;
6342
6343 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6344 {
6345 asection *sec;
6346 Elf_Internal_Rela *relstart, *rel, *relend;
6347 Elf_Internal_Shdr *symtab_hdr;
6348 Elf_Internal_Sym *local_syms;
6349 struct elf_link_hash_entry **sym_hashes;
6350 bfd_vma offset;
6351 bfd_size_type amt;
6352 long *opd_adjust;
6353 bfd_boolean need_edit, add_aux_fields;
6354 bfd_size_type cnt_16b = 0;
6355
6356 sec = bfd_get_section_by_name (ibfd, ".opd");
6357 if (sec == NULL || sec->size == 0)
6358 continue;
6359
6360 amt = sec->size * sizeof (long) / 8;
6361 opd_adjust = get_opd_info (sec);
6362 if (opd_adjust == NULL)
6363 {
6364 /* check_relocs hasn't been called. Must be a ld -r link
6365 or --just-symbols object. */
6366 opd_adjust = bfd_alloc (obfd, amt);
6367 if (opd_adjust == NULL)
6368 return FALSE;
6369 ppc64_elf_section_data (sec)->u.opd_adjust = opd_adjust;
6370 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
6371 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6372 }
6373 memset (opd_adjust, 0, amt);
6374
6375 if (no_opd_opt)
6376 continue;
6377
6378 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6379 continue;
6380
6381 if (sec->output_section == bfd_abs_section_ptr)
6382 continue;
6383
6384 /* Look through the section relocs. */
6385 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6386 continue;
6387
6388 local_syms = NULL;
6389 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6390 sym_hashes = elf_sym_hashes (ibfd);
6391
6392 /* Read the relocations. */
6393 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6394 info->keep_memory);
6395 if (relstart == NULL)
6396 return FALSE;
6397
6398 /* First run through the relocs to check they are sane, and to
6399 determine whether we need to edit this opd section. */
6400 need_edit = FALSE;
6401 need_pad = sec;
6402 offset = 0;
6403 relend = relstart + sec->reloc_count;
6404 for (rel = relstart; rel < relend; )
6405 {
6406 enum elf_ppc64_reloc_type r_type;
6407 unsigned long r_symndx;
6408 asection *sym_sec;
6409 struct elf_link_hash_entry *h;
6410 Elf_Internal_Sym *sym;
6411
6412 /* .opd contains a regular array of 16 or 24 byte entries. We're
6413 only interested in the reloc pointing to a function entry
6414 point. */
6415 if (rel->r_offset != offset
6416 || rel + 1 >= relend
6417 || (rel + 1)->r_offset != offset + 8)
6418 {
6419 /* If someone messes with .opd alignment then after a
6420 "ld -r" we might have padding in the middle of .opd.
6421 Also, there's nothing to prevent someone putting
6422 something silly in .opd with the assembler. No .opd
6423 optimization for them! */
6424 broken_opd:
6425 (*_bfd_error_handler)
6426 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6427 need_edit = FALSE;
6428 break;
6429 }
6430
6431 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6432 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6433 {
6434 (*_bfd_error_handler)
6435 (_("%B: unexpected reloc type %u in .opd section"),
6436 ibfd, r_type);
6437 need_edit = FALSE;
6438 break;
6439 }
6440
6441 r_symndx = ELF64_R_SYM (rel->r_info);
6442 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6443 r_symndx, ibfd))
6444 goto error_ret;
6445
6446 if (sym_sec == NULL || sym_sec->owner == NULL)
6447 {
6448 const char *sym_name;
6449 if (h != NULL)
6450 sym_name = h->root.root.string;
6451 else
6452 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6453 sym_sec);
6454
6455 (*_bfd_error_handler)
6456 (_("%B: undefined sym `%s' in .opd section"),
6457 ibfd, sym_name);
6458 need_edit = FALSE;
6459 break;
6460 }
6461
6462 /* opd entries are always for functions defined in the
6463 current input bfd. If the symbol isn't defined in the
6464 input bfd, then we won't be using the function in this
6465 bfd; It must be defined in a linkonce section in another
6466 bfd, or is weak. It's also possible that we are
6467 discarding the function due to a linker script /DISCARD/,
6468 which we test for via the output_section. */
6469 if (sym_sec->owner != ibfd
6470 || sym_sec->output_section == bfd_abs_section_ptr)
6471 need_edit = TRUE;
6472
6473 rel += 2;
6474 if (rel == relend
6475 || (rel + 1 == relend && rel->r_offset == offset + 16))
6476 {
6477 if (sec->size == offset + 24)
6478 {
6479 need_pad = NULL;
6480 break;
6481 }
6482 if (rel == relend && sec->size == offset + 16)
6483 {
6484 cnt_16b++;
6485 break;
6486 }
6487 goto broken_opd;
6488 }
6489
6490 if (rel->r_offset == offset + 24)
6491 offset += 24;
6492 else if (rel->r_offset != offset + 16)
6493 goto broken_opd;
6494 else if (rel + 1 < relend
6495 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6496 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6497 {
6498 offset += 16;
6499 cnt_16b++;
6500 }
6501 else if (rel + 2 < relend
6502 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6503 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6504 {
6505 offset += 24;
6506 rel += 1;
6507 }
6508 else
6509 goto broken_opd;
6510 }
6511
6512 add_aux_fields = non_overlapping && cnt_16b > 0;
6513
6514 if (need_edit || add_aux_fields)
6515 {
6516 Elf_Internal_Rela *write_rel;
6517 bfd_byte *rptr, *wptr;
6518 bfd_byte *new_contents = NULL;
6519 bfd_boolean skip;
6520 long opd_ent_size;
6521
6522 /* This seems a waste of time as input .opd sections are all
6523 zeros as generated by gcc, but I suppose there's no reason
6524 this will always be so. We might start putting something in
6525 the third word of .opd entries. */
6526 if ((sec->flags & SEC_IN_MEMORY) == 0)
6527 {
6528 bfd_byte *loc;
6529 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6530 {
6531 if (loc != NULL)
6532 free (loc);
6533 error_ret:
6534 if (local_syms != NULL
6535 && symtab_hdr->contents != (unsigned char *) local_syms)
6536 free (local_syms);
6537 if (elf_section_data (sec)->relocs != relstart)
6538 free (relstart);
6539 return FALSE;
6540 }
6541 sec->contents = loc;
6542 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6543 }
6544
6545 elf_section_data (sec)->relocs = relstart;
6546
6547 new_contents = sec->contents;
6548 if (add_aux_fields)
6549 {
6550 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6551 if (new_contents == NULL)
6552 return FALSE;
6553 need_pad = FALSE;
6554 }
6555 wptr = new_contents;
6556 rptr = sec->contents;
6557
6558 write_rel = relstart;
6559 skip = FALSE;
6560 offset = 0;
6561 opd_ent_size = 0;
6562 for (rel = relstart; rel < relend; rel++)
6563 {
6564 unsigned long r_symndx;
6565 asection *sym_sec;
6566 struct elf_link_hash_entry *h;
6567 Elf_Internal_Sym *sym;
6568
6569 r_symndx = ELF64_R_SYM (rel->r_info);
6570 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6571 r_symndx, ibfd))
6572 goto error_ret;
6573
6574 if (rel->r_offset == offset)
6575 {
6576 struct ppc_link_hash_entry *fdh = NULL;
6577
6578 /* See if the .opd entry is full 24 byte or
6579 16 byte (with fd_aux entry overlapped with next
6580 fd_func). */
6581 opd_ent_size = 24;
6582 if ((rel + 2 == relend && sec->size == offset + 16)
6583 || (rel + 3 < relend
6584 && rel[2].r_offset == offset + 16
6585 && rel[3].r_offset == offset + 24
6586 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6587 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6588 opd_ent_size = 16;
6589
6590 if (h != NULL
6591 && h->root.root.string[0] == '.')
6592 {
6593 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6594 ppc_hash_table (info));
6595 if (fdh != NULL
6596 && fdh->elf.root.type != bfd_link_hash_defined
6597 && fdh->elf.root.type != bfd_link_hash_defweak)
6598 fdh = NULL;
6599 }
6600
6601 skip = (sym_sec->owner != ibfd
6602 || sym_sec->output_section == bfd_abs_section_ptr);
6603 if (skip)
6604 {
6605 if (fdh != NULL && sym_sec->owner == ibfd)
6606 {
6607 /* Arrange for the function descriptor sym
6608 to be dropped. */
6609 fdh->elf.root.u.def.value = 0;
6610 fdh->elf.root.u.def.section = sym_sec;
6611 }
6612 opd_adjust[rel->r_offset / 8] = -1;
6613 }
6614 else
6615 {
6616 /* We'll be keeping this opd entry. */
6617
6618 if (fdh != NULL)
6619 {
6620 /* Redefine the function descriptor symbol to
6621 this location in the opd section. It is
6622 necessary to update the value here rather
6623 than using an array of adjustments as we do
6624 for local symbols, because various places
6625 in the generic ELF code use the value
6626 stored in u.def.value. */
6627 fdh->elf.root.u.def.value = wptr - new_contents;
6628 fdh->adjust_done = 1;
6629 }
6630
6631 /* Local syms are a bit tricky. We could
6632 tweak them as they can be cached, but
6633 we'd need to look through the local syms
6634 for the function descriptor sym which we
6635 don't have at the moment. So keep an
6636 array of adjustments. */
6637 opd_adjust[rel->r_offset / 8]
6638 = (wptr - new_contents) - (rptr - sec->contents);
6639
6640 if (wptr != rptr)
6641 memcpy (wptr, rptr, opd_ent_size);
6642 wptr += opd_ent_size;
6643 if (add_aux_fields && opd_ent_size == 16)
6644 {
6645 memset (wptr, '\0', 8);
6646 wptr += 8;
6647 }
6648 }
6649 rptr += opd_ent_size;
6650 offset += opd_ent_size;
6651 }
6652
6653 if (skip)
6654 {
6655 if (!NO_OPD_RELOCS
6656 && !info->relocatable
6657 && !dec_dynrel_count (rel->r_info, sec, info,
6658 NULL, h, sym_sec))
6659 goto error_ret;
6660 }
6661 else
6662 {
6663 /* We need to adjust any reloc offsets to point to the
6664 new opd entries. While we're at it, we may as well
6665 remove redundant relocs. */
6666 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6667 if (write_rel != rel)
6668 memcpy (write_rel, rel, sizeof (*rel));
6669 ++write_rel;
6670 }
6671 }
6672
6673 sec->size = wptr - new_contents;
6674 sec->reloc_count = write_rel - relstart;
6675 if (add_aux_fields)
6676 {
6677 free (sec->contents);
6678 sec->contents = new_contents;
6679 }
6680
6681 /* Fudge the header size too, as this is used later in
6682 elf_bfd_final_link if we are emitting relocs. */
6683 elf_section_data (sec)->rel_hdr.sh_size
6684 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6685 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6686 some_edited = TRUE;
6687 }
6688 else if (elf_section_data (sec)->relocs != relstart)
6689 free (relstart);
6690
6691 if (local_syms != NULL
6692 && symtab_hdr->contents != (unsigned char *) local_syms)
6693 {
6694 if (!info->keep_memory)
6695 free (local_syms);
6696 else
6697 symtab_hdr->contents = (unsigned char *) local_syms;
6698 }
6699 }
6700
6701 if (some_edited)
6702 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6703
6704 /* If we are doing a final link and the last .opd entry is just 16 byte
6705 long, add a 8 byte padding after it. */
6706 if (need_pad != NULL && !info->relocatable)
6707 {
6708 bfd_byte *p;
6709
6710 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6711 {
6712 BFD_ASSERT (need_pad->size > 0);
6713
6714 p = bfd_malloc (need_pad->size + 8);
6715 if (p == NULL)
6716 return FALSE;
6717
6718 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6719 p, 0, need_pad->size))
6720 return FALSE;
6721
6722 need_pad->contents = p;
6723 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6724 }
6725 else
6726 {
6727 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6728 if (p == NULL)
6729 return FALSE;
6730
6731 need_pad->contents = p;
6732 }
6733
6734 memset (need_pad->contents + need_pad->size, 0, 8);
6735 need_pad->size += 8;
6736 }
6737
6738 return TRUE;
6739 }
6740
6741 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6742
6743 asection *
6744 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6745 {
6746 struct ppc_link_hash_table *htab;
6747
6748 htab = ppc_hash_table (info);
6749 if (htab->tls_get_addr != NULL)
6750 {
6751 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6752
6753 while (h->elf.root.type == bfd_link_hash_indirect
6754 || h->elf.root.type == bfd_link_hash_warning)
6755 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6756
6757 htab->tls_get_addr = h;
6758
6759 if (htab->tls_get_addr_fd == NULL
6760 && h->oh != NULL
6761 && h->oh->is_func_descriptor
6762 && (h->oh->elf.root.type == bfd_link_hash_defined
6763 || h->oh->elf.root.type == bfd_link_hash_defweak))
6764 htab->tls_get_addr_fd = h->oh;
6765 }
6766
6767 if (htab->tls_get_addr_fd != NULL)
6768 {
6769 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6770
6771 while (h->elf.root.type == bfd_link_hash_indirect
6772 || h->elf.root.type == bfd_link_hash_warning)
6773 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6774
6775 htab->tls_get_addr_fd = h;
6776 }
6777
6778 return _bfd_elf_tls_setup (obfd, info);
6779 }
6780
6781 /* Run through all the TLS relocs looking for optimization
6782 opportunities. The linker has been hacked (see ppc64elf.em) to do
6783 a preliminary section layout so that we know the TLS segment
6784 offsets. We can't optimize earlier because some optimizations need
6785 to know the tp offset, and we need to optimize before allocating
6786 dynamic relocations. */
6787
6788 bfd_boolean
6789 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6790 {
6791 bfd *ibfd;
6792 asection *sec;
6793 struct ppc_link_hash_table *htab;
6794
6795 if (info->relocatable || info->shared)
6796 return TRUE;
6797
6798 htab = ppc_hash_table (info);
6799 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6800 {
6801 Elf_Internal_Sym *locsyms = NULL;
6802 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6803 unsigned char *toc_ref = NULL;
6804
6805 /* Look at all the sections for this file, with TOC last. */
6806 for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next
6807 : ibfd->sections);
6808 sec != NULL;
6809 sec = (sec == toc ? NULL
6810 : sec->next == NULL ? toc
6811 : sec->next == toc && toc->next ? toc->next
6812 : sec->next))
6813 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6814 {
6815 Elf_Internal_Rela *relstart, *rel, *relend;
6816 int expecting_tls_get_addr;
6817 long toc_ref_index = 0;
6818
6819 /* Read the relocations. */
6820 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6821 info->keep_memory);
6822 if (relstart == NULL)
6823 return FALSE;
6824
6825 expecting_tls_get_addr = 0;
6826 relend = relstart + sec->reloc_count;
6827 for (rel = relstart; rel < relend; rel++)
6828 {
6829 enum elf_ppc64_reloc_type r_type;
6830 unsigned long r_symndx;
6831 struct elf_link_hash_entry *h;
6832 Elf_Internal_Sym *sym;
6833 asection *sym_sec;
6834 char *tls_mask;
6835 char tls_set, tls_clear, tls_type = 0;
6836 bfd_vma value;
6837 bfd_boolean ok_tprel, is_local;
6838
6839 r_symndx = ELF64_R_SYM (rel->r_info);
6840 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6841 r_symndx, ibfd))
6842 {
6843 err_free_rel:
6844 if (elf_section_data (sec)->relocs != relstart)
6845 free (relstart);
6846 if (toc_ref != NULL)
6847 free (toc_ref);
6848 if (locsyms != NULL
6849 && (elf_tdata (ibfd)->symtab_hdr.contents
6850 != (unsigned char *) locsyms))
6851 free (locsyms);
6852 return FALSE;
6853 }
6854
6855 if (h != NULL)
6856 {
6857 if (h->root.type != bfd_link_hash_defined
6858 && h->root.type != bfd_link_hash_defweak)
6859 continue;
6860 value = h->root.u.def.value;
6861 }
6862 else
6863 /* Symbols referenced by TLS relocs must be of type
6864 STT_TLS. So no need for .opd local sym adjust. */
6865 value = sym->st_value;
6866
6867 ok_tprel = FALSE;
6868 is_local = FALSE;
6869 if (h == NULL
6870 || !h->def_dynamic)
6871 {
6872 is_local = TRUE;
6873 value += sym_sec->output_offset;
6874 value += sym_sec->output_section->vma;
6875 value -= htab->elf.tls_sec->vma;
6876 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6877 < (bfd_vma) 1 << 32);
6878 }
6879
6880 r_type = ELF64_R_TYPE (rel->r_info);
6881 switch (r_type)
6882 {
6883 case R_PPC64_GOT_TLSLD16:
6884 case R_PPC64_GOT_TLSLD16_LO:
6885 case R_PPC64_GOT_TLSLD16_HI:
6886 case R_PPC64_GOT_TLSLD16_HA:
6887 /* These relocs should never be against a symbol
6888 defined in a shared lib. Leave them alone if
6889 that turns out to be the case. */
6890 ppc64_tlsld_got (ibfd)->refcount -= 1;
6891 if (!is_local)
6892 continue;
6893
6894 /* LD -> LE */
6895 tls_set = 0;
6896 tls_clear = TLS_LD;
6897 tls_type = TLS_TLS | TLS_LD;
6898 expecting_tls_get_addr = 1;
6899 break;
6900
6901 case R_PPC64_GOT_TLSGD16:
6902 case R_PPC64_GOT_TLSGD16_LO:
6903 case R_PPC64_GOT_TLSGD16_HI:
6904 case R_PPC64_GOT_TLSGD16_HA:
6905 if (ok_tprel)
6906 /* GD -> LE */
6907 tls_set = 0;
6908 else
6909 /* GD -> IE */
6910 tls_set = TLS_TLS | TLS_TPRELGD;
6911 tls_clear = TLS_GD;
6912 tls_type = TLS_TLS | TLS_GD;
6913 expecting_tls_get_addr = 1;
6914 break;
6915
6916 case R_PPC64_GOT_TPREL16_DS:
6917 case R_PPC64_GOT_TPREL16_LO_DS:
6918 case R_PPC64_GOT_TPREL16_HI:
6919 case R_PPC64_GOT_TPREL16_HA:
6920 expecting_tls_get_addr = 0;
6921 if (ok_tprel)
6922 {
6923 /* IE -> LE */
6924 tls_set = 0;
6925 tls_clear = TLS_TPREL;
6926 tls_type = TLS_TLS | TLS_TPREL;
6927 break;
6928 }
6929 else
6930 continue;
6931
6932 case R_PPC64_REL14:
6933 case R_PPC64_REL14_BRTAKEN:
6934 case R_PPC64_REL14_BRNTAKEN:
6935 case R_PPC64_REL24:
6936 if (h != NULL
6937 && (h == &htab->tls_get_addr->elf
6938 || h == &htab->tls_get_addr_fd->elf))
6939 {
6940 if (!expecting_tls_get_addr
6941 && rel != relstart
6942 && ((ELF64_R_TYPE (rel[-1].r_info)
6943 == R_PPC64_TOC16)
6944 || (ELF64_R_TYPE (rel[-1].r_info)
6945 == R_PPC64_TOC16_LO)))
6946 {
6947 /* Check for toc tls entries. */
6948 char *toc_tls;
6949 int retval;
6950
6951 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6952 rel - 1, ibfd);
6953 if (retval == 0)
6954 goto err_free_rel;
6955 if (retval > 1 && toc_tls != NULL)
6956 {
6957 expecting_tls_get_addr = 1;
6958 if (toc_ref != NULL)
6959 toc_ref[toc_ref_index] = 1;
6960 }
6961 }
6962
6963 if (expecting_tls_get_addr)
6964 {
6965 struct plt_entry *ent;
6966 for (ent = h->plt.plist; ent; ent = ent->next)
6967 if (ent->addend == 0)
6968 {
6969 if (ent->plt.refcount > 0)
6970 ent->plt.refcount -= 1;
6971 break;
6972 }
6973 }
6974 }
6975 expecting_tls_get_addr = 0;
6976 continue;
6977
6978 case R_PPC64_TOC16:
6979 case R_PPC64_TOC16_LO:
6980 case R_PPC64_TLS:
6981 expecting_tls_get_addr = 0;
