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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 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include <stdarg.h>
29 #include "bfd.h"
30 #include "sysdep.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36
37 static bfd_reloc_status_type ppc64_elf_ha_reloc
38 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
39 static bfd_reloc_status_type ppc64_elf_branch_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_toc_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc64_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_vma opd_entry_value
56 (asection *, bfd_vma, asection **, bfd_vma *);
57
58 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
59 #define TARGET_LITTLE_NAME "elf64-powerpcle"
60 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
61 #define TARGET_BIG_NAME "elf64-powerpc"
62 #define ELF_ARCH bfd_arch_powerpc
63 #define ELF_MACHINE_CODE EM_PPC64
64 #define ELF_MAXPAGESIZE 0x10000
65 #define ELF_COMMONPAGESIZE 0x1000
66 #define elf_info_to_howto ppc64_elf_info_to_howto
67
68 #define elf_backend_want_got_sym 0
69 #define elf_backend_want_plt_sym 0
70 #define elf_backend_plt_alignment 3
71 #define elf_backend_plt_not_loaded 1
72 #define elf_backend_got_header_size 8
73 #define elf_backend_can_gc_sections 1
74 #define elf_backend_can_refcount 1
75 #define elf_backend_rela_normal 1
76
77 #define bfd_elf64_mkobject ppc64_elf_mkobject
78 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
79 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
80 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
81 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
82 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
83 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
84
85 #define elf_backend_object_p ppc64_elf_object_p
86 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
87 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
88 #define elf_backend_write_core_note ppc64_elf_write_core_note
89 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
90 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
91 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
92 #define elf_backend_check_directives ppc64_elf_check_directives
93 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
94 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
95 #define elf_backend_check_relocs ppc64_elf_check_relocs
96 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
97 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
98 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
99 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
100 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
101 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
102 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
103 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
104 #define elf_backend_action_discarded ppc64_elf_action_discarded
105 #define elf_backend_relocate_section ppc64_elf_relocate_section
106 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
107 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
108 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
109 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
110 #define elf_backend_special_sections ppc64_elf_special_sections
111
112 /* The name of the dynamic interpreter. This is put in the .interp
113 section. */
114 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
115
116 /* The size in bytes of an entry in the procedure linkage table. */
117 #define PLT_ENTRY_SIZE 24
118
119 /* The initial size of the plt reserved for the dynamic linker. */
120 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
121
122 /* TOC base pointers offset from start of TOC. */
123 #define TOC_BASE_OFF 0x8000
124
125 /* Offset of tp and dtp pointers from start of TLS block. */
126 #define TP_OFFSET 0x7000
127 #define DTP_OFFSET 0x8000
128
129 /* .plt call stub instructions. The normal stub is like this, but
130 sometimes the .plt entry crosses a 64k boundary and we need to
131 insert an addis to adjust r12. */
132 #define PLT_CALL_STUB_SIZE (7*4)
133 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
134 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
135 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
136 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
137 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
138 /* ld %r11,xxx+16@l(%r12) */
139 #define BCTR 0x4e800420 /* bctr */
140
141
142 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
143 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
144 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
145
146 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
147
148 /* glink call stub instructions. We enter with the index in R0. */
149 #define GLINK_CALL_STUB_SIZE (16*4)
150 /* 0: */
151 /* .quad plt0-1f */
152 /* __glink: */
153 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
154 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
155 /* 1: */
156 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
157 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
158 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
159 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
160 /* ld %11,0(%12) */
161 /* ld %2,8(%12) */
162 /* mtctr %11 */
163 /* ld %11,16(%12) */
164 /* bctr */
165
166 /* Pad with this. */
167 #define NOP 0x60000000
168
169 /* Some other nops. */
170 #define CROR_151515 0x4def7b82
171 #define CROR_313131 0x4ffffb82
172
173 /* .glink entries for the first 32k functions are two instructions. */
174 #define LI_R0_0 0x38000000 /* li %r0,0 */
175 #define B_DOT 0x48000000 /* b . */
176
177 /* After that, we need two instructions to load the index, followed by
178 a branch. */
179 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
180 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
181
182 /* Instructions used by the save and restore reg functions. */
183 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
184 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
185 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
186 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
187 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
188 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
189 #define LI_R12_0 0x39800000 /* li %r12,0 */
190 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
191 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
192 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
193 #define BLR 0x4e800020 /* blr */
194
195 /* Since .opd is an array of descriptors and each entry will end up
196 with identical R_PPC64_RELATIVE relocs, there is really no need to
197 propagate .opd relocs; The dynamic linker should be taught to
198 relocate .opd without reloc entries. */
199 #ifndef NO_OPD_RELOCS
200 #define NO_OPD_RELOCS 0
201 #endif
202 \f
203 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
204
205 /* Relocation HOWTO's. */
206 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
207
208 static reloc_howto_type ppc64_elf_howto_raw[] = {
209 /* This reloc does nothing. */
210 HOWTO (R_PPC64_NONE, /* type */
211 0, /* rightshift */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
213 32, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_dont, /* complain_on_overflow */
217 bfd_elf_generic_reloc, /* special_function */
218 "R_PPC64_NONE", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 /* A standard 32 bit relocation. */
225 HOWTO (R_PPC64_ADDR32, /* type */
226 0, /* rightshift */
227 2, /* size (0 = byte, 1 = short, 2 = long) */
228 32, /* bitsize */
229 FALSE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_bitfield, /* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_PPC64_ADDR32", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 0xffffffff, /* dst_mask */
237 FALSE), /* pcrel_offset */
238
239 /* An absolute 26 bit branch; the lower two bits must be zero.
240 FIXME: we don't check that, we just clear them. */
241 HOWTO (R_PPC64_ADDR24, /* type */
242 0, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 26, /* bitsize */
245 FALSE, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_bitfield, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC64_ADDR24", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x03fffffc, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* A standard 16 bit relocation. */
256 HOWTO (R_PPC64_ADDR16, /* type */
257 0, /* rightshift */
258 1, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 0, /* bitpos */
262 complain_overflow_bitfield, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_PPC64_ADDR16", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0xffff, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* A 16 bit relocation without overflow. */
271 HOWTO (R_PPC64_ADDR16_LO, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_dont,/* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC64_ADDR16_LO", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xffff, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* Bits 16-31 of an address. */
286 HOWTO (R_PPC64_ADDR16_HI, /* type */
287 16, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 16, /* bitsize */
290 FALSE, /* pc_relative */
291 0, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_PPC64_ADDR16_HI", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0xffff, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
301 bits, treated as a signed number, is negative. */
302 HOWTO (R_PPC64_ADDR16_HA, /* type */
303 16, /* rightshift */
304 1, /* size (0 = byte, 1 = short, 2 = long) */
305 16, /* bitsize */
306 FALSE, /* pc_relative */
307 0, /* bitpos */
308 complain_overflow_dont, /* complain_on_overflow */
309 ppc64_elf_ha_reloc, /* special_function */
310 "R_PPC64_ADDR16_HA", /* name */
311 FALSE, /* partial_inplace */
312 0, /* src_mask */
313 0xffff, /* dst_mask */
314 FALSE), /* pcrel_offset */
315
316 /* An absolute 16 bit branch; the lower two bits must be zero.
317 FIXME: we don't check that, we just clear them. */
318 HOWTO (R_PPC64_ADDR14, /* type */
319 0, /* rightshift */
320 2, /* size (0 = byte, 1 = short, 2 = long) */
321 16, /* bitsize */
322 FALSE, /* pc_relative */
323 0, /* bitpos */
324 complain_overflow_bitfield, /* complain_on_overflow */
325 ppc64_elf_branch_reloc, /* special_function */
326 "R_PPC64_ADDR14", /* name */
327 FALSE, /* partial_inplace */
328 0, /* src_mask */
329 0x0000fffc, /* dst_mask */
330 FALSE), /* pcrel_offset */
331
332 /* An absolute 16 bit branch, for which bit 10 should be set to
333 indicate that the branch is expected to be taken. The lower two
334 bits must be zero. */
335 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_bitfield, /* complain_on_overflow */
342 ppc64_elf_brtaken_reloc, /* special_function */
343 "R_PPC64_ADDR14_BRTAKEN",/* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0x0000fffc, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* An absolute 16 bit branch, for which bit 10 should be set to
350 indicate that the branch is not expected to be taken. The lower
351 two bits must be zero. */
352 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 FALSE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_bitfield, /* complain_on_overflow */
359 ppc64_elf_brtaken_reloc, /* special_function */
360 "R_PPC64_ADDR14_BRNTAKEN",/* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0x0000fffc, /* dst_mask */
364 FALSE), /* pcrel_offset */
365
366 /* A relative 26 bit branch; the lower two bits must be zero. */
367 HOWTO (R_PPC64_REL24, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 26, /* bitsize */
371 TRUE, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_signed, /* complain_on_overflow */
374 ppc64_elf_branch_reloc, /* special_function */
375 "R_PPC64_REL24", /* name */
376 FALSE, /* partial_inplace */
377 0, /* src_mask */
378 0x03fffffc, /* dst_mask */
379 TRUE), /* pcrel_offset */
380
381 /* A relative 16 bit branch; the lower two bits must be zero. */
382 HOWTO (R_PPC64_REL14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 TRUE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_REL14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 TRUE), /* pcrel_offset */
395
396 /* A relative 16 bit branch. Bit 10 should be set to indicate that
397 the branch is expected to be taken. The lower two bits must be
398 zero. */
399 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 TRUE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_REL14_BRTAKEN", /* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 TRUE), /* pcrel_offset */
412
413 /* A relative 16 bit branch. Bit 10 should be set to indicate that
414 the branch is not expected to be taken. The lower two bits must
415 be zero. */
416 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 TRUE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_REL14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 TRUE), /* pcrel_offset */
429
430 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
431 symbol. */
432 HOWTO (R_PPC64_GOT16, /* type */
433 0, /* rightshift */
434 1, /* size (0 = byte, 1 = short, 2 = long) */
435 16, /* bitsize */
436 FALSE, /* pc_relative */
437 0, /* bitpos */
438 complain_overflow_signed, /* complain_on_overflow */
439 ppc64_elf_unhandled_reloc, /* special_function */
440 "R_PPC64_GOT16", /* name */
441 FALSE, /* partial_inplace */
442 0, /* src_mask */
443 0xffff, /* dst_mask */
444 FALSE), /* pcrel_offset */
445
446 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
447 the symbol. */
448 HOWTO (R_PPC64_GOT16_LO, /* type */
449 0, /* rightshift */
450 1, /* size (0 = byte, 1 = short, 2 = long) */
451 16, /* bitsize */
452 FALSE, /* pc_relative */
453 0, /* bitpos */
454 complain_overflow_dont, /* complain_on_overflow */
455 ppc64_elf_unhandled_reloc, /* special_function */
456 "R_PPC64_GOT16_LO", /* name */
457 FALSE, /* partial_inplace */
458 0, /* src_mask */
459 0xffff, /* dst_mask */
460 FALSE), /* pcrel_offset */
461
462 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
463 the symbol. */
464 HOWTO (R_PPC64_GOT16_HI, /* type */
465 16, /* rightshift */
466 1, /* size (0 = byte, 1 = short, 2 = long) */
467 16, /* bitsize */
468 FALSE, /* pc_relative */
469 0, /* bitpos */
470 complain_overflow_dont,/* complain_on_overflow */
471 ppc64_elf_unhandled_reloc, /* special_function */
472 "R_PPC64_GOT16_HI", /* name */
473 FALSE, /* partial_inplace */
474 0, /* src_mask */
475 0xffff, /* dst_mask */
476 FALSE), /* pcrel_offset */
477
478 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
479 the symbol. */
480 HOWTO (R_PPC64_GOT16_HA, /* type */
481 16, /* rightshift */
482 1, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 FALSE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_dont,/* complain_on_overflow */
487 ppc64_elf_unhandled_reloc, /* special_function */
488 "R_PPC64_GOT16_HA", /* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0xffff, /* dst_mask */
492 FALSE), /* pcrel_offset */
493
494 /* This is used only by the dynamic linker. The symbol should exist
495 both in the object being run and in some shared library. The
496 dynamic linker copies the data addressed by the symbol from the
497 shared library into the object, because the object being
498 run has to have the data at some particular address. */
499 HOWTO (R_PPC64_COPY, /* type */
500 0, /* rightshift */
501 0, /* this one is variable size */
502 0, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_dont, /* complain_on_overflow */
506 ppc64_elf_unhandled_reloc, /* special_function */
507 "R_PPC64_COPY", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Like R_PPC64_ADDR64, but used when setting global offset table
514 entries. */
515 HOWTO (R_PPC64_GLOB_DAT, /* type */
516 0, /* rightshift */
517 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
518 64, /* bitsize */
519 FALSE, /* pc_relative */
520 0, /* bitpos */
521 complain_overflow_dont, /* complain_on_overflow */
522 ppc64_elf_unhandled_reloc, /* special_function */
523 "R_PPC64_GLOB_DAT", /* name */
524 FALSE, /* partial_inplace */
525 0, /* src_mask */
526 ONES (64), /* dst_mask */
527 FALSE), /* pcrel_offset */
528
529 /* Created by the link editor. Marks a procedure linkage table
530 entry for a symbol. */
531 HOWTO (R_PPC64_JMP_SLOT, /* type */
532 0, /* rightshift */
533 0, /* size (0 = byte, 1 = short, 2 = long) */
534 0, /* bitsize */
535 FALSE, /* pc_relative */
536 0, /* bitpos */
537 complain_overflow_dont, /* complain_on_overflow */
538 ppc64_elf_unhandled_reloc, /* special_function */
539 "R_PPC64_JMP_SLOT", /* name */
540 FALSE, /* partial_inplace */
541 0, /* src_mask */
542 0, /* dst_mask */
543 FALSE), /* pcrel_offset */
544
545 /* Used only by the dynamic linker. When the object is run, this
546 doubleword64 is set to the load address of the object, plus the
547 addend. */
548 HOWTO (R_PPC64_RELATIVE, /* type */
549 0, /* rightshift */
550 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
551 64, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_dont, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC64_RELATIVE", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 ONES (64), /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC64_ADDR32, but may be unaligned. */
563 HOWTO (R_PPC64_UADDR32, /* type */
564 0, /* rightshift */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
566 32, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC64_UADDR32", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffffffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR16, but may be unaligned. */
578 HOWTO (R_PPC64_UADDR16, /* type */
579 0, /* rightshift */
580 1, /* size (0 = byte, 1 = short, 2 = long) */
581 16, /* bitsize */
582 FALSE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC64_UADDR16", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffff, /* dst_mask */
590 FALSE), /* pcrel_offset */
591
592 /* 32-bit PC relative. */
593 HOWTO (R_PPC64_REL32, /* type */
594 0, /* rightshift */
595 2, /* size (0 = byte, 1 = short, 2 = long) */
596 32, /* bitsize */
597 TRUE, /* pc_relative */
598 0, /* bitpos */
599 /* FIXME: Verify. Was complain_overflow_bitfield. */
600 complain_overflow_signed, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC64_REL32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0xffffffff, /* dst_mask */
606 TRUE), /* pcrel_offset */
607
608 /* 32-bit relocation to the symbol's procedure linkage table. */
609 HOWTO (R_PPC64_PLT32, /* type */
610 0, /* rightshift */
611 2, /* size (0 = byte, 1 = short, 2 = long) */
612 32, /* bitsize */
613 FALSE, /* pc_relative */
614 0, /* bitpos */
615 complain_overflow_bitfield, /* complain_on_overflow */
616 ppc64_elf_unhandled_reloc, /* special_function */
617 "R_PPC64_PLT32", /* name */
618 FALSE, /* partial_inplace */
619 0, /* src_mask */
620 0xffffffff, /* dst_mask */
621 FALSE), /* pcrel_offset */
622
623 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
624 FIXME: R_PPC64_PLTREL32 not supported. */
625 HOWTO (R_PPC64_PLTREL32, /* type */
626 0, /* rightshift */
627 2, /* size (0 = byte, 1 = short, 2 = long) */
628 32, /* bitsize */
629 TRUE, /* pc_relative */
630 0, /* bitpos */
631 complain_overflow_signed, /* complain_on_overflow */
632 bfd_elf_generic_reloc, /* special_function */
633 "R_PPC64_PLTREL32", /* name */
634 FALSE, /* partial_inplace */
635 0, /* src_mask */
636 0xffffffff, /* dst_mask */
637 TRUE), /* pcrel_offset */
638
639 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
640 the symbol. */
641 HOWTO (R_PPC64_PLT16_LO, /* type */
642 0, /* rightshift */
643 1, /* size (0 = byte, 1 = short, 2 = long) */
644 16, /* bitsize */
645 FALSE, /* pc_relative */
646 0, /* bitpos */
647 complain_overflow_dont, /* complain_on_overflow */
648 ppc64_elf_unhandled_reloc, /* special_function */
649 "R_PPC64_PLT16_LO", /* name */
650 FALSE, /* partial_inplace */
651 0, /* src_mask */
652 0xffff, /* dst_mask */
653 FALSE), /* pcrel_offset */
654
655 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
656 the symbol. */
657 HOWTO (R_PPC64_PLT16_HI, /* type */
658 16, /* rightshift */
659 1, /* size (0 = byte, 1 = short, 2 = long) */
660 16, /* bitsize */
661 FALSE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_dont, /* complain_on_overflow */
664 ppc64_elf_unhandled_reloc, /* special_function */
665 "R_PPC64_PLT16_HI", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffff, /* dst_mask */
669 FALSE), /* pcrel_offset */
670
671 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
672 the symbol. */
673 HOWTO (R_PPC64_PLT16_HA, /* type */
674 16, /* rightshift */
675 1, /* size (0 = byte, 1 = short, 2 = long) */
676 16, /* bitsize */
677 FALSE, /* pc_relative */
678 0, /* bitpos */
679 complain_overflow_dont, /* complain_on_overflow */
680 ppc64_elf_unhandled_reloc, /* special_function */
681 "R_PPC64_PLT16_HA", /* name */
682 FALSE, /* partial_inplace */
683 0, /* src_mask */
684 0xffff, /* dst_mask */
685 FALSE), /* pcrel_offset */
686
687 /* 16-bit section relative relocation. */
688 HOWTO (R_PPC64_SECTOFF, /* type */
689 0, /* rightshift */
690 1, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 FALSE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_bitfield, /* complain_on_overflow */
695 ppc64_elf_sectoff_reloc, /* special_function */
696 "R_PPC64_SECTOFF", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffff, /* dst_mask */
700 FALSE), /* pcrel_offset */
701
702 /* Like R_PPC64_SECTOFF, but no overflow warning. */
703 HOWTO (R_PPC64_SECTOFF_LO, /* type */
704 0, /* rightshift */
705 1, /* size (0 = byte, 1 = short, 2 = long) */
706 16, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_dont, /* complain_on_overflow */
710 ppc64_elf_sectoff_reloc, /* special_function */
711 "R_PPC64_SECTOFF_LO", /* name */
712 FALSE, /* partial_inplace */
713 0, /* src_mask */
714 0xffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 /* 16-bit upper half section relative relocation. */
718 HOWTO (R_PPC64_SECTOFF_HI, /* type */
719 16, /* rightshift */
720 1, /* size (0 = byte, 1 = short, 2 = long) */
721 16, /* bitsize */
722 FALSE, /* pc_relative */
723 0, /* bitpos */
724 complain_overflow_dont, /* complain_on_overflow */
725 ppc64_elf_sectoff_reloc, /* special_function */
726 "R_PPC64_SECTOFF_HI", /* name */
727 FALSE, /* partial_inplace */
728 0, /* src_mask */
729 0xffff, /* dst_mask */
730 FALSE), /* pcrel_offset */
731
732 /* 16-bit upper half adjusted section relative relocation. */
733 HOWTO (R_PPC64_SECTOFF_HA, /* type */
734 16, /* rightshift */
735 1, /* size (0 = byte, 1 = short, 2 = long) */
736 16, /* bitsize */
737 FALSE, /* pc_relative */
738 0, /* bitpos */
739 complain_overflow_dont, /* complain_on_overflow */
740 ppc64_elf_sectoff_ha_reloc, /* special_function */
741 "R_PPC64_SECTOFF_HA", /* name */
742 FALSE, /* partial_inplace */
743 0, /* src_mask */
744 0xffff, /* dst_mask */
745 FALSE), /* pcrel_offset */
746
747 /* Like R_PPC64_REL24 without touching the two least significant bits. */
748 HOWTO (R_PPC64_REL30, /* type */
749 2, /* rightshift */
750 2, /* size (0 = byte, 1 = short, 2 = long) */
751 30, /* bitsize */
752 TRUE, /* pc_relative */
753 0, /* bitpos */
754 complain_overflow_dont, /* complain_on_overflow */
755 bfd_elf_generic_reloc, /* special_function */
756 "R_PPC64_REL30", /* name */
757 FALSE, /* partial_inplace */
758 0, /* src_mask */
759 0xfffffffc, /* dst_mask */
760 TRUE), /* pcrel_offset */
761
762 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
763
764 /* A standard 64-bit relocation. */
765 HOWTO (R_PPC64_ADDR64, /* type */
766 0, /* rightshift */
767 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
768 64, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 bfd_elf_generic_reloc, /* special_function */
773 "R_PPC64_ADDR64", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 ONES (64), /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* The bits 32-47 of an address. */
780 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
781 32, /* rightshift */
782 1, /* size (0 = byte, 1 = short, 2 = long) */
783 16, /* bitsize */
784 FALSE, /* pc_relative */
785 0, /* bitpos */
786 complain_overflow_dont, /* complain_on_overflow */
787 bfd_elf_generic_reloc, /* special_function */
788 "R_PPC64_ADDR16_HIGHER", /* name */
789 FALSE, /* partial_inplace */
790 0, /* src_mask */
791 0xffff, /* dst_mask */
792 FALSE), /* pcrel_offset */
793
794 /* The bits 32-47 of an address, plus 1 if the contents of the low
795 16 bits, treated as a signed number, is negative. */
796 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
797 32, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_dont, /* complain_on_overflow */
803 ppc64_elf_ha_reloc, /* special_function */
804 "R_PPC64_ADDR16_HIGHERA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* The bits 48-63 of an address. */
811 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
812 48, /* rightshift */
813 1, /* size (0 = byte, 1 = short, 2 = long) */
814 16, /* bitsize */
815 FALSE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_ADDR16_HIGHEST", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xffff, /* dst_mask */
823 FALSE), /* pcrel_offset */
824
825 /* The bits 48-63 of an address, plus 1 if the contents of the low
826 16 bits, treated as a signed number, is negative. */
827 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
828 48, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc64_elf_ha_reloc, /* special_function */
835 "R_PPC64_ADDR16_HIGHESTA", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like ADDR64, but may be unaligned. */
842 HOWTO (R_PPC64_UADDR64, /* type */
843 0, /* rightshift */
844 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
845 64, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 bfd_elf_generic_reloc, /* special_function */
850 "R_PPC64_UADDR64", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 ONES (64), /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* 64-bit relative relocation. */
857 HOWTO (R_PPC64_REL64, /* type */
858 0, /* rightshift */
859 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
860 64, /* bitsize */
861 TRUE, /* pc_relative */
862 0, /* bitpos */
863 complain_overflow_dont, /* complain_on_overflow */
864 bfd_elf_generic_reloc, /* special_function */
865 "R_PPC64_REL64", /* name */
866 FALSE, /* partial_inplace */
867 0, /* src_mask */
868 ONES (64), /* dst_mask */
869 TRUE), /* pcrel_offset */
870
871 /* 64-bit relocation to the symbol's procedure linkage table. */
872 HOWTO (R_PPC64_PLT64, /* type */
873 0, /* rightshift */
874 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
875 64, /* bitsize */
876 FALSE, /* pc_relative */
877 0, /* bitpos */
878 complain_overflow_dont, /* complain_on_overflow */
879 ppc64_elf_unhandled_reloc, /* special_function */
880 "R_PPC64_PLT64", /* name */
881 FALSE, /* partial_inplace */
882 0, /* src_mask */
883 ONES (64), /* dst_mask */
884 FALSE), /* pcrel_offset */
885
886 /* 64-bit PC relative relocation to the symbol's procedure linkage
887 table. */
888 /* FIXME: R_PPC64_PLTREL64 not supported. */
889 HOWTO (R_PPC64_PLTREL64, /* type */
890 0, /* rightshift */
891 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
892 64, /* bitsize */
893 TRUE, /* pc_relative */
894 0, /* bitpos */
895 complain_overflow_dont, /* complain_on_overflow */
896 ppc64_elf_unhandled_reloc, /* special_function */
897 "R_PPC64_PLTREL64", /* name */
898 FALSE, /* partial_inplace */
899 0, /* src_mask */
900 ONES (64), /* dst_mask */
901 TRUE), /* pcrel_offset */
902
903 /* 16 bit TOC-relative relocation. */
904
905 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
906 HOWTO (R_PPC64_TOC16, /* type */
907 0, /* rightshift */
908 1, /* size (0 = byte, 1 = short, 2 = long) */
909 16, /* bitsize */
910 FALSE, /* pc_relative */
911 0, /* bitpos */
912 complain_overflow_signed, /* complain_on_overflow */
913 ppc64_elf_toc_reloc, /* special_function */
914 "R_PPC64_TOC16", /* name */
915 FALSE, /* partial_inplace */
916 0, /* src_mask */
917 0xffff, /* dst_mask */
918 FALSE), /* pcrel_offset */
919
920 /* 16 bit TOC-relative relocation without overflow. */
921
922 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
923 HOWTO (R_PPC64_TOC16_LO, /* type */
924 0, /* rightshift */
925 1, /* size (0 = byte, 1 = short, 2 = long) */
926 16, /* bitsize */
927 FALSE, /* pc_relative */
928 0, /* bitpos */
929 complain_overflow_dont, /* complain_on_overflow */
930 ppc64_elf_toc_reloc, /* special_function */
931 "R_PPC64_TOC16_LO", /* name */
932 FALSE, /* partial_inplace */
933 0, /* src_mask */
934 0xffff, /* dst_mask */
935 FALSE), /* pcrel_offset */
936
937 /* 16 bit TOC-relative relocation, high 16 bits. */
938
939 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
940 HOWTO (R_PPC64_TOC16_HI, /* type */
941 16, /* rightshift */
942 1, /* size (0 = byte, 1 = short, 2 = long) */
943 16, /* bitsize */
944 FALSE, /* pc_relative */
945 0, /* bitpos */
946 complain_overflow_dont, /* complain_on_overflow */
947 ppc64_elf_toc_reloc, /* special_function */
948 "R_PPC64_TOC16_HI", /* name */
949 FALSE, /* partial_inplace */
950 0, /* src_mask */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
953
954 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
955 contents of the low 16 bits, treated as a signed number, is
956 negative. */
957
958 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
959 HOWTO (R_PPC64_TOC16_HA, /* type */
960 16, /* rightshift */
961 1, /* size (0 = byte, 1 = short, 2 = long) */
962 16, /* bitsize */
963 FALSE, /* pc_relative */
964 0, /* bitpos */
965 complain_overflow_dont, /* complain_on_overflow */
966 ppc64_elf_toc_ha_reloc, /* special_function */
967 "R_PPC64_TOC16_HA", /* name */
968 FALSE, /* partial_inplace */
969 0, /* src_mask */
970 0xffff, /* dst_mask */
971 FALSE), /* pcrel_offset */
972
973 /* 64-bit relocation; insert value of TOC base (.TOC.). */
974
975 /* R_PPC64_TOC 51 doubleword64 .TOC. */
976 HOWTO (R_PPC64_TOC, /* type */
977 0, /* rightshift */
978 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
979 64, /* bitsize */
980 FALSE, /* pc_relative */
981 0, /* bitpos */
982 complain_overflow_bitfield, /* complain_on_overflow */
983 ppc64_elf_toc64_reloc, /* special_function */
984 "R_PPC64_TOC", /* name */
985 FALSE, /* partial_inplace */
986 0, /* src_mask */
987 ONES (64), /* dst_mask */
988 FALSE), /* pcrel_offset */
989
990 /* Like R_PPC64_GOT16, but also informs the link editor that the
991 value to relocate may (!) refer to a PLT entry which the link
992 editor (a) may replace with the symbol value. If the link editor
993 is unable to fully resolve the symbol, it may (b) create a PLT
994 entry and store the address to the new PLT entry in the GOT.
995 This permits lazy resolution of function symbols at run time.
996 The link editor may also skip all of this and just (c) emit a
997 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
998 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
999 HOWTO (R_PPC64_PLTGOT16, /* type */
1000 0, /* rightshift */
1001 1, /* size (0 = byte, 1 = short, 2 = long) */
1002 16, /* bitsize */
1003 FALSE, /* pc_relative */
1004 0, /* bitpos */
1005 complain_overflow_signed, /* complain_on_overflow */
1006 ppc64_elf_unhandled_reloc, /* special_function */
1007 "R_PPC64_PLTGOT16", /* name */
1008 FALSE, /* partial_inplace */
1009 0, /* src_mask */
1010 0xffff, /* dst_mask */
1011 FALSE), /* pcrel_offset */
1012
1013 /* Like R_PPC64_PLTGOT16, but without overflow. */
1014 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1015 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1016 0, /* rightshift */
1017 1, /* size (0 = byte, 1 = short, 2 = long) */
1018 16, /* bitsize */
1019 FALSE, /* pc_relative */
1020 0, /* bitpos */
1021 complain_overflow_dont, /* complain_on_overflow */
1022 ppc64_elf_unhandled_reloc, /* special_function */
1023 "R_PPC64_PLTGOT16_LO", /* name */
1024 FALSE, /* partial_inplace */
1025 0, /* src_mask */
1026 0xffff, /* dst_mask */
1027 FALSE), /* pcrel_offset */
1028
1029 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1030 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1031 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1032 16, /* rightshift */
1033 1, /* size (0 = byte, 1 = short, 2 = long) */
1034 16, /* bitsize */
1035 FALSE, /* pc_relative */
1036 0, /* bitpos */
1037 complain_overflow_dont, /* complain_on_overflow */
1038 ppc64_elf_unhandled_reloc, /* special_function */
1039 "R_PPC64_PLTGOT16_HI", /* name */
1040 FALSE, /* partial_inplace */
1041 0, /* src_mask */
1042 0xffff, /* dst_mask */
1043 FALSE), /* pcrel_offset */
1044
1045 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1046 1 if the contents of the low 16 bits, treated as a signed number,
1047 is negative. */
1048 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1049 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1050 16, /* rightshift */
1051 1, /* size (0 = byte, 1 = short, 2 = long) */
1052 16, /* bitsize */
1053 FALSE, /* pc_relative */
1054 0, /* bitpos */
1055 complain_overflow_dont,/* complain_on_overflow */
1056 ppc64_elf_unhandled_reloc, /* special_function */
1057 "R_PPC64_PLTGOT16_HA", /* name */
1058 FALSE, /* partial_inplace */
1059 0, /* src_mask */
1060 0xffff, /* dst_mask */
1061 FALSE), /* pcrel_offset */
1062
1063 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1064 HOWTO (R_PPC64_ADDR16_DS, /* type */
1065 0, /* rightshift */
1066 1, /* size (0 = byte, 1 = short, 2 = long) */
1067 16, /* bitsize */
1068 FALSE, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_bitfield, /* complain_on_overflow */
1071 bfd_elf_generic_reloc, /* special_function */
1072 "R_PPC64_ADDR16_DS", /* name */
1073 FALSE, /* partial_inplace */
1074 0, /* src_mask */
1075 0xfffc, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1077
1078 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1079 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1080 0, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 FALSE, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_dont,/* complain_on_overflow */
1086 bfd_elf_generic_reloc, /* special_function */
1087 "R_PPC64_ADDR16_LO_DS",/* name */
1088 FALSE, /* partial_inplace */
1089 0, /* src_mask */
1090 0xfffc, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1092
1093 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1094 HOWTO (R_PPC64_GOT16_DS, /* type */
1095 0, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_GOT16_DS", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xfffc, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1109 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1110 0, /* rightshift */
1111 1, /* size (0 = byte, 1 = short, 2 = long) */
1112 16, /* bitsize */
1113 FALSE, /* pc_relative */
1114 0, /* bitpos */
1115 complain_overflow_dont, /* complain_on_overflow */
1116 ppc64_elf_unhandled_reloc, /* special_function */
1117 "R_PPC64_GOT16_LO_DS", /* name */
1118 FALSE, /* partial_inplace */
1119 0, /* src_mask */
1120 0xfffc, /* dst_mask */
1121 FALSE), /* pcrel_offset */
1122
1123 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1124 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1125 0, /* rightshift */
1126 1, /* size (0 = byte, 1 = short, 2 = long) */
1127 16, /* bitsize */
1128 FALSE, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_dont, /* complain_on_overflow */
1131 ppc64_elf_unhandled_reloc, /* special_function */
1132 "R_PPC64_PLT16_LO_DS", /* name */
1133 FALSE, /* partial_inplace */
1134 0, /* src_mask */
1135 0xfffc, /* dst_mask */
1136 FALSE), /* pcrel_offset */
1137
1138 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1139 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1140 0, /* rightshift */
1141 1, /* size (0 = byte, 1 = short, 2 = long) */
1142 16, /* bitsize */
1143 FALSE, /* pc_relative */
1144 0, /* bitpos */
1145 complain_overflow_bitfield, /* complain_on_overflow */
1146 ppc64_elf_sectoff_reloc, /* special_function */
1147 "R_PPC64_SECTOFF_DS", /* name */
1148 FALSE, /* partial_inplace */
1149 0, /* src_mask */
1150 0xfffc, /* dst_mask */
1151 FALSE), /* pcrel_offset */
1152
1153 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1154 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1155 0, /* rightshift */
1156 1, /* size (0 = byte, 1 = short, 2 = long) */
1157 16, /* bitsize */
1158 FALSE, /* pc_relative */
1159 0, /* bitpos */
1160 complain_overflow_dont, /* complain_on_overflow */
1161 ppc64_elf_sectoff_reloc, /* special_function */
1162 "R_PPC64_SECTOFF_LO_DS",/* name */
1163 FALSE, /* partial_inplace */
1164 0, /* src_mask */
1165 0xfffc, /* dst_mask */
1166 FALSE), /* pcrel_offset */
1167
1168 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1169 HOWTO (R_PPC64_TOC16_DS, /* type */
1170 0, /* rightshift */
1171 1, /* size (0 = byte, 1 = short, 2 = long) */
1172 16, /* bitsize */
1173 FALSE, /* pc_relative */
1174 0, /* bitpos */
1175 complain_overflow_signed, /* complain_on_overflow */
1176 ppc64_elf_toc_reloc, /* special_function */
1177 "R_PPC64_TOC16_DS", /* name */
1178 FALSE, /* partial_inplace */
1179 0, /* src_mask */
1180 0xfffc, /* dst_mask */
1181 FALSE), /* pcrel_offset */
1182
1183 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1184 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1185 0, /* rightshift */
1186 1, /* size (0 = byte, 1 = short, 2 = long) */
1187 16, /* bitsize */
1188 FALSE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_dont, /* complain_on_overflow */
1191 ppc64_elf_toc_reloc, /* special_function */
1192 "R_PPC64_TOC16_LO_DS", /* name */
1193 FALSE, /* partial_inplace */
1194 0, /* src_mask */
1195 0xfffc, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1197
1198 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1199 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1200 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1201 0, /* rightshift */
1202 1, /* size (0 = byte, 1 = short, 2 = long) */
1203 16, /* bitsize */
1204 FALSE, /* pc_relative */
1205 0, /* bitpos */
1206 complain_overflow_signed, /* complain_on_overflow */
1207 ppc64_elf_unhandled_reloc, /* special_function */
1208 "R_PPC64_PLTGOT16_DS", /* name */
1209 FALSE, /* partial_inplace */
1210 0, /* src_mask */
1211 0xfffc, /* dst_mask */
1212 FALSE), /* pcrel_offset */
1213
1214 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1215 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1216 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1217 0, /* rightshift */
1218 1, /* size (0 = byte, 1 = short, 2 = long) */
1219 16, /* bitsize */
1220 FALSE, /* pc_relative */
1221 0, /* bitpos */
1222 complain_overflow_dont, /* complain_on_overflow */
1223 ppc64_elf_unhandled_reloc, /* special_function */
1224 "R_PPC64_PLTGOT16_LO_DS",/* name */
1225 FALSE, /* partial_inplace */
1226 0, /* src_mask */
1227 0xfffc, /* dst_mask */
1228 FALSE), /* pcrel_offset */
1229
1230 /* Marker reloc for TLS. */
1231 HOWTO (R_PPC64_TLS,
1232 0, /* rightshift */
1233 2, /* size (0 = byte, 1 = short, 2 = long) */
1234 32, /* bitsize */
1235 FALSE, /* pc_relative */
1236 0, /* bitpos */
1237 complain_overflow_dont, /* complain_on_overflow */
1238 bfd_elf_generic_reloc, /* special_function */
1239 "R_PPC64_TLS", /* name */
1240 FALSE, /* partial_inplace */
1241 0, /* src_mask */
1242 0, /* dst_mask */
1243 FALSE), /* pcrel_offset */
1244
1245 /* Computes the load module index of the load module that contains the
1246 definition of its TLS sym. */
1247 HOWTO (R_PPC64_DTPMOD64,
1248 0, /* rightshift */
1249 4, /* size (0 = byte, 1 = short, 2 = long) */
1250 64, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_unhandled_reloc, /* special_function */
1255 "R_PPC64_DTPMOD64", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 ONES (64), /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Computes a dtv-relative displacement, the difference between the value
1262 of sym+add and the base address of the thread-local storage block that
1263 contains the definition of sym, minus 0x8000. */
1264 HOWTO (R_PPC64_DTPREL64,
1265 0, /* rightshift */
1266 4, /* size (0 = byte, 1 = short, 2 = long) */
1267 64, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_dont, /* complain_on_overflow */
1271 ppc64_elf_unhandled_reloc, /* special_function */
1272 "R_PPC64_DTPREL64", /* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 ONES (64), /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 /* A 16 bit dtprel reloc. */
1279 HOWTO (R_PPC64_DTPREL16,
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_signed, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_DTPREL16", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Like DTPREL16, but no overflow. */
1294 HOWTO (R_PPC64_DTPREL16_LO,
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 ppc64_elf_unhandled_reloc, /* special_function */
1302 "R_PPC64_DTPREL16_LO", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1309 HOWTO (R_PPC64_DTPREL16_HI,
1310 16, /* rightshift */
1311 1, /* size (0 = byte, 1 = short, 2 = long) */
1312 16, /* bitsize */
1313 FALSE, /* pc_relative */
1314 0, /* bitpos */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 ppc64_elf_unhandled_reloc, /* special_function */
1317 "R_PPC64_DTPREL16_HI", /* name */
1318 FALSE, /* partial_inplace */
1319 0, /* src_mask */
1320 0xffff, /* dst_mask */
1321 FALSE), /* pcrel_offset */
1322
1323 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1324 HOWTO (R_PPC64_DTPREL16_HA,
1325 16, /* rightshift */
1326 1, /* size (0 = byte, 1 = short, 2 = long) */
1327 16, /* bitsize */
1328 FALSE, /* pc_relative */
1329 0, /* bitpos */
1330 complain_overflow_dont, /* complain_on_overflow */
1331 ppc64_elf_unhandled_reloc, /* special_function */
1332 "R_PPC64_DTPREL16_HA", /* name */
1333 FALSE, /* partial_inplace */
1334 0, /* src_mask */
1335 0xffff, /* dst_mask */
1336 FALSE), /* pcrel_offset */
1337
1338 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1339 HOWTO (R_PPC64_DTPREL16_HIGHER,
1340 32, /* rightshift */
1341 1, /* size (0 = byte, 1 = short, 2 = long) */
1342 16, /* bitsize */
1343 FALSE, /* pc_relative */
1344 0, /* bitpos */
1345 complain_overflow_dont, /* complain_on_overflow */
1346 ppc64_elf_unhandled_reloc, /* special_function */
1347 "R_PPC64_DTPREL16_HIGHER", /* name */
1348 FALSE, /* partial_inplace */
1349 0, /* src_mask */
1350 0xffff, /* dst_mask */
1351 FALSE), /* pcrel_offset */
1352
1353 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1354 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1355 32, /* rightshift */
1356 1, /* size (0 = byte, 1 = short, 2 = long) */
1357 16, /* bitsize */
1358 FALSE, /* pc_relative */
1359 0, /* bitpos */
1360 complain_overflow_dont, /* complain_on_overflow */
1361 ppc64_elf_unhandled_reloc, /* special_function */
1362 "R_PPC64_DTPREL16_HIGHERA", /* name */
1363 FALSE, /* partial_inplace */
1364 0, /* src_mask */
1365 0xffff, /* dst_mask */
1366 FALSE), /* pcrel_offset */
1367
1368 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1369 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1370 48, /* rightshift */
1371 1, /* size (0 = byte, 1 = short, 2 = long) */
1372 16, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL16_HIGHEST", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 0xffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1384 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1385 48, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_dont, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but for insns with a DS field. */
1399 HOWTO (R_PPC64_DTPREL16_DS,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_signed, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_DS", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xfffc, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_DS, but no overflow. */
1414 HOWTO (R_PPC64_DTPREL16_LO_DS,
1415 0, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_dont, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_LO_DS", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xfffc, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Computes a tp-relative displacement, the difference between the value of
1429 sym+add and the value of the thread pointer (r13). */
1430 HOWTO (R_PPC64_TPREL64,
1431 0, /* rightshift */
1432 4, /* size (0 = byte, 1 = short, 2 = long) */
1433 64, /* bitsize */
1434 FALSE, /* pc_relative */
1435 0, /* bitpos */
1436 complain_overflow_dont, /* complain_on_overflow */
1437 ppc64_elf_unhandled_reloc, /* special_function */
1438 "R_PPC64_TPREL64", /* name */
1439 FALSE, /* partial_inplace */
1440 0, /* src_mask */
1441 ONES (64), /* dst_mask */
1442 FALSE), /* pcrel_offset */
1443
1444 /* A 16 bit tprel reloc. */
1445 HOWTO (R_PPC64_TPREL16,
1446 0, /* rightshift */
1447 1, /* size (0 = byte, 1 = short, 2 = long) */
1448 16, /* bitsize */
1449 FALSE, /* pc_relative */
1450 0, /* bitpos */
1451 complain_overflow_signed, /* complain_on_overflow */
1452 ppc64_elf_unhandled_reloc, /* special_function */
1453 "R_PPC64_TPREL16", /* name */
1454 FALSE, /* partial_inplace */
1455 0, /* src_mask */
1456 0xffff, /* dst_mask */
1457 FALSE), /* pcrel_offset */
1458
1459 /* Like TPREL16, but no overflow. */
1460 HOWTO (R_PPC64_TPREL16_LO,
1461 0, /* rightshift */
1462 1, /* size (0 = byte, 1 = short, 2 = long) */
1463 16, /* bitsize */
1464 FALSE, /* pc_relative */
1465 0, /* bitpos */
1466 complain_overflow_dont, /* complain_on_overflow */
1467 ppc64_elf_unhandled_reloc, /* special_function */
1468 "R_PPC64_TPREL16_LO", /* name */
1469 FALSE, /* partial_inplace */
1470 0, /* src_mask */
1471 0xffff, /* dst_mask */
1472 FALSE), /* pcrel_offset */
1473
1474 /* Like TPREL16_LO, but next higher group of 16 bits. */
1475 HOWTO (R_PPC64_TPREL16_HI,
1476 16, /* rightshift */
1477 1, /* size (0 = byte, 1 = short, 2 = long) */
1478 16, /* bitsize */
1479 FALSE, /* pc_relative */
1480 0, /* bitpos */
1481 complain_overflow_dont, /* complain_on_overflow */
1482 ppc64_elf_unhandled_reloc, /* special_function */
1483 "R_PPC64_TPREL16_HI", /* name */
1484 FALSE, /* partial_inplace */
1485 0, /* src_mask */
1486 0xffff, /* dst_mask */
1487 FALSE), /* pcrel_offset */
1488
1489 /* Like TPREL16_HI, but adjust for low 16 bits. */
1490 HOWTO (R_PPC64_TPREL16_HA,
1491 16, /* rightshift */
1492 1, /* size (0 = byte, 1 = short, 2 = long) */
1493 16, /* bitsize */
1494 FALSE, /* pc_relative */
1495 0, /* bitpos */
1496 complain_overflow_dont, /* complain_on_overflow */
1497 ppc64_elf_unhandled_reloc, /* special_function */
1498 "R_PPC64_TPREL16_HA", /* name */
1499 FALSE, /* partial_inplace */
1500 0, /* src_mask */
1501 0xffff, /* dst_mask */
1502 FALSE), /* pcrel_offset */
1503
1504 /* Like TPREL16_HI, but next higher group of 16 bits. */
1505 HOWTO (R_PPC64_TPREL16_HIGHER,
1506 32, /* rightshift */
1507 1, /* size (0 = byte, 1 = short, 2 = long) */
1508 16, /* bitsize */
1509 FALSE, /* pc_relative */
1510 0, /* bitpos */
1511 complain_overflow_dont, /* complain_on_overflow */
1512 ppc64_elf_unhandled_reloc, /* special_function */
1513 "R_PPC64_TPREL16_HIGHER", /* name */
1514 FALSE, /* partial_inplace */
1515 0, /* src_mask */
1516 0xffff, /* dst_mask */
1517 FALSE), /* pcrel_offset */
1518
1519 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1520 HOWTO (R_PPC64_TPREL16_HIGHERA,
1521 32, /* rightshift */
1522 1, /* size (0 = byte, 1 = short, 2 = long) */
