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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_check_directives
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115
116 /* The name of the dynamic interpreter. This is put in the .interp
117 section. */
118 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
119
120 /* The size in bytes of an entry in the procedure linkage table. */
121 #define PLT_ENTRY_SIZE 24
122
123 /* The initial size of the plt reserved for the dynamic linker. */
124 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
125
126 /* TOC base pointers offset from start of TOC. */
127 #define TOC_BASE_OFF 0x8000
128
129 /* Offset of tp and dtp pointers from start of TLS block. */
130 #define TP_OFFSET 0x7000
131 #define DTP_OFFSET 0x8000
132
133 /* .plt call stub instructions. The normal stub is like this, but
134 sometimes the .plt entry crosses a 64k boundary and we need to
135 insert an addi to adjust r12. */
136 #define PLT_CALL_STUB_SIZE (7*4)
137 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
138 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
139 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
140 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
141 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
142 /* ld %r11,xxx+16@l(%r12) */
143 #define BCTR 0x4e800420 /* bctr */
144
145
146 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
147 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
148 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
149 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
150
151 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
152 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
153
154 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
155
156 /* glink call stub instructions. We enter with the index in R0. */
157 #define GLINK_CALL_STUB_SIZE (16*4)
158 /* 0: */
159 /* .quad plt0-1f */
160 /* __glink: */
161 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
162 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
163 /* 1: */
164 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
165 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
166 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
167 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
168 /* ld %11,0(%12) */
169 /* ld %2,8(%12) */
170 /* mtctr %11 */
171 /* ld %11,16(%12) */
172 /* bctr */
173
174 /* Pad with this. */
175 #define NOP 0x60000000
176
177 /* Some other nops. */
178 #define CROR_151515 0x4def7b82
179 #define CROR_313131 0x4ffffb82
180
181 /* .glink entries for the first 32k functions are two instructions. */
182 #define LI_R0_0 0x38000000 /* li %r0,0 */
183 #define B_DOT 0x48000000 /* b . */
184
185 /* After that, we need two instructions to load the index, followed by
186 a branch. */
187 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
188 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
189
190 /* Instructions used by the save and restore reg functions. */
191 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
192 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
193 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
194 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
195 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
196 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
197 #define LI_R12_0 0x39800000 /* li %r12,0 */
198 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
199 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
200 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
201 #define BLR 0x4e800020 /* blr */
202
203 /* Since .opd is an array of descriptors and each entry will end up
204 with identical R_PPC64_RELATIVE relocs, there is really no need to
205 propagate .opd relocs; The dynamic linker should be taught to
206 relocate .opd without reloc entries. */
207 #ifndef NO_OPD_RELOCS
208 #define NO_OPD_RELOCS 0
209 #endif
210 \f
211 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
212
213 /* Relocation HOWTO's. */
214 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
215
216 static reloc_howto_type ppc64_elf_howto_raw[] = {
217 /* This reloc does nothing. */
218 HOWTO (R_PPC64_NONE, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 32, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_dont, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC64_NONE", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 32 bit relocation. */
233 HOWTO (R_PPC64_ADDR32, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 32, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC64_ADDR32", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffffffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* An absolute 26 bit branch; the lower two bits must be zero.
248 FIXME: we don't check that, we just clear them. */
249 HOWTO (R_PPC64_ADDR24, /* type */
250 0, /* rightshift */
251 2, /* size (0 = byte, 1 = short, 2 = long) */
252 26, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_bitfield, /* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC64_ADDR24", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0x03fffffc, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* A standard 16 bit relocation. */
264 HOWTO (R_PPC64_ADDR16, /* type */
265 0, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_bitfield, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC64_ADDR16", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* A 16 bit relocation without overflow. */
279 HOWTO (R_PPC64_ADDR16_LO, /* type */
280 0, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont,/* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_PPC64_ADDR16_LO", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* Bits 16-31 of an address. */
294 HOWTO (R_PPC64_ADDR16_HI, /* type */
295 16, /* rightshift */
296 1, /* size (0 = byte, 1 = short, 2 = long) */
297 16, /* bitsize */
298 FALSE, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_dont, /* complain_on_overflow */
301 bfd_elf_generic_reloc, /* special_function */
302 "R_PPC64_ADDR16_HI", /* name */
303 FALSE, /* partial_inplace */
304 0, /* src_mask */
305 0xffff, /* dst_mask */
306 FALSE), /* pcrel_offset */
307
308 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
309 bits, treated as a signed number, is negative. */
310 HOWTO (R_PPC64_ADDR16_HA, /* type */
311 16, /* rightshift */
312 1, /* size (0 = byte, 1 = short, 2 = long) */
313 16, /* bitsize */
314 FALSE, /* pc_relative */
315 0, /* bitpos */
316 complain_overflow_dont, /* complain_on_overflow */
317 ppc64_elf_ha_reloc, /* special_function */
318 "R_PPC64_ADDR16_HA", /* name */
319 FALSE, /* partial_inplace */
320 0, /* src_mask */
321 0xffff, /* dst_mask */
322 FALSE), /* pcrel_offset */
323
324 /* An absolute 16 bit branch; the lower two bits must be zero.
325 FIXME: we don't check that, we just clear them. */
326 HOWTO (R_PPC64_ADDR14, /* type */
327 0, /* rightshift */
328 2, /* size (0 = byte, 1 = short, 2 = long) */
329 16, /* bitsize */
330 FALSE, /* pc_relative */
331 0, /* bitpos */
332 complain_overflow_bitfield, /* complain_on_overflow */
333 ppc64_elf_branch_reloc, /* special_function */
334 "R_PPC64_ADDR14", /* name */
335 FALSE, /* partial_inplace */
336 0, /* src_mask */
337 0x0000fffc, /* dst_mask */
338 FALSE), /* pcrel_offset */
339
340 /* An absolute 16 bit branch, for which bit 10 should be set to
341 indicate that the branch is expected to be taken. The lower two
342 bits must be zero. */
343 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 16, /* bitsize */
347 FALSE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_bitfield, /* complain_on_overflow */
350 ppc64_elf_brtaken_reloc, /* special_function */
351 "R_PPC64_ADDR14_BRTAKEN",/* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0x0000fffc, /* dst_mask */
355 FALSE), /* pcrel_offset */
356
357 /* An absolute 16 bit branch, for which bit 10 should be set to
358 indicate that the branch is not expected to be taken. The lower
359 two bits must be zero. */
360 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 FALSE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_bitfield, /* complain_on_overflow */
367 ppc64_elf_brtaken_reloc, /* special_function */
368 "R_PPC64_ADDR14_BRNTAKEN",/* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x0000fffc, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* A relative 26 bit branch; the lower two bits must be zero. */
375 HOWTO (R_PPC64_REL24, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 26, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_signed, /* complain_on_overflow */
382 ppc64_elf_branch_reloc, /* special_function */
383 "R_PPC64_REL24", /* name */
384 FALSE, /* partial_inplace */
385 0, /* src_mask */
386 0x03fffffc, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 /* A relative 16 bit branch; the lower two bits must be zero. */
390 HOWTO (R_PPC64_REL14, /* type */
391 0, /* rightshift */
392 2, /* size (0 = byte, 1 = short, 2 = long) */
393 16, /* bitsize */
394 TRUE, /* pc_relative */
395 0, /* bitpos */
396 complain_overflow_signed, /* complain_on_overflow */
397 ppc64_elf_branch_reloc, /* special_function */
398 "R_PPC64_REL14", /* name */
399 FALSE, /* partial_inplace */
400 0, /* src_mask */
401 0x0000fffc, /* dst_mask */
402 TRUE), /* pcrel_offset */
403
404 /* A relative 16 bit branch. Bit 10 should be set to indicate that
405 the branch is expected to be taken. The lower two bits must be
406 zero. */
407 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
408 0, /* rightshift */
409 2, /* size (0 = byte, 1 = short, 2 = long) */
410 16, /* bitsize */
411 TRUE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_signed, /* complain_on_overflow */
414 ppc64_elf_brtaken_reloc, /* special_function */
415 "R_PPC64_REL14_BRTAKEN", /* name */
416 FALSE, /* partial_inplace */
417 0, /* src_mask */
418 0x0000fffc, /* dst_mask */
419 TRUE), /* pcrel_offset */
420
421 /* A relative 16 bit branch. Bit 10 should be set to indicate that
422 the branch is not expected to be taken. The lower two bits must
423 be zero. */
424 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
425 0, /* rightshift */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
427 16, /* bitsize */
428 TRUE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_signed, /* complain_on_overflow */
431 ppc64_elf_brtaken_reloc, /* special_function */
432 "R_PPC64_REL14_BRNTAKEN",/* name */
433 FALSE, /* partial_inplace */
434 0, /* src_mask */
435 0x0000fffc, /* dst_mask */
436 TRUE), /* pcrel_offset */
437
438 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
439 symbol. */
440 HOWTO (R_PPC64_GOT16, /* type */
441 0, /* rightshift */
442 1, /* size (0 = byte, 1 = short, 2 = long) */
443 16, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_signed, /* complain_on_overflow */
447 ppc64_elf_unhandled_reloc, /* special_function */
448 "R_PPC64_GOT16", /* name */
449 FALSE, /* partial_inplace */
450 0, /* src_mask */
451 0xffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
455 the symbol. */
456 HOWTO (R_PPC64_GOT16_LO, /* type */
457 0, /* rightshift */
458 1, /* size (0 = byte, 1 = short, 2 = long) */
459 16, /* bitsize */
460 FALSE, /* pc_relative */
461 0, /* bitpos */
462 complain_overflow_dont, /* complain_on_overflow */
463 ppc64_elf_unhandled_reloc, /* special_function */
464 "R_PPC64_GOT16_LO", /* name */
465 FALSE, /* partial_inplace */
466 0, /* src_mask */
467 0xffff, /* dst_mask */
468 FALSE), /* pcrel_offset */
469
470 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
471 the symbol. */
472 HOWTO (R_PPC64_GOT16_HI, /* type */
473 16, /* rightshift */
474 1, /* size (0 = byte, 1 = short, 2 = long) */
475 16, /* bitsize */
476 FALSE, /* pc_relative */
477 0, /* bitpos */
478 complain_overflow_dont,/* complain_on_overflow */
479 ppc64_elf_unhandled_reloc, /* special_function */
480 "R_PPC64_GOT16_HI", /* name */
481 FALSE, /* partial_inplace */
482 0, /* src_mask */
483 0xffff, /* dst_mask */
484 FALSE), /* pcrel_offset */
485
486 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
487 the symbol. */
488 HOWTO (R_PPC64_GOT16_HA, /* type */
489 16, /* rightshift */
490 1, /* size (0 = byte, 1 = short, 2 = long) */
491 16, /* bitsize */
492 FALSE, /* pc_relative */
493 0, /* bitpos */
494 complain_overflow_dont,/* complain_on_overflow */
495 ppc64_elf_unhandled_reloc, /* special_function */
496 "R_PPC64_GOT16_HA", /* name */
497 FALSE, /* partial_inplace */
498 0, /* src_mask */
499 0xffff, /* dst_mask */
500 FALSE), /* pcrel_offset */
501
502 /* This is used only by the dynamic linker. The symbol should exist
503 both in the object being run and in some shared library. The
504 dynamic linker copies the data addressed by the symbol from the
505 shared library into the object, because the object being
506 run has to have the data at some particular address. */
507 HOWTO (R_PPC64_COPY, /* type */
508 0, /* rightshift */
509 0, /* this one is variable size */
510 0, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_COPY", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR64, but used when setting global offset table
522 entries. */
523 HOWTO (R_PPC64_GLOB_DAT, /* type */
524 0, /* rightshift */
525 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
526 64, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GLOB_DAT", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 ONES (64), /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Created by the link editor. Marks a procedure linkage table
538 entry for a symbol. */
539 HOWTO (R_PPC64_JMP_SLOT, /* type */
540 0, /* rightshift */
541 0, /* size (0 = byte, 1 = short, 2 = long) */
542 0, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_JMP_SLOT", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Used only by the dynamic linker. When the object is run, this
554 doubleword64 is set to the load address of the object, plus the
555 addend. */
556 HOWTO (R_PPC64_RELATIVE, /* type */
557 0, /* rightshift */
558 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
559 64, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_dont, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC64_RELATIVE", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 ONES (64), /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* Like R_PPC64_ADDR32, but may be unaligned. */
571 HOWTO (R_PPC64_UADDR32, /* type */
572 0, /* rightshift */
573 2, /* size (0 = byte, 1 = short, 2 = long) */
574 32, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC64_UADDR32", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffffffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* Like R_PPC64_ADDR16, but may be unaligned. */
586 HOWTO (R_PPC64_UADDR16, /* type */
587 0, /* rightshift */
588 1, /* size (0 = byte, 1 = short, 2 = long) */
589 16, /* bitsize */
590 FALSE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC64_UADDR16", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffff, /* dst_mask */
598 FALSE), /* pcrel_offset */
599
600 /* 32-bit PC relative. */
601 HOWTO (R_PPC64_REL32, /* type */
602 0, /* rightshift */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
604 32, /* bitsize */
605 TRUE, /* pc_relative */
606 0, /* bitpos */
607 /* FIXME: Verify. Was complain_overflow_bitfield. */
608 complain_overflow_signed, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC64_REL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* 32-bit relocation to the symbol's procedure linkage table. */
617 HOWTO (R_PPC64_PLT32, /* type */
618 0, /* rightshift */
619 2, /* size (0 = byte, 1 = short, 2 = long) */
620 32, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_bitfield, /* complain_on_overflow */
624 ppc64_elf_unhandled_reloc, /* special_function */
625 "R_PPC64_PLT32", /* name */
626 FALSE, /* partial_inplace */
627 0, /* src_mask */
628 0xffffffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
630
631 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
632 FIXME: R_PPC64_PLTREL32 not supported. */
633 HOWTO (R_PPC64_PLTREL32, /* type */
634 0, /* rightshift */
635 2, /* size (0 = byte, 1 = short, 2 = long) */
636 32, /* bitsize */
637 TRUE, /* pc_relative */
638 0, /* bitpos */
639 complain_overflow_signed, /* complain_on_overflow */
640 bfd_elf_generic_reloc, /* special_function */
641 "R_PPC64_PLTREL32", /* name */
642 FALSE, /* partial_inplace */
643 0, /* src_mask */
644 0xffffffff, /* dst_mask */
645 TRUE), /* pcrel_offset */
646
647 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
648 the symbol. */
649 HOWTO (R_PPC64_PLT16_LO, /* type */
650 0, /* rightshift */
651 1, /* size (0 = byte, 1 = short, 2 = long) */
652 16, /* bitsize */
653 FALSE, /* pc_relative */
654 0, /* bitpos */
655 complain_overflow_dont, /* complain_on_overflow */
656 ppc64_elf_unhandled_reloc, /* special_function */
657 "R_PPC64_PLT16_LO", /* name */
658 FALSE, /* partial_inplace */
659 0, /* src_mask */
660 0xffff, /* dst_mask */
661 FALSE), /* pcrel_offset */
662
663 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
664 the symbol. */
665 HOWTO (R_PPC64_PLT16_HI, /* type */
666 16, /* rightshift */
667 1, /* size (0 = byte, 1 = short, 2 = long) */
668 16, /* bitsize */
669 FALSE, /* pc_relative */
670 0, /* bitpos */
671 complain_overflow_dont, /* complain_on_overflow */
672 ppc64_elf_unhandled_reloc, /* special_function */
673 "R_PPC64_PLT16_HI", /* name */
674 FALSE, /* partial_inplace */
675 0, /* src_mask */
676 0xffff, /* dst_mask */
677 FALSE), /* pcrel_offset */
678
679 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
680 the symbol. */
681 HOWTO (R_PPC64_PLT16_HA, /* type */
682 16, /* rightshift */
683 1, /* size (0 = byte, 1 = short, 2 = long) */
684 16, /* bitsize */
685 FALSE, /* pc_relative */
686 0, /* bitpos */
687 complain_overflow_dont, /* complain_on_overflow */
688 ppc64_elf_unhandled_reloc, /* special_function */
689 "R_PPC64_PLT16_HA", /* name */
690 FALSE, /* partial_inplace */
691 0, /* src_mask */
692 0xffff, /* dst_mask */
693 FALSE), /* pcrel_offset */
694
695 /* 16-bit section relative relocation. */
696 HOWTO (R_PPC64_SECTOFF, /* type */
697 0, /* rightshift */
698 1, /* size (0 = byte, 1 = short, 2 = long) */
699 16, /* bitsize */
700 FALSE, /* pc_relative */
701 0, /* bitpos */
702 complain_overflow_bitfield, /* complain_on_overflow */
703 ppc64_elf_sectoff_reloc, /* special_function */
704 "R_PPC64_SECTOFF", /* name */
705 FALSE, /* partial_inplace */
706 0, /* src_mask */
707 0xffff, /* dst_mask */
708 FALSE), /* pcrel_offset */
709
710 /* Like R_PPC64_SECTOFF, but no overflow warning. */
711 HOWTO (R_PPC64_SECTOFF_LO, /* type */
712 0, /* rightshift */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
714 16, /* bitsize */
715 FALSE, /* pc_relative */
716 0, /* bitpos */
717 complain_overflow_dont, /* complain_on_overflow */
718 ppc64_elf_sectoff_reloc, /* special_function */
719 "R_PPC64_SECTOFF_LO", /* name */
720 FALSE, /* partial_inplace */
721 0, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE), /* pcrel_offset */
724
725 /* 16-bit upper half section relative relocation. */
726 HOWTO (R_PPC64_SECTOFF_HI, /* type */
727 16, /* rightshift */
728 1, /* size (0 = byte, 1 = short, 2 = long) */
729 16, /* bitsize */
730 FALSE, /* pc_relative */
731 0, /* bitpos */
732 complain_overflow_dont, /* complain_on_overflow */
733 ppc64_elf_sectoff_reloc, /* special_function */
734 "R_PPC64_SECTOFF_HI", /* name */
735 FALSE, /* partial_inplace */
736 0, /* src_mask */
737 0xffff, /* dst_mask */
738 FALSE), /* pcrel_offset */
739
740 /* 16-bit upper half adjusted section relative relocation. */
741 HOWTO (R_PPC64_SECTOFF_HA, /* type */
742 16, /* rightshift */
743 1, /* size (0 = byte, 1 = short, 2 = long) */
744 16, /* bitsize */
745 FALSE, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_dont, /* complain_on_overflow */
748 ppc64_elf_sectoff_ha_reloc, /* special_function */
749 "R_PPC64_SECTOFF_HA", /* name */
750 FALSE, /* partial_inplace */
751 0, /* src_mask */
752 0xffff, /* dst_mask */
753 FALSE), /* pcrel_offset */
754
755 /* Like R_PPC64_REL24 without touching the two least significant bits. */
756 HOWTO (R_PPC64_REL30, /* type */
757 2, /* rightshift */
758 2, /* size (0 = byte, 1 = short, 2 = long) */
759 30, /* bitsize */
760 TRUE, /* pc_relative */
761 0, /* bitpos */
762 complain_overflow_dont, /* complain_on_overflow */
763 bfd_elf_generic_reloc, /* special_function */
764 "R_PPC64_REL30", /* name */
765 FALSE, /* partial_inplace */
766 0, /* src_mask */
767 0xfffffffc, /* dst_mask */
768 TRUE), /* pcrel_offset */
769
770 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
771
772 /* A standard 64-bit relocation. */
773 HOWTO (R_PPC64_ADDR64, /* type */
774 0, /* rightshift */
775 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
776 64, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_PPC64_ADDR64", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 ONES (64), /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 /* The bits 32-47 of an address. */
788 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
789 32, /* rightshift */
790 1, /* size (0 = byte, 1 = short, 2 = long) */
791 16, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC64_ADDR16_HIGHER", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0xffff, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 /* The bits 32-47 of an address, plus 1 if the contents of the low
803 16 bits, treated as a signed number, is negative. */
804 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
805 32, /* rightshift */
806 1, /* size (0 = byte, 1 = short, 2 = long) */
807 16, /* bitsize */
808 FALSE, /* pc_relative */
809 0, /* bitpos */
810 complain_overflow_dont, /* complain_on_overflow */
811 ppc64_elf_ha_reloc, /* special_function */
812 "R_PPC64_ADDR16_HIGHERA", /* name */
813 FALSE, /* partial_inplace */
814 0, /* src_mask */
815 0xffff, /* dst_mask */
816 FALSE), /* pcrel_offset */
817
818 /* The bits 48-63 of an address. */
819 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
820 48, /* rightshift */
821 1, /* size (0 = byte, 1 = short, 2 = long) */
822 16, /* bitsize */
823 FALSE, /* pc_relative */
824 0, /* bitpos */
825 complain_overflow_dont, /* complain_on_overflow */
826 bfd_elf_generic_reloc, /* special_function */
827 "R_PPC64_ADDR16_HIGHEST", /* name */
828 FALSE, /* partial_inplace */
829 0, /* src_mask */
830 0xffff, /* dst_mask */
831 FALSE), /* pcrel_offset */
832
833 /* The bits 48-63 of an address, plus 1 if the contents of the low
834 16 bits, treated as a signed number, is negative. */
835 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
836 48, /* rightshift */
837 1, /* size (0 = byte, 1 = short, 2 = long) */
838 16, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc64_elf_ha_reloc, /* special_function */
843 "R_PPC64_ADDR16_HIGHESTA", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* Like ADDR64, but may be unaligned. */
850 HOWTO (R_PPC64_UADDR64, /* type */
851 0, /* rightshift */
852 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
853 64, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_dont, /* complain_on_overflow */
857 bfd_elf_generic_reloc, /* special_function */
858 "R_PPC64_UADDR64", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 ONES (64), /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* 64-bit relative relocation. */
865 HOWTO (R_PPC64_REL64, /* type */
866 0, /* rightshift */
867 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
868 64, /* bitsize */
869 TRUE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 bfd_elf_generic_reloc, /* special_function */
873 "R_PPC64_REL64", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 ONES (64), /* dst_mask */
877 TRUE), /* pcrel_offset */
878
879 /* 64-bit relocation to the symbol's procedure linkage table. */
880 HOWTO (R_PPC64_PLT64, /* type */
881 0, /* rightshift */
882 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
883 64, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc64_elf_unhandled_reloc, /* special_function */
888 "R_PPC64_PLT64", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 ONES (64), /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* 64-bit PC relative relocation to the symbol's procedure linkage
895 table. */
896 /* FIXME: R_PPC64_PLTREL64 not supported. */
897 HOWTO (R_PPC64_PLTREL64, /* type */
898 0, /* rightshift */
899 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
900 64, /* bitsize */
901 TRUE, /* pc_relative */
902 0, /* bitpos */
903 complain_overflow_dont, /* complain_on_overflow */
904 ppc64_elf_unhandled_reloc, /* special_function */
905 "R_PPC64_PLTREL64", /* name */
906 FALSE, /* partial_inplace */
907 0, /* src_mask */
908 ONES (64), /* dst_mask */
909 TRUE), /* pcrel_offset */
910
911 /* 16 bit TOC-relative relocation. */
912
913 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
914 HOWTO (R_PPC64_TOC16, /* type */
915 0, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_signed, /* complain_on_overflow */
921 ppc64_elf_toc_reloc, /* special_function */
922 "R_PPC64_TOC16", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* 16 bit TOC-relative relocation without overflow. */
929
930 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
931 HOWTO (R_PPC64_TOC16_LO, /* type */
932 0, /* rightshift */
933 1, /* size (0 = byte, 1 = short, 2 = long) */
934 16, /* bitsize */
935 FALSE, /* pc_relative */
936 0, /* bitpos */
937 complain_overflow_dont, /* complain_on_overflow */
938 ppc64_elf_toc_reloc, /* special_function */
939 "R_PPC64_TOC16_LO", /* name */
940 FALSE, /* partial_inplace */
941 0, /* src_mask */
942 0xffff, /* dst_mask */
943 FALSE), /* pcrel_offset */
944
945 /* 16 bit TOC-relative relocation, high 16 bits. */
946
947 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
948 HOWTO (R_PPC64_TOC16_HI, /* type */
949 16, /* rightshift */
950 1, /* size (0 = byte, 1 = short, 2 = long) */
951 16, /* bitsize */
952 FALSE, /* pc_relative */
953 0, /* bitpos */
954 complain_overflow_dont, /* complain_on_overflow */
955 ppc64_elf_toc_reloc, /* special_function */
956 "R_PPC64_TOC16_HI", /* name */
957 FALSE, /* partial_inplace */
958 0, /* src_mask */
959 0xffff, /* dst_mask */
960 FALSE), /* pcrel_offset */
961
962 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
963 contents of the low 16 bits, treated as a signed number, is
964 negative. */
965
966 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
967 HOWTO (R_PPC64_TOC16_HA, /* type */
968 16, /* rightshift */
969 1, /* size (0 = byte, 1 = short, 2 = long) */
970 16, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont, /* complain_on_overflow */
974 ppc64_elf_toc_ha_reloc, /* special_function */
975 "R_PPC64_TOC16_HA", /* name */
976 FALSE, /* partial_inplace */
977 0, /* src_mask */
978 0xffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 /* 64-bit relocation; insert value of TOC base (.TOC.). */
982
983 /* R_PPC64_TOC 51 doubleword64 .TOC. */
984 HOWTO (R_PPC64_TOC, /* type */
985 0, /* rightshift */
986 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
987 64, /* bitsize */
988 FALSE, /* pc_relative */
989 0, /* bitpos */
990 complain_overflow_bitfield, /* complain_on_overflow */
991 ppc64_elf_toc64_reloc, /* special_function */
992 "R_PPC64_TOC", /* name */
993 FALSE, /* partial_inplace */
994 0, /* src_mask */
995 ONES (64), /* dst_mask */
996 FALSE), /* pcrel_offset */
997
998 /* Like R_PPC64_GOT16, but also informs the link editor that the
999 value to relocate may (!) refer to a PLT entry which the link
1000 editor (a) may replace with the symbol value. If the link editor
1001 is unable to fully resolve the symbol, it may (b) create a PLT
1002 entry and store the address to the new PLT entry in the GOT.