6982 if (sym_sec == toc && toc != NULL)
6983 {
6984 /* Mark this toc entry as referenced by a TLS
6985 code sequence. We can do that now in the
6986 case of R_PPC64_TLS, and after checking for
6987 tls_get_addr for the TOC16 relocs. */
6988 if (toc_ref == NULL)
6989 {
6990 toc_ref = bfd_zmalloc (toc->size / 8);
6991 if (toc_ref == NULL)
6992 goto err_free_rel;
6993 }
6994 if (h != NULL)
6995 value = h->root.u.def.value;
6996 else
6997 value = sym->st_value;
6998 value += rel->r_addend;
6999 BFD_ASSERT (value < toc->size && value % 8 == 0);
7000 toc_ref_index = value / 8;
7001 if (r_type == R_PPC64_TLS)
7002 toc_ref[toc_ref_index] = 1;
7003 }
7004 continue;
7005
7006 case R_PPC64_TPREL64:
7007 expecting_tls_get_addr = 0;
7008 if (sec != toc
7009 || toc_ref == NULL
7010 || !toc_ref[rel->r_offset / 8])
7011 continue;
7012 if (ok_tprel)
7013 {
7014 /* IE -> LE */
7015 tls_set = TLS_EXPLICIT;
7016 tls_clear = TLS_TPREL;
7017 break;
7018 }
7019 else
7020 continue;
7021
7022 case R_PPC64_DTPMOD64:
7023 expecting_tls_get_addr = 0;
7024 if (sec != toc
7025 || toc_ref == NULL
7026 || !toc_ref[rel->r_offset / 8])
7027 continue;
7028 if (rel + 1 < relend
7029 && (rel[1].r_info
7030 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7031 && rel[1].r_offset == rel->r_offset + 8)
7032 {
7033 if (ok_tprel)
7034 /* GD -> LE */
7035 tls_set = TLS_EXPLICIT | TLS_GD;
7036 else
7037 /* GD -> IE */
7038 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7039 tls_clear = TLS_GD;
7040 }
7041 else
7042 {
7043 if (!is_local)
7044 continue;
7045
7046 /* LD -> LE */
7047 tls_set = TLS_EXPLICIT;
7048 tls_clear = TLS_LD;
7049 }
7050 break;
7051
7052 default:
7053 expecting_tls_get_addr = 0;
7054 continue;
7055 }
7056
7057 if ((tls_set & TLS_EXPLICIT) == 0)
7058 {
7059 struct got_entry *ent;
7060
7061 /* Adjust got entry for this reloc. */
7062 if (h != NULL)
7063 ent = h->got.glist;
7064 else
7065 ent = elf_local_got_ents (ibfd)[r_symndx];
7066
7067 for (; ent != NULL; ent = ent->next)
7068 if (ent->addend == rel->r_addend
7069 && ent->owner == ibfd
7070 && ent->tls_type == tls_type)
7071 break;
7072 if (ent == NULL)
7073 abort ();
7074
7075 if (tls_set == 0)
7076 {
7077 /* We managed to get rid of a got entry. */
7078 if (ent->got.refcount > 0)
7079 ent->got.refcount -= 1;
7080 }
7081 }
7082 else
7083 {
7084 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7085 we'll lose one or two dyn relocs. */
7086 if (!dec_dynrel_count (rel->r_info, sec, info,
7087 NULL, h, sym_sec))
7088 return FALSE;
7089
7090 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7091 {
7092 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7093 NULL, h, sym_sec))
7094 return FALSE;
7095 }
7096 }
7097
7098 *tls_mask |= tls_set;
7099 *tls_mask &= ~tls_clear;
7100 }
7101
7102 if (elf_section_data (sec)->relocs != relstart)
7103 free (relstart);
7104 }
7105
7106 if (toc_ref != NULL)
7107 free (toc_ref);
7108
7109 if (locsyms != NULL
7110 && (elf_tdata (ibfd)->symtab_hdr.contents
7111 != (unsigned char *) locsyms))
7112 {
7113 if (!info->keep_memory)
7114 free (locsyms);
7115 else
7116 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7117 }
7118 }
7119 return TRUE;
7120 }
7121
7122 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7123 the values of any global symbols in a toc section that has been
7124 edited. Globals in toc sections should be a rarity, so this function
7125 sets a flag if any are found in toc sections other than the one just
7126 edited, so that futher hash table traversals can be avoided. */
7127
7128 struct adjust_toc_info
7129 {
7130 asection *toc;
7131 unsigned long *skip;
7132 bfd_boolean global_toc_syms;
7133 };
7134
7135 static bfd_boolean
7136 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7137 {
7138 struct ppc_link_hash_entry *eh;
7139 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7140
7141 if (h->root.type == bfd_link_hash_indirect)
7142 return TRUE;
7143
7144 if (h->root.type == bfd_link_hash_warning)
7145 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7146
7147 if (h->root.type != bfd_link_hash_defined
7148 && h->root.type != bfd_link_hash_defweak)
7149 return TRUE;
7150
7151 eh = (struct ppc_link_hash_entry *) h;
7152 if (eh->adjust_done)
7153 return TRUE;
7154
7155 if (eh->elf.root.u.def.section == toc_inf->toc)
7156 {
7157 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7158 if (skip != (unsigned long) -1)
7159 eh->elf.root.u.def.value -= skip;
7160 else
7161 {
7162 (*_bfd_error_handler)
7163 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7164 eh->elf.root.u.def.section = &bfd_abs_section;
7165 eh->elf.root.u.def.value = 0;
7166 }
7167 eh->adjust_done = 1;
7168 }
7169 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7170 toc_inf->global_toc_syms = TRUE;
7171
7172 return TRUE;
7173 }
7174
7175 /* Examine all relocs referencing .toc sections in order to remove
7176 unused .toc entries. */
7177
7178 bfd_boolean
7179 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7180 {
7181 bfd *ibfd;
7182 struct adjust_toc_info toc_inf;
7183
7184 toc_inf.global_toc_syms = TRUE;
7185 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7186 {
7187 asection *toc, *sec;
7188 Elf_Internal_Shdr *symtab_hdr;
7189 Elf_Internal_Sym *local_syms;
7190 struct elf_link_hash_entry **sym_hashes;
7191 Elf_Internal_Rela *relstart, *rel;
7192 unsigned long *skip, *drop;
7193 unsigned char *used;
7194 unsigned char *keep, last, some_unused;
7195
7196 toc = bfd_get_section_by_name (ibfd, ".toc");
7197 if (toc == NULL
7198 || toc->size == 0
7199 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7200 || elf_discarded_section (toc))
7201 continue;
7202
7203 local_syms = NULL;
7204 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7205 sym_hashes = elf_sym_hashes (ibfd);
7206
7207 /* Look at sections dropped from the final link. */
7208 skip = NULL;
7209 relstart = NULL;
7210 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7211 {
7212 if (sec->reloc_count == 0
7213 || !elf_discarded_section (sec)
7214 || get_opd_info (sec)
7215 || (sec->flags & SEC_ALLOC) == 0
7216 || (sec->flags & SEC_DEBUGGING) != 0)
7217 continue;
7218
7219 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7220 if (relstart == NULL)
7221 goto error_ret;
7222
7223 /* Run through the relocs to see which toc entries might be
7224 unused. */
7225 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7226 {
7227 enum elf_ppc64_reloc_type r_type;
7228 unsigned long r_symndx;
7229 asection *sym_sec;
7230 struct elf_link_hash_entry *h;
7231 Elf_Internal_Sym *sym;
7232 bfd_vma val;
7233
7234 r_type = ELF64_R_TYPE (rel->r_info);
7235 switch (r_type)
7236 {
7237 default:
7238 continue;
7239
7240 case R_PPC64_TOC16:
7241 case R_PPC64_TOC16_LO:
7242 case R_PPC64_TOC16_HI:
7243 case R_PPC64_TOC16_HA:
7244 case R_PPC64_TOC16_DS:
7245 case R_PPC64_TOC16_LO_DS:
7246 break;
7247 }
7248
7249 r_symndx = ELF64_R_SYM (rel->r_info);
7250 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7251 r_symndx, ibfd))
7252 goto error_ret;
7253
7254 if (sym_sec != toc)
7255 continue;
7256
7257 if (h != NULL)
7258 val = h->root.u.def.value;
7259 else
7260 val = sym->st_value;
7261 val += rel->r_addend;
7262
7263 if (val >= toc->size)
7264 continue;
7265
7266 /* Anything in the toc ought to be aligned to 8 bytes.
7267 If not, don't mark as unused. */
7268 if (val & 7)
7269 continue;
7270
7271 if (skip == NULL)
7272 {
7273 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7274 if (skip == NULL)
7275 goto error_ret;
7276 }
7277
7278 skip[val >> 3] = 1;
7279 }
7280
7281 if (elf_section_data (sec)->relocs != relstart)
7282 free (relstart);
7283 }
7284
7285 if (skip == NULL)
7286 continue;
7287
7288 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7289 if (used == NULL)
7290 {
7291 error_ret:
7292 if (local_syms != NULL
7293 && symtab_hdr->contents != (unsigned char *) local_syms)
7294 free (local_syms);
7295 if (sec != NULL
7296 && relstart != NULL
7297 && elf_section_data (sec)->relocs != relstart)
7298 free (relstart);
7299 if (skip != NULL)
7300 free (skip);
7301 return FALSE;
7302 }
7303
7304 /* Now check all kept sections that might reference the toc.
7305 Check the toc itself last. */
7306 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7307 : ibfd->sections);
7308 sec != NULL;
7309 sec = (sec == toc ? NULL
7310 : sec->next == NULL ? toc
7311 : sec->next == toc && toc->next ? toc->next
7312 : sec->next))
7313 {
7314 int repeat;
7315
7316 if (sec->reloc_count == 0
7317 || elf_discarded_section (sec)
7318 || get_opd_info (sec)
7319 || (sec->flags & SEC_ALLOC) == 0
7320 || (sec->flags & SEC_DEBUGGING) != 0)
7321 continue;
7322
7323 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7324 if (relstart == NULL)
7325 goto error_ret;
7326
7327 /* Mark toc entries referenced as used. */
7328 repeat = 0;
7329 do
7330 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7331 {
7332 enum elf_ppc64_reloc_type r_type;
7333 unsigned long r_symndx;
7334 asection *sym_sec;
7335 struct elf_link_hash_entry *h;
7336 Elf_Internal_Sym *sym;
7337 bfd_vma val;
7338
7339 r_type = ELF64_R_TYPE (rel->r_info);
7340 switch (r_type)
7341 {
7342 case R_PPC64_TOC16:
7343 case R_PPC64_TOC16_LO:
7344 case R_PPC64_TOC16_HI:
7345 case R_PPC64_TOC16_HA:
7346 case R_PPC64_TOC16_DS:
7347 case R_PPC64_TOC16_LO_DS:
7348 /* In case we're taking addresses of toc entries. */
7349 case R_PPC64_ADDR64:
7350 break;
7351
7352 default:
7353 continue;
7354 }
7355
7356 r_symndx = ELF64_R_SYM (rel->r_info);
7357 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7358 r_symndx, ibfd))
7359 {
7360 free (used);
7361 goto error_ret;
7362 }
7363
7364 if (sym_sec != toc)
7365 continue;
7366
7367 if (h != NULL)
7368 val = h->root.u.def.value;
7369 else
7370 val = sym->st_value;
7371 val += rel->r_addend;
7372
7373 if (val >= toc->size)
7374 continue;
7375
7376 /* For the toc section, we only mark as used if
7377 this entry itself isn't unused. */
7378 if (sec == toc
7379 && !used[val >> 3]
7380 && (used[rel->r_offset >> 3]
7381 || !skip[rel->r_offset >> 3]))
7382 /* Do all the relocs again, to catch reference
7383 chains. */
7384 repeat = 1;
7385
7386 used[val >> 3] = 1;
7387 }
7388 while (repeat);
7389 }
7390
7391 /* Merge the used and skip arrays. Assume that TOC
7392 doublewords not appearing as either used or unused belong
7393 to to an entry more than one doubleword in size. */
7394 for (drop = skip, keep = used, last = 0, some_unused = 0;
7395 drop < skip + (toc->size + 7) / 8;
7396 ++drop, ++keep)
7397 {
7398 if (*keep)
7399 {
7400 *drop = 0;
7401 last = 0;
7402 }
7403 else if (*drop)
7404 {
7405 some_unused = 1;
7406 last = 1;
7407 }
7408 else
7409 *drop = last;
7410 }
7411
7412 free (used);
7413
7414 if (some_unused)
7415 {
7416 bfd_byte *contents, *src;
7417 unsigned long off;
7418
7419 /* Shuffle the toc contents, and at the same time convert the
7420 skip array from booleans into offsets. */
7421 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7422 goto error_ret;
7423
7424 elf_section_data (toc)->this_hdr.contents = contents;
7425
7426 for (src = contents, off = 0, drop = skip;
7427 src < contents + toc->size;
7428 src += 8, ++drop)
7429 {
7430 if (*drop)
7431 {
7432 *drop = (unsigned long) -1;
7433 off += 8;
7434 }
7435 else if (off != 0)
7436 {
7437 *drop = off;
7438 memcpy (src - off, src, 8);
7439 }
7440 }
7441 toc->rawsize = toc->size;
7442 toc->size = src - contents - off;
7443
7444 if (toc->reloc_count != 0)
7445 {
7446 Elf_Internal_Rela *wrel;
7447 bfd_size_type sz;
7448
7449 /* Read toc relocs. */
7450 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7451 TRUE);
7452 if (relstart == NULL)
7453 goto error_ret;
7454
7455 /* Remove unused toc relocs, and adjust those we keep. */
7456 wrel = relstart;
7457 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7458 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7459 {
7460 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7461 wrel->r_info = rel->r_info;
7462 wrel->r_addend = rel->r_addend;
7463 ++wrel;
7464 }
7465 else if (!dec_dynrel_count (rel->r_info, toc, info,
7466 &local_syms, NULL, NULL))
7467 goto error_ret;
7468
7469 toc->reloc_count = wrel - relstart;
7470 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7471 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7472 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7473 }
7474
7475 /* Adjust addends for relocs against the toc section sym. */
7476 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7477 {
7478 if (sec->reloc_count == 0
7479 || elf_discarded_section (sec))
7480 continue;
7481
7482 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7483 TRUE);
7484 if (relstart == NULL)
7485 goto error_ret;
7486
7487 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7488 {
7489 enum elf_ppc64_reloc_type r_type;
7490 unsigned long r_symndx;
7491 asection *sym_sec;
7492 struct elf_link_hash_entry *h;
7493 Elf_Internal_Sym *sym;
7494
7495 r_type = ELF64_R_TYPE (rel->r_info);
7496 switch (r_type)
7497 {
7498 default:
7499 continue;
7500
7501 case R_PPC64_TOC16:
7502 case R_PPC64_TOC16_LO:
7503 case R_PPC64_TOC16_HI:
7504 case R_PPC64_TOC16_HA:
7505 case R_PPC64_TOC16_DS:
7506 case R_PPC64_TOC16_LO_DS:
7507 case R_PPC64_ADDR64:
7508 break;
7509 }
7510
7511 r_symndx = ELF64_R_SYM (rel->r_info);
7512 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7513 r_symndx, ibfd))
7514 goto error_ret;
7515
7516 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7517 continue;
7518
7519 rel->r_addend -= skip[rel->r_addend >> 3];
7520 }
7521 }
7522
7523 /* We shouldn't have local or global symbols defined in the TOC,
7524 but handle them anyway. */
7525 if (local_syms != NULL)
7526 {
7527 Elf_Internal_Sym *sym;
7528
7529 for (sym = local_syms;
7530 sym < local_syms + symtab_hdr->sh_info;
7531 ++sym)
7532 if (sym->st_shndx != SHN_UNDEF
7533 && (sym->st_shndx < SHN_LORESERVE
7534 || sym->st_shndx > SHN_HIRESERVE)
7535 && sym->st_value != 0
7536 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7537 {
7538 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7539 sym->st_value -= skip[sym->st_value >> 3];
7540 else
7541 {
7542 (*_bfd_error_handler)
7543 (_("%s defined in removed toc entry"),
7544 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7545 NULL));
7546 sym->st_value = 0;
7547 sym->st_shndx = SHN_ABS;
7548 }
7549 symtab_hdr->contents = (unsigned char *) local_syms;
7550 }
7551 }
7552
7553 /* Finally, adjust any global syms defined in the toc. */
7554 if (toc_inf.global_toc_syms)
7555 {
7556 toc_inf.toc = toc;
7557 toc_inf.skip = skip;
7558 toc_inf.global_toc_syms = FALSE;
7559 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7560 &toc_inf);
7561 }
7562 }
7563
7564 if (local_syms != NULL
7565 && symtab_hdr->contents != (unsigned char *) local_syms)
7566 {
7567 if (!info->keep_memory)
7568 free (local_syms);
7569 else
7570 symtab_hdr->contents = (unsigned char *) local_syms;
7571 }
7572 free (skip);
7573 }
7574
7575 return TRUE;
7576 }
7577
7578 /* Allocate space in .plt, .got and associated reloc sections for
7579 dynamic relocs. */
7580
7581 static bfd_boolean
7582 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7583 {
7584 struct bfd_link_info *info;
7585 struct ppc_link_hash_table *htab;
7586 asection *s;
7587 struct ppc_link_hash_entry *eh;
7588 struct ppc_dyn_relocs *p;
7589 struct got_entry *gent;
7590
7591 if (h->root.type == bfd_link_hash_indirect)
7592 return TRUE;
7593
7594 if (h->root.type == bfd_link_hash_warning)
7595 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7596
7597 info = (struct bfd_link_info *) inf;
7598 htab = ppc_hash_table (info);
7599
7600 if (htab->elf.dynamic_sections_created
7601 && h->dynindx != -1
7602 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7603 {
7604 struct plt_entry *pent;
7605 bfd_boolean doneone = FALSE;
7606 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7607 if (pent->plt.refcount > 0)
7608 {
7609 /* If this is the first .plt entry, make room for the special
7610 first entry. */
7611 s = htab->plt;
7612 if (s->size == 0)
7613 s->size += PLT_INITIAL_ENTRY_SIZE;
7614
7615 pent->plt.offset = s->size;
7616
7617 /* Make room for this entry. */
7618 s->size += PLT_ENTRY_SIZE;
7619
7620 /* Make room for the .glink code. */
7621 s = htab->glink;
7622 if (s->size == 0)
7623 s->size += GLINK_CALL_STUB_SIZE;
7624 /* We need bigger stubs past index 32767. */
7625 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7626 s->size += 4;
7627 s->size += 2*4;
7628
7629 /* We also need to make an entry in the .rela.plt section. */
7630 s = htab->relplt;
7631 s->size += sizeof (Elf64_External_Rela);
7632 doneone = TRUE;
7633 }
7634 else
7635 pent->plt.offset = (bfd_vma) -1;
7636 if (!doneone)
7637 {
7638 h->plt.plist = NULL;
7639 h->needs_plt = 0;
7640 }
7641 }
7642 else
7643 {
7644 h->plt.plist = NULL;
7645 h->needs_plt = 0;
7646 }
7647
7648 eh = (struct ppc_link_hash_entry *) h;
7649 /* Run through the TLS GD got entries first if we're changing them
7650 to TPREL. */
7651 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7652 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7653 if (gent->got.refcount > 0
7654 && (gent->tls_type & TLS_GD) != 0)
7655 {
7656 /* This was a GD entry that has been converted to TPREL. If
7657 there happens to be a TPREL entry we can use that one. */
7658 struct got_entry *ent;
7659 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7660 if (ent->got.refcount > 0
7661 && (ent->tls_type & TLS_TPREL) != 0
7662 && ent->addend == gent->addend
7663 && ent->owner == gent->owner)
7664 {
7665 gent->got.refcount = 0;
7666 break;
7667 }
7668
7669 /* If not, then we'll be using our own TPREL entry. */
7670 if (gent->got.refcount != 0)
7671 gent->tls_type = TLS_TLS | TLS_TPREL;
7672 }
7673
7674 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7675 if (gent->got.refcount > 0)
7676 {
7677 bfd_boolean dyn;
7678
7679 /* Make sure this symbol is output as a dynamic symbol.