1523 16, /* bitsize */
1524 FALSE, /* pc_relative */
1525 0, /* bitpos */
1526 complain_overflow_dont, /* complain_on_overflow */
1527 ppc64_elf_unhandled_reloc, /* special_function */
1528 "R_PPC64_TPREL16_HIGHERA", /* name */
1529 FALSE, /* partial_inplace */
1530 0, /* src_mask */
1531 0xffff, /* dst_mask */
1532 FALSE), /* pcrel_offset */
1533
1534 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1535 HOWTO (R_PPC64_TPREL16_HIGHEST,
1536 48, /* rightshift */
1537 1, /* size (0 = byte, 1 = short, 2 = long) */
1538 16, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL16_HIGHEST", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 0xffff, /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1550 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1551 48, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_dont, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16_HIGHESTA", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but for insns with a DS field. */
1565 HOWTO (R_PPC64_TPREL16_DS,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_signed, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_DS", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xfffc, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_DS, but no overflow. */
1580 HOWTO (R_PPC64_TPREL16_LO_DS,
1581 0, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_dont, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_LO_DS", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xfffc, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1595 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1596 to the first entry relative to the TOC base (r2). */
1597 HOWTO (R_PPC64_GOT_TLSGD16,
1598 0, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_signed, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_GOT_TLSGD16", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like GOT_TLSGD16, but no overflow. */
1612 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1613 0, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_GOT_TLSGD16_LO", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1627 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1628 16, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_dont, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_GOT_TLSGD16_HI", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xffff, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1642 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1643 16, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_GOT_TLSGD16_HA", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xffff, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1657 with values (sym+add)@dtpmod and zero, and computes the offset to the
1658 first entry relative to the TOC base (r2). */
1659 HOWTO (R_PPC64_GOT_TLSLD16,
1660 0, /* rightshift */
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1662 16, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_signed, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_GOT_TLSLD16", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* Like GOT_TLSLD16, but no overflow. */
1674 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSLD16_LO", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1689 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1690 16, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 FALSE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSLD16_HI", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1702
1703 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1704 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSLD16_HA", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1719 the offset to the entry relative to the TOC base (r2). */
1720 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1721 0, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 FALSE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_signed, /* complain_on_overflow */
1727 ppc64_elf_unhandled_reloc, /* special_function */
1728 "R_PPC64_GOT_DTPREL16_DS", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xfffc, /* dst_mask */
1732 FALSE), /* pcrel_offset */
1733
1734 /* Like GOT_DTPREL16_DS, but no overflow. */
1735 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1736 0, /* rightshift */
1737 1, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 FALSE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 ppc64_elf_unhandled_reloc, /* special_function */
1743 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0xfffc, /* dst_mask */
1747 FALSE), /* pcrel_offset */
1748
1749 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1750 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1751 16, /* rightshift */
1752 1, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 ppc64_elf_unhandled_reloc, /* special_function */
1758 "R_PPC64_GOT_DTPREL16_HI", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0xffff, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1765 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1766 16, /* rightshift */
1767 1, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_dont, /* complain_on_overflow */
1772 ppc64_elf_unhandled_reloc, /* special_function */
1773 "R_PPC64_GOT_DTPREL16_HA", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0xffff, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1780 offset to the entry relative to the TOC base (r2). */
1781 HOWTO (R_PPC64_GOT_TPREL16_DS,
1782 0, /* rightshift */
1783 1, /* size (0 = byte, 1 = short, 2 = long) */
1784 16, /* bitsize */
1785 FALSE, /* pc_relative */
1786 0, /* bitpos */
1787 complain_overflow_signed, /* complain_on_overflow */
1788 ppc64_elf_unhandled_reloc, /* special_function */
1789 "R_PPC64_GOT_TPREL16_DS", /* name */
1790 FALSE, /* partial_inplace */
1791 0, /* src_mask */
1792 0xfffc, /* dst_mask */
1793 FALSE), /* pcrel_offset */
1794
1795 /* Like GOT_TPREL16_DS, but no overflow. */
1796 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1797 0, /* rightshift */
1798 1, /* size (0 = byte, 1 = short, 2 = long) */
1799 16, /* bitsize */
1800 FALSE, /* pc_relative */
1801 0, /* bitpos */
1802 complain_overflow_dont, /* complain_on_overflow */
1803 ppc64_elf_unhandled_reloc, /* special_function */
1804 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1805 FALSE, /* partial_inplace */
1806 0, /* src_mask */
1807 0xfffc, /* dst_mask */
1808 FALSE), /* pcrel_offset */
1809
1810 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1811 HOWTO (R_PPC64_GOT_TPREL16_HI,
1812 16, /* rightshift */
1813 1, /* size (0 = byte, 1 = short, 2 = long) */
1814 16, /* bitsize */
1815 FALSE, /* pc_relative */
1816 0, /* bitpos */
1817 complain_overflow_dont, /* complain_on_overflow */
1818 ppc64_elf_unhandled_reloc, /* special_function */
1819 "R_PPC64_GOT_TPREL16_HI", /* name */
1820 FALSE, /* partial_inplace */
1821 0, /* src_mask */
1822 0xffff, /* dst_mask */
1823 FALSE), /* pcrel_offset */
1824
1825 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1826 HOWTO (R_PPC64_GOT_TPREL16_HA,
1827 16, /* rightshift */
1828 1, /* size (0 = byte, 1 = short, 2 = long) */
1829 16, /* bitsize */
1830 FALSE, /* pc_relative */
1831 0, /* bitpos */
1832 complain_overflow_dont, /* complain_on_overflow */
1833 ppc64_elf_unhandled_reloc, /* special_function */
1834 "R_PPC64_GOT_TPREL16_HA", /* name */
1835 FALSE, /* partial_inplace */
1836 0, /* src_mask */
1837 0xffff, /* dst_mask */
1838 FALSE), /* pcrel_offset */
1839
1840 /* GNU extension to record C++ vtable hierarchy. */
1841 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1842 0, /* rightshift */
1843 0, /* size (0 = byte, 1 = short, 2 = long) */
1844 0, /* bitsize */
1845 FALSE, /* pc_relative */
1846 0, /* bitpos */
1847 complain_overflow_dont, /* complain_on_overflow */
1848 NULL, /* special_function */
1849 "R_PPC64_GNU_VTINHERIT", /* name */
1850 FALSE, /* partial_inplace */
1851 0, /* src_mask */
1852 0, /* dst_mask */
1853 FALSE), /* pcrel_offset */
1854
1855 /* GNU extension to record C++ vtable member usage. */
1856 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1857 0, /* rightshift */
1858 0, /* size (0 = byte, 1 = short, 2 = long) */
1859 0, /* bitsize */
1860 FALSE, /* pc_relative */
1861 0, /* bitpos */
1862 complain_overflow_dont, /* complain_on_overflow */
1863 NULL, /* special_function */
1864 "R_PPC64_GNU_VTENTRY", /* name */
1865 FALSE, /* partial_inplace */
1866 0, /* src_mask */
1867 0, /* dst_mask */
1868 FALSE), /* pcrel_offset */
1869 };
1870
1871 \f
1872 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1873 be done. */
1874
1875 static void
1876 ppc_howto_init (void)
1877 {
1878 unsigned int i, type;
1879
1880 for (i = 0;
1881 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1882 i++)
1883 {
1884 type = ppc64_elf_howto_raw[i].type;
1885 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1886 / sizeof (ppc64_elf_howto_table[0])));
1887 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1888 }
1889 }
1890
1891 static reloc_howto_type *
1892 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1893 bfd_reloc_code_real_type code)
1894 {
1895 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1896
1897 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1898 /* Initialize howto table if needed. */
1899 ppc_howto_init ();
1900
1901 switch (code)
1902 {
1903 default:
1904 return NULL;
1905
1906 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1907 break;
1908 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1909 break;
1910 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1911 break;
1912 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1913 break;
1914 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1915 break;
1916 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1917 break;
1918 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1919 break;
1920 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1921 break;
1922 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1923 break;
1924 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1925 break;
1926 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1927 break;
1928 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1929 break;
1930 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1931 break;
1932 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1933 break;
1934 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1935 break;
1936 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1937 break;
1938 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1939 break;
1940 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1941 break;
1942 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1943 break;
1944 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1945 break;
1946 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1947 break;
1948 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1949 break;
1950 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1951 break;
1952 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1953 break;
1954 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1955 break;
1956 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1957 break;
1958 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1959 break;
1960 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1961 break;
1962 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1963 break;
1964 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1965 break;
1966 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1967 break;
1968 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1969 break;
1970 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1971 break;
1972 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1973 break;
1974 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1975 break;
1976 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1977 break;
1978 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1979 break;
1980 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1981 break;
1982 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1983 break;
1984 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1985 break;
1986 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1987 break;
1988 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1989 break;
1990 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1991 break;
1992 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1993 break;
1994 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1995 break;
1996 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1997 break;
1998 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1999 break;
2000 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2001 break;
2002 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2003 break;
2004 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2005 break;
2006 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2007 break;
2008 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2009 break;
2010 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2011 break;
2012 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2013 break;
2014 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2015 break;
2016 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2017 break;
2018 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2019 break;
2020 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2021 break;
2022 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2023 break;
2024 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2025 break;
2026 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2027 break;
2028 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2029 break;
2030 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2031 break;
2032 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2033 break;
2034 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2035 break;
2036 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2037 break;
2038 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2039 break;
2040 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2041 break;
2042 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2043 break;
2044 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2045 break;
2046 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2047 break;
2048 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2049 break;
2050 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2051 break;
2052 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2053 break;
2054 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2065 break;
2066 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2067 break;
2068 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2069 break;
2070 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2071 break;
2072 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2073 break;
2074 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2075 break;
2076 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2077 break;
2078 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2079 break;
2080 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2081 break;
2082 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2083 break;
2084 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2085 break;
2086 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2087 break;
2088 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2089 break;
2090 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2091 break;
2092 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2093 break;
2094 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2095 break;
2096 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2105 break;
2106 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2107 break;
2108 }
2109
2110 return ppc64_elf_howto_table[r];
2111 };
2112
2113 /* Set the howto pointer for a PowerPC ELF reloc. */
2114
2115 static void
2116 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2117 Elf_Internal_Rela *dst)
2118 {
2119 unsigned int type;
2120
2121 /* Initialize howto table if needed. */
2122 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2123 ppc_howto_init ();
2124
2125 type = ELF64_R_TYPE (dst->r_info);
2126 if (type >= (sizeof (ppc64_elf_howto_table)
2127 / sizeof (ppc64_elf_howto_table[0])))
2128 {
2129 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2130 abfd, (int) type);
2131 type = R_PPC64_NONE;
2132 }
2133 cache_ptr->howto = ppc64_elf_howto_table[type];
2134 }
2135
2136 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2137
2138 static bfd_reloc_status_type
2139 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2140 void *data, asection *input_section,
2141 bfd *output_bfd, char **error_message)
2142 {
2143 /* If this is a relocatable link (output_bfd test tells us), just
2144 call the generic function. Any adjustment will be done at final
2145 link time. */
2146 if (output_bfd != NULL)
2147 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2148 input_section, output_bfd, error_message);
2149
2150 /* Adjust the addend for sign extension of the low 16 bits.
2151 We won't actually be using the low 16 bits, so trashing them
2152 doesn't matter. */
2153 reloc_entry->addend += 0x8000;
2154 return bfd_reloc_continue;
2155 }
2156
2157 static bfd_reloc_status_type
2158 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2159 void *data, asection *input_section,
2160 bfd *output_bfd, char **error_message)
2161 {
2162 if (output_bfd != NULL)
2163 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2164 input_section, output_bfd, error_message);
2165
2166 if (strcmp (symbol->section->name, ".opd") == 0
2167 && (symbol->section->owner->flags & DYNAMIC) == 0)
2168 {
2169 bfd_vma dest = opd_entry_value (symbol->section,
2170 symbol->value + reloc_entry->addend,
2171 NULL, NULL);
2172 if (dest != (bfd_vma) -1)
2173 reloc_entry->addend = dest - (symbol->value
2174 + symbol->section->output_section->vma
2175 + symbol->section->output_offset);
2176 }
2177 return bfd_reloc_continue;
2178 }
2179
2180 static bfd_reloc_status_type
2181 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2182 void *data, asection *input_section,
2183 bfd *output_bfd, char **error_message)
2184 {
2185 long insn;
2186 enum elf_ppc64_reloc_type r_type;
2187 bfd_size_type octets;
2188 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2189 bfd_boolean is_power4 = FALSE;
2190
2191 /* If this is a relocatable link (output_bfd test tells us), just
2192 call the generic function. Any adjustment will be done at final
2193 link time. */
2194 if (output_bfd != NULL)
2195 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2196 input_section, output_bfd, error_message);
2197
2198 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2199 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2200 insn &= ~(0x01 << 21);
2201 r_type = reloc_entry->howto->type;
2202 if (r_type == R_PPC64_ADDR14_BRTAKEN
2203 || r_type == R_PPC64_REL14_BRTAKEN)
2204 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2205
2206 if (is_power4)
2207 {
2208 /* Set 'a' bit. This is 0b00010 in BO field for branch
2209 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2210 for branch on CTR insns (BO == 1a00t or 1a01t). */
2211 if ((insn & (0x14 << 21)) == (0x04 << 21))
2212 insn |= 0x02 << 21;
2213 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2214 insn |= 0x08 << 21;
2215 else
2216 goto out;
2217 }
2218 else
2219 {
2220 bfd_vma target = 0;
2221 bfd_vma from;
2222
2223 if (!bfd_is_com_section (symbol->section))
2224 target = symbol->value;
2225 target += symbol->section->output_section->vma;
2226 target += symbol->section->output_offset;
2227 target += reloc_entry->addend;
2228
2229 from = (reloc_entry->address
2230 + input_section->output_offset
2231 + input_section->output_section->vma);
2232
2233 /* Invert 'y' bit if not the default. */
2234 if ((bfd_signed_vma) (target - from) < 0)
2235 insn ^= 0x01 << 21;
2236 }
2237 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2238 out:
2239 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2240 input_section, output_bfd, error_message);
2241 }
2242
2243 static bfd_reloc_status_type
2244 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2245 void *data, asection *input_section,
2246 bfd *output_bfd, char **error_message)
2247 {
2248 /* If this is a relocatable link (output_bfd test tells us), just
2249 call the generic function. Any adjustment will be done at final
2250 link time. */
2251 if (output_bfd != NULL)
2252 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2253 input_section, output_bfd, error_message);
2254
2255 /* Subtract the symbol section base address. */
2256 reloc_entry->addend -= symbol->section->output_section->vma;
2257 return bfd_reloc_continue;
2258 }
2259
2260 static bfd_reloc_status_type
2261 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2262 void *data, asection *input_section,
2263 bfd *output_bfd, char **error_message)
2264 {
2265 /* If this is a relocatable link (output_bfd test tells us), just
2266 call the generic function. Any adjustment will be done at final
2267 link time. */
2268 if (output_bfd != NULL)
2269 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2270 input_section, output_bfd, error_message);
2271
2272 /* Subtract the symbol section base address. */
2273 reloc_entry->addend -= symbol->section->output_section->vma;
2274
2275 /* Adjust the addend for sign extension of the low 16 bits. */
2276 reloc_entry->addend += 0x8000;
2277 return bfd_reloc_continue;
2278 }
2279
2280 static bfd_reloc_status_type
2281 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2282 void *data, asection *input_section,
2283 bfd *output_bfd, char **error_message)
2284 {
2285 bfd_vma TOCstart;
2286
2287 /* If this is a relocatable link (output_bfd test tells us), just
2288 call the generic function. Any adjustment will be done at final
2289 link time. */
2290 if (output_bfd != NULL)
2291 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2292 input_section, output_bfd, error_message);
2293
2294 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2295 if (TOCstart == 0)
2296 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2297
2298 /* Subtract the TOC base address. */
2299 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2300 return bfd_reloc_continue;
2301 }
2302
2303 static bfd_reloc_status_type
2304 ppc64_elf_toc_ha_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
2324 /* Adjust the addend for sign extension of the low 16 bits. */
2325 reloc_entry->addend += 0x8000;
2326 return bfd_reloc_continue;
2327 }
2328
2329 static bfd_reloc_status_type
2330 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2331 void *data, asection *input_section,
2332 bfd *output_bfd, char **error_message)
2333 {
2334 bfd_vma TOCstart;
2335 bfd_size_type octets;
2336
2337 /* If this is a relocatable link (output_bfd test tells us), just
2338 call the generic function. Any adjustment will be done at final
2339 link time. */
2340 if (output_bfd != NULL)
2341 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2342 input_section, output_bfd, error_message);
2343
2344 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2345 if (TOCstart == 0)
2346 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2347
2348 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2349 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2350 return bfd_reloc_ok;
2351 }
2352
2353 static bfd_reloc_status_type
2354 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2355 void *data, asection *input_section,
2356 bfd *output_bfd, char **error_message)
2357 {
2358 /* If this is a relocatable link (output_bfd test tells us), just
2359 call the generic function. Any adjustment will be done at final
2360 link time. */
2361 if (output_bfd != NULL)
2362 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2363 input_section, output_bfd, error_message);
2364
2365 if (error_message != NULL)
2366 {
2367 static char buf[60];
2368 sprintf (buf, "generic linker can't handle %s",
2369 reloc_entry->howto->name);
2370 *error_message = buf;
2371 }
2372 return bfd_reloc_dangerous;
2373 }
2374
2375 struct ppc64_elf_obj_tdata
2376 {
2377 struct elf_obj_tdata elf;
2378
2379 /* Shortcuts to dynamic linker sections. */
2380 asection *got;
2381 asection *relgot;
2382
2383 /* Used during garbage collection. We attach global symbols defined
2384 on removed .opd entries to this section so that the sym is removed. */
2385 asection *deleted_section;
2386
2387 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2388 sections means we potentially need one of these for each input bfd. */
2389 union {
2390 bfd_signed_vma refcount;
2391 bfd_vma offset;
2392 } tlsld_got;
2393
2394 /* A copy of relocs before they are modified for --emit-relocs. */
2395 Elf_Internal_Rela *opd_relocs;
2396 };
2397
2398 #define ppc64_elf_tdata(bfd) \
2399 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2400
2401 #define ppc64_tlsld_got(bfd) \
2402 (&ppc64_elf_tdata (bfd)->tlsld_got)
2403
2404 /* Override the generic function because we store some extras. */
2405
2406 static bfd_boolean
2407 ppc64_elf_mkobject (bfd *abfd)
2408 {
2409 if (abfd->tdata.any == NULL)
2410 {
2411 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2412 abfd->tdata.any = bfd_zalloc (abfd, amt);
2413 if (abfd->tdata.any == NULL)
2414 return FALSE;
2415 }
2416 return bfd_elf_mkobject (abfd);
2417 }
2418
2419 /* Return 1 if target is one of ours. */
2420
2421 static bfd_boolean
2422 is_ppc64_elf_target (const struct bfd_target *targ)
2423 {
2424 extern const bfd_target bfd_elf64_powerpc_vec;
2425 extern const bfd_target bfd_elf64_powerpcle_vec;
2426
2427 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2428 }
2429
2430 /* Fix bad default arch selected for a 64 bit input bfd when the
2431 default is 32 bit. */
2432
2433 static bfd_boolean
2434 ppc64_elf_object_p (bfd *abfd)
2435 {
2436 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2437 {
2438 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2439
2440 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2441 {
2442 /* Relies on arch after 32 bit default being 64 bit default. */
2443 abfd->arch_info = abfd->arch_info->next;
2444 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2445 }
2446 }
2447 return TRUE;
2448 }
2449
2450 /* Support for core dump NOTE sections. */
2451
2452 static bfd_boolean
2453 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2454 {
2455 size_t offset, size;
2456
2457 if (note->descsz != 504)
2458 return FALSE;
2459
2460 /* pr_cursig */
2461 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2462
2463 /* pr_pid */
2464 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2465
2466 /* pr_reg */
2467 offset = 112;
2468 size = 384;
2469
2470 /* Make a ".reg/999" section. */
2471 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2472 size, note->descpos + offset);
2473 }
2474
2475 static bfd_boolean
2476 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2477 {
2478 if (note->descsz != 136)
2479 return FALSE;
2480
2481 elf_tdata (abfd)->core_program
2482 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2483 elf_tdata (abfd)->core_command
2484 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2485
2486 return TRUE;
2487 }
2488
2489 static char *
2490 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2491 ...)
2492 {
2493 switch (note_type)
2494 {
2495 default:
2496 return NULL;
2497
2498 case NT_PRPSINFO:
2499 {
2500 char data[136];
2501 va_list ap;
2502
2503 va_start (ap, note_type);
2504 memset (data, 0, 40);
2505 strncpy (data + 40, va_arg (ap, const char *), 16);
2506 strncpy (data + 56, va_arg (ap, const char *), 80);
2507 va_end (ap);
2508 return elfcore_write_note (abfd, buf, bufsiz,
2509 "CORE", note_type, data, sizeof (data));
2510 }
2511
2512 case NT_PRSTATUS:
2513 {
2514 char data[504];
2515 va_list ap;
2516 long pid;
2517 int cursig;
2518 const void *greg;
2519
2520 va_start (ap, note_type);
2521 memset (data, 0, 112);
2522 pid = va_arg (ap, long);
2523 bfd_put_32 (abfd, pid, data + 32);
2524 cursig = va_arg (ap, int);
2525 bfd_put_16 (abfd, cursig, data + 12);
2526 greg = va_arg (ap, const void *);
2527 memcpy (data + 112, greg, 384);
2528 memset (data + 496, 0, 8);
2529 va_end (ap);
2530 return elfcore_write_note (abfd, buf, bufsiz,
2531 "CORE", note_type, data, sizeof (data));
2532 }
2533 }
2534 }
2535
2536 /* Merge backend specific data from an object file to the output
2537 object file when linking. */
2538
2539 static bfd_boolean
2540 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2541 {
2542 /* Check if we have the same endianess. */
2543 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2544 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2545 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2546 {
2547 const char *msg;
2548
2549 if (bfd_big_endian (ibfd))
2550 msg = _("%B: compiled for a big endian system "
2551 "and target is little endian");
2552 else
2553 msg = _("%B: compiled for a little endian system "
2554 "and target is big endian");
2555
2556 (*_bfd_error_handler) (msg, ibfd);
2557
2558 bfd_set_error (bfd_error_wrong_format);
2559 return FALSE;
2560 }
2561
2562 return TRUE;
2563 }
2564
2565 /* Add extra PPC sections. */
2566
2567 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2568 {
2569 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2570 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2571 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2572 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2573 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2574 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2575 { NULL, 0, 0, 0, 0 }
2576 };
2577
2578 enum _ppc64_sec_type {
2579 sec_normal = 0,
2580 sec_opd = 1,
2581 sec_toc = 2
2582 };
2583
2584 struct _ppc64_elf_section_data
2585 {
2586 struct bfd_elf_section_data elf;
2587
2588 /* An array with one entry for each opd function descriptor. */
2589 union
2590 {
2591 /* Points to the function code section for local opd entries. */
2592 asection **opd_func_sec;
2593 /* After editing .opd, adjust references to opd local syms. */
2594 long *opd_adjust;
2595
2596 /* An array for toc sections, indexed by offset/8.
2597 Specifies the relocation symbol index used at a given toc offset. */
2598 unsigned *t_symndx;
2599 } u;
2600
2601 enum _ppc64_sec_type sec_type:2;
2602
2603 /* Flag set when small branches are detected. Used to
2604 select suitable defaults for the stub group size. */
2605 unsigned int has_14bit_branch:1;
2606 };
2607
2608 #define ppc64_elf_section_data(sec) \
2609 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2610
2611 static bfd_boolean
2612 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2613 {
2614 if (!sec->used_by_bfd)
2615 {
2616 struct _ppc64_elf_section_data *sdata;
2617 bfd_size_type amt = sizeof (*sdata);
2618
2619 sdata = bfd_zalloc (abfd, amt);
2620 if (sdata == NULL)
2621 return FALSE;
2622 sec->used_by_bfd = sdata;
2623 }
2624
2625 return _bfd_elf_new_section_hook (abfd, sec);
2626 }
2627
2628 static void *
2629 get_opd_info (asection * sec)
2630 {
2631 if (sec != NULL
2632 && ppc64_elf_section_data (sec) != NULL
2633 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2634 return ppc64_elf_section_data (sec)->u.opd_adjust;
2635 return NULL;
2636 }
2637 \f
2638 /* Parameters for the qsort hook. */
2639 static asection *synthetic_opd;
2640 static bfd_boolean synthetic_relocatable;
2641
2642 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2643
2644 static int
2645 compare_symbols (const void *ap, const void *bp)
2646 {
2647 const asymbol *a = * (const asymbol **) ap;
2648 const asymbol *b = * (const asymbol **) bp;
2649
2650 /* Section symbols first. */
2651 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2652 return -1;
2653 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2654 return 1;
2655
2656 /* then .opd symbols. */
2657 if (a->section == synthetic_opd && b->section != synthetic_opd)
2658 return -1;
2659 if (a->section != synthetic_opd && b->section == synthetic_opd)
2660 return 1;
2661
2662 /* then other code symbols. */
2663 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2664 == (SEC_CODE | SEC_ALLOC)
2665 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2666 != (SEC_CODE | SEC_ALLOC))
2667 return -1;
2668
2669 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2670 != (SEC_CODE | SEC_ALLOC)
2671 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2672 == (SEC_CODE | SEC_ALLOC))
2673 return 1;
2674
2675 if (synthetic_relocatable)
2676 {
2677 if (a->section->id < b->section->id)
2678 return -1;
2679
2680 if (a->section->id > b->section->id)
2681 return 1;
2682 }
2683
2684 if (a->value + a->section->vma < b->value + b->section->vma)
2685 return -1;
2686
2687 if (a->value + a->section->vma > b->value + b->section->vma)
2688 return 1;
2689
2690 /* For syms with the same value, prefer strong dynamic global function
2691 syms over other syms. */
2692 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2693 return -1;
2694
2695 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2696 return 1;
2697
2698 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2699 return -1;
2700
2701 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2702 return 1;
2703
2704 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2705 return -1;
2706
2707 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2708 return 1;
2709
2710 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2711 return -1;
2712
2713 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2714 return 1;
2715
2716 return 0;
2717 }
2718
2719 /* Search SYMS for a symbol of the given VALUE. */
2720
2721 static asymbol *
2722 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2723 {
2724 long mid;
2725
2726 if (id == -1)
2727 {
2728 while (lo < hi)
2729 {
2730 mid = (lo + hi) >> 1;
2731 if (syms[mid]->value + syms[mid]->section->vma < value)
2732 lo = mid + 1;
2733 else if (syms[mid]->value + syms[mid]->section->vma > value)
2734 hi = mid;
2735 else
2736 return syms[mid];
2737 }
2738 }
2739 else
2740 {
2741 while (lo < hi)
2742 {
2743 mid = (lo + hi) >> 1;
2744 if (syms[mid]->section->id < id)
2745 lo = mid + 1;
2746 else if (syms[mid]->section->id > id)
2747 hi = mid;
2748 else if (syms[mid]->value < value)
2749 lo = mid + 1;
2750 else if (syms[mid]->value > value)
2751 hi = mid;
2752 else
2753 return syms[mid];
2754 }
2755 }
2756 return NULL;
2757 }
2758
2759 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2760 entry syms. */
2761
2762 static long
2763 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2764 long static_count, asymbol **static_syms,
2765 long dyn_count, asymbol **dyn_syms,
2766 asymbol **ret)
2767 {
2768 asymbol *s;
2769 long i;
2770 long count;
2771 char *names;
2772 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2773 asection *opd;
2774 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2775 asymbol **syms;
2776
2777 *ret = NULL;
2778
2779 opd = bfd_get_section_by_name (abfd, ".opd");
2780 if (opd == NULL)
2781 return 0;
2782
2783 symcount = static_count;
2784 if (!relocatable)
2785 symcount += dyn_count;
2786 if (symcount == 0)
2787 return 0;
2788
2789 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2790 if (syms == NULL)
2791 return -1;
2792
2793 if (!relocatable && static_count != 0 && dyn_count != 0)
2794 {
2795 /* Use both symbol tables. */
2796 memcpy (syms, static_syms, static_count * sizeof (*syms));
2797 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2798 }
2799 else if (!relocatable && static_count == 0)
2800 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2801 else
2802 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2803
2804 synthetic_opd = opd;
2805 synthetic_relocatable = relocatable;
2806 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2807
2808 if (!relocatable && symcount > 1)
2809 {
2810 long j;
2811 /* Trim duplicate syms, since we may have merged the normal and
2812 dynamic symbols. Actually, we only care about syms that have
2813 different values, so trim any with the same value. */
2814 for (i = 1, j = 1; i < symcount; ++i)
2815 if (syms[i - 1]->value + syms[i - 1]->section->vma
2816 != syms[i]->value + syms[i]->section->vma)
2817 syms[j++] = syms[i];
2818 symcount = j;
2819 }
2820
2821 i = 0;
2822 if (syms[i]->section == opd)
2823 ++i;
2824 codesecsym = i;
2825
2826 for (; i < symcount; ++i)
2827 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2828 != (SEC_CODE | SEC_ALLOC))
2829 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2830 break;
2831 codesecsymend = i;
2832
2833 for (; i < symcount; ++i)
2834 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2835 break;
2836 secsymend = i;
2837
2838 for (; i < symcount; ++i)
2839 if (syms[i]->section != opd)
2840 break;
2841 opdsymend = i;
2842
2843 for (; i < symcount; ++i)
2844 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2845 != (SEC_CODE | SEC_ALLOC))
2846 break;
2847 symcount = i;
2848
2849 count = 0;
2850 if (opdsymend == secsymend)
2851 goto done;
2852
2853 if (relocatable)
2854 {
2855 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2856 arelent *r;
2857 size_t size;
2858 long relcount;
2859
2860 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2861 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2862 if (relcount == 0)
2863 goto done;
2864
2865 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2866 {
2867 count = -1;
2868 goto done;
2869 }
2870
2871 size = 0;
2872 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2873 {
2874 asymbol *sym;
2875
2876 while (r < opd->relocation + relcount
2877 && r->address < syms[i]->value + opd->vma)
2878 ++r;
2879
2880 if (r == opd->relocation + relcount)
2881 break;
2882
2883 if (r->address != syms[i]->value + opd->vma)
2884 continue;
2885
2886 if (r->howto->type != R_PPC64_ADDR64)
2887 continue;
2888
2889 sym = *r->sym_ptr_ptr;
2890 if (!sym_exists_at (syms, opdsymend, symcount,
2891 sym->section->id, sym->value + r->addend))
2892 {
2893 ++count;
2894 size += sizeof (asymbol);
2895 size += strlen (syms[i]->name) + 2;
2896 }
2897 }
2898
2899 s = *ret = bfd_malloc (size);
2900 if (s == NULL)
2901 {
2902 count = -1;
2903 goto done;
2904 }
2905
2906 names = (char *) (s + count);
2907
2908 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2909 {
2910 asymbol *sym;
2911
2912 while (r < opd->relocation + relcount
2913 && r->address < syms[i]->value + opd->vma)
2914 ++r;
2915
2916 if (r == opd->relocation + relcount)
2917 break;
2918
2919 if (r->address != syms[i]->value + opd->vma)
2920 continue;
2921
2922 if (r->howto->type != R_PPC64_ADDR64)
2923 continue;
2924
2925 sym = *r->sym_ptr_ptr;
2926 if (!sym_exists_at (syms, opdsymend, symcount,
2927 sym->section->id, sym->value + r->addend))
2928 {
2929 size_t len;
2930
2931 *s = *syms[i];
2932 s->section = sym->section;
2933 s->value = sym->value + r->addend;
2934 s->name = names;
2935 *names++ = '.';
2936 len = strlen (syms[i]->name);
2937 memcpy (names, syms[i]->name, len + 1);
2938 names += len + 1;
2939 s++;
2940 }
2941 }
2942 }
2943 else
2944 {
2945 bfd_byte *contents;
2946 size_t size;
2947
2948 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2949 {
2950 if (contents)
2951 {
2952 free_contents_and_exit:
2953 free (contents);
2954 }
2955 count = -1;
2956 goto done;
2957 }
2958
2959 size = 0;
2960 for (i = secsymend; i < opdsymend; ++i)
2961 {
2962 bfd_vma ent;
2963
2964 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2965 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2966 {
2967 ++count;
2968 size += sizeof (asymbol);
2969 size += strlen (syms[i]->name) + 2;
2970 }
2971 }
2972
2973 s = *ret = bfd_malloc (size);
2974 if (s == NULL)
2975 goto free_contents_and_exit;
2976
2977 names = (char *) (s + count);
2978
2979 for (i = secsymend; i < opdsymend; ++i)
2980 {
2981 bfd_vma ent;
2982
2983 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2984 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2985 {
2986 long lo, hi;
2987 size_t len;
2988 asection *sec = abfd->sections;
2989
2990 *s = *syms[i];
2991 lo = codesecsym;
2992 hi = codesecsymend;
2993 while (lo < hi)
2994 {
2995 long mid = (lo + hi) >> 1;
2996 if (syms[mid]->section->vma < ent)
2997 lo = mid + 1;
2998 else if (syms[mid]->section->vma > ent)
2999 hi = mid;
3000 else
3001 {
3002 sec = syms[mid]->section;
3003 break;
3004 }
3005 }
3006
3007 if (lo >= hi && lo > codesecsym)
3008 sec = syms[lo - 1]->section;
3009
3010 for (; sec != NULL; sec = sec->next)
3011 {
3012 if (sec->vma > ent)
3013 break;
3014 if ((sec->flags & SEC_ALLOC) == 0
3015 || (sec->flags & SEC_LOAD) == 0)
3016 break;
3017 if ((sec->flags & SEC_CODE) != 0)
3018 s->section = sec;
3019 }
3020 s->value = ent - s->section->vma;
3021 s->name = names;
3022 *names++ = '.';
3023 len = strlen (syms[i]->name);
3024 memcpy (names, syms[i]->name, len + 1);
3025 names += len + 1;
3026 s++;
3027 }
3028 }
3029 free (contents);
3030 }
3031
3032 done:
3033 free (syms);
3034 return count;
3035 }
3036 \f
3037 /* The following functions are specific to the ELF linker, while
3038 functions above are used generally. Those named ppc64_elf_* are
3039 called by the main ELF linker code. They appear in this file more
3040 or less in the order in which they are called. eg.
3041 ppc64_elf_check_relocs is called early in the link process,
3042 ppc64_elf_finish_dynamic_sections is one of the last functions
3043 called.
3044
3045 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3046 functions have both a function code symbol and a function descriptor
3047 symbol. A call to foo in a relocatable object file looks like:
3048
3049 . .text
3050 . x:
3051 . bl .foo
3052 . nop
3053
3054 The function definition in another object file might be:
3055
3056 . .section .opd
3057 . foo: .quad .foo
3058 . .quad .TOC.@tocbase
3059 . .quad 0
3060 .
3061 . .text
3062 . .foo: blr
3063
3064 When the linker resolves the call during a static link, the branch
3065 unsurprisingly just goes to .foo and the .opd information is unused.
3066 If the function definition is in a shared library, things are a little
3067 different: The call goes via a plt call stub, the opd information gets
3068 copied to the plt, and the linker patches the nop.
3069
3070 . x:
3071 . bl .foo_stub
3072 . ld 2,40(1)
3073 .
3074 .
3075 . .foo_stub:
3076 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3077 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3078 . std 2,40(1) # this is the general idea
3079 . ld 11,0(12)
3080 . ld 2,8(12)
3081 . mtctr 11
3082 . ld 11,16(12)
3083 . bctr
3084 .
3085 . .section .plt
3086 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3087
3088 The "reloc ()" notation is supposed to indicate that the linker emits
3089 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3090 copying.
3091
3092 What are the difficulties here? Well, firstly, the relocations
3093 examined by the linker in check_relocs are against the function code
3094 sym .foo, while the dynamic relocation in the plt is emitted against
3095 the function descriptor symbol, foo. Somewhere along the line, we need
3096 to carefully copy dynamic link information from one symbol to the other.
3097 Secondly, the generic part of the elf linker will make .foo a dynamic
3098 symbol as is normal for most other backends. We need foo dynamic
3099 instead, at least for an application final link. However, when
3100 creating a shared library containing foo, we need to have both symbols
3101 dynamic so that references to .foo are satisfied during the early
3102 stages of linking. Otherwise the linker might decide to pull in a
3103 definition from some other object, eg. a static library.
3104
3105 Update: As of August 2004, we support a new convention. Function
3106 calls may use the function descriptor symbol, ie. "bl foo". This
3107 behaves exactly as "bl .foo". */
3108
3109 /* The linker needs to keep track of the number of relocs that it
3110 decides to copy as dynamic relocs in check_relocs for each symbol.
3111 This is so that it can later discard them if they are found to be
3112 unnecessary. We store the information in a field extending the
3113 regular ELF linker hash table. */
3114
3115 struct ppc_dyn_relocs
3116 {
3117 struct ppc_dyn_relocs *next;
3118
3119 /* The input section of the reloc. */
3120 asection *sec;
3121
3122 /* Total number of relocs copied for the input section. */
3123 bfd_size_type count;
3124
3125 /* Number of pc-relative relocs copied for the input section. */
3126 bfd_size_type pc_count;
3127 };
3128
3129 /* Track GOT entries needed for a given symbol. We might need more
3130 than one got entry per symbol. */
3131 struct got_entry
3132 {
3133 struct got_entry *next;
3134
3135 /* The symbol addend that we'll be placing in the GOT. */
3136 bfd_vma addend;
3137
3138 /* Unlike other ELF targets, we use separate GOT entries for the same
3139 symbol referenced from different input files. This is to support
3140 automatic multiple TOC/GOT sections, where the TOC base can vary
3141 from one input file to another.
3142
3143 Point to the BFD owning this GOT entry. */
3144 bfd *owner;
3145
3146 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3147 TLS_TPREL or TLS_DTPREL for tls entries. */
3148 char tls_type;
3149
3150 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3151 union
3152 {
3153 bfd_signed_vma refcount;
3154 bfd_vma offset;
3155 } got;
3156 };
3157
3158 /* The same for PLT. */
3159 struct plt_entry
3160 {
3161 struct plt_entry *next;
3162
3163 bfd_vma addend;
3164
3165 union
3166 {
3167 bfd_signed_vma refcount;
3168 bfd_vma offset;
3169 } plt;
3170 };
3171
3172 /* Of those relocs that might be copied as dynamic relocs, this macro
3173 selects those that must be copied when linking a shared library,
3174 even when the symbol is local. */
3175
3176 #define MUST_BE_DYN_RELOC(RTYPE) \
3177 ((RTYPE) != R_PPC64_REL32 \
3178 && (RTYPE) != R_PPC64_REL64 \
3179 && (RTYPE) != R_PPC64_REL30)
3180
3181 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3182 copying dynamic variables from a shared lib into an app's dynbss
3183 section, and instead use a dynamic relocation to point into the
3184 shared lib. With code that gcc generates, it's vital that this be
3185 enabled; In the PowerPC64 ABI, the address of a function is actually
3186 the address of a function descriptor, which resides in the .opd
3187 section. gcc uses the descriptor directly rather than going via the
3188 GOT as some other ABI's do, which means that initialized function
3189 pointers must reference the descriptor. Thus, a function pointer
3190 initialized to the address of a function in a shared library will
3191 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3192 redefines the function descriptor symbol to point to the copy. This
3193 presents a problem as a plt entry for that function is also
3194 initialized from the function descriptor symbol and the copy reloc
3195 may not be initialized first. */
3196 #define ELIMINATE_COPY_RELOCS 1
3197
3198 /* Section name for stubs is the associated section name plus this
3199 string. */
3200 #define STUB_SUFFIX ".stub"
3201
3202 /* Linker stubs.
3203 ppc_stub_long_branch:
3204 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3205 destination, but a 24 bit branch in a stub section will reach.
3206 . b dest
3207
3208 ppc_stub_plt_branch:
3209 Similar to the above, but a 24 bit branch in the stub section won't
3210 reach its destination.
