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* bfd-in.h (STRING_AND_COMMA): New macro. Takes one constant string as its
[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
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 "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define ELF_COMMONPAGESIZE 0x1000
65 #define elf_info_to_howto ppc64_elf_info_to_howto
66
67 #define elf_backend_want_got_sym 0
68 #define elf_backend_want_plt_sym 0
69 #define elf_backend_plt_alignment 3
70 #define elf_backend_plt_not_loaded 1
71 #define elf_backend_got_header_size 8
72 #define elf_backend_can_gc_sections 1
73 #define elf_backend_can_refcount 1
74 #define elf_backend_rela_normal 1
75
76 #define bfd_elf64_mkobject ppc64_elf_mkobject
77 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
78 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
79 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
80 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
81 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
82 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
83
84 #define elf_backend_object_p ppc64_elf_object_p
85 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
86 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
87 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
88 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
89 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
90 #define elf_backend_check_directives ppc64_elf_check_directives
91 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
92 #define elf_backend_check_relocs ppc64_elf_check_relocs
93 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
94 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
95 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
96 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
97 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
98 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
99 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
100 #define elf_backend_action_discarded ppc64_elf_action_discarded
101 #define elf_backend_relocate_section ppc64_elf_relocate_section
102 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
103 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
104 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
105 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
106 #define elf_backend_special_sections ppc64_elf_special_sections
107
108 /* The name of the dynamic interpreter. This is put in the .interp
109 section. */
110 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
111
112 /* The size in bytes of an entry in the procedure linkage table. */
113 #define PLT_ENTRY_SIZE 24
114
115 /* The initial size of the plt reserved for the dynamic linker. */
116 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
117
118 /* TOC base pointers offset from start of TOC. */
119 #define TOC_BASE_OFF 0x8000
120
121 /* Offset of tp and dtp pointers from start of TLS block. */
122 #define TP_OFFSET 0x7000
123 #define DTP_OFFSET 0x8000
124
125 /* .plt call stub instructions. The normal stub is like this, but
126 sometimes the .plt entry crosses a 64k boundary and we need to
127 insert an addis to adjust r12. */
128 #define PLT_CALL_STUB_SIZE (7*4)
129 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
130 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
131 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
132 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
133 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
134 /* ld %r11,xxx+16@l(%r12) */
135 #define BCTR 0x4e800420 /* bctr */
136
137
138 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
139 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
140 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
141
142 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
143
144 /* glink call stub instructions. We enter with the index in R0. */
145 #define GLINK_CALL_STUB_SIZE (16*4)
146 /* 0: */
147 /* .quad plt0-1f */
148 /* __glink: */
149 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
150 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
151 /* 1: */
152 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
153 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
154 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
155 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
156 /* ld %11,0(%12) */
157 /* ld %2,8(%12) */
158 /* mtctr %11 */
159 /* ld %11,16(%12) */
160 /* bctr */
161
162 /* Pad with this. */
163 #define NOP 0x60000000
164
165 /* Some other nops. */
166 #define CROR_151515 0x4def7b82
167 #define CROR_313131 0x4ffffb82
168
169 /* .glink entries for the first 32k functions are two instructions. */
170 #define LI_R0_0 0x38000000 /* li %r0,0 */
171 #define B_DOT 0x48000000 /* b . */
172
173 /* After that, we need two instructions to load the index, followed by
174 a branch. */
175 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
176 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
177
178 /* Instructions used by the save and restore reg functions. */
179 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
180 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
181 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
182 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
183 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
184 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
185 #define LI_R12_0 0x39800000 /* li %r12,0 */
186 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
187 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
188 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
189 #define BLR 0x4e800020 /* blr */
190
191 /* Since .opd is an array of descriptors and each entry will end up
192 with identical R_PPC64_RELATIVE relocs, there is really no need to
193 propagate .opd relocs; The dynamic linker should be taught to
194 relocate .opd without reloc entries. */
195 #ifndef NO_OPD_RELOCS
196 #define NO_OPD_RELOCS 0
197 #endif
198 \f
199 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
200
201 /* Relocation HOWTO's. */
202 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
203
204 static reloc_howto_type ppc64_elf_howto_raw[] = {
205 /* This reloc does nothing. */
206 HOWTO (R_PPC64_NONE, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_dont, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_PPC64_NONE", /* name */
215 FALSE, /* partial_inplace */
216 0, /* src_mask */
217 0, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* A standard 32 bit relocation. */
221 HOWTO (R_PPC64_ADDR32, /* type */
222 0, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 32, /* bitsize */
225 FALSE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_bitfield, /* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_PPC64_ADDR32", /* name */
230 FALSE, /* partial_inplace */
231 0, /* src_mask */
232 0xffffffff, /* dst_mask */
233 FALSE), /* pcrel_offset */
234
235 /* An absolute 26 bit branch; the lower two bits must be zero.
236 FIXME: we don't check that, we just clear them. */
237 HOWTO (R_PPC64_ADDR24, /* type */
238 0, /* rightshift */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
240 26, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR24", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0x03fffffc, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* A standard 16 bit relocation. */
252 HOWTO (R_PPC64_ADDR16, /* type */
253 0, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_bitfield, /* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC64_ADDR16", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0xffff, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* A 16 bit relocation without overflow. */
267 HOWTO (R_PPC64_ADDR16_LO, /* type */
268 0, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont,/* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC64_ADDR16_LO", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* Bits 16-31 of an address. */
282 HOWTO (R_PPC64_ADDR16_HI, /* type */
283 16, /* rightshift */
284 1, /* size (0 = byte, 1 = short, 2 = long) */
285 16, /* bitsize */
286 FALSE, /* pc_relative */
287 0, /* bitpos */
288 complain_overflow_dont, /* complain_on_overflow */
289 bfd_elf_generic_reloc, /* special_function */
290 "R_PPC64_ADDR16_HI", /* name */
291 FALSE, /* partial_inplace */
292 0, /* src_mask */
293 0xffff, /* dst_mask */
294 FALSE), /* pcrel_offset */
295
296 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
297 bits, treated as a signed number, is negative. */
298 HOWTO (R_PPC64_ADDR16_HA, /* type */
299 16, /* rightshift */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_dont, /* complain_on_overflow */
305 ppc64_elf_ha_reloc, /* special_function */
306 "R_PPC64_ADDR16_HA", /* name */
307 FALSE, /* partial_inplace */
308 0, /* src_mask */
309 0xffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 /* An absolute 16 bit branch; the lower two bits must be zero.
313 FIXME: we don't check that, we just clear them. */
314 HOWTO (R_PPC64_ADDR14, /* type */
315 0, /* rightshift */
316 2, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_bitfield, /* complain_on_overflow */
321 ppc64_elf_branch_reloc, /* special_function */
322 "R_PPC64_ADDR14", /* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0x0000fffc, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* An absolute 16 bit branch, for which bit 10 should be set to
329 indicate that the branch is expected to be taken. The lower two
330 bits must be zero. */
331 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
332 0, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 0, /* bitpos */
337 complain_overflow_bitfield, /* complain_on_overflow */
338 ppc64_elf_brtaken_reloc, /* special_function */
339 "R_PPC64_ADDR14_BRTAKEN",/* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0000fffc, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* An absolute 16 bit branch, for which bit 10 should be set to
346 indicate that the branch is not expected to be taken. The lower
347 two bits must be zero. */
348 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 16, /* bitsize */
352 FALSE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_bitfield, /* complain_on_overflow */
355 ppc64_elf_brtaken_reloc, /* special_function */
356 "R_PPC64_ADDR14_BRNTAKEN",/* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0x0000fffc, /* dst_mask */
360 FALSE), /* pcrel_offset */
361
362 /* A relative 26 bit branch; the lower two bits must be zero. */
363 HOWTO (R_PPC64_REL24, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 26, /* bitsize */
367 TRUE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_signed, /* complain_on_overflow */
370 ppc64_elf_branch_reloc, /* special_function */
371 "R_PPC64_REL24", /* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0x03fffffc, /* dst_mask */
375 TRUE), /* pcrel_offset */
376
377 /* A relative 16 bit branch; the lower two bits must be zero. */
378 HOWTO (R_PPC64_REL14, /* type */
379 0, /* rightshift */
380 2, /* size (0 = byte, 1 = short, 2 = long) */
381 16, /* bitsize */
382 TRUE, /* pc_relative */
383 0, /* bitpos */
384 complain_overflow_signed, /* complain_on_overflow */
385 ppc64_elf_branch_reloc, /* special_function */
386 "R_PPC64_REL14", /* name */
387 FALSE, /* partial_inplace */
388 0, /* src_mask */
389 0x0000fffc, /* dst_mask */
390 TRUE), /* pcrel_offset */
391
392 /* A relative 16 bit branch. Bit 10 should be set to indicate that
393 the branch is expected to be taken. The lower two bits must be
394 zero. */
395 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
396 0, /* rightshift */
397 2, /* size (0 = byte, 1 = short, 2 = long) */
398 16, /* bitsize */
399 TRUE, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_signed, /* complain_on_overflow */
402 ppc64_elf_brtaken_reloc, /* special_function */
403 "R_PPC64_REL14_BRTAKEN", /* name */
404 FALSE, /* partial_inplace */
405 0, /* src_mask */
406 0x0000fffc, /* dst_mask */
407 TRUE), /* pcrel_offset */
408
409 /* A relative 16 bit branch. Bit 10 should be set to indicate that
410 the branch is not expected to be taken. The lower two bits must
411 be zero. */
412 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
413 0, /* rightshift */
414 2, /* size (0 = byte, 1 = short, 2 = long) */
415 16, /* bitsize */
416 TRUE, /* pc_relative */
417 0, /* bitpos */
418 complain_overflow_signed, /* complain_on_overflow */
419 ppc64_elf_brtaken_reloc, /* special_function */
420 "R_PPC64_REL14_BRNTAKEN",/* name */
421 FALSE, /* partial_inplace */
422 0, /* src_mask */
423 0x0000fffc, /* dst_mask */
424 TRUE), /* pcrel_offset */
425
426 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
427 symbol. */
428 HOWTO (R_PPC64_GOT16, /* type */
429 0, /* rightshift */
430 1, /* size (0 = byte, 1 = short, 2 = long) */
431 16, /* bitsize */
432 FALSE, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_signed, /* complain_on_overflow */
435 ppc64_elf_unhandled_reloc, /* special_function */
436 "R_PPC64_GOT16", /* name */
437 FALSE, /* partial_inplace */
438 0, /* src_mask */
439 0xffff, /* dst_mask */
440 FALSE), /* pcrel_offset */
441
442 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
443 the symbol. */
444 HOWTO (R_PPC64_GOT16_LO, /* type */
445 0, /* rightshift */
446 1, /* size (0 = byte, 1 = short, 2 = long) */
447 16, /* bitsize */
448 FALSE, /* pc_relative */
449 0, /* bitpos */
450 complain_overflow_dont, /* complain_on_overflow */
451 ppc64_elf_unhandled_reloc, /* special_function */
452 "R_PPC64_GOT16_LO", /* name */
453 FALSE, /* partial_inplace */
454 0, /* src_mask */
455 0xffff, /* dst_mask */
456 FALSE), /* pcrel_offset */
457
458 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
459 the symbol. */
460 HOWTO (R_PPC64_GOT16_HI, /* type */
461 16, /* rightshift */
462 1, /* size (0 = byte, 1 = short, 2 = long) */
463 16, /* bitsize */
464 FALSE, /* pc_relative */
465 0, /* bitpos */
466 complain_overflow_dont,/* complain_on_overflow */
467 ppc64_elf_unhandled_reloc, /* special_function */
468 "R_PPC64_GOT16_HI", /* name */
469 FALSE, /* partial_inplace */
470 0, /* src_mask */
471 0xffff, /* dst_mask */
472 FALSE), /* pcrel_offset */
473
474 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
475 the symbol. */
476 HOWTO (R_PPC64_GOT16_HA, /* type */
477 16, /* rightshift */
478 1, /* size (0 = byte, 1 = short, 2 = long) */
479 16, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_dont,/* complain_on_overflow */
483 ppc64_elf_unhandled_reloc, /* special_function */
484 "R_PPC64_GOT16_HA", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0xffff, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* This is used only by the dynamic linker. The symbol should exist
491 both in the object being run and in some shared library. The
492 dynamic linker copies the data addressed by the symbol from the
493 shared library into the object, because the object being
494 run has to have the data at some particular address. */
495 HOWTO (R_PPC64_COPY, /* type */
496 0, /* rightshift */
497 0, /* this one is variable size */
498 0, /* bitsize */
499 FALSE, /* pc_relative */
500 0, /* bitpos */
501 complain_overflow_dont, /* complain_on_overflow */
502 ppc64_elf_unhandled_reloc, /* special_function */
503 "R_PPC64_COPY", /* name */
504 FALSE, /* partial_inplace */
505 0, /* src_mask */
506 0, /* dst_mask */
507 FALSE), /* pcrel_offset */
508
509 /* Like R_PPC64_ADDR64, but used when setting global offset table
510 entries. */
511 HOWTO (R_PPC64_GLOB_DAT, /* type */
512 0, /* rightshift */
513 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
514 64, /* bitsize */
515 FALSE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont, /* complain_on_overflow */
518 ppc64_elf_unhandled_reloc, /* special_function */
519 "R_PPC64_GLOB_DAT", /* name */
520 FALSE, /* partial_inplace */
521 0, /* src_mask */
522 ONES (64), /* dst_mask */
523 FALSE), /* pcrel_offset */
524
525 /* Created by the link editor. Marks a procedure linkage table
526 entry for a symbol. */
527 HOWTO (R_PPC64_JMP_SLOT, /* type */
528 0, /* rightshift */
529 0, /* size (0 = byte, 1 = short, 2 = long) */
530 0, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont, /* complain_on_overflow */
534 ppc64_elf_unhandled_reloc, /* special_function */
535 "R_PPC64_JMP_SLOT", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 0, /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Used only by the dynamic linker. When the object is run, this
542 doubleword64 is set to the load address of the object, plus the
543 addend. */
544 HOWTO (R_PPC64_RELATIVE, /* type */
545 0, /* rightshift */
546 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
547 64, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_dont, /* complain_on_overflow */
551 bfd_elf_generic_reloc, /* special_function */
552 "R_PPC64_RELATIVE", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 ONES (64), /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* Like R_PPC64_ADDR32, but may be unaligned. */
559 HOWTO (R_PPC64_UADDR32, /* type */
560 0, /* rightshift */
561 2, /* size (0 = byte, 1 = short, 2 = long) */
562 32, /* bitsize */
563 FALSE, /* pc_relative */
564 0, /* bitpos */
565 complain_overflow_bitfield, /* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_PPC64_UADDR32", /* name */
568 FALSE, /* partial_inplace */
569 0, /* src_mask */
570 0xffffffff, /* dst_mask */
571 FALSE), /* pcrel_offset */
572
573 /* Like R_PPC64_ADDR16, but may be unaligned. */
574 HOWTO (R_PPC64_UADDR16, /* type */
575 0, /* rightshift */
576 1, /* size (0 = byte, 1 = short, 2 = long) */
577 16, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_bitfield, /* complain_on_overflow */
581 bfd_elf_generic_reloc, /* special_function */
582 "R_PPC64_UADDR16", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 0xffff, /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* 32-bit PC relative. */
589 HOWTO (R_PPC64_REL32, /* type */
590 0, /* rightshift */
591 2, /* size (0 = byte, 1 = short, 2 = long) */
592 32, /* bitsize */
593 TRUE, /* pc_relative */
594 0, /* bitpos */
595 /* FIXME: Verify. Was complain_overflow_bitfield. */
596 complain_overflow_signed, /* complain_on_overflow */
597 bfd_elf_generic_reloc, /* special_function */
598 "R_PPC64_REL32", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffffffff, /* dst_mask */
602 TRUE), /* pcrel_offset */
603
604 /* 32-bit relocation to the symbol's procedure linkage table. */
605 HOWTO (R_PPC64_PLT32, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 32, /* bitsize */
609 FALSE, /* pc_relative */
610 0, /* bitpos */
611 complain_overflow_bitfield, /* complain_on_overflow */
612 ppc64_elf_unhandled_reloc, /* special_function */
613 "R_PPC64_PLT32", /* name */
614 FALSE, /* partial_inplace */
615 0, /* src_mask */
616 0xffffffff, /* dst_mask */
617 FALSE), /* pcrel_offset */
618
619 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
620 FIXME: R_PPC64_PLTREL32 not supported. */
621 HOWTO (R_PPC64_PLTREL32, /* type */
622 0, /* rightshift */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
624 32, /* bitsize */
625 TRUE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_signed, /* complain_on_overflow */
628 bfd_elf_generic_reloc, /* special_function */
629 "R_PPC64_PLTREL32", /* name */
630 FALSE, /* partial_inplace */
631 0, /* src_mask */
632 0xffffffff, /* dst_mask */
633 TRUE), /* pcrel_offset */
634
635 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
636 the symbol. */
637 HOWTO (R_PPC64_PLT16_LO, /* type */
638 0, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_dont, /* complain_on_overflow */
644 ppc64_elf_unhandled_reloc, /* special_function */
645 "R_PPC64_PLT16_LO", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
652 the symbol. */
653 HOWTO (R_PPC64_PLT16_HI, /* type */
654 16, /* rightshift */
655 1, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 ppc64_elf_unhandled_reloc, /* special_function */
661 "R_PPC64_PLT16_HI", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0xffff, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
668 the symbol. */
669 HOWTO (R_PPC64_PLT16_HA, /* type */
670 16, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_dont, /* complain_on_overflow */
676 ppc64_elf_unhandled_reloc, /* special_function */
677 "R_PPC64_PLT16_HA", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* 16-bit section relative relocation. */
684 HOWTO (R_PPC64_SECTOFF, /* type */
685 0, /* rightshift */
686 1, /* size (0 = byte, 1 = short, 2 = long) */
687 16, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_bitfield, /* complain_on_overflow */
691 ppc64_elf_sectoff_reloc, /* special_function */
692 "R_PPC64_SECTOFF", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0xffff, /* dst_mask */
696 FALSE), /* pcrel_offset */
697
698 /* Like R_PPC64_SECTOFF, but no overflow warning. */
699 HOWTO (R_PPC64_SECTOFF_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_sectoff_reloc, /* special_function */
707 "R_PPC64_SECTOFF_LO", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit upper half section relative relocation. */
714 HOWTO (R_PPC64_SECTOFF_HI, /* type */
715 16, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_dont, /* complain_on_overflow */
721 ppc64_elf_sectoff_reloc, /* special_function */
722 "R_PPC64_SECTOFF_HI", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit upper half adjusted section relative relocation. */
729 HOWTO (R_PPC64_SECTOFF_HA, /* type */
730 16, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc64_elf_sectoff_ha_reloc, /* special_function */
737 "R_PPC64_SECTOFF_HA", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* Like R_PPC64_REL24 without touching the two least significant bits. */
744 HOWTO (R_PPC64_REL30, /* type */
745 2, /* rightshift */
746 2, /* size (0 = byte, 1 = short, 2 = long) */
747 30, /* bitsize */
748 TRUE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC64_REL30", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xfffffffc, /* dst_mask */
756 TRUE), /* pcrel_offset */
757
758 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
759
760 /* A standard 64-bit relocation. */
761 HOWTO (R_PPC64_ADDR64, /* type */
762 0, /* rightshift */
763 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
764 64, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 bfd_elf_generic_reloc, /* special_function */
769 "R_PPC64_ADDR64", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 ONES (64), /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* The bits 32-47 of an address. */
776 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
777 32, /* rightshift */
778 1, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_dont, /* complain_on_overflow */
783 bfd_elf_generic_reloc, /* special_function */
784 "R_PPC64_ADDR16_HIGHER", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0xffff, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* The bits 32-47 of an address, plus 1 if the contents of the low
791 16 bits, treated as a signed number, is negative. */
792 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
793 32, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 FALSE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 ppc64_elf_ha_reloc, /* special_function */
800 "R_PPC64_ADDR16_HIGHERA", /* name */
801 FALSE, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 FALSE), /* pcrel_offset */
805
806 /* The bits 48-63 of an address. */
807 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
808 48, /* rightshift */
809 1, /* size (0 = byte, 1 = short, 2 = long) */
810 16, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_PPC64_ADDR16_HIGHEST", /* name */
816 FALSE, /* partial_inplace */
817 0, /* src_mask */
818 0xffff, /* dst_mask */
819 FALSE), /* pcrel_offset */
820
821 /* The bits 48-63 of an address, plus 1 if the contents of the low
822 16 bits, treated as a signed number, is negative. */
823 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
824 48, /* rightshift */
825 1, /* size (0 = byte, 1 = short, 2 = long) */
826 16, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 ppc64_elf_ha_reloc, /* special_function */
831 "R_PPC64_ADDR16_HIGHESTA", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 0xffff, /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* Like ADDR64, but may be unaligned. */
838 HOWTO (R_PPC64_UADDR64, /* type */
839 0, /* rightshift */
840 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
841 64, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_UADDR64", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 ONES (64), /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* 64-bit relative relocation. */
853 HOWTO (R_PPC64_REL64, /* type */
854 0, /* rightshift */
855 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
856 64, /* bitsize */
857 TRUE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 "R_PPC64_REL64", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 ONES (64), /* dst_mask */
865 TRUE), /* pcrel_offset */
866
867 /* 64-bit relocation to the symbol's procedure linkage table. */
868 HOWTO (R_PPC64_PLT64, /* type */
869 0, /* rightshift */
870 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
871 64, /* bitsize */
872 FALSE, /* pc_relative */
873 0, /* bitpos */
874 complain_overflow_dont, /* complain_on_overflow */
875 ppc64_elf_unhandled_reloc, /* special_function */
876 "R_PPC64_PLT64", /* name */
877 FALSE, /* partial_inplace */
878 0, /* src_mask */
879 ONES (64), /* dst_mask */
880 FALSE), /* pcrel_offset */
881
882 /* 64-bit PC relative relocation to the symbol's procedure linkage
883 table. */
884 /* FIXME: R_PPC64_PLTREL64 not supported. */
885 HOWTO (R_PPC64_PLTREL64, /* type */
886 0, /* rightshift */
887 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
888 64, /* bitsize */
889 TRUE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc64_elf_unhandled_reloc, /* special_function */
893 "R_PPC64_PLTREL64", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 ONES (64), /* dst_mask */
897 TRUE), /* pcrel_offset */
898
899 /* 16 bit TOC-relative relocation. */
900
901 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
902 HOWTO (R_PPC64_TOC16, /* type */
903 0, /* rightshift */
904 1, /* size (0 = byte, 1 = short, 2 = long) */
905 16, /* bitsize */
906 FALSE, /* pc_relative */
907 0, /* bitpos */
908 complain_overflow_signed, /* complain_on_overflow */
909 ppc64_elf_toc_reloc, /* special_function */
910 "R_PPC64_TOC16", /* name */
911 FALSE, /* partial_inplace */
912 0, /* src_mask */
913 0xffff, /* dst_mask */
914 FALSE), /* pcrel_offset */
915
916 /* 16 bit TOC-relative relocation without overflow. */
917
918 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
919 HOWTO (R_PPC64_TOC16_LO, /* type */
920 0, /* rightshift */
921 1, /* size (0 = byte, 1 = short, 2 = long) */
922 16, /* bitsize */
923 FALSE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_dont, /* complain_on_overflow */
926 ppc64_elf_toc_reloc, /* special_function */
927 "R_PPC64_TOC16_LO", /* name */
928 FALSE, /* partial_inplace */
929 0, /* src_mask */
930 0xffff, /* dst_mask */
931 FALSE), /* pcrel_offset */
932
933 /* 16 bit TOC-relative relocation, high 16 bits. */
934
935 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
936 HOWTO (R_PPC64_TOC16_HI, /* type */
937 16, /* rightshift */
938 1, /* size (0 = byte, 1 = short, 2 = long) */
939 16, /* bitsize */
940 FALSE, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_dont, /* complain_on_overflow */
943 ppc64_elf_toc_reloc, /* special_function */
944 "R_PPC64_TOC16_HI", /* name */
945 FALSE, /* partial_inplace */
946 0, /* src_mask */
947 0xffff, /* dst_mask */
948 FALSE), /* pcrel_offset */
949
950 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
951 contents of the low 16 bits, treated as a signed number, is
952 negative. */
953
954 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
955 HOWTO (R_PPC64_TOC16_HA, /* type */
956 16, /* rightshift */
957 1, /* size (0 = byte, 1 = short, 2 = long) */
958 16, /* bitsize */
959 FALSE, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc64_elf_toc_ha_reloc, /* special_function */
963 "R_PPC64_TOC16_HA", /* name */
964 FALSE, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 FALSE), /* pcrel_offset */
968
969 /* 64-bit relocation; insert value of TOC base (.TOC.). */
970
971 /* R_PPC64_TOC 51 doubleword64 .TOC. */
972 HOWTO (R_PPC64_TOC, /* type */
973 0, /* rightshift */
974 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
975 64, /* bitsize */
976 FALSE, /* pc_relative */
977 0, /* bitpos */
978 complain_overflow_bitfield, /* complain_on_overflow */
979 ppc64_elf_toc64_reloc, /* special_function */
980 "R_PPC64_TOC", /* name */
981 FALSE, /* partial_inplace */
982 0, /* src_mask */
983 ONES (64), /* dst_mask */
984 FALSE), /* pcrel_offset */
985
986 /* Like R_PPC64_GOT16, but also informs the link editor that the
987 value to relocate may (!) refer to a PLT entry which the link
988 editor (a) may replace with the symbol value. If the link editor
989 is unable to fully resolve the symbol, it may (b) create a PLT
990 entry and store the address to the new PLT entry in the GOT.
991 This permits lazy resolution of function symbols at run time.
992 The link editor may also skip all of this and just (c) emit a
993 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
994 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
995 HOWTO (R_PPC64_PLTGOT16, /* type */
996 0, /* rightshift */
997 1, /* size (0 = byte, 1 = short, 2 = long) */
998 16, /* bitsize */
999 FALSE, /* pc_relative */
1000 0, /* bitpos */
1001 complain_overflow_signed, /* complain_on_overflow */
1002 ppc64_elf_unhandled_reloc, /* special_function */
1003 "R_PPC64_PLTGOT16", /* name */
1004 FALSE, /* partial_inplace */
1005 0, /* src_mask */
1006 0xffff, /* dst_mask */
1007 FALSE), /* pcrel_offset */
1008
1009 /* Like R_PPC64_PLTGOT16, but without overflow. */
1010 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1011 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1012 0, /* rightshift */
1013 1, /* size (0 = byte, 1 = short, 2 = long) */
1014 16, /* bitsize */
1015 FALSE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_dont, /* complain_on_overflow */
1018 ppc64_elf_unhandled_reloc, /* special_function */
1019 "R_PPC64_PLTGOT16_LO", /* name */
1020 FALSE, /* partial_inplace */
1021 0, /* src_mask */
1022 0xffff, /* dst_mask */
1023 FALSE), /* pcrel_offset */
1024
1025 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1026 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1027 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc64_elf_unhandled_reloc, /* special_function */
1035 "R_PPC64_PLTGOT16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1042 1 if the contents of the low 16 bits, treated as a signed number,
1043 is negative. */
1044 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1045 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1046 16, /* rightshift */
1047 1, /* size (0 = byte, 1 = short, 2 = long) */
1048 16, /* bitsize */
1049 FALSE, /* pc_relative */
1050 0, /* bitpos */
1051 complain_overflow_dont,/* complain_on_overflow */
1052 ppc64_elf_unhandled_reloc, /* special_function */
1053 "R_PPC64_PLTGOT16_HA", /* name */
1054 FALSE, /* partial_inplace */
1055 0, /* src_mask */
1056 0xffff, /* dst_mask */
1057 FALSE), /* pcrel_offset */
1058
1059 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1060 HOWTO (R_PPC64_ADDR16_DS, /* type */
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_bitfield, /* complain_on_overflow */
1067 bfd_elf_generic_reloc, /* special_function */
1068 "R_PPC64_ADDR16_DS", /* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xfffc, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1075 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_dont,/* complain_on_overflow */
1082 bfd_elf_generic_reloc, /* special_function */
1083 "R_PPC64_ADDR16_LO_DS",/* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xfffc, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1090 HOWTO (R_PPC64_GOT16_DS, /* type */
1091 0, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_signed, /* complain_on_overflow */
1097 ppc64_elf_unhandled_reloc, /* special_function */
1098 "R_PPC64_GOT16_DS", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xfffc, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1105 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1106 0, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc64_elf_unhandled_reloc, /* special_function */
1113 "R_PPC64_GOT16_LO_DS", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xfffc, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1120 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_dont, /* complain_on_overflow */
1127 ppc64_elf_unhandled_reloc, /* special_function */
1128 "R_PPC64_PLT16_LO_DS", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xfffc, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1135 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_bitfield, /* complain_on_overflow */
1142 ppc64_elf_sectoff_reloc, /* special_function */
1143 "R_PPC64_SECTOFF_DS", /* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xfffc, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1150 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1151 0, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_dont, /* complain_on_overflow */
1157 ppc64_elf_sectoff_reloc, /* special_function */
1158 "R_PPC64_SECTOFF_LO_DS",/* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xfffc, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1165 HOWTO (R_PPC64_TOC16_DS, /* type */
1166 0, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_signed, /* complain_on_overflow */
1172 ppc64_elf_toc_reloc, /* special_function */
1173 "R_PPC64_TOC16_DS", /* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xfffc, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1180 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1181 0, /* rightshift */
1182 1, /* size (0 = byte, 1 = short, 2 = long) */
1183 16, /* bitsize */
1184 FALSE, /* pc_relative */
1185 0, /* bitpos */
1186 complain_overflow_dont, /* complain_on_overflow */
1187 ppc64_elf_toc_reloc, /* special_function */
1188 "R_PPC64_TOC16_LO_DS", /* name */
1189 FALSE, /* partial_inplace */
1190 0, /* src_mask */
1191 0xfffc, /* dst_mask */
1192 FALSE), /* pcrel_offset */
1193
1194 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1195 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1196 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1197 0, /* rightshift */
1198 1, /* size (0 = byte, 1 = short, 2 = long) */
1199 16, /* bitsize */
1200 FALSE, /* pc_relative */
1201 0, /* bitpos */
1202 complain_overflow_signed, /* complain_on_overflow */
1203 ppc64_elf_unhandled_reloc, /* special_function */
1204 "R_PPC64_PLTGOT16_DS", /* name */
1205 FALSE, /* partial_inplace */
1206 0, /* src_mask */
1207 0xfffc, /* dst_mask */
1208 FALSE), /* pcrel_offset */
1209
1210 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1211 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1212 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc64_elf_unhandled_reloc, /* special_function */
1220 "R_PPC64_PLTGOT16_LO_DS",/* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Marker reloc for TLS. */
1227 HOWTO (R_PPC64_TLS,
1228 0, /* rightshift */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1230 32, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC64_TLS", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Computes the load module index of the load module that contains the
1242 definition of its TLS sym. */
1243 HOWTO (R_PPC64_DTPMOD64,
1244 0, /* rightshift */
1245 4, /* size (0 = byte, 1 = short, 2 = long) */
1246 64, /* bitsize */
1247 FALSE, /* pc_relative */
1248 0, /* bitpos */
1249 complain_overflow_dont, /* complain_on_overflow */
1250 ppc64_elf_unhandled_reloc, /* special_function */
1251 "R_PPC64_DTPMOD64", /* name */
1252 FALSE, /* partial_inplace */
1253 0, /* src_mask */
1254 ONES (64), /* dst_mask */
1255 FALSE), /* pcrel_offset */
1256
1257 /* Computes a dtv-relative displacement, the difference between the value
1258 of sym+add and the base address of the thread-local storage block that
1259 contains the definition of sym, minus 0x8000. */
1260 HOWTO (R_PPC64_DTPREL64,
1261 0, /* rightshift */
1262 4, /* size (0 = byte, 1 = short, 2 = long) */
1263 64, /* bitsize */
1264 FALSE, /* pc_relative */
1265 0, /* bitpos */
1266 complain_overflow_dont, /* complain_on_overflow */
1267 ppc64_elf_unhandled_reloc, /* special_function */
1268 "R_PPC64_DTPREL64", /* name */
1269 FALSE, /* partial_inplace */
1270 0, /* src_mask */
1271 ONES (64), /* dst_mask */
1272 FALSE), /* pcrel_offset */
1273
1274 /* A 16 bit dtprel reloc. */
1275 HOWTO (R_PPC64_DTPREL16,
1276 0, /* rightshift */
1277 1, /* size (0 = byte, 1 = short, 2 = long) */
1278 16, /* bitsize */
1279 FALSE, /* pc_relative */
1280 0, /* bitpos */
1281 complain_overflow_signed, /* complain_on_overflow */
1282 ppc64_elf_unhandled_reloc, /* special_function */
1283 "R_PPC64_DTPREL16", /* name */
1284 FALSE, /* partial_inplace */
1285 0, /* src_mask */
1286 0xffff, /* dst_mask */
1287 FALSE), /* pcrel_offset */
1288
1289 /* Like DTPREL16, but no overflow. */
1290 HOWTO (R_PPC64_DTPREL16_LO,
1291 0, /* rightshift */
1292 1, /* size (0 = byte, 1 = short, 2 = long) */
1293 16, /* bitsize */
1294 FALSE, /* pc_relative */
1295 0, /* bitpos */
1296 complain_overflow_dont, /* complain_on_overflow */
1297 ppc64_elf_unhandled_reloc, /* special_function */
1298 "R_PPC64_DTPREL16_LO", /* name */
1299 FALSE, /* partial_inplace */
1300 0, /* src_mask */
1301 0xffff, /* dst_mask */
1302 FALSE), /* pcrel_offset */
1303
1304 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1305 HOWTO (R_PPC64_DTPREL16_HI,
1306 16, /* rightshift */
1307 1, /* size (0 = byte, 1 = short, 2 = long) */
1308 16, /* bitsize */
1309 FALSE, /* pc_relative */
1310 0, /* bitpos */
1311 complain_overflow_dont, /* complain_on_overflow */
1312 ppc64_elf_unhandled_reloc, /* special_function */
1313 "R_PPC64_DTPREL16_HI", /* name */
1314 FALSE, /* partial_inplace */
1315 0, /* src_mask */
1316 0xffff, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1318
1319 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1320 HOWTO (R_PPC64_DTPREL16_HA,
1321 16, /* rightshift */
1322 1, /* size (0 = byte, 1 = short, 2 = long) */
1323 16, /* bitsize */
1324 FALSE, /* pc_relative */
1325 0, /* bitpos */
1326 complain_overflow_dont, /* complain_on_overflow */
1327 ppc64_elf_unhandled_reloc, /* special_function */
1328 "R_PPC64_DTPREL16_HA", /* name */
1329 FALSE, /* partial_inplace */
1330 0, /* src_mask */
1331 0xffff, /* dst_mask */
1332 FALSE), /* pcrel_offset */
1333
1334 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1335 HOWTO (R_PPC64_DTPREL16_HIGHER,
1336 32, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 FALSE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_dont, /* complain_on_overflow */
1342 ppc64_elf_unhandled_reloc, /* special_function */
1343 "R_PPC64_DTPREL16_HIGHER", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1350 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1351 32, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_dont, /* complain_on_overflow */
1357 ppc64_elf_unhandled_reloc, /* special_function */
1358 "R_PPC64_DTPREL16_HIGHERA", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1365 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1366 48, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont, /* complain_on_overflow */
1372 ppc64_elf_unhandled_reloc, /* special_function */
1373 "R_PPC64_DTPREL16_HIGHEST", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1380 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1381 48, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 FALSE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 ppc64_elf_unhandled_reloc, /* special_function */
1388 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 FALSE), /* pcrel_offset */
1393
1394 /* Like DTPREL16, but for insns with a DS field. */
1395 HOWTO (R_PPC64_DTPREL16_DS,
1396 0, /* rightshift */
1397 1, /* size (0 = byte, 1 = short, 2 = long) */
1398 16, /* bitsize */
1399 FALSE, /* pc_relative */
1400 0, /* bitpos */
1401 complain_overflow_signed, /* complain_on_overflow */
1402 ppc64_elf_unhandled_reloc, /* special_function */
1403 "R_PPC64_DTPREL16_DS", /* name */
1404 FALSE, /* partial_inplace */
1405 0, /* src_mask */
1406 0xfffc, /* dst_mask */
1407 FALSE), /* pcrel_offset */
1408
1409 /* Like DTPREL16_DS, but no overflow. */
1410 HOWTO (R_PPC64_DTPREL16_LO_DS,
1411 0, /* rightshift */
1412 1, /* size (0 = byte, 1 = short, 2 = long) */
1413 16, /* bitsize */
1414 FALSE, /* pc_relative */
1415 0, /* bitpos */
1416 complain_overflow_dont, /* complain_on_overflow */
1417 ppc64_elf_unhandled_reloc, /* special_function */
1418 "R_PPC64_DTPREL16_LO_DS", /* name */
1419 FALSE, /* partial_inplace */
1420 0, /* src_mask */
1421 0xfffc, /* dst_mask */
1422 FALSE), /* pcrel_offset */
1423
1424 /* Computes a tp-relative displacement, the difference between the value of
1425 sym+add and the value of the thread pointer (r13). */
1426 HOWTO (R_PPC64_TPREL64,
1427 0, /* rightshift */
1428 4, /* size (0 = byte, 1 = short, 2 = long) */
1429 64, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 ppc64_elf_unhandled_reloc, /* special_function */
1434 "R_PPC64_TPREL64", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 ONES (64), /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* A 16 bit tprel reloc. */
1441 HOWTO (R_PPC64_TPREL16,
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 ppc64_elf_unhandled_reloc, /* special_function */
1449 "R_PPC64_TPREL16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454
1455 /* Like TPREL16, but no overflow. */
1456 HOWTO (R_PPC64_TPREL16_LO,
1457 0, /* rightshift */
1458 1, /* size (0 = byte, 1 = short, 2 = long) */
1459 16, /* bitsize */
1460 FALSE, /* pc_relative */
1461 0, /* bitpos */
1462 complain_overflow_dont, /* complain_on_overflow */
1463 ppc64_elf_unhandled_reloc, /* special_function */
1464 "R_PPC64_TPREL16_LO", /* name */
1465 FALSE, /* partial_inplace */
1466 0, /* src_mask */
1467 0xffff, /* dst_mask */
1468 FALSE), /* pcrel_offset */
1469
1470 /* Like TPREL16_LO, but next higher group of 16 bits. */
1471 HOWTO (R_PPC64_TPREL16_HI,
1472 16, /* rightshift */
1473 1, /* size (0 = byte, 1 = short, 2 = long) */
1474 16, /* bitsize */
1475 FALSE, /* pc_relative */
1476 0, /* bitpos */
1477 complain_overflow_dont, /* complain_on_overflow */
1478 ppc64_elf_unhandled_reloc, /* special_function */
1479 "R_PPC64_TPREL16_HI", /* name */
1480 FALSE, /* partial_inplace */
1481 0, /* src_mask */
1482 0xffff, /* dst_mask */
1483 FALSE), /* pcrel_offset */
1484
1485 /* Like TPREL16_HI, but adjust for low 16 bits. */
1486 HOWTO (R_PPC64_TPREL16_HA,
1487 16, /* rightshift */
1488 1, /* size (0 = byte, 1 = short, 2 = long) */
1489 16, /* bitsize */
1490 FALSE, /* pc_relative */
1491 0, /* bitpos */
1492 complain_overflow_dont, /* complain_on_overflow */
1493 ppc64_elf_unhandled_reloc, /* special_function */
1494 "R_PPC64_TPREL16_HA", /* name */
1495 FALSE, /* partial_inplace */
1496 0, /* src_mask */
1497 0xffff, /* dst_mask */
1498 FALSE), /* pcrel_offset */
1499
1500 /* Like TPREL16_HI, but next higher group of 16 bits. */
1501 HOWTO (R_PPC64_TPREL16_HIGHER,
1502 32, /* rightshift */
1503 1, /* size (0 = byte, 1 = short, 2 = long) */
1504 16, /* bitsize */
1505 FALSE, /* pc_relative */
1506 0, /* bitpos */
1507 complain_overflow_dont, /* complain_on_overflow */
1508 ppc64_elf_unhandled_reloc, /* special_function */
1509 "R_PPC64_TPREL16_HIGHER", /* name */
1510 FALSE, /* partial_inplace */
1511 0, /* src_mask */
1512 0xffff, /* dst_mask */
1513 FALSE), /* pcrel_offset */
1514
1515 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1516 HOWTO (R_PPC64_TPREL16_HIGHERA,
1517 32, /* rightshift */
1518 1, /* size (0 = byte, 1 = short, 2 = long) */
1519 16, /* bitsize */
1520 FALSE, /* pc_relative */
1521 0, /* bitpos */
1522 complain_overflow_dont, /* complain_on_overflow */
1523 ppc64_elf_unhandled_reloc, /* special_function */
1524 "R_PPC64_TPREL16_HIGHERA", /* name */
1525 FALSE, /* partial_inplace */
1526 0, /* src_mask */
1527 0xffff, /* dst_mask */
1528 FALSE), /* pcrel_offset */
1529
1530 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1531 HOWTO (R_PPC64_TPREL16_HIGHEST,
1532 48, /* rightshift */
1533 1, /* size (0 = byte, 1 = short, 2 = long) */
1534 16, /* bitsize */
1535 FALSE, /* pc_relative */
1536 0, /* bitpos */
1537 complain_overflow_dont, /* complain_on_overflow */
1538 ppc64_elf_unhandled_reloc, /* special_function */
1539 "R_PPC64_TPREL16_HIGHEST", /* name */
1540 FALSE, /* partial_inplace */
1541 0, /* src_mask */
1542 0xffff, /* dst_mask */
1543 FALSE), /* pcrel_offset */
1544
1545 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1546 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1547 48, /* rightshift */
1548 1, /* size (0 = byte, 1 = short, 2 = long) */
1549 16, /* bitsize */
1550 FALSE, /* pc_relative */
1551 0, /* bitpos */
1552 complain_overflow_dont, /* complain_on_overflow */
1553 ppc64_elf_unhandled_reloc, /* special_function */
1554 "R_PPC64_TPREL16_HIGHESTA", /* name */
1555 FALSE, /* partial_inplace */
1556 0, /* src_mask */
1557 0xffff, /* dst_mask */
1558 FALSE), /* pcrel_offset */
1559
1560 /* Like TPREL16, but for insns with a DS field. */
1561 HOWTO (R_PPC64_TPREL16_DS,
1562 0, /* rightshift */
1563 1, /* size (0 = byte, 1 = short, 2 = long) */
1564 16, /* bitsize */
1565 FALSE, /* pc_relative */
1566 0, /* bitpos */
1567 complain_overflow_signed, /* complain_on_overflow */
1568 ppc64_elf_unhandled_reloc, /* special_function */
1569 "R_PPC64_TPREL16_DS", /* name */
1570 FALSE, /* partial_inplace */
1571 0, /* src_mask */
1572 0xfffc, /* dst_mask */
1573 FALSE), /* pcrel_offset */
1574
1575 /* Like TPREL16_DS, but no overflow. */
1576 HOWTO (R_PPC64_TPREL16_LO_DS,
1577 0, /* rightshift */
1578 1, /* size (0 = byte, 1 = short, 2 = long) */
1579 16, /* bitsize */
1580 FALSE, /* pc_relative */
1581 0, /* bitpos */
1582 complain_overflow_dont, /* complain_on_overflow */
1583 ppc64_elf_unhandled_reloc, /* special_function */
1584 "R_PPC64_TPREL16_LO_DS", /* name */
1585 FALSE, /* partial_inplace */
1586 0, /* src_mask */
1587 0xfffc, /* dst_mask */
1588 FALSE), /* pcrel_offset */
1589
1590 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1591 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1592 to the first entry relative to the TOC base (r2). */
1593 HOWTO (R_PPC64_GOT_TLSGD16,
1594 0, /* rightshift */
1595 1, /* size (0 = byte, 1 = short, 2 = long) */
1596 16, /* bitsize */
1597 FALSE, /* pc_relative */
1598 0, /* bitpos */
1599 complain_overflow_signed, /* complain_on_overflow */