7680 Undefined weak syms won't yet be marked as dynamic,
7681 nor will all TLS symbols. */
7682 if (h->dynindx == -1
7683 && !h->forced_local)
7684 {
7685 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7686 return FALSE;
7687 }
7688
7689 if ((gent->tls_type & TLS_LD) != 0
7690 && !h->def_dynamic)
7691 {
7692 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7693 continue;
7694 }
7695
7696 s = ppc64_elf_tdata (gent->owner)->got;
7697 gent->got.offset = s->size;
7698 s->size
7699 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7700 dyn = htab->elf.dynamic_sections_created;
7701 if ((info->shared
7702 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7703 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7704 || h->root.type != bfd_link_hash_undefweak))
7705 ppc64_elf_tdata (gent->owner)->relgot->size
7706 += (gent->tls_type & eh->tls_mask & TLS_GD
7707 ? 2 * sizeof (Elf64_External_Rela)
7708 : sizeof (Elf64_External_Rela));
7709 }
7710 else
7711 gent->got.offset = (bfd_vma) -1;
7712
7713 if (eh->dyn_relocs == NULL)
7714 return TRUE;
7715
7716 /* In the shared -Bsymbolic case, discard space allocated for
7717 dynamic pc-relative relocs against symbols which turn out to be
7718 defined in regular objects. For the normal shared case, discard
7719 space for relocs that have become local due to symbol visibility
7720 changes. */
7721
7722 if (info->shared)
7723 {
7724 /* Relocs that use pc_count are those that appear on a call insn,
7725 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7726 generated via assembly. We want calls to protected symbols to
7727 resolve directly to the function rather than going via the plt.
7728 If people want function pointer comparisons to work as expected
7729 then they should avoid writing weird assembly. */
7730 if (SYMBOL_CALLS_LOCAL (info, h))
7731 {
7732 struct ppc_dyn_relocs **pp;
7733
7734 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7735 {
7736 p->count -= p->pc_count;
7737 p->pc_count = 0;
7738 if (p->count == 0)
7739 *pp = p->next;
7740 else
7741 pp = &p->next;
7742 }
7743 }
7744
7745 /* Also discard relocs on undefined weak syms with non-default
7746 visibility. */
7747 if (eh->dyn_relocs != NULL
7748 && h->root.type == bfd_link_hash_undefweak)
7749 {
7750 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7751 eh->dyn_relocs = NULL;
7752
7753 /* Make sure this symbol is output as a dynamic symbol.
7754 Undefined weak syms won't yet be marked as dynamic. */
7755 else if (h->dynindx == -1
7756 && !h->forced_local)
7757 {
7758 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7759 return FALSE;
7760 }
7761 }
7762 }
7763 else if (ELIMINATE_COPY_RELOCS)
7764 {
7765 /* For the non-shared case, discard space for relocs against
7766 symbols which turn out to need copy relocs or are not
7767 dynamic. */
7768
7769 if (!h->non_got_ref
7770 && h->def_dynamic
7771 && !h->def_regular)
7772 {
7773 /* Make sure this symbol is output as a dynamic symbol.
7774 Undefined weak syms won't yet be marked as dynamic. */
7775 if (h->dynindx == -1
7776 && !h->forced_local)
7777 {
7778 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7779 return FALSE;
7780 }
7781
7782 /* If that succeeded, we know we'll be keeping all the
7783 relocs. */
7784 if (h->dynindx != -1)
7785 goto keep;
7786 }
7787
7788 eh->dyn_relocs = NULL;
7789
7790 keep: ;
7791 }
7792
7793 /* Finally, allocate space. */
7794 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7795 {
7796 asection *sreloc = elf_section_data (p->sec)->sreloc;
7797 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7798 }
7799
7800 return TRUE;
7801 }
7802
7803 /* Find any dynamic relocs that apply to read-only sections. */
7804
7805 static bfd_boolean
7806 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7807 {
7808 struct ppc_link_hash_entry *eh;
7809 struct ppc_dyn_relocs *p;
7810
7811 if (h->root.type == bfd_link_hash_warning)
7812 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7813
7814 eh = (struct ppc_link_hash_entry *) h;
7815 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7816 {
7817 asection *s = p->sec->output_section;
7818
7819 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7820 {
7821 struct bfd_link_info *info = inf;
7822
7823 info->flags |= DF_TEXTREL;
7824
7825 /* Not an error, just cut short the traversal. */
7826 return FALSE;
7827 }
7828 }
7829 return TRUE;
7830 }
7831
7832 /* Set the sizes of the dynamic sections. */
7833
7834 static bfd_boolean
7835 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7836 struct bfd_link_info *info)
7837 {
7838 struct ppc_link_hash_table *htab;
7839 bfd *dynobj;
7840 asection *s;
7841 bfd_boolean relocs;
7842 bfd *ibfd;
7843
7844 htab = ppc_hash_table (info);
7845 dynobj = htab->elf.dynobj;
7846 if (dynobj == NULL)
7847 abort ();
7848
7849 if (htab->elf.dynamic_sections_created)
7850 {
7851 /* Set the contents of the .interp section to the interpreter. */
7852 if (info->executable)
7853 {
7854 s = bfd_get_section_by_name (dynobj, ".interp");
7855 if (s == NULL)
7856 abort ();
7857 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7858 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7859 }
7860 }
7861
7862 /* Set up .got offsets for local syms, and space for local dynamic
7863 relocs. */
7864 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7865 {
7866 struct got_entry **lgot_ents;
7867 struct got_entry **end_lgot_ents;
7868 char *lgot_masks;
7869 bfd_size_type locsymcount;
7870 Elf_Internal_Shdr *symtab_hdr;
7871 asection *srel;
7872
7873 if (!is_ppc64_elf_target (ibfd->xvec))
7874 continue;
7875
7876 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7877 {
7878 s = ppc64_elf_tdata (ibfd)->got;
7879 ppc64_tlsld_got (ibfd)->offset = s->size;
7880 s->size += 16;
7881 if (info->shared)
7882 {
7883 srel = ppc64_elf_tdata (ibfd)->relgot;
7884 srel->size += sizeof (Elf64_External_Rela);
7885 }
7886 }
7887 else
7888 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7889
7890 for (s = ibfd->sections; s != NULL; s = s->next)
7891 {
7892 struct ppc_dyn_relocs *p;
7893
7894 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7895 {
7896 if (!bfd_is_abs_section (p->sec)
7897 && bfd_is_abs_section (p->sec->output_section))
7898 {
7899 /* Input section has been discarded, either because
7900 it is a copy of a linkonce section or due to
7901 linker script /DISCARD/, so we'll be discarding
7902 the relocs too. */
7903 }
7904 else if (p->count != 0)
7905 {
7906 srel = elf_section_data (p->sec)->sreloc;
7907 srel->size += p->count * sizeof (Elf64_External_Rela);
7908 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7909 info->flags |= DF_TEXTREL;
7910 }
7911 }
7912 }
7913
7914 lgot_ents = elf_local_got_ents (ibfd);
7915 if (!lgot_ents)
7916 continue;
7917
7918 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7919 locsymcount = symtab_hdr->sh_info;
7920 end_lgot_ents = lgot_ents + locsymcount;
7921 lgot_masks = (char *) end_lgot_ents;
7922 s = ppc64_elf_tdata (ibfd)->got;
7923 srel = ppc64_elf_tdata (ibfd)->relgot;
7924 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7925 {
7926 struct got_entry *ent;
7927
7928 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7929 if (ent->got.refcount > 0)
7930 {
7931 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7932 {
7933 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7934 {
7935 ppc64_tlsld_got (ibfd)->offset = s->size;
7936 s->size += 16;
7937 if (info->shared)
7938 srel->size += sizeof (Elf64_External_Rela);
7939 }
7940 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7941 }
7942 else
7943 {
7944 ent->got.offset = s->size;
7945 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7946 {
7947 s->size += 16;
7948 if (info->shared)
7949 srel->size += 2 * sizeof (Elf64_External_Rela);
7950 }
7951 else
7952 {
7953 s->size += 8;
7954 if (info->shared)
7955 srel->size += sizeof (Elf64_External_Rela);
7956 }
7957 }
7958 }
7959 else
7960 ent->got.offset = (bfd_vma) -1;
7961 }
7962 }
7963
7964 /* Allocate global sym .plt and .got entries, and space for global
7965 sym dynamic relocs. */
7966 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7967
7968 /* We now have determined the sizes of the various dynamic sections.
7969 Allocate memory for them. */
7970 relocs = FALSE;
7971 for (s = dynobj->sections; s != NULL; s = s->next)
7972 {
7973 if ((s->flags & SEC_LINKER_CREATED) == 0)
7974 continue;
7975
7976 if (s == htab->brlt || s == htab->relbrlt)
7977 /* These haven't been allocated yet; don't strip. */
7978 continue;
7979 else if (s == htab->got
7980 || s == htab->plt
7981 || s == htab->glink
7982 || s == htab->dynbss)
7983 {
7984 /* Strip this section if we don't need it; see the
7985 comment below. */
7986 }
7987 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7988 {
7989 if (s->size != 0)
7990 {
7991 if (s != htab->relplt)
7992 relocs = TRUE;
7993
7994 /* We use the reloc_count field as a counter if we need
7995 to copy relocs into the output file. */
7996 s->reloc_count = 0;
7997 }
7998 }
7999 else
8000 {
8001 /* It's not one of our sections, so don't allocate space. */
8002 continue;
8003 }
8004
8005 if (s->size == 0)
8006 {
8007 /* If we don't need this section, strip it from the
8008 output file. This is mostly to handle .rela.bss and
8009 .rela.plt. We must create both sections in
8010 create_dynamic_sections, because they must be created
8011 before the linker maps input sections to output
8012 sections. The linker does that before
8013 adjust_dynamic_symbol is called, and it is that
8014 function which decides whether anything needs to go
8015 into these sections. */
8016 s->flags |= SEC_EXCLUDE;
8017 continue;
8018 }
8019
8020 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8021 continue;
8022
8023 /* Allocate memory for the section contents. We use bfd_zalloc
8024 here in case unused entries are not reclaimed before the
8025 section's contents are written out. This should not happen,
8026 but this way if it does we get a R_PPC64_NONE reloc in .rela
8027 sections instead of garbage.
8028 We also rely on the section contents being zero when writing
8029 the GOT. */
8030 s->contents = bfd_zalloc (dynobj, s->size);
8031 if (s->contents == NULL)
8032 return FALSE;
8033 }
8034
8035 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8036 {
8037 if (!is_ppc64_elf_target (ibfd->xvec))
8038 continue;
8039
8040 s = ppc64_elf_tdata (ibfd)->got;
8041 if (s != NULL && s != htab->got)
8042 {
8043 if (s->size == 0)
8044 s->flags |= SEC_EXCLUDE;
8045 else
8046 {
8047 s->contents = bfd_zalloc (ibfd, s->size);
8048 if (s->contents == NULL)
8049 return FALSE;
8050 }
8051 }
8052 s = ppc64_elf_tdata (ibfd)->relgot;
8053 if (s != NULL)
8054 {
8055 if (s->size == 0)
8056 s->flags |= SEC_EXCLUDE;
8057 else
8058 {
8059 s->contents = bfd_zalloc (ibfd, s->size);
8060 if (s->contents == NULL)
8061 return FALSE;
8062 relocs = TRUE;
8063 s->reloc_count = 0;
8064 }
8065 }
8066 }
8067
8068 if (htab->elf.dynamic_sections_created)
8069 {
8070 /* Add some entries to the .dynamic section. We fill in the
8071 values later, in ppc64_elf_finish_dynamic_sections, but we
8072 must add the entries now so that we get the correct size for
8073 the .dynamic section. The DT_DEBUG entry is filled in by the
8074 dynamic linker and used by the debugger. */
8075 #define add_dynamic_entry(TAG, VAL) \
8076 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8077
8078 if (info->executable)
8079 {
8080 if (!add_dynamic_entry (DT_DEBUG, 0))
8081 return FALSE;
8082 }
8083
8084 if (htab->plt != NULL && htab->plt->size != 0)
8085 {
8086 if (!add_dynamic_entry (DT_PLTGOT, 0)
8087 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8088 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8089 || !add_dynamic_entry (DT_JMPREL, 0)
8090 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8091 return FALSE;
8092 }
8093
8094 if (NO_OPD_RELOCS)
8095 {
8096 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8097 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8098 return FALSE;
8099 }
8100
8101 if (relocs)
8102 {
8103 if (!add_dynamic_entry (DT_RELA, 0)
8104 || !add_dynamic_entry (DT_RELASZ, 0)
8105 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8106 return FALSE;
8107
8108 /* If any dynamic relocs apply to a read-only section,
8109 then we need a DT_TEXTREL entry. */
8110 if ((info->flags & DF_TEXTREL) == 0)
8111 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8112
8113 if ((info->flags & DF_TEXTREL) != 0)
8114 {
8115 if (!add_dynamic_entry (DT_TEXTREL, 0))
8116 return FALSE;
8117 }
8118 }
8119 }
8120 #undef add_dynamic_entry
8121
8122 return TRUE;
8123 }
8124
8125 /* Determine the type of stub needed, if any, for a call. */
8126
8127 static inline enum ppc_stub_type
8128 ppc_type_of_stub (asection *input_sec,
8129 const Elf_Internal_Rela *rel,
8130 struct ppc_link_hash_entry **hash,
8131 bfd_vma destination)
8132 {
8133 struct ppc_link_hash_entry *h = *hash;
8134 bfd_vma location;
8135 bfd_vma branch_offset;
8136 bfd_vma max_branch_offset;
8137 enum elf_ppc64_reloc_type r_type;
8138
8139 if (h != NULL)
8140 {
8141 struct ppc_link_hash_entry *fdh = h;
8142 if (fdh->oh != NULL
8143 && fdh->oh->is_func_descriptor)
8144 fdh = fdh->oh;
8145
8146 if (fdh->elf.dynindx != -1)
8147 {
8148 struct plt_entry *ent;
8149
8150 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8151 if (ent->addend == rel->r_addend
8152 && ent->plt.offset != (bfd_vma) -1)
8153 {
8154 *hash = fdh;
8155 return ppc_stub_plt_call;
8156 }
8157 }
8158
8159 /* Here, we know we don't have a plt entry. If we don't have a
8160 either a defined function descriptor or a defined entry symbol
8161 in a regular object file, then it is pointless trying to make
8162 any other type of stub. */
8163 if (!((fdh->elf.root.type == bfd_link_hash_defined
8164 || fdh->elf.root.type == bfd_link_hash_defweak)
8165 && fdh->elf.root.u.def.section->output_section != NULL)
8166 && !((h->elf.root.type == bfd_link_hash_defined
8167 || h->elf.root.type == bfd_link_hash_defweak)
8168 && h->elf.root.u.def.section->output_section != NULL))
8169 return ppc_stub_none;
8170 }
8171
8172 /* Determine where the call point is. */
8173 location = (input_sec->output_offset
8174 + input_sec->output_section->vma
8175 + rel->r_offset);
8176
8177 branch_offset = destination - location;
8178 r_type = ELF64_R_TYPE (rel->r_info);
8179
8180 /* Determine if a long branch stub is needed. */
8181 max_branch_offset = 1 << 25;
8182 if (r_type != R_PPC64_REL24)
8183 max_branch_offset = 1 << 15;
8184
8185 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8186 /* We need a stub. Figure out whether a long_branch or plt_branch
8187 is needed later. */
8188 return ppc_stub_long_branch;
8189
8190 return ppc_stub_none;
8191 }
8192
8193 /* Build a .plt call stub. */
8194
8195 static inline bfd_byte *
8196 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8197 {
8198 #define PPC_LO(v) ((v) & 0xffff)
8199 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8200 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8201
8202 if (PPC_HA (offset) != 0)
8203 {
8204 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8205 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8206 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8207 if (PPC_HA (offset + 16) != PPC_HA (offset))
8208 {
8209 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8210 offset = 0;
8211 }
8212 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8213 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8214 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8215 bfd_put_32 (obfd, BCTR, p), p += 4;
8216 }
8217 else
8218 {
8219 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8220 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8221 if (PPC_HA (offset + 16) != PPC_HA (offset))
8222 {
8223 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8224 offset = 0;
8225 }
8226 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8227 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8228 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8229 bfd_put_32 (obfd, BCTR, p), p += 4;
8230 }
8231 return p;
8232 }
8233
8234 static bfd_boolean
8235 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8236 {
8237 struct ppc_stub_hash_entry *stub_entry;
8238 struct ppc_branch_hash_entry *br_entry;
8239 struct bfd_link_info *info;
8240 struct ppc_link_hash_table *htab;
8241 bfd_byte *loc;
8242 bfd_byte *p;
8243 unsigned int indx;
8244 struct plt_entry *ent;
8245 bfd_vma dest, off;
8246 int size;
8247
8248 /* Massage our args to the form they really have. */
8249 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8250 info = in_arg;
8251
8252 htab = ppc_hash_table (info);
8253
8254 /* Make a note of the offset within the stubs for this entry. */
8255 stub_entry->stub_offset = stub_entry->stub_sec->size;
8256 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8257
8258 htab->stub_count[stub_entry->stub_type - 1] += 1;
8259 switch (stub_entry->stub_type)
8260 {
8261 case ppc_stub_long_branch:
8262 case ppc_stub_long_branch_r2off:
8263 /* Branches are relative. This is where we are going to. */
8264 off = dest = (stub_entry->target_value
8265 + stub_entry->target_section->output_offset
8266 + stub_entry->target_section->output_section->vma);
8267
8268 /* And this is where we are coming from. */
8269 off -= (stub_entry->stub_offset
8270 + stub_entry->stub_sec->output_offset
8271 + stub_entry->stub_sec->output_section->vma);
8272
8273 size = 4;
8274 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8275 {
8276 bfd_vma r2off;
8277
8278 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8279 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8280 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8281 loc += 4;
8282 size = 12;
8283 if (PPC_HA (r2off) != 0)
8284 {
8285 size = 16;
8286 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8287 loc += 4;
8288 }
8289 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8290 loc += 4;
8291 off -= size - 4;
8292 }
8293 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8294
8295 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8296 {
8297 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8298 stub_entry->root.string);
8299 htab->stub_error = TRUE;
8300 return FALSE;
8301 }
8302
8303 if (info->emitrelocations)
8304 {
8305 Elf_Internal_Rela *relocs, *r;
8306 struct bfd_elf_section_data *elfsec_data;
8307
8308 elfsec_data = elf_section_data (stub_entry->stub_sec);
8309 relocs = elfsec_data->relocs;
8310 if (relocs == NULL)
8311 {
8312 bfd_size_type relsize;
8313 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8314 relocs = bfd_alloc (htab->stub_bfd, relsize);
8315 if (relocs == NULL)
8316 return FALSE;
8317 elfsec_data->relocs = relocs;
8318 elfsec_data->rel_hdr.sh_size = relsize;
8319 elfsec_data->rel_hdr.sh_entsize = 24;
8320 stub_entry->stub_sec->reloc_count = 0;
8321 }
8322 r = relocs + stub_entry->stub_sec->reloc_count;
8323 stub_entry->stub_sec->reloc_count += 1;
8324 r->r_offset = loc - stub_entry->stub_sec->contents;
8325 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8326 r->r_addend = dest;
8327 if (stub_entry->h != NULL)
8328 {
8329 struct elf_link_hash_entry **hashes;
8330 unsigned long symndx;
8331 struct ppc_link_hash_entry *h;
8332
8333 hashes = elf_sym_hashes (htab->stub_bfd);
8334 if (hashes == NULL)
8335 {
8336 bfd_size_type hsize;
8337
8338 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8339 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8340 if (hashes == NULL)
8341 return FALSE;
8342 elf_sym_hashes (htab->stub_bfd) = hashes;
8343 htab->stub_globals = 1;
8344 }
8345 symndx = htab->stub_globals++;
8346 h = stub_entry->h;
8347 hashes[symndx] = &h->elf;
8348 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8349 if (h->oh != NULL && h->oh->is_func)
8350 h = h->oh;
8351 if (h->elf.root.u.def.section != stub_entry->target_section)