3211 . addis %r12,%r2,xxx@toc@ha
3212 . ld %r11,xxx@toc@l(%r12)
3213 . mtctr %r11
3214 . bctr
3215
3216 ppc_stub_plt_call:
3217 Used to call a function in a shared library. If it so happens that
3218 the plt entry referenced crosses a 64k boundary, then an extra
3219 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3220 xxx+16 as appropriate.
3221 . addis %r12,%r2,xxx@toc@ha
3222 . std %r2,40(%r1)
3223 . ld %r11,xxx+0@toc@l(%r12)
3224 . ld %r2,xxx+8@toc@l(%r12)
3225 . mtctr %r11
3226 . ld %r11,xxx+16@toc@l(%r12)
3227 . bctr
3228
3229 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3230 code to adjust the value and save r2 to support multiple toc sections.
3231 A ppc_stub_long_branch with an r2 offset looks like:
3232 . std %r2,40(%r1)
3233 . addis %r2,%r2,off@ha
3234 . addi %r2,%r2,off@l
3235 . b dest
3236
3237 A ppc_stub_plt_branch with an r2 offset looks like:
3238 . std %r2,40(%r1)
3239 . addis %r12,%r2,xxx@toc@ha
3240 . ld %r11,xxx@toc@l(%r12)
3241 . addis %r2,%r2,off@ha
3242 . addi %r2,%r2,off@l
3243 . mtctr %r11
3244 . bctr
3245 */
3246
3247 enum ppc_stub_type {
3248 ppc_stub_none,
3249 ppc_stub_long_branch,
3250 ppc_stub_long_branch_r2off,
3251 ppc_stub_plt_branch,
3252 ppc_stub_plt_branch_r2off,
3253 ppc_stub_plt_call
3254 };
3255
3256 struct ppc_stub_hash_entry {
3257
3258 /* Base hash table entry structure. */
3259 struct bfd_hash_entry root;
3260
3261 enum ppc_stub_type stub_type;
3262
3263 /* The stub section. */
3264 asection *stub_sec;
3265
3266 /* Offset within stub_sec of the beginning of this stub. */
3267 bfd_vma stub_offset;
3268
3269 /* Given the symbol's value and its section we can determine its final
3270 value when building the stubs (so the stub knows where to jump. */
3271 bfd_vma target_value;
3272 asection *target_section;
3273
3274 /* The symbol table entry, if any, that this was derived from. */
3275 struct ppc_link_hash_entry *h;
3276
3277 /* And the reloc addend that this was derived from. */
3278 bfd_vma addend;
3279
3280 /* Where this stub is being called from, or, in the case of combined
3281 stub sections, the first input section in the group. */
3282 asection *id_sec;
3283 };
3284
3285 struct ppc_branch_hash_entry {
3286
3287 /* Base hash table entry structure. */
3288 struct bfd_hash_entry root;
3289
3290 /* Offset within branch lookup table. */
3291 unsigned int offset;
3292
3293 /* Generation marker. */
3294 unsigned int iter;
3295 };
3296
3297 struct ppc_link_hash_entry
3298 {
3299 struct elf_link_hash_entry elf;
3300
3301 union {
3302 /* A pointer to the most recently used stub hash entry against this
3303 symbol. */
3304 struct ppc_stub_hash_entry *stub_cache;
3305
3306 /* A pointer to the next symbol starting with a '.' */
3307 struct ppc_link_hash_entry *next_dot_sym;
3308 } u;
3309
3310 /* Track dynamic relocs copied for this symbol. */
3311 struct ppc_dyn_relocs *dyn_relocs;
3312
3313 /* Link between function code and descriptor symbols. */
3314 struct ppc_link_hash_entry *oh;
3315
3316 /* Flag function code and descriptor symbols. */
3317 unsigned int is_func:1;
3318 unsigned int is_func_descriptor:1;
3319 unsigned int fake:1;
3320
3321 /* Whether global opd/toc sym has been adjusted or not.
3322 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3323 should be set for all globals defined in any opd/toc section. */
3324 unsigned int adjust_done:1;
3325
3326 /* Set if we twiddled this symbol to weak at some stage. */
3327 unsigned int was_undefined:1;
3328
3329 /* Contexts in which symbol is used in the GOT (or TOC).
3330 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3331 corresponding relocs are encountered during check_relocs.
3332 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3333 indicate the corresponding GOT entry type is not needed.
3334 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3335 a TPREL one. We use a separate flag rather than setting TPREL
3336 just for convenience in distinguishing the two cases. */
3337 #define TLS_GD 1 /* GD reloc. */
3338 #define TLS_LD 2 /* LD reloc. */
3339 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3340 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3341 #define TLS_TLS 16 /* Any TLS reloc. */
3342 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3343 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3344 char tls_mask;
3345 };
3346
3347 /* ppc64 ELF linker hash table. */
3348
3349 struct ppc_link_hash_table
3350 {
3351 struct elf_link_hash_table elf;
3352
3353 /* The stub hash table. */
3354 struct bfd_hash_table stub_hash_table;
3355
3356 /* Another hash table for plt_branch stubs. */
3357 struct bfd_hash_table branch_hash_table;
3358
3359 /* Linker stub bfd. */
3360 bfd *stub_bfd;
3361
3362 /* Linker call-backs. */
3363 asection * (*add_stub_section) (const char *, asection *);
3364 void (*layout_sections_again) (void);
3365
3366 /* Array to keep track of which stub sections have been created, and
3367 information on stub grouping. */
3368 struct map_stub {
3369 /* This is the section to which stubs in the group will be attached. */
3370 asection *link_sec;
3371 /* The stub section. */
3372 asection *stub_sec;
3373 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3374 bfd_vma toc_off;
3375 } *stub_group;
3376
3377 /* Temp used when calculating TOC pointers. */
3378 bfd_vma toc_curr;
3379
3380 /* Highest input section id. */
3381 int top_id;
3382
3383 /* Highest output section index. */
3384 int top_index;
3385
3386 /* Used when adding symbols. */
3387 struct ppc_link_hash_entry *dot_syms;
3388
3389 /* List of input sections for each output section. */
3390 asection **input_list;
3391
3392 /* Short-cuts to get to dynamic linker sections. */
3393 asection *got;
3394 asection *plt;
3395 asection *relplt;
3396 asection *dynbss;
3397 asection *relbss;
3398 asection *glink;
3399 asection *sfpr;
3400 asection *brlt;
3401 asection *relbrlt;
3402
3403 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3404 struct ppc_link_hash_entry *tls_get_addr;
3405 struct ppc_link_hash_entry *tls_get_addr_fd;
3406
3407 /* Statistics. */
3408 unsigned long stub_count[ppc_stub_plt_call];
3409
3410 /* Number of stubs against global syms. */
3411 unsigned long stub_globals;
3412
3413 /* Set if we should emit symbols for stubs. */
3414 unsigned int emit_stub_syms:1;
3415
3416 /* Support for multiple toc sections. */
3417 unsigned int no_multi_toc:1;
3418 unsigned int multi_toc_needed:1;
3419
3420 /* Set on error. */
3421 unsigned int stub_error:1;
3422
3423 /* Temp used by ppc64_elf_check_directives. */
3424 unsigned int twiddled_syms:1;
3425
3426 /* Incremented every time we size stubs. */
3427 unsigned int stub_iteration;
3428
3429 /* Small local sym to section mapping cache. */
3430 struct sym_sec_cache sym_sec;
3431 };
3432
3433 /* Rename some of the generic section flags to better document how they
3434 are used here. */
3435 #define has_toc_reloc has_gp_reloc
3436 #define makes_toc_func_call need_finalize_relax
3437 #define call_check_in_progress reloc_done
3438
3439 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3440
3441 #define ppc_hash_table(p) \
3442 ((struct ppc_link_hash_table *) ((p)->hash))
3443
3444 #define ppc_stub_hash_lookup(table, string, create, copy) \
3445 ((struct ppc_stub_hash_entry *) \
3446 bfd_hash_lookup ((table), (string), (create), (copy)))
3447
3448 #define ppc_branch_hash_lookup(table, string, create, copy) \
3449 ((struct ppc_branch_hash_entry *) \
3450 bfd_hash_lookup ((table), (string), (create), (copy)))
3451
3452 /* Create an entry in the stub hash table. */
3453
3454 static struct bfd_hash_entry *
3455 stub_hash_newfunc (struct bfd_hash_entry *entry,
3456 struct bfd_hash_table *table,
3457 const char *string)
3458 {
3459 /* Allocate the structure if it has not already been allocated by a
3460 subclass. */
3461 if (entry == NULL)
3462 {
3463 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3464 if (entry == NULL)
3465 return entry;
3466 }
3467
3468 /* Call the allocation method of the superclass. */
3469 entry = bfd_hash_newfunc (entry, table, string);
3470 if (entry != NULL)
3471 {
3472 struct ppc_stub_hash_entry *eh;
3473
3474 /* Initialize the local fields. */
3475 eh = (struct ppc_stub_hash_entry *) entry;
3476 eh->stub_type = ppc_stub_none;
3477 eh->stub_sec = NULL;
3478 eh->stub_offset = 0;
3479 eh->target_value = 0;
3480 eh->target_section = NULL;
3481 eh->h = NULL;
3482 eh->id_sec = NULL;
3483 }
3484
3485 return entry;
3486 }
3487
3488 /* Create an entry in the branch hash table. */
3489
3490 static struct bfd_hash_entry *
3491 branch_hash_newfunc (struct bfd_hash_entry *entry,
3492 struct bfd_hash_table *table,
3493 const char *string)
3494 {
3495 /* Allocate the structure if it has not already been allocated by a
3496 subclass. */
3497 if (entry == NULL)
3498 {
3499 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3500 if (entry == NULL)
3501 return entry;
3502 }
3503
3504 /* Call the allocation method of the superclass. */
3505 entry = bfd_hash_newfunc (entry, table, string);
3506 if (entry != NULL)
3507 {
3508 struct ppc_branch_hash_entry *eh;
3509
3510 /* Initialize the local fields. */
3511 eh = (struct ppc_branch_hash_entry *) entry;
3512 eh->offset = 0;
3513 eh->iter = 0;
3514 }
3515
3516 return entry;
3517 }
3518
3519 /* Create an entry in a ppc64 ELF linker hash table. */
3520
3521 static struct bfd_hash_entry *
3522 link_hash_newfunc (struct bfd_hash_entry *entry,
3523 struct bfd_hash_table *table,
3524 const char *string)
3525 {
3526 /* Allocate the structure if it has not already been allocated by a
3527 subclass. */
3528 if (entry == NULL)
3529 {
3530 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3531 if (entry == NULL)
3532 return entry;
3533 }
3534
3535 /* Call the allocation method of the superclass. */
3536 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3537 if (entry != NULL)
3538 {
3539 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3540
3541 memset (&eh->u.stub_cache, 0,
3542 (sizeof (struct ppc_link_hash_entry)
3543 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3544
3545 /* When making function calls, old ABI code references function entry
3546 points (dot symbols), while new ABI code references the function
3547 descriptor symbol. We need to make any combination of reference and
3548 definition work together, without breaking archive linking.
3549
3550 For a defined function "foo" and an undefined call to "bar":
3551 An old object defines "foo" and ".foo", references ".bar" (possibly
3552 "bar" too).
3553 A new object defines "foo" and references "bar".
3554
3555 A new object thus has no problem with its undefined symbols being
3556 satisfied by definitions in an old object. On the other hand, the
3557 old object won't have ".bar" satisfied by a new object.
3558
3559 Keep a list of newly added dot-symbols. */
3560
3561 if (string[0] == '.')
3562 {
3563 struct ppc_link_hash_table *htab;
3564
3565 htab = (struct ppc_link_hash_table *) table;
3566 eh->u.next_dot_sym = htab->dot_syms;
3567 htab->dot_syms = eh;
3568 }
3569 }
3570
3571 return entry;
3572 }
3573
3574 /* Create a ppc64 ELF linker hash table. */
3575
3576 static struct bfd_link_hash_table *
3577 ppc64_elf_link_hash_table_create (bfd *abfd)
3578 {
3579 struct ppc_link_hash_table *htab;
3580 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3581
3582 htab = bfd_zmalloc (amt);
3583 if (htab == NULL)
3584 return NULL;
3585
3586 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3587 sizeof (struct ppc_link_hash_entry)))
3588 {
3589 free (htab);
3590 return NULL;
3591 }
3592
3593 /* Init the stub hash table too. */
3594 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3595 sizeof (struct ppc_stub_hash_entry)))
3596 return NULL;
3597
3598 /* And the branch hash table. */
3599 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3600 sizeof (struct ppc_branch_hash_entry)))
3601 return NULL;
3602
3603 /* Initializing two fields of the union is just cosmetic. We really
3604 only care about glist, but when compiled on a 32-bit host the
3605 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3606 debugger inspection of these fields look nicer. */
3607 htab->elf.init_got_refcount.refcount = 0;
3608 htab->elf.init_got_refcount.glist = NULL;
3609 htab->elf.init_plt_refcount.refcount = 0;
3610 htab->elf.init_plt_refcount.glist = NULL;
3611 htab->elf.init_got_offset.offset = 0;
3612 htab->elf.init_got_offset.glist = NULL;
3613 htab->elf.init_plt_offset.offset = 0;
3614 htab->elf.init_plt_offset.glist = NULL;
3615
3616 return &htab->elf.root;
3617 }
3618
3619 /* Free the derived linker hash table. */
3620
3621 static void
3622 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3623 {
3624 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3625
3626 bfd_hash_table_free (&ret->stub_hash_table);
3627 bfd_hash_table_free (&ret->branch_hash_table);
3628 _bfd_generic_link_hash_table_free (hash);
3629 }
3630
3631 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3632
3633 void
3634 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3635 {
3636 struct ppc_link_hash_table *htab;
3637
3638 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3639
3640 /* Always hook our dynamic sections into the first bfd, which is the
3641 linker created stub bfd. This ensures that the GOT header is at
3642 the start of the output TOC section. */
3643 htab = ppc_hash_table (info);
3644 htab->stub_bfd = abfd;
3645 htab->elf.dynobj = abfd;
3646 }
3647
3648 /* Build a name for an entry in the stub hash table. */
3649
3650 static char *
3651 ppc_stub_name (const asection *input_section,
3652 const asection *sym_sec,
3653 const struct ppc_link_hash_entry *h,
3654 const Elf_Internal_Rela *rel)
3655 {
3656 char *stub_name;
3657 bfd_size_type len;
3658
3659 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3660 offsets from a sym as a branch target? In fact, we could
3661 probably assume the addend is always zero. */
3662 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3663
3664 if (h)
3665 {
3666 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3667 stub_name = bfd_malloc (len);
3668 if (stub_name == NULL)
3669 return stub_name;
3670
3671 sprintf (stub_name, "%08x.%s+%x",
3672 input_section->id & 0xffffffff,
3673 h->elf.root.root.string,
3674 (int) rel->r_addend & 0xffffffff);
3675 }
3676 else
3677 {
3678 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3679 stub_name = bfd_malloc (len);
3680 if (stub_name == NULL)
3681 return stub_name;
3682
3683 sprintf (stub_name, "%08x.%x:%x+%x",
3684 input_section->id & 0xffffffff,
3685 sym_sec->id & 0xffffffff,
3686 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3687 (int) rel->r_addend & 0xffffffff);
3688 }
3689 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3690 stub_name[len - 2] = 0;
3691 return stub_name;
3692 }
3693
3694 /* Look up an entry in the stub hash. Stub entries are cached because
3695 creating the stub name takes a bit of time. */
3696
3697 static struct ppc_stub_hash_entry *
3698 ppc_get_stub_entry (const asection *input_section,
3699 const asection *sym_sec,
3700 struct ppc_link_hash_entry *h,
3701 const Elf_Internal_Rela *rel,
3702 struct ppc_link_hash_table *htab)
3703 {
3704 struct ppc_stub_hash_entry *stub_entry;
3705 const asection *id_sec;
3706
3707 /* If this input section is part of a group of sections sharing one
3708 stub section, then use the id of the first section in the group.
3709 Stub names need to include a section id, as there may well be
3710 more than one stub used to reach say, printf, and we need to
3711 distinguish between them. */
3712 id_sec = htab->stub_group[input_section->id].link_sec;
3713
3714 if (h != NULL && h->u.stub_cache != NULL
3715 && h->u.stub_cache->h == h
3716 && h->u.stub_cache->id_sec == id_sec)
3717 {
3718 stub_entry = h->u.stub_cache;
3719 }
3720 else
3721 {
3722 char *stub_name;
3723
3724 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3725 if (stub_name == NULL)
3726 return NULL;
3727
3728 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3729 stub_name, FALSE, FALSE);
3730 if (h != NULL)
3731 h->u.stub_cache = stub_entry;
3732
3733 free (stub_name);
3734 }
3735
3736 return stub_entry;
3737 }
3738
3739 /* Add a new stub entry to the stub hash. Not all fields of the new
3740 stub entry are initialised. */
3741
3742 static struct ppc_stub_hash_entry *
3743 ppc_add_stub (const char *stub_name,
3744 asection *section,
3745 struct ppc_link_hash_table *htab)
3746 {
3747 asection *link_sec;
3748 asection *stub_sec;
3749 struct ppc_stub_hash_entry *stub_entry;
3750
3751 link_sec = htab->stub_group[section->id].link_sec;
3752 stub_sec = htab->stub_group[section->id].stub_sec;
3753 if (stub_sec == NULL)
3754 {
3755 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3756 if (stub_sec == NULL)
3757 {
3758 size_t namelen;
3759 bfd_size_type len;
3760 char *s_name;
3761
3762 namelen = strlen (link_sec->name);
3763 len = namelen + sizeof (STUB_SUFFIX);
3764 s_name = bfd_alloc (htab->stub_bfd, len);
3765 if (s_name == NULL)
3766 return NULL;
3767
3768 memcpy (s_name, link_sec->name, namelen);
3769 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3770 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3771 if (stub_sec == NULL)
3772 return NULL;
3773 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3774 }
3775 htab->stub_group[section->id].stub_sec = stub_sec;
3776 }
3777
3778 /* Enter this entry into the linker stub hash table. */
3779 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3780 TRUE, FALSE);
3781 if (stub_entry == NULL)
3782 {
3783 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3784 section->owner, stub_name);
3785 return NULL;
3786 }
3787
3788 stub_entry->stub_sec = stub_sec;
3789 stub_entry->stub_offset = 0;
3790 stub_entry->id_sec = link_sec;
3791 return stub_entry;
3792 }
3793
3794 /* Create sections for linker generated code. */
3795
3796 static bfd_boolean
3797 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3798 {
3799 struct ppc_link_hash_table *htab;
3800 flagword flags;
3801
3802 htab = ppc_hash_table (info);
3803
3804 /* Create .sfpr for code to save and restore fp regs. */
3805 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3806 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3807 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3808 flags);
3809 if (htab->sfpr == NULL
3810 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3811 return FALSE;
3812
3813 /* Create .glink for lazy dynamic linking support. */
3814 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3815 flags);
3816 if (htab->glink == NULL
3817 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3818 return FALSE;
3819
3820 /* Create branch lookup table for plt_branch stubs. */
3821 if (info->shared)
3822 {
3823 flags = (SEC_ALLOC | SEC_LOAD
3824 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3825 htab->brlt
3826 = bfd_make_section_anyway_with_flags (dynobj, ".data.rel.ro.brlt",
3827 flags);
3828 }
3829 else
3830 {
3831 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3832 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3833 htab->brlt
3834 = bfd_make_section_anyway_with_flags (dynobj, ".rodata.brlt", flags);
3835 }
3836
3837 if (htab->brlt == NULL
3838 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3839 return FALSE;
3840
3841 if (info->shared)
3842 {
3843 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3844 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3845 htab->relbrlt
3846 = bfd_make_section_anyway_with_flags (dynobj, ".rela.data.rel.ro.brlt",
3847 flags);
3848 }
3849 else
3850 return TRUE;
3851
3852 if (!htab->relbrlt
3853 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3854 return FALSE;
3855
3856 return TRUE;
3857 }
3858
3859 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3860 not already done. */
3861
3862 static bfd_boolean
3863 create_got_section (bfd *abfd, struct bfd_link_info *info)
3864 {
3865 asection *got, *relgot;
3866 flagword flags;
3867 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3868
3869 if (!htab->got)
3870 {
3871 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3872 return FALSE;
3873
3874 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3875 if (!htab->got)
3876 abort ();
3877 }
3878
3879 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3880 | SEC_LINKER_CREATED);
3881
3882 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3883 if (!got
3884 || !bfd_set_section_alignment (abfd, got, 3))
3885 return FALSE;
3886
3887 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3888 flags | SEC_READONLY);
3889 if (!relgot
3890 || ! bfd_set_section_alignment (abfd, relgot, 3))
3891 return FALSE;
3892
3893 ppc64_elf_tdata (abfd)->got = got;
3894 ppc64_elf_tdata (abfd)->relgot = relgot;
3895 return TRUE;
3896 }
3897
3898 /* Create the dynamic sections, and set up shortcuts. */
3899
3900 static bfd_boolean
3901 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3902 {
3903 struct ppc_link_hash_table *htab;
3904
3905 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3906 return FALSE;
3907
3908 htab = ppc_hash_table (info);
3909 if (!htab->got)
3910 htab->got = bfd_get_section_by_name (dynobj, ".got");
3911 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3912 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3913 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3914 if (!info->shared)
3915 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3916
3917 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3918 || (!info->shared && !htab->relbss))
3919 abort ();
3920
3921 return TRUE;
3922 }
3923
3924 /* Merge PLT info on FROM with that on TO. */
3925
3926 static void
3927 move_plt_plist (struct ppc_link_hash_entry *from,
3928 struct ppc_link_hash_entry *to)
3929 {
3930 if (from->elf.plt.plist != NULL)
3931 {
3932 if (to->elf.plt.plist != NULL)
3933 {
3934 struct plt_entry **entp;
3935 struct plt_entry *ent;
3936
3937 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3938 {
3939 struct plt_entry *dent;
3940
3941 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3942 if (dent->addend == ent->addend)
3943 {
3944 dent->plt.refcount += ent->plt.refcount;
3945 *entp = ent->next;
3946 break;
3947 }
3948 if (dent == NULL)
3949 entp = &ent->next;
3950 }
3951 *entp = to->elf.plt.plist;
3952 }
3953
3954 to->elf.plt.plist = from->elf.plt.plist;
3955 from->elf.plt.plist = NULL;
3956 }
3957 }
3958
3959 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3960
3961 static void
3962 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3963 struct elf_link_hash_entry *dir,
3964 struct elf_link_hash_entry *ind)
3965 {
3966 struct ppc_link_hash_entry *edir, *eind;
3967
3968 edir = (struct ppc_link_hash_entry *) dir;
3969 eind = (struct ppc_link_hash_entry *) ind;
3970
3971 /* Copy over any dynamic relocs we may have on the indirect sym. */
3972 if (eind->dyn_relocs != NULL)
3973 {
3974 if (edir->dyn_relocs != NULL)
3975 {
3976 struct ppc_dyn_relocs **pp;
3977 struct ppc_dyn_relocs *p;
3978
3979 /* Add reloc counts against the indirect sym to the direct sym
3980 list. Merge any entries against the same section. */
3981 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3982 {
3983 struct ppc_dyn_relocs *q;
3984
3985 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3986 if (q->sec == p->sec)
3987 {
3988 q->pc_count += p->pc_count;
3989 q->count += p->count;
3990 *pp = p->next;
3991 break;
3992 }
3993 if (q == NULL)
3994 pp = &p->next;
3995 }
3996 *pp = edir->dyn_relocs;
3997 }
3998
3999 edir->dyn_relocs = eind->dyn_relocs;
4000 eind->dyn_relocs = NULL;
4001 }
4002
4003 edir->is_func |= eind->is_func;
4004 edir->is_func_descriptor |= eind->is_func_descriptor;
4005 edir->tls_mask |= eind->tls_mask;
4006
4007 /* If called to transfer flags for a weakdef during processing
4008 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4009 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4010 if (!(ELIMINATE_COPY_RELOCS
4011 && eind->elf.root.type != bfd_link_hash_indirect
4012 && edir->elf.dynamic_adjusted))
4013 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4014
4015 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4016 edir->elf.ref_regular |= eind->elf.ref_regular;
4017 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4018 edir->elf.needs_plt |= eind->elf.needs_plt;
4019
4020 /* If we were called to copy over info for a weak sym, that's all. */
4021 if (eind->elf.root.type != bfd_link_hash_indirect)
4022 return;
4023
4024 /* Copy over got entries that we may have already seen to the
4025 symbol which just became indirect. */
4026 if (eind->elf.got.glist != NULL)
4027 {
4028 if (edir->elf.got.glist != NULL)
4029 {
4030 struct got_entry **entp;
4031 struct got_entry *ent;
4032
4033 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4034 {
4035 struct got_entry *dent;
4036
4037 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4038 if (dent->addend == ent->addend
4039 && dent->owner == ent->owner
4040 && dent->tls_type == ent->tls_type)
4041 {
4042 dent->got.refcount += ent->got.refcount;
4043 *entp = ent->next;
4044 break;
4045 }
4046 if (dent == NULL)
4047 entp = &ent->next;
4048 }
4049 *entp = edir->elf.got.glist;
4050 }
4051
4052 edir->elf.got.glist = eind->elf.got.glist;
4053 eind->elf.got.glist = NULL;
4054 }
4055
4056 /* And plt entries. */
4057 move_plt_plist (eind, edir);
4058
4059 if (eind->elf.dynindx != -1)
4060 {
4061 if (edir->elf.dynindx != -1)
4062 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4063 edir->elf.dynstr_index);
4064 edir->elf.dynindx = eind->elf.dynindx;
4065 edir->elf.dynstr_index = eind->elf.dynstr_index;
4066 eind->elf.dynindx = -1;
4067 eind->elf.dynstr_index = 0;
4068 }
4069 }
4070
4071 /* Find the function descriptor hash entry from the given function code
4072 hash entry FH. Link the entries via their OH fields. */
4073
4074 static struct ppc_link_hash_entry *
4075 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4076 {
4077 struct ppc_link_hash_entry *fdh = fh->oh;
4078
4079 if (fdh == NULL)
4080 {
4081 const char *fd_name = fh->elf.root.root.string + 1;
4082
4083 fdh = (struct ppc_link_hash_entry *)
4084 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4085 if (fdh != NULL)
4086 {
4087 fdh->is_func_descriptor = 1;
4088 fdh->oh = fh;
4089 fh->is_func = 1;
4090 fh->oh = fdh;
4091 }
4092 }
4093
4094 return fdh;
4095 }
4096
4097 /* Make a fake function descriptor sym for the code sym FH. */
4098
4099 static struct ppc_link_hash_entry *
4100 make_fdh (struct bfd_link_info *info,
4101 struct ppc_link_hash_entry *fh)
4102 {
4103 bfd *abfd;
4104 asymbol *newsym;
4105 struct bfd_link_hash_entry *bh;
4106 struct ppc_link_hash_entry *fdh;
4107
4108 abfd = fh->elf.root.u.undef.abfd;
4109 newsym = bfd_make_empty_symbol (abfd);
4110 newsym->name = fh->elf.root.root.string + 1;
4111 newsym->section = bfd_und_section_ptr;
4112 newsym->value = 0;
4113 newsym->flags = BSF_WEAK;
4114
4115 bh = NULL;
4116 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4117 newsym->flags, newsym->section,
4118 newsym->value, NULL, FALSE, FALSE,
4119 &bh))
4120 return NULL;
4121
4122 fdh = (struct ppc_link_hash_entry *) bh;
4123 fdh->elf.non_elf = 0;
4124 fdh->fake = 1;
4125 fdh->is_func_descriptor = 1;
4126 fdh->oh = fh;
4127 fh->is_func = 1;
4128 fh->oh = fdh;
4129 return fdh;
4130 }
4131
4132 /* Fix function descriptor symbols defined in .opd sections to be
4133 function type. */
4134
4135 static bfd_boolean
4136 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4137 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4138 Elf_Internal_Sym *isym,
4139 const char **name ATTRIBUTE_UNUSED,
4140 flagword *flags ATTRIBUTE_UNUSED,
4141 asection **sec,
4142 bfd_vma *value ATTRIBUTE_UNUSED)
4143 {
4144 if (*sec != NULL
4145 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4146 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4147
4148 return TRUE;
4149 }
4150
4151 /* This function makes an old ABI object reference to ".bar" cause the
4152 inclusion of a new ABI object archive that defines "bar".
4153 NAME is a symbol defined in an archive. Return a symbol in the hash
4154 table that might be satisfied by the archive symbols. */
4155
4156 static struct elf_link_hash_entry *
4157 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4158 struct bfd_link_info *info,
4159 const char *name)
4160 {
4161 struct elf_link_hash_entry *h;
4162 char *dot_name;
4163 size_t len;
4164
4165 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4166 if (h != NULL
4167 /* Don't return this sym if it is a fake function descriptor
4168 created by add_symbol_adjust. */
4169 && !(h->root.type == bfd_link_hash_undefweak
4170 && ((struct ppc_link_hash_entry *) h)->fake))
4171 return h;
4172
4173 if (name[0] == '.')
4174 return h;
4175
4176 len = strlen (name);
4177 dot_name = bfd_alloc (abfd, len + 2);
4178 if (dot_name == NULL)
4179 return (struct elf_link_hash_entry *) 0 - 1;
4180 dot_name[0] = '.';
4181 memcpy (dot_name + 1, name, len + 1);
4182 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4183 bfd_release (abfd, dot_name);
4184 return h;
4185 }
4186
4187 /* This function satisfies all old ABI object references to ".bar" if a
4188 new ABI object defines "bar". Well, at least, undefined dot symbols
4189 are made weak. This stops later archive searches from including an
4190 object if we already have a function descriptor definition. It also
4191 prevents the linker complaining about undefined symbols.
4192 We also check and correct mismatched symbol visibility here. The
4193 most restrictive visibility of the function descriptor and the
4194 function entry symbol is used. */
4195
4196 static bfd_boolean
4197 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4198 {
4199 struct ppc_link_hash_table *htab;
4200 struct ppc_link_hash_entry *fdh;
4201
4202 if (eh->elf.root.type == bfd_link_hash_indirect)
4203 return TRUE;
4204
4205 if (eh->elf.root.type == bfd_link_hash_warning)
4206 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4207
4208 if (eh->elf.root.root.string[0] != '.')
4209 abort ();
4210
4211 htab = ppc_hash_table (info);
4212 fdh = get_fdh (eh, htab);
4213 if (fdh == NULL
4214 && !info->relocatable
4215 && (eh->elf.root.type == bfd_link_hash_undefined
4216 || eh->elf.root.type == bfd_link_hash_undefweak)
4217 && eh->elf.ref_regular)
4218 {
4219 /* Make an undefweak function descriptor sym, which is enough to
4220 pull in an --as-needed shared lib, but won't cause link
4221 errors. Archives are handled elsewhere. */
4222 fdh = make_fdh (info, eh);
4223 if (fdh == NULL)
4224 return FALSE;
4225 else
4226 fdh->elf.ref_regular = 1;
4227 }
4228 else if (fdh != NULL)
4229 {
4230 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4231 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4232 if (entry_vis < descr_vis)
4233 fdh->elf.other += entry_vis - descr_vis;
4234 else if (entry_vis > descr_vis)
4235 eh->elf.other += descr_vis - entry_vis;
4236
4237 if ((fdh->elf.root.type == bfd_link_hash_defined
4238 || fdh->elf.root.type == bfd_link_hash_defweak)
4239 && eh->elf.root.type == bfd_link_hash_undefined)
4240 {
4241 eh->elf.root.type = bfd_link_hash_undefweak;
4242 eh->was_undefined = 1;
4243 htab->twiddled_syms = 1;
4244 }
4245 }
4246
4247 return TRUE;
4248 }
4249
4250 /* Process list of dot-symbols we made in link_hash_newfunc. */
4251
4252 static bfd_boolean
4253 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4254 {
4255 struct ppc_link_hash_table *htab;
4256 struct ppc_link_hash_entry **p, *eh;
4257
4258 htab = ppc_hash_table (info);
4259 if (!is_ppc64_elf_target (htab->elf.root.creator))
4260 return TRUE;
4261
4262 if (is_ppc64_elf_target (ibfd->xvec))
4263 {
4264 p = &htab->dot_syms;
4265 while ((eh = *p) != NULL)
4266 {
4267 *p = NULL;
4268 if (!add_symbol_adjust (eh, info))
4269 return FALSE;
4270 p = &eh->u.next_dot_sym;
4271 }
4272 }
4273
4274 /* Clear the list for non-ppc64 input files. */
4275 p = &htab->dot_syms;
4276 while ((eh = *p) != NULL)
4277 {
4278 *p = NULL;
4279 p = &eh->u.next_dot_sym;
4280 }
4281
4282 /* We need to fix the undefs list for any syms we have twiddled to
4283 undef_weak. */
4284 if (htab->twiddled_syms)
4285 {
4286 bfd_link_repair_undef_list (&htab->elf.root);
4287 htab->twiddled_syms = 0;
4288 }
4289 return TRUE;
4290 }
4291
4292 /* Undo hash table changes when an --as-needed input file is determined
4293 not to be needed. */
4294
4295 static bfd_boolean
4296 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4297 struct bfd_link_info *info)
4298 {
4299 ppc_hash_table (info)->dot_syms = NULL;
4300 return TRUE;
4301 }
4302
4303 static bfd_boolean
4304 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4305 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4306 {
4307 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4308 char *local_got_tls_masks;
4309
4310 if (local_got_ents == NULL)
4311 {
4312 bfd_size_type size = symtab_hdr->sh_info;
4313
4314 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4315 local_got_ents = bfd_zalloc (abfd, size);
4316 if (local_got_ents == NULL)
4317 return FALSE;
4318 elf_local_got_ents (abfd) = local_got_ents;
4319 }
4320
4321 if ((tls_type & TLS_EXPLICIT) == 0)
4322 {
4323 struct got_entry *ent;
4324
4325 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4326 if (ent->addend == r_addend
4327 && ent->owner == abfd
4328 && ent->tls_type == tls_type)
4329 break;
4330 if (ent == NULL)
4331 {
4332 bfd_size_type amt = sizeof (*ent);
4333 ent = bfd_alloc (abfd, amt);
4334 if (ent == NULL)
4335 return FALSE;
4336 ent->next = local_got_ents[r_symndx];
4337 ent->addend = r_addend;
4338 ent->owner = abfd;
4339 ent->tls_type = tls_type;
4340 ent->got.refcount = 0;
4341 local_got_ents[r_symndx] = ent;
4342 }
4343 ent->got.refcount += 1;
4344 }
4345
4346 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4347 local_got_tls_masks[r_symndx] |= tls_type;
4348 return TRUE;
4349 }
4350
4351 static bfd_boolean
4352 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4353 {
4354 struct plt_entry *ent;
4355
4356 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4357 if (ent->addend == addend)
4358 break;
4359 if (ent == NULL)
4360 {
4361 bfd_size_type amt = sizeof (*ent);
4362 ent = bfd_alloc (abfd, amt);
4363 if (ent == NULL)
4364 return FALSE;
4365 ent->next = eh->elf.plt.plist;
4366 ent->addend = addend;
4367 ent->plt.refcount = 0;
4368 eh->elf.plt.plist = ent;
4369 }
4370 ent->plt.refcount += 1;
4371 eh->elf.needs_plt = 1;
4372 if (eh->elf.root.root.string[0] == '.'
4373 && eh->elf.root.root.string[1] != '\0')
4374 eh->is_func = 1;
4375 return TRUE;
4376 }
4377
4378 /* Look through the relocs for a section during the first phase, and
4379 calculate needed space in the global offset table, procedure
4380 linkage table, and dynamic reloc sections. */
4381
4382 static bfd_boolean
4383 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4384 asection *sec, const Elf_Internal_Rela *relocs)
4385 {
4386 struct ppc_link_hash_table *htab;
4387 Elf_Internal_Shdr *symtab_hdr;
4388 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4389 const Elf_Internal_Rela *rel;
4390 const Elf_Internal_Rela *rel_end;
4391 asection *sreloc;
4392 asection **opd_sym_map;
4393
4394 if (info->relocatable)
4395 return TRUE;
4396
4397 /* Don't do anything special with non-loaded, non-alloced sections.
4398 In particular, any relocs in such sections should not affect GOT
4399 and PLT reference counting (ie. we don't allow them to create GOT
4400 or PLT entries), there's no possibility or desire to optimize TLS
4401 relocs, and there's not much point in propagating relocs to shared
4402 libs that the dynamic linker won't relocate. */
4403 if ((sec->flags & SEC_ALLOC) == 0)
4404 return TRUE;
4405
4406 htab = ppc_hash_table (info);
4407 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4408
4409 sym_hashes = elf_sym_hashes (abfd);
4410 sym_hashes_end = (sym_hashes
4411 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4412 - symtab_hdr->sh_info);
4413
4414 sreloc = NULL;
4415 opd_sym_map = NULL;
4416 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4417 {
4418 /* Garbage collection needs some extra help with .opd sections.
4419 We don't want to necessarily keep everything referenced by
4420 relocs in .opd, as that would keep all functions. Instead,
4421 if we reference an .opd symbol (a function descriptor), we
4422 want to keep the function code symbol's section. This is
4423 easy for global symbols, but for local syms we need to keep
4424 information about the associated function section. Later, if
4425 edit_opd deletes entries, we'll use this array to adjust
4426 local syms in .opd. */
4427 union opd_info {
4428 asection *func_section;
4429 long entry_adjust;
4430 };
4431 bfd_size_type amt;
4432
4433 amt = sec->size * sizeof (union opd_info) / 8;
4434 opd_sym_map = bfd_zalloc (abfd, amt);
4435 if (opd_sym_map == NULL)
4436 return FALSE;
4437 ppc64_elf_section_data (sec)->u.opd_func_sec = opd_sym_map;
4438 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4439 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4440 }
4441
4442 if (htab->sfpr == NULL
4443 && !create_linkage_sections (htab->elf.dynobj, info))
4444 return FALSE;
4445
4446 rel_end = relocs + sec->reloc_count;
4447 for (rel = relocs; rel < rel_end; rel++)
4448 {
4449 unsigned long r_symndx;
4450 struct elf_link_hash_entry *h;
4451 enum elf_ppc64_reloc_type r_type;
4452 int tls_type = 0;
4453 struct _ppc64_elf_section_data *ppc64_sec;
4454
4455 r_symndx = ELF64_R_SYM (rel->r_info);
4456 if (r_symndx < symtab_hdr->sh_info)
4457 h = NULL;
4458 else
4459 {
4460 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4461 while (h->root.type == bfd_link_hash_indirect
4462 || h->root.type == bfd_link_hash_warning)
4463 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4464 }
4465
4466 r_type = ELF64_R_TYPE (rel->r_info);
4467 switch (r_type)
4468 {
4469 case R_PPC64_GOT_TLSLD16:
4470 case R_PPC64_GOT_TLSLD16_LO:
4471 case R_PPC64_GOT_TLSLD16_HI:
4472 case R_PPC64_GOT_TLSLD16_HA:
4473 ppc64_tlsld_got (abfd)->refcount += 1;
4474 tls_type = TLS_TLS | TLS_LD;
4475 goto dogottls;
4476
4477 case R_PPC64_GOT_TLSGD16:
4478 case R_PPC64_GOT_TLSGD16_LO:
4479 case R_PPC64_GOT_TLSGD16_HI:
4480 case R_PPC64_GOT_TLSGD16_HA:
4481 tls_type = TLS_TLS | TLS_GD;
4482 goto dogottls;
4483
4484 case R_PPC64_GOT_TPREL16_DS:
4485 case R_PPC64_GOT_TPREL16_LO_DS:
4486 case R_PPC64_GOT_TPREL16_HI:
4487 case R_PPC64_GOT_TPREL16_HA:
4488 if (info->shared)
4489 info->flags |= DF_STATIC_TLS;
4490 tls_type = TLS_TLS | TLS_TPREL;
4491 goto dogottls;
4492
4493 case R_PPC64_GOT_DTPREL16_DS:
4494 case R_PPC64_GOT_DTPREL16_LO_DS:
4495 case R_PPC64_GOT_DTPREL16_HI:
4496 case R_PPC64_GOT_DTPREL16_HA:
4497 tls_type = TLS_TLS | TLS_DTPREL;
4498 dogottls:
4499 sec->has_tls_reloc = 1;
4500 /* Fall thru */
4501
4502 case R_PPC64_GOT16:
4503 case R_PPC64_GOT16_DS:
4504 case R_PPC64_GOT16_HA:
4505 case R_PPC64_GOT16_HI:
4506 case R_PPC64_GOT16_LO:
4507 case R_PPC64_GOT16_LO_DS:
4508 /* This symbol requires a global offset table entry. */
4509 sec->has_toc_reloc = 1;
4510 if (ppc64_elf_tdata (abfd)->got == NULL
4511 && !create_got_section (abfd, info))
4512 return FALSE;
4513
4514 if (h != NULL)
4515 {
4516 struct ppc_link_hash_entry *eh;
4517 struct got_entry *ent;
4518
4519 eh = (struct ppc_link_hash_entry *) h;
4520 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4521 if (ent->addend == rel->r_addend
4522 && ent->owner == abfd
4523 && ent->tls_type == tls_type)
4524 break;
4525 if (ent == NULL)
4526 {
4527 bfd_size_type amt = sizeof (*ent);
4528 ent = bfd_alloc (abfd, amt);
4529 if (ent == NULL)
4530 return FALSE;
4531 ent->next = eh->elf.got.glist;
4532 ent->addend = rel->r_addend;
4533 ent->owner = abfd;
4534 ent->tls_type = tls_type;
4535 ent->got.refcount = 0;
4536 eh->elf.got.glist = ent;
4537 }
4538 ent->got.refcount += 1;
4539 eh->tls_mask |= tls_type;
4540 }
4541 else
4542 /* This is a global offset table entry for a local symbol. */
4543 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4544 rel->r_addend, tls_type))
4545 return FALSE;
4546 break;
4547
4548 case R_PPC64_PLT16_HA:
4549 case R_PPC64_PLT16_HI:
4550 case R_PPC64_PLT16_LO:
4551 case R_PPC64_PLT32:
4552 case R_PPC64_PLT64:
4553 /* This symbol requires a procedure linkage table entry. We
4554 actually build the entry in adjust_dynamic_symbol,
4555 because this might be a case of linking PIC code without
4556 linking in any dynamic objects, in which case we don't
4557 need to generate a procedure linkage table after all. */
4558 if (h == NULL)
4559 {
4560 /* It does not make sense to have a procedure linkage
4561 table entry for a local symbol. */
4562 bfd_set_error (bfd_error_bad_value);
4563 return FALSE;
4564 }
4565 else
4566 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4567 rel->r_addend))
4568 return FALSE;
4569 break;
4570
4571 /* The following relocations don't need to propagate the
4572 relocation if linking a shared object since they are
4573 section relative. */
4574 case R_PPC64_SECTOFF:
4575 case R_PPC64_SECTOFF_LO:
4576 case R_PPC64_SECTOFF_HI:
4577 case R_PPC64_SECTOFF_HA:
4578 case R_PPC64_SECTOFF_DS:
4579 case R_PPC64_SECTOFF_LO_DS:
4580 case R_PPC64_DTPREL16:
4581 case R_PPC64_DTPREL16_LO:
4582 case R_PPC64_DTPREL16_HI:
4583 case R_PPC64_DTPREL16_HA:
4584 case R_PPC64_DTPREL16_DS:
4585 case R_PPC64_DTPREL16_LO_DS:
4586 case R_PPC64_DTPREL16_HIGHER:
4587 case R_PPC64_DTPREL16_HIGHERA:
4588 case R_PPC64_DTPREL16_HIGHEST:
4589 case R_PPC64_DTPREL16_HIGHESTA:
4590 break;
4591
4592 /* Nor do these. */
4593 case R_PPC64_TOC16:
4594 case R_PPC64_TOC16_LO:
4595 case R_PPC64_TOC16_HI:
4596 case R_PPC64_TOC16_HA:
4597 case R_PPC64_TOC16_DS:
4598 case R_PPC64_TOC16_LO_DS:
4599 sec->has_toc_reloc = 1;
4600 break;
4601
4602 /* This relocation describes the C++ object vtable hierarchy.
