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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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_init_index_section _bfd_elf_init_2_index_sections
101 #define elf_backend_action_discarded ppc64_elf_action_discarded
102 #define elf_backend_relocate_section ppc64_elf_relocate_section
103 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
104 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
105 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
106 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
107 #define elf_backend_special_sections ppc64_elf_special_sections
108
109 /* The name of the dynamic interpreter. This is put in the .interp
110 section. */
111 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
112
113 /* The size in bytes of an entry in the procedure linkage table. */
114 #define PLT_ENTRY_SIZE 24
115
116 /* The initial size of the plt reserved for the dynamic linker. */
117 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
118
119 /* TOC base pointers offset from start of TOC. */
120 #define TOC_BASE_OFF 0x8000
121
122 /* Offset of tp and dtp pointers from start of TLS block. */
123 #define TP_OFFSET 0x7000
124 #define DTP_OFFSET 0x8000
125
126 /* .plt call stub instructions. The normal stub is like this, but
127 sometimes the .plt entry crosses a 64k boundary and we need to
128 insert an addis to adjust r12. */
129 #define PLT_CALL_STUB_SIZE (7*4)
130 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
131 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
132 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
133 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
134 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
135 /* ld %r11,xxx+16@l(%r12) */
136 #define BCTR 0x4e800420 /* bctr */
137
138
139 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
140 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
141 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
142
143 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
144
145 /* glink call stub instructions. We enter with the index in R0. */
146 #define GLINK_CALL_STUB_SIZE (16*4)
147 /* 0: */
148 /* .quad plt0-1f */
149 /* __glink: */
150 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
151 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
152 /* 1: */
153 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
154 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
155 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
156 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
157 /* ld %11,0(%12) */
158 /* ld %2,8(%12) */
159 /* mtctr %11 */
160 /* ld %11,16(%12) */
161 /* bctr */
162
163 /* Pad with this. */
164 #define NOP 0x60000000
165
166 /* Some other nops. */
167 #define CROR_151515 0x4def7b82
168 #define CROR_313131 0x4ffffb82
169
170 /* .glink entries for the first 32k functions are two instructions. */
171 #define LI_R0_0 0x38000000 /* li %r0,0 */
172 #define B_DOT 0x48000000 /* b . */
173
174 /* After that, we need two instructions to load the index, followed by
175 a branch. */
176 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
177 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
178
179 /* Instructions used by the save and restore reg functions. */
180 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
181 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
182 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
183 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
184 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
185 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
186 #define LI_R12_0 0x39800000 /* li %r12,0 */
187 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
188 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
189 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
190 #define BLR 0x4e800020 /* blr */
191
192 /* Since .opd is an array of descriptors and each entry will end up
193 with identical R_PPC64_RELATIVE relocs, there is really no need to
194 propagate .opd relocs; The dynamic linker should be taught to
195 relocate .opd without reloc entries. */
196 #ifndef NO_OPD_RELOCS
197 #define NO_OPD_RELOCS 0
198 #endif
199 \f
200 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
201
202 /* Relocation HOWTO's. */
203 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
204
205 static reloc_howto_type ppc64_elf_howto_raw[] = {
206 /* This reloc does nothing. */
207 HOWTO (R_PPC64_NONE, /* type */
208 0, /* rightshift */
209 2, /* size (0 = byte, 1 = short, 2 = long) */
210 32, /* bitsize */
211 FALSE, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_dont, /* complain_on_overflow */
214 bfd_elf_generic_reloc, /* special_function */
215 "R_PPC64_NONE", /* name */
216 FALSE, /* partial_inplace */
217 0, /* src_mask */
218 0, /* dst_mask */
219 FALSE), /* pcrel_offset */
220
221 /* A standard 32 bit relocation. */
222 HOWTO (R_PPC64_ADDR32, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 32, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_bitfield, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC64_ADDR32", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0xffffffff, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* An absolute 26 bit branch; the lower two bits must be zero.
237 FIXME: we don't check that, we just clear them. */
238 HOWTO (R_PPC64_ADDR24, /* type */
239 0, /* rightshift */
240 2, /* size (0 = byte, 1 = short, 2 = long) */
241 26, /* bitsize */
242 FALSE, /* pc_relative */
243 0, /* bitpos */
244 complain_overflow_bitfield, /* complain_on_overflow */
245 bfd_elf_generic_reloc, /* special_function */
246 "R_PPC64_ADDR24", /* name */
247 FALSE, /* partial_inplace */
248 0, /* src_mask */
249 0x03fffffc, /* dst_mask */
250 FALSE), /* pcrel_offset */
251
252 /* A standard 16 bit relocation. */
253 HOWTO (R_PPC64_ADDR16, /* type */
254 0, /* rightshift */
255 1, /* size (0 = byte, 1 = short, 2 = long) */
256 16, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_bitfield, /* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_PPC64_ADDR16", /* name */
262 FALSE, /* partial_inplace */
263 0, /* src_mask */
264 0xffff, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* A 16 bit relocation without overflow. */
268 HOWTO (R_PPC64_ADDR16_LO, /* type */
269 0, /* rightshift */
270 1, /* size (0 = byte, 1 = short, 2 = long) */
271 16, /* bitsize */
272 FALSE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_dont,/* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_PPC64_ADDR16_LO", /* name */
277 FALSE, /* partial_inplace */
278 0, /* src_mask */
279 0xffff, /* dst_mask */
280 FALSE), /* pcrel_offset */
281
282 /* Bits 16-31 of an address. */
283 HOWTO (R_PPC64_ADDR16_HI, /* type */
284 16, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont, /* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_PPC64_ADDR16_HI", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
298 bits, treated as a signed number, is negative. */
299 HOWTO (R_PPC64_ADDR16_HA, /* type */
300 16, /* rightshift */
301 1, /* size (0 = byte, 1 = short, 2 = long) */
302 16, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_dont, /* complain_on_overflow */
306 ppc64_elf_ha_reloc, /* special_function */
307 "R_PPC64_ADDR16_HA", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0xffff, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 /* An absolute 16 bit branch; the lower two bits must be zero.
314 FIXME: we don't check that, we just clear them. */
315 HOWTO (R_PPC64_ADDR14, /* type */
316 0, /* rightshift */
317 2, /* size (0 = byte, 1 = short, 2 = long) */
318 16, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_bitfield, /* complain_on_overflow */
322 ppc64_elf_branch_reloc, /* special_function */
323 "R_PPC64_ADDR14", /* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0x0000fffc, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 /* An absolute 16 bit branch, for which bit 10 should be set to
330 indicate that the branch is expected to be taken. The lower two
331 bits must be zero. */
332 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
333 0, /* rightshift */
334 2, /* size (0 = byte, 1 = short, 2 = long) */
335 16, /* bitsize */
336 FALSE, /* pc_relative */
337 0, /* bitpos */
338 complain_overflow_bitfield, /* complain_on_overflow */
339 ppc64_elf_brtaken_reloc, /* special_function */
340 "R_PPC64_ADDR14_BRTAKEN",/* name */
341 FALSE, /* partial_inplace */
342 0, /* src_mask */
343 0x0000fffc, /* dst_mask */
344 FALSE), /* pcrel_offset */
345
346 /* An absolute 16 bit branch, for which bit 10 should be set to
347 indicate that the branch is not expected to be taken. The lower
348 two bits must be zero. */
349 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
350 0, /* rightshift */
351 2, /* size (0 = byte, 1 = short, 2 = long) */
352 16, /* bitsize */
353 FALSE, /* pc_relative */
354 0, /* bitpos */
355 complain_overflow_bitfield, /* complain_on_overflow */
356 ppc64_elf_brtaken_reloc, /* special_function */
357 "R_PPC64_ADDR14_BRNTAKEN",/* name */
358 FALSE, /* partial_inplace */
359 0, /* src_mask */
360 0x0000fffc, /* dst_mask */
361 FALSE), /* pcrel_offset */
362
363 /* A relative 26 bit branch; the lower two bits must be zero. */
364 HOWTO (R_PPC64_REL24, /* type */
365 0, /* rightshift */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
367 26, /* bitsize */
368 TRUE, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_signed, /* complain_on_overflow */
371 ppc64_elf_branch_reloc, /* special_function */
372 "R_PPC64_REL24", /* name */
373 FALSE, /* partial_inplace */
374 0, /* src_mask */
375 0x03fffffc, /* dst_mask */
376 TRUE), /* pcrel_offset */
377
378 /* A relative 16 bit branch; the lower two bits must be zero. */
379 HOWTO (R_PPC64_REL14, /* type */
380 0, /* rightshift */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
382 16, /* bitsize */
383 TRUE, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_signed, /* complain_on_overflow */
386 ppc64_elf_branch_reloc, /* special_function */
387 "R_PPC64_REL14", /* name */
388 FALSE, /* partial_inplace */
389 0, /* src_mask */
390 0x0000fffc, /* dst_mask */
391 TRUE), /* pcrel_offset */
392
393 /* A relative 16 bit branch. Bit 10 should be set to indicate that
394 the branch is expected to be taken. The lower two bits must be
395 zero. */
396 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
397 0, /* rightshift */
398 2, /* size (0 = byte, 1 = short, 2 = long) */
399 16, /* bitsize */
400 TRUE, /* pc_relative */
401 0, /* bitpos */
402 complain_overflow_signed, /* complain_on_overflow */
403 ppc64_elf_brtaken_reloc, /* special_function */
404 "R_PPC64_REL14_BRTAKEN", /* name */
405 FALSE, /* partial_inplace */
406 0, /* src_mask */
407 0x0000fffc, /* dst_mask */
408 TRUE), /* pcrel_offset */
409
410 /* A relative 16 bit branch. Bit 10 should be set to indicate that
411 the branch is not expected to be taken. The lower two bits must
412 be zero. */
413 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
414 0, /* rightshift */
415 2, /* size (0 = byte, 1 = short, 2 = long) */
416 16, /* bitsize */
417 TRUE, /* pc_relative */
418 0, /* bitpos */
419 complain_overflow_signed, /* complain_on_overflow */
420 ppc64_elf_brtaken_reloc, /* special_function */
421 "R_PPC64_REL14_BRNTAKEN",/* name */
422 FALSE, /* partial_inplace */
423 0, /* src_mask */
424 0x0000fffc, /* dst_mask */
425 TRUE), /* pcrel_offset */
426
427 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
428 symbol. */
429 HOWTO (R_PPC64_GOT16, /* type */
430 0, /* rightshift */
431 1, /* size (0 = byte, 1 = short, 2 = long) */
432 16, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
435 complain_overflow_signed, /* complain_on_overflow */
436 ppc64_elf_unhandled_reloc, /* special_function */
437 "R_PPC64_GOT16", /* name */
438 FALSE, /* partial_inplace */
439 0, /* src_mask */
440 0xffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
442
443 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
444 the symbol. */
445 HOWTO (R_PPC64_GOT16_LO, /* type */
446 0, /* rightshift */
447 1, /* size (0 = byte, 1 = short, 2 = long) */
448 16, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_dont, /* complain_on_overflow */
452 ppc64_elf_unhandled_reloc, /* special_function */
453 "R_PPC64_GOT16_LO", /* name */
454 FALSE, /* partial_inplace */
455 0, /* src_mask */
456 0xffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
460 the symbol. */
461 HOWTO (R_PPC64_GOT16_HI, /* type */
462 16, /* rightshift */
463 1, /* size (0 = byte, 1 = short, 2 = long) */
464 16, /* bitsize */
465 FALSE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_dont,/* complain_on_overflow */
468 ppc64_elf_unhandled_reloc, /* special_function */
469 "R_PPC64_GOT16_HI", /* name */
470 FALSE, /* partial_inplace */
471 0, /* src_mask */
472 0xffff, /* dst_mask */
473 FALSE), /* pcrel_offset */
474
475 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
476 the symbol. */
477 HOWTO (R_PPC64_GOT16_HA, /* type */
478 16, /* rightshift */
479 1, /* size (0 = byte, 1 = short, 2 = long) */
480 16, /* bitsize */
481 FALSE, /* pc_relative */
482 0, /* bitpos */
483 complain_overflow_dont,/* complain_on_overflow */
484 ppc64_elf_unhandled_reloc, /* special_function */
485 "R_PPC64_GOT16_HA", /* name */
486 FALSE, /* partial_inplace */
487 0, /* src_mask */
488 0xffff, /* dst_mask */
489 FALSE), /* pcrel_offset */
490
491 /* This is used only by the dynamic linker. The symbol should exist
492 both in the object being run and in some shared library. The
493 dynamic linker copies the data addressed by the symbol from the
494 shared library into the object, because the object being
495 run has to have the data at some particular address. */
496 HOWTO (R_PPC64_COPY, /* type */
497 0, /* rightshift */
498 0, /* this one is variable size */
499 0, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_dont, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_COPY", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR64, but used when setting global offset table
511 entries. */
512 HOWTO (R_PPC64_GLOB_DAT, /* type */
513 0, /* rightshift */
514 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
515 64, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GLOB_DAT", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 ONES (64), /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Created by the link editor. Marks a procedure linkage table
527 entry for a symbol. */
528 HOWTO (R_PPC64_JMP_SLOT, /* type */
529 0, /* rightshift */
530 0, /* size (0 = byte, 1 = short, 2 = long) */
531 0, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_dont, /* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_JMP_SLOT", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Used only by the dynamic linker. When the object is run, this
543 doubleword64 is set to the load address of the object, plus the
544 addend. */
545 HOWTO (R_PPC64_RELATIVE, /* type */
546 0, /* rightshift */
547 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
548 64, /* bitsize */
549 FALSE, /* pc_relative */
550 0, /* bitpos */
551 complain_overflow_dont, /* complain_on_overflow */
552 bfd_elf_generic_reloc, /* special_function */
553 "R_PPC64_RELATIVE", /* name */
554 FALSE, /* partial_inplace */
555 0, /* src_mask */
556 ONES (64), /* dst_mask */
557 FALSE), /* pcrel_offset */
558
559 /* Like R_PPC64_ADDR32, but may be unaligned. */
560 HOWTO (R_PPC64_UADDR32, /* type */
561 0, /* rightshift */
562 2, /* size (0 = byte, 1 = short, 2 = long) */
563 32, /* bitsize */
564 FALSE, /* pc_relative */
565 0, /* bitpos */
566 complain_overflow_bitfield, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_PPC64_UADDR32", /* name */
569 FALSE, /* partial_inplace */
570 0, /* src_mask */
571 0xffffffff, /* dst_mask */
572 FALSE), /* pcrel_offset */
573
574 /* Like R_PPC64_ADDR16, but may be unaligned. */
575 HOWTO (R_PPC64_UADDR16, /* type */
576 0, /* rightshift */
577 1, /* size (0 = byte, 1 = short, 2 = long) */
578 16, /* bitsize */
579 FALSE, /* pc_relative */
580 0, /* bitpos */
581 complain_overflow_bitfield, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC64_UADDR16", /* name */
584 FALSE, /* partial_inplace */
585 0, /* src_mask */
586 0xffff, /* dst_mask */
587 FALSE), /* pcrel_offset */
588
589 /* 32-bit PC relative. */
590 HOWTO (R_PPC64_REL32, /* type */
591 0, /* rightshift */
592 2, /* size (0 = byte, 1 = short, 2 = long) */
593 32, /* bitsize */
594 TRUE, /* pc_relative */
595 0, /* bitpos */
596 /* FIXME: Verify. Was complain_overflow_bitfield. */
597 complain_overflow_signed, /* complain_on_overflow */
598 bfd_elf_generic_reloc, /* special_function */
599 "R_PPC64_REL32", /* name */
600 FALSE, /* partial_inplace */
601 0, /* src_mask */
602 0xffffffff, /* dst_mask */
603 TRUE), /* pcrel_offset */
604
605 /* 32-bit relocation to the symbol's procedure linkage table. */
606 HOWTO (R_PPC64_PLT32, /* type */
607 0, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 32, /* bitsize */
610 FALSE, /* pc_relative */
611 0, /* bitpos */
612 complain_overflow_bitfield, /* complain_on_overflow */
613 ppc64_elf_unhandled_reloc, /* special_function */
614 "R_PPC64_PLT32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 FALSE), /* pcrel_offset */
619
620 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
621 FIXME: R_PPC64_PLTREL32 not supported. */
622 HOWTO (R_PPC64_PLTREL32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 TRUE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_signed, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC64_PLTREL32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffffffff, /* dst_mask */
634 TRUE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
637 the symbol. */
638 HOWTO (R_PPC64_PLT16_LO, /* type */
639 0, /* rightshift */
640 1, /* size (0 = byte, 1 = short, 2 = long) */
641 16, /* bitsize */
642 FALSE, /* pc_relative */
643 0, /* bitpos */
644 complain_overflow_dont, /* complain_on_overflow */
645 ppc64_elf_unhandled_reloc, /* special_function */
646 "R_PPC64_PLT16_LO", /* name */
647 FALSE, /* partial_inplace */
648 0, /* src_mask */
649 0xffff, /* dst_mask */
650 FALSE), /* pcrel_offset */
651
652 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
653 the symbol. */
654 HOWTO (R_PPC64_PLT16_HI, /* type */
655 16, /* rightshift */
656 1, /* size (0 = byte, 1 = short, 2 = long) */
657 16, /* bitsize */
658 FALSE, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_dont, /* complain_on_overflow */
661 ppc64_elf_unhandled_reloc, /* special_function */
662 "R_PPC64_PLT16_HI", /* name */
663 FALSE, /* partial_inplace */
664 0, /* src_mask */
665 0xffff, /* dst_mask */
666 FALSE), /* pcrel_offset */
667
668 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
669 the symbol. */
670 HOWTO (R_PPC64_PLT16_HA, /* type */
671 16, /* rightshift */
672 1, /* size (0 = byte, 1 = short, 2 = long) */
673 16, /* bitsize */
674 FALSE, /* pc_relative */
675 0, /* bitpos */
676 complain_overflow_dont, /* complain_on_overflow */
677 ppc64_elf_unhandled_reloc, /* special_function */
678 "R_PPC64_PLT16_HA", /* name */
679 FALSE, /* partial_inplace */
680 0, /* src_mask */
681 0xffff, /* dst_mask */
682 FALSE), /* pcrel_offset */
683
684 /* 16-bit section relative relocation. */
685 HOWTO (R_PPC64_SECTOFF, /* type */
686 0, /* rightshift */
687 1, /* size (0 = byte, 1 = short, 2 = long) */
688 16, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_bitfield, /* complain_on_overflow */
692 ppc64_elf_sectoff_reloc, /* special_function */
693 "R_PPC64_SECTOFF", /* name */
694 FALSE, /* partial_inplace */
695 0, /* src_mask */
696 0xffff, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 /* Like R_PPC64_SECTOFF, but no overflow warning. */
700 HOWTO (R_PPC64_SECTOFF_LO, /* type */
701 0, /* rightshift */
702 1, /* size (0 = byte, 1 = short, 2 = long) */
703 16, /* bitsize */
704 FALSE, /* pc_relative */
705 0, /* bitpos */
706 complain_overflow_dont, /* complain_on_overflow */
707 ppc64_elf_sectoff_reloc, /* special_function */
708 "R_PPC64_SECTOFF_LO", /* name */
709 FALSE, /* partial_inplace */
710 0, /* src_mask */
711 0xffff, /* dst_mask */
712 FALSE), /* pcrel_offset */
713
714 /* 16-bit upper half section relative relocation. */
715 HOWTO (R_PPC64_SECTOFF_HI, /* type */
716 16, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_dont, /* complain_on_overflow */
722 ppc64_elf_sectoff_reloc, /* special_function */
723 "R_PPC64_SECTOFF_HI", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* 16-bit upper half adjusted section relative relocation. */
730 HOWTO (R_PPC64_SECTOFF_HA, /* type */
731 16, /* rightshift */
732 1, /* size (0 = byte, 1 = short, 2 = long) */
733 16, /* bitsize */
734 FALSE, /* pc_relative */
735 0, /* bitpos */
736 complain_overflow_dont, /* complain_on_overflow */
737 ppc64_elf_sectoff_ha_reloc, /* special_function */
738 "R_PPC64_SECTOFF_HA", /* name */
739 FALSE, /* partial_inplace */
740 0, /* src_mask */
741 0xffff, /* dst_mask */
742 FALSE), /* pcrel_offset */
743
744 /* Like R_PPC64_REL24 without touching the two least significant bits. */
745 HOWTO (R_PPC64_REL30, /* type */
746 2, /* rightshift */
747 2, /* size (0 = byte, 1 = short, 2 = long) */
748 30, /* bitsize */
749 TRUE, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_dont, /* complain_on_overflow */
752 bfd_elf_generic_reloc, /* special_function */
753 "R_PPC64_REL30", /* name */
754 FALSE, /* partial_inplace */
755 0, /* src_mask */
756 0xfffffffc, /* dst_mask */
757 TRUE), /* pcrel_offset */
758
759 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
760
761 /* A standard 64-bit relocation. */
762 HOWTO (R_PPC64_ADDR64, /* type */
763 0, /* rightshift */
764 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
765 64, /* bitsize */
766 FALSE, /* pc_relative */
767 0, /* bitpos */
768 complain_overflow_dont, /* complain_on_overflow */
769 bfd_elf_generic_reloc, /* special_function */
770 "R_PPC64_ADDR64", /* name */
771 FALSE, /* partial_inplace */
772 0, /* src_mask */
773 ONES (64), /* dst_mask */
774 FALSE), /* pcrel_offset */
775
776 /* The bits 32-47 of an address. */
777 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
778 32, /* rightshift */
779 1, /* size (0 = byte, 1 = short, 2 = long) */
780 16, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_PPC64_ADDR16_HIGHER", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 0xffff, /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 /* The bits 32-47 of an address, plus 1 if the contents of the low
792 16 bits, treated as a signed number, is negative. */
793 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
794 32, /* rightshift */
795 1, /* size (0 = byte, 1 = short, 2 = long) */
796 16, /* bitsize */
797 FALSE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_dont, /* complain_on_overflow */
800 ppc64_elf_ha_reloc, /* special_function */
801 "R_PPC64_ADDR16_HIGHERA", /* name */
802 FALSE, /* partial_inplace */
803 0, /* src_mask */
804 0xffff, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 /* The bits 48-63 of an address. */
808 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
809 48, /* rightshift */
810 1, /* size (0 = byte, 1 = short, 2 = long) */
811 16, /* bitsize */
812 FALSE, /* pc_relative */
813 0, /* bitpos */
814 complain_overflow_dont, /* complain_on_overflow */
815 bfd_elf_generic_reloc, /* special_function */
816 "R_PPC64_ADDR16_HIGHEST", /* name */
817 FALSE, /* partial_inplace */
818 0, /* src_mask */
819 0xffff, /* dst_mask */
820 FALSE), /* pcrel_offset */
821
822 /* The bits 48-63 of an address, plus 1 if the contents of the low
823 16 bits, treated as a signed number, is negative. */
824 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
825 48, /* rightshift */
826 1, /* size (0 = byte, 1 = short, 2 = long) */
827 16, /* bitsize */
828 FALSE, /* pc_relative */
829 0, /* bitpos */
830 complain_overflow_dont, /* complain_on_overflow */
831 ppc64_elf_ha_reloc, /* special_function */
832 "R_PPC64_ADDR16_HIGHESTA", /* name */
833 FALSE, /* partial_inplace */
834 0, /* src_mask */
835 0xffff, /* dst_mask */
836 FALSE), /* pcrel_offset */
837
838 /* Like ADDR64, but may be unaligned. */
839 HOWTO (R_PPC64_UADDR64, /* type */
840 0, /* rightshift */
841 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
842 64, /* bitsize */
843 FALSE, /* pc_relative */
844 0, /* bitpos */
845 complain_overflow_dont, /* complain_on_overflow */
846 bfd_elf_generic_reloc, /* special_function */
847 "R_PPC64_UADDR64", /* name */
848 FALSE, /* partial_inplace */
849 0, /* src_mask */
850 ONES (64), /* dst_mask */
851 FALSE), /* pcrel_offset */
852
853 /* 64-bit relative relocation. */
854 HOWTO (R_PPC64_REL64, /* type */
855 0, /* rightshift */
856 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
857 64, /* bitsize */
858 TRUE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 bfd_elf_generic_reloc, /* special_function */
862 "R_PPC64_REL64", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 ONES (64), /* dst_mask */
866 TRUE), /* pcrel_offset */
867
868 /* 64-bit relocation to the symbol's procedure linkage table. */
869 HOWTO (R_PPC64_PLT64, /* type */
870 0, /* rightshift */
871 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
872 64, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 ppc64_elf_unhandled_reloc, /* special_function */
877 "R_PPC64_PLT64", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 ONES (64), /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* 64-bit PC relative relocation to the symbol's procedure linkage
884 table. */
885 /* FIXME: R_PPC64_PLTREL64 not supported. */
886 HOWTO (R_PPC64_PLTREL64, /* type */
887 0, /* rightshift */
888 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
889 64, /* bitsize */
890 TRUE, /* pc_relative */
891 0, /* bitpos */
892 complain_overflow_dont, /* complain_on_overflow */
893 ppc64_elf_unhandled_reloc, /* special_function */
894 "R_PPC64_PLTREL64", /* name */
895 FALSE, /* partial_inplace */
896 0, /* src_mask */
897 ONES (64), /* dst_mask */
898 TRUE), /* pcrel_offset */
899
900 /* 16 bit TOC-relative relocation. */
901
902 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
903 HOWTO (R_PPC64_TOC16, /* type */
904 0, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_signed, /* complain_on_overflow */
910 ppc64_elf_toc_reloc, /* special_function */
911 "R_PPC64_TOC16", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* 16 bit TOC-relative relocation without overflow. */
918
919 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
920 HOWTO (R_PPC64_TOC16_LO, /* type */
921 0, /* rightshift */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
923 16, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 ppc64_elf_toc_reloc, /* special_function */
928 "R_PPC64_TOC16_LO", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* 16 bit TOC-relative relocation, high 16 bits. */
935
936 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
937 HOWTO (R_PPC64_TOC16_HI, /* type */
938 16, /* rightshift */
939 1, /* size (0 = byte, 1 = short, 2 = long) */
940 16, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont, /* complain_on_overflow */
944 ppc64_elf_toc_reloc, /* special_function */
945 "R_PPC64_TOC16_HI", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 0xffff, /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
952 contents of the low 16 bits, treated as a signed number, is
953 negative. */
954
955 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
956 HOWTO (R_PPC64_TOC16_HA, /* type */
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc64_elf_toc_ha_reloc, /* special_function */
964 "R_PPC64_TOC16_HA", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* 64-bit relocation; insert value of TOC base (.TOC.). */
971
972 /* R_PPC64_TOC 51 doubleword64 .TOC. */
973 HOWTO (R_PPC64_TOC, /* type */
974 0, /* rightshift */
975 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
976 64, /* bitsize */
977 FALSE, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_bitfield, /* complain_on_overflow */
980 ppc64_elf_toc64_reloc, /* special_function */
981 "R_PPC64_TOC", /* name */
982 FALSE, /* partial_inplace */
983 0, /* src_mask */
984 ONES (64), /* dst_mask */
985 FALSE), /* pcrel_offset */
986
987 /* Like R_PPC64_GOT16, but also informs the link editor that the
988 value to relocate may (!) refer to a PLT entry which the link
989 editor (a) may replace with the symbol value. If the link editor
990 is unable to fully resolve the symbol, it may (b) create a PLT
991 entry and store the address to the new PLT entry in the GOT.
992 This permits lazy resolution of function symbols at run time.
993 The link editor may also skip all of this and just (c) emit a
994 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
995 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
996 HOWTO (R_PPC64_PLTGOT16, /* type */
997 0, /* rightshift */
998 1, /* size (0 = byte, 1 = short, 2 = long) */
999 16, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_signed, /* complain_on_overflow */
1003 ppc64_elf_unhandled_reloc, /* special_function */
1004 "R_PPC64_PLTGOT16", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 0xffff, /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* Like R_PPC64_PLTGOT16, but without overflow. */
1011 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1012 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1013 0, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc64_elf_unhandled_reloc, /* special_function */
1020 "R_PPC64_PLTGOT16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1027 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1028 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1029 16, /* rightshift */
1030 1, /* size (0 = byte, 1 = short, 2 = long) */
1031 16, /* bitsize */
1032 FALSE, /* pc_relative */
1033 0, /* bitpos */
1034 complain_overflow_dont, /* complain_on_overflow */
1035 ppc64_elf_unhandled_reloc, /* special_function */
1036 "R_PPC64_PLTGOT16_HI", /* name */
1037 FALSE, /* partial_inplace */
1038 0, /* src_mask */
1039 0xffff, /* dst_mask */
1040 FALSE), /* pcrel_offset */
1041
1042 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1043 1 if the contents of the low 16 bits, treated as a signed number,
1044 is negative. */
1045 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1046 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1047 16, /* rightshift */
1048 1, /* size (0 = byte, 1 = short, 2 = long) */
1049 16, /* bitsize */
1050 FALSE, /* pc_relative */
1051 0, /* bitpos */
1052 complain_overflow_dont,/* complain_on_overflow */
1053 ppc64_elf_unhandled_reloc, /* special_function */
1054 "R_PPC64_PLTGOT16_HA", /* name */
1055 FALSE, /* partial_inplace */
1056 0, /* src_mask */
1057 0xffff, /* dst_mask */
1058 FALSE), /* pcrel_offset */
1059
1060 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1061 HOWTO (R_PPC64_ADDR16_DS, /* type */
1062 0, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_bitfield, /* complain_on_overflow */
1068 bfd_elf_generic_reloc, /* special_function */
1069 "R_PPC64_ADDR16_DS", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xfffc, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1076 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1077 0, /* rightshift */
1078 1, /* size (0 = byte, 1 = short, 2 = long) */
1079 16, /* bitsize */
1080 FALSE, /* pc_relative */
1081 0, /* bitpos */
1082 complain_overflow_dont,/* complain_on_overflow */
1083 bfd_elf_generic_reloc, /* special_function */
1084 "R_PPC64_ADDR16_LO_DS",/* name */
1085 FALSE, /* partial_inplace */
1086 0, /* src_mask */
1087 0xfffc, /* dst_mask */
1088 FALSE), /* pcrel_offset */
1089
1090 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1091 HOWTO (R_PPC64_GOT16_DS, /* type */
1092 0, /* rightshift */
1093 1, /* size (0 = byte, 1 = short, 2 = long) */
1094 16, /* bitsize */
1095 FALSE, /* pc_relative */
1096 0, /* bitpos */
1097 complain_overflow_signed, /* complain_on_overflow */
1098 ppc64_elf_unhandled_reloc, /* special_function */
1099 "R_PPC64_GOT16_DS", /* name */
1100 FALSE, /* partial_inplace */
1101 0, /* src_mask */
1102 0xfffc, /* dst_mask */
1103 FALSE), /* pcrel_offset */
1104
1105 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1106 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1107 0, /* rightshift */
1108 1, /* size (0 = byte, 1 = short, 2 = long) */
1109 16, /* bitsize */
1110 FALSE, /* pc_relative */
1111 0, /* bitpos */
1112 complain_overflow_dont, /* complain_on_overflow */
1113 ppc64_elf_unhandled_reloc, /* special_function */
1114 "R_PPC64_GOT16_LO_DS", /* name */
1115 FALSE, /* partial_inplace */
1116 0, /* src_mask */
1117 0xfffc, /* dst_mask */
1118 FALSE), /* pcrel_offset */
1119
1120 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1121 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_dont, /* complain_on_overflow */
1128 ppc64_elf_unhandled_reloc, /* special_function */
1129 "R_PPC64_PLT16_LO_DS", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xfffc, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1136 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_bitfield, /* complain_on_overflow */
1143 ppc64_elf_sectoff_reloc, /* special_function */
1144 "R_PPC64_SECTOFF_DS", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xfffc, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1151 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1152 0, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_dont, /* complain_on_overflow */
1158 ppc64_elf_sectoff_reloc, /* special_function */
1159 "R_PPC64_SECTOFF_LO_DS",/* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xfffc, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1166 HOWTO (R_PPC64_TOC16_DS, /* type */
1167 0, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_signed, /* complain_on_overflow */
1173 ppc64_elf_toc_reloc, /* special_function */
1174 "R_PPC64_TOC16_DS", /* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xfffc, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1181 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1182 0, /* rightshift */
1183 1, /* size (0 = byte, 1 = short, 2 = long) */
1184 16, /* bitsize */
1185 FALSE, /* pc_relative */
1186 0, /* bitpos */
1187 complain_overflow_dont, /* complain_on_overflow */
1188 ppc64_elf_toc_reloc, /* special_function */
1189 "R_PPC64_TOC16_LO_DS", /* name */
1190 FALSE, /* partial_inplace */
1191 0, /* src_mask */
1192 0xfffc, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1194
1195 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1196 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1197 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_signed, /* complain_on_overflow */
1204 ppc64_elf_unhandled_reloc, /* special_function */
1205 "R_PPC64_PLTGOT16_DS", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1212 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1213 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1214 0, /* rightshift */
1215 1, /* size (0 = byte, 1 = short, 2 = long) */
1216 16, /* bitsize */
1217 FALSE, /* pc_relative */
1218 0, /* bitpos */
1219 complain_overflow_dont, /* complain_on_overflow */
1220 ppc64_elf_unhandled_reloc, /* special_function */
1221 "R_PPC64_PLTGOT16_LO_DS",/* name */
1222 FALSE, /* partial_inplace */
1223 0, /* src_mask */
1224 0xfffc, /* dst_mask */
1225 FALSE), /* pcrel_offset */
1226
1227 /* Marker reloc for TLS. */
1228 HOWTO (R_PPC64_TLS,
1229 0, /* rightshift */
1230 2, /* size (0 = byte, 1 = short, 2 = long) */
1231 32, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 bfd_elf_generic_reloc, /* special_function */
1236 "R_PPC64_TLS", /* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 0, /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Computes the load module index of the load module that contains the
1243 definition of its TLS sym. */
1244 HOWTO (R_PPC64_DTPMOD64,
1245 0, /* rightshift */
1246 4, /* size (0 = byte, 1 = short, 2 = long) */
1247 64, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc64_elf_unhandled_reloc, /* special_function */
1252 "R_PPC64_DTPMOD64", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 ONES (64), /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* Computes a dtv-relative displacement, the difference between the value
1259 of sym+add and the base address of the thread-local storage block that
1260 contains the definition of sym, minus 0x8000. */
1261 HOWTO (R_PPC64_DTPREL64,
1262 0, /* rightshift */
1263 4, /* size (0 = byte, 1 = short, 2 = long) */
1264 64, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_dont, /* complain_on_overflow */
1268 ppc64_elf_unhandled_reloc, /* special_function */
1269 "R_PPC64_DTPREL64", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 ONES (64), /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* A 16 bit dtprel reloc. */
1276 HOWTO (R_PPC64_DTPREL16,
1277 0, /* rightshift */
1278 1, /* size (0 = byte, 1 = short, 2 = long) */
1279 16, /* bitsize */
1280 FALSE, /* pc_relative */
1281 0, /* bitpos */
1282 complain_overflow_signed, /* complain_on_overflow */
1283 ppc64_elf_unhandled_reloc, /* special_function */
1284 "R_PPC64_DTPREL16", /* name */
1285 FALSE, /* partial_inplace */
1286 0, /* src_mask */
1287 0xffff, /* dst_mask */
1288 FALSE), /* pcrel_offset */
1289
1290 /* Like DTPREL16, but no overflow. */
1291 HOWTO (R_PPC64_DTPREL16_LO,
1292 0, /* rightshift */
1293 1, /* size (0 = byte, 1 = short, 2 = long) */
1294 16, /* bitsize */
1295 FALSE, /* pc_relative */
1296 0, /* bitpos */
1297 complain_overflow_dont, /* complain_on_overflow */
1298 ppc64_elf_unhandled_reloc, /* special_function */
1299 "R_PPC64_DTPREL16_LO", /* name */
1300 FALSE, /* partial_inplace */
1301 0, /* src_mask */
1302 0xffff, /* dst_mask */
1303 FALSE), /* pcrel_offset */
1304
1305 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1306 HOWTO (R_PPC64_DTPREL16_HI,
1307 16, /* rightshift */
1308 1, /* size (0 = byte, 1 = short, 2 = long) */
1309 16, /* bitsize */
1310 FALSE, /* pc_relative */
1311 0, /* bitpos */
1312 complain_overflow_dont, /* complain_on_overflow */
1313 ppc64_elf_unhandled_reloc, /* special_function */
1314 "R_PPC64_DTPREL16_HI", /* name */
1315 FALSE, /* partial_inplace */
1316 0, /* src_mask */
1317 0xffff, /* dst_mask */
1318 FALSE), /* pcrel_offset */
1319
1320 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1321 HOWTO (R_PPC64_DTPREL16_HA,
1322 16, /* rightshift */
1323 1, /* size (0 = byte, 1 = short, 2 = long) */
1324 16, /* bitsize */
1325 FALSE, /* pc_relative */
1326 0, /* bitpos */
1327 complain_overflow_dont, /* complain_on_overflow */
1328 ppc64_elf_unhandled_reloc, /* special_function */
1329 "R_PPC64_DTPREL16_HA", /* name */
1330 FALSE, /* partial_inplace */
1331 0, /* src_mask */
1332 0xffff, /* dst_mask */
1333 FALSE), /* pcrel_offset */
1334
1335 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1336 HOWTO (R_PPC64_DTPREL16_HIGHER,
1337 32, /* rightshift */
1338 1, /* size (0 = byte, 1 = short, 2 = long) */
1339 16, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 ppc64_elf_unhandled_reloc, /* special_function */
1344 "R_PPC64_DTPREL16_HIGHER", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0xffff, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1351 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1352 32, /* rightshift */
1353 1, /* size (0 = byte, 1 = short, 2 = long) */
1354 16, /* bitsize */
1355 FALSE, /* pc_relative */
1356 0, /* bitpos */
1357 complain_overflow_dont, /* complain_on_overflow */
1358 ppc64_elf_unhandled_reloc, /* special_function */
1359 "R_PPC64_DTPREL16_HIGHERA", /* name */
1360 FALSE, /* partial_inplace */
1361 0, /* src_mask */
1362 0xffff, /* dst_mask */
1363 FALSE), /* pcrel_offset */
1364
1365 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1366 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1367 48, /* rightshift */
1368 1, /* size (0 = byte, 1 = short, 2 = long) */
1369 16, /* bitsize */
1370 FALSE, /* pc_relative */
1371 0, /* bitpos */
1372 complain_overflow_dont, /* complain_on_overflow */
1373 ppc64_elf_unhandled_reloc, /* special_function */
1374 "R_PPC64_DTPREL16_HIGHEST", /* name */
1375 FALSE, /* partial_inplace */
1376 0, /* src_mask */
1377 0xffff, /* dst_mask */
1378 FALSE), /* pcrel_offset */
1379
1380 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1381 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1382 48, /* rightshift */
1383 1, /* size (0 = byte, 1 = short, 2 = long) */
1384 16, /* bitsize */
1385 FALSE, /* pc_relative */
1386 0, /* bitpos */
1387 complain_overflow_dont, /* complain_on_overflow */
1388 ppc64_elf_unhandled_reloc, /* special_function */
1389 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1390 FALSE, /* partial_inplace */
1391 0, /* src_mask */
1392 0xffff, /* dst_mask */
1393 FALSE), /* pcrel_offset */
1394
1395 /* Like DTPREL16, but for insns with a DS field. */
1396 HOWTO (R_PPC64_DTPREL16_DS,
1397 0, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 FALSE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_signed, /* complain_on_overflow */
1403 ppc64_elf_unhandled_reloc, /* special_function */
1404 "R_PPC64_DTPREL16_DS", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xfffc, /* dst_mask */
1408 FALSE), /* pcrel_offset */
1409
1410 /* Like DTPREL16_DS, but no overflow. */
1411 HOWTO (R_PPC64_DTPREL16_LO_DS,
1412 0, /* rightshift */
1413 1, /* size (0 = byte, 1 = short, 2 = long) */
1414 16, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 ppc64_elf_unhandled_reloc, /* special_function */
1419 "R_PPC64_DTPREL16_LO_DS", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0xfffc, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* Computes a tp-relative displacement, the difference between the value of
1426 sym+add and the value of the thread pointer (r13). */
1427 HOWTO (R_PPC64_TPREL64,
1428 0, /* rightshift */
1429 4, /* size (0 = byte, 1 = short, 2 = long) */
1430 64, /* bitsize */
1431 FALSE, /* pc_relative */
1432 0, /* bitpos */
1433 complain_overflow_dont, /* complain_on_overflow */
1434 ppc64_elf_unhandled_reloc, /* special_function */
1435 "R_PPC64_TPREL64", /* name */
1436 FALSE, /* partial_inplace */
1437 0, /* src_mask */
1438 ONES (64), /* dst_mask */
1439 FALSE), /* pcrel_offset */
1440
1441 /* A 16 bit tprel reloc. */
1442 HOWTO (R_PPC64_TPREL16,
1443 0, /* rightshift */
1444 1, /* size (0 = byte, 1 = short, 2 = long) */
1445 16, /* bitsize */
1446 FALSE, /* pc_relative */
1447 0, /* bitpos */
1448 complain_overflow_signed, /* complain_on_overflow */
1449 ppc64_elf_unhandled_reloc, /* special_function */
1450 "R_PPC64_TPREL16", /* name */
1451 FALSE, /* partial_inplace */
1452 0, /* src_mask */
1453 0xffff, /* dst_mask */
1454 FALSE), /* pcrel_offset */
1455
1456 /* Like TPREL16, but no overflow. */
1457 HOWTO (R_PPC64_TPREL16_LO,
1458 0, /* rightshift */
1459 1, /* size (0 = byte, 1 = short, 2 = long) */
1460 16, /* bitsize */
1461 FALSE, /* pc_relative */
1462 0, /* bitpos */
1463 complain_overflow_dont, /* complain_on_overflow */
1464 ppc64_elf_unhandled_reloc, /* special_function */
1465 "R_PPC64_TPREL16_LO", /* name */
1466 FALSE, /* partial_inplace */
1467 0, /* src_mask */
1468 0xffff, /* dst_mask */
1469 FALSE), /* pcrel_offset */
1470
1471 /* Like TPREL16_LO, but next higher group of 16 bits. */
1472 HOWTO (R_PPC64_TPREL16_HI,
1473 16, /* rightshift */
1474 1, /* size (0 = byte, 1 = short, 2 = long) */
1475 16, /* bitsize */
1476 FALSE, /* pc_relative */
1477 0, /* bitpos */
1478 complain_overflow_dont, /* complain_on_overflow */
1479 ppc64_elf_unhandled_reloc, /* special_function */
1480 "R_PPC64_TPREL16_HI", /* name */
1481 FALSE, /* partial_inplace */
1482 0, /* src_mask */
1483 0xffff, /* dst_mask */
1484 FALSE), /* pcrel_offset */
1485
1486 /* Like TPREL16_HI, but adjust for low 16 bits. */
1487 HOWTO (R_PPC64_TPREL16_HA,
1488 16, /* rightshift */
1489 1, /* size (0 = byte, 1 = short, 2 = long) */
1490 16, /* bitsize */
1491 FALSE, /* pc_relative */
1492 0, /* bitpos */
1493 complain_overflow_dont, /* complain_on_overflow */
1494 ppc64_elf_unhandled_reloc, /* special_function */
1495 "R_PPC64_TPREL16_HA", /* name */
1496 FALSE, /* partial_inplace */
1497 0, /* src_mask */
1498 0xffff, /* dst_mask */
1499 FALSE), /* pcrel_offset */
1500
1501 /* Like TPREL16_HI, but next higher group of 16 bits. */
1502 HOWTO (R_PPC64_TPREL16_HIGHER,
1503 32, /* rightshift */
1504 1, /* size (0 = byte, 1 = short, 2 = long) */
1505 16, /* bitsize */
1506 FALSE, /* pc_relative */
1507 0, /* bitpos */
1508 complain_overflow_dont, /* complain_on_overflow */
1509 ppc64_elf_unhandled_reloc, /* special_function */
1510 "R_PPC64_TPREL16_HIGHER", /* name */
1511 FALSE, /* partial_inplace */
1512 0, /* src_mask */
1513 0xffff, /* dst_mask */
1514 FALSE), /* pcrel_offset */
1515
1516 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1517 HOWTO (R_PPC64_TPREL16_HIGHERA,
1518 32, /* rightshift */
1519 1, /* size (0 = byte, 1 = short, 2 = long) */
1520 16, /* bitsize */
1521 FALSE, /* pc_relative */
1522 0, /* bitpos */
1523 complain_overflow_dont, /* complain_on_overflow */
1524 ppc64_elf_unhandled_reloc, /* special_function */
1525 "R_PPC64_TPREL16_HIGHERA", /* name */
1526 FALSE, /* partial_inplace */
1527 0, /* src_mask */
1528 0xffff, /* dst_mask */
1529 FALSE), /* pcrel_offset */
1530
1531 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1532 HOWTO (R_PPC64_TPREL16_HIGHEST,