8352 /* H is an opd symbol. The addend must be zero. */
8353 r->r_addend = 0;
8354 else
8355 {
8356 off = (h->elf.root.u.def.value
8357 + h->elf.root.u.def.section->output_offset
8358 + h->elf.root.u.def.section->output_section->vma);
8359 r->r_addend -= off;
8360 }
8361 }
8362 }
8363 break;
8364
8365 case ppc_stub_plt_branch:
8366 case ppc_stub_plt_branch_r2off:
8367 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8368 stub_entry->root.string + 9,
8369 FALSE, FALSE);
8370 if (br_entry == NULL)
8371 {
8372 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8373 stub_entry->root.string);
8374 htab->stub_error = TRUE;
8375 return FALSE;
8376 }
8377
8378 off = (stub_entry->target_value
8379 + stub_entry->target_section->output_offset
8380 + stub_entry->target_section->output_section->vma);
8381
8382 bfd_put_64 (htab->brlt->owner, off,
8383 htab->brlt->contents + br_entry->offset);
8384
8385 if (htab->relbrlt != NULL)
8386 {
8387 /* Create a reloc for the branch lookup table entry. */
8388 Elf_Internal_Rela rela;
8389 bfd_byte *rl;
8390
8391 rela.r_offset = (br_entry->offset
8392 + htab->brlt->output_offset
8393 + htab->brlt->output_section->vma);
8394 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8395 rela.r_addend = off;
8396
8397 rl = htab->relbrlt->contents;
8398 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8399 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8400 }
8401 else if (info->emitrelocations)
8402 {
8403 Elf_Internal_Rela *relocs, *r;
8404 struct bfd_elf_section_data *elfsec_data;
8405
8406 elfsec_data = elf_section_data (htab->brlt);
8407 relocs = elfsec_data->relocs;
8408 if (relocs == NULL)
8409 {
8410 bfd_size_type relsize;
8411 relsize = htab->brlt->reloc_count * sizeof (*relocs);
8412 relocs = bfd_alloc (htab->brlt->owner, relsize);
8413 if (relocs == NULL)
8414 return FALSE;
8415 elfsec_data->relocs = relocs;
8416 elfsec_data->rel_hdr.sh_size = relsize;
8417 elfsec_data->rel_hdr.sh_entsize = 24;
8418 htab->brlt->reloc_count = 0;
8419 }
8420 r = relocs + htab->brlt->reloc_count;
8421 htab->brlt->reloc_count += 1;
8422 r->r_offset = (br_entry->offset
8423 + htab->brlt->output_offset
8424 + htab->brlt->output_section->vma);
8425 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8426 r->r_addend = off;
8427 }
8428
8429 off = (br_entry->offset
8430 + htab->brlt->output_offset
8431 + htab->brlt->output_section->vma
8432 - elf_gp (htab->brlt->output_section->owner)
8433 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8434
8435 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8436 {
8437 (*_bfd_error_handler)
8438 (_("linkage table error against `%s'"),
8439 stub_entry->root.string);
8440 bfd_set_error (bfd_error_bad_value);
8441 htab->stub_error = TRUE;
8442 return FALSE;
8443 }
8444
8445 indx = off;
8446 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8447 {
8448 if (PPC_HA (indx) != 0)
8449 {
8450 size = 16;
8451 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8452 loc += 4;
8453 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8454 }
8455 else
8456 {
8457 size = 12;
8458 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8459 }
8460 }
8461 else
8462 {
8463 bfd_vma r2off;
8464
8465 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8466 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8467 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8468 loc += 4;
8469 size = 20;
8470 if (PPC_HA (indx) != 0)
8471 {
8472 size += 4;
8473 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8474 loc += 4;
8475 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8476 loc += 4;
8477 }
8478 else
8479 {
8480 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8481 loc += 4;
8482 }
8483
8484 if (PPC_HA (r2off) != 0)
8485 {
8486 size += 4;
8487 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8488 loc += 4;
8489 }
8490 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8491 }
8492 loc += 4;
8493 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8494 loc += 4;
8495 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8496 break;
8497
8498 case ppc_stub_plt_call:
8499 /* Do the best we can for shared libraries built without
8500 exporting ".foo" for each "foo". This can happen when symbol
8501 versioning scripts strip all bar a subset of symbols. */
8502 if (stub_entry->h->oh != NULL
8503 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8504 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8505 {
8506 /* Point the symbol at the stub. There may be multiple stubs,
8507 we don't really care; The main thing is to make this sym
8508 defined somewhere. Maybe defining the symbol in the stub
8509 section is a silly idea. If we didn't do this, htab->top_id
8510 could disappear. */
8511 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8512 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8513 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8514 }
8515
8516 /* Now build the stub. */
8517 off = (bfd_vma) -1;
8518 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8519 if (ent->addend == stub_entry->addend)
8520 {
8521 off = ent->plt.offset;
8522 break;
8523 }
8524 if (off >= (bfd_vma) -2)
8525 abort ();
8526
8527 off &= ~ (bfd_vma) 1;
8528 off += (htab->plt->output_offset
8529 + htab->plt->output_section->vma
8530 - elf_gp (htab->plt->output_section->owner)
8531 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8532
8533 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8534 {
8535 (*_bfd_error_handler)
8536 (_("linkage table error against `%s'"),
8537 stub_entry->h->elf.root.root.string);
8538 bfd_set_error (bfd_error_bad_value);
8539 htab->stub_error = TRUE;
8540 return FALSE;
8541 }
8542
8543 p = build_plt_stub (htab->stub_bfd, loc, off);
8544 size = p - loc;
8545 break;
8546
8547 default:
8548 BFD_FAIL ();
8549 return FALSE;
8550 }
8551
8552 stub_entry->stub_sec->size += size;
8553
8554 if (htab->emit_stub_syms)
8555 {
8556 struct elf_link_hash_entry *h;
8557 size_t len1, len2;
8558 char *name;
8559 const char *const stub_str[] = { "long_branch",
8560 "long_branch_r2off",
8561 "plt_branch",
8562 "plt_branch_r2off",
8563 "plt_call" };
8564
8565 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8566 len2 = strlen (stub_entry->root.string);
8567 name = bfd_malloc (len1 + len2 + 2);
8568 if (name == NULL)
8569 return FALSE;
8570 memcpy (name, stub_entry->root.string, 9);
8571 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8572 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8573 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8574 if (h == NULL)
8575 return FALSE;
8576 if (h->root.type == bfd_link_hash_new)
8577 {
8578 h->root.type = bfd_link_hash_defined;
8579 h->root.u.def.section = stub_entry->stub_sec;
8580 h->root.u.def.value = stub_entry->stub_offset;
8581 h->ref_regular = 1;
8582 h->def_regular = 1;
8583 h->ref_regular_nonweak = 1;
8584 h->forced_local = 1;
8585 h->non_elf = 0;
8586 }
8587 }
8588
8589 return TRUE;
8590 }
8591
8592 /* As above, but don't actually build the stub. Just bump offset so
8593 we know stub section sizes, and select plt_branch stubs where
8594 long_branch stubs won't do. */
8595
8596 static bfd_boolean
8597 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8598 {
8599 struct ppc_stub_hash_entry *stub_entry;
8600 struct bfd_link_info *info;
8601 struct ppc_link_hash_table *htab;
8602 bfd_vma off;
8603 int size;
8604
8605 /* Massage our args to the form they really have. */
8606 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8607 info = in_arg;
8608
8609 htab = ppc_hash_table (info);
8610
8611 if (stub_entry->stub_type == ppc_stub_plt_call)
8612 {
8613 struct plt_entry *ent;
8614 off = (bfd_vma) -1;
8615 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8616 if (ent->addend == stub_entry->addend)
8617 {
8618 off = ent->plt.offset & ~(bfd_vma) 1;
8619 break;
8620 }
8621 if (off >= (bfd_vma) -2)
8622 abort ();
8623 off += (htab->plt->output_offset
8624 + htab->plt->output_section->vma
8625 - elf_gp (htab->plt->output_section->owner)
8626 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8627
8628 size = PLT_CALL_STUB_SIZE;
8629 if (PPC_HA (off) == 0)
8630 size -= 4;
8631 if (PPC_HA (off + 16) != PPC_HA (off))
8632 size += 4;
8633 }
8634 else
8635 {
8636 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8637 variants. */
8638 bfd_vma r2off = 0;
8639
8640 off = (stub_entry->target_value
8641 + stub_entry->target_section->output_offset
8642 + stub_entry->target_section->output_section->vma);
8643 off -= (stub_entry->stub_sec->size
8644 + stub_entry->stub_sec->output_offset
8645 + stub_entry->stub_sec->output_section->vma);
8646
8647 /* Reset the stub type from the plt variant in case we now
8648 can reach with a shorter stub. */
8649 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8650 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8651
8652 size = 4;
8653 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8654 {
8655 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8656 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8657 size = 12;
8658 if (PPC_HA (r2off) != 0)
8659 size = 16;
8660 off -= size - 4;
8661 }
8662
8663 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8664 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8665 {
8666 struct ppc_branch_hash_entry *br_entry;
8667 unsigned int indx;
8668
8669 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8670 stub_entry->root.string + 9,
8671 TRUE, FALSE);
8672 if (br_entry == NULL)
8673 {
8674 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8675 stub_entry->root.string);
8676 htab->stub_error = TRUE;
8677 return FALSE;
8678 }
8679
8680 if (br_entry->iter != htab->stub_iteration)
8681 {
8682 br_entry->iter = htab->stub_iteration;
8683 br_entry->offset = htab->brlt->size;
8684 htab->brlt->size += 8;
8685
8686 if (htab->relbrlt != NULL)
8687 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8688 else if (info->emitrelocations)
8689 {
8690 htab->brlt->reloc_count += 1;
8691 htab->brlt->flags |= SEC_RELOC;
8692 }
8693 }
8694
8695 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8696 off = (br_entry->offset
8697 + htab->brlt->output_offset
8698 + htab->brlt->output_section->vma
8699 - elf_gp (htab->brlt->output_section->owner)
8700 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8701
8702 indx = off;
8703 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8704 {
8705 size = 12;
8706 if (PPC_HA (indx) != 0)
8707 size = 16;
8708 }
8709 else
8710 {
8711 size = 20;
8712 if (PPC_HA (indx) != 0)
8713 size += 4;
8714
8715 if (PPC_HA (r2off) != 0)
8716 size += 4;
8717 }
8718 }
8719 else if (info->emitrelocations)
8720 {
8721 stub_entry->stub_sec->reloc_count += 1;
8722 stub_entry->stub_sec->flags |= SEC_RELOC;
8723 }
8724 }
8725
8726 stub_entry->stub_sec->size += size;
8727 return TRUE;
8728 }
8729
8730 /* Set up various things so that we can make a list of input sections
8731 for each output section included in the link. Returns -1 on error,
8732 0 when no stubs will be needed, and 1 on success. */
8733
8734 int
8735 ppc64_elf_setup_section_lists (bfd *output_bfd,
8736 struct bfd_link_info *info,
8737 int no_multi_toc)
8738 {
8739 bfd *input_bfd;
8740 int top_id, top_index, id;
8741 asection *section;
8742 asection **input_list;
8743 bfd_size_type amt;
8744 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8745
8746 htab->no_multi_toc = no_multi_toc;
8747
8748 if (htab->brlt == NULL)
8749 return 0;
8750
8751 /* Find the top input section id. */
8752 for (input_bfd = info->input_bfds, top_id = 3;
8753 input_bfd != NULL;
8754 input_bfd = input_bfd->link_next)
8755 {
8756 for (section = input_bfd->sections;
8757 section != NULL;
8758 section = section->next)
8759 {
8760 if (top_id < section->id)
8761 top_id = section->id;
8762 }
8763 }
8764
8765 htab->top_id = top_id;
8766 amt = sizeof (struct map_stub) * (top_id + 1);
8767 htab->stub_group = bfd_zmalloc (amt);
8768 if (htab->stub_group == NULL)
8769 return -1;
8770
8771 /* Set toc_off for com, und, abs and ind sections. */
8772 for (id = 0; id < 3; id++)
8773 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8774
8775 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8776
8777 /* We can't use output_bfd->section_count here to find the top output
8778 section index as some sections may have been removed, and
8779 strip_excluded_output_sections doesn't renumber the indices. */
8780 for (section = output_bfd->sections, top_index = 0;
8781 section != NULL;
8782 section = section->next)
8783 {
8784 if (top_index < section->index)
8785 top_index = section->index;
8786 }
8787
8788 htab->top_index = top_index;
8789 amt = sizeof (asection *) * (top_index + 1);
8790 input_list = bfd_zmalloc (amt);
8791 htab->input_list = input_list;
8792 if (input_list == NULL)
8793 return -1;
8794
8795 return 1;
8796 }
8797
8798 /* The linker repeatedly calls this function for each TOC input section
8799 and linker generated GOT section. Group input bfds such that the toc
8800 within a group is less than 64k in size. Will break with cute linker
8801 scripts that play games with dot in the output toc section. */
8802
8803 void
8804 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8805 {
8806 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8807
8808 if (!htab->no_multi_toc)
8809 {
8810 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8811 bfd_vma off = addr - htab->toc_curr;
8812
8813 if (off + isec->size > 0x10000)
8814 htab->toc_curr = addr;
8815
8816 elf_gp (isec->owner) = (htab->toc_curr
8817 - elf_gp (isec->output_section->owner)
8818 + TOC_BASE_OFF);
8819 }
8820 }
8821
8822 /* Called after the last call to the above function. */
8823
8824 void
8825 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8826 {
8827 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8828
8829 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8830
8831 /* toc_curr tracks the TOC offset used for code sections below in
8832 ppc64_elf_next_input_section. Start off at 0x8000. */
8833 htab->toc_curr = TOC_BASE_OFF;
8834 }
8835
8836 /* No toc references were found in ISEC. If the code in ISEC makes no
8837 calls, then there's no need to use toc adjusting stubs when branching
8838 into ISEC. Actually, indirect calls from ISEC are OK as they will
8839 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8840 needed, and 2 if a cyclical call-graph was found but no other reason
8841 for a stub was detected. If called from the top level, a return of
8842 2 means the same as a return of 0. */
8843
8844 static int
8845 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8846 {
8847 Elf_Internal_Rela *relstart, *rel;
8848 Elf_Internal_Sym *local_syms;
8849 int ret;
8850 struct ppc_link_hash_table *htab;
8851
8852 /* We know none of our code bearing sections will need toc stubs. */
8853 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8854 return 0;
8855
8856 if (isec->size == 0)
8857 return 0;
8858
8859 if (isec->output_section == NULL)
8860 return 0;
8861
8862 /* Hack for linux kernel. .fixup contains branches, but only back to
8863 the function that hit an exception. */
8864 if (strcmp (isec->name, ".fixup") == 0)
8865 return 0;
8866
8867 if (isec->reloc_count == 0)
8868 return 0;
8869
8870 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8871 info->keep_memory);
8872 if (relstart == NULL)
8873 return -1;
8874
8875 /* Look for branches to outside of this section. */
8876 local_syms = NULL;
8877 ret = 0;
8878 htab = ppc_hash_table (info);
8879 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8880 {
8881 enum elf_ppc64_reloc_type r_type;
8882 unsigned long r_symndx;
8883 struct elf_link_hash_entry *h;
8884 Elf_Internal_Sym *sym;
8885 asection *sym_sec;
8886 long *opd_adjust;
8887 bfd_vma sym_value;
8888 bfd_vma dest;
8889
8890 r_type = ELF64_R_TYPE (rel->r_info);
8891 if (r_type != R_PPC64_REL24
8892 && r_type != R_PPC64_REL14
8893 && r_type != R_PPC64_REL14_BRTAKEN
8894 && r_type != R_PPC64_REL14_BRNTAKEN)
8895 continue;
8896
8897 r_symndx = ELF64_R_SYM (rel->r_info);
8898 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8899 isec->owner))
8900 {
8901 ret = -1;
8902 break;
8903 }
8904
8905 /* Calls to dynamic lib functions go through a plt call stub
8906 that uses r2. Branches to undefined symbols might be a call
8907 using old-style dot symbols that can be satisfied by a plt
8908 call into a new-style dynamic library. */
8909 if (sym_sec == NULL)
8910 {
8911 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8912 if (eh != NULL
8913 && eh->oh != NULL
8914 && eh->oh->elf.plt.plist != NULL)
8915 {
8916 ret = 1;
8917 break;
8918 }
8919
8920 /* Ignore other undefined symbols. */
8921 continue;
8922 }
8923
8924 /* Assume branches to other sections not included in the link need
8925 stubs too, to cover -R and absolute syms. */
8926 if (sym_sec->output_section == NULL)
8927 {
8928 ret = 1;
8929 break;
8930 }
8931
8932 if (h == NULL)
8933 sym_value = sym->st_value;
8934 else
8935 {
8936 if (h->root.type != bfd_link_hash_defined
8937 && h->root.type != bfd_link_hash_defweak)
8938 abort ();
8939 sym_value = h->root.u.def.value;
8940 }
8941 sym_value += rel->r_addend;
8942
8943 /* If this branch reloc uses an opd sym, find the code section. */
8944 opd_adjust = get_opd_info (sym_sec);
8945 if (opd_adjust != NULL)
8946 {
8947 if (h == NULL)
8948 {
8949 long adjust;
8950
8951 adjust = opd_adjust[sym->st_value / 8];
8952 if (adjust == -1)
8953 /* Assume deleted functions won't ever be called. */
8954 continue;
8955 sym_value += adjust;
8956 }
8957
8958 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8959 if (dest == (bfd_vma) -1)
8960 continue;
8961 }
8962 else
8963 dest = (sym_value
8964 + sym_sec->output_offset
8965 + sym_sec->output_section->vma);
8966
8967 /* Ignore branch to self. */
8968 if (sym_sec == isec)
8969 continue;
8970
8971 /* If the called function uses the toc, we need a stub. */
8972 if (sym_sec->has_toc_reloc
8973 || sym_sec->makes_toc_func_call)
8974 {
8975 ret = 1;
8976 break;
8977 }
8978
8979 /* Assume any branch that needs a long branch stub might in fact
8980 need a plt_branch stub. A plt_branch stub uses r2. */
8981 else if (dest - (isec->output_offset
8982 + isec->output_section->vma
8983 + rel->r_offset) + (1 << 25) >= (2 << 25))
8984 {
8985 ret = 1;
8986 break;
8987 }
8988
8989 /* If calling back to a section in the process of being tested, we
8990 can't say for sure that no toc adjusting stubs are needed, so
8991 don't return zero. */
8992 else if (sym_sec->call_check_in_progress)
8993 ret = 2;
8994
8995 /* Branches to another section that itself doesn't have any TOC
8996 references are OK. Recursively call ourselves to check. */
8997 else if (sym_sec->id <= htab->top_id
8998 && htab->stub_group[sym_sec->id].toc_off == 0)
8999 {
9000 int recur;
9001
9002 /* Mark current section as indeterminate, so that other
9003 sections that call back to current won't be marked as
9004 known. */
9005 isec->call_check_in_progress = 1;
9006 recur = toc_adjusting_stub_needed (info, sym_sec);
9007 isec->call_check_in_progress = 0;
9008
9009 if (recur < 0)
9010 {
9011 /* An error. Exit. */
9012 ret = -1;
9013 break;
9014 }
9015 else if (recur <= 1)
9016 {
9017 /* Known result. Mark as checked and set section flag. */
9018 htab->stub_group[sym_sec->id].toc_off = 1;
9019 if (recur != 0)
9020 {
9021 sym_sec->makes_toc_func_call = 1;
9022 ret = 1;
9023 break;
9024 }
9025 }
9026 else
9027 {
9028 /* Unknown result. Continue checking. */
9029 ret = 2;
9030 }
9031 }
9032 }
9033
9034 if (local_syms != NULL
9035 && (elf_tdata (isec->owner)->symtab_hdr.contents
9036 != (unsigned char *) local_syms))
9037 free (local_syms);
9038 if (elf_section_data (isec)->relocs != relstart)
9039 free (relstart);
9040
9041 return ret;
9042 }
9043
9044 /* The linker repeatedly calls this function for each input section,
9045 in the order that input sections are linked into output sections.