4603 Reconstruct it for later use during GC. */
4604 case R_PPC64_GNU_VTINHERIT:
4605 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4606 return FALSE;
4607 break;
4608
4609 /* This relocation describes which C++ vtable entries are actually
4610 used. Record for later use during GC. */
4611 case R_PPC64_GNU_VTENTRY:
4612 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4613 return FALSE;
4614 break;
4615
4616 case R_PPC64_REL14:
4617 case R_PPC64_REL14_BRTAKEN:
4618 case R_PPC64_REL14_BRNTAKEN:
4619 {
4620 asection *dest = NULL;
4621
4622 /* Heuristic: If jumping outside our section, chances are
4623 we are going to need a stub. */
4624 if (h != NULL)
4625 {
4626 /* If the sym is weak it may be overridden later, so
4627 don't assume we know where a weak sym lives. */
4628 if (h->root.type == bfd_link_hash_defined)
4629 dest = h->root.u.def.section;
4630 }
4631 else
4632 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4633 sec, r_symndx);
4634 if (dest != sec)
4635 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4636 }
4637 /* Fall through. */
4638
4639 case R_PPC64_REL24:
4640 if (h != NULL)
4641 {
4642 /* We may need a .plt entry if the function this reloc
4643 refers to is in a shared lib. */
4644 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4645 rel->r_addend))
4646 return FALSE;
4647 if (h == &htab->tls_get_addr->elf
4648 || h == &htab->tls_get_addr_fd->elf)
4649 sec->has_tls_reloc = 1;
4650 else if (htab->tls_get_addr == NULL
4651 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4652 && (h->root.root.string[15] == 0
4653 || h->root.root.string[15] == '@'))
4654 {
4655 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4656 sec->has_tls_reloc = 1;
4657 }
4658 else if (htab->tls_get_addr_fd == NULL
4659 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4660 && (h->root.root.string[14] == 0
4661 || h->root.root.string[14] == '@'))
4662 {
4663 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4664 sec->has_tls_reloc = 1;
4665 }
4666 }
4667 break;
4668
4669 case R_PPC64_TPREL64:
4670 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4671 if (info->shared)
4672 info->flags |= DF_STATIC_TLS;
4673 goto dotlstoc;
4674
4675 case R_PPC64_DTPMOD64:
4676 if (rel + 1 < rel_end
4677 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4678 && rel[1].r_offset == rel->r_offset + 8)
4679 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4680 else
4681 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4682 goto dotlstoc;
4683
4684 case R_PPC64_DTPREL64:
4685 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4686 if (rel != relocs
4687 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4688 && rel[-1].r_offset == rel->r_offset - 8)
4689 /* This is the second reloc of a dtpmod, dtprel pair.
4690 Don't mark with TLS_DTPREL. */
4691 goto dodyn;
4692
4693 dotlstoc:
4694 sec->has_tls_reloc = 1;
4695 if (h != NULL)
4696 {
4697 struct ppc_link_hash_entry *eh;
4698 eh = (struct ppc_link_hash_entry *) h;
4699 eh->tls_mask |= tls_type;
4700 }
4701 else
4702 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4703 rel->r_addend, tls_type))
4704 return FALSE;
4705
4706 ppc64_sec = ppc64_elf_section_data (sec);
4707 if (ppc64_sec->sec_type != sec_toc)
4708 {
4709 /* One extra to simplify get_tls_mask. */
4710 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4711 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4712 if (ppc64_sec->u.t_symndx == NULL)
4713 return FALSE;
4714 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4715 ppc64_sec->sec_type = sec_toc;
4716 }
4717 BFD_ASSERT (rel->r_offset % 8 == 0);
4718 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4719
4720 /* Mark the second slot of a GD or LD entry.
4721 -1 to indicate GD and -2 to indicate LD. */
4722 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4723 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4724 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4725 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4726 goto dodyn;
4727
4728 case R_PPC64_TPREL16:
4729 case R_PPC64_TPREL16_LO:
4730 case R_PPC64_TPREL16_HI:
4731 case R_PPC64_TPREL16_HA:
4732 case R_PPC64_TPREL16_DS:
4733 case R_PPC64_TPREL16_LO_DS:
4734 case R_PPC64_TPREL16_HIGHER:
4735 case R_PPC64_TPREL16_HIGHERA:
4736 case R_PPC64_TPREL16_HIGHEST:
4737 case R_PPC64_TPREL16_HIGHESTA:
4738 if (info->shared)
4739 {
4740 info->flags |= DF_STATIC_TLS;
4741 goto dodyn;
4742 }
4743 break;
4744
4745 case R_PPC64_ADDR64:
4746 if (opd_sym_map != NULL
4747 && rel + 1 < rel_end
4748 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4749 {
4750 if (h != NULL)
4751 {
4752 if (h->root.root.string[0] == '.'
4753 && h->root.root.string[1] != 0
4754 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4755 ;
4756 else
4757 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4758 }
4759 else
4760 {
4761 asection *s;
4762
4763 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4764 r_symndx);
4765 if (s == NULL)
4766 return FALSE;
4767 else if (s != sec)
4768 opd_sym_map[rel->r_offset / 8] = s;
4769 }
4770 }
4771 /* Fall through. */
4772
4773 case R_PPC64_REL30:
4774 case R_PPC64_REL32:
4775 case R_PPC64_REL64:
4776 case R_PPC64_ADDR14:
4777 case R_PPC64_ADDR14_BRNTAKEN:
4778 case R_PPC64_ADDR14_BRTAKEN:
4779 case R_PPC64_ADDR16:
4780 case R_PPC64_ADDR16_DS:
4781 case R_PPC64_ADDR16_HA:
4782 case R_PPC64_ADDR16_HI:
4783 case R_PPC64_ADDR16_HIGHER:
4784 case R_PPC64_ADDR16_HIGHERA:
4785 case R_PPC64_ADDR16_HIGHEST:
4786 case R_PPC64_ADDR16_HIGHESTA:
4787 case R_PPC64_ADDR16_LO:
4788 case R_PPC64_ADDR16_LO_DS:
4789 case R_PPC64_ADDR24:
4790 case R_PPC64_ADDR32:
4791 case R_PPC64_UADDR16:
4792 case R_PPC64_UADDR32:
4793 case R_PPC64_UADDR64:
4794 case R_PPC64_TOC:
4795 if (h != NULL && !info->shared)
4796 /* We may need a copy reloc. */
4797 h->non_got_ref = 1;
4798
4799 /* Don't propagate .opd relocs. */
4800 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4801 break;
4802
4803 /* If we are creating a shared library, and this is a reloc
4804 against a global symbol, or a non PC relative reloc
4805 against a local symbol, then we need to copy the reloc
4806 into the shared library. However, if we are linking with
4807 -Bsymbolic, we do not need to copy a reloc against a
4808 global symbol which is defined in an object we are
4809 including in the link (i.e., DEF_REGULAR is set). At
4810 this point we have not seen all the input files, so it is
4811 possible that DEF_REGULAR is not set now but will be set
4812 later (it is never cleared). In case of a weak definition,
4813 DEF_REGULAR may be cleared later by a strong definition in
4814 a shared library. We account for that possibility below by
4815 storing information in the dyn_relocs field of the hash
4816 table entry. A similar situation occurs when creating
4817 shared libraries and symbol visibility changes render the
4818 symbol local.
4819
4820 If on the other hand, we are creating an executable, we
4821 may need to keep relocations for symbols satisfied by a
4822 dynamic library if we manage to avoid copy relocs for the
4823 symbol. */
4824 dodyn:
4825 if ((info->shared
4826 && (MUST_BE_DYN_RELOC (r_type)
4827 || (h != NULL
4828 && (! info->symbolic
4829 || h->root.type == bfd_link_hash_defweak
4830 || !h->def_regular))))
4831 || (ELIMINATE_COPY_RELOCS
4832 && !info->shared
4833 && h != NULL
4834 && (h->root.type == bfd_link_hash_defweak
4835 || !h->def_regular)))
4836 {
4837 struct ppc_dyn_relocs *p;
4838 struct ppc_dyn_relocs **head;
4839
4840 /* We must copy these reloc types into the output file.
4841 Create a reloc section in dynobj and make room for
4842 this reloc. */
4843 if (sreloc == NULL)
4844 {
4845 const char *name;
4846 bfd *dynobj;
4847
4848 name = (bfd_elf_string_from_elf_section
4849 (abfd,
4850 elf_elfheader (abfd)->e_shstrndx,
4851 elf_section_data (sec)->rel_hdr.sh_name));
4852 if (name == NULL)
4853 return FALSE;
4854
4855 if (! CONST_STRNEQ (name, ".rela")
4856 || strcmp (bfd_get_section_name (abfd, sec),
4857 name + 5) != 0)
4858 {
4859 (*_bfd_error_handler)
4860 (_("%B: bad relocation section name `%s\'"),
4861 abfd, name);
4862 bfd_set_error (bfd_error_bad_value);
4863 }
4864
4865 dynobj = htab->elf.dynobj;
4866 sreloc = bfd_get_section_by_name (dynobj, name);
4867 if (sreloc == NULL)
4868 {
4869 flagword flags;
4870
4871 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4872 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4873 | SEC_ALLOC | SEC_LOAD);
4874 sreloc = bfd_make_section_with_flags (dynobj,
4875 name,
4876 flags);
4877 if (sreloc == NULL
4878 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4879 return FALSE;
4880 }
4881 elf_section_data (sec)->sreloc = sreloc;
4882 }
4883
4884 /* If this is a global symbol, we count the number of
4885 relocations we need for this symbol. */
4886 if (h != NULL)
4887 {
4888 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4889 }
4890 else
4891 {
4892 /* Track dynamic relocs needed for local syms too.
4893 We really need local syms available to do this
4894 easily. Oh well. */
4895
4896 asection *s;
4897 void *vpp;
4898
4899 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4900 sec, r_symndx);
4901 if (s == NULL)
4902 return FALSE;
4903
4904 vpp = &elf_section_data (s)->local_dynrel;
4905 head = (struct ppc_dyn_relocs **) vpp;
4906 }
4907
4908 p = *head;
4909 if (p == NULL || p->sec != sec)
4910 {
4911 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4912 if (p == NULL)
4913 return FALSE;
4914 p->next = *head;
4915 *head = p;
4916 p->sec = sec;
4917 p->count = 0;
4918 p->pc_count = 0;
4919 }
4920
4921 p->count += 1;
4922 if (!MUST_BE_DYN_RELOC (r_type))
4923 p->pc_count += 1;
4924 }
4925 break;
4926
4927 default:
4928 break;
4929 }
4930 }
4931
4932 return TRUE;
4933 }
4934
4935 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4936 of the code entry point, and its section. */
4937
4938 static bfd_vma
4939 opd_entry_value (asection *opd_sec,
4940 bfd_vma offset,
4941 asection **code_sec,
4942 bfd_vma *code_off)
4943 {
4944 bfd *opd_bfd = opd_sec->owner;
4945 Elf_Internal_Rela *relocs;
4946 Elf_Internal_Rela *lo, *hi, *look;
4947 bfd_vma val;
4948
4949 /* No relocs implies we are linking a --just-symbols object. */
4950 if (opd_sec->reloc_count == 0)
4951 {
4952 bfd_vma val;
4953
4954 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4955 return (bfd_vma) -1;
4956
4957 if (code_sec != NULL)
4958 {
4959 asection *sec, *likely = NULL;
4960 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4961 if (sec->vma <= val
4962 && (sec->flags & SEC_LOAD) != 0
4963 && (sec->flags & SEC_ALLOC) != 0)
4964 likely = sec;
4965 if (likely != NULL)
4966 {
4967 *code_sec = likely;
4968 if (code_off != NULL)
4969 *code_off = val - likely->vma;
4970 }
4971 }
4972 return val;
4973 }
4974
4975 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4976 if (relocs == NULL)
4977 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4978
4979 /* Go find the opd reloc at the sym address. */
4980 lo = relocs;
4981 BFD_ASSERT (lo != NULL);
4982 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4983 val = (bfd_vma) -1;
4984 while (lo < hi)
4985 {
4986 look = lo + (hi - lo) / 2;
4987 if (look->r_offset < offset)
4988 lo = look + 1;
4989 else if (look->r_offset > offset)
4990 hi = look;
4991 else
4992 {
4993 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4994 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4995 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4996 {
4997 unsigned long symndx = ELF64_R_SYM (look->r_info);
4998 asection *sec;
4999
5000 if (symndx < symtab_hdr->sh_info)
5001 {
5002 Elf_Internal_Sym *sym;
5003
5004 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5005 if (sym == NULL)
5006 {
5007 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5008 symtab_hdr->sh_info,
5009 0, NULL, NULL, NULL);
5010 if (sym == NULL)
5011 break;
5012 symtab_hdr->contents = (bfd_byte *) sym;
5013 }
5014
5015 sym += symndx;
5016 val = sym->st_value;
5017 sec = NULL;
5018 if ((sym->st_shndx != SHN_UNDEF
5019 && sym->st_shndx < SHN_LORESERVE)
5020 || sym->st_shndx > SHN_HIRESERVE)
5021 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5022 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5023 }
5024 else
5025 {
5026 struct elf_link_hash_entry **sym_hashes;
5027 struct elf_link_hash_entry *rh;
5028
5029 sym_hashes = elf_sym_hashes (opd_bfd);
5030 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5031 while (rh->root.type == bfd_link_hash_indirect
5032 || rh->root.type == bfd_link_hash_warning)
5033 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5034 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5035 || rh->root.type == bfd_link_hash_defweak);
5036 val = rh->root.u.def.value;
5037 sec = rh->root.u.def.section;
5038 }
5039 val += look->r_addend;
5040 if (code_off != NULL)
5041 *code_off = val;
5042 if (code_sec != NULL)
5043 *code_sec = sec;
5044 if (sec != NULL && sec->output_section != NULL)
5045 val += sec->output_section->vma + sec->output_offset;
5046 }
5047 break;
5048 }
5049 }
5050
5051 return val;
5052 }
5053
5054 /* Mark sections containing dynamically referenced symbols. When
5055 building shared libraries, we must assume that any visible symbol is
5056 referenced. */
5057
5058 static bfd_boolean
5059 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5060 {
5061 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5062 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5063
5064 if (eh->elf.root.type == bfd_link_hash_warning)
5065 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5066
5067 /* Dynamic linking info is on the func descriptor sym. */
5068 if (eh->oh != NULL
5069 && eh->oh->is_func_descriptor
5070 && (eh->oh->elf.root.type == bfd_link_hash_defined
5071 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5072 eh = eh->oh;
5073
5074 if ((eh->elf.root.type == bfd_link_hash_defined
5075 || eh->elf.root.type == bfd_link_hash_defweak)
5076 && (eh->elf.ref_dynamic
5077 || (!info->executable
5078 && eh->elf.def_regular
5079 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5080 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5081 {
5082 asection *code_sec;
5083
5084 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5085
5086 /* Function descriptor syms cause the associated
5087 function code sym section to be marked. */
5088 if (eh->is_func_descriptor
5089 && (eh->oh->elf.root.type == bfd_link_hash_defined
5090 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5091 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5092 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5093 && opd_entry_value (eh->elf.root.u.def.section,
5094 eh->elf.root.u.def.value,
5095 &code_sec, NULL) != (bfd_vma) -1)
5096 code_sec->flags |= SEC_KEEP;
5097 }
5098
5099 return TRUE;
5100 }
5101
5102 /* Return the section that should be marked against GC for a given
5103 relocation. */
5104
5105 static asection *
5106 ppc64_elf_gc_mark_hook (asection *sec,
5107 struct bfd_link_info *info,
5108 Elf_Internal_Rela *rel,
5109 struct elf_link_hash_entry *h,
5110 Elf_Internal_Sym *sym)
5111 {
5112 asection *rsec;
5113
5114 /* First mark all our entry sym sections. */
5115 if (info->gc_sym_list != NULL)
5116 {
5117 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5118 struct bfd_sym_chain *sym = info->gc_sym_list;
5119
5120 info->gc_sym_list = NULL;
5121 for (; sym != NULL; sym = sym->next)
5122 {
5123 struct ppc_link_hash_entry *eh;
5124
5125 eh = (struct ppc_link_hash_entry *)
5126 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5127 if (eh == NULL)
5128 continue;
5129 if (eh->elf.root.type != bfd_link_hash_defined
5130 && eh->elf.root.type != bfd_link_hash_defweak)
5131 continue;
5132
5133 if (eh->is_func_descriptor
5134 && (eh->oh->elf.root.type == bfd_link_hash_defined
5135 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5136 rsec = eh->oh->elf.root.u.def.section;
5137 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5138 && opd_entry_value (eh->elf.root.u.def.section,
5139 eh->elf.root.u.def.value,
5140 &rsec, NULL) != (bfd_vma) -1)
5141 ;
5142 else
5143 continue;
5144
5145 if (!rsec->gc_mark)
5146 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5147
5148 rsec = eh->elf.root.u.def.section;
5149 if (!rsec->gc_mark)
5150 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5151 }
5152 }
5153
5154 /* Syms return NULL if we're marking .opd, so we avoid marking all
5155 function sections, as all functions are referenced in .opd. */
5156 rsec = NULL;
5157 if (get_opd_info (sec) != NULL)
5158 return rsec;
5159
5160 if (h != NULL)
5161 {
5162 enum elf_ppc64_reloc_type r_type;
5163 struct ppc_link_hash_entry *eh;
5164
5165 r_type = ELF64_R_TYPE (rel->r_info);
5166 switch (r_type)
5167 {
5168 case R_PPC64_GNU_VTINHERIT:
5169 case R_PPC64_GNU_VTENTRY:
5170 break;
5171
5172 default:
5173 switch (h->root.type)
5174 {
5175 case bfd_link_hash_defined:
5176 case bfd_link_hash_defweak:
5177 eh = (struct ppc_link_hash_entry *) h;
5178 if (eh->oh != NULL
5179 && eh->oh->is_func_descriptor
5180 && (eh->oh->elf.root.type == bfd_link_hash_defined
5181 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5182 eh = eh->oh;
5183
5184 /* Function descriptor syms cause the associated
5185 function code sym section to be marked. */
5186 if (eh->is_func_descriptor
5187 && (eh->oh->elf.root.type == bfd_link_hash_defined
5188 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5189 {
5190 /* They also mark their opd section. */
5191 if (!eh->elf.root.u.def.section->gc_mark)
5192 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5193 ppc64_elf_gc_mark_hook);
5194
5195 rsec = eh->oh->elf.root.u.def.section;
5196 }
5197 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5198 && opd_entry_value (eh->elf.root.u.def.section,
5199 eh->elf.root.u.def.value,
5200 &rsec, NULL) != (bfd_vma) -1)
5201 {
5202 if (!eh->elf.root.u.def.section->gc_mark)
5203 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5204 ppc64_elf_gc_mark_hook);
5205 }
5206 else
5207 rsec = h->root.u.def.section;
5208 break;
5209
5210 case bfd_link_hash_common:
5211 rsec = h->root.u.c.p->section;
5212 break;
5213
5214 default:
5215 break;
5216 }
5217 }
5218 }
5219 else
5220 {
5221 asection **opd_sym_section;
5222
5223 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5224 opd_sym_section = get_opd_info (rsec);
5225 if (opd_sym_section != NULL)
5226 {
5227 if (!rsec->gc_mark)
5228 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5229
5230 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5231 }
5232 }
5233
5234 return rsec;
5235 }
5236
5237 /* Update the .got, .plt. and dynamic reloc reference counts for the
5238 section being removed. */
5239
5240 static bfd_boolean
5241 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5242 asection *sec, const Elf_Internal_Rela *relocs)
5243 {
5244 struct ppc_link_hash_table *htab;
5245 Elf_Internal_Shdr *symtab_hdr;
5246 struct elf_link_hash_entry **sym_hashes;
5247 struct got_entry **local_got_ents;
5248 const Elf_Internal_Rela *rel, *relend;
5249
5250 if ((sec->flags & SEC_ALLOC) == 0)
5251 return TRUE;
5252
5253 elf_section_data (sec)->local_dynrel = NULL;
5254
5255 htab = ppc_hash_table (info);
5256 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5257 sym_hashes = elf_sym_hashes (abfd);
5258 local_got_ents = elf_local_got_ents (abfd);
5259
5260 relend = relocs + sec->reloc_count;
5261 for (rel = relocs; rel < relend; rel++)
5262 {
5263 unsigned long r_symndx;
5264 enum elf_ppc64_reloc_type r_type;
5265 struct elf_link_hash_entry *h = NULL;
5266 char tls_type = 0;
5267
5268 r_symndx = ELF64_R_SYM (rel->r_info);
5269 r_type = ELF64_R_TYPE (rel->r_info);
5270 if (r_symndx >= symtab_hdr->sh_info)
5271 {
5272 struct ppc_link_hash_entry *eh;
5273 struct ppc_dyn_relocs **pp;
5274 struct ppc_dyn_relocs *p;
5275
5276 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5277 while (h->root.type == bfd_link_hash_indirect
5278 || h->root.type == bfd_link_hash_warning)
5279 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5280 eh = (struct ppc_link_hash_entry *) h;
5281
5282 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5283 if (p->sec == sec)
5284 {
5285 /* Everything must go for SEC. */
5286 *pp = p->next;
5287 break;
5288 }
5289 }
5290
5291 switch (r_type)
5292 {
5293 case R_PPC64_GOT_TLSLD16:
5294 case R_PPC64_GOT_TLSLD16_LO:
5295 case R_PPC64_GOT_TLSLD16_HI:
5296 case R_PPC64_GOT_TLSLD16_HA:
5297 ppc64_tlsld_got (abfd)->refcount -= 1;
5298 tls_type = TLS_TLS | TLS_LD;
5299 goto dogot;
5300
5301 case R_PPC64_GOT_TLSGD16:
5302 case R_PPC64_GOT_TLSGD16_LO:
5303 case R_PPC64_GOT_TLSGD16_HI:
5304 case R_PPC64_GOT_TLSGD16_HA:
5305 tls_type = TLS_TLS | TLS_GD;
5306 goto dogot;
5307
5308 case R_PPC64_GOT_TPREL16_DS:
5309 case R_PPC64_GOT_TPREL16_LO_DS:
5310 case R_PPC64_GOT_TPREL16_HI:
5311 case R_PPC64_GOT_TPREL16_HA:
5312 tls_type = TLS_TLS | TLS_TPREL;
5313 goto dogot;
5314
5315 case R_PPC64_GOT_DTPREL16_DS:
5316 case R_PPC64_GOT_DTPREL16_LO_DS:
5317 case R_PPC64_GOT_DTPREL16_HI:
5318 case R_PPC64_GOT_DTPREL16_HA:
5319 tls_type = TLS_TLS | TLS_DTPREL;
5320 goto dogot;
5321
5322 case R_PPC64_GOT16:
5323 case R_PPC64_GOT16_DS:
5324 case R_PPC64_GOT16_HA:
5325 case R_PPC64_GOT16_HI:
5326 case R_PPC64_GOT16_LO:
5327 case R_PPC64_GOT16_LO_DS:
5328 dogot:
5329 {
5330 struct got_entry *ent;
5331
5332 if (h != NULL)
5333 ent = h->got.glist;
5334 else
5335 ent = local_got_ents[r_symndx];
5336
5337 for (; ent != NULL; ent = ent->next)
5338 if (ent->addend == rel->r_addend
5339 && ent->owner == abfd
5340 && ent->tls_type == tls_type)
5341 break;
5342 if (ent == NULL)
5343 abort ();
5344 if (ent->got.refcount > 0)
5345 ent->got.refcount -= 1;
5346 }
5347 break;
5348
5349 case R_PPC64_PLT16_HA:
5350 case R_PPC64_PLT16_HI:
5351 case R_PPC64_PLT16_LO:
5352 case R_PPC64_PLT32:
5353 case R_PPC64_PLT64:
5354 case R_PPC64_REL14:
5355 case R_PPC64_REL14_BRNTAKEN:
5356 case R_PPC64_REL14_BRTAKEN:
5357 case R_PPC64_REL24:
5358 if (h != NULL)
5359 {
5360 struct plt_entry *ent;
5361
5362 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5363 if (ent->addend == rel->r_addend)
5364 break;
5365 if (ent == NULL)
5366 abort ();
5367 if (ent->plt.refcount > 0)
5368 ent->plt.refcount -= 1;
5369 }
5370 break;
5371
5372 default:
5373 break;
5374 }
5375 }
5376 return TRUE;
5377 }
5378
5379 /* The maximum size of .sfpr. */
5380 #define SFPR_MAX (218*4)
5381
5382 struct sfpr_def_parms
5383 {
5384 const char name[12];
5385 unsigned char lo, hi;
5386 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5387 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5388 };
5389
5390 /* Auto-generate _save*, _rest* functions in .sfpr. */
5391
5392 static unsigned int
5393 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5394 {
5395 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5396 unsigned int i;
5397 size_t len = strlen (parm->name);
5398 bfd_boolean writing = FALSE;
5399 char sym[16];
5400
5401 memcpy (sym, parm->name, len);
5402 sym[len + 2] = 0;
5403
5404 for (i = parm->lo; i <= parm->hi; i++)
5405 {
5406 struct elf_link_hash_entry *h;
5407
5408 sym[len + 0] = i / 10 + '0';
5409 sym[len + 1] = i % 10 + '0';
5410 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5411 if (h != NULL
5412 && !h->def_regular)
5413 {
5414 h->root.type = bfd_link_hash_defined;
5415 h->root.u.def.section = htab->sfpr;
5416 h->root.u.def.value = htab->sfpr->size;
5417 h->type = STT_FUNC;
5418 h->def_regular = 1;
5419 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5420 writing = TRUE;
5421 if (htab->sfpr->contents == NULL)
5422 {
5423 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5424 if (htab->sfpr->contents == NULL)
5425 return FALSE;
5426 }
5427 }
5428 if (writing)
5429 {
5430 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5431 if (i != parm->hi)
5432 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5433 else
5434 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5435 htab->sfpr->size = p - htab->sfpr->contents;
5436 }
5437 }
5438
5439 return TRUE;
5440 }
5441
5442 static bfd_byte *
5443 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5444 {
5445 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5446 return p + 4;
5447 }
5448
5449 static bfd_byte *
5450 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5451 {
5452 p = savegpr0 (abfd, p, r);
5453 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5454 p = p + 4;
5455 bfd_put_32 (abfd, BLR, p);
5456 return p + 4;
5457 }
5458
5459 static bfd_byte *
5460 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5461 {
5462 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5463 return p + 4;
5464 }
5465
5466 static bfd_byte *
5467 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5468 {
5469 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5470 p = p + 4;
5471 p = restgpr0 (abfd, p, r);
5472 bfd_put_32 (abfd, MTLR_R0, p);
5473 p = p + 4;
5474 if (r == 29)
5475 {
5476 p = restgpr0 (abfd, p, 30);
5477 p = restgpr0 (abfd, p, 31);
5478 }
5479 bfd_put_32 (abfd, BLR, p);
5480 return p + 4;
5481 }
5482
5483 static bfd_byte *
5484 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5485 {
5486 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5487 return p + 4;
5488 }
5489
5490 static bfd_byte *
5491 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5492 {
5493 p = savegpr1 (abfd, p, r);
5494 bfd_put_32 (abfd, BLR, p);
5495 return p + 4;
5496 }
5497
5498 static bfd_byte *
5499 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5500 {
5501 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5502 return p + 4;
5503 }
5504
5505 static bfd_byte *
5506 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5507 {
5508 p = restgpr1 (abfd, p, r);
5509 bfd_put_32 (abfd, BLR, p);
5510 return p + 4;
5511 }
5512
5513 static bfd_byte *
5514 savefpr (bfd *abfd, bfd_byte *p, int r)
5515 {
5516 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5517 return p + 4;
5518 }
5519
5520 static bfd_byte *
5521 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5522 {
5523 p = savefpr (abfd, p, r);
5524 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5525 p = p + 4;
5526 bfd_put_32 (abfd, BLR, p);
5527 return p + 4;
5528 }
5529
5530 static bfd_byte *
5531 restfpr (bfd *abfd, bfd_byte *p, int r)
5532 {
5533 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5534 return p + 4;
5535 }
5536
5537 static bfd_byte *
5538 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5539 {
5540 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5541 p = p + 4;
5542 p = restfpr (abfd, p, r);
5543 bfd_put_32 (abfd, MTLR_R0, p);
5544 p = p + 4;
5545 if (r == 29)
5546 {
5547 p = restfpr (abfd, p, 30);
5548 p = restfpr (abfd, p, 31);
5549 }
5550 bfd_put_32 (abfd, BLR, p);
5551 return p + 4;
5552 }
5553
5554 static bfd_byte *
5555 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5556 {
5557 p = savefpr (abfd, p, r);
5558 bfd_put_32 (abfd, BLR, p);
5559 return p + 4;
5560 }
5561
5562 static bfd_byte *
5563 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5564 {
5565 p = restfpr (abfd, p, r);
5566 bfd_put_32 (abfd, BLR, p);
5567 return p + 4;
5568 }
5569
5570 static bfd_byte *
5571 savevr (bfd *abfd, bfd_byte *p, int r)
5572 {
5573 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5574 p = p + 4;
5575 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5576 return p + 4;
5577 }
5578
5579 static bfd_byte *
5580 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5581 {
5582 p = savevr (abfd, p, r);
5583 bfd_put_32 (abfd, BLR, p);
5584 return p + 4;
5585 }
5586
5587 static bfd_byte *
5588 restvr (bfd *abfd, bfd_byte *p, int r)
5589 {
5590 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5591 p = p + 4;
5592 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5593 return p + 4;
5594 }
5595
5596 static bfd_byte *
5597 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5598 {
5599 p = restvr (abfd, p, r);
5600 bfd_put_32 (abfd, BLR, p);
5601 return p + 4;
5602 }
5603
5604 /* Called via elf_link_hash_traverse to transfer dynamic linking
5605 information on function code symbol entries to their corresponding
5606 function descriptor symbol entries. */
5607
5608 static bfd_boolean
5609 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5610 {
5611 struct bfd_link_info *info;
5612 struct ppc_link_hash_table *htab;
5613 struct plt_entry *ent;
5614 struct ppc_link_hash_entry *fh;
5615 struct ppc_link_hash_entry *fdh;
5616 bfd_boolean force_local;
5617
5618 fh = (struct ppc_link_hash_entry *) h;
5619 if (fh->elf.root.type == bfd_link_hash_indirect)
5620 return TRUE;
5621
5622 if (fh->elf.root.type == bfd_link_hash_warning)
5623 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5624
5625 info = inf;
5626 htab = ppc_hash_table (info);
5627
5628 /* Resolve undefined references to dot-symbols as the value
5629 in the function descriptor, if we have one in a regular object.
5630 This is to satisfy cases like ".quad .foo". Calls to functions
5631 in dynamic objects are handled elsewhere. */
5632 if (fh->elf.root.type == bfd_link_hash_undefweak
5633 && fh->was_undefined
5634 && (fh->oh->elf.root.type == bfd_link_hash_defined
5635 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5636 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5637 && opd_entry_value (fh->oh->elf.root.u.def.section,
5638 fh->oh->elf.root.u.def.value,
5639 &fh->elf.root.u.def.section,
5640 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5641 {
5642 fh->elf.root.type = fh->oh->elf.root.type;
5643 fh->elf.forced_local = 1;
5644 }
5645
5646 /* If this is a function code symbol, transfer dynamic linking
5647 information to the function descriptor symbol. */
5648 if (!fh->is_func)
5649 return TRUE;
5650
5651 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5652 if (ent->plt.refcount > 0)
5653 break;
5654 if (ent == NULL
5655 || fh->elf.root.root.string[0] != '.'
5656 || fh->elf.root.root.string[1] == '\0')
5657 return TRUE;
5658
5659 /* Find the corresponding function descriptor symbol. Create it
5660 as undefined if necessary. */
5661
5662 fdh = get_fdh (fh, htab);
5663 if (fdh != NULL)
5664 while (fdh->elf.root.type == bfd_link_hash_indirect
5665 || fdh->elf.root.type == bfd_link_hash_warning)
5666 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5667
5668 if (fdh == NULL
5669 && info->shared
5670 && (fh->elf.root.type == bfd_link_hash_undefined
5671 || fh->elf.root.type == bfd_link_hash_undefweak))
5672 {
5673 fdh = make_fdh (info, fh);
5674 if (fdh == NULL)
5675 return FALSE;
5676 }
5677
5678 /* Fake function descriptors are made undefweak. If the function
5679 code symbol is strong undefined, make the fake sym the same.
5680 If the function code symbol is defined, then force the fake
5681 descriptor local; We can't support overriding of symbols in a
5682 shared library on a fake descriptor. */
5683
5684 if (fdh != NULL
5685 && fdh->fake
5686 && fdh->elf.root.type == bfd_link_hash_undefweak)
5687 {
5688 if (fh->elf.root.type == bfd_link_hash_undefined)
5689 {
5690 fdh->elf.root.type = bfd_link_hash_undefined;
5691 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5692 }
5693 else if (fh->elf.root.type == bfd_link_hash_defined
5694 || fh->elf.root.type == bfd_link_hash_defweak)
5695 {
5696 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5697 }
5698 }
5699
5700 if (fdh != NULL
5701 && !fdh->elf.forced_local
5702 && (info->shared
5703 || fdh->elf.def_dynamic
5704 || fdh->elf.ref_dynamic
5705 || (fdh->elf.root.type == bfd_link_hash_undefweak
5706 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5707 {
5708 if (fdh->elf.dynindx == -1)
5709 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5710 return FALSE;
5711 fdh->elf.ref_regular |= fh->elf.ref_regular;
5712 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5713 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5714 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5715 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5716 {
5717 move_plt_plist (fh, fdh);
5718 fdh->elf.needs_plt = 1;
5719 }
5720 fdh->is_func_descriptor = 1;
5721 fdh->oh = fh;
5722 fh->oh = fdh;
5723 }
5724
5725 /* Now that the info is on the function descriptor, clear the
5726 function code sym info. Any function code syms for which we
5727 don't have a definition in a regular file, we force local.
5728 This prevents a shared library from exporting syms that have
5729 been imported from another library. Function code syms that
5730 are really in the library we must leave global to prevent the
5731 linker dragging in a definition from a static library. */
5732 force_local = (!fh->elf.def_regular
5733 || fdh == NULL
5734 || !fdh->elf.def_regular
5735 || fdh->elf.forced_local);
5736 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5737
5738 return TRUE;
5739 }
5740
5741 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5742 this hook to a) provide some gcc support functions, and b) transfer
5743 dynamic linking information gathered so far on function code symbol
5744 entries, to their corresponding function descriptor symbol entries. */
5745
5746 static bfd_boolean
5747 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5748 struct bfd_link_info *info)
5749 {
5750 struct ppc_link_hash_table *htab;
5751 unsigned int i;
5752 const struct sfpr_def_parms funcs[] =
5753 {
5754 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5755 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5756 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5757 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5758 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5759 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5760 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5761 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5762 { "._savef", 14, 31, savefpr, savefpr1_tail },
5763 { "._restf", 14, 31, restfpr, restfpr1_tail },
5764 { "_savevr_", 20, 31, savevr, savevr_tail },
5765 { "_restvr_", 20, 31, restvr, restvr_tail }
5766 };
5767
5768 htab = ppc_hash_table (info);
5769 if (htab->sfpr == NULL)
5770 /* We don't have any relocs. */
5771 return TRUE;
5772
5773 /* Provide any missing _save* and _rest* functions. */
5774 htab->sfpr->size = 0;
5775 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5776 if (!sfpr_define (info, &funcs[i]))
5777 return FALSE;
5778
5779 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5780
5781 if (htab->sfpr->size == 0)
5782 htab->sfpr->flags |= SEC_EXCLUDE;
5783
5784 return TRUE;
5785 }
5786
5787 /* Adjust a symbol defined by a dynamic object and referenced by a
5788 regular object. The current definition is in some section of the
5789 dynamic object, but we're not including those sections. We have to
5790 change the definition to something the rest of the link can
5791 understand. */
5792
5793 static bfd_boolean
5794 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5795 struct elf_link_hash_entry *h)
5796 {
5797 struct ppc_link_hash_table *htab;
5798 asection *s;
5799 unsigned int power_of_two;
5800
5801 htab = ppc_hash_table (info);
5802
5803 /* Deal with function syms. */
5804 if (h->type == STT_FUNC
5805 || h->needs_plt)
5806 {
5807 /* Clear procedure linkage table information for any symbol that
5808 won't need a .plt entry. */
5809 struct plt_entry *ent;
5810 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5811 if (ent->plt.refcount > 0)
5812 break;
5813 if (ent == NULL
5814 || SYMBOL_CALLS_LOCAL (info, h)
5815 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5816 && h->root.type == bfd_link_hash_undefweak))
5817 {
5818 h->plt.plist = NULL;
5819 h->needs_plt = 0;
5820 }
5821 }
5822 else
5823 h->plt.plist = NULL;
5824
5825 /* If this is a weak symbol, and there is a real definition, the
5826 processor independent code will have arranged for us to see the
5827 real definition first, and we can just use the same value. */
5828 if (h->u.weakdef != NULL)
5829 {
5830 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5831 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5832 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5833 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5834 if (ELIMINATE_COPY_RELOCS)
5835 h->non_got_ref = h->u.weakdef->non_got_ref;
5836 return TRUE;
5837 }
5838
5839 /* If we are creating a shared library, we must presume that the
5840 only references to the symbol are via the global offset table.
5841 For such cases we need not do anything here; the relocations will
5842 be handled correctly by relocate_section. */
5843 if (info->shared)
5844 return TRUE;
5845
5846 /* If there are no references to this symbol that do not use the
5847 GOT, we don't need to generate a copy reloc. */
5848 if (!h->non_got_ref)
5849 return TRUE;
5850
5851 if (ELIMINATE_COPY_RELOCS)
5852 {
5853 struct ppc_link_hash_entry * eh;
5854 struct ppc_dyn_relocs *p;
5855
5856 eh = (struct ppc_link_hash_entry *) h;
5857 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5858 {
5859 s = p->sec->output_section;
5860 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5861 break;
5862 }
5863
5864 /* If we didn't find any dynamic relocs in read-only sections, then
5865 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5866 if (p == NULL)
5867 {
5868 h->non_got_ref = 0;
5869 return TRUE;
5870 }
5871 }
5872
5873 if (h->plt.plist != NULL)
5874 {
5875 /* We should never get here, but unfortunately there are versions
5876 of gcc out there that improperly (for this ABI) put initialized
5877 function pointers, vtable refs and suchlike in read-only
5878 sections. Allow them to proceed, but warn that this might
5879 break at runtime. */
5880 (*_bfd_error_handler)
5881 (_("copy reloc against `%s' requires lazy plt linking; "
5882 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5883 h->root.root.string);
5884 }
5885
5886 /* This is a reference to a symbol defined by a dynamic object which
5887 is not a function. */
5888
5889 if (h->size == 0)
5890 {
5891 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5892 h->root.root.string);
5893 return TRUE;
5894 }
5895
5896 /* We must allocate the symbol in our .dynbss section, which will
5897 become part of the .bss section of the executable. There will be
5898 an entry for this symbol in the .dynsym section. The dynamic
5899 object will contain position independent code, so all references
5900 from the dynamic object to this symbol will go through the global
5901 offset table. The dynamic linker will use the .dynsym entry to
5902 determine the address it must put in the global offset table, so
5903 both the dynamic object and the regular object will refer to the
5904 same memory location for the variable. */
5905
5906 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5907 to copy the initial value out of the dynamic object and into the
5908 runtime process image. We need to remember the offset into the
5909 .rela.bss section we are going to use. */
5910 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5911 {
5912 htab->relbss->size += sizeof (Elf64_External_Rela);
5913 h->needs_copy = 1;
5914 }
5915
5916 /* We need to figure out the alignment required for this symbol. I
5917 have no idea how ELF linkers handle this. */
5918 power_of_two = bfd_log2 (h->size);
5919 if (power_of_two > 4)
5920 power_of_two = 4;
5921
5922 /* Apply the required alignment. */
5923 s = htab->dynbss;
5924 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5925 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5926 {
5927 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5928 return FALSE;
5929 }
5930
5931 /* Define the symbol as being at this point in the section. */
5932 h->root.u.def.section = s;
5933 h->root.u.def.value = s->size;
5934
5935 /* Increment the section size to make room for the symbol. */
5936 s->size += h->size;
5937
5938 return TRUE;
5939 }
5940
5941 /* If given a function descriptor symbol, hide both the function code
5942 sym and the descriptor. */
5943 static void
5944 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5945 struct elf_link_hash_entry *h,
5946 bfd_boolean force_local)
5947 {
5948 struct ppc_link_hash_entry *eh;
5949 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5950
5951 eh = (struct ppc_link_hash_entry *) h;
5952 if (eh->is_func_descriptor)
5953 {
5954 struct ppc_link_hash_entry *fh = eh->oh;
5955
5956 if (fh == NULL)
5957 {
5958 const char *p, *q;
5959 struct ppc_link_hash_table *htab;
5960 char save;
5961
5962 /* We aren't supposed to use alloca in BFD because on
5963 systems which do not have alloca the version in libiberty
5964 calls xmalloc, which might cause the program to crash
5965 when it runs out of memory. This function doesn't have a
5966 return status, so there's no way to gracefully return an
5967 error. So cheat. We know that string[-1] can be safely
5968 accessed; It's either a string in an ELF string table,
5969 or allocated in an objalloc structure. */
5970
5971 p = eh->elf.root.root.string - 1;
5972 save = *p;
5973 *(char *) p = '.';
5974 htab = ppc_hash_table (info);
5975 fh = (struct ppc_link_hash_entry *)
5976 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5977 *(char *) p = save;
5978
5979 /* Unfortunately, if it so happens that the string we were
5980 looking for was allocated immediately before this string,
5981 then we overwrote the string terminator. That's the only
5982 reason the lookup should fail. */
5983 if (fh == NULL)
5984 {
5985 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5986 while (q >= eh->elf.root.root.string && *q == *p)
5987 --q, --p;
5988 if (q < eh->elf.root.root.string && *p == '.')