1003 This permits lazy resolution of function symbols at run time.
1004 The link editor may also skip all of this and just (c) emit a
1005 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1006 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1007 HOWTO (R_PPC64_PLTGOT16, /* type */
1008 0, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_signed, /* complain_on_overflow */
1014 ppc64_elf_unhandled_reloc, /* special_function */
1015 "R_PPC64_PLTGOT16", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* Like R_PPC64_PLTGOT16, but without overflow. */
1022 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1023 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1024 0, /* rightshift */
1025 1, /* size (0 = byte, 1 = short, 2 = long) */
1026 16, /* bitsize */
1027 FALSE, /* pc_relative */
1028 0, /* bitpos */
1029 complain_overflow_dont, /* complain_on_overflow */
1030 ppc64_elf_unhandled_reloc, /* special_function */
1031 "R_PPC64_PLTGOT16_LO", /* name */
1032 FALSE, /* partial_inplace */
1033 0, /* src_mask */
1034 0xffff, /* dst_mask */
1035 FALSE), /* pcrel_offset */
1036
1037 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1038 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1039 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1040 16, /* rightshift */
1041 1, /* size (0 = byte, 1 = short, 2 = long) */
1042 16, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_unhandled_reloc, /* special_function */
1047 "R_PPC64_PLTGOT16_HI", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 0xffff, /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1054 1 if the contents of the low 16 bits, treated as a signed number,
1055 is negative. */
1056 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1058 16, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_dont,/* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16_HA", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1072 HOWTO (R_PPC64_ADDR16_DS, /* type */
1073 0, /* rightshift */
1074 1, /* size (0 = byte, 1 = short, 2 = long) */
1075 16, /* bitsize */
1076 FALSE, /* pc_relative */
1077 0, /* bitpos */
1078 complain_overflow_bitfield, /* complain_on_overflow */
1079 bfd_elf_generic_reloc, /* special_function */
1080 "R_PPC64_ADDR16_DS", /* name */
1081 FALSE, /* partial_inplace */
1082 0, /* src_mask */
1083 0xfffc, /* dst_mask */
1084 FALSE), /* pcrel_offset */
1085
1086 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1087 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1088 0, /* rightshift */
1089 1, /* size (0 = byte, 1 = short, 2 = long) */
1090 16, /* bitsize */
1091 FALSE, /* pc_relative */
1092 0, /* bitpos */
1093 complain_overflow_dont,/* complain_on_overflow */
1094 bfd_elf_generic_reloc, /* special_function */
1095 "R_PPC64_ADDR16_LO_DS",/* name */
1096 FALSE, /* partial_inplace */
1097 0, /* src_mask */
1098 0xfffc, /* dst_mask */
1099 FALSE), /* pcrel_offset */
1100
1101 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1102 HOWTO (R_PPC64_GOT16_DS, /* type */
1103 0, /* rightshift */
1104 1, /* size (0 = byte, 1 = short, 2 = long) */
1105 16, /* bitsize */
1106 FALSE, /* pc_relative */
1107 0, /* bitpos */
1108 complain_overflow_signed, /* complain_on_overflow */
1109 ppc64_elf_unhandled_reloc, /* special_function */
1110 "R_PPC64_GOT16_DS", /* name */
1111 FALSE, /* partial_inplace */
1112 0, /* src_mask */
1113 0xfffc, /* dst_mask */
1114 FALSE), /* pcrel_offset */
1115
1116 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1117 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1118 0, /* rightshift */
1119 1, /* size (0 = byte, 1 = short, 2 = long) */
1120 16, /* bitsize */
1121 FALSE, /* pc_relative */
1122 0, /* bitpos */
1123 complain_overflow_dont, /* complain_on_overflow */
1124 ppc64_elf_unhandled_reloc, /* special_function */
1125 "R_PPC64_GOT16_LO_DS", /* name */
1126 FALSE, /* partial_inplace */
1127 0, /* src_mask */
1128 0xfffc, /* dst_mask */
1129 FALSE), /* pcrel_offset */
1130
1131 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1132 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1133 0, /* rightshift */
1134 1, /* size (0 = byte, 1 = short, 2 = long) */
1135 16, /* bitsize */
1136 FALSE, /* pc_relative */
1137 0, /* bitpos */
1138 complain_overflow_dont, /* complain_on_overflow */
1139 ppc64_elf_unhandled_reloc, /* special_function */
1140 "R_PPC64_PLT16_LO_DS", /* name */
1141 FALSE, /* partial_inplace */
1142 0, /* src_mask */
1143 0xfffc, /* dst_mask */
1144 FALSE), /* pcrel_offset */
1145
1146 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1147 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1148 0, /* rightshift */
1149 1, /* size (0 = byte, 1 = short, 2 = long) */
1150 16, /* bitsize */
1151 FALSE, /* pc_relative */
1152 0, /* bitpos */
1153 complain_overflow_bitfield, /* complain_on_overflow */
1154 ppc64_elf_sectoff_reloc, /* special_function */
1155 "R_PPC64_SECTOFF_DS", /* name */
1156 FALSE, /* partial_inplace */
1157 0, /* src_mask */
1158 0xfffc, /* dst_mask */
1159 FALSE), /* pcrel_offset */
1160
1161 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1162 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1163 0, /* rightshift */
1164 1, /* size (0 = byte, 1 = short, 2 = long) */
1165 16, /* bitsize */
1166 FALSE, /* pc_relative */
1167 0, /* bitpos */
1168 complain_overflow_dont, /* complain_on_overflow */
1169 ppc64_elf_sectoff_reloc, /* special_function */
1170 "R_PPC64_SECTOFF_LO_DS",/* name */
1171 FALSE, /* partial_inplace */
1172 0, /* src_mask */
1173 0xfffc, /* dst_mask */
1174 FALSE), /* pcrel_offset */
1175
1176 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1177 HOWTO (R_PPC64_TOC16_DS, /* type */
1178 0, /* rightshift */
1179 1, /* size (0 = byte, 1 = short, 2 = long) */
1180 16, /* bitsize */
1181 FALSE, /* pc_relative */
1182 0, /* bitpos */
1183 complain_overflow_signed, /* complain_on_overflow */
1184 ppc64_elf_toc_reloc, /* special_function */
1185 "R_PPC64_TOC16_DS", /* name */
1186 FALSE, /* partial_inplace */
1187 0, /* src_mask */
1188 0xfffc, /* dst_mask */
1189 FALSE), /* pcrel_offset */
1190
1191 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1192 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1193 0, /* rightshift */
1194 1, /* size (0 = byte, 1 = short, 2 = long) */
1195 16, /* bitsize */
1196 FALSE, /* pc_relative */
1197 0, /* bitpos */
1198 complain_overflow_dont, /* complain_on_overflow */
1199 ppc64_elf_toc_reloc, /* special_function */
1200 "R_PPC64_TOC16_LO_DS", /* name */
1201 FALSE, /* partial_inplace */
1202 0, /* src_mask */
1203 0xfffc, /* dst_mask */
1204 FALSE), /* pcrel_offset */
1205
1206 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1207 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1208 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1209 0, /* rightshift */
1210 1, /* size (0 = byte, 1 = short, 2 = long) */
1211 16, /* bitsize */
1212 FALSE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_signed, /* complain_on_overflow */
1215 ppc64_elf_unhandled_reloc, /* special_function */
1216 "R_PPC64_PLTGOT16_DS", /* name */
1217 FALSE, /* partial_inplace */
1218 0, /* src_mask */
1219 0xfffc, /* dst_mask */
1220 FALSE), /* pcrel_offset */
1221
1222 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1223 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1224 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1225 0, /* rightshift */
1226 1, /* size (0 = byte, 1 = short, 2 = long) */
1227 16, /* bitsize */
1228 FALSE, /* pc_relative */
1229 0, /* bitpos */
1230 complain_overflow_dont, /* complain_on_overflow */
1231 ppc64_elf_unhandled_reloc, /* special_function */
1232 "R_PPC64_PLTGOT16_LO_DS",/* name */
1233 FALSE, /* partial_inplace */
1234 0, /* src_mask */
1235 0xfffc, /* dst_mask */
1236 FALSE), /* pcrel_offset */
1237
1238 /* Marker reloc for TLS. */
1239 HOWTO (R_PPC64_TLS,
1240 0, /* rightshift */
1241 2, /* size (0 = byte, 1 = short, 2 = long) */
1242 32, /* bitsize */
1243 FALSE, /* pc_relative */
1244 0, /* bitpos */
1245 complain_overflow_dont, /* complain_on_overflow */
1246 bfd_elf_generic_reloc, /* special_function */
1247 "R_PPC64_TLS", /* name */
1248 FALSE, /* partial_inplace */
1249 0, /* src_mask */
1250 0, /* dst_mask */
1251 FALSE), /* pcrel_offset */
1252
1253 /* Computes the load module index of the load module that contains the
1254 definition of its TLS sym. */
1255 HOWTO (R_PPC64_DTPMOD64,
1256 0, /* rightshift */
1257 4, /* size (0 = byte, 1 = short, 2 = long) */
1258 64, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_dont, /* complain_on_overflow */
1262 ppc64_elf_unhandled_reloc, /* special_function */
1263 "R_PPC64_DTPMOD64", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 ONES (64), /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 /* Computes a dtv-relative displacement, the difference between the value
1270 of sym+add and the base address of the thread-local storage block that
1271 contains the definition of sym, minus 0x8000. */
1272 HOWTO (R_PPC64_DTPREL64,
1273 0, /* rightshift */
1274 4, /* size (0 = byte, 1 = short, 2 = long) */
1275 64, /* bitsize */
1276 FALSE, /* pc_relative */
1277 0, /* bitpos */
1278 complain_overflow_dont, /* complain_on_overflow */
1279 ppc64_elf_unhandled_reloc, /* special_function */
1280 "R_PPC64_DTPREL64", /* name */
1281 FALSE, /* partial_inplace */
1282 0, /* src_mask */
1283 ONES (64), /* dst_mask */
1284 FALSE), /* pcrel_offset */
1285
1286 /* A 16 bit dtprel reloc. */
1287 HOWTO (R_PPC64_DTPREL16,
1288 0, /* rightshift */
1289 1, /* size (0 = byte, 1 = short, 2 = long) */
1290 16, /* bitsize */
1291 FALSE, /* pc_relative */
1292 0, /* bitpos */
1293 complain_overflow_signed, /* complain_on_overflow */
1294 ppc64_elf_unhandled_reloc, /* special_function */
1295 "R_PPC64_DTPREL16", /* name */
1296 FALSE, /* partial_inplace */
1297 0, /* src_mask */
1298 0xffff, /* dst_mask */
1299 FALSE), /* pcrel_offset */
1300
1301 /* Like DTPREL16, but no overflow. */
1302 HOWTO (R_PPC64_DTPREL16_LO,
1303 0, /* rightshift */
1304 1, /* size (0 = byte, 1 = short, 2 = long) */
1305 16, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_dont, /* complain_on_overflow */
1309 ppc64_elf_unhandled_reloc, /* special_function */
1310 "R_PPC64_DTPREL16_LO", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 0xffff, /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1317 HOWTO (R_PPC64_DTPREL16_HI,
1318 16, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 ppc64_elf_unhandled_reloc, /* special_function */
1325 "R_PPC64_DTPREL16_HI", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1332 HOWTO (R_PPC64_DTPREL16_HA,
1333 16, /* rightshift */
1334 1, /* size (0 = byte, 1 = short, 2 = long) */
1335 16, /* bitsize */
1336 FALSE, /* pc_relative */
1337 0, /* bitpos */
1338 complain_overflow_dont, /* complain_on_overflow */
1339 ppc64_elf_unhandled_reloc, /* special_function */
1340 "R_PPC64_DTPREL16_HA", /* name */
1341 FALSE, /* partial_inplace */
1342 0, /* src_mask */
1343 0xffff, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1345
1346 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1347 HOWTO (R_PPC64_DTPREL16_HIGHER,
1348 32, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPREL16_HIGHER", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1362 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1363 32, /* rightshift */
1364 1, /* size (0 = byte, 1 = short, 2 = long) */
1365 16, /* bitsize */
1366 FALSE, /* pc_relative */
1367 0, /* bitpos */
1368 complain_overflow_dont, /* complain_on_overflow */
1369 ppc64_elf_unhandled_reloc, /* special_function */
1370 "R_PPC64_DTPREL16_HIGHERA", /* name */
1371 FALSE, /* partial_inplace */
1372 0, /* src_mask */
1373 0xffff, /* dst_mask */
1374 FALSE), /* pcrel_offset */
1375
1376 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1377 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1378 48, /* rightshift */
1379 1, /* size (0 = byte, 1 = short, 2 = long) */
1380 16, /* bitsize */
1381 FALSE, /* pc_relative */
1382 0, /* bitpos */
1383 complain_overflow_dont, /* complain_on_overflow */
1384 ppc64_elf_unhandled_reloc, /* special_function */
1385 "R_PPC64_DTPREL16_HIGHEST", /* name */
1386 FALSE, /* partial_inplace */
1387 0, /* src_mask */
1388 0xffff, /* dst_mask */
1389 FALSE), /* pcrel_offset */
1390
1391 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1392 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1393 48, /* rightshift */
1394 1, /* size (0 = byte, 1 = short, 2 = long) */
1395 16, /* bitsize */
1396 FALSE, /* pc_relative */
1397 0, /* bitpos */
1398 complain_overflow_dont, /* complain_on_overflow */
1399 ppc64_elf_unhandled_reloc, /* special_function */
1400 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1401 FALSE, /* partial_inplace */
1402 0, /* src_mask */
1403 0xffff, /* dst_mask */
1404 FALSE), /* pcrel_offset */
1405
1406 /* Like DTPREL16, but for insns with a DS field. */
1407 HOWTO (R_PPC64_DTPREL16_DS,
1408 0, /* rightshift */
1409 1, /* size (0 = byte, 1 = short, 2 = long) */
1410 16, /* bitsize */
1411 FALSE, /* pc_relative */
1412 0, /* bitpos */
1413 complain_overflow_signed, /* complain_on_overflow */
1414 ppc64_elf_unhandled_reloc, /* special_function */
1415 "R_PPC64_DTPREL16_DS", /* name */
1416 FALSE, /* partial_inplace */
1417 0, /* src_mask */
1418 0xfffc, /* dst_mask */
1419 FALSE), /* pcrel_offset */
1420
1421 /* Like DTPREL16_DS, but no overflow. */
1422 HOWTO (R_PPC64_DTPREL16_LO_DS,
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_dont, /* complain_on_overflow */
1429 ppc64_elf_unhandled_reloc, /* special_function */
1430 "R_PPC64_DTPREL16_LO_DS", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xfffc, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* Computes a tp-relative displacement, the difference between the value of
1437 sym+add and the value of the thread pointer (r13). */
1438 HOWTO (R_PPC64_TPREL64,
1439 0, /* rightshift */
1440 4, /* size (0 = byte, 1 = short, 2 = long) */
1441 64, /* bitsize */
1442 FALSE, /* pc_relative */
1443 0, /* bitpos */
1444 complain_overflow_dont, /* complain_on_overflow */
1445 ppc64_elf_unhandled_reloc, /* special_function */
1446 "R_PPC64_TPREL64", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 ONES (64), /* dst_mask */
1450 FALSE), /* pcrel_offset */
1451
1452 /* A 16 bit tprel reloc. */
1453 HOWTO (R_PPC64_TPREL16,
1454 0, /* rightshift */
1455 1, /* size (0 = byte, 1 = short, 2 = long) */
1456 16, /* bitsize */
1457 FALSE, /* pc_relative */
1458 0, /* bitpos */
1459 complain_overflow_signed, /* complain_on_overflow */
1460 ppc64_elf_unhandled_reloc, /* special_function */
1461 "R_PPC64_TPREL16", /* name */
1462 FALSE, /* partial_inplace */
1463 0, /* src_mask */
1464 0xffff, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1466
1467 /* Like TPREL16, but no overflow. */
1468 HOWTO (R_PPC64_TPREL16_LO,
1469 0, /* rightshift */
1470 1, /* size (0 = byte, 1 = short, 2 = long) */
1471 16, /* bitsize */
1472 FALSE, /* pc_relative */
1473 0, /* bitpos */
1474 complain_overflow_dont, /* complain_on_overflow */
1475 ppc64_elf_unhandled_reloc, /* special_function */
1476 "R_PPC64_TPREL16_LO", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 0xffff, /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* Like TPREL16_LO, but next higher group of 16 bits. */
1483 HOWTO (R_PPC64_TPREL16_HI,
1484 16, /* rightshift */
1485 1, /* size (0 = byte, 1 = short, 2 = long) */
1486 16, /* bitsize */
1487 FALSE, /* pc_relative */
1488 0, /* bitpos */
1489 complain_overflow_dont, /* complain_on_overflow */
1490 ppc64_elf_unhandled_reloc, /* special_function */
1491 "R_PPC64_TPREL16_HI", /* name */
1492 FALSE, /* partial_inplace */
1493 0, /* src_mask */
1494 0xffff, /* dst_mask */
1495 FALSE), /* pcrel_offset */
1496
1497 /* Like TPREL16_HI, but adjust for low 16 bits. */
1498 HOWTO (R_PPC64_TPREL16_HA,
1499 16, /* rightshift */
1500 1, /* size (0 = byte, 1 = short, 2 = long) */
1501 16, /* bitsize */
1502 FALSE, /* pc_relative */
1503 0, /* bitpos */
1504 complain_overflow_dont, /* complain_on_overflow */
1505 ppc64_elf_unhandled_reloc, /* special_function */
1506 "R_PPC64_TPREL16_HA", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0xffff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Like TPREL16_HI, but next higher group of 16 bits. */
1513 HOWTO (R_PPC64_TPREL16_HIGHER,
1514 32, /* rightshift */
1515 1, /* size (0 = byte, 1 = short, 2 = long) */
1516 16, /* bitsize */
1517 FALSE, /* pc_relative */
1518 0, /* bitpos */
1519 complain_overflow_dont, /* complain_on_overflow */
1520 ppc64_elf_unhandled_reloc, /* special_function */
1521 "R_PPC64_TPREL16_HIGHER", /* name */
1522 FALSE, /* partial_inplace */
1523 0, /* src_mask */
1524 0xffff, /* dst_mask */
1525 FALSE), /* pcrel_offset */
1526
1527 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1528 HOWTO (R_PPC64_TPREL16_HIGHERA,
1529 32, /* rightshift */
1530 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 16, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_dont, /* complain_on_overflow */
1535 ppc64_elf_unhandled_reloc, /* special_function */
1536 "R_PPC64_TPREL16_HIGHERA", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0xffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1543 HOWTO (R_PPC64_TPREL16_HIGHEST,
1544 48, /* rightshift */
1545 1, /* size (0 = byte, 1 = short, 2 = long) */
1546 16, /* bitsize */
1547 FALSE, /* pc_relative */
1548 0, /* bitpos */
1549 complain_overflow_dont, /* complain_on_overflow */
1550 ppc64_elf_unhandled_reloc, /* special_function */
1551 "R_PPC64_TPREL16_HIGHEST", /* name */
1552 FALSE, /* partial_inplace */
1553 0, /* src_mask */
1554 0xffff, /* dst_mask */
1555 FALSE), /* pcrel_offset */
1556
1557 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1558 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1559 48, /* rightshift */
1560 1, /* size (0 = byte, 1 = short, 2 = long) */
1561 16, /* bitsize */
1562 FALSE, /* pc_relative */
1563 0, /* bitpos */
1564 complain_overflow_dont, /* complain_on_overflow */
1565 ppc64_elf_unhandled_reloc, /* special_function */
1566 "R_PPC64_TPREL16_HIGHESTA", /* name */
1567 FALSE, /* partial_inplace */
1568 0, /* src_mask */
1569 0xffff, /* dst_mask */
1570 FALSE), /* pcrel_offset */
1571
1572 /* Like TPREL16, but for insns with a DS field. */
1573 HOWTO (R_PPC64_TPREL16_DS,
1574 0, /* rightshift */
1575 1, /* size (0 = byte, 1 = short, 2 = long) */
1576 16, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_signed, /* complain_on_overflow */
1580 ppc64_elf_unhandled_reloc, /* special_function */
1581 "R_PPC64_TPREL16_DS", /* name */
1582 FALSE, /* partial_inplace */
1583 0, /* src_mask */
1584 0xfffc, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 /* Like TPREL16_DS, but no overflow. */
1588 HOWTO (R_PPC64_TPREL16_LO_DS,
1589 0, /* rightshift */
1590 1, /* size (0 = byte, 1 = short, 2 = long) */
1591 16, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_dont, /* complain_on_overflow */
1595 ppc64_elf_unhandled_reloc, /* special_function */
1596 "R_PPC64_TPREL16_LO_DS", /* name */
1597 FALSE, /* partial_inplace */
1598 0, /* src_mask */
1599 0xfffc, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1603 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1604 to the first entry relative to the TOC base (r2). */
1605 HOWTO (R_PPC64_GOT_TLSGD16,
1606 0, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_signed, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_GOT_TLSGD16", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like GOT_TLSGD16, but no overflow. */
1620 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1621 0, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_GOT_TLSGD16_LO", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1636 16, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_GOT_TLSGD16_HI", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1651 16, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_GOT_TLSGD16_HA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1665 with values (sym+add)@dtpmod and zero, and computes the offset to the
1666 first entry relative to the TOC base (r2). */
1667 HOWTO (R_PPC64_GOT_TLSLD16,
1668 0, /* rightshift */
1669 1, /* size (0 = byte, 1 = short, 2 = long) */
1670 16, /* bitsize */
1671 FALSE, /* pc_relative */
1672 0, /* bitpos */
1673 complain_overflow_signed, /* complain_on_overflow */
1674 ppc64_elf_unhandled_reloc, /* special_function */
1675 "R_PPC64_GOT_TLSLD16", /* name */
1676 FALSE, /* partial_inplace */
1677 0, /* src_mask */
1678 0xffff, /* dst_mask */
1679 FALSE), /* pcrel_offset */
1680
1681 /* Like GOT_TLSLD16, but no overflow. */
1682 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1683 0, /* rightshift */
1684 1, /* size (0 = byte, 1 = short, 2 = long) */
1685 16, /* bitsize */
1686 FALSE, /* pc_relative */
1687 0, /* bitpos */
1688 complain_overflow_dont, /* complain_on_overflow */
1689 ppc64_elf_unhandled_reloc, /* special_function */
1690 "R_PPC64_GOT_TLSLD16_LO", /* name */
1691 FALSE, /* partial_inplace */
1692 0, /* src_mask */
1693 0xffff, /* dst_mask */
1694 FALSE), /* pcrel_offset */
1695
1696 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1697 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1698 16, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_dont, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSLD16_HI", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1712 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1713 16, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSLD16_HA", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1727 the offset to the entry relative to the TOC base (r2). */
1728 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1729 0, /* rightshift */
1730 1, /* size (0 = byte, 1 = short, 2 = long) */
1731 16, /* bitsize */
1732 FALSE, /* pc_relative */
1733 0, /* bitpos */
1734 complain_overflow_signed, /* complain_on_overflow */
1735 ppc64_elf_unhandled_reloc, /* special_function */
1736 "R_PPC64_GOT_DTPREL16_DS", /* name */
1737 FALSE, /* partial_inplace */
1738 0, /* src_mask */
1739 0xfffc, /* dst_mask */
1740 FALSE), /* pcrel_offset */
1741
1742 /* Like GOT_DTPREL16_DS, but no overflow. */
1743 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1744 0, /* rightshift */
1745 1, /* size (0 = byte, 1 = short, 2 = long) */
1746 16, /* bitsize */
1747 FALSE, /* pc_relative */
1748 0, /* bitpos */
1749 complain_overflow_dont, /* complain_on_overflow */
1750 ppc64_elf_unhandled_reloc, /* special_function */
1751 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1752 FALSE, /* partial_inplace */
1753 0, /* src_mask */
1754 0xfffc, /* dst_mask */
1755 FALSE), /* pcrel_offset */
1756
1757 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1758 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1759 16, /* rightshift */
1760 1, /* size (0 = byte, 1 = short, 2 = long) */
1761 16, /* bitsize */
1762 FALSE, /* pc_relative */
1763 0, /* bitpos */
1764 complain_overflow_dont, /* complain_on_overflow */
1765 ppc64_elf_unhandled_reloc, /* special_function */