9046 Build lists of input sections to determine groupings between which
9047 we may insert linker stubs. */
9048
9049 bfd_boolean
9050 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9051 {
9052 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9053
9054 if ((isec->output_section->flags & SEC_CODE) != 0
9055 && isec->output_section->index <= htab->top_index)
9056 {
9057 asection **list = htab->input_list + isec->output_section->index;
9058 /* Steal the link_sec pointer for our list. */
9059 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9060 /* This happens to make the list in reverse order,
9061 which is what we want. */
9062 PREV_SEC (isec) = *list;
9063 *list = isec;
9064 }
9065
9066 if (htab->multi_toc_needed)
9067 {
9068 /* If a code section has a function that uses the TOC then we need
9069 to use the right TOC (obviously). Also, make sure that .opd gets
9070 the correct TOC value for R_PPC64_TOC relocs that don't have or
9071 can't find their function symbol (shouldn't ever happen now). */
9072 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
9073 {
9074 if (elf_gp (isec->owner) != 0)
9075 htab->toc_curr = elf_gp (isec->owner);
9076 }
9077 else if (htab->stub_group[isec->id].toc_off == 0)
9078 {
9079 int ret = toc_adjusting_stub_needed (info, isec);
9080 if (ret < 0)
9081 return FALSE;
9082 else
9083 isec->makes_toc_func_call = ret & 1;
9084 }
9085 }
9086
9087 /* Functions that don't use the TOC can belong in any TOC group.
9088 Use the last TOC base. This happens to make _init and _fini
9089 pasting work. */
9090 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9091 return TRUE;
9092 }
9093
9094 /* See whether we can group stub sections together. Grouping stub
9095 sections may result in fewer stubs. More importantly, we need to
9096 put all .init* and .fini* stubs at the beginning of the .init or
9097 .fini output sections respectively, because glibc splits the
9098 _init and _fini functions into multiple parts. Putting a stub in
9099 the middle of a function is not a good idea. */
9100
9101 static void
9102 group_sections (struct ppc_link_hash_table *htab,
9103 bfd_size_type stub_group_size,
9104 bfd_boolean stubs_always_before_branch)
9105 {
9106 asection **list;
9107 bfd_size_type stub14_group_size;
9108 bfd_boolean suppress_size_errors;
9109
9110 suppress_size_errors = FALSE;
9111 stub14_group_size = stub_group_size;
9112 if (stub_group_size == 1)
9113 {
9114 /* Default values. */
9115 if (stubs_always_before_branch)
9116 {
9117 stub_group_size = 0x1e00000;
9118 stub14_group_size = 0x7800;
9119 }
9120 else
9121 {
9122 stub_group_size = 0x1c00000;
9123 stub14_group_size = 0x7000;
9124 }
9125 suppress_size_errors = TRUE;
9126 }
9127
9128 list = htab->input_list + htab->top_index;
9129 do
9130 {
9131 asection *tail = *list;
9132 while (tail != NULL)
9133 {
9134 asection *curr;
9135 asection *prev;
9136 bfd_size_type total;
9137 bfd_boolean big_sec;
9138 bfd_vma curr_toc;
9139
9140 curr = tail;
9141 total = tail->size;
9142 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9143 ? stub14_group_size : stub_group_size);
9144 if (big_sec && !suppress_size_errors)
9145 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9146 tail->owner, tail);
9147 curr_toc = htab->stub_group[tail->id].toc_off;
9148
9149 while ((prev = PREV_SEC (curr)) != NULL
9150 && ((total += curr->output_offset - prev->output_offset)
9151 < (ppc64_elf_section_data (prev)->has_14bit_branch
9152 ? stub14_group_size : stub_group_size))
9153 && htab->stub_group[prev->id].toc_off == curr_toc)
9154 curr = prev;
9155
9156 /* OK, the size from the start of CURR to the end is less
9157 than stub_group_size and thus can be handled by one stub
9158 section. (or the tail section is itself larger than
9159 stub_group_size, in which case we may be toast.) We
9160 should really be keeping track of the total size of stubs
9161 added here, as stubs contribute to the final output
9162 section size. That's a little tricky, and this way will
9163 only break if stubs added make the total size more than
9164 2^25, ie. for the default stub_group_size, if stubs total
9165 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9166 do
9167 {
9168 prev = PREV_SEC (tail);
9169 /* Set up this stub group. */
9170 htab->stub_group[tail->id].link_sec = curr;
9171 }
9172 while (tail != curr && (tail = prev) != NULL);
9173
9174 /* But wait, there's more! Input sections up to stub_group_size
9175 bytes before the stub section can be handled by it too.
9176 Don't do this if we have a really large section after the
9177 stubs, as adding more stubs increases the chance that
9178 branches may not reach into the stub section. */
9179 if (!stubs_always_before_branch && !big_sec)
9180 {
9181 total = 0;
9182 while (prev != NULL
9183 && ((total += tail->output_offset - prev->output_offset)
9184 < (ppc64_elf_section_data (prev)->has_14bit_branch
9185 ? stub14_group_size : stub_group_size))
9186 && htab->stub_group[prev->id].toc_off == curr_toc)
9187 {
9188 tail = prev;
9189 prev = PREV_SEC (tail);
9190 htab->stub_group[tail->id].link_sec = curr;
9191 }
9192 }
9193 tail = prev;
9194 }
9195 }
9196 while (list-- != htab->input_list);
9197 free (htab->input_list);
9198 #undef PREV_SEC
9199 }
9200
9201 /* Determine and set the size of the stub section for a final link.
9202
9203 The basic idea here is to examine all the relocations looking for
9204 PC-relative calls to a target that is unreachable with a "bl"
9205 instruction. */
9206
9207 bfd_boolean
9208 ppc64_elf_size_stubs (bfd *output_bfd,
9209 struct bfd_link_info *info,
9210 bfd_signed_vma group_size,
9211 asection *(*add_stub_section) (const char *, asection *),
9212 void (*layout_sections_again) (void))
9213 {
9214 bfd_size_type stub_group_size;
9215 bfd_boolean stubs_always_before_branch;
9216 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9217
9218 /* Stash our params away. */
9219 htab->add_stub_section = add_stub_section;
9220 htab->layout_sections_again = layout_sections_again;
9221 stubs_always_before_branch = group_size < 0;
9222 if (group_size < 0)
9223 stub_group_size = -group_size;
9224 else
9225 stub_group_size = group_size;
9226
9227 group_sections (htab, stub_group_size, stubs_always_before_branch);
9228
9229 while (1)
9230 {
9231 bfd *input_bfd;
9232 unsigned int bfd_indx;
9233 asection *stub_sec;
9234
9235 htab->stub_iteration += 1;
9236
9237 for (input_bfd = info->input_bfds, bfd_indx = 0;
9238 input_bfd != NULL;
9239 input_bfd = input_bfd->link_next, bfd_indx++)
9240 {
9241 Elf_Internal_Shdr *symtab_hdr;
9242 asection *section;
9243 Elf_Internal_Sym *local_syms = NULL;
9244
9245 if (!is_ppc64_elf_target (input_bfd->xvec))
9246 continue;
9247
9248 /* We'll need the symbol table in a second. */
9249 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9250 if (symtab_hdr->sh_info == 0)
9251 continue;
9252
9253 /* Walk over each section attached to the input bfd. */
9254 for (section = input_bfd->sections;
9255 section != NULL;
9256 section = section->next)
9257 {
9258 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9259
9260 /* If there aren't any relocs, then there's nothing more
9261 to do. */
9262 if ((section->flags & SEC_RELOC) == 0
9263 || (section->flags & SEC_ALLOC) == 0
9264 || (section->flags & SEC_LOAD) == 0
9265 || (section->flags & SEC_CODE) == 0
9266 || section->reloc_count == 0)
9267 continue;
9268
9269 /* If this section is a link-once section that will be
9270 discarded, then don't create any stubs. */
9271 if (section->output_section == NULL
9272 || section->output_section->owner != output_bfd)
9273 continue;
9274
9275 /* Get the relocs. */
9276 internal_relocs
9277 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9278 info->keep_memory);
9279 if (internal_relocs == NULL)
9280 goto error_ret_free_local;
9281
9282 /* Now examine each relocation. */
9283 irela = internal_relocs;
9284 irelaend = irela + section->reloc_count;
9285 for (; irela < irelaend; irela++)
9286 {
9287 enum elf_ppc64_reloc_type r_type;
9288 unsigned int r_indx;
9289 enum ppc_stub_type stub_type;
9290 struct ppc_stub_hash_entry *stub_entry;
9291 asection *sym_sec, *code_sec;
9292 bfd_vma sym_value;
9293 bfd_vma destination;
9294 bfd_boolean ok_dest;
9295 struct ppc_link_hash_entry *hash;
9296 struct ppc_link_hash_entry *fdh;
9297 struct elf_link_hash_entry *h;
9298 Elf_Internal_Sym *sym;
9299 char *stub_name;
9300 const asection *id_sec;
9301 long *opd_adjust;
9302
9303 r_type = ELF64_R_TYPE (irela->r_info);
9304 r_indx = ELF64_R_SYM (irela->r_info);
9305
9306 if (r_type >= R_PPC64_max)
9307 {
9308 bfd_set_error (bfd_error_bad_value);
9309 goto error_ret_free_internal;
9310 }
9311
9312 /* Only look for stubs on branch instructions. */
9313 if (r_type != R_PPC64_REL24
9314 && r_type != R_PPC64_REL14
9315 && r_type != R_PPC64_REL14_BRTAKEN
9316 && r_type != R_PPC64_REL14_BRNTAKEN)
9317 continue;
9318
9319 /* Now determine the call target, its name, value,
9320 section. */
9321 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9322 r_indx, input_bfd))
9323 goto error_ret_free_internal;
9324 hash = (struct ppc_link_hash_entry *) h;
9325
9326 ok_dest = FALSE;
9327 fdh = NULL;
9328 sym_value = 0;
9329 if (hash == NULL)
9330 {
9331 sym_value = sym->st_value;
9332 ok_dest = TRUE;
9333 }
9334 else if (hash->elf.root.type == bfd_link_hash_defined
9335 || hash->elf.root.type == bfd_link_hash_defweak)
9336 {
9337 sym_value = hash->elf.root.u.def.value;
9338 if (sym_sec->output_section != NULL)
9339 ok_dest = TRUE;
9340 }
9341 else if (hash->elf.root.type == bfd_link_hash_undefweak
9342 || hash->elf.root.type == bfd_link_hash_undefined)
9343 {
9344 /* Recognise an old ABI func code entry sym, and
9345 use the func descriptor sym instead if it is
9346 defined. */
9347 if (hash->elf.root.root.string[0] == '.'
9348 && (fdh = get_fdh (hash, htab)) != NULL)
9349 {
9350 if (fdh->elf.root.type == bfd_link_hash_defined
9351 || fdh->elf.root.type == bfd_link_hash_defweak)
9352 {
9353 sym_sec = fdh->elf.root.u.def.section;
9354 sym_value = fdh->elf.root.u.def.value;
9355 if (sym_sec->output_section != NULL)
9356 ok_dest = TRUE;
9357 }
9358 else
9359 fdh = NULL;
9360 }
9361 }
9362 else
9363 {
9364 bfd_set_error (bfd_error_bad_value);
9365 goto error_ret_free_internal;
9366 }
9367
9368 destination = 0;
9369 if (ok_dest)
9370 {
9371 sym_value += irela->r_addend;
9372 destination = (sym_value
9373 + sym_sec->output_offset
9374 + sym_sec->output_section->vma);
9375 }
9376
9377 code_sec = sym_sec;
9378 opd_adjust = get_opd_info (sym_sec);
9379 if (opd_adjust != NULL)
9380 {
9381 bfd_vma dest;
9382
9383 if (hash == NULL)
9384 {
9385 long adjust = opd_adjust[sym_value / 8];
9386 if (adjust == -1)
9387 continue;
9388 sym_value += adjust;
9389 }
9390 dest = opd_entry_value (sym_sec, sym_value,
9391 &code_sec, &sym_value);
9392 if (dest != (bfd_vma) -1)
9393 {
9394 destination = dest;
9395 if (fdh != NULL)
9396 {
9397 /* Fixup old ABI sym to point at code
9398 entry. */
9399 hash->elf.root.type = bfd_link_hash_defweak;
9400 hash->elf.root.u.def.section = code_sec;
9401 hash->elf.root.u.def.value = sym_value;
9402 }
9403 }
9404 }
9405
9406 /* Determine what (if any) linker stub is needed. */
9407 stub_type = ppc_type_of_stub (section, irela, &hash,
9408 destination);
9409
9410 if (stub_type != ppc_stub_plt_call)
9411 {
9412 /* Check whether we need a TOC adjusting stub.
9413 Since the linker pastes together pieces from
9414 different object files when creating the
9415 _init and _fini functions, it may be that a
9416 call to what looks like a local sym is in
9417 fact a call needing a TOC adjustment. */
9418 if (code_sec != NULL
9419 && code_sec->output_section != NULL
9420 && (htab->stub_group[code_sec->id].toc_off
9421 != htab->stub_group[section->id].toc_off)
9422 && (code_sec->has_toc_reloc
9423 || code_sec->makes_toc_func_call))
9424 stub_type = ppc_stub_long_branch_r2off;
9425 }
9426
9427 if (stub_type == ppc_stub_none)
9428 continue;
9429
9430 /* __tls_get_addr calls might be eliminated. */
9431 if (stub_type != ppc_stub_plt_call
9432 && hash != NULL
9433 && (hash == htab->tls_get_addr
9434 || hash == htab->tls_get_addr_fd)
9435 && section->has_tls_reloc
9436 && irela != internal_relocs)
9437 {
9438 /* Get tls info. */
9439 char *tls_mask;
9440
9441 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9442 irela - 1, input_bfd))
9443 goto error_ret_free_internal;
9444 if (*tls_mask != 0)
9445 continue;
9446 }
9447
9448 /* Support for grouping stub sections. */
9449 id_sec = htab->stub_group[section->id].link_sec;
9450
9451 /* Get the name of this stub. */
9452 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9453 if (!stub_name)
9454 goto error_ret_free_internal;
9455
9456 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9457 stub_name, FALSE, FALSE);
9458 if (stub_entry != NULL)
9459 {
9460 /* The proper stub has already been created. */
9461 free (stub_name);
9462 continue;
9463 }
9464
9465 stub_entry = ppc_add_stub (stub_name, section, htab);
9466 if (stub_entry == NULL)
9467 {
9468 free (stub_name);
9469 error_ret_free_internal:
9470 if (elf_section_data (section)->relocs == NULL)
9471 free (internal_relocs);
9472 error_ret_free_local:
9473 if (local_syms != NULL
9474 && (symtab_hdr->contents
9475 != (unsigned char *) local_syms))
9476 free (local_syms);
9477 return FALSE;
9478 }
9479
9480 stub_entry->stub_type = stub_type;
9481 stub_entry->target_value = sym_value;
9482 stub_entry->target_section = code_sec;
9483 stub_entry->h = hash;
9484 stub_entry->addend = irela->r_addend;
9485
9486 if (stub_entry->h != NULL)
9487 htab->stub_globals += 1;
9488 }
9489
9490 /* We're done with the internal relocs, free them. */
9491 if (elf_section_data (section)->relocs != internal_relocs)
9492 free (internal_relocs);
9493 }
9494
9495 if (local_syms != NULL
9496 && symtab_hdr->contents != (unsigned char *) local_syms)
9497 {
9498 if (!info->keep_memory)
9499 free (local_syms);
9500 else
9501 symtab_hdr->contents = (unsigned char *) local_syms;
9502 }
9503 }
9504
9505 /* We may have added some stubs. Find out the new size of the
9506 stub sections. */
9507 for (stub_sec = htab->stub_bfd->sections;
9508 stub_sec != NULL;
9509 stub_sec = stub_sec->next)
9510 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9511 {
9512 stub_sec->rawsize = stub_sec->size;
9513 stub_sec->size = 0;
9514 stub_sec->reloc_count = 0;
9515 stub_sec->flags &= ~SEC_RELOC;
9516 }
9517
9518 htab->brlt->size = 0;
9519 htab->brlt->reloc_count = 0;
9520 htab->brlt->flags &= ~SEC_RELOC;
9521 if (htab->relbrlt != NULL)
9522 htab->relbrlt->size = 0;
9523
9524 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9525
9526 for (stub_sec = htab->stub_bfd->sections;
9527 stub_sec != NULL;
9528 stub_sec = stub_sec->next)
9529 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9530 && stub_sec->rawsize != stub_sec->size)
9531 break;
9532
9533 /* Exit from this loop when no stubs have been added, and no stubs
9534 have changed size. */
9535 if (stub_sec == NULL)
9536 break;
9537
9538 /* Ask the linker to do its stuff. */
9539 (*htab->layout_sections_again) ();
9540 }
9541
9542 /* It would be nice to strip htab->brlt from the output if the
9543 section is empty, but it's too late. If we strip sections here,
9544 the dynamic symbol table is corrupted since the section symbol
9545 for the stripped section isn't written. */
9546
9547 return TRUE;
9548 }
9549
9550 /* Called after we have determined section placement. If sections
9551 move, we'll be called again. Provide a value for TOCstart. */
9552
9553 bfd_vma
9554 ppc64_elf_toc (bfd *obfd)
9555 {
9556 asection *s;
9557 bfd_vma TOCstart;
9558
9559 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9560 order. The TOC starts where the first of these sections starts. */
9561 s = bfd_get_section_by_name (obfd, ".got");
9562 if (s == NULL)
9563 s = bfd_get_section_by_name (obfd, ".toc");
9564 if (s == NULL)
9565 s = bfd_get_section_by_name (obfd, ".tocbss");
9566 if (s == NULL)
9567 s = bfd_get_section_by_name (obfd, ".plt");
9568 if (s == NULL)
9569 {
9570 /* This may happen for
9571 o references to TOC base (SYM@toc / TOC[tc0]) without a
9572 .toc directive
9573 o bad linker script
9574 o --gc-sections and empty TOC sections
9575
9576 FIXME: Warn user? */
9577
9578 /* Look for a likely section. We probably won't even be
9579 using TOCstart. */
9580 for (s = obfd->sections; s != NULL; s = s->next)
9581 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9582 == (SEC_ALLOC | SEC_SMALL_DATA))
9583 break;
9584 if (s == NULL)
9585 for (s = obfd->sections; s != NULL; s = s->next)
9586 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9587 == (SEC_ALLOC | SEC_SMALL_DATA))
9588 break;
9589 if (s == NULL)
9590 for (s = obfd->sections; s != NULL; s = s->next)
9591 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9592 break;
9593 if (s == NULL)
9594 for (s = obfd->sections; s != NULL; s = s->next)
9595 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9596 break;
9597 }
9598
9599 TOCstart = 0;
9600 if (s != NULL)
9601 TOCstart = s->output_section->vma + s->output_offset;
9602
9603 return TOCstart;
9604 }
9605
9606 /* Build all the stubs associated with the current output file.