5989 fh = (struct ppc_link_hash_entry *)
5990 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5991 }
5992 if (fh != NULL)
5993 {
5994 eh->oh = fh;
5995 fh->oh = eh;
5996 }
5997 }
5998 if (fh != NULL)
5999 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6000 }
6001 }
6002
6003 static bfd_boolean
6004 get_sym_h (struct elf_link_hash_entry **hp,
6005 Elf_Internal_Sym **symp,
6006 asection **symsecp,
6007 char **tls_maskp,
6008 Elf_Internal_Sym **locsymsp,
6009 unsigned long r_symndx,
6010 bfd *ibfd)
6011 {
6012 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6013
6014 if (r_symndx >= symtab_hdr->sh_info)
6015 {
6016 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6017 struct elf_link_hash_entry *h;
6018
6019 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6020 while (h->root.type == bfd_link_hash_indirect
6021 || h->root.type == bfd_link_hash_warning)
6022 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6023
6024 if (hp != NULL)
6025 *hp = h;
6026
6027 if (symp != NULL)
6028 *symp = NULL;
6029
6030 if (symsecp != NULL)
6031 {
6032 asection *symsec = NULL;
6033 if (h->root.type == bfd_link_hash_defined
6034 || h->root.type == bfd_link_hash_defweak)
6035 symsec = h->root.u.def.section;
6036 *symsecp = symsec;
6037 }
6038
6039 if (tls_maskp != NULL)
6040 {
6041 struct ppc_link_hash_entry *eh;
6042
6043 eh = (struct ppc_link_hash_entry *) h;
6044 *tls_maskp = &eh->tls_mask;
6045 }
6046 }
6047 else
6048 {
6049 Elf_Internal_Sym *sym;
6050 Elf_Internal_Sym *locsyms = *locsymsp;
6051
6052 if (locsyms == NULL)
6053 {
6054 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6055 if (locsyms == NULL)
6056 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6057 symtab_hdr->sh_info,
6058 0, NULL, NULL, NULL);
6059 if (locsyms == NULL)
6060 return FALSE;
6061 *locsymsp = locsyms;
6062 }
6063 sym = locsyms + r_symndx;
6064
6065 if (hp != NULL)
6066 *hp = NULL;
6067
6068 if (symp != NULL)
6069 *symp = sym;
6070
6071 if (symsecp != NULL)
6072 {
6073 asection *symsec = NULL;
6074 if ((sym->st_shndx != SHN_UNDEF
6075 && sym->st_shndx < SHN_LORESERVE)
6076 || sym->st_shndx > SHN_HIRESERVE)
6077 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6078 *symsecp = symsec;
6079 }
6080
6081 if (tls_maskp != NULL)
6082 {
6083 struct got_entry **lgot_ents;
6084 char *tls_mask;
6085
6086 tls_mask = NULL;
6087 lgot_ents = elf_local_got_ents (ibfd);
6088 if (lgot_ents != NULL)
6089 {
6090 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6091 tls_mask = &lgot_masks[r_symndx];
6092 }
6093 *tls_maskp = tls_mask;
6094 }
6095 }
6096 return TRUE;
6097 }
6098
6099 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6100 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6101 type suitable for optimization, and 1 otherwise. */
6102
6103 static int
6104 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6105 Elf_Internal_Sym **locsymsp,
6106 const Elf_Internal_Rela *rel, bfd *ibfd)
6107 {
6108 unsigned long r_symndx;
6109 int next_r;
6110 struct elf_link_hash_entry *h;
6111 Elf_Internal_Sym *sym;
6112 asection *sec;
6113 bfd_vma off;
6114
6115 r_symndx = ELF64_R_SYM (rel->r_info);
6116 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6117 return 0;
6118
6119 if ((*tls_maskp != NULL && **tls_maskp != 0)
6120 || sec == NULL
6121 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6122 return 1;
6123
6124 /* Look inside a TOC section too. */
6125 if (h != NULL)
6126 {
6127 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6128 off = h->root.u.def.value;
6129 }
6130 else
6131 off = sym->st_value;
6132 off += rel->r_addend;
6133 BFD_ASSERT (off % 8 == 0);
6134 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6135 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6136 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6137 return 0;
6138 if (toc_symndx != NULL)
6139 *toc_symndx = r_symndx;
6140 if ((h == NULL
6141 || ((h->root.type == bfd_link_hash_defined
6142 || h->root.type == bfd_link_hash_defweak)
6143 && !h->def_dynamic))
6144 && (next_r == -1 || next_r == -2))
6145 return 1 - next_r;
6146 return 1;
6147 }
6148
6149 /* Adjust all global syms defined in opd sections. In gcc generated
6150 code for the old ABI, these will already have been done. */
6151
6152 static bfd_boolean
6153 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6154 {
6155 struct ppc_link_hash_entry *eh;
6156 asection *sym_sec;
6157 long *opd_adjust;
6158
6159 if (h->root.type == bfd_link_hash_indirect)
6160 return TRUE;
6161
6162 if (h->root.type == bfd_link_hash_warning)
6163 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6164
6165 if (h->root.type != bfd_link_hash_defined
6166 && h->root.type != bfd_link_hash_defweak)
6167 return TRUE;
6168
6169 eh = (struct ppc_link_hash_entry *) h;
6170 if (eh->adjust_done)
6171 return TRUE;
6172
6173 sym_sec = eh->elf.root.u.def.section;
6174 opd_adjust = get_opd_info (sym_sec);
6175 if (opd_adjust != NULL)
6176 {
6177 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6178 if (adjust == -1)
6179 {
6180 /* This entry has been deleted. */
6181 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6182 if (dsec == NULL)
6183 {
6184 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6185 if (elf_discarded_section (dsec))
6186 {
6187 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6188 break;
6189 }
6190 }
6191 eh->elf.root.u.def.value = 0;
6192 eh->elf.root.u.def.section = dsec;
6193 }
6194 else
6195 eh->elf.root.u.def.value += adjust;
6196 eh->adjust_done = 1;
6197 }
6198 return TRUE;
6199 }
6200
6201 /* Handles decrementing dynamic reloc counts for the reloc specified by
6202 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6203 have already been determined. */
6204
6205 static bfd_boolean
6206 dec_dynrel_count (bfd_vma r_info,
6207 asection *sec,
6208 struct bfd_link_info *info,
6209 Elf_Internal_Sym **local_syms,
6210 struct elf_link_hash_entry *h,
6211 asection *sym_sec)
6212 {
6213 enum elf_ppc64_reloc_type r_type;
6214 struct ppc_dyn_relocs *p;
6215 struct ppc_dyn_relocs **pp;
6216
6217 /* Can this reloc be dynamic? This switch, and later tests here
6218 should be kept in sync with the code in check_relocs. */
6219 r_type = ELF64_R_TYPE (r_info);
6220 switch (r_type)
6221 {
6222 default:
6223 return TRUE;
6224
6225 case R_PPC64_TPREL16:
6226 case R_PPC64_TPREL16_LO:
6227 case R_PPC64_TPREL16_HI:
6228 case R_PPC64_TPREL16_HA:
6229 case R_PPC64_TPREL16_DS:
6230 case R_PPC64_TPREL16_LO_DS:
6231 case R_PPC64_TPREL16_HIGHER:
6232 case R_PPC64_TPREL16_HIGHERA:
6233 case R_PPC64_TPREL16_HIGHEST:
6234 case R_PPC64_TPREL16_HIGHESTA:
6235 if (!info->shared)
6236 return TRUE;
6237
6238 case R_PPC64_TPREL64:
6239 case R_PPC64_DTPMOD64:
6240 case R_PPC64_DTPREL64:
6241 case R_PPC64_ADDR64:
6242 case R_PPC64_REL30:
6243 case R_PPC64_REL32:
6244 case R_PPC64_REL64:
6245 case R_PPC64_ADDR14:
6246 case R_PPC64_ADDR14_BRNTAKEN:
6247 case R_PPC64_ADDR14_BRTAKEN:
6248 case R_PPC64_ADDR16:
6249 case R_PPC64_ADDR16_DS:
6250 case R_PPC64_ADDR16_HA:
6251 case R_PPC64_ADDR16_HI:
6252 case R_PPC64_ADDR16_HIGHER:
6253 case R_PPC64_ADDR16_HIGHERA:
6254 case R_PPC64_ADDR16_HIGHEST:
6255 case R_PPC64_ADDR16_HIGHESTA:
6256 case R_PPC64_ADDR16_LO:
6257 case R_PPC64_ADDR16_LO_DS:
6258 case R_PPC64_ADDR24:
6259 case R_PPC64_ADDR32:
6260 case R_PPC64_UADDR16:
6261 case R_PPC64_UADDR32:
6262 case R_PPC64_UADDR64:
6263 case R_PPC64_TOC:
6264 break;
6265 }
6266
6267 if (local_syms != NULL)
6268 {
6269 unsigned long r_symndx;
6270 Elf_Internal_Sym *sym;
6271 bfd *ibfd = sec->owner;
6272
6273 r_symndx = ELF64_R_SYM (r_info);
6274 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6275 return FALSE;
6276 }
6277
6278 if ((info->shared
6279 && (MUST_BE_DYN_RELOC (r_type)
6280 || (h != NULL
6281 && (!info->symbolic
6282 || h->root.type == bfd_link_hash_defweak
6283 || !h->def_regular))))
6284 || (ELIMINATE_COPY_RELOCS
6285 && !info->shared
6286 && h != NULL
6287 && (h->root.type == bfd_link_hash_defweak
6288 || !h->def_regular)))
6289 ;
6290 else
6291 return TRUE;
6292
6293 if (h != NULL)
6294 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6295 else
6296 {
6297 if (sym_sec != NULL)
6298 {
6299 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6300 pp = (struct ppc_dyn_relocs **) vpp;
6301 }
6302 else
6303 {
6304 void *vpp = &elf_section_data (sec)->local_dynrel;
6305 pp = (struct ppc_dyn_relocs **) vpp;
6306 }
6307
6308 /* elf_gc_sweep may have already removed all dyn relocs associated
6309 with local syms for a given section. Don't report a dynreloc
6310 miscount. */
6311 if (*pp == NULL)
6312 return TRUE;
6313 }
6314
6315 while ((p = *pp) != NULL)
6316 {
6317 if (p->sec == sec)
6318 {
6319 if (!MUST_BE_DYN_RELOC (r_type))
6320 p->pc_count -= 1;
6321 p->count -= 1;
6322 if (p->count == 0)
6323 *pp = p->next;
6324 return TRUE;
6325 }
6326 pp = &p->next;
6327 }
6328
6329 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6330 sec->owner, sec);
6331 bfd_set_error (bfd_error_bad_value);
6332 return FALSE;
6333 }
6334
6335 /* Remove unused Official Procedure Descriptor entries. Currently we
6336 only remove those associated with functions in discarded link-once
6337 sections, or weakly defined functions that have been overridden. It
6338 would be possible to remove many more entries for statically linked
6339 applications. */
6340
6341 bfd_boolean
6342 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6343 bfd_boolean no_opd_opt,
6344 bfd_boolean non_overlapping)
6345 {
6346 bfd *ibfd;
6347 bfd_boolean some_edited = FALSE;
6348 asection *need_pad = NULL;
6349
6350 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6351 {
6352 asection *sec;
6353 Elf_Internal_Rela *relstart, *rel, *relend;
6354 Elf_Internal_Shdr *symtab_hdr;
6355 Elf_Internal_Sym *local_syms;
6356 struct elf_link_hash_entry **sym_hashes;
6357 bfd_vma offset;
6358 bfd_size_type amt;
6359 long *opd_adjust;
6360 bfd_boolean need_edit, add_aux_fields;
6361 bfd_size_type cnt_16b = 0;
6362
6363 sec = bfd_get_section_by_name (ibfd, ".opd");
6364 if (sec == NULL || sec->size == 0)
6365 continue;
6366
6367 amt = sec->size * sizeof (long) / 8;
6368 opd_adjust = get_opd_info (sec);
6369 if (opd_adjust == NULL)
6370 {
6371 /* check_relocs hasn't been called. Must be a ld -r link
6372 or --just-symbols object. */
6373 opd_adjust = bfd_alloc (obfd, amt);
6374 if (opd_adjust == NULL)
6375 return FALSE;
6376 ppc64_elf_section_data (sec)->u.opd_adjust = opd_adjust;
6377 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
6378 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6379 }
6380 memset (opd_adjust, 0, amt);
6381
6382 if (no_opd_opt)
6383 continue;
6384
6385 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6386 continue;
6387
6388 if (sec->output_section == bfd_abs_section_ptr)
6389 continue;
6390
6391 /* Look through the section relocs. */
6392 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6393 continue;
6394
6395 local_syms = NULL;
6396 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6397 sym_hashes = elf_sym_hashes (ibfd);
6398
6399 /* Read the relocations. */
6400 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6401 info->keep_memory);
6402 if (relstart == NULL)
6403 return FALSE;
6404
6405 /* First run through the relocs to check they are sane, and to
6406 determine whether we need to edit this opd section. */
6407 need_edit = FALSE;
6408 need_pad = sec;
6409 offset = 0;
6410 relend = relstart + sec->reloc_count;
6411 for (rel = relstart; rel < relend; )
6412 {
6413 enum elf_ppc64_reloc_type r_type;
6414 unsigned long r_symndx;
6415 asection *sym_sec;
6416 struct elf_link_hash_entry *h;
6417 Elf_Internal_Sym *sym;
6418
6419 /* .opd contains a regular array of 16 or 24 byte entries. We're
6420 only interested in the reloc pointing to a function entry
6421 point. */
6422 if (rel->r_offset != offset
6423 || rel + 1 >= relend
6424 || (rel + 1)->r_offset != offset + 8)
6425 {
6426 /* If someone messes with .opd alignment then after a
6427 "ld -r" we might have padding in the middle of .opd.
6428 Also, there's nothing to prevent someone putting
6429 something silly in .opd with the assembler. No .opd
6430 optimization for them! */
6431 broken_opd:
6432 (*_bfd_error_handler)
6433 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6434 need_edit = FALSE;
6435 break;
6436 }
6437
6438 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6439 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6440 {
6441 (*_bfd_error_handler)
6442 (_("%B: unexpected reloc type %u in .opd section"),
6443 ibfd, r_type);
6444 need_edit = FALSE;
6445 break;
6446 }
6447
6448 r_symndx = ELF64_R_SYM (rel->r_info);
6449 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6450 r_symndx, ibfd))
6451 goto error_ret;
6452
6453 if (sym_sec == NULL || sym_sec->owner == NULL)
6454 {
6455 const char *sym_name;
6456 if (h != NULL)
6457 sym_name = h->root.root.string;
6458 else
6459 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6460 sym_sec);
6461
6462 (*_bfd_error_handler)
6463 (_("%B: undefined sym `%s' in .opd section"),
6464 ibfd, sym_name);
6465 need_edit = FALSE;
6466 break;
6467 }
6468
6469 /* opd entries are always for functions defined in the
6470 current input bfd. If the symbol isn't defined in the
6471 input bfd, then we won't be using the function in this
6472 bfd; It must be defined in a linkonce section in another
6473 bfd, or is weak. It's also possible that we are
6474 discarding the function due to a linker script /DISCARD/,
6475 which we test for via the output_section. */
6476 if (sym_sec->owner != ibfd
6477 || sym_sec->output_section == bfd_abs_section_ptr)
6478 need_edit = TRUE;
6479
6480 rel += 2;
6481 if (rel == relend
6482 || (rel + 1 == relend && rel->r_offset == offset + 16))
6483 {
6484 if (sec->size == offset + 24)
6485 {
6486 need_pad = NULL;
6487 break;
6488 }
6489 if (rel == relend && sec->size == offset + 16)
6490 {
6491 cnt_16b++;
6492 break;
6493 }
6494 goto broken_opd;
6495 }
6496
6497 if (rel->r_offset == offset + 24)
6498 offset += 24;
6499 else if (rel->r_offset != offset + 16)
6500 goto broken_opd;
6501 else if (rel + 1 < relend
6502 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6503 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6504 {
6505 offset += 16;
6506 cnt_16b++;
6507 }
6508 else if (rel + 2 < relend
6509 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6510 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6511 {
6512 offset += 24;
6513 rel += 1;
6514 }
6515 else
6516 goto broken_opd;
6517 }
6518
6519 add_aux_fields = non_overlapping && cnt_16b > 0;
6520
6521 if (need_edit || add_aux_fields)
6522 {
6523 Elf_Internal_Rela *write_rel;
6524 bfd_byte *rptr, *wptr;
6525 bfd_byte *new_contents = NULL;
6526 bfd_boolean skip;
6527 long opd_ent_size;
6528
6529 /* This seems a waste of time as input .opd sections are all
6530 zeros as generated by gcc, but I suppose there's no reason
6531 this will always be so. We might start putting something in
6532 the third word of .opd entries. */
6533 if ((sec->flags & SEC_IN_MEMORY) == 0)
6534 {
6535 bfd_byte *loc;
6536 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6537 {
6538 if (loc != NULL)
6539 free (loc);
6540 error_ret:
6541 if (local_syms != NULL
6542 && symtab_hdr->contents != (unsigned char *) local_syms)
6543 free (local_syms);
6544 if (elf_section_data (sec)->relocs != relstart)
6545 free (relstart);
6546 return FALSE;
6547 }
6548 sec->contents = loc;
6549 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6550 }
6551
6552 elf_section_data (sec)->relocs = relstart;
6553
6554 new_contents = sec->contents;
6555 if (add_aux_fields)
6556 {
6557 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6558 if (new_contents == NULL)
6559 return FALSE;
6560 need_pad = FALSE;
6561 }
6562 wptr = new_contents;
6563 rptr = sec->contents;
6564
6565 write_rel = relstart;
6566 skip = FALSE;
6567 offset = 0;
6568 opd_ent_size = 0;
6569 for (rel = relstart; rel < relend; rel++)
6570 {
6571 unsigned long r_symndx;
6572 asection *sym_sec;
6573 struct elf_link_hash_entry *h;
6574 Elf_Internal_Sym *sym;
6575
6576 r_symndx = ELF64_R_SYM (rel->r_info);
6577 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6578 r_symndx, ibfd))
6579 goto error_ret;
6580
6581 if (rel->r_offset == offset)
6582 {
6583 struct ppc_link_hash_entry *fdh = NULL;
6584
6585 /* See if the .opd entry is full 24 byte or
6586 16 byte (with fd_aux entry overlapped with next
6587 fd_func). */
6588 opd_ent_size = 24;
6589 if ((rel + 2 == relend && sec->size == offset + 16)
6590 || (rel + 3 < relend
6591 && rel[2].r_offset == offset + 16
6592 && rel[3].r_offset == offset + 24
6593 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6594 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6595 opd_ent_size = 16;
6596
6597 if (h != NULL
6598 && h->root.root.string[0] == '.')
6599 {
6600 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6601 ppc_hash_table (info));
6602 if (fdh != NULL
6603 && fdh->elf.root.type != bfd_link_hash_defined
6604 && fdh->elf.root.type != bfd_link_hash_defweak)
6605 fdh = NULL;
6606 }
6607
6608 skip = (sym_sec->owner != ibfd
6609 || sym_sec->output_section == bfd_abs_section_ptr);
6610 if (skip)
6611 {
6612 if (fdh != NULL && sym_sec->owner == ibfd)
6613 {
6614 /* Arrange for the function descriptor sym
6615 to be dropped. */
6616 fdh->elf.root.u.def.value = 0;
6617 fdh->elf.root.u.def.section = sym_sec;
6618 }
6619 opd_adjust[rel->r_offset / 8] = -1;
6620 }
6621 else
6622 {
6623 /* We'll be keeping this opd entry. */
6624
6625 if (fdh != NULL)
6626 {
6627 /* Redefine the function descriptor symbol to
6628 this location in the opd section. It is
6629 necessary to update the value here rather
6630 than using an array of adjustments as we do
6631 for local symbols, because various places
6632 in the generic ELF code use the value
6633 stored in u.def.value. */
6634 fdh->elf.root.u.def.value = wptr - new_contents;
6635 fdh->adjust_done = 1;
6636 }
6637
6638 /* Local syms are a bit tricky. We could
6639 tweak them as they can be cached, but
6640 we'd need to look through the local syms
6641 for the function descriptor sym which we
6642 don't have at the moment. So keep an
6643 array of adjustments. */
6644 opd_adjust[rel->r_offset / 8]
6645 = (wptr - new_contents) - (rptr - sec->contents);
6646
6647 if (wptr != rptr)
6648 memcpy (wptr, rptr, opd_ent_size);
6649 wptr += opd_ent_size;
6650 if (add_aux_fields && opd_ent_size == 16)
6651 {
6652 memset (wptr, '\0', 8);
6653 wptr += 8;
6654 }
6655 }
6656 rptr += opd_ent_size;
6657 offset += opd_ent_size;
6658 }
6659
6660 if (skip)
6661 {
6662 if (!NO_OPD_RELOCS
6663 && !info->relocatable
6664 && !dec_dynrel_count (rel->r_info, sec, info,
6665 NULL, h, sym_sec))
6666 goto error_ret;
6667 }
6668 else
6669 {
6670 /* We need to adjust any reloc offsets to point to the
6671 new opd entries. While we're at it, we may as well
6672 remove redundant relocs. */
6673 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6674 if (write_rel != rel)
6675 memcpy (write_rel, rel, sizeof (*rel));
6676 ++write_rel;
6677 }
6678 }
6679
6680 sec->size = wptr - new_contents;
6681 sec->reloc_count = write_rel - relstart;
6682 if (add_aux_fields)
6683 {
6684 free (sec->contents);
6685 sec->contents = new_contents;
6686 }
6687
6688 /* Fudge the header size too, as this is used later in
6689 elf_bfd_final_link if we are emitting relocs. */
6690 elf_section_data (sec)->rel_hdr.sh_size
6691 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6692 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6693 some_edited = TRUE;
6694 }
6695 else if (elf_section_data (sec)->relocs != relstart)
6696 free (relstart);
6697
6698 if (local_syms != NULL
6699 && symtab_hdr->contents != (unsigned char *) local_syms)
6700 {
6701 if (!info->keep_memory)
6702 free (local_syms);
6703 else
6704 symtab_hdr->contents = (unsigned char *) local_syms;
6705 }
6706 }
6707
6708 if (some_edited)
6709 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6710
6711 /* If we are doing a final link and the last .opd entry is just 16 byte
6712 long, add a 8 byte padding after it. */
6713 if (need_pad != NULL && !info->relocatable)
6714 {
6715 bfd_byte *p;
6716
6717 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6718 {
6719 BFD_ASSERT (need_pad->size > 0);
6720
6721 p = bfd_malloc (need_pad->size + 8);
6722 if (p == NULL)
6723 return FALSE;
6724
6725 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6726 p, 0, need_pad->size))
6727 return FALSE;
6728
6729 need_pad->contents = p;
6730 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6731 }
6732 else
6733 {
6734 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6735 if (p == NULL)
6736 return FALSE;
6737
6738 need_pad->contents = p;
6739 }
6740
6741 memset (need_pad->contents + need_pad->size, 0, 8);
6742 need_pad->size += 8;
6743 }
6744
6745 return TRUE;
6746 }
6747
6748 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6749
6750 asection *
6751 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6752 {
6753 struct ppc_link_hash_table *htab;
6754
6755 htab = ppc_hash_table (info);
6756 if (htab->tls_get_addr != NULL)
6757 {
6758 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6759
6760 while (h->elf.root.type == bfd_link_hash_indirect
6761 || h->elf.root.type == bfd_link_hash_warning)
6762 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6763
6764 htab->tls_get_addr = h;
6765
6766 if (htab->tls_get_addr_fd == NULL
6767 && h->oh != NULL
6768 && h->oh->is_func_descriptor
6769 && (h->oh->elf.root.type == bfd_link_hash_defined
6770 || h->oh->elf.root.type == bfd_link_hash_defweak))
6771 htab->tls_get_addr_fd = h->oh;
6772 }
6773
6774 if (htab->tls_get_addr_fd != NULL)
6775 {
6776 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6777
6778 while (h->elf.root.type == bfd_link_hash_indirect
6779 || h->elf.root.type == bfd_link_hash_warning)
6780 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6781
6782 htab->tls_get_addr_fd = h;
6783 }
6784
6785 return _bfd_elf_tls_setup (obfd, info);
6786 }
6787
6788 /* Run through all the TLS relocs looking for optimization
6789 opportunities. The linker has been hacked (see ppc64elf.em) to do
6790 a preliminary section layout so that we know the TLS segment
6791 offsets. We can't optimize earlier because some optimizations need
6792 to know the tp offset, and we need to optimize before allocating
6793 dynamic relocations. */
6794
6795 bfd_boolean
6796 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6797 {
6798 bfd *ibfd;
6799 asection *sec;
6800 struct ppc_link_hash_table *htab;
6801
6802 if (info->relocatable || info->shared)
6803 return TRUE;
6804
6805 htab = ppc_hash_table (info);
6806 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6807 {
6808 Elf_Internal_Sym *locsyms = NULL;
6809 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6810 unsigned char *toc_ref = NULL;
6811
6812 /* Look at all the sections for this file, with TOC last. */
6813 for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next
6814 : ibfd->sections);
6815 sec != NULL;
6816 sec = (sec == toc ? NULL
6817 : sec->next == NULL ? toc
6818 : sec->next == toc && toc->next ? toc->next
6819 : sec->next))
6820 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6821 {
6822 Elf_Internal_Rela *relstart, *rel, *relend;
6823 int expecting_tls_get_addr;
6824 long toc_ref_index = 0;
6825
6826 /* Read the relocations. */
6827 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6828 info->keep_memory);
6829 if (relstart == NULL)
6830 return FALSE;
6831
6832 expecting_tls_get_addr = 0;
6833 relend = relstart + sec->reloc_count;
6834 for (rel = relstart; rel < relend; rel++)
6835 {
6836 enum elf_ppc64_reloc_type r_type;
6837 unsigned long r_symndx;
6838 struct elf_link_hash_entry *h;
6839 Elf_Internal_Sym *sym;
6840 asection *sym_sec;
6841 char *tls_mask;
6842 char tls_set, tls_clear, tls_type = 0;
6843 bfd_vma value;
6844 bfd_boolean ok_tprel, is_local;
6845
6846 r_symndx = ELF64_R_SYM (rel->r_info);
6847 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6848 r_symndx, ibfd))
6849 {
6850 err_free_rel:
6851 if (elf_section_data (sec)->relocs != relstart)
6852 free (relstart);
6853 if (toc_ref != NULL)
6854 free (toc_ref);
6855 if (locsyms != NULL
6856 && (elf_tdata (ibfd)->symtab_hdr.contents
6857 != (unsigned char *) locsyms))
6858 free (locsyms);
6859 return FALSE;
6860 }
6861
6862 if (h != NULL)
6863 {
6864 if (h->root.type != bfd_link_hash_defined
6865 && h->root.type != bfd_link_hash_defweak)
6866 continue;
6867 value = h->root.u.def.value;
6868 }
6869 else
6870 /* Symbols referenced by TLS relocs must be of type
6871 STT_TLS. So no need for .opd local sym adjust. */
6872 value = sym->st_value;
6873
6874 ok_tprel = FALSE;
6875 is_local = FALSE;
6876 if (h == NULL
6877 || !h->def_dynamic)
6878 {
6879 is_local = TRUE;
6880 value += sym_sec->output_offset;
6881 value += sym_sec->output_section->vma;
6882 value -= htab->elf.tls_sec->vma;
6883 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6884 < (bfd_vma) 1 << 32);
6885 }
6886
6887 r_type = ELF64_R_TYPE (rel->r_info);
6888 switch (r_type)
6889 {
6890 case R_PPC64_GOT_TLSLD16:
6891 case R_PPC64_GOT_TLSLD16_LO:
6892 case R_PPC64_GOT_TLSLD16_HI:
6893 case R_PPC64_GOT_TLSLD16_HA:
6894 /* These relocs should never be against a symbol
6895 defined in a shared lib. Leave them alone if
6896 that turns out to be the case. */
6897 ppc64_tlsld_got (ibfd)->refcount -= 1;
6898 if (!is_local)
6899 continue;
6900
6901 /* LD -> LE */
6902 tls_set = 0;
6903 tls_clear = TLS_LD;
6904 tls_type = TLS_TLS | TLS_LD;
6905 expecting_tls_get_addr = 1;
6906 break;
6907
6908 case R_PPC64_GOT_TLSGD16:
6909 case R_PPC64_GOT_TLSGD16_LO:
6910 case R_PPC64_GOT_TLSGD16_HI:
6911 case R_PPC64_GOT_TLSGD16_HA:
6912 if (ok_tprel)
6913 /* GD -> LE */
6914 tls_set = 0;
6915 else
6916 /* GD -> IE */
6917 tls_set = TLS_TLS | TLS_TPRELGD;
6918 tls_clear = TLS_GD;
6919 tls_type = TLS_TLS | TLS_GD;
6920 expecting_tls_get_addr = 1;
6921 break;
6922
6923 case R_PPC64_GOT_TPREL16_DS:
6924 case R_PPC64_GOT_TPREL16_LO_DS:
6925 case R_PPC64_GOT_TPREL16_HI:
6926 case R_PPC64_GOT_TPREL16_HA:
6927 expecting_tls_get_addr = 0;
6928 if (ok_tprel)
6929 {
6930 /* IE -> LE */
6931 tls_set = 0;
6932 tls_clear = TLS_TPREL;
6933 tls_type = TLS_TLS | TLS_TPREL;
6934 break;
6935 }
6936 else
6937 continue;
6938
6939 case R_PPC64_REL14:
6940 case R_PPC64_REL14_BRTAKEN:
6941 case R_PPC64_REL14_BRNTAKEN:
6942 case R_PPC64_REL24:
6943 if (h != NULL
6944 && (h == &htab->tls_get_addr->elf
6945 || h == &htab->tls_get_addr_fd->elf))
6946 {
6947 if (!expecting_tls_get_addr
6948 && rel != relstart
6949 && ((ELF64_R_TYPE (rel[-1].r_info)
6950 == R_PPC64_TOC16)
6951 || (ELF64_R_TYPE (rel[-1].r_info)
6952 == R_PPC64_TOC16_LO)))
6953 {
6954 /* Check for toc tls entries. */
6955 char *toc_tls;
6956 int retval;
6957
6958 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6959 rel - 1, ibfd);
6960 if (retval == 0)
6961 goto err_free_rel;
6962 if (retval > 1 && toc_tls != NULL)
6963 {
6964 expecting_tls_get_addr = 1;
6965 if (toc_ref != NULL)
6966 toc_ref[toc_ref_index] = 1;
6967 }
6968 }
6969
6970 if (expecting_tls_get_addr)
6971 {
6972 struct plt_entry *ent;
6973 for (ent = h->plt.plist; ent; ent = ent->next)
6974 if (ent->addend == 0)
6975 {
6976 if (ent->plt.refcount > 0)
6977 ent->plt.refcount -= 1;
6978 break;
6979 }
6980 }
6981 }
6982 expecting_tls_get_addr = 0;
6983 continue;
6984
6985 case R_PPC64_TOC16:
6986 case R_PPC64_TOC16_LO:
6987 case R_PPC64_TLS:
6988 expecting_tls_get_addr = 0;
6989 if (sym_sec == toc && toc != NULL)
6990 {
6991 /* Mark this toc entry as referenced by a TLS
6992 code sequence. We can do that now in the
6993 case of R_PPC64_TLS, and after checking for
6994 tls_get_addr for the TOC16 relocs. */
6995 if (toc_ref == NULL)
6996 {
6997 toc_ref = bfd_zmalloc (toc->size / 8);
6998 if (toc_ref == NULL)
6999 goto err_free_rel;
7000 }
7001 if (h != NULL)
7002 value = h->root.u.def.value;
7003 else
7004 value = sym->st_value;
7005 value += rel->r_addend;
7006 BFD_ASSERT (value < toc->size && value % 8 == 0);
7007 toc_ref_index = value / 8;
7008 if (r_type == R_PPC64_TLS)
7009 toc_ref[toc_ref_index] = 1;
7010 }
7011 continue;
7012
7013 case R_PPC64_TPREL64:
7014 expecting_tls_get_addr = 0;
7015 if (sec != toc
7016 || toc_ref == NULL
7017 || !toc_ref[rel->r_offset / 8])
7018 continue;
7019 if (ok_tprel)
7020 {
7021 /* IE -> LE */
7022 tls_set = TLS_EXPLICIT;
7023 tls_clear = TLS_TPREL;
7024 break;
7025 }
7026 else
7027 continue;
7028
7029 case R_PPC64_DTPMOD64:
7030 expecting_tls_get_addr = 0;
7031 if (sec != toc
7032 || toc_ref == NULL
7033 || !toc_ref[rel->r_offset / 8])
7034 continue;
7035 if (rel + 1 < relend
7036 && (rel[1].r_info
7037 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7038 && rel[1].r_offset == rel->r_offset + 8)
7039 {
7040 if (ok_tprel)
7041 /* GD -> LE */
7042 tls_set = TLS_EXPLICIT | TLS_GD;
7043 else
7044 /* GD -> IE */
7045 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7046 tls_clear = TLS_GD;
7047 }
7048 else
7049 {
7050 if (!is_local)
7051 continue;
7052
7053 /* LD -> LE */
7054 tls_set = TLS_EXPLICIT;
7055 tls_clear = TLS_LD;
7056 }
7057 break;
7058
7059 default:
7060 expecting_tls_get_addr = 0;
7061 continue;
7062 }
7063
7064 if ((tls_set & TLS_EXPLICIT) == 0)
7065 {
7066 struct got_entry *ent;
7067
7068 /* Adjust got entry for this reloc. */
7069 if (h != NULL)
7070 ent = h->got.glist;
7071 else
7072 ent = elf_local_got_ents (ibfd)[r_symndx];
7073
7074 for (; ent != NULL; ent = ent->next)
7075 if (ent->addend == rel->r_addend
7076 && ent->owner == ibfd
7077 && ent->tls_type == tls_type)
7078 break;
7079 if (ent == NULL)
7080 abort ();
7081
7082 if (tls_set == 0)
7083 {
7084 /* We managed to get rid of a got entry. */
7085 if (ent->got.refcount > 0)
7086 ent->got.refcount -= 1;
7087 }
7088 }
7089 else
7090 {
7091 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7092 we'll lose one or two dyn relocs. */
7093 if (!dec_dynrel_count (rel->r_info, sec, info,
7094 NULL, h, sym_sec))
7095 return FALSE;
7096
7097 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7098 {
7099 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7100 NULL, h, sym_sec))
7101 return FALSE;
7102 }
7103 }
7104
7105 *tls_mask |= tls_set;
7106 *tls_mask &= ~tls_clear;
7107 }
7108
7109 if (elf_section_data (sec)->relocs != relstart)
7110 free (relstart);
7111 }
7112
7113 if (toc_ref != NULL)
7114 free (toc_ref);
7115
7116 if (locsyms != NULL
7117 && (elf_tdata (ibfd)->symtab_hdr.contents
7118 != (unsigned char *) locsyms))
7119 {
7120 if (!info->keep_memory)
7121 free (locsyms);
7122 else
7123 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7124 }
7125 }
7126 return TRUE;
7127 }
7128
7129 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7130 the values of any global symbols in a toc section that has been
7131 edited. Globals in toc sections should be a rarity, so this function
7132 sets a flag if any are found in toc sections other than the one just
7133 edited, so that futher hash table traversals can be avoided. */
7134
7135 struct adjust_toc_info
7136 {
7137 asection *toc;
7138 unsigned long *skip;
7139 bfd_boolean global_toc_syms;
7140 };
7141
7142 static bfd_boolean
7143 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7144 {
7145 struct ppc_link_hash_entry *eh;
7146 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7147
7148 if (h->root.type == bfd_link_hash_indirect)
7149 return TRUE;
7150
7151 if (h->root.type == bfd_link_hash_warning)
7152 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7153
7154 if (h->root.type != bfd_link_hash_defined
7155 && h->root.type != bfd_link_hash_defweak)
7156 return TRUE;
7157
7158 eh = (struct ppc_link_hash_entry *) h;
7159 if (eh->adjust_done)
7160 return TRUE;
7161
7162 if (eh->elf.root.u.def.section == toc_inf->toc)
7163 {
7164 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7165 if (skip != (unsigned long) -1)
7166 eh->elf.root.u.def.value -= skip;
7167 else
7168 {
7169 (*_bfd_error_handler)
7170 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7171 eh->elf.root.u.def.section = &bfd_abs_section;
7172 eh->elf.root.u.def.value = 0;
7173 }
7174 eh->adjust_done = 1;
7175 }
7176 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7177 toc_inf->global_toc_syms = TRUE;
7178
7179 return TRUE;
7180 }
7181
7182 /* Examine all relocs referencing .toc sections in order to remove
7183 unused .toc entries. */
7184
7185 bfd_boolean
7186 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7187 {
7188 bfd *ibfd;
7189 struct adjust_toc_info toc_inf;
7190
7191 toc_inf.global_toc_syms = TRUE;
7192 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7193 {
7194 asection *toc, *sec;
7195 Elf_Internal_Shdr *symtab_hdr;
7196 Elf_Internal_Sym *local_syms;
7197 struct elf_link_hash_entry **sym_hashes;
7198 Elf_Internal_Rela *relstart, *rel;
7199 unsigned long *skip, *drop;
7200 unsigned char *used;
7201 unsigned char *keep, last, some_unused;
7202
7203 toc = bfd_get_section_by_name (ibfd, ".toc");
7204 if (toc == NULL
7205 || toc->size == 0
7206 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7207 || elf_discarded_section (toc))
7208 continue;
7209
7210 local_syms = NULL;
7211 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7212 sym_hashes = elf_sym_hashes (ibfd);
7213
7214 /* Look at sections dropped from the final link. */
7215 skip = NULL;
7216 relstart = NULL;
7217 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7218 {
7219 if (sec->reloc_count == 0
7220 || !elf_discarded_section (sec)
7221 || get_opd_info (sec)
7222 || (sec->flags & SEC_ALLOC) == 0
7223 || (sec->flags & SEC_DEBUGGING) != 0)
7224 continue;
7225
7226 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7227 if (relstart == NULL)
7228 goto error_ret;
7229
7230 /* Run through the relocs to see which toc entries might be
7231 unused. */
7232 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7233 {
7234 enum elf_ppc64_reloc_type r_type;
7235 unsigned long r_symndx;
7236 asection *sym_sec;
7237 struct elf_link_hash_entry *h;
7238 Elf_Internal_Sym *sym;
7239 bfd_vma val;
7240
7241 r_type = ELF64_R_TYPE (rel->r_info);
7242 switch (r_type)
7243 {
7244 default:
7245 continue;
7246
7247 case R_PPC64_TOC16:
7248 case R_PPC64_TOC16_LO:
7249 case R_PPC64_TOC16_HI:
7250 case R_PPC64_TOC16_HA:
7251 case R_PPC64_TOC16_DS:
7252 case R_PPC64_TOC16_LO_DS:
7253 break;
7254 }
7255
7256 r_symndx = ELF64_R_SYM (rel->r_info);
7257 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7258 r_symndx, ibfd))
7259 goto error_ret;
7260
7261 if (sym_sec != toc)
7262 continue;
7263
7264 if (h != NULL)
7265 val = h->root.u.def.value;
7266 else
7267 val = sym->st_value;
7268 val += rel->r_addend;
7269
7270 if (val >= toc->size)
7271 continue;
7272
7273 /* Anything in the toc ought to be aligned to 8 bytes.
7274 If not, don't mark as unused. */
7275 if (val & 7)
7276 continue;
7277
7278 if (skip == NULL)
7279 {
7280 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7281 if (skip == NULL)
7282 goto error_ret;
7283 }
7284
7285 skip[val >> 3] = 1;
7286 }
7287
7288 if (elf_section_data (sec)->relocs != relstart)
7289 free (relstart);
7290 }
7291
7292 if (skip == NULL)
7293 continue;
7294
7295 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7296 if (used == NULL)
7297 {
7298 error_ret:
7299 if (local_syms != NULL
7300 && symtab_hdr->contents != (unsigned char *) local_syms)
7301 free (local_syms);
7302 if (sec != NULL
7303 && relstart != NULL
7304 && elf_section_data (sec)->relocs != relstart)
7305 free (relstart);
7306 if (skip != NULL)
7307 free (skip);
7308 return FALSE;
7309 }
7310
7311 /* Now check all kept sections that might reference the toc.