1766 "R_PPC64_GOT_DTPREL16_HI", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xffff, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1773 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1774 16, /* rightshift */
1775 1, /* size (0 = byte, 1 = short, 2 = long) */
1776 16, /* bitsize */
1777 FALSE, /* pc_relative */
1778 0, /* bitpos */
1779 complain_overflow_dont, /* complain_on_overflow */
1780 ppc64_elf_unhandled_reloc, /* special_function */
1781 "R_PPC64_GOT_DTPREL16_HA", /* name */
1782 FALSE, /* partial_inplace */
1783 0, /* src_mask */
1784 0xffff, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1786
1787 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1788 offset to the entry relative to the TOC base (r2). */
1789 HOWTO (R_PPC64_GOT_TPREL16_DS,
1790 0, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TPREL16_DS", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xfffc, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TPREL16_DS, but no overflow. */
1804 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1805 0, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_dont, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xfffc, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1819 HOWTO (R_PPC64_GOT_TPREL16_HI,
1820 16, /* rightshift */
1821 1, /* size (0 = byte, 1 = short, 2 = long) */
1822 16, /* bitsize */
1823 FALSE, /* pc_relative */
1824 0, /* bitpos */
1825 complain_overflow_dont, /* complain_on_overflow */
1826 ppc64_elf_unhandled_reloc, /* special_function */
1827 "R_PPC64_GOT_TPREL16_HI", /* name */
1828 FALSE, /* partial_inplace */
1829 0, /* src_mask */
1830 0xffff, /* dst_mask */
1831 FALSE), /* pcrel_offset */
1832
1833 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1834 HOWTO (R_PPC64_GOT_TPREL16_HA,
1835 16, /* rightshift */
1836 1, /* size (0 = byte, 1 = short, 2 = long) */
1837 16, /* bitsize */
1838 FALSE, /* pc_relative */
1839 0, /* bitpos */
1840 complain_overflow_dont, /* complain_on_overflow */
1841 ppc64_elf_unhandled_reloc, /* special_function */
1842 "R_PPC64_GOT_TPREL16_HA", /* name */
1843 FALSE, /* partial_inplace */
1844 0, /* src_mask */
1845 0xffff, /* dst_mask */
1846 FALSE), /* pcrel_offset */
1847
1848 /* GNU extension to record C++ vtable hierarchy. */
1849 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1850 0, /* rightshift */
1851 0, /* size (0 = byte, 1 = short, 2 = long) */
1852 0, /* bitsize */
1853 FALSE, /* pc_relative */
1854 0, /* bitpos */
1855 complain_overflow_dont, /* complain_on_overflow */
1856 NULL, /* special_function */
1857 "R_PPC64_GNU_VTINHERIT", /* name */
1858 FALSE, /* partial_inplace */
1859 0, /* src_mask */
1860 0, /* dst_mask */
1861 FALSE), /* pcrel_offset */
1862
1863 /* GNU extension to record C++ vtable member usage. */
1864 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1865 0, /* rightshift */
1866 0, /* size (0 = byte, 1 = short, 2 = long) */
1867 0, /* bitsize */
1868 FALSE, /* pc_relative */
1869 0, /* bitpos */
1870 complain_overflow_dont, /* complain_on_overflow */
1871 NULL, /* special_function */
1872 "R_PPC64_GNU_VTENTRY", /* name */
1873 FALSE, /* partial_inplace */
1874 0, /* src_mask */
1875 0, /* dst_mask */
1876 FALSE), /* pcrel_offset */
1877 };
1878
1879 \f
1880 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1881 be done. */
1882
1883 static void
1884 ppc_howto_init (void)
1885 {
1886 unsigned int i, type;
1887
1888 for (i = 0;
1889 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1890 i++)
1891 {
1892 type = ppc64_elf_howto_raw[i].type;
1893 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1894 / sizeof (ppc64_elf_howto_table[0])));
1895 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1896 }
1897 }
1898
1899 static reloc_howto_type *
1900 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1901 bfd_reloc_code_real_type code)
1902 {
1903 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1904
1905 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1906 /* Initialize howto table if needed. */
1907 ppc_howto_init ();
1908
1909 switch (code)
1910 {
1911 default:
1912 return NULL;
1913
1914 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1915 break;
1916 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1917 break;
1918 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1919 break;
1920 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1921 break;
1922 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1923 break;
1924 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1925 break;
1926 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1927 break;
1928 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1929 break;
1930 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1931 break;
1932 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1933 break;
1934 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1935 break;
1936 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1937 break;
1938 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1939 break;
1940 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1941 break;
1942 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1943 break;
1944 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1945 break;
1946 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1947 break;
1948 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1949 break;
1950 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1951 break;
1952 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1953 break;
1954 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1955 break;
1956 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1957 break;
1958 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1959 break;
1960 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1961 break;
1962 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1963 break;
1964 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1965 break;
1966 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1967 break;
1968 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1969 break;
1970 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1971 break;
1972 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1973 break;
1974 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1975 break;
1976 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1977 break;
1978 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1979 break;
1980 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1981 break;
1982 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1983 break;
1984 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1985 break;
1986 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1987 break;
1988 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1989 break;
1990 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1991 break;
1992 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1993 break;
1994 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1995 break;
1996 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1997 break;
1998 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1999 break;
2000 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2001 break;
2002 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2003 break;
2004 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2005 break;
2006 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2007 break;
2008 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2009 break;
2010 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2011 break;
2012 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2013 break;
2014 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2015 break;
2016 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2017 break;
2018 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2019 break;
2020 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2021 break;
2022 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2023 break;
2024 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2025 break;
2026 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2027 break;
2028 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2029 break;
2030 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2031 break;
2032 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2033 break;
2034 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2035 break;
2036 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2037 break;
2038 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2039 break;
2040 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2041 break;
2042 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2043 break;
2044 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2045 break;
2046 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2047 break;
2048 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2049 break;
2050 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2051 break;
2052 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2053 break;
2054 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2065 break;
2066 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2067 break;
2068 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2069 break;
2070 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2071 break;
2072 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2073 break;
2074 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2075 break;
2076 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2077 break;
2078 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2079 break;
2080 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2081 break;
2082 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2083 break;
2084 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2085 break;
2086 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2087 break;
2088 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2089 break;
2090 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2091 break;
2092 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2093 break;
2094 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2095 break;
2096 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2097 break;
2098 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2099 break;
2100 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2101 break;
2102 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2103 break;
2104 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2105 break;
2106 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2107 break;
2108 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2109 break;
2110 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2111 break;
2112 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2113 break;
2114 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2115 break;
2116 }
2117
2118 return ppc64_elf_howto_table[r];
2119 };
2120
2121 static reloc_howto_type *
2122 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2123 const char *r_name)
2124 {
2125 unsigned int i;
2126
2127 for (i = 0;
2128 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2129 i++)
2130 if (ppc64_elf_howto_raw[i].name != NULL
2131 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2132 return &ppc64_elf_howto_raw[i];
2133
2134 return NULL;
2135 }
2136
2137 /* Set the howto pointer for a PowerPC ELF reloc. */
2138
2139 static void
2140 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2141 Elf_Internal_Rela *dst)
2142 {
2143 unsigned int type;
2144
2145 /* Initialize howto table if needed. */
2146 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2147 ppc_howto_init ();
2148
2149 type = ELF64_R_TYPE (dst->r_info);
2150 if (type >= (sizeof (ppc64_elf_howto_table)
2151 / sizeof (ppc64_elf_howto_table[0])))
2152 {
2153 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2154 abfd, (int) type);
2155 type = R_PPC64_NONE;
2156 }
2157 cache_ptr->howto = ppc64_elf_howto_table[type];
2158 }
2159
2160 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2161
2162 static bfd_reloc_status_type
2163 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2164 void *data, asection *input_section,
2165 bfd *output_bfd, char **error_message)
2166 {
2167 /* If this is a relocatable link (output_bfd test tells us), just
2168 call the generic function. Any adjustment will be done at final
2169 link time. */
2170 if (output_bfd != NULL)
2171 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2172 input_section, output_bfd, error_message);
2173
2174 /* Adjust the addend for sign extension of the low 16 bits.
2175 We won't actually be using the low 16 bits, so trashing them
2176 doesn't matter. */
2177 reloc_entry->addend += 0x8000;
2178 return bfd_reloc_continue;
2179 }
2180
2181 static bfd_reloc_status_type
2182 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2183 void *data, asection *input_section,
2184 bfd *output_bfd, char **error_message)
2185 {
2186 if (output_bfd != NULL)
2187 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2188 input_section, output_bfd, error_message);
2189
2190 if (strcmp (symbol->section->name, ".opd") == 0
2191 && (symbol->section->owner->flags & DYNAMIC) == 0)
2192 {
2193 bfd_vma dest = opd_entry_value (symbol->section,
2194 symbol->value + reloc_entry->addend,
2195 NULL, NULL);
2196 if (dest != (bfd_vma) -1)
2197 reloc_entry->addend = dest - (symbol->value
2198 + symbol->section->output_section->vma
2199 + symbol->section->output_offset);
2200 }
2201 return bfd_reloc_continue;
2202 }
2203
2204 static bfd_reloc_status_type
2205 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2206 void *data, asection *input_section,
2207 bfd *output_bfd, char **error_message)
2208 {
2209 long insn;
2210 enum elf_ppc64_reloc_type r_type;
2211 bfd_size_type octets;
2212 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2213 bfd_boolean is_power4 = FALSE;
2214
2215 /* If this is a relocatable link (output_bfd test tells us), just
2216 call the generic function. Any adjustment will be done at final
2217 link time. */
2218 if (output_bfd != NULL)
2219 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2220 input_section, output_bfd, error_message);
2221
2222 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2223 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2224 insn &= ~(0x01 << 21);
2225 r_type = reloc_entry->howto->type;
2226 if (r_type == R_PPC64_ADDR14_BRTAKEN
2227 || r_type == R_PPC64_REL14_BRTAKEN)
2228 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2229
2230 if (is_power4)
2231 {
2232 /* Set 'a' bit. This is 0b00010 in BO field for branch
2233 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2234 for branch on CTR insns (BO == 1a00t or 1a01t). */
2235 if ((insn & (0x14 << 21)) == (0x04 << 21))
2236 insn |= 0x02 << 21;
2237 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2238 insn |= 0x08 << 21;
2239 else
2240 goto out;
2241 }
2242 else
2243 {
2244 bfd_vma target = 0;
2245 bfd_vma from;
2246
2247 if (!bfd_is_com_section (symbol->section))
2248 target = symbol->value;
2249 target += symbol->section->output_section->vma;
2250 target += symbol->section->output_offset;
2251 target += reloc_entry->addend;
2252
2253 from = (reloc_entry->address
2254 + input_section->output_offset
2255 + input_section->output_section->vma);
2256
2257 /* Invert 'y' bit if not the default. */
2258 if ((bfd_signed_vma) (target - from) < 0)
2259 insn ^= 0x01 << 21;
2260 }
2261 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2262 out:
2263 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2264 input_section, output_bfd, error_message);
2265 }
2266
2267 static bfd_reloc_status_type
2268 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2269 void *data, asection *input_section,
2270 bfd *output_bfd, char **error_message)
2271 {
2272 /* If this is a relocatable link (output_bfd test tells us), just
2273 call the generic function. Any adjustment will be done at final
2274 link time. */
2275 if (output_bfd != NULL)
2276 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2277 input_section, output_bfd, error_message);
2278
2279 /* Subtract the symbol section base address. */
2280 reloc_entry->addend -= symbol->section->output_section->vma;
2281 return bfd_reloc_continue;
2282 }
2283
2284 static bfd_reloc_status_type
2285 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2286 void *data, asection *input_section,
2287 bfd *output_bfd, char **error_message)
2288 {
2289 /* If this is a relocatable link (output_bfd test tells us), just
2290 call the generic function. Any adjustment will be done at final
2291 link time. */
2292 if (output_bfd != NULL)
2293 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2294 input_section, output_bfd, error_message);
2295
2296 /* Subtract the symbol section base address. */
2297 reloc_entry->addend -= symbol->section->output_section->vma;
2298
2299 /* Adjust the addend for sign extension of the low 16 bits. */
2300 reloc_entry->addend += 0x8000;
2301 return bfd_reloc_continue;
2302 }
2303
2304 static bfd_reloc_status_type
2305 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2306 void *data, asection *input_section,
2307 bfd *output_bfd, char **error_message)
2308 {
2309 bfd_vma TOCstart;
2310
2311 /* If this is a relocatable link (output_bfd test tells us), just
2312 call the generic function. Any adjustment will be done at final
2313 link time. */
2314 if (output_bfd != NULL)
2315 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2316 input_section, output_bfd, error_message);
2317
2318 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2319 if (TOCstart == 0)
2320 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2321
2322 /* Subtract the TOC base address. */
2323 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2324 return bfd_reloc_continue;
2325 }
2326
2327 static bfd_reloc_status_type
2328 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2329 void *data, asection *input_section,
2330 bfd *output_bfd, char **error_message)
2331 {
2332 bfd_vma TOCstart;
2333
2334 /* If this is a relocatable link (output_bfd test tells us), just
2335 call the generic function. Any adjustment will be done at final
2336 link time. */
2337 if (output_bfd != NULL)
2338 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2339 input_section, output_bfd, error_message);
2340
2341 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2342 if (TOCstart == 0)
2343 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2344
2345 /* Subtract the TOC base address. */
2346 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2347
2348 /* Adjust the addend for sign extension of the low 16 bits. */
2349 reloc_entry->addend += 0x8000;
2350 return bfd_reloc_continue;
2351 }
2352
2353 static bfd_reloc_status_type
2354 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2355 void *data, asection *input_section,
2356 bfd *output_bfd, char **error_message)
2357 {
2358 bfd_vma TOCstart;
2359 bfd_size_type octets;
2360
2361 /* If this is a relocatable link (output_bfd test tells us), just
2362 call the generic function. Any adjustment will be done at final
2363 link time. */
2364 if (output_bfd != NULL)
2365 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2366 input_section, output_bfd, error_message);
2367
2368 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2369 if (TOCstart == 0)
2370 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2371
2372 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2373 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2374 return bfd_reloc_ok;
2375 }
2376
2377 static bfd_reloc_status_type
2378 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2379 void *data, asection *input_section,
2380 bfd *output_bfd, char **error_message)
2381 {
2382 /* If this is a relocatable link (output_bfd test tells us), just
2383 call the generic function. Any adjustment will be done at final
2384 link time. */
2385 if (output_bfd != NULL)
2386 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2387 input_section, output_bfd, error_message);
2388
2389 if (error_message != NULL)
2390 {
2391 static char buf[60];
2392 sprintf (buf, "generic linker can't handle %s",
2393 reloc_entry->howto->name);
2394 *error_message = buf;
2395 }
2396 return bfd_reloc_dangerous;
2397 }
2398
2399 struct ppc64_elf_obj_tdata
2400 {
2401 struct elf_obj_tdata elf;
2402
2403 /* Shortcuts to dynamic linker sections. */
2404 asection *got;
2405 asection *relgot;
2406
2407 /* Used during garbage collection. We attach global symbols defined
2408 on removed .opd entries to this section so that the sym is removed. */
2409 asection *deleted_section;
2410
2411 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2412 sections means we potentially need one of these for each input bfd. */
2413 union {
2414 bfd_signed_vma refcount;
2415 bfd_vma offset;
2416 } tlsld_got;
2417
2418 /* A copy of relocs before they are modified for --emit-relocs. */
2419 Elf_Internal_Rela *opd_relocs;
2420 };
2421
2422 #define ppc64_elf_tdata(bfd) \
2423 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2424
2425 #define ppc64_tlsld_got(bfd) \
2426 (&ppc64_elf_tdata (bfd)->tlsld_got)
2427
2428 #define is_ppc64_elf(bfd) \
2429 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2430 && elf_object_id (bfd) == PPC64_ELF_TDATA)
2431
2432 /* Override the generic function because we store some extras. */
2433
2434 static bfd_boolean
2435 ppc64_elf_mkobject (bfd *abfd)
2436 {
2437 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2438 PPC64_ELF_TDATA);
2439 }
2440
2441 /* Fix bad default arch selected for a 64 bit input bfd when the
2442 default is 32 bit. */
2443
2444 static bfd_boolean
2445 ppc64_elf_object_p (bfd *abfd)
2446 {
2447 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2448 {
2449 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2450
2451 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2452 {
2453 /* Relies on arch after 32 bit default being 64 bit default. */
2454 abfd->arch_info = abfd->arch_info->next;
2455 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2456 }
2457 }
2458 return TRUE;
2459 }
2460
2461 /* Support for core dump NOTE sections. */
2462
2463 static bfd_boolean
2464 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2465 {
2466 size_t offset, size;
2467
2468 if (note->descsz != 504)
2469 return FALSE;
2470
2471 /* pr_cursig */
2472 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2473
2474 /* pr_pid */
2475 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2476
2477 /* pr_reg */
2478 offset = 112;
2479 size = 384;
2480
2481 /* Make a ".reg/999" section. */
2482 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2483 size, note->descpos + offset);
2484 }
2485
2486 static bfd_boolean
2487 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2488 {
2489 if (note->descsz != 136)
2490 return FALSE;
2491
2492 elf_tdata (abfd)->core_program
2493 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2494 elf_tdata (abfd)->core_command
2495 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2496
2497 return TRUE;
2498 }
2499
2500 static char *
2501 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2502 ...)