9607 The stubs are kept in a hash table attached to the main linker
9608 hash table. This function is called via gldelf64ppc_finish. */
9609
9610 bfd_boolean
9611 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9612 struct bfd_link_info *info,
9613 char **stats)
9614 {
9615 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9616 asection *stub_sec;
9617 bfd_byte *p;
9618 int stub_sec_count = 0;
9619
9620 htab->emit_stub_syms = emit_stub_syms;
9621
9622 /* Allocate memory to hold the linker stubs. */
9623 for (stub_sec = htab->stub_bfd->sections;
9624 stub_sec != NULL;
9625 stub_sec = stub_sec->next)
9626 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9627 && stub_sec->size != 0)
9628 {
9629 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9630 if (stub_sec->contents == NULL)
9631 return FALSE;
9632 /* We want to check that built size is the same as calculated
9633 size. rawsize is a convenient location to use. */
9634 stub_sec->rawsize = stub_sec->size;
9635 stub_sec->size = 0;
9636 }
9637
9638 if (htab->glink != NULL && htab->glink->size != 0)
9639 {
9640 unsigned int indx;
9641 bfd_vma plt0;
9642
9643 /* Build the .glink plt call stub. */
9644 if (htab->emit_stub_syms)
9645 {
9646 struct elf_link_hash_entry *h;
9647 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9648 if (h == NULL)
9649 return FALSE;
9650 if (h->root.type == bfd_link_hash_new)
9651 {
9652 h->root.type = bfd_link_hash_defined;
9653 h->root.u.def.section = htab->glink;
9654 h->root.u.def.value = 8;
9655 h->ref_regular = 1;
9656 h->def_regular = 1;
9657 h->ref_regular_nonweak = 1;
9658 h->forced_local = 1;
9659 h->non_elf = 0;
9660 }
9661 }
9662 p = htab->glink->contents;
9663 plt0 = (htab->plt->output_section->vma
9664 + htab->plt->output_offset
9665 - (htab->glink->output_section->vma
9666 + htab->glink->output_offset
9667 + 16));
9668 bfd_put_64 (htab->glink->owner, plt0, p);
9669 p += 8;
9670 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9671 p += 4;
9672 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9673 p += 4;
9674 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9675 p += 4;
9676 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9677 p += 4;
9678 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9679 p += 4;
9680 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9681 p += 4;
9682 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9683 p += 4;
9684 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9685 p += 4;
9686 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9687 p += 4;
9688 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9689 p += 4;
9690 bfd_put_32 (htab->glink->owner, BCTR, p);
9691 p += 4;
9692 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9693 {
9694 bfd_put_32 (htab->glink->owner, NOP, p);
9695 p += 4;
9696 }
9697
9698 /* Build the .glink lazy link call stubs. */
9699 indx = 0;
9700 while (p < htab->glink->contents + htab->glink->size)
9701 {
9702 if (indx < 0x8000)
9703 {
9704 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9705 p += 4;
9706 }
9707 else
9708 {
9709 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9710 p += 4;
9711 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9712 p += 4;
9713 }
9714 bfd_put_32 (htab->glink->owner,
9715 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9716 indx++;
9717 p += 4;
9718 }
9719 htab->glink->rawsize = p - htab->glink->contents;
9720 }
9721
9722 if (htab->brlt->size != 0)
9723 {
9724 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9725 htab->brlt->size);
9726 if (htab->brlt->contents == NULL)
9727 return FALSE;
9728 }
9729 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9730 {
9731 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9732 htab->relbrlt->size);
9733 if (htab->relbrlt->contents == NULL)
9734 return FALSE;
9735 }
9736
9737 /* Build the stubs as directed by the stub hash table. */
9738 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9739
9740 if (htab->relbrlt != NULL)
9741 htab->relbrlt->reloc_count = 0;
9742
9743 for (stub_sec = htab->stub_bfd->sections;
9744 stub_sec != NULL;
9745 stub_sec = stub_sec->next)
9746 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9747 {
9748 stub_sec_count += 1;
9749 if (stub_sec->rawsize != stub_sec->size)
9750 break;
9751 }
9752
9753 if (stub_sec != NULL
9754 || htab->glink->rawsize != htab->glink->size)
9755 {
9756 htab->stub_error = TRUE;
9757 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9758 }
9759
9760 if (htab->stub_error)
9761 return FALSE;
9762
9763 if (stats != NULL)
9764 {
9765 *stats = bfd_malloc (500);
9766 if (*stats == NULL)
9767 return FALSE;
9768
9769 sprintf (*stats, _("linker stubs in %u group%s\n"
9770 " branch %lu\n"
9771 " toc adjust %lu\n"
9772 " long branch %lu\n"
9773 " long toc adj %lu\n"
9774 " plt call %lu"),
9775 stub_sec_count,
9776 stub_sec_count == 1 ? "" : "s",
9777 htab->stub_count[ppc_stub_long_branch - 1],
9778 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9779 htab->stub_count[ppc_stub_plt_branch - 1],
9780 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9781 htab->stub_count[ppc_stub_plt_call - 1]);
9782 }
9783 return TRUE;
9784 }
9785
9786 /* This function undoes the changes made by add_symbol_adjust. */
9787
9788 static bfd_boolean
9789 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9790 {
9791 struct ppc_link_hash_entry *eh;
9792
9793 if (h->root.type == bfd_link_hash_indirect)
9794 return TRUE;
9795
9796 if (h->root.type == bfd_link_hash_warning)
9797 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9798
9799 eh = (struct ppc_link_hash_entry *) h;
9800 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9801 return TRUE;
9802
9803 eh->elf.root.type = bfd_link_hash_undefined;
9804 return TRUE;
9805 }
9806
9807 void
9808 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9809 {
9810 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9811 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9812 }
9813
9814 /* What to do when ld finds relocations against symbols defined in
9815 discarded sections. */
9816
9817 static unsigned int
9818 ppc64_elf_action_discarded (asection *sec)
9819 {
9820 if (strcmp (".opd", sec->name) == 0)
9821 return 0;
9822
9823 if (strcmp (".toc", sec->name) == 0)
9824 return 0;
9825
9826 if (strcmp (".toc1", sec->name) == 0)
9827 return 0;
9828
9829 return _bfd_elf_default_action_discarded (sec);
9830 }
9831
9832 /* The RELOCATE_SECTION function is called by the ELF backend linker
9833 to handle the relocations for a section.
9834
9835 The relocs are always passed as Rela structures; if the section
9836 actually uses Rel structures, the r_addend field will always be
9837 zero.
9838
9839 This function is responsible for adjust the section contents as
9840 necessary, and (if using Rela relocs and generating a
9841 relocatable output file) adjusting the reloc addend as
9842 necessary.
9843
9844 This function does not have to worry about setting the reloc
9845 address or the reloc symbol index.
9846
9847 LOCAL_SYMS is a pointer to the swapped in local symbols.
9848
9849 LOCAL_SECTIONS is an array giving the section in the input file
9850 corresponding to the st_shndx field of each local symbol.
9851
9852 The global hash table entry for the global symbols can be found
9853 via elf_sym_hashes (input_bfd).
9854
9855 When generating relocatable output, this function must handle
9856 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9857 going to be the section symbol corresponding to the output
9858 section, which means that the addend must be adjusted
9859 accordingly. */
9860
9861 static bfd_boolean
9862 ppc64_elf_relocate_section (bfd *output_bfd,
9863 struct bfd_link_info *info,
9864 bfd *input_bfd,
9865 asection *input_section,
9866 bfd_byte *contents,
9867 Elf_Internal_Rela *relocs,
9868 Elf_Internal_Sym *local_syms,
9869 asection **local_sections)
9870 {
9871 struct ppc_link_hash_table *htab;
9872 Elf_Internal_Shdr *symtab_hdr;
9873 struct elf_link_hash_entry **sym_hashes;
9874 Elf_Internal_Rela *rel;
9875 Elf_Internal_Rela *relend;
9876 Elf_Internal_Rela outrel;
9877 bfd_byte *loc;
9878 struct got_entry **local_got_ents;
9879 bfd_vma TOCstart;
9880 bfd_boolean ret = TRUE;
9881 bfd_boolean is_opd;
9882 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9883 bfd_boolean is_power4 = FALSE;
9884 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
9885
9886 /* Initialize howto table if needed. */
9887 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9888 ppc_howto_init ();
9889
9890 htab = ppc_hash_table (info);
9891
9892 /* Don't relocate stub sections. */
9893 if (input_section->owner == htab->stub_bfd)
9894 return TRUE;
9895
9896 local_got_ents = elf_local_got_ents (input_bfd);
9897 TOCstart = elf_gp (output_bfd);
9898 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9899 sym_hashes = elf_sym_hashes (input_bfd);
9900 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
9901
9902 rel = relocs;
9903 relend = relocs + input_section->reloc_count;
9904 for (; rel < relend; rel++)
9905 {
9906 enum elf_ppc64_reloc_type r_type;
9907 bfd_vma addend, orig_addend;
9908 bfd_reloc_status_type r;
9909 Elf_Internal_Sym *sym;
9910 asection *sec;
9911 struct elf_link_hash_entry *h_elf;
9912 struct ppc_link_hash_entry *h;
9913 struct ppc_link_hash_entry *fdh;
9914 const char *sym_name;
9915 unsigned long r_symndx, toc_symndx;
9916 char tls_mask, tls_gd, tls_type;
9917 char sym_type;
9918 bfd_vma relocation;
9919 bfd_boolean unresolved_reloc;
9920 bfd_boolean warned;
9921 unsigned long insn, mask;
9922 struct ppc_stub_hash_entry *stub_entry;
9923 bfd_vma max_br_offset;
9924 bfd_vma from;
9925
9926 r_type = ELF64_R_TYPE (rel->r_info);
9927 r_symndx = ELF64_R_SYM (rel->r_info);
9928
9929 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9930 symbol of the previous ADDR64 reloc. The symbol gives us the
9931 proper TOC base to use. */
9932 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9933 && rel != relocs
9934 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9935 && is_opd)
9936 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9937
9938 sym = NULL;
9939 sec = NULL;
9940 h_elf = NULL;
9941 sym_name = NULL;
9942 unresolved_reloc = FALSE;
9943 warned = FALSE;
9944 orig_addend = rel->r_addend;
9945
9946 if (r_symndx < symtab_hdr->sh_info)
9947 {
9948 /* It's a local symbol. */
9949 long *opd_adjust;
9950
9951 sym = local_syms + r_symndx;
9952 sec = local_sections[r_symndx];
9953 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9954 sym_type = ELF64_ST_TYPE (sym->st_info);
9955 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9956 opd_adjust = get_opd_info (sec);
9957 if (opd_adjust != NULL)
9958 {
9959 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9960 if (adjust == -1)
9961 relocation = 0;
9962 else
9963 {
9964 /* If this is a relocation against the opd section sym
9965 and we have edited .opd, adjust the reloc addend so
9966 that ld -r and ld --emit-relocs output is correct.
9967 If it is a reloc against some other .opd symbol,
9968 then the symbol value will be adjusted later. */
9969 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9970 rel->r_addend += adjust;
9971 else
9972 relocation += adjust;
9973 }
9974 }
9975 }
9976 else
9977 {
9978 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9979 r_symndx, symtab_hdr, sym_hashes,
9980 h_elf, sec, relocation,
9981 unresolved_reloc, warned);
9982 sym_name = h_elf->root.root.string;
9983 sym_type = h_elf->type;
9984 }
9985 h = (struct ppc_link_hash_entry *) h_elf;
9986
9987 if (sec != NULL && elf_discarded_section (sec))
9988 {
9989 /* For relocs against symbols from removed linkonce sections,
9990 or sections discarded by a linker script, we just want the
9991 section contents zeroed. Avoid any special processing. */
9992 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
9993 contents + rel->r_offset);
9994 rel->r_info = 0;
9995 rel->r_addend = 0;
9996 continue;
9997 }
9998
9999 if (info->relocatable)
10000 continue;
10001
10002 /* TLS optimizations. Replace instruction sequences and relocs
10003 based on information we collected in tls_optimize. We edit
10004 RELOCS so that --emit-relocs will output something sensible
10005 for the final instruction stream. */
10006 tls_mask = 0;
10007 tls_gd = 0;
10008 toc_symndx = 0;
10009 if (IS_PPC64_TLS_RELOC (r_type))
10010 {
10011 if (h != NULL)
10012 tls_mask = h->tls_mask;
10013 else if (local_got_ents != NULL)
10014 {
10015 char *lgot_masks;
10016 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10017 tls_mask = lgot_masks[r_symndx];
10018 }
10019 if (tls_mask == 0 && r_type == R_PPC64_TLS)
10020 {
10021 /* Check for toc tls entries. */
10022 char *toc_tls;
10023
10024 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10025 rel, input_bfd))
10026 return FALSE;
10027
10028 if (toc_tls)
10029 tls_mask = *toc_tls;
10030 }
10031 }
10032
10033 /* Check that tls relocs are used with tls syms, and non-tls
10034 relocs are used with non-tls syms. */
10035 if (r_symndx != 0
10036 && r_type != R_PPC64_NONE
10037 && (h == NULL
10038 || h->elf.root.type == bfd_link_hash_defined
10039 || h->elf.root.type == bfd_link_hash_defweak)
10040 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
10041 {
10042 if (r_type == R_PPC64_TLS && tls_mask != 0)
10043 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10044 ;
10045 else
10046 (*_bfd_error_handler)
10047 (sym_type == STT_TLS
10048 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10049 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10050 input_bfd,
10051 input_section,
10052 (long) rel->r_offset,
10053 ppc64_elf_howto_table[r_type]->name,
10054 sym_name);
10055 }
10056
10057 /* Ensure reloc mapping code below stays sane. */
10058 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10059 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10060 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10061 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10062 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10063 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10064 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10065 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10066 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10067 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10068 abort ();
10069
10070 switch (r_type)
10071 {
10072 default:
10073 break;
10074
10075 case R_PPC64_TOC16:
10076 case R_PPC64_TOC16_LO:
10077 case R_PPC64_TOC16_DS:
10078 case R_PPC64_TOC16_LO_DS:
10079 {
10080 /* Check for toc tls entries. */
10081 char *toc_tls;
10082 int retval;
10083
10084 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10085 rel, input_bfd);
10086 if (retval == 0)
10087 return FALSE;
10088
10089 if (toc_tls)
10090 {
10091 tls_mask = *toc_tls;
10092 if (r_type == R_PPC64_TOC16_DS
10093 || r_type == R_PPC64_TOC16_LO_DS)
10094 {
10095 if (tls_mask != 0
10096 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10097 goto toctprel;
10098 }
10099 else
10100 {
10101 /* If we found a GD reloc pair, then we might be
10102 doing a GD->IE transition. */
10103 if (retval == 2)
10104 {
10105 tls_gd = TLS_TPRELGD;
10106 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10107 goto tls_get_addr_check;
10108 }
10109 else if (retval == 3)
10110 {
10111 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10112 goto tls_get_addr_check;
10113 }
10114 }
10115 }
10116 }
10117 break;
10118
10119 case R_PPC64_GOT_TPREL16_DS:
10120 case R_PPC64_GOT_TPREL16_LO_DS:
10121 if (tls_mask != 0
10122 && (tls_mask & TLS_TPREL) == 0)
10123 {
10124 toctprel:
10125 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10126 insn &= 31 << 21;
10127 insn |= 0x3c0d0000; /* addis 0,13,0 */
10128 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10129 r_type = R_PPC64_TPREL16_HA;
10130 if (toc_symndx != 0)
10131 {
10132 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10133 /* We changed the symbol. Start over in order to
10134 get h, sym, sec etc. right. */
10135 rel--;
10136 continue;
10137 }
10138 else
10139 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10140 }
10141 break;
10142
10143 case R_PPC64_TLS:
10144 if (tls_mask != 0
10145 && (tls_mask & TLS_TPREL) == 0)
10146 {
10147 bfd_vma rtra;
10148 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10149 if ((insn & ((0x3f << 26) | (31 << 11)))
10150 == ((31 << 26) | (13 << 11)))
10151 rtra = insn & ((1 << 26) - (1 << 16));
10152 else if ((insn & ((0x3f << 26) | (31 << 16)))
10153 == ((31 << 26) | (13 << 16)))
10154 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10155 else
10156 abort ();
10157 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10158 /* add -> addi. */
10159 insn = 14 << 26;
10160 else if ((insn & (31 << 1)) == 23 << 1
10161 && ((insn & (31 << 6)) < 14 << 6
10162 || ((insn & (31 << 6)) >= 16 << 6
10163 && (insn & (31 << 6)) < 24 << 6)))
10164 /* load and store indexed -> dform. */
10165 insn = (32 | ((insn >> 6) & 31)) << 26;
10166 else if ((insn & (31 << 1)) == 21 << 1
10167 && (insn & (0x1a << 6)) == 0)
10168 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10169 insn = (((58 | ((insn >> 6) & 4)) << 26)
10170 | ((insn >> 6) & 1));
10171 else if ((insn & (31 << 1)) == 21 << 1
10172 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10173 /* lwax -> lwa. */
10174 insn = (58 << 26) | 2;
10175 else
10176 abort ();
10177 insn |= rtra;
10178 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10179 /* Was PPC64_TLS which sits on insn boundary, now
10180 PPC64_TPREL16_LO which is at low-order half-word. */
10181 rel->r_offset += d_offset;
10182 r_type = R_PPC64_TPREL16_LO;
10183 if (toc_symndx != 0)
10184 {
10185 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10186 /* We changed the symbol. Start over in order to
10187 get h, sym, sec etc. right. */
10188 rel--;
10189 continue;
10190 }
10191 else
10192 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10193 }
10194 break;
10195
10196 case R_PPC64_GOT_TLSGD16_HI:
10197 case R_PPC64_GOT_TLSGD16_HA:
10198 tls_gd = TLS_TPRELGD;
10199 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10200 goto tls_gdld_hi;
10201 break;
10202
10203 case R_PPC64_GOT_TLSLD16_HI:
10204 case R_PPC64_GOT_TLSLD16_HA:
10205 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10206 {
10207 tls_gdld_hi:
10208 if ((tls_mask & tls_gd) != 0)
10209 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10210 + R_PPC64_GOT_TPREL16_DS);
10211 else
10212 {
10213 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10214 rel->r_offset -= d_offset;
10215 r_type = R_PPC64_NONE;
10216 }
10217 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10218 }
10219 break;
10220
10221 case R_PPC64_GOT_TLSGD16:
10222 case R_PPC64_GOT_TLSGD16_LO:
10223 tls_gd = TLS_TPRELGD;
10224 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10225 goto tls_get_addr_check;
10226 break;
10227
10228 case R_PPC64_GOT_TLSLD16:
10229 case R_PPC64_GOT_TLSLD16_LO:
10230 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10231 {
10232 tls_get_addr_check:
10233 if (rel + 1 < relend)
10234 {
10235 enum elf_ppc64_reloc_type r_type2;
10236 unsigned long r_symndx2;
10237 struct elf_link_hash_entry *h2;
10238 bfd_vma insn1, insn2, insn3;
10239 bfd_vma offset;
10240
10241 /* The next instruction should be a call to
10242 __tls_get_addr. Peek at the reloc to be sure. */
10243 r_type2 = ELF64_R_TYPE (rel[1].r_info);
10244 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
10245 if (r_symndx2 < symtab_hdr->sh_info
10246 || (r_type2 != R_PPC64_REL14
10247 && r_type2 != R_PPC64_REL14_BRTAKEN
10248 && r_type2 != R_PPC64_REL14_BRNTAKEN
10249 && r_type2 != R_PPC64_REL24))
10250 break;
10251
10252 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
10253 while (h2->root.type == bfd_link_hash_indirect
10254 || h2->root.type == bfd_link_hash_warning)
10255 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
10256 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
10257 && h2 != &htab->tls_get_addr_fd->elf))
10258 break;
10259
10260 /* OK, it checks out. Replace the call. */
10261 offset = rel[1].r_offset;
10262 insn1 = bfd_get_32 (output_bfd,
10263 contents + rel->r_offset - d_offset);
10264 insn3 = bfd_get_32 (output_bfd,
10265 contents + offset + 4);
10266 if ((tls_mask & tls_gd) != 0)
10267 {
10268 /* IE */
10269 insn1 &= (1 << 26) - (1 << 2);
10270 insn1 |= 58 << 26; /* ld */
10271 insn2 = 0x7c636a14; /* add 3,3,13 */
10272 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
10273 if ((tls_mask & TLS_EXPLICIT) == 0)
10274 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10275 + R_PPC64_GOT_TPREL16_DS);
10276 else
10277 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10278 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10279 }
10280 else
10281 {
10282 /* LE */
10283 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10284 insn2 = 0x38630000; /* addi 3,3,0 */
10285 if (tls_gd == 0)
10286 {
10287 /* Was an LD reloc. */
10288 r_symndx = 0;
10289 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10290 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10291 }
10292 else if (toc_symndx != 0)
10293 r_symndx = toc_symndx;
10294 r_type = R_PPC64_TPREL16_HA;