7312 Check the toc itself last. */
7313 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7314 : ibfd->sections);
7315 sec != NULL;
7316 sec = (sec == toc ? NULL
7317 : sec->next == NULL ? toc
7318 : sec->next == toc && toc->next ? toc->next
7319 : sec->next))
7320 {
7321 int repeat;
7322
7323 if (sec->reloc_count == 0
7324 || elf_discarded_section (sec)
7325 || get_opd_info (sec)
7326 || (sec->flags & SEC_ALLOC) == 0
7327 || (sec->flags & SEC_DEBUGGING) != 0)
7328 continue;
7329
7330 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7331 if (relstart == NULL)
7332 goto error_ret;
7333
7334 /* Mark toc entries referenced as used. */
7335 repeat = 0;
7336 do
7337 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7338 {
7339 enum elf_ppc64_reloc_type r_type;
7340 unsigned long r_symndx;
7341 asection *sym_sec;
7342 struct elf_link_hash_entry *h;
7343 Elf_Internal_Sym *sym;
7344 bfd_vma val;
7345
7346 r_type = ELF64_R_TYPE (rel->r_info);
7347 switch (r_type)
7348 {
7349 case R_PPC64_TOC16:
7350 case R_PPC64_TOC16_LO:
7351 case R_PPC64_TOC16_HI:
7352 case R_PPC64_TOC16_HA:
7353 case R_PPC64_TOC16_DS:
7354 case R_PPC64_TOC16_LO_DS:
7355 /* In case we're taking addresses of toc entries. */
7356 case R_PPC64_ADDR64:
7357 break;
7358
7359 default:
7360 continue;
7361 }
7362
7363 r_symndx = ELF64_R_SYM (rel->r_info);
7364 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7365 r_symndx, ibfd))
7366 {
7367 free (used);
7368 goto error_ret;
7369 }
7370
7371 if (sym_sec != toc)
7372 continue;
7373
7374 if (h != NULL)
7375 val = h->root.u.def.value;
7376 else
7377 val = sym->st_value;
7378 val += rel->r_addend;
7379
7380 if (val >= toc->size)
7381 continue;
7382
7383 /* For the toc section, we only mark as used if
7384 this entry itself isn't unused. */
7385 if (sec == toc
7386 && !used[val >> 3]
7387 && (used[rel->r_offset >> 3]
7388 || !skip[rel->r_offset >> 3]))
7389 /* Do all the relocs again, to catch reference
7390 chains. */
7391 repeat = 1;
7392
7393 used[val >> 3] = 1;
7394 }
7395 while (repeat);
7396 }
7397
7398 /* Merge the used and skip arrays. Assume that TOC
7399 doublewords not appearing as either used or unused belong
7400 to to an entry more than one doubleword in size. */
7401 for (drop = skip, keep = used, last = 0, some_unused = 0;
7402 drop < skip + (toc->size + 7) / 8;
7403 ++drop, ++keep)
7404 {
7405 if (*keep)
7406 {
7407 *drop = 0;
7408 last = 0;
7409 }
7410 else if (*drop)
7411 {
7412 some_unused = 1;
7413 last = 1;
7414 }
7415 else
7416 *drop = last;
7417 }
7418
7419 free (used);
7420
7421 if (some_unused)
7422 {
7423 bfd_byte *contents, *src;
7424 unsigned long off;
7425
7426 /* Shuffle the toc contents, and at the same time convert the
7427 skip array from booleans into offsets. */
7428 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7429 goto error_ret;
7430
7431 elf_section_data (toc)->this_hdr.contents = contents;
7432
7433 for (src = contents, off = 0, drop = skip;
7434 src < contents + toc->size;
7435 src += 8, ++drop)
7436 {
7437 if (*drop)
7438 {
7439 *drop = (unsigned long) -1;
7440 off += 8;
7441 }
7442 else if (off != 0)
7443 {
7444 *drop = off;
7445 memcpy (src - off, src, 8);
7446 }
7447 }
7448 toc->rawsize = toc->size;
7449 toc->size = src - contents - off;
7450
7451 if (toc->reloc_count != 0)
7452 {
7453 Elf_Internal_Rela *wrel;
7454 bfd_size_type sz;
7455
7456 /* Read toc relocs. */
7457 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7458 TRUE);
7459 if (relstart == NULL)
7460 goto error_ret;
7461
7462 /* Remove unused toc relocs, and adjust those we keep. */
7463 wrel = relstart;
7464 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7465 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7466 {
7467 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7468 wrel->r_info = rel->r_info;
7469 wrel->r_addend = rel->r_addend;
7470 ++wrel;
7471 }
7472 else if (!dec_dynrel_count (rel->r_info, toc, info,
7473 &local_syms, NULL, NULL))
7474 goto error_ret;
7475
7476 toc->reloc_count = wrel - relstart;
7477 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7478 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7479 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7480 }
7481
7482 /* Adjust addends for relocs against the toc section sym. */
7483 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7484 {
7485 if (sec->reloc_count == 0
7486 || elf_discarded_section (sec))
7487 continue;
7488
7489 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7490 TRUE);
7491 if (relstart == NULL)
7492 goto error_ret;
7493
7494 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7495 {
7496 enum elf_ppc64_reloc_type r_type;
7497 unsigned long r_symndx;
7498 asection *sym_sec;
7499 struct elf_link_hash_entry *h;
7500 Elf_Internal_Sym *sym;
7501
7502 r_type = ELF64_R_TYPE (rel->r_info);
7503 switch (r_type)
7504 {
7505 default:
7506 continue;
7507
7508 case R_PPC64_TOC16:
7509 case R_PPC64_TOC16_LO:
7510 case R_PPC64_TOC16_HI:
7511 case R_PPC64_TOC16_HA:
7512 case R_PPC64_TOC16_DS:
7513 case R_PPC64_TOC16_LO_DS:
7514 case R_PPC64_ADDR64:
7515 break;
7516 }
7517
7518 r_symndx = ELF64_R_SYM (rel->r_info);
7519 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7520 r_symndx, ibfd))
7521 goto error_ret;
7522
7523 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7524 continue;
7525
7526 rel->r_addend -= skip[rel->r_addend >> 3];
7527 }
7528 }
7529
7530 /* We shouldn't have local or global symbols defined in the TOC,
7531 but handle them anyway. */
7532 if (local_syms != NULL)
7533 {
7534 Elf_Internal_Sym *sym;
7535
7536 for (sym = local_syms;
7537 sym < local_syms + symtab_hdr->sh_info;
7538 ++sym)
7539 if (sym->st_shndx != SHN_UNDEF
7540 && (sym->st_shndx < SHN_LORESERVE
7541 || sym->st_shndx > SHN_HIRESERVE)
7542 && sym->st_value != 0
7543 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7544 {
7545 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7546 sym->st_value -= skip[sym->st_value >> 3];
7547 else
7548 {
7549 (*_bfd_error_handler)
7550 (_("%s defined in removed toc entry"),
7551 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7552 NULL));
7553 sym->st_value = 0;
7554 sym->st_shndx = SHN_ABS;
7555 }
7556 symtab_hdr->contents = (unsigned char *) local_syms;
7557 }
7558 }
7559
7560 /* Finally, adjust any global syms defined in the toc. */
7561 if (toc_inf.global_toc_syms)
7562 {
7563 toc_inf.toc = toc;
7564 toc_inf.skip = skip;
7565 toc_inf.global_toc_syms = FALSE;
7566 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7567 &toc_inf);
7568 }
7569 }
7570
7571 if (local_syms != NULL
7572 && symtab_hdr->contents != (unsigned char *) local_syms)
7573 {
7574 if (!info->keep_memory)
7575 free (local_syms);
7576 else
7577 symtab_hdr->contents = (unsigned char *) local_syms;
7578 }
7579 free (skip);
7580 }
7581
7582 return TRUE;
7583 }
7584
7585 /* Allocate space in .plt, .got and associated reloc sections for
7586 dynamic relocs. */
7587
7588 static bfd_boolean
7589 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7590 {
7591 struct bfd_link_info *info;
7592 struct ppc_link_hash_table *htab;
7593 asection *s;
7594 struct ppc_link_hash_entry *eh;
7595 struct ppc_dyn_relocs *p;
7596 struct got_entry *gent;
7597
7598 if (h->root.type == bfd_link_hash_indirect)
7599 return TRUE;
7600
7601 if (h->root.type == bfd_link_hash_warning)
7602 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7603
7604 info = (struct bfd_link_info *) inf;
7605 htab = ppc_hash_table (info);
7606
7607 if (htab->elf.dynamic_sections_created
7608 && h->dynindx != -1
7609 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7610 {
7611 struct plt_entry *pent;
7612 bfd_boolean doneone = FALSE;
7613 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7614 if (pent->plt.refcount > 0)
7615 {
7616 /* If this is the first .plt entry, make room for the special
7617 first entry. */
7618 s = htab->plt;
7619 if (s->size == 0)
7620 s->size += PLT_INITIAL_ENTRY_SIZE;
7621
7622 pent->plt.offset = s->size;
7623
7624 /* Make room for this entry. */
7625 s->size += PLT_ENTRY_SIZE;
7626
7627 /* Make room for the .glink code. */
7628 s = htab->glink;
7629 if (s->size == 0)
7630 s->size += GLINK_CALL_STUB_SIZE;
7631 /* We need bigger stubs past index 32767. */
7632 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7633 s->size += 4;
7634 s->size += 2*4;
7635
7636 /* We also need to make an entry in the .rela.plt section. */
7637 s = htab->relplt;
7638 s->size += sizeof (Elf64_External_Rela);
7639 doneone = TRUE;
7640 }
7641 else
7642 pent->plt.offset = (bfd_vma) -1;
7643 if (!doneone)
7644 {
7645 h->plt.plist = NULL;
7646 h->needs_plt = 0;
7647 }
7648 }
7649 else
7650 {
7651 h->plt.plist = NULL;
7652 h->needs_plt = 0;
7653 }
7654
7655 eh = (struct ppc_link_hash_entry *) h;
7656 /* Run through the TLS GD got entries first if we're changing them
7657 to TPREL. */
7658 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7659 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7660 if (gent->got.refcount > 0
7661 && (gent->tls_type & TLS_GD) != 0)
7662 {
7663 /* This was a GD entry that has been converted to TPREL. If
7664 there happens to be a TPREL entry we can use that one. */
7665 struct got_entry *ent;
7666 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7667 if (ent->got.refcount > 0
7668 && (ent->tls_type & TLS_TPREL) != 0
7669 && ent->addend == gent->addend
7670 && ent->owner == gent->owner)
7671 {
7672 gent->got.refcount = 0;
7673 break;
7674 }
7675
7676 /* If not, then we'll be using our own TPREL entry. */
7677 if (gent->got.refcount != 0)
7678 gent->tls_type = TLS_TLS | TLS_TPREL;
7679 }
7680
7681 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7682 if (gent->got.refcount > 0)
7683 {
7684 bfd_boolean dyn;
7685
7686 /* Make sure this symbol is output as a dynamic symbol.
7687 Undefined weak syms won't yet be marked as dynamic,
7688 nor will all TLS symbols. */
7689 if (h->dynindx == -1
7690 && !h->forced_local)
7691 {
7692 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7693 return FALSE;
7694 }
7695
7696 if ((gent->tls_type & TLS_LD) != 0
7697 && !h->def_dynamic)
7698 {
7699 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7700 continue;
7701 }
7702
7703 s = ppc64_elf_tdata (gent->owner)->got;
7704 gent->got.offset = s->size;
7705 s->size
7706 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7707 dyn = htab->elf.dynamic_sections_created;
7708 if ((info->shared
7709 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7710 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7711 || h->root.type != bfd_link_hash_undefweak))
7712 ppc64_elf_tdata (gent->owner)->relgot->size
7713 += (gent->tls_type & eh->tls_mask & TLS_GD
7714 ? 2 * sizeof (Elf64_External_Rela)
7715 : sizeof (Elf64_External_Rela));
7716 }
7717 else
7718 gent->got.offset = (bfd_vma) -1;
7719
7720 if (eh->dyn_relocs == NULL)
7721 return TRUE;
7722
7723 /* In the shared -Bsymbolic case, discard space allocated for
7724 dynamic pc-relative relocs against symbols which turn out to be
7725 defined in regular objects. For the normal shared case, discard
7726 space for relocs that have become local due to symbol visibility
7727 changes. */
7728
7729 if (info->shared)
7730 {
7731 /* Relocs that use pc_count are those that appear on a call insn,
7732 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7733 generated via assembly. We want calls to protected symbols to
7734 resolve directly to the function rather than going via the plt.
7735 If people want function pointer comparisons to work as expected
7736 then they should avoid writing weird assembly. */
7737 if (SYMBOL_CALLS_LOCAL (info, h))
7738 {
7739 struct ppc_dyn_relocs **pp;
7740
7741 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7742 {
7743 p->count -= p->pc_count;
7744 p->pc_count = 0;
7745 if (p->count == 0)
7746 *pp = p->next;
7747 else
7748 pp = &p->next;
7749 }
7750 }
7751
7752 /* Also discard relocs on undefined weak syms with non-default
7753 visibility. */
7754 if (eh->dyn_relocs != NULL
7755 && h->root.type == bfd_link_hash_undefweak)
7756 {
7757 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7758 eh->dyn_relocs = NULL;
7759
7760 /* Make sure this symbol is output as a dynamic symbol.
7761 Undefined weak syms won't yet be marked as dynamic. */
7762 else if (h->dynindx == -1
7763 && !h->forced_local)
7764 {
7765 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7766 return FALSE;
7767 }
7768 }
7769 }
7770 else if (ELIMINATE_COPY_RELOCS)
7771 {
7772 /* For the non-shared case, discard space for relocs against
7773 symbols which turn out to need copy relocs or are not
7774 dynamic. */
7775
7776 if (!h->non_got_ref
7777 && h->def_dynamic
7778 && !h->def_regular)
7779 {
7780 /* Make sure this symbol is output as a dynamic symbol.
7781 Undefined weak syms won't yet be marked as dynamic. */
7782 if (h->dynindx == -1
7783 && !h->forced_local)
7784 {
7785 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7786 return FALSE;
7787 }
7788
7789 /* If that succeeded, we know we'll be keeping all the
7790 relocs. */
7791 if (h->dynindx != -1)
7792 goto keep;
7793 }
7794
7795 eh->dyn_relocs = NULL;
7796
7797 keep: ;
7798 }
7799
7800 /* Finally, allocate space. */
7801 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7802 {
7803 asection *sreloc = elf_section_data (p->sec)->sreloc;
7804 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7805 }
7806
7807 return TRUE;
7808 }
7809
7810 /* Find any dynamic relocs that apply to read-only sections. */
7811
7812 static bfd_boolean
7813 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7814 {
7815 struct ppc_link_hash_entry *eh;
7816 struct ppc_dyn_relocs *p;
7817
7818 if (h->root.type == bfd_link_hash_warning)
7819 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7820
7821 eh = (struct ppc_link_hash_entry *) h;
7822 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7823 {
7824 asection *s = p->sec->output_section;
7825
7826 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7827 {
7828 struct bfd_link_info *info = inf;
7829
7830 info->flags |= DF_TEXTREL;
7831
7832 /* Not an error, just cut short the traversal. */
7833 return FALSE;
7834 }
7835 }
7836 return TRUE;
7837 }
7838
7839 /* Set the sizes of the dynamic sections. */
7840
7841 static bfd_boolean
7842 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7843 struct bfd_link_info *info)
7844 {
7845 struct ppc_link_hash_table *htab;
7846 bfd *dynobj;
7847 asection *s;
7848 bfd_boolean relocs;
7849 bfd *ibfd;
7850
7851 htab = ppc_hash_table (info);
7852 dynobj = htab->elf.dynobj;
7853 if (dynobj == NULL)
7854 abort ();
7855
7856 if (htab->elf.dynamic_sections_created)
7857 {
7858 /* Set the contents of the .interp section to the interpreter. */
7859 if (info->executable)
7860 {
7861 s = bfd_get_section_by_name (dynobj, ".interp");
7862 if (s == NULL)
7863 abort ();
7864 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7865 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7866 }
7867 }
7868
7869 /* Set up .got offsets for local syms, and space for local dynamic
7870 relocs. */
7871 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7872 {
7873 struct got_entry **lgot_ents;
7874 struct got_entry **end_lgot_ents;
7875 char *lgot_masks;
7876 bfd_size_type locsymcount;
7877 Elf_Internal_Shdr *symtab_hdr;
7878 asection *srel;
7879
7880 if (!is_ppc64_elf_target (ibfd->xvec))
7881 continue;
7882
7883 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7884 {
7885 s = ppc64_elf_tdata (ibfd)->got;
7886 ppc64_tlsld_got (ibfd)->offset = s->size;
7887 s->size += 16;
7888 if (info->shared)
7889 {
7890 srel = ppc64_elf_tdata (ibfd)->relgot;
7891 srel->size += sizeof (Elf64_External_Rela);
7892 }
7893 }
7894 else
7895 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7896
7897 for (s = ibfd->sections; s != NULL; s = s->next)
7898 {
7899 struct ppc_dyn_relocs *p;
7900
7901 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7902 {
7903 if (!bfd_is_abs_section (p->sec)
7904 && bfd_is_abs_section (p->sec->output_section))
7905 {
7906 /* Input section has been discarded, either because
7907 it is a copy of a linkonce section or due to
7908 linker script /DISCARD/, so we'll be discarding
7909 the relocs too. */
7910 }
7911 else if (p->count != 0)
7912 {
7913 srel = elf_section_data (p->sec)->sreloc;
7914 srel->size += p->count * sizeof (Elf64_External_Rela);
7915 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7916 info->flags |= DF_TEXTREL;
7917 }
7918 }
7919 }
7920
7921 lgot_ents = elf_local_got_ents (ibfd);
7922 if (!lgot_ents)
7923 continue;
7924
7925 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7926 locsymcount = symtab_hdr->sh_info;
7927 end_lgot_ents = lgot_ents + locsymcount;
7928 lgot_masks = (char *) end_lgot_ents;
7929 s = ppc64_elf_tdata (ibfd)->got;
7930 srel = ppc64_elf_tdata (ibfd)->relgot;
7931 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7932 {
7933 struct got_entry *ent;
7934
7935 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7936 if (ent->got.refcount > 0)
7937 {
7938 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7939 {
7940 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7941 {
7942 ppc64_tlsld_got (ibfd)->offset = s->size;
7943 s->size += 16;
7944 if (info->shared)
7945 srel->size += sizeof (Elf64_External_Rela);
7946 }
7947 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7948 }
7949 else
7950 {
7951 ent->got.offset = s->size;
7952 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7953 {
7954 s->size += 16;
7955 if (info->shared)
7956 srel->size += 2 * sizeof (Elf64_External_Rela);
7957 }
7958 else
7959 {
7960 s->size += 8;
7961 if (info->shared)
7962 srel->size += sizeof (Elf64_External_Rela);
7963 }
7964 }
7965 }
7966 else
7967 ent->got.offset = (bfd_vma) -1;
7968 }
7969 }
7970
7971 /* Allocate global sym .plt and .got entries, and space for global
7972 sym dynamic relocs. */
7973 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7974
7975 /* We now have determined the sizes of the various dynamic sections.
7976 Allocate memory for them. */
7977 relocs = FALSE;
7978 for (s = dynobj->sections; s != NULL; s = s->next)
7979 {
7980 if ((s->flags & SEC_LINKER_CREATED) == 0)
7981 continue;
7982
7983 if (s == htab->brlt || s == htab->relbrlt)
7984 /* These haven't been allocated yet; don't strip. */
7985 continue;
7986 else if (s == htab->got
7987 || s == htab->plt
7988 || s == htab->glink
7989 || s == htab->dynbss)
7990 {
7991 /* Strip this section if we don't need it; see the
7992 comment below. */
7993 }
7994 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7995 {
7996 if (s->size != 0)
7997 {
7998 if (s != htab->relplt)
7999 relocs = TRUE;
8000
8001 /* We use the reloc_count field as a counter if we need
8002 to copy relocs into the output file. */
8003 s->reloc_count = 0;
8004 }
8005 }
8006 else
8007 {
8008 /* It's not one of our sections, so don't allocate space. */
8009 continue;
8010 }
8011
8012 if (s->size == 0)
8013 {
8014 /* If we don't need this section, strip it from the
8015 output file. This is mostly to handle .rela.bss and
8016 .rela.plt. We must create both sections in
8017 create_dynamic_sections, because they must be created
8018 before the linker maps input sections to output
8019 sections. The linker does that before
8020 adjust_dynamic_symbol is called, and it is that
8021 function which decides whether anything needs to go
8022 into these sections. */
8023 s->flags |= SEC_EXCLUDE;
8024 continue;
8025 }
8026
8027 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8028 continue;
8029
8030 /* Allocate memory for the section contents. We use bfd_zalloc
8031 here in case unused entries are not reclaimed before the
8032 section's contents are written out. This should not happen,
8033 but this way if it does we get a R_PPC64_NONE reloc in .rela
8034 sections instead of garbage.
8035 We also rely on the section contents being zero when writing
8036 the GOT. */
8037 s->contents = bfd_zalloc (dynobj, s->size);
8038 if (s->contents == NULL)
8039 return FALSE;
8040 }
8041
8042 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8043 {
8044 if (!is_ppc64_elf_target (ibfd->xvec))
8045 continue;
8046
8047 s = ppc64_elf_tdata (ibfd)->got;
8048 if (s != NULL && s != htab->got)
8049 {
8050 if (s->size == 0)
8051 s->flags |= SEC_EXCLUDE;
8052 else
8053 {
8054 s->contents = bfd_zalloc (ibfd, s->size);
8055 if (s->contents == NULL)
8056 return FALSE;
8057 }
8058 }
8059 s = ppc64_elf_tdata (ibfd)->relgot;
8060 if (s != NULL)
8061 {
8062 if (s->size == 0)
8063 s->flags |= SEC_EXCLUDE;
8064 else
8065 {
8066 s->contents = bfd_zalloc (ibfd, s->size);
8067 if (s->contents == NULL)
8068 return FALSE;
8069 relocs = TRUE;
8070 s->reloc_count = 0;
8071 }
8072 }
8073 }
8074
8075 if (htab->elf.dynamic_sections_created)
8076 {
8077 /* Add some entries to the .dynamic section. We fill in the
8078 values later, in ppc64_elf_finish_dynamic_sections, but we
8079 must add the entries now so that we get the correct size for
8080 the .dynamic section. The DT_DEBUG entry is filled in by the
8081 dynamic linker and used by the debugger. */
8082 #define add_dynamic_entry(TAG, VAL) \
8083 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8084
8085 if (info->executable)
8086 {
8087 if (!add_dynamic_entry (DT_DEBUG, 0))
8088 return FALSE;
8089 }
8090
8091 if (htab->plt != NULL && htab->plt->size != 0)
8092 {
8093 if (!add_dynamic_entry (DT_PLTGOT, 0)
8094 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8095 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8096 || !add_dynamic_entry (DT_JMPREL, 0)
8097 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8098 return FALSE;
8099 }
8100
8101 if (NO_OPD_RELOCS)
8102 {
8103 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8104 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8105 return FALSE;
8106 }
8107
8108 if (relocs)
8109 {
8110 if (!add_dynamic_entry (DT_RELA, 0)
8111 || !add_dynamic_entry (DT_RELASZ, 0)
8112 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8113 return FALSE;
8114
8115 /* If any dynamic relocs apply to a read-only section,
8116 then we need a DT_TEXTREL entry. */
8117 if ((info->flags & DF_TEXTREL) == 0)
8118 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8119
8120 if ((info->flags & DF_TEXTREL) != 0)
8121 {
8122 if (!add_dynamic_entry (DT_TEXTREL, 0))
8123 return FALSE;
8124 }
8125 }
8126 }
8127 #undef add_dynamic_entry
8128
8129 return TRUE;
8130 }
8131
8132 /* Determine the type of stub needed, if any, for a call. */
8133
8134 static inline enum ppc_stub_type
8135 ppc_type_of_stub (asection *input_sec,
8136 const Elf_Internal_Rela *rel,
8137 struct ppc_link_hash_entry **hash,
8138 bfd_vma destination)
8139 {
8140 struct ppc_link_hash_entry *h = *hash;
8141 bfd_vma location;
8142 bfd_vma branch_offset;
8143 bfd_vma max_branch_offset;
8144 enum elf_ppc64_reloc_type r_type;
8145
8146 if (h != NULL)
8147 {
8148 struct ppc_link_hash_entry *fdh = h;
8149 if (fdh->oh != NULL
8150 && fdh->oh->is_func_descriptor)
8151 fdh = fdh->oh;
8152
8153 if (fdh->elf.dynindx != -1)
8154 {
8155 struct plt_entry *ent;
8156
8157 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8158 if (ent->addend == rel->r_addend
8159 && ent->plt.offset != (bfd_vma) -1)
8160 {
8161 *hash = fdh;
8162 return ppc_stub_plt_call;
8163 }
8164 }
8165
8166 /* Here, we know we don't have a plt entry. If we don't have a
8167 either a defined function descriptor or a defined entry symbol
8168 in a regular object file, then it is pointless trying to make
8169 any other type of stub. */
8170 if (!((fdh->elf.root.type == bfd_link_hash_defined
8171 || fdh->elf.root.type == bfd_link_hash_defweak)
8172 && fdh->elf.root.u.def.section->output_section != NULL)
8173 && !((h->elf.root.type == bfd_link_hash_defined
8174 || h->elf.root.type == bfd_link_hash_defweak)
8175 && h->elf.root.u.def.section->output_section != NULL))
8176 return ppc_stub_none;
8177 }
8178
8179 /* Determine where the call point is. */
8180 location = (input_sec->output_offset
8181 + input_sec->output_section->vma
8182 + rel->r_offset);
8183
8184 branch_offset = destination - location;
8185 r_type = ELF64_R_TYPE (rel->r_info);
8186
8187 /* Determine if a long branch stub is needed. */
8188 max_branch_offset = 1 << 25;
8189 if (r_type != R_PPC64_REL24)
8190 max_branch_offset = 1 << 15;
8191
8192 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8193 /* We need a stub. Figure out whether a long_branch or plt_branch
8194 is needed later. */
8195 return ppc_stub_long_branch;
8196
8197 return ppc_stub_none;
8198 }
8199
8200 /* Build a .plt call stub. */
8201
8202 static inline bfd_byte *
8203 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8204 {
8205 #define PPC_LO(v) ((v) & 0xffff)
8206 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8207 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8208
8209 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8210 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8211 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8212 if (PPC_HA (offset + 8) != PPC_HA (offset))
8213 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8214 offset += 8;
8215 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
8216 if (PPC_HA (offset + 8) != PPC_HA (offset))
8217 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8218 offset += 8;
8219 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8220 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8221 bfd_put_32 (obfd, BCTR, p), p += 4;
8222 return p;
8223 }
8224
8225 static bfd_boolean
8226 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8227 {
8228 struct ppc_stub_hash_entry *stub_entry;
8229 struct ppc_branch_hash_entry *br_entry;
8230 struct bfd_link_info *info;
8231 struct ppc_link_hash_table *htab;
8232 bfd_byte *loc;
8233 bfd_byte *p;
8234 unsigned int indx;
8235 struct plt_entry *ent;
8236 bfd_vma dest, off;
8237 int size;
8238
8239 /* Massage our args to the form they really have. */
8240 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8241 info = in_arg;
8242
8243 htab = ppc_hash_table (info);
8244
8245 /* Make a note of the offset within the stubs for this entry. */
8246 stub_entry->stub_offset = stub_entry->stub_sec->size;
8247 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8248
8249 htab->stub_count[stub_entry->stub_type - 1] += 1;
8250 switch (stub_entry->stub_type)
8251 {
8252 case ppc_stub_long_branch:
8253 case ppc_stub_long_branch_r2off:
8254 /* Branches are relative. This is where we are going to. */
8255 off = dest = (stub_entry->target_value
8256 + stub_entry->target_section->output_offset
8257 + stub_entry->target_section->output_section->vma);
8258
8259 /* And this is where we are coming from. */
8260 off -= (stub_entry->stub_offset
8261 + stub_entry->stub_sec->output_offset
8262 + stub_entry->stub_sec->output_section->vma);
8263
8264 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8265 size = 4;
8266 else
8267 {
8268 bfd_vma r2off;
8269
8270 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8271 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8272 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8273 loc += 4;
8274 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8275 loc += 4;
8276 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8277 loc += 4;
8278 off -= 12;
8279 size = 16;
8280 }
8281 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8282
8283 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8284 {
8285 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8286 stub_entry->root.string);
8287 htab->stub_error = TRUE;
8288 return FALSE;
8289 }
8290
8291 if (info->emitrelocations)
8292 {
8293 Elf_Internal_Rela *relocs, *r;
8294 struct bfd_elf_section_data *elfsec_data;
8295
8296 elfsec_data = elf_section_data (stub_entry->stub_sec);
8297 relocs = elfsec_data->relocs;
8298 if (relocs == NULL)
8299 {
8300 bfd_size_type relsize;
8301 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8302 relocs = bfd_alloc (htab->stub_bfd, relsize);
8303 if (relocs == NULL)
8304 return FALSE;
8305 elfsec_data->relocs = relocs;
8306 elfsec_data->rel_hdr.sh_size = relsize;
8307 elfsec_data->rel_hdr.sh_entsize = 24;
8308 stub_entry->stub_sec->reloc_count = 0;
8309 }
8310 r = relocs + stub_entry->stub_sec->reloc_count;
8311 stub_entry->stub_sec->reloc_count += 1;
8312 r->r_offset = loc - stub_entry->stub_sec->contents;
8313 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8314 r->r_addend = dest;
8315 if (stub_entry->h != NULL)
8316 {
8317 struct elf_link_hash_entry **hashes;
8318 unsigned long symndx;
8319 struct ppc_link_hash_entry *h;
8320
8321 hashes = elf_sym_hashes (htab->stub_bfd);
8322 if (hashes == NULL)
8323 {
8324 bfd_size_type hsize;
8325
8326 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8327 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8328 if (hashes == NULL)
8329 return FALSE;
8330 elf_sym_hashes (htab->stub_bfd) = hashes;
8331 htab->stub_globals = 1;
8332 }
8333 symndx = htab->stub_globals++;
8334 h = stub_entry->h;
8335 hashes[symndx] = &h->elf;
8336 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8337 if (h->oh != NULL && h->oh->is_func)
8338 h = h->oh;
8339 if (h->elf.root.u.def.section != stub_entry->target_section)
8340 /* H is an opd symbol. The addend must be zero. */
8341 r->r_addend = 0;
8342 else
8343 {
8344 off = (h->elf.root.u.def.value
8345 + h->elf.root.u.def.section->output_offset
8346 + h->elf.root.u.def.section->output_section->vma);
8347 r->r_addend -= off;
8348 }
8349 }
8350 }
8351 break;
8352
8353 case ppc_stub_plt_branch:
8354 case ppc_stub_plt_branch_r2off:
8355 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8356 stub_entry->root.string + 9,
8357 FALSE, FALSE);
8358 if (br_entry == NULL)
8359 {
8360 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8361 stub_entry->root.string);
8362 htab->stub_error = TRUE;
8363 return FALSE;
8364 }
8365
8366 off = (stub_entry->target_value
8367 + stub_entry->target_section->output_offset
8368 + stub_entry->target_section->output_section->vma);
8369
8370 bfd_put_64 (htab->brlt->owner, off,
8371 htab->brlt->contents + br_entry->offset);
8372
8373 if (htab->relbrlt != NULL)
8374 {
8375 /* Create a reloc for the branch lookup table entry. */
8376 Elf_Internal_Rela rela;
8377 bfd_byte *rl;
8378
8379 rela.r_offset = (br_entry->offset
8380 + htab->brlt->output_offset
8381 + htab->brlt->output_section->vma);
8382 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8383 rela.r_addend = off;
8384
8385 rl = htab->relbrlt->contents;
8386 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8387 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8388 }
8389 else if (info->emitrelocations)
8390 {
8391 Elf_Internal_Rela *relocs, *r;
8392 struct bfd_elf_section_data *elfsec_data;
8393
8394 elfsec_data = elf_section_data (htab->brlt);
8395 relocs = elfsec_data->relocs;
8396 if (relocs == NULL)
8397 {
8398 bfd_size_type relsize;
8399 relsize = htab->brlt->reloc_count * sizeof (*relocs);
8400 relocs = bfd_alloc (htab->brlt->owner, relsize);
8401 if (relocs == NULL)
8402 return FALSE;
8403 elfsec_data->relocs = relocs;
8404 elfsec_data->rel_hdr.sh_size = relsize;
8405 elfsec_data->rel_hdr.sh_entsize = 24;
8406 htab->brlt->reloc_count = 0;
8407 }
8408 r = relocs + htab->brlt->reloc_count;
8409 htab->brlt->reloc_count += 1;
8410 r->r_offset = (br_entry->offset
8411 + htab->brlt->output_offset
8412 + htab->brlt->output_section->vma);
8413 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8414 r->r_addend = off;
8415 }
8416
8417 off = (br_entry->offset
8418 + htab->brlt->output_offset
8419 + htab->brlt->output_section->vma
8420 - elf_gp (htab->brlt->output_section->owner)
8421 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8422
8423 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8424 {
8425 (*_bfd_error_handler)
8426 (_("linkage table error against `%s'"),
8427 stub_entry->root.string);
8428 bfd_set_error (bfd_error_bad_value);
8429 htab->stub_error = TRUE;
8430 return FALSE;
8431 }
8432
8433 indx = off;
8434 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8435 {
8436 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8437 loc += 4;
8438 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8439 size = 16;
8440 }
8441 else
8442 {
8443 bfd_vma r2off;
8444
8445 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8446 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8447 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8448 loc += 4;
8449 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8450 loc += 4;
8451 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8452 loc += 4;
8453 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8454 loc += 4;
8455 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8456 size = 28;
8457 }
8458 loc += 4;
8459 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8460 loc += 4;
8461 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8462 break;
8463
8464 case ppc_stub_plt_call:
8465 /* Do the best we can for shared libraries built without
8466 exporting ".foo" for each "foo". This can happen when symbol
8467 versioning scripts strip all bar a subset of symbols. */
8468 if (stub_entry->h->oh != NULL
8469 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8470 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8471 {
8472 /* Point the symbol at the stub. There may be multiple stubs,
8473 we don't really care; The main thing is to make this sym
8474 defined somewhere. Maybe defining the symbol in the stub
8475 section is a silly idea. If we didn't do this, htab->top_id
8476 could disappear. */
8477 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8478 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8479 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8480 }
8481
8482 /* Now build the stub. */
8483 off = (bfd_vma) -1;
8484 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8485 if (ent->addend == stub_entry->addend)
8486 {
8487 off = ent->plt.offset;
8488 break;
8489 }
8490 if (off >= (bfd_vma) -2)
8491 abort ();
8492
8493 off &= ~ (bfd_vma) 1;
8494 off += (htab->plt->output_offset
8495 + htab->plt->output_section->vma
8496 - elf_gp (htab->plt->output_section->owner)
8497 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8498
8499 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8500 {
8501 (*_bfd_error_handler)
8502 (_("linkage table error against `%s'"),
8503 stub_entry->h->elf.root.root.string);
8504 bfd_set_error (bfd_error_bad_value);
8505 htab->stub_error = TRUE;
8506 return FALSE;
8507 }
8508
8509 p = build_plt_stub (htab->stub_bfd, loc, off);
8510 size = p - loc;
8511 break;
8512
8513 default:
8514 BFD_FAIL ();
8515 return FALSE;
8516 }
8517
8518 stub_entry->stub_sec->size += size;
8519
8520 if (htab->emit_stub_syms)
8521 {
8522 struct elf_link_hash_entry *h;
8523 size_t len1, len2;
8524 char *name;
8525 const char *const stub_str[] = { "long_branch",
8526 "long_branch_r2off",
8527 "plt_branch",
8528 "plt_branch_r2off",
8529 "plt_call" };
8530
8531 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8532 len2 = strlen (stub_entry->root.string);
8533 name = bfd_malloc (len1 + len2 + 2);
8534 if (name == NULL)
8535 return FALSE;
8536 memcpy (name, stub_entry->root.string, 9);
8537 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8538 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8539 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8540 if (h == NULL)
8541 return FALSE;
8542 if (h->root.type == bfd_link_hash_new)
8543 {
8544 h->root.type = bfd_link_hash_defined;
8545 h->root.u.def.section = stub_entry->stub_sec;
8546 h->root.u.def.value = stub_entry->stub_offset;
8547 h->ref_regular = 1;
8548 h->def_regular = 1;
8549 h->ref_regular_nonweak = 1;
8550 h->forced_local = 1;
8551 h->non_elf = 0;
8552 }
8553 }
8554
8555 return TRUE;
8556 }
8557
8558 /* As above, but don't actually build the stub. Just bump offset so
8559 we know stub section sizes, and select plt_branch stubs where
8560 long_branch stubs won't do. */
8561
8562 static bfd_boolean
8563 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8564 {
8565 struct ppc_stub_hash_entry *stub_entry;
8566 struct bfd_link_info *info;
8567 struct ppc_link_hash_table *htab;
8568 bfd_vma off;
8569 int size;
8570
8571 /* Massage our args to the form they really have. */
8572 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8573 info = in_arg;
8574
8575 htab = ppc_hash_table (info);
8576
8577 if (stub_entry->stub_type == ppc_stub_plt_call)
8578 {
8579 struct plt_entry *ent;
8580 off = (bfd_vma) -1;
8581 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8582 if (ent->addend == stub_entry->addend)
8583 {
8584 off = ent->plt.offset & ~(bfd_vma) 1;
8585 break;
8586 }
8587 if (off >= (bfd_vma) -2)
8588 abort ();
8589 off += (htab->plt->output_offset
8590 + htab->plt->output_section->vma
8591 - elf_gp (htab->plt->output_section->owner)
8592 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8593
8594 size = PLT_CALL_STUB_SIZE;
8595 if (PPC_HA (off + 16) != PPC_HA (off))
8596 size += 4;
8597 }
8598 else
8599 {
8600 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8601 variants. */
8602 off = (stub_entry->target_value
8603 + stub_entry->target_section->output_offset
8604 + stub_entry->target_section->output_section->vma);
8605 off -= (stub_entry->stub_sec->size
8606 + stub_entry->stub_sec->output_offset
8607 + stub_entry->stub_sec->output_section->vma);
8608
8609 /* Reset the stub type from the plt variant in case we now
8610 can reach with a shorter stub. */
8611 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8612 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8613
8614 size = 4;
8615 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8616 {
8617 off -= 12;
8618 size = 16;
8619 }
8620
8621 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8622 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8623 {
8624 struct ppc_branch_hash_entry *br_entry;
8625
8626 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8627 stub_entry->root.string + 9,
8628 TRUE, FALSE);
8629 if (br_entry == NULL)
8630 {
8631 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8632 stub_entry->root.string);
8633 htab->stub_error = TRUE;
8634 return FALSE;
8635 }
8636
8637 if (br_entry->iter != htab->stub_iteration)
8638 {
8639 br_entry->iter = htab->stub_iteration;
8640 br_entry->offset = htab->brlt->size;
8641 htab->brlt->size += 8;
8642
8643 if (htab->relbrlt != NULL)
8644 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8645 else if (info->emitrelocations)
8646 {
8647 htab->brlt->reloc_count += 1;
8648 htab->brlt->flags |= SEC_RELOC;
8649 }
8650 }
8651
8652 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8653 size = 16;
8654 if (stub_entry->stub_type != ppc_stub_plt_branch)
8655 size = 28;
8656 }
8657 else if (info->emitrelocations)
8658 {
8659 stub_entry->stub_sec->reloc_count += 1;
8660 stub_entry->stub_sec->flags |= SEC_RELOC;
8661 }
8662 }
8663
8664 stub_entry->stub_sec->size += size;
8665 return TRUE;
8666 }
8667
8668 /* Set up various things so that we can make a list of input sections
8669 for each output section included in the link. Returns -1 on error,
8670 0 when no stubs will be needed, and 1 on success. */
8671
8672 int
8673 ppc64_elf_setup_section_lists (bfd *output_bfd,
8674 struct bfd_link_info *info,
8675 int no_multi_toc)
8676 {
8677 bfd *input_bfd;
8678 int top_id, top_index, id;
8679 asection *section;
8680 asection **input_list;
8681 bfd_size_type amt;
8682 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8683
8684 htab->no_multi_toc = no_multi_toc;
8685
8686 if (htab->brlt == NULL)
8687 return 0;
8688
8689 /* Find the top input section id. */
8690 for (input_bfd = info->input_bfds, top_id = 3;
8691 input_bfd != NULL;
8692 input_bfd = input_bfd->link_next)
8693 {
8694 for (section = input_bfd->sections;
8695 section != NULL;
8696 section = section->next)
8697 {
8698 if (top_id < section->id)
8699 top_id = section->id;
8700 }
8701 }
8702
8703 htab->top_id = top_id;
8704 amt = sizeof (struct map_stub) * (top_id + 1);
8705 htab->stub_group = bfd_zmalloc (amt);
8706 if (htab->stub_group == NULL)
8707 return -1;
8708
8709 /* Set toc_off for com, und, abs and ind sections. */
8710 for (id = 0; id < 3; id++)
8711 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8712
8713 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8714
8715 /* We can't use output_bfd->section_count here to find the top output
8716 section index as some sections may have been removed, and
8717 strip_excluded_output_sections doesn't renumber the indices. */
8718 for (section = output_bfd->sections, top_index = 0;
8719 section != NULL;
8720 section = section->next)
8721 {
8722 if (top_index < section->index)
8723 top_index = section->index;
8724 }
8725
8726 htab->top_index = top_index;
8727 amt = sizeof (asection *) * (top_index + 1);
8728 input_list = bfd_zmalloc (amt);
8729 htab->input_list = input_list;
8730 if (input_list == NULL)
8731 return -1;
8732
8733 return 1;
8734 }
8735
8736 /* The linker repeatedly calls this function for each TOC input section
8737 and linker generated GOT section. Group input bfds such that the toc
8738 within a group is less than 64k in size. Will break with cute linker
8739 scripts that play games with dot in the output toc section. */
8740
8741 void
8742 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8743 {
8744 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8745
8746 if (!htab->no_multi_toc)
8747 {
8748 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8749 bfd_vma off = addr - htab->toc_curr;
8750
8751 if (off + isec->size > 0x10000)
8752 htab->toc_curr = addr;
8753
8754 elf_gp (isec->owner) = (htab->toc_curr
8755 - elf_gp (isec->output_section->owner)
8756 + TOC_BASE_OFF);
8757 }
8758 }
8759
8760 /* Called after the last call to the above function. */
8761
8762 void
8763 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8764 {
8765 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8766
8767 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8768
8769 /* toc_curr tracks the TOC offset used for code sections below in
8770 ppc64_elf_next_input_section. Start off at 0x8000. */
8771 htab->toc_curr = TOC_BASE_OFF;
8772 }
8773
8774 /* No toc references were found in ISEC. If the code in ISEC makes no
8775 calls, then there's no need to use toc adjusting stubs when branching
8776 into ISEC. Actually, indirect calls from ISEC are OK as they will
8777 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8778 needed, and 2 if a cyclical call-graph was found but no other reason
8779 for a stub was detected. If called from the top level, a return of
8780 2 means the same as a return of 0. */
8781
8782 static int
8783 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8784 {
8785 Elf_Internal_Rela *relstart, *rel;
8786 Elf_Internal_Sym *local_syms;
8787 int ret;
8788 struct ppc_link_hash_table *htab;
8789
8790 /* We know none of our code bearing sections will need toc stubs. */
8791 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8792 return 0;
8793
8794 if (isec->size == 0)
8795 return 0;
8796
8797 if (isec->output_section == NULL)
8798 return 0;
8799
8800 /* Hack for linux kernel. .fixup contains branches, but only back to
8801 the function that hit an exception. */
8802 if (strcmp (isec->name, ".fixup") == 0)
8803 return 0;
8804
8805 if (isec->reloc_count == 0)
8806 return 0;
8807
8808 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8809 info->keep_memory);
8810 if (relstart == NULL)
8811 return -1;
8812
8813 /* Look for branches to outside of this section. */
8814 local_syms = NULL;
8815 ret = 0;
8816 htab = ppc_hash_table (info);
8817 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8818 {
8819 enum elf_ppc64_reloc_type r_type;
8820 unsigned long r_symndx;
8821 struct elf_link_hash_entry *h;
8822 Elf_Internal_Sym *sym;
8823 asection *sym_sec;
8824 long *opd_adjust;
8825 bfd_vma sym_value;
8826 bfd_vma dest;
8827
8828 r_type = ELF64_R_TYPE (rel->r_info);
8829 if (r_type != R_PPC64_REL24
8830 && r_type != R_PPC64_REL14
8831 && r_type != R_PPC64_REL14_BRTAKEN
8832 && r_type != R_PPC64_REL14_BRNTAKEN)
8833 continue;
8834
8835 r_symndx = ELF64_R_SYM (rel->r_info);
8836 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8837 isec->owner))
8838 {
8839 ret = -1;
8840 break;
8841 }
8842
8843 /* Calls to dynamic lib functions go through a plt call stub
8844 that uses r2. Branches to undefined symbols might be a call
8845 using old-style dot symbols that can be satisfied by a plt
8846 call into a new-style dynamic library. */
8847 if (sym_sec == NULL)
8848 {
8849 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8850 if (eh != NULL
8851 && eh->oh != NULL
8852 && eh->oh->elf.plt.plist != NULL)
8853 {
8854 ret = 1;
8855 break;
8856 }
8857
8858 /* Ignore other undefined symbols. */
8859 continue;
8860 }
8861
8862 /* Assume branches to other sections not included in the link need
8863 stubs too, to cover -R and absolute syms. */
8864 if (sym_sec->output_section == NULL)
8865 {
8866 ret = 1;
8867 break;
8868 }
8869
8870 if (h == NULL)
8871 sym_value = sym->st_value;
8872 else
8873 {
8874 if (h->root.type != bfd_link_hash_defined
8875 && h->root.type != bfd_link_hash_defweak)
8876 abort ();
8877 sym_value = h->root.u.def.value;
8878 }
8879 sym_value += rel->r_addend;
8880
8881 /* If this branch reloc uses an opd sym, find the code section. */
8882 opd_adjust = get_opd_info (sym_sec);
8883 if (opd_adjust != NULL)
8884 {
8885 if (h == NULL)
8886 {
8887 long adjust;
8888
8889 adjust = opd_adjust[sym->st_value / 8];
8890 if (adjust == -1)
8891 /* Assume deleted functions won't ever be called. */
8892 continue;
8893 sym_value += adjust;
8894 }
8895
8896 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8897 if (dest == (bfd_vma) -1)
8898 continue;
8899 }
8900 else
8901 dest = (sym_value
8902 + sym_sec->output_offset
8903 + sym_sec->output_section->vma);
8904
8905 /* Ignore branch to self. */
8906 if (sym_sec == isec)
8907 continue;
8908
8909 /* If the called function uses the toc, we need a stub. */
8910 if (sym_sec->has_toc_reloc
8911 || sym_sec->makes_toc_func_call)
8912 {
8913 ret = 1;
8914 break;
8915 }
8916
8917 /* Assume any branch that needs a long branch stub might in fact
8918 need a plt_branch stub. A plt_branch stub uses r2. */
8919 else if (dest - (isec->output_offset
8920 + isec->output_section->vma
8921 + rel->r_offset) + (1 << 25) >= (2 << 25))
8922 {
8923 ret = 1;
8924 break;
8925 }
8926
8927 /* If calling back to a section in the process of being tested, we
8928 can't say for sure that no toc adjusting stubs are needed, so
8929 don't return zero. */
8930 else if (sym_sec->call_check_in_progress)
8931 ret = 2;
8932
8933 /* Branches to another section that itself doesn't have any TOC
8934 references are OK. Recursively call ourselves to check. */
8935 else if (sym_sec->id <= htab->top_id
8936 && htab->stub_group[sym_sec->id].toc_off == 0)
8937 {
8938 int recur;
8939
8940 /* Mark current section as indeterminate, so that other
8941 sections that call back to current won't be marked as
8942 known. */
8943 isec->call_check_in_progress = 1;
8944 recur = toc_adjusting_stub_needed (info, sym_sec);
8945 isec->call_check_in_progress = 0;
8946
8947 if (recur < 0)
8948 {
8949 /* An error. Exit. */
8950 ret = -1;
8951 break;
8952 }
8953 else if (recur <= 1)
8954 {
8955 /* Known result. Mark as checked and set section flag. */
8956 htab->stub_group[sym_sec->id].toc_off = 1;
8957 if (recur != 0)
8958 {
8959 sym_sec->makes_toc_func_call = 1;
8960 ret = 1;
8961 break;
8962 }
8963 }
8964 else
8965 {
8966 /* Unknown result. Continue checking. */
8967 ret = 2;
8968 }
8969 }
8970 }
8971
8972 if (local_syms != NULL
8973 && (elf_tdata (isec->owner)->symtab_hdr.contents
8974 != (unsigned char *) local_syms))
8975 free (local_syms);
8976 if (elf_section_data (isec)->relocs != relstart)
8977 free (relstart);
8978
8979 return ret;
8980 }
8981
8982 /* The linker repeatedly calls this function for each input section,
8983 in the order that input sections are linked into output sections.