1533 48, /* rightshift */
1534 1, /* size (0 = byte, 1 = short, 2 = long) */
1535 16, /* bitsize */
1536 FALSE, /* pc_relative */
1537 0, /* bitpos */
1538 complain_overflow_dont, /* complain_on_overflow */
1539 ppc64_elf_unhandled_reloc, /* special_function */
1540 "R_PPC64_TPREL16_HIGHEST", /* name */
1541 FALSE, /* partial_inplace */
1542 0, /* src_mask */
1543 0xffff, /* dst_mask */
1544 FALSE), /* pcrel_offset */
1545
1546 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1547 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1548 48, /* rightshift */
1549 1, /* size (0 = byte, 1 = short, 2 = long) */
1550 16, /* bitsize */
1551 FALSE, /* pc_relative */
1552 0, /* bitpos */
1553 complain_overflow_dont, /* complain_on_overflow */
1554 ppc64_elf_unhandled_reloc, /* special_function */
1555 "R_PPC64_TPREL16_HIGHESTA", /* name */
1556 FALSE, /* partial_inplace */
1557 0, /* src_mask */
1558 0xffff, /* dst_mask */
1559 FALSE), /* pcrel_offset */
1560
1561 /* Like TPREL16, but for insns with a DS field. */
1562 HOWTO (R_PPC64_TPREL16_DS,
1563 0, /* rightshift */
1564 1, /* size (0 = byte, 1 = short, 2 = long) */
1565 16, /* bitsize */
1566 FALSE, /* pc_relative */
1567 0, /* bitpos */
1568 complain_overflow_signed, /* complain_on_overflow */
1569 ppc64_elf_unhandled_reloc, /* special_function */
1570 "R_PPC64_TPREL16_DS", /* name */
1571 FALSE, /* partial_inplace */
1572 0, /* src_mask */
1573 0xfffc, /* dst_mask */
1574 FALSE), /* pcrel_offset */
1575
1576 /* Like TPREL16_DS, but no overflow. */
1577 HOWTO (R_PPC64_TPREL16_LO_DS,
1578 0, /* rightshift */
1579 1, /* size (0 = byte, 1 = short, 2 = long) */
1580 16, /* bitsize */
1581 FALSE, /* pc_relative */
1582 0, /* bitpos */
1583 complain_overflow_dont, /* complain_on_overflow */
1584 ppc64_elf_unhandled_reloc, /* special_function */
1585 "R_PPC64_TPREL16_LO_DS", /* name */
1586 FALSE, /* partial_inplace */
1587 0, /* src_mask */
1588 0xfffc, /* dst_mask */
1589 FALSE), /* pcrel_offset */
1590
1591 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1592 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1593 to the first entry relative to the TOC base (r2). */
1594 HOWTO (R_PPC64_GOT_TLSGD16,
1595 0, /* rightshift */
1596 1, /* size (0 = byte, 1 = short, 2 = long) */
1597 16, /* bitsize */
1598 FALSE, /* pc_relative */
1599 0, /* bitpos */
1600 complain_overflow_signed, /* complain_on_overflow */
1601 ppc64_elf_unhandled_reloc, /* special_function */
1602 "R_PPC64_GOT_TLSGD16", /* name */
1603 FALSE, /* partial_inplace */
1604 0, /* src_mask */
1605 0xffff, /* dst_mask */
1606 FALSE), /* pcrel_offset */
1607
1608 /* Like GOT_TLSGD16, but no overflow. */
1609 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1610 0, /* rightshift */
1611 1, /* size (0 = byte, 1 = short, 2 = long) */
1612 16, /* bitsize */
1613 FALSE, /* pc_relative */
1614 0, /* bitpos */
1615 complain_overflow_dont, /* complain_on_overflow */
1616 ppc64_elf_unhandled_reloc, /* special_function */
1617 "R_PPC64_GOT_TLSGD16_LO", /* name */
1618 FALSE, /* partial_inplace */
1619 0, /* src_mask */
1620 0xffff, /* dst_mask */
1621 FALSE), /* pcrel_offset */
1622
1623 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1624 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1625 16, /* rightshift */
1626 1, /* size (0 = byte, 1 = short, 2 = long) */
1627 16, /* bitsize */
1628 FALSE, /* pc_relative */
1629 0, /* bitpos */
1630 complain_overflow_dont, /* complain_on_overflow */
1631 ppc64_elf_unhandled_reloc, /* special_function */
1632 "R_PPC64_GOT_TLSGD16_HI", /* name */
1633 FALSE, /* partial_inplace */
1634 0, /* src_mask */
1635 0xffff, /* dst_mask */
1636 FALSE), /* pcrel_offset */
1637
1638 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1639 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1640 16, /* rightshift */
1641 1, /* size (0 = byte, 1 = short, 2 = long) */
1642 16, /* bitsize */
1643 FALSE, /* pc_relative */
1644 0, /* bitpos */
1645 complain_overflow_dont, /* complain_on_overflow */
1646 ppc64_elf_unhandled_reloc, /* special_function */
1647 "R_PPC64_GOT_TLSGD16_HA", /* name */
1648 FALSE, /* partial_inplace */
1649 0, /* src_mask */
1650 0xffff, /* dst_mask */
1651 FALSE), /* pcrel_offset */
1652
1653 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1654 with values (sym+add)@dtpmod and zero, and computes the offset to the
1655 first entry relative to the TOC base (r2). */
1656 HOWTO (R_PPC64_GOT_TLSLD16,
1657 0, /* rightshift */
1658 1, /* size (0 = byte, 1 = short, 2 = long) */
1659 16, /* bitsize */
1660 FALSE, /* pc_relative */
1661 0, /* bitpos */
1662 complain_overflow_signed, /* complain_on_overflow */
1663 ppc64_elf_unhandled_reloc, /* special_function */
1664 "R_PPC64_GOT_TLSLD16", /* name */
1665 FALSE, /* partial_inplace */
1666 0, /* src_mask */
1667 0xffff, /* dst_mask */
1668 FALSE), /* pcrel_offset */
1669
1670 /* Like GOT_TLSLD16, but no overflow. */
1671 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1672 0, /* rightshift */
1673 1, /* size (0 = byte, 1 = short, 2 = long) */
1674 16, /* bitsize */
1675 FALSE, /* pc_relative */
1676 0, /* bitpos */
1677 complain_overflow_dont, /* complain_on_overflow */
1678 ppc64_elf_unhandled_reloc, /* special_function */
1679 "R_PPC64_GOT_TLSLD16_LO", /* name */
1680 FALSE, /* partial_inplace */
1681 0, /* src_mask */
1682 0xffff, /* dst_mask */
1683 FALSE), /* pcrel_offset */
1684
1685 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1686 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1687 16, /* rightshift */
1688 1, /* size (0 = byte, 1 = short, 2 = long) */
1689 16, /* bitsize */
1690 FALSE, /* pc_relative */
1691 0, /* bitpos */
1692 complain_overflow_dont, /* complain_on_overflow */
1693 ppc64_elf_unhandled_reloc, /* special_function */
1694 "R_PPC64_GOT_TLSLD16_HI", /* name */
1695 FALSE, /* partial_inplace */
1696 0, /* src_mask */
1697 0xffff, /* dst_mask */
1698 FALSE), /* pcrel_offset */
1699
1700 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1701 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1702 16, /* rightshift */
1703 1, /* size (0 = byte, 1 = short, 2 = long) */
1704 16, /* bitsize */
1705 FALSE, /* pc_relative */
1706 0, /* bitpos */
1707 complain_overflow_dont, /* complain_on_overflow */
1708 ppc64_elf_unhandled_reloc, /* special_function */
1709 "R_PPC64_GOT_TLSLD16_HA", /* name */
1710 FALSE, /* partial_inplace */
1711 0, /* src_mask */
1712 0xffff, /* dst_mask */
1713 FALSE), /* pcrel_offset */
1714
1715 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1716 the offset to the entry relative to the TOC base (r2). */
1717 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_signed, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_DTPREL16_DS", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xfffc, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_DTPREL16_DS, but no overflow. */
1732 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1733 0, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_dont, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xfffc, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1747 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_dont, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_DTPREL16_HI", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1762 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1763 16, /* rightshift */
1764 1, /* size (0 = byte, 1 = short, 2 = long) */
1765 16, /* bitsize */
1766 FALSE, /* pc_relative */
1767 0, /* bitpos */
1768 complain_overflow_dont, /* complain_on_overflow */
1769 ppc64_elf_unhandled_reloc, /* special_function */
1770 "R_PPC64_GOT_DTPREL16_HA", /* name */
1771 FALSE, /* partial_inplace */
1772 0, /* src_mask */
1773 0xffff, /* dst_mask */
1774 FALSE), /* pcrel_offset */
1775
1776 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1777 offset to the entry relative to the TOC base (r2). */
1778 HOWTO (R_PPC64_GOT_TPREL16_DS,
1779 0, /* rightshift */
1780 1, /* size (0 = byte, 1 = short, 2 = long) */
1781 16, /* bitsize */
1782 FALSE, /* pc_relative */
1783 0, /* bitpos */
1784 complain_overflow_signed, /* complain_on_overflow */
1785 ppc64_elf_unhandled_reloc, /* special_function */
1786 "R_PPC64_GOT_TPREL16_DS", /* name */
1787 FALSE, /* partial_inplace */
1788 0, /* src_mask */
1789 0xfffc, /* dst_mask */
1790 FALSE), /* pcrel_offset */
1791
1792 /* Like GOT_TPREL16_DS, but no overflow. */
1793 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1794 0, /* rightshift */
1795 1, /* size (0 = byte, 1 = short, 2 = long) */
1796 16, /* bitsize */
1797 FALSE, /* pc_relative */
1798 0, /* bitpos */
1799 complain_overflow_dont, /* complain_on_overflow */
1800 ppc64_elf_unhandled_reloc, /* special_function */
1801 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1802 FALSE, /* partial_inplace */
1803 0, /* src_mask */
1804 0xfffc, /* dst_mask */
1805 FALSE), /* pcrel_offset */
1806
1807 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1808 HOWTO (R_PPC64_GOT_TPREL16_HI,
1809 16, /* rightshift */
1810 1, /* size (0 = byte, 1 = short, 2 = long) */
1811 16, /* bitsize */
1812 FALSE, /* pc_relative */
1813 0, /* bitpos */
1814 complain_overflow_dont, /* complain_on_overflow */
1815 ppc64_elf_unhandled_reloc, /* special_function */
1816 "R_PPC64_GOT_TPREL16_HI", /* name */
1817 FALSE, /* partial_inplace */
1818 0, /* src_mask */
1819 0xffff, /* dst_mask */
1820 FALSE), /* pcrel_offset */
1821
1822 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1823 HOWTO (R_PPC64_GOT_TPREL16_HA,
1824 16, /* rightshift */
1825 1, /* size (0 = byte, 1 = short, 2 = long) */
1826 16, /* bitsize */
1827 FALSE, /* pc_relative */
1828 0, /* bitpos */
1829 complain_overflow_dont, /* complain_on_overflow */
1830 ppc64_elf_unhandled_reloc, /* special_function */
1831 "R_PPC64_GOT_TPREL16_HA", /* name */
1832 FALSE, /* partial_inplace */
1833 0, /* src_mask */
1834 0xffff, /* dst_mask */
1835 FALSE), /* pcrel_offset */
1836
1837 /* GNU extension to record C++ vtable hierarchy. */
1838 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1839 0, /* rightshift */
1840 0, /* size (0 = byte, 1 = short, 2 = long) */
1841 0, /* bitsize */
1842 FALSE, /* pc_relative */
1843 0, /* bitpos */
1844 complain_overflow_dont, /* complain_on_overflow */
1845 NULL, /* special_function */
1846 "R_PPC64_GNU_VTINHERIT", /* name */
1847 FALSE, /* partial_inplace */
1848 0, /* src_mask */
1849 0, /* dst_mask */
1850 FALSE), /* pcrel_offset */
1851
1852 /* GNU extension to record C++ vtable member usage. */
1853 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1854 0, /* rightshift */
1855 0, /* size (0 = byte, 1 = short, 2 = long) */
1856 0, /* bitsize */
1857 FALSE, /* pc_relative */
1858 0, /* bitpos */
1859 complain_overflow_dont, /* complain_on_overflow */
1860 NULL, /* special_function */
1861 "R_PPC64_GNU_VTENTRY", /* name */
1862 FALSE, /* partial_inplace */
1863 0, /* src_mask */
1864 0, /* dst_mask */
1865 FALSE), /* pcrel_offset */
1866 };
1867
1868 \f
1869 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1870 be done. */
1871
1872 static void
1873 ppc_howto_init (void)
1874 {
1875 unsigned int i, type;
1876
1877 for (i = 0;
1878 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1879 i++)
1880 {
1881 type = ppc64_elf_howto_raw[i].type;
1882 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1883 / sizeof (ppc64_elf_howto_table[0])));
1884 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1885 }
1886 }
1887
1888 static reloc_howto_type *
1889 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1890 bfd_reloc_code_real_type code)
1891 {
1892 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1893
1894 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1895 /* Initialize howto table if needed. */
1896 ppc_howto_init ();
1897
1898 switch (code)
1899 {
1900 default:
1901 return NULL;
1902
1903 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1904 break;
1905 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1906 break;
1907 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1908 break;
1909 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1910 break;
1911 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1912 break;
1913 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1914 break;
1915 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1916 break;
1917 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1918 break;
1919 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1920 break;
1921 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1922 break;
1923 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1924 break;
1925 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1926 break;
1927 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1928 break;
1929 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1930 break;
1931 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1932 break;
1933 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1934 break;
1935 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1936 break;
1937 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1938 break;
1939 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1940 break;
1941 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1942 break;
1943 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1944 break;
1945 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1946 break;
1947 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1948 break;
1949 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1950 break;
1951 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1952 break;
1953 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1954 break;
1955 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1956 break;
1957 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1958 break;
1959 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1960 break;
1961 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1962 break;
1963 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1964 break;
1965 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1966 break;
1967 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1968 break;
1969 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1970 break;
1971 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1972 break;
1973 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1974 break;
1975 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1976 break;
1977 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1978 break;
1979 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1980 break;
1981 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1982 break;
1983 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1984 break;
1985 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1986 break;
1987 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1988 break;
1989 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1990 break;
1991 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1992 break;
1993 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1994 break;
1995 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1996 break;
1997 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1998 break;
1999 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2000 break;
2001 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2002 break;
2003 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2004 break;
2005 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2006 break;
2007 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2008 break;
2009 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2010 break;
2011 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2012 break;
2013 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2014 break;
2015 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2018 break;
2019 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2020 break;
2021 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2022 break;
2023 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2024 break;
2025 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2026 break;
2027 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2028 break;
2029 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2030 break;
2031 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2032 break;
2033 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2034 break;
2035 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2036 break;
2037 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2038 break;
2039 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2040 break;
2041 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2042 break;
2043 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2052 break;
2053 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2066 break;
2067 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2068 break;
2069 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2070 break;
2071 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2072 break;
2073 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2074 break;
2075 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2076 break;
2077 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2078 break;
2079 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2080 break;
2081 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2082 break;
2083 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2084 break;
2085 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2086 break;
2087 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2088 break;
2089 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2090 break;
2091 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2092 break;
2093 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2094 break;
2095 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2096 break;
2097 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2098 break;
2099 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2100 break;
2101 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2102 break;
2103 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2104 break;
2105 }
2106
2107 return ppc64_elf_howto_table[r];
2108 };
2109
2110 /* Set the howto pointer for a PowerPC ELF reloc. */
2111
2112 static void
2113 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2114 Elf_Internal_Rela *dst)
2115 {
2116 unsigned int type;
2117
2118 /* Initialize howto table if needed. */
2119 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2120 ppc_howto_init ();
2121
2122 type = ELF64_R_TYPE (dst->r_info);
2123 if (type >= (sizeof (ppc64_elf_howto_table)
2124 / sizeof (ppc64_elf_howto_table[0])))
2125 {
2126 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2127 abfd, (int) type);
2128 type = R_PPC64_NONE;
2129 }
2130 cache_ptr->howto = ppc64_elf_howto_table[type];
2131 }
2132
2133 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2134
2135 static bfd_reloc_status_type
2136 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2137 void *data, asection *input_section,
2138 bfd *output_bfd, char **error_message)
2139 {
2140 /* If this is a relocatable link (output_bfd test tells us), just
2141 call the generic function. Any adjustment will be done at final
2142 link time. */
2143 if (output_bfd != NULL)
2144 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2145 input_section, output_bfd, error_message);
2146
2147 /* Adjust the addend for sign extension of the low 16 bits.
2148 We won't actually be using the low 16 bits, so trashing them
2149 doesn't matter. */
2150 reloc_entry->addend += 0x8000;
2151 return bfd_reloc_continue;
2152 }
2153
2154 static bfd_reloc_status_type
2155 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2156 void *data, asection *input_section,
2157 bfd *output_bfd, char **error_message)
2158 {
2159 if (output_bfd != NULL)
2160 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2161 input_section, output_bfd, error_message);
2162
2163 if (strcmp (symbol->section->name, ".opd") == 0
2164 && (symbol->section->owner->flags & DYNAMIC) == 0)
2165 {
2166 bfd_vma dest = opd_entry_value (symbol->section,
2167 symbol->value + reloc_entry->addend,
2168 NULL, NULL);
2169 if (dest != (bfd_vma) -1)
2170 reloc_entry->addend = dest - (symbol->value
2171 + symbol->section->output_section->vma
2172 + symbol->section->output_offset);
2173 }
2174 return bfd_reloc_continue;
2175 }
2176
2177 static bfd_reloc_status_type
2178 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2179 void *data, asection *input_section,
2180 bfd *output_bfd, char **error_message)
2181 {
2182 long insn;
2183 enum elf_ppc64_reloc_type r_type;
2184 bfd_size_type octets;
2185 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2186 bfd_boolean is_power4 = FALSE;
2187
2188 /* If this is a relocatable link (output_bfd test tells us), just
2189 call the generic function. Any adjustment will be done at final
2190 link time. */
2191 if (output_bfd != NULL)
2192 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2193 input_section, output_bfd, error_message);
2194
2195 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2196 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2197 insn &= ~(0x01 << 21);
2198 r_type = reloc_entry->howto->type;
2199 if (r_type == R_PPC64_ADDR14_BRTAKEN
2200 || r_type == R_PPC64_REL14_BRTAKEN)
2201 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2202
2203 if (is_power4)
2204 {
2205 /* Set 'a' bit. This is 0b00010 in BO field for branch
2206 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2207 for branch on CTR insns (BO == 1a00t or 1a01t). */
2208 if ((insn & (0x14 << 21)) == (0x04 << 21))
2209 insn |= 0x02 << 21;
2210 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2211 insn |= 0x08 << 21;
2212 else
2213 goto out;
2214 }
2215 else
2216 {
2217 bfd_vma target = 0;
2218 bfd_vma from;
2219
2220 if (!bfd_is_com_section (symbol->section))
2221 target = symbol->value;
2222 target += symbol->section->output_section->vma;
2223 target += symbol->section->output_offset;
2224 target += reloc_entry->addend;
2225
2226 from = (reloc_entry->address
2227 + input_section->output_offset
2228 + input_section->output_section->vma);
2229
2230 /* Invert 'y' bit if not the default. */
2231 if ((bfd_signed_vma) (target - from) < 0)
2232 insn ^= 0x01 << 21;
2233 }
2234 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2235 out:
2236 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2237 input_section, output_bfd, error_message);
2238 }
2239
2240 static bfd_reloc_status_type
2241 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2242 void *data, asection *input_section,
2243 bfd *output_bfd, char **error_message)
2244 {
2245 /* If this is a relocatable link (output_bfd test tells us), just
2246 call the generic function. Any adjustment will be done at final
2247 link time. */
2248 if (output_bfd != NULL)
2249 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2250 input_section, output_bfd, error_message);
2251
2252 /* Subtract the symbol section base address. */
2253 reloc_entry->addend -= symbol->section->output_section->vma;
2254 return bfd_reloc_continue;
2255 }
2256
2257 static bfd_reloc_status_type
2258 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2259 void *data, asection *input_section,
2260 bfd *output_bfd, char **error_message)
2261 {
2262 /* If this is a relocatable link (output_bfd test tells us), just
2263 call the generic function. Any adjustment will be done at final
2264 link time. */
2265 if (output_bfd != NULL)
2266 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2267 input_section, output_bfd, error_message);
2268
2269 /* Subtract the symbol section base address. */
2270 reloc_entry->addend -= symbol->section->output_section->vma;
2271
2272 /* Adjust the addend for sign extension of the low 16 bits. */
2273 reloc_entry->addend += 0x8000;
2274 return bfd_reloc_continue;
2275 }
2276
2277 static bfd_reloc_status_type
2278 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2279 void *data, asection *input_section,
2280 bfd *output_bfd, char **error_message)
2281 {
2282 bfd_vma TOCstart;
2283
2284 /* If this is a relocatable link (output_bfd test tells us), just
2285 call the generic function. Any adjustment will be done at final
2286 link time. */
2287 if (output_bfd != NULL)
2288 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2289 input_section, output_bfd, error_message);
2290
2291 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2292 if (TOCstart == 0)
2293 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2294
2295 /* Subtract the TOC base address. */
2296 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2297 return bfd_reloc_continue;
2298 }
2299
2300 static bfd_reloc_status_type
2301 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2302 void *data, asection *input_section,
2303 bfd *output_bfd, char **error_message)
2304 {
2305 bfd_vma TOCstart;
2306
2307 /* If this is a relocatable link (output_bfd test tells us), just
2308 call the generic function. Any adjustment will be done at final
2309 link time. */
2310 if (output_bfd != NULL)
2311 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2312 input_section, output_bfd, error_message);
2313
2314 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2315 if (TOCstart == 0)
2316 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2317
2318 /* Subtract the TOC base address. */
2319 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2320
2321 /* Adjust the addend for sign extension of the low 16 bits. */
2322 reloc_entry->addend += 0x8000;
2323 return bfd_reloc_continue;
2324 }
2325
2326 static bfd_reloc_status_type
2327 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2328 void *data, asection *input_section,
2329 bfd *output_bfd, char **error_message)
2330 {
2331 bfd_vma TOCstart;
2332 bfd_size_type octets;
2333
2334 /* If this is a relocatable link (output_bfd test tells us), just
2335 call the generic function. Any adjustment will be done at final
2336 link time. */
2337 if (output_bfd != NULL)
2338 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2339 input_section, output_bfd, error_message);
2340
2341 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2342 if (TOCstart == 0)
2343 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2344
2345 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2346 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2347 return bfd_reloc_ok;
2348 }
2349
2350 static bfd_reloc_status_type
2351 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2352 void *data, asection *input_section,
2353 bfd *output_bfd, char **error_message)
2354 {
2355 /* If this is a relocatable link (output_bfd test tells us), just
2356 call the generic function. Any adjustment will be done at final
2357 link time. */
2358 if (output_bfd != NULL)
2359 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2360 input_section, output_bfd, error_message);
2361
2362 if (error_message != NULL)
2363 {
2364 static char buf[60];
2365 sprintf (buf, "generic linker can't handle %s",
2366 reloc_entry->howto->name);
2367 *error_message = buf;
2368 }
2369 return bfd_reloc_dangerous;
2370 }
2371
2372 struct ppc64_elf_obj_tdata
2373 {
2374 struct elf_obj_tdata elf;
2375
2376 /* Shortcuts to dynamic linker sections. */
2377 asection *got;
2378 asection *relgot;
2379
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 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2385 sections means we potentially need one of these for each input bfd. */
2386 union {
2387 bfd_signed_vma refcount;
2388 bfd_vma offset;
2389 } tlsld_got;
2390
2391 /* A copy of relocs before they are modified for --emit-relocs. */
2392 Elf_Internal_Rela *opd_relocs;
2393 };
2394
2395 #define ppc64_elf_tdata(bfd) \
2396 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2397
2398 #define ppc64_tlsld_got(bfd) \
2399 (&ppc64_elf_tdata (bfd)->tlsld_got)
2400
2401 /* Override the generic function because we store some extras. */
2402
2403 static bfd_boolean
2404 ppc64_elf_mkobject (bfd *abfd)
2405 {
2406 if (abfd->tdata.any == NULL)
2407 {
2408 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2409 abfd->tdata.any = bfd_zalloc (abfd, amt);
2410 if (abfd->tdata.any == NULL)
2411 return FALSE;
2412 }
2413 return bfd_elf_mkobject (abfd);
2414 }
2415
2416 /* Return 1 if target is one of ours. */
2417
2418 static bfd_boolean
2419 is_ppc64_elf_target (const struct bfd_target *targ)
2420 {
2421 extern const bfd_target bfd_elf64_powerpc_vec;
2422 extern const bfd_target bfd_elf64_powerpcle_vec;
2423
2424 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2425 }
2426
2427 /* Fix bad default arch selected for a 64 bit input bfd when the
2428 default is 32 bit. */
2429
2430 static bfd_boolean
2431 ppc64_elf_object_p (bfd *abfd)
2432 {
2433 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2434 {
2435 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2436
2437 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2438 {
2439 /* Relies on arch after 32 bit default being 64 bit default. */
2440 abfd->arch_info = abfd->arch_info->next;
2441 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2442 }
2443 }
2444 return TRUE;
2445 }
2446
2447 /* Support for core dump NOTE sections. */
2448
2449 static bfd_boolean
2450 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2451 {
2452 size_t offset, size;
2453
2454 if (note->descsz != 504)
2455 return FALSE;
2456
2457 /* pr_cursig */
2458 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2459
2460 /* pr_pid */
2461 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2462
2463 /* pr_reg */
2464 offset = 112;
2465 size = 384;
2466
2467 /* Make a ".reg/999" section. */
2468 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2469 size, note->descpos + offset);
2470 }
2471
2472 static bfd_boolean
2473 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2474 {
2475 if (note->descsz != 136)
2476 return FALSE;
2477
2478 elf_tdata (abfd)->core_program
2479 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2480 elf_tdata (abfd)->core_command
2481 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2482
2483 return TRUE;
2484 }
2485
2486 /* Merge backend specific data from an object file to the output
2487 object file when linking. */
2488
2489 static bfd_boolean
2490 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2491 {
2492 /* Check if we have the same endianess. */
2493 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2494 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2495 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2496 {
2497 const char *msg;
2498
2499 if (bfd_big_endian (ibfd))
2500 msg = _("%B: compiled for a big endian system "
2501 "and target is little endian");
2502 else
2503 msg = _("%B: compiled for a little endian system "
2504 "and target is big endian");
2505
2506 (*_bfd_error_handler) (msg, ibfd);
2507
2508 bfd_set_error (bfd_error_wrong_format);
2509 return FALSE;
2510 }
2511
2512 return TRUE;
2513 }
2514
2515 /* Add extra PPC sections. */
2516
2517 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2518 {
2519 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2520 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2521 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2522 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2523 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2524 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2525 { NULL, 0, 0, 0, 0 }
2526 };
2527
2528 struct _ppc64_elf_section_data
2529 {
2530 struct bfd_elf_section_data elf;
2531
2532 /* An array with one entry for each opd function descriptor. */
2533 union
2534 {
2535 /* Points to the function code section for local opd entries. */
2536 asection **func_sec;
2537 /* After editing .opd, adjust references to opd local syms. */
2538 long *adjust;
2539 } opd;
2540
2541 /* An array for toc sections, indexed by offset/8.
2542 Specifies the relocation symbol index used at a given toc offset. */
2543 unsigned *t_symndx;
2544 };
2545
2546 #define ppc64_elf_section_data(sec) \
2547 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2548
2549 static bfd_boolean
2550 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2551 {
2552 if (!sec->used_by_bfd)
2553 {
2554 struct _ppc64_elf_section_data *sdata;
2555 bfd_size_type amt = sizeof (*sdata);
2556
2557 sdata = bfd_zalloc (abfd, amt);
2558 if (sdata == NULL)
2559 return FALSE;
2560 sec->used_by_bfd = sdata;
2561 }
2562
2563 return _bfd_elf_new_section_hook (abfd, sec);
2564 }
2565
2566 static void *
2567 get_opd_info (asection * sec)
2568 {
2569 if (sec != NULL
2570 && ppc64_elf_section_data (sec) != NULL
2571 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2572 return ppc64_elf_section_data (sec)->opd.adjust;
2573 return NULL;
2574 }
2575 \f
2576 /* Parameters for the qsort hook. */
2577 static asection *synthetic_opd;
2578 static bfd_boolean synthetic_relocatable;
2579
2580 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2581
2582 static int
2583 compare_symbols (const void *ap, const void *bp)
2584 {
2585 const asymbol *a = * (const asymbol **) ap;
2586 const asymbol *b = * (const asymbol **) bp;
2587
2588 /* Section symbols first. */
2589 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2590 return -1;
2591 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2592 return 1;
2593
2594 /* then .opd symbols. */
2595 if (a->section == synthetic_opd && b->section != synthetic_opd)
2596 return -1;
2597 if (a->section != synthetic_opd && b->section == synthetic_opd)
2598 return 1;
2599
2600 /* then other code symbols. */
2601 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2602 == (SEC_CODE | SEC_ALLOC)
2603 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2604 != (SEC_CODE | SEC_ALLOC))
2605 return -1;
2606
2607 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2608 != (SEC_CODE | SEC_ALLOC)
2609 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2610 == (SEC_CODE | SEC_ALLOC))
2611 return 1;
2612
2613 if (synthetic_relocatable)
2614 {
2615 if (a->section->id < b->section->id)
2616 return -1;
2617
2618 if (a->section->id > b->section->id)
2619 return 1;
2620 }
2621
2622 if (a->value + a->section->vma < b->value + b->section->vma)
2623 return -1;
2624
2625 if (a->value + a->section->vma > b->value + b->section->vma)
2626 return 1;
2627
2628 /* For syms with the same value, prefer strong dynamic global function
2629 syms over other syms. */
2630 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2631 return -1;
2632
2633 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2634 return 1;
2635
2636 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2637 return -1;
2638
2639 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2640 return 1;
2641
2642 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2643 return -1;
2644
2645 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2646 return 1;
2647
2648 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2649 return -1;
2650
2651 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2652 return 1;
2653
2654 return 0;
2655 }
2656
2657 /* Search SYMS for a symbol of the given VALUE. */
2658
2659 static asymbol *
2660 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2661 {
2662 long mid;
2663
2664 if (id == -1)
2665 {
2666 while (lo < hi)
2667 {
2668 mid = (lo + hi) >> 1;
2669 if (syms[mid]->value + syms[mid]->section->vma < value)
2670 lo = mid + 1;
2671 else if (syms[mid]->value + syms[mid]->section->vma > value)
2672 hi = mid;
2673 else
2674 return syms[mid];
2675 }
2676 }
2677 else
2678 {
2679 while (lo < hi)
2680 {
2681 mid = (lo + hi) >> 1;
2682 if (syms[mid]->section->id < id)
2683 lo = mid + 1;
2684 else if (syms[mid]->section->id > id)
2685 hi = mid;
2686 else if (syms[mid]->value < value)
2687 lo = mid + 1;
2688 else if (syms[mid]->value > value)
2689 hi = mid;
2690 else
2691 return syms[mid];
2692 }
2693 }
2694 return NULL;
2695 }
2696
2697 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2698 entry syms. */
2699
2700 static long
2701 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2702 long static_count, asymbol **static_syms,
2703 long dyn_count, asymbol **dyn_syms,
2704 asymbol **ret)
2705 {
2706 asymbol *s;
2707 long i;
2708 long count;
2709 char *names;
2710 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2711 asection *opd;
2712 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2713 asymbol **syms;
2714
2715 *ret = NULL;
2716
2717 opd = bfd_get_section_by_name (abfd, ".opd");
2718 if (opd == NULL)
2719 return 0;
2720
2721 symcount = static_count;
2722 if (!relocatable)
2723 symcount += dyn_count;
2724 if (symcount == 0)
2725 return 0;
2726
2727 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2728 if (syms == NULL)
2729 return -1;
2730
2731 if (!relocatable && static_count != 0 && dyn_count != 0)
2732 {
2733 /* Use both symbol tables. */
2734 memcpy (syms, static_syms, static_count * sizeof (*syms));
2735 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2736 }
2737 else if (!relocatable && static_count == 0)
2738 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2739 else
2740 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2741
2742 synthetic_opd = opd;
2743 synthetic_relocatable = relocatable;
2744 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2745
2746 if (!relocatable && symcount > 1)
2747 {
2748 long j;
2749 /* Trim duplicate syms, since we may have merged the normal and
2750 dynamic symbols. Actually, we only care about syms that have
2751 different values, so trim any with the same value. */
2752 for (i = 1, j = 1; i < symcount; ++i)
2753 if (syms[i - 1]->value + syms[i - 1]->section->vma
2754 != syms[i]->value + syms[i]->section->vma)
2755 syms[j++] = syms[i];
2756 symcount = j;
2757 }
2758
2759 i = 0;
2760 if (syms[i]->section == opd)
2761 ++i;
2762 codesecsym = i;
2763
2764 for (; i < symcount; ++i)
2765 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2766 != (SEC_CODE | SEC_ALLOC))
2767 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2768 break;
2769 codesecsymend = i;
2770
2771 for (; i < symcount; ++i)
2772 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2773 break;
2774 secsymend = i;
2775
2776 for (; i < symcount; ++i)
2777 if (syms[i]->section != opd)
2778 break;
2779 opdsymend = i;
2780
2781 for (; i < symcount; ++i)
2782 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2783 != (SEC_CODE | SEC_ALLOC))
2784 break;
2785 symcount = i;
2786
2787 count = 0;
2788 if (opdsymend == secsymend)
2789 goto done;
2790
2791 if (relocatable)
2792 {
2793 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2794 arelent *r;
2795 size_t size;
2796 long relcount;
2797
2798 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2799 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2800 if (relcount == 0)
2801 goto done;
2802
2803 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2804 {
2805 count = -1;
2806 goto done;
2807 }
2808
2809 size = 0;
2810 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2811 {
2812 asymbol *sym;
2813
2814 while (r < opd->relocation + relcount
2815 && r->address < syms[i]->value + opd->vma)
2816 ++r;
2817
2818 if (r == opd->relocation + relcount)
2819 break;
2820
2821 if (r->address != syms[i]->value + opd->vma)
2822 continue;
2823
2824 if (r->howto->type != R_PPC64_ADDR64)
2825 continue;
2826
2827 sym = *r->sym_ptr_ptr;
2828 if (!sym_exists_at (syms, opdsymend, symcount,
2829 sym->section->id, sym->value + r->addend))
2830 {
2831 ++count;
2832 size += sizeof (asymbol);
2833 size += strlen (syms[i]->name) + 2;
2834 }
2835 }
2836
2837 s = *ret = bfd_malloc (size);
2838 if (s == NULL)
2839 {
2840 count = -1;
2841 goto done;
2842 }
2843
2844 names = (char *) (s + count);
2845
2846 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2847 {
2848 asymbol *sym;
2849
2850 while (r < opd->relocation + relcount
2851 && r->address < syms[i]->value + opd->vma)
2852 ++r;
2853
2854 if (r == opd->relocation + relcount)
2855 break;
2856
2857 if (r->address != syms[i]->value + opd->vma)
2858 continue;
2859
2860 if (r->howto->type != R_PPC64_ADDR64)
2861 continue;
2862
2863 sym = *r->sym_ptr_ptr;
2864 if (!sym_exists_at (syms, opdsymend, symcount,
2865 sym->section->id, sym->value + r->addend))
2866 {
2867 size_t len;
2868
2869 *s = *syms[i];
2870 s->section = sym->section;
2871 s->value = sym->value + r->addend;
2872 s->name = names;
2873 *names++ = '.';
2874 len = strlen (syms[i]->name);
2875 memcpy (names, syms[i]->name, len + 1);
2876 names += len + 1;
2877 s++;
2878 }
2879 }
2880 }
2881 else
2882 {
2883 bfd_byte *contents;
2884 size_t size;
2885
2886 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2887 {
2888 if (contents)
2889 {
2890 free_contents_and_exit:
2891 free (contents);
2892 }
2893 count = -1;
2894 goto done;
2895 }
2896
2897 size = 0;
2898 for (i = secsymend; i < opdsymend; ++i)
2899 {
2900 bfd_vma ent;
2901
2902 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2903 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2904 {
2905 ++count;
2906 size += sizeof (asymbol);
2907 size += strlen (syms[i]->name) + 2;
2908 }
2909 }
2910
2911 s = *ret = bfd_malloc (size);
2912 if (s == NULL)
2913 goto free_contents_and_exit;
2914
2915 names = (char *) (s + count);
2916
2917 for (i = secsymend; i < opdsymend; ++i)
2918 {
2919 bfd_vma ent;
2920
2921 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2922 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2923 {
2924 long lo, hi;
2925 size_t len;
2926 asection *sec = abfd->sections;
2927
2928 *s = *syms[i];
2929 lo = codesecsym;
2930 hi = codesecsymend;
2931 while (lo < hi)
2932 {
2933 long mid = (lo + hi) >> 1;
2934 if (syms[mid]->section->vma < ent)
2935 lo = mid + 1;
2936 else if (syms[mid]->section->vma > ent)
2937 hi = mid;
2938 else
2939 {
2940 sec = syms[mid]->section;
2941 break;
2942 }
2943 }
2944
2945 if (lo >= hi && lo > codesecsym)
2946 sec = syms[lo - 1]->section;
2947
2948 for (; sec != NULL; sec = sec->next)
2949 {
2950 if (sec->vma > ent)
2951 break;
2952 if ((sec->flags & SEC_ALLOC) == 0
2953 || (sec->flags & SEC_LOAD) == 0)
2954 break;
2955 if ((sec->flags & SEC_CODE) != 0)
2956 s->section = sec;
2957 }
2958 s->value = ent - s->section->vma;
2959 s->name = names;
2960 *names++ = '.';
2961 len = strlen (syms[i]->name);
2962 memcpy (names, syms[i]->name, len + 1);
2963 names += len + 1;
2964 s++;
2965 }
2966 }
2967 free (contents);
2968 }
2969
2970 done:
2971 free (syms);
2972 return count;
2973 }
2974 \f
2975 /* The following functions are specific to the ELF linker, while
2976 functions above are used generally. Those named ppc64_elf_* are
2977 called by the main ELF linker code. They appear in this file more
2978 or less in the order in which they are called. eg.
2979 ppc64_elf_check_relocs is called early in the link process,
2980 ppc64_elf_finish_dynamic_sections is one of the last functions
2981 called.
2982
2983 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2984 functions have both a function code symbol and a function descriptor
2985 symbol. A call to foo in a relocatable object file looks like:
2986
2987 . .text
2988 . x:
2989 . bl .foo
2990 . nop
2991
2992 The function definition in another object file might be:
2993
2994 . .section .opd
2995 . foo: .quad .foo
2996 . .quad .TOC.@tocbase
2997 . .quad 0
2998 .
2999 . .text
3000 . .foo: blr
3001
3002 When the linker resolves the call during a static link, the branch
3003 unsurprisingly just goes to .foo and the .opd information is unused.
3004 If the function definition is in a shared library, things are a little
3005 different: The call goes via a plt call stub, the opd information gets
3006 copied to the plt, and the linker patches the nop.
3007
3008 . x:
3009 . bl .foo_stub
3010 . ld 2,40(1)
3011 .
3012 .
3013 . .foo_stub:
3014 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3015 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3016 . std 2,40(1) # this is the general idea
3017 . ld 11,0(12)
3018 . ld 2,8(12)
3019 . mtctr 11
3020 . ld 11,16(12)
3021 . bctr
3022 .
3023 . .section .plt
3024 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3025
3026 The "reloc ()" notation is supposed to indicate that the linker emits
3027 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3028 copying.
3029
3030 What are the difficulties here? Well, firstly, the relocations
3031 examined by the linker in check_relocs are against the function code
3032 sym .foo, while the dynamic relocation in the plt is emitted against
3033 the function descriptor symbol, foo. Somewhere along the line, we need
3034 to carefully copy dynamic link information from one symbol to the other.
3035 Secondly, the generic part of the elf linker will make .foo a dynamic
3036 symbol as is normal for most other backends. We need foo dynamic
3037 instead, at least for an application final link. However, when
3038 creating a shared library containing foo, we need to have both symbols
3039 dynamic so that references to .foo are satisfied during the early
3040 stages of linking. Otherwise the linker might decide to pull in a
3041 definition from some other object, eg. a static library.
3042
3043 Update: As of August 2004, we support a new convention. Function
3044 calls may use the function descriptor symbol, ie. "bl foo". This
3045 behaves exactly as "bl .foo". */
3046
3047 /* The linker needs to keep track of the number of relocs that it
3048 decides to copy as dynamic relocs in check_relocs for each symbol.