2503 {
2504 switch (note_type)
2505 {
2506 default:
2507 return NULL;
2508
2509 case NT_PRPSINFO:
2510 {
2511 char data[136];
2512 va_list ap;
2513
2514 va_start (ap, note_type);
2515 memset (data, 0, 40);
2516 strncpy (data + 40, va_arg (ap, const char *), 16);
2517 strncpy (data + 56, va_arg (ap, const char *), 80);
2518 va_end (ap);
2519 return elfcore_write_note (abfd, buf, bufsiz,
2520 "CORE", note_type, data, sizeof (data));
2521 }
2522
2523 case NT_PRSTATUS:
2524 {
2525 char data[504];
2526 va_list ap;
2527 long pid;
2528 int cursig;
2529 const void *greg;
2530
2531 va_start (ap, note_type);
2532 memset (data, 0, 112);
2533 pid = va_arg (ap, long);
2534 bfd_put_32 (abfd, pid, data + 32);
2535 cursig = va_arg (ap, int);
2536 bfd_put_16 (abfd, cursig, data + 12);
2537 greg = va_arg (ap, const void *);
2538 memcpy (data + 112, greg, 384);
2539 memset (data + 496, 0, 8);
2540 va_end (ap);
2541 return elfcore_write_note (abfd, buf, bufsiz,
2542 "CORE", note_type, data, sizeof (data));
2543 }
2544 }
2545 }
2546
2547 /* Merge backend specific data from an object file to the output
2548 object file when linking. */
2549
2550 static bfd_boolean
2551 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2552 {
2553 /* Check if we have the same endianess. */
2554 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2555 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2556 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2557 {
2558 const char *msg;
2559
2560 if (bfd_big_endian (ibfd))
2561 msg = _("%B: compiled for a big endian system "
2562 "and target is little endian");
2563 else
2564 msg = _("%B: compiled for a little endian system "
2565 "and target is big endian");
2566
2567 (*_bfd_error_handler) (msg, ibfd);
2568
2569 bfd_set_error (bfd_error_wrong_format);
2570 return FALSE;
2571 }
2572
2573 return TRUE;
2574 }
2575
2576 /* Add extra PPC sections. */
2577
2578 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2579 {
2580 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2581 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2582 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2583 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2584 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2585 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2586 { NULL, 0, 0, 0, 0 }
2587 };
2588
2589 enum _ppc64_sec_type {
2590 sec_normal = 0,
2591 sec_opd = 1,
2592 sec_toc = 2
2593 };
2594
2595 struct _ppc64_elf_section_data
2596 {
2597 struct bfd_elf_section_data elf;
2598
2599 union
2600 {
2601 /* An array with one entry for each opd function descriptor. */
2602 struct _opd_sec_data
2603 {
2604 /* Points to the function code section for local opd entries. */
2605 asection **func_sec;
2606
2607 /* After editing .opd, adjust references to opd local syms. */
2608 long *adjust;
2609 } opd;
2610
2611 /* An array for toc sections, indexed by offset/8.
2612 Specifies the relocation symbol index used at a given toc offset. */
2613 unsigned *t_symndx;
2614 } u;
2615
2616 enum _ppc64_sec_type sec_type:2;
2617
2618 /* Flag set when small branches are detected. Used to
2619 select suitable defaults for the stub group size. */
2620 unsigned int has_14bit_branch:1;
2621 };
2622
2623 #define ppc64_elf_section_data(sec) \
2624 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2625
2626 static bfd_boolean
2627 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2628 {
2629 if (!sec->used_by_bfd)
2630 {
2631 struct _ppc64_elf_section_data *sdata;
2632 bfd_size_type amt = sizeof (*sdata);
2633
2634 sdata = bfd_zalloc (abfd, amt);
2635 if (sdata == NULL)
2636 return FALSE;
2637 sec->used_by_bfd = sdata;
2638 }
2639
2640 return _bfd_elf_new_section_hook (abfd, sec);
2641 }
2642
2643 static struct _opd_sec_data *
2644 get_opd_info (asection * sec)
2645 {
2646 if (sec != NULL
2647 && ppc64_elf_section_data (sec) != NULL
2648 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2649 return &ppc64_elf_section_data (sec)->u.opd;
2650 return NULL;
2651 }
2652 \f
2653 /* Parameters for the qsort hook. */
2654 static asection *synthetic_opd;
2655 static bfd_boolean synthetic_relocatable;
2656
2657 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2658
2659 static int
2660 compare_symbols (const void *ap, const void *bp)
2661 {
2662 const asymbol *a = * (const asymbol **) ap;
2663 const asymbol *b = * (const asymbol **) bp;
2664
2665 /* Section symbols first. */
2666 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2667 return -1;
2668 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2669 return 1;
2670
2671 /* then .opd symbols. */
2672 if (a->section == synthetic_opd && b->section != synthetic_opd)
2673 return -1;
2674 if (a->section != synthetic_opd && b->section == synthetic_opd)
2675 return 1;
2676
2677 /* then other code symbols. */
2678 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2679 == (SEC_CODE | SEC_ALLOC)
2680 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2681 != (SEC_CODE | SEC_ALLOC))
2682 return -1;
2683
2684 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2685 != (SEC_CODE | SEC_ALLOC)
2686 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2687 == (SEC_CODE | SEC_ALLOC))
2688 return 1;
2689
2690 if (synthetic_relocatable)
2691 {
2692 if (a->section->id < b->section->id)
2693 return -1;
2694
2695 if (a->section->id > b->section->id)
2696 return 1;
2697 }
2698
2699 if (a->value + a->section->vma < b->value + b->section->vma)
2700 return -1;
2701
2702 if (a->value + a->section->vma > b->value + b->section->vma)
2703 return 1;
2704
2705 /* For syms with the same value, prefer strong dynamic global function
2706 syms over other syms. */
2707 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2708 return -1;
2709
2710 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2711 return 1;
2712
2713 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2714 return -1;
2715
2716 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2717 return 1;
2718
2719 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2720 return -1;
2721
2722 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2723 return 1;
2724
2725 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2726 return -1;
2727
2728 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2729 return 1;
2730
2731 return 0;
2732 }
2733
2734 /* Search SYMS for a symbol of the given VALUE. */
2735
2736 static asymbol *
2737 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2738 {
2739 long mid;
2740
2741 if (id == -1)
2742 {
2743 while (lo < hi)
2744 {
2745 mid = (lo + hi) >> 1;
2746 if (syms[mid]->value + syms[mid]->section->vma < value)
2747 lo = mid + 1;
2748 else if (syms[mid]->value + syms[mid]->section->vma > value)
2749 hi = mid;
2750 else
2751 return syms[mid];
2752 }
2753 }
2754 else
2755 {
2756 while (lo < hi)
2757 {
2758 mid = (lo + hi) >> 1;
2759 if (syms[mid]->section->id < id)
2760 lo = mid + 1;
2761 else if (syms[mid]->section->id > id)
2762 hi = mid;
2763 else if (syms[mid]->value < value)
2764 lo = mid + 1;
2765 else if (syms[mid]->value > value)
2766 hi = mid;
2767 else
2768 return syms[mid];
2769 }
2770 }
2771 return NULL;
2772 }
2773
2774 static bfd_boolean
2775 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2776 {
2777 bfd_vma vma = *(bfd_vma *) ptr;
2778 return ((section->flags & SEC_ALLOC) != 0
2779 && section->vma <= vma
2780 && vma < section->vma + section->size);
2781 }
2782
2783 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2784 entry syms. Also generate @plt symbols for the glink branch table. */
2785
2786 static long
2787 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2788 long static_count, asymbol **static_syms,
2789 long dyn_count, asymbol **dyn_syms,
2790 asymbol **ret)
2791 {
2792 asymbol *s;
2793 long i;
2794 long count;
2795 char *names;
2796 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2797 asection *opd;
2798 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2799 asymbol **syms;
2800
2801 *ret = NULL;
2802
2803 opd = bfd_get_section_by_name (abfd, ".opd");
2804 if (opd == NULL)
2805 return 0;
2806
2807 symcount = static_count;
2808 if (!relocatable)
2809 symcount += dyn_count;
2810 if (symcount == 0)
2811 return 0;
2812
2813 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2814 if (syms == NULL)
2815 return -1;
2816
2817 if (!relocatable && static_count != 0 && dyn_count != 0)
2818 {
2819 /* Use both symbol tables. */
2820 memcpy (syms, static_syms, static_count * sizeof (*syms));
2821 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2822 }
2823 else if (!relocatable && static_count == 0)
2824 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2825 else
2826 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2827
2828 synthetic_opd = opd;
2829 synthetic_relocatable = relocatable;
2830 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2831
2832 if (!relocatable && symcount > 1)
2833 {
2834 long j;
2835 /* Trim duplicate syms, since we may have merged the normal and
2836 dynamic symbols. Actually, we only care about syms that have
2837 different values, so trim any with the same value. */
2838 for (i = 1, j = 1; i < symcount; ++i)
2839 if (syms[i - 1]->value + syms[i - 1]->section->vma
2840 != syms[i]->value + syms[i]->section->vma)
2841 syms[j++] = syms[i];
2842 symcount = j;
2843 }
2844
2845 i = 0;
2846 if (syms[i]->section == opd)
2847 ++i;
2848 codesecsym = i;
2849
2850 for (; i < symcount; ++i)
2851 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2852 != (SEC_CODE | SEC_ALLOC))
2853 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2854 break;
2855 codesecsymend = i;
2856
2857 for (; i < symcount; ++i)
2858 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2859 break;
2860 secsymend = i;
2861
2862 for (; i < symcount; ++i)
2863 if (syms[i]->section != opd)
2864 break;
2865 opdsymend = i;
2866
2867 for (; i < symcount; ++i)
2868 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2870 break;
2871 symcount = i;
2872
2873 count = 0;
2874
2875 if (relocatable)
2876 {
2877 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2878 arelent *r;
2879 size_t size;
2880 long relcount;
2881
2882 if (opdsymend == secsymend)
2883 goto done;
2884
2885 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2886 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2887 if (relcount == 0)
2888 goto done;
2889
2890 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2891 {
2892 count = -1;
2893 goto done;
2894 }
2895
2896 size = 0;
2897 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2898 {
2899 asymbol *sym;
2900
2901 while (r < opd->relocation + relcount
2902 && r->address < syms[i]->value + opd->vma)
2903 ++r;
2904
2905 if (r == opd->relocation + relcount)
2906 break;
2907
2908 if (r->address != syms[i]->value + opd->vma)
2909 continue;
2910
2911 if (r->howto->type != R_PPC64_ADDR64)
2912 continue;
2913
2914 sym = *r->sym_ptr_ptr;
2915 if (!sym_exists_at (syms, opdsymend, symcount,
2916 sym->section->id, sym->value + r->addend))
2917 {
2918 ++count;
2919 size += sizeof (asymbol);
2920 size += strlen (syms[i]->name) + 2;
2921 }
2922 }
2923
2924 s = *ret = bfd_malloc (size);
2925 if (s == NULL)
2926 {
2927 count = -1;
2928 goto done;
2929 }
2930
2931 names = (char *) (s + count);
2932
2933 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2934 {
2935 asymbol *sym;
2936
2937 while (r < opd->relocation + relcount
2938 && r->address < syms[i]->value + opd->vma)
2939 ++r;
2940
2941 if (r == opd->relocation + relcount)
2942 break;
2943
2944 if (r->address != syms[i]->value + opd->vma)
2945 continue;
2946
2947 if (r->howto->type != R_PPC64_ADDR64)
2948 continue;
2949
2950 sym = *r->sym_ptr_ptr;
2951 if (!sym_exists_at (syms, opdsymend, symcount,
2952 sym->section->id, sym->value + r->addend))
2953 {
2954 size_t len;
2955
2956 *s = *syms[i];
2957 s->section = sym->section;
2958 s->value = sym->value + r->addend;
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 /* Have udata.p point back to the original symbol this
2965 synthetic symbol was derived from. */
2966 s->udata.p = syms[i];
2967 s++;
2968 }
2969 }
2970 }
2971 else
2972 {
2973 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2974 bfd_byte *contents;
2975 size_t size;
2976 long plt_count = 0;
2977 bfd_vma glink_vma = 0, resolv_vma = 0;
2978 asection *dynamic, *glink = NULL, *relplt = NULL;
2979 arelent *p;
2980
2981 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2982 {
2983 if (contents)
2984 {
2985 free_contents_and_exit:
2986 free (contents);
2987 }
2988 count = -1;
2989 goto done;
2990 }
2991
2992 size = 0;
2993 for (i = secsymend; i < opdsymend; ++i)
2994 {
2995 bfd_vma ent;
2996
2997 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2998 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2999 {
3000 ++count;
3001 size += sizeof (asymbol);
3002 size += strlen (syms[i]->name) + 2;
3003 }
3004 }
3005
3006 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3007 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
3008 if (dynamic != NULL)
3009 {
3010 bfd_byte *dynbuf, *extdyn, *extdynend;
3011 size_t extdynsize;
3012 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3013
3014 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3015 goto free_contents_and_exit;
3016
3017 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3018 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3019
3020 extdyn = dynbuf;
3021 extdynend = extdyn + dynamic->size;
3022 for (; extdyn < extdynend; extdyn += extdynsize)
3023 {
3024 Elf_Internal_Dyn dyn;
3025 (*swap_dyn_in) (abfd, extdyn, &dyn);
3026
3027 if (dyn.d_tag == DT_NULL)
3028 break;
3029
3030 if (dyn.d_tag == DT_PPC64_GLINK)
3031 {
3032 /* The first glink stub starts at offset 32; see comment in
3033 ppc64_elf_finish_dynamic_sections. */
3034 glink_vma = dyn.d_un.d_val + 32;
3035 /* The .glink section usually does not survive the final
3036 link; search for the section (usually .text) where the
3037 glink stubs now reside. */
3038 glink = bfd_sections_find_if (abfd, section_covers_vma,
3039 &glink_vma);
3040 break;
3041 }
3042 }
3043
3044 free (dynbuf);
3045 }
3046
3047 if (glink != NULL)
3048 {
3049 /* Determine __glink trampoline by reading the relative branch
3050 from the first glink stub. */
3051 bfd_byte buf[4];
3052 if (bfd_get_section_contents (abfd, glink, buf,
3053 glink_vma + 4 - glink->vma, 4))
3054 {
3055 unsigned int insn = bfd_get_32 (abfd, buf);
3056 insn ^= B_DOT;
3057 if ((insn & ~0x3fffffc) == 0)
3058 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3059 }
3060
3061 if (resolv_vma)
3062 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3063 }
3064
3065 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3066 if (glink != NULL && relplt != NULL)
3067 {
3068 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3069 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3070 goto free_contents_and_exit;
3071
3072 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3073 size += plt_count * sizeof (asymbol);
3074
3075 p = relplt->relocation;
3076 for (i = 0; i < plt_count; i++, p++)
3077 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3078 }
3079
3080 s = *ret = bfd_malloc (size);
3081 if (s == NULL)
3082 goto free_contents_and_exit;
3083
3084 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3085
3086 for (i = secsymend; i < opdsymend; ++i)
3087 {
3088 bfd_vma ent;
3089
3090 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3091 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3092 {
3093 long lo, hi;
3094 size_t len;
3095 asection *sec = abfd->sections;
3096
3097 *s = *syms[i];
3098 lo = codesecsym;
3099 hi = codesecsymend;
3100 while (lo < hi)
3101 {
3102 long mid = (lo + hi) >> 1;
3103 if (syms[mid]->section->vma < ent)
3104 lo = mid + 1;
3105 else if (syms[mid]->section->vma > ent)
3106 hi = mid;
3107 else
3108 {
3109 sec = syms[mid]->section;
3110 break;
3111 }
3112 }
3113
3114 if (lo >= hi && lo > codesecsym)
3115 sec = syms[lo - 1]->section;
3116
3117 for (; sec != NULL; sec = sec->next)
3118 {
3119 if (sec->vma > ent)
3120 break;
3121 if ((sec->flags & SEC_ALLOC) == 0
3122 || (sec->flags & SEC_LOAD) == 0)
3123 break;
3124 if ((sec->flags & SEC_CODE) != 0)
3125 s->section = sec;
3126 }
3127 s->value = ent - s->section->vma;
3128 s->name = names;
3129 *names++ = '.';
3130 len = strlen (syms[i]->name);
3131 memcpy (names, syms[i]->name, len + 1);
3132 names += len + 1;
3133 /* Have udata.p point back to the original symbol this
3134 synthetic symbol was derived from. */
3135 s->udata.p = syms[i];
3136 s++;
3137 }
3138 }
3139 free (contents);
3140
3141 if (glink != NULL && relplt != NULL)
3142 {
3143 if (resolv_vma)
3144 {
3145 /* Add a symbol for the main glink trampoline. */
3146 memset (s, 0, sizeof *s);
3147 s->the_bfd = abfd;
3148 s->flags = BSF_GLOBAL;
3149 s->section = glink;
3150 s->value = resolv_vma - glink->vma;
3151 s->name = names;
3152 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3153 names += sizeof ("__glink_PLTresolve");
3154 s++;
3155 count++;
3156 }
3157
3158 /* FIXME: It would be very much nicer to put sym@plt on the
3159 stub rather than on the glink branch table entry. The
3160 objdump disassembler would then use a sensible symbol
3161 name on plt calls. The difficulty in doing so is
3162 a) finding the stubs, and,
3163 b) matching stubs against plt entries, and,
3164 c) there can be multiple stubs for a given plt entry.
3165
3166 Solving (a) could be done by code scanning, but older
3167 ppc64 binaries used different stubs to current code.
3168 (b) is the tricky one since you need to known the toc
3169 pointer for at least one function that uses a pic stub to
3170 be able to calculate the plt address referenced.
3171 (c) means gdb would need to set multiple breakpoints (or
3172 find the glink branch itself) when setting breakpoints
3173 for pending shared library loads. */
3174 p = relplt->relocation;
3175 for (i = 0; i < plt_count; i++, p++)
3176 {
3177 size_t len;
3178
3179 *s = **p->sym_ptr_ptr;
3180 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3181 we are defining a symbol, ensure one of them is set. */
3182 if ((s->flags & BSF_LOCAL) == 0)
3183 s->flags |= BSF_GLOBAL;
3184 s->section = glink;
3185 s->value = glink_vma - glink->vma;
3186 s->name = names;
3187 s->udata.p = NULL;
3188 len = strlen ((*p->sym_ptr_ptr)->name);
3189 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3190 names += len;
3191 memcpy (names, "@plt", sizeof ("@plt"));
3192 names += sizeof ("@plt");
3193 s++;
3194 glink_vma += 8;
3195 if (i >= 0x8000)
3196 glink_vma += 4;
3197 }
3198 count += plt_count;
3199 }
3200 }
3201
3202 done:
3203 free (syms);
3204 return count;
3205 }
3206 \f
3207 /* The following functions are specific to the ELF linker, while
3208 functions above are used generally. Those named ppc64_elf_* are
3209 called by the main ELF linker code. They appear in this file more
3210 or less in the order in which they are called. eg.
3211 ppc64_elf_check_relocs is called early in the link process,
3212 ppc64_elf_finish_dynamic_sections is one of the last functions
3213 called.
3214
3215 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3216 functions have both a function code symbol and a function descriptor
3217 symbol. A call to foo in a relocatable object file looks like:
3218
3219 . .text
3220 . x:
3221 . bl .foo
3222 . nop
3223
3224 The function definition in another object file might be:
3225
3226 . .section .opd
3227 . foo: .quad .foo
3228 . .quad .TOC.@tocbase
3229 . .quad 0
3230 .
3231 . .text
3232 . .foo: blr
3233
3234 When the linker resolves the call during a static link, the branch
3235 unsurprisingly just goes to .foo and the .opd information is unused.
3236 If the function definition is in a shared library, things are a little
3237 different: The call goes via a plt call stub, the opd information gets
3238 copied to the plt, and the linker patches the nop.
3239
3240 . x:
3241 . bl .foo_stub
3242 . ld 2,40(1)
3243 .
3244 .
3245 . .foo_stub:
3246 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3247 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3248 . std 2,40(1) # this is the general idea
3249 . ld 11,0(12)
3250 . ld 2,8(12)
3251 . mtctr 11
3252 . ld 11,16(12)
3253 . bctr
3254 .
3255 . .section .plt
3256 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3257
3258 The "reloc ()" notation is supposed to indicate that the linker emits
3259 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3260 copying.
3261
3262 What are the difficulties here? Well, firstly, the relocations
3263 examined by the linker in check_relocs are against the function code
3264 sym .foo, while the dynamic relocation in the plt is emitted against
3265 the function descriptor symbol, foo. Somewhere along the line, we need
3266 to carefully copy dynamic link information from one symbol to the other.
3267 Secondly, the generic part of the elf linker will make .foo a dynamic
3268 symbol as is normal for most other backends. We need foo dynamic
3269 instead, at least for an application final link. However, when
3270 creating a shared library containing foo, we need to have both symbols
3271 dynamic so that references to .foo are satisfied during the early
3272 stages of linking. Otherwise the linker might decide to pull in a
3273 definition from some other object, eg. a static library.
3274
3275 Update: As of August 2004, we support a new convention. Function
3276 calls may use the function descriptor symbol, ie. "bl foo". This
3277 behaves exactly as "bl .foo". */
3278
3279 /* The linker needs to keep track of the number of relocs that it
3280 decides to copy as dynamic relocs in check_relocs for each symbol.