8984 Build lists of input sections to determine groupings between which
8985 we may insert linker stubs. */
8986
8987 bfd_boolean
8988 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8989 {
8990 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8991
8992 if ((isec->output_section->flags & SEC_CODE) != 0
8993 && isec->output_section->index <= htab->top_index)
8994 {
8995 asection **list = htab->input_list + isec->output_section->index;
8996 /* Steal the link_sec pointer for our list. */
8997 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8998 /* This happens to make the list in reverse order,
8999 which is what we want. */
9000 PREV_SEC (isec) = *list;
9001 *list = isec;
9002 }
9003
9004 if (htab->multi_toc_needed)
9005 {
9006 /* If a code section has a function that uses the TOC then we need
9007 to use the right TOC (obviously). Also, make sure that .opd gets
9008 the correct TOC value for R_PPC64_TOC relocs that don't have or
9009 can't find their function symbol (shouldn't ever happen now). */
9010 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
9011 {
9012 if (elf_gp (isec->owner) != 0)
9013 htab->toc_curr = elf_gp (isec->owner);
9014 }
9015 else if (htab->stub_group[isec->id].toc_off == 0)
9016 {
9017 int ret = toc_adjusting_stub_needed (info, isec);
9018 if (ret < 0)
9019 return FALSE;
9020 else
9021 isec->makes_toc_func_call = ret & 1;
9022 }
9023 }
9024
9025 /* Functions that don't use the TOC can belong in any TOC group.
9026 Use the last TOC base. This happens to make _init and _fini
9027 pasting work. */
9028 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9029 return TRUE;
9030 }
9031
9032 /* See whether we can group stub sections together. Grouping stub
9033 sections may result in fewer stubs. More importantly, we need to
9034 put all .init* and .fini* stubs at the beginning of the .init or
9035 .fini output sections respectively, because glibc splits the
9036 _init and _fini functions into multiple parts. Putting a stub in
9037 the middle of a function is not a good idea. */
9038
9039 static void
9040 group_sections (struct ppc_link_hash_table *htab,
9041 bfd_size_type stub_group_size,
9042 bfd_boolean stubs_always_before_branch)
9043 {
9044 asection **list;
9045 bfd_size_type stub14_group_size;
9046 bfd_boolean suppress_size_errors;
9047
9048 suppress_size_errors = FALSE;
9049 stub14_group_size = stub_group_size;
9050 if (stub_group_size == 1)
9051 {
9052 /* Default values. */
9053 if (stubs_always_before_branch)
9054 {
9055 stub_group_size = 0x1e00000;
9056 stub14_group_size = 0x7800;
9057 }
9058 else
9059 {
9060 stub_group_size = 0x1c00000;
9061 stub14_group_size = 0x7000;
9062 }
9063 suppress_size_errors = TRUE;
9064 }
9065
9066 list = htab->input_list + htab->top_index;
9067 do
9068 {
9069 asection *tail = *list;
9070 while (tail != NULL)
9071 {
9072 asection *curr;
9073 asection *prev;
9074 bfd_size_type total;
9075 bfd_boolean big_sec;
9076 bfd_vma curr_toc;
9077
9078 curr = tail;
9079 total = tail->size;
9080 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9081 ? stub14_group_size : stub_group_size);
9082 if (big_sec && !suppress_size_errors)
9083 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9084 tail->owner, tail);
9085 curr_toc = htab->stub_group[tail->id].toc_off;
9086
9087 while ((prev = PREV_SEC (curr)) != NULL
9088 && ((total += curr->output_offset - prev->output_offset)
9089 < (ppc64_elf_section_data (prev)->has_14bit_branch
9090 ? stub14_group_size : stub_group_size))
9091 && htab->stub_group[prev->id].toc_off == curr_toc)
9092 curr = prev;
9093
9094 /* OK, the size from the start of CURR to the end is less
9095 than stub_group_size and thus can be handled by one stub
9096 section. (or the tail section is itself larger than
9097 stub_group_size, in which case we may be toast.) We
9098 should really be keeping track of the total size of stubs
9099 added here, as stubs contribute to the final output
9100 section size. That's a little tricky, and this way will
9101 only break if stubs added make the total size more than
9102 2^25, ie. for the default stub_group_size, if stubs total
9103 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9104 do
9105 {
9106 prev = PREV_SEC (tail);
9107 /* Set up this stub group. */
9108 htab->stub_group[tail->id].link_sec = curr;
9109 }
9110 while (tail != curr && (tail = prev) != NULL);
9111
9112 /* But wait, there's more! Input sections up to stub_group_size
9113 bytes before the stub section can be handled by it too.
9114 Don't do this if we have a really large section after the
9115 stubs, as adding more stubs increases the chance that
9116 branches may not reach into the stub section. */
9117 if (!stubs_always_before_branch && !big_sec)
9118 {
9119 total = 0;
9120 while (prev != NULL
9121 && ((total += tail->output_offset - prev->output_offset)
9122 < (ppc64_elf_section_data (prev)->has_14bit_branch
9123 ? stub14_group_size : stub_group_size))
9124 && htab->stub_group[prev->id].toc_off == curr_toc)
9125 {
9126 tail = prev;
9127 prev = PREV_SEC (tail);
9128 htab->stub_group[tail->id].link_sec = curr;
9129 }
9130 }
9131 tail = prev;
9132 }
9133 }
9134 while (list-- != htab->input_list);
9135 free (htab->input_list);
9136 #undef PREV_SEC
9137 }
9138
9139 /* Determine and set the size of the stub section for a final link.
9140
9141 The basic idea here is to examine all the relocations looking for
9142 PC-relative calls to a target that is unreachable with a "bl"
9143 instruction. */
9144
9145 bfd_boolean
9146 ppc64_elf_size_stubs (bfd *output_bfd,
9147 struct bfd_link_info *info,
9148 bfd_signed_vma group_size,
9149 asection *(*add_stub_section) (const char *, asection *),
9150 void (*layout_sections_again) (void))
9151 {
9152 bfd_size_type stub_group_size;
9153 bfd_boolean stubs_always_before_branch;
9154 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9155
9156 /* Stash our params away. */
9157 htab->add_stub_section = add_stub_section;
9158 htab->layout_sections_again = layout_sections_again;
9159 stubs_always_before_branch = group_size < 0;
9160 if (group_size < 0)
9161 stub_group_size = -group_size;
9162 else
9163 stub_group_size = group_size;
9164
9165 group_sections (htab, stub_group_size, stubs_always_before_branch);
9166
9167 while (1)
9168 {
9169 bfd *input_bfd;
9170 unsigned int bfd_indx;
9171 asection *stub_sec;
9172
9173 htab->stub_iteration += 1;
9174
9175 for (input_bfd = info->input_bfds, bfd_indx = 0;
9176 input_bfd != NULL;
9177 input_bfd = input_bfd->link_next, bfd_indx++)
9178 {
9179 Elf_Internal_Shdr *symtab_hdr;
9180 asection *section;
9181 Elf_Internal_Sym *local_syms = NULL;
9182
9183 if (!is_ppc64_elf_target (input_bfd->xvec))
9184 continue;
9185
9186 /* We'll need the symbol table in a second. */
9187 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9188 if (symtab_hdr->sh_info == 0)
9189 continue;
9190
9191 /* Walk over each section attached to the input bfd. */
9192 for (section = input_bfd->sections;
9193 section != NULL;
9194 section = section->next)
9195 {
9196 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9197
9198 /* If there aren't any relocs, then there's nothing more
9199 to do. */
9200 if ((section->flags & SEC_RELOC) == 0
9201 || (section->flags & SEC_ALLOC) == 0
9202 || (section->flags & SEC_LOAD) == 0
9203 || (section->flags & SEC_CODE) == 0
9204 || section->reloc_count == 0)
9205 continue;
9206
9207 /* If this section is a link-once section that will be
9208 discarded, then don't create any stubs. */
9209 if (section->output_section == NULL
9210 || section->output_section->owner != output_bfd)
9211 continue;
9212
9213 /* Get the relocs. */
9214 internal_relocs
9215 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9216 info->keep_memory);
9217 if (internal_relocs == NULL)
9218 goto error_ret_free_local;
9219
9220 /* Now examine each relocation. */
9221 irela = internal_relocs;
9222 irelaend = irela + section->reloc_count;
9223 for (; irela < irelaend; irela++)
9224 {
9225 enum elf_ppc64_reloc_type r_type;
9226 unsigned int r_indx;
9227 enum ppc_stub_type stub_type;
9228 struct ppc_stub_hash_entry *stub_entry;
9229 asection *sym_sec, *code_sec;
9230 bfd_vma sym_value;
9231 bfd_vma destination;
9232 bfd_boolean ok_dest;
9233 struct ppc_link_hash_entry *hash;
9234 struct ppc_link_hash_entry *fdh;
9235 struct elf_link_hash_entry *h;
9236 Elf_Internal_Sym *sym;
9237 char *stub_name;
9238 const asection *id_sec;
9239 long *opd_adjust;
9240
9241 r_type = ELF64_R_TYPE (irela->r_info);
9242 r_indx = ELF64_R_SYM (irela->r_info);
9243
9244 if (r_type >= R_PPC64_max)
9245 {
9246 bfd_set_error (bfd_error_bad_value);
9247 goto error_ret_free_internal;
9248 }
9249
9250 /* Only look for stubs on branch instructions. */
9251 if (r_type != R_PPC64_REL24
9252 && r_type != R_PPC64_REL14
9253 && r_type != R_PPC64_REL14_BRTAKEN
9254 && r_type != R_PPC64_REL14_BRNTAKEN)
9255 continue;
9256
9257 /* Now determine the call target, its name, value,
9258 section. */
9259 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9260 r_indx, input_bfd))
9261 goto error_ret_free_internal;
9262 hash = (struct ppc_link_hash_entry *) h;
9263
9264 ok_dest = FALSE;
9265 fdh = NULL;
9266 sym_value = 0;
9267 if (hash == NULL)
9268 {
9269 sym_value = sym->st_value;
9270 ok_dest = TRUE;
9271 }
9272 else if (hash->elf.root.type == bfd_link_hash_defined
9273 || hash->elf.root.type == bfd_link_hash_defweak)
9274 {
9275 sym_value = hash->elf.root.u.def.value;
9276 if (sym_sec->output_section != NULL)
9277 ok_dest = TRUE;
9278 }
9279 else if (hash->elf.root.type == bfd_link_hash_undefweak
9280 || hash->elf.root.type == bfd_link_hash_undefined)
9281 {
9282 /* Recognise an old ABI func code entry sym, and
9283 use the func descriptor sym instead if it is
9284 defined. */
9285 if (hash->elf.root.root.string[0] == '.'
9286 && (fdh = get_fdh (hash, htab)) != NULL)
9287 {
9288 if (fdh->elf.root.type == bfd_link_hash_defined
9289 || fdh->elf.root.type == bfd_link_hash_defweak)
9290 {
9291 sym_sec = fdh->elf.root.u.def.section;
9292 sym_value = fdh->elf.root.u.def.value;
9293 if (sym_sec->output_section != NULL)
9294 ok_dest = TRUE;
9295 }
9296 else
9297 fdh = NULL;
9298 }
9299 }
9300 else
9301 {
9302 bfd_set_error (bfd_error_bad_value);
9303 goto error_ret_free_internal;
9304 }
9305
9306 destination = 0;
9307 if (ok_dest)
9308 {
9309 sym_value += irela->r_addend;
9310 destination = (sym_value
9311 + sym_sec->output_offset
9312 + sym_sec->output_section->vma);
9313 }
9314
9315 code_sec = sym_sec;
9316 opd_adjust = get_opd_info (sym_sec);
9317 if (opd_adjust != NULL)
9318 {
9319 bfd_vma dest;
9320
9321 if (hash == NULL)
9322 {
9323 long adjust = opd_adjust[sym_value / 8];
9324 if (adjust == -1)
9325 continue;
9326 sym_value += adjust;
9327 }
9328 dest = opd_entry_value (sym_sec, sym_value,
9329 &code_sec, &sym_value);
9330 if (dest != (bfd_vma) -1)
9331 {
9332 destination = dest;
9333 if (fdh != NULL)
9334 {
9335 /* Fixup old ABI sym to point at code
9336 entry. */
9337 hash->elf.root.type = bfd_link_hash_defweak;
9338 hash->elf.root.u.def.section = code_sec;
9339 hash->elf.root.u.def.value = sym_value;
9340 }
9341 }
9342 }
9343
9344 /* Determine what (if any) linker stub is needed. */
9345 stub_type = ppc_type_of_stub (section, irela, &hash,
9346 destination);
9347
9348 if (stub_type != ppc_stub_plt_call)
9349 {
9350 /* Check whether we need a TOC adjusting stub.
9351 Since the linker pastes together pieces from
9352 different object files when creating the
9353 _init and _fini functions, it may be that a
9354 call to what looks like a local sym is in
9355 fact a call needing a TOC adjustment. */
9356 if (code_sec != NULL
9357 && code_sec->output_section != NULL
9358 && (htab->stub_group[code_sec->id].toc_off
9359 != htab->stub_group[section->id].toc_off)
9360 && (code_sec->has_toc_reloc
9361 || code_sec->makes_toc_func_call))
9362 stub_type = ppc_stub_long_branch_r2off;
9363 }
9364
9365 if (stub_type == ppc_stub_none)
9366 continue;
9367
9368 /* __tls_get_addr calls might be eliminated. */
9369 if (stub_type != ppc_stub_plt_call
9370 && hash != NULL
9371 && (hash == htab->tls_get_addr
9372 || hash == htab->tls_get_addr_fd)
9373 && section->has_tls_reloc
9374 && irela != internal_relocs)
9375 {
9376 /* Get tls info. */
9377 char *tls_mask;
9378
9379 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9380 irela - 1, input_bfd))
9381 goto error_ret_free_internal;
9382 if (*tls_mask != 0)
9383 continue;
9384 }
9385
9386 /* Support for grouping stub sections. */
9387 id_sec = htab->stub_group[section->id].link_sec;
9388
9389 /* Get the name of this stub. */
9390 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9391 if (!stub_name)
9392 goto error_ret_free_internal;
9393
9394 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9395 stub_name, FALSE, FALSE);
9396 if (stub_entry != NULL)
9397 {
9398 /* The proper stub has already been created. */
9399 free (stub_name);
9400 continue;
9401 }
9402
9403 stub_entry = ppc_add_stub (stub_name, section, htab);
9404 if (stub_entry == NULL)
9405 {
9406 free (stub_name);
9407 error_ret_free_internal:
9408 if (elf_section_data (section)->relocs == NULL)
9409 free (internal_relocs);
9410 error_ret_free_local:
9411 if (local_syms != NULL
9412 && (symtab_hdr->contents
9413 != (unsigned char *) local_syms))
9414 free (local_syms);
9415 return FALSE;
9416 }
9417
9418 stub_entry->stub_type = stub_type;
9419 stub_entry->target_value = sym_value;
9420 stub_entry->target_section = code_sec;
9421 stub_entry->h = hash;
9422 stub_entry->addend = irela->r_addend;
9423
9424 if (stub_entry->h != NULL)
9425 htab->stub_globals += 1;
9426 }
9427
9428 /* We're done with the internal relocs, free them. */
9429 if (elf_section_data (section)->relocs != internal_relocs)
9430 free (internal_relocs);
9431 }
9432
9433 if (local_syms != NULL
9434 && symtab_hdr->contents != (unsigned char *) local_syms)
9435 {
9436 if (!info->keep_memory)
9437 free (local_syms);
9438 else
9439 symtab_hdr->contents = (unsigned char *) local_syms;
9440 }
9441 }
9442
9443 /* We may have added some stubs. Find out the new size of the
9444 stub sections. */
9445 for (stub_sec = htab->stub_bfd->sections;
9446 stub_sec != NULL;
9447 stub_sec = stub_sec->next)
9448 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9449 {
9450 stub_sec->rawsize = stub_sec->size;
9451 stub_sec->size = 0;
9452 stub_sec->reloc_count = 0;
9453 stub_sec->flags &= ~SEC_RELOC;
9454 }
9455
9456 htab->brlt->size = 0;
9457 htab->brlt->reloc_count = 0;
9458 htab->brlt->flags &= ~SEC_RELOC;
9459 if (htab->relbrlt != NULL)
9460 htab->relbrlt->size = 0;
9461
9462 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9463
9464 for (stub_sec = htab->stub_bfd->sections;
9465 stub_sec != NULL;
9466 stub_sec = stub_sec->next)
9467 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9468 && stub_sec->rawsize != stub_sec->size)
9469 break;
9470
9471 /* Exit from this loop when no stubs have been added, and no stubs
9472 have changed size. */
9473 if (stub_sec == NULL)
9474 break;
9475
9476 /* Ask the linker to do its stuff. */
9477 (*htab->layout_sections_again) ();
9478 }
9479
9480 /* It would be nice to strip htab->brlt from the output if the
9481 section is empty, but it's too late. If we strip sections here,
9482 the dynamic symbol table is corrupted since the section symbol
9483 for the stripped section isn't written. */
9484
9485 return TRUE;
9486 }
9487
9488 /* Called after we have determined section placement. If sections
9489 move, we'll be called again. Provide a value for TOCstart. */
9490
9491 bfd_vma
9492 ppc64_elf_toc (bfd *obfd)
9493 {
9494 asection *s;
9495 bfd_vma TOCstart;
9496
9497 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9498 order. The TOC starts where the first of these sections starts. */
9499 s = bfd_get_section_by_name (obfd, ".got");
9500 if (s == NULL)
9501 s = bfd_get_section_by_name (obfd, ".toc");
9502 if (s == NULL)
9503 s = bfd_get_section_by_name (obfd, ".tocbss");
9504 if (s == NULL)
9505 s = bfd_get_section_by_name (obfd, ".plt");
9506 if (s == NULL)
9507 {
9508 /* This may happen for
9509 o references to TOC base (SYM@toc / TOC[tc0]) without a
9510 .toc directive
9511 o bad linker script
9512 o --gc-sections and empty TOC sections
9513
9514 FIXME: Warn user? */
9515
9516 /* Look for a likely section. We probably won't even be
9517 using TOCstart. */
9518 for (s = obfd->sections; s != NULL; s = s->next)
9519 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9520 == (SEC_ALLOC | SEC_SMALL_DATA))
9521 break;
9522 if (s == NULL)
9523 for (s = obfd->sections; s != NULL; s = s->next)
9524 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9525 == (SEC_ALLOC | SEC_SMALL_DATA))
9526 break;
9527 if (s == NULL)
9528 for (s = obfd->sections; s != NULL; s = s->next)
9529 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9530 break;
9531 if (s == NULL)
9532 for (s = obfd->sections; s != NULL; s = s->next)
9533 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9534 break;
9535 }
9536
9537 TOCstart = 0;
9538 if (s != NULL)
9539 TOCstart = s->output_section->vma + s->output_offset;
9540
9541 return TOCstart;
9542 }
9543
9544 /* Build all the stubs associated with the current output file.
9545 The stubs are kept in a hash table attached to the main linker
9546 hash table. This function is called via gldelf64ppc_finish. */
9547
9548 bfd_boolean
9549 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9550 struct bfd_link_info *info,
9551 char **stats)
9552 {
9553 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9554 asection *stub_sec;
9555 bfd_byte *p;
9556 int stub_sec_count = 0;
9557
9558 htab->emit_stub_syms = emit_stub_syms;
9559
9560 /* Allocate memory to hold the linker stubs. */
9561 for (stub_sec = htab->stub_bfd->sections;
9562 stub_sec != NULL;
9563 stub_sec = stub_sec->next)
9564 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9565 && stub_sec->size != 0)
9566 {
9567 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9568 if (stub_sec->contents == NULL)
9569 return FALSE;
9570 /* We want to check that built size is the same as calculated
9571 size. rawsize is a convenient location to use. */
9572 stub_sec->rawsize = stub_sec->size;
9573 stub_sec->size = 0;
9574 }
9575
9576 if (htab->glink != NULL && htab->glink->size != 0)
9577 {
9578 unsigned int indx;
9579 bfd_vma plt0;
9580
9581 /* Build the .glink plt call stub. */
9582 if (htab->emit_stub_syms)
9583 {
9584 struct elf_link_hash_entry *h;
9585 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9586 if (h == NULL)
9587 return FALSE;
9588 if (h->root.type == bfd_link_hash_new)
9589 {
9590 h->root.type = bfd_link_hash_defined;
9591 h->root.u.def.section = htab->glink;
9592 h->root.u.def.value = 8;
9593 h->ref_regular = 1;
9594 h->def_regular = 1;
9595 h->ref_regular_nonweak = 1;
9596 h->forced_local = 1;
9597 h->non_elf = 0;
9598 }
9599 }
9600 p = htab->glink->contents;
9601 plt0 = (htab->plt->output_section->vma
9602 + htab->plt->output_offset
9603 - (htab->glink->output_section->vma
9604 + htab->glink->output_offset
9605 + 16));
9606 bfd_put_64 (htab->glink->owner, plt0, p);
9607 p += 8;
9608 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9609 p += 4;
9610 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9611 p += 4;
9612 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9613 p += 4;
9614 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9615 p += 4;
9616 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9617 p += 4;
9618 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9619 p += 4;
9620 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9621 p += 4;
9622 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9623 p += 4;
9624 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9625 p += 4;
9626 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9627 p += 4;
9628 bfd_put_32 (htab->glink->owner, BCTR, p);
9629 p += 4;
9630 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9631 {
9632 bfd_put_32 (htab->glink->owner, NOP, p);
9633 p += 4;
9634 }
9635
9636 /* Build the .glink lazy link call stubs. */
9637 indx = 0;
9638 while (p < htab->glink->contents + htab->glink->size)
9639 {
9640 if (indx < 0x8000)
9641 {
9642 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9643 p += 4;
9644 }
9645 else
9646 {
9647 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9648 p += 4;
9649 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9650 p += 4;
9651 }
9652 bfd_put_32 (htab->glink->owner,
9653 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9654 indx++;
9655 p += 4;
9656 }
9657 htab->glink->rawsize = p - htab->glink->contents;
9658 }
9659
9660 if (htab->brlt->size != 0)
9661 {
9662 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9663 htab->brlt->size);
9664 if (htab->brlt->contents == NULL)
9665 return FALSE;
9666 }
9667 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9668 {
9669 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9670 htab->relbrlt->size);
9671 if (htab->relbrlt->contents == NULL)
9672 return FALSE;
9673 }
9674
9675 /* Build the stubs as directed by the stub hash table. */
9676 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9677
9678 if (htab->relbrlt != NULL)
9679 htab->relbrlt->reloc_count = 0;
9680
9681 for (stub_sec = htab->stub_bfd->sections;
9682 stub_sec != NULL;
9683 stub_sec = stub_sec->next)
9684 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9685 {
9686 stub_sec_count += 1;
9687 if (stub_sec->rawsize != stub_sec->size)
9688 break;
9689 }
9690
9691 if (stub_sec != NULL
9692 || htab->glink->rawsize != htab->glink->size)
9693 {
9694 htab->stub_error = TRUE;
9695 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9696 }
9697
9698 if (htab->stub_error)
9699 return FALSE;
9700
9701 if (stats != NULL)
9702 {
9703 *stats = bfd_malloc (500);
9704 if (*stats == NULL)
9705 return FALSE;
9706
9707 sprintf (*stats, _("linker stubs in %u group%s\n"
9708 " branch %lu\n"
9709 " toc adjust %lu\n"
9710 " long branch %lu\n"
9711 " long toc adj %lu\n"
9712 " plt call %lu"),
9713 stub_sec_count,
9714 stub_sec_count == 1 ? "" : "s",
9715 htab->stub_count[ppc_stub_long_branch - 1],
9716 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9717 htab->stub_count[ppc_stub_plt_branch - 1],
9718 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9719 htab->stub_count[ppc_stub_plt_call - 1]);
9720 }
9721 return TRUE;
9722 }
9723
9724 /* This function undoes the changes made by add_symbol_adjust. */
9725
9726 static bfd_boolean
9727 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9728 {
9729 struct ppc_link_hash_entry *eh;
9730
9731 if (h->root.type == bfd_link_hash_indirect)
9732 return TRUE;
9733
9734 if (h->root.type == bfd_link_hash_warning)
9735 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9736
9737 eh = (struct ppc_link_hash_entry *) h;
9738 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9739 return TRUE;
9740
9741 eh->elf.root.type = bfd_link_hash_undefined;
9742 return TRUE;
9743 }
9744
9745 void
9746 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9747 {
9748 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9749 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9750 }
9751
9752 /* What to do when ld finds relocations against symbols defined in
9753 discarded sections. */
9754
9755 static unsigned int
9756 ppc64_elf_action_discarded (asection *sec)
9757 {
9758 if (strcmp (".opd", sec->name) == 0)
9759 return 0;
9760
9761 if (strcmp (".toc", sec->name) == 0)
9762 return 0;
9763
9764 if (strcmp (".toc1", sec->name) == 0)
9765 return 0;
9766
9767 return _bfd_elf_default_action_discarded (sec);
9768 }
9769
9770 /* The RELOCATE_SECTION function is called by the ELF backend linker
9771 to handle the relocations for a section.
9772
9773 The relocs are always passed as Rela structures; if the section
9774 actually uses Rel structures, the r_addend field will always be
9775 zero.
9776
9777 This function is responsible for adjust the section contents as
9778 necessary, and (if using Rela relocs and generating a
9779 relocatable output file) adjusting the reloc addend as
9780 necessary.
9781
9782 This function does not have to worry about setting the reloc
9783 address or the reloc symbol index.
9784
9785 LOCAL_SYMS is a pointer to the swapped in local symbols.
9786
9787 LOCAL_SECTIONS is an array giving the section in the input file
9788 corresponding to the st_shndx field of each local symbol.
9789
9790 The global hash table entry for the global symbols can be found
9791 via elf_sym_hashes (input_bfd).
9792
9793 When generating relocatable output, this function must handle
9794 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9795 going to be the section symbol corresponding to the output
9796 section, which means that the addend must be adjusted
9797 accordingly. */
9798
9799 static bfd_boolean
9800 ppc64_elf_relocate_section (bfd *output_bfd,
9801 struct bfd_link_info *info,
9802 bfd *input_bfd,
9803 asection *input_section,
9804 bfd_byte *contents,
9805 Elf_Internal_Rela *relocs,
9806 Elf_Internal_Sym *local_syms,
9807 asection **local_sections)
9808 {
9809 struct ppc_link_hash_table *htab;
9810 Elf_Internal_Shdr *symtab_hdr;
9811 struct elf_link_hash_entry **sym_hashes;
9812 Elf_Internal_Rela *rel;
9813 Elf_Internal_Rela *relend;
9814 Elf_Internal_Rela outrel;
9815 bfd_byte *loc;
9816 struct got_entry **local_got_ents;
9817 bfd_vma TOCstart;
9818 bfd_boolean ret = TRUE;
9819 bfd_boolean is_opd;
9820 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9821 bfd_boolean is_power4 = FALSE;
9822 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
9823
9824 /* Initialize howto table if needed. */
9825 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9826 ppc_howto_init ();
9827
9828 htab = ppc_hash_table (info);
9829
9830 /* Don't relocate stub sections. */
9831 if (input_section->owner == htab->stub_bfd)
9832 return TRUE;
9833
9834 local_got_ents = elf_local_got_ents (input_bfd);
9835 TOCstart = elf_gp (output_bfd);
9836 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9837 sym_hashes = elf_sym_hashes (input_bfd);
9838 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
9839
9840 rel = relocs;
9841 relend = relocs + input_section->reloc_count;
9842 for (; rel < relend; rel++)
9843 {
9844 enum elf_ppc64_reloc_type r_type;
9845 bfd_vma addend, orig_addend;
9846 bfd_reloc_status_type r;
9847 Elf_Internal_Sym *sym;
9848 asection *sec;
9849 struct elf_link_hash_entry *h_elf;
9850 struct ppc_link_hash_entry *h;
9851 struct ppc_link_hash_entry *fdh;
9852 const char *sym_name;
9853 unsigned long r_symndx, toc_symndx;
9854 char tls_mask, tls_gd, tls_type;
9855 char sym_type;
9856 bfd_vma relocation;
9857 bfd_boolean unresolved_reloc;
9858 bfd_boolean warned;
9859 unsigned long insn, mask;
9860 struct ppc_stub_hash_entry *stub_entry;
9861 bfd_vma max_br_offset;
9862 bfd_vma from;
9863
9864 r_type = ELF64_R_TYPE (rel->r_info);
9865 r_symndx = ELF64_R_SYM (rel->r_info);
9866
9867 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9868 symbol of the previous ADDR64 reloc. The symbol gives us the
9869 proper TOC base to use. */
9870 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9871 && rel != relocs
9872 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9873 && is_opd)
9874 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9875
9876 sym = NULL;
9877 sec = NULL;
9878 h_elf = NULL;
9879 sym_name = NULL;
9880 unresolved_reloc = FALSE;
9881 warned = FALSE;
9882 orig_addend = rel->r_addend;
9883
9884 if (r_symndx < symtab_hdr->sh_info)
9885 {
9886 /* It's a local symbol. */
9887 long *opd_adjust;
9888
9889 sym = local_syms + r_symndx;
9890 sec = local_sections[r_symndx];
9891 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9892 sym_type = ELF64_ST_TYPE (sym->st_info);
9893 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9894 opd_adjust = get_opd_info (sec);
9895 if (opd_adjust != NULL)
9896 {
9897 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9898 if (adjust == -1)
9899 relocation = 0;
9900 else
9901 {
9902 /* If this is a relocation against the opd section sym
9903 and we have edited .opd, adjust the reloc addend so
9904 that ld -r and ld --emit-relocs output is correct.
9905 If it is a reloc against some other .opd symbol,
9906 then the symbol value will be adjusted later. */
9907 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9908 rel->r_addend += adjust;
9909 else
9910 relocation += adjust;
9911 }
9912 }
9913 if (info->relocatable)
9914 continue;
9915 }
9916 else
9917 {
9918 if (info->relocatable)
9919 continue;
9920 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9921 r_symndx, symtab_hdr, sym_hashes,
9922 h_elf, sec, relocation,
9923 unresolved_reloc, warned);
9924 sym_name = h_elf->root.root.string;
9925 sym_type = h_elf->type;
9926 }
9927 h = (struct ppc_link_hash_entry *) h_elf;
9928
9929 /* TLS optimizations. Replace instruction sequences and relocs
9930 based on information we collected in tls_optimize. We edit
9931 RELOCS so that --emit-relocs will output something sensible
9932 for the final instruction stream. */
9933 tls_mask = 0;
9934 tls_gd = 0;
9935 toc_symndx = 0;
9936 if (IS_PPC64_TLS_RELOC (r_type))
9937 {
9938 if (h != NULL)
9939 tls_mask = h->tls_mask;
9940 else if (local_got_ents != NULL)
9941 {
9942 char *lgot_masks;
9943 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9944 tls_mask = lgot_masks[r_symndx];
9945 }
9946 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9947 {
9948 /* Check for toc tls entries. */
9949 char *toc_tls;
9950
9951 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9952 rel, input_bfd))
9953 return FALSE;
9954
9955 if (toc_tls)
9956 tls_mask = *toc_tls;
9957 }
9958 }
9959
9960 /* Check that tls relocs are used with tls syms, and non-tls
9961 relocs are used with non-tls syms. */
9962 if (r_symndx != 0
9963 && r_type != R_PPC64_NONE
9964 && (h == NULL
9965 || h->elf.root.type == bfd_link_hash_defined
9966 || h->elf.root.type == bfd_link_hash_defweak)
9967 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9968 {
9969 if (r_type == R_PPC64_TLS && tls_mask != 0)
9970 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9971 ;
9972 else
9973 (*_bfd_error_handler)
9974 (sym_type == STT_TLS
9975 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9976 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9977 input_bfd,
9978 input_section,
9979 (long) rel->r_offset,
9980 ppc64_elf_howto_table[r_type]->name,
9981 sym_name);
9982 }
9983
9984 /* Ensure reloc mapping code below stays sane. */
9985 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9986 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9987 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9988 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9989 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9990 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9991 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9992 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9993 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9994 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9995 abort ();
9996
9997 switch (r_type)
9998 {
9999 default:
10000 break;
10001
10002 case R_PPC64_TOC16:
10003 case R_PPC64_TOC16_LO:
10004 case R_PPC64_TOC16_DS:
10005 case R_PPC64_TOC16_LO_DS:
10006 {
10007 /* Check for toc tls entries. */
10008 char *toc_tls;
10009 int retval;
10010
10011 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10012 rel, input_bfd);
10013 if (retval == 0)
10014 return FALSE;
10015
10016 if (toc_tls)
10017 {
10018 tls_mask = *toc_tls;
10019 if (r_type == R_PPC64_TOC16_DS
10020 || r_type == R_PPC64_TOC16_LO_DS)
10021 {
10022 if (tls_mask != 0
10023 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10024 goto toctprel;
10025 }
10026 else
10027 {
10028 /* If we found a GD reloc pair, then we might be
10029 doing a GD->IE transition. */
10030 if (retval == 2)
10031 {
10032 tls_gd = TLS_TPRELGD;
10033 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10034 goto tls_get_addr_check;
10035 }
10036 else if (retval == 3)
10037 {
10038 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10039 goto tls_get_addr_check;
10040 }
10041 }
10042 }
10043 }
10044 break;
10045
10046 case R_PPC64_GOT_TPREL16_DS:
10047 case R_PPC64_GOT_TPREL16_LO_DS:
10048 if (tls_mask != 0
10049 && (tls_mask & TLS_TPREL) == 0)
10050 {
10051 toctprel:
10052 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10053 insn &= 31 << 21;
10054 insn |= 0x3c0d0000; /* addis 0,13,0 */
10055 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10056 r_type = R_PPC64_TPREL16_HA;
10057 if (toc_symndx != 0)
10058 {
10059 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10060 /* We changed the symbol. Start over in order to
10061 get h, sym, sec etc. right. */
10062 rel--;
10063 continue;
10064 }
10065 else
10066 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10067 }
10068 break;
10069
10070 case R_PPC64_TLS:
10071 if (tls_mask != 0
10072 && (tls_mask & TLS_TPREL) == 0)
10073 {
10074 bfd_vma rtra;
10075 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10076 if ((insn & ((0x3f << 26) | (31 << 11)))
10077 == ((31 << 26) | (13 << 11)))
10078 rtra = insn & ((1 << 26) - (1 << 16));
10079 else if ((insn & ((0x3f << 26) | (31 << 16)))
10080 == ((31 << 26) | (13 << 16)))
10081 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10082 else
10083 abort ();
10084 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10085 /* add -> addi. */
10086 insn = 14 << 26;
10087 else if ((insn & (31 << 1)) == 23 << 1
10088 && ((insn & (31 << 6)) < 14 << 6
10089 || ((insn & (31 << 6)) >= 16 << 6
10090 && (insn & (31 << 6)) < 24 << 6)))
10091 /* load and store indexed -> dform. */
10092 insn = (32 | ((insn >> 6) & 31)) << 26;
10093 else if ((insn & (31 << 1)) == 21 << 1
10094 && (insn & (0x1a << 6)) == 0)
10095 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10096 insn = (((58 | ((insn >> 6) & 4)) << 26)
10097 | ((insn >> 6) & 1));
10098 else if ((insn & (31 << 1)) == 21 << 1
10099 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10100 /* lwax -> lwa. */
10101 insn = (58 << 26) | 2;
10102 else
10103 abort ();
10104 insn |= rtra;
10105 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10106 /* Was PPC64_TLS which sits on insn boundary, now
10107 PPC64_TPREL16_LO which is at low-order half-word. */
10108 rel->r_offset += d_offset;
10109 r_type = R_PPC64_TPREL16_LO;
10110 if (toc_symndx != 0)
10111 {
10112 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10113 /* We changed the symbol. Start over in order to
10114 get h, sym, sec etc. right. */
10115 rel--;
10116 continue;
10117 }
10118 else
10119 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10120 }
10121 break;
10122
10123 case R_PPC64_GOT_TLSGD16_HI:
10124 case R_PPC64_GOT_TLSGD16_HA:
10125 tls_gd = TLS_TPRELGD;
10126 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10127 goto tls_gdld_hi;
10128 break;
10129
10130 case R_PPC64_GOT_TLSLD16_HI:
10131 case R_PPC64_GOT_TLSLD16_HA:
10132 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10133 {
10134 tls_gdld_hi:
10135 if ((tls_mask & tls_gd) != 0)
10136 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10137 + R_PPC64_GOT_TPREL16_DS);
10138 else
10139 {
10140 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10141 rel->r_offset -= d_offset;
10142 r_type = R_PPC64_NONE;
10143 }
10144 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10145 }
10146 break;
10147
10148 case R_PPC64_GOT_TLSGD16:
10149 case R_PPC64_GOT_TLSGD16_LO:
10150 tls_gd = TLS_TPRELGD;
10151 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10152 goto tls_get_addr_check;
10153 break;
10154
10155 case R_PPC64_GOT_TLSLD16:
10156 case R_PPC64_GOT_TLSLD16_LO:
10157 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10158 {
10159 tls_get_addr_check:
10160 if (rel + 1 < relend)
10161 {
10162 enum elf_ppc64_reloc_type r_type2;
10163 unsigned long r_symndx2;
10164 struct elf_link_hash_entry *h2;
10165 bfd_vma insn1, insn2, insn3;
10166 bfd_vma offset;
10167
10168 /* The next instruction should be a call to
10169 __tls_get_addr. Peek at the reloc to be sure. */
10170 r_type2 = ELF64_R_TYPE (rel[1].r_info);
10171 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
10172 if (r_symndx2 < symtab_hdr->sh_info
10173 || (r_type2 != R_PPC64_REL14
10174 && r_type2 != R_PPC64_REL14_BRTAKEN
10175 && r_type2 != R_PPC64_REL14_BRNTAKEN
10176 && r_type2 != R_PPC64_REL24))
10177 break;
10178
10179 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
10180 while (h2->root.type == bfd_link_hash_indirect
10181 || h2->root.type == bfd_link_hash_warning)
10182 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
10183 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
10184 && h2 != &htab->tls_get_addr_fd->elf))
10185 break;
10186
10187 /* OK, it checks out. Replace the call. */
10188 offset = rel[1].r_offset;
10189 insn1 = bfd_get_32 (output_bfd,
10190 contents + rel->r_offset - d_offset);
10191 insn3 = bfd_get_32 (output_bfd,
10192 contents + offset + 4);
10193 if ((tls_mask & tls_gd) != 0)
10194 {
10195 /* IE */
10196 insn1 &= (1 << 26) - (1 << 2);
10197 insn1 |= 58 << 26; /* ld */
10198 insn2 = 0x7c636a14; /* add 3,3,13 */
10199 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
10200 if ((tls_mask & TLS_EXPLICIT) == 0)
10201 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10202 + R_PPC64_GOT_TPREL16_DS);
10203 else
10204 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10205 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10206 }
10207 else
10208 {
10209 /* LE */
10210 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10211 insn2 = 0x38630000; /* addi 3,3,0 */
10212 if (tls_gd == 0)
10213 {
10214 /* Was an LD reloc. */
10215 r_symndx = 0;
10216 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10217 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10218 }
10219 else if (toc_symndx != 0)
10220 r_symndx = toc_symndx;
10221 r_type = R_PPC64_TPREL16_HA;
10222 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10223 rel[1].r_info = ELF64_R_INFO (r_symndx,
10224 R_PPC64_TPREL16_LO);
10225 rel[1].r_offset += d_offset;
10226 }
10227 if (insn3 == NOP
10228 || insn3 == CROR_151515 || insn3 == CROR_313131)
10229 {
10230 insn3 = insn2;
10231 insn2 = NOP;
10232 rel[1].r_offset += 4;
10233 }
10234 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
10235 bfd_put_32 (output_bfd, insn2, contents + offset);
10236 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10237 if (tls_gd == 0 || toc_symndx != 0)
10238 {
10239 /* We changed the symbol. Start over in order
10240 to get h, sym, sec etc. right. */
10241 rel--;
10242 continue;
10243 }
10244 }
10245 }
10246 break;
10247
10248 case R_PPC64_DTPMOD64:
10249 if (rel + 1 < relend
10250 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10251 && rel[1].r_offset == rel->r_offset + 8)
10252 {
10253 if ((tls_mask & TLS_GD) == 0)
10254 {
10255 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10256 if ((tls_mask & TLS_TPRELGD) != 0)
10257 r_type = R_PPC64_TPREL64;
10258 else
10259 {
10260 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10261 r_type = R_PPC64_NONE;
10262 }
10263 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10264 }
10265 }
10266 else
10267 {
10268 if ((tls_mask & TLS_LD) == 0)
10269 {
10270 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10271 r_type = R_PPC64_NONE;
10272 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10273 }
10274 }
10275 break;
10276
10277 case R_PPC64_TPREL64:
10278 if ((tls_mask & TLS_TPREL) == 0)
10279 {
10280 r_type = R_PPC64_NONE;
10281 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10282 }
10283 break;
10284 }
10285
10286 /* Handle other relocations that tweak non-addend part of insn. */
10287 insn = 0;
10288 max_br_offset = 1 << 25;
10289 addend = rel->r_addend;
10290 switch (r_type)
10291 {
10292 default:
10293 break;
10294
10295 /* Branch taken prediction relocations. */
10296 case R_PPC64_ADDR14_BRTAKEN:
10297 case R_PPC64_REL14_BRTAKEN:
10298 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10299 /* Fall thru. */
10300
10301 /* Branch not taken prediction relocations. */
10302 case R_PPC64_ADDR14_BRNTAKEN:
10303 case R_PPC64_REL14_BRNTAKEN:
10304 insn |= bfd_get_32 (output_bfd,
10305 contents + rel->r_offset) & ~(0x01 << 21);
10306 /* Fall thru. */
10307
10308 case R_PPC64_REL14:
10309 max_br_offset = 1 << 15;
10310 /* Fall thru. */
10311
10312 case R_PPC64_REL24:
10313 /* Calls to functions with a different TOC, such as calls to
10314 shared objects, need to alter the TOC pointer. This is
10315 done using a linkage stub. A REL24 branching to these
10316 linkage stubs needs to be followed by a nop, as the nop
10317 will be replaced with an instruction to restore the TOC
10318 base pointer. */
10319 stub_entry = NULL;
10320 fdh = h;
10321 if (((h != NULL
10322 && (((fdh = h->oh) != NULL
10323 && fdh->elf.plt.plist != NULL)
10324 || (fdh = h)->elf.plt.plist != NULL))
10325 || (sec != NULL
10326 && sec->output_section != NULL
10327 && sec->id <= htab->top_id
10328 && (htab->stub_group[sec->id].toc_off
10329 != htab->stub_group[input_section->id].toc_off)))
10330 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10331 rel, htab)) != NULL
10332 && (stub_entry->stub_type == ppc_stub_plt_call
10333 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10334 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10335 {
10336 bfd_boolean can_plt_call = FALSE;
10337
10338 if (rel->r_offset + 8 <= input_section->size)
10339 {
10340 unsigned long nop;
10341 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10342 if (nop == NOP
10343 || nop == CROR_151515 || nop == CROR_313131)
10344 {
10345 bfd_put_32 (input_bfd, LD_R2_40R1,
10346 contents + rel->r_offset + 4);
10347 can_plt_call = TRUE;
10348 }
10349 }
10350
10351 if (!can_plt_call)
10352 {
10353 if (stub_entry->stub_type == ppc_stub_plt_call)
10354 {
10355 /* If this is a plain branch rather than a branch
10356 and link, don't require a nop. However, don't
10357 allow tail calls in a shared library as they
10358 will result in r2 being corrupted. */
10359 unsigned long br;
10360 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10361 if (info->executable && (br & 1) == 0)
10362 can_plt_call = TRUE;
10363 else
10364 stub_entry = NULL;
10365 }
10366 else if (h != NULL
10367 && strcmp (h->elf.root.root.string,
10368 ".__libc_start_main") == 0)
10369 {
10370 /* Allow crt1 branch to go via a toc adjusting stub. */
10371 can_plt_call = TRUE;
10372 }
10373 else
10374 {
10375 if (strcmp (input_section->output_section->name,
10376 ".init") == 0
10377 || strcmp (input_section->output_section->name,
10378 ".fini") == 0)
10379 (*_bfd_error_handler)
10380 (_("%B(%A+0x%lx): automatic multiple TOCs "
10381 "not supported using your crt files; "
10382 "recompile with -mminimal-toc or upgrade gcc"),
10383 input_bfd,
10384 input_section,
10385 (long) rel->r_offset);
10386 else
10387 (*_bfd_error_handler)
10388 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10389 "does not allow automatic multiple TOCs; "
10390 "recompile with -mminimal-toc or "
10391 "-fno-optimize-sibling-calls, "
10392 "or make `%s' extern"),
10393 input_bfd,
10394 input_section,
10395 (long) rel->r_offset,
10396 sym_name,
10397 sym_name);
10398 bfd_set_error (bfd_error_bad_value);
10399 ret = FALSE;
10400 }
10401 }
10402
10403 if (can_plt_call
10404 && stub_entry->stub_type == ppc_stub_plt_call)
10405 unresolved_reloc = FALSE;
10406 }
10407
10408 if (stub_entry == NULL
10409 && get_opd_info (sec) != NULL)
10410 {
10411 /* The branch destination is the value of the opd entry. */
10412 bfd_vma off = (relocation + addend
10413 - sec->output_section->vma
10414 - sec->output_offset);
10415 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10416 if (dest != (bfd_vma) -1)
10417 {
10418 relocation = dest;
10419 addend = 0;
10420 }
10421 }
10422
10423 /* If the branch is out of reach we ought to have a long
10424 branch stub. */
10425 from = (rel->r_offset
10426 + input_section->output_offset
10427 + input_section->output_section->vma);
10428
10429 if (stub_entry == NULL
10430 && (relocation + addend - from + max_br_offset
10431 >= 2 * max_br_offset)
10432 && r_type != R_PPC64_ADDR14_BRTAKEN
10433 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10434 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10435 htab);
10436
10437 if (stub_entry != NULL)
10438 {
10439 /* Munge up the value and addend so that we call the stub
10440 rather than the procedure directly. */
10441 relocation = (stub_entry->stub_offset
10442 + stub_entry->stub_sec->output_offset
10443 + stub_entry->stub_sec->output_section->vma);
10444 addend = 0;
10445 }
10446
10447 if (insn != 0)
10448 {
10449 if (is_power4)
10450 {
10451 /* Set 'a' bit. This is 0b00010 in BO field for branch
10452 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10453 for branch on CTR insns (BO == 1a00t or 1a01t). */
10454 if ((insn & (0x14 << 21)) == (0x04 << 21))
10455 insn |= 0x02 << 21;
10456 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10457 insn |= 0x08 << 21;
10458 else
10459 break;
10460 }
10461 else
10462 {
10463 /* Invert 'y' bit if not the default. */
10464 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10465 insn ^= 0x01 << 21;
10466 }
10467
10468 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10469 }
10470
10471 /* NOP out calls to undefined weak functions.