3049 This is so that it can later discard them if they are found to be
3050 unnecessary. We store the information in a field extending the
3051 regular ELF linker hash table. */
3052
3053 struct ppc_dyn_relocs
3054 {
3055 struct ppc_dyn_relocs *next;
3056
3057 /* The input section of the reloc. */
3058 asection *sec;
3059
3060 /* Total number of relocs copied for the input section. */
3061 bfd_size_type count;
3062
3063 /* Number of pc-relative relocs copied for the input section. */
3064 bfd_size_type pc_count;
3065 };
3066
3067 /* Track GOT entries needed for a given symbol. We might need more
3068 than one got entry per symbol. */
3069 struct got_entry
3070 {
3071 struct got_entry *next;
3072
3073 /* The symbol addend that we'll be placing in the GOT. */
3074 bfd_vma addend;
3075
3076 /* Unlike other ELF targets, we use separate GOT entries for the same
3077 symbol referenced from different input files. This is to support
3078 automatic multiple TOC/GOT sections, where the TOC base can vary
3079 from one input file to another.
3080
3081 Point to the BFD owning this GOT entry. */
3082 bfd *owner;
3083
3084 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3085 TLS_TPREL or TLS_DTPREL for tls entries. */
3086 char tls_type;
3087
3088 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3089 union
3090 {
3091 bfd_signed_vma refcount;
3092 bfd_vma offset;
3093 } got;
3094 };
3095
3096 /* The same for PLT. */
3097 struct plt_entry
3098 {
3099 struct plt_entry *next;
3100
3101 bfd_vma addend;
3102
3103 union
3104 {
3105 bfd_signed_vma refcount;
3106 bfd_vma offset;
3107 } plt;
3108 };
3109
3110 /* Of those relocs that might be copied as dynamic relocs, this macro
3111 selects those that must be copied when linking a shared library,
3112 even when the symbol is local. */
3113
3114 #define MUST_BE_DYN_RELOC(RTYPE) \
3115 ((RTYPE) != R_PPC64_REL32 \
3116 && (RTYPE) != R_PPC64_REL64 \
3117 && (RTYPE) != R_PPC64_REL30)
3118
3119 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3120 copying dynamic variables from a shared lib into an app's dynbss
3121 section, and instead use a dynamic relocation to point into the
3122 shared lib. With code that gcc generates, it's vital that this be
3123 enabled; In the PowerPC64 ABI, the address of a function is actually
3124 the address of a function descriptor, which resides in the .opd
3125 section. gcc uses the descriptor directly rather than going via the
3126 GOT as some other ABI's do, which means that initialized function
3127 pointers must reference the descriptor. Thus, a function pointer
3128 initialized to the address of a function in a shared library will
3129 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3130 redefines the function descriptor symbol to point to the copy. This
3131 presents a problem as a plt entry for that function is also
3132 initialized from the function descriptor symbol and the copy reloc
3133 may not be initialized first. */
3134 #define ELIMINATE_COPY_RELOCS 1
3135
3136 /* Section name for stubs is the associated section name plus this
3137 string. */
3138 #define STUB_SUFFIX ".stub"
3139
3140 /* Linker stubs.
3141 ppc_stub_long_branch:
3142 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3143 destination, but a 24 bit branch in a stub section will reach.
3144 . b dest
3145
3146 ppc_stub_plt_branch:
3147 Similar to the above, but a 24 bit branch in the stub section won't
3148 reach its destination.
3149 . addis %r12,%r2,xxx@toc@ha
3150 . ld %r11,xxx@toc@l(%r12)
3151 . mtctr %r11
3152 . bctr
3153
3154 ppc_stub_plt_call:
3155 Used to call a function in a shared library. If it so happens that
3156 the plt entry referenced crosses a 64k boundary, then an extra
3157 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3158 xxx+16 as appropriate.
3159 . addis %r12,%r2,xxx@toc@ha
3160 . std %r2,40(%r1)
3161 . ld %r11,xxx+0@toc@l(%r12)
3162 . ld %r2,xxx+8@toc@l(%r12)
3163 . mtctr %r11
3164 . ld %r11,xxx+16@toc@l(%r12)
3165 . bctr
3166
3167 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3168 code to adjust the value and save r2 to support multiple toc sections.
3169 A ppc_stub_long_branch with an r2 offset looks like:
3170 . std %r2,40(%r1)
3171 . addis %r2,%r2,off@ha
3172 . addi %r2,%r2,off@l
3173 . b dest
3174
3175 A ppc_stub_plt_branch with an r2 offset looks like:
3176 . std %r2,40(%r1)
3177 . addis %r12,%r2,xxx@toc@ha
3178 . ld %r11,xxx@toc@l(%r12)
3179 . addis %r2,%r2,off@ha
3180 . addi %r2,%r2,off@l
3181 . mtctr %r11
3182 . bctr
3183 */
3184
3185 enum ppc_stub_type {
3186 ppc_stub_none,
3187 ppc_stub_long_branch,
3188 ppc_stub_long_branch_r2off,
3189 ppc_stub_plt_branch,
3190 ppc_stub_plt_branch_r2off,
3191 ppc_stub_plt_call
3192 };
3193
3194 struct ppc_stub_hash_entry {
3195
3196 /* Base hash table entry structure. */
3197 struct bfd_hash_entry root;
3198
3199 enum ppc_stub_type stub_type;
3200
3201 /* The stub section. */
3202 asection *stub_sec;
3203
3204 /* Offset within stub_sec of the beginning of this stub. */
3205 bfd_vma stub_offset;
3206
3207 /* Given the symbol's value and its section we can determine its final
3208 value when building the stubs (so the stub knows where to jump. */
3209 bfd_vma target_value;
3210 asection *target_section;
3211
3212 /* The symbol table entry, if any, that this was derived from. */
3213 struct ppc_link_hash_entry *h;
3214
3215 /* And the reloc addend that this was derived from. */
3216 bfd_vma addend;
3217
3218 /* Where this stub is being called from, or, in the case of combined
3219 stub sections, the first input section in the group. */
3220 asection *id_sec;
3221 };
3222
3223 struct ppc_branch_hash_entry {
3224
3225 /* Base hash table entry structure. */
3226 struct bfd_hash_entry root;
3227
3228 /* Offset within branch lookup table. */
3229 unsigned int offset;
3230
3231 /* Generation marker. */
3232 unsigned int iter;
3233 };
3234
3235 struct ppc_link_hash_entry
3236 {
3237 struct elf_link_hash_entry elf;
3238
3239 union {
3240 /* A pointer to the most recently used stub hash entry against this
3241 symbol. */
3242 struct ppc_stub_hash_entry *stub_cache;
3243
3244 /* A pointer to the next symbol starting with a '.' */
3245 struct ppc_link_hash_entry *next_dot_sym;
3246 } u;
3247
3248 /* Track dynamic relocs copied for this symbol. */
3249 struct ppc_dyn_relocs *dyn_relocs;
3250
3251 /* Link between function code and descriptor symbols. */
3252 struct ppc_link_hash_entry *oh;
3253
3254 /* Flag function code and descriptor symbols. */
3255 unsigned int is_func:1;
3256 unsigned int is_func_descriptor:1;
3257 unsigned int fake:1;
3258
3259 /* Whether global opd/toc sym has been adjusted or not.
3260 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3261 should be set for all globals defined in any opd/toc section. */
3262 unsigned int adjust_done:1;
3263
3264 /* Set if we twiddled this symbol to weak at some stage. */
3265 unsigned int was_undefined:1;
3266
3267 /* Contexts in which symbol is used in the GOT (or TOC).
3268 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3269 corresponding relocs are encountered during check_relocs.
3270 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3271 indicate the corresponding GOT entry type is not needed.
3272 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3273 a TPREL one. We use a separate flag rather than setting TPREL
3274 just for convenience in distinguishing the two cases. */
3275 #define TLS_GD 1 /* GD reloc. */
3276 #define TLS_LD 2 /* LD reloc. */
3277 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3278 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3279 #define TLS_TLS 16 /* Any TLS reloc. */
3280 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3281 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3282 char tls_mask;
3283 };
3284
3285 /* ppc64 ELF linker hash table. */
3286
3287 struct ppc_link_hash_table
3288 {
3289 struct elf_link_hash_table elf;
3290
3291 /* The stub hash table. */
3292 struct bfd_hash_table stub_hash_table;
3293
3294 /* Another hash table for plt_branch stubs. */
3295 struct bfd_hash_table branch_hash_table;
3296
3297 /* Linker stub bfd. */
3298 bfd *stub_bfd;
3299
3300 /* Linker call-backs. */
3301 asection * (*add_stub_section) (const char *, asection *);
3302 void (*layout_sections_again) (void);
3303
3304 /* Array to keep track of which stub sections have been created, and
3305 information on stub grouping. */
3306 struct map_stub {
3307 /* This is the section to which stubs in the group will be attached. */
3308 asection *link_sec;
3309 /* The stub section. */
3310 asection *stub_sec;
3311 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3312 bfd_vma toc_off;
3313 } *stub_group;
3314
3315 /* Temp used when calculating TOC pointers. */
3316 bfd_vma toc_curr;
3317
3318 /* Highest input section id. */
3319 int top_id;
3320
3321 /* Highest output section index. */
3322 int top_index;
3323
3324 /* Used when adding symbols. */
3325 struct ppc_link_hash_entry *dot_syms;
3326
3327 /* List of input sections for each output section. */
3328 asection **input_list;
3329
3330 /* Short-cuts to get to dynamic linker sections. */
3331 asection *got;
3332 asection *plt;
3333 asection *relplt;
3334 asection *dynbss;
3335 asection *relbss;
3336 asection *glink;
3337 asection *sfpr;
3338 asection *brlt;
3339 asection *relbrlt;
3340
3341 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3342 struct ppc_link_hash_entry *tls_get_addr;
3343 struct ppc_link_hash_entry *tls_get_addr_fd;
3344
3345 /* Statistics. */
3346 unsigned long stub_count[ppc_stub_plt_call];
3347
3348 /* Number of stubs against global syms. */
3349 unsigned long stub_globals;
3350
3351 /* Set if we should emit symbols for stubs. */
3352 unsigned int emit_stub_syms:1;
3353
3354 /* Support for multiple toc sections. */
3355 unsigned int no_multi_toc:1;
3356 unsigned int multi_toc_needed:1;
3357
3358 /* Set on error. */
3359 unsigned int stub_error:1;
3360
3361 /* Flag set when small branches are detected. Used to
3362 select suitable defaults for the stub group size. */
3363 unsigned int has_14bit_branch:1;
3364
3365 /* Temp used by ppc64_elf_check_directives. */
3366 unsigned int twiddled_syms:1;
3367
3368 /* Incremented every time we size stubs. */
3369 unsigned int stub_iteration;
3370
3371 /* Small local sym to section mapping cache. */
3372 struct sym_sec_cache sym_sec;
3373 };
3374
3375 /* Rename some of the generic section flags to better document how they
3376 are used here. */
3377 #define has_toc_reloc has_gp_reloc
3378 #define makes_toc_func_call need_finalize_relax
3379 #define call_check_in_progress reloc_done
3380
3381 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3382
3383 #define ppc_hash_table(p) \
3384 ((struct ppc_link_hash_table *) ((p)->hash))
3385
3386 #define ppc_stub_hash_lookup(table, string, create, copy) \
3387 ((struct ppc_stub_hash_entry *) \
3388 bfd_hash_lookup ((table), (string), (create), (copy)))
3389
3390 #define ppc_branch_hash_lookup(table, string, create, copy) \
3391 ((struct ppc_branch_hash_entry *) \
3392 bfd_hash_lookup ((table), (string), (create), (copy)))
3393
3394 /* Create an entry in the stub hash table. */
3395
3396 static struct bfd_hash_entry *
3397 stub_hash_newfunc (struct bfd_hash_entry *entry,
3398 struct bfd_hash_table *table,
3399 const char *string)
3400 {
3401 /* Allocate the structure if it has not already been allocated by a
3402 subclass. */
3403 if (entry == NULL)
3404 {
3405 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3406 if (entry == NULL)
3407 return entry;
3408 }
3409
3410 /* Call the allocation method of the superclass. */
3411 entry = bfd_hash_newfunc (entry, table, string);
3412 if (entry != NULL)
3413 {
3414 struct ppc_stub_hash_entry *eh;
3415
3416 /* Initialize the local fields. */
3417 eh = (struct ppc_stub_hash_entry *) entry;
3418 eh->stub_type = ppc_stub_none;
3419 eh->stub_sec = NULL;
3420 eh->stub_offset = 0;
3421 eh->target_value = 0;
3422 eh->target_section = NULL;
3423 eh->h = NULL;
3424 eh->id_sec = NULL;
3425 }
3426
3427 return entry;
3428 }
3429
3430 /* Create an entry in the branch hash table. */
3431
3432 static struct bfd_hash_entry *
3433 branch_hash_newfunc (struct bfd_hash_entry *entry,
3434 struct bfd_hash_table *table,
3435 const char *string)
3436 {
3437 /* Allocate the structure if it has not already been allocated by a
3438 subclass. */
3439 if (entry == NULL)
3440 {
3441 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3442 if (entry == NULL)
3443 return entry;
3444 }
3445
3446 /* Call the allocation method of the superclass. */
3447 entry = bfd_hash_newfunc (entry, table, string);
3448 if (entry != NULL)
3449 {
3450 struct ppc_branch_hash_entry *eh;
3451
3452 /* Initialize the local fields. */
3453 eh = (struct ppc_branch_hash_entry *) entry;
3454 eh->offset = 0;
3455 eh->iter = 0;
3456 }
3457
3458 return entry;
3459 }
3460
3461 /* Create an entry in a ppc64 ELF linker hash table. */
3462
3463 static struct bfd_hash_entry *
3464 link_hash_newfunc (struct bfd_hash_entry *entry,
3465 struct bfd_hash_table *table,
3466 const char *string)
3467 {
3468 /* Allocate the structure if it has not already been allocated by a
3469 subclass. */
3470 if (entry == NULL)
3471 {
3472 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3473 if (entry == NULL)
3474 return entry;
3475 }
3476
3477 /* Call the allocation method of the superclass. */
3478 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3479 if (entry != NULL)
3480 {
3481 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3482
3483 memset (&eh->u.stub_cache, 0,
3484 (sizeof (struct ppc_link_hash_entry)
3485 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3486
3487 /* When making function calls, old ABI code references function entry
3488 points (dot symbols), while new ABI code references the function
3489 descriptor symbol. We need to make any combination of reference and
3490 definition work together, without breaking archive linking.
3491
3492 For a defined function "foo" and an undefined call to "bar":
3493 An old object defines "foo" and ".foo", references ".bar" (possibly
3494 "bar" too).
3495 A new object defines "foo" and references "bar".
3496
3497 A new object thus has no problem with its undefined symbols being
3498 satisfied by definitions in an old object. On the other hand, the
3499 old object won't have ".bar" satisfied by a new object.
3500
3501 Keep a list of newly added dot-symbols. */
3502
3503 if (string[0] == '.')
3504 {
3505 struct ppc_link_hash_table *htab;
3506
3507 htab = (struct ppc_link_hash_table *) table;
3508 eh->u.next_dot_sym = htab->dot_syms;
3509 htab->dot_syms = eh;
3510 }
3511 }
3512
3513 return entry;
3514 }
3515
3516 /* Create a ppc64 ELF linker hash table. */
3517
3518 static struct bfd_link_hash_table *
3519 ppc64_elf_link_hash_table_create (bfd *abfd)
3520 {
3521 struct ppc_link_hash_table *htab;
3522 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3523
3524 htab = bfd_zmalloc (amt);
3525 if (htab == NULL)
3526 return NULL;
3527
3528 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3529 sizeof (struct ppc_link_hash_entry)))
3530 {
3531 free (htab);
3532 return NULL;
3533 }
3534
3535 /* Init the stub hash table too. */
3536 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3537 sizeof (struct ppc_stub_hash_entry)))
3538 return NULL;
3539
3540 /* And the branch hash table. */
3541 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3542 sizeof (struct ppc_branch_hash_entry)))
3543 return NULL;
3544
3545 /* Initializing two fields of the union is just cosmetic. We really
3546 only care about glist, but when compiled on a 32-bit host the
3547 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3548 debugger inspection of these fields look nicer. */
3549 htab->elf.init_got_refcount.refcount = 0;
3550 htab->elf.init_got_refcount.glist = NULL;
3551 htab->elf.init_plt_refcount.refcount = 0;
3552 htab->elf.init_plt_refcount.glist = NULL;
3553 htab->elf.init_got_offset.offset = 0;
3554 htab->elf.init_got_offset.glist = NULL;
3555 htab->elf.init_plt_offset.offset = 0;
3556 htab->elf.init_plt_offset.glist = NULL;
3557
3558 return &htab->elf.root;
3559 }
3560
3561 /* Free the derived linker hash table. */
3562
3563 static void
3564 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3565 {
3566 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3567
3568 bfd_hash_table_free (&ret->stub_hash_table);
3569 bfd_hash_table_free (&ret->branch_hash_table);
3570 _bfd_generic_link_hash_table_free (hash);
3571 }
3572
3573 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3574
3575 void
3576 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3577 {
3578 struct ppc_link_hash_table *htab;
3579
3580 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3581
3582 /* Always hook our dynamic sections into the first bfd, which is the
3583 linker created stub bfd. This ensures that the GOT header is at
3584 the start of the output TOC section. */
3585 htab = ppc_hash_table (info);
3586 htab->stub_bfd = abfd;
3587 htab->elf.dynobj = abfd;
3588 }
3589
3590 /* Build a name for an entry in the stub hash table. */
3591
3592 static char *
3593 ppc_stub_name (const asection *input_section,
3594 const asection *sym_sec,
3595 const struct ppc_link_hash_entry *h,
3596 const Elf_Internal_Rela *rel)
3597 {
3598 char *stub_name;
3599 bfd_size_type len;
3600
3601 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3602 offsets from a sym as a branch target? In fact, we could
3603 probably assume the addend is always zero. */
3604 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3605
3606 if (h)
3607 {
3608 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3609 stub_name = bfd_malloc (len);
3610 if (stub_name == NULL)
3611 return stub_name;
3612
3613 sprintf (stub_name, "%08x.%s+%x",
3614 input_section->id & 0xffffffff,
3615 h->elf.root.root.string,
3616 (int) rel->r_addend & 0xffffffff);
3617 }
3618 else
3619 {
3620 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3621 stub_name = bfd_malloc (len);
3622 if (stub_name == NULL)
3623 return stub_name;
3624
3625 sprintf (stub_name, "%08x.%x:%x+%x",
3626 input_section->id & 0xffffffff,
3627 sym_sec->id & 0xffffffff,
3628 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3629 (int) rel->r_addend & 0xffffffff);
3630 }
3631 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3632 stub_name[len - 2] = 0;
3633 return stub_name;
3634 }
3635
3636 /* Look up an entry in the stub hash. Stub entries are cached because
3637 creating the stub name takes a bit of time. */
3638
3639 static struct ppc_stub_hash_entry *
3640 ppc_get_stub_entry (const asection *input_section,
3641 const asection *sym_sec,
3642 struct ppc_link_hash_entry *h,
3643 const Elf_Internal_Rela *rel,
3644 struct ppc_link_hash_table *htab)
3645 {
3646 struct ppc_stub_hash_entry *stub_entry;
3647 const asection *id_sec;
3648
3649 /* If this input section is part of a group of sections sharing one
3650 stub section, then use the id of the first section in the group.
3651 Stub names need to include a section id, as there may well be
3652 more than one stub used to reach say, printf, and we need to
3653 distinguish between them. */
3654 id_sec = htab->stub_group[input_section->id].link_sec;
3655
3656 if (h != NULL && h->u.stub_cache != NULL
3657 && h->u.stub_cache->h == h
3658 && h->u.stub_cache->id_sec == id_sec)
3659 {
3660 stub_entry = h->u.stub_cache;
3661 }
3662 else
3663 {
3664 char *stub_name;
3665
3666 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3667 if (stub_name == NULL)
3668 return NULL;
3669
3670 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3671 stub_name, FALSE, FALSE);
3672 if (h != NULL)
3673 h->u.stub_cache = stub_entry;
3674
3675 free (stub_name);
3676 }
3677
3678 return stub_entry;
3679 }
3680
3681 /* Add a new stub entry to the stub hash. Not all fields of the new
3682 stub entry are initialised. */
3683
3684 static struct ppc_stub_hash_entry *
3685 ppc_add_stub (const char *stub_name,
3686 asection *section,
3687 struct ppc_link_hash_table *htab)
3688 {
3689 asection *link_sec;
3690 asection *stub_sec;
3691 struct ppc_stub_hash_entry *stub_entry;
3692
3693 link_sec = htab->stub_group[section->id].link_sec;
3694 stub_sec = htab->stub_group[section->id].stub_sec;
3695 if (stub_sec == NULL)
3696 {
3697 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3698 if (stub_sec == NULL)
3699 {
3700 size_t namelen;
3701 bfd_size_type len;
3702 char *s_name;
3703
3704 namelen = strlen (link_sec->name);
3705 len = namelen + sizeof (STUB_SUFFIX);
3706 s_name = bfd_alloc (htab->stub_bfd, len);
3707 if (s_name == NULL)
3708 return NULL;
3709
3710 memcpy (s_name, link_sec->name, namelen);
3711 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3712 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3713 if (stub_sec == NULL)
3714 return NULL;
3715 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3716 }
3717 htab->stub_group[section->id].stub_sec = stub_sec;
3718 }
3719
3720 /* Enter this entry into the linker stub hash table. */
3721 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3722 TRUE, FALSE);
3723 if (stub_entry == NULL)
3724 {
3725 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3726 section->owner, stub_name);
3727 return NULL;
3728 }
3729
3730 stub_entry->stub_sec = stub_sec;
3731 stub_entry->stub_offset = 0;
3732 stub_entry->id_sec = link_sec;
3733 return stub_entry;
3734 }
3735
3736 /* Create sections for linker generated code. */
3737
3738 static bfd_boolean
3739 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3740 {
3741 struct ppc_link_hash_table *htab;
3742 flagword flags;
3743
3744 htab = ppc_hash_table (info);
3745
3746 /* Create .sfpr for code to save and restore fp regs. */
3747 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3748 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3749 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3750 flags);
3751 if (htab->sfpr == NULL
3752 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3753 return FALSE;
3754
3755 /* Create .glink for lazy dynamic linking support. */
3756 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3757 flags);
3758 if (htab->glink == NULL
3759 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3760 return FALSE;
3761
3762 /* Create branch lookup table for plt_branch stubs. */
3763 if (info->shared)
3764 {
3765 flags = (SEC_ALLOC | SEC_LOAD
3766 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3767 htab->brlt
3768 = bfd_make_section_anyway_with_flags (dynobj, ".data.rel.ro.brlt",
3769 flags);
3770 }
3771 else
3772 {
3773 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3774 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3775 htab->brlt
3776 = bfd_make_section_anyway_with_flags (dynobj, ".rodata.brlt", flags);
3777 }
3778
3779 if (htab->brlt == NULL
3780 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3781 return FALSE;
3782
3783 if (info->shared)
3784 {
3785 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3786 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3787 htab->relbrlt
3788 = bfd_make_section_anyway_with_flags (dynobj, ".rela.data.rel.ro.brlt",
3789 flags);
3790 }
3791 else if (info->emitrelocations)
3792 {
3793 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3794 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3795 htab->relbrlt
3796 = bfd_make_section_anyway_with_flags (dynobj, ".rela.rodata.brlt",
3797 flags);
3798 }
3799 else
3800 return TRUE;
3801
3802 if (!htab->relbrlt
3803 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3804 return FALSE;
3805
3806 return TRUE;
3807 }
3808
3809 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3810 not already done. */
3811
3812 static bfd_boolean
3813 create_got_section (bfd *abfd, struct bfd_link_info *info)
3814 {
3815 asection *got, *relgot;
3816 flagword flags;
3817 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3818
3819 if (!htab->got)
3820 {
3821 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3822 return FALSE;
3823
3824 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3825 if (!htab->got)
3826 abort ();
3827 }
3828
3829 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3830 | SEC_LINKER_CREATED);
3831
3832 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3833 if (!got
3834 || !bfd_set_section_alignment (abfd, got, 3))
3835 return FALSE;
3836
3837 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3838 flags | SEC_READONLY);
3839 if (!relgot
3840 || ! bfd_set_section_alignment (abfd, relgot, 3))
3841 return FALSE;
3842
3843 ppc64_elf_tdata (abfd)->got = got;
3844 ppc64_elf_tdata (abfd)->relgot = relgot;
3845 return TRUE;
3846 }
3847
3848 /* Create the dynamic sections, and set up shortcuts. */
3849
3850 static bfd_boolean
3851 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3852 {
3853 struct ppc_link_hash_table *htab;
3854
3855 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3856 return FALSE;
3857
3858 htab = ppc_hash_table (info);
3859 if (!htab->got)
3860 htab->got = bfd_get_section_by_name (dynobj, ".got");
3861 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3862 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3863 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3864 if (!info->shared)
3865 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3866
3867 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3868 || (!info->shared && !htab->relbss))
3869 abort ();
3870
3871 return TRUE;
3872 }
3873
3874 /* Merge PLT info on FROM with that on TO. */
3875
3876 static void
3877 move_plt_plist (struct ppc_link_hash_entry *from,
3878 struct ppc_link_hash_entry *to)
3879 {
3880 if (from->elf.plt.plist != NULL)
3881 {
3882 if (to->elf.plt.plist != NULL)
3883 {
3884 struct plt_entry **entp;
3885 struct plt_entry *ent;
3886
3887 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3888 {
3889 struct plt_entry *dent;
3890
3891 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3892 if (dent->addend == ent->addend)
3893 {
3894 dent->plt.refcount += ent->plt.refcount;
3895 *entp = ent->next;
3896 break;
3897 }
3898 if (dent == NULL)
3899 entp = &ent->next;
3900 }
3901 *entp = to->elf.plt.plist;
3902 }
3903
3904 to->elf.plt.plist = from->elf.plt.plist;
3905 from->elf.plt.plist = NULL;
3906 }
3907 }
3908
3909 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3910
3911 static void
3912 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3913 struct elf_link_hash_entry *dir,
3914 struct elf_link_hash_entry *ind)
3915 {
3916 struct ppc_link_hash_entry *edir, *eind;
3917
3918 edir = (struct ppc_link_hash_entry *) dir;
3919 eind = (struct ppc_link_hash_entry *) ind;
3920
3921 /* Copy over any dynamic relocs we may have on the indirect sym. */
3922 if (eind->dyn_relocs != NULL)
3923 {
3924 if (edir->dyn_relocs != NULL)
3925 {
3926 struct ppc_dyn_relocs **pp;
3927 struct ppc_dyn_relocs *p;
3928
3929 /* Add reloc counts against the indirect sym to the direct sym
3930 list. Merge any entries against the same section. */
3931 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3932 {
3933 struct ppc_dyn_relocs *q;
3934
3935 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3936 if (q->sec == p->sec)
3937 {
3938 q->pc_count += p->pc_count;
3939 q->count += p->count;
3940 *pp = p->next;
3941 break;
3942 }
3943 if (q == NULL)
3944 pp = &p->next;
3945 }
3946 *pp = edir->dyn_relocs;
3947 }
3948
3949 edir->dyn_relocs = eind->dyn_relocs;
3950 eind->dyn_relocs = NULL;
3951 }
3952
3953 edir->is_func |= eind->is_func;
3954 edir->is_func_descriptor |= eind->is_func_descriptor;
3955 edir->tls_mask |= eind->tls_mask;
3956
3957 /* If called to transfer flags for a weakdef during processing
3958 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3959 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3960 if (!(ELIMINATE_COPY_RELOCS
3961 && eind->elf.root.type != bfd_link_hash_indirect
3962 && edir->elf.dynamic_adjusted))
3963 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3964
3965 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3966 edir->elf.ref_regular |= eind->elf.ref_regular;
3967 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3968 edir->elf.needs_plt |= eind->elf.needs_plt;
3969
3970 /* If we were called to copy over info for a weak sym, that's all. */
3971 if (eind->elf.root.type != bfd_link_hash_indirect)
3972 return;
3973
3974 /* Copy over got entries that we may have already seen to the
3975 symbol which just became indirect. */
3976 if (eind->elf.got.glist != NULL)
3977 {
3978 if (edir->elf.got.glist != NULL)
3979 {
3980 struct got_entry **entp;
3981 struct got_entry *ent;
3982
3983 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3984 {
3985 struct got_entry *dent;
3986
3987 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3988 if (dent->addend == ent->addend
3989 && dent->owner == ent->owner
3990 && dent->tls_type == ent->tls_type)
3991 {
3992 dent->got.refcount += ent->got.refcount;
3993 *entp = ent->next;
3994 break;
3995 }
3996 if (dent == NULL)
3997 entp = &ent->next;
3998 }
3999 *entp = edir->elf.got.glist;
4000 }
4001
4002 edir->elf.got.glist = eind->elf.got.glist;
4003 eind->elf.got.glist = NULL;
4004 }
4005
4006 /* And plt entries. */
4007 move_plt_plist (eind, edir);
4008
4009 if (eind->elf.dynindx != -1)
4010 {
4011 if (edir->elf.dynindx != -1)
4012 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4013 edir->elf.dynstr_index);
4014 edir->elf.dynindx = eind->elf.dynindx;
4015 edir->elf.dynstr_index = eind->elf.dynstr_index;
4016 eind->elf.dynindx = -1;
4017 eind->elf.dynstr_index = 0;
4018 }
4019 }
4020
4021 /* Find the function descriptor hash entry from the given function code
4022 hash entry FH. Link the entries via their OH fields. */
4023
4024 static struct ppc_link_hash_entry *
4025 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4026 {
4027 struct ppc_link_hash_entry *fdh = fh->oh;
4028
4029 if (fdh == NULL)
4030 {
4031 const char *fd_name = fh->elf.root.root.string + 1;
4032
4033 fdh = (struct ppc_link_hash_entry *)
4034 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4035 if (fdh != NULL)
4036 {
4037 fdh->is_func_descriptor = 1;
4038 fdh->oh = fh;
4039 fh->is_func = 1;
4040 fh->oh = fdh;
4041 }
4042 }
4043
4044 return fdh;
4045 }
4046
4047 /* Make a fake function descriptor sym for the code sym FH. */
4048
4049 static struct ppc_link_hash_entry *
4050 make_fdh (struct bfd_link_info *info,
4051 struct ppc_link_hash_entry *fh)
4052 {
4053 bfd *abfd;
4054 asymbol *newsym;
4055 struct bfd_link_hash_entry *bh;
4056 struct ppc_link_hash_entry *fdh;
4057
4058 abfd = fh->elf.root.u.undef.abfd;
4059 newsym = bfd_make_empty_symbol (abfd);
4060 newsym->name = fh->elf.root.root.string + 1;
4061 newsym->section = bfd_und_section_ptr;
4062 newsym->value = 0;
4063 newsym->flags = BSF_WEAK;
4064
4065 bh = NULL;
4066 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4067 newsym->flags, newsym->section,
4068 newsym->value, NULL, FALSE, FALSE,
4069 &bh))
4070 return NULL;
4071
4072 fdh = (struct ppc_link_hash_entry *) bh;
4073 fdh->elf.non_elf = 0;
4074 fdh->fake = 1;
4075 fdh->is_func_descriptor = 1;
4076 fdh->oh = fh;
4077 fh->is_func = 1;
4078 fh->oh = fdh;
4079 return fdh;
4080 }
4081
4082 /* Fix function descriptor symbols defined in .opd sections to be
4083 function type. */
4084
4085 static bfd_boolean
4086 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4087 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4088 Elf_Internal_Sym *isym,
4089 const char **name ATTRIBUTE_UNUSED,
4090 flagword *flags ATTRIBUTE_UNUSED,
4091 asection **sec,
4092 bfd_vma *value ATTRIBUTE_UNUSED)
4093 {
4094 if (*sec != NULL
4095 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4096 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4097
4098 return TRUE;
4099 }
4100
4101 /* This function makes an old ABI object reference to ".bar" cause the
4102 inclusion of a new ABI object archive that defines "bar".
4103 NAME is a symbol defined in an archive. Return a symbol in the hash
4104 table that might be satisfied by the archive symbols. */
4105
4106 static struct elf_link_hash_entry *
4107 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4108 struct bfd_link_info *info,
4109 const char *name)
4110 {
4111 struct elf_link_hash_entry *h;
4112 char *dot_name;
4113 size_t len;
4114
4115 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4116 if (h != NULL
4117 /* Don't return this sym if it is a fake function descriptor
4118 created by add_symbol_adjust. */
4119 && !(h->root.type == bfd_link_hash_undefweak
4120 && ((struct ppc_link_hash_entry *) h)->fake))
4121 return h;
4122
4123 if (name[0] == '.')
4124 return h;
4125
4126 len = strlen (name);
4127 dot_name = bfd_alloc (abfd, len + 2);
4128 if (dot_name == NULL)
4129 return (struct elf_link_hash_entry *) 0 - 1;
4130 dot_name[0] = '.';
4131 memcpy (dot_name + 1, name, len + 1);
4132 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4133 bfd_release (abfd, dot_name);
4134 return h;
4135 }
4136
4137 /* This function satisfies all old ABI object references to ".bar" if a
4138 new ABI object defines "bar". Well, at least, undefined dot symbols
4139 are made weak. This stops later archive searches from including an
4140 object if we already have a function descriptor definition. It also
4141 prevents the linker complaining about undefined symbols.
4142 We also check and correct mismatched symbol visibility here. The
4143 most restrictive visibility of the function descriptor and the
4144 function entry symbol is used. */
4145
4146 static bfd_boolean
4147 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4148 {
4149 struct ppc_link_hash_table *htab;
4150 struct ppc_link_hash_entry *fdh;
4151
4152 if (eh->elf.root.type == bfd_link_hash_indirect)
4153 return TRUE;
4154
4155 if (eh->elf.root.type == bfd_link_hash_warning)
4156 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4157
4158 if (eh->elf.root.root.string[0] != '.')
4159 abort ();
4160
4161 htab = ppc_hash_table (info);
4162 fdh = get_fdh (eh, htab);
4163 if (fdh == NULL
4164 && !info->relocatable
4165 && (eh->elf.root.type == bfd_link_hash_undefined
4166 || eh->elf.root.type == bfd_link_hash_undefweak)
4167 && eh->elf.ref_regular)
4168 {
4169 /* Make an undefweak function descriptor sym, which is enough to
4170 pull in an --as-needed shared lib, but won't cause link
4171 errors. Archives are handled elsewhere. */
4172 fdh = make_fdh (info, eh);
4173 if (fdh == NULL)
4174 return FALSE;
4175 else
4176 fdh->elf.ref_regular = 1;
4177 }
4178 else if (fdh != NULL)
4179 {
4180 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4181 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4182 if (entry_vis < descr_vis)
4183 fdh->elf.other += entry_vis - descr_vis;
4184 else if (entry_vis > descr_vis)
4185 eh->elf.other += descr_vis - entry_vis;
4186
4187 if ((fdh->elf.root.type == bfd_link_hash_defined
4188 || fdh->elf.root.type == bfd_link_hash_defweak)
4189 && eh->elf.root.type == bfd_link_hash_undefined)
4190 {
4191 eh->elf.root.type = bfd_link_hash_undefweak;
4192 eh->was_undefined = 1;
4193 htab->twiddled_syms = 1;
4194 }
4195 }
4196
4197 return TRUE;
4198 }
4199
4200 /* Process list of dot-symbols we made in link_hash_newfunc. */
4201
4202 static bfd_boolean
4203 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4204 {
4205 struct ppc_link_hash_table *htab;
4206 struct ppc_link_hash_entry **p, *eh;
4207
4208 htab = ppc_hash_table (info);
4209 if (!is_ppc64_elf_target (htab->elf.root.creator))
4210 return TRUE;
4211
4212 if (is_ppc64_elf_target (ibfd->xvec))
4213 {
4214 p = &htab->dot_syms;
4215 while ((eh = *p) != NULL)
4216 {
4217 *p = NULL;
4218 if (!add_symbol_adjust (eh, info))
4219 return FALSE;
4220 p = &eh->u.next_dot_sym;
4221 }
4222 }
4223
4224 /* Clear the list for non-ppc64 input files. */
4225 p = &htab->dot_syms;
4226 while ((eh = *p) != NULL)
4227 {
4228 *p = NULL;
4229 p = &eh->u.next_dot_sym;
4230 }
4231
4232 /* We need to fix the undefs list for any syms we have twiddled to
4233 undef_weak. */
4234 if (htab->twiddled_syms)
4235 {
4236 bfd_link_repair_undef_list (&htab->elf.root);
4237 htab->twiddled_syms = 0;
4238 }
4239 return TRUE;
4240 }
4241
4242 static bfd_boolean
4243 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4244 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4245 {
4246 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4247 char *local_got_tls_masks;
4248
4249 if (local_got_ents == NULL)
4250 {
4251 bfd_size_type size = symtab_hdr->sh_info;
4252
4253 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4254 local_got_ents = bfd_zalloc (abfd, size);
4255 if (local_got_ents == NULL)
4256 return FALSE;
4257 elf_local_got_ents (abfd) = local_got_ents;
4258 }
4259
4260 if ((tls_type & TLS_EXPLICIT) == 0)
4261 {
4262 struct got_entry *ent;
4263
4264 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4265 if (ent->addend == r_addend
4266 && ent->owner == abfd
4267 && ent->tls_type == tls_type)
4268 break;
4269 if (ent == NULL)
4270 {
4271 bfd_size_type amt = sizeof (*ent);
4272 ent = bfd_alloc (abfd, amt);
4273 if (ent == NULL)
4274 return FALSE;
4275 ent->next = local_got_ents[r_symndx];
4276 ent->addend = r_addend;
4277 ent->owner = abfd;
4278 ent->tls_type = tls_type;
4279 ent->got.refcount = 0;
4280 local_got_ents[r_symndx] = ent;
4281 }
4282 ent->got.refcount += 1;
4283 }
4284
4285 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4286 local_got_tls_masks[r_symndx] |= tls_type;
4287 return TRUE;
4288 }
4289
4290 static bfd_boolean
4291 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4292 {
4293 struct plt_entry *ent;
4294
4295 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4296 if (ent->addend == addend)
4297 break;
4298 if (ent == NULL)
4299 {
4300 bfd_size_type amt = sizeof (*ent);
4301 ent = bfd_alloc (abfd, amt);
4302 if (ent == NULL)
4303 return FALSE;
4304 ent->next = eh->elf.plt.plist;
4305 ent->addend = addend;
4306 ent->plt.refcount = 0;
4307 eh->elf.plt.plist = ent;
4308 }
4309 ent->plt.refcount += 1;
4310 eh->elf.needs_plt = 1;
4311 if (eh->elf.root.root.string[0] == '.'
4312 && eh->elf.root.root.string[1] != '\0')
4313 eh->is_func = 1;
4314 return TRUE;
4315 }
4316
4317 /* Look through the relocs for a section during the first phase, and
4318 calculate needed space in the global offset table, procedure
4319 linkage table, and dynamic reloc sections. */
4320
4321 static bfd_boolean
4322 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4323 asection *sec, const Elf_Internal_Rela *relocs)
4324 {
4325 struct ppc_link_hash_table *htab;
4326 Elf_Internal_Shdr *symtab_hdr;
4327 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4328 const Elf_Internal_Rela *rel;
4329 const Elf_Internal_Rela *rel_end;
4330 asection *sreloc;
4331 asection **opd_sym_map;
4332
4333 if (info->relocatable)
4334 return TRUE;
4335
4336 /* Don't do anything special with non-loaded, non-alloced sections.
4337 In particular, any relocs in such sections should not affect GOT
4338 and PLT reference counting (ie. we don't allow them to create GOT
4339 or PLT entries), there's no possibility or desire to optimize TLS
4340 relocs, and there's not much point in propagating relocs to shared
4341 libs that the dynamic linker won't relocate. */
4342 if ((sec->flags & SEC_ALLOC) == 0)
4343 return TRUE;
4344
4345 htab = ppc_hash_table (info);
4346 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4347
4348 sym_hashes = elf_sym_hashes (abfd);
4349 sym_hashes_end = (sym_hashes
4350 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4351 - symtab_hdr->sh_info);
4352
4353 sreloc = NULL;
4354 opd_sym_map = NULL;
4355 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4356 {
4357 /* Garbage collection needs some extra help with .opd sections.