3281 This is so that it can later discard them if they are found to be
3282 unnecessary. We store the information in a field extending the
3283 regular ELF linker hash table. */
3284
3285 struct ppc_dyn_relocs
3286 {
3287 struct ppc_dyn_relocs *next;
3288
3289 /* The input section of the reloc. */
3290 asection *sec;
3291
3292 /* Total number of relocs copied for the input section. */
3293 bfd_size_type count;
3294
3295 /* Number of pc-relative relocs copied for the input section. */
3296 bfd_size_type pc_count;
3297 };
3298
3299 /* Track GOT entries needed for a given symbol. We might need more
3300 than one got entry per symbol. */
3301 struct got_entry
3302 {
3303 struct got_entry *next;
3304
3305 /* The symbol addend that we'll be placing in the GOT. */
3306 bfd_vma addend;
3307
3308 /* Unlike other ELF targets, we use separate GOT entries for the same
3309 symbol referenced from different input files. This is to support
3310 automatic multiple TOC/GOT sections, where the TOC base can vary
3311 from one input file to another. FIXME: After group_sections we
3312 ought to merge entries within the group.
3313
3314 Point to the BFD owning this GOT entry. */
3315 bfd *owner;
3316
3317 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3318 TLS_TPREL or TLS_DTPREL for tls entries. */
3319 char tls_type;
3320
3321 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3322 union
3323 {
3324 bfd_signed_vma refcount;
3325 bfd_vma offset;
3326 } got;
3327 };
3328
3329 /* The same for PLT. */
3330 struct plt_entry
3331 {
3332 struct plt_entry *next;
3333
3334 bfd_vma addend;
3335
3336 union
3337 {
3338 bfd_signed_vma refcount;
3339 bfd_vma offset;
3340 } plt;
3341 };
3342
3343 /* Of those relocs that might be copied as dynamic relocs, this function
3344 selects those that must be copied when linking a shared library,
3345 even when the symbol is local. */
3346
3347 static int
3348 must_be_dyn_reloc (struct bfd_link_info *info,
3349 enum elf_ppc64_reloc_type r_type)
3350 {
3351 switch (r_type)
3352 {
3353 default:
3354 return 1;
3355
3356 case R_PPC64_REL32:
3357 case R_PPC64_REL64:
3358 case R_PPC64_REL30:
3359 return 0;
3360
3361 case R_PPC64_TPREL16:
3362 case R_PPC64_TPREL16_LO:
3363 case R_PPC64_TPREL16_HI:
3364 case R_PPC64_TPREL16_HA:
3365 case R_PPC64_TPREL16_DS:
3366 case R_PPC64_TPREL16_LO_DS:
3367 case R_PPC64_TPREL16_HIGHER:
3368 case R_PPC64_TPREL16_HIGHERA:
3369 case R_PPC64_TPREL16_HIGHEST:
3370 case R_PPC64_TPREL16_HIGHESTA:
3371 case R_PPC64_TPREL64:
3372 return !info->executable;
3373 }
3374 }
3375
3376 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3377 copying dynamic variables from a shared lib into an app's dynbss
3378 section, and instead use a dynamic relocation to point into the
3379 shared lib. With code that gcc generates, it's vital that this be
3380 enabled; In the PowerPC64 ABI, the address of a function is actually
3381 the address of a function descriptor, which resides in the .opd
3382 section. gcc uses the descriptor directly rather than going via the
3383 GOT as some other ABI's do, which means that initialized function
3384 pointers must reference the descriptor. Thus, a function pointer
3385 initialized to the address of a function in a shared library will
3386 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3387 redefines the function descriptor symbol to point to the copy. This
3388 presents a problem as a plt entry for that function is also
3389 initialized from the function descriptor symbol and the copy reloc
3390 may not be initialized first. */
3391 #define ELIMINATE_COPY_RELOCS 1
3392
3393 /* Section name for stubs is the associated section name plus this
3394 string. */
3395 #define STUB_SUFFIX ".stub"
3396
3397 /* Linker stubs.
3398 ppc_stub_long_branch:
3399 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3400 destination, but a 24 bit branch in a stub section will reach.
3401 . b dest
3402
3403 ppc_stub_plt_branch:
3404 Similar to the above, but a 24 bit branch in the stub section won't
3405 reach its destination.
3406 . addis %r12,%r2,xxx@toc@ha
3407 . ld %r11,xxx@toc@l(%r12)
3408 . mtctr %r11
3409 . bctr
3410
3411 ppc_stub_plt_call:
3412 Used to call a function in a shared library. If it so happens that
3413 the plt entry referenced crosses a 64k boundary, then an extra
3414 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3415 . addis %r12,%r2,xxx@toc@ha
3416 . std %r2,40(%r1)
3417 . ld %r11,xxx+0@toc@l(%r12)
3418 . mtctr %r11
3419 . ld %r2,xxx+8@toc@l(%r12)
3420 . ld %r11,xxx+16@toc@l(%r12)
3421 . bctr
3422
3423 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3424 code to adjust the value and save r2 to support multiple toc sections.
3425 A ppc_stub_long_branch with an r2 offset looks like:
3426 . std %r2,40(%r1)
3427 . addis %r2,%r2,off@ha
3428 . addi %r2,%r2,off@l
3429 . b dest
3430
3431 A ppc_stub_plt_branch with an r2 offset looks like:
3432 . std %r2,40(%r1)
3433 . addis %r12,%r2,xxx@toc@ha
3434 . ld %r11,xxx@toc@l(%r12)
3435 . addis %r2,%r2,off@ha
3436 . addi %r2,%r2,off@l
3437 . mtctr %r11
3438 . bctr
3439
3440 In cases where the "addis" instruction would add zero, the "addis" is
3441 omitted and following instructions modified slightly in some cases.
3442 */
3443
3444 enum ppc_stub_type {
3445 ppc_stub_none,
3446 ppc_stub_long_branch,
3447 ppc_stub_long_branch_r2off,
3448 ppc_stub_plt_branch,
3449 ppc_stub_plt_branch_r2off,
3450 ppc_stub_plt_call
3451 };
3452
3453 struct ppc_stub_hash_entry {
3454
3455 /* Base hash table entry structure. */
3456 struct bfd_hash_entry root;
3457
3458 enum ppc_stub_type stub_type;
3459
3460 /* The stub section. */
3461 asection *stub_sec;
3462
3463 /* Offset within stub_sec of the beginning of this stub. */
3464 bfd_vma stub_offset;
3465
3466 /* Given the symbol's value and its section we can determine its final
3467 value when building the stubs (so the stub knows where to jump. */
3468 bfd_vma target_value;
3469 asection *target_section;
3470
3471 /* The symbol table entry, if any, that this was derived from. */
3472 struct ppc_link_hash_entry *h;
3473
3474 /* And the reloc addend that this was derived from. */
3475 bfd_vma addend;
3476
3477 /* Where this stub is being called from, or, in the case of combined
3478 stub sections, the first input section in the group. */
3479 asection *id_sec;
3480 };
3481
3482 struct ppc_branch_hash_entry {
3483
3484 /* Base hash table entry structure. */
3485 struct bfd_hash_entry root;
3486
3487 /* Offset within branch lookup table. */
3488 unsigned int offset;
3489
3490 /* Generation marker. */
3491 unsigned int iter;
3492 };
3493
3494 struct ppc_link_hash_entry
3495 {
3496 struct elf_link_hash_entry elf;
3497
3498 union {
3499 /* A pointer to the most recently used stub hash entry against this
3500 symbol. */
3501 struct ppc_stub_hash_entry *stub_cache;
3502
3503 /* A pointer to the next symbol starting with a '.' */
3504 struct ppc_link_hash_entry *next_dot_sym;
3505 } u;
3506
3507 /* Track dynamic relocs copied for this symbol. */
3508 struct ppc_dyn_relocs *dyn_relocs;
3509
3510 /* Link between function code and descriptor symbols. */
3511 struct ppc_link_hash_entry *oh;
3512
3513 /* Flag function code and descriptor symbols. */
3514 unsigned int is_func:1;
3515 unsigned int is_func_descriptor:1;
3516 unsigned int fake:1;
3517
3518 /* Whether global opd/toc sym has been adjusted or not.
3519 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3520 should be set for all globals defined in any opd/toc section. */
3521 unsigned int adjust_done:1;
3522
3523 /* Set if we twiddled this symbol to weak at some stage. */
3524 unsigned int was_undefined:1;
3525
3526 /* Contexts in which symbol is used in the GOT (or TOC).
3527 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3528 corresponding relocs are encountered during check_relocs.
3529 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3530 indicate the corresponding GOT entry type is not needed.
3531 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3532 a TPREL one. We use a separate flag rather than setting TPREL
3533 just for convenience in distinguishing the two cases. */
3534 #define TLS_GD 1 /* GD reloc. */
3535 #define TLS_LD 2 /* LD reloc. */
3536 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3537 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3538 #define TLS_TLS 16 /* Any TLS reloc. */
3539 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3540 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3541 char tls_mask;
3542 };
3543
3544 /* ppc64 ELF linker hash table. */
3545
3546 struct ppc_link_hash_table
3547 {
3548 struct elf_link_hash_table elf;
3549
3550 /* The stub hash table. */
3551 struct bfd_hash_table stub_hash_table;
3552
3553 /* Another hash table for plt_branch stubs. */
3554 struct bfd_hash_table branch_hash_table;
3555
3556 /* Linker stub bfd. */
3557 bfd *stub_bfd;
3558
3559 /* Linker call-backs. */
3560 asection * (*add_stub_section) (const char *, asection *);
3561 void (*layout_sections_again) (void);
3562
3563 /* Array to keep track of which stub sections have been created, and
3564 information on stub grouping. */
3565 struct map_stub {
3566 /* This is the section to which stubs in the group will be attached. */
3567 asection *link_sec;
3568 /* The stub section. */
3569 asection *stub_sec;
3570 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3571 bfd_vma toc_off;
3572 } *stub_group;
3573
3574 /* Temp used when calculating TOC pointers. */
3575 bfd_vma toc_curr;
3576
3577 /* Highest input section id. */
3578 int top_id;
3579
3580 /* Highest output section index. */
3581 int top_index;
3582
3583 /* Used when adding symbols. */
3584 struct ppc_link_hash_entry *dot_syms;
3585
3586 /* List of input sections for each output section. */
3587 asection **input_list;
3588
3589 /* Short-cuts to get to dynamic linker sections. */
3590 asection *got;
3591 asection *plt;
3592 asection *relplt;
3593 asection *dynbss;
3594 asection *relbss;
3595 asection *glink;
3596 asection *sfpr;
3597 asection *brlt;
3598 asection *relbrlt;
3599
3600 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3601 struct ppc_link_hash_entry *tls_get_addr;
3602 struct ppc_link_hash_entry *tls_get_addr_fd;
3603
3604 /* Statistics. */
3605 unsigned long stub_count[ppc_stub_plt_call];
3606
3607 /* Number of stubs against global syms. */
3608 unsigned long stub_globals;
3609
3610 /* Set if we should emit symbols for stubs. */
3611 unsigned int emit_stub_syms:1;
3612
3613 /* Support for multiple toc sections. */
3614 unsigned int no_multi_toc:1;
3615 unsigned int multi_toc_needed:1;
3616
3617 /* Set on error. */
3618 unsigned int stub_error:1;
3619
3620 /* Temp used by ppc64_elf_check_directives. */
3621 unsigned int twiddled_syms:1;
3622
3623 /* Incremented every time we size stubs. */
3624 unsigned int stub_iteration;
3625
3626 /* Small local sym to section mapping cache. */
3627 struct sym_sec_cache sym_sec;
3628 };
3629
3630 /* Rename some of the generic section flags to better document how they
3631 are used here. */
3632 #define has_toc_reloc has_gp_reloc
3633 #define makes_toc_func_call need_finalize_relax
3634 #define call_check_in_progress reloc_done
3635
3636 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3637
3638 #define ppc_hash_table(p) \
3639 ((struct ppc_link_hash_table *) ((p)->hash))
3640
3641 #define ppc_stub_hash_lookup(table, string, create, copy) \
3642 ((struct ppc_stub_hash_entry *) \
3643 bfd_hash_lookup ((table), (string), (create), (copy)))
3644
3645 #define ppc_branch_hash_lookup(table, string, create, copy) \
3646 ((struct ppc_branch_hash_entry *) \
3647 bfd_hash_lookup ((table), (string), (create), (copy)))
3648
3649 /* Create an entry in the stub hash table. */
3650
3651 static struct bfd_hash_entry *
3652 stub_hash_newfunc (struct bfd_hash_entry *entry,
3653 struct bfd_hash_table *table,
3654 const char *string)
3655 {
3656 /* Allocate the structure if it has not already been allocated by a
3657 subclass. */
3658 if (entry == NULL)
3659 {
3660 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3661 if (entry == NULL)
3662 return entry;
3663 }
3664
3665 /* Call the allocation method of the superclass. */
3666 entry = bfd_hash_newfunc (entry, table, string);
3667 if (entry != NULL)
3668 {
3669 struct ppc_stub_hash_entry *eh;
3670
3671 /* Initialize the local fields. */
3672 eh = (struct ppc_stub_hash_entry *) entry;
3673 eh->stub_type = ppc_stub_none;
3674 eh->stub_sec = NULL;
3675 eh->stub_offset = 0;
3676 eh->target_value = 0;
3677 eh->target_section = NULL;
3678 eh->h = NULL;
3679 eh->id_sec = NULL;
3680 }
3681
3682 return entry;
3683 }
3684
3685 /* Create an entry in the branch hash table. */
3686
3687 static struct bfd_hash_entry *
3688 branch_hash_newfunc (struct bfd_hash_entry *entry,
3689 struct bfd_hash_table *table,
3690 const char *string)
3691 {
3692 /* Allocate the structure if it has not already been allocated by a
3693 subclass. */
3694 if (entry == NULL)
3695 {
3696 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3697 if (entry == NULL)
3698 return entry;
3699 }
3700
3701 /* Call the allocation method of the superclass. */
3702 entry = bfd_hash_newfunc (entry, table, string);
3703 if (entry != NULL)
3704 {
3705 struct ppc_branch_hash_entry *eh;
3706
3707 /* Initialize the local fields. */
3708 eh = (struct ppc_branch_hash_entry *) entry;
3709 eh->offset = 0;
3710 eh->iter = 0;
3711 }
3712
3713 return entry;
3714 }
3715
3716 /* Create an entry in a ppc64 ELF linker hash table. */
3717
3718 static struct bfd_hash_entry *
3719 link_hash_newfunc (struct bfd_hash_entry *entry,
3720 struct bfd_hash_table *table,
3721 const char *string)
3722 {
3723 /* Allocate the structure if it has not already been allocated by a
3724 subclass. */
3725 if (entry == NULL)
3726 {
3727 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3728 if (entry == NULL)
3729 return entry;
3730 }
3731
3732 /* Call the allocation method of the superclass. */
3733 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3734 if (entry != NULL)
3735 {
3736 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3737
3738 memset (&eh->u.stub_cache, 0,
3739 (sizeof (struct ppc_link_hash_entry)
3740 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3741
3742 /* When making function calls, old ABI code references function entry
3743 points (dot symbols), while new ABI code references the function
3744 descriptor symbol. We need to make any combination of reference and
3745 definition work together, without breaking archive linking.
3746
3747 For a defined function "foo" and an undefined call to "bar":
3748 An old object defines "foo" and ".foo", references ".bar" (possibly
3749 "bar" too).
3750 A new object defines "foo" and references "bar".
3751
3752 A new object thus has no problem with its undefined symbols being
3753 satisfied by definitions in an old object. On the other hand, the
3754 old object won't have ".bar" satisfied by a new object.
3755
3756 Keep a list of newly added dot-symbols. */
3757
3758 if (string[0] == '.')
3759 {
3760 struct ppc_link_hash_table *htab;
3761
3762 htab = (struct ppc_link_hash_table *) table;
3763 eh->u.next_dot_sym = htab->dot_syms;
3764 htab->dot_syms = eh;
3765 }
3766 }
3767
3768 return entry;
3769 }
3770
3771 /* Create a ppc64 ELF linker hash table. */
3772
3773 static struct bfd_link_hash_table *
3774 ppc64_elf_link_hash_table_create (bfd *abfd)
3775 {
3776 struct ppc_link_hash_table *htab;
3777 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3778
3779 htab = bfd_zmalloc (amt);
3780 if (htab == NULL)
3781 return NULL;
3782
3783 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3784 sizeof (struct ppc_link_hash_entry)))
3785 {
3786 free (htab);
3787 return NULL;
3788 }
3789
3790 /* Init the stub hash table too. */
3791 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3792 sizeof (struct ppc_stub_hash_entry)))
3793 return NULL;
3794
3795 /* And the branch hash table. */
3796 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3797 sizeof (struct ppc_branch_hash_entry)))
3798 return NULL;
3799
3800 /* Initializing two fields of the union is just cosmetic. We really
3801 only care about glist, but when compiled on a 32-bit host the
3802 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3803 debugger inspection of these fields look nicer. */
3804 htab->elf.init_got_refcount.refcount = 0;
3805 htab->elf.init_got_refcount.glist = NULL;
3806 htab->elf.init_plt_refcount.refcount = 0;
3807 htab->elf.init_plt_refcount.glist = NULL;
3808 htab->elf.init_got_offset.offset = 0;
3809 htab->elf.init_got_offset.glist = NULL;
3810 htab->elf.init_plt_offset.offset = 0;
3811 htab->elf.init_plt_offset.glist = NULL;
3812
3813 return &htab->elf.root;
3814 }
3815
3816 /* Free the derived linker hash table. */
3817
3818 static void
3819 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3820 {
3821 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3822
3823 bfd_hash_table_free (&ret->stub_hash_table);
3824 bfd_hash_table_free (&ret->branch_hash_table);
3825 _bfd_generic_link_hash_table_free (hash);
3826 }
3827
3828 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3829
3830 void
3831 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3832 {
3833 struct ppc_link_hash_table *htab;
3834
3835 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3836
3837 /* Always hook our dynamic sections into the first bfd, which is the
3838 linker created stub bfd. This ensures that the GOT header is at
3839 the start of the output TOC section. */
3840 htab = ppc_hash_table (info);
3841 htab->stub_bfd = abfd;
3842 htab->elf.dynobj = abfd;
3843 }
3844
3845 /* Build a name for an entry in the stub hash table. */
3846
3847 static char *
3848 ppc_stub_name (const asection *input_section,
3849 const asection *sym_sec,
3850 const struct ppc_link_hash_entry *h,
3851 const Elf_Internal_Rela *rel)
3852 {
3853 char *stub_name;
3854 bfd_size_type len;
3855
3856 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3857 offsets from a sym as a branch target? In fact, we could
3858 probably assume the addend is always zero. */
3859 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3860
3861 if (h)
3862 {
3863 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3864 stub_name = bfd_malloc (len);
3865 if (stub_name == NULL)
3866 return stub_name;
3867
3868 sprintf (stub_name, "%08x.%s+%x",
3869 input_section->id & 0xffffffff,
3870 h->elf.root.root.string,
3871 (int) rel->r_addend & 0xffffffff);
3872 }
3873 else
3874 {
3875 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3876 stub_name = bfd_malloc (len);
3877 if (stub_name == NULL)
3878 return stub_name;
3879
3880 sprintf (stub_name, "%08x.%x:%x+%x",
3881 input_section->id & 0xffffffff,
3882 sym_sec->id & 0xffffffff,
3883 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3884 (int) rel->r_addend & 0xffffffff);
3885 }
3886 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3887 stub_name[len - 2] = 0;
3888 return stub_name;
3889 }
3890
3891 /* Look up an entry in the stub hash. Stub entries are cached because
3892 creating the stub name takes a bit of time. */
3893
3894 static struct ppc_stub_hash_entry *
3895 ppc_get_stub_entry (const asection *input_section,
3896 const asection *sym_sec,
3897 struct ppc_link_hash_entry *h,
3898 const Elf_Internal_Rela *rel,
3899 struct ppc_link_hash_table *htab)
3900 {
3901 struct ppc_stub_hash_entry *stub_entry;
3902 const asection *id_sec;
3903
3904 /* If this input section is part of a group of sections sharing one
3905 stub section, then use the id of the first section in the group.