1600 ppc64_elf_unhandled_reloc, /* special_function */
1601 "R_PPC64_GOT_TLSGD16", /* name */
1602 FALSE, /* partial_inplace */
1603 0, /* src_mask */
1604 0xffff, /* dst_mask */
1605 FALSE), /* pcrel_offset */
1606
1607 /* Like GOT_TLSGD16, but no overflow. */
1608 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1609 0, /* rightshift */
1610 1, /* size (0 = byte, 1 = short, 2 = long) */
1611 16, /* bitsize */
1612 FALSE, /* pc_relative */
1613 0, /* bitpos */
1614 complain_overflow_dont, /* complain_on_overflow */
1615 ppc64_elf_unhandled_reloc, /* special_function */
1616 "R_PPC64_GOT_TLSGD16_LO", /* name */
1617 FALSE, /* partial_inplace */
1618 0, /* src_mask */
1619 0xffff, /* dst_mask */
1620 FALSE), /* pcrel_offset */
1621
1622 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1623 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1624 16, /* rightshift */
1625 1, /* size (0 = byte, 1 = short, 2 = long) */
1626 16, /* bitsize */
1627 FALSE, /* pc_relative */
1628 0, /* bitpos */
1629 complain_overflow_dont, /* complain_on_overflow */
1630 ppc64_elf_unhandled_reloc, /* special_function */
1631 "R_PPC64_GOT_TLSGD16_HI", /* name */
1632 FALSE, /* partial_inplace */
1633 0, /* src_mask */
1634 0xffff, /* dst_mask */
1635 FALSE), /* pcrel_offset */
1636
1637 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1638 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1639 16, /* rightshift */
1640 1, /* size (0 = byte, 1 = short, 2 = long) */
1641 16, /* bitsize */
1642 FALSE, /* pc_relative */
1643 0, /* bitpos */
1644 complain_overflow_dont, /* complain_on_overflow */
1645 ppc64_elf_unhandled_reloc, /* special_function */
1646 "R_PPC64_GOT_TLSGD16_HA", /* name */
1647 FALSE, /* partial_inplace */
1648 0, /* src_mask */
1649 0xffff, /* dst_mask */
1650 FALSE), /* pcrel_offset */
1651
1652 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1653 with values (sym+add)@dtpmod and zero, and computes the offset to the
1654 first entry relative to the TOC base (r2). */
1655 HOWTO (R_PPC64_GOT_TLSLD16,
1656 0, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_signed, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_GOT_TLSLD16", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like GOT_TLSLD16, but no overflow. */
1670 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_dont, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_GOT_TLSLD16_LO", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xffff, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1685 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1686 16, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_GOT_TLSLD16_HI", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xffff, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1700 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1701 16, /* rightshift */
1702 1, /* size (0 = byte, 1 = short, 2 = long) */
1703 16, /* bitsize */
1704 FALSE, /* pc_relative */
1705 0, /* bitpos */
1706 complain_overflow_dont, /* complain_on_overflow */
1707 ppc64_elf_unhandled_reloc, /* special_function */
1708 "R_PPC64_GOT_TLSLD16_HA", /* name */
1709 FALSE, /* partial_inplace */
1710 0, /* src_mask */
1711 0xffff, /* dst_mask */
1712 FALSE), /* pcrel_offset */
1713
1714 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1715 the offset to the entry relative to the TOC base (r2). */
1716 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1717 0, /* rightshift */
1718 1, /* size (0 = byte, 1 = short, 2 = long) */
1719 16, /* bitsize */
1720 FALSE, /* pc_relative */
1721 0, /* bitpos */
1722 complain_overflow_signed, /* complain_on_overflow */
1723 ppc64_elf_unhandled_reloc, /* special_function */
1724 "R_PPC64_GOT_DTPREL16_DS", /* name */
1725 FALSE, /* partial_inplace */
1726 0, /* src_mask */
1727 0xfffc, /* dst_mask */
1728 FALSE), /* pcrel_offset */
1729
1730 /* Like GOT_DTPREL16_DS, but no overflow. */
1731 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1732 0, /* rightshift */
1733 1, /* size (0 = byte, 1 = short, 2 = long) */
1734 16, /* bitsize */
1735 FALSE, /* pc_relative */
1736 0, /* bitpos */
1737 complain_overflow_dont, /* complain_on_overflow */
1738 ppc64_elf_unhandled_reloc, /* special_function */
1739 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1740 FALSE, /* partial_inplace */
1741 0, /* src_mask */
1742 0xfffc, /* dst_mask */
1743 FALSE), /* pcrel_offset */
1744
1745 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1746 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1747 16, /* rightshift */
1748 1, /* size (0 = byte, 1 = short, 2 = long) */
1749 16, /* bitsize */
1750 FALSE, /* pc_relative */
1751 0, /* bitpos */
1752 complain_overflow_dont, /* complain_on_overflow */
1753 ppc64_elf_unhandled_reloc, /* special_function */
1754 "R_PPC64_GOT_DTPREL16_HI", /* name */
1755 FALSE, /* partial_inplace */
1756 0, /* src_mask */
1757 0xffff, /* dst_mask */
1758 FALSE), /* pcrel_offset */
1759
1760 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1761 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1762 16, /* rightshift */
1763 1, /* size (0 = byte, 1 = short, 2 = long) */
1764 16, /* bitsize */
1765 FALSE, /* pc_relative */
1766 0, /* bitpos */
1767 complain_overflow_dont, /* complain_on_overflow */
1768 ppc64_elf_unhandled_reloc, /* special_function */
1769 "R_PPC64_GOT_DTPREL16_HA", /* name */
1770 FALSE, /* partial_inplace */
1771 0, /* src_mask */
1772 0xffff, /* dst_mask */
1773 FALSE), /* pcrel_offset */
1774
1775 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1776 offset to the entry relative to the TOC base (r2). */
1777 HOWTO (R_PPC64_GOT_TPREL16_DS,
1778 0, /* rightshift */
1779 1, /* size (0 = byte, 1 = short, 2 = long) */
1780 16, /* bitsize */
1781 FALSE, /* pc_relative */
1782 0, /* bitpos */
1783 complain_overflow_signed, /* complain_on_overflow */
1784 ppc64_elf_unhandled_reloc, /* special_function */
1785 "R_PPC64_GOT_TPREL16_DS", /* name */
1786 FALSE, /* partial_inplace */
1787 0, /* src_mask */
1788 0xfffc, /* dst_mask */
1789 FALSE), /* pcrel_offset */
1790
1791 /* Like GOT_TPREL16_DS, but no overflow. */
1792 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1793 0, /* rightshift */
1794 1, /* size (0 = byte, 1 = short, 2 = long) */
1795 16, /* bitsize */
1796 FALSE, /* pc_relative */
1797 0, /* bitpos */
1798 complain_overflow_dont, /* complain_on_overflow */
1799 ppc64_elf_unhandled_reloc, /* special_function */
1800 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1801 FALSE, /* partial_inplace */
1802 0, /* src_mask */
1803 0xfffc, /* dst_mask */
1804 FALSE), /* pcrel_offset */
1805
1806 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1807 HOWTO (R_PPC64_GOT_TPREL16_HI,
1808 16, /* rightshift */
1809 1, /* size (0 = byte, 1 = short, 2 = long) */
1810 16, /* bitsize */
1811 FALSE, /* pc_relative */
1812 0, /* bitpos */
1813 complain_overflow_dont, /* complain_on_overflow */
1814 ppc64_elf_unhandled_reloc, /* special_function */
1815 "R_PPC64_GOT_TPREL16_HI", /* name */
1816 FALSE, /* partial_inplace */
1817 0, /* src_mask */
1818 0xffff, /* dst_mask */
1819 FALSE), /* pcrel_offset */
1820
1821 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1822 HOWTO (R_PPC64_GOT_TPREL16_HA,
1823 16, /* rightshift */
1824 1, /* size (0 = byte, 1 = short, 2 = long) */
1825 16, /* bitsize */
1826 FALSE, /* pc_relative */
1827 0, /* bitpos */
1828 complain_overflow_dont, /* complain_on_overflow */
1829 ppc64_elf_unhandled_reloc, /* special_function */
1830 "R_PPC64_GOT_TPREL16_HA", /* name */
1831 FALSE, /* partial_inplace */
1832 0, /* src_mask */
1833 0xffff, /* dst_mask */
1834 FALSE), /* pcrel_offset */
1835
1836 /* GNU extension to record C++ vtable hierarchy. */
1837 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1838 0, /* rightshift */
1839 0, /* size (0 = byte, 1 = short, 2 = long) */
1840 0, /* bitsize */
1841 FALSE, /* pc_relative */
1842 0, /* bitpos */
1843 complain_overflow_dont, /* complain_on_overflow */
1844 NULL, /* special_function */
1845 "R_PPC64_GNU_VTINHERIT", /* name */
1846 FALSE, /* partial_inplace */
1847 0, /* src_mask */
1848 0, /* dst_mask */
1849 FALSE), /* pcrel_offset */
1850
1851 /* GNU extension to record C++ vtable member usage. */
1852 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1853 0, /* rightshift */
1854 0, /* size (0 = byte, 1 = short, 2 = long) */
1855 0, /* bitsize */
1856 FALSE, /* pc_relative */
1857 0, /* bitpos */
1858 complain_overflow_dont, /* complain_on_overflow */
1859 NULL, /* special_function */
1860 "R_PPC64_GNU_VTENTRY", /* name */
1861 FALSE, /* partial_inplace */
1862 0, /* src_mask */
1863 0, /* dst_mask */
1864 FALSE), /* pcrel_offset */
1865 };
1866
1867 \f
1868 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1869 be done. */
1870
1871 static void
1872 ppc_howto_init (void)
1873 {
1874 unsigned int i, type;
1875
1876 for (i = 0;
1877 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1878 i++)
1879 {
1880 type = ppc64_elf_howto_raw[i].type;
1881 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1882 / sizeof (ppc64_elf_howto_table[0])));
1883 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1884 }
1885 }
1886
1887 static reloc_howto_type *
1888 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1889 bfd_reloc_code_real_type code)
1890 {
1891 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1892
1893 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1894 /* Initialize howto table if needed. */
1895 ppc_howto_init ();
1896
1897 switch (code)
1898 {
1899 default:
1900 return NULL;
1901
1902 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1903 break;
1904 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1905 break;
1906 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1907 break;
1908 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1909 break;
1910 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1911 break;
1912 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1913 break;
1914 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1915 break;
1916 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1917 break;
1918 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1919 break;
1920 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1921 break;
1922 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1923 break;
1924 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1925 break;
1926 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1927 break;
1928 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1929 break;
1930 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1931 break;
1932 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1933 break;
1934 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1935 break;
1936 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1937 break;
1938 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1939 break;
1940 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1941 break;
1942 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1943 break;
1944 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1945 break;
1946 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1947 break;
1948 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1949 break;
1950 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1951 break;
1952 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1953 break;
1954 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1955 break;
1956 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1957 break;
1958 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1959 break;
1960 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1961 break;
1962 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1963 break;
1964 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1965 break;
1966 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1967 break;
1968 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1969 break;
1970 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1971 break;
1972 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1973 break;
1974 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1975 break;
1976 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1977 break;
1978 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1979 break;
1980 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1981 break;
1982 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1983 break;
1984 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1985 break;
1986 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1987 break;
1988 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1989 break;
1990 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1991 break;
1992 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1993 break;
1994 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1995 break;
1996 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1997 break;
1998 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1999 break;
2000 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2001 break;
2002 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2003 break;
2004 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2005 break;
2006 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2007 break;
2008 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2009 break;
2010 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2011 break;
2012 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2013 break;
2014 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2015 break;
2016 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2017 break;
2018 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2019 break;
2020 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2021 break;
2022 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2023 break;
2024 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2025 break;
2026 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2027 break;
2028 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2029 break;
2030 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2031 break;
2032 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2033 break;
2034 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2035 break;
2036 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2037 break;
2038 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2039 break;
2040 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2041 break;
2042 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2043 break;
2044 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2045 break;
2046 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2047 break;
2048 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2049 break;
2050 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2051 break;
2052 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2053 break;
2054 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2065 break;
2066 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2067 break;
2068 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2069 break;
2070 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2071 break;
2072 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2073 break;
2074 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2075 break;
2076 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2077 break;
2078 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2079 break;
2080 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2081 break;
2082 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2083 break;
2084 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2085 break;
2086 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2087 break;
2088 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2089 break;
2090 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2091 break;
2092 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2093 break;
2094 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2095 break;
2096 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2097 break;
2098 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2099 break;
2100 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2101 break;
2102 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2103 break;
2104 }
2105
2106 return ppc64_elf_howto_table[r];
2107 };
2108
2109 /* Set the howto pointer for a PowerPC ELF reloc. */
2110
2111 static void
2112 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2113 Elf_Internal_Rela *dst)
2114 {
2115 unsigned int type;
2116
2117 /* Initialize howto table if needed. */
2118 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2119 ppc_howto_init ();
2120
2121 type = ELF64_R_TYPE (dst->r_info);
2122 if (type >= (sizeof (ppc64_elf_howto_table)
2123 / sizeof (ppc64_elf_howto_table[0])))
2124 {
2125 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2126 abfd, (int) type);
2127 type = R_PPC64_NONE;
2128 }
2129 cache_ptr->howto = ppc64_elf_howto_table[type];
2130 }
2131
2132 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2133
2134 static bfd_reloc_status_type
2135 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2136 void *data, asection *input_section,
2137 bfd *output_bfd, char **error_message)
2138 {
2139 /* If this is a relocatable link (output_bfd test tells us), just
2140 call the generic function. Any adjustment will be done at final
2141 link time. */
2142 if (output_bfd != NULL)
2143 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2144 input_section, output_bfd, error_message);
2145
2146 /* Adjust the addend for sign extension of the low 16 bits.
2147 We won't actually be using the low 16 bits, so trashing them
2148 doesn't matter. */
2149 reloc_entry->addend += 0x8000;
2150 return bfd_reloc_continue;
2151 }
2152
2153 static bfd_reloc_status_type
2154 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2155 void *data, asection *input_section,
2156 bfd *output_bfd, char **error_message)
2157 {
2158 if (output_bfd != NULL)
2159 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2160 input_section, output_bfd, error_message);
2161
2162 if (strcmp (symbol->section->name, ".opd") == 0
2163 && (symbol->section->owner->flags & DYNAMIC) == 0)
2164 {
2165 bfd_vma dest = opd_entry_value (symbol->section,
2166 symbol->value + reloc_entry->addend,
2167 NULL, NULL);
2168 if (dest != (bfd_vma) -1)
2169 reloc_entry->addend = dest - (symbol->value
2170 + symbol->section->output_section->vma
2171 + symbol->section->output_offset);
2172 }
2173 return bfd_reloc_continue;
2174 }
2175
2176 static bfd_reloc_status_type
2177 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2178 void *data, asection *input_section,
2179 bfd *output_bfd, char **error_message)
2180 {
2181 long insn;
2182 enum elf_ppc64_reloc_type r_type;
2183 bfd_size_type octets;
2184 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2185 bfd_boolean is_power4 = FALSE;
2186
2187 /* If this is a relocatable link (output_bfd test tells us), just
2188 call the generic function. Any adjustment will be done at final
2189 link time. */
2190 if (output_bfd != NULL)
2191 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2192 input_section, output_bfd, error_message);
2193
2194 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2195 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2196 insn &= ~(0x01 << 21);
2197 r_type = reloc_entry->howto->type;
2198 if (r_type == R_PPC64_ADDR14_BRTAKEN
2199 || r_type == R_PPC64_REL14_BRTAKEN)
2200 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2201
2202 if (is_power4)
2203 {
2204 /* Set 'a' bit. This is 0b00010 in BO field for branch
2205 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2206 for branch on CTR insns (BO == 1a00t or 1a01t). */
2207 if ((insn & (0x14 << 21)) == (0x04 << 21))
2208 insn |= 0x02 << 21;
2209 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2210 insn |= 0x08 << 21;
2211 else
2212 goto out;
2213 }
2214 else
2215 {
2216 bfd_vma target = 0;
2217 bfd_vma from;
2218
2219 if (!bfd_is_com_section (symbol->section))
2220 target = symbol->value;
2221 target += symbol->section->output_section->vma;
2222 target += symbol->section->output_offset;
2223 target += reloc_entry->addend;
2224
2225 from = (reloc_entry->address
2226 + input_section->output_offset
2227 + input_section->output_section->vma);
2228
2229 /* Invert 'y' bit if not the default. */
2230 if ((bfd_signed_vma) (target - from) < 0)
2231 insn ^= 0x01 << 21;
2232 }
2233 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2234 out:
2235 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2236 input_section, output_bfd, error_message);
2237 }
2238
2239 static bfd_reloc_status_type
2240 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2241 void *data, asection *input_section,
2242 bfd *output_bfd, char **error_message)
2243 {
2244 /* If this is a relocatable link (output_bfd test tells us), just
2245 call the generic function. Any adjustment will be done at final
2246 link time. */
2247 if (output_bfd != NULL)
2248 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2249 input_section, output_bfd, error_message);
2250
2251 /* Subtract the symbol section base address. */
2252 reloc_entry->addend -= symbol->section->output_section->vma;
2253 return bfd_reloc_continue;
2254 }
2255
2256 static bfd_reloc_status_type
2257 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2258 void *data, asection *input_section,
2259 bfd *output_bfd, char **error_message)
2260 {
2261 /* If this is a relocatable link (output_bfd test tells us), just
2262 call the generic function. Any adjustment will be done at final
2263 link time. */
2264 if (output_bfd != NULL)
2265 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2266 input_section, output_bfd, error_message);
2267
2268 /* Subtract the symbol section base address. */
2269 reloc_entry->addend -= symbol->section->output_section->vma;
2270
2271 /* Adjust the addend for sign extension of the low 16 bits. */
2272 reloc_entry->addend += 0x8000;
2273 return bfd_reloc_continue;
2274 }
2275
2276 static bfd_reloc_status_type
2277 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2278 void *data, asection *input_section,
2279 bfd *output_bfd, char **error_message)
2280 {
2281 bfd_vma TOCstart;
2282
2283 /* If this is a relocatable link (output_bfd test tells us), just
2284 call the generic function. Any adjustment will be done at final
2285 link time. */
2286 if (output_bfd != NULL)
2287 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2288 input_section, output_bfd, error_message);
2289
2290 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2291 if (TOCstart == 0)
2292 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2293
2294 /* Subtract the TOC base address. */
2295 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2296 return bfd_reloc_continue;
2297 }
2298
2299 static bfd_reloc_status_type
2300 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2301 void *data, asection *input_section,
2302 bfd *output_bfd, char **error_message)
2303 {
2304 bfd_vma TOCstart;
2305
2306 /* If this is a relocatable link (output_bfd test tells us), just
2307 call the generic function. Any adjustment will be done at final
2308 link time. */
2309 if (output_bfd != NULL)
2310 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2311 input_section, output_bfd, error_message);
2312
2313 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2314 if (TOCstart == 0)
2315 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2316
2317 /* Subtract the TOC base address. */
2318 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2319
2320 /* Adjust the addend for sign extension of the low 16 bits. */
2321 reloc_entry->addend += 0x8000;
2322 return bfd_reloc_continue;
2323 }
2324
2325 static bfd_reloc_status_type
2326 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2327 void *data, asection *input_section,
2328 bfd *output_bfd, char **error_message)
2329 {
2330 bfd_vma TOCstart;
2331 bfd_size_type octets;
2332
2333 /* If this is a relocatable link (output_bfd test tells us), just
2334 call the generic function. Any adjustment will be done at final
2335 link time. */
2336 if (output_bfd != NULL)
2337 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2338 input_section, output_bfd, error_message);
2339
2340 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2341 if (TOCstart == 0)
2342 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2343
2344 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2345 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2346 return bfd_reloc_ok;
2347 }
2348
2349 static bfd_reloc_status_type
2350 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2351 void *data, asection *input_section,
2352 bfd *output_bfd, char **error_message)
2353 {
2354 /* If this is a relocatable link (output_bfd test tells us), just
2355 call the generic function. Any adjustment will be done at final
2356 link time. */
2357 if (output_bfd != NULL)
2358 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2359 input_section, output_bfd, error_message);
2360
2361 if (error_message != NULL)
2362 {
2363 static char buf[60];
2364 sprintf (buf, "generic linker can't handle %s",
2365 reloc_entry->howto->name);
2366 *error_message = buf;
2367 }
2368 return bfd_reloc_dangerous;
2369 }
2370
2371 struct ppc64_elf_obj_tdata
2372 {
2373 struct elf_obj_tdata elf;
2374
2375 /* Shortcuts to dynamic linker sections. */
2376 asection *got;
2377 asection *relgot;
2378
2379 union {
2380 /* Used during garbage collection. We attach global symbols defined
2381 on removed .opd entries to this section so that the sym is removed. */
2382 asection *deleted_section;
2383
2384 /* Used when adding symbols. */
2385 bfd_boolean has_dotsym;
2386 } u;
2387
2388 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2389 sections means we potentially need one of these for each input bfd. */
2390 union {
2391 bfd_signed_vma refcount;
2392 bfd_vma offset;
2393 } tlsld_got;
2394
2395 /* A copy of relocs before they are modified for --emit-relocs. */
2396 Elf_Internal_Rela *opd_relocs;
2397 };
2398
2399 #define ppc64_elf_tdata(bfd) \
2400 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2401
2402 #define ppc64_tlsld_got(bfd) \
2403 (&ppc64_elf_tdata (bfd)->tlsld_got)
2404
2405 /* Override the generic function because we store some extras. */
2406
2407 static bfd_boolean
2408 ppc64_elf_mkobject (bfd *abfd)
2409 {
2410 if (abfd->tdata.any == NULL)
2411 {
2412 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2413 abfd->tdata.any = bfd_zalloc (abfd, amt);
2414 if (abfd->tdata.any == NULL)
2415 return FALSE;
2416 }
2417 return bfd_elf_mkobject (abfd);
2418 }
2419
2420 /* Return 1 if target is one of ours. */
2421
2422 static bfd_boolean
2423 is_ppc64_elf_target (const struct bfd_target *targ)
2424 {
2425 extern const bfd_target bfd_elf64_powerpc_vec;
2426 extern const bfd_target bfd_elf64_powerpcle_vec;
2427
2428 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2429 }
2430
2431 /* Fix bad default arch selected for a 64 bit input bfd when the
2432 default is 32 bit. */
2433
2434 static bfd_boolean
2435 ppc64_elf_object_p (bfd *abfd)
2436 {
2437 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2438 {
2439 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2440
2441 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2442 {
2443 /* Relies on arch after 32 bit default being 64 bit default. */
2444 abfd->arch_info = abfd->arch_info->next;
2445 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2446 }
2447 }
2448 return TRUE;
2449 }
2450
2451 /* Support for core dump NOTE sections. */
2452
2453 static bfd_boolean
2454 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2455 {
2456 size_t offset, size;
2457
2458 if (note->descsz != 504)
2459 return FALSE;
2460
2461 /* pr_cursig */
2462 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2463
2464 /* pr_pid */
2465 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2466
2467 /* pr_reg */
2468 offset = 112;
2469 size = 384;
2470
2471 /* Make a ".reg/999" section. */
2472 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2473 size, note->descpos + offset);
2474 }
2475
2476 static bfd_boolean
2477 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2478 {
2479 if (note->descsz != 136)
2480 return FALSE;
2481
2482 elf_tdata (abfd)->core_program
2483 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2484 elf_tdata (abfd)->core_command
2485 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2486
2487 return TRUE;
2488 }
2489
2490 /* Merge backend specific data from an object file to the output
2491 object file when linking. */
2492
2493 static bfd_boolean
2494 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2495 {
2496 /* Check if we have the same endianess. */
2497 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2498 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2499 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2500 {
2501 const char *msg;
2502
2503 if (bfd_big_endian (ibfd))
2504 msg = _("%B: compiled for a big endian system "
2505 "and target is little endian");
2506 else
2507 msg = _("%B: compiled for a little endian system "
2508 "and target is big endian");
2509
2510 (*_bfd_error_handler) (msg, ibfd);
2511
2512 bfd_set_error (bfd_error_wrong_format);
2513 return FALSE;
2514 }
2515
2516 return TRUE;
2517 }
2518
2519 /* Add extra PPC sections. */
2520
2521 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2522 {
2523 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2524 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2525 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2526 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2527 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2528 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2529 { NULL, 0, 0, 0, 0 }
2530 };
2531
2532 struct _ppc64_elf_section_data
2533 {
2534 struct bfd_elf_section_data elf;
2535
2536 /* An array with one entry for each opd function descriptor. */
2537 union
2538 {
2539 /* Points to the function code section for local opd entries. */
2540 asection **func_sec;
2541 /* After editing .opd, adjust references to opd local syms. */
2542 long *adjust;
2543 } opd;
2544
2545 /* An array for toc sections, indexed by offset/8.
2546 Specifies the relocation symbol index used at a given toc offset. */
2547 unsigned *t_symndx;
2548 };
2549
2550 #define ppc64_elf_section_data(sec) \
2551 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2552
2553 static bfd_boolean
2554 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2555 {
2556 if (!sec->used_by_bfd)
2557 {
2558 struct _ppc64_elf_section_data *sdata;
2559 bfd_size_type amt = sizeof (*sdata);
2560
2561 sdata = bfd_zalloc (abfd, amt);
2562 if (sdata == NULL)
2563 return FALSE;
2564 sec->used_by_bfd = sdata;
2565 }
2566
2567 return _bfd_elf_new_section_hook (abfd, sec);
2568 }
2569
2570 static void *
2571 get_opd_info (asection * sec)
2572 {
2573 if (sec != NULL
2574 && ppc64_elf_section_data (sec) != NULL
2575 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2576 return ppc64_elf_section_data (sec)->opd.adjust;
2577 return NULL;
2578 }
2579 \f
2580 /* Parameters for the qsort hook. */
2581 static asection *synthetic_opd;
2582 static bfd_boolean synthetic_relocatable;
2583
2584 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2585
2586 static int
2587 compare_symbols (const void *ap, const void *bp)
2588 {
2589 const asymbol *a = * (const asymbol **) ap;
2590 const asymbol *b = * (const asymbol **) bp;
2591
2592 /* Section symbols first. */
2593 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2594 return -1;
2595 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2596 return 1;
2597
2598 /* then .opd symbols. */
2599 if (a->section == synthetic_opd && b->section != synthetic_opd)
2600 return -1;
2601 if (a->section != synthetic_opd && b->section == synthetic_opd)
2602 return 1;
2603
2604 /* then other code symbols. */
2605 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2606 == (SEC_CODE | SEC_ALLOC)
2607 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2608 != (SEC_CODE | SEC_ALLOC))
2609 return -1;
2610
2611 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2612 != (SEC_CODE | SEC_ALLOC)
2613 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2614 == (SEC_CODE | SEC_ALLOC))
2615 return 1;
2616
2617 if (synthetic_relocatable)
2618 {
2619 if (a->section->id < b->section->id)
2620 return -1;
2621
2622 if (a->section->id > b->section->id)
2623 return 1;
2624 }
2625
2626 if (a->value + a->section->vma < b->value + b->section->vma)
2627 return -1;
2628
2629 if (a->value + a->section->vma > b->value + b->section->vma)
2630 return 1;
2631
2632 /* For syms with the same value, prefer strong dynamic global function
2633 syms over other syms. */
2634 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2635 return -1;
2636
2637 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2638 return 1;
2639
2640 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2641 return -1;
2642
2643 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2644 return 1;
2645
2646 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2647 return -1;
2648
2649 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2650 return 1;
2651
2652 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2653 return -1;
2654
2655 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2656 return 1;
2657
2658 return 0;
2659 }
2660
2661 /* Search SYMS for a symbol of the given VALUE. */
2662
2663 static asymbol *
2664 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2665 {
2666 long mid;
2667
2668 if (id == -1)
2669 {
2670 while (lo < hi)
2671 {
2672 mid = (lo + hi) >> 1;
2673 if (syms[mid]->value + syms[mid]->section->vma < value)
2674 lo = mid + 1;
2675 else if (syms[mid]->value + syms[mid]->section->vma > value)
2676 hi = mid;
2677 else
2678 return syms[mid];
2679 }
2680 }
2681 else
2682 {
2683 while (lo < hi)
2684 {
2685 mid = (lo + hi) >> 1;
2686 if (syms[mid]->section->id < id)
2687 lo = mid + 1;
2688 else if (syms[mid]->section->id > id)
2689 hi = mid;
2690 else if (syms[mid]->value < value)
2691 lo = mid + 1;
2692 else if (syms[mid]->value > value)
2693 hi = mid;
2694 else
2695 return syms[mid];
2696 }
2697 }
2698 return NULL;
2699 }
2700
2701 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2702 entry syms. */
2703
2704 static long
2705 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2706 long static_count, asymbol **static_syms,
2707 long dyn_count, asymbol **dyn_syms,
2708 asymbol **ret)
2709 {
2710 asymbol *s;
2711 long i;
2712 long count;
2713 char *names;
2714 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2715 asection *opd;
2716 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2717 asymbol **syms;
2718
2719 *ret = NULL;
2720
2721 opd = bfd_get_section_by_name (abfd, ".opd");
2722 if (opd == NULL)
2723 return 0;
2724
2725 symcount = static_count;
2726 if (!relocatable)
2727 symcount += dyn_count;
2728 if (symcount == 0)
2729 return 0;
2730
2731 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2732 if (syms == NULL)
2733 return -1;
2734
2735 if (!relocatable && static_count != 0 && dyn_count != 0)
2736 {
2737 /* Use both symbol tables. */
2738 memcpy (syms, static_syms, static_count * sizeof (*syms));
2739 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2740 }
2741 else if (!relocatable && static_count == 0)
2742 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2743 else
2744 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2745
2746 synthetic_opd = opd;
2747 synthetic_relocatable = relocatable;
2748 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2749
2750 if (!relocatable && symcount > 1)
2751 {
2752 long j;
2753 /* Trim duplicate syms, since we may have merged the normal and
2754 dynamic symbols. Actually, we only care about syms that have
2755 different values, so trim any with the same value. */
2756 for (i = 1, j = 1; i < symcount; ++i)
2757 if (syms[i - 1]->value + syms[i - 1]->section->vma
2758 != syms[i]->value + syms[i]->section->vma)
2759 syms[j++] = syms[i];
2760 symcount = j;
2761 }
2762
2763 i = 0;
2764 if (syms[i]->section == opd)
2765 ++i;
2766 codesecsym = i;
2767
2768 for (; i < symcount; ++i)
2769 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2770 != (SEC_CODE | SEC_ALLOC))
2771 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2772 break;
2773 codesecsymend = i;
2774
2775 for (; i < symcount; ++i)
2776 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2777 break;
2778 secsymend = i;
2779
2780 for (; i < symcount; ++i)
2781 if (syms[i]->section != opd)
2782 break;
2783 opdsymend = i;
2784
2785 for (; i < symcount; ++i)
2786 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2787 != (SEC_CODE | SEC_ALLOC))
2788 break;
2789 symcount = i;
2790
2791 count = 0;
2792 if (opdsymend == secsymend)
2793 goto done;
2794
2795 if (relocatable)
2796 {
2797 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2798 arelent *r;
2799 size_t size;
2800 long relcount;
2801
2802 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2803 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2804 if (relcount == 0)
2805 goto done;
2806
2807 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2808 {
2809 count = -1;
2810 goto done;
2811 }
2812
2813 size = 0;
2814 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2815 {
2816 asymbol *sym;
2817
2818 while (r < opd->relocation + relcount
2819 && r->address < syms[i]->value + opd->vma)
2820 ++r;
2821
2822 if (r == opd->relocation + relcount)
2823 break;
2824
2825 if (r->address != syms[i]->value + opd->vma)
2826 continue;
2827
2828 if (r->howto->type != R_PPC64_ADDR64)
2829 continue;
2830
2831 sym = *r->sym_ptr_ptr;
2832 if (!sym_exists_at (syms, opdsymend, symcount,
2833 sym->section->id, sym->value + r->addend))
2834 {
2835 ++count;
2836 size += sizeof (asymbol);
2837 size += strlen (syms[i]->name) + 2;
2838 }
2839 }
2840
2841 s = *ret = bfd_malloc (size);
2842 if (s == NULL)
2843 {
2844 count = -1;
2845 goto done;
2846 }
2847
2848 names = (char *) (s + count);
2849
2850 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2851 {
2852 asymbol *sym;
2853
2854 while (r < opd->relocation + relcount
2855 && r->address < syms[i]->value + opd->vma)
2856 ++r;
2857
2858 if (r == opd->relocation + relcount)
2859 break;
2860
2861 if (r->address != syms[i]->value + opd->vma)
2862 continue;
2863
2864 if (r->howto->type != R_PPC64_ADDR64)
2865 continue;
2866
2867 sym = *r->sym_ptr_ptr;
2868 if (!sym_exists_at (syms, opdsymend, symcount,
2869 sym->section->id, sym->value + r->addend))
2870 {
2871 size_t len;
2872
2873 *s = *syms[i];
2874 s->section = sym->section;
2875 s->value = sym->value + r->addend;
2876 s->name = names;
2877 *names++ = '.';
2878 len = strlen (syms[i]->name);
2879 memcpy (names, syms[i]->name, len + 1);
2880 names += len + 1;
2881 s++;
2882 }
2883 }
2884 }
2885 else
2886 {
2887 bfd_byte *contents;
2888 size_t size;
2889
2890 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2891 {
2892 if (contents)
2893 {
2894 free_contents_and_exit:
2895 free (contents);
2896 }
2897 count = -1;
2898 goto done;
2899 }
2900
2901 size = 0;
2902 for (i = secsymend; i < opdsymend; ++i)
2903 {
2904 bfd_vma ent;
2905
2906 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2907 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2908 {
2909 ++count;
2910 size += sizeof (asymbol);
2911 size += strlen (syms[i]->name) + 2;
2912 }
2913 }
2914
2915 s = *ret = bfd_malloc (size);
2916 if (s == NULL)
2917 goto free_contents_and_exit;
2918
2919 names = (char *) (s + count);
2920
2921 for (i = secsymend; i < opdsymend; ++i)
2922 {
2923 bfd_vma ent;
2924
2925 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2926 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2927 {
2928 long lo, hi;
2929 size_t len;
2930 asection *sec = abfd->sections;
2931
2932 *s = *syms[i];
2933 lo = codesecsym;
2934 hi = codesecsymend;
2935 while (lo < hi)
2936 {
2937 long mid = (lo + hi) >> 1;
2938 if (syms[mid]->section->vma < ent)
2939 lo = mid + 1;
2940 else if (syms[mid]->section->vma > ent)
2941 hi = mid;
2942 else
2943 {
2944 sec = syms[mid]->section;
2945 break;
2946 }
2947 }
2948
2949 if (lo >= hi && lo > codesecsym)
2950 sec = syms[lo - 1]->section;
2951
2952 for (; sec != NULL; sec = sec->next)
2953 {
2954 if (sec->vma > ent)
2955 break;
2956 if ((sec->flags & SEC_ALLOC) == 0
2957 || (sec->flags & SEC_LOAD) == 0)
2958 break;
2959 if ((sec->flags & SEC_CODE) != 0)
2960 s->section = sec;
2961 }
2962 s->value = ent - s->section->vma;
2963 s->name = names;
2964 *names++ = '.';
2965 len = strlen (syms[i]->name);
2966 memcpy (names, syms[i]->name, len + 1);
2967 names += len + 1;
2968 s++;
2969 }
2970 }
2971 free (contents);
2972 }
2973
2974 done:
2975 free (syms);
2976 return count;
2977 }
2978 \f
2979 /* The following functions are specific to the ELF linker, while
2980 functions above are used generally. Those named ppc64_elf_* are
2981 called by the main ELF linker code. They appear in this file more
2982 or less in the order in which they are called. eg.
2983 ppc64_elf_check_relocs is called early in the link process,
2984 ppc64_elf_finish_dynamic_sections is one of the last functions
2985 called.
2986
2987 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2988 functions have both a function code symbol and a function descriptor
2989 symbol. A call to foo in a relocatable object file looks like:
2990
2991 . .text
2992 . x:
2993 . bl .foo
2994 . nop
2995
2996 The function definition in another object file might be:
2997
2998 . .section .opd
2999 . foo: .quad .foo
3000 . .quad .TOC.@tocbase
3001 . .quad 0
3002 .
3003 . .text
3004 . .foo: blr
3005
3006 When the linker resolves the call during a static link, the branch
3007 unsurprisingly just goes to .foo and the .opd information is unused.
3008 If the function definition is in a shared library, things are a little
3009 different: The call goes via a plt call stub, the opd information gets
3010 copied to the plt, and the linker patches the nop.
3011
3012 . x:
3013 . bl .foo_stub
3014 . ld 2,40(1)
3015 .
3016 .
3017 . .foo_stub:
3018 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3019 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3020 . std 2,40(1) # this is the general idea
3021 . ld 11,0(12)
3022 . ld 2,8(12)
3023 . mtctr 11
3024 . ld 11,16(12)
3025 . bctr
3026 .
3027 . .section .plt
3028 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3029
3030 The "reloc ()" notation is supposed to indicate that the linker emits
3031 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3032 copying.
3033
3034 What are the difficulties here? Well, firstly, the relocations
3035 examined by the linker in check_relocs are against the function code
3036 sym .foo, while the dynamic relocation in the plt is emitted against
3037 the function descriptor symbol, foo. Somewhere along the line, we need
3038 to carefully copy dynamic link information from one symbol to the other.
3039 Secondly, the generic part of the elf linker will make .foo a dynamic
3040 symbol as is normal for most other backends. We need foo dynamic
3041 instead, at least for an application final link. However, when
3042 creating a shared library containing foo, we need to have both symbols
3043 dynamic so that references to .foo are satisfied during the early
3044 stages of linking. Otherwise the linker might decide to pull in a
3045 definition from some other object, eg. a static library.
3046
3047 Update: As of August 2004, we support a new convention. Function
3048 calls may use the function descriptor symbol, ie. "bl foo". This
3049 behaves exactly as "bl .foo". */
3050
3051 /* The linker needs to keep track of the number of relocs that it
3052 decides to copy as dynamic relocs in check_relocs for each symbol.
3053 This is so that it can later discard them if they are found to be
3054 unnecessary. We store the information in a field extending the
3055 regular ELF linker hash table. */
3056
3057 struct ppc_dyn_relocs
3058 {
3059 struct ppc_dyn_relocs *next;
3060
3061 /* The input section of the reloc. */
3062 asection *sec;
3063
3064 /* Total number of relocs copied for the input section. */
3065 bfd_size_type count;
3066
3067 /* Number of pc-relative relocs copied for the input section. */
3068 bfd_size_type pc_count;
3069 };
3070
3071 /* Track GOT entries needed for a given symbol. We might need more
3072 than one got entry per symbol. */
3073 struct got_entry
3074 {
3075 struct got_entry *next;
3076
3077 /* The symbol addend that we'll be placing in the GOT. */
3078 bfd_vma addend;
3079
3080 /* Unlike other ELF targets, we use separate GOT entries for the same
3081 symbol referenced from different input files. This is to support
3082 automatic multiple TOC/GOT sections, where the TOC base can vary
3083 from one input file to another.
3084
3085 Point to the BFD owning this GOT entry. */
3086 bfd *owner;
3087
3088 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3089 TLS_TPREL or TLS_DTPREL for tls entries. */
3090 char tls_type;
3091
3092 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3093 union
3094 {
3095 bfd_signed_vma refcount;
3096 bfd_vma offset;
3097 } got;
3098 };
3099
3100 /* The same for PLT. */
3101 struct plt_entry
3102 {
3103 struct plt_entry *next;
3104
3105 bfd_vma addend;
3106
3107 union
3108 {
3109 bfd_signed_vma refcount;
3110 bfd_vma offset;
3111 } plt;
3112 };
3113
3114 /* Of those relocs that might be copied as dynamic relocs, this macro
3115 selects those that must be copied when linking a shared library,
3116 even when the symbol is local. */
3117
3118 #define MUST_BE_DYN_RELOC(RTYPE) \
3119 ((RTYPE) != R_PPC64_REL32 \
3120 && (RTYPE) != R_PPC64_REL64 \
3121 && (RTYPE) != R_PPC64_REL30)
3122
3123 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3124 copying dynamic variables from a shared lib into an app's dynbss
3125 section, and instead use a dynamic relocation to point into the
3126 shared lib. With code that gcc generates, it's vital that this be
3127 enabled; In the PowerPC64 ABI, the address of a function is actually
3128 the address of a function descriptor, which resides in the .opd
3129 section. gcc uses the descriptor directly rather than going via the
3130 GOT as some other ABI's do, which means that initialized function
3131 pointers must reference the descriptor. Thus, a function pointer
3132 initialized to the address of a function in a shared library will
3133 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3134 redefines the function descriptor symbol to point to the copy. This
3135 presents a problem as a plt entry for that function is also
3136 initialized from the function descriptor symbol and the copy reloc
3137 may not be initialized first. */
3138 #define ELIMINATE_COPY_RELOCS 1
3139
3140 /* Section name for stubs is the associated section name plus this
3141 string. */
3142 #define STUB_SUFFIX ".stub"
3143
3144 /* Linker stubs.