4358 We don't want to necessarily keep everything referenced by
4359 relocs in .opd, as that would keep all functions. Instead,
4360 if we reference an .opd symbol (a function descriptor), we
4361 want to keep the function code symbol's section. This is
4362 easy for global symbols, but for local syms we need to keep
4363 information about the associated function section. Later, if
4364 edit_opd deletes entries, we'll use this array to adjust
4365 local syms in .opd. */
4366 union opd_info {
4367 asection *func_section;
4368 long entry_adjust;
4369 };
4370 bfd_size_type amt;
4371
4372 amt = sec->size * sizeof (union opd_info) / 8;
4373 opd_sym_map = bfd_zalloc (abfd, amt);
4374 if (opd_sym_map == NULL)
4375 return FALSE;
4376 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4377 }
4378
4379 if (htab->sfpr == NULL
4380 && !create_linkage_sections (htab->elf.dynobj, info))
4381 return FALSE;
4382
4383 rel_end = relocs + sec->reloc_count;
4384 for (rel = relocs; rel < rel_end; rel++)
4385 {
4386 unsigned long r_symndx;
4387 struct elf_link_hash_entry *h;
4388 enum elf_ppc64_reloc_type r_type;
4389 int tls_type = 0;
4390
4391 r_symndx = ELF64_R_SYM (rel->r_info);
4392 if (r_symndx < symtab_hdr->sh_info)
4393 h = NULL;
4394 else
4395 {
4396 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4397 while (h->root.type == bfd_link_hash_indirect
4398 || h->root.type == bfd_link_hash_warning)
4399 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4400 }
4401
4402 r_type = ELF64_R_TYPE (rel->r_info);
4403 switch (r_type)
4404 {
4405 case R_PPC64_GOT_TLSLD16:
4406 case R_PPC64_GOT_TLSLD16_LO:
4407 case R_PPC64_GOT_TLSLD16_HI:
4408 case R_PPC64_GOT_TLSLD16_HA:
4409 ppc64_tlsld_got (abfd)->refcount += 1;
4410 tls_type = TLS_TLS | TLS_LD;
4411 goto dogottls;
4412
4413 case R_PPC64_GOT_TLSGD16:
4414 case R_PPC64_GOT_TLSGD16_LO:
4415 case R_PPC64_GOT_TLSGD16_HI:
4416 case R_PPC64_GOT_TLSGD16_HA:
4417 tls_type = TLS_TLS | TLS_GD;
4418 goto dogottls;
4419
4420 case R_PPC64_GOT_TPREL16_DS:
4421 case R_PPC64_GOT_TPREL16_LO_DS:
4422 case R_PPC64_GOT_TPREL16_HI:
4423 case R_PPC64_GOT_TPREL16_HA:
4424 if (info->shared)
4425 info->flags |= DF_STATIC_TLS;
4426 tls_type = TLS_TLS | TLS_TPREL;
4427 goto dogottls;
4428
4429 case R_PPC64_GOT_DTPREL16_DS:
4430 case R_PPC64_GOT_DTPREL16_LO_DS:
4431 case R_PPC64_GOT_DTPREL16_HI:
4432 case R_PPC64_GOT_DTPREL16_HA:
4433 tls_type = TLS_TLS | TLS_DTPREL;
4434 dogottls:
4435 sec->has_tls_reloc = 1;
4436 /* Fall thru */
4437
4438 case R_PPC64_GOT16:
4439 case R_PPC64_GOT16_DS:
4440 case R_PPC64_GOT16_HA:
4441 case R_PPC64_GOT16_HI:
4442 case R_PPC64_GOT16_LO:
4443 case R_PPC64_GOT16_LO_DS:
4444 /* This symbol requires a global offset table entry. */
4445 sec->has_toc_reloc = 1;
4446 if (ppc64_elf_tdata (abfd)->got == NULL
4447 && !create_got_section (abfd, info))
4448 return FALSE;
4449
4450 if (h != NULL)
4451 {
4452 struct ppc_link_hash_entry *eh;
4453 struct got_entry *ent;
4454
4455 eh = (struct ppc_link_hash_entry *) h;
4456 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4457 if (ent->addend == rel->r_addend
4458 && ent->owner == abfd
4459 && ent->tls_type == tls_type)
4460 break;
4461 if (ent == NULL)
4462 {
4463 bfd_size_type amt = sizeof (*ent);
4464 ent = bfd_alloc (abfd, amt);
4465 if (ent == NULL)
4466 return FALSE;
4467 ent->next = eh->elf.got.glist;
4468 ent->addend = rel->r_addend;
4469 ent->owner = abfd;
4470 ent->tls_type = tls_type;
4471 ent->got.refcount = 0;
4472 eh->elf.got.glist = ent;
4473 }
4474 ent->got.refcount += 1;
4475 eh->tls_mask |= tls_type;
4476 }
4477 else
4478 /* This is a global offset table entry for a local symbol. */
4479 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4480 rel->r_addend, tls_type))
4481 return FALSE;
4482 break;
4483
4484 case R_PPC64_PLT16_HA:
4485 case R_PPC64_PLT16_HI:
4486 case R_PPC64_PLT16_LO:
4487 case R_PPC64_PLT32:
4488 case R_PPC64_PLT64:
4489 /* This symbol requires a procedure linkage table entry. We
4490 actually build the entry in adjust_dynamic_symbol,
4491 because this might be a case of linking PIC code without
4492 linking in any dynamic objects, in which case we don't
4493 need to generate a procedure linkage table after all. */
4494 if (h == NULL)
4495 {
4496 /* It does not make sense to have a procedure linkage
4497 table entry for a local symbol. */
4498 bfd_set_error (bfd_error_bad_value);
4499 return FALSE;
4500 }
4501 else
4502 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4503 rel->r_addend))
4504 return FALSE;
4505 break;
4506
4507 /* The following relocations don't need to propagate the
4508 relocation if linking a shared object since they are
4509 section relative. */
4510 case R_PPC64_SECTOFF:
4511 case R_PPC64_SECTOFF_LO:
4512 case R_PPC64_SECTOFF_HI:
4513 case R_PPC64_SECTOFF_HA:
4514 case R_PPC64_SECTOFF_DS:
4515 case R_PPC64_SECTOFF_LO_DS:
4516 case R_PPC64_DTPREL16:
4517 case R_PPC64_DTPREL16_LO:
4518 case R_PPC64_DTPREL16_HI:
4519 case R_PPC64_DTPREL16_HA:
4520 case R_PPC64_DTPREL16_DS:
4521 case R_PPC64_DTPREL16_LO_DS:
4522 case R_PPC64_DTPREL16_HIGHER:
4523 case R_PPC64_DTPREL16_HIGHERA:
4524 case R_PPC64_DTPREL16_HIGHEST:
4525 case R_PPC64_DTPREL16_HIGHESTA:
4526 break;
4527
4528 /* Nor do these. */
4529 case R_PPC64_TOC16:
4530 case R_PPC64_TOC16_LO:
4531 case R_PPC64_TOC16_HI:
4532 case R_PPC64_TOC16_HA:
4533 case R_PPC64_TOC16_DS:
4534 case R_PPC64_TOC16_LO_DS:
4535 sec->has_toc_reloc = 1;
4536 break;
4537
4538 /* This relocation describes the C++ object vtable hierarchy.
4539 Reconstruct it for later use during GC. */
4540 case R_PPC64_GNU_VTINHERIT:
4541 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4542 return FALSE;
4543 break;
4544
4545 /* This relocation describes which C++ vtable entries are actually
4546 used. Record for later use during GC. */
4547 case R_PPC64_GNU_VTENTRY:
4548 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4549 return FALSE;
4550 break;
4551
4552 case R_PPC64_REL14:
4553 case R_PPC64_REL14_BRTAKEN:
4554 case R_PPC64_REL14_BRNTAKEN:
4555 {
4556 asection *dest = NULL;
4557
4558 /* Heuristic: If jumping outside our section, chances are
4559 we are going to need a stub. */
4560 if (h != NULL)
4561 {
4562 /* If the sym is weak it may be overridden later, so
4563 don't assume we know where a weak sym lives. */
4564 if (h->root.type == bfd_link_hash_defined)
4565 dest = h->root.u.def.section;
4566 }
4567 else
4568 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4569 sec, r_symndx);
4570 if (dest != sec)
4571 htab->has_14bit_branch = 1;
4572 }
4573 /* Fall through. */
4574
4575 case R_PPC64_REL24:
4576 if (h != NULL)
4577 {
4578 /* We may need a .plt entry if the function this reloc
4579 refers to is in a shared lib. */
4580 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4581 rel->r_addend))
4582 return FALSE;
4583 if (h == &htab->tls_get_addr->elf
4584 || h == &htab->tls_get_addr_fd->elf)
4585 sec->has_tls_reloc = 1;
4586 else if (htab->tls_get_addr == NULL
4587 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4588 && (h->root.root.string[15] == 0
4589 || h->root.root.string[15] == '@'))
4590 {
4591 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4592 sec->has_tls_reloc = 1;
4593 }
4594 else if (htab->tls_get_addr_fd == NULL
4595 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4596 && (h->root.root.string[14] == 0
4597 || h->root.root.string[14] == '@'))
4598 {
4599 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4600 sec->has_tls_reloc = 1;
4601 }
4602 }
4603 break;
4604
4605 case R_PPC64_TPREL64:
4606 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4607 if (info->shared)
4608 info->flags |= DF_STATIC_TLS;
4609 goto dotlstoc;
4610
4611 case R_PPC64_DTPMOD64:
4612 if (rel + 1 < rel_end
4613 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4614 && rel[1].r_offset == rel->r_offset + 8)
4615 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4616 else
4617 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4618 goto dotlstoc;
4619
4620 case R_PPC64_DTPREL64:
4621 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4622 if (rel != relocs
4623 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4624 && rel[-1].r_offset == rel->r_offset - 8)
4625 /* This is the second reloc of a dtpmod, dtprel pair.
4626 Don't mark with TLS_DTPREL. */
4627 goto dodyn;
4628
4629 dotlstoc:
4630 sec->has_tls_reloc = 1;
4631 if (h != NULL)
4632 {
4633 struct ppc_link_hash_entry *eh;
4634 eh = (struct ppc_link_hash_entry *) h;
4635 eh->tls_mask |= tls_type;
4636 }
4637 else
4638 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4639 rel->r_addend, tls_type))
4640 return FALSE;
4641
4642 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4643 {
4644 /* One extra to simplify get_tls_mask. */
4645 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4646 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4647 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4648 return FALSE;
4649 }
4650 BFD_ASSERT (rel->r_offset % 8 == 0);
4651 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4652
4653 /* Mark the second slot of a GD or LD entry.
4654 -1 to indicate GD and -2 to indicate LD. */
4655 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4656 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4657 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4658 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4659 goto dodyn;
4660
4661 case R_PPC64_TPREL16:
4662 case R_PPC64_TPREL16_LO:
4663 case R_PPC64_TPREL16_HI:
4664 case R_PPC64_TPREL16_HA:
4665 case R_PPC64_TPREL16_DS:
4666 case R_PPC64_TPREL16_LO_DS:
4667 case R_PPC64_TPREL16_HIGHER:
4668 case R_PPC64_TPREL16_HIGHERA:
4669 case R_PPC64_TPREL16_HIGHEST:
4670 case R_PPC64_TPREL16_HIGHESTA:
4671 if (info->shared)
4672 {
4673 info->flags |= DF_STATIC_TLS;
4674 goto dodyn;
4675 }
4676 break;
4677
4678 case R_PPC64_ADDR64:
4679 if (opd_sym_map != NULL
4680 && rel + 1 < rel_end
4681 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4682 {
4683 if (h != NULL)
4684 {
4685 if (h->root.root.string[0] == '.'
4686 && h->root.root.string[1] != 0
4687 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4688 ;
4689 else
4690 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4691 }
4692 else
4693 {
4694 asection *s;
4695
4696 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4697 r_symndx);
4698 if (s == NULL)
4699 return FALSE;
4700 else if (s != sec)
4701 opd_sym_map[rel->r_offset / 8] = s;
4702 }
4703 }
4704 /* Fall through. */
4705
4706 case R_PPC64_REL30:
4707 case R_PPC64_REL32:
4708 case R_PPC64_REL64:
4709 case R_PPC64_ADDR14:
4710 case R_PPC64_ADDR14_BRNTAKEN:
4711 case R_PPC64_ADDR14_BRTAKEN:
4712 case R_PPC64_ADDR16:
4713 case R_PPC64_ADDR16_DS:
4714 case R_PPC64_ADDR16_HA:
4715 case R_PPC64_ADDR16_HI:
4716 case R_PPC64_ADDR16_HIGHER:
4717 case R_PPC64_ADDR16_HIGHERA:
4718 case R_PPC64_ADDR16_HIGHEST:
4719 case R_PPC64_ADDR16_HIGHESTA:
4720 case R_PPC64_ADDR16_LO:
4721 case R_PPC64_ADDR16_LO_DS:
4722 case R_PPC64_ADDR24:
4723 case R_PPC64_ADDR32:
4724 case R_PPC64_UADDR16:
4725 case R_PPC64_UADDR32:
4726 case R_PPC64_UADDR64:
4727 case R_PPC64_TOC:
4728 if (h != NULL && !info->shared)
4729 /* We may need a copy reloc. */
4730 h->non_got_ref = 1;
4731
4732 /* Don't propagate .opd relocs. */
4733 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4734 break;
4735
4736 /* If we are creating a shared library, and this is a reloc
4737 against a global symbol, or a non PC relative reloc
4738 against a local symbol, then we need to copy the reloc
4739 into the shared library. However, if we are linking with
4740 -Bsymbolic, we do not need to copy a reloc against a
4741 global symbol which is defined in an object we are
4742 including in the link (i.e., DEF_REGULAR is set). At
4743 this point we have not seen all the input files, so it is
4744 possible that DEF_REGULAR is not set now but will be set
4745 later (it is never cleared). In case of a weak definition,
4746 DEF_REGULAR may be cleared later by a strong definition in
4747 a shared library. We account for that possibility below by
4748 storing information in the dyn_relocs field of the hash
4749 table entry. A similar situation occurs when creating
4750 shared libraries and symbol visibility changes render the
4751 symbol local.
4752
4753 If on the other hand, we are creating an executable, we
4754 may need to keep relocations for symbols satisfied by a
4755 dynamic library if we manage to avoid copy relocs for the
4756 symbol. */
4757 dodyn:
4758 if ((info->shared
4759 && (MUST_BE_DYN_RELOC (r_type)
4760 || (h != NULL
4761 && (! info->symbolic
4762 || h->root.type == bfd_link_hash_defweak
4763 || !h->def_regular))))
4764 || (ELIMINATE_COPY_RELOCS
4765 && !info->shared
4766 && h != NULL
4767 && (h->root.type == bfd_link_hash_defweak
4768 || !h->def_regular)))
4769 {
4770 struct ppc_dyn_relocs *p;
4771 struct ppc_dyn_relocs **head;
4772
4773 /* We must copy these reloc types into the output file.
4774 Create a reloc section in dynobj and make room for
4775 this reloc. */
4776 if (sreloc == NULL)
4777 {
4778 const char *name;
4779 bfd *dynobj;
4780
4781 name = (bfd_elf_string_from_elf_section
4782 (abfd,
4783 elf_elfheader (abfd)->e_shstrndx,
4784 elf_section_data (sec)->rel_hdr.sh_name));
4785 if (name == NULL)
4786 return FALSE;
4787
4788 if (! CONST_STRNEQ (name, ".rela")
4789 || strcmp (bfd_get_section_name (abfd, sec),
4790 name + 5) != 0)
4791 {
4792 (*_bfd_error_handler)
4793 (_("%B: bad relocation section name `%s\'"),
4794 abfd, name);
4795 bfd_set_error (bfd_error_bad_value);
4796 }
4797
4798 dynobj = htab->elf.dynobj;
4799 sreloc = bfd_get_section_by_name (dynobj, name);
4800 if (sreloc == NULL)
4801 {
4802 flagword flags;
4803
4804 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4805 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4806 | SEC_ALLOC | SEC_LOAD);
4807 sreloc = bfd_make_section_with_flags (dynobj,
4808 name,
4809 flags);
4810 if (sreloc == NULL
4811 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4812 return FALSE;
4813 }
4814 elf_section_data (sec)->sreloc = sreloc;
4815 }
4816
4817 /* If this is a global symbol, we count the number of
4818 relocations we need for this symbol. */
4819 if (h != NULL)
4820 {
4821 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4822 }
4823 else
4824 {
4825 /* Track dynamic relocs needed for local syms too.
4826 We really need local syms available to do this
4827 easily. Oh well. */
4828
4829 asection *s;
4830 void *vpp;
4831
4832 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4833 sec, r_symndx);
4834 if (s == NULL)
4835 return FALSE;
4836
4837 vpp = &elf_section_data (s)->local_dynrel;
4838 head = (struct ppc_dyn_relocs **) vpp;
4839 }
4840
4841 p = *head;
4842 if (p == NULL || p->sec != sec)
4843 {
4844 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4845 if (p == NULL)
4846 return FALSE;
4847 p->next = *head;
4848 *head = p;
4849 p->sec = sec;
4850 p->count = 0;
4851 p->pc_count = 0;
4852 }
4853
4854 p->count += 1;
4855 if (!MUST_BE_DYN_RELOC (r_type))
4856 p->pc_count += 1;
4857 }
4858 break;
4859
4860 default:
4861 break;
4862 }
4863 }
4864
4865 return TRUE;
4866 }
4867
4868 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4869 of the code entry point, and its section. */
4870
4871 static bfd_vma
4872 opd_entry_value (asection *opd_sec,
4873 bfd_vma offset,
4874 asection **code_sec,
4875 bfd_vma *code_off)
4876 {
4877 bfd *opd_bfd = opd_sec->owner;
4878 Elf_Internal_Rela *relocs;
4879 Elf_Internal_Rela *lo, *hi, *look;
4880 bfd_vma val;
4881
4882 /* No relocs implies we are linking a --just-symbols object. */
4883 if (opd_sec->reloc_count == 0)
4884 {
4885 bfd_vma val;
4886
4887 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4888 return (bfd_vma) -1;
4889
4890 if (code_sec != NULL)
4891 {
4892 asection *sec, *likely = NULL;
4893 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4894 if (sec->vma <= val
4895 && (sec->flags & SEC_LOAD) != 0
4896 && (sec->flags & SEC_ALLOC) != 0)
4897 likely = sec;
4898 if (likely != NULL)
4899 {
4900 *code_sec = likely;
4901 if (code_off != NULL)
4902 *code_off = val - likely->vma;
4903 }
4904 }
4905 return val;
4906 }
4907
4908 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4909 if (relocs == NULL)
4910 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4911
4912 /* Go find the opd reloc at the sym address. */
4913 lo = relocs;
4914 BFD_ASSERT (lo != NULL);
4915 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4916 val = (bfd_vma) -1;
4917 while (lo < hi)
4918 {
4919 look = lo + (hi - lo) / 2;
4920 if (look->r_offset < offset)
4921 lo = look + 1;
4922 else if (look->r_offset > offset)
4923 hi = look;
4924 else
4925 {
4926 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4927 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4928 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4929 {
4930 unsigned long symndx = ELF64_R_SYM (look->r_info);
4931 asection *sec;
4932
4933 if (symndx < symtab_hdr->sh_info)
4934 {
4935 Elf_Internal_Sym *sym;
4936
4937 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4938 if (sym == NULL)
4939 {
4940 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4941 symtab_hdr->sh_info,
4942 0, NULL, NULL, NULL);
4943 if (sym == NULL)
4944 break;
4945 symtab_hdr->contents = (bfd_byte *) sym;
4946 }
4947
4948 sym += symndx;
4949 val = sym->st_value;
4950 sec = NULL;
4951 if ((sym->st_shndx != SHN_UNDEF
4952 && sym->st_shndx < SHN_LORESERVE)
4953 || sym->st_shndx > SHN_HIRESERVE)
4954 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4955 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4956 }
4957 else
4958 {
4959 struct elf_link_hash_entry **sym_hashes;
4960 struct elf_link_hash_entry *rh;
4961
4962 sym_hashes = elf_sym_hashes (opd_bfd);
4963 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4964 while (rh->root.type == bfd_link_hash_indirect
4965 || rh->root.type == bfd_link_hash_warning)
4966 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4967 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4968 || rh->root.type == bfd_link_hash_defweak);
4969 val = rh->root.u.def.value;
4970 sec = rh->root.u.def.section;
4971 }
4972 val += look->r_addend;
4973 if (code_off != NULL)
4974 *code_off = val;
4975 if (code_sec != NULL)
4976 *code_sec = sec;
4977 if (sec != NULL && sec->output_section != NULL)
4978 val += sec->output_section->vma + sec->output_offset;
4979 }
4980 break;
4981 }
4982 }
4983
4984 return val;
4985 }
4986
4987 /* Mark sections containing dynamically referenced symbols. When
4988 building shared libraries, we must assume that any visible symbol is
4989 referenced. */
4990
4991 static bfd_boolean
4992 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
4993 {
4994 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4995 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
4996
4997 if (eh->elf.root.type == bfd_link_hash_warning)
4998 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4999
5000 /* Dynamic linking info is on the func descriptor sym. */
5001 if (eh->oh != NULL
5002 && eh->oh->is_func_descriptor
5003 && (eh->oh->elf.root.type == bfd_link_hash_defined
5004 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5005 eh = eh->oh;
5006
5007 if ((eh->elf.root.type == bfd_link_hash_defined
5008 || eh->elf.root.type == bfd_link_hash_defweak)
5009 && (eh->elf.ref_dynamic
5010 || (!info->executable
5011 && eh->elf.def_regular
5012 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5013 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5014 {
5015 asection *code_sec;
5016
5017 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5018
5019 /* Function descriptor syms cause the associated
5020 function code sym section to be marked. */
5021 if (eh->is_func_descriptor
5022 && (eh->oh->elf.root.type == bfd_link_hash_defined
5023 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5024 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5025 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5026 && opd_entry_value (eh->elf.root.u.def.section,
5027 eh->elf.root.u.def.value,
5028 &code_sec, NULL) != (bfd_vma) -1)
5029 code_sec->flags |= SEC_KEEP;
5030 }
5031
5032 return TRUE;
5033 }
5034
5035 /* Return the section that should be marked against GC for a given
5036 relocation. */
5037
5038 static asection *
5039 ppc64_elf_gc_mark_hook (asection *sec,
5040 struct bfd_link_info *info,
5041 Elf_Internal_Rela *rel,
5042 struct elf_link_hash_entry *h,
5043 Elf_Internal_Sym *sym)
5044 {
5045 asection *rsec;
5046
5047 /* First mark all our entry sym sections. */
5048 if (info->gc_sym_list != NULL)
5049 {
5050 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5051 struct bfd_sym_chain *sym = info->gc_sym_list;
5052
5053 info->gc_sym_list = NULL;
5054 for (; sym != NULL; sym = sym->next)
5055 {
5056 struct ppc_link_hash_entry *eh;
5057
5058 eh = (struct ppc_link_hash_entry *)
5059 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5060 if (eh == NULL)
5061 continue;
5062 if (eh->elf.root.type != bfd_link_hash_defined
5063 && eh->elf.root.type != bfd_link_hash_defweak)
5064 continue;
5065
5066 if (eh->is_func_descriptor
5067 && (eh->oh->elf.root.type == bfd_link_hash_defined
5068 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5069 rsec = eh->oh->elf.root.u.def.section;
5070 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5071 && opd_entry_value (eh->elf.root.u.def.section,
5072 eh->elf.root.u.def.value,
5073 &rsec, NULL) != (bfd_vma) -1)
5074 ;
5075 else
5076 continue;
5077
5078 if (!rsec->gc_mark)
5079 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5080
5081 rsec = eh->elf.root.u.def.section;
5082 if (!rsec->gc_mark)
5083 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5084 }
5085 }
5086
5087 /* Syms return NULL if we're marking .opd, so we avoid marking all
5088 function sections, as all functions are referenced in .opd. */
5089 rsec = NULL;
5090 if (get_opd_info (sec) != NULL)
5091 return rsec;
5092
5093 if (h != NULL)
5094 {
5095 enum elf_ppc64_reloc_type r_type;
5096 struct ppc_link_hash_entry *eh;
5097
5098 r_type = ELF64_R_TYPE (rel->r_info);
5099 switch (r_type)
5100 {
5101 case R_PPC64_GNU_VTINHERIT:
5102 case R_PPC64_GNU_VTENTRY:
5103 break;
5104
5105 default:
5106 switch (h->root.type)
5107 {
5108 case bfd_link_hash_defined:
5109 case bfd_link_hash_defweak:
5110 eh = (struct ppc_link_hash_entry *) h;
5111 if (eh->oh != NULL
5112 && eh->oh->is_func_descriptor
5113 && (eh->oh->elf.root.type == bfd_link_hash_defined
5114 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5115 eh = eh->oh;
5116
5117 /* Function descriptor syms cause the associated
5118 function code sym section to be marked. */
5119 if (eh->is_func_descriptor
5120 && (eh->oh->elf.root.type == bfd_link_hash_defined
5121 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5122 {
5123 /* They also mark their opd section. */
5124 if (!eh->elf.root.u.def.section->gc_mark)
5125 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5126 ppc64_elf_gc_mark_hook);
5127
5128 rsec = eh->oh->elf.root.u.def.section;
5129 }
5130 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5131 && opd_entry_value (eh->elf.root.u.def.section,
5132 eh->elf.root.u.def.value,
5133 &rsec, NULL) != (bfd_vma) -1)
5134 {
5135 if (!eh->elf.root.u.def.section->gc_mark)
5136 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5137 ppc64_elf_gc_mark_hook);
5138 }
5139 else
5140 rsec = h->root.u.def.section;
5141 break;
5142
5143 case bfd_link_hash_common:
5144 rsec = h->root.u.c.p->section;
5145 break;
5146
5147 default:
5148 break;
5149 }
5150 }
5151 }
5152 else
5153 {
5154 asection **opd_sym_section;
5155
5156 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5157 opd_sym_section = get_opd_info (rsec);
5158 if (opd_sym_section != NULL)
5159 {
5160 if (!rsec->gc_mark)
5161 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5162
5163 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5164 }
5165 }
5166
5167 return rsec;
5168 }
5169
5170 /* Update the .got, .plt. and dynamic reloc reference counts for the
5171 section being removed. */
5172
5173 static bfd_boolean
5174 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5175 asection *sec, const Elf_Internal_Rela *relocs)
5176 {
5177 struct ppc_link_hash_table *htab;
5178 Elf_Internal_Shdr *symtab_hdr;
5179 struct elf_link_hash_entry **sym_hashes;
5180 struct got_entry **local_got_ents;
5181 const Elf_Internal_Rela *rel, *relend;
5182
5183 if ((sec->flags & SEC_ALLOC) == 0)
5184 return TRUE;
5185
5186 elf_section_data (sec)->local_dynrel = NULL;
5187
5188 htab = ppc_hash_table (info);
5189 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5190 sym_hashes = elf_sym_hashes (abfd);
5191 local_got_ents = elf_local_got_ents (abfd);
5192
5193 relend = relocs + sec->reloc_count;
5194 for (rel = relocs; rel < relend; rel++)
5195 {
5196 unsigned long r_symndx;
5197 enum elf_ppc64_reloc_type r_type;
5198 struct elf_link_hash_entry *h = NULL;
5199 char tls_type = 0;
5200
5201 r_symndx = ELF64_R_SYM (rel->r_info);
5202 r_type = ELF64_R_TYPE (rel->r_info);
5203 if (r_symndx >= symtab_hdr->sh_info)
5204 {
5205 struct ppc_link_hash_entry *eh;
5206 struct ppc_dyn_relocs **pp;
5207 struct ppc_dyn_relocs *p;
5208
5209 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5210 while (h->root.type == bfd_link_hash_indirect
5211 || h->root.type == bfd_link_hash_warning)
5212 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5213 eh = (struct ppc_link_hash_entry *) h;
5214
5215 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5216 if (p->sec == sec)
5217 {
5218 /* Everything must go for SEC. */
5219 *pp = p->next;
5220 break;
5221 }
5222 }
5223
5224 switch (r_type)
5225 {
5226 case R_PPC64_GOT_TLSLD16:
5227 case R_PPC64_GOT_TLSLD16_LO:
5228 case R_PPC64_GOT_TLSLD16_HI:
5229 case R_PPC64_GOT_TLSLD16_HA:
5230 ppc64_tlsld_got (abfd)->refcount -= 1;
5231 tls_type = TLS_TLS | TLS_LD;
5232 goto dogot;
5233
5234 case R_PPC64_GOT_TLSGD16:
5235 case R_PPC64_GOT_TLSGD16_LO:
5236 case R_PPC64_GOT_TLSGD16_HI:
5237 case R_PPC64_GOT_TLSGD16_HA:
5238 tls_type = TLS_TLS | TLS_GD;
5239 goto dogot;
5240
5241 case R_PPC64_GOT_TPREL16_DS:
5242 case R_PPC64_GOT_TPREL16_LO_DS:
5243 case R_PPC64_GOT_TPREL16_HI:
5244 case R_PPC64_GOT_TPREL16_HA:
5245 tls_type = TLS_TLS | TLS_TPREL;
5246 goto dogot;
5247
5248 case R_PPC64_GOT_DTPREL16_DS:
5249 case R_PPC64_GOT_DTPREL16_LO_DS:
5250 case R_PPC64_GOT_DTPREL16_HI:
5251 case R_PPC64_GOT_DTPREL16_HA:
5252 tls_type = TLS_TLS | TLS_DTPREL;
5253 goto dogot;
5254
5255 case R_PPC64_GOT16:
5256 case R_PPC64_GOT16_DS:
5257 case R_PPC64_GOT16_HA:
5258 case R_PPC64_GOT16_HI:
5259 case R_PPC64_GOT16_LO:
5260 case R_PPC64_GOT16_LO_DS:
5261 dogot:
5262 {
5263 struct got_entry *ent;
5264
5265 if (h != NULL)
5266 ent = h->got.glist;
5267 else
5268 ent = local_got_ents[r_symndx];
5269
5270 for (; ent != NULL; ent = ent->next)
5271 if (ent->addend == rel->r_addend
5272 && ent->owner == abfd
5273 && ent->tls_type == tls_type)
5274 break;
5275 if (ent == NULL)
5276 abort ();
5277 if (ent->got.refcount > 0)
5278 ent->got.refcount -= 1;
5279 }
5280 break;
5281
5282 case R_PPC64_PLT16_HA:
5283 case R_PPC64_PLT16_HI:
5284 case R_PPC64_PLT16_LO:
5285 case R_PPC64_PLT32:
5286 case R_PPC64_PLT64:
5287 case R_PPC64_REL14:
5288 case R_PPC64_REL14_BRNTAKEN:
5289 case R_PPC64_REL14_BRTAKEN:
5290 case R_PPC64_REL24:
5291 if (h != NULL)
5292 {
5293 struct plt_entry *ent;
5294
5295 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5296 if (ent->addend == rel->r_addend)
5297 break;
5298 if (ent == NULL)
5299 abort ();
5300 if (ent->plt.refcount > 0)
5301 ent->plt.refcount -= 1;
5302 }
5303 break;
5304
5305 default:
5306 break;
5307 }
5308 }
5309 return TRUE;
5310 }
5311
5312 /* The maximum size of .sfpr. */
5313 #define SFPR_MAX (218*4)
5314
5315 struct sfpr_def_parms
5316 {
5317 const char name[12];
5318 unsigned char lo, hi;
5319 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5320 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5321 };
5322
5323 /* Auto-generate _save*, _rest* functions in .sfpr. */
5324
5325 static unsigned int
5326 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5327 {
5328 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5329 unsigned int i;
5330 size_t len = strlen (parm->name);
5331 bfd_boolean writing = FALSE;
5332 char sym[16];
5333
5334 memcpy (sym, parm->name, len);
5335 sym[len + 2] = 0;
5336
5337 for (i = parm->lo; i <= parm->hi; i++)
5338 {
5339 struct elf_link_hash_entry *h;
5340
5341 sym[len + 0] = i / 10 + '0';
5342 sym[len + 1] = i % 10 + '0';
5343 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5344 if (h != NULL
5345 && !h->def_regular)
5346 {
5347 h->root.type = bfd_link_hash_defined;
5348 h->root.u.def.section = htab->sfpr;
5349 h->root.u.def.value = htab->sfpr->size;
5350 h->type = STT_FUNC;
5351 h->def_regular = 1;
5352 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5353 writing = TRUE;
5354 if (htab->sfpr->contents == NULL)
5355 {
5356 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5357 if (htab->sfpr->contents == NULL)
5358 return FALSE;
5359 }
5360 }
5361 if (writing)
5362 {
5363 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5364 if (i != parm->hi)
5365 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5366 else
5367 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5368 htab->sfpr->size = p - htab->sfpr->contents;
5369 }
5370 }
5371
5372 return TRUE;
5373 }
5374
5375 static bfd_byte *
5376 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5377 {
5378 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5379 return p + 4;
5380 }
5381
5382 static bfd_byte *
5383 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5384 {
5385 p = savegpr0 (abfd, p, r);
5386 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5387 p = p + 4;
5388 bfd_put_32 (abfd, BLR, p);
5389 return p + 4;
5390 }
5391
5392 static bfd_byte *
5393 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5394 {
5395 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5396 return p + 4;
5397 }
5398
5399 static bfd_byte *
5400 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5401 {
5402 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5403 p = p + 4;
5404 p = restgpr0 (abfd, p, r);
5405 bfd_put_32 (abfd, MTLR_R0, p);
5406 p = p + 4;
5407 if (r == 29)
5408 {
5409 p = restgpr0 (abfd, p, 30);
5410 p = restgpr0 (abfd, p, 31);
5411 }
5412 bfd_put_32 (abfd, BLR, p);
5413 return p + 4;
5414 }
5415
5416 static bfd_byte *
5417 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5418 {
5419 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5420 return p + 4;
5421 }
5422
5423 static bfd_byte *
5424 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5425 {
5426 p = savegpr1 (abfd, p, r);
5427 bfd_put_32 (abfd, BLR, p);
5428 return p + 4;
5429 }
5430
5431 static bfd_byte *
5432 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5433 {
5434 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5435 return p + 4;
5436 }
5437
5438 static bfd_byte *
5439 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5440 {
5441 p = restgpr1 (abfd, p, r);
5442 bfd_put_32 (abfd, BLR, p);
5443 return p + 4;
5444 }
5445
5446 static bfd_byte *
5447 savefpr (bfd *abfd, bfd_byte *p, int r)
5448 {
5449 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5450 return p + 4;
5451 }
5452
5453 static bfd_byte *
5454 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5455 {
5456 p = savefpr (abfd, p, r);
5457 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5458 p = p + 4;
5459 bfd_put_32 (abfd, BLR, p);
5460 return p + 4;
5461 }
5462
5463 static bfd_byte *
5464 restfpr (bfd *abfd, bfd_byte *p, int r)
5465 {
5466 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5467 return p + 4;
5468 }
5469
5470 static bfd_byte *
5471 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5472 {
5473 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5474 p = p + 4;
5475 p = restfpr (abfd, p, r);
5476 bfd_put_32 (abfd, MTLR_R0, p);
5477 p = p + 4;
5478 if (r == 29)
5479 {
5480 p = restfpr (abfd, p, 30);
5481 p = restfpr (abfd, p, 31);
5482 }
5483 bfd_put_32 (abfd, BLR, p);
5484 return p + 4;
5485 }
5486
5487 static bfd_byte *
5488 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5489 {
5490 p = savefpr (abfd, p, r);
5491 bfd_put_32 (abfd, BLR, p);
5492 return p + 4;
5493 }
5494
5495 static bfd_byte *
5496 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5497 {
5498 p = restfpr (abfd, p, r);
5499 bfd_put_32 (abfd, BLR, p);
5500 return p + 4;
5501 }
5502
5503 static bfd_byte *
5504 savevr (bfd *abfd, bfd_byte *p, int r)
5505 {
5506 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5507 p = p + 4;
5508 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5509 return p + 4;
5510 }
5511
5512 static bfd_byte *
5513 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5514 {
5515 p = savevr (abfd, p, r);
5516 bfd_put_32 (abfd, BLR, p);
5517 return p + 4;
5518 }
5519
5520 static bfd_byte *
5521 restvr (bfd *abfd, bfd_byte *p, int r)
5522 {
5523 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5524 p = p + 4;
5525 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5526 return p + 4;
5527 }
5528
5529 static bfd_byte *
5530 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5531 {
5532 p = restvr (abfd, p, r);
5533 bfd_put_32 (abfd, BLR, p);
5534 return p + 4;
5535 }
5536
5537 /* Called via elf_link_hash_traverse to transfer dynamic linking
5538 information on function code symbol entries to their corresponding
5539 function descriptor symbol entries. */
5540
5541 static bfd_boolean
5542 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5543 {
5544 struct bfd_link_info *info;
5545 struct ppc_link_hash_table *htab;
5546 struct plt_entry *ent;
5547 struct ppc_link_hash_entry *fh;
5548 struct ppc_link_hash_entry *fdh;
5549 bfd_boolean force_local;
5550
5551 fh = (struct ppc_link_hash_entry *) h;
5552 if (fh->elf.root.type == bfd_link_hash_indirect)
5553 return TRUE;
5554
5555 if (fh->elf.root.type == bfd_link_hash_warning)
5556 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5557
5558 info = inf;
5559 htab = ppc_hash_table (info);
5560
5561 /* Resolve undefined references to dot-symbols as the value
5562 in the function descriptor, if we have one in a regular object.
5563 This is to satisfy cases like ".quad .foo". Calls to functions
5564 in dynamic objects are handled elsewhere. */
5565 if (fh->elf.root.type == bfd_link_hash_undefweak
5566 && fh->was_undefined
5567 && (fh->oh->elf.root.type == bfd_link_hash_defined
5568 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5569 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5570 && opd_entry_value (fh->oh->elf.root.u.def.section,
5571 fh->oh->elf.root.u.def.value,
5572 &fh->elf.root.u.def.section,
5573 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5574 {
5575 fh->elf.root.type = fh->oh->elf.root.type;
5576 fh->elf.forced_local = 1;
5577 }
5578
5579 /* If this is a function code symbol, transfer dynamic linking
5580 information to the function descriptor symbol. */
5581 if (!fh->is_func)
5582 return TRUE;
5583
5584 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5585 if (ent->plt.refcount > 0)
5586 break;
5587 if (ent == NULL
5588 || fh->elf.root.root.string[0] != '.'
5589 || fh->elf.root.root.string[1] == '\0')
5590 return TRUE;
5591
5592 /* Find the corresponding function descriptor symbol. Create it
5593 as undefined if necessary. */
5594
5595 fdh = get_fdh (fh, htab);
5596 if (fdh != NULL)
5597 while (fdh->elf.root.type == bfd_link_hash_indirect
5598 || fdh->elf.root.type == bfd_link_hash_warning)
5599 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5600
5601 if (fdh == NULL
5602 && info->shared
5603 && (fh->elf.root.type == bfd_link_hash_undefined
5604 || fh->elf.root.type == bfd_link_hash_undefweak))
5605 {
5606 fdh = make_fdh (info, fh);
5607 if (fdh == NULL)
5608 return FALSE;
5609 }
5610
5611 /* Fake function descriptors are made undefweak. If the function
5612 code symbol is strong undefined, make the fake sym the same.
5613 If the function code symbol is defined, then force the fake
5614 descriptor local; We can't support overriding of symbols in a
5615 shared library on a fake descriptor. */
5616
5617 if (fdh != NULL
5618 && fdh->fake
5619 && fdh->elf.root.type == bfd_link_hash_undefweak)
5620 {
5621 if (fh->elf.root.type == bfd_link_hash_undefined)
5622 {
5623 fdh->elf.root.type = bfd_link_hash_undefined;
5624 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5625 }
5626 else if (fh->elf.root.type == bfd_link_hash_defined
5627 || fh->elf.root.type == bfd_link_hash_defweak)
5628 {
5629 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5630 }
5631 }
5632
5633 if (fdh != NULL
5634 && !fdh->elf.forced_local
5635 && (info->shared
5636 || fdh->elf.def_dynamic
5637 || fdh->elf.ref_dynamic
5638 || (fdh->elf.root.type == bfd_link_hash_undefweak
5639 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5640 {
5641 if (fdh->elf.dynindx == -1)
5642 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5643 return FALSE;
5644 fdh->elf.ref_regular |= fh->elf.ref_regular;
5645 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5646 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5647 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5648 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5649 {
5650 move_plt_plist (fh, fdh);
5651 fdh->elf.needs_plt = 1;
5652 }
5653 fdh->is_func_descriptor = 1;
5654 fdh->oh = fh;
5655 fh->oh = fdh;
5656 }
5657
5658 /* Now that the info is on the function descriptor, clear the
5659 function code sym info. Any function code syms for which we
5660 don't have a definition in a regular file, we force local.
5661 This prevents a shared library from exporting syms that have
5662 been imported from another library. Function code syms that
5663 are really in the library we must leave global to prevent the
5664 linker dragging in a definition from a static library. */
5665 force_local = (!fh->elf.def_regular
5666 || fdh == NULL
5667 || !fdh->elf.def_regular
5668 || fdh->elf.forced_local);
5669 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5670
5671 return TRUE;
5672 }
5673
5674 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5675 this hook to a) provide some gcc support functions, and b) transfer
5676 dynamic linking information gathered so far on function code symbol
5677 entries, to their corresponding function descriptor symbol entries. */
5678
5679 static bfd_boolean
5680 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5681 struct bfd_link_info *info)
5682 {
5683 struct ppc_link_hash_table *htab;
5684 unsigned int i;
5685 const struct sfpr_def_parms funcs[] =
5686 {
5687 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5688 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5689 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5690 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5691 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5692 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5693 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5694 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5695 { "._savef", 14, 31, savefpr, savefpr1_tail },
5696 { "._restf", 14, 31, restfpr, restfpr1_tail },
5697 { "_savevr_", 20, 31, savevr, savevr_tail },
5698 { "_restvr_", 20, 31, restvr, restvr_tail }
5699 };
5700
5701 htab = ppc_hash_table (info);
5702 if (htab->sfpr == NULL)
5703 /* We don't have any relocs. */
5704 return TRUE;
5705
5706 /* Provide any missing _save* and _rest* functions. */
5707 htab->sfpr->size = 0;
5708 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5709 if (!sfpr_define (info, &funcs[i]))
5710 return FALSE;
5711
5712 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5713
5714 if (htab->sfpr->size == 0)
5715 htab->sfpr->flags |= SEC_EXCLUDE;
5716
5717 return TRUE;
5718 }
5719
5720 /* Adjust a symbol defined by a dynamic object and referenced by a
5721 regular object. The current definition is in some section of the
5722 dynamic object, but we're not including those sections. We have to
5723 change the definition to something the rest of the link can
5724 understand. */
5725
5726 static bfd_boolean
5727 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5728 struct elf_link_hash_entry *h)
5729 {
5730 struct ppc_link_hash_table *htab;
5731 asection *s;
5732 unsigned int power_of_two;
5733
5734 htab = ppc_hash_table (info);
5735
5736 /* Deal with function syms. */
5737 if (h->type == STT_FUNC
5738 || h->needs_plt)
5739 {
5740 /* Clear procedure linkage table information for any symbol that
5741 won't need a .plt entry. */
5742 struct plt_entry *ent;
5743 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5744 if (ent->plt.refcount > 0)
5745 break;
5746 if (ent == NULL
5747 || SYMBOL_CALLS_LOCAL (info, h)
5748 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5749 && h->root.type == bfd_link_hash_undefweak))
5750 {
5751 h->plt.plist = NULL;
5752 h->needs_plt = 0;
5753 }
5754 }
5755 else
5756 h->plt.plist = NULL;
5757
5758 /* If this is a weak symbol, and there is a real definition, the
5759 processor independent code will have arranged for us to see the
5760 real definition first, and we can just use the same value. */
5761 if (h->u.weakdef != NULL)
5762 {
5763 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5764 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5765 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5766 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5767 if (ELIMINATE_COPY_RELOCS)
5768 h->non_got_ref = h->u.weakdef->non_got_ref;
5769 return TRUE;
5770 }
5771
5772 /* If we are creating a shared library, we must presume that the
5773 only references to the symbol are via the global offset table.