3906 Stub names need to include a section id, as there may well be
3907 more than one stub used to reach say, printf, and we need to
3908 distinguish between them. */
3909 id_sec = htab->stub_group[input_section->id].link_sec;
3910
3911 if (h != NULL && h->u.stub_cache != NULL
3912 && h->u.stub_cache->h == h
3913 && h->u.stub_cache->id_sec == id_sec)
3914 {
3915 stub_entry = h->u.stub_cache;
3916 }
3917 else
3918 {
3919 char *stub_name;
3920
3921 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3922 if (stub_name == NULL)
3923 return NULL;
3924
3925 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3926 stub_name, FALSE, FALSE);
3927 if (h != NULL)
3928 h->u.stub_cache = stub_entry;
3929
3930 free (stub_name);
3931 }
3932
3933 return stub_entry;
3934 }
3935
3936 /* Add a new stub entry to the stub hash. Not all fields of the new
3937 stub entry are initialised. */
3938
3939 static struct ppc_stub_hash_entry *
3940 ppc_add_stub (const char *stub_name,
3941 asection *section,
3942 struct ppc_link_hash_table *htab)
3943 {
3944 asection *link_sec;
3945 asection *stub_sec;
3946 struct ppc_stub_hash_entry *stub_entry;
3947
3948 link_sec = htab->stub_group[section->id].link_sec;
3949 stub_sec = htab->stub_group[section->id].stub_sec;
3950 if (stub_sec == NULL)
3951 {
3952 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3953 if (stub_sec == NULL)
3954 {
3955 size_t namelen;
3956 bfd_size_type len;
3957 char *s_name;
3958
3959 namelen = strlen (link_sec->name);
3960 len = namelen + sizeof (STUB_SUFFIX);
3961 s_name = bfd_alloc (htab->stub_bfd, len);
3962 if (s_name == NULL)
3963 return NULL;
3964
3965 memcpy (s_name, link_sec->name, namelen);
3966 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3967 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3968 if (stub_sec == NULL)
3969 return NULL;
3970 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3971 }
3972 htab->stub_group[section->id].stub_sec = stub_sec;
3973 }
3974
3975 /* Enter this entry into the linker stub hash table. */
3976 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3977 TRUE, FALSE);
3978 if (stub_entry == NULL)
3979 {
3980 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3981 section->owner, stub_name);
3982 return NULL;
3983 }
3984
3985 stub_entry->stub_sec = stub_sec;
3986 stub_entry->stub_offset = 0;
3987 stub_entry->id_sec = link_sec;
3988 return stub_entry;
3989 }
3990
3991 /* Create sections for linker generated code. */
3992
3993 static bfd_boolean
3994 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3995 {
3996 struct ppc_link_hash_table *htab;
3997 flagword flags;
3998
3999 htab = ppc_hash_table (info);
4000
4001 /* Create .sfpr for code to save and restore fp regs. */
4002 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4003 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4004 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4005 flags);
4006 if (htab->sfpr == NULL
4007 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4008 return FALSE;
4009
4010 /* Create .glink for lazy dynamic linking support. */
4011 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4012 flags);
4013 if (htab->glink == NULL
4014 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4015 return FALSE;
4016
4017 /* Create branch lookup table for plt_branch stubs. */
4018 flags = (SEC_ALLOC | SEC_LOAD
4019 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4020 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4021 flags);
4022 if (htab->brlt == NULL
4023 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4024 return FALSE;
4025
4026 if (!info->shared)
4027 return TRUE;
4028
4029 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4030 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4031 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4032 ".rela.branch_lt",
4033 flags);
4034 if (!htab->relbrlt
4035 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4036 return FALSE;
4037
4038 return TRUE;
4039 }
4040
4041 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4042 not already done. */
4043
4044 static bfd_boolean
4045 create_got_section (bfd *abfd, struct bfd_link_info *info)
4046 {
4047 asection *got, *relgot;
4048 flagword flags;
4049 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4050
4051 if (!is_ppc64_elf (abfd))
4052 return FALSE;
4053
4054 if (!htab->got)
4055 {
4056 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4057 return FALSE;
4058
4059 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4060 if (!htab->got)
4061 abort ();
4062 }
4063
4064 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4065 | SEC_LINKER_CREATED);
4066
4067 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4068 if (!got
4069 || !bfd_set_section_alignment (abfd, got, 3))
4070 return FALSE;
4071
4072 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4073 flags | SEC_READONLY);
4074 if (!relgot
4075 || ! bfd_set_section_alignment (abfd, relgot, 3))
4076 return FALSE;
4077
4078 ppc64_elf_tdata (abfd)->got = got;
4079 ppc64_elf_tdata (abfd)->relgot = relgot;
4080 return TRUE;
4081 }
4082
4083 /* Create the dynamic sections, and set up shortcuts. */
4084
4085 static bfd_boolean
4086 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4087 {
4088 struct ppc_link_hash_table *htab;
4089
4090 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4091 return FALSE;
4092
4093 htab = ppc_hash_table (info);
4094 if (!htab->got)
4095 htab->got = bfd_get_section_by_name (dynobj, ".got");
4096 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4097 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4098 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4099 if (!info->shared)
4100 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4101
4102 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4103 || (!info->shared && !htab->relbss))
4104 abort ();
4105
4106 return TRUE;
4107 }
4108
4109 /* Merge PLT info on FROM with that on TO. */
4110
4111 static void
4112 move_plt_plist (struct ppc_link_hash_entry *from,
4113 struct ppc_link_hash_entry *to)
4114 {
4115 if (from->elf.plt.plist != NULL)
4116 {
4117 if (to->elf.plt.plist != NULL)
4118 {
4119 struct plt_entry **entp;
4120 struct plt_entry *ent;
4121
4122 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4123 {
4124 struct plt_entry *dent;
4125
4126 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4127 if (dent->addend == ent->addend)
4128 {
4129 dent->plt.refcount += ent->plt.refcount;
4130 *entp = ent->next;
4131 break;
4132 }
4133 if (dent == NULL)
4134 entp = &ent->next;
4135 }
4136 *entp = to->elf.plt.plist;
4137 }
4138
4139 to->elf.plt.plist = from->elf.plt.plist;
4140 from->elf.plt.plist = NULL;
4141 }
4142 }
4143
4144 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4145
4146 static void
4147 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4148 struct elf_link_hash_entry *dir,
4149 struct elf_link_hash_entry *ind)
4150 {
4151 struct ppc_link_hash_entry *edir, *eind;
4152
4153 edir = (struct ppc_link_hash_entry *) dir;
4154 eind = (struct ppc_link_hash_entry *) ind;
4155
4156 /* Copy over any dynamic relocs we may have on the indirect sym. */
4157 if (eind->dyn_relocs != NULL)
4158 {
4159 if (edir->dyn_relocs != NULL)
4160 {
4161 struct ppc_dyn_relocs **pp;
4162 struct ppc_dyn_relocs *p;
4163
4164 /* Add reloc counts against the indirect sym to the direct sym
4165 list. Merge any entries against the same section. */
4166 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4167 {
4168 struct ppc_dyn_relocs *q;
4169
4170 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4171 if (q->sec == p->sec)
4172 {
4173 q->pc_count += p->pc_count;
4174 q->count += p->count;
4175 *pp = p->next;
4176 break;
4177 }
4178 if (q == NULL)
4179 pp = &p->next;
4180 }
4181 *pp = edir->dyn_relocs;
4182 }
4183
4184 edir->dyn_relocs = eind->dyn_relocs;
4185 eind->dyn_relocs = NULL;
4186 }
4187
4188 edir->is_func |= eind->is_func;
4189 edir->is_func_descriptor |= eind->is_func_descriptor;
4190 edir->tls_mask |= eind->tls_mask;
4191
4192 /* If called to transfer flags for a weakdef during processing
4193 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4194 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4195 if (!(ELIMINATE_COPY_RELOCS
4196 && eind->elf.root.type != bfd_link_hash_indirect
4197 && edir->elf.dynamic_adjusted))
4198 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4199
4200 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4201 edir->elf.ref_regular |= eind->elf.ref_regular;
4202 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4203 edir->elf.needs_plt |= eind->elf.needs_plt;
4204
4205 /* If we were called to copy over info for a weak sym, that's all. */
4206 if (eind->elf.root.type != bfd_link_hash_indirect)
4207 return;
4208
4209 /* Copy over got entries that we may have already seen to the
4210 symbol which just became indirect. */
4211 if (eind->elf.got.glist != NULL)
4212 {
4213 if (edir->elf.got.glist != NULL)
4214 {
4215 struct got_entry **entp;
4216 struct got_entry *ent;
4217
4218 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4219 {
4220 struct got_entry *dent;
4221
4222 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4223 if (dent->addend == ent->addend
4224 && dent->owner == ent->owner
4225 && dent->tls_type == ent->tls_type)
4226 {
4227 dent->got.refcount += ent->got.refcount;
4228 *entp = ent->next;
4229 break;
4230 }
4231 if (dent == NULL)
4232 entp = &ent->next;
4233 }
4234 *entp = edir->elf.got.glist;
4235 }
4236
4237 edir->elf.got.glist = eind->elf.got.glist;
4238 eind->elf.got.glist = NULL;
4239 }
4240
4241 /* And plt entries. */
4242 move_plt_plist (eind, edir);
4243
4244 if (eind->elf.dynindx != -1)
4245 {
4246 if (edir->elf.dynindx != -1)
4247 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4248 edir->elf.dynstr_index);
4249 edir->elf.dynindx = eind->elf.dynindx;
4250 edir->elf.dynstr_index = eind->elf.dynstr_index;
4251 eind->elf.dynindx = -1;
4252 eind->elf.dynstr_index = 0;
4253 }
4254 }
4255
4256 /* Find the function descriptor hash entry from the given function code
4257 hash entry FH. Link the entries via their OH fields. */
4258
4259 static struct ppc_link_hash_entry *
4260 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4261 {
4262 struct ppc_link_hash_entry *fdh = fh->oh;
4263
4264 if (fdh == NULL)
4265 {
4266 const char *fd_name = fh->elf.root.root.string + 1;
4267
4268 fdh = (struct ppc_link_hash_entry *)
4269 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4270 if (fdh != NULL)
4271 {
4272 fdh->is_func_descriptor = 1;
4273 fdh->oh = fh;
4274 fh->is_func = 1;
4275 fh->oh = fdh;
4276 }
4277 }
4278
4279 return fdh;
4280 }
4281
4282 /* Make a fake function descriptor sym for the code sym FH. */
4283
4284 static struct ppc_link_hash_entry *
4285 make_fdh (struct bfd_link_info *info,
4286 struct ppc_link_hash_entry *fh)
4287 {
4288 bfd *abfd;
4289 asymbol *newsym;
4290 struct bfd_link_hash_entry *bh;
4291 struct ppc_link_hash_entry *fdh;
4292
4293 abfd = fh->elf.root.u.undef.abfd;
4294 newsym = bfd_make_empty_symbol (abfd);
4295 newsym->name = fh->elf.root.root.string + 1;
4296 newsym->section = bfd_und_section_ptr;
4297 newsym->value = 0;
4298 newsym->flags = BSF_WEAK;
4299
4300 bh = NULL;
4301 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4302 newsym->flags, newsym->section,
4303 newsym->value, NULL, FALSE, FALSE,
4304 &bh))
4305 return NULL;
4306
4307 fdh = (struct ppc_link_hash_entry *) bh;
4308 fdh->elf.non_elf = 0;
4309 fdh->fake = 1;
4310 fdh->is_func_descriptor = 1;
4311 fdh->oh = fh;
4312 fh->is_func = 1;
4313 fh->oh = fdh;
4314 return fdh;
4315 }
4316
4317 /* Fix function descriptor symbols defined in .opd sections to be
4318 function type. */
4319
4320 static bfd_boolean
4321 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4322 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4323 Elf_Internal_Sym *isym,
4324 const char **name ATTRIBUTE_UNUSED,
4325 flagword *flags ATTRIBUTE_UNUSED,
4326 asection **sec,
4327 bfd_vma *value ATTRIBUTE_UNUSED)
4328 {
4329 if (*sec != NULL
4330 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4331 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4332
4333 return TRUE;
4334 }
4335
4336 /* This function makes an old ABI object reference to ".bar" cause the
4337 inclusion of a new ABI object archive that defines "bar".
4338 NAME is a symbol defined in an archive. Return a symbol in the hash
4339 table that might be satisfied by the archive symbols. */
4340
4341 static struct elf_link_hash_entry *
4342 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4343 struct bfd_link_info *info,
4344 const char *name)
4345 {
4346 struct elf_link_hash_entry *h;
4347 char *dot_name;
4348 size_t len;
4349
4350 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4351 if (h != NULL
4352 /* Don't return this sym if it is a fake function descriptor
4353 created by add_symbol_adjust. */
4354 && !(h->root.type == bfd_link_hash_undefweak
4355 && ((struct ppc_link_hash_entry *) h)->fake))
4356 return h;
4357
4358 if (name[0] == '.')
4359 return h;
4360
4361 len = strlen (name);
4362 dot_name = bfd_alloc (abfd, len + 2);
4363 if (dot_name == NULL)
4364 return (struct elf_link_hash_entry *) 0 - 1;
4365 dot_name[0] = '.';
4366 memcpy (dot_name + 1, name, len + 1);
4367 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4368 bfd_release (abfd, dot_name);
4369 return h;
4370 }
4371
4372 /* This function satisfies all old ABI object references to ".bar" if a
4373 new ABI object defines "bar". Well, at least, undefined dot symbols
4374 are made weak. This stops later archive searches from including an
4375 object if we already have a function descriptor definition. It also
4376 prevents the linker complaining about undefined symbols.
4377 We also check and correct mismatched symbol visibility here. The
4378 most restrictive visibility of the function descriptor and the
4379 function entry symbol is used. */
4380
4381 static bfd_boolean
4382 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4383 {
4384 struct ppc_link_hash_table *htab;
4385 struct ppc_link_hash_entry *fdh;
4386
4387 if (eh->elf.root.type == bfd_link_hash_indirect)
4388 return TRUE;
4389
4390 if (eh->elf.root.type == bfd_link_hash_warning)
4391 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4392
4393 if (eh->elf.root.root.string[0] != '.')
4394 abort ();
4395
4396 htab = ppc_hash_table (info);
4397 fdh = get_fdh (eh, htab);
4398 if (fdh == NULL
4399 && !info->relocatable
4400 && (eh->elf.root.type == bfd_link_hash_undefined
4401 || eh->elf.root.type == bfd_link_hash_undefweak)
4402 && eh->elf.ref_regular)
4403 {
4404 /* Make an undefweak function descriptor sym, which is enough to
4405 pull in an --as-needed shared lib, but won't cause link
4406 errors. Archives are handled elsewhere. */
4407 fdh = make_fdh (info, eh);
4408 if (fdh == NULL)
4409 return FALSE;
4410 else
4411 fdh->elf.ref_regular = 1;
4412 }
4413 else if (fdh != NULL)
4414 {
4415 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4416 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4417 if (entry_vis < descr_vis)
4418 fdh->elf.other += entry_vis - descr_vis;
4419 else if (entry_vis > descr_vis)
4420 eh->elf.other += descr_vis - entry_vis;
4421
4422 if ((fdh->elf.root.type == bfd_link_hash_defined
4423 || fdh->elf.root.type == bfd_link_hash_defweak)
4424 && eh->elf.root.type == bfd_link_hash_undefined)
4425 {
4426 eh->elf.root.type = bfd_link_hash_undefweak;
4427 eh->was_undefined = 1;
4428 htab->twiddled_syms = 1;
4429 }
4430 }
4431
4432 return TRUE;
4433 }
4434
4435 /* Process list of dot-symbols we made in link_hash_newfunc. */
4436
4437 static bfd_boolean
4438 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4439 {
4440 struct ppc_link_hash_table *htab;
4441 struct ppc_link_hash_entry **p, *eh;
4442
4443 htab = ppc_hash_table (info);
4444 if (!is_ppc64_elf (info->output_bfd))
4445 return TRUE;
4446
4447 if (is_ppc64_elf (ibfd))
4448 {
4449 p = &htab->dot_syms;
4450 while ((eh = *p) != NULL)
4451 {
4452 *p = NULL;
4453 if (!add_symbol_adjust (eh, info))
4454 return FALSE;
4455 p = &eh->u.next_dot_sym;
4456 }
4457 }
4458
4459 /* Clear the list for non-ppc64 input files. */
4460 p = &htab->dot_syms;
4461 while ((eh = *p) != NULL)
4462 {
4463 *p = NULL;
4464 p = &eh->u.next_dot_sym;
4465 }
4466
4467 /* We need to fix the undefs list for any syms we have twiddled to
4468 undef_weak. */
4469 if (htab->twiddled_syms)
4470 {
4471 bfd_link_repair_undef_list (&htab->elf.root);
4472 htab->twiddled_syms = 0;
4473 }
4474 return TRUE;
4475 }
4476
4477 /* Undo hash table changes when an --as-needed input file is determined
4478 not to be needed. */
4479
4480 static bfd_boolean
4481 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4482 struct bfd_link_info *info)
4483 {
4484 ppc_hash_table (info)->dot_syms = NULL;
4485 return TRUE;
4486 }
4487
4488 static bfd_boolean
4489 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4490 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4491 {
4492 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4493 char *local_got_tls_masks;
4494
4495 if (local_got_ents == NULL)
4496 {
4497 bfd_size_type size = symtab_hdr->sh_info;
4498
4499 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4500 local_got_ents = bfd_zalloc (abfd, size);
4501 if (local_got_ents == NULL)
4502 return FALSE;
4503 elf_local_got_ents (abfd) = local_got_ents;
4504 }
4505
4506 if ((tls_type & TLS_EXPLICIT) == 0)
4507 {
4508 struct got_entry *ent;
4509
4510 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4511 if (ent->addend == r_addend
4512 && ent->owner == abfd
4513 && ent->tls_type == tls_type)
4514 break;
4515 if (ent == NULL)
4516 {
4517 bfd_size_type amt = sizeof (*ent);
4518 ent = bfd_alloc (abfd, amt);
4519 if (ent == NULL)
4520 return FALSE;
4521 ent->next = local_got_ents[r_symndx];
4522 ent->addend = r_addend;
4523 ent->owner = abfd;
4524 ent->tls_type = tls_type;
4525 ent->got.refcount = 0;
4526 local_got_ents[r_symndx] = ent;
4527 }
4528 ent->got.refcount += 1;
4529 }
4530
4531 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4532 local_got_tls_masks[r_symndx] |= tls_type;
4533 return TRUE;
4534 }
4535
4536 static bfd_boolean
4537 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4538 {
4539 struct plt_entry *ent;
4540
4541 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4542 if (ent->addend == addend)
4543 break;
4544 if (ent == NULL)
4545 {
4546 bfd_size_type amt = sizeof (*ent);
4547 ent = bfd_alloc (abfd, amt);
4548 if (ent == NULL)
4549 return FALSE;
4550 ent->next = eh->elf.plt.plist;
4551 ent->addend = addend;
4552 ent->plt.refcount = 0;
4553 eh->elf.plt.plist = ent;
4554 }
4555 ent->plt.refcount += 1;
4556 eh->elf.needs_plt = 1;
4557 if (eh->elf.root.root.string[0] == '.'
4558 && eh->elf.root.root.string[1] != '\0')
4559 eh->is_func = 1;
4560 return TRUE;
4561 }
4562
4563 /* Look through the relocs for a section during the first phase, and
4564 calculate needed space in the global offset table, procedure
4565 linkage table, and dynamic reloc sections. */
4566
4567 static bfd_boolean
4568 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4569 asection *sec, const Elf_Internal_Rela *relocs)
4570 {
4571 struct ppc_link_hash_table *htab;
4572 Elf_Internal_Shdr *symtab_hdr;
4573 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4574 const Elf_Internal_Rela *rel;
4575 const Elf_Internal_Rela *rel_end;
4576 asection *sreloc;
4577 asection **opd_sym_map;
4578
4579 if (info->relocatable)
4580 return TRUE;
4581
4582 /* Don't do anything special with non-loaded, non-alloced sections.
4583 In particular, any relocs in such sections should not affect GOT
4584 and PLT reference counting (ie. we don't allow them to create GOT
4585 or PLT entries), there's no possibility or desire to optimize TLS
4586 relocs, and there's not much point in propagating relocs to shared
4587 libs that the dynamic linker won't relocate. */
4588 if ((sec->flags & SEC_ALLOC) == 0)
4589 return TRUE;
4590
4591 BFD_ASSERT (is_ppc64_elf (abfd));
4592
4593 htab = ppc_hash_table (info);
4594 symtab_hdr = &elf_symtab_hdr (abfd);
4595
4596 sym_hashes = elf_sym_hashes (abfd);
4597 sym_hashes_end = (sym_hashes
4598 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4599 - symtab_hdr->sh_info);
4600
4601 sreloc = NULL;
4602 opd_sym_map = NULL;
4603 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4604 {
4605 /* Garbage collection needs some extra help with .opd sections.
4606 We don't want to necessarily keep everything referenced by
4607 relocs in .opd, as that would keep all functions. Instead,
4608 if we reference an .opd symbol (a function descriptor), we
4609 want to keep the function code symbol's section. This is
4610 easy for global symbols, but for local syms we need to keep
4611 information about the associated function section. */
4612 bfd_size_type amt;
4613
4614 amt = sec->size * sizeof (*opd_sym_map) / 8;
4615 opd_sym_map = bfd_zalloc (abfd, amt);
4616 if (opd_sym_map == NULL)
4617 return FALSE;
4618 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4619 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4620 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4621 }
4622
4623 if (htab->sfpr == NULL
4624 && !create_linkage_sections (htab->elf.dynobj, info))
4625 return FALSE;
4626
4627 rel_end = relocs + sec->reloc_count;
4628 for (rel = relocs; rel < rel_end; rel++)
4629 {
4630 unsigned long r_symndx;
4631 struct elf_link_hash_entry *h;
4632 enum elf_ppc64_reloc_type r_type;
4633 int tls_type = 0;
4634 struct _ppc64_elf_section_data *ppc64_sec;
4635
4636 r_symndx = ELF64_R_SYM (rel->r_info);
4637 if (r_symndx < symtab_hdr->sh_info)
4638 h = NULL;
4639 else
4640 {
4641 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4642 while (h->root.type == bfd_link_hash_indirect
4643 || h->root.type == bfd_link_hash_warning)
4644 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4645 }
4646
4647 r_type = ELF64_R_TYPE (rel->r_info);
4648 switch (r_type)
4649 {
4650 case R_PPC64_GOT_TLSLD16:
4651 case R_PPC64_GOT_TLSLD16_LO:
4652 case R_PPC64_GOT_TLSLD16_HI:
4653 case R_PPC64_GOT_TLSLD16_HA:
4654 tls_type = TLS_TLS | TLS_LD;
4655 goto dogottls;
4656
4657 case R_PPC64_GOT_TLSGD16:
4658 case R_PPC64_GOT_TLSGD16_LO:
4659 case R_PPC64_GOT_TLSGD16_HI:
4660 case R_PPC64_GOT_TLSGD16_HA:
4661 tls_type = TLS_TLS | TLS_GD;
4662 goto dogottls;
4663
4664 case R_PPC64_GOT_TPREL16_DS:
4665 case R_PPC64_GOT_TPREL16_LO_DS:
4666 case R_PPC64_GOT_TPREL16_HI:
4667 case R_PPC64_GOT_TPREL16_HA:
4668 if (!info->executable)
4669 info->flags |= DF_STATIC_TLS;
4670 tls_type = TLS_TLS | TLS_TPREL;
4671 goto dogottls;
4672
4673 case R_PPC64_GOT_DTPREL16_DS:
4674 case R_PPC64_GOT_DTPREL16_LO_DS:
4675 case R_PPC64_GOT_DTPREL16_HI:
4676 case R_PPC64_GOT_DTPREL16_HA:
4677 tls_type = TLS_TLS | TLS_DTPREL;
4678 dogottls:
4679 sec->has_tls_reloc = 1;
4680 /* Fall thru */
4681
4682 case R_PPC64_GOT16:
4683 case R_PPC64_GOT16_DS:
4684 case R_PPC64_GOT16_HA:
4685 case R_PPC64_GOT16_HI:
4686 case R_PPC64_GOT16_LO:
4687 case R_PPC64_GOT16_LO_DS:
4688 /* This symbol requires a global offset table entry. */
4689 sec->has_toc_reloc = 1;
4690 if (ppc64_elf_tdata (abfd)->got == NULL
4691 && !create_got_section (abfd, info))
4692 return FALSE;
4693
4694 if (h != NULL)
4695 {
4696 struct ppc_link_hash_entry *eh;
4697 struct got_entry *ent;
4698
4699 eh = (struct ppc_link_hash_entry *) h;
4700 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4701 if (ent->addend == rel->r_addend
4702 && ent->owner == abfd
4703 && ent->tls_type == tls_type)
4704 break;
4705 if (ent == NULL)
4706 {
4707 bfd_size_type amt = sizeof (*ent);
4708 ent = bfd_alloc (abfd, amt);
4709 if (ent == NULL)
4710 return FALSE;
4711 ent->next = eh->elf.got.glist;
4712 ent->addend = rel->r_addend;
4713 ent->owner = abfd;
4714 ent->tls_type = tls_type;
4715 ent->got.refcount = 0;
4716 eh->elf.got.glist = ent;
4717 }
4718 ent->got.refcount += 1;
4719 eh->tls_mask |= tls_type;
4720 }
4721 else
4722 /* This is a global offset table entry for a local symbol. */
4723 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4724 rel->r_addend, tls_type))
4725 return FALSE;
4726 break;
4727
4728 case R_PPC64_PLT16_HA:
4729 case R_PPC64_PLT16_HI:
4730 case R_PPC64_PLT16_LO:
4731 case R_PPC64_PLT32:
4732 case R_PPC64_PLT64:
4733 /* This symbol requires a procedure linkage table entry. We
4734 actually build the entry in adjust_dynamic_symbol,
4735 because this might be a case of linking PIC code without
4736 linking in any dynamic objects, in which case we don't
4737 need to generate a procedure linkage table after all. */
4738 if (h == NULL)
4739 {
4740 /* It does not make sense to have a procedure linkage
4741 table entry for a local symbol. */
4742 bfd_set_error (bfd_error_bad_value);
4743 return FALSE;
4744 }
4745 else
4746 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4747 rel->r_addend))
4748 return FALSE;
4749 break;
4750
4751 /* The following relocations don't need to propagate the
4752 relocation if linking a shared object since they are
4753 section relative. */
4754 case R_PPC64_SECTOFF:
4755 case R_PPC64_SECTOFF_LO:
4756 case R_PPC64_SECTOFF_HI:
4757 case R_PPC64_SECTOFF_HA:
4758 case R_PPC64_SECTOFF_DS:
4759 case R_PPC64_SECTOFF_LO_DS:
4760 case R_PPC64_DTPREL16:
4761 case R_PPC64_DTPREL16_LO:
4762 case R_PPC64_DTPREL16_HI:
4763 case R_PPC64_DTPREL16_HA:
4764 case R_PPC64_DTPREL16_DS:
4765 case R_PPC64_DTPREL16_LO_DS:
4766 case R_PPC64_DTPREL16_HIGHER:
4767 case R_PPC64_DTPREL16_HIGHERA:
4768 case R_PPC64_DTPREL16_HIGHEST:
4769 case R_PPC64_DTPREL16_HIGHESTA:
4770 break;
4771
4772 /* Nor do these. */
4773 case R_PPC64_TOC16:
4774 case R_PPC64_TOC16_LO:
4775 case R_PPC64_TOC16_HI:
4776 case R_PPC64_TOC16_HA:
4777 case R_PPC64_TOC16_DS:
4778 case R_PPC64_TOC16_LO_DS:
4779 sec->has_toc_reloc = 1;
4780 break;
4781
4782 /* This relocation describes the C++ object vtable hierarchy.