3145 ppc_stub_long_branch:
3146 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3147 destination, but a 24 bit branch in a stub section will reach.
3148 . b dest
3149
3150 ppc_stub_plt_branch:
3151 Similar to the above, but a 24 bit branch in the stub section won't
3152 reach its destination.
3153 . addis %r12,%r2,xxx@toc@ha
3154 . ld %r11,xxx@toc@l(%r12)
3155 . mtctr %r11
3156 . bctr
3157
3158 ppc_stub_plt_call:
3159 Used to call a function in a shared library. If it so happens that
3160 the plt entry referenced crosses a 64k boundary, then an extra
3161 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3162 xxx+16 as appropriate.
3163 . addis %r12,%r2,xxx@toc@ha
3164 . std %r2,40(%r1)
3165 . ld %r11,xxx+0@toc@l(%r12)
3166 . ld %r2,xxx+8@toc@l(%r12)
3167 . mtctr %r11
3168 . ld %r11,xxx+16@toc@l(%r12)
3169 . bctr
3170
3171 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3172 code to adjust the value and save r2 to support multiple toc sections.
3173 A ppc_stub_long_branch with an r2 offset looks like:
3174 . std %r2,40(%r1)
3175 . addis %r2,%r2,off@ha
3176 . addi %r2,%r2,off@l
3177 . b dest
3178
3179 A ppc_stub_plt_branch with an r2 offset looks like:
3180 . std %r2,40(%r1)
3181 . addis %r12,%r2,xxx@toc@ha
3182 . ld %r11,xxx@toc@l(%r12)
3183 . addis %r2,%r2,off@ha
3184 . addi %r2,%r2,off@l
3185 . mtctr %r11
3186 . bctr
3187 */
3188
3189 enum ppc_stub_type {
3190 ppc_stub_none,
3191 ppc_stub_long_branch,
3192 ppc_stub_long_branch_r2off,
3193 ppc_stub_plt_branch,
3194 ppc_stub_plt_branch_r2off,
3195 ppc_stub_plt_call
3196 };
3197
3198 struct ppc_stub_hash_entry {
3199
3200 /* Base hash table entry structure. */
3201 struct bfd_hash_entry root;
3202
3203 enum ppc_stub_type stub_type;
3204
3205 /* The stub section. */
3206 asection *stub_sec;
3207
3208 /* Offset within stub_sec of the beginning of this stub. */
3209 bfd_vma stub_offset;
3210
3211 /* Given the symbol's value and its section we can determine its final
3212 value when building the stubs (so the stub knows where to jump. */
3213 bfd_vma target_value;
3214 asection *target_section;
3215
3216 /* The symbol table entry, if any, that this was derived from. */
3217 struct ppc_link_hash_entry *h;
3218
3219 /* And the reloc addend that this was derived from. */
3220 bfd_vma addend;
3221
3222 /* Where this stub is being called from, or, in the case of combined
3223 stub sections, the first input section in the group. */
3224 asection *id_sec;
3225 };
3226
3227 struct ppc_branch_hash_entry {
3228
3229 /* Base hash table entry structure. */
3230 struct bfd_hash_entry root;
3231
3232 /* Offset within branch lookup table. */
3233 unsigned int offset;
3234
3235 /* Generation marker. */
3236 unsigned int iter;
3237 };
3238
3239 struct ppc_link_hash_entry
3240 {
3241 struct elf_link_hash_entry elf;
3242
3243 /* A pointer to the most recently used stub hash entry against this
3244 symbol. */
3245 struct ppc_stub_hash_entry *stub_cache;
3246
3247 /* Track dynamic relocs copied for this symbol. */
3248 struct ppc_dyn_relocs *dyn_relocs;
3249
3250 /* Link between function code and descriptor symbols. */
3251 struct ppc_link_hash_entry *oh;
3252
3253 /* Flag function code and descriptor symbols. */
3254 unsigned int is_func:1;
3255 unsigned int is_func_descriptor:1;
3256 unsigned int fake:1;
3257
3258 /* Whether global opd/toc sym has been adjusted or not.
3259 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3260 should be set for all globals defined in any opd/toc section. */
3261 unsigned int adjust_done:1;
3262
3263 /* Set if we twiddled this symbol to weak at some stage. */
3264 unsigned int was_undefined:1;
3265
3266 /* Contexts in which symbol is used in the GOT (or TOC).
3267 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3268 corresponding relocs are encountered during check_relocs.
3269 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3270 indicate the corresponding GOT entry type is not needed.
3271 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3272 a TPREL one. We use a separate flag rather than setting TPREL
3273 just for convenience in distinguishing the two cases. */
3274 #define TLS_GD 1 /* GD reloc. */
3275 #define TLS_LD 2 /* LD reloc. */
3276 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3277 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3278 #define TLS_TLS 16 /* Any TLS reloc. */
3279 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3280 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3281 char tls_mask;
3282 };
3283
3284 /* ppc64 ELF linker hash table. */
3285
3286 struct ppc_link_hash_table
3287 {
3288 struct elf_link_hash_table elf;
3289
3290 /* The stub hash table. */
3291 struct bfd_hash_table stub_hash_table;
3292
3293 /* Another hash table for plt_branch stubs. */
3294 struct bfd_hash_table branch_hash_table;
3295
3296 /* Linker stub bfd. */
3297 bfd *stub_bfd;
3298
3299 /* Linker call-backs. */
3300 asection * (*add_stub_section) (const char *, asection *);
3301 void (*layout_sections_again) (void);
3302
3303 /* Array to keep track of which stub sections have been created, and
3304 information on stub grouping. */
3305 struct map_stub {
3306 /* This is the section to which stubs in the group will be attached. */
3307 asection *link_sec;
3308 /* The stub section. */
3309 asection *stub_sec;
3310 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3311 bfd_vma toc_off;
3312 } *stub_group;
3313
3314 /* Temp used when calculating TOC pointers. */
3315 bfd_vma toc_curr;
3316
3317 /* Highest input section id. */
3318 int top_id;
3319
3320 /* Highest output section index. */
3321 int top_index;
3322
3323 /* List of input sections for each output section. */
3324 asection **input_list;
3325
3326 /* Short-cuts to get to dynamic linker sections. */
3327 asection *got;
3328 asection *plt;
3329 asection *relplt;
3330 asection *dynbss;
3331 asection *relbss;
3332 asection *glink;
3333 asection *sfpr;
3334 asection *brlt;
3335 asection *relbrlt;
3336
3337 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3338 struct ppc_link_hash_entry *tls_get_addr;
3339 struct ppc_link_hash_entry *tls_get_addr_fd;
3340
3341 /* Statistics. */
3342 unsigned long stub_count[ppc_stub_plt_call];
3343
3344 /* Number of stubs against global syms. */
3345 unsigned long stub_globals;
3346
3347 /* Set if we should emit symbols for stubs. */
3348 unsigned int emit_stub_syms:1;
3349
3350 /* Support for multiple toc sections. */
3351 unsigned int no_multi_toc:1;
3352 unsigned int multi_toc_needed:1;
3353
3354 /* Set on error. */
3355 unsigned int stub_error:1;
3356
3357 /* Flag set when small branches are detected. Used to
3358 select suitable defaults for the stub group size. */
3359 unsigned int has_14bit_branch:1;
3360
3361 /* Temp used by ppc64_elf_check_directives. */
3362 unsigned int twiddled_syms:1;
3363
3364 /* Incremented every time we size stubs. */
3365 unsigned int stub_iteration;
3366
3367 /* Small local sym to section mapping cache. */
3368 struct sym_sec_cache sym_sec;
3369 };
3370
3371 /* Rename some of the generic section flags to better document how they
3372 are used here. */
3373 #define has_toc_reloc has_gp_reloc
3374 #define makes_toc_func_call need_finalize_relax
3375 #define call_check_in_progress reloc_done
3376
3377 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3378
3379 #define ppc_hash_table(p) \
3380 ((struct ppc_link_hash_table *) ((p)->hash))
3381
3382 #define ppc_stub_hash_lookup(table, string, create, copy) \
3383 ((struct ppc_stub_hash_entry *) \
3384 bfd_hash_lookup ((table), (string), (create), (copy)))
3385
3386 #define ppc_branch_hash_lookup(table, string, create, copy) \
3387 ((struct ppc_branch_hash_entry *) \
3388 bfd_hash_lookup ((table), (string), (create), (copy)))
3389
3390 /* Create an entry in the stub hash table. */
3391
3392 static struct bfd_hash_entry *
3393 stub_hash_newfunc (struct bfd_hash_entry *entry,
3394 struct bfd_hash_table *table,
3395 const char *string)
3396 {
3397 /* Allocate the structure if it has not already been allocated by a
3398 subclass. */
3399 if (entry == NULL)
3400 {
3401 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3402 if (entry == NULL)
3403 return entry;
3404 }
3405
3406 /* Call the allocation method of the superclass. */
3407 entry = bfd_hash_newfunc (entry, table, string);
3408 if (entry != NULL)
3409 {
3410 struct ppc_stub_hash_entry *eh;
3411
3412 /* Initialize the local fields. */
3413 eh = (struct ppc_stub_hash_entry *) entry;
3414 eh->stub_type = ppc_stub_none;
3415 eh->stub_sec = NULL;
3416 eh->stub_offset = 0;
3417 eh->target_value = 0;
3418 eh->target_section = NULL;
3419 eh->h = NULL;
3420 eh->id_sec = NULL;
3421 }
3422
3423 return entry;
3424 }
3425
3426 /* Create an entry in the branch hash table. */
3427
3428 static struct bfd_hash_entry *
3429 branch_hash_newfunc (struct bfd_hash_entry *entry,
3430 struct bfd_hash_table *table,
3431 const char *string)
3432 {
3433 /* Allocate the structure if it has not already been allocated by a
3434 subclass. */
3435 if (entry == NULL)
3436 {
3437 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3438 if (entry == NULL)
3439 return entry;
3440 }
3441
3442 /* Call the allocation method of the superclass. */
3443 entry = bfd_hash_newfunc (entry, table, string);
3444 if (entry != NULL)
3445 {
3446 struct ppc_branch_hash_entry *eh;
3447
3448 /* Initialize the local fields. */
3449 eh = (struct ppc_branch_hash_entry *) entry;
3450 eh->offset = 0;
3451 eh->iter = 0;
3452 }
3453
3454 return entry;
3455 }
3456
3457 /* Create an entry in a ppc64 ELF linker hash table. */
3458
3459 static struct bfd_hash_entry *
3460 link_hash_newfunc (struct bfd_hash_entry *entry,
3461 struct bfd_hash_table *table,
3462 const char *string)
3463 {
3464 /* Allocate the structure if it has not already been allocated by a
3465 subclass. */
3466 if (entry == NULL)
3467 {
3468 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3469 if (entry == NULL)
3470 return entry;
3471 }
3472
3473 /* Call the allocation method of the superclass. */
3474 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3475 if (entry != NULL)
3476 {
3477 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3478
3479 memset (&eh->stub_cache, 0,
3480 (sizeof (struct ppc_link_hash_entry)
3481 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3482 }
3483
3484 return entry;
3485 }
3486
3487 /* Create a ppc64 ELF linker hash table. */
3488
3489 static struct bfd_link_hash_table *
3490 ppc64_elf_link_hash_table_create (bfd *abfd)
3491 {
3492 struct ppc_link_hash_table *htab;
3493 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3494
3495 htab = bfd_zmalloc (amt);
3496 if (htab == NULL)
3497 return NULL;
3498
3499 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3500 sizeof (struct ppc_link_hash_entry)))
3501 {
3502 free (htab);
3503 return NULL;
3504 }
3505
3506 /* Init the stub hash table too. */
3507 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3508 sizeof (struct ppc_stub_hash_entry)))
3509 return NULL;
3510
3511 /* And the branch hash table. */
3512 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3513 sizeof (struct ppc_branch_hash_entry)))
3514 return NULL;
3515
3516 /* Initializing two fields of the union is just cosmetic. We really
3517 only care about glist, but when compiled on a 32-bit host the
3518 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3519 debugger inspection of these fields look nicer. */
3520 htab->elf.init_got_refcount.refcount = 0;
3521 htab->elf.init_got_refcount.glist = NULL;
3522 htab->elf.init_plt_refcount.refcount = 0;
3523 htab->elf.init_plt_refcount.glist = NULL;
3524 htab->elf.init_got_offset.offset = 0;
3525 htab->elf.init_got_offset.glist = NULL;
3526 htab->elf.init_plt_offset.offset = 0;
3527 htab->elf.init_plt_offset.glist = NULL;
3528
3529 return &htab->elf.root;
3530 }
3531
3532 /* Free the derived linker hash table. */
3533
3534 static void
3535 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3536 {
3537 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3538
3539 bfd_hash_table_free (&ret->stub_hash_table);
3540 bfd_hash_table_free (&ret->branch_hash_table);
3541 _bfd_generic_link_hash_table_free (hash);
3542 }
3543
3544 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3545
3546 void
3547 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3548 {
3549 struct ppc_link_hash_table *htab;
3550
3551 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3552
3553 /* Always hook our dynamic sections into the first bfd, which is the
3554 linker created stub bfd. This ensures that the GOT header is at
3555 the start of the output TOC section. */
3556 htab = ppc_hash_table (info);
3557 htab->stub_bfd = abfd;
3558 htab->elf.dynobj = abfd;
3559 }
3560
3561 /* Build a name for an entry in the stub hash table. */
3562
3563 static char *
3564 ppc_stub_name (const asection *input_section,
3565 const asection *sym_sec,
3566 const struct ppc_link_hash_entry *h,
3567 const Elf_Internal_Rela *rel)
3568 {
3569 char *stub_name;
3570 bfd_size_type len;
3571
3572 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3573 offsets from a sym as a branch target? In fact, we could
3574 probably assume the addend is always zero. */
3575 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3576
3577 if (h)
3578 {
3579 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3580 stub_name = bfd_malloc (len);
3581 if (stub_name == NULL)
3582 return stub_name;
3583
3584 sprintf (stub_name, "%08x.%s+%x",
3585 input_section->id & 0xffffffff,
3586 h->elf.root.root.string,
3587 (int) rel->r_addend & 0xffffffff);
3588 }
3589 else
3590 {
3591 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3592 stub_name = bfd_malloc (len);
3593 if (stub_name == NULL)
3594 return stub_name;
3595
3596 sprintf (stub_name, "%08x.%x:%x+%x",
3597 input_section->id & 0xffffffff,
3598 sym_sec->id & 0xffffffff,
3599 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3600 (int) rel->r_addend & 0xffffffff);
3601 }
3602 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3603 stub_name[len - 2] = 0;
3604 return stub_name;
3605 }
3606
3607 /* Look up an entry in the stub hash. Stub entries are cached because
3608 creating the stub name takes a bit of time. */
3609
3610 static struct ppc_stub_hash_entry *
3611 ppc_get_stub_entry (const asection *input_section,
3612 const asection *sym_sec,
3613 struct ppc_link_hash_entry *h,
3614 const Elf_Internal_Rela *rel,
3615 struct ppc_link_hash_table *htab)
3616 {
3617 struct ppc_stub_hash_entry *stub_entry;
3618 const asection *id_sec;
3619
3620 /* If this input section is part of a group of sections sharing one
3621 stub section, then use the id of the first section in the group.
3622 Stub names need to include a section id, as there may well be
3623 more than one stub used to reach say, printf, and we need to
3624 distinguish between them. */
3625 id_sec = htab->stub_group[input_section->id].link_sec;
3626
3627 if (h != NULL && h->stub_cache != NULL
3628 && h->stub_cache->h == h
3629 && h->stub_cache->id_sec == id_sec)
3630 {
3631 stub_entry = h->stub_cache;
3632 }
3633 else
3634 {
3635 char *stub_name;
3636
3637 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3638 if (stub_name == NULL)
3639 return NULL;
3640
3641 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3642 stub_name, FALSE, FALSE);
3643 if (h != NULL)
3644 h->stub_cache = stub_entry;
3645
3646 free (stub_name);
3647 }
3648
3649 return stub_entry;
3650 }
3651
3652 /* Add a new stub entry to the stub hash. Not all fields of the new
3653 stub entry are initialised. */
3654
3655 static struct ppc_stub_hash_entry *
3656 ppc_add_stub (const char *stub_name,
3657 asection *section,
3658 struct ppc_link_hash_table *htab)
3659 {
3660 asection *link_sec;
3661 asection *stub_sec;
3662 struct ppc_stub_hash_entry *stub_entry;
3663
3664 link_sec = htab->stub_group[section->id].link_sec;
3665 stub_sec = htab->stub_group[section->id].stub_sec;
3666 if (stub_sec == NULL)
3667 {
3668 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3669 if (stub_sec == NULL)
3670 {
3671 size_t namelen;
3672 bfd_size_type len;
3673 char *s_name;
3674
3675 namelen = strlen (link_sec->name);
3676 len = namelen + sizeof (STUB_SUFFIX);
3677 s_name = bfd_alloc (htab->stub_bfd, len);
3678 if (s_name == NULL)
3679 return NULL;
3680
3681 memcpy (s_name, link_sec->name, namelen);
3682 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3683 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3684 if (stub_sec == NULL)
3685 return NULL;
3686 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3687 }
3688 htab->stub_group[section->id].stub_sec = stub_sec;
3689 }
3690
3691 /* Enter this entry into the linker stub hash table. */
3692 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3693 TRUE, FALSE);
3694 if (stub_entry == NULL)
3695 {
3696 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3697 section->owner, stub_name);
3698 return NULL;
3699 }
3700
3701 stub_entry->stub_sec = stub_sec;
3702 stub_entry->stub_offset = 0;
3703 stub_entry->id_sec = link_sec;
3704 return stub_entry;
3705 }
3706
3707 /* Create sections for linker generated code. */
3708
3709 static bfd_boolean
3710 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3711 {
3712 struct ppc_link_hash_table *htab;
3713 flagword flags;
3714
3715 htab = ppc_hash_table (info);
3716
3717 /* Create .sfpr for code to save and restore fp regs. */
3718 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3719 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3720 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3721 flags);
3722 if (htab->sfpr == NULL
3723 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3724 return FALSE;
3725
3726 /* Create .glink for lazy dynamic linking support. */
3727 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3728 flags);
3729 if (htab->glink == NULL
3730 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3731 return FALSE;
3732
3733 /* Create branch lookup table for plt_branch stubs. */
3734 if (info->shared)
3735 {
3736 flags = (SEC_ALLOC | SEC_LOAD
3737 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3738 htab->brlt
3739 = bfd_make_section_anyway_with_flags (dynobj, ".data.rel.ro.brlt",
3740 flags);
3741 }
3742 else
3743 {
3744 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3745 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3746 htab->brlt
3747 = bfd_make_section_anyway_with_flags (dynobj, ".rodata.brlt", flags);
3748 }
3749
3750 if (htab->brlt == NULL
3751 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3752 return FALSE;
3753
3754 if (info->shared)
3755 {
3756 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3757 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3758 htab->relbrlt
3759 = bfd_make_section_anyway_with_flags (dynobj, ".rela.data.rel.ro.brlt",
3760 flags);
3761 }
3762 else if (info->emitrelocations)
3763 {
3764 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3765 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3766 htab->relbrlt
3767 = bfd_make_section_anyway_with_flags (dynobj, ".rela.rodata.brlt",
3768 flags);
3769 }
3770 else
3771 return TRUE;
3772
3773 if (!htab->relbrlt
3774 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3775 return FALSE;
3776
3777 return TRUE;
3778 }
3779
3780 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3781 not already done. */
3782
3783 static bfd_boolean
3784 create_got_section (bfd *abfd, struct bfd_link_info *info)
3785 {
3786 asection *got, *relgot;
3787 flagword flags;
3788 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3789
3790 if (!htab->got)
3791 {
3792 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3793 return FALSE;
3794
3795 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3796 if (!htab->got)
3797 abort ();
3798 }
3799
3800 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3801 | SEC_LINKER_CREATED);
3802
3803 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3804 if (!got
3805 || !bfd_set_section_alignment (abfd, got, 3))
3806 return FALSE;
3807
3808 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3809 flags | SEC_READONLY);
3810 if (!relgot
3811 || ! bfd_set_section_alignment (abfd, relgot, 3))
3812 return FALSE;
3813
3814 ppc64_elf_tdata (abfd)->got = got;
3815 ppc64_elf_tdata (abfd)->relgot = relgot;
3816 return TRUE;
3817 }
3818
3819 /* Create the dynamic sections, and set up shortcuts. */
3820
3821 static bfd_boolean
3822 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3823 {
3824 struct ppc_link_hash_table *htab;
3825
3826 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3827 return FALSE;
3828
3829 htab = ppc_hash_table (info);
3830 if (!htab->got)
3831 htab->got = bfd_get_section_by_name (dynobj, ".got");
3832 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3833 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3834 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3835 if (!info->shared)
3836 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3837
3838 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3839 || (!info->shared && !htab->relbss))
3840 abort ();
3841
3842 return TRUE;
3843 }
3844
3845 /* Merge PLT info on FROM with that on TO. */
3846
3847 static void
3848 move_plt_plist (struct ppc_link_hash_entry *from,
3849 struct ppc_link_hash_entry *to)
3850 {
3851 if (from->elf.plt.plist != NULL)
3852 {
3853 if (to->elf.plt.plist != NULL)
3854 {
3855 struct plt_entry **entp;
3856 struct plt_entry *ent;
3857
3858 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3859 {
3860 struct plt_entry *dent;
3861
3862 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3863 if (dent->addend == ent->addend)
3864 {
3865 dent->plt.refcount += ent->plt.refcount;
3866 *entp = ent->next;
3867 break;
3868 }
3869 if (dent == NULL)
3870 entp = &ent->next;
3871 }
3872 *entp = to->elf.plt.plist;
3873 }
3874
3875 to->elf.plt.plist = from->elf.plt.plist;
3876 from->elf.plt.plist = NULL;
3877 }
3878 }
3879
3880 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3881
3882 static void
3883 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3884 struct elf_link_hash_entry *dir,
3885 struct elf_link_hash_entry *ind)
3886 {
3887 struct ppc_link_hash_entry *edir, *eind;
3888
3889 edir = (struct ppc_link_hash_entry *) dir;
3890 eind = (struct ppc_link_hash_entry *) ind;
3891
3892 /* Copy over any dynamic relocs we may have on the indirect sym. */
3893 if (eind->dyn_relocs != NULL)
3894 {
3895 if (edir->dyn_relocs != NULL)
3896 {
3897 struct ppc_dyn_relocs **pp;
3898 struct ppc_dyn_relocs *p;
3899
3900 /* Add reloc counts against the indirect sym to the direct sym
3901 list. Merge any entries against the same section. */
3902 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3903 {
3904 struct ppc_dyn_relocs *q;
3905
3906 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3907 if (q->sec == p->sec)
3908 {
3909 q->pc_count += p->pc_count;
3910 q->count += p->count;
3911 *pp = p->next;
3912 break;
3913 }
3914 if (q == NULL)
3915 pp = &p->next;
3916 }
3917 *pp = edir->dyn_relocs;
3918 }
3919
3920 edir->dyn_relocs = eind->dyn_relocs;
3921 eind->dyn_relocs = NULL;
3922 }
3923
3924 edir->is_func |= eind->is_func;
3925 edir->is_func_descriptor |= eind->is_func_descriptor;
3926 edir->tls_mask |= eind->tls_mask;
3927
3928 /* If called to transfer flags for a weakdef during processing
3929 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3930 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3931 if (!(ELIMINATE_COPY_RELOCS
3932 && eind->elf.root.type != bfd_link_hash_indirect
3933 && edir->elf.dynamic_adjusted))
3934 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3935
3936 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3937 edir->elf.ref_regular |= eind->elf.ref_regular;
3938 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3939 edir->elf.needs_plt |= eind->elf.needs_plt;
3940
3941 /* If we were called to copy over info for a weak sym, that's all. */
3942 if (eind->elf.root.type != bfd_link_hash_indirect)
3943 return;
3944
3945 /* Copy over got entries that we may have already seen to the
3946 symbol which just became indirect. */
3947 if (eind->elf.got.glist != NULL)
3948 {
3949 if (edir->elf.got.glist != NULL)
3950 {
3951 struct got_entry **entp;
3952 struct got_entry *ent;
3953
3954 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3955 {
3956 struct got_entry *dent;
3957
3958 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3959 if (dent->addend == ent->addend
3960 && dent->owner == ent->owner
3961 && dent->tls_type == ent->tls_type)
3962 {
3963 dent->got.refcount += ent->got.refcount;
3964 *entp = ent->next;
3965 break;
3966 }
3967 if (dent == NULL)
3968 entp = &ent->next;
3969 }
3970 *entp = edir->elf.got.glist;
3971 }
3972
3973 edir->elf.got.glist = eind->elf.got.glist;
3974 eind->elf.got.glist = NULL;
3975 }
3976
3977 /* And plt entries. */
3978 move_plt_plist (eind, edir);
3979
3980 if (eind->elf.dynindx != -1)
3981 {
3982 if (edir->elf.dynindx != -1)
3983 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3984 edir->elf.dynstr_index);
3985 edir->elf.dynindx = eind->elf.dynindx;
3986 edir->elf.dynstr_index = eind->elf.dynstr_index;
3987 eind->elf.dynindx = -1;
3988 eind->elf.dynstr_index = 0;
3989 }
3990 }
3991
3992 /* Find the function descriptor hash entry from the given function code
3993 hash entry FH. Link the entries via their OH fields. */
3994
3995 static struct ppc_link_hash_entry *
3996 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3997 {
3998 struct ppc_link_hash_entry *fdh = fh->oh;
3999
4000 if (fdh == NULL)
4001 {
4002 const char *fd_name = fh->elf.root.root.string + 1;
4003
4004 fdh = (struct ppc_link_hash_entry *)
4005 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4006 if (fdh != NULL)
4007 {
4008 fdh->is_func_descriptor = 1;
4009 fdh->oh = fh;
4010 fh->is_func = 1;
4011 fh->oh = fdh;
4012 }
4013 }
4014
4015 return fdh;
4016 }
4017
4018 /* Make a fake function descriptor sym for the code sym FH. */
4019
4020 static struct ppc_link_hash_entry *
4021 make_fdh (struct bfd_link_info *info,
4022 struct ppc_link_hash_entry *fh)
4023 {
4024 bfd *abfd;
4025 asymbol *newsym;
4026 struct bfd_link_hash_entry *bh;
4027 struct ppc_link_hash_entry *fdh;
4028
4029 abfd = fh->elf.root.u.undef.abfd;
4030 newsym = bfd_make_empty_symbol (abfd);
4031 newsym->name = fh->elf.root.root.string + 1;
4032 newsym->section = bfd_und_section_ptr;
4033 newsym->value = 0;
4034 newsym->flags = BSF_WEAK;
4035
4036 bh = NULL;
4037 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4038 newsym->flags, newsym->section,
4039 newsym->value, NULL, FALSE, FALSE,
4040 &bh))
4041 return NULL;
4042
4043 fdh = (struct ppc_link_hash_entry *) bh;
4044 fdh->elf.non_elf = 0;
4045 fdh->fake = 1;
4046 fdh->is_func_descriptor = 1;
4047 fdh->oh = fh;
4048 fh->is_func = 1;
4049 fh->oh = fdh;
4050 return fdh;
4051 }
4052
4053 /* Hacks to support old ABI code.
4054 When making function calls, old ABI code references function entry
4055 points (dot symbols), while new ABI code references the function
4056 descriptor symbol. We need to make any combination of reference and
4057 definition work together, without breaking archive linking.
4058
4059 For a defined function "foo" and an undefined call to "bar":
4060 An old object defines "foo" and ".foo", references ".bar" (possibly
4061 "bar" too).
4062 A new object defines "foo" and references "bar".
4063
4064 A new object thus has no problem with its undefined symbols being
4065 satisfied by definitions in an old object. On the other hand, the
4066 old object won't have ".bar" satisfied by a new object. */
4067
4068 /* Fix function descriptor symbols defined in .opd sections to be
4069 function type. */
4070
4071 static bfd_boolean
4072 ppc64_elf_add_symbol_hook (bfd *ibfd,
4073 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4074 Elf_Internal_Sym *isym,
4075 const char **name,
4076 flagword *flags ATTRIBUTE_UNUSED,
4077 asection **sec,
4078 bfd_vma *value ATTRIBUTE_UNUSED)
4079 {
4080 if (*sec != NULL
4081 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4082 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4083
4084 if ((*name)[0] == '.'
4085 && ELF_ST_BIND (isym->st_info) == STB_GLOBAL
4086 && ELF_ST_TYPE (isym->st_info) < STT_SECTION
4087 && is_ppc64_elf_target (ibfd->xvec))
4088 ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
4089
4090 return TRUE;
4091 }
4092
4093 /* This function makes an old ABI object reference to ".bar" cause the
4094 inclusion of a new ABI object archive that defines "bar".
4095 NAME is a symbol defined in an archive. Return a symbol in the hash
4096 table that might be satisfied by the archive symbols. */
4097
4098 static struct elf_link_hash_entry *
4099 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4100 struct bfd_link_info *info,
4101 const char *name)
4102 {
4103 struct elf_link_hash_entry *h;
4104 char *dot_name;
4105 size_t len;
4106
4107 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4108 if (h != NULL
4109 /* Don't return this sym if it is a fake function descriptor
4110 created by add_symbol_adjust. */
4111 && !(h->root.type == bfd_link_hash_undefweak
4112 && ((struct ppc_link_hash_entry *) h)->fake))
4113 return h;
4114
4115 if (name[0] == '.')
4116 return h;
4117
4118 len = strlen (name);
4119 dot_name = bfd_alloc (abfd, len + 2);
4120 if (dot_name == NULL)
4121 return (struct elf_link_hash_entry *) 0 - 1;
4122 dot_name[0] = '.';
4123 memcpy (dot_name + 1, name, len + 1);
4124 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4125 bfd_release (abfd, dot_name);
4126 return h;
4127 }
4128
4129 /* This function satisfies all old ABI object references to ".bar" if a
4130 new ABI object defines "bar". Well, at least, undefined dot symbols
4131 are made weak. This stops later archive searches from including an
4132 object if we already have a function descriptor definition. It also
4133 prevents the linker complaining about undefined symbols.
4134 We also check and correct mismatched symbol visibility here. The
4135 most restrictive visibility of the function descriptor and the
4136 function entry symbol is used. */
4137
4138 struct add_symbol_adjust_data
4139 {
4140 struct bfd_link_info *info;
4141 bfd_boolean ok;
4142 };
4143
4144 static bfd_boolean
4145 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4146 {
4147 struct add_symbol_adjust_data *data;
4148 struct ppc_link_hash_table *htab;
4149 struct ppc_link_hash_entry *eh;
4150 struct ppc_link_hash_entry *fdh;
4151
4152 if (h->root.type == bfd_link_hash_indirect)
4153 return TRUE;
4154
4155 if (h->root.type == bfd_link_hash_warning)
4156 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4157
4158 if (h->root.root.string[0] != '.')
4159 return TRUE;
4160
4161 data = inf;
4162 htab = ppc_hash_table (data->info);
4163 eh = (struct ppc_link_hash_entry *) h;
4164 fdh = get_fdh (eh, htab);
4165 if (fdh == NULL
4166 && !data->info->relocatable
4167 && (eh->elf.root.type == bfd_link_hash_undefined
4168 || eh->elf.root.type == bfd_link_hash_undefweak)
4169 && eh->elf.ref_regular)
4170 {
4171 /* Make an undefweak function descriptor sym, which is enough to
4172 pull in an --as-needed shared lib, but won't cause link
4173 errors. Archives are handled elsewhere. */
4174 fdh = make_fdh (data->info, eh);
4175 if (fdh == NULL)
4176 data->ok = FALSE;
4177 else
4178 fdh->elf.ref_regular = 1;
4179 }
4180 else if (fdh != NULL)
4181 {
4182 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4183 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4184 if (entry_vis < descr_vis)
4185 fdh->elf.other += entry_vis - descr_vis;
4186 else if (entry_vis > descr_vis)
4187 eh->elf.other += descr_vis - entry_vis;
4188
4189 if ((fdh->elf.root.type == bfd_link_hash_defined
4190 || fdh->elf.root.type == bfd_link_hash_defweak)
4191 && eh->elf.root.type == bfd_link_hash_undefined)
4192 {
4193 eh->elf.root.type = bfd_link_hash_undefweak;
4194 eh->was_undefined = 1;
4195 htab->twiddled_syms = 1;
4196 }
4197 }
4198
4199 return TRUE;
4200 }
4201
4202 static bfd_boolean
4203 ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
4204 {
4205 struct ppc_link_hash_table *htab;
4206 struct add_symbol_adjust_data data;
4207
4208 if (!is_ppc64_elf_target (abfd->xvec))
4209 return TRUE;
4210
4211 if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
4212 return TRUE;
4213 ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
4214
4215 htab = ppc_hash_table (info);
4216 if (!is_ppc64_elf_target (htab->elf.root.creator))
4217 return TRUE;
4218
4219 data.info = info;
4220 data.ok = TRUE;
4221 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4222
4223 /* We need to fix the undefs list for any syms we have twiddled to
4224 undef_weak. */
4225 if (htab->twiddled_syms)
4226 {
4227 bfd_link_repair_undef_list (&htab->elf.root);
4228 htab->twiddled_syms = 0;
4229 }
4230 return data.ok;
4231 }
4232
4233 static bfd_boolean
4234 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4235 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4236 {
4237 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4238 char *local_got_tls_masks;
4239
4240 if (local_got_ents == NULL)
4241 {
4242 bfd_size_type size = symtab_hdr->sh_info;
4243
4244 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4245 local_got_ents = bfd_zalloc (abfd, size);
4246 if (local_got_ents == NULL)
4247 return FALSE;
4248 elf_local_got_ents (abfd) = local_got_ents;
4249 }
4250
4251 if ((tls_type & TLS_EXPLICIT) == 0)
4252 {
4253 struct got_entry *ent;
4254
4255 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4256 if (ent->addend == r_addend
4257 && ent->owner == abfd
4258 && ent->tls_type == tls_type)
4259 break;
4260 if (ent == NULL)
4261 {
4262 bfd_size_type amt = sizeof (*ent);
4263 ent = bfd_alloc (abfd, amt);
4264 if (ent == NULL)
4265 return FALSE;
4266 ent->next = local_got_ents[r_symndx];
4267 ent->addend = r_addend;
4268 ent->owner = abfd;
4269 ent->tls_type = tls_type;
4270 ent->got.refcount = 0;
4271 local_got_ents[r_symndx] = ent;
4272 }
4273 ent->got.refcount += 1;
4274 }
4275
4276 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4277 local_got_tls_masks[r_symndx] |= tls_type;
4278 return TRUE;
4279 }
4280
4281 static bfd_boolean
4282 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4283 {
4284 struct plt_entry *ent;
4285
4286 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4287 if (ent->addend == addend)
4288 break;
4289 if (ent == NULL)
4290 {
4291 bfd_size_type amt = sizeof (*ent);
4292 ent = bfd_alloc (abfd, amt);
4293 if (ent == NULL)
4294 return FALSE;
4295 ent->next = eh->elf.plt.plist;
4296 ent->addend = addend;
4297 ent->plt.refcount = 0;
4298 eh->elf.plt.plist = ent;
4299 }
4300 ent->plt.refcount += 1;
4301 eh->elf.needs_plt = 1;
4302 if (eh->elf.root.root.string[0] == '.'
4303 && eh->elf.root.root.string[1] != '\0')
4304 eh->is_func = 1;
4305 return TRUE;
4306 }
4307
4308 /* Look through the relocs for a section during the first phase, and
4309 calculate needed space in the global offset table, procedure
4310 linkage table, and dynamic reloc sections. */
4311
4312 static bfd_boolean
4313 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4314 asection *sec, const Elf_Internal_Rela *relocs)
4315 {
4316 struct ppc_link_hash_table *htab;
4317 Elf_Internal_Shdr *symtab_hdr;
4318 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4319 const Elf_Internal_Rela *rel;
4320 const Elf_Internal_Rela *rel_end;
4321 asection *sreloc;
4322 asection **opd_sym_map;
4323
4324 if (info->relocatable)
4325 return TRUE;
4326
4327 /* Don't do anything special with non-loaded, non-alloced sections.
4328 In particular, any relocs in such sections should not affect GOT
4329 and PLT reference counting (ie. we don't allow them to create GOT
4330 or PLT entries), there's no possibility or desire to optimize TLS
4331 relocs, and there's not much point in propagating relocs to shared
4332 libs that the dynamic linker won't relocate. */
4333 if ((sec->flags & SEC_ALLOC) == 0)
4334 return TRUE;
4335
4336 htab = ppc_hash_table (info);
4337 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4338
4339 sym_hashes = elf_sym_hashes (abfd);
4340 sym_hashes_end = (sym_hashes
4341 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4342 - symtab_hdr->sh_info);
4343
4344 sreloc = NULL;
4345 opd_sym_map = NULL;
4346 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4347 {
4348 /* Garbage collection needs some extra help with .opd sections.
4349 We don't want to necessarily keep everything referenced by
4350 relocs in .opd, as that would keep all functions. Instead,
4351 if we reference an .opd symbol (a function descriptor), we
4352 want to keep the function code symbol's section. This is
4353 easy for global symbols, but for local syms we need to keep
4354 information about the associated function section. Later, if
4355 edit_opd deletes entries, we'll use this array to adjust
4356 local syms in .opd. */
4357 union opd_info {
4358 asection *func_section;
4359 long entry_adjust;
4360 };
4361 bfd_size_type amt;
4362
4363 amt = sec->size * sizeof (union opd_info) / 8;
4364 opd_sym_map = bfd_zalloc (abfd, amt);
4365 if (opd_sym_map == NULL)
4366 return FALSE;
4367 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4368 }
4369
4370 if (htab->sfpr == NULL
4371 && !create_linkage_sections (htab->elf.dynobj, info))
4372 return FALSE;
4373
4374 rel_end = relocs + sec->reloc_count;
4375 for (rel = relocs; rel < rel_end; rel++)
4376 {
4377 unsigned long r_symndx;
4378 struct elf_link_hash_entry *h;
4379 enum elf_ppc64_reloc_type r_type;
4380 int tls_type = 0;
4381
4382 r_symndx = ELF64_R_SYM (rel->r_info);
4383 if (r_symndx < symtab_hdr->sh_info)
4384 h = NULL;
4385 else
4386 {
4387 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4388 while (h->root.type == bfd_link_hash_indirect
4389 || h->root.type == bfd_link_hash_warning)
4390 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4391 }
4392
4393 r_type = ELF64_R_TYPE (rel->r_info);
4394 switch (r_type)
4395 {
4396 case R_PPC64_GOT_TLSLD16:
4397 case R_PPC64_GOT_TLSLD16_LO:
4398 case R_PPC64_GOT_TLSLD16_HI:
4399 case R_PPC64_GOT_TLSLD16_HA:
4400 ppc64_tlsld_got (abfd)->refcount += 1;
4401 tls_type = TLS_TLS | TLS_LD;
4402 goto dogottls;
4403
4404 case R_PPC64_GOT_TLSGD16:
4405 case R_PPC64_GOT_TLSGD16_LO:
4406 case R_PPC64_GOT_TLSGD16_HI:
4407 case R_PPC64_GOT_TLSGD16_HA:
4408 tls_type = TLS_TLS | TLS_GD;
4409 goto dogottls;
4410
4411 case R_PPC64_GOT_TPREL16_DS:
4412 case R_PPC64_GOT_TPREL16_LO_DS:
4413 case R_PPC64_GOT_TPREL16_HI:
4414 case R_PPC64_GOT_TPREL16_HA:
4415 if (info->shared)
4416 info->flags |= DF_STATIC_TLS;
4417 tls_type = TLS_TLS | TLS_TPREL;
4418 goto dogottls;
4419
4420 case R_PPC64_GOT_DTPREL16_DS:
4421 case R_PPC64_GOT_DTPREL16_LO_DS:
4422 case R_PPC64_GOT_DTPREL16_HI:
4423 case R_PPC64_GOT_DTPREL16_HA:
4424 tls_type = TLS_TLS | TLS_DTPREL;
4425 dogottls:
4426 sec->has_tls_reloc = 1;
4427 /* Fall thru */
4428
4429 case R_PPC64_GOT16:
4430 case R_PPC64_GOT16_DS:
4431 case R_PPC64_GOT16_HA:
4432 case R_PPC64_GOT16_HI:
4433 case R_PPC64_GOT16_LO:
4434 case R_PPC64_GOT16_LO_DS:
4435 /* This symbol requires a global offset table entry. */
4436 sec->has_toc_reloc = 1;
4437 if (ppc64_elf_tdata (abfd)->got == NULL
4438 && !create_got_section (abfd, info))
4439 return FALSE;
4440
4441 if (h != NULL)
4442 {
4443 struct ppc_link_hash_entry *eh;
4444 struct got_entry *ent;
4445
4446 eh = (struct ppc_link_hash_entry *) h;
4447 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4448 if (ent->addend == rel->r_addend
4449 && ent->owner == abfd
4450 && ent->tls_type == tls_type)
4451 break;
4452 if (ent == NULL)
4453 {
4454 bfd_size_type amt = sizeof (*ent);
4455 ent = bfd_alloc (abfd, amt);
4456 if (ent == NULL)
4457 return FALSE;
4458 ent->next = eh->elf.got.glist;
4459 ent->addend = rel->r_addend;
4460 ent->owner = abfd;
4461 ent->tls_type = tls_type;
4462 ent->got.refcount = 0;
4463 eh->elf.got.glist = ent;
4464 }
4465 ent->got.refcount += 1;
4466 eh->tls_mask |= tls_type;
4467 }
4468 else
4469 /* This is a global offset table entry for a local symbol. */
4470 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4471 rel->r_addend, tls_type))
4472 return FALSE;
4473 break;
4474
4475 case R_PPC64_PLT16_HA:
4476 case R_PPC64_PLT16_HI:
4477 case R_PPC64_PLT16_LO:
4478 case R_PPC64_PLT32:
4479 case R_PPC64_PLT64:
4480 /* This symbol requires a procedure linkage table entry. We
4481 actually build the entry in adjust_dynamic_symbol,
4482 because this might be a case of linking PIC code without
4483 linking in any dynamic objects, in which case we don't
4484 need to generate a procedure linkage table after all. */
4485 if (h == NULL)
4486 {
4487 /* It does not make sense to have a procedure linkage
4488 table entry for a local symbol. */
4489 bfd_set_error (bfd_error_bad_value);
4490 return FALSE;
4491 }
4492 else
4493 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4494 rel->r_addend))
4495 return FALSE;
4496 break;
4497
4498 /* The following relocations don't need to propagate the
4499 relocation if linking a shared object since they are
4500 section relative. */
4501 case R_PPC64_SECTOFF:
4502 case R_PPC64_SECTOFF_LO:
4503 case R_PPC64_SECTOFF_HI:
4504 case R_PPC64_SECTOFF_HA:
4505 case R_PPC64_SECTOFF_DS:
4506 case R_PPC64_SECTOFF_LO_DS:
4507 case R_PPC64_DTPREL16:
4508 case R_PPC64_DTPREL16_LO:
4509 case R_PPC64_DTPREL16_HI:
4510 case R_PPC64_DTPREL16_HA:
4511 case R_PPC64_DTPREL16_DS:
4512 case R_PPC64_DTPREL16_LO_DS:
4513 case R_PPC64_DTPREL16_HIGHER:
4514 case R_PPC64_DTPREL16_HIGHERA:
4515 case R_PPC64_DTPREL16_HIGHEST:
4516 case R_PPC64_DTPREL16_HIGHESTA:
4517 break;
4518
4519 /* Nor do these. */
4520 case R_PPC64_TOC16:
4521 case R_PPC64_TOC16_LO:
4522 case R_PPC64_TOC16_HI:
4523 case R_PPC64_TOC16_HA:
4524 case R_PPC64_TOC16_DS:
4525 case R_PPC64_TOC16_LO_DS:
4526 sec->has_toc_reloc = 1;
4527 break;
4528
4529 /* This relocation describes the C++ object vtable hierarchy.