10472 We can thus call a weak function without first
10473 checking whether the function is defined. */
10474 else if (h != NULL
10475 && h->elf.root.type == bfd_link_hash_undefweak
10476 && r_type == R_PPC64_REL24
10477 && relocation == 0
10478 && addend == 0)
10479 {
10480 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10481 continue;
10482 }
10483 break;
10484 }
10485
10486 /* Set `addend'. */
10487 tls_type = 0;
10488 switch (r_type)
10489 {
10490 default:
10491 (*_bfd_error_handler)
10492 (_("%B: unknown relocation type %d for symbol %s"),
10493 input_bfd, (int) r_type, sym_name);
10494
10495 bfd_set_error (bfd_error_bad_value);
10496 ret = FALSE;
10497 continue;
10498
10499 case R_PPC64_NONE:
10500 case R_PPC64_TLS:
10501 case R_PPC64_GNU_VTINHERIT:
10502 case R_PPC64_GNU_VTENTRY:
10503 continue;
10504
10505 /* GOT16 relocations. Like an ADDR16 using the symbol's
10506 address in the GOT as relocation value instead of the
10507 symbol's value itself. Also, create a GOT entry for the
10508 symbol and put the symbol value there. */
10509 case R_PPC64_GOT_TLSGD16:
10510 case R_PPC64_GOT_TLSGD16_LO:
10511 case R_PPC64_GOT_TLSGD16_HI:
10512 case R_PPC64_GOT_TLSGD16_HA:
10513 tls_type = TLS_TLS | TLS_GD;
10514 goto dogot;
10515
10516 case R_PPC64_GOT_TLSLD16:
10517 case R_PPC64_GOT_TLSLD16_LO:
10518 case R_PPC64_GOT_TLSLD16_HI:
10519 case R_PPC64_GOT_TLSLD16_HA:
10520 tls_type = TLS_TLS | TLS_LD;
10521 goto dogot;
10522
10523 case R_PPC64_GOT_TPREL16_DS:
10524 case R_PPC64_GOT_TPREL16_LO_DS:
10525 case R_PPC64_GOT_TPREL16_HI:
10526 case R_PPC64_GOT_TPREL16_HA:
10527 tls_type = TLS_TLS | TLS_TPREL;
10528 goto dogot;
10529
10530 case R_PPC64_GOT_DTPREL16_DS:
10531 case R_PPC64_GOT_DTPREL16_LO_DS:
10532 case R_PPC64_GOT_DTPREL16_HI:
10533 case R_PPC64_GOT_DTPREL16_HA:
10534 tls_type = TLS_TLS | TLS_DTPREL;
10535 goto dogot;
10536
10537 case R_PPC64_GOT16:
10538 case R_PPC64_GOT16_LO:
10539 case R_PPC64_GOT16_HI:
10540 case R_PPC64_GOT16_HA:
10541 case R_PPC64_GOT16_DS:
10542 case R_PPC64_GOT16_LO_DS:
10543 dogot:
10544 {
10545 /* Relocation is to the entry for this symbol in the global
10546 offset table. */
10547 asection *got;
10548 bfd_vma *offp;
10549 bfd_vma off;
10550 unsigned long indx = 0;
10551
10552 if (tls_type == (TLS_TLS | TLS_LD)
10553 && (h == NULL
10554 || !h->elf.def_dynamic))
10555 offp = &ppc64_tlsld_got (input_bfd)->offset;
10556 else
10557 {
10558 struct got_entry *ent;
10559
10560 if (h != NULL)
10561 {
10562 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10563 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10564 &h->elf)
10565 || (info->shared
10566 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10567 /* This is actually a static link, or it is a
10568 -Bsymbolic link and the symbol is defined
10569 locally, or the symbol was forced to be local
10570 because of a version file. */
10571 ;
10572 else
10573 {
10574 indx = h->elf.dynindx;
10575 unresolved_reloc = FALSE;
10576 }
10577 ent = h->elf.got.glist;
10578 }
10579 else
10580 {
10581 if (local_got_ents == NULL)
10582 abort ();
10583 ent = local_got_ents[r_symndx];
10584 }
10585
10586 for (; ent != NULL; ent = ent->next)
10587 if (ent->addend == orig_addend
10588 && ent->owner == input_bfd
10589 && ent->tls_type == tls_type)
10590 break;
10591 if (ent == NULL)
10592 abort ();
10593 offp = &ent->got.offset;
10594 }
10595
10596 got = ppc64_elf_tdata (input_bfd)->got;
10597 if (got == NULL)
10598 abort ();
10599
10600 /* The offset must always be a multiple of 8. We use the
10601 least significant bit to record whether we have already
10602 processed this entry. */
10603 off = *offp;
10604 if ((off & 1) != 0)
10605 off &= ~1;
10606 else
10607 {
10608 /* Generate relocs for the dynamic linker, except in
10609 the case of TLSLD where we'll use one entry per
10610 module. */
10611 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10612
10613 *offp = off | 1;
10614 if ((info->shared || indx != 0)
10615 && (h == NULL
10616 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10617 || h->elf.root.type != bfd_link_hash_undefweak))
10618 {
10619 outrel.r_offset = (got->output_section->vma
10620 + got->output_offset
10621 + off);
10622 outrel.r_addend = addend;
10623 if (tls_type & (TLS_LD | TLS_GD))
10624 {
10625 outrel.r_addend = 0;
10626 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10627 if (tls_type == (TLS_TLS | TLS_GD))
10628 {
10629 loc = relgot->contents;
10630 loc += (relgot->reloc_count++
10631 * sizeof (Elf64_External_Rela));
10632 bfd_elf64_swap_reloca_out (output_bfd,
10633 &outrel, loc);
10634 outrel.r_offset += 8;
10635 outrel.r_addend = addend;
10636 outrel.r_info
10637 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10638 }
10639 }
10640 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10641 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10642 else if (tls_type == (TLS_TLS | TLS_TPREL))
10643 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10644 else if (indx == 0)
10645 {
10646 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10647
10648 /* Write the .got section contents for the sake
10649 of prelink. */
10650 loc = got->contents + off;
10651 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10652 loc);
10653 }
10654 else
10655 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10656
10657 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10658 {
10659 outrel.r_addend += relocation;
10660 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10661 outrel.r_addend -= htab->elf.tls_sec->vma;
10662 }
10663 loc = relgot->contents;
10664 loc += (relgot->reloc_count++
10665 * sizeof (Elf64_External_Rela));
10666 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10667 }
10668
10669 /* Init the .got section contents here if we're not
10670 emitting a reloc. */
10671 else
10672 {
10673 relocation += addend;
10674 if (tls_type == (TLS_TLS | TLS_LD))
10675 relocation = 1;
10676 else if (tls_type != 0)
10677 {
10678 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10679 if (tls_type == (TLS_TLS | TLS_TPREL))
10680 relocation += DTP_OFFSET - TP_OFFSET;
10681
10682 if (tls_type == (TLS_TLS | TLS_GD))
10683 {
10684 bfd_put_64 (output_bfd, relocation,
10685 got->contents + off + 8);
10686 relocation = 1;
10687 }
10688 }
10689
10690 bfd_put_64 (output_bfd, relocation,
10691 got->contents + off);
10692 }
10693 }
10694
10695 if (off >= (bfd_vma) -2)
10696 abort ();
10697
10698 relocation = got->output_offset + off;
10699
10700 /* TOC base (r2) is TOC start plus 0x8000. */
10701 addend = -TOC_BASE_OFF;
10702 }
10703 break;
10704
10705 case R_PPC64_PLT16_HA:
10706 case R_PPC64_PLT16_HI:
10707 case R_PPC64_PLT16_LO:
10708 case R_PPC64_PLT32:
10709 case R_PPC64_PLT64:
10710 /* Relocation is to the entry for this symbol in the
10711 procedure linkage table. */
10712
10713 /* Resolve a PLT reloc against a local symbol directly,
10714 without using the procedure linkage table. */
10715 if (h == NULL)
10716 break;
10717
10718 /* It's possible that we didn't make a PLT entry for this
10719 symbol. This happens when statically linking PIC code,
10720 or when using -Bsymbolic. Go find a match if there is a
10721 PLT entry. */
10722 if (htab->plt != NULL)
10723 {
10724 struct plt_entry *ent;
10725 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10726 if (ent->addend == orig_addend
10727 && ent->plt.offset != (bfd_vma) -1)
10728 {
10729 relocation = (htab->plt->output_section->vma
10730 + htab->plt->output_offset
10731 + ent->plt.offset);
10732 unresolved_reloc = FALSE;
10733 }
10734 }
10735 break;
10736
10737 case R_PPC64_TOC:
10738 /* Relocation value is TOC base. */
10739 relocation = TOCstart;
10740 if (r_symndx == 0)
10741 relocation += htab->stub_group[input_section->id].toc_off;
10742 else if (unresolved_reloc)
10743 ;
10744 else if (sec != NULL && sec->id <= htab->top_id)
10745 relocation += htab->stub_group[sec->id].toc_off;
10746 else
10747 unresolved_reloc = TRUE;
10748 goto dodyn2;
10749
10750 /* TOC16 relocs. We want the offset relative to the TOC base,
10751 which is the address of the start of the TOC plus 0x8000.
10752 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10753 in this order. */
10754 case R_PPC64_TOC16:
10755 case R_PPC64_TOC16_LO:
10756 case R_PPC64_TOC16_HI:
10757 case R_PPC64_TOC16_DS:
10758 case R_PPC64_TOC16_LO_DS:
10759 case R_PPC64_TOC16_HA:
10760 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10761 break;
10762
10763 /* Relocate against the beginning of the section. */
10764 case R_PPC64_SECTOFF:
10765 case R_PPC64_SECTOFF_LO:
10766 case R_PPC64_SECTOFF_HI:
10767 case R_PPC64_SECTOFF_DS:
10768 case R_PPC64_SECTOFF_LO_DS:
10769 case R_PPC64_SECTOFF_HA:
10770 if (sec != NULL)
10771 addend -= sec->output_section->vma;
10772 break;
10773
10774 case R_PPC64_REL14:
10775 case R_PPC64_REL14_BRNTAKEN:
10776 case R_PPC64_REL14_BRTAKEN:
10777 case R_PPC64_REL24:
10778 break;
10779
10780 case R_PPC64_TPREL16:
10781 case R_PPC64_TPREL16_LO:
10782 case R_PPC64_TPREL16_HI:
10783 case R_PPC64_TPREL16_HA:
10784 case R_PPC64_TPREL16_DS:
10785 case R_PPC64_TPREL16_LO_DS:
10786 case R_PPC64_TPREL16_HIGHER:
10787 case R_PPC64_TPREL16_HIGHERA:
10788 case R_PPC64_TPREL16_HIGHEST:
10789 case R_PPC64_TPREL16_HIGHESTA:
10790 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10791 if (info->shared)
10792 /* The TPREL16 relocs shouldn't really be used in shared
10793 libs as they will result in DT_TEXTREL being set, but
10794 support them anyway. */
10795 goto dodyn;
10796 break;
10797
10798 case R_PPC64_DTPREL16:
10799 case R_PPC64_DTPREL16_LO:
10800 case R_PPC64_DTPREL16_HI:
10801 case R_PPC64_DTPREL16_HA:
10802 case R_PPC64_DTPREL16_DS:
10803 case R_PPC64_DTPREL16_LO_DS:
10804 case R_PPC64_DTPREL16_HIGHER:
10805 case R_PPC64_DTPREL16_HIGHERA:
10806 case R_PPC64_DTPREL16_HIGHEST:
10807 case R_PPC64_DTPREL16_HIGHESTA:
10808 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10809 break;
10810
10811 case R_PPC64_DTPMOD64:
10812 relocation = 1;
10813 addend = 0;
10814 goto dodyn;
10815
10816 case R_PPC64_TPREL64:
10817 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10818 goto dodyn;
10819
10820 case R_PPC64_DTPREL64:
10821 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10822 /* Fall thru */
10823
10824 /* Relocations that may need to be propagated if this is a
10825 dynamic object. */
10826 case R_PPC64_REL30:
10827 case R_PPC64_REL32:
10828 case R_PPC64_REL64:
10829 case R_PPC64_ADDR14:
10830 case R_PPC64_ADDR14_BRNTAKEN:
10831 case R_PPC64_ADDR14_BRTAKEN:
10832 case R_PPC64_ADDR16:
10833 case R_PPC64_ADDR16_DS:
10834 case R_PPC64_ADDR16_HA:
10835 case R_PPC64_ADDR16_HI:
10836 case R_PPC64_ADDR16_HIGHER:
10837 case R_PPC64_ADDR16_HIGHERA:
10838 case R_PPC64_ADDR16_HIGHEST:
10839 case R_PPC64_ADDR16_HIGHESTA:
10840 case R_PPC64_ADDR16_LO:
10841 case R_PPC64_ADDR16_LO_DS:
10842 case R_PPC64_ADDR24:
10843 case R_PPC64_ADDR32:
10844 case R_PPC64_ADDR64:
10845 case R_PPC64_UADDR16:
10846 case R_PPC64_UADDR32:
10847 case R_PPC64_UADDR64:
10848 /* r_symndx will be zero only for relocs against symbols
10849 from removed linkonce sections, or sections discarded by
10850 a linker script. */
10851 dodyn:
10852 if (r_symndx == 0)
10853 {
10854 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10855 contents + rel->r_offset);
10856 break;
10857 }
10858 /* Fall thru. */
10859
10860 dodyn2:
10861 if ((input_section->flags & SEC_ALLOC) == 0)
10862 break;
10863
10864 if (NO_OPD_RELOCS && is_opd)
10865 break;
10866
10867 if ((info->shared
10868 && (h == NULL
10869 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10870 || h->elf.root.type != bfd_link_hash_undefweak)
10871 && (MUST_BE_DYN_RELOC (r_type)
10872 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10873 || (ELIMINATE_COPY_RELOCS
10874 && !info->shared
10875 && h != NULL
10876 && h->elf.dynindx != -1
10877 && !h->elf.non_got_ref
10878 && h->elf.def_dynamic
10879 && !h->elf.def_regular))
10880 {
10881 Elf_Internal_Rela outrel;
10882 bfd_boolean skip, relocate;
10883 asection *sreloc;
10884 bfd_byte *loc;
10885 bfd_vma out_off;
10886
10887 /* When generating a dynamic object, these relocations
10888 are copied into the output file to be resolved at run
10889 time. */
10890
10891 skip = FALSE;
10892 relocate = FALSE;
10893
10894 out_off = _bfd_elf_section_offset (output_bfd, info,
10895 input_section, rel->r_offset);
10896 if (out_off == (bfd_vma) -1)
10897 skip = TRUE;
10898 else if (out_off == (bfd_vma) -2)
10899 skip = TRUE, relocate = TRUE;
10900 out_off += (input_section->output_section->vma
10901 + input_section->output_offset);
10902 outrel.r_offset = out_off;
10903 outrel.r_addend = rel->r_addend;
10904
10905 /* Optimize unaligned reloc use. */
10906 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10907 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10908 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10909 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10910 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10911 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10912 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10913 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10914 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10915
10916 if (skip)
10917 memset (&outrel, 0, sizeof outrel);
10918 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10919 && !is_opd
10920 && r_type != R_PPC64_TOC)
10921 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10922 else
10923 {
10924 /* This symbol is local, or marked to become local,
10925 or this is an opd section reloc which must point
10926 at a local function. */
10927 outrel.r_addend += relocation;
10928 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10929 {
10930 if (is_opd && h != NULL)
10931 {
10932 /* Lie about opd entries. This case occurs
10933 when building shared libraries and we
10934 reference a function in another shared
10935 lib. The same thing happens for a weak
10936 definition in an application that's
10937 overridden by a strong definition in a
10938 shared lib. (I believe this is a generic
10939 bug in binutils handling of weak syms.)
10940 In these cases we won't use the opd
10941 entry in this lib. */
10942 unresolved_reloc = FALSE;
10943 }
10944 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10945
10946 /* We need to relocate .opd contents for ld.so.
10947 Prelink also wants simple and consistent rules
10948 for relocs. This make all RELATIVE relocs have
10949 *r_offset equal to r_addend. */
10950 relocate = TRUE;
10951 }
10952 else
10953 {
10954 long indx = 0;
10955
10956 if (bfd_is_abs_section (sec))
10957 ;
10958 else if (sec == NULL || sec->owner == NULL)
10959 {
10960 bfd_set_error (bfd_error_bad_value);
10961 return FALSE;
10962 }
10963 else
10964 {
10965 asection *osec;
10966
10967 osec = sec->output_section;
10968 indx = elf_section_data (osec)->dynindx;
10969
10970 if (indx == 0)
10971 {
10972 if ((osec->flags & SEC_READONLY) == 0
10973 && htab->elf.data_index_section != NULL)
10974 osec = htab->elf.data_index_section;
10975 else
10976 osec = htab->elf.text_index_section;
10977 indx = elf_section_data (osec)->dynindx;
10978 }
10979 BFD_ASSERT (indx != 0);
10980
10981 /* We are turning this relocation into one
10982 against a section symbol, so subtract out
10983 the output section's address but not the
10984 offset of the input section in the output
10985 section. */
10986 outrel.r_addend -= osec->vma;
10987 }
10988
10989 outrel.r_info = ELF64_R_INFO (indx, r_type);
10990 }
10991 }
10992
10993 sreloc = elf_section_data (input_section)->sreloc;
10994 if (sreloc == NULL)
10995 abort ();
10996
10997 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
10998 >= sreloc->size)
10999 abort ();
11000 loc = sreloc->contents;
11001 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11002 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11003
11004 /* If this reloc is against an external symbol, it will
11005 be computed at runtime, so there's no need to do
11006 anything now. However, for the sake of prelink ensure
11007 that the section contents are a known value. */
11008 if (! relocate)
11009 {
11010 unresolved_reloc = FALSE;
11011 /* The value chosen here is quite arbitrary as ld.so
11012 ignores section contents except for the special
11013 case of .opd where the contents might be accessed
11014 before relocation. Choose zero, as that won't
11015 cause reloc overflow. */
11016 relocation = 0;
11017 addend = 0;
11018 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11019 to improve backward compatibility with older
11020 versions of ld. */
11021 if (r_type == R_PPC64_ADDR64)
11022 addend = outrel.r_addend;
11023 /* Adjust pc_relative relocs to have zero in *r_offset. */
11024 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11025 addend = (input_section->output_section->vma
11026 + input_section->output_offset
11027 + rel->r_offset);
11028 }
11029 }
11030 break;
11031
11032 case R_PPC64_COPY:
11033 case R_PPC64_GLOB_DAT:
11034 case R_PPC64_JMP_SLOT:
11035 case R_PPC64_RELATIVE:
11036 /* We shouldn't ever see these dynamic relocs in relocatable
11037 files. */
11038 /* Fall through. */
11039
11040 case R_PPC64_PLTGOT16:
11041 case R_PPC64_PLTGOT16_DS:
11042 case R_PPC64_PLTGOT16_HA:
11043 case R_PPC64_PLTGOT16_HI:
11044 case R_PPC64_PLTGOT16_LO:
11045 case R_PPC64_PLTGOT16_LO_DS:
11046 case R_PPC64_PLTREL32:
11047 case R_PPC64_PLTREL64:
11048 /* These ones haven't been implemented yet. */
11049
11050 (*_bfd_error_handler)
11051 (_("%B: relocation %s is not supported for symbol %s."),
11052 input_bfd,
11053 ppc64_elf_howto_table[r_type]->name, sym_name);
11054
11055 bfd_set_error (bfd_error_invalid_operation);
11056 ret = FALSE;
11057 continue;
11058 }
11059
11060 /* Do any further special processing. */
11061 switch (r_type)
11062 {
11063 default:
11064 break;
11065
11066 case R_PPC64_ADDR16_HA:
11067 case R_PPC64_ADDR16_HIGHERA:
11068 case R_PPC64_ADDR16_HIGHESTA:
11069 case R_PPC64_TOC16_HA:
11070 case R_PPC64_SECTOFF_HA:
11071 case R_PPC64_TPREL16_HA:
11072 case R_PPC64_DTPREL16_HA:
11073 case R_PPC64_TPREL16_HIGHER:
11074 case R_PPC64_TPREL16_HIGHERA:
11075 case R_PPC64_TPREL16_HIGHEST:
11076 case R_PPC64_TPREL16_HIGHESTA:
11077 case R_PPC64_DTPREL16_HIGHER:
11078 case R_PPC64_DTPREL16_HIGHERA:
11079 case R_PPC64_DTPREL16_HIGHEST:
11080 case R_PPC64_DTPREL16_HIGHESTA:
11081 /* It's just possible that this symbol is a weak symbol
11082 that's not actually defined anywhere. In that case,
11083 'sec' would be NULL, and we should leave the symbol
11084 alone (it will be set to zero elsewhere in the link). */
11085 if (sec == NULL)
11086 break;
11087 /* Fall thru */
11088
11089 case R_PPC64_GOT16_HA:
11090 case R_PPC64_PLTGOT16_HA:
11091 case R_PPC64_PLT16_HA:
11092 case R_PPC64_GOT_TLSGD16_HA:
11093 case R_PPC64_GOT_TLSLD16_HA:
11094 case R_PPC64_GOT_TPREL16_HA:
11095 case R_PPC64_GOT_DTPREL16_HA:
11096 /* Add 0x10000 if sign bit in 0:15 is set.
11097 Bits 0:15 are not used. */
11098 addend += 0x8000;
11099 break;
11100
11101 case R_PPC64_ADDR16_DS:
11102 case R_PPC64_ADDR16_LO_DS:
11103 case R_PPC64_GOT16_DS:
11104 case R_PPC64_GOT16_LO_DS:
11105 case R_PPC64_PLT16_LO_DS:
11106 case R_PPC64_SECTOFF_DS:
11107 case R_PPC64_SECTOFF_LO_DS:
11108 case R_PPC64_TOC16_DS:
11109 case R_PPC64_TOC16_LO_DS:
11110 case R_PPC64_PLTGOT16_DS:
11111 case R_PPC64_PLTGOT16_LO_DS:
11112 case R_PPC64_GOT_TPREL16_DS:
11113 case R_PPC64_GOT_TPREL16_LO_DS:
11114 case R_PPC64_GOT_DTPREL16_DS:
11115 case R_PPC64_GOT_DTPREL16_LO_DS:
11116 case R_PPC64_TPREL16_DS:
11117 case R_PPC64_TPREL16_LO_DS:
11118 case R_PPC64_DTPREL16_DS:
11119 case R_PPC64_DTPREL16_LO_DS:
11120 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11121 mask = 3;
11122 /* If this reloc is against an lq insn, then the value must be
11123 a multiple of 16. This is somewhat of a hack, but the
11124 "correct" way to do this by defining _DQ forms of all the
11125 _DS relocs bloats all reloc switches in this file. It
11126 doesn't seem to make much sense to use any of these relocs
11127 in data, so testing the insn should be safe. */
11128 if ((insn & (0x3f << 26)) == (56u << 26))
11129 mask = 15;
11130 if (((relocation + addend) & mask) != 0)
11131 {
11132 (*_bfd_error_handler)
11133 (_("%B: error: relocation %s not a multiple of %d"),
11134 input_bfd,
11135 ppc64_elf_howto_table[r_type]->name,
11136 mask + 1);
11137 bfd_set_error (bfd_error_bad_value);
11138 ret = FALSE;
11139 continue;
11140 }
11141 break;
11142 }
11143
11144 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11145 because such sections are not SEC_ALLOC and thus ld.so will
11146 not process them. */
11147 if (unresolved_reloc
11148 && !((input_section->flags & SEC_DEBUGGING) != 0
11149 && h->elf.def_dynamic))
11150 {
11151 (*_bfd_error_handler)
11152 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11153 input_bfd,
11154 input_section,
11155 (long) rel->r_offset,
11156 ppc64_elf_howto_table[(int) r_type]->name,
11157 h->elf.root.root.string);
11158 ret = FALSE;
11159 }
11160
11161 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11162 input_bfd,
11163 input_section,
11164 contents,
11165 rel->r_offset,
11166 relocation,
11167 addend);
11168
11169 if (r != bfd_reloc_ok)
11170 {
11171 if (sym_name == NULL)
11172 sym_name = "(null)";
11173 if (r == bfd_reloc_overflow)
11174 {
11175 if (warned)
11176 continue;
11177 if (h != NULL
11178 && h->elf.root.type == bfd_link_hash_undefweak
11179 && ppc64_elf_howto_table[r_type]->pc_relative)
11180 {
11181 /* Assume this is a call protected by other code that
11182 detects the symbol is undefined. If this is the case,
11183 we can safely ignore the overflow. If not, the
11184 program is hosed anyway, and a little warning isn't
11185 going to help. */
11186
11187 continue;
11188 }
11189
11190 if (!((*info->callbacks->reloc_overflow)
11191 (info, (h ? &h->elf.root : NULL), sym_name,
11192 ppc64_elf_howto_table[r_type]->name,
11193 orig_addend, input_bfd, input_section, rel->r_offset)))
11194 return FALSE;
11195 }
11196 else
11197 {
11198 (*_bfd_error_handler)
11199 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11200 input_bfd,
11201 input_section,
11202 (long) rel->r_offset,
11203 ppc64_elf_howto_table[r_type]->name,
11204 sym_name,
11205 (int) r);
11206 ret = FALSE;
11207 }
11208 }
11209 }
11210
11211 /* If we're emitting relocations, then shortly after this function
11212 returns, reloc offsets and addends for this section will be
11213 adjusted. Worse, reloc symbol indices will be for the output
11214 file rather than the input. Save a copy of the relocs for
11215 opd_entry_value. */
11216 if (is_opd && (info->emitrelocations || info->relocatable))
11217 {
11218 bfd_size_type amt;
11219 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11220 rel = bfd_alloc (input_bfd, amt);
11221 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11222 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11223 if (rel == NULL)
11224 return FALSE;
11225 memcpy (rel, relocs, amt);
11226 }
11227 return ret;
11228 }
11229
11230 /* Adjust the value of any local symbols in opd sections. */
11231
11232 static bfd_boolean
11233 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11234 const char *name ATTRIBUTE_UNUSED,
11235 Elf_Internal_Sym *elfsym,
11236 asection *input_sec,
11237 struct elf_link_hash_entry *h)
11238 {
11239 long *opd_adjust, adjust;
11240 bfd_vma value;
11241
11242 if (h != NULL)
11243 return TRUE;
11244
11245 opd_adjust = get_opd_info (input_sec);
11246 if (opd_adjust == NULL)
11247 return TRUE;
11248
11249 value = elfsym->st_value - input_sec->output_offset;
11250 if (!info->relocatable)
11251 value -= input_sec->output_section->vma;
11252
11253 adjust = opd_adjust[value / 8];
11254 if (adjust == -1)
11255 elfsym->st_value = 0;
11256 else
11257 elfsym->st_value += adjust;
11258 return TRUE;
11259 }
11260
11261 /* Finish up dynamic symbol handling. We set the contents of various
11262 dynamic sections here. */
11263
11264 static bfd_boolean
11265 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11266 struct bfd_link_info *info,
11267 struct elf_link_hash_entry *h,
11268 Elf_Internal_Sym *sym)
11269 {
11270 struct ppc_link_hash_table *htab;
11271 struct plt_entry *ent;
11272 Elf_Internal_Rela rela;
11273 bfd_byte *loc;
11274
11275 htab = ppc_hash_table (info);
11276
11277 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11278 if (ent->plt.offset != (bfd_vma) -1)
11279 {
11280 /* This symbol has an entry in the procedure linkage
11281 table. Set it up. */
11282
11283 if (htab->plt == NULL
11284 || htab->relplt == NULL
11285 || htab->glink == NULL)
11286 abort ();
11287
11288 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11289 fill in the PLT entry. */
11290 rela.r_offset = (htab->plt->output_section->vma
11291 + htab->plt->output_offset
11292 + ent->plt.offset);
11293 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11294 rela.r_addend = ent->addend;
11295
11296 loc = htab->relplt->contents;
11297 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11298 * sizeof (Elf64_External_Rela));
11299 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11300 }
11301
11302 if (h->needs_copy)
11303 {
11304 Elf_Internal_Rela rela;
11305 bfd_byte *loc;
11306
11307 /* This symbol needs a copy reloc. Set it up. */
11308
11309 if (h->dynindx == -1
11310 || (h->root.type != bfd_link_hash_defined
11311 && h->root.type != bfd_link_hash_defweak)
11312 || htab->relbss == NULL)
11313 abort ();
11314
11315 rela.r_offset = (h->root.u.def.value
11316 + h->root.u.def.section->output_section->vma
11317 + h->root.u.def.section->output_offset);
11318 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11319 rela.r_addend = 0;
11320 loc = htab->relbss->contents;
11321 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11322 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11323 }
11324
11325 /* Mark some specially defined symbols as absolute. */
11326 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11327 sym->st_shndx = SHN_ABS;
11328
11329 return TRUE;
11330 }
11331
11332 /* Used to decide how to sort relocs in an optimal manner for the
11333 dynamic linker, before writing them out. */
11334
11335 static enum elf_reloc_type_class
11336 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11337 {
11338 enum elf_ppc64_reloc_type r_type;
11339
11340 r_type = ELF64_R_TYPE (rela->r_info);
11341 switch (r_type)
11342 {
11343 case R_PPC64_RELATIVE:
11344 return reloc_class_relative;
11345 case R_PPC64_JMP_SLOT:
11346 return reloc_class_plt;
11347 case R_PPC64_COPY:
11348 return reloc_class_copy;
11349 default:
11350 return reloc_class_normal;
11351 }
11352 }
11353
11354 /* Finish up the dynamic sections. */
11355
11356 static bfd_boolean
11357 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11358 struct bfd_link_info *info)
11359 {
11360 struct ppc_link_hash_table *htab;
11361 bfd *dynobj;
11362 asection *sdyn;
11363
11364 htab = ppc_hash_table (info);
11365 dynobj = htab->elf.dynobj;
11366 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11367
11368 if (htab->elf.dynamic_sections_created)
11369 {
11370 Elf64_External_Dyn *dyncon, *dynconend;
11371
11372 if (sdyn == NULL || htab->got == NULL)
11373 abort ();
11374
11375 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11376 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11377 for (; dyncon < dynconend; dyncon++)
11378 {
11379 Elf_Internal_Dyn dyn;
11380 asection *s;
11381
11382 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11383
11384 switch (dyn.d_tag)
11385 {
11386 default:
11387 continue;
11388
11389 case DT_PPC64_GLINK:
11390 s = htab->glink;
11391 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11392 /* We stupidly defined DT_PPC64_GLINK to be the start
11393 of glink rather than the first entry point, which is
11394 what ld.so needs, and now have a bigger stub to
11395 support automatic multiple TOCs. */
11396 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11397 break;
11398
11399 case DT_PPC64_OPD:
11400 s = bfd_get_section_by_name (output_bfd, ".opd");
11401 if (s == NULL)
11402 continue;
11403 dyn.d_un.d_ptr = s->vma;
11404 break;
11405
11406 case DT_PPC64_OPDSZ:
11407 s = bfd_get_section_by_name (output_bfd, ".opd");
11408 if (s == NULL)
11409 continue;
11410 dyn.d_un.d_val = s->size;
11411 break;
11412
11413 case DT_PLTGOT:
11414 s = htab->plt;
11415 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11416 break;
11417
11418 case DT_JMPREL:
11419 s = htab->relplt;
11420 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11421 break;
11422
11423 case DT_PLTRELSZ:
11424 dyn.d_un.d_val = htab->relplt->size;
11425 break;
11426
11427 case DT_RELASZ:
11428 /* Don't count procedure linkage table relocs in the
11429 overall reloc count. */
11430 s = htab->relplt;
11431 if (s == NULL)
11432 continue;
11433 dyn.d_un.d_val -= s->size;
11434 break;
11435
11436 case DT_RELA:
11437 /* We may not be using the standard ELF linker script.
11438 If .rela.plt is the first .rela section, we adjust
11439 DT_RELA to not include it. */
11440 s = htab->relplt;
11441 if (s == NULL)
11442 continue;
11443 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11444 continue;
11445 dyn.d_un.d_ptr += s->size;
11446 break;
11447 }
11448
11449 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11450 }
11451 }
11452
11453 if (htab->got != NULL && htab->got->size != 0)
11454 {
11455 /* Fill in the first entry in the global offset table.
11456 We use it to hold the link-time TOCbase. */
11457 bfd_put_64 (output_bfd,
11458 elf_gp (output_bfd) + TOC_BASE_OFF,
11459 htab->got->contents);
11460
11461 /* Set .got entry size. */
11462 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11463 }
11464
11465 if (htab->plt != NULL && htab->plt->size != 0)
11466 {
11467 /* Set .plt entry size. */
11468 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11469 = PLT_ENTRY_SIZE;
11470 }
11471
11472 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11473 brlt ourselves if emitrelocations. */
11474 if (htab->brlt != NULL
11475 && htab->brlt->reloc_count != 0
11476 && !_bfd_elf_link_output_relocs (output_bfd,
11477 htab->brlt,
11478 &elf_section_data (htab->brlt)->rel_hdr,
11479 elf_section_data (htab->brlt)->relocs,
11480 NULL))
11481 return FALSE;
11482
11483 /* We need to handle writing out multiple GOT sections ourselves,
11484 since we didn't add them to DYNOBJ. We know dynobj is the first
11485 bfd. */
11486 while ((dynobj = dynobj->link_next) != NULL)
11487 {
11488 asection *s;
11489
11490 if (!is_ppc64_elf_target (dynobj->xvec))
11491 continue;
11492
11493 s = ppc64_elf_tdata (dynobj)->got;
11494 if (s != NULL
11495 && s->size != 0
11496 && s->output_section != bfd_abs_section_ptr
11497 && !bfd_set_section_contents (output_bfd, s->output_section,
11498 s->contents, s->output_offset,
11499 s->size))
11500 return FALSE;
11501 s = ppc64_elf_tdata (dynobj)->relgot;
11502 if (s != NULL
11503 && s->size != 0
11504 && s->output_section != bfd_abs_section_ptr
11505 && !bfd_set_section_contents (output_bfd, s->output_section,
11506 s->contents, s->output_offset,
11507 s->size))
11508 return FALSE;
11509 }
11510
11511 return TRUE;
11512 }
11513
11514 #include "elf64-target.h"
GDB Binutils - Deliverables
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