10295 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10296 rel[1].r_info = ELF64_R_INFO (r_symndx,
10297 R_PPC64_TPREL16_LO);
10298 rel[1].r_offset += d_offset;
10299 }
10300 if (insn3 == NOP
10301 || insn3 == CROR_151515 || insn3 == CROR_313131)
10302 {
10303 insn3 = insn2;
10304 insn2 = NOP;
10305 rel[1].r_offset += 4;
10306 }
10307 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
10308 bfd_put_32 (output_bfd, insn2, contents + offset);
10309 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10310 if (tls_gd == 0 || toc_symndx != 0)
10311 {
10312 /* We changed the symbol. Start over in order
10313 to get h, sym, sec etc. right. */
10314 rel--;
10315 continue;
10316 }
10317 }
10318 }
10319 break;
10320
10321 case R_PPC64_DTPMOD64:
10322 if (rel + 1 < relend
10323 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10324 && rel[1].r_offset == rel->r_offset + 8)
10325 {
10326 if ((tls_mask & TLS_GD) == 0)
10327 {
10328 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10329 if ((tls_mask & TLS_TPRELGD) != 0)
10330 r_type = R_PPC64_TPREL64;
10331 else
10332 {
10333 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10334 r_type = R_PPC64_NONE;
10335 }
10336 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10337 }
10338 }
10339 else
10340 {
10341 if ((tls_mask & TLS_LD) == 0)
10342 {
10343 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10344 r_type = R_PPC64_NONE;
10345 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10346 }
10347 }
10348 break;
10349
10350 case R_PPC64_TPREL64:
10351 if ((tls_mask & TLS_TPREL) == 0)
10352 {
10353 r_type = R_PPC64_NONE;
10354 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10355 }
10356 break;
10357 }
10358
10359 /* Handle other relocations that tweak non-addend part of insn. */
10360 insn = 0;
10361 max_br_offset = 1 << 25;
10362 addend = rel->r_addend;
10363 switch (r_type)
10364 {
10365 default:
10366 break;
10367
10368 /* Branch taken prediction relocations. */
10369 case R_PPC64_ADDR14_BRTAKEN:
10370 case R_PPC64_REL14_BRTAKEN:
10371 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10372 /* Fall thru. */
10373
10374 /* Branch not taken prediction relocations. */
10375 case R_PPC64_ADDR14_BRNTAKEN:
10376 case R_PPC64_REL14_BRNTAKEN:
10377 insn |= bfd_get_32 (output_bfd,
10378 contents + rel->r_offset) & ~(0x01 << 21);
10379 /* Fall thru. */
10380
10381 case R_PPC64_REL14:
10382 max_br_offset = 1 << 15;
10383 /* Fall thru. */
10384
10385 case R_PPC64_REL24:
10386 /* Calls to functions with a different TOC, such as calls to
10387 shared objects, need to alter the TOC pointer. This is
10388 done using a linkage stub. A REL24 branching to these
10389 linkage stubs needs to be followed by a nop, as the nop
10390 will be replaced with an instruction to restore the TOC
10391 base pointer. */
10392 stub_entry = NULL;
10393 fdh = h;
10394 if (((h != NULL
10395 && (((fdh = h->oh) != NULL
10396 && fdh->elf.plt.plist != NULL)
10397 || (fdh = h)->elf.plt.plist != NULL))
10398 || (sec != NULL
10399 && sec->output_section != NULL
10400 && sec->id <= htab->top_id
10401 && (htab->stub_group[sec->id].toc_off
10402 != htab->stub_group[input_section->id].toc_off)))
10403 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10404 rel, htab)) != NULL
10405 && (stub_entry->stub_type == ppc_stub_plt_call
10406 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10407 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10408 {
10409 bfd_boolean can_plt_call = FALSE;
10410
10411 if (rel->r_offset + 8 <= input_section->size)
10412 {
10413 unsigned long nop;
10414 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10415 if (nop == NOP
10416 || nop == CROR_151515 || nop == CROR_313131)
10417 {
10418 bfd_put_32 (input_bfd, LD_R2_40R1,
10419 contents + rel->r_offset + 4);
10420 can_plt_call = TRUE;
10421 }
10422 }
10423
10424 if (!can_plt_call)
10425 {
10426 if (stub_entry->stub_type == ppc_stub_plt_call)
10427 {
10428 /* If this is a plain branch rather than a branch
10429 and link, don't require a nop. However, don't
10430 allow tail calls in a shared library as they
10431 will result in r2 being corrupted. */
10432 unsigned long br;
10433 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10434 if (info->executable && (br & 1) == 0)
10435 can_plt_call = TRUE;
10436 else
10437 stub_entry = NULL;
10438 }
10439 else if (h != NULL
10440 && strcmp (h->elf.root.root.string,
10441 ".__libc_start_main") == 0)
10442 {
10443 /* Allow crt1 branch to go via a toc adjusting stub. */
10444 can_plt_call = TRUE;
10445 }
10446 else
10447 {
10448 if (strcmp (input_section->output_section->name,
10449 ".init") == 0
10450 || strcmp (input_section->output_section->name,
10451 ".fini") == 0)
10452 (*_bfd_error_handler)
10453 (_("%B(%A+0x%lx): automatic multiple TOCs "
10454 "not supported using your crt files; "
10455 "recompile with -mminimal-toc or upgrade gcc"),
10456 input_bfd,
10457 input_section,
10458 (long) rel->r_offset);
10459 else
10460 (*_bfd_error_handler)
10461 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10462 "does not allow automatic multiple TOCs; "
10463 "recompile with -mminimal-toc or "
10464 "-fno-optimize-sibling-calls, "
10465 "or make `%s' extern"),
10466 input_bfd,
10467 input_section,
10468 (long) rel->r_offset,
10469 sym_name,
10470 sym_name);
10471 bfd_set_error (bfd_error_bad_value);
10472 ret = FALSE;
10473 }
10474 }
10475
10476 if (can_plt_call
10477 && stub_entry->stub_type == ppc_stub_plt_call)
10478 unresolved_reloc = FALSE;
10479 }
10480
10481 if (stub_entry == NULL
10482 && get_opd_info (sec) != NULL)
10483 {
10484 /* The branch destination is the value of the opd entry. */
10485 bfd_vma off = (relocation + addend
10486 - sec->output_section->vma
10487 - sec->output_offset);
10488 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10489 if (dest != (bfd_vma) -1)
10490 {
10491 relocation = dest;
10492 addend = 0;
10493 }
10494 }
10495
10496 /* If the branch is out of reach we ought to have a long
10497 branch stub. */
10498 from = (rel->r_offset
10499 + input_section->output_offset
10500 + input_section->output_section->vma);
10501
10502 if (stub_entry == NULL
10503 && (relocation + addend - from + max_br_offset
10504 >= 2 * max_br_offset)
10505 && r_type != R_PPC64_ADDR14_BRTAKEN
10506 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10507 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10508 htab);
10509
10510 if (stub_entry != NULL)
10511 {
10512 /* Munge up the value and addend so that we call the stub
10513 rather than the procedure directly. */
10514 relocation = (stub_entry->stub_offset
10515 + stub_entry->stub_sec->output_offset
10516 + stub_entry->stub_sec->output_section->vma);
10517 addend = 0;
10518 }
10519
10520 if (insn != 0)
10521 {
10522 if (is_power4)
10523 {
10524 /* Set 'a' bit. This is 0b00010 in BO field for branch
10525 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10526 for branch on CTR insns (BO == 1a00t or 1a01t). */
10527 if ((insn & (0x14 << 21)) == (0x04 << 21))
10528 insn |= 0x02 << 21;
10529 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10530 insn |= 0x08 << 21;
10531 else
10532 break;
10533 }
10534 else
10535 {
10536 /* Invert 'y' bit if not the default. */
10537 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10538 insn ^= 0x01 << 21;
10539 }
10540
10541 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10542 }
10543
10544 /* NOP out calls to undefined weak functions.
10545 We can thus call a weak function without first
10546 checking whether the function is defined. */
10547 else if (h != NULL
10548 && h->elf.root.type == bfd_link_hash_undefweak
10549 && r_type == R_PPC64_REL24
10550 && relocation == 0
10551 && addend == 0)
10552 {
10553 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10554 continue;
10555 }
10556 break;
10557 }
10558
10559 /* Set `addend'. */
10560 tls_type = 0;
10561 switch (r_type)
10562 {
10563 default:
10564 (*_bfd_error_handler)
10565 (_("%B: unknown relocation type %d for symbol %s"),
10566 input_bfd, (int) r_type, sym_name);
10567
10568 bfd_set_error (bfd_error_bad_value);
10569 ret = FALSE;
10570 continue;
10571
10572 case R_PPC64_NONE:
10573 case R_PPC64_TLS:
10574 case R_PPC64_GNU_VTINHERIT:
10575 case R_PPC64_GNU_VTENTRY:
10576 continue;
10577
10578 /* GOT16 relocations. Like an ADDR16 using the symbol's
10579 address in the GOT as relocation value instead of the
10580 symbol's value itself. Also, create a GOT entry for the
10581 symbol and put the symbol value there. */
10582 case R_PPC64_GOT_TLSGD16:
10583 case R_PPC64_GOT_TLSGD16_LO:
10584 case R_PPC64_GOT_TLSGD16_HI:
10585 case R_PPC64_GOT_TLSGD16_HA:
10586 tls_type = TLS_TLS | TLS_GD;
10587 goto dogot;
10588
10589 case R_PPC64_GOT_TLSLD16:
10590 case R_PPC64_GOT_TLSLD16_LO:
10591 case R_PPC64_GOT_TLSLD16_HI:
10592 case R_PPC64_GOT_TLSLD16_HA:
10593 tls_type = TLS_TLS | TLS_LD;
10594 goto dogot;
10595
10596 case R_PPC64_GOT_TPREL16_DS:
10597 case R_PPC64_GOT_TPREL16_LO_DS:
10598 case R_PPC64_GOT_TPREL16_HI:
10599 case R_PPC64_GOT_TPREL16_HA:
10600 tls_type = TLS_TLS | TLS_TPREL;
10601 goto dogot;
10602
10603 case R_PPC64_GOT_DTPREL16_DS:
10604 case R_PPC64_GOT_DTPREL16_LO_DS:
10605 case R_PPC64_GOT_DTPREL16_HI:
10606 case R_PPC64_GOT_DTPREL16_HA:
10607 tls_type = TLS_TLS | TLS_DTPREL;
10608 goto dogot;
10609
10610 case R_PPC64_GOT16:
10611 case R_PPC64_GOT16_LO:
10612 case R_PPC64_GOT16_HI:
10613 case R_PPC64_GOT16_HA:
10614 case R_PPC64_GOT16_DS:
10615 case R_PPC64_GOT16_LO_DS:
10616 dogot:
10617 {
10618 /* Relocation is to the entry for this symbol in the global
10619 offset table. */
10620 asection *got;
10621 bfd_vma *offp;
10622 bfd_vma off;
10623 unsigned long indx = 0;
10624
10625 if (tls_type == (TLS_TLS | TLS_LD)
10626 && (h == NULL
10627 || !h->elf.def_dynamic))
10628 offp = &ppc64_tlsld_got (input_bfd)->offset;
10629 else
10630 {
10631 struct got_entry *ent;
10632
10633 if (h != NULL)
10634 {
10635 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10636 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10637 &h->elf)
10638 || (info->shared
10639 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10640 /* This is actually a static link, or it is a
10641 -Bsymbolic link and the symbol is defined
10642 locally, or the symbol was forced to be local
10643 because of a version file. */
10644 ;
10645 else
10646 {
10647 indx = h->elf.dynindx;
10648 unresolved_reloc = FALSE;
10649 }
10650 ent = h->elf.got.glist;
10651 }
10652 else
10653 {
10654 if (local_got_ents == NULL)
10655 abort ();
10656 ent = local_got_ents[r_symndx];
10657 }
10658
10659 for (; ent != NULL; ent = ent->next)
10660 if (ent->addend == orig_addend
10661 && ent->owner == input_bfd
10662 && ent->tls_type == tls_type)
10663 break;
10664 if (ent == NULL)
10665 abort ();
10666 offp = &ent->got.offset;
10667 }
10668
10669 got = ppc64_elf_tdata (input_bfd)->got;
10670 if (got == NULL)
10671 abort ();
10672
10673 /* The offset must always be a multiple of 8. We use the
10674 least significant bit to record whether we have already
10675 processed this entry. */
10676 off = *offp;
10677 if ((off & 1) != 0)
10678 off &= ~1;
10679 else
10680 {
10681 /* Generate relocs for the dynamic linker, except in
10682 the case of TLSLD where we'll use one entry per
10683 module. */
10684 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10685
10686 *offp = off | 1;
10687 if ((info->shared || indx != 0)
10688 && (h == NULL
10689 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10690 || h->elf.root.type != bfd_link_hash_undefweak))
10691 {
10692 outrel.r_offset = (got->output_section->vma
10693 + got->output_offset
10694 + off);
10695 outrel.r_addend = addend;
10696 if (tls_type & (TLS_LD | TLS_GD))
10697 {
10698 outrel.r_addend = 0;
10699 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10700 if (tls_type == (TLS_TLS | TLS_GD))
10701 {
10702 loc = relgot->contents;
10703 loc += (relgot->reloc_count++
10704 * sizeof (Elf64_External_Rela));
10705 bfd_elf64_swap_reloca_out (output_bfd,
10706 &outrel, loc);
10707 outrel.r_offset += 8;
10708 outrel.r_addend = addend;
10709 outrel.r_info
10710 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10711 }
10712 }
10713 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10714 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10715 else if (tls_type == (TLS_TLS | TLS_TPREL))
10716 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10717 else if (indx == 0)
10718 {
10719 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10720
10721 /* Write the .got section contents for the sake
10722 of prelink. */
10723 loc = got->contents + off;
10724 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10725 loc);
10726 }
10727 else
10728 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10729
10730 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10731 {
10732 outrel.r_addend += relocation;
10733 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10734 outrel.r_addend -= htab->elf.tls_sec->vma;
10735 }
10736 loc = relgot->contents;
10737 loc += (relgot->reloc_count++
10738 * sizeof (Elf64_External_Rela));
10739 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10740 }
10741
10742 /* Init the .got section contents here if we're not
10743 emitting a reloc. */
10744 else
10745 {
10746 relocation += addend;
10747 if (tls_type == (TLS_TLS | TLS_LD))
10748 relocation = 1;
10749 else if (tls_type != 0)
10750 {
10751 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10752 if (tls_type == (TLS_TLS | TLS_TPREL))
10753 relocation += DTP_OFFSET - TP_OFFSET;
10754
10755 if (tls_type == (TLS_TLS | TLS_GD))
10756 {
10757 bfd_put_64 (output_bfd, relocation,
10758 got->contents + off + 8);
10759 relocation = 1;
10760 }
10761 }
10762
10763 bfd_put_64 (output_bfd, relocation,
10764 got->contents + off);
10765 }
10766 }
10767
10768 if (off >= (bfd_vma) -2)
10769 abort ();
10770
10771 relocation = got->output_offset + off;
10772
10773 /* TOC base (r2) is TOC start plus 0x8000. */
10774 addend = -TOC_BASE_OFF;
10775 }
10776 break;
10777
10778 case R_PPC64_PLT16_HA:
10779 case R_PPC64_PLT16_HI:
10780 case R_PPC64_PLT16_LO:
10781 case R_PPC64_PLT32:
10782 case R_PPC64_PLT64:
10783 /* Relocation is to the entry for this symbol in the
10784 procedure linkage table. */
10785
10786 /* Resolve a PLT reloc against a local symbol directly,
10787 without using the procedure linkage table. */
10788 if (h == NULL)
10789 break;
10790
10791 /* It's possible that we didn't make a PLT entry for this
10792 symbol. This happens when statically linking PIC code,
10793 or when using -Bsymbolic. Go find a match if there is a
10794 PLT entry. */
10795 if (htab->plt != NULL)
10796 {
10797 struct plt_entry *ent;
10798 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10799 if (ent->addend == orig_addend
10800 && ent->plt.offset != (bfd_vma) -1)
10801 {
10802 relocation = (htab->plt->output_section->vma
10803 + htab->plt->output_offset
10804 + ent->plt.offset);
10805 unresolved_reloc = FALSE;
10806 }
10807 }
10808 break;
10809
10810 case R_PPC64_TOC:
10811 /* Relocation value is TOC base. */
10812 relocation = TOCstart;
10813 if (r_symndx == 0)
10814 relocation += htab->stub_group[input_section->id].toc_off;
10815 else if (unresolved_reloc)
10816 ;
10817 else if (sec != NULL && sec->id <= htab->top_id)
10818 relocation += htab->stub_group[sec->id].toc_off;
10819 else
10820 unresolved_reloc = TRUE;
10821 goto dodyn;
10822
10823 /* TOC16 relocs. We want the offset relative to the TOC base,
10824 which is the address of the start of the TOC plus 0x8000.
10825 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10826 in this order. */
10827 case R_PPC64_TOC16:
10828 case R_PPC64_TOC16_LO:
10829 case R_PPC64_TOC16_HI:
10830 case R_PPC64_TOC16_DS:
10831 case R_PPC64_TOC16_LO_DS:
10832 case R_PPC64_TOC16_HA:
10833 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10834 break;
10835
10836 /* Relocate against the beginning of the section. */
10837 case R_PPC64_SECTOFF:
10838 case R_PPC64_SECTOFF_LO:
10839 case R_PPC64_SECTOFF_HI:
10840 case R_PPC64_SECTOFF_DS:
10841 case R_PPC64_SECTOFF_LO_DS:
10842 case R_PPC64_SECTOFF_HA:
10843 if (sec != NULL)
10844 addend -= sec->output_section->vma;
10845 break;
10846
10847 case R_PPC64_REL14:
10848 case R_PPC64_REL14_BRNTAKEN:
10849 case R_PPC64_REL14_BRTAKEN:
10850 case R_PPC64_REL24:
10851 break;
10852
10853 case R_PPC64_TPREL16:
10854 case R_PPC64_TPREL16_LO:
10855 case R_PPC64_TPREL16_HI:
10856 case R_PPC64_TPREL16_HA:
10857 case R_PPC64_TPREL16_DS:
10858 case R_PPC64_TPREL16_LO_DS:
10859 case R_PPC64_TPREL16_HIGHER:
10860 case R_PPC64_TPREL16_HIGHERA:
10861 case R_PPC64_TPREL16_HIGHEST:
10862 case R_PPC64_TPREL16_HIGHESTA:
10863 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10864 if (info->shared)
10865 /* The TPREL16 relocs shouldn't really be used in shared
10866 libs as they will result in DT_TEXTREL being set, but
10867 support them anyway. */
10868 goto dodyn;
10869 break;
10870
10871 case R_PPC64_DTPREL16:
10872 case R_PPC64_DTPREL16_LO:
10873 case R_PPC64_DTPREL16_HI:
10874 case R_PPC64_DTPREL16_HA:
10875 case R_PPC64_DTPREL16_DS:
10876 case R_PPC64_DTPREL16_LO_DS:
10877 case R_PPC64_DTPREL16_HIGHER:
10878 case R_PPC64_DTPREL16_HIGHERA:
10879 case R_PPC64_DTPREL16_HIGHEST:
10880 case R_PPC64_DTPREL16_HIGHESTA:
10881 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10882 break;
10883
10884 case R_PPC64_DTPMOD64:
10885 relocation = 1;
10886 addend = 0;
10887 goto dodyn;
10888
10889 case R_PPC64_TPREL64:
10890 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10891 goto dodyn;
10892
10893 case R_PPC64_DTPREL64:
10894 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10895 /* Fall thru */
10896
10897 /* Relocations that may need to be propagated if this is a
10898 dynamic object. */
10899 case R_PPC64_REL30:
10900 case R_PPC64_REL32:
10901 case R_PPC64_REL64:
10902 case R_PPC64_ADDR14:
10903 case R_PPC64_ADDR14_BRNTAKEN:
10904 case R_PPC64_ADDR14_BRTAKEN:
10905 case R_PPC64_ADDR16:
10906 case R_PPC64_ADDR16_DS:
10907 case R_PPC64_ADDR16_HA:
10908 case R_PPC64_ADDR16_HI:
10909 case R_PPC64_ADDR16_HIGHER:
10910 case R_PPC64_ADDR16_HIGHERA:
10911 case R_PPC64_ADDR16_HIGHEST:
10912 case R_PPC64_ADDR16_HIGHESTA:
10913 case R_PPC64_ADDR16_LO:
10914 case R_PPC64_ADDR16_LO_DS:
10915 case R_PPC64_ADDR24:
10916 case R_PPC64_ADDR32:
10917 case R_PPC64_ADDR64:
10918 case R_PPC64_UADDR16:
10919 case R_PPC64_UADDR32:
10920 case R_PPC64_UADDR64:
10921 dodyn:
10922 if ((input_section->flags & SEC_ALLOC) == 0)
10923 break;
10924
10925 if (NO_OPD_RELOCS && is_opd)
10926 break;
10927
10928 if ((info->shared
10929 && (h == NULL
10930 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10931 || h->elf.root.type != bfd_link_hash_undefweak)
10932 && (MUST_BE_DYN_RELOC (r_type)
10933 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10934 || (ELIMINATE_COPY_RELOCS
10935 && !info->shared
10936 && h != NULL
10937 && h->elf.dynindx != -1
10938 && !h->elf.non_got_ref
10939 && h->elf.def_dynamic
10940 && !h->elf.def_regular))
10941 {
10942 Elf_Internal_Rela outrel;
10943 bfd_boolean skip, relocate;
10944 asection *sreloc;
10945 bfd_byte *loc;
10946 bfd_vma out_off;
10947
10948 /* When generating a dynamic object, these relocations
10949 are copied into the output file to be resolved at run
10950 time. */
10951
10952 skip = FALSE;
10953 relocate = FALSE;
10954
10955 out_off = _bfd_elf_section_offset (output_bfd, info,
10956 input_section, rel->r_offset);
10957 if (out_off == (bfd_vma) -1)
10958 skip = TRUE;
10959 else if (out_off == (bfd_vma) -2)
10960 skip = TRUE, relocate = TRUE;
10961 out_off += (input_section->output_section->vma
10962 + input_section->output_offset);
10963 outrel.r_offset = out_off;
10964 outrel.r_addend = rel->r_addend;
10965
10966 /* Optimize unaligned reloc use. */
10967 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10968 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10969 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10970 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10971 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10972 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10973 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10974 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10975 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10976
10977 if (skip)
10978 memset (&outrel, 0, sizeof outrel);
10979 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10980 && !is_opd
10981 && r_type != R_PPC64_TOC)
10982 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10983 else
10984 {
10985 /* This symbol is local, or marked to become local,
10986 or this is an opd section reloc which must point
10987 at a local function. */
10988 outrel.r_addend += relocation;
10989 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10990 {
10991 if (is_opd && h != NULL)
10992 {
10993 /* Lie about opd entries. This case occurs
10994 when building shared libraries and we
10995 reference a function in another shared
10996 lib. The same thing happens for a weak
10997 definition in an application that's
10998 overridden by a strong definition in a
10999 shared lib. (I believe this is a generic
11000 bug in binutils handling of weak syms.)