4530 Reconstruct it for later use during GC. */
4531 case R_PPC64_GNU_VTINHERIT:
4532 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4533 return FALSE;
4534 break;
4535
4536 /* This relocation describes which C++ vtable entries are actually
4537 used. Record for later use during GC. */
4538 case R_PPC64_GNU_VTENTRY:
4539 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4540 return FALSE;
4541 break;
4542
4543 case R_PPC64_REL14:
4544 case R_PPC64_REL14_BRTAKEN:
4545 case R_PPC64_REL14_BRNTAKEN:
4546 {
4547 asection *dest = NULL;
4548
4549 /* Heuristic: If jumping outside our section, chances are
4550 we are going to need a stub. */
4551 if (h != NULL)
4552 {
4553 /* If the sym is weak it may be overridden later, so
4554 don't assume we know where a weak sym lives. */
4555 if (h->root.type == bfd_link_hash_defined)
4556 dest = h->root.u.def.section;
4557 }
4558 else
4559 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4560 sec, r_symndx);
4561 if (dest != sec)
4562 htab->has_14bit_branch = 1;
4563 }
4564 /* Fall through. */
4565
4566 case R_PPC64_REL24:
4567 if (h != NULL)
4568 {
4569 /* We may need a .plt entry if the function this reloc
4570 refers to is in a shared lib. */
4571 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4572 rel->r_addend))
4573 return FALSE;
4574 if (h == &htab->tls_get_addr->elf
4575 || h == &htab->tls_get_addr_fd->elf)
4576 sec->has_tls_reloc = 1;
4577 else if (htab->tls_get_addr == NULL
4578 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4579 && (h->root.root.string[15] == 0
4580 || h->root.root.string[15] == '@'))
4581 {
4582 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4583 sec->has_tls_reloc = 1;
4584 }
4585 else if (htab->tls_get_addr_fd == NULL
4586 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4587 && (h->root.root.string[14] == 0
4588 || h->root.root.string[14] == '@'))
4589 {
4590 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4591 sec->has_tls_reloc = 1;
4592 }
4593 }
4594 break;
4595
4596 case R_PPC64_TPREL64:
4597 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4598 if (info->shared)
4599 info->flags |= DF_STATIC_TLS;
4600 goto dotlstoc;
4601
4602 case R_PPC64_DTPMOD64:
4603 if (rel + 1 < rel_end
4604 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4605 && rel[1].r_offset == rel->r_offset + 8)
4606 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4607 else
4608 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4609 goto dotlstoc;
4610
4611 case R_PPC64_DTPREL64:
4612 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4613 if (rel != relocs
4614 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4615 && rel[-1].r_offset == rel->r_offset - 8)
4616 /* This is the second reloc of a dtpmod, dtprel pair.
4617 Don't mark with TLS_DTPREL. */
4618 goto dodyn;
4619
4620 dotlstoc:
4621 sec->has_tls_reloc = 1;
4622 if (h != NULL)
4623 {
4624 struct ppc_link_hash_entry *eh;
4625 eh = (struct ppc_link_hash_entry *) h;
4626 eh->tls_mask |= tls_type;
4627 }
4628 else
4629 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4630 rel->r_addend, tls_type))
4631 return FALSE;
4632
4633 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4634 {
4635 /* One extra to simplify get_tls_mask. */
4636 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4637 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4638 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4639 return FALSE;
4640 }
4641 BFD_ASSERT (rel->r_offset % 8 == 0);
4642 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4643
4644 /* Mark the second slot of a GD or LD entry.
4645 -1 to indicate GD and -2 to indicate LD. */
4646 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4647 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4648 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4649 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4650 goto dodyn;
4651
4652 case R_PPC64_TPREL16:
4653 case R_PPC64_TPREL16_LO:
4654 case R_PPC64_TPREL16_HI:
4655 case R_PPC64_TPREL16_HA:
4656 case R_PPC64_TPREL16_DS:
4657 case R_PPC64_TPREL16_LO_DS:
4658 case R_PPC64_TPREL16_HIGHER:
4659 case R_PPC64_TPREL16_HIGHERA:
4660 case R_PPC64_TPREL16_HIGHEST:
4661 case R_PPC64_TPREL16_HIGHESTA:
4662 if (info->shared)
4663 {
4664 info->flags |= DF_STATIC_TLS;
4665 goto dodyn;
4666 }
4667 break;
4668
4669 case R_PPC64_ADDR64:
4670 if (opd_sym_map != NULL
4671 && rel + 1 < rel_end
4672 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4673 {
4674 if (h != NULL)
4675 {
4676 if (h->root.root.string[0] == '.'
4677 && h->root.root.string[1] != 0
4678 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4679 ;
4680 else
4681 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4682 }
4683 else
4684 {
4685 asection *s;
4686
4687 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4688 r_symndx);
4689 if (s == NULL)
4690 return FALSE;
4691 else if (s != sec)
4692 opd_sym_map[rel->r_offset / 8] = s;
4693 }
4694 }
4695 /* Fall through. */
4696
4697 case R_PPC64_REL30:
4698 case R_PPC64_REL32:
4699 case R_PPC64_REL64:
4700 case R_PPC64_ADDR14:
4701 case R_PPC64_ADDR14_BRNTAKEN:
4702 case R_PPC64_ADDR14_BRTAKEN:
4703 case R_PPC64_ADDR16:
4704 case R_PPC64_ADDR16_DS:
4705 case R_PPC64_ADDR16_HA:
4706 case R_PPC64_ADDR16_HI:
4707 case R_PPC64_ADDR16_HIGHER:
4708 case R_PPC64_ADDR16_HIGHERA:
4709 case R_PPC64_ADDR16_HIGHEST:
4710 case R_PPC64_ADDR16_HIGHESTA:
4711 case R_PPC64_ADDR16_LO:
4712 case R_PPC64_ADDR16_LO_DS:
4713 case R_PPC64_ADDR24:
4714 case R_PPC64_ADDR32:
4715 case R_PPC64_UADDR16:
4716 case R_PPC64_UADDR32:
4717 case R_PPC64_UADDR64:
4718 case R_PPC64_TOC:
4719 if (h != NULL && !info->shared)
4720 /* We may need a copy reloc. */
4721 h->non_got_ref = 1;
4722
4723 /* Don't propagate .opd relocs. */
4724 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4725 break;
4726
4727 /* If we are creating a shared library, and this is a reloc
4728 against a global symbol, or a non PC relative reloc
4729 against a local symbol, then we need to copy the reloc
4730 into the shared library. However, if we are linking with
4731 -Bsymbolic, we do not need to copy a reloc against a
4732 global symbol which is defined in an object we are
4733 including in the link (i.e., DEF_REGULAR is set). At
4734 this point we have not seen all the input files, so it is
4735 possible that DEF_REGULAR is not set now but will be set
4736 later (it is never cleared). In case of a weak definition,
4737 DEF_REGULAR may be cleared later by a strong definition in
4738 a shared library. We account for that possibility below by
4739 storing information in the dyn_relocs field of the hash
4740 table entry. A similar situation occurs when creating
4741 shared libraries and symbol visibility changes render the
4742 symbol local.
4743
4744 If on the other hand, we are creating an executable, we
4745 may need to keep relocations for symbols satisfied by a
4746 dynamic library if we manage to avoid copy relocs for the
4747 symbol. */
4748 dodyn:
4749 if ((info->shared
4750 && (MUST_BE_DYN_RELOC (r_type)
4751 || (h != NULL
4752 && (! info->symbolic
4753 || h->root.type == bfd_link_hash_defweak
4754 || !h->def_regular))))
4755 || (ELIMINATE_COPY_RELOCS
4756 && !info->shared
4757 && h != NULL
4758 && (h->root.type == bfd_link_hash_defweak
4759 || !h->def_regular)))
4760 {
4761 struct ppc_dyn_relocs *p;
4762 struct ppc_dyn_relocs **head;
4763
4764 /* We must copy these reloc types into the output file.
4765 Create a reloc section in dynobj and make room for
4766 this reloc. */
4767 if (sreloc == NULL)
4768 {
4769 const char *name;
4770 bfd *dynobj;
4771
4772 name = (bfd_elf_string_from_elf_section
4773 (abfd,
4774 elf_elfheader (abfd)->e_shstrndx,
4775 elf_section_data (sec)->rel_hdr.sh_name));
4776 if (name == NULL)
4777 return FALSE;
4778
4779 if (! CONST_STRNEQ (name, ".rela")
4780 || strcmp (bfd_get_section_name (abfd, sec),
4781 name + 5) != 0)
4782 {
4783 (*_bfd_error_handler)
4784 (_("%B: bad relocation section name `%s\'"),
4785 abfd, name);
4786 bfd_set_error (bfd_error_bad_value);
4787 }
4788
4789 dynobj = htab->elf.dynobj;
4790 sreloc = bfd_get_section_by_name (dynobj, name);
4791 if (sreloc == NULL)
4792 {
4793 flagword flags;
4794
4795 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4796 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4797 | SEC_ALLOC | SEC_LOAD);
4798 sreloc = bfd_make_section_with_flags (dynobj,
4799 name,
4800 flags);
4801 if (sreloc == NULL
4802 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4803 return FALSE;
4804 }
4805 elf_section_data (sec)->sreloc = sreloc;
4806 }
4807
4808 /* If this is a global symbol, we count the number of
4809 relocations we need for this symbol. */
4810 if (h != NULL)
4811 {
4812 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4813 }
4814 else
4815 {
4816 /* Track dynamic relocs needed for local syms too.
4817 We really need local syms available to do this
4818 easily. Oh well. */
4819
4820 asection *s;
4821 void *vpp;
4822
4823 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4824 sec, r_symndx);
4825 if (s == NULL)
4826 return FALSE;
4827
4828 vpp = &elf_section_data (s)->local_dynrel;
4829 head = (struct ppc_dyn_relocs **) vpp;
4830 }
4831
4832 p = *head;
4833 if (p == NULL || p->sec != sec)
4834 {
4835 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4836 if (p == NULL)
4837 return FALSE;
4838 p->next = *head;
4839 *head = p;
4840 p->sec = sec;
4841 p->count = 0;
4842 p->pc_count = 0;
4843 }
4844
4845 p->count += 1;
4846 if (!MUST_BE_DYN_RELOC (r_type))
4847 p->pc_count += 1;
4848 }
4849 break;
4850
4851 default:
4852 break;
4853 }
4854 }
4855
4856 return TRUE;
4857 }
4858
4859 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4860 of the code entry point, and its section. */
4861
4862 static bfd_vma
4863 opd_entry_value (asection *opd_sec,
4864 bfd_vma offset,
4865 asection **code_sec,
4866 bfd_vma *code_off)
4867 {
4868 bfd *opd_bfd = opd_sec->owner;
4869 Elf_Internal_Rela *relocs;
4870 Elf_Internal_Rela *lo, *hi, *look;
4871 bfd_vma val;
4872
4873 /* No relocs implies we are linking a --just-symbols object. */
4874 if (opd_sec->reloc_count == 0)
4875 {
4876 bfd_vma val;
4877
4878 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4879 return (bfd_vma) -1;
4880
4881 if (code_sec != NULL)
4882 {
4883 asection *sec, *likely = NULL;
4884 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4885 if (sec->vma <= val
4886 && (sec->flags & SEC_LOAD) != 0
4887 && (sec->flags & SEC_ALLOC) != 0)
4888 likely = sec;
4889 if (likely != NULL)
4890 {
4891 *code_sec = likely;
4892 if (code_off != NULL)
4893 *code_off = val - likely->vma;
4894 }
4895 }
4896 return val;
4897 }
4898
4899 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4900 if (relocs == NULL)
4901 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4902
4903 /* Go find the opd reloc at the sym address. */
4904 lo = relocs;
4905 BFD_ASSERT (lo != NULL);
4906 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4907 val = (bfd_vma) -1;
4908 while (lo < hi)
4909 {
4910 look = lo + (hi - lo) / 2;
4911 if (look->r_offset < offset)
4912 lo = look + 1;
4913 else if (look->r_offset > offset)
4914 hi = look;
4915 else
4916 {
4917 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4918 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4919 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4920 {
4921 unsigned long symndx = ELF64_R_SYM (look->r_info);
4922 asection *sec;
4923
4924 if (symndx < symtab_hdr->sh_info)
4925 {
4926 Elf_Internal_Sym *sym;
4927
4928 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4929 if (sym == NULL)
4930 {
4931 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4932 symtab_hdr->sh_info,
4933 0, NULL, NULL, NULL);
4934 if (sym == NULL)
4935 break;
4936 symtab_hdr->contents = (bfd_byte *) sym;
4937 }
4938
4939 sym += symndx;
4940 val = sym->st_value;
4941 sec = NULL;
4942 if ((sym->st_shndx != SHN_UNDEF
4943 && sym->st_shndx < SHN_LORESERVE)
4944 || sym->st_shndx > SHN_HIRESERVE)
4945 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4946 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4947 }
4948 else
4949 {
4950 struct elf_link_hash_entry **sym_hashes;
4951 struct elf_link_hash_entry *rh;
4952
4953 sym_hashes = elf_sym_hashes (opd_bfd);
4954 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4955 while (rh->root.type == bfd_link_hash_indirect
4956 || rh->root.type == bfd_link_hash_warning)
4957 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4958 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4959 || rh->root.type == bfd_link_hash_defweak);
4960 val = rh->root.u.def.value;
4961 sec = rh->root.u.def.section;
4962 }
4963 val += look->r_addend;
4964 if (code_off != NULL)
4965 *code_off = val;
4966 if (code_sec != NULL)
4967 *code_sec = sec;
4968 if (sec != NULL && sec->output_section != NULL)
4969 val += sec->output_section->vma + sec->output_offset;
4970 }
4971 break;
4972 }
4973 }
4974
4975 return val;
4976 }
4977
4978 /* Mark sections containing dynamically referenced symbols. When
4979 building shared libraries, we must assume that any visible symbol is
4980 referenced. */
4981
4982 static bfd_boolean
4983 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
4984 {
4985 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4986 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
4987
4988 if (eh->elf.root.type == bfd_link_hash_warning)
4989 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4990
4991 /* Dynamic linking info is on the func descriptor sym. */
4992 if (eh->oh != NULL
4993 && eh->oh->is_func_descriptor
4994 && (eh->oh->elf.root.type == bfd_link_hash_defined
4995 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4996 eh = eh->oh;
4997
4998 if ((eh->elf.root.type == bfd_link_hash_defined
4999 || eh->elf.root.type == bfd_link_hash_defweak)
5000 && (eh->elf.ref_dynamic
5001 || (!info->executable
5002 && eh->elf.def_regular
5003 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5004 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5005 {
5006 asection *code_sec;
5007
5008 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5009
5010 /* Function descriptor syms cause the associated
5011 function code sym section to be marked. */
5012 if (eh->is_func_descriptor
5013 && (eh->oh->elf.root.type == bfd_link_hash_defined
5014 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5015 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5016 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5017 && opd_entry_value (eh->elf.root.u.def.section,
5018 eh->elf.root.u.def.value,
5019 &code_sec, NULL) != (bfd_vma) -1)
5020 code_sec->flags |= SEC_KEEP;
5021 }
5022
5023 return TRUE;
5024 }
5025
5026 /* Return the section that should be marked against GC for a given
5027 relocation. */
5028
5029 static asection *
5030 ppc64_elf_gc_mark_hook (asection *sec,
5031 struct bfd_link_info *info,
5032 Elf_Internal_Rela *rel,
5033 struct elf_link_hash_entry *h,
5034 Elf_Internal_Sym *sym)
5035 {
5036 asection *rsec;
5037
5038 /* First mark all our entry sym sections. */
5039 if (info->gc_sym_list != NULL)
5040 {
5041 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5042 struct bfd_sym_chain *sym = info->gc_sym_list;
5043
5044 info->gc_sym_list = NULL;
5045 for (; sym != NULL; sym = sym->next)
5046 {
5047 struct ppc_link_hash_entry *eh;
5048
5049 eh = (struct ppc_link_hash_entry *)
5050 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5051 if (eh == NULL)
5052 continue;
5053 if (eh->elf.root.type != bfd_link_hash_defined
5054 && eh->elf.root.type != bfd_link_hash_defweak)
5055 continue;
5056
5057 if (eh->is_func_descriptor
5058 && (eh->oh->elf.root.type == bfd_link_hash_defined
5059 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5060 rsec = eh->oh->elf.root.u.def.section;
5061 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5062 && opd_entry_value (eh->elf.root.u.def.section,
5063 eh->elf.root.u.def.value,
5064 &rsec, NULL) != (bfd_vma) -1)
5065 ;
5066 else
5067 continue;
5068
5069 if (!rsec->gc_mark)
5070 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5071
5072 rsec = eh->elf.root.u.def.section;
5073 if (!rsec->gc_mark)
5074 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5075 }
5076 }
5077
5078 /* Syms return NULL if we're marking .opd, so we avoid marking all
5079 function sections, as all functions are referenced in .opd. */
5080 rsec = NULL;
5081 if (get_opd_info (sec) != NULL)
5082 return rsec;
5083
5084 if (h != NULL)
5085 {
5086 enum elf_ppc64_reloc_type r_type;
5087 struct ppc_link_hash_entry *eh;
5088
5089 r_type = ELF64_R_TYPE (rel->r_info);
5090 switch (r_type)
5091 {
5092 case R_PPC64_GNU_VTINHERIT:
5093 case R_PPC64_GNU_VTENTRY:
5094 break;
5095
5096 default:
5097 switch (h->root.type)
5098 {
5099 case bfd_link_hash_defined:
5100 case bfd_link_hash_defweak:
5101 eh = (struct ppc_link_hash_entry *) h;
5102 if (eh->oh != NULL
5103 && eh->oh->is_func_descriptor
5104 && (eh->oh->elf.root.type == bfd_link_hash_defined
5105 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5106 eh = eh->oh;
5107
5108 /* Function descriptor syms cause the associated
5109 function code sym section to be marked. */
5110 if (eh->is_func_descriptor
5111 && (eh->oh->elf.root.type == bfd_link_hash_defined
5112 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5113 {
5114 /* They also mark their opd section. */
5115 if (!eh->elf.root.u.def.section->gc_mark)
5116 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5117 ppc64_elf_gc_mark_hook);
5118
5119 rsec = eh->oh->elf.root.u.def.section;
5120 }
5121 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5122 && opd_entry_value (eh->elf.root.u.def.section,
5123 eh->elf.root.u.def.value,
5124 &rsec, NULL) != (bfd_vma) -1)
5125 {
5126 if (!eh->elf.root.u.def.section->gc_mark)
5127 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5128 ppc64_elf_gc_mark_hook);
5129 }
5130 else
5131 rsec = h->root.u.def.section;
5132 break;
5133
5134 case bfd_link_hash_common:
5135 rsec = h->root.u.c.p->section;
5136 break;
5137
5138 default:
5139 break;
5140 }
5141 }
5142 }
5143 else
5144 {
5145 asection **opd_sym_section;
5146
5147 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5148 opd_sym_section = get_opd_info (rsec);
5149 if (opd_sym_section != NULL)
5150 {
5151 if (!rsec->gc_mark)
5152 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5153
5154 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5155 }
5156 }
5157
5158 return rsec;
5159 }
5160
5161 /* Update the .got, .plt. and dynamic reloc reference counts for the
5162 section being removed. */
5163
5164 static bfd_boolean
5165 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5166 asection *sec, const Elf_Internal_Rela *relocs)
5167 {
5168 struct ppc_link_hash_table *htab;
5169 Elf_Internal_Shdr *symtab_hdr;
5170 struct elf_link_hash_entry **sym_hashes;
5171 struct got_entry **local_got_ents;
5172 const Elf_Internal_Rela *rel, *relend;
5173
5174 if ((sec->flags & SEC_ALLOC) == 0)
5175 return TRUE;
5176
5177 elf_section_data (sec)->local_dynrel = NULL;
5178
5179 htab = ppc_hash_table (info);
5180 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5181 sym_hashes = elf_sym_hashes (abfd);
5182 local_got_ents = elf_local_got_ents (abfd);
5183
5184 relend = relocs + sec->reloc_count;
5185 for (rel = relocs; rel < relend; rel++)
5186 {
5187 unsigned long r_symndx;
5188 enum elf_ppc64_reloc_type r_type;
5189 struct elf_link_hash_entry *h = NULL;
5190 char tls_type = 0;
5191
5192 r_symndx = ELF64_R_SYM (rel->r_info);
5193 r_type = ELF64_R_TYPE (rel->r_info);
5194 if (r_symndx >= symtab_hdr->sh_info)
5195 {
5196 struct ppc_link_hash_entry *eh;
5197 struct ppc_dyn_relocs **pp;
5198 struct ppc_dyn_relocs *p;
5199
5200 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5201 while (h->root.type == bfd_link_hash_indirect
5202 || h->root.type == bfd_link_hash_warning)
5203 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5204 eh = (struct ppc_link_hash_entry *) h;
5205
5206 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5207 if (p->sec == sec)
5208 {
5209 /* Everything must go for SEC. */
5210 *pp = p->next;
5211 break;
5212 }
5213 }
5214
5215 switch (r_type)
5216 {
5217 case R_PPC64_GOT_TLSLD16:
5218 case R_PPC64_GOT_TLSLD16_LO:
5219 case R_PPC64_GOT_TLSLD16_HI:
5220 case R_PPC64_GOT_TLSLD16_HA:
5221 ppc64_tlsld_got (abfd)->refcount -= 1;
5222 tls_type = TLS_TLS | TLS_LD;
5223 goto dogot;
5224
5225 case R_PPC64_GOT_TLSGD16:
5226 case R_PPC64_GOT_TLSGD16_LO:
5227 case R_PPC64_GOT_TLSGD16_HI:
5228 case R_PPC64_GOT_TLSGD16_HA:
5229 tls_type = TLS_TLS | TLS_GD;
5230 goto dogot;
5231
5232 case R_PPC64_GOT_TPREL16_DS:
5233 case R_PPC64_GOT_TPREL16_LO_DS:
5234 case R_PPC64_GOT_TPREL16_HI:
5235 case R_PPC64_GOT_TPREL16_HA:
5236 tls_type = TLS_TLS | TLS_TPREL;
5237 goto dogot;
5238
5239 case R_PPC64_GOT_DTPREL16_DS:
5240 case R_PPC64_GOT_DTPREL16_LO_DS:
5241 case R_PPC64_GOT_DTPREL16_HI:
5242 case R_PPC64_GOT_DTPREL16_HA:
5243 tls_type = TLS_TLS | TLS_DTPREL;
5244 goto dogot;
5245
5246 case R_PPC64_GOT16:
5247 case R_PPC64_GOT16_DS:
5248 case R_PPC64_GOT16_HA:
5249 case R_PPC64_GOT16_HI:
5250 case R_PPC64_GOT16_LO:
5251 case R_PPC64_GOT16_LO_DS:
5252 dogot:
5253 {
5254 struct got_entry *ent;
5255
5256 if (h != NULL)
5257 ent = h->got.glist;
5258 else
5259 ent = local_got_ents[r_symndx];
5260
5261 for (; ent != NULL; ent = ent->next)
5262 if (ent->addend == rel->r_addend
5263 && ent->owner == abfd
5264 && ent->tls_type == tls_type)
5265 break;
5266 if (ent == NULL)
5267 abort ();
5268 if (ent->got.refcount > 0)
5269 ent->got.refcount -= 1;
5270 }
5271 break;
5272
5273 case R_PPC64_PLT16_HA:
5274 case R_PPC64_PLT16_HI:
5275 case R_PPC64_PLT16_LO:
5276 case R_PPC64_PLT32:
5277 case R_PPC64_PLT64:
5278 case R_PPC64_REL14:
5279 case R_PPC64_REL14_BRNTAKEN:
5280 case R_PPC64_REL14_BRTAKEN:
5281 case R_PPC64_REL24:
5282 if (h != NULL)
5283 {
5284 struct plt_entry *ent;
5285
5286 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5287 if (ent->addend == rel->r_addend)
5288 break;
5289 if (ent == NULL)
5290 abort ();
5291 if (ent->plt.refcount > 0)
5292 ent->plt.refcount -= 1;
5293 }
5294 break;
5295
5296 default:
5297 break;
5298 }
5299 }
5300 return TRUE;
5301 }
5302
5303 /* The maximum size of .sfpr. */
5304 #define SFPR_MAX (218*4)
5305
5306 struct sfpr_def_parms
5307 {
5308 const char name[12];
5309 unsigned char lo, hi;
5310 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5311 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5312 };
5313
5314 /* Auto-generate _save*, _rest* functions in .sfpr. */
5315
5316 static unsigned int
5317 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5318 {
5319 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5320 unsigned int i;
5321 size_t len = strlen (parm->name);
5322 bfd_boolean writing = FALSE;
5323 char sym[16];
5324
5325 memcpy (sym, parm->name, len);
5326 sym[len + 2] = 0;
5327
5328 for (i = parm->lo; i <= parm->hi; i++)
5329 {
5330 struct elf_link_hash_entry *h;
5331
5332 sym[len + 0] = i / 10 + '0';
5333 sym[len + 1] = i % 10 + '0';
5334 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5335 if (h != NULL
5336 && !h->def_regular)
5337 {
5338 h->root.type = bfd_link_hash_defined;
5339 h->root.u.def.section = htab->sfpr;
5340 h->root.u.def.value = htab->sfpr->size;
5341 h->type = STT_FUNC;
5342 h->def_regular = 1;
5343 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5344 writing = TRUE;
5345 if (htab->sfpr->contents == NULL)
5346 {
5347 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5348 if (htab->sfpr->contents == NULL)
5349 return FALSE;
5350 }
5351 }
5352 if (writing)
5353 {
5354 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5355 if (i != parm->hi)
5356 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5357 else
5358 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5359 htab->sfpr->size = p - htab->sfpr->contents;
5360 }
5361 }
5362
5363 return TRUE;
5364 }
5365
5366 static bfd_byte *
5367 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5368 {
5369 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5370 return p + 4;
5371 }
5372
5373 static bfd_byte *
5374 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5375 {
5376 p = savegpr0 (abfd, p, r);
5377 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5378 p = p + 4;
5379 bfd_put_32 (abfd, BLR, p);
5380 return p + 4;
5381 }
5382
5383 static bfd_byte *
5384 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5385 {
5386 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5387 return p + 4;
5388 }
5389
5390 static bfd_byte *
5391 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5392 {
5393 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5394 p = p + 4;
5395 p = restgpr0 (abfd, p, r);
5396 bfd_put_32 (abfd, MTLR_R0, p);
5397 p = p + 4;
5398 if (r == 29)
5399 {
5400 p = restgpr0 (abfd, p, 30);
5401 p = restgpr0 (abfd, p, 31);
5402 }
5403 bfd_put_32 (abfd, BLR, p);
5404 return p + 4;
5405 }
5406
5407 static bfd_byte *
5408 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5409 {
5410 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5411 return p + 4;
5412 }
5413
5414 static bfd_byte *
5415 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5416 {
5417 p = savegpr1 (abfd, p, r);
5418 bfd_put_32 (abfd, BLR, p);
5419 return p + 4;
5420 }
5421
5422 static bfd_byte *
5423 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5424 {
5425 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5426 return p + 4;
5427 }
5428
5429 static bfd_byte *
5430 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5431 {
5432 p = restgpr1 (abfd, p, r);
5433 bfd_put_32 (abfd, BLR, p);
5434 return p + 4;
5435 }
5436
5437 static bfd_byte *
5438 savefpr (bfd *abfd, bfd_byte *p, int r)
5439 {
5440 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5441 return p + 4;
5442 }
5443
5444 static bfd_byte *
5445 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5446 {
5447 p = savefpr (abfd, p, r);
5448 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5449 p = p + 4;
5450 bfd_put_32 (abfd, BLR, p);
5451 return p + 4;
5452 }
5453
5454 static bfd_byte *
5455 restfpr (bfd *abfd, bfd_byte *p, int r)
5456 {
5457 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5458 return p + 4;
5459 }
5460
5461 static bfd_byte *
5462 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5463 {
5464 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5465 p = p + 4;
5466 p = restfpr (abfd, p, r);
5467 bfd_put_32 (abfd, MTLR_R0, p);
5468 p = p + 4;
5469 if (r == 29)
5470 {
5471 p = restfpr (abfd, p, 30);
5472 p = restfpr (abfd, p, 31);
5473 }
5474 bfd_put_32 (abfd, BLR, p);
5475 return p + 4;
5476 }
5477
5478 static bfd_byte *
5479 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5480 {
5481 p = savefpr (abfd, p, r);
5482 bfd_put_32 (abfd, BLR, p);
5483 return p + 4;
5484 }
5485
5486 static bfd_byte *
5487 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5488 {
5489 p = restfpr (abfd, p, r);
5490 bfd_put_32 (abfd, BLR, p);
5491 return p + 4;
5492 }
5493
5494 static bfd_byte *
5495 savevr (bfd *abfd, bfd_byte *p, int r)
5496 {
5497 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5498 p = p + 4;
5499 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5500 return p + 4;
5501 }
5502
5503 static bfd_byte *
5504 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5505 {
5506 p = savevr (abfd, p, r);
5507 bfd_put_32 (abfd, BLR, p);
5508 return p + 4;
5509 }
5510
5511 static bfd_byte *
5512 restvr (bfd *abfd, bfd_byte *p, int r)
5513 {
5514 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5515 p = p + 4;
5516 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5517 return p + 4;
5518 }
5519
5520 static bfd_byte *
5521 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5522 {
5523 p = restvr (abfd, p, r);
5524 bfd_put_32 (abfd, BLR, p);
5525 return p + 4;
5526 }
5527
5528 /* Called via elf_link_hash_traverse to transfer dynamic linking
5529 information on function code symbol entries to their corresponding
5530 function descriptor symbol entries. */
5531
5532 static bfd_boolean
5533 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5534 {
5535 struct bfd_link_info *info;
5536 struct ppc_link_hash_table *htab;
5537 struct plt_entry *ent;
5538 struct ppc_link_hash_entry *fh;
5539 struct ppc_link_hash_entry *fdh;
5540 bfd_boolean force_local;
5541
5542 fh = (struct ppc_link_hash_entry *) h;
5543 if (fh->elf.root.type == bfd_link_hash_indirect)
5544 return TRUE;
5545
5546 if (fh->elf.root.type == bfd_link_hash_warning)
5547 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5548
5549 info = inf;
5550 htab = ppc_hash_table (info);
5551
5552 /* Resolve undefined references to dot-symbols as the value
5553 in the function descriptor, if we have one in a regular object.
5554 This is to satisfy cases like ".quad .foo". Calls to functions
5555 in dynamic objects are handled elsewhere. */
5556 if (fh->elf.root.type == bfd_link_hash_undefweak
5557 && fh->was_undefined
5558 && (fh->oh->elf.root.type == bfd_link_hash_defined
5559 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5560 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5561 && opd_entry_value (fh->oh->elf.root.u.def.section,
5562 fh->oh->elf.root.u.def.value,
5563 &fh->elf.root.u.def.section,
5564 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5565 {
5566 fh->elf.root.type = fh->oh->elf.root.type;
5567 fh->elf.forced_local = 1;
5568 }
5569
5570 /* If this is a function code symbol, transfer dynamic linking
5571 information to the function descriptor symbol. */
5572 if (!fh->is_func)
5573 return TRUE;
5574
5575 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5576 if (ent->plt.refcount > 0)
5577 break;
5578 if (ent == NULL
5579 || fh->elf.root.root.string[0] != '.'
5580 || fh->elf.root.root.string[1] == '\0')
5581 return TRUE;
5582
5583 /* Find the corresponding function descriptor symbol. Create it
5584 as undefined if necessary. */
5585
5586 fdh = get_fdh (fh, htab);
5587 if (fdh != NULL)
5588 while (fdh->elf.root.type == bfd_link_hash_indirect
5589 || fdh->elf.root.type == bfd_link_hash_warning)
5590 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5591
5592 if (fdh == NULL
5593 && info->shared
5594 && (fh->elf.root.type == bfd_link_hash_undefined
5595 || fh->elf.root.type == bfd_link_hash_undefweak))
5596 {
5597 fdh = make_fdh (info, fh);
5598 if (fdh == NULL)
5599 return FALSE;
5600 }
5601
5602 /* Fake function descriptors are made undefweak. If the function
5603 code symbol is strong undefined, make the fake sym the same.
5604 If the function code symbol is defined, then force the fake
5605 descriptor local; We can't support overriding of symbols in a
5606 shared library on a fake descriptor. */
5607
5608 if (fdh != NULL
5609 && fdh->fake
5610 && fdh->elf.root.type == bfd_link_hash_undefweak)
5611 {
5612 if (fh->elf.root.type == bfd_link_hash_undefined)
5613 {
5614 fdh->elf.root.type = bfd_link_hash_undefined;
5615 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5616 }
5617 else if (fh->elf.root.type == bfd_link_hash_defined
5618 || fh->elf.root.type == bfd_link_hash_defweak)
5619 {
5620 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5621 }
5622 }
5623
5624 if (fdh != NULL
5625 && !fdh->elf.forced_local
5626 && (info->shared
5627 || fdh->elf.def_dynamic
5628 || fdh->elf.ref_dynamic
5629 || (fdh->elf.root.type == bfd_link_hash_undefweak
5630 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5631 {
5632 if (fdh->elf.dynindx == -1)
5633 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5634 return FALSE;
5635 fdh->elf.ref_regular |= fh->elf.ref_regular;
5636 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5637 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5638 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5639 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5640 {
5641 move_plt_plist (fh, fdh);
5642 fdh->elf.needs_plt = 1;
5643 }
5644 fdh->is_func_descriptor = 1;
5645 fdh->oh = fh;
5646 fh->oh = fdh;
5647 }
5648
5649 /* Now that the info is on the function descriptor, clear the
5650 function code sym info. Any function code syms for which we
5651 don't have a definition in a regular file, we force local.
5652 This prevents a shared library from exporting syms that have
5653 been imported from another library. Function code syms that
5654 are really in the library we must leave global to prevent the
5655 linker dragging in a definition from a static library. */
5656 force_local = (!fh->elf.def_regular
5657 || fdh == NULL
5658 || !fdh->elf.def_regular
5659 || fdh->elf.forced_local);
5660 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5661
5662 return TRUE;
5663 }
5664
5665 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5666 this hook to a) provide some gcc support functions, and b) transfer
5667 dynamic linking information gathered so far on function code symbol
5668 entries, to their corresponding function descriptor symbol entries. */
5669
5670 static bfd_boolean
5671 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5672 struct bfd_link_info *info)
5673 {
5674 struct ppc_link_hash_table *htab;
5675 unsigned int i;
5676 const struct sfpr_def_parms funcs[] =
5677 {
5678 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5679 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5680 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5681 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5682 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5683 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5684 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5685 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5686 { "._savef", 14, 31, savefpr, savefpr1_tail },
5687 { "._restf", 14, 31, restfpr, restfpr1_tail },
5688 { "_savevr_", 20, 31, savevr, savevr_tail },
5689 { "_restvr_", 20, 31, restvr, restvr_tail }
5690 };
5691
5692 htab = ppc_hash_table (info);
5693 if (htab->sfpr == NULL)
5694 /* We don't have any relocs. */
5695 return TRUE;
5696
5697 /* Provide any missing _save* and _rest* functions. */
5698 htab->sfpr->size = 0;
5699 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5700 if (!sfpr_define (info, &funcs[i]))
5701 return FALSE;
5702
5703 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5704
5705 if (htab->sfpr->size == 0)
5706 htab->sfpr->flags |= SEC_EXCLUDE;
5707
5708 return TRUE;
5709 }
5710
5711 /* Adjust a symbol defined by a dynamic object and referenced by a
5712 regular object. The current definition is in some section of the
5713 dynamic object, but we're not including those sections. We have to
5714 change the definition to something the rest of the link can
5715 understand. */
5716
5717 static bfd_boolean
5718 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5719 struct elf_link_hash_entry *h)
5720 {
5721 struct ppc_link_hash_table *htab;
5722 asection *s;
5723 unsigned int power_of_two;
5724
5725 htab = ppc_hash_table (info);
5726
5727 /* Deal with function syms. */
5728 if (h->type == STT_FUNC
5729 || h->needs_plt)
5730 {
5731 /* Clear procedure linkage table information for any symbol that
5732 won't need a .plt entry. */
5733 struct plt_entry *ent;
5734 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5735 if (ent->plt.refcount > 0)
5736 break;
5737 if (ent == NULL
5738 || SYMBOL_CALLS_LOCAL (info, h)
5739 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5740 && h->root.type == bfd_link_hash_undefweak))
5741 {
5742 h->plt.plist = NULL;
5743 h->needs_plt = 0;
5744 }
5745 }
5746 else
5747 h->plt.plist = NULL;
5748
5749 /* If this is a weak symbol, and there is a real definition, the
5750 processor independent code will have arranged for us to see the
5751 real definition first, and we can just use the same value. */
5752 if (h->u.weakdef != NULL)
5753 {
5754 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5755 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5756 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5757 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5758 if (ELIMINATE_COPY_RELOCS)
5759 h->non_got_ref = h->u.weakdef->non_got_ref;
5760 return TRUE;
5761 }
5762
5763 /* If we are creating a shared library, we must presume that the
5764 only references to the symbol are via the global offset table.
5765 For such cases we need not do anything here; the relocations will
5766 be handled correctly by relocate_section. */
5767 if (info->shared)
5768 return TRUE;
5769
5770 /* If there are no references to this symbol that do not use the
5771 GOT, we don't need to generate a copy reloc. */
5772 if (!h->non_got_ref)
5773 return TRUE;
5774
5775 if (ELIMINATE_COPY_RELOCS)
5776 {
5777 struct ppc_link_hash_entry * eh;
5778 struct ppc_dyn_relocs *p;
5779
5780 eh = (struct ppc_link_hash_entry *) h;
5781 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5782 {
5783 s = p->sec->output_section;
5784 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5785 break;
5786 }
5787
5788 /* If we didn't find any dynamic relocs in read-only sections, then
5789 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5790 if (p == NULL)
5791 {
5792 h->non_got_ref = 0;
5793 return TRUE;
5794 }
5795 }
5796
5797 if (h->plt.plist != NULL)
5798 {
5799 /* We should never get here, but unfortunately there are versions
5800 of gcc out there that improperly (for this ABI) put initialized
5801 function pointers, vtable refs and suchlike in read-only
5802 sections. Allow them to proceed, but warn that this might
5803 break at runtime. */
5804 (*_bfd_error_handler)
5805 (_("copy reloc against `%s' requires lazy plt linking; "
5806 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5807 h->root.root.string);
5808 }
5809
5810 /* This is a reference to a symbol defined by a dynamic object which
5811 is not a function. */
5812
5813 if (h->size == 0)
5814 {
5815 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5816 h->root.root.string);
5817 return TRUE;
5818 }
5819
5820 /* We must allocate the symbol in our .dynbss section, which will
5821 become part of the .bss section of the executable. There will be
5822 an entry for this symbol in the .dynsym section. The dynamic
5823 object will contain position independent code, so all references
5824 from the dynamic object to this symbol will go through the global
5825 offset table. The dynamic linker will use the .dynsym entry to
5826 determine the address it must put in the global offset table, so
5827 both the dynamic object and the regular object will refer to the
5828 same memory location for the variable. */
5829
5830 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5831 to copy the initial value out of the dynamic object and into the
5832 runtime process image. We need to remember the offset into the
5833 .rela.bss section we are going to use. */
5834 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5835 {
5836 htab->relbss->size += sizeof (Elf64_External_Rela);
5837 h->needs_copy = 1;
5838 }
5839
5840 /* We need to figure out the alignment required for this symbol. I
5841 have no idea how ELF linkers handle this. */
5842 power_of_two = bfd_log2 (h->size);
5843 if (power_of_two > 4)
5844 power_of_two = 4;
5845
5846 /* Apply the required alignment. */
5847 s = htab->dynbss;
5848 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5849 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5850 {
5851 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5852 return FALSE;
5853 }
5854
5855 /* Define the symbol as being at this point in the section. */
5856 h->root.u.def.section = s;
5857 h->root.u.def.value = s->size;
5858
5859 /* Increment the section size to make room for the symbol. */
5860 s->size += h->size;
5861
5862 return TRUE;
5863 }
5864
5865 /* If given a function descriptor symbol, hide both the function code
5866 sym and the descriptor. */
5867 static void
5868 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5869 struct elf_link_hash_entry *h,
5870 bfd_boolean force_local)
5871 {
5872 struct ppc_link_hash_entry *eh;
5873 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5874
5875 eh = (struct ppc_link_hash_entry *) h;
5876 if (eh->is_func_descriptor)
5877 {
5878 struct ppc_link_hash_entry *fh = eh->oh;
5879
5880 if (fh == NULL)
5881 {
5882 const char *p, *q;
5883 struct ppc_link_hash_table *htab;
5884 char save;
5885
5886 /* We aren't supposed to use alloca in BFD because on
5887 systems which do not have alloca the version in libiberty
5888 calls xmalloc, which might cause the program to crash
5889 when it runs out of memory. This function doesn't have a
5890 return status, so there's no way to gracefully return an
5891 error. So cheat. We know that string[-1] can be safely
5892 accessed; It's either a string in an ELF string table,
5893 or allocated in an objalloc structure. */
5894
5895 p = eh->elf.root.root.string - 1;
5896 save = *p;
5897 *(char *) p = '.';
5898 htab = ppc_hash_table (info);
5899 fh = (struct ppc_link_hash_entry *)
5900 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5901 *(char *) p = save;
5902
5903 /* Unfortunately, if it so happens that the string we were
5904 looking for was allocated immediately before this string,
5905 then we overwrote the string terminator. That's the only
5906 reason the lookup should fail. */
5907 if (fh == NULL)
5908 {
5909 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5910 while (q >= eh->elf.root.root.string && *q == *p)
5911 --q, --p;
5912 if (q < eh->elf.root.root.string && *p == '.')