5774 For such cases we need not do anything here; the relocations will
5775 be handled correctly by relocate_section. */
5776 if (info->shared)
5777 return TRUE;
5778
5779 /* If there are no references to this symbol that do not use the
5780 GOT, we don't need to generate a copy reloc. */
5781 if (!h->non_got_ref)
5782 return TRUE;
5783
5784 if (ELIMINATE_COPY_RELOCS)
5785 {
5786 struct ppc_link_hash_entry * eh;
5787 struct ppc_dyn_relocs *p;
5788
5789 eh = (struct ppc_link_hash_entry *) h;
5790 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5791 {
5792 s = p->sec->output_section;
5793 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5794 break;
5795 }
5796
5797 /* If we didn't find any dynamic relocs in read-only sections, then
5798 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5799 if (p == NULL)
5800 {
5801 h->non_got_ref = 0;
5802 return TRUE;
5803 }
5804 }
5805
5806 if (h->plt.plist != NULL)
5807 {
5808 /* We should never get here, but unfortunately there are versions
5809 of gcc out there that improperly (for this ABI) put initialized
5810 function pointers, vtable refs and suchlike in read-only
5811 sections. Allow them to proceed, but warn that this might
5812 break at runtime. */
5813 (*_bfd_error_handler)
5814 (_("copy reloc against `%s' requires lazy plt linking; "
5815 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5816 h->root.root.string);
5817 }
5818
5819 /* This is a reference to a symbol defined by a dynamic object which
5820 is not a function. */
5821
5822 if (h->size == 0)
5823 {
5824 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5825 h->root.root.string);
5826 return TRUE;
5827 }
5828
5829 /* We must allocate the symbol in our .dynbss section, which will
5830 become part of the .bss section of the executable. There will be
5831 an entry for this symbol in the .dynsym section. The dynamic
5832 object will contain position independent code, so all references
5833 from the dynamic object to this symbol will go through the global
5834 offset table. The dynamic linker will use the .dynsym entry to
5835 determine the address it must put in the global offset table, so
5836 both the dynamic object and the regular object will refer to the
5837 same memory location for the variable. */
5838
5839 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5840 to copy the initial value out of the dynamic object and into the
5841 runtime process image. We need to remember the offset into the
5842 .rela.bss section we are going to use. */
5843 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5844 {
5845 htab->relbss->size += sizeof (Elf64_External_Rela);
5846 h->needs_copy = 1;
5847 }
5848
5849 /* We need to figure out the alignment required for this symbol. I
5850 have no idea how ELF linkers handle this. */
5851 power_of_two = bfd_log2 (h->size);
5852 if (power_of_two > 4)
5853 power_of_two = 4;
5854
5855 /* Apply the required alignment. */
5856 s = htab->dynbss;
5857 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5858 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5859 {
5860 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5861 return FALSE;
5862 }
5863
5864 /* Define the symbol as being at this point in the section. */
5865 h->root.u.def.section = s;
5866 h->root.u.def.value = s->size;
5867
5868 /* Increment the section size to make room for the symbol. */
5869 s->size += h->size;
5870
5871 return TRUE;
5872 }
5873
5874 /* If given a function descriptor symbol, hide both the function code
5875 sym and the descriptor. */
5876 static void
5877 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5878 struct elf_link_hash_entry *h,
5879 bfd_boolean force_local)
5880 {
5881 struct ppc_link_hash_entry *eh;
5882 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5883
5884 eh = (struct ppc_link_hash_entry *) h;
5885 if (eh->is_func_descriptor)
5886 {
5887 struct ppc_link_hash_entry *fh = eh->oh;
5888
5889 if (fh == NULL)
5890 {
5891 const char *p, *q;
5892 struct ppc_link_hash_table *htab;
5893 char save;
5894
5895 /* We aren't supposed to use alloca in BFD because on
5896 systems which do not have alloca the version in libiberty
5897 calls xmalloc, which might cause the program to crash
5898 when it runs out of memory. This function doesn't have a
5899 return status, so there's no way to gracefully return an
5900 error. So cheat. We know that string[-1] can be safely
5901 accessed; It's either a string in an ELF string table,
5902 or allocated in an objalloc structure. */
5903
5904 p = eh->elf.root.root.string - 1;
5905 save = *p;
5906 *(char *) p = '.';
5907 htab = ppc_hash_table (info);
5908 fh = (struct ppc_link_hash_entry *)
5909 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5910 *(char *) p = save;
5911
5912 /* Unfortunately, if it so happens that the string we were
5913 looking for was allocated immediately before this string,
5914 then we overwrote the string terminator. That's the only
5915 reason the lookup should fail. */
5916 if (fh == NULL)
5917 {
5918 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5919 while (q >= eh->elf.root.root.string && *q == *p)
5920 --q, --p;
5921 if (q < eh->elf.root.root.string && *p == '.')
5922 fh = (struct ppc_link_hash_entry *)
5923 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5924 }
5925 if (fh != NULL)
5926 {
5927 eh->oh = fh;
5928 fh->oh = eh;
5929 }
5930 }
5931 if (fh != NULL)
5932 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5933 }
5934 }
5935
5936 static bfd_boolean
5937 get_sym_h (struct elf_link_hash_entry **hp,
5938 Elf_Internal_Sym **symp,
5939 asection **symsecp,
5940 char **tls_maskp,
5941 Elf_Internal_Sym **locsymsp,
5942 unsigned long r_symndx,
5943 bfd *ibfd)
5944 {
5945 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5946
5947 if (r_symndx >= symtab_hdr->sh_info)
5948 {
5949 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5950 struct elf_link_hash_entry *h;
5951
5952 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5953 while (h->root.type == bfd_link_hash_indirect
5954 || h->root.type == bfd_link_hash_warning)
5955 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5956
5957 if (hp != NULL)
5958 *hp = h;
5959
5960 if (symp != NULL)
5961 *symp = NULL;
5962
5963 if (symsecp != NULL)
5964 {
5965 asection *symsec = NULL;
5966 if (h->root.type == bfd_link_hash_defined
5967 || h->root.type == bfd_link_hash_defweak)
5968 symsec = h->root.u.def.section;
5969 *symsecp = symsec;
5970 }
5971
5972 if (tls_maskp != NULL)
5973 {
5974 struct ppc_link_hash_entry *eh;
5975
5976 eh = (struct ppc_link_hash_entry *) h;
5977 *tls_maskp = &eh->tls_mask;
5978 }
5979 }
5980 else
5981 {
5982 Elf_Internal_Sym *sym;
5983 Elf_Internal_Sym *locsyms = *locsymsp;
5984
5985 if (locsyms == NULL)
5986 {
5987 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5988 if (locsyms == NULL)
5989 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5990 symtab_hdr->sh_info,
5991 0, NULL, NULL, NULL);
5992 if (locsyms == NULL)
5993 return FALSE;
5994 *locsymsp = locsyms;
5995 }
5996 sym = locsyms + r_symndx;
5997
5998 if (hp != NULL)
5999 *hp = NULL;
6000
6001 if (symp != NULL)
6002 *symp = sym;
6003
6004 if (symsecp != NULL)
6005 {
6006 asection *symsec = NULL;
6007 if ((sym->st_shndx != SHN_UNDEF
6008 && sym->st_shndx < SHN_LORESERVE)
6009 || sym->st_shndx > SHN_HIRESERVE)
6010 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6011 *symsecp = symsec;
6012 }
6013
6014 if (tls_maskp != NULL)
6015 {
6016 struct got_entry **lgot_ents;
6017 char *tls_mask;
6018
6019 tls_mask = NULL;
6020 lgot_ents = elf_local_got_ents (ibfd);
6021 if (lgot_ents != NULL)
6022 {
6023 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6024 tls_mask = &lgot_masks[r_symndx];
6025 }
6026 *tls_maskp = tls_mask;
6027 }
6028 }
6029 return TRUE;
6030 }
6031
6032 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6033 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6034 type suitable for optimization, and 1 otherwise. */
6035
6036 static int
6037 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6038 Elf_Internal_Sym **locsymsp,
6039 const Elf_Internal_Rela *rel, bfd *ibfd)
6040 {
6041 unsigned long r_symndx;
6042 int next_r;
6043 struct elf_link_hash_entry *h;
6044 Elf_Internal_Sym *sym;
6045 asection *sec;
6046 bfd_vma off;
6047
6048 r_symndx = ELF64_R_SYM (rel->r_info);
6049 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6050 return 0;
6051
6052 if ((*tls_maskp != NULL && **tls_maskp != 0)
6053 || sec == NULL
6054 || ppc64_elf_section_data (sec)->t_symndx == NULL)
6055 return 1;
6056
6057 /* Look inside a TOC section too. */
6058 if (h != NULL)
6059 {
6060 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6061 off = h->root.u.def.value;
6062 }
6063 else
6064 off = sym->st_value;
6065 off += rel->r_addend;
6066 BFD_ASSERT (off % 8 == 0);
6067 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
6068 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
6069 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6070 return 0;
6071 if (toc_symndx != NULL)
6072 *toc_symndx = r_symndx;
6073 if ((h == NULL
6074 || ((h->root.type == bfd_link_hash_defined
6075 || h->root.type == bfd_link_hash_defweak)
6076 && !h->def_dynamic))
6077 && (next_r == -1 || next_r == -2))
6078 return 1 - next_r;
6079 return 1;
6080 }
6081
6082 /* Adjust all global syms defined in opd sections. In gcc generated
6083 code for the old ABI, these will already have been done. */
6084
6085 static bfd_boolean
6086 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6087 {
6088 struct ppc_link_hash_entry *eh;
6089 asection *sym_sec;
6090 long *opd_adjust;
6091
6092 if (h->root.type == bfd_link_hash_indirect)
6093 return TRUE;
6094
6095 if (h->root.type == bfd_link_hash_warning)
6096 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6097
6098 if (h->root.type != bfd_link_hash_defined
6099 && h->root.type != bfd_link_hash_defweak)
6100 return TRUE;
6101
6102 eh = (struct ppc_link_hash_entry *) h;
6103 if (eh->adjust_done)
6104 return TRUE;
6105
6106 sym_sec = eh->elf.root.u.def.section;
6107 opd_adjust = get_opd_info (sym_sec);
6108 if (opd_adjust != NULL)
6109 {
6110 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6111 if (adjust == -1)
6112 {
6113 /* This entry has been deleted. */
6114 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6115 if (dsec == NULL)
6116 {
6117 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6118 if (elf_discarded_section (dsec))
6119 {
6120 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6121 break;
6122 }
6123 }
6124 eh->elf.root.u.def.value = 0;
6125 eh->elf.root.u.def.section = dsec;
6126 }
6127 else
6128 eh->elf.root.u.def.value += adjust;
6129 eh->adjust_done = 1;
6130 }
6131 return TRUE;
6132 }
6133
6134 /* Handles decrementing dynamic reloc counts for the reloc specified by
6135 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6136 have already been determined. */
6137
6138 static bfd_boolean
6139 dec_dynrel_count (bfd_vma r_info,
6140 asection *sec,
6141 struct bfd_link_info *info,
6142 Elf_Internal_Sym **local_syms,
6143 struct elf_link_hash_entry *h,
6144 asection *sym_sec)
6145 {
6146 enum elf_ppc64_reloc_type r_type;
6147 struct ppc_dyn_relocs *p;
6148 struct ppc_dyn_relocs **pp;
6149
6150 /* Can this reloc be dynamic? This switch, and later tests here
6151 should be kept in sync with the code in check_relocs. */
6152 r_type = ELF64_R_TYPE (r_info);
6153 switch (r_type)
6154 {
6155 default:
6156 return TRUE;
6157
6158 case R_PPC64_TPREL16:
6159 case R_PPC64_TPREL16_LO:
6160 case R_PPC64_TPREL16_HI:
6161 case R_PPC64_TPREL16_HA:
6162 case R_PPC64_TPREL16_DS:
6163 case R_PPC64_TPREL16_LO_DS:
6164 case R_PPC64_TPREL16_HIGHER:
6165 case R_PPC64_TPREL16_HIGHERA:
6166 case R_PPC64_TPREL16_HIGHEST:
6167 case R_PPC64_TPREL16_HIGHESTA:
6168 if (!info->shared)
6169 return TRUE;
6170
6171 case R_PPC64_TPREL64:
6172 case R_PPC64_DTPMOD64:
6173 case R_PPC64_DTPREL64:
6174 case R_PPC64_ADDR64:
6175 case R_PPC64_REL30:
6176 case R_PPC64_REL32:
6177 case R_PPC64_REL64:
6178 case R_PPC64_ADDR14:
6179 case R_PPC64_ADDR14_BRNTAKEN:
6180 case R_PPC64_ADDR14_BRTAKEN:
6181 case R_PPC64_ADDR16:
6182 case R_PPC64_ADDR16_DS:
6183 case R_PPC64_ADDR16_HA:
6184 case R_PPC64_ADDR16_HI:
6185 case R_PPC64_ADDR16_HIGHER:
6186 case R_PPC64_ADDR16_HIGHERA:
6187 case R_PPC64_ADDR16_HIGHEST:
6188 case R_PPC64_ADDR16_HIGHESTA:
6189 case R_PPC64_ADDR16_LO:
6190 case R_PPC64_ADDR16_LO_DS:
6191 case R_PPC64_ADDR24:
6192 case R_PPC64_ADDR32:
6193 case R_PPC64_UADDR16:
6194 case R_PPC64_UADDR32:
6195 case R_PPC64_UADDR64:
6196 case R_PPC64_TOC:
6197 break;
6198 }
6199
6200 if (local_syms != NULL)
6201 {
6202 unsigned long r_symndx;
6203 Elf_Internal_Sym *sym;
6204 bfd *ibfd = sec->owner;
6205
6206 r_symndx = ELF64_R_SYM (r_info);
6207 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6208 return FALSE;
6209 }
6210
6211 if ((info->shared
6212 && (MUST_BE_DYN_RELOC (r_type)
6213 || (h != NULL
6214 && (!info->symbolic
6215 || h->root.type == bfd_link_hash_defweak
6216 || !h->def_regular))))
6217 || (ELIMINATE_COPY_RELOCS
6218 && !info->shared
6219 && h != NULL
6220 && (h->root.type == bfd_link_hash_defweak
6221 || !h->def_regular)))
6222 ;
6223 else
6224 return TRUE;
6225
6226 if (h != NULL)
6227 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6228 else
6229 {
6230 if (sym_sec != NULL)
6231 {
6232 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6233 pp = (struct ppc_dyn_relocs **) vpp;
6234 }
6235 else
6236 {
6237 void *vpp = &elf_section_data (sec)->local_dynrel;
6238 pp = (struct ppc_dyn_relocs **) vpp;
6239 }
6240
6241 /* elf_gc_sweep may have already removed all dyn relocs associated
6242 with local syms for a given section. Don't report a dynreloc
6243 miscount. */
6244 if (*pp == NULL)
6245 return TRUE;
6246 }
6247
6248 while ((p = *pp) != NULL)
6249 {
6250 if (p->sec == sec)
6251 {
6252 if (!MUST_BE_DYN_RELOC (r_type))
6253 p->pc_count -= 1;
6254 p->count -= 1;
6255 if (p->count == 0)
6256 *pp = p->next;
6257 return TRUE;
6258 }
6259 pp = &p->next;
6260 }
6261
6262 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6263 sec->owner, sec);
6264 bfd_set_error (bfd_error_bad_value);
6265 return FALSE;
6266 }
6267
6268 /* Remove unused Official Procedure Descriptor entries. Currently we
6269 only remove those associated with functions in discarded link-once
6270 sections, or weakly defined functions that have been overridden. It
6271 would be possible to remove many more entries for statically linked
6272 applications. */
6273
6274 bfd_boolean
6275 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6276 bfd_boolean no_opd_opt,
6277 bfd_boolean non_overlapping)
6278 {
6279 bfd *ibfd;
6280 bfd_boolean some_edited = FALSE;
6281 asection *need_pad = NULL;
6282
6283 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6284 {
6285 asection *sec;
6286 Elf_Internal_Rela *relstart, *rel, *relend;
6287 Elf_Internal_Shdr *symtab_hdr;
6288 Elf_Internal_Sym *local_syms;
6289 struct elf_link_hash_entry **sym_hashes;
6290 bfd_vma offset;
6291 bfd_size_type amt;
6292 long *opd_adjust;
6293 bfd_boolean need_edit, add_aux_fields;
6294 bfd_size_type cnt_16b = 0;
6295
6296 sec = bfd_get_section_by_name (ibfd, ".opd");
6297 if (sec == NULL || sec->size == 0)
6298 continue;
6299
6300 amt = sec->size * sizeof (long) / 8;
6301 opd_adjust = get_opd_info (sec);
6302 if (opd_adjust == NULL)
6303 {
6304 /* check_relocs hasn't been called. Must be a ld -r link
6305 or --just-symbols object. */
6306 opd_adjust = bfd_alloc (obfd, amt);
6307 if (opd_adjust == NULL)
6308 return FALSE;
6309 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6310 }
6311 memset (opd_adjust, 0, amt);
6312
6313 if (no_opd_opt)
6314 continue;
6315
6316 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6317 continue;
6318
6319 if (sec->output_section == bfd_abs_section_ptr)
6320 continue;
6321
6322 /* Look through the section relocs. */
6323 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6324 continue;
6325
6326 local_syms = NULL;
6327 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6328 sym_hashes = elf_sym_hashes (ibfd);
6329
6330 /* Read the relocations. */
6331 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6332 info->keep_memory);
6333 if (relstart == NULL)
6334 return FALSE;
6335
6336 /* First run through the relocs to check they are sane, and to
6337 determine whether we need to edit this opd section. */
6338 need_edit = FALSE;
6339 need_pad = sec;
6340 offset = 0;
6341 relend = relstart + sec->reloc_count;
6342 for (rel = relstart; rel < relend; )
6343 {
6344 enum elf_ppc64_reloc_type r_type;
6345 unsigned long r_symndx;
6346 asection *sym_sec;
6347 struct elf_link_hash_entry *h;
6348 Elf_Internal_Sym *sym;
6349
6350 /* .opd contains a regular array of 16 or 24 byte entries. We're
6351 only interested in the reloc pointing to a function entry
6352 point. */
6353 if (rel->r_offset != offset
6354 || rel + 1 >= relend
6355 || (rel + 1)->r_offset != offset + 8)
6356 {
6357 /* If someone messes with .opd alignment then after a
6358 "ld -r" we might have padding in the middle of .opd.
6359 Also, there's nothing to prevent someone putting
6360 something silly in .opd with the assembler. No .opd
6361 optimization for them! */
6362 broken_opd:
6363 (*_bfd_error_handler)
6364 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6365 need_edit = FALSE;
6366 break;
6367 }
6368
6369 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6370 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6371 {
6372 (*_bfd_error_handler)
6373 (_("%B: unexpected reloc type %u in .opd section"),
6374 ibfd, r_type);
6375 need_edit = FALSE;
6376 break;
6377 }
6378
6379 r_symndx = ELF64_R_SYM (rel->r_info);
6380 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6381 r_symndx, ibfd))
6382 goto error_ret;
6383
6384 if (sym_sec == NULL || sym_sec->owner == NULL)
6385 {
6386 const char *sym_name;
6387 if (h != NULL)
6388 sym_name = h->root.root.string;
6389 else
6390 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6391 sym_sec);
6392
6393 (*_bfd_error_handler)
6394 (_("%B: undefined sym `%s' in .opd section"),
6395 ibfd, sym_name);
6396 need_edit = FALSE;
6397 break;
6398 }
6399
6400 /* opd entries are always for functions defined in the
6401 current input bfd. If the symbol isn't defined in the
6402 input bfd, then we won't be using the function in this
6403 bfd; It must be defined in a linkonce section in another
6404 bfd, or is weak. It's also possible that we are
6405 discarding the function due to a linker script /DISCARD/,
6406 which we test for via the output_section. */
6407 if (sym_sec->owner != ibfd
6408 || sym_sec->output_section == bfd_abs_section_ptr)
6409 need_edit = TRUE;
6410
6411 rel += 2;
6412 if (rel == relend
6413 || (rel + 1 == relend && rel->r_offset == offset + 16))
6414 {
6415 if (sec->size == offset + 24)
6416 {
6417 need_pad = NULL;
6418 break;
6419 }
6420 if (rel == relend && sec->size == offset + 16)
6421 {
6422 cnt_16b++;
6423 break;
6424 }
6425 goto broken_opd;
6426 }
6427
6428 if (rel->r_offset == offset + 24)
6429 offset += 24;
6430 else if (rel->r_offset != offset + 16)
6431 goto broken_opd;
6432 else if (rel + 1 < relend
6433 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6434 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6435 {
6436 offset += 16;
6437 cnt_16b++;
6438 }
6439 else if (rel + 2 < relend
6440 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6441 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6442 {
6443 offset += 24;
6444 rel += 1;
6445 }
6446 else
6447 goto broken_opd;
6448 }
6449
6450 add_aux_fields = non_overlapping && cnt_16b > 0;
6451
6452 if (need_edit || add_aux_fields)
6453 {
6454 Elf_Internal_Rela *write_rel;
6455 bfd_byte *rptr, *wptr;
6456 bfd_byte *new_contents = NULL;
6457 bfd_boolean skip;
6458 long opd_ent_size;
6459
6460 /* This seems a waste of time as input .opd sections are all
6461 zeros as generated by gcc, but I suppose there's no reason
6462 this will always be so. We might start putting something in
6463 the third word of .opd entries. */
6464 if ((sec->flags & SEC_IN_MEMORY) == 0)
6465 {
6466 bfd_byte *loc;
6467 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6468 {
6469 if (loc != NULL)
6470 free (loc);
6471 error_ret:
6472 if (local_syms != NULL
6473 && symtab_hdr->contents != (unsigned char *) local_syms)
6474 free (local_syms);
6475 if (elf_section_data (sec)->relocs != relstart)
6476 free (relstart);
6477 return FALSE;
6478 }
6479 sec->contents = loc;
6480 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6481 }
6482
6483 elf_section_data (sec)->relocs = relstart;
6484
6485 new_contents = sec->contents;
6486 if (add_aux_fields)
6487 {
6488 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6489 if (new_contents == NULL)
6490 return FALSE;
6491 need_pad = FALSE;
6492 }
6493 wptr = new_contents;
6494 rptr = sec->contents;
6495
6496 write_rel = relstart;
6497 skip = FALSE;
6498 offset = 0;
6499 opd_ent_size = 0;
6500 for (rel = relstart; rel < relend; rel++)
6501 {
6502 unsigned long r_symndx;
6503 asection *sym_sec;
6504 struct elf_link_hash_entry *h;
6505 Elf_Internal_Sym *sym;
6506
6507 r_symndx = ELF64_R_SYM (rel->r_info);
6508 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6509 r_symndx, ibfd))
6510 goto error_ret;
6511
6512 if (rel->r_offset == offset)
6513 {
6514 struct ppc_link_hash_entry *fdh = NULL;
6515
6516 /* See if the .opd entry is full 24 byte or
6517 16 byte (with fd_aux entry overlapped with next
6518 fd_func). */
6519 opd_ent_size = 24;
6520 if ((rel + 2 == relend && sec->size == offset + 16)
6521 || (rel + 3 < relend
6522 && rel[2].r_offset == offset + 16
6523 && rel[3].r_offset == offset + 24
6524 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6525 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6526 opd_ent_size = 16;
6527
6528 if (h != NULL
6529 && h->root.root.string[0] == '.')
6530 {
6531 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6532 ppc_hash_table (info));
6533 if (fdh != NULL
6534 && fdh->elf.root.type != bfd_link_hash_defined
6535 && fdh->elf.root.type != bfd_link_hash_defweak)
6536 fdh = NULL;
6537 }
6538
6539 skip = (sym_sec->owner != ibfd
6540 || sym_sec->output_section == bfd_abs_section_ptr);
6541 if (skip)
6542 {
6543 if (fdh != NULL && sym_sec->owner == ibfd)
6544 {
6545 /* Arrange for the function descriptor sym
6546 to be dropped. */
6547 fdh->elf.root.u.def.value = 0;
6548 fdh->elf.root.u.def.section = sym_sec;
6549 }
6550 opd_adjust[rel->r_offset / 8] = -1;
6551 }
6552 else
6553 {
6554 /* We'll be keeping this opd entry. */
6555
6556 if (fdh != NULL)
6557 {
6558 /* Redefine the function descriptor symbol to
6559 this location in the opd section. It is
6560 necessary to update the value here rather
6561 than using an array of adjustments as we do
6562 for local symbols, because various places
6563 in the generic ELF code use the value
6564 stored in u.def.value. */
6565 fdh->elf.root.u.def.value = wptr - new_contents;
6566 fdh->adjust_done = 1;
6567 }
6568
6569 /* Local syms are a bit tricky. We could
6570 tweak them as they can be cached, but
6571 we'd need to look through the local syms
6572 for the function descriptor sym which we
6573 don't have at the moment. So keep an
6574 array of adjustments. */
6575 opd_adjust[rel->r_offset / 8]
6576 = (wptr - new_contents) - (rptr - sec->contents);
6577
6578 if (wptr != rptr)
6579 memcpy (wptr, rptr, opd_ent_size);
6580 wptr += opd_ent_size;
6581 if (add_aux_fields && opd_ent_size == 16)
6582 {
6583 memset (wptr, '\0', 8);
6584 wptr += 8;
6585 }
6586 }
6587 rptr += opd_ent_size;
6588 offset += opd_ent_size;
6589 }
6590
6591 if (skip)
6592 {
6593 if (!NO_OPD_RELOCS
6594 && !info->relocatable
6595 && !dec_dynrel_count (rel->r_info, sec, info,
6596 NULL, h, sym_sec))
6597 goto error_ret;
6598 }
6599 else
6600 {
6601 /* We need to adjust any reloc offsets to point to the
6602 new opd entries. While we're at it, we may as well
6603 remove redundant relocs. */
6604 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6605 if (write_rel != rel)
6606 memcpy (write_rel, rel, sizeof (*rel));
6607 ++write_rel;
6608 }
6609 }
6610
6611 sec->size = wptr - new_contents;
6612 sec->reloc_count = write_rel - relstart;
6613 if (add_aux_fields)
6614 {
6615 free (sec->contents);
6616 sec->contents = new_contents;
6617 }
6618
6619 /* Fudge the header size too, as this is used later in
6620 elf_bfd_final_link if we are emitting relocs. */
6621 elf_section_data (sec)->rel_hdr.sh_size
6622 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6623 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6624 some_edited = TRUE;
6625 }
6626 else if (elf_section_data (sec)->relocs != relstart)
6627 free (relstart);
6628
6629 if (local_syms != NULL
6630 && symtab_hdr->contents != (unsigned char *) local_syms)
6631 {
6632 if (!info->keep_memory)
6633 free (local_syms);
6634 else
6635 symtab_hdr->contents = (unsigned char *) local_syms;
6636 }
6637 }
6638
6639 if (some_edited)
6640 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6641
6642 /* If we are doing a final link and the last .opd entry is just 16 byte
6643 long, add a 8 byte padding after it. */
6644 if (need_pad != NULL && !info->relocatable)
6645 {
6646 bfd_byte *p;
6647
6648 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6649 {
6650 BFD_ASSERT (need_pad->size > 0);
6651
6652 p = bfd_malloc (need_pad->size + 8);
6653 if (p == NULL)
6654 return FALSE;
6655
6656 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6657 p, 0, need_pad->size))
6658 return FALSE;
6659
6660 need_pad->contents = p;
6661 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6662 }
6663 else
6664 {
6665 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6666 if (p == NULL)
6667 return FALSE;
6668
6669 need_pad->contents = p;
6670 }
6671
6672 memset (need_pad->contents + need_pad->size, 0, 8);
6673 need_pad->size += 8;
6674 }
6675
6676 return TRUE;
6677 }
6678
6679 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6680
6681 asection *
6682 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6683 {
6684 struct ppc_link_hash_table *htab;
6685
6686 htab = ppc_hash_table (info);
6687 if (htab->tls_get_addr != NULL)
6688 {
6689 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6690
6691 while (h->elf.root.type == bfd_link_hash_indirect
6692 || h->elf.root.type == bfd_link_hash_warning)
6693 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6694
6695 htab->tls_get_addr = h;
6696
6697 if (htab->tls_get_addr_fd == NULL
6698 && h->oh != NULL
6699 && h->oh->is_func_descriptor
6700 && (h->oh->elf.root.type == bfd_link_hash_defined
6701 || h->oh->elf.root.type == bfd_link_hash_defweak))
6702 htab->tls_get_addr_fd = h->oh;
6703 }
6704
6705 if (htab->tls_get_addr_fd != NULL)
6706 {
6707 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6708
6709 while (h->elf.root.type == bfd_link_hash_indirect
6710 || h->elf.root.type == bfd_link_hash_warning)
6711 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6712
6713 htab->tls_get_addr_fd = h;
6714 }
6715
6716 return _bfd_elf_tls_setup (obfd, info);
6717 }
6718
6719 /* Run through all the TLS relocs looking for optimization
6720 opportunities. The linker has been hacked (see ppc64elf.em) to do
6721 a preliminary section layout so that we know the TLS segment
6722 offsets. We can't optimize earlier because some optimizations need
6723 to know the tp offset, and we need to optimize before allocating
6724 dynamic relocations. */
6725
6726 bfd_boolean
6727 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6728 {
6729 bfd *ibfd;
6730 asection *sec;
6731 struct ppc_link_hash_table *htab;
6732
6733 if (info->relocatable || info->shared)
6734 return TRUE;
6735
6736 htab = ppc_hash_table (info);
6737 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6738 {
6739 Elf_Internal_Sym *locsyms = NULL;
6740 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6741 unsigned char *toc_ref = NULL;
6742
6743 /* Look at all the sections for this file, with TOC last. */
6744 for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next
6745 : ibfd->sections);
6746 sec != NULL;
6747 sec = (sec == toc ? NULL
6748 : sec->next == NULL ? toc
6749 : sec->next == toc && toc->next ? toc->next
6750 : sec->next))
6751 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6752 {
6753 Elf_Internal_Rela *relstart, *rel, *relend;
6754 int expecting_tls_get_addr;
6755 long toc_ref_index = 0;
6756
6757 /* Read the relocations. */
6758 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6759 info->keep_memory);
6760 if (relstart == NULL)
6761 return FALSE;
6762
6763 expecting_tls_get_addr = 0;
6764 relend = relstart + sec->reloc_count;
6765 for (rel = relstart; rel < relend; rel++)
6766 {
6767 enum elf_ppc64_reloc_type r_type;
6768 unsigned long r_symndx;
6769 struct elf_link_hash_entry *h;
6770 Elf_Internal_Sym *sym;
6771 asection *sym_sec;
6772 char *tls_mask;
6773 char tls_set, tls_clear, tls_type = 0;
6774 bfd_vma value;
6775 bfd_boolean ok_tprel, is_local;
6776
6777 r_symndx = ELF64_R_SYM (rel->r_info);
6778 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6779 r_symndx, ibfd))
6780 {
6781 err_free_rel:
6782 if (elf_section_data (sec)->relocs != relstart)
6783 free (relstart);
6784 if (toc_ref != NULL)
6785 free (toc_ref);
6786 if (locsyms != NULL
6787 && (elf_tdata (ibfd)->symtab_hdr.contents
6788 != (unsigned char *) locsyms))
6789 free (locsyms);
6790 return FALSE;
6791 }
6792
6793 if (h != NULL)
6794 {
6795 if (h->root.type != bfd_link_hash_defined
6796 && h->root.type != bfd_link_hash_defweak)
6797 continue;
6798 value = h->root.u.def.value;
6799 }
6800 else
6801 /* Symbols referenced by TLS relocs must be of type
6802 STT_TLS. So no need for .opd local sym adjust. */
6803 value = sym->st_value;
6804
6805 ok_tprel = FALSE;
6806 is_local = FALSE;
6807 if (h == NULL
6808 || !h->def_dynamic)
6809 {
6810 is_local = TRUE;
6811 value += sym_sec->output_offset;
6812 value += sym_sec->output_section->vma;
6813 value -= htab->elf.tls_sec->vma;
6814 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6815 < (bfd_vma) 1 << 32);
6816 }
6817
6818 r_type = ELF64_R_TYPE (rel->r_info);
6819 switch (r_type)
6820 {
6821 case R_PPC64_GOT_TLSLD16:
6822 case R_PPC64_GOT_TLSLD16_LO:
6823 case R_PPC64_GOT_TLSLD16_HI:
6824 case R_PPC64_GOT_TLSLD16_HA:
6825 /* These relocs should never be against a symbol
6826 defined in a shared lib. Leave them alone if
6827 that turns out to be the case. */
6828 ppc64_tlsld_got (ibfd)->refcount -= 1;
6829 if (!is_local)
6830 continue;
6831
6832 /* LD -> LE */
6833 tls_set = 0;
6834 tls_clear = TLS_LD;
6835 tls_type = TLS_TLS | TLS_LD;
6836 expecting_tls_get_addr = 1;
6837 break;
6838
6839 case R_PPC64_GOT_TLSGD16:
6840 case R_PPC64_GOT_TLSGD16_LO:
6841 case R_PPC64_GOT_TLSGD16_HI:
6842 case R_PPC64_GOT_TLSGD16_HA:
6843 if (ok_tprel)
6844 /* GD -> LE */
6845 tls_set = 0;
6846 else
6847 /* GD -> IE */
6848 tls_set = TLS_TLS | TLS_TPRELGD;
6849 tls_clear = TLS_GD;
6850 tls_type = TLS_TLS | TLS_GD;
6851 expecting_tls_get_addr = 1;
6852 break;
6853
6854 case R_PPC64_GOT_TPREL16_DS:
6855 case R_PPC64_GOT_TPREL16_LO_DS:
6856 case R_PPC64_GOT_TPREL16_HI:
6857 case R_PPC64_GOT_TPREL16_HA:
6858 expecting_tls_get_addr = 0;
6859 if (ok_tprel)
6860 {
6861 /* IE -> LE */
6862 tls_set = 0;
6863 tls_clear = TLS_TPREL;
6864 tls_type = TLS_TLS | TLS_TPREL;
6865 break;
6866 }
6867 else
6868 continue;
6869
6870 case R_PPC64_REL14:
6871 case R_PPC64_REL14_BRTAKEN:
6872 case R_PPC64_REL14_BRNTAKEN:
6873 case R_PPC64_REL24:
6874 if (h != NULL
6875 && (h == &htab->tls_get_addr->elf
6876 || h == &htab->tls_get_addr_fd->elf))
6877 {
6878 if (!expecting_tls_get_addr
6879 && rel != relstart
6880 && ((ELF64_R_TYPE (rel[-1].r_info)
6881 == R_PPC64_TOC16)
6882 || (ELF64_R_TYPE (rel[-1].r_info)
6883 == R_PPC64_TOC16_LO)))
6884 {
6885 /* Check for toc tls entries. */
6886 char *toc_tls;
6887 int retval;
6888
6889 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6890 rel - 1, ibfd);
6891 if (retval == 0)
6892 goto err_free_rel;
6893 if (retval > 1 && toc_tls != NULL)
6894 {
6895 expecting_tls_get_addr = 1;
6896 if (toc_ref != NULL)
6897 toc_ref[toc_ref_index] = 1;
6898 }
6899 }
6900
6901 if (expecting_tls_get_addr)
6902 {
6903 struct plt_entry *ent;
6904 for (ent = h->plt.plist; ent; ent = ent->next)
6905 if (ent->addend == 0)
6906 {
6907 if (ent->plt.refcount > 0)
6908 ent->plt.refcount -= 1;
6909 break;
6910 }
6911 }
6912 }
6913 expecting_tls_get_addr = 0;
6914 continue;
6915
6916 case R_PPC64_TOC16:
6917 case R_PPC64_TOC16_LO:
6918 case R_PPC64_TLS:
6919 expecting_tls_get_addr = 0;
6920 if (sym_sec == toc && toc != NULL)
6921 {
6922 /* Mark this toc entry as referenced by a TLS
6923 code sequence. We can do that now in the
6924 case of R_PPC64_TLS, and after checking for
6925 tls_get_addr for the TOC16 relocs. */
6926 if (toc_ref == NULL)
6927 {
6928 toc_ref = bfd_zmalloc (toc->size / 8);
6929 if (toc_ref == NULL)
6930 goto err_free_rel;
6931 }
6932 if (h != NULL)
6933 value = h->root.u.def.value;
6934 else
6935 value = sym->st_value;
6936 value += rel->r_addend;
6937 BFD_ASSERT (value < toc->size && value % 8 == 0);
6938 toc_ref_index = value / 8;
6939 if (r_type == R_PPC64_TLS)
6940 toc_ref[toc_ref_index] = 1;
6941 }
6942 continue;
6943
6944 case R_PPC64_TPREL64:
6945 expecting_tls_get_addr = 0;
6946 if (sec != toc
6947 || toc_ref == NULL
6948 || !toc_ref[rel->r_offset / 8])
6949 continue;
6950 if (ok_tprel)
6951 {
6952 /* IE -> LE */
6953 tls_set = TLS_EXPLICIT;
6954 tls_clear = TLS_TPREL;
6955 break;
6956 }
6957 else
6958 continue;
6959
6960 case R_PPC64_DTPMOD64:
6961 expecting_tls_get_addr = 0;
6962 if (sec != toc
6963 || toc_ref == NULL
6964 || !toc_ref[rel->r_offset / 8])
6965 continue;
6966 if (rel + 1 < relend
6967 && (rel[1].r_info
6968 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6969 && rel[1].r_offset == rel->r_offset + 8)
6970 {
6971 if (ok_tprel)
6972 /* GD -> LE */
6973 tls_set = TLS_EXPLICIT | TLS_GD;
6974 else
6975 /* GD -> IE */
6976 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6977 tls_clear = TLS_GD;
6978 }
6979 else
6980 {
6981 if (!is_local)
6982 continue;
6983
6984 /* LD -> LE */
6985 tls_set = TLS_EXPLICIT;
6986 tls_clear = TLS_LD;
6987 }
6988 break;
6989
6990 default:
6991 expecting_tls_get_addr = 0;
6992 continue;
6993 }
6994
6995 if ((tls_set & TLS_EXPLICIT) == 0)
6996 {
6997 struct got_entry *ent;
6998
6999 /* Adjust got entry for this reloc. */
7000 if (h != NULL)
7001 ent = h->got.glist;
7002 else
7003 ent = elf_local_got_ents (ibfd)[r_symndx];
7004
7005 for (; ent != NULL; ent = ent->next)
7006 if (ent->addend == rel->r_addend
7007 && ent->owner == ibfd
7008 && ent->tls_type == tls_type)
7009 break;
7010 if (ent == NULL)
7011 abort ();
7012
7013 if (tls_set == 0)
7014 {
7015 /* We managed to get rid of a got entry. */
7016 if (ent->got.refcount > 0)
7017 ent->got.refcount -= 1;
7018 }
7019 }
7020 else
7021 {
7022 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7023 we'll lose one or two dyn relocs. */
7024 if (!dec_dynrel_count (rel->r_info, sec, info,
7025 NULL, h, sym_sec))
7026 return FALSE;
7027
7028 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7029 {
7030 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7031 NULL, h, sym_sec))
7032 return FALSE;
7033 }
7034 }
7035
7036 *tls_mask |= tls_set;
7037 *tls_mask &= ~tls_clear;
7038 }
7039
7040 if (elf_section_data (sec)->relocs != relstart)
7041 free (relstart);
7042 }
7043
7044 if (toc_ref != NULL)
7045 free (toc_ref);
7046
7047 if (locsyms != NULL
7048 && (elf_tdata (ibfd)->symtab_hdr.contents
7049 != (unsigned char *) locsyms))
7050 {
7051 if (!info->keep_memory)
7052 free (locsyms);
7053 else
7054 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7055 }
7056 }
7057 return TRUE;
7058 }
7059
7060 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7061 the values of any global symbols in a toc section that has been
7062 edited. Globals in toc sections should be a rarity, so this function
7063 sets a flag if any are found in toc sections other than the one just
7064 edited, so that futher hash table traversals can be avoided. */
7065
7066 struct adjust_toc_info
7067 {
7068 asection *toc;
7069 unsigned long *skip;
7070 bfd_boolean global_toc_syms;
7071 };
7072
7073 static bfd_boolean
7074 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7075 {
7076 struct ppc_link_hash_entry *eh;
7077 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7078
7079 if (h->root.type == bfd_link_hash_indirect)
7080 return TRUE;
7081
7082 if (h->root.type == bfd_link_hash_warning)
7083 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7084
7085 if (h->root.type != bfd_link_hash_defined
7086 && h->root.type != bfd_link_hash_defweak)
7087 return TRUE;
7088
7089 eh = (struct ppc_link_hash_entry *) h;
7090 if (eh->adjust_done)
7091 return TRUE;
7092
7093 if (eh->elf.root.u.def.section == toc_inf->toc)
7094 {
7095 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7096 if (skip != (unsigned long) -1)
7097 eh->elf.root.u.def.value -= skip;
7098 else
7099 {
7100 (*_bfd_error_handler)
7101 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7102 eh->elf.root.u.def.section = &bfd_abs_section;
7103 eh->elf.root.u.def.value = 0;
7104 }
7105 eh->adjust_done = 1;
7106 }
7107 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7108 toc_inf->global_toc_syms = TRUE;
7109
7110 return TRUE;
7111 }
7112
7113 /* Examine all relocs referencing .toc sections in order to remove
7114 unused .toc entries. */
7115
7116 bfd_boolean
7117 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7118 {
7119 bfd *ibfd;
7120 struct adjust_toc_info toc_inf;
7121
7122 toc_inf.global_toc_syms = TRUE;
7123 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7124 {
7125 asection *toc, *sec;
7126 Elf_Internal_Shdr *symtab_hdr;
7127 Elf_Internal_Sym *local_syms;
7128 struct elf_link_hash_entry **sym_hashes;
7129 Elf_Internal_Rela *relstart, *rel;
7130 unsigned long *skip, *drop;
7131 unsigned char *used;
7132 unsigned char *keep, last, some_unused;
7133
7134 toc = bfd_get_section_by_name (ibfd, ".toc");
7135 if (toc == NULL
7136 || toc->size == 0
7137 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7138 || elf_discarded_section (toc))
7139 continue;
7140
7141 local_syms = NULL;
7142 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7143 sym_hashes = elf_sym_hashes (ibfd);
7144
7145 /* Look at sections dropped from the final link. */
7146 skip = NULL;
7147 relstart = NULL;
7148 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7149 {
7150 if (sec->reloc_count == 0
7151 || !elf_discarded_section (sec)
7152 || get_opd_info (sec)
7153 || (sec->flags & SEC_ALLOC) == 0
7154 || (sec->flags & SEC_DEBUGGING) != 0)
7155 continue;
7156
7157 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7158 if (relstart == NULL)
7159 goto error_ret;
7160
7161 /* Run through the relocs to see which toc entries might be
7162 unused. */
7163 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7164 {
7165 enum elf_ppc64_reloc_type r_type;
7166 unsigned long r_symndx;
7167 asection *sym_sec;
7168 struct elf_link_hash_entry *h;
7169 Elf_Internal_Sym *sym;
7170 bfd_vma val;
7171
7172 r_type = ELF64_R_TYPE (rel->r_info);
7173 switch (r_type)
7174 {
7175 default:
7176 continue;
7177
7178 case R_PPC64_TOC16:
7179 case R_PPC64_TOC16_LO:
7180 case R_PPC64_TOC16_HI:
7181 case R_PPC64_TOC16_HA:
7182 case R_PPC64_TOC16_DS:
7183 case R_PPC64_TOC16_LO_DS:
7184 break;
7185 }
7186
7187 r_symndx = ELF64_R_SYM (rel->r_info);
7188 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7189 r_symndx, ibfd))
7190 goto error_ret;
7191
7192 if (sym_sec != toc)
7193 continue;
7194
7195 if (h != NULL)
7196 val = h->root.u.def.value;
7197 else
7198 val = sym->st_value;
7199 val += rel->r_addend;
7200
7201 if (val >= toc->size)
7202 continue;
7203
7204 /* Anything in the toc ought to be aligned to 8 bytes.