11001 In these cases we won't use the opd
11002 entry in this lib. */
11003 unresolved_reloc = FALSE;
11004 }
11005 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11006
11007 /* We need to relocate .opd contents for ld.so.
11008 Prelink also wants simple and consistent rules
11009 for relocs. This make all RELATIVE relocs have
11010 *r_offset equal to r_addend. */
11011 relocate = TRUE;
11012 }
11013 else
11014 {
11015 long indx = 0;
11016
11017 if (bfd_is_abs_section (sec))
11018 ;
11019 else if (sec == NULL || sec->owner == NULL)
11020 {
11021 bfd_set_error (bfd_error_bad_value);
11022 return FALSE;
11023 }
11024 else
11025 {
11026 asection *osec;
11027
11028 osec = sec->output_section;
11029 indx = elf_section_data (osec)->dynindx;
11030
11031 if (indx == 0)
11032 {
11033 if ((osec->flags & SEC_READONLY) == 0
11034 && htab->elf.data_index_section != NULL)
11035 osec = htab->elf.data_index_section;
11036 else
11037 osec = htab->elf.text_index_section;
11038 indx = elf_section_data (osec)->dynindx;
11039 }
11040 BFD_ASSERT (indx != 0);
11041
11042 /* We are turning this relocation into one
11043 against a section symbol, so subtract out
11044 the output section's address but not the
11045 offset of the input section in the output
11046 section. */
11047 outrel.r_addend -= osec->vma;
11048 }
11049
11050 outrel.r_info = ELF64_R_INFO (indx, r_type);
11051 }
11052 }
11053
11054 sreloc = elf_section_data (input_section)->sreloc;
11055 if (sreloc == NULL)
11056 abort ();
11057
11058 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11059 >= sreloc->size)
11060 abort ();
11061 loc = sreloc->contents;
11062 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11063 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11064
11065 /* If this reloc is against an external symbol, it will
11066 be computed at runtime, so there's no need to do
11067 anything now. However, for the sake of prelink ensure
11068 that the section contents are a known value. */
11069 if (! relocate)
11070 {
11071 unresolved_reloc = FALSE;
11072 /* The value chosen here is quite arbitrary as ld.so
11073 ignores section contents except for the special
11074 case of .opd where the contents might be accessed
11075 before relocation. Choose zero, as that won't
11076 cause reloc overflow. */
11077 relocation = 0;
11078 addend = 0;
11079 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11080 to improve backward compatibility with older
11081 versions of ld. */
11082 if (r_type == R_PPC64_ADDR64)
11083 addend = outrel.r_addend;
11084 /* Adjust pc_relative relocs to have zero in *r_offset. */
11085 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11086 addend = (input_section->output_section->vma
11087 + input_section->output_offset
11088 + rel->r_offset);
11089 }
11090 }
11091 break;
11092
11093 case R_PPC64_COPY:
11094 case R_PPC64_GLOB_DAT:
11095 case R_PPC64_JMP_SLOT:
11096 case R_PPC64_RELATIVE:
11097 /* We shouldn't ever see these dynamic relocs in relocatable
11098 files. */
11099 /* Fall through. */
11100
11101 case R_PPC64_PLTGOT16:
11102 case R_PPC64_PLTGOT16_DS:
11103 case R_PPC64_PLTGOT16_HA:
11104 case R_PPC64_PLTGOT16_HI:
11105 case R_PPC64_PLTGOT16_LO:
11106 case R_PPC64_PLTGOT16_LO_DS:
11107 case R_PPC64_PLTREL32:
11108 case R_PPC64_PLTREL64:
11109 /* These ones haven't been implemented yet. */
11110
11111 (*_bfd_error_handler)
11112 (_("%B: relocation %s is not supported for symbol %s."),
11113 input_bfd,
11114 ppc64_elf_howto_table[r_type]->name, sym_name);
11115
11116 bfd_set_error (bfd_error_invalid_operation);
11117 ret = FALSE;
11118 continue;
11119 }
11120
11121 /* Do any further special processing. */
11122 switch (r_type)
11123 {
11124 default:
11125 break;
11126
11127 case R_PPC64_ADDR16_HA:
11128 case R_PPC64_ADDR16_HIGHERA:
11129 case R_PPC64_ADDR16_HIGHESTA:
11130 case R_PPC64_TOC16_HA:
11131 case R_PPC64_SECTOFF_HA:
11132 case R_PPC64_TPREL16_HA:
11133 case R_PPC64_DTPREL16_HA:
11134 case R_PPC64_TPREL16_HIGHER:
11135 case R_PPC64_TPREL16_HIGHERA:
11136 case R_PPC64_TPREL16_HIGHEST:
11137 case R_PPC64_TPREL16_HIGHESTA:
11138 case R_PPC64_DTPREL16_HIGHER:
11139 case R_PPC64_DTPREL16_HIGHERA:
11140 case R_PPC64_DTPREL16_HIGHEST:
11141 case R_PPC64_DTPREL16_HIGHESTA:
11142 /* It's just possible that this symbol is a weak symbol
11143 that's not actually defined anywhere. In that case,
11144 'sec' would be NULL, and we should leave the symbol
11145 alone (it will be set to zero elsewhere in the link). */
11146 if (sec == NULL)
11147 break;
11148 /* Fall thru */
11149
11150 case R_PPC64_GOT16_HA:
11151 case R_PPC64_PLTGOT16_HA:
11152 case R_PPC64_PLT16_HA:
11153 case R_PPC64_GOT_TLSGD16_HA:
11154 case R_PPC64_GOT_TLSLD16_HA:
11155 case R_PPC64_GOT_TPREL16_HA:
11156 case R_PPC64_GOT_DTPREL16_HA:
11157 /* Add 0x10000 if sign bit in 0:15 is set.
11158 Bits 0:15 are not used. */
11159 addend += 0x8000;
11160 break;
11161
11162 case R_PPC64_ADDR16_DS:
11163 case R_PPC64_ADDR16_LO_DS:
11164 case R_PPC64_GOT16_DS:
11165 case R_PPC64_GOT16_LO_DS:
11166 case R_PPC64_PLT16_LO_DS:
11167 case R_PPC64_SECTOFF_DS:
11168 case R_PPC64_SECTOFF_LO_DS:
11169 case R_PPC64_TOC16_DS:
11170 case R_PPC64_TOC16_LO_DS:
11171 case R_PPC64_PLTGOT16_DS:
11172 case R_PPC64_PLTGOT16_LO_DS:
11173 case R_PPC64_GOT_TPREL16_DS:
11174 case R_PPC64_GOT_TPREL16_LO_DS:
11175 case R_PPC64_GOT_DTPREL16_DS:
11176 case R_PPC64_GOT_DTPREL16_LO_DS:
11177 case R_PPC64_TPREL16_DS:
11178 case R_PPC64_TPREL16_LO_DS:
11179 case R_PPC64_DTPREL16_DS:
11180 case R_PPC64_DTPREL16_LO_DS:
11181 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11182 mask = 3;
11183 /* If this reloc is against an lq insn, then the value must be
11184 a multiple of 16. This is somewhat of a hack, but the
11185 "correct" way to do this by defining _DQ forms of all the
11186 _DS relocs bloats all reloc switches in this file. It
11187 doesn't seem to make much sense to use any of these relocs
11188 in data, so testing the insn should be safe. */
11189 if ((insn & (0x3f << 26)) == (56u << 26))
11190 mask = 15;
11191 if (((relocation + addend) & mask) != 0)
11192 {
11193 (*_bfd_error_handler)
11194 (_("%B: error: relocation %s not a multiple of %d"),
11195 input_bfd,
11196 ppc64_elf_howto_table[r_type]->name,
11197 mask + 1);
11198 bfd_set_error (bfd_error_bad_value);
11199 ret = FALSE;
11200 continue;
11201 }
11202 break;
11203 }
11204
11205 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11206 because such sections are not SEC_ALLOC and thus ld.so will
11207 not process them. */
11208 if (unresolved_reloc
11209 && !((input_section->flags & SEC_DEBUGGING) != 0
11210 && h->elf.def_dynamic))
11211 {
11212 (*_bfd_error_handler)
11213 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11214 input_bfd,
11215 input_section,
11216 (long) rel->r_offset,
11217 ppc64_elf_howto_table[(int) r_type]->name,
11218 h->elf.root.root.string);
11219 ret = FALSE;
11220 }
11221
11222 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11223 input_bfd,
11224 input_section,
11225 contents,
11226 rel->r_offset,
11227 relocation,
11228 addend);
11229
11230 if (r != bfd_reloc_ok)
11231 {
11232 if (sym_name == NULL)
11233 sym_name = "(null)";
11234 if (r == bfd_reloc_overflow)
11235 {
11236 if (warned)
11237 continue;
11238 if (h != NULL
11239 && h->elf.root.type == bfd_link_hash_undefweak
11240 && ppc64_elf_howto_table[r_type]->pc_relative)
11241 {
11242 /* Assume this is a call protected by other code that
11243 detects the symbol is undefined. If this is the case,
11244 we can safely ignore the overflow. If not, the
11245 program is hosed anyway, and a little warning isn't
11246 going to help. */
11247
11248 continue;
11249 }
11250
11251 if (!((*info->callbacks->reloc_overflow)
11252 (info, (h ? &h->elf.root : NULL), sym_name,
11253 ppc64_elf_howto_table[r_type]->name,
11254 orig_addend, input_bfd, input_section, rel->r_offset)))
11255 return FALSE;
11256 }
11257 else
11258 {
11259 (*_bfd_error_handler)
11260 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11261 input_bfd,
11262 input_section,
11263 (long) rel->r_offset,
11264 ppc64_elf_howto_table[r_type]->name,
11265 sym_name,
11266 (int) r);
11267 ret = FALSE;
11268 }
11269 }
11270 }
11271
11272 /* If we're emitting relocations, then shortly after this function
11273 returns, reloc offsets and addends for this section will be
11274 adjusted. Worse, reloc symbol indices will be for the output
11275 file rather than the input. Save a copy of the relocs for
11276 opd_entry_value. */
11277 if (is_opd && (info->emitrelocations || info->relocatable))
11278 {
11279 bfd_size_type amt;
11280 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11281 rel = bfd_alloc (input_bfd, amt);
11282 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11283 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11284 if (rel == NULL)
11285 return FALSE;
11286 memcpy (rel, relocs, amt);
11287 }
11288 return ret;
11289 }
11290
11291 /* Adjust the value of any local symbols in opd sections. */
11292
11293 static bfd_boolean
11294 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11295 const char *name ATTRIBUTE_UNUSED,
11296 Elf_Internal_Sym *elfsym,
11297 asection *input_sec,
11298 struct elf_link_hash_entry *h)
11299 {
11300 long *opd_adjust, adjust;
11301 bfd_vma value;
11302
11303 if (h != NULL)
11304 return TRUE;
11305
11306 opd_adjust = get_opd_info (input_sec);
11307 if (opd_adjust == NULL)
11308 return TRUE;
11309
11310 value = elfsym->st_value - input_sec->output_offset;
11311 if (!info->relocatable)
11312 value -= input_sec->output_section->vma;
11313
11314 adjust = opd_adjust[value / 8];
11315 if (adjust == -1)
11316 elfsym->st_value = 0;
11317 else
11318 elfsym->st_value += adjust;
11319 return TRUE;
11320 }
11321
11322 /* Finish up dynamic symbol handling. We set the contents of various
11323 dynamic sections here. */
11324
11325 static bfd_boolean
11326 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11327 struct bfd_link_info *info,
11328 struct elf_link_hash_entry *h,
11329 Elf_Internal_Sym *sym)
11330 {
11331 struct ppc_link_hash_table *htab;
11332 struct plt_entry *ent;
11333 Elf_Internal_Rela rela;
11334 bfd_byte *loc;
11335
11336 htab = ppc_hash_table (info);
11337
11338 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11339 if (ent->plt.offset != (bfd_vma) -1)
11340 {
11341 /* This symbol has an entry in the procedure linkage
11342 table. Set it up. */
11343
11344 if (htab->plt == NULL
11345 || htab->relplt == NULL
11346 || htab->glink == NULL)
11347 abort ();
11348
11349 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11350 fill in the PLT entry. */
11351 rela.r_offset = (htab->plt->output_section->vma
11352 + htab->plt->output_offset
11353 + ent->plt.offset);
11354 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11355 rela.r_addend = ent->addend;
11356
11357 loc = htab->relplt->contents;
11358 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11359 * sizeof (Elf64_External_Rela));
11360 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11361 }
11362
11363 if (h->needs_copy)
11364 {
11365 Elf_Internal_Rela rela;
11366 bfd_byte *loc;
11367
11368 /* This symbol needs a copy reloc. Set it up. */
11369
11370 if (h->dynindx == -1
11371 || (h->root.type != bfd_link_hash_defined
11372 && h->root.type != bfd_link_hash_defweak)
11373 || htab->relbss == NULL)
11374 abort ();
11375
11376 rela.r_offset = (h->root.u.def.value
11377 + h->root.u.def.section->output_section->vma
11378 + h->root.u.def.section->output_offset);
11379 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11380 rela.r_addend = 0;
11381 loc = htab->relbss->contents;
11382 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11383 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11384 }
11385
11386 /* Mark some specially defined symbols as absolute. */
11387 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11388 sym->st_shndx = SHN_ABS;
11389
11390 return TRUE;
11391 }
11392
11393 /* Used to decide how to sort relocs in an optimal manner for the
11394 dynamic linker, before writing them out. */
11395
11396 static enum elf_reloc_type_class
11397 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11398 {
11399 enum elf_ppc64_reloc_type r_type;
11400
11401 r_type = ELF64_R_TYPE (rela->r_info);
11402 switch (r_type)
11403 {
11404 case R_PPC64_RELATIVE:
11405 return reloc_class_relative;
11406 case R_PPC64_JMP_SLOT:
11407 return reloc_class_plt;
11408 case R_PPC64_COPY:
11409 return reloc_class_copy;
11410 default:
11411 return reloc_class_normal;
11412 }
11413 }
11414
11415 /* Finish up the dynamic sections. */
11416
11417 static bfd_boolean
11418 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11419 struct bfd_link_info *info)
11420 {
11421 struct ppc_link_hash_table *htab;
11422 bfd *dynobj;
11423 asection *sdyn;
11424
11425 htab = ppc_hash_table (info);
11426 dynobj = htab->elf.dynobj;
11427 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11428
11429 if (htab->elf.dynamic_sections_created)
11430 {
11431 Elf64_External_Dyn *dyncon, *dynconend;
11432
11433 if (sdyn == NULL || htab->got == NULL)
11434 abort ();
11435
11436 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11437 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11438 for (; dyncon < dynconend; dyncon++)
11439 {
11440 Elf_Internal_Dyn dyn;
11441 asection *s;
11442
11443 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11444
11445 switch (dyn.d_tag)
11446 {
11447 default:
11448 continue;
11449
11450 case DT_PPC64_GLINK:
11451 s = htab->glink;
11452 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11453 /* We stupidly defined DT_PPC64_GLINK to be the start
11454 of glink rather than the first entry point, which is
11455 what ld.so needs, and now have a bigger stub to
11456 support automatic multiple TOCs. */
11457 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11458 break;
11459
11460 case DT_PPC64_OPD:
11461 s = bfd_get_section_by_name (output_bfd, ".opd");
11462 if (s == NULL)
11463 continue;
11464 dyn.d_un.d_ptr = s->vma;
11465 break;
11466
11467 case DT_PPC64_OPDSZ:
11468 s = bfd_get_section_by_name (output_bfd, ".opd");
11469 if (s == NULL)
11470 continue;
11471 dyn.d_un.d_val = s->size;
11472 break;
11473
11474 case DT_PLTGOT:
11475 s = htab->plt;
11476 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11477 break;
11478
11479 case DT_JMPREL:
11480 s = htab->relplt;
11481 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11482 break;
11483
11484 case DT_PLTRELSZ:
11485 dyn.d_un.d_val = htab->relplt->size;
11486 break;
11487
11488 case DT_RELASZ:
11489 /* Don't count procedure linkage table relocs in the
11490 overall reloc count. */
11491 s = htab->relplt;
11492 if (s == NULL)
11493 continue;
11494 dyn.d_un.d_val -= s->size;
11495 break;
11496
11497 case DT_RELA:
11498 /* We may not be using the standard ELF linker script.
11499 If .rela.plt is the first .rela section, we adjust
11500 DT_RELA to not include it. */
11501 s = htab->relplt;
11502 if (s == NULL)
11503 continue;
11504 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11505 continue;
11506 dyn.d_un.d_ptr += s->size;
11507 break;
11508 }
11509
11510 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11511 }
11512 }
11513
11514 if (htab->got != NULL && htab->got->size != 0)
11515 {
11516 /* Fill in the first entry in the global offset table.
11517 We use it to hold the link-time TOCbase. */
11518 bfd_put_64 (output_bfd,
11519 elf_gp (output_bfd) + TOC_BASE_OFF,
11520 htab->got->contents);
11521
11522 /* Set .got entry size. */
11523 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11524 }
11525
11526 if (htab->plt != NULL && htab->plt->size != 0)
11527 {
11528 /* Set .plt entry size. */
11529 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11530 = PLT_ENTRY_SIZE;
11531 }
11532
11533 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11534 brlt ourselves if emitrelocations. */
11535 if (htab->brlt != NULL
11536 && htab->brlt->reloc_count != 0
11537 && !_bfd_elf_link_output_relocs (output_bfd,
11538 htab->brlt,
11539 &elf_section_data (htab->brlt)->rel_hdr,
11540 elf_section_data (htab->brlt)->relocs,
11541 NULL))
11542 return FALSE;
11543
11544 /* We need to handle writing out multiple GOT sections ourselves,
11545 since we didn't add them to DYNOBJ. We know dynobj is the first
11546 bfd. */
11547 while ((dynobj = dynobj->link_next) != NULL)
11548 {
11549 asection *s;
11550
11551 if (!is_ppc64_elf_target (dynobj->xvec))
11552 continue;
11553
11554 s = ppc64_elf_tdata (dynobj)->got;
11555 if (s != NULL
11556 && s->size != 0
11557 && s->output_section != bfd_abs_section_ptr
11558 && !bfd_set_section_contents (output_bfd, s->output_section,
11559 s->contents, s->output_offset,
11560 s->size))
11561 return FALSE;
11562 s = ppc64_elf_tdata (dynobj)->relgot;
11563 if (s != NULL
11564 && s->size != 0
11565 && s->output_section != bfd_abs_section_ptr
11566 && !bfd_set_section_contents (output_bfd, s->output_section,
11567 s->contents, s->output_offset,
11568 s->size))
11569 return FALSE;
11570 }
11571
11572 return TRUE;
11573 }
11574
11575 #include "elf64-target.h"
GDB Binutils - Deliverables
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