5913 fh = (struct ppc_link_hash_entry *)
5914 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5915 }
5916 if (fh != NULL)
5917 {
5918 eh->oh = fh;
5919 fh->oh = eh;
5920 }
5921 }
5922 if (fh != NULL)
5923 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5924 }
5925 }
5926
5927 static bfd_boolean
5928 get_sym_h (struct elf_link_hash_entry **hp,
5929 Elf_Internal_Sym **symp,
5930 asection **symsecp,
5931 char **tls_maskp,
5932 Elf_Internal_Sym **locsymsp,
5933 unsigned long r_symndx,
5934 bfd *ibfd)
5935 {
5936 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5937
5938 if (r_symndx >= symtab_hdr->sh_info)
5939 {
5940 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5941 struct elf_link_hash_entry *h;
5942
5943 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5944 while (h->root.type == bfd_link_hash_indirect
5945 || h->root.type == bfd_link_hash_warning)
5946 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5947
5948 if (hp != NULL)
5949 *hp = h;
5950
5951 if (symp != NULL)
5952 *symp = NULL;
5953
5954 if (symsecp != NULL)
5955 {
5956 asection *symsec = NULL;
5957 if (h->root.type == bfd_link_hash_defined
5958 || h->root.type == bfd_link_hash_defweak)
5959 symsec = h->root.u.def.section;
5960 *symsecp = symsec;
5961 }
5962
5963 if (tls_maskp != NULL)
5964 {
5965 struct ppc_link_hash_entry *eh;
5966
5967 eh = (struct ppc_link_hash_entry *) h;
5968 *tls_maskp = &eh->tls_mask;
5969 }
5970 }
5971 else
5972 {
5973 Elf_Internal_Sym *sym;
5974 Elf_Internal_Sym *locsyms = *locsymsp;
5975
5976 if (locsyms == NULL)
5977 {
5978 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5979 if (locsyms == NULL)
5980 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5981 symtab_hdr->sh_info,
5982 0, NULL, NULL, NULL);
5983 if (locsyms == NULL)
5984 return FALSE;
5985 *locsymsp = locsyms;
5986 }
5987 sym = locsyms + r_symndx;
5988
5989 if (hp != NULL)
5990 *hp = NULL;
5991
5992 if (symp != NULL)
5993 *symp = sym;
5994
5995 if (symsecp != NULL)
5996 {
5997 asection *symsec = NULL;
5998 if ((sym->st_shndx != SHN_UNDEF
5999 && sym->st_shndx < SHN_LORESERVE)
6000 || sym->st_shndx > SHN_HIRESERVE)
6001 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6002 *symsecp = symsec;
6003 }
6004
6005 if (tls_maskp != NULL)
6006 {
6007 struct got_entry **lgot_ents;
6008 char *tls_mask;
6009
6010 tls_mask = NULL;
6011 lgot_ents = elf_local_got_ents (ibfd);
6012 if (lgot_ents != NULL)
6013 {
6014 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6015 tls_mask = &lgot_masks[r_symndx];
6016 }
6017 *tls_maskp = tls_mask;
6018 }
6019 }
6020 return TRUE;
6021 }
6022
6023 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6024 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6025 type suitable for optimization, and 1 otherwise. */
6026
6027 static int
6028 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6029 Elf_Internal_Sym **locsymsp,
6030 const Elf_Internal_Rela *rel, bfd *ibfd)
6031 {
6032 unsigned long r_symndx;
6033 int next_r;
6034 struct elf_link_hash_entry *h;
6035 Elf_Internal_Sym *sym;
6036 asection *sec;
6037 bfd_vma off;
6038
6039 r_symndx = ELF64_R_SYM (rel->r_info);
6040 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6041 return 0;
6042
6043 if ((*tls_maskp != NULL && **tls_maskp != 0)
6044 || sec == NULL
6045 || ppc64_elf_section_data (sec)->t_symndx == NULL)
6046 return 1;
6047
6048 /* Look inside a TOC section too. */
6049 if (h != NULL)
6050 {
6051 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6052 off = h->root.u.def.value;
6053 }
6054 else
6055 off = sym->st_value;
6056 off += rel->r_addend;
6057 BFD_ASSERT (off % 8 == 0);
6058 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
6059 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
6060 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6061 return 0;
6062 if (toc_symndx != NULL)
6063 *toc_symndx = r_symndx;
6064 if ((h == NULL
6065 || ((h->root.type == bfd_link_hash_defined
6066 || h->root.type == bfd_link_hash_defweak)
6067 && !h->def_dynamic))
6068 && (next_r == -1 || next_r == -2))
6069 return 1 - next_r;
6070 return 1;
6071 }
6072
6073 /* Adjust all global syms defined in opd sections. In gcc generated
6074 code for the old ABI, these will already have been done. */
6075
6076 static bfd_boolean
6077 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6078 {
6079 struct ppc_link_hash_entry *eh;
6080 asection *sym_sec;
6081 long *opd_adjust;
6082
6083 if (h->root.type == bfd_link_hash_indirect)
6084 return TRUE;
6085
6086 if (h->root.type == bfd_link_hash_warning)
6087 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6088
6089 if (h->root.type != bfd_link_hash_defined
6090 && h->root.type != bfd_link_hash_defweak)
6091 return TRUE;
6092
6093 eh = (struct ppc_link_hash_entry *) h;
6094 if (eh->adjust_done)
6095 return TRUE;
6096
6097 sym_sec = eh->elf.root.u.def.section;
6098 opd_adjust = get_opd_info (sym_sec);
6099 if (opd_adjust != NULL)
6100 {
6101 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6102 if (adjust == -1)
6103 {
6104 /* This entry has been deleted. */
6105 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->u.deleted_section;
6106 if (dsec == NULL)
6107 {
6108 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6109 if (elf_discarded_section (dsec))
6110 {
6111 ppc64_elf_tdata (sym_sec->owner)->u.deleted_section = dsec;
6112 break;
6113 }
6114 }
6115 eh->elf.root.u.def.value = 0;
6116 eh->elf.root.u.def.section = dsec;
6117 }
6118 else
6119 eh->elf.root.u.def.value += adjust;
6120 eh->adjust_done = 1;
6121 }
6122 return TRUE;
6123 }
6124
6125 /* Handles decrementing dynamic reloc counts for the reloc specified by
6126 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6127 have already been determined. */
6128
6129 static bfd_boolean
6130 dec_dynrel_count (bfd_vma r_info,
6131 asection *sec,
6132 struct bfd_link_info *info,
6133 Elf_Internal_Sym **local_syms,
6134 struct elf_link_hash_entry *h,
6135 asection *sym_sec)
6136 {
6137 enum elf_ppc64_reloc_type r_type;
6138 struct ppc_dyn_relocs *p;
6139 struct ppc_dyn_relocs **pp;
6140
6141 /* Can this reloc be dynamic? This switch, and later tests here
6142 should be kept in sync with the code in check_relocs. */
6143 r_type = ELF64_R_TYPE (r_info);
6144 switch (r_type)
6145 {
6146 default:
6147 return TRUE;
6148
6149 case R_PPC64_TPREL16:
6150 case R_PPC64_TPREL16_LO:
6151 case R_PPC64_TPREL16_HI:
6152 case R_PPC64_TPREL16_HA:
6153 case R_PPC64_TPREL16_DS:
6154 case R_PPC64_TPREL16_LO_DS:
6155 case R_PPC64_TPREL16_HIGHER:
6156 case R_PPC64_TPREL16_HIGHERA:
6157 case R_PPC64_TPREL16_HIGHEST:
6158 case R_PPC64_TPREL16_HIGHESTA:
6159 if (!info->shared)
6160 return TRUE;
6161
6162 case R_PPC64_TPREL64:
6163 case R_PPC64_DTPMOD64:
6164 case R_PPC64_DTPREL64:
6165 case R_PPC64_ADDR64:
6166 case R_PPC64_REL30:
6167 case R_PPC64_REL32:
6168 case R_PPC64_REL64:
6169 case R_PPC64_ADDR14:
6170 case R_PPC64_ADDR14_BRNTAKEN:
6171 case R_PPC64_ADDR14_BRTAKEN:
6172 case R_PPC64_ADDR16:
6173 case R_PPC64_ADDR16_DS:
6174 case R_PPC64_ADDR16_HA:
6175 case R_PPC64_ADDR16_HI:
6176 case R_PPC64_ADDR16_HIGHER:
6177 case R_PPC64_ADDR16_HIGHERA:
6178 case R_PPC64_ADDR16_HIGHEST:
6179 case R_PPC64_ADDR16_HIGHESTA:
6180 case R_PPC64_ADDR16_LO:
6181 case R_PPC64_ADDR16_LO_DS:
6182 case R_PPC64_ADDR24:
6183 case R_PPC64_ADDR32:
6184 case R_PPC64_UADDR16:
6185 case R_PPC64_UADDR32:
6186 case R_PPC64_UADDR64:
6187 case R_PPC64_TOC:
6188 break;
6189 }
6190
6191 if (local_syms != NULL)
6192 {
6193 unsigned long r_symndx;
6194 Elf_Internal_Sym *sym;
6195 bfd *ibfd = sec->owner;
6196
6197 r_symndx = ELF64_R_SYM (r_info);
6198 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6199 return FALSE;
6200 }
6201
6202 if ((info->shared
6203 && (MUST_BE_DYN_RELOC (r_type)
6204 || (h != NULL
6205 && (!info->symbolic
6206 || h->root.type == bfd_link_hash_defweak
6207 || !h->def_regular))))
6208 || (ELIMINATE_COPY_RELOCS
6209 && !info->shared
6210 && h != NULL
6211 && (h->root.type == bfd_link_hash_defweak
6212 || !h->def_regular)))
6213 ;
6214 else
6215 return TRUE;
6216
6217 if (h != NULL)
6218 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6219 else
6220 {
6221 if (sym_sec != NULL)
6222 {
6223 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6224 pp = (struct ppc_dyn_relocs **) vpp;
6225 }
6226 else
6227 {
6228 void *vpp = &elf_section_data (sec)->local_dynrel;
6229 pp = (struct ppc_dyn_relocs **) vpp;
6230 }
6231
6232 /* elf_gc_sweep may have already removed all dyn relocs associated
6233 with local syms for a given section. Don't report a dynreloc
6234 miscount. */
6235 if (*pp == NULL)
6236 return TRUE;
6237 }
6238
6239 while ((p = *pp) != NULL)
6240 {
6241 if (p->sec == sec)
6242 {
6243 if (!MUST_BE_DYN_RELOC (r_type))
6244 p->pc_count -= 1;
6245 p->count -= 1;
6246 if (p->count == 0)
6247 *pp = p->next;
6248 return TRUE;
6249 }
6250 pp = &p->next;
6251 }
6252
6253 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6254 sec->owner, sec);
6255 bfd_set_error (bfd_error_bad_value);
6256 return FALSE;
6257 }
6258
6259 /* Remove unused Official Procedure Descriptor entries. Currently we
6260 only remove those associated with functions in discarded link-once
6261 sections, or weakly defined functions that have been overridden. It
6262 would be possible to remove many more entries for statically linked
6263 applications. */
6264
6265 bfd_boolean
6266 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6267 bfd_boolean no_opd_opt,
6268 bfd_boolean non_overlapping)
6269 {
6270 bfd *ibfd;
6271 bfd_boolean some_edited = FALSE;
6272 asection *need_pad = NULL;
6273
6274 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6275 {
6276 asection *sec;
6277 Elf_Internal_Rela *relstart, *rel, *relend;
6278 Elf_Internal_Shdr *symtab_hdr;
6279 Elf_Internal_Sym *local_syms;
6280 struct elf_link_hash_entry **sym_hashes;
6281 bfd_vma offset;
6282 bfd_size_type amt;
6283 long *opd_adjust;
6284 bfd_boolean need_edit, add_aux_fields;
6285 bfd_size_type cnt_16b = 0;
6286
6287 sec = bfd_get_section_by_name (ibfd, ".opd");
6288 if (sec == NULL || sec->size == 0)
6289 continue;
6290
6291 amt = sec->size * sizeof (long) / 8;
6292 opd_adjust = get_opd_info (sec);
6293 if (opd_adjust == NULL)
6294 {
6295 /* check_relocs hasn't been called. Must be a ld -r link
6296 or --just-symbols object. */
6297 opd_adjust = bfd_alloc (obfd, amt);
6298 if (opd_adjust == NULL)
6299 return FALSE;
6300 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6301 }
6302 memset (opd_adjust, 0, amt);
6303
6304 if (no_opd_opt)
6305 continue;
6306
6307 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6308 continue;
6309
6310 if (sec->output_section == bfd_abs_section_ptr)
6311 continue;
6312
6313 /* Look through the section relocs. */
6314 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6315 continue;
6316
6317 local_syms = NULL;
6318 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6319 sym_hashes = elf_sym_hashes (ibfd);
6320
6321 /* Read the relocations. */
6322 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6323 info->keep_memory);
6324 if (relstart == NULL)
6325 return FALSE;
6326
6327 /* First run through the relocs to check they are sane, and to
6328 determine whether we need to edit this opd section. */
6329 need_edit = FALSE;
6330 need_pad = sec;
6331 offset = 0;
6332 relend = relstart + sec->reloc_count;
6333 for (rel = relstart; rel < relend; )
6334 {
6335 enum elf_ppc64_reloc_type r_type;
6336 unsigned long r_symndx;
6337 asection *sym_sec;
6338 struct elf_link_hash_entry *h;
6339 Elf_Internal_Sym *sym;
6340
6341 /* .opd contains a regular array of 16 or 24 byte entries. We're
6342 only interested in the reloc pointing to a function entry
6343 point. */
6344 if (rel->r_offset != offset
6345 || rel + 1 >= relend
6346 || (rel + 1)->r_offset != offset + 8)
6347 {
6348 /* If someone messes with .opd alignment then after a
6349 "ld -r" we might have padding in the middle of .opd.
6350 Also, there's nothing to prevent someone putting
6351 something silly in .opd with the assembler. No .opd
6352 optimization for them! */
6353 broken_opd:
6354 (*_bfd_error_handler)
6355 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6356 need_edit = FALSE;
6357 break;
6358 }
6359
6360 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6361 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6362 {
6363 (*_bfd_error_handler)
6364 (_("%B: unexpected reloc type %u in .opd section"),
6365 ibfd, r_type);
6366 need_edit = FALSE;
6367 break;
6368 }
6369
6370 r_symndx = ELF64_R_SYM (rel->r_info);
6371 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6372 r_symndx, ibfd))
6373 goto error_ret;
6374
6375 if (sym_sec == NULL || sym_sec->owner == NULL)
6376 {
6377 const char *sym_name;
6378 if (h != NULL)
6379 sym_name = h->root.root.string;
6380 else
6381 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6382 sym_sec);
6383
6384 (*_bfd_error_handler)
6385 (_("%B: undefined sym `%s' in .opd section"),
6386 ibfd, sym_name);
6387 need_edit = FALSE;
6388 break;
6389 }
6390
6391 /* opd entries are always for functions defined in the
6392 current input bfd. If the symbol isn't defined in the
6393 input bfd, then we won't be using the function in this
6394 bfd; It must be defined in a linkonce section in another
6395 bfd, or is weak. It's also possible that we are
6396 discarding the function due to a linker script /DISCARD/,
6397 which we test for via the output_section. */
6398 if (sym_sec->owner != ibfd
6399 || sym_sec->output_section == bfd_abs_section_ptr)
6400 need_edit = TRUE;
6401
6402 rel += 2;
6403 if (rel == relend
6404 || (rel + 1 == relend && rel->r_offset == offset + 16))
6405 {
6406 if (sec->size == offset + 24)
6407 {
6408 need_pad = NULL;
6409 break;
6410 }
6411 if (rel == relend && sec->size == offset + 16)
6412 {
6413 cnt_16b++;
6414 break;
6415 }
6416 goto broken_opd;
6417 }
6418
6419 if (rel->r_offset == offset + 24)
6420 offset += 24;
6421 else if (rel->r_offset != offset + 16)
6422 goto broken_opd;
6423 else if (rel + 1 < relend
6424 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6425 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6426 {
6427 offset += 16;
6428 cnt_16b++;
6429 }
6430 else if (rel + 2 < relend
6431 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6432 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6433 {
6434 offset += 24;
6435 rel += 1;
6436 }
6437 else
6438 goto broken_opd;
6439 }
6440
6441 add_aux_fields = non_overlapping && cnt_16b > 0;
6442
6443 if (need_edit || add_aux_fields)
6444 {
6445 Elf_Internal_Rela *write_rel;
6446 bfd_byte *rptr, *wptr;
6447 bfd_byte *new_contents = NULL;
6448 bfd_boolean skip;
6449 long opd_ent_size;
6450
6451 /* This seems a waste of time as input .opd sections are all
6452 zeros as generated by gcc, but I suppose there's no reason
6453 this will always be so. We might start putting something in
6454 the third word of .opd entries. */
6455 if ((sec->flags & SEC_IN_MEMORY) == 0)
6456 {
6457 bfd_byte *loc;
6458 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6459 {
6460 if (loc != NULL)
6461 free (loc);
6462 error_ret:
6463 if (local_syms != NULL
6464 && symtab_hdr->contents != (unsigned char *) local_syms)
6465 free (local_syms);
6466 if (elf_section_data (sec)->relocs != relstart)
6467 free (relstart);
6468 return FALSE;
6469 }
6470 sec->contents = loc;
6471 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6472 }
6473
6474 elf_section_data (sec)->relocs = relstart;
6475
6476 new_contents = sec->contents;
6477 if (add_aux_fields)
6478 {
6479 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6480 if (new_contents == NULL)
6481 return FALSE;
6482 need_pad = FALSE;
6483 }
6484 wptr = new_contents;
6485 rptr = sec->contents;
6486
6487 write_rel = relstart;
6488 skip = FALSE;
6489 offset = 0;
6490 opd_ent_size = 0;
6491 for (rel = relstart; rel < relend; rel++)
6492 {
6493 unsigned long r_symndx;
6494 asection *sym_sec;
6495 struct elf_link_hash_entry *h;
6496 Elf_Internal_Sym *sym;
6497
6498 r_symndx = ELF64_R_SYM (rel->r_info);
6499 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6500 r_symndx, ibfd))
6501 goto error_ret;
6502
6503 if (rel->r_offset == offset)
6504 {
6505 struct ppc_link_hash_entry *fdh = NULL;
6506
6507 /* See if the .opd entry is full 24 byte or
6508 16 byte (with fd_aux entry overlapped with next
6509 fd_func). */
6510 opd_ent_size = 24;
6511 if ((rel + 2 == relend && sec->size == offset + 16)
6512 || (rel + 3 < relend
6513 && rel[2].r_offset == offset + 16
6514 && rel[3].r_offset == offset + 24
6515 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6516 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6517 opd_ent_size = 16;
6518
6519 if (h != NULL
6520 && h->root.root.string[0] == '.')
6521 {
6522 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6523 ppc_hash_table (info));
6524 if (fdh != NULL
6525 && fdh->elf.root.type != bfd_link_hash_defined
6526 && fdh->elf.root.type != bfd_link_hash_defweak)
6527 fdh = NULL;
6528 }
6529
6530 skip = (sym_sec->owner != ibfd
6531 || sym_sec->output_section == bfd_abs_section_ptr);
6532 if (skip)
6533 {
6534 if (fdh != NULL && sym_sec->owner == ibfd)
6535 {
6536 /* Arrange for the function descriptor sym
6537 to be dropped. */
6538 fdh->elf.root.u.def.value = 0;
6539 fdh->elf.root.u.def.section = sym_sec;
6540 }
6541 opd_adjust[rel->r_offset / 8] = -1;
6542 }
6543 else
6544 {
6545 /* We'll be keeping this opd entry. */
6546
6547 if (fdh != NULL)
6548 {
6549 /* Redefine the function descriptor symbol to
6550 this location in the opd section. It is
6551 necessary to update the value here rather
6552 than using an array of adjustments as we do
6553 for local symbols, because various places
6554 in the generic ELF code use the value
6555 stored in u.def.value. */
6556 fdh->elf.root.u.def.value = wptr - new_contents;
6557 fdh->adjust_done = 1;
6558 }
6559
6560 /* Local syms are a bit tricky. We could
6561 tweak them as they can be cached, but
6562 we'd need to look through the local syms
6563 for the function descriptor sym which we
6564 don't have at the moment. So keep an
6565 array of adjustments. */
6566 opd_adjust[rel->r_offset / 8]
6567 = (wptr - new_contents) - (rptr - sec->contents);
6568
6569 if (wptr != rptr)
6570 memcpy (wptr, rptr, opd_ent_size);
6571 wptr += opd_ent_size;
6572 if (add_aux_fields && opd_ent_size == 16)
6573 {
6574 memset (wptr, '\0', 8);
6575 wptr += 8;
6576 }
6577 }
6578 rptr += opd_ent_size;
6579 offset += opd_ent_size;
6580 }
6581
6582 if (skip)
6583 {
6584 if (!NO_OPD_RELOCS
6585 && !info->relocatable
6586 && !dec_dynrel_count (rel->r_info, sec, info,
6587 NULL, h, sym_sec))
6588 goto error_ret;
6589 }
6590 else
6591 {
6592 /* We need to adjust any reloc offsets to point to the
6593 new opd entries. While we're at it, we may as well
6594 remove redundant relocs. */
6595 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6596 if (write_rel != rel)
6597 memcpy (write_rel, rel, sizeof (*rel));
6598 ++write_rel;
6599 }
6600 }
6601
6602 sec->size = wptr - new_contents;
6603 sec->reloc_count = write_rel - relstart;
6604 if (add_aux_fields)
6605 {
6606 free (sec->contents);
6607 sec->contents = new_contents;
6608 }
6609
6610 /* Fudge the size too, as this is used later in
6611 elf_bfd_final_link if we are emitting relocs. */
6612 elf_section_data (sec)->rel_hdr.sh_size
6613 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6614 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6615 some_edited = TRUE;
6616 }
6617 else if (elf_section_data (sec)->relocs != relstart)
6618 free (relstart);
6619
6620 if (local_syms != NULL
6621 && symtab_hdr->contents != (unsigned char *) local_syms)
6622 {
6623 if (!info->keep_memory)
6624 free (local_syms);
6625 else
6626 symtab_hdr->contents = (unsigned char *) local_syms;
6627 }
6628 }
6629
6630 if (some_edited)
6631 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6632
6633 /* If we are doing a final link and the last .opd entry is just 16 byte
6634 long, add a 8 byte padding after it. */
6635 if (need_pad != NULL && !info->relocatable)
6636 {
6637 bfd_byte *p;
6638
6639 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6640 {
6641 BFD_ASSERT (need_pad->size > 0);
6642
6643 p = bfd_malloc (need_pad->size + 8);
6644 if (p == NULL)
6645 return FALSE;
6646
6647 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6648 p, 0, need_pad->size))
6649 return FALSE;
6650
6651 need_pad->contents = p;
6652 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6653 }
6654 else
6655 {
6656 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6657 if (p == NULL)
6658 return FALSE;
6659
6660 need_pad->contents = p;
6661 }
6662
6663 memset (need_pad->contents + need_pad->size, 0, 8);
6664 need_pad->size += 8;
6665 }
6666
6667 return TRUE;
6668 }
6669
6670 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6671
6672 asection *
6673 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6674 {
6675 struct ppc_link_hash_table *htab;
6676
6677 htab = ppc_hash_table (info);
6678 if (htab->tls_get_addr != NULL)
6679 {
6680 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6681
6682 while (h->elf.root.type == bfd_link_hash_indirect
6683 || h->elf.root.type == bfd_link_hash_warning)
6684 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6685
6686 htab->tls_get_addr = h;
6687
6688 if (htab->tls_get_addr_fd == NULL
6689 && h->oh != NULL
6690 && h->oh->is_func_descriptor
6691 && (h->oh->elf.root.type == bfd_link_hash_defined
6692 || h->oh->elf.root.type == bfd_link_hash_defweak))
6693 htab->tls_get_addr_fd = h->oh;
6694 }
6695
6696 if (htab->tls_get_addr_fd != NULL)
6697 {
6698 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6699
6700 while (h->elf.root.type == bfd_link_hash_indirect
6701 || h->elf.root.type == bfd_link_hash_warning)
6702 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6703
6704 htab->tls_get_addr_fd = h;
6705 }
6706
6707 return _bfd_elf_tls_setup (obfd, info);
6708 }
6709
6710 /* Run through all the TLS relocs looking for optimization
6711 opportunities. The linker has been hacked (see ppc64elf.em) to do
6712 a preliminary section layout so that we know the TLS segment
6713 offsets. We can't optimize earlier because some optimizations need
6714 to know the tp offset, and we need to optimize before allocating
6715 dynamic relocations. */
6716
6717 bfd_boolean
6718 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6719 {
6720 bfd *ibfd;
6721 asection *sec;
6722 struct ppc_link_hash_table *htab;
6723
6724 if (info->relocatable || info->shared)
6725 return TRUE;
6726
6727 htab = ppc_hash_table (info);
6728 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6729 {
6730 Elf_Internal_Sym *locsyms = NULL;
6731 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6732 unsigned char *toc_ref = NULL;
6733
6734 /* Look at all the sections for this file, with TOC last. */
6735 for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next
6736 : ibfd->sections);
6737 sec != NULL;
6738 sec = (sec == toc ? NULL
6739 : sec->next == NULL ? toc
6740 : sec->next == toc && toc->next ? toc->next
6741 : sec->next))
6742 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6743 {
6744 Elf_Internal_Rela *relstart, *rel, *relend;
6745 int expecting_tls_get_addr;
6746 long toc_ref_index = 0;
6747
6748 /* Read the relocations. */
6749 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6750 info->keep_memory);
6751 if (relstart == NULL)
6752 return FALSE;
6753
6754 expecting_tls_get_addr = 0;
6755 relend = relstart + sec->reloc_count;
6756 for (rel = relstart; rel < relend; rel++)
6757 {
6758 enum elf_ppc64_reloc_type r_type;
6759 unsigned long r_symndx;
6760 struct elf_link_hash_entry *h;
6761 Elf_Internal_Sym *sym;
6762 asection *sym_sec;
6763 char *tls_mask;
6764 char tls_set, tls_clear, tls_type = 0;
6765 bfd_vma value;
6766 bfd_boolean ok_tprel, is_local;
6767
6768 r_symndx = ELF64_R_SYM (rel->r_info);
6769 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6770 r_symndx, ibfd))
6771 {
6772 err_free_rel:
6773 if (elf_section_data (sec)->relocs != relstart)
6774 free (relstart);
6775 if (toc_ref != NULL)
6776 free (toc_ref);
6777 if (locsyms != NULL
6778 && (elf_tdata (ibfd)->symtab_hdr.contents
6779 != (unsigned char *) locsyms))
6780 free (locsyms);
6781 return FALSE;
6782 }
6783
6784 if (h != NULL)
6785 {
6786 if (h->root.type != bfd_link_hash_defined
6787 && h->root.type != bfd_link_hash_defweak)
6788 continue;
6789 value = h->root.u.def.value;
6790 }
6791 else
6792 /* Symbols referenced by TLS relocs must be of type
6793 STT_TLS. So no need for .opd local sym adjust. */
6794 value = sym->st_value;
6795
6796 ok_tprel = FALSE;
6797 is_local = FALSE;
6798 if (h == NULL
6799 || !h->def_dynamic)
6800 {
6801 is_local = TRUE;
6802 value += sym_sec->output_offset;
6803 value += sym_sec->output_section->vma;
6804 value -= htab->elf.tls_sec->vma;
6805 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6806 < (bfd_vma) 1 << 32);
6807 }
6808
6809 r_type = ELF64_R_TYPE (rel->r_info);
6810 switch (r_type)
6811 {
6812 case R_PPC64_GOT_TLSLD16:
6813 case R_PPC64_GOT_TLSLD16_LO:
6814 case R_PPC64_GOT_TLSLD16_HI:
6815 case R_PPC64_GOT_TLSLD16_HA:
6816 /* These relocs should never be against a symbol
6817 defined in a shared lib. Leave them alone if
6818 that turns out to be the case. */
6819 ppc64_tlsld_got (ibfd)->refcount -= 1;
6820 if (!is_local)
6821 continue;
6822
6823 /* LD -> LE */
6824 tls_set = 0;
6825 tls_clear = TLS_LD;
6826 tls_type = TLS_TLS | TLS_LD;
6827 expecting_tls_get_addr = 1;
6828 break;
6829
6830 case R_PPC64_GOT_TLSGD16:
6831 case R_PPC64_GOT_TLSGD16_LO:
6832 case R_PPC64_GOT_TLSGD16_HI:
6833 case R_PPC64_GOT_TLSGD16_HA:
6834 if (ok_tprel)
6835 /* GD -> LE */
6836 tls_set = 0;
6837 else
6838 /* GD -> IE */
6839 tls_set = TLS_TLS | TLS_TPRELGD;
6840 tls_clear = TLS_GD;
6841 tls_type = TLS_TLS | TLS_GD;
6842 expecting_tls_get_addr = 1;
6843 break;
6844
6845 case R_PPC64_GOT_TPREL16_DS:
6846 case R_PPC64_GOT_TPREL16_LO_DS:
6847 case R_PPC64_GOT_TPREL16_HI:
6848 case R_PPC64_GOT_TPREL16_HA:
6849 expecting_tls_get_addr = 0;
6850 if (ok_tprel)
6851 {
6852 /* IE -> LE */
6853 tls_set = 0;
6854 tls_clear = TLS_TPREL;
6855 tls_type = TLS_TLS | TLS_TPREL;
6856 break;
6857 }
6858 else
6859 continue;
6860
6861 case R_PPC64_REL14:
6862 case R_PPC64_REL14_BRTAKEN:
6863 case R_PPC64_REL14_BRNTAKEN:
6864 case R_PPC64_REL24:
6865 if (h != NULL
6866 && (h == &htab->tls_get_addr->elf
6867 || h == &htab->tls_get_addr_fd->elf))
6868 {
6869 if (!expecting_tls_get_addr
6870 && rel != relstart
6871 && ((ELF64_R_TYPE (rel[-1].r_info)
6872 == R_PPC64_TOC16)
6873 || (ELF64_R_TYPE (rel[-1].r_info)
6874 == R_PPC64_TOC16_LO)))
6875 {
6876 /* Check for toc tls entries. */
6877 char *toc_tls;
6878 int retval;
6879
6880 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6881 rel - 1, ibfd);
6882 if (retval == 0)
6883 goto err_free_rel;
6884 if (retval > 1 && toc_tls != NULL)
6885 {
6886 expecting_tls_get_addr = 1;
6887 if (toc_ref != NULL)
6888 toc_ref[toc_ref_index] = 1;
6889 }
6890 }
6891
6892 if (expecting_tls_get_addr)
6893 {
6894 struct plt_entry *ent;
6895 for (ent = h->plt.plist; ent; ent = ent->next)
6896 if (ent->addend == 0)
6897 {
6898 if (ent->plt.refcount > 0)
6899 ent->plt.refcount -= 1;
6900 break;
6901 }
6902 }
6903 }
6904 expecting_tls_get_addr = 0;
6905 continue;
6906
6907 case R_PPC64_TOC16:
6908 case R_PPC64_TOC16_LO:
6909 case R_PPC64_TLS:
6910 expecting_tls_get_addr = 0;
6911 if (sym_sec == toc && toc != NULL)
6912 {
6913 /* Mark this toc entry as referenced by a TLS
6914 code sequence. We can do that now in the
6915 case of R_PPC64_TLS, and after checking for
6916 tls_get_addr for the TOC16 relocs. */
6917 if (toc_ref == NULL)
6918 {
6919 toc_ref = bfd_zmalloc (toc->size / 8);
6920 if (toc_ref == NULL)
6921 goto err_free_rel;
6922 }
6923 if (h != NULL)
6924 value = h->root.u.def.value;
6925 else
6926 value = sym->st_value;
6927 value += rel->r_addend;
6928 BFD_ASSERT (value < toc->size && value % 8 == 0);
6929 toc_ref_index = value / 8;
6930 if (r_type == R_PPC64_TLS)
6931 toc_ref[toc_ref_index] = 1;
6932 }
6933 continue;
6934
6935 case R_PPC64_TPREL64:
6936 expecting_tls_get_addr = 0;
6937 if (sec != toc
6938 || toc_ref == NULL
6939 || !toc_ref[rel->r_offset / 8])
6940 continue;
6941 if (ok_tprel)
6942 {
6943 /* IE -> LE */
6944 tls_set = TLS_EXPLICIT;
6945 tls_clear = TLS_TPREL;
6946 break;
6947 }
6948 else
6949 continue;
6950
6951 case R_PPC64_DTPMOD64:
6952 expecting_tls_get_addr = 0;
6953 if (sec != toc
6954 || toc_ref == NULL
6955 || !toc_ref[rel->r_offset / 8])
6956 continue;
6957 if (rel + 1 < relend
6958 && (rel[1].r_info
6959 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6960 && rel[1].r_offset == rel->r_offset + 8)
6961 {
6962 if (ok_tprel)
6963 /* GD -> LE */
6964 tls_set = TLS_EXPLICIT | TLS_GD;
6965 else
6966 /* GD -> IE */
6967 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6968 tls_clear = TLS_GD;
6969 }
6970 else
6971 {
6972 if (!is_local)
6973 continue;
6974
6975 /* LD -> LE */
6976 tls_set = TLS_EXPLICIT;
6977 tls_clear = TLS_LD;
6978 }
6979 break;
6980
6981 default:
6982 expecting_tls_get_addr = 0;
6983 continue;
6984 }
6985
6986 if ((tls_set & TLS_EXPLICIT) == 0)
6987 {
6988 struct got_entry *ent;
6989
6990 /* Adjust got entry for this reloc. */
6991 if (h != NULL)
6992 ent = h->got.glist;
6993 else
6994 ent = elf_local_got_ents (ibfd)[r_symndx];
6995
6996 for (; ent != NULL; ent = ent->next)
6997 if (ent->addend == rel->r_addend
6998 && ent->owner == ibfd
6999 && ent->tls_type == tls_type)
7000 break;
7001 if (ent == NULL)
7002 abort ();
7003
7004 if (tls_set == 0)
7005 {
7006 /* We managed to get rid of a got entry. */
7007 if (ent->got.refcount > 0)
7008 ent->got.refcount -= 1;
7009 }
7010 }
7011 else
7012 {
7013 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7014 we'll lose one or two dyn relocs. */
7015 if (!dec_dynrel_count (rel->r_info, sec, info,
7016 NULL, h, sym_sec))
7017 return FALSE;
7018
7019 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7020 {
7021 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7022 NULL, h, sym_sec))
7023 return FALSE;
7024 }
7025 }
7026
7027 *tls_mask |= tls_set;
7028 *tls_mask &= ~tls_clear;
7029 }
7030
7031 if (elf_section_data (sec)->relocs != relstart)
7032 free (relstart);
7033 }
7034
7035 if (toc_ref != NULL)
7036 free (toc_ref);
7037
7038 if (locsyms != NULL
7039 && (elf_tdata (ibfd)->symtab_hdr.contents
7040 != (unsigned char *) locsyms))
7041 {
7042 if (!info->keep_memory)
7043 free (locsyms);
7044 else
7045 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7046 }
7047 }
7048 return TRUE;
7049 }
7050
7051 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7052 the values of any global symbols in a toc section that has been
7053 edited. Globals in toc sections should be a rarity, so this function
7054 sets a flag if any are found in toc sections other than the one just
7055 edited, so that futher hash table traversals can be avoided. */
7056
7057 struct adjust_toc_info
7058 {
7059 asection *toc;
7060 unsigned long *skip;
7061 bfd_boolean global_toc_syms;
7062 };
7063
7064 static bfd_boolean
7065 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7066 {
7067 struct ppc_link_hash_entry *eh;
7068 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7069
7070 if (h->root.type == bfd_link_hash_indirect)
7071 return TRUE;
7072
7073 if (h->root.type == bfd_link_hash_warning)
7074 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7075
7076 if (h->root.type != bfd_link_hash_defined
7077 && h->root.type != bfd_link_hash_defweak)
7078 return TRUE;
7079
7080 eh = (struct ppc_link_hash_entry *) h;
7081 if (eh->adjust_done)
7082 return TRUE;
7083
7084 if (eh->elf.root.u.def.section == toc_inf->toc)
7085 {
7086 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7087 if (skip != (unsigned long) -1)
7088 eh->elf.root.u.def.value -= skip;
7089 else
7090 {
7091 (*_bfd_error_handler)
7092 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7093 eh->elf.root.u.def.section = &bfd_abs_section;
7094 eh->elf.root.u.def.value = 0;
7095 }
7096 eh->adjust_done = 1;
7097 }
7098 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7099 toc_inf->global_toc_syms = TRUE;
7100
7101 return TRUE;
7102 }
7103
7104 /* Examine all relocs referencing .toc sections in order to remove
7105 unused .toc entries. */
7106
7107 bfd_boolean
7108 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7109 {
7110 bfd *ibfd;
7111 struct adjust_toc_info toc_inf;
7112
7113 toc_inf.global_toc_syms = TRUE;
7114 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7115 {
7116 asection *toc, *sec;
7117 Elf_Internal_Shdr *symtab_hdr;
7118 Elf_Internal_Sym *local_syms;
7119 struct elf_link_hash_entry **sym_hashes;
7120 Elf_Internal_Rela *relstart, *rel;
7121 unsigned long *skip, *drop;
7122 unsigned char *used;
7123 unsigned char *keep, last, some_unused;
7124
7125 toc = bfd_get_section_by_name (ibfd, ".toc");
7126 if (toc == NULL
7127 || toc->size == 0
7128 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7129 || elf_discarded_section (toc))
7130 continue;
7131
7132 local_syms = NULL;
7133 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7134 sym_hashes = elf_sym_hashes (ibfd);
7135
7136 /* Look at sections dropped from the final link. */
7137 skip = NULL;
7138 relstart = NULL;
7139 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7140 {
7141 if (sec->reloc_count == 0
7142 || !elf_discarded_section (sec)
7143 || get_opd_info (sec)
7144 || (sec->flags & SEC_ALLOC) == 0
7145 || (sec->flags & SEC_DEBUGGING) != 0)
7146 continue;
7147
7148 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7149 if (relstart == NULL)
7150 goto error_ret;
7151
7152 /* Run through the relocs to see which toc entries might be
7153 unused. */
7154 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7155 {
7156 enum elf_ppc64_reloc_type r_type;
7157 unsigned long r_symndx;
7158 asection *sym_sec;
7159 struct elf_link_hash_entry *h;
7160 Elf_Internal_Sym *sym;
7161 bfd_vma val;
7162
7163 r_type = ELF64_R_TYPE (rel->r_info);
7164 switch (r_type)
7165 {
7166 default:
7167 continue;
7168
7169 case R_PPC64_TOC16:
7170 case R_PPC64_TOC16_LO:
7171 case R_PPC64_TOC16_HI:
7172 case R_PPC64_TOC16_HA:
7173 case R_PPC64_TOC16_DS:
7174 case R_PPC64_TOC16_LO_DS:
7175 break;
7176 }
7177
7178 r_symndx = ELF64_R_SYM (rel->r_info);
7179 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7180 r_symndx, ibfd))
7181 goto error_ret;
7182
7183 if (sym_sec != toc)
7184 continue;
7185
7186 if (h != NULL)
7187 val = h->root.u.def.value;
7188 else
7189 val = sym->st_value;
7190 val += rel->r_addend;
7191
7192 if (val >= toc->size)
7193 continue;
7194
7195 /* Anything in the toc ought to be aligned to 8 bytes.
7196 If not, don't mark as unused. */
7197 if (val & 7)
7198 continue;
7199
7200 if (skip == NULL)
7201 {
7202 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7203 if (skip == NULL)
7204 goto error_ret;
7205 }
7206
7207 skip[val >> 3] = 1;
7208 }
7209
7210 if (elf_section_data (sec)->relocs != relstart)
7211 free (relstart);
7212 }
7213
7214 if (skip == NULL)
7215 continue;
7216
7217 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7218 if (used == NULL)
7219 {
7220 error_ret:
7221 if (local_syms != NULL
7222 && symtab_hdr->contents != (unsigned char *) local_syms)
7223 free (local_syms);
7224 if (sec != NULL
7225 && relstart != NULL
7226 && elf_section_data (sec)->relocs != relstart)
7227 free (relstart);
7228 if (skip != NULL)
7229 free (skip);
7230 return FALSE;
7231 }
7232
7233 /* Now check all kept sections that might reference the toc.