7205 If not, don't mark as unused. */
7206 if (val & 7)
7207 continue;
7208
7209 if (skip == NULL)
7210 {
7211 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7212 if (skip == NULL)
7213 goto error_ret;
7214 }
7215
7216 skip[val >> 3] = 1;
7217 }
7218
7219 if (elf_section_data (sec)->relocs != relstart)
7220 free (relstart);
7221 }
7222
7223 if (skip == NULL)
7224 continue;
7225
7226 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7227 if (used == NULL)
7228 {
7229 error_ret:
7230 if (local_syms != NULL
7231 && symtab_hdr->contents != (unsigned char *) local_syms)
7232 free (local_syms);
7233 if (sec != NULL
7234 && relstart != NULL
7235 && elf_section_data (sec)->relocs != relstart)
7236 free (relstart);
7237 if (skip != NULL)
7238 free (skip);
7239 return FALSE;
7240 }
7241
7242 /* Now check all kept sections that might reference the toc.
7243 Check the toc itself last. */
7244 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7245 : ibfd->sections);
7246 sec != NULL;
7247 sec = (sec == toc ? NULL
7248 : sec->next == NULL ? toc
7249 : sec->next == toc && toc->next ? toc->next
7250 : sec->next))
7251 {
7252 int repeat;
7253
7254 if (sec->reloc_count == 0
7255 || elf_discarded_section (sec)
7256 || get_opd_info (sec)
7257 || (sec->flags & SEC_ALLOC) == 0
7258 || (sec->flags & SEC_DEBUGGING) != 0)
7259 continue;
7260
7261 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7262 if (relstart == NULL)
7263 goto error_ret;
7264
7265 /* Mark toc entries referenced as used. */
7266 repeat = 0;
7267 do
7268 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7269 {
7270 enum elf_ppc64_reloc_type r_type;
7271 unsigned long r_symndx;
7272 asection *sym_sec;
7273 struct elf_link_hash_entry *h;
7274 Elf_Internal_Sym *sym;
7275 bfd_vma val;
7276
7277 r_type = ELF64_R_TYPE (rel->r_info);
7278 switch (r_type)
7279 {
7280 case R_PPC64_TOC16:
7281 case R_PPC64_TOC16_LO:
7282 case R_PPC64_TOC16_HI:
7283 case R_PPC64_TOC16_HA:
7284 case R_PPC64_TOC16_DS:
7285 case R_PPC64_TOC16_LO_DS:
7286 /* In case we're taking addresses of toc entries. */
7287 case R_PPC64_ADDR64:
7288 break;
7289
7290 default:
7291 continue;
7292 }
7293
7294 r_symndx = ELF64_R_SYM (rel->r_info);
7295 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7296 r_symndx, ibfd))
7297 {
7298 free (used);
7299 goto error_ret;
7300 }
7301
7302 if (sym_sec != toc)
7303 continue;
7304
7305 if (h != NULL)
7306 val = h->root.u.def.value;
7307 else
7308 val = sym->st_value;
7309 val += rel->r_addend;
7310
7311 if (val >= toc->size)
7312 continue;
7313
7314 /* For the toc section, we only mark as used if
7315 this entry itself isn't unused. */
7316 if (sec == toc
7317 && !used[val >> 3]
7318 && (used[rel->r_offset >> 3]
7319 || !skip[rel->r_offset >> 3]))
7320 /* Do all the relocs again, to catch reference
7321 chains. */
7322 repeat = 1;
7323
7324 used[val >> 3] = 1;
7325 }
7326 while (repeat);
7327 }
7328
7329 /* Merge the used and skip arrays. Assume that TOC
7330 doublewords not appearing as either used or unused belong
7331 to to an entry more than one doubleword in size. */
7332 for (drop = skip, keep = used, last = 0, some_unused = 0;
7333 drop < skip + (toc->size + 7) / 8;
7334 ++drop, ++keep)
7335 {
7336 if (*keep)
7337 {
7338 *drop = 0;
7339 last = 0;
7340 }
7341 else if (*drop)
7342 {
7343 some_unused = 1;
7344 last = 1;
7345 }
7346 else
7347 *drop = last;
7348 }
7349
7350 free (used);
7351
7352 if (some_unused)
7353 {
7354 bfd_byte *contents, *src;
7355 unsigned long off;
7356
7357 /* Shuffle the toc contents, and at the same time convert the
7358 skip array from booleans into offsets. */
7359 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7360 goto error_ret;
7361
7362 elf_section_data (toc)->this_hdr.contents = contents;
7363
7364 for (src = contents, off = 0, drop = skip;
7365 src < contents + toc->size;
7366 src += 8, ++drop)
7367 {
7368 if (*drop)
7369 {
7370 *drop = (unsigned long) -1;
7371 off += 8;
7372 }
7373 else if (off != 0)
7374 {
7375 *drop = off;
7376 memcpy (src - off, src, 8);
7377 }
7378 }
7379 toc->rawsize = toc->size;
7380 toc->size = src - contents - off;
7381
7382 if (toc->reloc_count != 0)
7383 {
7384 Elf_Internal_Rela *wrel;
7385 bfd_size_type sz;
7386
7387 /* Read toc relocs. */
7388 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7389 TRUE);
7390 if (relstart == NULL)
7391 goto error_ret;
7392
7393 /* Remove unused toc relocs, and adjust those we keep. */
7394 wrel = relstart;
7395 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7396 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7397 {
7398 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7399 wrel->r_info = rel->r_info;
7400 wrel->r_addend = rel->r_addend;
7401 ++wrel;
7402 }
7403 else if (!dec_dynrel_count (rel->r_info, toc, info,
7404 &local_syms, NULL, NULL))
7405 goto error_ret;
7406
7407 toc->reloc_count = wrel - relstart;
7408 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7409 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7410 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7411 }
7412
7413 /* Adjust addends for relocs against the toc section sym. */
7414 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7415 {
7416 if (sec->reloc_count == 0
7417 || elf_discarded_section (sec))
7418 continue;
7419
7420 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7421 TRUE);
7422 if (relstart == NULL)
7423 goto error_ret;
7424
7425 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7426 {
7427 enum elf_ppc64_reloc_type r_type;
7428 unsigned long r_symndx;
7429 asection *sym_sec;
7430 struct elf_link_hash_entry *h;
7431 Elf_Internal_Sym *sym;
7432
7433 r_type = ELF64_R_TYPE (rel->r_info);
7434 switch (r_type)
7435 {
7436 default:
7437 continue;
7438
7439 case R_PPC64_TOC16:
7440 case R_PPC64_TOC16_LO:
7441 case R_PPC64_TOC16_HI:
7442 case R_PPC64_TOC16_HA:
7443 case R_PPC64_TOC16_DS:
7444 case R_PPC64_TOC16_LO_DS:
7445 case R_PPC64_ADDR64:
7446 break;
7447 }
7448
7449 r_symndx = ELF64_R_SYM (rel->r_info);
7450 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7451 r_symndx, ibfd))
7452 goto error_ret;
7453
7454 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7455 continue;
7456
7457 rel->r_addend -= skip[rel->r_addend >> 3];
7458 }
7459 }
7460
7461 /* We shouldn't have local or global symbols defined in the TOC,
7462 but handle them anyway. */
7463 if (local_syms != NULL)
7464 {
7465 Elf_Internal_Sym *sym;
7466
7467 for (sym = local_syms;
7468 sym < local_syms + symtab_hdr->sh_info;
7469 ++sym)
7470 if (sym->st_shndx != SHN_UNDEF
7471 && (sym->st_shndx < SHN_LORESERVE
7472 || sym->st_shndx > SHN_HIRESERVE)
7473 && sym->st_value != 0
7474 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7475 {
7476 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7477 sym->st_value -= skip[sym->st_value >> 3];
7478 else
7479 {
7480 (*_bfd_error_handler)
7481 (_("%s defined in removed toc entry"),
7482 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7483 NULL));
7484 sym->st_value = 0;
7485 sym->st_shndx = SHN_ABS;
7486 }
7487 symtab_hdr->contents = (unsigned char *) local_syms;
7488 }
7489 }
7490
7491 /* Finally, adjust any global syms defined in the toc. */
7492 if (toc_inf.global_toc_syms)
7493 {
7494 toc_inf.toc = toc;
7495 toc_inf.skip = skip;
7496 toc_inf.global_toc_syms = FALSE;
7497 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7498 &toc_inf);
7499 }
7500 }
7501
7502 if (local_syms != NULL
7503 && symtab_hdr->contents != (unsigned char *) local_syms)
7504 {
7505 if (!info->keep_memory)
7506 free (local_syms);
7507 else
7508 symtab_hdr->contents = (unsigned char *) local_syms;
7509 }
7510 free (skip);
7511 }
7512
7513 return TRUE;
7514 }
7515
7516 /* Allocate space in .plt, .got and associated reloc sections for
7517 dynamic relocs. */
7518
7519 static bfd_boolean
7520 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7521 {
7522 struct bfd_link_info *info;
7523 struct ppc_link_hash_table *htab;
7524 asection *s;
7525 struct ppc_link_hash_entry *eh;
7526 struct ppc_dyn_relocs *p;
7527 struct got_entry *gent;
7528
7529 if (h->root.type == bfd_link_hash_indirect)
7530 return TRUE;
7531
7532 if (h->root.type == bfd_link_hash_warning)
7533 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7534
7535 info = (struct bfd_link_info *) inf;
7536 htab = ppc_hash_table (info);
7537
7538 if (htab->elf.dynamic_sections_created
7539 && h->dynindx != -1
7540 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7541 {
7542 struct plt_entry *pent;
7543 bfd_boolean doneone = FALSE;
7544 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7545 if (pent->plt.refcount > 0)
7546 {
7547 /* If this is the first .plt entry, make room for the special
7548 first entry. */
7549 s = htab->plt;
7550 if (s->size == 0)
7551 s->size += PLT_INITIAL_ENTRY_SIZE;
7552
7553 pent->plt.offset = s->size;
7554
7555 /* Make room for this entry. */
7556 s->size += PLT_ENTRY_SIZE;
7557
7558 /* Make room for the .glink code. */
7559 s = htab->glink;
7560 if (s->size == 0)
7561 s->size += GLINK_CALL_STUB_SIZE;
7562 /* We need bigger stubs past index 32767. */
7563 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7564 s->size += 4;
7565 s->size += 2*4;
7566
7567 /* We also need to make an entry in the .rela.plt section. */
7568 s = htab->relplt;
7569 s->size += sizeof (Elf64_External_Rela);
7570 doneone = TRUE;
7571 }
7572 else
7573 pent->plt.offset = (bfd_vma) -1;
7574 if (!doneone)
7575 {
7576 h->plt.plist = NULL;
7577 h->needs_plt = 0;
7578 }
7579 }
7580 else
7581 {
7582 h->plt.plist = NULL;
7583 h->needs_plt = 0;
7584 }
7585
7586 eh = (struct ppc_link_hash_entry *) h;
7587 /* Run through the TLS GD got entries first if we're changing them
7588 to TPREL. */
7589 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7590 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7591 if (gent->got.refcount > 0
7592 && (gent->tls_type & TLS_GD) != 0)
7593 {
7594 /* This was a GD entry that has been converted to TPREL. If
7595 there happens to be a TPREL entry we can use that one. */
7596 struct got_entry *ent;
7597 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7598 if (ent->got.refcount > 0
7599 && (ent->tls_type & TLS_TPREL) != 0
7600 && ent->addend == gent->addend
7601 && ent->owner == gent->owner)
7602 {
7603 gent->got.refcount = 0;
7604 break;
7605 }
7606
7607 /* If not, then we'll be using our own TPREL entry. */
7608 if (gent->got.refcount != 0)
7609 gent->tls_type = TLS_TLS | TLS_TPREL;
7610 }
7611
7612 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7613 if (gent->got.refcount > 0)
7614 {
7615 bfd_boolean dyn;
7616
7617 /* Make sure this symbol is output as a dynamic symbol.
7618 Undefined weak syms won't yet be marked as dynamic,
7619 nor will all TLS symbols. */
7620 if (h->dynindx == -1
7621 && !h->forced_local)
7622 {
7623 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7624 return FALSE;
7625 }
7626
7627 if ((gent->tls_type & TLS_LD) != 0
7628 && !h->def_dynamic)
7629 {
7630 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7631 continue;
7632 }
7633
7634 s = ppc64_elf_tdata (gent->owner)->got;
7635 gent->got.offset = s->size;
7636 s->size
7637 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7638 dyn = htab->elf.dynamic_sections_created;
7639 if ((info->shared
7640 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7641 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7642 || h->root.type != bfd_link_hash_undefweak))
7643 ppc64_elf_tdata (gent->owner)->relgot->size
7644 += (gent->tls_type & eh->tls_mask & TLS_GD
7645 ? 2 * sizeof (Elf64_External_Rela)
7646 : sizeof (Elf64_External_Rela));
7647 }
7648 else
7649 gent->got.offset = (bfd_vma) -1;
7650
7651 if (eh->dyn_relocs == NULL)
7652 return TRUE;
7653
7654 /* In the shared -Bsymbolic case, discard space allocated for
7655 dynamic pc-relative relocs against symbols which turn out to be
7656 defined in regular objects. For the normal shared case, discard
7657 space for relocs that have become local due to symbol visibility
7658 changes. */
7659
7660 if (info->shared)
7661 {
7662 /* Relocs that use pc_count are those that appear on a call insn,
7663 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7664 generated via assembly. We want calls to protected symbols to
7665 resolve directly to the function rather than going via the plt.
7666 If people want function pointer comparisons to work as expected
7667 then they should avoid writing weird assembly. */
7668 if (SYMBOL_CALLS_LOCAL (info, h))
7669 {
7670 struct ppc_dyn_relocs **pp;
7671
7672 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7673 {
7674 p->count -= p->pc_count;
7675 p->pc_count = 0;
7676 if (p->count == 0)
7677 *pp = p->next;
7678 else
7679 pp = &p->next;
7680 }
7681 }
7682
7683 /* Also discard relocs on undefined weak syms with non-default
7684 visibility. */
7685 if (eh->dyn_relocs != NULL
7686 && h->root.type == bfd_link_hash_undefweak)
7687 {
7688 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7689 eh->dyn_relocs = NULL;
7690
7691 /* Make sure this symbol is output as a dynamic symbol.
7692 Undefined weak syms won't yet be marked as dynamic. */
7693 else if (h->dynindx == -1
7694 && !h->forced_local)
7695 {
7696 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7697 return FALSE;
7698 }
7699 }
7700 }
7701 else if (ELIMINATE_COPY_RELOCS)
7702 {
7703 /* For the non-shared case, discard space for relocs against
7704 symbols which turn out to need copy relocs or are not
7705 dynamic. */
7706
7707 if (!h->non_got_ref
7708 && h->def_dynamic
7709 && !h->def_regular)
7710 {
7711 /* Make sure this symbol is output as a dynamic symbol.
7712 Undefined weak syms won't yet be marked as dynamic. */
7713 if (h->dynindx == -1
7714 && !h->forced_local)
7715 {
7716 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7717 return FALSE;
7718 }
7719
7720 /* If that succeeded, we know we'll be keeping all the
7721 relocs. */
7722 if (h->dynindx != -1)
7723 goto keep;
7724 }
7725
7726 eh->dyn_relocs = NULL;
7727
7728 keep: ;
7729 }
7730
7731 /* Finally, allocate space. */
7732 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7733 {
7734 asection *sreloc = elf_section_data (p->sec)->sreloc;
7735 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7736 }
7737
7738 return TRUE;
7739 }
7740
7741 /* Find any dynamic relocs that apply to read-only sections. */
7742
7743 static bfd_boolean
7744 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7745 {
7746 struct ppc_link_hash_entry *eh;
7747 struct ppc_dyn_relocs *p;
7748
7749 if (h->root.type == bfd_link_hash_warning)
7750 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7751
7752 eh = (struct ppc_link_hash_entry *) h;
7753 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7754 {
7755 asection *s = p->sec->output_section;
7756
7757 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7758 {
7759 struct bfd_link_info *info = inf;
7760
7761 info->flags |= DF_TEXTREL;
7762
7763 /* Not an error, just cut short the traversal. */
7764 return FALSE;
7765 }
7766 }
7767 return TRUE;
7768 }
7769
7770 /* Set the sizes of the dynamic sections. */
7771
7772 static bfd_boolean
7773 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7774 struct bfd_link_info *info)
7775 {
7776 struct ppc_link_hash_table *htab;
7777 bfd *dynobj;
7778 asection *s;
7779 bfd_boolean relocs;
7780 bfd *ibfd;
7781
7782 htab = ppc_hash_table (info);
7783 dynobj = htab->elf.dynobj;
7784 if (dynobj == NULL)
7785 abort ();
7786
7787 if (htab->elf.dynamic_sections_created)
7788 {
7789 /* Set the contents of the .interp section to the interpreter. */
7790 if (info->executable)
7791 {
7792 s = bfd_get_section_by_name (dynobj, ".interp");
7793 if (s == NULL)
7794 abort ();
7795 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7796 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7797 }
7798 }
7799
7800 /* Set up .got offsets for local syms, and space for local dynamic
7801 relocs. */
7802 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7803 {
7804 struct got_entry **lgot_ents;
7805 struct got_entry **end_lgot_ents;
7806 char *lgot_masks;
7807 bfd_size_type locsymcount;
7808 Elf_Internal_Shdr *symtab_hdr;
7809 asection *srel;
7810
7811 if (!is_ppc64_elf_target (ibfd->xvec))
7812 continue;
7813
7814 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7815 {
7816 s = ppc64_elf_tdata (ibfd)->got;
7817 ppc64_tlsld_got (ibfd)->offset = s->size;
7818 s->size += 16;
7819 if (info->shared)
7820 {
7821 srel = ppc64_elf_tdata (ibfd)->relgot;
7822 srel->size += sizeof (Elf64_External_Rela);
7823 }
7824 }
7825 else
7826 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7827
7828 for (s = ibfd->sections; s != NULL; s = s->next)
7829 {
7830 struct ppc_dyn_relocs *p;
7831
7832 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7833 {
7834 if (!bfd_is_abs_section (p->sec)
7835 && bfd_is_abs_section (p->sec->output_section))
7836 {
7837 /* Input section has been discarded, either because
7838 it is a copy of a linkonce section or due to
7839 linker script /DISCARD/, so we'll be discarding
7840 the relocs too. */
7841 }
7842 else if (p->count != 0)
7843 {
7844 srel = elf_section_data (p->sec)->sreloc;
7845 srel->size += p->count * sizeof (Elf64_External_Rela);
7846 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7847 info->flags |= DF_TEXTREL;
7848 }
7849 }
7850 }
7851
7852 lgot_ents = elf_local_got_ents (ibfd);
7853 if (!lgot_ents)
7854 continue;
7855
7856 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7857 locsymcount = symtab_hdr->sh_info;
7858 end_lgot_ents = lgot_ents + locsymcount;
7859 lgot_masks = (char *) end_lgot_ents;
7860 s = ppc64_elf_tdata (ibfd)->got;
7861 srel = ppc64_elf_tdata (ibfd)->relgot;
7862 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7863 {
7864 struct got_entry *ent;
7865
7866 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7867 if (ent->got.refcount > 0)
7868 {
7869 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7870 {
7871 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7872 {
7873 ppc64_tlsld_got (ibfd)->offset = s->size;
7874 s->size += 16;
7875 if (info->shared)
7876 srel->size += sizeof (Elf64_External_Rela);
7877 }
7878 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7879 }
7880 else
7881 {
7882 ent->got.offset = s->size;
7883 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7884 {
7885 s->size += 16;
7886 if (info->shared)
7887 srel->size += 2 * sizeof (Elf64_External_Rela);
7888 }
7889 else
7890 {
7891 s->size += 8;
7892 if (info->shared)
7893 srel->size += sizeof (Elf64_External_Rela);
7894 }
7895 }
7896 }
7897 else
7898 ent->got.offset = (bfd_vma) -1;
7899 }
7900 }
7901
7902 /* Allocate global sym .plt and .got entries, and space for global
7903 sym dynamic relocs. */
7904 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7905
7906 /* We now have determined the sizes of the various dynamic sections.
7907 Allocate memory for them. */
7908 relocs = FALSE;
7909 for (s = dynobj->sections; s != NULL; s = s->next)
7910 {
7911 if ((s->flags & SEC_LINKER_CREATED) == 0)
7912 continue;
7913
7914 if (s == htab->brlt || s == htab->relbrlt)
7915 /* These haven't been allocated yet; don't strip. */
7916 continue;
7917 else if (s == htab->got
7918 || s == htab->plt
7919 || s == htab->glink
7920 || s == htab->dynbss)
7921 {
7922 /* Strip this section if we don't need it; see the
7923 comment below. */
7924 }
7925 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7926 {
7927 if (s->size != 0)
7928 {
7929 if (s != htab->relplt)
7930 relocs = TRUE;
7931
7932 /* We use the reloc_count field as a counter if we need
7933 to copy relocs into the output file. */
7934 s->reloc_count = 0;
7935 }
7936 }
7937 else
7938 {
7939 /* It's not one of our sections, so don't allocate space. */
7940 continue;
7941 }
7942
7943 if (s->size == 0)
7944 {
7945 /* If we don't need this section, strip it from the
7946 output file. This is mostly to handle .rela.bss and
7947 .rela.plt. We must create both sections in
7948 create_dynamic_sections, because they must be created
7949 before the linker maps input sections to output
7950 sections. The linker does that before
7951 adjust_dynamic_symbol is called, and it is that
7952 function which decides whether anything needs to go
7953 into these sections. */
7954 s->flags |= SEC_EXCLUDE;
7955 continue;
7956 }
7957
7958 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7959 continue;
7960
7961 /* Allocate memory for the section contents. We use bfd_zalloc
7962 here in case unused entries are not reclaimed before the
7963 section's contents are written out. This should not happen,
7964 but this way if it does we get a R_PPC64_NONE reloc in .rela
7965 sections instead of garbage.
7966 We also rely on the section contents being zero when writing
7967 the GOT. */
7968 s->contents = bfd_zalloc (dynobj, s->size);
7969 if (s->contents == NULL)
7970 return FALSE;
7971 }
7972
7973 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7974 {
7975 if (!is_ppc64_elf_target (ibfd->xvec))
7976 continue;
7977
7978 s = ppc64_elf_tdata (ibfd)->got;
7979 if (s != NULL && s != htab->got)
7980 {
7981 if (s->size == 0)
7982 s->flags |= SEC_EXCLUDE;
7983 else
7984 {
7985 s->contents = bfd_zalloc (ibfd, s->size);
7986 if (s->contents == NULL)
7987 return FALSE;
7988 }
7989 }
7990 s = ppc64_elf_tdata (ibfd)->relgot;
7991 if (s != NULL)
7992 {
7993 if (s->size == 0)
7994 s->flags |= SEC_EXCLUDE;
7995 else
7996 {
7997 s->contents = bfd_zalloc (ibfd, s->size);
7998 if (s->contents == NULL)
7999 return FALSE;
8000 relocs = TRUE;
8001 s->reloc_count = 0;
8002 }
8003 }
8004 }
8005
8006 if (htab->elf.dynamic_sections_created)
8007 {
8008 /* Add some entries to the .dynamic section. We fill in the
8009 values later, in ppc64_elf_finish_dynamic_sections, but we
8010 must add the entries now so that we get the correct size for
8011 the .dynamic section. The DT_DEBUG entry is filled in by the
8012 dynamic linker and used by the debugger. */
8013 #define add_dynamic_entry(TAG, VAL) \
8014 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8015
8016 if (info->executable)
8017 {
8018 if (!add_dynamic_entry (DT_DEBUG, 0))
8019 return FALSE;
8020 }
8021
8022 if (htab->plt != NULL && htab->plt->size != 0)
8023 {
8024 if (!add_dynamic_entry (DT_PLTGOT, 0)
8025 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8026 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8027 || !add_dynamic_entry (DT_JMPREL, 0)
8028 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8029 return FALSE;
8030 }
8031
8032 if (NO_OPD_RELOCS)
8033 {
8034 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8035 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8036 return FALSE;
8037 }
8038
8039 if (relocs)
8040 {
8041 if (!add_dynamic_entry (DT_RELA, 0)
8042 || !add_dynamic_entry (DT_RELASZ, 0)
8043 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8044 return FALSE;
8045
8046 /* If any dynamic relocs apply to a read-only section,
8047 then we need a DT_TEXTREL entry. */
8048 if ((info->flags & DF_TEXTREL) == 0)
8049 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8050
8051 if ((info->flags & DF_TEXTREL) != 0)
8052 {
8053 if (!add_dynamic_entry (DT_TEXTREL, 0))
8054 return FALSE;
8055 }
8056 }
8057 }
8058 #undef add_dynamic_entry
8059
8060 return TRUE;
8061 }
8062
8063 /* Determine the type of stub needed, if any, for a call. */
8064
8065 static inline enum ppc_stub_type
8066 ppc_type_of_stub (asection *input_sec,
8067 const Elf_Internal_Rela *rel,
8068 struct ppc_link_hash_entry **hash,
8069 bfd_vma destination)
8070 {
8071 struct ppc_link_hash_entry *h = *hash;
8072 bfd_vma location;
8073 bfd_vma branch_offset;
8074 bfd_vma max_branch_offset;
8075 enum elf_ppc64_reloc_type r_type;
8076
8077 if (h != NULL)
8078 {
8079 struct ppc_link_hash_entry *fdh = h;
8080 if (fdh->oh != NULL
8081 && fdh->oh->is_func_descriptor)
8082 fdh = fdh->oh;
8083
8084 if (fdh->elf.dynindx != -1)
8085 {
8086 struct plt_entry *ent;
8087
8088 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8089 if (ent->addend == rel->r_addend
8090 && ent->plt.offset != (bfd_vma) -1)
8091 {
8092 *hash = fdh;
8093 return ppc_stub_plt_call;
8094 }
8095 }
8096
8097 /* Here, we know we don't have a plt entry. If we don't have a
8098 either a defined function descriptor or a defined entry symbol
8099 in a regular object file, then it is pointless trying to make
8100 any other type of stub. */
8101 if (!((fdh->elf.root.type == bfd_link_hash_defined
8102 || fdh->elf.root.type == bfd_link_hash_defweak)
8103 && fdh->elf.root.u.def.section->output_section != NULL)
8104 && !((h->elf.root.type == bfd_link_hash_defined
8105 || h->elf.root.type == bfd_link_hash_defweak)
8106 && h->elf.root.u.def.section->output_section != NULL))
8107 return ppc_stub_none;
8108 }
8109
8110 /* Determine where the call point is. */
8111 location = (input_sec->output_offset
8112 + input_sec->output_section->vma
8113 + rel->r_offset);
8114
8115 branch_offset = destination - location;
8116 r_type = ELF64_R_TYPE (rel->r_info);
8117
8118 /* Determine if a long branch stub is needed. */
8119 max_branch_offset = 1 << 25;
8120 if (r_type != R_PPC64_REL24)
8121 max_branch_offset = 1 << 15;
8122
8123 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8124 /* We need a stub. Figure out whether a long_branch or plt_branch
8125 is needed later. */
8126 return ppc_stub_long_branch;
8127
8128 return ppc_stub_none;
8129 }
8130
8131 /* Build a .plt call stub. */
8132
8133 static inline bfd_byte *
8134 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8135 {
8136 #define PPC_LO(v) ((v) & 0xffff)
8137 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8138 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8139
8140 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8141 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8142 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8143 if (PPC_HA (offset + 8) != PPC_HA (offset))
8144 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8145 offset += 8;
8146 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
8147 if (PPC_HA (offset + 8) != PPC_HA (offset))
8148 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8149 offset += 8;
8150 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8151 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8152 bfd_put_32 (obfd, BCTR, p), p += 4;
8153 return p;
8154 }
8155
8156 static bfd_boolean
8157 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8158 {
8159 struct ppc_stub_hash_entry *stub_entry;
8160 struct ppc_branch_hash_entry *br_entry;
8161 struct bfd_link_info *info;
8162 struct ppc_link_hash_table *htab;
8163 bfd_byte *loc;
8164 bfd_byte *p;
8165 unsigned int indx;
8166 struct plt_entry *ent;
8167 bfd_vma dest, off;
8168 int size;
8169
8170 /* Massage our args to the form they really have. */
8171 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8172 info = in_arg;
8173
8174 htab = ppc_hash_table (info);
8175
8176 /* Make a note of the offset within the stubs for this entry. */
8177 stub_entry->stub_offset = stub_entry->stub_sec->size;
8178 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8179
8180 htab->stub_count[stub_entry->stub_type - 1] += 1;
8181 switch (stub_entry->stub_type)
8182 {
8183 case ppc_stub_long_branch:
8184 case ppc_stub_long_branch_r2off:
8185 /* Branches are relative. This is where we are going to. */
8186 off = dest = (stub_entry->target_value
8187 + stub_entry->target_section->output_offset
8188 + stub_entry->target_section->output_section->vma);
8189
8190 /* And this is where we are coming from. */
8191 off -= (stub_entry->stub_offset
8192 + stub_entry->stub_sec->output_offset
8193 + stub_entry->stub_sec->output_section->vma);
8194
8195 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8196 size = 4;
8197 else
8198 {
8199 bfd_vma r2off;
8200
8201 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8202 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8203 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8204 loc += 4;
8205 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8206 loc += 4;
8207 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8208 loc += 4;
8209 off -= 12;
8210 size = 16;
8211 }
8212 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8213
8214 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8215 {
8216 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8217 stub_entry->root.string);
8218 htab->stub_error = TRUE;
8219 return FALSE;
8220 }
8221
8222 if (info->emitrelocations)
8223 {
8224 Elf_Internal_Rela *relocs, *r;
8225 struct bfd_elf_section_data *elfsec_data;
8226
8227 elfsec_data = elf_section_data (stub_entry->stub_sec);
8228 relocs = elfsec_data->relocs;
8229 if (relocs == NULL)
8230 {
8231 bfd_size_type relsize;
8232 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8233 relocs = bfd_alloc (htab->stub_bfd, relsize);
8234 if (relocs == NULL)
8235 return FALSE;
8236 elfsec_data->relocs = relocs;
8237 elfsec_data->rel_hdr.sh_size = relsize;
8238 elfsec_data->rel_hdr.sh_entsize = 24;
8239 stub_entry->stub_sec->reloc_count = 0;
8240 }
8241 r = relocs + stub_entry->stub_sec->reloc_count;
8242 stub_entry->stub_sec->reloc_count += 1;
8243 r->r_offset = loc - stub_entry->stub_sec->contents;
8244 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8245 r->r_addend = dest;
8246 if (stub_entry->h != NULL)
8247 {
8248 struct elf_link_hash_entry **hashes;
8249 unsigned long symndx;
8250 struct ppc_link_hash_entry *h;
8251
8252 hashes = elf_sym_hashes (htab->stub_bfd);
8253 if (hashes == NULL)
8254 {
8255 bfd_size_type hsize;
8256
8257 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8258 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8259 if (hashes == NULL)
8260 return FALSE;
8261 elf_sym_hashes (htab->stub_bfd) = hashes;
8262 htab->stub_globals = 1;
8263 }
8264 symndx = htab->stub_globals++;
8265 h = stub_entry->h;
8266 hashes[symndx] = &h->elf;
8267 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8268 if (h->oh != NULL && h->oh->is_func)
8269 h = h->oh;
8270 if (h->elf.root.u.def.section != stub_entry->target_section)
8271 /* H is an opd symbol. The addend must be zero. */
8272 r->r_addend = 0;
8273 else
8274 {
8275 off = (h->elf.root.u.def.value
8276 + h->elf.root.u.def.section->output_offset
8277 + h->elf.root.u.def.section->output_section->vma);
8278 r->r_addend -= off;
8279 }
8280 }
8281 }
8282 break;
8283
8284 case ppc_stub_plt_branch:
8285 case ppc_stub_plt_branch_r2off:
8286 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8287 stub_entry->root.string + 9,
8288 FALSE, FALSE);
8289 if (br_entry == NULL)
8290 {
8291 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8292 stub_entry->root.string);
8293 htab->stub_error = TRUE;
8294 return FALSE;
8295 }
8296
8297 off = (stub_entry->target_value
8298 + stub_entry->target_section->output_offset
8299 + stub_entry->target_section->output_section->vma);
8300
8301 bfd_put_64 (htab->brlt->owner, off,
8302 htab->brlt->contents + br_entry->offset);
8303
8304 if (htab->relbrlt != NULL)
8305 {
8306 /* Create a reloc for the branch lookup table entry. */
8307 Elf_Internal_Rela rela;
8308 bfd_byte *rl;
8309
8310 rela.r_offset = (br_entry->offset
8311 + htab->brlt->output_offset
8312 + htab->brlt->output_section->vma);
8313 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8314 rela.r_addend = off;
8315
8316 rl = htab->relbrlt->contents;
8317 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8318 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8319 }
8320
8321 off = (br_entry->offset
8322 + htab->brlt->output_offset
8323 + htab->brlt->output_section->vma
8324 - elf_gp (htab->brlt->output_section->owner)
8325 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8326
8327 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8328 {
8329 (*_bfd_error_handler)
8330 (_("linkage table error against `%s'"),
8331 stub_entry->root.string);
8332 bfd_set_error (bfd_error_bad_value);
8333 htab->stub_error = TRUE;
8334 return FALSE;
8335 }
8336
8337 indx = off;
8338 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8339 {
8340 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8341 loc += 4;
8342 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8343 size = 16;
8344 }
8345 else
8346 {
8347 bfd_vma r2off;
8348
8349 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8350 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8351 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8352 loc += 4;
8353 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8354 loc += 4;
8355 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8356 loc += 4;
8357 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8358 loc += 4;
8359 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8360 size = 28;
8361 }
8362 loc += 4;
8363 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8364 loc += 4;
8365 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8366 break;
8367
8368 case ppc_stub_plt_call:
8369 /* Do the best we can for shared libraries built without
8370 exporting ".foo" for each "foo". This can happen when symbol
8371 versioning scripts strip all bar a subset of symbols. */
8372 if (stub_entry->h->oh != NULL
8373 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8374 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8375 {
8376 /* Point the symbol at the stub. There may be multiple stubs,
8377 we don't really care; The main thing is to make this sym
8378 defined somewhere. Maybe defining the symbol in the stub
8379 section is a silly idea. If we didn't do this, htab->top_id
8380 could disappear. */
8381 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8382 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8383 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8384 }
8385
8386 /* Now build the stub. */
8387 off = (bfd_vma) -1;
8388 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8389 if (ent->addend == stub_entry->addend)
8390 {
8391 off = ent->plt.offset;
8392 break;
8393 }
8394 if (off >= (bfd_vma) -2)
8395 abort ();
8396
8397 off &= ~ (bfd_vma) 1;
8398 off += (htab->plt->output_offset
8399 + htab->plt->output_section->vma
8400 - elf_gp (htab->plt->output_section->owner)
8401 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8402
8403 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8404 {
8405 (*_bfd_error_handler)
8406 (_("linkage table error against `%s'"),
8407 stub_entry->h->elf.root.root.string);
8408 bfd_set_error (bfd_error_bad_value);
8409 htab->stub_error = TRUE;
8410 return FALSE;
8411 }
8412
8413 p = build_plt_stub (htab->stub_bfd, loc, off);
8414 size = p - loc;
8415 break;
8416
8417 default:
8418 BFD_FAIL ();
8419 return FALSE;
8420 }
8421
8422 stub_entry->stub_sec->size += size;
8423
8424 if (htab->emit_stub_syms)
8425 {
8426 struct elf_link_hash_entry *h;
8427 size_t len1, len2;
8428 char *name;
8429 const char *const stub_str[] = { "long_branch",
8430 "long_branch_r2off",
8431 "plt_branch",
8432 "plt_branch_r2off",
8433 "plt_call" };
8434
8435 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8436 len2 = strlen (stub_entry->root.string);
8437 name = bfd_malloc (len1 + len2 + 2);
8438 if (name == NULL)
8439 return FALSE;
8440 memcpy (name, stub_entry->root.string, 9);
8441 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8442 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8443 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8444 if (h == NULL)
8445 return FALSE;
8446 if (h->root.type == bfd_link_hash_new)
8447 {
8448 h->root.type = bfd_link_hash_defined;
8449 h->root.u.def.section = stub_entry->stub_sec;
8450 h->root.u.def.value = stub_entry->stub_offset;
8451 h->ref_regular = 1;
8452 h->def_regular = 1;
8453 h->ref_regular_nonweak = 1;
8454 h->forced_local = 1;
8455 h->non_elf = 0;
8456 }
8457 }
8458
8459 return TRUE;
8460 }
8461
8462 /* As above, but don't actually build the stub. Just bump offset so
8463 we know stub section sizes, and select plt_branch stubs where
8464 long_branch stubs won't do. */
8465
8466 static bfd_boolean
8467 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8468 {
8469 struct ppc_stub_hash_entry *stub_entry;
8470 struct bfd_link_info *info;
8471 struct ppc_link_hash_table *htab;
8472 bfd_vma off;
8473 int size;
8474
8475 /* Massage our args to the form they really have. */
8476 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8477 info = in_arg;
8478
8479 htab = ppc_hash_table (info);
8480
8481 if (stub_entry->stub_type == ppc_stub_plt_call)
8482 {
8483 struct plt_entry *ent;
8484 off = (bfd_vma) -1;
8485 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8486 if (ent->addend == stub_entry->addend)
8487 {
8488 off = ent->plt.offset & ~(bfd_vma) 1;
8489 break;
8490 }
8491 if (off >= (bfd_vma) -2)
8492 abort ();
8493 off += (htab->plt->output_offset
8494 + htab->plt->output_section->vma
8495 - elf_gp (htab->plt->output_section->owner)
8496 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8497
8498 size = PLT_CALL_STUB_SIZE;
8499 if (PPC_HA (off + 16) != PPC_HA (off))
8500 size += 4;
8501 }
8502 else
8503 {
8504 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8505 variants. */
8506 off = (stub_entry->target_value
8507 + stub_entry->target_section->output_offset
8508 + stub_entry->target_section->output_section->vma);
8509 off -= (stub_entry->stub_sec->size
8510 + stub_entry->stub_sec->output_offset
8511 + stub_entry->stub_sec->output_section->vma);
8512
8513 /* Reset the stub type from the plt variant in case we now
8514 can reach with a shorter stub. */
8515 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8516 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8517
8518 size = 4;
8519 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8520 {
8521 off -= 12;
8522 size = 16;
8523 }
8524
8525 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8526 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8527 {
8528 struct ppc_branch_hash_entry *br_entry;
8529
8530 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8531 stub_entry->root.string + 9,
8532 TRUE, FALSE);
8533 if (br_entry == NULL)
8534 {
8535 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8536 stub_entry->root.string);
8537 htab->stub_error = TRUE;
8538 return FALSE;
8539 }
8540
8541 if (br_entry->iter != htab->stub_iteration)
8542 {
8543 br_entry->iter = htab->stub_iteration;
8544 br_entry->offset = htab->brlt->size;
8545 htab->brlt->size += 8;
8546
8547 if (htab->relbrlt != NULL)
8548 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8549 }
8550
8551 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8552 size = 16;
8553 if (stub_entry->stub_type != ppc_stub_plt_branch)
8554 size = 28;
8555 }
8556
8557 if (info->emitrelocations
8558 && (stub_entry->stub_type == ppc_stub_long_branch
8559 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8560 stub_entry->stub_sec->reloc_count += 1;
8561 }
8562
8563 stub_entry->stub_sec->size += size;
8564 return TRUE;
8565 }
8566
8567 /* Set up various things so that we can make a list of input sections
8568 for each output section included in the link. Returns -1 on error,
8569 0 when no stubs will be needed, and 1 on success. */
8570
8571 int
8572 ppc64_elf_setup_section_lists (bfd *output_bfd,
8573 struct bfd_link_info *info,
8574 int no_multi_toc)
8575 {
8576 bfd *input_bfd;
8577 int top_id, top_index, id;
8578 asection *section;
8579 asection **input_list;
8580 bfd_size_type amt;
8581 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8582
8583 htab->no_multi_toc = no_multi_toc;
8584
8585 if (htab->brlt == NULL)
8586 return 0;
8587
8588 /* Find the top input section id. */
8589 for (input_bfd = info->input_bfds, top_id = 3;
8590 input_bfd != NULL;
8591 input_bfd = input_bfd->link_next)
8592 {
8593 for (section = input_bfd->sections;
8594 section != NULL;
8595 section = section->next)
8596 {
8597 if (top_id < section->id)
8598 top_id = section->id;
8599 }
8600 }
8601
8602 htab->top_id = top_id;
8603 amt = sizeof (struct map_stub) * (top_id + 1);
8604 htab->stub_group = bfd_zmalloc (amt);
8605 if (htab->stub_group == NULL)
8606 return -1;
8607
8608 /* Set toc_off for com, und, abs and ind sections. */
8609 for (id = 0; id < 3; id++)
8610 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8611
8612 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8613
8614 /* We can't use output_bfd->section_count here to find the top output
8615 section index as some sections may have been removed, and
8616 strip_excluded_output_sections doesn't renumber the indices. */
8617 for (section = output_bfd->sections, top_index = 0;
8618 section != NULL;
8619 section = section->next)
8620 {
8621 if (top_index < section->index)
8622 top_index = section->index;
8623 }
8624
8625 htab->top_index = top_index;
8626 amt = sizeof (asection *) * (top_index + 1);
8627 input_list = bfd_zmalloc (amt);
8628 htab->input_list = input_list;
8629 if (input_list == NULL)
8630 return -1;
8631
8632 return 1;
8633 }
8634
8635 /* The linker repeatedly calls this function for each TOC input section
8636 and linker generated GOT section. Group input bfds such that the toc
8637 within a group is less than 64k in size. Will break with cute linker
8638 scripts that play games with dot in the output toc section. */
8639
8640 void
8641 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8642 {
8643 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8644
8645 if (!htab->no_multi_toc)
8646 {
8647 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8648 bfd_vma off = addr - htab->toc_curr;
8649
8650 if (off + isec->size > 0x10000)
8651 htab->toc_curr = addr;
8652
8653 elf_gp (isec->owner) = (htab->toc_curr
8654 - elf_gp (isec->output_section->owner)
8655 + TOC_BASE_OFF);
8656 }
8657 }
8658
8659 /* Called after the last call to the above function. */
8660
8661 void
8662 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8663 {
8664 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8665
8666 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8667
8668 /* toc_curr tracks the TOC offset used for code sections below in
8669 ppc64_elf_next_input_section. Start off at 0x8000. */
8670 htab->toc_curr = TOC_BASE_OFF;
8671 }
8672
8673 /* No toc references were found in ISEC. If the code in ISEC makes no
8674 calls, then there's no need to use toc adjusting stubs when branching
8675 into ISEC. Actually, indirect calls from ISEC are OK as they will
8676 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8677 needed, and 2 if a cyclical call-graph was found but no other reason
8678 for a stub was detected. If called from the top level, a return of
8679 2 means the same as a return of 0. */
8680
8681 static int
8682 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8683 {
8684 Elf_Internal_Rela *relstart, *rel;
8685 Elf_Internal_Sym *local_syms;
8686 int ret;
8687 struct ppc_link_hash_table *htab;
8688
8689 /* We know none of our code bearing sections will need toc stubs. */
8690 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8691 return 0;
8692
8693 if (isec->size == 0)
8694 return 0;
8695
8696 if (isec->output_section == NULL)
8697 return 0;
8698
8699 /* Hack for linux kernel. .fixup contains branches, but only back to
8700 the function that hit an exception. */
8701 if (strcmp (isec->name, ".fixup") == 0)
8702 return 0;
8703
8704 if (isec->reloc_count == 0)
8705 return 0;
8706
8707 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8708 info->keep_memory);
8709 if (relstart == NULL)
8710 return -1;
8711
8712 /* Look for branches to outside of this section. */
8713 local_syms = NULL;
8714 ret = 0;
8715 htab = ppc_hash_table (info);
8716 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8717 {
8718 enum elf_ppc64_reloc_type r_type;
8719 unsigned long r_symndx;
8720 struct elf_link_hash_entry *h;
8721 Elf_Internal_Sym *sym;
8722 asection *sym_sec;
8723 long *opd_adjust;
8724 bfd_vma sym_value;
8725 bfd_vma dest;
8726
8727 r_type = ELF64_R_TYPE (rel->r_info);
8728 if (r_type != R_PPC64_REL24
8729 && r_type != R_PPC64_REL14
8730 && r_type != R_PPC64_REL14_BRTAKEN
8731 && r_type != R_PPC64_REL14_BRNTAKEN)
8732 continue;
8733
8734 r_symndx = ELF64_R_SYM (rel->r_info);
8735 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8736 isec->owner))
8737 {
8738 ret = -1;
8739 break;
8740 }
8741
8742 /* Calls to dynamic lib functions go through a plt call stub
8743 that uses r2. Branches to undefined symbols might be a call
8744 using old-style dot symbols that can be satisfied by a plt
8745 call into a new-style dynamic library. */
8746 if (sym_sec == NULL)
8747 {
8748 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8749 if (eh != NULL
8750 && eh->oh != NULL
8751 && eh->oh->elf.plt.plist != NULL)
8752 {
8753 ret = 1;
8754 break;
8755 }
8756
8757 /* Ignore other undefined symbols. */
8758 continue;
8759 }
8760
8761 /* Assume branches to other sections not included in the link need
8762 stubs too, to cover -R and absolute syms. */
8763 if (sym_sec->output_section == NULL)
8764 {
8765 ret = 1;
8766 break;
8767 }
8768
8769 if (h == NULL)
8770 sym_value = sym->st_value;
8771 else
8772 {
8773 if (h->root.type != bfd_link_hash_defined
8774 && h->root.type != bfd_link_hash_defweak)
8775 abort ();
8776 sym_value = h->root.u.def.value;
8777 }
8778 sym_value += rel->r_addend;
8779
8780 /* If this branch reloc uses an opd sym, find the code section. */
8781 opd_adjust = get_opd_info (sym_sec);
8782 if (opd_adjust != NULL)
8783 {
8784 if (h == NULL)
8785 {
8786 long adjust;
8787
8788 adjust = opd_adjust[sym->st_value / 8];
8789 if (adjust == -1)
8790 /* Assume deleted functions won't ever be called. */
8791 continue;
8792 sym_value += adjust;
8793 }
8794
8795 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8796 if (dest == (bfd_vma) -1)
8797 continue;
8798 }
8799 else
8800 dest = (sym_value
8801 + sym_sec->output_offset
8802 + sym_sec->output_section->vma);
8803
8804 /* Ignore branch to self. */
8805 if (sym_sec == isec)
8806 continue;
8807
8808 /* If the called function uses the toc, we need a stub. */
8809 if (sym_sec->has_toc_reloc
8810 || sym_sec->makes_toc_func_call)
8811 {
8812 ret = 1;
8813 break;
8814 }
8815
8816 /* Assume any branch that needs a long branch stub might in fact
8817 need a plt_branch stub. A plt_branch stub uses r2. */
8818 else if (dest - (isec->output_offset
8819 + isec->output_section->vma
8820 + rel->r_offset) + (1 << 25) >= (2 << 25))
8821 {
8822 ret = 1;
8823 break;
8824 }
8825
8826 /* If calling back to a section in the process of being tested, we
8827 can't say for sure that no toc adjusting stubs are needed, so
8828 don't return zero. */
8829 else if (sym_sec->call_check_in_progress)
8830 ret = 2;
8831
8832 /* Branches to another section that itself doesn't have any TOC
8833 references are OK. Recursively call ourselves to check. */
8834 else if (sym_sec->id <= htab->top_id
8835 && htab->stub_group[sym_sec->id].toc_off == 0)
8836 {
8837 int recur;
8838
8839 /* Mark current section as indeterminate, so that other
8840 sections that call back to current won't be marked as
8841 known. */
8842 isec->call_check_in_progress = 1;
8843 recur = toc_adjusting_stub_needed (info, sym_sec);
8844 isec->call_check_in_progress = 0;
8845
8846 if (recur < 0)
8847 {
8848 /* An error. Exit. */
8849 ret = -1;
8850 break;
8851 }
8852 else if (recur <= 1)
8853 {
8854 /* Known result. Mark as checked and set section flag. */
8855 htab->stub_group[sym_sec->id].toc_off = 1;
8856 if (recur != 0)
8857 {
8858 sym_sec->makes_toc_func_call = 1;
8859 ret = 1;
8860 break;
8861 }
8862 }
8863 else
8864 {
8865 /* Unknown result. Continue checking. */
8866 ret = 2;
8867 }
8868 }
8869 }
8870
8871 if (local_syms != NULL
8872 && (elf_tdata (isec->owner)->symtab_hdr.contents
8873 != (unsigned char *) local_syms))
8874 free (local_syms);
8875 if (elf_section_data (isec)->relocs != relstart)
8876 free (relstart);
8877
8878 return ret;
8879 }
8880
8881 /* The linker repeatedly calls this function for each input section,
8882 in the order that input sections are linked into output sections.