7234 Check the toc itself last. */
7235 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7236 : ibfd->sections);
7237 sec != NULL;
7238 sec = (sec == toc ? NULL
7239 : sec->next == NULL ? toc
7240 : sec->next == toc && toc->next ? toc->next
7241 : sec->next))
7242 {
7243 int repeat;
7244
7245 if (sec->reloc_count == 0
7246 || elf_discarded_section (sec)
7247 || get_opd_info (sec)
7248 || (sec->flags & SEC_ALLOC) == 0
7249 || (sec->flags & SEC_DEBUGGING) != 0)
7250 continue;
7251
7252 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7253 if (relstart == NULL)
7254 goto error_ret;
7255
7256 /* Mark toc entries referenced as used. */
7257 repeat = 0;
7258 do
7259 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7260 {
7261 enum elf_ppc64_reloc_type r_type;
7262 unsigned long r_symndx;
7263 asection *sym_sec;
7264 struct elf_link_hash_entry *h;
7265 Elf_Internal_Sym *sym;
7266 bfd_vma val;
7267
7268 r_type = ELF64_R_TYPE (rel->r_info);
7269 switch (r_type)
7270 {
7271 case R_PPC64_TOC16:
7272 case R_PPC64_TOC16_LO:
7273 case R_PPC64_TOC16_HI:
7274 case R_PPC64_TOC16_HA:
7275 case R_PPC64_TOC16_DS:
7276 case R_PPC64_TOC16_LO_DS:
7277 /* In case we're taking addresses of toc entries. */
7278 case R_PPC64_ADDR64:
7279 break;
7280
7281 default:
7282 continue;
7283 }
7284
7285 r_symndx = ELF64_R_SYM (rel->r_info);
7286 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7287 r_symndx, ibfd))
7288 {
7289 free (used);
7290 goto error_ret;
7291 }
7292
7293 if (sym_sec != toc)
7294 continue;
7295
7296 if (h != NULL)
7297 val = h->root.u.def.value;
7298 else
7299 val = sym->st_value;
7300 val += rel->r_addend;
7301
7302 if (val >= toc->size)
7303 continue;
7304
7305 /* For the toc section, we only mark as used if
7306 this entry itself isn't unused. */
7307 if (sec == toc
7308 && !used[val >> 3]
7309 && (used[rel->r_offset >> 3]
7310 || !skip[rel->r_offset >> 3]))
7311 /* Do all the relocs again, to catch reference
7312 chains. */
7313 repeat = 1;
7314
7315 used[val >> 3] = 1;
7316 }
7317 while (repeat);
7318 }
7319
7320 /* Merge the used and skip arrays. Assume that TOC
7321 doublewords not appearing as either used or unused belong
7322 to to an entry more than one doubleword in size. */
7323 for (drop = skip, keep = used, last = 0, some_unused = 0;
7324 drop < skip + (toc->size + 7) / 8;
7325 ++drop, ++keep)
7326 {
7327 if (*keep)
7328 {
7329 *drop = 0;
7330 last = 0;
7331 }
7332 else if (*drop)
7333 {
7334 some_unused = 1;
7335 last = 1;
7336 }
7337 else
7338 *drop = last;
7339 }
7340
7341 free (used);
7342
7343 if (some_unused)
7344 {
7345 bfd_byte *contents, *src;
7346 unsigned long off;
7347
7348 /* Shuffle the toc contents, and at the same time convert the
7349 skip array from booleans into offsets. */
7350 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7351 goto error_ret;
7352
7353 elf_section_data (toc)->this_hdr.contents = contents;
7354
7355 for (src = contents, off = 0, drop = skip;
7356 src < contents + toc->size;
7357 src += 8, ++drop)
7358 {
7359 if (*drop)
7360 {
7361 *drop = (unsigned long) -1;
7362 off += 8;
7363 }
7364 else if (off != 0)
7365 {
7366 *drop = off;
7367 memcpy (src - off, src, 8);
7368 }
7369 }
7370 toc->rawsize = toc->size;
7371 toc->size = src - contents - off;
7372
7373 if (toc->reloc_count != 0)
7374 {
7375 Elf_Internal_Rela *wrel;
7376 bfd_size_type sz;
7377
7378 /* Read toc relocs. */
7379 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7380 TRUE);
7381 if (relstart == NULL)
7382 goto error_ret;
7383
7384 /* Remove unused toc relocs, and adjust those we keep. */
7385 wrel = relstart;
7386 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7387 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7388 {
7389 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7390 wrel->r_info = rel->r_info;
7391 wrel->r_addend = rel->r_addend;
7392 ++wrel;
7393 }
7394 else if (!dec_dynrel_count (rel->r_info, toc, info,
7395 &local_syms, NULL, NULL))
7396 goto error_ret;
7397
7398 toc->reloc_count = wrel - relstart;
7399 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7400 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7401 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7402 }
7403
7404 /* Adjust addends for relocs against the toc section sym. */
7405 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7406 {
7407 if (sec->reloc_count == 0
7408 || elf_discarded_section (sec))
7409 continue;
7410
7411 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7412 TRUE);
7413 if (relstart == NULL)
7414 goto error_ret;
7415
7416 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7417 {
7418 enum elf_ppc64_reloc_type r_type;
7419 unsigned long r_symndx;
7420 asection *sym_sec;
7421 struct elf_link_hash_entry *h;
7422 Elf_Internal_Sym *sym;
7423
7424 r_type = ELF64_R_TYPE (rel->r_info);
7425 switch (r_type)
7426 {
7427 default:
7428 continue;
7429
7430 case R_PPC64_TOC16:
7431 case R_PPC64_TOC16_LO:
7432 case R_PPC64_TOC16_HI:
7433 case R_PPC64_TOC16_HA:
7434 case R_PPC64_TOC16_DS:
7435 case R_PPC64_TOC16_LO_DS:
7436 case R_PPC64_ADDR64:
7437 break;
7438 }
7439
7440 r_symndx = ELF64_R_SYM (rel->r_info);
7441 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7442 r_symndx, ibfd))
7443 goto error_ret;
7444
7445 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7446 continue;
7447
7448 rel->r_addend -= skip[rel->r_addend >> 3];
7449 }
7450 }
7451
7452 /* We shouldn't have local or global symbols defined in the TOC,
7453 but handle them anyway. */
7454 if (local_syms != NULL)
7455 {
7456 Elf_Internal_Sym *sym;
7457
7458 for (sym = local_syms;
7459 sym < local_syms + symtab_hdr->sh_info;
7460 ++sym)
7461 if (sym->st_shndx != SHN_UNDEF
7462 && (sym->st_shndx < SHN_LORESERVE
7463 || sym->st_shndx > SHN_HIRESERVE)
7464 && sym->st_value != 0
7465 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7466 {
7467 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7468 sym->st_value -= skip[sym->st_value >> 3];
7469 else
7470 {
7471 (*_bfd_error_handler)
7472 (_("%s defined in removed toc entry"),
7473 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7474 NULL));
7475 sym->st_value = 0;
7476 sym->st_shndx = SHN_ABS;
7477 }
7478 symtab_hdr->contents = (unsigned char *) local_syms;
7479 }
7480 }
7481
7482 /* Finally, adjust any global syms defined in the toc. */
7483 if (toc_inf.global_toc_syms)
7484 {
7485 toc_inf.toc = toc;
7486 toc_inf.skip = skip;
7487 toc_inf.global_toc_syms = FALSE;
7488 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7489 &toc_inf);
7490 }
7491 }
7492
7493 if (local_syms != NULL
7494 && symtab_hdr->contents != (unsigned char *) local_syms)
7495 {
7496 if (!info->keep_memory)
7497 free (local_syms);
7498 else
7499 symtab_hdr->contents = (unsigned char *) local_syms;
7500 }
7501 free (skip);
7502 }
7503
7504 return TRUE;
7505 }
7506
7507 /* Allocate space in .plt, .got and associated reloc sections for
7508 dynamic relocs. */
7509
7510 static bfd_boolean
7511 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7512 {
7513 struct bfd_link_info *info;
7514 struct ppc_link_hash_table *htab;
7515 asection *s;
7516 struct ppc_link_hash_entry *eh;
7517 struct ppc_dyn_relocs *p;
7518 struct got_entry *gent;
7519
7520 if (h->root.type == bfd_link_hash_indirect)
7521 return TRUE;
7522
7523 if (h->root.type == bfd_link_hash_warning)
7524 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7525
7526 info = (struct bfd_link_info *) inf;
7527 htab = ppc_hash_table (info);
7528
7529 if (htab->elf.dynamic_sections_created
7530 && h->dynindx != -1
7531 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7532 {
7533 struct plt_entry *pent;
7534 bfd_boolean doneone = FALSE;
7535 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7536 if (pent->plt.refcount > 0)
7537 {
7538 /* If this is the first .plt entry, make room for the special
7539 first entry. */
7540 s = htab->plt;
7541 if (s->size == 0)
7542 s->size += PLT_INITIAL_ENTRY_SIZE;
7543
7544 pent->plt.offset = s->size;
7545
7546 /* Make room for this entry. */
7547 s->size += PLT_ENTRY_SIZE;
7548
7549 /* Make room for the .glink code. */
7550 s = htab->glink;
7551 if (s->size == 0)
7552 s->size += GLINK_CALL_STUB_SIZE;
7553 /* We need bigger stubs past index 32767. */
7554 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7555 s->size += 4;
7556 s->size += 2*4;
7557
7558 /* We also need to make an entry in the .rela.plt section. */
7559 s = htab->relplt;
7560 s->size += sizeof (Elf64_External_Rela);
7561 doneone = TRUE;
7562 }
7563 else
7564 pent->plt.offset = (bfd_vma) -1;
7565 if (!doneone)
7566 {
7567 h->plt.plist = NULL;
7568 h->needs_plt = 0;
7569 }
7570 }
7571 else
7572 {
7573 h->plt.plist = NULL;
7574 h->needs_plt = 0;
7575 }
7576
7577 eh = (struct ppc_link_hash_entry *) h;
7578 /* Run through the TLS GD got entries first if we're changing them
7579 to TPREL. */
7580 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7581 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7582 if (gent->got.refcount > 0
7583 && (gent->tls_type & TLS_GD) != 0)
7584 {
7585 /* This was a GD entry that has been converted to TPREL. If
7586 there happens to be a TPREL entry we can use that one. */
7587 struct got_entry *ent;
7588 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7589 if (ent->got.refcount > 0
7590 && (ent->tls_type & TLS_TPREL) != 0
7591 && ent->addend == gent->addend
7592 && ent->owner == gent->owner)
7593 {
7594 gent->got.refcount = 0;
7595 break;
7596 }
7597
7598 /* If not, then we'll be using our own TPREL entry. */
7599 if (gent->got.refcount != 0)
7600 gent->tls_type = TLS_TLS | TLS_TPREL;
7601 }
7602
7603 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7604 if (gent->got.refcount > 0)
7605 {
7606 bfd_boolean dyn;
7607
7608 /* Make sure this symbol is output as a dynamic symbol.
7609 Undefined weak syms won't yet be marked as dynamic,
7610 nor will all TLS symbols. */
7611 if (h->dynindx == -1
7612 && !h->forced_local)
7613 {
7614 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7615 return FALSE;
7616 }
7617
7618 if ((gent->tls_type & TLS_LD) != 0
7619 && !h->def_dynamic)
7620 {
7621 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7622 continue;
7623 }
7624
7625 s = ppc64_elf_tdata (gent->owner)->got;
7626 gent->got.offset = s->size;
7627 s->size
7628 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7629 dyn = htab->elf.dynamic_sections_created;
7630 if ((info->shared
7631 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7632 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7633 || h->root.type != bfd_link_hash_undefweak))
7634 ppc64_elf_tdata (gent->owner)->relgot->size
7635 += (gent->tls_type & eh->tls_mask & TLS_GD
7636 ? 2 * sizeof (Elf64_External_Rela)
7637 : sizeof (Elf64_External_Rela));
7638 }
7639 else
7640 gent->got.offset = (bfd_vma) -1;
7641
7642 if (eh->dyn_relocs == NULL)
7643 return TRUE;
7644
7645 /* In the shared -Bsymbolic case, discard space allocated for
7646 dynamic pc-relative relocs against symbols which turn out to be
7647 defined in regular objects. For the normal shared case, discard
7648 space for relocs that have become local due to symbol visibility
7649 changes. */
7650
7651 if (info->shared)
7652 {
7653 /* Relocs that use pc_count are those that appear on a call insn,
7654 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7655 generated via assembly. We want calls to protected symbols to
7656 resolve directly to the function rather than going via the plt.
7657 If people want function pointer comparisons to work as expected
7658 then they should avoid writing weird assembly. */
7659 if (SYMBOL_CALLS_LOCAL (info, h))
7660 {
7661 struct ppc_dyn_relocs **pp;
7662
7663 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7664 {
7665 p->count -= p->pc_count;
7666 p->pc_count = 0;
7667 if (p->count == 0)
7668 *pp = p->next;
7669 else
7670 pp = &p->next;
7671 }
7672 }
7673
7674 /* Also discard relocs on undefined weak syms with non-default
7675 visibility. */
7676 if (eh->dyn_relocs != NULL
7677 && h->root.type == bfd_link_hash_undefweak)
7678 {
7679 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7680 eh->dyn_relocs = NULL;
7681
7682 /* Make sure this symbol is output as a dynamic symbol.
7683 Undefined weak syms won't yet be marked as dynamic. */
7684 else if (h->dynindx == -1
7685 && !h->forced_local)
7686 {
7687 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7688 return FALSE;
7689 }
7690 }
7691 }
7692 else if (ELIMINATE_COPY_RELOCS)
7693 {
7694 /* For the non-shared case, discard space for relocs against
7695 symbols which turn out to need copy relocs or are not
7696 dynamic. */
7697
7698 if (!h->non_got_ref
7699 && h->def_dynamic
7700 && !h->def_regular)
7701 {
7702 /* Make sure this symbol is output as a dynamic symbol.
7703 Undefined weak syms won't yet be marked as dynamic. */
7704 if (h->dynindx == -1
7705 && !h->forced_local)
7706 {
7707 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7708 return FALSE;
7709 }
7710
7711 /* If that succeeded, we know we'll be keeping all the
7712 relocs. */
7713 if (h->dynindx != -1)
7714 goto keep;
7715 }
7716
7717 eh->dyn_relocs = NULL;
7718
7719 keep: ;
7720 }
7721
7722 /* Finally, allocate space. */
7723 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7724 {
7725 asection *sreloc = elf_section_data (p->sec)->sreloc;
7726 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7727 }
7728
7729 return TRUE;
7730 }
7731
7732 /* Find any dynamic relocs that apply to read-only sections. */
7733
7734 static bfd_boolean
7735 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7736 {
7737 struct ppc_link_hash_entry *eh;
7738 struct ppc_dyn_relocs *p;
7739
7740 if (h->root.type == bfd_link_hash_warning)
7741 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7742
7743 eh = (struct ppc_link_hash_entry *) h;
7744 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7745 {
7746 asection *s = p->sec->output_section;
7747
7748 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7749 {
7750 struct bfd_link_info *info = inf;
7751
7752 info->flags |= DF_TEXTREL;
7753
7754 /* Not an error, just cut short the traversal. */
7755 return FALSE;
7756 }
7757 }
7758 return TRUE;
7759 }
7760
7761 /* Set the sizes of the dynamic sections. */
7762
7763 static bfd_boolean
7764 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7765 struct bfd_link_info *info)
7766 {
7767 struct ppc_link_hash_table *htab;
7768 bfd *dynobj;
7769 asection *s;
7770 bfd_boolean relocs;
7771 bfd *ibfd;
7772
7773 htab = ppc_hash_table (info);
7774 dynobj = htab->elf.dynobj;
7775 if (dynobj == NULL)
7776 abort ();
7777
7778 if (htab->elf.dynamic_sections_created)
7779 {
7780 /* Set the contents of the .interp section to the interpreter. */
7781 if (info->executable)
7782 {
7783 s = bfd_get_section_by_name (dynobj, ".interp");
7784 if (s == NULL)
7785 abort ();
7786 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7787 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7788 }
7789 }
7790
7791 /* Set up .got offsets for local syms, and space for local dynamic
7792 relocs. */
7793 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7794 {
7795 struct got_entry **lgot_ents;
7796 struct got_entry **end_lgot_ents;
7797 char *lgot_masks;
7798 bfd_size_type locsymcount;
7799 Elf_Internal_Shdr *symtab_hdr;
7800 asection *srel;
7801
7802 if (!is_ppc64_elf_target (ibfd->xvec))
7803 continue;
7804
7805 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7806 {
7807 s = ppc64_elf_tdata (ibfd)->got;
7808 ppc64_tlsld_got (ibfd)->offset = s->size;
7809 s->size += 16;
7810 if (info->shared)
7811 {
7812 srel = ppc64_elf_tdata (ibfd)->relgot;
7813 srel->size += sizeof (Elf64_External_Rela);
7814 }
7815 }
7816 else
7817 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7818
7819 for (s = ibfd->sections; s != NULL; s = s->next)
7820 {
7821 struct ppc_dyn_relocs *p;
7822
7823 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7824 {
7825 if (!bfd_is_abs_section (p->sec)
7826 && bfd_is_abs_section (p->sec->output_section))
7827 {
7828 /* Input section has been discarded, either because
7829 it is a copy of a linkonce section or due to
7830 linker script /DISCARD/, so we'll be discarding
7831 the relocs too. */
7832 }
7833 else if (p->count != 0)
7834 {
7835 srel = elf_section_data (p->sec)->sreloc;
7836 srel->size += p->count * sizeof (Elf64_External_Rela);
7837 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7838 info->flags |= DF_TEXTREL;
7839 }
7840 }
7841 }
7842
7843 lgot_ents = elf_local_got_ents (ibfd);
7844 if (!lgot_ents)
7845 continue;
7846
7847 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7848 locsymcount = symtab_hdr->sh_info;
7849 end_lgot_ents = lgot_ents + locsymcount;
7850 lgot_masks = (char *) end_lgot_ents;
7851 s = ppc64_elf_tdata (ibfd)->got;
7852 srel = ppc64_elf_tdata (ibfd)->relgot;
7853 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7854 {
7855 struct got_entry *ent;
7856
7857 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7858 if (ent->got.refcount > 0)
7859 {
7860 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7861 {
7862 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7863 {
7864 ppc64_tlsld_got (ibfd)->offset = s->size;
7865 s->size += 16;
7866 if (info->shared)
7867 srel->size += sizeof (Elf64_External_Rela);
7868 }
7869 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7870 }
7871 else
7872 {
7873 ent->got.offset = s->size;
7874 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7875 {
7876 s->size += 16;
7877 if (info->shared)
7878 srel->size += 2 * sizeof (Elf64_External_Rela);
7879 }
7880 else
7881 {
7882 s->size += 8;
7883 if (info->shared)
7884 srel->size += sizeof (Elf64_External_Rela);
7885 }
7886 }
7887 }
7888 else
7889 ent->got.offset = (bfd_vma) -1;
7890 }
7891 }
7892
7893 /* Allocate global sym .plt and .got entries, and space for global
7894 sym dynamic relocs. */
7895 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7896
7897 /* We now have determined the sizes of the various dynamic sections.
7898 Allocate memory for them. */
7899 relocs = FALSE;
7900 for (s = dynobj->sections; s != NULL; s = s->next)
7901 {
7902 if ((s->flags & SEC_LINKER_CREATED) == 0)
7903 continue;
7904
7905 if (s == htab->brlt || s == htab->relbrlt)
7906 /* These haven't been allocated yet; don't strip. */
7907 continue;
7908 else if (s == htab->got
7909 || s == htab->plt
7910 || s == htab->glink
7911 || s == htab->dynbss)
7912 {
7913 /* Strip this section if we don't need it; see the
7914 comment below. */
7915 }
7916 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7917 {
7918 if (s->size != 0)
7919 {
7920 if (s != htab->relplt)
7921 relocs = TRUE;
7922
7923 /* We use the reloc_count field as a counter if we need
7924 to copy relocs into the output file. */
7925 s->reloc_count = 0;
7926 }
7927 }
7928 else
7929 {
7930 /* It's not one of our sections, so don't allocate space. */
7931 continue;
7932 }
7933
7934 if (s->size == 0)
7935 {
7936 /* If we don't need this section, strip it from the
7937 output file. This is mostly to handle .rela.bss and
7938 .rela.plt. We must create both sections in
7939 create_dynamic_sections, because they must be created
7940 before the linker maps input sections to output
7941 sections. The linker does that before
7942 adjust_dynamic_symbol is called, and it is that
7943 function which decides whether anything needs to go
7944 into these sections. */
7945 s->flags |= SEC_EXCLUDE;
7946 continue;
7947 }
7948
7949 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7950 continue;
7951
7952 /* Allocate memory for the section contents. We use bfd_zalloc
7953 here in case unused entries are not reclaimed before the
7954 section's contents are written out. This should not happen,
7955 but this way if it does we get a R_PPC64_NONE reloc in .rela
7956 sections instead of garbage.
7957 We also rely on the section contents being zero when writing
7958 the GOT. */
7959 s->contents = bfd_zalloc (dynobj, s->size);
7960 if (s->contents == NULL)
7961 return FALSE;
7962 }
7963
7964 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7965 {
7966 if (!is_ppc64_elf_target (ibfd->xvec))
7967 continue;
7968
7969 s = ppc64_elf_tdata (ibfd)->got;
7970 if (s != NULL && s != htab->got)
7971 {
7972 if (s->size == 0)
7973 s->flags |= SEC_EXCLUDE;
7974 else
7975 {
7976 s->contents = bfd_zalloc (ibfd, s->size);
7977 if (s->contents == NULL)
7978 return FALSE;
7979 }
7980 }
7981 s = ppc64_elf_tdata (ibfd)->relgot;
7982 if (s != NULL)
7983 {
7984 if (s->size == 0)
7985 s->flags |= SEC_EXCLUDE;
7986 else
7987 {
7988 s->contents = bfd_zalloc (ibfd, s->size);
7989 if (s->contents == NULL)
7990 return FALSE;
7991 relocs = TRUE;
7992 s->reloc_count = 0;
7993 }
7994 }
7995 }
7996
7997 if (htab->elf.dynamic_sections_created)
7998 {
7999 /* Add some entries to the .dynamic section. We fill in the
8000 values later, in ppc64_elf_finish_dynamic_sections, but we
8001 must add the entries now so that we get the correct size for
8002 the .dynamic section. The DT_DEBUG entry is filled in by the
8003 dynamic linker and used by the debugger. */
8004 #define add_dynamic_entry(TAG, VAL) \
8005 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8006
8007 if (info->executable)
8008 {
8009 if (!add_dynamic_entry (DT_DEBUG, 0))
8010 return FALSE;
8011 }
8012
8013 if (htab->plt != NULL && htab->plt->size != 0)
8014 {
8015 if (!add_dynamic_entry (DT_PLTGOT, 0)
8016 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8017 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8018 || !add_dynamic_entry (DT_JMPREL, 0)
8019 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8020 return FALSE;
8021 }
8022
8023 if (NO_OPD_RELOCS)
8024 {
8025 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8026 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8027 return FALSE;
8028 }
8029
8030 if (relocs)
8031 {
8032 if (!add_dynamic_entry (DT_RELA, 0)
8033 || !add_dynamic_entry (DT_RELASZ, 0)
8034 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8035 return FALSE;
8036
8037 /* If any dynamic relocs apply to a read-only section,
8038 then we need a DT_TEXTREL entry. */
8039 if ((info->flags & DF_TEXTREL) == 0)
8040 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8041
8042 if ((info->flags & DF_TEXTREL) != 0)
8043 {
8044 if (!add_dynamic_entry (DT_TEXTREL, 0))
8045 return FALSE;
8046 }
8047 }
8048 }
8049 #undef add_dynamic_entry
8050
8051 return TRUE;
8052 }
8053
8054 /* Determine the type of stub needed, if any, for a call. */
8055
8056 static inline enum ppc_stub_type
8057 ppc_type_of_stub (asection *input_sec,
8058 const Elf_Internal_Rela *rel,
8059 struct ppc_link_hash_entry **hash,
8060 bfd_vma destination)
8061 {
8062 struct ppc_link_hash_entry *h = *hash;
8063 bfd_vma location;
8064 bfd_vma branch_offset;
8065 bfd_vma max_branch_offset;
8066 enum elf_ppc64_reloc_type r_type;
8067
8068 if (h != NULL)
8069 {
8070 struct ppc_link_hash_entry *fdh = h;
8071 if (fdh->oh != NULL
8072 && fdh->oh->is_func_descriptor)
8073 fdh = fdh->oh;
8074
8075 if (fdh->elf.dynindx != -1)
8076 {
8077 struct plt_entry *ent;
8078
8079 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8080 if (ent->addend == rel->r_addend
8081 && ent->plt.offset != (bfd_vma) -1)
8082 {
8083 *hash = fdh;
8084 return ppc_stub_plt_call;
8085 }
8086 }
8087
8088 /* Here, we know we don't have a plt entry. If we don't have a
8089 either a defined function descriptor or a defined entry symbol
8090 in a regular object file, then it is pointless trying to make
8091 any other type of stub. */
8092 if (!((fdh->elf.root.type == bfd_link_hash_defined
8093 || fdh->elf.root.type == bfd_link_hash_defweak)
8094 && fdh->elf.root.u.def.section->output_section != NULL)
8095 && !((h->elf.root.type == bfd_link_hash_defined
8096 || h->elf.root.type == bfd_link_hash_defweak)
8097 && h->elf.root.u.def.section->output_section != NULL))
8098 return ppc_stub_none;
8099 }
8100
8101 /* Determine where the call point is. */
8102 location = (input_sec->output_offset
8103 + input_sec->output_section->vma
8104 + rel->r_offset);
8105
8106 branch_offset = destination - location;
8107 r_type = ELF64_R_TYPE (rel->r_info);
8108
8109 /* Determine if a long branch stub is needed. */
8110 max_branch_offset = 1 << 25;
8111 if (r_type != R_PPC64_REL24)
8112 max_branch_offset = 1 << 15;
8113
8114 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8115 /* We need a stub. Figure out whether a long_branch or plt_branch
8116 is needed later. */
8117 return ppc_stub_long_branch;
8118
8119 return ppc_stub_none;
8120 }
8121
8122 /* Build a .plt call stub. */
8123
8124 static inline bfd_byte *
8125 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8126 {
8127 #define PPC_LO(v) ((v) & 0xffff)
8128 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8129 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8130
8131 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8132 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8133 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8134 if (PPC_HA (offset + 8) != PPC_HA (offset))
8135 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8136 offset += 8;
8137 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
8138 if (PPC_HA (offset + 8) != PPC_HA (offset))
8139 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8140 offset += 8;
8141 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8142 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8143 bfd_put_32 (obfd, BCTR, p), p += 4;
8144 return p;
8145 }
8146
8147 static bfd_boolean
8148 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8149 {
8150 struct ppc_stub_hash_entry *stub_entry;
8151 struct ppc_branch_hash_entry *br_entry;
8152 struct bfd_link_info *info;
8153 struct ppc_link_hash_table *htab;
8154 bfd_byte *loc;
8155 bfd_byte *p;
8156 unsigned int indx;
8157 struct plt_entry *ent;
8158 bfd_vma dest, off;
8159 int size;
8160
8161 /* Massage our args to the form they really have. */
8162 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8163 info = in_arg;
8164
8165 htab = ppc_hash_table (info);
8166
8167 /* Make a note of the offset within the stubs for this entry. */
8168 stub_entry->stub_offset = stub_entry->stub_sec->size;
8169 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8170
8171 htab->stub_count[stub_entry->stub_type - 1] += 1;
8172 switch (stub_entry->stub_type)
8173 {
8174 case ppc_stub_long_branch:
8175 case ppc_stub_long_branch_r2off:
8176 /* Branches are relative. This is where we are going to. */
8177 off = dest = (stub_entry->target_value
8178 + stub_entry->target_section->output_offset
8179 + stub_entry->target_section->output_section->vma);
8180
8181 /* And this is where we are coming from. */
8182 off -= (stub_entry->stub_offset
8183 + stub_entry->stub_sec->output_offset
8184 + stub_entry->stub_sec->output_section->vma);
8185
8186 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8187 size = 4;
8188 else
8189 {
8190 bfd_vma r2off;
8191
8192 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8193 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8194 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8195 loc += 4;
8196 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8197 loc += 4;
8198 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8199 loc += 4;
8200 off -= 12;
8201 size = 16;
8202 }
8203 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8204
8205 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8206 {
8207 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8208 stub_entry->root.string);
8209 htab->stub_error = TRUE;
8210 return FALSE;
8211 }
8212
8213 if (info->emitrelocations)
8214 {
8215 Elf_Internal_Rela *relocs, *r;
8216 struct bfd_elf_section_data *elfsec_data;
8217
8218 elfsec_data = elf_section_data (stub_entry->stub_sec);
8219 relocs = elfsec_data->relocs;
8220 if (relocs == NULL)
8221 {
8222 bfd_size_type relsize;
8223 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8224 relocs = bfd_alloc (htab->stub_bfd, relsize);
8225 if (relocs == NULL)
8226 return FALSE;
8227 elfsec_data->relocs = relocs;
8228 elfsec_data->rel_hdr.sh_size = relsize;
8229 elfsec_data->rel_hdr.sh_entsize = 24;
8230 stub_entry->stub_sec->reloc_count = 0;
8231 }
8232 r = relocs + stub_entry->stub_sec->reloc_count;
8233 stub_entry->stub_sec->reloc_count += 1;
8234 r->r_offset = loc - stub_entry->stub_sec->contents;
8235 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8236 r->r_addend = dest;
8237 if (stub_entry->h != NULL)
8238 {
8239 struct elf_link_hash_entry **hashes;
8240 unsigned long symndx;
8241 struct ppc_link_hash_entry *h;
8242
8243 hashes = elf_sym_hashes (htab->stub_bfd);
8244 if (hashes == NULL)
8245 {
8246 bfd_size_type hsize;
8247
8248 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8249 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8250 if (hashes == NULL)
8251 return FALSE;
8252 elf_sym_hashes (htab->stub_bfd) = hashes;
8253 htab->stub_globals = 1;
8254 }
8255 symndx = htab->stub_globals++;
8256 h = stub_entry->h;
8257 hashes[symndx] = &h->elf;
8258 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8259 if (h->oh != NULL && h->oh->is_func)
8260 h = h->oh;
8261 if (h->elf.root.u.def.section != stub_entry->target_section)
8262 /* H is an opd symbol. The addend must be zero. */
8263 r->r_addend = 0;
8264 else
8265 {
8266 off = (h->elf.root.u.def.value
8267 + h->elf.root.u.def.section->output_offset
8268 + h->elf.root.u.def.section->output_section->vma);
8269 r->r_addend -= off;
8270 }
8271 }
8272 }
8273 break;
8274
8275 case ppc_stub_plt_branch:
8276 case ppc_stub_plt_branch_r2off:
8277 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8278 stub_entry->root.string + 9,
8279 FALSE, FALSE);
8280 if (br_entry == NULL)
8281 {
8282 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8283 stub_entry->root.string);
8284 htab->stub_error = TRUE;
8285 return FALSE;
8286 }
8287
8288 off = (stub_entry->target_value
8289 + stub_entry->target_section->output_offset
8290 + stub_entry->target_section->output_section->vma);
8291
8292 bfd_put_64 (htab->brlt->owner, off,
8293 htab->brlt->contents + br_entry->offset);
8294
8295 if (htab->relbrlt != NULL)
8296 {
8297 /* Create a reloc for the branch lookup table entry. */
8298 Elf_Internal_Rela rela;
8299 bfd_byte *rl;
8300
8301 rela.r_offset = (br_entry->offset
8302 + htab->brlt->output_offset
8303 + htab->brlt->output_section->vma);
8304 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8305 rela.r_addend = off;
8306
8307 rl = htab->relbrlt->contents;
8308 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8309 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8310 }
8311
8312 off = (br_entry->offset
8313 + htab->brlt->output_offset
8314 + htab->brlt->output_section->vma
8315 - elf_gp (htab->brlt->output_section->owner)
8316 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8317
8318 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8319 {
8320 (*_bfd_error_handler)
8321 (_("linkage table error against `%s'"),
8322 stub_entry->root.string);
8323 bfd_set_error (bfd_error_bad_value);
8324 htab->stub_error = TRUE;
8325 return FALSE;
8326 }
8327
8328 indx = off;
8329 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8330 {
8331 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8332 loc += 4;
8333 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8334 size = 16;
8335 }
8336 else
8337 {
8338 bfd_vma r2off;
8339
8340 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8341 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8342 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8343 loc += 4;
8344 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8345 loc += 4;
8346 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8347 loc += 4;
8348 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8349 loc += 4;
8350 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8351 size = 28;
8352 }
8353 loc += 4;
8354 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8355 loc += 4;
8356 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8357 break;
8358
8359 case ppc_stub_plt_call:
8360 /* Do the best we can for shared libraries built without
8361 exporting ".foo" for each "foo". This can happen when symbol
8362 versioning scripts strip all bar a subset of symbols. */
8363 if (stub_entry->h->oh != NULL
8364 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8365 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8366 {
8367 /* Point the symbol at the stub. There may be multiple stubs,
8368 we don't really care; The main thing is to make this sym
8369 defined somewhere. Maybe defining the symbol in the stub
8370 section is a silly idea. If we didn't do this, htab->top_id
8371 could disappear. */
8372 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8373 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8374 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8375 }
8376
8377 /* Now build the stub. */
8378 off = (bfd_vma) -1;
8379 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8380 if (ent->addend == stub_entry->addend)
8381 {
8382 off = ent->plt.offset;
8383 break;
8384 }
8385 if (off >= (bfd_vma) -2)
8386 abort ();
8387
8388 off &= ~ (bfd_vma) 1;
8389 off += (htab->plt->output_offset
8390 + htab->plt->output_section->vma
8391 - elf_gp (htab->plt->output_section->owner)
8392 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8393
8394 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8395 {
8396 (*_bfd_error_handler)
8397 (_("linkage table error against `%s'"),
8398 stub_entry->h->elf.root.root.string);
8399 bfd_set_error (bfd_error_bad_value);
8400 htab->stub_error = TRUE;
8401 return FALSE;
8402 }
8403
8404 p = build_plt_stub (htab->stub_bfd, loc, off);
8405 size = p - loc;
8406 break;
8407
8408 default:
8409 BFD_FAIL ();
8410 return FALSE;
8411 }
8412
8413 stub_entry->stub_sec->size += size;
8414
8415 if (htab->emit_stub_syms)
8416 {
8417 struct elf_link_hash_entry *h;
8418 size_t len1, len2;
8419 char *name;
8420 const char *const stub_str[] = { "long_branch",
8421 "long_branch_r2off",
8422 "plt_branch",
8423 "plt_branch_r2off",
8424 "plt_call" };
8425
8426 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8427 len2 = strlen (stub_entry->root.string);
8428 name = bfd_malloc (len1 + len2 + 2);
8429 if (name == NULL)
8430 return FALSE;
8431 memcpy (name, stub_entry->root.string, 9);
8432 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8433 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8434 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8435 if (h == NULL)
8436 return FALSE;
8437 if (h->root.type == bfd_link_hash_new)
8438 {
8439 h->root.type = bfd_link_hash_defined;
8440 h->root.u.def.section = stub_entry->stub_sec;
8441 h->root.u.def.value = stub_entry->stub_offset;
8442 h->ref_regular = 1;
8443 h->def_regular = 1;
8444 h->ref_regular_nonweak = 1;
8445 h->forced_local = 1;
8446 h->non_elf = 0;
8447 }
8448 }
8449
8450 return TRUE;
8451 }
8452
8453 /* As above, but don't actually build the stub. Just bump offset so
8454 we know stub section sizes, and select plt_branch stubs where
8455 long_branch stubs won't do. */
8456
8457 static bfd_boolean
8458 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8459 {
8460 struct ppc_stub_hash_entry *stub_entry;
8461 struct bfd_link_info *info;
8462 struct ppc_link_hash_table *htab;
8463 bfd_vma off;
8464 int size;
8465
8466 /* Massage our args to the form they really have. */
8467 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8468 info = in_arg;
8469
8470 htab = ppc_hash_table (info);
8471
8472 if (stub_entry->stub_type == ppc_stub_plt_call)
8473 {
8474 struct plt_entry *ent;
8475 off = (bfd_vma) -1;
8476 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8477 if (ent->addend == stub_entry->addend)
8478 {
8479 off = ent->plt.offset & ~(bfd_vma) 1;
8480 break;
8481 }
8482 if (off >= (bfd_vma) -2)
8483 abort ();
8484 off += (htab->plt->output_offset
8485 + htab->plt->output_section->vma
8486 - elf_gp (htab->plt->output_section->owner)
8487 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8488
8489 size = PLT_CALL_STUB_SIZE;
8490 if (PPC_HA (off + 16) != PPC_HA (off))
8491 size += 4;
8492 }
8493 else
8494 {
8495 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8496 variants. */
8497 off = (stub_entry->target_value
8498 + stub_entry->target_section->output_offset
8499 + stub_entry->target_section->output_section->vma);
8500 off -= (stub_entry->stub_sec->size
8501 + stub_entry->stub_sec->output_offset
8502 + stub_entry->stub_sec->output_section->vma);
8503
8504 /* Reset the stub type from the plt variant in case we now
8505 can reach with a shorter stub. */
8506 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8507 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8508
8509 size = 4;
8510 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8511 {
8512 off -= 12;
8513 size = 16;
8514 }
8515
8516 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8517 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8518 {
8519 struct ppc_branch_hash_entry *br_entry;
8520
8521 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8522 stub_entry->root.string + 9,
8523 TRUE, FALSE);
8524 if (br_entry == NULL)
8525 {
8526 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8527 stub_entry->root.string);
8528 htab->stub_error = TRUE;
8529 return FALSE;
8530 }
8531
8532 if (br_entry->iter != htab->stub_iteration)
8533 {
8534 br_entry->iter = htab->stub_iteration;
8535 br_entry->offset = htab->brlt->size;
8536 htab->brlt->size += 8;
8537
8538 if (htab->relbrlt != NULL)
8539 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8540 }
8541
8542 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8543 size = 16;
8544 if (stub_entry->stub_type != ppc_stub_plt_branch)
8545 size = 28;
8546 }
8547
8548 if (info->emitrelocations
8549 && (stub_entry->stub_type == ppc_stub_long_branch
8550 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8551 stub_entry->stub_sec->reloc_count += 1;
8552 }
8553
8554 stub_entry->stub_sec->size += size;
8555 return TRUE;
8556 }
8557
8558 /* Set up various things so that we can make a list of input sections
8559 for each output section included in the link. Returns -1 on error,
8560 0 when no stubs will be needed, and 1 on success. */
8561
8562 int
8563 ppc64_elf_setup_section_lists (bfd *output_bfd,
8564 struct bfd_link_info *info,
8565 int no_multi_toc)
8566 {
8567 bfd *input_bfd;
8568 int top_id, top_index, id;
8569 asection *section;
8570 asection **input_list;
8571 bfd_size_type amt;
8572 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8573
8574 htab->no_multi_toc = no_multi_toc;
8575
8576 if (htab->brlt == NULL)
8577 return 0;
8578
8579 /* Find the top input section id. */
8580 for (input_bfd = info->input_bfds, top_id = 3;
8581 input_bfd != NULL;
8582 input_bfd = input_bfd->link_next)
8583 {
8584 for (section = input_bfd->sections;
8585 section != NULL;
8586 section = section->next)
8587 {
8588 if (top_id < section->id)
8589 top_id = section->id;
8590 }
8591 }
8592
8593 htab->top_id = top_id;
8594 amt = sizeof (struct map_stub) * (top_id + 1);
8595 htab->stub_group = bfd_zmalloc (amt);
8596 if (htab->stub_group == NULL)
8597 return -1;
8598
8599 /* Set toc_off for com, und, abs and ind sections. */
8600 for (id = 0; id < 3; id++)
8601 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8602
8603 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8604
8605 /* We can't use output_bfd->section_count here to find the top output
8606 section index as some sections may have been removed, and
8607 strip_excluded_output_sections doesn't renumber the indices. */
8608 for (section = output_bfd->sections, top_index = 0;
8609 section != NULL;
8610 section = section->next)
8611 {
8612 if (top_index < section->index)
8613 top_index = section->index;
8614 }
8615
8616 htab->top_index = top_index;
8617 amt = sizeof (asection *) * (top_index + 1);
8618 input_list = bfd_zmalloc (amt);
8619 htab->input_list = input_list;
8620 if (input_list == NULL)
8621 return -1;
8622
8623 return 1;
8624 }
8625
8626 /* The linker repeatedly calls this function for each TOC input section
8627 and linker generated GOT section. Group input bfds such that the toc
8628 within a group is less than 64k in size. Will break with cute linker
8629 scripts that play games with dot in the output toc section. */
8630
8631 void
8632 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8633 {
8634 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8635
8636 if (!htab->no_multi_toc)
8637 {
8638 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8639 bfd_vma off = addr - htab->toc_curr;
8640
8641 if (off + isec->size > 0x10000)
8642 htab->toc_curr = addr;
8643
8644 elf_gp (isec->owner) = (htab->toc_curr
8645 - elf_gp (isec->output_section->owner)
8646 + TOC_BASE_OFF);
8647 }
8648 }
8649
8650 /* Called after the last call to the above function. */
8651
8652 void
8653 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8654 {
8655 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8656
8657 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8658
8659 /* toc_curr tracks the TOC offset used for code sections below in
8660 ppc64_elf_next_input_section. Start off at 0x8000. */
8661 htab->toc_curr = TOC_BASE_OFF;
8662 }
8663
8664 /* No toc references were found in ISEC. If the code in ISEC makes no
8665 calls, then there's no need to use toc adjusting stubs when branching
8666 into ISEC. Actually, indirect calls from ISEC are OK as they will
8667 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8668 needed, and 2 if a cyclical call-graph was found but no other reason
8669 for a stub was detected. If called from the top level, a return of
8670 2 means the same as a return of 0. */
8671
8672 static int
8673 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8674 {
8675 Elf_Internal_Rela *relstart, *rel;
8676 Elf_Internal_Sym *local_syms;
8677 int ret;
8678 struct ppc_link_hash_table *htab;
8679
8680 /* We know none of our code bearing sections will need toc stubs. */
8681 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8682 return 0;
8683
8684 if (isec->size == 0)
8685 return 0;
8686
8687 if (isec->output_section == NULL)
8688 return 0;
8689
8690 /* Hack for linux kernel. .fixup contains branches, but only back to
8691 the function that hit an exception. */
8692 if (strcmp (isec->name, ".fixup") == 0)
8693 return 0;
8694
8695 if (isec->reloc_count == 0)
8696 return 0;
8697
8698 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8699 info->keep_memory);
8700 if (relstart == NULL)
8701 return -1;
8702
8703 /* Look for branches to outside of this section. */
8704 local_syms = NULL;
8705 ret = 0;
8706 htab = ppc_hash_table (info);
8707 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8708 {
8709 enum elf_ppc64_reloc_type r_type;
8710 unsigned long r_symndx;
8711 struct elf_link_hash_entry *h;
8712 Elf_Internal_Sym *sym;
8713 asection *sym_sec;
8714 long *opd_adjust;
8715 bfd_vma sym_value;
8716 bfd_vma dest;
8717
8718 r_type = ELF64_R_TYPE (rel->r_info);
8719 if (r_type != R_PPC64_REL24
8720 && r_type != R_PPC64_REL14
8721 && r_type != R_PPC64_REL14_BRTAKEN
8722 && r_type != R_PPC64_REL14_BRNTAKEN)
8723 continue;
8724
8725 r_symndx = ELF64_R_SYM (rel->r_info);
8726 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8727 isec->owner))
8728 {
8729 ret = -1;
8730 break;
8731 }
8732
8733 /* Calls to dynamic lib functions go through a plt call stub
8734 that uses r2. Branches to undefined symbols might be a call
8735 using old-style dot symbols that can be satisfied by a plt
8736 call into a new-style dynamic library. */
8737 if (sym_sec == NULL)
8738 {
8739 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8740 if (eh != NULL
8741 && eh->oh != NULL
8742 && eh->oh->elf.plt.plist != NULL)
8743 {
8744 ret = 1;
8745 break;
8746 }
8747
8748 /* Ignore other undefined symbols. */
8749 continue;
8750 }
8751
8752 /* Assume branches to other sections not included in the link need
8753 stubs too, to cover -R and absolute syms. */
8754 if (sym_sec->output_section == NULL)
8755 {
8756 ret = 1;
8757 break;
8758 }
8759
8760 if (h == NULL)
8761 sym_value = sym->st_value;
8762 else
8763 {
8764 if (h->root.type != bfd_link_hash_defined
8765 && h->root.type != bfd_link_hash_defweak)
8766 abort ();
8767 sym_value = h->root.u.def.value;
8768 }
8769 sym_value += rel->r_addend;
8770
8771 /* If this branch reloc uses an opd sym, find the code section. */
8772 opd_adjust = get_opd_info (sym_sec);
8773 if (opd_adjust != NULL)
8774 {
8775 if (h == NULL)
8776 {
8777 long adjust;
8778
8779 adjust = opd_adjust[sym->st_value / 8];
8780 if (adjust == -1)
8781 /* Assume deleted functions won't ever be called. */
8782 continue;
8783 sym_value += adjust;
8784 }
8785
8786 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8787 if (dest == (bfd_vma) -1)
8788 continue;
8789 }
8790 else
8791 dest = (sym_value
8792 + sym_sec->output_offset
8793 + sym_sec->output_section->vma);
8794
8795 /* Ignore branch to self. */
8796 if (sym_sec == isec)
8797 continue;
8798
8799 /* If the called function uses the toc, we need a stub. */
8800 if (sym_sec->has_toc_reloc
8801 || sym_sec->makes_toc_func_call)
8802 {
8803 ret = 1;
8804 break;
8805 }
8806
8807 /* Assume any branch that needs a long branch stub might in fact
8808 need a plt_branch stub. A plt_branch stub uses r2. */
8809 else if (dest - (isec->output_offset
8810 + isec->output_section->vma
8811 + rel->r_offset) + (1 << 25) >= (2 << 25))
8812 {
8813 ret = 1;
8814 break;
8815 }
8816
8817 /* If calling back to a section in the process of being tested, we
8818 can't say for sure that no toc adjusting stubs are needed, so
8819 don't return zero. */
8820 else if (sym_sec->call_check_in_progress)
8821 ret = 2;
8822
8823 /* Branches to another section that itself doesn't have any TOC
8824 references are OK. Recursively call ourselves to check. */
8825 else if (sym_sec->id <= htab->top_id
8826 && htab->stub_group[sym_sec->id].toc_off == 0)
8827 {
8828 int recur;
8829
8830 /* Mark current section as indeterminate, so that other
8831 sections that call back to current won't be marked as
8832 known. */
8833 isec->call_check_in_progress = 1;
8834 recur = toc_adjusting_stub_needed (info, sym_sec);
8835 isec->call_check_in_progress = 0;
8836
8837 if (recur < 0)
8838 {
8839 /* An error. Exit. */
8840 ret = -1;
8841 break;
8842 }
8843 else if (recur <= 1)
8844 {
8845 /* Known result. Mark as checked and set section flag. */
8846 htab->stub_group[sym_sec->id].toc_off = 1;
8847 if (recur != 0)
8848 {
8849 sym_sec->makes_toc_func_call = 1;
8850 ret = 1;
8851 break;
8852 }
8853 }
8854 else
8855 {
8856 /* Unknown result. Continue checking. */
8857 ret = 2;
8858 }
8859 }
8860 }
8861
8862 if (local_syms != NULL
8863 && (elf_tdata (isec->owner)->symtab_hdr.contents
8864 != (unsigned char *) local_syms))
8865 free (local_syms);
8866 if (elf_section_data (isec)->relocs != relstart)
8867 free (relstart);
8868
8869 return ret;
8870 }
8871
8872 /* The linker repeatedly calls this function for each input section,
8873 in the order that input sections are linked into output sections.
8874 Build lists of input sections to determine groupings between which
8875 we may insert linker stubs. */
8876
8877 bfd_boolean
8878 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8879 {
8880 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8881
8882 if ((isec->output_section->flags & SEC_CODE) != 0
8883 && isec->output_section->index <= htab->top_index)
8884 {
8885 asection **list = htab->input_list + isec->output_section->index;
8886 /* Steal the link_sec pointer for our list. */
8887 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8888 /* This happens to make the list in reverse order,
8889 which is what we want. */
8890 PREV_SEC (isec) = *list;
8891 *list = isec;
8892 }
8893
8894 if (htab->multi_toc_needed)
8895 {
8896 /* If a code section has a function that uses the TOC then we need
8897 to use the right TOC (obviously). Also, make sure that .opd gets
8898 the correct TOC value for R_PPC64_TOC relocs that don't have or
8899 can't find their function symbol (shouldn't ever happen now). */
8900 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8901 {
8902 if (elf_gp (isec->owner) != 0)
8903 htab->toc_curr = elf_gp (isec->owner);
8904 }
8905 else if (htab->stub_group[isec->id].toc_off == 0)
8906 {
8907 int ret = toc_adjusting_stub_needed (info, isec);
8908 if (ret < 0)
8909 return FALSE;
8910 else
8911 isec->makes_toc_func_call = ret & 1;
8912 }
8913 }
8914
8915 /* Functions that don't use the TOC can belong in any TOC group.
8916 Use the last TOC base. This happens to make _init and _fini
8917 pasting work. */
8918 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8919 return TRUE;
8920 }
8921
8922 /* See whether we can group stub sections together. Grouping stub
8923 sections may result in fewer stubs. More importantly, we need to
8924 put all .init* and .fini* stubs at the beginning of the .init or
8925 .fini output sections respectively, because glibc splits the
8926 _init and _fini functions into multiple parts. Putting a stub in
8927 the middle of a function is not a good idea. */
8928
8929 static void
8930 group_sections (struct ppc_link_hash_table *htab,
8931 bfd_size_type stub_group_size,
8932 bfd_boolean stubs_always_before_branch)
8933 {
8934 asection **list = htab->input_list + htab->top_index;
8935 do
8936 {
8937 asection *tail = *list;
8938 while (tail != NULL)
8939 {
8940 asection *curr;
8941 asection *prev;
8942 bfd_size_type total;
8943 bfd_boolean big_sec;
8944 bfd_vma curr_toc;
8945
8946 curr = tail;
8947 total = tail->size;
8948 big_sec = total > stub_group_size;
8949 if (big_sec)
8950 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
8951 tail->owner, tail);
8952 curr_toc = htab->stub_group[tail->id].toc_off;
8953
8954 while ((prev = PREV_SEC (curr)) != NULL
8955 && ((total += curr->output_offset - prev->output_offset)
8956 < stub_group_size)
8957 && htab->stub_group[prev->id].toc_off == curr_toc)
8958 curr = prev;
8959
8960 /* OK, the size from the start of CURR to the end is less
8961 than stub_group_size and thus can be handled by one stub
8962 section. (or the tail section is itself larger than
8963 stub_group_size, in which case we may be toast.) We
8964 should really be keeping track of the total size of stubs
8965 added here, as stubs contribute to the final output
8966 section size. That's a little tricky, and this way will
8967 only break if stubs added make the total size more than
8968 2^25, ie. for the default stub_group_size, if stubs total
8969 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8970 do
8971 {
8972 prev = PREV_SEC (tail);
8973 /* Set up this stub group. */
8974 htab->stub_group[tail->id].link_sec = curr;
8975 }
8976 while (tail != curr && (tail = prev) != NULL);
8977
8978 /* But wait, there's more! Input sections up to stub_group_size
8979 bytes before the stub section can be handled by it too.
8980 Don't do this if we have a really large section after the
8981 stubs, as adding more stubs increases the chance that
8982 branches may not reach into the stub section. */
8983 if (!stubs_always_before_branch && !big_sec)
8984 {
8985 total = 0;
8986 while (prev != NULL
8987 && ((total += tail->output_offset - prev->output_offset)
8988 < stub_group_size)
8989 && htab->stub_group[prev->id].toc_off == curr_toc)
8990 {
8991 tail = prev;
8992 prev = PREV_SEC (tail);
8993 htab->stub_group[tail->id].link_sec = curr;
8994 }
8995 }
8996 tail = prev;
8997 }
8998 }
8999 while (list-- != htab->input_list);
9000 free (htab->input_list);
9001 #undef PREV_SEC
9002 }
9003
9004 /* Determine and set the size of the stub section for a final link.
9005
9006 The basic idea here is to examine all the relocations looking for
9007 PC-relative calls to a target that is unreachable with a "bl"
9008 instruction. */
9009
9010 bfd_boolean
9011 ppc64_elf_size_stubs (bfd *output_bfd,
9012 struct bfd_link_info *info,
9013 bfd_signed_vma group_size,
9014 asection *(*add_stub_section) (const char *, asection *),
9015 void (*layout_sections_again) (void))
9016 {
9017 bfd_size_type stub_group_size;
9018 bfd_boolean stubs_always_before_branch;
9019 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9020
9021 /* Stash our params away. */
9022 htab->add_stub_section = add_stub_section;
9023 htab->layout_sections_again = layout_sections_again;
9024 stubs_always_before_branch = group_size < 0;
9025 if (group_size < 0)
9026 stub_group_size = -group_size;
9027 else
9028 stub_group_size = group_size;
9029 if (stub_group_size == 1)
9030 {
9031 /* Default values. */
9032 if (stubs_always_before_branch)
9033 {
9034 stub_group_size = 0x1e00000;
9035 if (htab->has_14bit_branch)
9036 stub_group_size = 0x7800;
9037 }
9038 else
9039 {
9040 stub_group_size = 0x1c00000;
9041 if (htab->has_14bit_branch)
9042 stub_group_size = 0x7000;
9043 }
9044 }
9045
9046 group_sections (htab, stub_group_size, stubs_always_before_branch);
9047
9048 while (1)
9049 {
9050 bfd *input_bfd;
9051 unsigned int bfd_indx;
9052 asection *stub_sec;
9053
9054 htab->stub_iteration += 1;
9055
9056 for (input_bfd = info->input_bfds, bfd_indx = 0;
9057 input_bfd != NULL;
9058 input_bfd = input_bfd->link_next, bfd_indx++)
9059 {
9060 Elf_Internal_Shdr *symtab_hdr;
9061 asection *section;
9062 Elf_Internal_Sym *local_syms = NULL;
9063
9064 if (!is_ppc64_elf_target (input_bfd->xvec))
9065 continue;
9066
9067 /* We'll need the symbol table in a second. */
9068 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9069 if (symtab_hdr->sh_info == 0)
9070 continue;
9071
9072 /* Walk over each section attached to the input bfd. */
9073 for (section = input_bfd->sections;
9074 section != NULL;
9075 section = section->next)
9076 {
9077 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9078
9079 /* If there aren't any relocs, then there's nothing more
9080 to do. */
9081 if ((section->flags & SEC_RELOC) == 0
9082 || (section->flags & SEC_ALLOC) == 0
9083 || (section->flags & SEC_LOAD) == 0
9084 || (section->flags & SEC_CODE) == 0
9085 || section->reloc_count == 0)
9086 continue;
9087
9088 /* If this section is a link-once section that will be
9089 discarded, then don't create any stubs. */
9090 if (section->output_section == NULL
9091 || section->output_section->owner != output_bfd)
9092 continue;
9093
9094 /* Get the relocs. */
9095 internal_relocs
9096 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9097 info->keep_memory);
9098 if (internal_relocs == NULL)
9099 goto error_ret_free_local;
9100
9101 /* Now examine each relocation. */
9102 irela = internal_relocs;
9103 irelaend = irela + section->reloc_count;
9104 for (; irela < irelaend; irela++)
9105 {
9106 enum elf_ppc64_reloc_type r_type;
9107 unsigned int r_indx;
9108 enum ppc_stub_type stub_type;
9109 struct ppc_stub_hash_entry *stub_entry;
9110 asection *sym_sec, *code_sec;
9111 bfd_vma sym_value;
9112 bfd_vma destination;
9113 bfd_boolean ok_dest;
9114 struct ppc_link_hash_entry *hash;
9115 struct ppc_link_hash_entry *fdh;
9116 struct elf_link_hash_entry *h;
9117 Elf_Internal_Sym *sym;
9118 char *stub_name;
9119 const asection *id_sec;
9120 long *opd_adjust;
9121
9122 r_type = ELF64_R_TYPE (irela->r_info);
9123 r_indx = ELF64_R_SYM (irela->r_info);
9124
9125 if (r_type >= R_PPC64_max)
9126 {
9127 bfd_set_error (bfd_error_bad_value);
9128 goto error_ret_free_internal;
9129 }
9130
9131 /* Only look for stubs on branch instructions. */
9132 if (r_type != R_PPC64_REL24
9133 && r_type != R_PPC64_REL14
9134 && r_type != R_PPC64_REL14_BRTAKEN
9135 && r_type != R_PPC64_REL14_BRNTAKEN)
9136 continue;
9137
9138 /* Now determine the call target, its name, value,
9139 section. */
9140 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9141 r_indx, input_bfd))
9142 goto error_ret_free_internal;
9143 hash = (struct ppc_link_hash_entry *) h;
9144
9145 ok_dest = FALSE;
9146 fdh = NULL;
9147 sym_value = 0;
9148 if (hash == NULL)
9149 {
9150 sym_value = sym->st_value;
9151 ok_dest = TRUE;
9152 }
9153 else if (hash->elf.root.type == bfd_link_hash_defined
9154 || hash->elf.root.type == bfd_link_hash_defweak)
9155 {
9156 sym_value = hash->elf.root.u.def.value;
9157 if (sym_sec->output_section != NULL)
9158 ok_dest = TRUE;
9159 }
9160 else if (hash->elf.root.type == bfd_link_hash_undefweak
9161 || hash->elf.root.type == bfd_link_hash_undefined)
9162 {
9163 /* Recognise an old ABI func code entry sym, and
9164 use the func descriptor sym instead if it is
9165 defined. */
9166 if (hash->elf.root.root.string[0] == '.'
9167 && (fdh = get_fdh (hash, htab)) != NULL)
9168 {
9169 if (fdh->elf.root.type == bfd_link_hash_defined
9170 || fdh->elf.root.type == bfd_link_hash_defweak)
9171 {
9172 sym_sec = fdh->elf.root.u.def.section;
9173 sym_value = fdh->elf.root.u.def.value;
9174 if (sym_sec->output_section != NULL)
9175 ok_dest = TRUE;
9176 }
9177 else
9178 fdh = NULL;
9179 }
9180 }
9181 else
9182 {
9183 bfd_set_error (bfd_error_bad_value);
9184 goto error_ret_free_internal;
9185 }
9186
9187 destination = 0;
9188 if (ok_dest)
9189 {
9190 sym_value += irela->r_addend;
9191 destination = (sym_value
9192 + sym_sec->output_offset
9193 + sym_sec->output_section->vma);
9194 }
9195
9196 code_sec = sym_sec;
9197 opd_adjust = get_opd_info (sym_sec);
9198 if (opd_adjust != NULL)
9199 {
9200 bfd_vma dest;
9201
9202 if (hash == NULL)
9203 {
9204 long adjust = opd_adjust[sym_value / 8];
9205 if (adjust == -1)
9206 continue;
9207 sym_value += adjust;
9208 }
9209 dest = opd_entry_value (sym_sec, sym_value,
9210 &code_sec, &sym_value);
9211 if (dest != (bfd_vma) -1)
9212 {
9213 destination = dest;
9214 if (fdh != NULL)
9215 {
9216 /* Fixup old ABI sym to point at code
9217 entry. */
9218 hash->elf.root.type = bfd_link_hash_defweak;
9219 hash->elf.root.u.def.section = code_sec;
9220 hash->elf.root.u.def.value = sym_value;
9221 }
9222 }
9223 }
9224
9225 /* Determine what (if any) linker stub is needed. */
9226 stub_type = ppc_type_of_stub (section, irela, &hash,
9227 destination);
9228
9229 if (stub_type != ppc_stub_plt_call)
9230 {
9231 /* Check whether we need a TOC adjusting stub.
9232 Since the linker pastes together pieces from
9233 different object files when creating the
9234 _init and _fini functions, it may be that a
9235 call to what looks like a local sym is in
9236 fact a call needing a TOC adjustment. */
9237 if (code_sec != NULL
9238 && code_sec->output_section != NULL
9239 && (htab->stub_group[code_sec->id].toc_off
9240 != htab->stub_group[section->id].toc_off)
9241 && (code_sec->has_toc_reloc
9242 || code_sec->makes_toc_func_call))
9243 stub_type = ppc_stub_long_branch_r2off;
9244 }
9245
9246 if (stub_type == ppc_stub_none)
9247 continue;
9248
9249 /* __tls_get_addr calls might be eliminated. */
9250 if (stub_type != ppc_stub_plt_call
9251 && hash != NULL
9252 && (hash == htab->tls_get_addr
9253 || hash == htab->tls_get_addr_fd)
9254 && section->has_tls_reloc
9255 && irela != internal_relocs)
9256 {
9257 /* Get tls info. */
9258 char *tls_mask;
9259
9260 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9261 irela - 1, input_bfd))
9262 goto error_ret_free_internal;
9263 if (*tls_mask != 0)
9264 continue;
9265 }
9266
9267 /* Support for grouping stub sections. */
9268 id_sec = htab->stub_group[section->id].link_sec;
9269
9270 /* Get the name of this stub. */
9271 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9272 if (!stub_name)
9273 goto error_ret_free_internal;
9274
9275 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9276 stub_name, FALSE, FALSE);
9277 if (stub_entry != NULL)
9278 {
9279 /* The proper stub has already been created. */
9280 free (stub_name);
9281 continue;
9282 }
9283
9284 stub_entry = ppc_add_stub (stub_name, section, htab);
9285 if (stub_entry == NULL)
9286 {
9287 free (stub_name);
9288 error_ret_free_internal:
9289 if (elf_section_data (section)->relocs == NULL)
9290 free (internal_relocs);
9291 error_ret_free_local:
9292 if (local_syms != NULL
9293 && (symtab_hdr->contents
9294 != (unsigned char *) local_syms))
9295 free (local_syms);
9296 return FALSE;
9297 }
9298
9299 stub_entry->stub_type = stub_type;
9300 stub_entry->target_value = sym_value;
9301 stub_entry->target_section = code_sec;
9302 stub_entry->h = hash;
9303 stub_entry->addend = irela->r_addend;
9304
9305 if (stub_entry->h != NULL)
9306 htab->stub_globals += 1;
9307 }
9308
9309 /* We're done with the internal relocs, free them. */
9310 if (elf_section_data (section)->relocs != internal_relocs)
9311 free (internal_relocs);
9312 }
9313
9314 if (local_syms != NULL
9315 && symtab_hdr->contents != (unsigned char *) local_syms)
9316 {
9317 if (!info->keep_memory)
9318 free (local_syms);
9319 else
9320 symtab_hdr->contents = (unsigned char *) local_syms;
9321 }
9322 }
9323
9324 /* We may have added some stubs. Find out the new size of the
9325 stub sections. */
9326 for (stub_sec = htab->stub_bfd->sections;
9327 stub_sec != NULL;
9328 stub_sec = stub_sec->next)
9329 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9330 {
9331 stub_sec->rawsize = stub_sec->size;
9332 stub_sec->size = 0;
9333 stub_sec->reloc_count = 0;
9334 }
9335
9336 htab->brlt->size = 0;
9337 if (htab->relbrlt != NULL)
9338 htab->relbrlt->size = 0;
9339
9340 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9341
9342 for (stub_sec = htab->stub_bfd->sections;
9343 stub_sec != NULL;
9344 stub_sec = stub_sec->next)
9345 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9346 && stub_sec->rawsize != stub_sec->size)
9347 break;
9348
9349 /* Exit from this loop when no stubs have been added, and no stubs
9350 have changed size. */
9351 if (stub_sec == NULL)
9352 break;
9353
9354 /* Ask the linker to do its stuff. */
9355 (*htab->layout_sections_again) ();
9356 }
9357
9358 /* It would be nice to strip htab->brlt from the output if the
9359 section is empty, but it's too late. If we strip sections here,
9360 the dynamic symbol table is corrupted since the section symbol
9361 for the stripped section isn't written. */
9362
9363 return TRUE;
9364 }
9365
9366 /* Called after we have determined section placement. If sections
9367 move, we'll be called again. Provide a value for TOCstart. */
9368
9369 bfd_vma
9370 ppc64_elf_toc (bfd *obfd)
9371 {
9372 asection *s;
9373 bfd_vma TOCstart;
9374
9375 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9376 order. The TOC starts where the first of these sections starts. */
9377 s = bfd_get_section_by_name (obfd, ".got");
9378 if (s == NULL)
9379 s = bfd_get_section_by_name (obfd, ".toc");
9380 if (s == NULL)
9381 s = bfd_get_section_by_name (obfd, ".tocbss");
9382 if (s == NULL)
9383 s = bfd_get_section_by_name (obfd, ".plt");
9384 if (s == NULL)
9385 {
9386 /* This may happen for
9387 o references to TOC base (SYM@toc / TOC[tc0]) without a
9388 .toc directive
9389 o bad linker script
9390 o --gc-sections and empty TOC sections
9391
9392 FIXME: Warn user? */
9393
9394 /* Look for a likely section. We probably won't even be
9395 using TOCstart. */
9396 for (s = obfd->sections; s != NULL; s = s->next)
9397 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9398 == (SEC_ALLOC | SEC_SMALL_DATA))
9399 break;
9400 if (s == NULL)
9401 for (s = obfd->sections; s != NULL; s = s->next)
9402 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9403 == (SEC_ALLOC | SEC_SMALL_DATA))
9404 break;
9405 if (s == NULL)
9406 for (s = obfd->sections; s != NULL; s = s->next)
9407 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9408 break;
9409 if (s == NULL)
9410 for (s = obfd->sections; s != NULL; s = s->next)
9411 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9412 break;
9413 }
9414
9415 TOCstart = 0;
9416 if (s != NULL)
9417 TOCstart = s->output_section->vma + s->output_offset;
9418
9419 return TOCstart;
9420 }
9421
9422 /* Build all the stubs associated with the current output file.
9423 The stubs are kept in a hash table attached to the main linker
9424 hash table. This function is called via gldelf64ppc_finish. */
9425
9426 bfd_boolean
9427 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9428 struct bfd_link_info *info,
9429 char **stats)
9430 {
9431 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9432 asection *stub_sec;
9433 bfd_byte *p;
9434 int stub_sec_count = 0;
9435
9436 htab->emit_stub_syms = emit_stub_syms;
9437
9438 /* Allocate memory to hold the linker stubs. */
9439 for (stub_sec = htab->stub_bfd->sections;
9440 stub_sec != NULL;
9441 stub_sec = stub_sec->next)
9442 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9443 && stub_sec->size != 0)
9444 {
9445 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9446 if (stub_sec->contents == NULL)
9447 return FALSE;
9448 /* We want to check that built size is the same as calculated
9449 size. rawsize is a convenient location to use. */
9450 stub_sec->rawsize = stub_sec->size;
9451 stub_sec->size = 0;
9452 }
9453
9454 if (htab->plt != NULL)
9455 {
9456 unsigned int indx;
9457 bfd_vma plt0;
9458
9459 /* Build the .glink plt call stub. */
9460 if (htab->emit_stub_syms)
9461 {
9462 struct elf_link_hash_entry *h;
9463 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9464 if (h == NULL)
9465 return FALSE;
9466 if (h->root.type == bfd_link_hash_new)
9467 {
9468 h->root.type = bfd_link_hash_defined;
9469 h->root.u.def.section = htab->glink;
9470 h->root.u.def.value = 8;
9471 h->ref_regular = 1;
9472 h->def_regular = 1;
9473 h->ref_regular_nonweak = 1;
9474 h->forced_local = 1;
9475 h->non_elf = 0;
9476 }
9477 }
9478 p = htab->glink->contents;
9479 plt0 = (htab->plt->output_section->vma
9480 + htab->plt->output_offset
9481 - (htab->glink->output_section->vma
9482 + htab->glink->output_offset
9483 + 16));
9484 bfd_put_64 (htab->glink->owner, plt0, p);
9485 p += 8;
9486 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9487 p += 4;
9488 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9489 p += 4;
9490 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9491 p += 4;
9492 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9493 p += 4;
9494 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9495 p += 4;
9496 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9497 p += 4;
9498 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9499 p += 4;
9500 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9501 p += 4;
9502 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9503 p += 4;
9504 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9505 p += 4;
9506 bfd_put_32 (htab->glink->owner, BCTR, p);
9507 p += 4;
9508 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9509 {
9510 bfd_put_32 (htab->glink->owner, NOP, p);
9511 p += 4;
9512 }
9513
9514 /* Build the .glink lazy link call stubs. */
9515 indx = 0;
9516 while (p < htab->glink->contents + htab->glink->size)
9517 {
9518 if (indx < 0x8000)
9519 {
9520 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9521 p += 4;
9522 }
9523 else
9524 {
9525 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9526 p += 4;
9527 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9528 p += 4;
9529 }
9530 bfd_put_32 (htab->glink->owner,
9531 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9532 indx++;
9533 p += 4;
9534 }
9535 htab->glink->rawsize = p - htab->glink->contents;
9536 }
9537
9538 if (htab->brlt->size != 0)
9539 {
9540 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9541 htab->brlt->size);
9542 if (htab->brlt->contents == NULL)
9543 return FALSE;
9544 }
9545 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9546 {
9547 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9548 htab->relbrlt->size);
9549 if (htab->relbrlt->contents == NULL)
9550 return FALSE;
9551 }
9552
9553 /* Build the stubs as directed by the stub hash table. */
9554 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9555
9556 if (htab->relbrlt != NULL)
9557 htab->relbrlt->reloc_count = 0;
9558
9559 for (stub_sec = htab->stub_bfd->sections;
9560 stub_sec != NULL;
9561 stub_sec = stub_sec->next)
9562 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9563 {
9564 stub_sec_count += 1;
9565 if (stub_sec->rawsize != stub_sec->size)
9566 break;
9567 }
9568
9569 if (stub_sec != NULL
9570 || htab->glink->rawsize != htab->glink->size)
9571 {
9572 htab->stub_error = TRUE;
9573 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9574 }
9575
9576 if (htab->stub_error)
9577 return FALSE;
9578
9579 if (stats != NULL)
9580 {
9581 *stats = bfd_malloc (500);
9582 if (*stats == NULL)
9583 return FALSE;
9584
9585 sprintf (*stats, _("linker stubs in %u group%s\n"
9586 " branch %lu\n"
9587 " toc adjust %lu\n"
9588 " long branch %lu\n"
9589 " long toc adj %lu\n"
9590 " plt call %lu"),
9591 stub_sec_count,
9592 stub_sec_count == 1 ? "" : "s",
9593 htab->stub_count[ppc_stub_long_branch - 1],
9594 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9595 htab->stub_count[ppc_stub_plt_branch - 1],
9596 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9597 htab->stub_count[ppc_stub_plt_call - 1]);
9598 }
9599 return TRUE;
9600 }
9601
9602 /* This function undoes the changes made by add_symbol_adjust. */
9603
9604 static bfd_boolean
9605 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9606 {
9607 struct ppc_link_hash_entry *eh;
9608
9609 if (h->root.type == bfd_link_hash_indirect)
9610 return TRUE;
9611
9612 if (h->root.type == bfd_link_hash_warning)
9613 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9614
9615 eh = (struct ppc_link_hash_entry *) h;
9616 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9617 return TRUE;
9618
9619 eh->elf.root.type = bfd_link_hash_undefined;
9620 return TRUE;
9621 }
9622
9623 void
9624 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9625 {
9626 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9627 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9628 }
9629
9630 /* What to do when ld finds relocations against symbols defined in
9631 discarded sections. */
9632
9633 static unsigned int
9634 ppc64_elf_action_discarded (asection *sec)
9635 {
9636 if (strcmp (".opd", sec->name) == 0)
9637 return 0;
9638
9639 if (strcmp (".toc", sec->name) == 0)
9640 return 0;
9641
9642 if (strcmp (".toc1", sec->name) == 0)
9643 return 0;
9644
9645 return _bfd_elf_default_action_discarded (sec);
9646 }
9647
9648 /* The RELOCATE_SECTION function is called by the ELF backend linker
9649 to handle the relocations for a section.
9650
9651 The relocs are always passed as Rela structures; if the section
9652 actually uses Rel structures, the r_addend field will always be
9653 zero.
9654
9655 This function is responsible for adjust the section contents as
9656 necessary, and (if using Rela relocs and generating a
9657 relocatable output file) adjusting the reloc addend as
9658 necessary.
9659
9660 This function does not have to worry about setting the reloc
9661 address or the reloc symbol index.
9662
9663 LOCAL_SYMS is a pointer to the swapped in local symbols.
9664
9665 LOCAL_SECTIONS is an array giving the section in the input file
9666 corresponding to the st_shndx field of each local symbol.
9667
9668 The global hash table entry for the global symbols can be found
9669 via elf_sym_hashes (input_bfd).
9670
9671 When generating relocatable output, this function must handle
9672 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9673 going to be the section symbol corresponding to the output
9674 section, which means that the addend must be adjusted
9675 accordingly. */
9676
9677 static bfd_boolean
9678 ppc64_elf_relocate_section (bfd *output_bfd,
9679 struct bfd_link_info *info,
9680 bfd *input_bfd,
9681 asection *input_section,
9682 bfd_byte *contents,
9683 Elf_Internal_Rela *relocs,
9684 Elf_Internal_Sym *local_syms,
9685 asection **local_sections)
9686 {
9687 struct ppc_link_hash_table *htab;
9688 Elf_Internal_Shdr *symtab_hdr;
9689 struct elf_link_hash_entry **sym_hashes;
9690 Elf_Internal_Rela *rel;
9691 Elf_Internal_Rela *relend;
9692 Elf_Internal_Rela outrel;
9693 bfd_byte *loc;
9694 struct got_entry **local_got_ents;
9695 bfd_vma TOCstart;
9696 bfd_boolean ret = TRUE;
9697 bfd_boolean is_opd;
9698 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9699 bfd_boolean is_power4 = FALSE;
9700
9701 /* Initialize howto table if needed. */
9702 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9703 ppc_howto_init ();
9704
9705 htab = ppc_hash_table (info);
9706
9707 /* Don't relocate stub sections. */
9708 if (input_section->owner == htab->stub_bfd)
9709 return TRUE;
9710
9711 local_got_ents = elf_local_got_ents (input_bfd);
9712 TOCstart = elf_gp (output_bfd);
9713 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9714 sym_hashes = elf_sym_hashes (input_bfd);
9715 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9716
9717 rel = relocs;
9718 relend = relocs + input_section->reloc_count;
9719 for (; rel < relend; rel++)
9720 {
9721 enum elf_ppc64_reloc_type r_type;
9722 bfd_vma addend, orig_addend;
9723 bfd_reloc_status_type r;
9724 Elf_Internal_Sym *sym;
9725 asection *sec;
9726 struct elf_link_hash_entry *h_elf;
9727 struct ppc_link_hash_entry *h;
9728 struct ppc_link_hash_entry *fdh;
9729 const char *sym_name;
9730 unsigned long r_symndx, toc_symndx;
9731 char tls_mask, tls_gd, tls_type;
9732 char sym_type;
9733 bfd_vma relocation;
9734 bfd_boolean unresolved_reloc;
9735 bfd_boolean warned;
9736 unsigned long insn, mask;
9737 struct ppc_stub_hash_entry *stub_entry;
9738 bfd_vma max_br_offset;
9739 bfd_vma from;
9740
9741 r_type = ELF64_R_TYPE (rel->r_info);
9742 r_symndx = ELF64_R_SYM (rel->r_info);
9743
9744 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9745 symbol of the previous ADDR64 reloc. The symbol gives us the
9746 proper TOC base to use. */
9747 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9748 && rel != relocs
9749 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9750 && is_opd)
9751 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9752
9753 sym = NULL;
9754 sec = NULL;
9755 h_elf = NULL;
9756 sym_name = NULL;
9757 unresolved_reloc = FALSE;
9758 warned = FALSE;
9759 orig_addend = rel->r_addend;
9760
9761 if (r_symndx < symtab_hdr->sh_info)
9762 {
9763 /* It's a local symbol. */
9764 long *opd_adjust;
9765
9766 sym = local_syms + r_symndx;
9767 sec = local_sections[r_symndx];
9768 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9769 sym_type = ELF64_ST_TYPE (sym->st_info);
9770 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9771 opd_adjust = get_opd_info (sec);
9772 if (opd_adjust != NULL)
9773 {
9774 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9775 if (adjust == -1)
9776 relocation = 0;
9777 else
9778 {
9779 /* If this is a relocation against the opd section sym
9780 and we have edited .opd, adjust the reloc addend so
9781 that ld -r and ld --emit-relocs output is correct.