8883 Build lists of input sections to determine groupings between which
8884 we may insert linker stubs. */
8885
8886 bfd_boolean
8887 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8888 {
8889 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8890
8891 if ((isec->output_section->flags & SEC_CODE) != 0
8892 && isec->output_section->index <= htab->top_index)
8893 {
8894 asection **list = htab->input_list + isec->output_section->index;
8895 /* Steal the link_sec pointer for our list. */
8896 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8897 /* This happens to make the list in reverse order,
8898 which is what we want. */
8899 PREV_SEC (isec) = *list;
8900 *list = isec;
8901 }
8902
8903 if (htab->multi_toc_needed)
8904 {
8905 /* If a code section has a function that uses the TOC then we need
8906 to use the right TOC (obviously). Also, make sure that .opd gets
8907 the correct TOC value for R_PPC64_TOC relocs that don't have or
8908 can't find their function symbol (shouldn't ever happen now). */
8909 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8910 {
8911 if (elf_gp (isec->owner) != 0)
8912 htab->toc_curr = elf_gp (isec->owner);
8913 }
8914 else if (htab->stub_group[isec->id].toc_off == 0)
8915 {
8916 int ret = toc_adjusting_stub_needed (info, isec);
8917 if (ret < 0)
8918 return FALSE;
8919 else
8920 isec->makes_toc_func_call = ret & 1;
8921 }
8922 }
8923
8924 /* Functions that don't use the TOC can belong in any TOC group.
8925 Use the last TOC base. This happens to make _init and _fini
8926 pasting work. */
8927 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8928 return TRUE;
8929 }
8930
8931 /* See whether we can group stub sections together. Grouping stub
8932 sections may result in fewer stubs. More importantly, we need to
8933 put all .init* and .fini* stubs at the beginning of the .init or
8934 .fini output sections respectively, because glibc splits the
8935 _init and _fini functions into multiple parts. Putting a stub in
8936 the middle of a function is not a good idea. */
8937
8938 static void
8939 group_sections (struct ppc_link_hash_table *htab,
8940 bfd_size_type stub_group_size,
8941 bfd_boolean stubs_always_before_branch)
8942 {
8943 asection **list = htab->input_list + htab->top_index;
8944 do
8945 {
8946 asection *tail = *list;
8947 while (tail != NULL)
8948 {
8949 asection *curr;
8950 asection *prev;
8951 bfd_size_type total;
8952 bfd_boolean big_sec;
8953 bfd_vma curr_toc;
8954
8955 curr = tail;
8956 total = tail->size;
8957 big_sec = total > stub_group_size;
8958 if (big_sec)
8959 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
8960 tail->owner, tail);
8961 curr_toc = htab->stub_group[tail->id].toc_off;
8962
8963 while ((prev = PREV_SEC (curr)) != NULL
8964 && ((total += curr->output_offset - prev->output_offset)
8965 < stub_group_size)
8966 && htab->stub_group[prev->id].toc_off == curr_toc)
8967 curr = prev;
8968
8969 /* OK, the size from the start of CURR to the end is less
8970 than stub_group_size and thus can be handled by one stub
8971 section. (or the tail section is itself larger than
8972 stub_group_size, in which case we may be toast.) We
8973 should really be keeping track of the total size of stubs
8974 added here, as stubs contribute to the final output
8975 section size. That's a little tricky, and this way will
8976 only break if stubs added make the total size more than
8977 2^25, ie. for the default stub_group_size, if stubs total
8978 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8979 do
8980 {
8981 prev = PREV_SEC (tail);
8982 /* Set up this stub group. */
8983 htab->stub_group[tail->id].link_sec = curr;
8984 }
8985 while (tail != curr && (tail = prev) != NULL);
8986
8987 /* But wait, there's more! Input sections up to stub_group_size
8988 bytes before the stub section can be handled by it too.
8989 Don't do this if we have a really large section after the
8990 stubs, as adding more stubs increases the chance that
8991 branches may not reach into the stub section. */
8992 if (!stubs_always_before_branch && !big_sec)
8993 {
8994 total = 0;
8995 while (prev != NULL
8996 && ((total += tail->output_offset - prev->output_offset)
8997 < stub_group_size)
8998 && htab->stub_group[prev->id].toc_off == curr_toc)
8999 {
9000 tail = prev;
9001 prev = PREV_SEC (tail);
9002 htab->stub_group[tail->id].link_sec = curr;
9003 }
9004 }
9005 tail = prev;
9006 }
9007 }
9008 while (list-- != htab->input_list);
9009 free (htab->input_list);
9010 #undef PREV_SEC
9011 }
9012
9013 /* Determine and set the size of the stub section for a final link.
9014
9015 The basic idea here is to examine all the relocations looking for
9016 PC-relative calls to a target that is unreachable with a "bl"
9017 instruction. */
9018
9019 bfd_boolean
9020 ppc64_elf_size_stubs (bfd *output_bfd,
9021 struct bfd_link_info *info,
9022 bfd_signed_vma group_size,
9023 asection *(*add_stub_section) (const char *, asection *),
9024 void (*layout_sections_again) (void))
9025 {
9026 bfd_size_type stub_group_size;
9027 bfd_boolean stubs_always_before_branch;
9028 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9029
9030 /* Stash our params away. */
9031 htab->add_stub_section = add_stub_section;
9032 htab->layout_sections_again = layout_sections_again;
9033 stubs_always_before_branch = group_size < 0;
9034 if (group_size < 0)
9035 stub_group_size = -group_size;
9036 else
9037 stub_group_size = group_size;
9038 if (stub_group_size == 1)
9039 {
9040 /* Default values. */
9041 if (stubs_always_before_branch)
9042 {
9043 stub_group_size = 0x1e00000;
9044 if (htab->has_14bit_branch)
9045 stub_group_size = 0x7800;
9046 }
9047 else
9048 {
9049 stub_group_size = 0x1c00000;
9050 if (htab->has_14bit_branch)
9051 stub_group_size = 0x7000;
9052 }
9053 }
9054
9055 group_sections (htab, stub_group_size, stubs_always_before_branch);
9056
9057 while (1)
9058 {
9059 bfd *input_bfd;
9060 unsigned int bfd_indx;
9061 asection *stub_sec;
9062
9063 htab->stub_iteration += 1;
9064
9065 for (input_bfd = info->input_bfds, bfd_indx = 0;
9066 input_bfd != NULL;
9067 input_bfd = input_bfd->link_next, bfd_indx++)
9068 {
9069 Elf_Internal_Shdr *symtab_hdr;
9070 asection *section;
9071 Elf_Internal_Sym *local_syms = NULL;
9072
9073 if (!is_ppc64_elf_target (input_bfd->xvec))
9074 continue;
9075
9076 /* We'll need the symbol table in a second. */
9077 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9078 if (symtab_hdr->sh_info == 0)
9079 continue;
9080
9081 /* Walk over each section attached to the input bfd. */
9082 for (section = input_bfd->sections;
9083 section != NULL;
9084 section = section->next)
9085 {
9086 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9087
9088 /* If there aren't any relocs, then there's nothing more
9089 to do. */
9090 if ((section->flags & SEC_RELOC) == 0
9091 || (section->flags & SEC_ALLOC) == 0
9092 || (section->flags & SEC_LOAD) == 0
9093 || (section->flags & SEC_CODE) == 0
9094 || section->reloc_count == 0)
9095 continue;
9096
9097 /* If this section is a link-once section that will be
9098 discarded, then don't create any stubs. */
9099 if (section->output_section == NULL
9100 || section->output_section->owner != output_bfd)
9101 continue;
9102
9103 /* Get the relocs. */
9104 internal_relocs
9105 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9106 info->keep_memory);
9107 if (internal_relocs == NULL)
9108 goto error_ret_free_local;
9109
9110 /* Now examine each relocation. */
9111 irela = internal_relocs;
9112 irelaend = irela + section->reloc_count;
9113 for (; irela < irelaend; irela++)
9114 {
9115 enum elf_ppc64_reloc_type r_type;
9116 unsigned int r_indx;
9117 enum ppc_stub_type stub_type;
9118 struct ppc_stub_hash_entry *stub_entry;
9119 asection *sym_sec, *code_sec;
9120 bfd_vma sym_value;
9121 bfd_vma destination;
9122 bfd_boolean ok_dest;
9123 struct ppc_link_hash_entry *hash;
9124 struct ppc_link_hash_entry *fdh;
9125 struct elf_link_hash_entry *h;
9126 Elf_Internal_Sym *sym;
9127 char *stub_name;
9128 const asection *id_sec;
9129 long *opd_adjust;
9130
9131 r_type = ELF64_R_TYPE (irela->r_info);
9132 r_indx = ELF64_R_SYM (irela->r_info);
9133
9134 if (r_type >= R_PPC64_max)
9135 {
9136 bfd_set_error (bfd_error_bad_value);
9137 goto error_ret_free_internal;
9138 }
9139
9140 /* Only look for stubs on branch instructions. */
9141 if (r_type != R_PPC64_REL24
9142 && r_type != R_PPC64_REL14
9143 && r_type != R_PPC64_REL14_BRTAKEN
9144 && r_type != R_PPC64_REL14_BRNTAKEN)
9145 continue;
9146
9147 /* Now determine the call target, its name, value,
9148 section. */
9149 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9150 r_indx, input_bfd))
9151 goto error_ret_free_internal;
9152 hash = (struct ppc_link_hash_entry *) h;
9153
9154 ok_dest = FALSE;
9155 fdh = NULL;
9156 sym_value = 0;
9157 if (hash == NULL)
9158 {
9159 sym_value = sym->st_value;
9160 ok_dest = TRUE;
9161 }
9162 else if (hash->elf.root.type == bfd_link_hash_defined
9163 || hash->elf.root.type == bfd_link_hash_defweak)
9164 {
9165 sym_value = hash->elf.root.u.def.value;
9166 if (sym_sec->output_section != NULL)
9167 ok_dest = TRUE;
9168 }
9169 else if (hash->elf.root.type == bfd_link_hash_undefweak
9170 || hash->elf.root.type == bfd_link_hash_undefined)
9171 {
9172 /* Recognise an old ABI func code entry sym, and
9173 use the func descriptor sym instead if it is
9174 defined. */
9175 if (hash->elf.root.root.string[0] == '.'
9176 && (fdh = get_fdh (hash, htab)) != NULL)
9177 {
9178 if (fdh->elf.root.type == bfd_link_hash_defined
9179 || fdh->elf.root.type == bfd_link_hash_defweak)
9180 {
9181 sym_sec = fdh->elf.root.u.def.section;
9182 sym_value = fdh->elf.root.u.def.value;
9183 if (sym_sec->output_section != NULL)
9184 ok_dest = TRUE;
9185 }
9186 else
9187 fdh = NULL;
9188 }
9189 }
9190 else
9191 {
9192 bfd_set_error (bfd_error_bad_value);
9193 goto error_ret_free_internal;
9194 }
9195
9196 destination = 0;
9197 if (ok_dest)
9198 {
9199 sym_value += irela->r_addend;
9200 destination = (sym_value
9201 + sym_sec->output_offset
9202 + sym_sec->output_section->vma);
9203 }
9204
9205 code_sec = sym_sec;
9206 opd_adjust = get_opd_info (sym_sec);
9207 if (opd_adjust != NULL)
9208 {
9209 bfd_vma dest;
9210
9211 if (hash == NULL)
9212 {
9213 long adjust = opd_adjust[sym_value / 8];
9214 if (adjust == -1)
9215 continue;
9216 sym_value += adjust;
9217 }
9218 dest = opd_entry_value (sym_sec, sym_value,
9219 &code_sec, &sym_value);
9220 if (dest != (bfd_vma) -1)
9221 {
9222 destination = dest;
9223 if (fdh != NULL)
9224 {
9225 /* Fixup old ABI sym to point at code
9226 entry. */
9227 hash->elf.root.type = bfd_link_hash_defweak;
9228 hash->elf.root.u.def.section = code_sec;
9229 hash->elf.root.u.def.value = sym_value;
9230 }
9231 }
9232 }
9233
9234 /* Determine what (if any) linker stub is needed. */
9235 stub_type = ppc_type_of_stub (section, irela, &hash,
9236 destination);
9237
9238 if (stub_type != ppc_stub_plt_call)
9239 {
9240 /* Check whether we need a TOC adjusting stub.
9241 Since the linker pastes together pieces from
9242 different object files when creating the
9243 _init and _fini functions, it may be that a
9244 call to what looks like a local sym is in
9245 fact a call needing a TOC adjustment. */
9246 if (code_sec != NULL
9247 && code_sec->output_section != NULL
9248 && (htab->stub_group[code_sec->id].toc_off
9249 != htab->stub_group[section->id].toc_off)
9250 && (code_sec->has_toc_reloc
9251 || code_sec->makes_toc_func_call))
9252 stub_type = ppc_stub_long_branch_r2off;
9253 }
9254
9255 if (stub_type == ppc_stub_none)
9256 continue;
9257
9258 /* __tls_get_addr calls might be eliminated. */
9259 if (stub_type != ppc_stub_plt_call
9260 && hash != NULL
9261 && (hash == htab->tls_get_addr
9262 || hash == htab->tls_get_addr_fd)
9263 && section->has_tls_reloc
9264 && irela != internal_relocs)
9265 {
9266 /* Get tls info. */
9267 char *tls_mask;
9268
9269 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9270 irela - 1, input_bfd))
9271 goto error_ret_free_internal;
9272 if (*tls_mask != 0)
9273 continue;
9274 }
9275
9276 /* Support for grouping stub sections. */
9277 id_sec = htab->stub_group[section->id].link_sec;
9278
9279 /* Get the name of this stub. */
9280 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9281 if (!stub_name)
9282 goto error_ret_free_internal;
9283
9284 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9285 stub_name, FALSE, FALSE);
9286 if (stub_entry != NULL)
9287 {
9288 /* The proper stub has already been created. */
9289 free (stub_name);
9290 continue;
9291 }
9292
9293 stub_entry = ppc_add_stub (stub_name, section, htab);
9294 if (stub_entry == NULL)
9295 {
9296 free (stub_name);
9297 error_ret_free_internal:
9298 if (elf_section_data (section)->relocs == NULL)
9299 free (internal_relocs);
9300 error_ret_free_local:
9301 if (local_syms != NULL
9302 && (symtab_hdr->contents
9303 != (unsigned char *) local_syms))
9304 free (local_syms);
9305 return FALSE;
9306 }
9307
9308 stub_entry->stub_type = stub_type;
9309 stub_entry->target_value = sym_value;
9310 stub_entry->target_section = code_sec;
9311 stub_entry->h = hash;
9312 stub_entry->addend = irela->r_addend;
9313
9314 if (stub_entry->h != NULL)
9315 htab->stub_globals += 1;
9316 }
9317
9318 /* We're done with the internal relocs, free them. */
9319 if (elf_section_data (section)->relocs != internal_relocs)
9320 free (internal_relocs);
9321 }
9322
9323 if (local_syms != NULL
9324 && symtab_hdr->contents != (unsigned char *) local_syms)
9325 {
9326 if (!info->keep_memory)
9327 free (local_syms);
9328 else
9329 symtab_hdr->contents = (unsigned char *) local_syms;
9330 }
9331 }
9332
9333 /* We may have added some stubs. Find out the new size of the
9334 stub sections. */
9335 for (stub_sec = htab->stub_bfd->sections;
9336 stub_sec != NULL;
9337 stub_sec = stub_sec->next)
9338 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9339 {
9340 stub_sec->rawsize = stub_sec->size;
9341 stub_sec->size = 0;
9342 stub_sec->reloc_count = 0;
9343 }
9344
9345 htab->brlt->size = 0;
9346 if (htab->relbrlt != NULL)
9347 htab->relbrlt->size = 0;
9348
9349 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9350
9351 for (stub_sec = htab->stub_bfd->sections;
9352 stub_sec != NULL;
9353 stub_sec = stub_sec->next)
9354 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9355 && stub_sec->rawsize != stub_sec->size)
9356 break;
9357
9358 /* Exit from this loop when no stubs have been added, and no stubs
9359 have changed size. */
9360 if (stub_sec == NULL)
9361 break;
9362
9363 /* Ask the linker to do its stuff. */
9364 (*htab->layout_sections_again) ();
9365 }
9366
9367 /* It would be nice to strip htab->brlt from the output if the
9368 section is empty, but it's too late. If we strip sections here,
9369 the dynamic symbol table is corrupted since the section symbol
9370 for the stripped section isn't written. */
9371
9372 return TRUE;
9373 }
9374
9375 /* Called after we have determined section placement. If sections
9376 move, we'll be called again. Provide a value for TOCstart. */
9377
9378 bfd_vma
9379 ppc64_elf_toc (bfd *obfd)
9380 {
9381 asection *s;
9382 bfd_vma TOCstart;
9383
9384 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9385 order. The TOC starts where the first of these sections starts. */
9386 s = bfd_get_section_by_name (obfd, ".got");
9387 if (s == NULL)
9388 s = bfd_get_section_by_name (obfd, ".toc");
9389 if (s == NULL)
9390 s = bfd_get_section_by_name (obfd, ".tocbss");
9391 if (s == NULL)
9392 s = bfd_get_section_by_name (obfd, ".plt");
9393 if (s == NULL)
9394 {
9395 /* This may happen for
9396 o references to TOC base (SYM@toc / TOC[tc0]) without a
9397 .toc directive
9398 o bad linker script
9399 o --gc-sections and empty TOC sections
9400
9401 FIXME: Warn user? */
9402
9403 /* Look for a likely section. We probably won't even be
9404 using TOCstart. */
9405 for (s = obfd->sections; s != NULL; s = s->next)
9406 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9407 == (SEC_ALLOC | SEC_SMALL_DATA))
9408 break;
9409 if (s == NULL)
9410 for (s = obfd->sections; s != NULL; s = s->next)
9411 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9412 == (SEC_ALLOC | SEC_SMALL_DATA))
9413 break;
9414 if (s == NULL)
9415 for (s = obfd->sections; s != NULL; s = s->next)
9416 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9417 break;
9418 if (s == NULL)
9419 for (s = obfd->sections; s != NULL; s = s->next)
9420 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9421 break;
9422 }
9423
9424 TOCstart = 0;
9425 if (s != NULL)
9426 TOCstart = s->output_section->vma + s->output_offset;
9427
9428 return TOCstart;
9429 }
9430
9431 /* Build all the stubs associated with the current output file.
9432 The stubs are kept in a hash table attached to the main linker
9433 hash table. This function is called via gldelf64ppc_finish. */
9434
9435 bfd_boolean
9436 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9437 struct bfd_link_info *info,
9438 char **stats)
9439 {
9440 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9441 asection *stub_sec;
9442 bfd_byte *p;
9443 int stub_sec_count = 0;
9444
9445 htab->emit_stub_syms = emit_stub_syms;
9446
9447 /* Allocate memory to hold the linker stubs. */
9448 for (stub_sec = htab->stub_bfd->sections;
9449 stub_sec != NULL;
9450 stub_sec = stub_sec->next)
9451 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9452 && stub_sec->size != 0)
9453 {
9454 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9455 if (stub_sec->contents == NULL)
9456 return FALSE;
9457 /* We want to check that built size is the same as calculated
9458 size. rawsize is a convenient location to use. */
9459 stub_sec->rawsize = stub_sec->size;
9460 stub_sec->size = 0;
9461 }
9462
9463 if (htab->glink != NULL && htab->glink->size != 0)
9464 {
9465 unsigned int indx;
9466 bfd_vma plt0;
9467
9468 /* Build the .glink plt call stub. */
9469 if (htab->emit_stub_syms)
9470 {
9471 struct elf_link_hash_entry *h;
9472 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9473 if (h == NULL)
9474 return FALSE;
9475 if (h->root.type == bfd_link_hash_new)
9476 {
9477 h->root.type = bfd_link_hash_defined;
9478 h->root.u.def.section = htab->glink;
9479 h->root.u.def.value = 8;
9480 h->ref_regular = 1;
9481 h->def_regular = 1;
9482 h->ref_regular_nonweak = 1;
9483 h->forced_local = 1;
9484 h->non_elf = 0;
9485 }
9486 }
9487 p = htab->glink->contents;
9488 plt0 = (htab->plt->output_section->vma
9489 + htab->plt->output_offset
9490 - (htab->glink->output_section->vma
9491 + htab->glink->output_offset
9492 + 16));
9493 bfd_put_64 (htab->glink->owner, plt0, p);
9494 p += 8;
9495 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9496 p += 4;
9497 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9498 p += 4;
9499 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9500 p += 4;
9501 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9502 p += 4;
9503 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9504 p += 4;
9505 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9506 p += 4;
9507 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9508 p += 4;
9509 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9510 p += 4;
9511 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9512 p += 4;
9513 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9514 p += 4;
9515 bfd_put_32 (htab->glink->owner, BCTR, p);
9516 p += 4;
9517 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9518 {
9519 bfd_put_32 (htab->glink->owner, NOP, p);
9520 p += 4;
9521 }
9522
9523 /* Build the .glink lazy link call stubs. */
9524 indx = 0;
9525 while (p < htab->glink->contents + htab->glink->size)
9526 {
9527 if (indx < 0x8000)
9528 {
9529 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9530 p += 4;
9531 }
9532 else
9533 {
9534 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9535 p += 4;
9536 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9537 p += 4;
9538 }
9539 bfd_put_32 (htab->glink->owner,
9540 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9541 indx++;
9542 p += 4;
9543 }
9544 htab->glink->rawsize = p - htab->glink->contents;
9545 }
9546
9547 if (htab->brlt->size != 0)
9548 {
9549 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9550 htab->brlt->size);
9551 if (htab->brlt->contents == NULL)
9552 return FALSE;
9553 }
9554 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9555 {
9556 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9557 htab->relbrlt->size);
9558 if (htab->relbrlt->contents == NULL)
9559 return FALSE;
9560 }
9561
9562 /* Build the stubs as directed by the stub hash table. */
9563 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9564
9565 if (htab->relbrlt != NULL)
9566 htab->relbrlt->reloc_count = 0;
9567
9568 for (stub_sec = htab->stub_bfd->sections;
9569 stub_sec != NULL;
9570 stub_sec = stub_sec->next)
9571 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9572 {
9573 stub_sec_count += 1;
9574 if (stub_sec->rawsize != stub_sec->size)
9575 break;
9576 }
9577
9578 if (stub_sec != NULL
9579 || htab->glink->rawsize != htab->glink->size)
9580 {
9581 htab->stub_error = TRUE;
9582 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9583 }
9584
9585 if (htab->stub_error)
9586 return FALSE;
9587
9588 if (stats != NULL)
9589 {
9590 *stats = bfd_malloc (500);
9591 if (*stats == NULL)
9592 return FALSE;
9593
9594 sprintf (*stats, _("linker stubs in %u group%s\n"
9595 " branch %lu\n"
9596 " toc adjust %lu\n"
9597 " long branch %lu\n"
9598 " long toc adj %lu\n"
9599 " plt call %lu"),
9600 stub_sec_count,
9601 stub_sec_count == 1 ? "" : "s",
9602 htab->stub_count[ppc_stub_long_branch - 1],
9603 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9604 htab->stub_count[ppc_stub_plt_branch - 1],
9605 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9606 htab->stub_count[ppc_stub_plt_call - 1]);
9607 }
9608 return TRUE;
9609 }
9610
9611 /* This function undoes the changes made by add_symbol_adjust. */
9612
9613 static bfd_boolean
9614 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9615 {
9616 struct ppc_link_hash_entry *eh;
9617
9618 if (h->root.type == bfd_link_hash_indirect)
9619 return TRUE;
9620
9621 if (h->root.type == bfd_link_hash_warning)
9622 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9623
9624 eh = (struct ppc_link_hash_entry *) h;
9625 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9626 return TRUE;
9627
9628 eh->elf.root.type = bfd_link_hash_undefined;
9629 return TRUE;
9630 }
9631
9632 void
9633 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9634 {
9635 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9636 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9637 }
9638
9639 /* What to do when ld finds relocations against symbols defined in
9640 discarded sections. */
9641
9642 static unsigned int
9643 ppc64_elf_action_discarded (asection *sec)
9644 {
9645 if (strcmp (".opd", sec->name) == 0)
9646 return 0;
9647
9648 if (strcmp (".toc", sec->name) == 0)
9649 return 0;
9650
9651 if (strcmp (".toc1", sec->name) == 0)
9652 return 0;
9653
9654 return _bfd_elf_default_action_discarded (sec);
9655 }
9656
9657 /* The RELOCATE_SECTION function is called by the ELF backend linker
9658 to handle the relocations for a section.
9659
9660 The relocs are always passed as Rela structures; if the section
9661 actually uses Rel structures, the r_addend field will always be
9662 zero.
9663
9664 This function is responsible for adjust the section contents as
9665 necessary, and (if using Rela relocs and generating a
9666 relocatable output file) adjusting the reloc addend as
9667 necessary.
9668
9669 This function does not have to worry about setting the reloc
9670 address or the reloc symbol index.
9671
9672 LOCAL_SYMS is a pointer to the swapped in local symbols.
9673
9674 LOCAL_SECTIONS is an array giving the section in the input file
9675 corresponding to the st_shndx field of each local symbol.
9676
9677 The global hash table entry for the global symbols can be found
9678 via elf_sym_hashes (input_bfd).
9679
9680 When generating relocatable output, this function must handle
9681 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9682 going to be the section symbol corresponding to the output
9683 section, which means that the addend must be adjusted
9684 accordingly. */
9685
9686 static bfd_boolean
9687 ppc64_elf_relocate_section (bfd *output_bfd,
9688 struct bfd_link_info *info,
9689 bfd *input_bfd,
9690 asection *input_section,
9691 bfd_byte *contents,
9692 Elf_Internal_Rela *relocs,
9693 Elf_Internal_Sym *local_syms,
9694 asection **local_sections)
9695 {
9696 struct ppc_link_hash_table *htab;
9697 Elf_Internal_Shdr *symtab_hdr;
9698 struct elf_link_hash_entry **sym_hashes;
9699 Elf_Internal_Rela *rel;
9700 Elf_Internal_Rela *relend;
9701 Elf_Internal_Rela outrel;
9702 bfd_byte *loc;
9703 struct got_entry **local_got_ents;
9704 bfd_vma TOCstart;
9705 bfd_boolean ret = TRUE;
9706 bfd_boolean is_opd;
9707 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9708 bfd_boolean is_power4 = FALSE;
9709
9710 /* Initialize howto table if needed. */
9711 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9712 ppc_howto_init ();
9713
9714 htab = ppc_hash_table (info);
9715
9716 /* Don't relocate stub sections. */
9717 if (input_section->owner == htab->stub_bfd)
9718 return TRUE;
9719
9720 local_got_ents = elf_local_got_ents (input_bfd);
9721 TOCstart = elf_gp (output_bfd);
9722 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9723 sym_hashes = elf_sym_hashes (input_bfd);
9724 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9725
9726 rel = relocs;
9727 relend = relocs + input_section->reloc_count;
9728 for (; rel < relend; rel++)
9729 {
9730 enum elf_ppc64_reloc_type r_type;
9731 bfd_vma addend, orig_addend;
9732 bfd_reloc_status_type r;
9733 Elf_Internal_Sym *sym;
9734 asection *sec;
9735 struct elf_link_hash_entry *h_elf;
9736 struct ppc_link_hash_entry *h;
9737 struct ppc_link_hash_entry *fdh;
9738 const char *sym_name;
9739 unsigned long r_symndx, toc_symndx;
9740 char tls_mask, tls_gd, tls_type;
9741 char sym_type;
9742 bfd_vma relocation;
9743 bfd_boolean unresolved_reloc;
9744 bfd_boolean warned;
9745 unsigned long insn, mask;
9746 struct ppc_stub_hash_entry *stub_entry;
9747 bfd_vma max_br_offset;
9748 bfd_vma from;
9749
9750 r_type = ELF64_R_TYPE (rel->r_info);
9751 r_symndx = ELF64_R_SYM (rel->r_info);
9752
9753 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9754 symbol of the previous ADDR64 reloc. The symbol gives us the
9755 proper TOC base to use. */
9756 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9757 && rel != relocs
9758 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9759 && is_opd)
9760 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9761
9762 sym = NULL;
9763 sec = NULL;
9764 h_elf = NULL;
9765 sym_name = NULL;
9766 unresolved_reloc = FALSE;
9767 warned = FALSE;
9768 orig_addend = rel->r_addend;
9769
9770 if (r_symndx < symtab_hdr->sh_info)
9771 {
9772 /* It's a local symbol. */
9773 long *opd_adjust;
9774
9775 sym = local_syms + r_symndx;
9776 sec = local_sections[r_symndx];
9777 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9778 sym_type = ELF64_ST_TYPE (sym->st_info);
9779 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9780 opd_adjust = get_opd_info (sec);
9781 if (opd_adjust != NULL)
9782 {
9783 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9784 if (adjust == -1)
9785 relocation = 0;
9786 else
9787 {
9788 /* If this is a relocation against the opd section sym
9789 and we have edited .opd, adjust the reloc addend so
9790 that ld -r and ld --emit-relocs output is correct.