9782 If it is a reloc against some other .opd symbol,
9783 then the symbol value will be adjusted later. */
9784 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9785 rel->r_addend += adjust;
9786 else
9787 relocation += adjust;
9788 }
9789 }
9790 if (info->relocatable)
9791 continue;
9792 }
9793 else
9794 {
9795 if (info->relocatable)
9796 continue;
9797 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9798 r_symndx, symtab_hdr, sym_hashes,
9799 h_elf, sec, relocation,
9800 unresolved_reloc, warned);
9801 sym_name = h_elf->root.root.string;
9802 sym_type = h_elf->type;
9803 }
9804 h = (struct ppc_link_hash_entry *) h_elf;
9805
9806 /* TLS optimizations. Replace instruction sequences and relocs
9807 based on information we collected in tls_optimize. We edit
9808 RELOCS so that --emit-relocs will output something sensible
9809 for the final instruction stream. */
9810 tls_mask = 0;
9811 tls_gd = 0;
9812 toc_symndx = 0;
9813 if (IS_PPC64_TLS_RELOC (r_type))
9814 {
9815 if (h != NULL)
9816 tls_mask = h->tls_mask;
9817 else if (local_got_ents != NULL)
9818 {
9819 char *lgot_masks;
9820 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9821 tls_mask = lgot_masks[r_symndx];
9822 }
9823 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9824 {
9825 /* Check for toc tls entries. */
9826 char *toc_tls;
9827
9828 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9829 rel, input_bfd))
9830 return FALSE;
9831
9832 if (toc_tls)
9833 tls_mask = *toc_tls;
9834 }
9835 }
9836
9837 /* Check that tls relocs are used with tls syms, and non-tls
9838 relocs are used with non-tls syms. */
9839 if (r_symndx != 0
9840 && r_type != R_PPC64_NONE
9841 && (h == NULL
9842 || h->elf.root.type == bfd_link_hash_defined
9843 || h->elf.root.type == bfd_link_hash_defweak)
9844 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9845 {
9846 if (r_type == R_PPC64_TLS && tls_mask != 0)
9847 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9848 ;
9849 else
9850 (*_bfd_error_handler)
9851 (sym_type == STT_TLS
9852 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9853 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9854 input_bfd,
9855 input_section,
9856 (long) rel->r_offset,
9857 ppc64_elf_howto_table[r_type]->name,
9858 sym_name);
9859 }
9860
9861 /* Ensure reloc mapping code below stays sane. */
9862 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9863 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9864 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9865 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9866 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9867 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9868 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9869 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9870 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9871 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9872 abort ();
9873
9874 switch (r_type)
9875 {
9876 default:
9877 break;
9878
9879 case R_PPC64_TOC16:
9880 case R_PPC64_TOC16_LO:
9881 case R_PPC64_TOC16_DS:
9882 case R_PPC64_TOC16_LO_DS:
9883 {
9884 /* Check for toc tls entries. */
9885 char *toc_tls;
9886 int retval;
9887
9888 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9889 rel, input_bfd);
9890 if (retval == 0)
9891 return FALSE;
9892
9893 if (toc_tls)
9894 {
9895 tls_mask = *toc_tls;
9896 if (r_type == R_PPC64_TOC16_DS
9897 || r_type == R_PPC64_TOC16_LO_DS)
9898 {
9899 if (tls_mask != 0
9900 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9901 goto toctprel;
9902 }
9903 else
9904 {
9905 /* If we found a GD reloc pair, then we might be
9906 doing a GD->IE transition. */
9907 if (retval == 2)
9908 {
9909 tls_gd = TLS_TPRELGD;
9910 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9911 goto tls_get_addr_check;
9912 }
9913 else if (retval == 3)
9914 {
9915 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9916 goto tls_get_addr_check;
9917 }
9918 }
9919 }
9920 }
9921 break;
9922
9923 case R_PPC64_GOT_TPREL16_DS:
9924 case R_PPC64_GOT_TPREL16_LO_DS:
9925 if (tls_mask != 0
9926 && (tls_mask & TLS_TPREL) == 0)
9927 {
9928 toctprel:
9929 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9930 insn &= 31 << 21;
9931 insn |= 0x3c0d0000; /* addis 0,13,0 */
9932 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9933 r_type = R_PPC64_TPREL16_HA;
9934 if (toc_symndx != 0)
9935 {
9936 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9937 /* We changed the symbol. Start over in order to
9938 get h, sym, sec etc. right. */
9939 rel--;
9940 continue;
9941 }
9942 else
9943 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9944 }
9945 break;
9946
9947 case R_PPC64_TLS:
9948 if (tls_mask != 0
9949 && (tls_mask & TLS_TPREL) == 0)
9950 {
9951 bfd_vma rtra;
9952 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9953 if ((insn & ((0x3f << 26) | (31 << 11)))
9954 == ((31 << 26) | (13 << 11)))
9955 rtra = insn & ((1 << 26) - (1 << 16));
9956 else if ((insn & ((0x3f << 26) | (31 << 16)))
9957 == ((31 << 26) | (13 << 16)))
9958 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9959 else
9960 abort ();
9961 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9962 /* add -> addi. */
9963 insn = 14 << 26;
9964 else if ((insn & (31 << 1)) == 23 << 1
9965 && ((insn & (31 << 6)) < 14 << 6
9966 || ((insn & (31 << 6)) >= 16 << 6
9967 && (insn & (31 << 6)) < 24 << 6)))
9968 /* load and store indexed -> dform. */
9969 insn = (32 | ((insn >> 6) & 31)) << 26;
9970 else if ((insn & (31 << 1)) == 21 << 1
9971 && (insn & (0x1a << 6)) == 0)
9972 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9973 insn = (((58 | ((insn >> 6) & 4)) << 26)
9974 | ((insn >> 6) & 1));
9975 else if ((insn & (31 << 1)) == 21 << 1
9976 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9977 /* lwax -> lwa. */
9978 insn = (58 << 26) | 2;
9979 else
9980 abort ();
9981 insn |= rtra;
9982 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9983 /* Was PPC64_TLS which sits on insn boundary, now
9984 PPC64_TPREL16_LO which is at insn+2. */
9985 rel->r_offset += 2;
9986 r_type = R_PPC64_TPREL16_LO;
9987 if (toc_symndx != 0)
9988 {
9989 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9990 /* We changed the symbol. Start over in order to
9991 get h, sym, sec etc. right. */
9992 rel--;
9993 continue;
9994 }
9995 else
9996 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9997 }
9998 break;
9999
10000 case R_PPC64_GOT_TLSGD16_HI:
10001 case R_PPC64_GOT_TLSGD16_HA:
10002 tls_gd = TLS_TPRELGD;
10003 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10004 goto tls_gdld_hi;
10005 break;
10006
10007 case R_PPC64_GOT_TLSLD16_HI:
10008 case R_PPC64_GOT_TLSLD16_HA:
10009 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10010 {
10011 tls_gdld_hi:
10012 if ((tls_mask & tls_gd) != 0)
10013 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10014 + R_PPC64_GOT_TPREL16_DS);
10015 else
10016 {
10017 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10018 rel->r_offset -= 2;
10019 r_type = R_PPC64_NONE;
10020 }
10021 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10022 }
10023 break;
10024
10025 case R_PPC64_GOT_TLSGD16:
10026 case R_PPC64_GOT_TLSGD16_LO:
10027 tls_gd = TLS_TPRELGD;
10028 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10029 goto tls_get_addr_check;
10030 break;
10031
10032 case R_PPC64_GOT_TLSLD16:
10033 case R_PPC64_GOT_TLSLD16_LO:
10034 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10035 {
10036 tls_get_addr_check:
10037 if (rel + 1 < relend)
10038 {
10039 enum elf_ppc64_reloc_type r_type2;
10040 unsigned long r_symndx2;
10041 struct elf_link_hash_entry *h2;
10042 bfd_vma insn1, insn2, insn3;
10043 bfd_vma offset;
10044
10045 /* The next instruction should be a call to
10046 __tls_get_addr. Peek at the reloc to be sure. */
10047 r_type2 = ELF64_R_TYPE (rel[1].r_info);
10048 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
10049 if (r_symndx2 < symtab_hdr->sh_info
10050 || (r_type2 != R_PPC64_REL14
10051 && r_type2 != R_PPC64_REL14_BRTAKEN
10052 && r_type2 != R_PPC64_REL14_BRNTAKEN
10053 && r_type2 != R_PPC64_REL24))
10054 break;
10055
10056 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
10057 while (h2->root.type == bfd_link_hash_indirect
10058 || h2->root.type == bfd_link_hash_warning)
10059 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
10060 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
10061 && h2 != &htab->tls_get_addr_fd->elf))
10062 break;
10063
10064 /* OK, it checks out. Replace the call. */
10065 offset = rel[1].r_offset;
10066 insn1 = bfd_get_32 (output_bfd,
10067 contents + rel->r_offset - 2);
10068 insn3 = bfd_get_32 (output_bfd,
10069 contents + offset + 4);
10070 if ((tls_mask & tls_gd) != 0)
10071 {
10072 /* IE */
10073 insn1 &= (1 << 26) - (1 << 2);
10074 insn1 |= 58 << 26; /* ld */
10075 insn2 = 0x7c636a14; /* add 3,3,13 */
10076 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
10077 if ((tls_mask & TLS_EXPLICIT) == 0)
10078 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10079 + R_PPC64_GOT_TPREL16_DS);
10080 else
10081 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10082 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10083 }
10084 else
10085 {
10086 /* LE */
10087 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10088 insn2 = 0x38630000; /* addi 3,3,0 */
10089 if (tls_gd == 0)
10090 {
10091 /* Was an LD reloc. */
10092 r_symndx = 0;
10093 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10094 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10095 }
10096 else if (toc_symndx != 0)
10097 r_symndx = toc_symndx;
10098 r_type = R_PPC64_TPREL16_HA;
10099 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10100 rel[1].r_info = ELF64_R_INFO (r_symndx,
10101 R_PPC64_TPREL16_LO);
10102 rel[1].r_offset += 2;
10103 }
10104 if (insn3 == NOP
10105 || insn3 == CROR_151515 || insn3 == CROR_313131)
10106 {
10107 insn3 = insn2;
10108 insn2 = NOP;
10109 rel[1].r_offset += 4;
10110 }
10111 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
10112 bfd_put_32 (output_bfd, insn2, contents + offset);
10113 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10114 if (tls_gd == 0 || toc_symndx != 0)
10115 {
10116 /* We changed the symbol. Start over in order
10117 to get h, sym, sec etc. right. */
10118 rel--;
10119 continue;
10120 }
10121 }
10122 }
10123 break;
10124
10125 case R_PPC64_DTPMOD64:
10126 if (rel + 1 < relend
10127 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10128 && rel[1].r_offset == rel->r_offset + 8)
10129 {
10130 if ((tls_mask & TLS_GD) == 0)
10131 {
10132 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10133 if ((tls_mask & TLS_TPRELGD) != 0)
10134 r_type = R_PPC64_TPREL64;
10135 else
10136 {
10137 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10138 r_type = R_PPC64_NONE;
10139 }
10140 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10141 }
10142 }
10143 else
10144 {
10145 if ((tls_mask & TLS_LD) == 0)
10146 {
10147 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10148 r_type = R_PPC64_NONE;
10149 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10150 }
10151 }
10152 break;
10153
10154 case R_PPC64_TPREL64:
10155 if ((tls_mask & TLS_TPREL) == 0)
10156 {
10157 r_type = R_PPC64_NONE;
10158 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10159 }
10160 break;
10161 }
10162
10163 /* Handle other relocations that tweak non-addend part of insn. */
10164 insn = 0;
10165 max_br_offset = 1 << 25;
10166 addend = rel->r_addend;
10167 switch (r_type)
10168 {
10169 default:
10170 break;
10171
10172 /* Branch taken prediction relocations. */
10173 case R_PPC64_ADDR14_BRTAKEN:
10174 case R_PPC64_REL14_BRTAKEN:
10175 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10176 /* Fall thru. */
10177
10178 /* Branch not taken prediction relocations. */
10179 case R_PPC64_ADDR14_BRNTAKEN:
10180 case R_PPC64_REL14_BRNTAKEN:
10181 insn |= bfd_get_32 (output_bfd,
10182 contents + rel->r_offset) & ~(0x01 << 21);
10183 /* Fall thru. */
10184
10185 case R_PPC64_REL14:
10186 max_br_offset = 1 << 15;
10187 /* Fall thru. */
10188
10189 case R_PPC64_REL24:
10190 /* Calls to functions with a different TOC, such as calls to
10191 shared objects, need to alter the TOC pointer. This is
10192 done using a linkage stub. A REL24 branching to these
10193 linkage stubs needs to be followed by a nop, as the nop
10194 will be replaced with an instruction to restore the TOC
10195 base pointer. */
10196 stub_entry = NULL;
10197 fdh = h;
10198 if (((h != NULL
10199 && (((fdh = h->oh) != NULL
10200 && fdh->elf.plt.plist != NULL)
10201 || (fdh = h)->elf.plt.plist != NULL))
10202 || (sec != NULL
10203 && sec->output_section != NULL
10204 && sec->id <= htab->top_id
10205 && (htab->stub_group[sec->id].toc_off
10206 != htab->stub_group[input_section->id].toc_off)))
10207 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10208 rel, htab)) != NULL
10209 && (stub_entry->stub_type == ppc_stub_plt_call
10210 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10211 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10212 {
10213 bfd_boolean can_plt_call = FALSE;
10214
10215 if (rel->r_offset + 8 <= input_section->size)
10216 {
10217 unsigned long nop;
10218 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10219 if (nop == NOP
10220 || nop == CROR_151515 || nop == CROR_313131)
10221 {
10222 bfd_put_32 (input_bfd, LD_R2_40R1,
10223 contents + rel->r_offset + 4);
10224 can_plt_call = TRUE;
10225 }
10226 }
10227
10228 if (!can_plt_call)
10229 {
10230 if (stub_entry->stub_type == ppc_stub_plt_call)
10231 {
10232 /* If this is a plain branch rather than a branch
10233 and link, don't require a nop. However, don't
10234 allow tail calls in a shared library as they
10235 will result in r2 being corrupted. */
10236 unsigned long br;
10237 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10238 if (info->executable && (br & 1) == 0)
10239 can_plt_call = TRUE;
10240 else
10241 stub_entry = NULL;
10242 }
10243 else if (h != NULL
10244 && strcmp (h->elf.root.root.string,
10245 ".__libc_start_main") == 0)
10246 {
10247 /* Allow crt1 branch to go via a toc adjusting stub. */
10248 can_plt_call = TRUE;
10249 }
10250 else
10251 {
10252 if (strcmp (input_section->output_section->name,
10253 ".init") == 0
10254 || strcmp (input_section->output_section->name,
10255 ".fini") == 0)
10256 (*_bfd_error_handler)
10257 (_("%B(%A+0x%lx): automatic multiple TOCs "
10258 "not supported using your crt files; "
10259 "recompile with -mminimal-toc or upgrade gcc"),
10260 input_bfd,
10261 input_section,
10262 (long) rel->r_offset);
10263 else
10264 (*_bfd_error_handler)
10265 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10266 "does not allow automatic multiple TOCs; "
10267 "recompile with -mminimal-toc or "
10268 "-fno-optimize-sibling-calls, "
10269 "or make `%s' extern"),
10270 input_bfd,
10271 input_section,
10272 (long) rel->r_offset,
10273 sym_name,
10274 sym_name);
10275 bfd_set_error (bfd_error_bad_value);
10276 ret = FALSE;
10277 }
10278 }
10279
10280 if (can_plt_call
10281 && stub_entry->stub_type == ppc_stub_plt_call)
10282 unresolved_reloc = FALSE;
10283 }
10284
10285 if (stub_entry == NULL
10286 && get_opd_info (sec) != NULL)
10287 {
10288 /* The branch destination is the value of the opd entry. */
10289 bfd_vma off = (relocation + addend
10290 - sec->output_section->vma
10291 - sec->output_offset);
10292 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10293 if (dest != (bfd_vma) -1)
10294 {
10295 relocation = dest;
10296 addend = 0;
10297 }
10298 }
10299
10300 /* If the branch is out of reach we ought to have a long
10301 branch stub. */
10302 from = (rel->r_offset
10303 + input_section->output_offset
10304 + input_section->output_section->vma);
10305
10306 if (stub_entry == NULL
10307 && (relocation + addend - from + max_br_offset
10308 >= 2 * max_br_offset)
10309 && r_type != R_PPC64_ADDR14_BRTAKEN
10310 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10311 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10312 htab);
10313
10314 if (stub_entry != NULL)
10315 {
10316 /* Munge up the value and addend so that we call the stub
10317 rather than the procedure directly. */
10318 relocation = (stub_entry->stub_offset
10319 + stub_entry->stub_sec->output_offset
10320 + stub_entry->stub_sec->output_section->vma);
10321 addend = 0;
10322 }
10323
10324 if (insn != 0)
10325 {
10326 if (is_power4)
10327 {
10328 /* Set 'a' bit. This is 0b00010 in BO field for branch
10329 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10330 for branch on CTR insns (BO == 1a00t or 1a01t). */
10331 if ((insn & (0x14 << 21)) == (0x04 << 21))
10332 insn |= 0x02 << 21;
10333 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10334 insn |= 0x08 << 21;
10335 else
10336 break;
10337 }
10338 else
10339 {
10340 /* Invert 'y' bit if not the default. */
10341 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10342 insn ^= 0x01 << 21;
10343 }
10344
10345 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10346 }
10347
10348 /* NOP out calls to undefined weak functions.
10349 We can thus call a weak function without first
10350 checking whether the function is defined. */
10351 else if (h != NULL
10352 && h->elf.root.type == bfd_link_hash_undefweak
10353 && r_type == R_PPC64_REL24
10354 && relocation == 0
10355 && addend == 0)
10356 {
10357 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10358 continue;
10359 }
10360 break;
10361 }
10362
10363 /* Set `addend'. */
10364 tls_type = 0;
10365 switch (r_type)
10366 {
10367 default:
10368 (*_bfd_error_handler)
10369 (_("%B: unknown relocation type %d for symbol %s"),
10370 input_bfd, (int) r_type, sym_name);
10371
10372 bfd_set_error (bfd_error_bad_value);
10373 ret = FALSE;
10374 continue;
10375
10376 case R_PPC64_NONE:
10377 case R_PPC64_TLS:
10378 case R_PPC64_GNU_VTINHERIT:
10379 case R_PPC64_GNU_VTENTRY:
10380 continue;
10381
10382 /* GOT16 relocations. Like an ADDR16 using the symbol's
10383 address in the GOT as relocation value instead of the
10384 symbol's value itself. Also, create a GOT entry for the
10385 symbol and put the symbol value there. */
10386 case R_PPC64_GOT_TLSGD16:
10387 case R_PPC64_GOT_TLSGD16_LO:
10388 case R_PPC64_GOT_TLSGD16_HI:
10389 case R_PPC64_GOT_TLSGD16_HA:
10390 tls_type = TLS_TLS | TLS_GD;
10391 goto dogot;
10392
10393 case R_PPC64_GOT_TLSLD16:
10394 case R_PPC64_GOT_TLSLD16_LO:
10395 case R_PPC64_GOT_TLSLD16_HI:
10396 case R_PPC64_GOT_TLSLD16_HA:
10397 tls_type = TLS_TLS | TLS_LD;
10398 goto dogot;
10399
10400 case R_PPC64_GOT_TPREL16_DS:
10401 case R_PPC64_GOT_TPREL16_LO_DS:
10402 case R_PPC64_GOT_TPREL16_HI:
10403 case R_PPC64_GOT_TPREL16_HA:
10404 tls_type = TLS_TLS | TLS_TPREL;
10405 goto dogot;
10406
10407 case R_PPC64_GOT_DTPREL16_DS:
10408 case R_PPC64_GOT_DTPREL16_LO_DS:
10409 case R_PPC64_GOT_DTPREL16_HI:
10410 case R_PPC64_GOT_DTPREL16_HA:
10411 tls_type = TLS_TLS | TLS_DTPREL;
10412 goto dogot;
10413
10414 case R_PPC64_GOT16:
10415 case R_PPC64_GOT16_LO:
10416 case R_PPC64_GOT16_HI:
10417 case R_PPC64_GOT16_HA:
10418 case R_PPC64_GOT16_DS:
10419 case R_PPC64_GOT16_LO_DS:
10420 dogot:
10421 {
10422 /* Relocation is to the entry for this symbol in the global
10423 offset table. */
10424 asection *got;
10425 bfd_vma *offp;
10426 bfd_vma off;
10427 unsigned long indx = 0;
10428
10429 if (tls_type == (TLS_TLS | TLS_LD)
10430 && (h == NULL
10431 || !h->elf.def_dynamic))
10432 offp = &ppc64_tlsld_got (input_bfd)->offset;
10433 else
10434 {
10435 struct got_entry *ent;
10436
10437 if (h != NULL)
10438 {
10439 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10440 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10441 &h->elf)
10442 || (info->shared
10443 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10444 /* This is actually a static link, or it is a
10445 -Bsymbolic link and the symbol is defined
10446 locally, or the symbol was forced to be local
10447 because of a version file. */
10448 ;
10449 else
10450 {
10451 indx = h->elf.dynindx;
10452 unresolved_reloc = FALSE;
10453 }
10454 ent = h->elf.got.glist;
10455 }
10456 else
10457 {
10458 if (local_got_ents == NULL)
10459 abort ();
10460 ent = local_got_ents[r_symndx];
10461 }
10462
10463 for (; ent != NULL; ent = ent->next)
10464 if (ent->addend == orig_addend
10465 && ent->owner == input_bfd
10466 && ent->tls_type == tls_type)
10467 break;
10468 if (ent == NULL)
10469 abort ();
10470 offp = &ent->got.offset;
10471 }
10472
10473 got = ppc64_elf_tdata (input_bfd)->got;
10474 if (got == NULL)
10475 abort ();
10476
10477 /* The offset must always be a multiple of 8. We use the
10478 least significant bit to record whether we have already
10479 processed this entry. */
10480 off = *offp;
10481 if ((off & 1) != 0)
10482 off &= ~1;
10483 else
10484 {
10485 /* Generate relocs for the dynamic linker, except in
10486 the case of TLSLD where we'll use one entry per
10487 module. */
10488 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10489
10490 *offp = off | 1;
10491 if ((info->shared || indx != 0)
10492 && (h == NULL
10493 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10494 || h->elf.root.type != bfd_link_hash_undefweak))
10495 {
10496 outrel.r_offset = (got->output_section->vma
10497 + got->output_offset
10498 + off);
10499 outrel.r_addend = addend;
10500 if (tls_type & (TLS_LD | TLS_GD))
10501 {
10502 outrel.r_addend = 0;
10503 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10504 if (tls_type == (TLS_TLS | TLS_GD))
10505 {
10506 loc = relgot->contents;
10507 loc += (relgot->reloc_count++
10508 * sizeof (Elf64_External_Rela));
10509 bfd_elf64_swap_reloca_out (output_bfd,
10510 &outrel, loc);
10511 outrel.r_offset += 8;
10512 outrel.r_addend = addend;
10513 outrel.r_info
10514 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10515 }
10516 }
10517 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10518 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10519 else if (tls_type == (TLS_TLS | TLS_TPREL))
10520 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10521 else if (indx == 0)
10522 {
10523 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10524
10525 /* Write the .got section contents for the sake
10526 of prelink. */
10527 loc = got->contents + off;
10528 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10529 loc);
10530 }
10531 else
10532 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10533
10534 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10535 {
10536 outrel.r_addend += relocation;
10537 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10538 outrel.r_addend -= htab->elf.tls_sec->vma;
10539 }
10540 loc = relgot->contents;
10541 loc += (relgot->reloc_count++
10542 * sizeof (Elf64_External_Rela));
10543 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10544 }
10545
10546 /* Init the .got section contents here if we're not
10547 emitting a reloc. */
10548 else
10549 {
10550 relocation += addend;
10551 if (tls_type == (TLS_TLS | TLS_LD))
10552 relocation = 1;
10553 else if (tls_type != 0)
10554 {
10555 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10556 if (tls_type == (TLS_TLS | TLS_TPREL))
10557 relocation += DTP_OFFSET - TP_OFFSET;
10558
10559 if (tls_type == (TLS_TLS | TLS_GD))
10560 {
10561 bfd_put_64 (output_bfd, relocation,
10562 got->contents + off + 8);
10563 relocation = 1;
10564 }
10565 }
10566
10567 bfd_put_64 (output_bfd, relocation,
10568 got->contents + off);
10569 }
10570 }
10571
10572 if (off >= (bfd_vma) -2)
10573 abort ();
10574
10575 relocation = got->output_offset + off;
10576
10577 /* TOC base (r2) is TOC start plus 0x8000. */
10578 addend = -TOC_BASE_OFF;
10579 }
10580 break;
10581
10582 case R_PPC64_PLT16_HA:
10583 case R_PPC64_PLT16_HI:
10584 case R_PPC64_PLT16_LO:
10585 case R_PPC64_PLT32:
10586 case R_PPC64_PLT64:
10587 /* Relocation is to the entry for this symbol in the
10588 procedure linkage table. */
10589
10590 /* Resolve a PLT reloc against a local symbol directly,
10591 without using the procedure linkage table. */
10592 if (h == NULL)
10593 break;
10594
10595 /* It's possible that we didn't make a PLT entry for this
10596 symbol. This happens when statically linking PIC code,
10597 or when using -Bsymbolic. Go find a match if there is a
10598 PLT entry. */
10599 if (htab->plt != NULL)
10600 {
10601 struct plt_entry *ent;
10602 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10603 if (ent->addend == orig_addend
10604 && ent->plt.offset != (bfd_vma) -1)
10605 {
10606 relocation = (htab->plt->output_section->vma
10607 + htab->plt->output_offset
10608 + ent->plt.offset);
10609 unresolved_reloc = FALSE;
10610 }
10611 }
10612 break;
10613
10614 case R_PPC64_TOC:
10615 /* Relocation value is TOC base. */
10616 relocation = TOCstart;
10617 if (r_symndx == 0)
10618 relocation += htab->stub_group[input_section->id].toc_off;
10619 else if (unresolved_reloc)
10620 ;
10621 else if (sec != NULL && sec->id <= htab->top_id)
10622 relocation += htab->stub_group[sec->id].toc_off;
10623 else
10624 unresolved_reloc = TRUE;
10625 goto dodyn2;
10626
10627 /* TOC16 relocs. We want the offset relative to the TOC base,
10628 which is the address of the start of the TOC plus 0x8000.
10629 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10630 in this order. */
10631 case R_PPC64_TOC16:
10632 case R_PPC64_TOC16_LO:
10633 case R_PPC64_TOC16_HI:
10634 case R_PPC64_TOC16_DS:
10635 case R_PPC64_TOC16_LO_DS:
10636 case R_PPC64_TOC16_HA:
10637 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10638 break;
10639
10640 /* Relocate against the beginning of the section. */
10641 case R_PPC64_SECTOFF:
10642 case R_PPC64_SECTOFF_LO:
10643 case R_PPC64_SECTOFF_HI:
10644 case R_PPC64_SECTOFF_DS:
10645 case R_PPC64_SECTOFF_LO_DS:
10646 case R_PPC64_SECTOFF_HA:
10647 if (sec != NULL)
10648 addend -= sec->output_section->vma;
10649 break;
10650
10651 case R_PPC64_REL14:
10652 case R_PPC64_REL14_BRNTAKEN:
10653 case R_PPC64_REL14_BRTAKEN:
10654 case R_PPC64_REL24:
10655 break;
10656
10657 case R_PPC64_TPREL16:
10658 case R_PPC64_TPREL16_LO:
10659 case R_PPC64_TPREL16_HI:
10660 case R_PPC64_TPREL16_HA:
10661 case R_PPC64_TPREL16_DS:
10662 case R_PPC64_TPREL16_LO_DS:
10663 case R_PPC64_TPREL16_HIGHER:
10664 case R_PPC64_TPREL16_HIGHERA:
10665 case R_PPC64_TPREL16_HIGHEST:
10666 case R_PPC64_TPREL16_HIGHESTA:
10667 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10668 if (info->shared)
10669 /* The TPREL16 relocs shouldn't really be used in shared
10670 libs as they will result in DT_TEXTREL being set, but
10671 support them anyway. */
10672 goto dodyn;
10673 break;
10674
10675 case R_PPC64_DTPREL16:
10676 case R_PPC64_DTPREL16_LO:
10677 case R_PPC64_DTPREL16_HI:
10678 case R_PPC64_DTPREL16_HA:
10679 case R_PPC64_DTPREL16_DS:
10680 case R_PPC64_DTPREL16_LO_DS:
10681 case R_PPC64_DTPREL16_HIGHER:
10682 case R_PPC64_DTPREL16_HIGHERA:
10683 case R_PPC64_DTPREL16_HIGHEST:
10684 case R_PPC64_DTPREL16_HIGHESTA:
10685 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10686 break;
10687
10688 case R_PPC64_DTPMOD64:
10689 relocation = 1;
10690 addend = 0;
10691 goto dodyn;
10692
10693 case R_PPC64_TPREL64:
10694 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10695 goto dodyn;
10696
10697 case R_PPC64_DTPREL64:
10698 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10699 /* Fall thru */
10700
10701 /* Relocations that may need to be propagated if this is a
10702 dynamic object. */
10703 case R_PPC64_REL30:
10704 case R_PPC64_REL32:
10705 case R_PPC64_REL64:
10706 case R_PPC64_ADDR14:
10707 case R_PPC64_ADDR14_BRNTAKEN:
10708 case R_PPC64_ADDR14_BRTAKEN:
10709 case R_PPC64_ADDR16:
10710 case R_PPC64_ADDR16_DS:
10711 case R_PPC64_ADDR16_HA:
10712 case R_PPC64_ADDR16_HI:
10713 case R_PPC64_ADDR16_HIGHER:
10714 case R_PPC64_ADDR16_HIGHERA:
10715 case R_PPC64_ADDR16_HIGHEST:
10716 case R_PPC64_ADDR16_HIGHESTA:
10717 case R_PPC64_ADDR16_LO:
10718 case R_PPC64_ADDR16_LO_DS:
10719 case R_PPC64_ADDR24:
10720 case R_PPC64_ADDR32:
10721 case R_PPC64_ADDR64:
10722 case R_PPC64_UADDR16:
10723 case R_PPC64_UADDR32:
10724 case R_PPC64_UADDR64:
10725 /* r_symndx will be zero only for relocs against symbols
10726 from removed linkonce sections, or sections discarded by
10727 a linker script. */
10728 dodyn:
10729 if (r_symndx == 0)
10730 break;
10731 /* Fall thru. */
10732
10733 dodyn2:
10734 if ((input_section->flags & SEC_ALLOC) == 0)
10735 break;
10736
10737 if (NO_OPD_RELOCS && is_opd)
10738 break;
10739
10740 if ((info->shared
10741 && (h == NULL
10742 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10743 || h->elf.root.type != bfd_link_hash_undefweak)
10744 && (MUST_BE_DYN_RELOC (r_type)
10745 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10746 || (ELIMINATE_COPY_RELOCS
10747 && !info->shared
10748 && h != NULL
10749 && h->elf.dynindx != -1
10750 && !h->elf.non_got_ref
10751 && h->elf.def_dynamic
10752 && !h->elf.def_regular))
10753 {
10754 Elf_Internal_Rela outrel;
10755 bfd_boolean skip, relocate;
10756 asection *sreloc;
10757 bfd_byte *loc;
10758 bfd_vma out_off;
10759
10760 /* When generating a dynamic object, these relocations
10761 are copied into the output file to be resolved at run
10762 time. */
10763
10764 skip = FALSE;
10765 relocate = FALSE;
10766
10767 out_off = _bfd_elf_section_offset (output_bfd, info,
10768 input_section, rel->r_offset);
10769 if (out_off == (bfd_vma) -1)
10770 skip = TRUE;
10771 else if (out_off == (bfd_vma) -2)
10772 skip = TRUE, relocate = TRUE;
10773 out_off += (input_section->output_section->vma
10774 + input_section->output_offset);
10775 outrel.r_offset = out_off;
10776 outrel.r_addend = rel->r_addend;
10777
10778 /* Optimize unaligned reloc use. */
10779 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10780 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10781 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10782 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10783 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10784 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10785 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10786 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10787 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10788
10789 if (skip)
10790 memset (&outrel, 0, sizeof outrel);
10791 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10792 && !is_opd
10793 && r_type != R_PPC64_TOC)
10794 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10795 else
10796 {
10797 /* This symbol is local, or marked to become local,
10798 or this is an opd section reloc which must point
10799 at a local function. */
10800 outrel.r_addend += relocation;
10801 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10802 {
10803 if (is_opd && h != NULL)
10804 {
10805 /* Lie about opd entries. This case occurs
10806 when building shared libraries and we
10807 reference a function in another shared
10808 lib. The same thing happens for a weak
10809 definition in an application that's
10810 overridden by a strong definition in a
10811 shared lib. (I believe this is a generic
10812 bug in binutils handling of weak syms.)
10813 In these cases we won't use the opd
10814 entry in this lib. */
10815 unresolved_reloc = FALSE;
10816 }
10817 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10818
10819 /* We need to relocate .opd contents for ld.so.
10820 Prelink also wants simple and consistent rules
10821 for relocs. This make all RELATIVE relocs have
10822 *r_offset equal to r_addend. */
10823 relocate = TRUE;
10824 }
10825 else
10826 {
10827 long indx = 0;
10828
10829 if (bfd_is_abs_section (sec))
10830 ;
10831 else if (sec == NULL || sec->owner == NULL)
10832 {
10833 bfd_set_error (bfd_error_bad_value);
10834 return FALSE;
10835 }
10836 else
10837 {
10838 asection *osec;
10839
10840 osec = sec->output_section;
10841 indx = elf_section_data (osec)->dynindx;
10842
10843 /* We are turning this relocation into one
10844 against a section symbol, so subtract out
10845 the output section's address but not the
10846 offset of the input section in the output
10847 section. */
10848 outrel.r_addend -= osec->vma;
10849 }
10850
10851 outrel.r_info = ELF64_R_INFO (indx, r_type);
10852 }
10853 }
10854
10855 sreloc = elf_section_data (input_section)->sreloc;
10856 if (sreloc == NULL)
10857 abort ();
10858
10859 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
10860 >= sreloc->size)
10861 abort ();
10862 loc = sreloc->contents;
10863 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10864 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10865
10866 /* If this reloc is against an external symbol, it will
10867 be computed at runtime, so there's no need to do
10868 anything now. However, for the sake of prelink ensure
10869 that the section contents are a known value. */
10870 if (! relocate)
10871 {
10872 unresolved_reloc = FALSE;
10873 /* The value chosen here is quite arbitrary as ld.so
10874 ignores section contents except for the special
10875 case of .opd where the contents might be accessed
10876 before relocation. Choose zero, as that won't
10877 cause reloc overflow. */
10878 relocation = 0;
10879 addend = 0;
10880 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10881 to improve backward compatibility with older
10882 versions of ld. */
10883 if (r_type == R_PPC64_ADDR64)
10884 addend = outrel.r_addend;
10885 /* Adjust pc_relative relocs to have zero in *r_offset. */
10886 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10887 addend = (input_section->output_section->vma
10888 + input_section->output_offset
10889 + rel->r_offset);
10890 }
10891 }
10892 break;
10893
10894 case R_PPC64_COPY:
10895 case R_PPC64_GLOB_DAT:
10896 case R_PPC64_JMP_SLOT:
10897 case R_PPC64_RELATIVE:
10898 /* We shouldn't ever see these dynamic relocs in relocatable
10899 files. */
10900 /* Fall through. */
10901
10902 case R_PPC64_PLTGOT16:
10903 case R_PPC64_PLTGOT16_DS:
10904 case R_PPC64_PLTGOT16_HA:
10905 case R_PPC64_PLTGOT16_HI:
10906 case R_PPC64_PLTGOT16_LO:
10907 case R_PPC64_PLTGOT16_LO_DS:
10908 case R_PPC64_PLTREL32:
10909 case R_PPC64_PLTREL64:
10910 /* These ones haven't been implemented yet. */
10911
10912 (*_bfd_error_handler)
10913 (_("%B: relocation %s is not supported for symbol %s."),
10914 input_bfd,
10915 ppc64_elf_howto_table[r_type]->name, sym_name);
10916
10917 bfd_set_error (bfd_error_invalid_operation);
10918 ret = FALSE;
10919 continue;
10920 }
10921
10922 /* Do any further special processing. */
10923 switch (r_type)
10924 {
10925 default:
10926 break;
10927
10928 case R_PPC64_ADDR16_HA:
10929 case R_PPC64_ADDR16_HIGHERA:
10930 case R_PPC64_ADDR16_HIGHESTA:
10931 case R_PPC64_TOC16_HA:
10932 case R_PPC64_SECTOFF_HA:
10933 case R_PPC64_TPREL16_HA:
10934 case R_PPC64_DTPREL16_HA:
10935 case R_PPC64_TPREL16_HIGHER:
10936 case R_PPC64_TPREL16_HIGHERA:
10937 case R_PPC64_TPREL16_HIGHEST:
10938 case R_PPC64_TPREL16_HIGHESTA:
10939 case R_PPC64_DTPREL16_HIGHER:
10940 case R_PPC64_DTPREL16_HIGHERA:
10941 case R_PPC64_DTPREL16_HIGHEST:
10942 case R_PPC64_DTPREL16_HIGHESTA:
10943 /* It's just possible that this symbol is a weak symbol
10944 that's not actually defined anywhere. In that case,
10945 'sec' would be NULL, and we should leave the symbol
10946 alone (it will be set to zero elsewhere in the link). */
10947 if (sec == NULL)
10948 break;
10949 /* Fall thru */
10950
10951 case R_PPC64_GOT16_HA:
10952 case R_PPC64_PLTGOT16_HA:
10953 case R_PPC64_PLT16_HA:
10954 case R_PPC64_GOT_TLSGD16_HA:
10955 case R_PPC64_GOT_TLSLD16_HA:
10956 case R_PPC64_GOT_TPREL16_HA:
10957 case R_PPC64_GOT_DTPREL16_HA:
10958 /* Add 0x10000 if sign bit in 0:15 is set.
10959 Bits 0:15 are not used. */
10960 addend += 0x8000;
10961 break;
10962
10963 case R_PPC64_ADDR16_DS:
10964 case R_PPC64_ADDR16_LO_DS:
10965 case R_PPC64_GOT16_DS:
10966 case R_PPC64_GOT16_LO_DS:
10967 case R_PPC64_PLT16_LO_DS:
10968 case R_PPC64_SECTOFF_DS:
10969 case R_PPC64_SECTOFF_LO_DS:
10970 case R_PPC64_TOC16_DS:
10971 case R_PPC64_TOC16_LO_DS:
10972 case R_PPC64_PLTGOT16_DS:
10973 case R_PPC64_PLTGOT16_LO_DS:
10974 case R_PPC64_GOT_TPREL16_DS:
10975 case R_PPC64_GOT_TPREL16_LO_DS:
10976 case R_PPC64_GOT_DTPREL16_DS:
10977 case R_PPC64_GOT_DTPREL16_LO_DS:
10978 case R_PPC64_TPREL16_DS:
10979 case R_PPC64_TPREL16_LO_DS:
10980 case R_PPC64_DTPREL16_DS:
10981 case R_PPC64_DTPREL16_LO_DS:
10982 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10983 mask = 3;
10984 /* If this reloc is against an lq insn, then the value must be
10985 a multiple of 16. This is somewhat of a hack, but the
10986 "correct" way to do this by defining _DQ forms of all the
10987 _DS relocs bloats all reloc switches in this file. It
10988 doesn't seem to make much sense to use any of these relocs
10989 in data, so testing the insn should be safe. */
10990 if ((insn & (0x3f << 26)) == (56u << 26))
10991 mask = 15;
10992 if (((relocation + addend) & mask) != 0)
10993 {
10994 (*_bfd_error_handler)
10995 (_("%B: error: relocation %s not a multiple of %d"),
10996 input_bfd,
10997 ppc64_elf_howto_table[r_type]->name,
10998 mask + 1);
10999 bfd_set_error (bfd_error_bad_value);
11000 ret = FALSE;
11001 continue;
11002 }
11003 break;
11004 }
11005
11006 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11007 because such sections are not SEC_ALLOC and thus ld.so will
11008 not process them. */
11009 if (unresolved_reloc
11010 && !((input_section->flags & SEC_DEBUGGING) != 0
11011 && h->elf.def_dynamic))
11012 {
11013 (*_bfd_error_handler)
11014 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11015 input_bfd,
11016 input_section,
11017 (long) rel->r_offset,
11018 ppc64_elf_howto_table[(int) r_type]->name,
11019 h->elf.root.root.string);
11020 ret = FALSE;
11021 }
11022
11023 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11024 input_bfd,
11025 input_section,
11026 contents,
11027 rel->r_offset,
11028 relocation,
11029 addend);
11030
11031 if (r != bfd_reloc_ok)
11032 {
11033 if (sym_name == NULL)
11034 sym_name = "(null)";
11035 if (r == bfd_reloc_overflow)
11036 {
11037 if (warned)
11038 continue;
11039 if (h != NULL
11040 && h->elf.root.type == bfd_link_hash_undefweak
11041 && ppc64_elf_howto_table[r_type]->pc_relative)
11042 {
11043 /* Assume this is a call protected by other code that
11044 detects the symbol is undefined. If this is the case,
11045 we can safely ignore the overflow. If not, the
11046 program is hosed anyway, and a little warning isn't
11047 going to help. */
11048
11049 continue;
11050 }
11051
11052 if (!((*info->callbacks->reloc_overflow)
11053 (info, (h ? &h->elf.root : NULL), sym_name,
11054 ppc64_elf_howto_table[r_type]->name,
11055 orig_addend, input_bfd, input_section, rel->r_offset)))
11056 return FALSE;
11057 }
11058 else
11059 {
11060 (*_bfd_error_handler)
11061 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11062 input_bfd,
11063 input_section,
11064 (long) rel->r_offset,
11065 ppc64_elf_howto_table[r_type]->name,
11066 sym_name,
11067 (int) r);
11068 ret = FALSE;
11069 }
11070 }
11071 }
11072
11073 /* If we're emitting relocations, then shortly after this function
11074 returns, reloc offsets and addends for this section will be
11075 adjusted. Worse, reloc symbol indices will be for the output
11076 file rather than the input. Save a copy of the relocs for
11077 opd_entry_value. */
11078 if (is_opd && (info->emitrelocations || info->relocatable))
11079 {
11080 bfd_size_type amt;
11081 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11082 rel = bfd_alloc (input_bfd, amt);
11083 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11084 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11085 if (rel == NULL)
11086 return FALSE;
11087 memcpy (rel, relocs, amt);
11088 }
11089 return ret;
11090 }
11091
11092 /* Adjust the value of any local symbols in opd sections. */
11093
11094 static bfd_boolean
11095 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11096 const char *name ATTRIBUTE_UNUSED,
11097 Elf_Internal_Sym *elfsym,
11098 asection *input_sec,
11099 struct elf_link_hash_entry *h)
11100 {
11101 long *opd_adjust, adjust;
11102 bfd_vma value;
11103
11104 if (h != NULL)
11105 return TRUE;
11106
11107 opd_adjust = get_opd_info (input_sec);
11108 if (opd_adjust == NULL)
11109 return TRUE;
11110
11111 value = elfsym->st_value - input_sec->output_offset;
11112 if (!info->relocatable)
11113 value -= input_sec->output_section->vma;
11114
11115 adjust = opd_adjust[value / 8];
11116 if (adjust == -1)
11117 elfsym->st_value = 0;
11118 else
11119 elfsym->st_value += adjust;
11120 return TRUE;
11121 }
11122
11123 /* Finish up dynamic symbol handling. We set the contents of various
11124 dynamic sections here. */
11125
11126 static bfd_boolean
11127 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11128 struct bfd_link_info *info,
11129 struct elf_link_hash_entry *h,
11130 Elf_Internal_Sym *sym)
11131 {
11132 struct ppc_link_hash_table *htab;
11133 struct plt_entry *ent;
11134 Elf_Internal_Rela rela;
11135 bfd_byte *loc;
11136
11137 htab = ppc_hash_table (info);
11138
11139 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11140 if (ent->plt.offset != (bfd_vma) -1)
11141 {
11142 /* This symbol has an entry in the procedure linkage
11143 table. Set it up. */
11144
11145 if (htab->plt == NULL
11146 || htab->relplt == NULL
11147 || htab->glink == NULL)
11148 abort ();
11149
11150 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11151 fill in the PLT entry. */
11152 rela.r_offset = (htab->plt->output_section->vma
11153 + htab->plt->output_offset
11154 + ent->plt.offset);
11155 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11156 rela.r_addend = ent->addend;
11157
11158 loc = htab->relplt->contents;
11159 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11160 * sizeof (Elf64_External_Rela));
11161 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11162 }
11163
11164 if (h->needs_copy)
11165 {
11166 Elf_Internal_Rela rela;
11167 bfd_byte *loc;
11168
11169 /* This symbol needs a copy reloc. Set it up. */
11170
11171 if (h->dynindx == -1
11172 || (h->root.type != bfd_link_hash_defined
11173 && h->root.type != bfd_link_hash_defweak)
11174 || htab->relbss == NULL)
11175 abort ();
11176
11177 rela.r_offset = (h->root.u.def.value
11178 + h->root.u.def.section->output_section->vma
11179 + h->root.u.def.section->output_offset);
11180 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11181 rela.r_addend = 0;
11182 loc = htab->relbss->contents;
11183 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11184 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11185 }
11186
11187 /* Mark some specially defined symbols as absolute. */
11188 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11189 sym->st_shndx = SHN_ABS;
11190
11191 return TRUE;
11192 }
11193
11194 /* Used to decide how to sort relocs in an optimal manner for the
11195 dynamic linker, before writing them out. */
11196
11197 static enum elf_reloc_type_class
11198 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11199 {
11200 enum elf_ppc64_reloc_type r_type;
11201
11202 r_type = ELF64_R_TYPE (rela->r_info);
11203 switch (r_type)
11204 {
11205 case R_PPC64_RELATIVE:
11206 return reloc_class_relative;
11207 case R_PPC64_JMP_SLOT:
11208 return reloc_class_plt;
11209 case R_PPC64_COPY:
11210 return reloc_class_copy;
11211 default:
11212 return reloc_class_normal;
11213 }
11214 }
11215
11216 /* Finish up the dynamic sections. */
11217
11218 static bfd_boolean
11219 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11220 struct bfd_link_info *info)
11221 {
11222 struct ppc_link_hash_table *htab;
11223 bfd *dynobj;
11224 asection *sdyn;
11225
11226 htab = ppc_hash_table (info);
11227 dynobj = htab->elf.dynobj;
11228 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11229
11230 if (htab->elf.dynamic_sections_created)
11231 {
11232 Elf64_External_Dyn *dyncon, *dynconend;
11233
11234 if (sdyn == NULL || htab->got == NULL)
11235 abort ();
11236
11237 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11238 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11239 for (; dyncon < dynconend; dyncon++)
11240 {
11241 Elf_Internal_Dyn dyn;
11242 asection *s;
11243
11244 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11245
11246 switch (dyn.d_tag)
11247 {
11248 default:
11249 continue;
11250
11251 case DT_PPC64_GLINK:
11252 s = htab->glink;
11253 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11254 /* We stupidly defined DT_PPC64_GLINK to be the start
11255 of glink rather than the first entry point, which is
11256 what ld.so needs, and now have a bigger stub to
11257 support automatic multiple TOCs. */
11258 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11259 break;
11260
11261 case DT_PPC64_OPD:
11262 s = bfd_get_section_by_name (output_bfd, ".opd");
11263 if (s == NULL)
11264 continue;
11265 dyn.d_un.d_ptr = s->vma;
11266 break;
11267
11268 case DT_PPC64_OPDSZ:
11269 s = bfd_get_section_by_name (output_bfd, ".opd");
11270 if (s == NULL)
11271 continue;
11272 dyn.d_un.d_val = s->size;
11273 break;
11274
11275 case DT_PLTGOT:
11276 s = htab->plt;
11277 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11278 break;
11279
11280 case DT_JMPREL:
11281 s = htab->relplt;
11282 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11283 break;
11284
11285 case DT_PLTRELSZ:
11286 dyn.d_un.d_val = htab->relplt->size;
11287 break;
11288
11289 case DT_RELASZ:
11290 /* Don't count procedure linkage table relocs in the
11291 overall reloc count. */
11292 s = htab->relplt;
11293 if (s == NULL)
11294 continue;
11295 dyn.d_un.d_val -= s->size;
11296 break;
11297
11298 case DT_RELA:
11299 /* We may not be using the standard ELF linker script.
11300 If .rela.plt is the first .rela section, we adjust
11301 DT_RELA to not include it. */
11302 s = htab->relplt;
11303 if (s == NULL)
11304 continue;
11305 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11306 continue;
11307 dyn.d_un.d_ptr += s->size;
11308 break;
11309 }
11310
11311 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11312 }
11313 }
11314
11315 if (htab->got != NULL && htab->got->size != 0)
11316 {
11317 /* Fill in the first entry in the global offset table.
11318 We use it to hold the link-time TOCbase. */
11319 bfd_put_64 (output_bfd,
11320 elf_gp (output_bfd) + TOC_BASE_OFF,
11321 htab->got->contents);
11322
11323 /* Set .got entry size. */
11324 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11325 }
11326
11327 if (htab->plt != NULL && htab->plt->size != 0)
11328 {
11329 /* Set .plt entry size. */
11330 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11331 = PLT_ENTRY_SIZE;
11332 }
11333
11334 /* We need to handle writing out multiple GOT sections ourselves,
11335 since we didn't add them to DYNOBJ. We know dynobj is the first
11336 bfd. */
11337 while ((dynobj = dynobj->link_next) != NULL)
11338 {
11339 asection *s;
11340
11341 if (!is_ppc64_elf_target (dynobj->xvec))
11342 continue;
11343
11344 s = ppc64_elf_tdata (dynobj)->got;
11345 if (s != NULL
11346 && s->size != 0
11347 && s->output_section != bfd_abs_section_ptr
11348 && !bfd_set_section_contents (output_bfd, s->output_section,
11349 s->contents, s->output_offset,
11350 s->size))
11351 return FALSE;
11352 s = ppc64_elf_tdata (dynobj)->relgot;
11353 if (s != NULL
11354 && s->size != 0
11355 && s->output_section != bfd_abs_section_ptr
11356 && !bfd_set_section_contents (output_bfd, s->output_section,
11357 s->contents, s->output_offset,
11358 s->size))
11359 return FALSE;
11360 }
11361
11362 return TRUE;
11363 }
11364
11365 #include "elf64-target.h"
GDB Binutils - Deliverables
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