9791 If it is a reloc against some other .opd symbol,
9792 then the symbol value will be adjusted later. */
9793 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9794 rel->r_addend += adjust;
9795 else
9796 relocation += adjust;
9797 }
9798 }
9799 if (info->relocatable)
9800 continue;
9801 }
9802 else
9803 {
9804 if (info->relocatable)
9805 continue;
9806 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9807 r_symndx, symtab_hdr, sym_hashes,
9808 h_elf, sec, relocation,
9809 unresolved_reloc, warned);
9810 sym_name = h_elf->root.root.string;
9811 sym_type = h_elf->type;
9812 }
9813 h = (struct ppc_link_hash_entry *) h_elf;
9814
9815 /* TLS optimizations. Replace instruction sequences and relocs
9816 based on information we collected in tls_optimize. We edit
9817 RELOCS so that --emit-relocs will output something sensible
9818 for the final instruction stream. */
9819 tls_mask = 0;
9820 tls_gd = 0;
9821 toc_symndx = 0;
9822 if (IS_PPC64_TLS_RELOC (r_type))
9823 {
9824 if (h != NULL)
9825 tls_mask = h->tls_mask;
9826 else if (local_got_ents != NULL)
9827 {
9828 char *lgot_masks;
9829 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9830 tls_mask = lgot_masks[r_symndx];
9831 }
9832 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9833 {
9834 /* Check for toc tls entries. */
9835 char *toc_tls;
9836
9837 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9838 rel, input_bfd))
9839 return FALSE;
9840
9841 if (toc_tls)
9842 tls_mask = *toc_tls;
9843 }
9844 }
9845
9846 /* Check that tls relocs are used with tls syms, and non-tls
9847 relocs are used with non-tls syms. */
9848 if (r_symndx != 0
9849 && r_type != R_PPC64_NONE
9850 && (h == NULL
9851 || h->elf.root.type == bfd_link_hash_defined
9852 || h->elf.root.type == bfd_link_hash_defweak)
9853 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9854 {
9855 if (r_type == R_PPC64_TLS && tls_mask != 0)
9856 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9857 ;
9858 else
9859 (*_bfd_error_handler)
9860 (sym_type == STT_TLS
9861 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9862 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9863 input_bfd,
9864 input_section,
9865 (long) rel->r_offset,
9866 ppc64_elf_howto_table[r_type]->name,
9867 sym_name);
9868 }
9869
9870 /* Ensure reloc mapping code below stays sane. */
9871 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9872 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9873 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9874 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9875 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9876 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9877 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9878 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9879 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9880 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9881 abort ();
9882
9883 switch (r_type)
9884 {
9885 default:
9886 break;
9887
9888 case R_PPC64_TOC16:
9889 case R_PPC64_TOC16_LO:
9890 case R_PPC64_TOC16_DS:
9891 case R_PPC64_TOC16_LO_DS:
9892 {
9893 /* Check for toc tls entries. */
9894 char *toc_tls;
9895 int retval;
9896
9897 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9898 rel, input_bfd);
9899 if (retval == 0)
9900 return FALSE;
9901
9902 if (toc_tls)
9903 {
9904 tls_mask = *toc_tls;
9905 if (r_type == R_PPC64_TOC16_DS
9906 || r_type == R_PPC64_TOC16_LO_DS)
9907 {
9908 if (tls_mask != 0
9909 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9910 goto toctprel;
9911 }
9912 else
9913 {
9914 /* If we found a GD reloc pair, then we might be
9915 doing a GD->IE transition. */
9916 if (retval == 2)
9917 {
9918 tls_gd = TLS_TPRELGD;
9919 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9920 goto tls_get_addr_check;
9921 }
9922 else if (retval == 3)
9923 {
9924 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9925 goto tls_get_addr_check;
9926 }
9927 }
9928 }
9929 }
9930 break;
9931
9932 case R_PPC64_GOT_TPREL16_DS:
9933 case R_PPC64_GOT_TPREL16_LO_DS:
9934 if (tls_mask != 0
9935 && (tls_mask & TLS_TPREL) == 0)
9936 {
9937 toctprel:
9938 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9939 insn &= 31 << 21;
9940 insn |= 0x3c0d0000; /* addis 0,13,0 */
9941 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9942 r_type = R_PPC64_TPREL16_HA;
9943 if (toc_symndx != 0)
9944 {
9945 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9946 /* We changed the symbol. Start over in order to
9947 get h, sym, sec etc. right. */
9948 rel--;
9949 continue;
9950 }
9951 else
9952 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9953 }
9954 break;
9955
9956 case R_PPC64_TLS:
9957 if (tls_mask != 0
9958 && (tls_mask & TLS_TPREL) == 0)
9959 {
9960 bfd_vma rtra;
9961 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9962 if ((insn & ((0x3f << 26) | (31 << 11)))
9963 == ((31 << 26) | (13 << 11)))
9964 rtra = insn & ((1 << 26) - (1 << 16));
9965 else if ((insn & ((0x3f << 26) | (31 << 16)))
9966 == ((31 << 26) | (13 << 16)))
9967 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9968 else
9969 abort ();
9970 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9971 /* add -> addi. */
9972 insn = 14 << 26;
9973 else if ((insn & (31 << 1)) == 23 << 1
9974 && ((insn & (31 << 6)) < 14 << 6
9975 || ((insn & (31 << 6)) >= 16 << 6
9976 && (insn & (31 << 6)) < 24 << 6)))
9977 /* load and store indexed -> dform. */
9978 insn = (32 | ((insn >> 6) & 31)) << 26;
9979 else if ((insn & (31 << 1)) == 21 << 1
9980 && (insn & (0x1a << 6)) == 0)
9981 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9982 insn = (((58 | ((insn >> 6) & 4)) << 26)
9983 | ((insn >> 6) & 1));
9984 else if ((insn & (31 << 1)) == 21 << 1
9985 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9986 /* lwax -> lwa. */
9987 insn = (58 << 26) | 2;
9988 else
9989 abort ();
9990 insn |= rtra;
9991 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9992 /* Was PPC64_TLS which sits on insn boundary, now
9993 PPC64_TPREL16_LO which is at insn+2. */
9994 rel->r_offset += 2;
9995 r_type = R_PPC64_TPREL16_LO;
9996 if (toc_symndx != 0)
9997 {
9998 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9999 /* We changed the symbol. Start over in order to
10000 get h, sym, sec etc. right. */
10001 rel--;
10002 continue;
10003 }
10004 else
10005 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10006 }
10007 break;
10008
10009 case R_PPC64_GOT_TLSGD16_HI:
10010 case R_PPC64_GOT_TLSGD16_HA:
10011 tls_gd = TLS_TPRELGD;
10012 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10013 goto tls_gdld_hi;
10014 break;
10015
10016 case R_PPC64_GOT_TLSLD16_HI:
10017 case R_PPC64_GOT_TLSLD16_HA:
10018 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10019 {
10020 tls_gdld_hi:
10021 if ((tls_mask & tls_gd) != 0)
10022 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10023 + R_PPC64_GOT_TPREL16_DS);
10024 else
10025 {
10026 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10027 rel->r_offset -= 2;
10028 r_type = R_PPC64_NONE;
10029 }
10030 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10031 }
10032 break;
10033
10034 case R_PPC64_GOT_TLSGD16:
10035 case R_PPC64_GOT_TLSGD16_LO:
10036 tls_gd = TLS_TPRELGD;
10037 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10038 goto tls_get_addr_check;
10039 break;
10040
10041 case R_PPC64_GOT_TLSLD16:
10042 case R_PPC64_GOT_TLSLD16_LO:
10043 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10044 {
10045 tls_get_addr_check:
10046 if (rel + 1 < relend)
10047 {
10048 enum elf_ppc64_reloc_type r_type2;
10049 unsigned long r_symndx2;
10050 struct elf_link_hash_entry *h2;
10051 bfd_vma insn1, insn2, insn3;
10052 bfd_vma offset;
10053
10054 /* The next instruction should be a call to
10055 __tls_get_addr. Peek at the reloc to be sure. */
10056 r_type2 = ELF64_R_TYPE (rel[1].r_info);
10057 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
10058 if (r_symndx2 < symtab_hdr->sh_info
10059 || (r_type2 != R_PPC64_REL14
10060 && r_type2 != R_PPC64_REL14_BRTAKEN
10061 && r_type2 != R_PPC64_REL14_BRNTAKEN
10062 && r_type2 != R_PPC64_REL24))
10063 break;
10064
10065 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
10066 while (h2->root.type == bfd_link_hash_indirect
10067 || h2->root.type == bfd_link_hash_warning)
10068 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
10069 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
10070 && h2 != &htab->tls_get_addr_fd->elf))
10071 break;
10072
10073 /* OK, it checks out. Replace the call. */
10074 offset = rel[1].r_offset;
10075 insn1 = bfd_get_32 (output_bfd,
10076 contents + rel->r_offset - 2);
10077 insn3 = bfd_get_32 (output_bfd,
10078 contents + offset + 4);
10079 if ((tls_mask & tls_gd) != 0)
10080 {
10081 /* IE */
10082 insn1 &= (1 << 26) - (1 << 2);
10083 insn1 |= 58 << 26; /* ld */
10084 insn2 = 0x7c636a14; /* add 3,3,13 */
10085 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
10086 if ((tls_mask & TLS_EXPLICIT) == 0)
10087 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10088 + R_PPC64_GOT_TPREL16_DS);
10089 else
10090 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10091 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10092 }
10093 else
10094 {
10095 /* LE */
10096 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10097 insn2 = 0x38630000; /* addi 3,3,0 */
10098 if (tls_gd == 0)
10099 {
10100 /* Was an LD reloc. */
10101 r_symndx = 0;
10102 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10103 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10104 }
10105 else if (toc_symndx != 0)
10106 r_symndx = toc_symndx;
10107 r_type = R_PPC64_TPREL16_HA;
10108 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10109 rel[1].r_info = ELF64_R_INFO (r_symndx,
10110 R_PPC64_TPREL16_LO);
10111 rel[1].r_offset += 2;
10112 }
10113 if (insn3 == NOP
10114 || insn3 == CROR_151515 || insn3 == CROR_313131)
10115 {
10116 insn3 = insn2;
10117 insn2 = NOP;
10118 rel[1].r_offset += 4;
10119 }
10120 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
10121 bfd_put_32 (output_bfd, insn2, contents + offset);
10122 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10123 if (tls_gd == 0 || toc_symndx != 0)
10124 {
10125 /* We changed the symbol. Start over in order
10126 to get h, sym, sec etc. right. */
10127 rel--;
10128 continue;
10129 }
10130 }
10131 }
10132 break;
10133
10134 case R_PPC64_DTPMOD64:
10135 if (rel + 1 < relend
10136 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10137 && rel[1].r_offset == rel->r_offset + 8)
10138 {
10139 if ((tls_mask & TLS_GD) == 0)
10140 {
10141 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10142 if ((tls_mask & TLS_TPRELGD) != 0)
10143 r_type = R_PPC64_TPREL64;
10144 else
10145 {
10146 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10147 r_type = R_PPC64_NONE;
10148 }
10149 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10150 }
10151 }
10152 else
10153 {
10154 if ((tls_mask & TLS_LD) == 0)
10155 {
10156 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10157 r_type = R_PPC64_NONE;
10158 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10159 }
10160 }
10161 break;
10162
10163 case R_PPC64_TPREL64:
10164 if ((tls_mask & TLS_TPREL) == 0)
10165 {
10166 r_type = R_PPC64_NONE;
10167 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10168 }
10169 break;
10170 }
10171
10172 /* Handle other relocations that tweak non-addend part of insn. */
10173 insn = 0;
10174 max_br_offset = 1 << 25;
10175 addend = rel->r_addend;
10176 switch (r_type)
10177 {
10178 default:
10179 break;
10180
10181 /* Branch taken prediction relocations. */
10182 case R_PPC64_ADDR14_BRTAKEN:
10183 case R_PPC64_REL14_BRTAKEN:
10184 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10185 /* Fall thru. */
10186
10187 /* Branch not taken prediction relocations. */
10188 case R_PPC64_ADDR14_BRNTAKEN:
10189 case R_PPC64_REL14_BRNTAKEN:
10190 insn |= bfd_get_32 (output_bfd,
10191 contents + rel->r_offset) & ~(0x01 << 21);
10192 /* Fall thru. */
10193
10194 case R_PPC64_REL14:
10195 max_br_offset = 1 << 15;
10196 /* Fall thru. */
10197
10198 case R_PPC64_REL24:
10199 /* Calls to functions with a different TOC, such as calls to
10200 shared objects, need to alter the TOC pointer. This is
10201 done using a linkage stub. A REL24 branching to these
10202 linkage stubs needs to be followed by a nop, as the nop
10203 will be replaced with an instruction to restore the TOC
10204 base pointer. */
10205 stub_entry = NULL;
10206 fdh = h;
10207 if (((h != NULL
10208 && (((fdh = h->oh) != NULL
10209 && fdh->elf.plt.plist != NULL)
10210 || (fdh = h)->elf.plt.plist != NULL))
10211 || (sec != NULL
10212 && sec->output_section != NULL
10213 && sec->id <= htab->top_id
10214 && (htab->stub_group[sec->id].toc_off
10215 != htab->stub_group[input_section->id].toc_off)))
10216 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10217 rel, htab)) != NULL
10218 && (stub_entry->stub_type == ppc_stub_plt_call
10219 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10220 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10221 {
10222 bfd_boolean can_plt_call = FALSE;
10223
10224 if (rel->r_offset + 8 <= input_section->size)
10225 {
10226 unsigned long nop;
10227 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10228 if (nop == NOP
10229 || nop == CROR_151515 || nop == CROR_313131)
10230 {
10231 bfd_put_32 (input_bfd, LD_R2_40R1,
10232 contents + rel->r_offset + 4);
10233 can_plt_call = TRUE;
10234 }
10235 }
10236
10237 if (!can_plt_call)
10238 {
10239 if (stub_entry->stub_type == ppc_stub_plt_call)
10240 {
10241 /* If this is a plain branch rather than a branch
10242 and link, don't require a nop. However, don't
10243 allow tail calls in a shared library as they
10244 will result in r2 being corrupted. */
10245 unsigned long br;
10246 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10247 if (info->executable && (br & 1) == 0)
10248 can_plt_call = TRUE;
10249 else
10250 stub_entry = NULL;
10251 }
10252 else if (h != NULL
10253 && strcmp (h->elf.root.root.string,
10254 ".__libc_start_main") == 0)
10255 {
10256 /* Allow crt1 branch to go via a toc adjusting stub. */
10257 can_plt_call = TRUE;
10258 }
10259 else
10260 {
10261 if (strcmp (input_section->output_section->name,
10262 ".init") == 0
10263 || strcmp (input_section->output_section->name,
10264 ".fini") == 0)
10265 (*_bfd_error_handler)
10266 (_("%B(%A+0x%lx): automatic multiple TOCs "
10267 "not supported using your crt files; "
10268 "recompile with -mminimal-toc or upgrade gcc"),
10269 input_bfd,
10270 input_section,
10271 (long) rel->r_offset);
10272 else
10273 (*_bfd_error_handler)
10274 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10275 "does not allow automatic multiple TOCs; "
10276 "recompile with -mminimal-toc or "
10277 "-fno-optimize-sibling-calls, "
10278 "or make `%s' extern"),
10279 input_bfd,
10280 input_section,
10281 (long) rel->r_offset,
10282 sym_name,
10283 sym_name);
10284 bfd_set_error (bfd_error_bad_value);
10285 ret = FALSE;
10286 }
10287 }
10288
10289 if (can_plt_call
10290 && stub_entry->stub_type == ppc_stub_plt_call)
10291 unresolved_reloc = FALSE;
10292 }
10293
10294 if (stub_entry == NULL
10295 && get_opd_info (sec) != NULL)
10296 {
10297 /* The branch destination is the value of the opd entry. */
10298 bfd_vma off = (relocation + addend
10299 - sec->output_section->vma
10300 - sec->output_offset);
10301 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10302 if (dest != (bfd_vma) -1)
10303 {
10304 relocation = dest;
10305 addend = 0;
10306 }
10307 }
10308
10309 /* If the branch is out of reach we ought to have a long
10310 branch stub. */
10311 from = (rel->r_offset
10312 + input_section->output_offset
10313 + input_section->output_section->vma);
10314
10315 if (stub_entry == NULL
10316 && (relocation + addend - from + max_br_offset
10317 >= 2 * max_br_offset)
10318 && r_type != R_PPC64_ADDR14_BRTAKEN
10319 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10320 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10321 htab);
10322
10323 if (stub_entry != NULL)
10324 {
10325 /* Munge up the value and addend so that we call the stub
10326 rather than the procedure directly. */
10327 relocation = (stub_entry->stub_offset
10328 + stub_entry->stub_sec->output_offset
10329 + stub_entry->stub_sec->output_section->vma);
10330 addend = 0;
10331 }
10332
10333 if (insn != 0)
10334 {
10335 if (is_power4)
10336 {
10337 /* Set 'a' bit. This is 0b00010 in BO field for branch
10338 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10339 for branch on CTR insns (BO == 1a00t or 1a01t). */
10340 if ((insn & (0x14 << 21)) == (0x04 << 21))
10341 insn |= 0x02 << 21;
10342 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10343 insn |= 0x08 << 21;
10344 else
10345 break;
10346 }
10347 else
10348 {
10349 /* Invert 'y' bit if not the default. */
10350 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10351 insn ^= 0x01 << 21;
10352 }
10353
10354 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10355 }
10356
10357 /* NOP out calls to undefined weak functions.
10358 We can thus call a weak function without first
10359 checking whether the function is defined. */
10360 else if (h != NULL
10361 && h->elf.root.type == bfd_link_hash_undefweak
10362 && r_type == R_PPC64_REL24
10363 && relocation == 0
10364 && addend == 0)
10365 {
10366 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10367 continue;
10368 }
10369 break;
10370 }
10371
10372 /* Set `addend'. */
10373 tls_type = 0;
10374 switch (r_type)
10375 {
10376 default:
10377 (*_bfd_error_handler)
10378 (_("%B: unknown relocation type %d for symbol %s"),
10379 input_bfd, (int) r_type, sym_name);
10380
10381 bfd_set_error (bfd_error_bad_value);
10382 ret = FALSE;
10383 continue;
10384
10385 case R_PPC64_NONE:
10386 case R_PPC64_TLS:
10387 case R_PPC64_GNU_VTINHERIT:
10388 case R_PPC64_GNU_VTENTRY:
10389 continue;
10390
10391 /* GOT16 relocations. Like an ADDR16 using the symbol's
10392 address in the GOT as relocation value instead of the
10393 symbol's value itself. Also, create a GOT entry for the
10394 symbol and put the symbol value there. */
10395 case R_PPC64_GOT_TLSGD16:
10396 case R_PPC64_GOT_TLSGD16_LO:
10397 case R_PPC64_GOT_TLSGD16_HI:
10398 case R_PPC64_GOT_TLSGD16_HA:
10399 tls_type = TLS_TLS | TLS_GD;
10400 goto dogot;
10401
10402 case R_PPC64_GOT_TLSLD16:
10403 case R_PPC64_GOT_TLSLD16_LO:
10404 case R_PPC64_GOT_TLSLD16_HI:
10405 case R_PPC64_GOT_TLSLD16_HA:
10406 tls_type = TLS_TLS | TLS_LD;
10407 goto dogot;
10408
10409 case R_PPC64_GOT_TPREL16_DS:
10410 case R_PPC64_GOT_TPREL16_LO_DS:
10411 case R_PPC64_GOT_TPREL16_HI:
10412 case R_PPC64_GOT_TPREL16_HA:
10413 tls_type = TLS_TLS | TLS_TPREL;
10414 goto dogot;
10415
10416 case R_PPC64_GOT_DTPREL16_DS:
10417 case R_PPC64_GOT_DTPREL16_LO_DS:
10418 case R_PPC64_GOT_DTPREL16_HI:
10419 case R_PPC64_GOT_DTPREL16_HA:
10420 tls_type = TLS_TLS | TLS_DTPREL;
10421 goto dogot;
10422
10423 case R_PPC64_GOT16:
10424 case R_PPC64_GOT16_LO:
10425 case R_PPC64_GOT16_HI:
10426 case R_PPC64_GOT16_HA:
10427 case R_PPC64_GOT16_DS:
10428 case R_PPC64_GOT16_LO_DS:
10429 dogot:
10430 {
10431 /* Relocation is to the entry for this symbol in the global
10432 offset table. */
10433 asection *got;
10434 bfd_vma *offp;
10435 bfd_vma off;
10436 unsigned long indx = 0;
10437
10438 if (tls_type == (TLS_TLS | TLS_LD)
10439 && (h == NULL
10440 || !h->elf.def_dynamic))
10441 offp = &ppc64_tlsld_got (input_bfd)->offset;
10442 else
10443 {
10444 struct got_entry *ent;
10445
10446 if (h != NULL)
10447 {
10448 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10449 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10450 &h->elf)
10451 || (info->shared
10452 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10453 /* This is actually a static link, or it is a
10454 -Bsymbolic link and the symbol is defined
10455 locally, or the symbol was forced to be local
10456 because of a version file. */
10457 ;
10458 else
10459 {
10460 indx = h->elf.dynindx;
10461 unresolved_reloc = FALSE;
10462 }
10463 ent = h->elf.got.glist;
10464 }
10465 else
10466 {
10467 if (local_got_ents == NULL)
10468 abort ();
10469 ent = local_got_ents[r_symndx];
10470 }
10471
10472 for (; ent != NULL; ent = ent->next)
10473 if (ent->addend == orig_addend
10474 && ent->owner == input_bfd
10475 && ent->tls_type == tls_type)
10476 break;
10477 if (ent == NULL)
10478 abort ();
10479 offp = &ent->got.offset;
10480 }
10481
10482 got = ppc64_elf_tdata (input_bfd)->got;
10483 if (got == NULL)
10484 abort ();
10485
10486 /* The offset must always be a multiple of 8. We use the
10487 least significant bit to record whether we have already
10488 processed this entry. */
10489 off = *offp;
10490 if ((off & 1) != 0)
10491 off &= ~1;
10492 else
10493 {
10494 /* Generate relocs for the dynamic linker, except in
10495 the case of TLSLD where we'll use one entry per
10496 module. */
10497 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10498
10499 *offp = off | 1;
10500 if ((info->shared || indx != 0)
10501 && (h == NULL
10502 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10503 || h->elf.root.type != bfd_link_hash_undefweak))
10504 {
10505 outrel.r_offset = (got->output_section->vma
10506 + got->output_offset
10507 + off);
10508 outrel.r_addend = addend;
10509 if (tls_type & (TLS_LD | TLS_GD))
10510 {
10511 outrel.r_addend = 0;
10512 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10513 if (tls_type == (TLS_TLS | TLS_GD))
10514 {
10515 loc = relgot->contents;
10516 loc += (relgot->reloc_count++
10517 * sizeof (Elf64_External_Rela));
10518 bfd_elf64_swap_reloca_out (output_bfd,
10519 &outrel, loc);
10520 outrel.r_offset += 8;
10521 outrel.r_addend = addend;
10522 outrel.r_info
10523 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10524 }
10525 }
10526 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10527 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10528 else if (tls_type == (TLS_TLS | TLS_TPREL))
10529 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10530 else if (indx == 0)
10531 {
10532 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10533
10534 /* Write the .got section contents for the sake
10535 of prelink. */
10536 loc = got->contents + off;
10537 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10538 loc);
10539 }
10540 else
10541 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10542
10543 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10544 {
10545 outrel.r_addend += relocation;
10546 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10547 outrel.r_addend -= htab->elf.tls_sec->vma;
10548 }
10549 loc = relgot->contents;
10550 loc += (relgot->reloc_count++
10551 * sizeof (Elf64_External_Rela));
10552 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10553 }
10554
10555 /* Init the .got section contents here if we're not
10556 emitting a reloc. */
10557 else
10558 {
10559 relocation += addend;
10560 if (tls_type == (TLS_TLS | TLS_LD))
10561 relocation = 1;
10562 else if (tls_type != 0)
10563 {
10564 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10565 if (tls_type == (TLS_TLS | TLS_TPREL))
10566 relocation += DTP_OFFSET - TP_OFFSET;
10567
10568 if (tls_type == (TLS_TLS | TLS_GD))
10569 {
10570 bfd_put_64 (output_bfd, relocation,
10571 got->contents + off + 8);
10572 relocation = 1;
10573 }
10574 }
10575
10576 bfd_put_64 (output_bfd, relocation,
10577 got->contents + off);
10578 }
10579 }
10580
10581 if (off >= (bfd_vma) -2)
10582 abort ();
10583
10584 relocation = got->output_offset + off;
10585
10586 /* TOC base (r2) is TOC start plus 0x8000. */
10587 addend = -TOC_BASE_OFF;
10588 }
10589 break;
10590
10591 case R_PPC64_PLT16_HA:
10592 case R_PPC64_PLT16_HI:
10593 case R_PPC64_PLT16_LO:
10594 case R_PPC64_PLT32:
10595 case R_PPC64_PLT64:
10596 /* Relocation is to the entry for this symbol in the
10597 procedure linkage table. */
10598
10599 /* Resolve a PLT reloc against a local symbol directly,
10600 without using the procedure linkage table. */
10601 if (h == NULL)
10602 break;
10603
10604 /* It's possible that we didn't make a PLT entry for this
10605 symbol. This happens when statically linking PIC code,
10606 or when using -Bsymbolic. Go find a match if there is a
10607 PLT entry. */
10608 if (htab->plt != NULL)
10609 {
10610 struct plt_entry *ent;
10611 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10612 if (ent->addend == orig_addend
10613 && ent->plt.offset != (bfd_vma) -1)
10614 {
10615 relocation = (htab->plt->output_section->vma
10616 + htab->plt->output_offset
10617 + ent->plt.offset);
10618 unresolved_reloc = FALSE;
10619 }
10620 }
10621 break;
10622
10623 case R_PPC64_TOC:
10624 /* Relocation value is TOC base. */
10625 relocation = TOCstart;
10626 if (r_symndx == 0)
10627 relocation += htab->stub_group[input_section->id].toc_off;
10628 else if (unresolved_reloc)
10629 ;
10630 else if (sec != NULL && sec->id <= htab->top_id)
10631 relocation += htab->stub_group[sec->id].toc_off;
10632 else
10633 unresolved_reloc = TRUE;
10634 goto dodyn2;
10635
10636 /* TOC16 relocs. We want the offset relative to the TOC base,
10637 which is the address of the start of the TOC plus 0x8000.
10638 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10639 in this order. */
10640 case R_PPC64_TOC16:
10641 case R_PPC64_TOC16_LO:
10642 case R_PPC64_TOC16_HI:
10643 case R_PPC64_TOC16_DS:
10644 case R_PPC64_TOC16_LO_DS:
10645 case R_PPC64_TOC16_HA:
10646 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10647 break;
10648
10649 /* Relocate against the beginning of the section. */
10650 case R_PPC64_SECTOFF:
10651 case R_PPC64_SECTOFF_LO:
10652 case R_PPC64_SECTOFF_HI:
10653 case R_PPC64_SECTOFF_DS:
10654 case R_PPC64_SECTOFF_LO_DS:
10655 case R_PPC64_SECTOFF_HA:
10656 if (sec != NULL)
10657 addend -= sec->output_section->vma;
10658 break;
10659
10660 case R_PPC64_REL14:
10661 case R_PPC64_REL14_BRNTAKEN:
10662 case R_PPC64_REL14_BRTAKEN:
10663 case R_PPC64_REL24:
10664 break;
10665
10666 case R_PPC64_TPREL16:
10667 case R_PPC64_TPREL16_LO:
10668 case R_PPC64_TPREL16_HI:
10669 case R_PPC64_TPREL16_HA:
10670 case R_PPC64_TPREL16_DS:
10671 case R_PPC64_TPREL16_LO_DS:
10672 case R_PPC64_TPREL16_HIGHER:
10673 case R_PPC64_TPREL16_HIGHERA:
10674 case R_PPC64_TPREL16_HIGHEST:
10675 case R_PPC64_TPREL16_HIGHESTA:
10676 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10677 if (info->shared)
10678 /* The TPREL16 relocs shouldn't really be used in shared
10679 libs as they will result in DT_TEXTREL being set, but
10680 support them anyway. */
10681 goto dodyn;
10682 break;
10683
10684 case R_PPC64_DTPREL16:
10685 case R_PPC64_DTPREL16_LO:
10686 case R_PPC64_DTPREL16_HI:
10687 case R_PPC64_DTPREL16_HA:
10688 case R_PPC64_DTPREL16_DS:
10689 case R_PPC64_DTPREL16_LO_DS:
10690 case R_PPC64_DTPREL16_HIGHER:
10691 case R_PPC64_DTPREL16_HIGHERA:
10692 case R_PPC64_DTPREL16_HIGHEST:
10693 case R_PPC64_DTPREL16_HIGHESTA:
10694 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10695 break;
10696
10697 case R_PPC64_DTPMOD64:
10698 relocation = 1;
10699 addend = 0;
10700 goto dodyn;
10701
10702 case R_PPC64_TPREL64:
10703 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10704 goto dodyn;
10705
10706 case R_PPC64_DTPREL64:
10707 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10708 /* Fall thru */
10709
10710 /* Relocations that may need to be propagated if this is a
10711 dynamic object. */
10712 case R_PPC64_REL30:
10713 case R_PPC64_REL32:
10714 case R_PPC64_REL64:
10715 case R_PPC64_ADDR14:
10716 case R_PPC64_ADDR14_BRNTAKEN:
10717 case R_PPC64_ADDR14_BRTAKEN:
10718 case R_PPC64_ADDR16:
10719 case R_PPC64_ADDR16_DS:
10720 case R_PPC64_ADDR16_HA:
10721 case R_PPC64_ADDR16_HI:
10722 case R_PPC64_ADDR16_HIGHER:
10723 case R_PPC64_ADDR16_HIGHERA:
10724 case R_PPC64_ADDR16_HIGHEST:
10725 case R_PPC64_ADDR16_HIGHESTA:
10726 case R_PPC64_ADDR16_LO:
10727 case R_PPC64_ADDR16_LO_DS:
10728 case R_PPC64_ADDR24:
10729 case R_PPC64_ADDR32:
10730 case R_PPC64_ADDR64:
10731 case R_PPC64_UADDR16:
10732 case R_PPC64_UADDR32:
10733 case R_PPC64_UADDR64:
10734 /* r_symndx will be zero only for relocs against symbols
10735 from removed linkonce sections, or sections discarded by
10736 a linker script. */
10737 dodyn:
10738 if (r_symndx == 0)
10739 {
10740 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10741 contents + rel->r_offset);
10742 break;
10743 }
10744 /* Fall thru. */
10745
10746 dodyn2:
10747 if ((input_section->flags & SEC_ALLOC) == 0)
10748 break;
10749
10750 if (NO_OPD_RELOCS && is_opd)
10751 break;
10752
10753 if ((info->shared
10754 && (h == NULL
10755 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10756 || h->elf.root.type != bfd_link_hash_undefweak)
10757 && (MUST_BE_DYN_RELOC (r_type)
10758 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10759 || (ELIMINATE_COPY_RELOCS
10760 && !info->shared
10761 && h != NULL
10762 && h->elf.dynindx != -1
10763 && !h->elf.non_got_ref
10764 && h->elf.def_dynamic
10765 && !h->elf.def_regular))
10766 {
10767 Elf_Internal_Rela outrel;
10768 bfd_boolean skip, relocate;
10769 asection *sreloc;
10770 bfd_byte *loc;
10771 bfd_vma out_off;
10772
10773 /* When generating a dynamic object, these relocations
10774 are copied into the output file to be resolved at run
10775 time. */
10776
10777 skip = FALSE;
10778 relocate = FALSE;
10779
10780 out_off = _bfd_elf_section_offset (output_bfd, info,
10781 input_section, rel->r_offset);
10782 if (out_off == (bfd_vma) -1)
10783 skip = TRUE;
10784 else if (out_off == (bfd_vma) -2)
10785 skip = TRUE, relocate = TRUE;
10786 out_off += (input_section->output_section->vma
10787 + input_section->output_offset);
10788 outrel.r_offset = out_off;
10789 outrel.r_addend = rel->r_addend;
10790
10791 /* Optimize unaligned reloc use. */
10792 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10793 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10794 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10795 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10796 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10797 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10798 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10799 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10800 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10801
10802 if (skip)
10803 memset (&outrel, 0, sizeof outrel);
10804 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10805 && !is_opd
10806 && r_type != R_PPC64_TOC)
10807 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10808 else
10809 {
10810 /* This symbol is local, or marked to become local,
10811 or this is an opd section reloc which must point
10812 at a local function. */
10813 outrel.r_addend += relocation;
10814 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10815 {
10816 if (is_opd && h != NULL)
10817 {
10818 /* Lie about opd entries. This case occurs
10819 when building shared libraries and we
10820 reference a function in another shared
10821 lib. The same thing happens for a weak
10822 definition in an application that's
10823 overridden by a strong definition in a
10824 shared lib. (I believe this is a generic
10825 bug in binutils handling of weak syms.)
10826 In these cases we won't use the opd
10827 entry in this lib. */
10828 unresolved_reloc = FALSE;
10829 }
10830 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10831
10832 /* We need to relocate .opd contents for ld.so.
10833 Prelink also wants simple and consistent rules
10834 for relocs. This make all RELATIVE relocs have
10835 *r_offset equal to r_addend. */
10836 relocate = TRUE;
10837 }
10838 else
10839 {
10840 long indx = 0;
10841
10842 if (bfd_is_abs_section (sec))
10843 ;
10844 else if (sec == NULL || sec->owner == NULL)
10845 {
10846 bfd_set_error (bfd_error_bad_value);
10847 return FALSE;
10848 }
10849 else
10850 {
10851 asection *osec;
10852
10853 osec = sec->output_section;
10854 indx = elf_section_data (osec)->dynindx;
10855
10856 if (indx == 0)
10857 {
10858 if ((osec->flags & SEC_READONLY) == 0
10859 && htab->elf.data_index_section != NULL)
10860 osec = htab->elf.data_index_section;
10861 else
10862 osec = htab->elf.text_index_section;
10863 indx = elf_section_data (osec)->dynindx;
10864 }
10865 BFD_ASSERT (indx != 0);
10866
10867 /* We are turning this relocation into one
10868 against a section symbol, so subtract out
10869 the output section's address but not the
10870 offset of the input section in the output
10871 section. */
10872 outrel.r_addend -= osec->vma;
10873 }
10874
10875 outrel.r_info = ELF64_R_INFO (indx, r_type);
10876 }
10877 }
10878
10879 sreloc = elf_section_data (input_section)->sreloc;
10880 if (sreloc == NULL)
10881 abort ();
10882
10883 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
10884 >= sreloc->size)
10885 abort ();
10886 loc = sreloc->contents;
10887 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10888 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10889
10890 /* If this reloc is against an external symbol, it will
10891 be computed at runtime, so there's no need to do
10892 anything now. However, for the sake of prelink ensure
10893 that the section contents are a known value. */
10894 if (! relocate)
10895 {
10896 unresolved_reloc = FALSE;
10897 /* The value chosen here is quite arbitrary as ld.so
10898 ignores section contents except for the special
10899 case of .opd where the contents might be accessed
10900 before relocation. Choose zero, as that won't
10901 cause reloc overflow. */
10902 relocation = 0;
10903 addend = 0;
10904 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10905 to improve backward compatibility with older
10906 versions of ld. */
10907 if (r_type == R_PPC64_ADDR64)
10908 addend = outrel.r_addend;
10909 /* Adjust pc_relative relocs to have zero in *r_offset. */
10910 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10911 addend = (input_section->output_section->vma
10912 + input_section->output_offset
10913 + rel->r_offset);
10914 }
10915 }
10916 break;
10917
10918 case R_PPC64_COPY:
10919 case R_PPC64_GLOB_DAT:
10920 case R_PPC64_JMP_SLOT:
10921 case R_PPC64_RELATIVE:
10922 /* We shouldn't ever see these dynamic relocs in relocatable
10923 files. */
10924 /* Fall through. */
10925
10926 case R_PPC64_PLTGOT16:
10927 case R_PPC64_PLTGOT16_DS:
10928 case R_PPC64_PLTGOT16_HA:
10929 case R_PPC64_PLTGOT16_HI:
10930 case R_PPC64_PLTGOT16_LO:
10931 case R_PPC64_PLTGOT16_LO_DS:
10932 case R_PPC64_PLTREL32:
10933 case R_PPC64_PLTREL64:
10934 /* These ones haven't been implemented yet. */
10935
10936 (*_bfd_error_handler)
10937 (_("%B: relocation %s is not supported for symbol %s."),
10938 input_bfd,
10939 ppc64_elf_howto_table[r_type]->name, sym_name);
10940
10941 bfd_set_error (bfd_error_invalid_operation);
10942 ret = FALSE;
10943 continue;
10944 }
10945
10946 /* Do any further special processing. */
10947 switch (r_type)
10948 {
10949 default:
10950 break;
10951
10952 case R_PPC64_ADDR16_HA:
10953 case R_PPC64_ADDR16_HIGHERA:
10954 case R_PPC64_ADDR16_HIGHESTA:
10955 case R_PPC64_TOC16_HA:
10956 case R_PPC64_SECTOFF_HA:
10957 case R_PPC64_TPREL16_HA:
10958 case R_PPC64_DTPREL16_HA:
10959 case R_PPC64_TPREL16_HIGHER:
10960 case R_PPC64_TPREL16_HIGHERA:
10961 case R_PPC64_TPREL16_HIGHEST:
10962 case R_PPC64_TPREL16_HIGHESTA:
10963 case R_PPC64_DTPREL16_HIGHER:
10964 case R_PPC64_DTPREL16_HIGHERA:
10965 case R_PPC64_DTPREL16_HIGHEST:
10966 case R_PPC64_DTPREL16_HIGHESTA:
10967 /* It's just possible that this symbol is a weak symbol
10968 that's not actually defined anywhere. In that case,
10969 'sec' would be NULL, and we should leave the symbol
10970 alone (it will be set to zero elsewhere in the link). */
10971 if (sec == NULL)
10972 break;
10973 /* Fall thru */
10974
10975 case R_PPC64_GOT16_HA:
10976 case R_PPC64_PLTGOT16_HA:
10977 case R_PPC64_PLT16_HA:
10978 case R_PPC64_GOT_TLSGD16_HA:
10979 case R_PPC64_GOT_TLSLD16_HA:
10980 case R_PPC64_GOT_TPREL16_HA:
10981 case R_PPC64_GOT_DTPREL16_HA:
10982 /* Add 0x10000 if sign bit in 0:15 is set.
10983 Bits 0:15 are not used. */
10984 addend += 0x8000;
10985 break;
10986
10987 case R_PPC64_ADDR16_DS:
10988 case R_PPC64_ADDR16_LO_DS:
10989 case R_PPC64_GOT16_DS:
10990 case R_PPC64_GOT16_LO_DS:
10991 case R_PPC64_PLT16_LO_DS:
10992 case R_PPC64_SECTOFF_DS:
10993 case R_PPC64_SECTOFF_LO_DS:
10994 case R_PPC64_TOC16_DS:
10995 case R_PPC64_TOC16_LO_DS:
10996 case R_PPC64_PLTGOT16_DS:
10997 case R_PPC64_PLTGOT16_LO_DS:
10998 case R_PPC64_GOT_TPREL16_DS:
10999 case R_PPC64_GOT_TPREL16_LO_DS:
11000 case R_PPC64_GOT_DTPREL16_DS:
11001 case R_PPC64_GOT_DTPREL16_LO_DS:
11002 case R_PPC64_TPREL16_DS:
11003 case R_PPC64_TPREL16_LO_DS:
11004 case R_PPC64_DTPREL16_DS:
11005 case R_PPC64_DTPREL16_LO_DS:
11006 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11007 mask = 3;
11008 /* If this reloc is against an lq insn, then the value must be
11009 a multiple of 16. This is somewhat of a hack, but the
11010 "correct" way to do this by defining _DQ forms of all the
11011 _DS relocs bloats all reloc switches in this file. It
11012 doesn't seem to make much sense to use any of these relocs
11013 in data, so testing the insn should be safe. */
11014 if ((insn & (0x3f << 26)) == (56u << 26))
11015 mask = 15;
11016 if (((relocation + addend) & mask) != 0)
11017 {
11018 (*_bfd_error_handler)
11019 (_("%B: error: relocation %s not a multiple of %d"),
11020 input_bfd,
11021 ppc64_elf_howto_table[r_type]->name,
11022 mask + 1);
11023 bfd_set_error (bfd_error_bad_value);
11024 ret = FALSE;
11025 continue;
11026 }
11027 break;
11028 }
11029
11030 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11031 because such sections are not SEC_ALLOC and thus ld.so will
11032 not process them. */
11033 if (unresolved_reloc
11034 && !((input_section->flags & SEC_DEBUGGING) != 0
11035 && h->elf.def_dynamic))
11036 {
11037 (*_bfd_error_handler)
11038 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11039 input_bfd,
11040 input_section,
11041 (long) rel->r_offset,
11042 ppc64_elf_howto_table[(int) r_type]->name,
11043 h->elf.root.root.string);
11044 ret = FALSE;
11045 }
11046
11047 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11048 input_bfd,
11049 input_section,
11050 contents,
11051 rel->r_offset,
11052 relocation,
11053 addend);
11054
11055 if (r != bfd_reloc_ok)
11056 {
11057 if (sym_name == NULL)
11058 sym_name = "(null)";
11059 if (r == bfd_reloc_overflow)
11060 {
11061 if (warned)
11062 continue;
11063 if (h != NULL
11064 && h->elf.root.type == bfd_link_hash_undefweak
11065 && ppc64_elf_howto_table[r_type]->pc_relative)
11066 {
11067 /* Assume this is a call protected by other code that
11068 detects the symbol is undefined. If this is the case,
11069 we can safely ignore the overflow. If not, the
11070 program is hosed anyway, and a little warning isn't
11071 going to help. */
11072
11073 continue;
11074 }
11075
11076 if (!((*info->callbacks->reloc_overflow)
11077 (info, (h ? &h->elf.root : NULL), sym_name,
11078 ppc64_elf_howto_table[r_type]->name,
11079 orig_addend, input_bfd, input_section, rel->r_offset)))
11080 return FALSE;
11081 }
11082 else
11083 {
11084 (*_bfd_error_handler)
11085 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11086 input_bfd,
11087 input_section,
11088 (long) rel->r_offset,
11089 ppc64_elf_howto_table[r_type]->name,
11090 sym_name,
11091 (int) r);
11092 ret = FALSE;
11093 }
11094 }
11095 }
11096
11097 /* If we're emitting relocations, then shortly after this function
11098 returns, reloc offsets and addends for this section will be
11099 adjusted. Worse, reloc symbol indices will be for the output
11100 file rather than the input. Save a copy of the relocs for
11101 opd_entry_value. */
11102 if (is_opd && (info->emitrelocations || info->relocatable))
11103 {
11104 bfd_size_type amt;
11105 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11106 rel = bfd_alloc (input_bfd, amt);
11107 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11108 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11109 if (rel == NULL)
11110 return FALSE;
11111 memcpy (rel, relocs, amt);
11112 }
11113 return ret;
11114 }
11115
11116 /* Adjust the value of any local symbols in opd sections. */
11117
11118 static bfd_boolean
11119 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11120 const char *name ATTRIBUTE_UNUSED,
11121 Elf_Internal_Sym *elfsym,
11122 asection *input_sec,
11123 struct elf_link_hash_entry *h)
11124 {
11125 long *opd_adjust, adjust;
11126 bfd_vma value;
11127
11128 if (h != NULL)
11129 return TRUE;
11130
11131 opd_adjust = get_opd_info (input_sec);
11132 if (opd_adjust == NULL)
11133 return TRUE;
11134
11135 value = elfsym->st_value - input_sec->output_offset;
11136 if (!info->relocatable)
11137 value -= input_sec->output_section->vma;
11138
11139 adjust = opd_adjust[value / 8];
11140 if (adjust == -1)
11141 elfsym->st_value = 0;
11142 else
11143 elfsym->st_value += adjust;
11144 return TRUE;
11145 }
11146
11147 /* Finish up dynamic symbol handling. We set the contents of various
11148 dynamic sections here. */
11149
11150 static bfd_boolean
11151 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11152 struct bfd_link_info *info,
11153 struct elf_link_hash_entry *h,
11154 Elf_Internal_Sym *sym)
11155 {
11156 struct ppc_link_hash_table *htab;
11157 struct plt_entry *ent;
11158 Elf_Internal_Rela rela;
11159 bfd_byte *loc;
11160
11161 htab = ppc_hash_table (info);
11162
11163 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11164 if (ent->plt.offset != (bfd_vma) -1)
11165 {
11166 /* This symbol has an entry in the procedure linkage
11167 table. Set it up. */
11168
11169 if (htab->plt == NULL
11170 || htab->relplt == NULL
11171 || htab->glink == NULL)
11172 abort ();
11173
11174 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11175 fill in the PLT entry. */
11176 rela.r_offset = (htab->plt->output_section->vma
11177 + htab->plt->output_offset
11178 + ent->plt.offset);
11179 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11180 rela.r_addend = ent->addend;
11181
11182 loc = htab->relplt->contents;
11183 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11184 * sizeof (Elf64_External_Rela));
11185 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11186 }
11187
11188 if (h->needs_copy)
11189 {
11190 Elf_Internal_Rela rela;
11191 bfd_byte *loc;
11192
11193 /* This symbol needs a copy reloc. Set it up. */
11194
11195 if (h->dynindx == -1
11196 || (h->root.type != bfd_link_hash_defined
11197 && h->root.type != bfd_link_hash_defweak)
11198 || htab->relbss == NULL)
11199 abort ();
11200
11201 rela.r_offset = (h->root.u.def.value
11202 + h->root.u.def.section->output_section->vma
11203 + h->root.u.def.section->output_offset);
11204 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11205 rela.r_addend = 0;
11206 loc = htab->relbss->contents;
11207 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11208 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11209 }
11210
11211 /* Mark some specially defined symbols as absolute. */
11212 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11213 sym->st_shndx = SHN_ABS;
11214
11215 return TRUE;
11216 }
11217
11218 /* Used to decide how to sort relocs in an optimal manner for the
11219 dynamic linker, before writing them out. */
11220
11221 static enum elf_reloc_type_class
11222 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11223 {
11224 enum elf_ppc64_reloc_type r_type;
11225
11226 r_type = ELF64_R_TYPE (rela->r_info);
11227 switch (r_type)
11228 {
11229 case R_PPC64_RELATIVE:
11230 return reloc_class_relative;
11231 case R_PPC64_JMP_SLOT:
11232 return reloc_class_plt;
11233 case R_PPC64_COPY:
11234 return reloc_class_copy;
11235 default:
11236 return reloc_class_normal;
11237 }
11238 }
11239
11240 /* Finish up the dynamic sections. */
11241
11242 static bfd_boolean
11243 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11244 struct bfd_link_info *info)
11245 {
11246 struct ppc_link_hash_table *htab;
11247 bfd *dynobj;
11248 asection *sdyn;
11249
11250 htab = ppc_hash_table (info);
11251 dynobj = htab->elf.dynobj;
11252 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11253
11254 if (htab->elf.dynamic_sections_created)
11255 {
11256 Elf64_External_Dyn *dyncon, *dynconend;
11257
11258 if (sdyn == NULL || htab->got == NULL)
11259 abort ();
11260
11261 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11262 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11263 for (; dyncon < dynconend; dyncon++)
11264 {
11265 Elf_Internal_Dyn dyn;
11266 asection *s;
11267
11268 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11269
11270 switch (dyn.d_tag)
11271 {
11272 default:
11273 continue;
11274
11275 case DT_PPC64_GLINK:
11276 s = htab->glink;
11277 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11278 /* We stupidly defined DT_PPC64_GLINK to be the start
11279 of glink rather than the first entry point, which is
11280 what ld.so needs, and now have a bigger stub to
11281 support automatic multiple TOCs. */
11282 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11283 break;
11284
11285 case DT_PPC64_OPD:
11286 s = bfd_get_section_by_name (output_bfd, ".opd");
11287 if (s == NULL)
11288 continue;
11289 dyn.d_un.d_ptr = s->vma;
11290 break;
11291
11292 case DT_PPC64_OPDSZ:
11293 s = bfd_get_section_by_name (output_bfd, ".opd");
11294 if (s == NULL)
11295 continue;
11296 dyn.d_un.d_val = s->size;
11297 break;
11298
11299 case DT_PLTGOT:
11300 s = htab->plt;
11301 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11302 break;
11303
11304 case DT_JMPREL:
11305 s = htab->relplt;
11306 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11307 break;
11308
11309 case DT_PLTRELSZ:
11310 dyn.d_un.d_val = htab->relplt->size;
11311 break;
11312
11313 case DT_RELASZ:
11314 /* Don't count procedure linkage table relocs in the
11315 overall reloc count. */
11316 s = htab->relplt;
11317 if (s == NULL)
11318 continue;
11319 dyn.d_un.d_val -= s->size;
11320 break;
11321
11322 case DT_RELA:
11323 /* We may not be using the standard ELF linker script.
11324 If .rela.plt is the first .rela section, we adjust
11325 DT_RELA to not include it. */
11326 s = htab->relplt;
11327 if (s == NULL)
11328 continue;
11329 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11330 continue;
11331 dyn.d_un.d_ptr += s->size;
11332 break;
11333 }
11334
11335 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11336 }
11337 }
11338
11339 if (htab->got != NULL && htab->got->size != 0)
11340 {
11341 /* Fill in the first entry in the global offset table.
11342 We use it to hold the link-time TOCbase. */
11343 bfd_put_64 (output_bfd,
11344 elf_gp (output_bfd) + TOC_BASE_OFF,
11345 htab->got->contents);
11346
11347 /* Set .got entry size. */
11348 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11349 }
11350
11351 if (htab->plt != NULL && htab->plt->size != 0)
11352 {
11353 /* Set .plt entry size. */
11354 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11355 = PLT_ENTRY_SIZE;
11356 }
11357
11358 /* We need to handle writing out multiple GOT sections ourselves,
11359 since we didn't add them to DYNOBJ. We know dynobj is the first
11360 bfd. */
11361 while ((dynobj = dynobj->link_next) != NULL)
11362 {
11363 asection *s;
11364
11365 if (!is_ppc64_elf_target (dynobj->xvec))
11366 continue;
11367
11368 s = ppc64_elf_tdata (dynobj)->got;
11369 if (s != NULL
11370 && s->size != 0
11371 && s->output_section != bfd_abs_section_ptr
11372 && !bfd_set_section_contents (output_bfd, s->output_section,
11373 s->contents, s->output_offset,
11374 s->size))
11375 return FALSE;
11376 s = ppc64_elf_tdata (dynobj)->relgot;
11377 if (s != NULL
11378 && s->size != 0
11379 && s->output_section != bfd_abs_section_ptr
11380 && !bfd_set_section_contents (output_bfd, s->output_section,
11381 s->contents, s->output_offset,
11382 s->size))
11383 return FALSE;
11384 }
11385
11386 return TRUE;
11387 }
11388
11389 #include "elf64-target.h"
GDB Binutils - Deliverables
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