4783 Reconstruct it for later use during GC. */
4784 case R_PPC64_GNU_VTINHERIT:
4785 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4786 return FALSE;
4787 break;
4788
4789 /* This relocation describes which C++ vtable entries are actually
4790 used. Record for later use during GC. */
4791 case R_PPC64_GNU_VTENTRY:
4792 BFD_ASSERT (h != NULL);
4793 if (h != NULL
4794 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4795 return FALSE;
4796 break;
4797
4798 case R_PPC64_REL14:
4799 case R_PPC64_REL14_BRTAKEN:
4800 case R_PPC64_REL14_BRNTAKEN:
4801 {
4802 asection *dest = NULL;
4803
4804 /* Heuristic: If jumping outside our section, chances are
4805 we are going to need a stub. */
4806 if (h != NULL)
4807 {
4808 /* If the sym is weak it may be overridden later, so
4809 don't assume we know where a weak sym lives. */
4810 if (h->root.type == bfd_link_hash_defined)
4811 dest = h->root.u.def.section;
4812 }
4813 else
4814 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4815 sec, r_symndx);
4816 if (dest != sec)
4817 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4818 }
4819 /* Fall through. */
4820
4821 case R_PPC64_REL24:
4822 if (h != NULL)
4823 {
4824 /* We may need a .plt entry if the function this reloc
4825 refers to is in a shared lib. */
4826 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4827 rel->r_addend))
4828 return FALSE;
4829 if (h == &htab->tls_get_addr->elf
4830 || h == &htab->tls_get_addr_fd->elf)
4831 sec->has_tls_reloc = 1;
4832 else if (htab->tls_get_addr == NULL
4833 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4834 && (h->root.root.string[15] == 0
4835 || h->root.root.string[15] == '@'))
4836 {
4837 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4838 sec->has_tls_reloc = 1;
4839 }
4840 else if (htab->tls_get_addr_fd == NULL
4841 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4842 && (h->root.root.string[14] == 0
4843 || h->root.root.string[14] == '@'))
4844 {
4845 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4846 sec->has_tls_reloc = 1;
4847 }
4848 }
4849 break;
4850
4851 case R_PPC64_TPREL64:
4852 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4853 if (!info->executable)
4854 info->flags |= DF_STATIC_TLS;
4855 goto dotlstoc;
4856
4857 case R_PPC64_DTPMOD64:
4858 if (rel + 1 < rel_end
4859 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4860 && rel[1].r_offset == rel->r_offset + 8)
4861 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4862 else
4863 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4864 goto dotlstoc;
4865
4866 case R_PPC64_DTPREL64:
4867 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4868 if (rel != relocs
4869 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4870 && rel[-1].r_offset == rel->r_offset - 8)
4871 /* This is the second reloc of a dtpmod, dtprel pair.
4872 Don't mark with TLS_DTPREL. */
4873 goto dodyn;
4874
4875 dotlstoc:
4876 sec->has_tls_reloc = 1;
4877 if (h != NULL)
4878 {
4879 struct ppc_link_hash_entry *eh;
4880 eh = (struct ppc_link_hash_entry *) h;
4881 eh->tls_mask |= tls_type;
4882 }
4883 else
4884 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4885 rel->r_addend, tls_type))
4886 return FALSE;
4887
4888 ppc64_sec = ppc64_elf_section_data (sec);
4889 if (ppc64_sec->sec_type != sec_toc)
4890 {
4891 /* One extra to simplify get_tls_mask. */
4892 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4893 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4894 if (ppc64_sec->u.t_symndx == NULL)
4895 return FALSE;
4896 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4897 ppc64_sec->sec_type = sec_toc;
4898 }
4899 BFD_ASSERT (rel->r_offset % 8 == 0);
4900 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4901
4902 /* Mark the second slot of a GD or LD entry.
4903 -1 to indicate GD and -2 to indicate LD. */
4904 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4905 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4906 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4907 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4908 goto dodyn;
4909
4910 case R_PPC64_TPREL16:
4911 case R_PPC64_TPREL16_LO:
4912 case R_PPC64_TPREL16_HI:
4913 case R_PPC64_TPREL16_HA:
4914 case R_PPC64_TPREL16_DS:
4915 case R_PPC64_TPREL16_LO_DS:
4916 case R_PPC64_TPREL16_HIGHER:
4917 case R_PPC64_TPREL16_HIGHERA:
4918 case R_PPC64_TPREL16_HIGHEST:
4919 case R_PPC64_TPREL16_HIGHESTA:
4920 if (info->shared)
4921 {
4922 if (!info->executable)
4923 info->flags |= DF_STATIC_TLS;
4924 goto dodyn;
4925 }
4926 break;
4927
4928 case R_PPC64_ADDR64:
4929 if (opd_sym_map != NULL
4930 && rel + 1 < rel_end
4931 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4932 {
4933 if (h != NULL)
4934 {
4935 if (h->root.root.string[0] == '.'
4936 && h->root.root.string[1] != 0
4937 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4938 ;
4939 else
4940 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4941 }
4942 else
4943 {
4944 asection *s;
4945
4946 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4947 r_symndx);
4948 if (s == NULL)
4949 return FALSE;
4950 else if (s != sec)
4951 opd_sym_map[rel->r_offset / 8] = s;
4952 }
4953 }
4954 /* Fall through. */
4955
4956 case R_PPC64_REL30:
4957 case R_PPC64_REL32:
4958 case R_PPC64_REL64:
4959 case R_PPC64_ADDR14:
4960 case R_PPC64_ADDR14_BRNTAKEN:
4961 case R_PPC64_ADDR14_BRTAKEN:
4962 case R_PPC64_ADDR16:
4963 case R_PPC64_ADDR16_DS:
4964 case R_PPC64_ADDR16_HA:
4965 case R_PPC64_ADDR16_HI:
4966 case R_PPC64_ADDR16_HIGHER:
4967 case R_PPC64_ADDR16_HIGHERA:
4968 case R_PPC64_ADDR16_HIGHEST:
4969 case R_PPC64_ADDR16_HIGHESTA:
4970 case R_PPC64_ADDR16_LO:
4971 case R_PPC64_ADDR16_LO_DS:
4972 case R_PPC64_ADDR24:
4973 case R_PPC64_ADDR32:
4974 case R_PPC64_UADDR16:
4975 case R_PPC64_UADDR32:
4976 case R_PPC64_UADDR64:
4977 case R_PPC64_TOC:
4978 if (h != NULL && !info->shared)
4979 /* We may need a copy reloc. */
4980 h->non_got_ref = 1;
4981
4982 /* Don't propagate .opd relocs. */
4983 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4984 break;
4985
4986 /* If we are creating a shared library, and this is a reloc
4987 against a global symbol, or a non PC relative reloc
4988 against a local symbol, then we need to copy the reloc
4989 into the shared library. However, if we are linking with
4990 -Bsymbolic, we do not need to copy a reloc against a
4991 global symbol which is defined in an object we are
4992 including in the link (i.e., DEF_REGULAR is set). At
4993 this point we have not seen all the input files, so it is
4994 possible that DEF_REGULAR is not set now but will be set
4995 later (it is never cleared). In case of a weak definition,
4996 DEF_REGULAR may be cleared later by a strong definition in
4997 a shared library. We account for that possibility below by
4998 storing information in the dyn_relocs field of the hash
4999 table entry. A similar situation occurs when creating
5000 shared libraries and symbol visibility changes render the
5001 symbol local.
5002
5003 If on the other hand, we are creating an executable, we
5004 may need to keep relocations for symbols satisfied by a
5005 dynamic library if we manage to avoid copy relocs for the
5006 symbol. */
5007 dodyn:
5008 if ((info->shared
5009 && (must_be_dyn_reloc (info, r_type)
5010 || (h != NULL
5011 && (! info->symbolic
5012 || h->root.type == bfd_link_hash_defweak
5013 || !h->def_regular))))
5014 || (ELIMINATE_COPY_RELOCS
5015 && !info->shared
5016 && h != NULL
5017 && (h->root.type == bfd_link_hash_defweak
5018 || !h->def_regular)))
5019 {
5020 struct ppc_dyn_relocs *p;
5021 struct ppc_dyn_relocs **head;
5022
5023 /* We must copy these reloc types into the output file.
5024 Create a reloc section in dynobj and make room for
5025 this reloc. */
5026 if (sreloc == NULL)
5027 {
5028 const char *name;
5029 bfd *dynobj;
5030
5031 name = (bfd_elf_string_from_elf_section
5032 (abfd,
5033 elf_elfheader (abfd)->e_shstrndx,
5034 elf_section_data (sec)->rel_hdr.sh_name));
5035 if (name == NULL)
5036 return FALSE;
5037
5038 if (! CONST_STRNEQ (name, ".rela")
5039 || strcmp (bfd_get_section_name (abfd, sec),
5040 name + 5) != 0)
5041 {
5042 (*_bfd_error_handler)
5043 (_("%B: bad relocation section name `%s\'"),
5044 abfd, name);
5045 bfd_set_error (bfd_error_bad_value);
5046 }
5047
5048 dynobj = htab->elf.dynobj;
5049 sreloc = bfd_get_section_by_name (dynobj, name);
5050 if (sreloc == NULL)
5051 {
5052 flagword flags;
5053
5054 flags = (SEC_HAS_CONTENTS | SEC_READONLY
5055 | SEC_IN_MEMORY | SEC_LINKER_CREATED
5056 | SEC_ALLOC | SEC_LOAD);
5057 sreloc = bfd_make_section_with_flags (dynobj,
5058 name,
5059 flags);
5060 if (sreloc == NULL
5061 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
5062 return FALSE;
5063 }
5064 elf_section_data (sec)->sreloc = sreloc;
5065 }
5066
5067 /* If this is a global symbol, we count the number of
5068 relocations we need for this symbol. */
5069 if (h != NULL)
5070 {
5071 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5072 }
5073 else
5074 {
5075 /* Track dynamic relocs needed for local syms too.
5076 We really need local syms available to do this
5077 easily. Oh well. */
5078
5079 asection *s;
5080 void *vpp;
5081
5082 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
5083 sec, r_symndx);
5084 if (s == NULL)
5085 return FALSE;
5086
5087 vpp = &elf_section_data (s)->local_dynrel;
5088 head = (struct ppc_dyn_relocs **) vpp;
5089 }
5090
5091 p = *head;
5092 if (p == NULL || p->sec != sec)
5093 {
5094 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5095 if (p == NULL)
5096 return FALSE;
5097 p->next = *head;
5098 *head = p;
5099 p->sec = sec;
5100 p->count = 0;
5101 p->pc_count = 0;
5102 }
5103
5104 p->count += 1;
5105 if (!must_be_dyn_reloc (info, r_type))
5106 p->pc_count += 1;
5107 }
5108 break;
5109
5110 default:
5111 break;
5112 }
5113 }
5114
5115 return TRUE;
5116 }
5117
5118 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5119 of the code entry point, and its section. */
5120
5121 static bfd_vma
5122 opd_entry_value (asection *opd_sec,
5123 bfd_vma offset,
5124 asection **code_sec,
5125 bfd_vma *code_off)
5126 {
5127 bfd *opd_bfd = opd_sec->owner;
5128 Elf_Internal_Rela *relocs;
5129 Elf_Internal_Rela *lo, *hi, *look;
5130 bfd_vma val;
5131
5132 /* No relocs implies we are linking a --just-symbols object. */
5133 if (opd_sec->reloc_count == 0)
5134 {
5135 bfd_vma val;
5136
5137 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5138 return (bfd_vma) -1;
5139
5140 if (code_sec != NULL)
5141 {
5142 asection *sec, *likely = NULL;
5143 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5144 if (sec->vma <= val
5145 && (sec->flags & SEC_LOAD) != 0
5146 && (sec->flags & SEC_ALLOC) != 0)
5147 likely = sec;
5148 if (likely != NULL)
5149 {
5150 *code_sec = likely;
5151 if (code_off != NULL)
5152 *code_off = val - likely->vma;
5153 }
5154 }
5155 return val;
5156 }
5157
5158 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5159
5160 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5161 if (relocs == NULL)
5162 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5163
5164 /* Go find the opd reloc at the sym address. */
5165 lo = relocs;
5166 BFD_ASSERT (lo != NULL);
5167 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5168 val = (bfd_vma) -1;
5169 while (lo < hi)
5170 {
5171 look = lo + (hi - lo) / 2;
5172 if (look->r_offset < offset)
5173 lo = look + 1;
5174 else if (look->r_offset > offset)
5175 hi = look;
5176 else
5177 {
5178 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5179
5180 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5181 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5182 {
5183 unsigned long symndx = ELF64_R_SYM (look->r_info);
5184 asection *sec;
5185
5186 if (symndx < symtab_hdr->sh_info)
5187 {
5188 Elf_Internal_Sym *sym;
5189
5190 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5191 if (sym == NULL)
5192 {
5193 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5194 symtab_hdr->sh_info,
5195 0, NULL, NULL, NULL);
5196 if (sym == NULL)
5197 break;
5198 symtab_hdr->contents = (bfd_byte *) sym;
5199 }
5200
5201 sym += symndx;
5202 val = sym->st_value;
5203 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5204 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5205 }
5206 else
5207 {
5208 struct elf_link_hash_entry **sym_hashes;
5209 struct elf_link_hash_entry *rh;
5210
5211 sym_hashes = elf_sym_hashes (opd_bfd);
5212 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5213 while (rh->root.type == bfd_link_hash_indirect
5214 || rh->root.type == bfd_link_hash_warning)
5215 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5216 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5217 || rh->root.type == bfd_link_hash_defweak);
5218 val = rh->root.u.def.value;
5219 sec = rh->root.u.def.section;
5220 }
5221 val += look->r_addend;
5222 if (code_off != NULL)
5223 *code_off = val;
5224 if (code_sec != NULL)
5225 *code_sec = sec;
5226 if (sec != NULL && sec->output_section != NULL)
5227 val += sec->output_section->vma + sec->output_offset;
5228 }
5229 break;
5230 }
5231 }
5232
5233 return val;
5234 }
5235
5236 /* Mark all our entry sym sections, both opd and code section. */
5237
5238 static void
5239 ppc64_elf_gc_keep (struct bfd_link_info *info)
5240 {
5241 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5242 struct bfd_sym_chain *sym;
5243
5244 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5245 {
5246 struct ppc_link_hash_entry *eh;
5247 asection *sec;
5248
5249 eh = (struct ppc_link_hash_entry *)
5250 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5251 if (eh == NULL)
5252 continue;
5253 if (eh->elf.root.type != bfd_link_hash_defined
5254 && eh->elf.root.type != bfd_link_hash_defweak)
5255 continue;
5256
5257 if (eh->is_func_descriptor
5258 && (eh->oh->elf.root.type == bfd_link_hash_defined
5259 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5260 {
5261 sec = eh->oh->elf.root.u.def.section;
5262 sec->flags |= SEC_KEEP;
5263 }
5264 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5265 && opd_entry_value (eh->elf.root.u.def.section,
5266 eh->elf.root.u.def.value,
5267 &sec, NULL) != (bfd_vma) -1)
5268 sec->flags |= SEC_KEEP;
5269
5270 sec = eh->elf.root.u.def.section;
5271 sec->flags |= SEC_KEEP;
5272 }
5273 }
5274
5275 /* Mark sections containing dynamically referenced symbols. When
5276 building shared libraries, we must assume that any visible symbol is
5277 referenced. */
5278
5279 static bfd_boolean
5280 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5281 {
5282 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5283 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5284
5285 if (eh->elf.root.type == bfd_link_hash_warning)
5286 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5287
5288 /* Dynamic linking info is on the func descriptor sym. */
5289 if (eh->oh != NULL
5290 && eh->oh->is_func_descriptor
5291 && (eh->oh->elf.root.type == bfd_link_hash_defined
5292 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5293 eh = eh->oh;
5294
5295 if ((eh->elf.root.type == bfd_link_hash_defined
5296 || eh->elf.root.type == bfd_link_hash_defweak)
5297 && (eh->elf.ref_dynamic
5298 || (!info->executable
5299 && eh->elf.def_regular
5300 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5301 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5302 {
5303 asection *code_sec;
5304
5305 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5306
5307 /* Function descriptor syms cause the associated
5308 function code sym section to be marked. */
5309 if (eh->is_func_descriptor
5310 && (eh->oh->elf.root.type == bfd_link_hash_defined
5311 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5312 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5313 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5314 && opd_entry_value (eh->elf.root.u.def.section,
5315 eh->elf.root.u.def.value,
5316 &code_sec, NULL) != (bfd_vma) -1)
5317 code_sec->flags |= SEC_KEEP;
5318 }
5319
5320 return TRUE;
5321 }
5322
5323 /* Return the section that should be marked against GC for a given
5324 relocation. */
5325
5326 static asection *
5327 ppc64_elf_gc_mark_hook (asection *sec,
5328 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5329 Elf_Internal_Rela *rel,
5330 struct elf_link_hash_entry *h,
5331 Elf_Internal_Sym *sym)
5332 {
5333 asection *rsec;
5334
5335 /* Syms return NULL if we're marking .opd, so we avoid marking all
5336 function sections, as all functions are referenced in .opd. */
5337 rsec = NULL;
5338 if (get_opd_info (sec) != NULL)
5339 return rsec;
5340
5341 if (h != NULL)
5342 {
5343 enum elf_ppc64_reloc_type r_type;
5344 struct ppc_link_hash_entry *eh;
5345
5346 r_type = ELF64_R_TYPE (rel->r_info);
5347 switch (r_type)
5348 {
5349 case R_PPC64_GNU_VTINHERIT:
5350 case R_PPC64_GNU_VTENTRY:
5351 break;
5352
5353 default:
5354 switch (h->root.type)
5355 {
5356 case bfd_link_hash_defined:
5357 case bfd_link_hash_defweak:
5358 eh = (struct ppc_link_hash_entry *) h;
5359 if (eh->oh != NULL
5360 && eh->oh->is_func_descriptor
5361 && (eh->oh->elf.root.type == bfd_link_hash_defined
5362 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5363 eh = eh->oh;
5364
5365 /* Function descriptor syms cause the associated
5366 function code sym section to be marked. */
5367 if (eh->is_func_descriptor
5368 && (eh->oh->elf.root.type == bfd_link_hash_defined
5369 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5370 {
5371 /* They also mark their opd section. */
5372 eh->elf.root.u.def.section->gc_mark = 1;
5373
5374 rsec = eh->oh->elf.root.u.def.section;
5375 }
5376 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5377 && opd_entry_value (eh->elf.root.u.def.section,
5378 eh->elf.root.u.def.value,
5379 &rsec, NULL) != (bfd_vma) -1)
5380 eh->elf.root.u.def.section->gc_mark = 1;
5381 else
5382 rsec = h->root.u.def.section;
5383 break;
5384
5385 case bfd_link_hash_common:
5386 rsec = h->root.u.c.p->section;
5387 break;
5388
5389 default:
5390 break;
5391 }
5392 }
5393 }
5394 else
5395 {
5396 struct _opd_sec_data *opd;
5397
5398 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5399 opd = get_opd_info (rsec);
5400 if (opd != NULL && opd->func_sec != NULL)
5401 {
5402 rsec->gc_mark = 1;
5403
5404 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5405 }
5406 }
5407
5408 return rsec;
5409 }
5410
5411 /* Update the .got, .plt. and dynamic reloc reference counts for the
5412 section being removed. */
5413
5414 static bfd_boolean
5415 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5416 asection *sec, const Elf_Internal_Rela *relocs)
5417 {
5418 struct ppc_link_hash_table *htab;
5419 Elf_Internal_Shdr *symtab_hdr;
5420 struct elf_link_hash_entry **sym_hashes;
5421 struct got_entry **local_got_ents;
5422 const Elf_Internal_Rela *rel, *relend;
5423
5424 if (info->relocatable)
5425 return TRUE;
5426
5427 if ((sec->flags & SEC_ALLOC) == 0)
5428 return TRUE;
5429
5430 elf_section_data (sec)->local_dynrel = NULL;
5431
5432 htab = ppc_hash_table (info);
5433 symtab_hdr = &elf_symtab_hdr (abfd);
5434 sym_hashes = elf_sym_hashes (abfd);
5435 local_got_ents = elf_local_got_ents (abfd);
5436
5437 relend = relocs + sec->reloc_count;
5438 for (rel = relocs; rel < relend; rel++)
5439 {
5440 unsigned long r_symndx;
5441 enum elf_ppc64_reloc_type r_type;
5442 struct elf_link_hash_entry *h = NULL;
5443 char tls_type = 0;
5444
5445 r_symndx = ELF64_R_SYM (rel->r_info);
5446 r_type = ELF64_R_TYPE (rel->r_info);
5447 if (r_symndx >= symtab_hdr->sh_info)
5448 {
5449 struct ppc_link_hash_entry *eh;
5450 struct ppc_dyn_relocs **pp;
5451 struct ppc_dyn_relocs *p;
5452
5453 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5454 while (h->root.type == bfd_link_hash_indirect
5455 || h->root.type == bfd_link_hash_warning)
5456 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5457 eh = (struct ppc_link_hash_entry *) h;
5458
5459 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5460 if (p->sec == sec)
5461 {
5462 /* Everything must go for SEC. */
5463 *pp = p->next;
5464 break;
5465 }
5466 }
5467
5468 switch (r_type)
5469 {
5470 case R_PPC64_GOT_TLSLD16:
5471 case R_PPC64_GOT_TLSLD16_LO:
5472 case R_PPC64_GOT_TLSLD16_HI:
5473 case R_PPC64_GOT_TLSLD16_HA:
5474 tls_type = TLS_TLS | TLS_LD;
5475 goto dogot;
5476
5477 case R_PPC64_GOT_TLSGD16:
5478 case R_PPC64_GOT_TLSGD16_LO:
5479 case R_PPC64_GOT_TLSGD16_HI:
5480 case R_PPC64_GOT_TLSGD16_HA:
5481 tls_type = TLS_TLS | TLS_GD;
5482 goto dogot;
5483
5484 case R_PPC64_GOT_TPREL16_DS:
5485 case R_PPC64_GOT_TPREL16_LO_DS:
5486 case R_PPC64_GOT_TPREL16_HI:
5487 case R_PPC64_GOT_TPREL16_HA:
5488 tls_type = TLS_TLS | TLS_TPREL;
5489 goto dogot;
5490
5491 case R_PPC64_GOT_DTPREL16_DS:
5492 case R_PPC64_GOT_DTPREL16_LO_DS:
5493 case R_PPC64_GOT_DTPREL16_HI:
5494 case R_PPC64_GOT_DTPREL16_HA:
5495 tls_type = TLS_TLS | TLS_DTPREL;
5496 goto dogot;
5497
5498 case R_PPC64_GOT16:
5499 case R_PPC64_GOT16_DS:
5500 case R_PPC64_GOT16_HA:
5501 case R_PPC64_GOT16_HI:
5502 case R_PPC64_GOT16_LO:
5503 case R_PPC64_GOT16_LO_DS:
5504 dogot:
5505 {
5506 struct got_entry *ent;
5507
5508 if (h != NULL)
5509 ent = h->got.glist;
5510 else
5511 ent = local_got_ents[r_symndx];
5512
5513 for (; ent != NULL; ent = ent->next)
5514 if (ent->addend == rel->r_addend
5515 && ent->owner == abfd
5516 && ent->tls_type == tls_type)
5517 break;
5518 if (ent == NULL)
5519 abort ();
5520 if (ent->got.refcount > 0)
5521 ent->got.refcount -= 1;
5522 }
5523 break;
5524
5525 case R_PPC64_PLT16_HA:
5526 case R_PPC64_PLT16_HI:
5527 case R_PPC64_PLT16_LO:
5528 case R_PPC64_PLT32:
5529 case R_PPC64_PLT64:
5530 case R_PPC64_REL14:
5531 case R_PPC64_REL14_BRNTAKEN:
5532 case R_PPC64_REL14_BRTAKEN:
5533 case R_PPC64_REL24:
5534 if (h != NULL)
5535 {
5536 struct plt_entry *ent;
5537
5538 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5539 if (ent->addend == rel->r_addend)
5540 break;
5541 if (ent == NULL)
5542 abort ();
5543 if (ent->plt.refcount > 0)
5544 ent->plt.refcount -= 1;
5545 }
5546 break;
5547
5548 default:
5549 break;
5550 }
5551 }
5552 return TRUE;
5553 }
5554
5555 /* The maximum size of .sfpr. */
5556 #define SFPR_MAX (218*4)
5557
5558 struct sfpr_def_parms
5559 {
5560 const char name[12];
5561 unsigned char lo, hi;
5562 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5563 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5564 };
5565
5566 /* Auto-generate _save*, _rest* functions in .sfpr. */
5567
5568 static unsigned int
5569 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5570 {
5571 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5572 unsigned int i;
5573 size_t len = strlen (parm->name);
5574 bfd_boolean writing = FALSE;
5575 char sym[16];
5576
5577 memcpy (sym, parm->name, len);
5578 sym[len + 2] = 0;
5579
5580 for (i = parm->lo; i <= parm->hi; i++)
5581 {
5582 struct elf_link_hash_entry *h;
5583
5584 sym[len + 0] = i / 10 + '0';
5585 sym[len + 1] = i % 10 + '0';
5586 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5587 if (h != NULL
5588 && !h->def_regular)
5589 {
5590 h->root.type = bfd_link_hash_defined;
5591 h->root.u.def.section = htab->sfpr;
5592 h->root.u.def.value = htab->sfpr->size;
5593 h->type = STT_FUNC;
5594 h->def_regular = 1;
5595 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5596 writing = TRUE;
5597 if (htab->sfpr->contents == NULL)
5598 {
5599 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5600 if (htab->sfpr->contents == NULL)
5601 return FALSE;
5602 }
5603 }
5604 if (writing)
5605 {
5606 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5607 if (i != parm->hi)
5608 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5609 else
5610 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5611 htab->sfpr->size = p - htab->sfpr->contents;
5612 }
5613 }
5614
5615 return TRUE;
5616 }
5617
5618 static bfd_byte *
5619 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5620 {
5621 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5622 return p + 4;
5623 }
5624
5625 static bfd_byte *
5626 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5627 {
5628 p = savegpr0 (abfd, p, r);
5629 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5630 p = p + 4;
5631 bfd_put_32 (abfd, BLR, p);
5632 return p + 4;
5633 }
5634
5635 static bfd_byte *
5636 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5637 {
5638 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5639 return p + 4;
5640 }
5641
5642 static bfd_byte *
5643 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5644 {
5645 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5646 p = p + 4;
5647 p = restgpr0 (abfd, p, r);
5648 bfd_put_32 (abfd, MTLR_R0, p);
5649 p = p + 4;
5650 if (r == 29)
5651 {
5652 p = restgpr0 (abfd, p, 30);
5653 p = restgpr0 (abfd, p, 31);
5654 }
5655 bfd_put_32 (abfd, BLR, p);
5656 return p + 4;
5657 }
5658
5659 static bfd_byte *
5660 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5661 {
5662 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5663 return p + 4;
5664 }
5665
5666 static bfd_byte *
5667 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5668 {
5669 p = savegpr1 (abfd, p, r);
5670 bfd_put_32 (abfd, BLR, p);
5671 return p + 4;
5672 }
5673
5674 static bfd_byte *
5675 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5676 {
5677 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5678 return p + 4;
5679 }
5680
5681 static bfd_byte *
5682 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5683 {
5684 p = restgpr1 (abfd, p, r);
5685 bfd_put_32 (abfd, BLR, p);
5686 return p + 4;
5687 }
5688
5689 static bfd_byte *
5690 savefpr (bfd *abfd, bfd_byte *p, int r)
5691 {
5692 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5693 return p + 4;
5694 }
5695
5696 static bfd_byte *
5697 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5698 {
5699 p = savefpr (abfd, p, r);
5700 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5701 p = p + 4;
5702 bfd_put_32 (abfd, BLR, p);
5703 return p + 4;
5704 }
5705
5706 static bfd_byte *
5707 restfpr (bfd *abfd, bfd_byte *p, int r)
5708 {
5709 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5710 return p + 4;
5711 }
5712
5713 static bfd_byte *
5714 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5715 {
5716 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5717 p = p + 4;
5718 p = restfpr (abfd, p, r);
5719 bfd_put_32 (abfd, MTLR_R0, p);
5720 p = p + 4;
5721 if (r == 29)
5722 {
5723 p = restfpr (abfd, p, 30);
5724 p = restfpr (abfd, p, 31);
5725 }
5726 bfd_put_32 (abfd, BLR, p);
5727 return p + 4;
5728 }
5729
5730 static bfd_byte *
5731 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5732 {
5733 p = savefpr (abfd, p, r);
5734 bfd_put_32 (abfd, BLR, p);
5735 return p + 4;
5736 }
5737
5738 static bfd_byte *
5739 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5740 {
5741 p = restfpr (abfd, p, r);
5742 bfd_put_32 (abfd, BLR, p);
5743 return p + 4;
5744 }
5745
5746 static bfd_byte *
5747 savevr (bfd *abfd, bfd_byte *p, int r)
5748 {
5749 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5750 p = p + 4;
5751 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5752 return p + 4;
5753 }
5754
5755 static bfd_byte *
5756 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5757 {
5758 p = savevr (abfd, p, r);
5759 bfd_put_32 (abfd, BLR, p);
5760 return p + 4;
5761 }
5762
5763 static bfd_byte *
5764 restvr (bfd *abfd, bfd_byte *p, int r)
5765 {
5766 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5767 p = p + 4;
5768 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5769 return p + 4;
5770 }
5771
5772 static bfd_byte *
5773 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5774 {
5775 p = restvr (abfd, p, r);
5776 bfd_put_32 (abfd, BLR, p);
5777 return p + 4;
5778 }
5779
5780 /* Called via elf_link_hash_traverse to transfer dynamic linking
5781 information on function code symbol entries to their corresponding
5782 function descriptor symbol entries. */
5783
5784 static bfd_boolean
5785 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5786 {
5787 struct bfd_link_info *info;
5788 struct ppc_link_hash_table *htab;
5789 struct plt_entry *ent;
5790 struct ppc_link_hash_entry *fh;
5791 struct ppc_link_hash_entry *fdh;
5792 bfd_boolean force_local;
5793
5794 fh = (struct ppc_link_hash_entry *) h;
5795 if (fh->elf.root.type == bfd_link_hash_indirect)
5796 return TRUE;
5797
5798 if (fh->elf.root.type == bfd_link_hash_warning)
5799 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5800
5801 info = inf;
5802 htab = ppc_hash_table (info);
5803
5804 /* Resolve undefined references to dot-symbols as the value
5805 in the function descriptor, if we have one in a regular object.
5806 This is to satisfy cases like ".quad .foo". Calls to functions
5807 in dynamic objects are handled elsewhere. */
5808 if (fh->elf.root.type == bfd_link_hash_undefweak
5809 && fh->was_undefined
5810 && (fh->oh->elf.root.type == bfd_link_hash_defined
5811 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5812 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5813 && opd_entry_value (fh->oh->elf.root.u.def.section,
5814 fh->oh->elf.root.u.def.value,
5815 &fh->elf.root.u.def.section,
5816 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5817 {
5818 fh->elf.root.type = fh->oh->elf.root.type;
5819 fh->elf.forced_local = 1;
5820 fh->elf.def_regular = fh->oh->elf.def_regular;
5821 fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
5822 }
5823
5824 /* If this is a function code symbol, transfer dynamic linking
5825 information to the function descriptor symbol. */
5826 if (!fh->is_func)
5827 return TRUE;
5828
5829 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5830 if (ent->plt.refcount > 0)
5831 break;
5832 if (ent == NULL
5833 || fh->elf.root.root.string[0] != '.'
5834 || fh->elf.root.root.string[1] == '\0')
5835 return TRUE;
5836
5837 /* Find the corresponding function descriptor symbol. Create it
5838 as undefined if necessary. */
5839
5840 fdh = get_fdh (fh, htab);
5841 if (fdh != NULL)
5842 while (fdh->elf.root.type == bfd_link_hash_indirect
5843 || fdh->elf.root.type == bfd_link_hash_warning)
5844 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5845
5846 if (fdh == NULL
5847 && info->shared
5848 && (fh->elf.root.type == bfd_link_hash_undefined
5849 || fh->elf.root.type == bfd_link_hash_undefweak))
5850 {
5851 fdh = make_fdh (info, fh);
5852 if (fdh == NULL)
5853 return FALSE;
5854 }
5855
5856 /* Fake function descriptors are made undefweak. If the function
5857 code symbol is strong undefined, make the fake sym the same.
5858 If the function code symbol is defined, then force the fake
5859 descriptor local; We can't support overriding of symbols in a
5860 shared library on a fake descriptor. */
5861
5862 if (fdh != NULL
5863 && fdh->fake
5864 && fdh->elf.root.type == bfd_link_hash_undefweak)
5865 {
5866 if (fh->elf.root.type == bfd_link_hash_undefined)
5867 {
5868 fdh->elf.root.type = bfd_link_hash_undefined;
5869 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5870 }
5871 else if (fh->elf.root.type == bfd_link_hash_defined
5872 || fh->elf.root.type == bfd_link_hash_defweak)
5873 {
5874 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5875 }
5876 }
5877
5878 if (fdh != NULL
5879 && !fdh->elf.forced_local
5880 && (info->shared
5881 || fdh->elf.def_dynamic
5882 || fdh->elf.ref_dynamic
5883 || (fdh->elf.root.type == bfd_link_hash_undefweak
5884 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5885 {
5886 if (fdh->elf.dynindx == -1)
5887 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5888 return FALSE;
5889 fdh->elf.ref_regular |= fh->elf.ref_regular;
5890 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5891 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5892 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5893 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5894 {
5895 move_plt_plist (fh, fdh);
5896 fdh->elf.needs_plt = 1;
5897 }
5898 fdh->is_func_descriptor = 1;
5899 fdh->oh = fh;
5900 fh->oh = fdh;
5901 }
5902
5903 /* Now that the info is on the function descriptor, clear the
5904 function code sym info. Any function code syms for which we
5905 don't have a definition in a regular file, we force local.
5906 This prevents a shared library from exporting syms that have
5907 been imported from another library. Function code syms that
5908 are really in the library we must leave global to prevent the
5909 linker dragging in a definition from a static library. */
5910 force_local = (!fh->elf.def_regular
5911 || fdh == NULL
5912 || !fdh->elf.def_regular
5913 || fdh->elf.forced_local);
5914 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5915
5916 return TRUE;
5917 }
5918
5919 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5920 this hook to a) provide some gcc support functions, and b) transfer
5921 dynamic linking information gathered so far on function code symbol
5922 entries, to their corresponding function descriptor symbol entries. */
5923
5924 static bfd_boolean
5925 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5926 struct bfd_link_info *info)
5927 {
5928 struct ppc_link_hash_table *htab;
5929 unsigned int i;
5930 const struct sfpr_def_parms funcs[] =
5931 {
5932 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5933 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5934 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5935 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5936 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5937 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5938 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5939 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5940 { "._savef", 14, 31, savefpr, savefpr1_tail },
5941 { "._restf", 14, 31, restfpr, restfpr1_tail },
5942 { "_savevr_", 20, 31, savevr, savevr_tail },
5943 { "_restvr_", 20, 31, restvr, restvr_tail }
5944 };
5945
5946 htab = ppc_hash_table (info);
5947 if (htab->sfpr == NULL)
5948 /* We don't have any relocs. */
5949 return TRUE;
5950
5951 /* Provide any missing _save* and _rest* functions. */
5952 htab->sfpr->size = 0;
5953 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5954 if (!sfpr_define (info, &funcs[i]))
5955 return FALSE;
5956
5957 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5958
5959 if (htab->sfpr->size == 0)
5960 htab->sfpr->flags |= SEC_EXCLUDE;
5961
5962 return TRUE;
5963 }
5964
5965 /* Adjust a symbol defined by a dynamic object and referenced by a
5966 regular object. The current definition is in some section of the
5967 dynamic object, but we're not including those sections. We have to
5968 change the definition to something the rest of the link can
5969 understand. */
5970
5971 static bfd_boolean
5972 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5973 struct elf_link_hash_entry *h)
5974 {
5975 struct ppc_link_hash_table *htab;
5976 asection *s;
5977
5978 htab = ppc_hash_table (info);
5979
5980 /* Deal with function syms. */
5981 if (h->type == STT_FUNC
5982 || h->needs_plt)
5983 {
5984 /* Clear procedure linkage table information for any symbol that
5985 won't need a .plt entry. */
5986 struct plt_entry *ent;
5987 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5988 if (ent->plt.refcount > 0)
5989 break;
5990 if (ent == NULL
5991 || SYMBOL_CALLS_LOCAL (info, h)
5992 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5993 && h->root.type == bfd_link_hash_undefweak))
5994 {
5995 h->plt.plist = NULL;
5996 h->needs_plt = 0;
5997 }
5998 }
5999 else
6000 h->plt.plist = NULL;
6001
6002 /* If this is a weak symbol, and there is a real definition, the
6003 processor independent code will have arranged for us to see the
6004 real definition first, and we can just use the same value. */
6005 if (h->u.weakdef != NULL)
6006 {
6007 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6008 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6009 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6010 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6011 if (ELIMINATE_COPY_RELOCS)
6012 h->non_got_ref = h->u.weakdef->non_got_ref;
6013 return TRUE;
6014 }
6015
6016 /* If we are creating a shared library, we must presume that the
6017 only references to the symbol are via the global offset table.
6018 For such cases we need not do anything here; the relocations will
6019 be handled correctly by relocate_section. */
6020 if (info->shared)
6021 return TRUE;
6022
6023 /* If there are no references to this symbol that do not use the
6024 GOT, we don't need to generate a copy reloc. */
6025 if (!h->non_got_ref)
6026 return TRUE;
6027
6028 /* Don't generate a copy reloc for symbols defined in the executable. */
6029 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6030 return TRUE;
6031
6032 if (ELIMINATE_COPY_RELOCS)
6033 {
6034 struct ppc_link_hash_entry * eh;
6035 struct ppc_dyn_relocs *p;
6036
6037 eh = (struct ppc_link_hash_entry *) h;
6038 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6039 {
6040 s = p->sec->output_section;
6041 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6042 break;
6043 }
6044
6045 /* If we didn't find any dynamic relocs in read-only sections, then
6046 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6047 if (p == NULL)
6048 {
6049 h->non_got_ref = 0;
6050 return TRUE;
6051 }
6052 }
6053
6054 if (h->plt.plist != NULL)
6055 {
6056 /* We should never get here, but unfortunately there are versions
6057 of gcc out there that improperly (for this ABI) put initialized
6058 function pointers, vtable refs and suchlike in read-only
6059 sections. Allow them to proceed, but warn that this might
6060 break at runtime. */
6061 (*_bfd_error_handler)
6062 (_("copy reloc against `%s' requires lazy plt linking; "
6063 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6064 h->root.root.string);
6065 }
6066
6067 /* This is a reference to a symbol defined by a dynamic object which
6068 is not a function. */
6069
6070 if (h->size == 0)
6071 {
6072 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6073 h->root.root.string);
6074 return TRUE;
6075 }
6076
6077 /* We must allocate the symbol in our .dynbss section, which will
6078 become part of the .bss section of the executable. There will be
6079 an entry for this symbol in the .dynsym section. The dynamic
6080 object will contain position independent code, so all references
6081 from the dynamic object to this symbol will go through the global
6082 offset table. The dynamic linker will use the .dynsym entry to
6083 determine the address it must put in the global offset table, so
6084 both the dynamic object and the regular object will refer to the
6085 same memory location for the variable. */
6086
6087 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6088 to copy the initial value out of the dynamic object and into the
6089 runtime process image. We need to remember the offset into the
6090 .rela.bss section we are going to use. */
6091 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6092 {
6093 htab->relbss->size += sizeof (Elf64_External_Rela);
6094 h->needs_copy = 1;
6095 }
6096
6097 s = htab->dynbss;
6098
6099 return _bfd_elf_adjust_dynamic_copy (h, s);
6100 }
6101
6102 /* If given a function descriptor symbol, hide both the function code
6103 sym and the descriptor. */
6104 static void
6105 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6106 struct elf_link_hash_entry *h,
6107 bfd_boolean force_local)
6108 {
6109 struct ppc_link_hash_entry *eh;
6110 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6111
6112 eh = (struct ppc_link_hash_entry *) h;
6113 if (eh->is_func_descriptor)
6114 {
6115 struct ppc_link_hash_entry *fh = eh->oh;
6116
6117 if (fh == NULL)
6118 {
6119 const char *p, *q;
6120 struct ppc_link_hash_table *htab;
6121 char save;
6122
6123 /* We aren't supposed to use alloca in BFD because on
6124 systems which do not have alloca the version in libiberty
6125 calls xmalloc, which might cause the program to crash
6126 when it runs out of memory. This function doesn't have a
6127 return status, so there's no way to gracefully return an
6128 error. So cheat. We know that string[-1] can be safely
6129 accessed; It's either a string in an ELF string table,
6130 or allocated in an objalloc structure. */
6131
6132 p = eh->elf.root.root.string - 1;
6133 save = *p;
6134 *(char *) p = '.';
6135 htab = ppc_hash_table (info);
6136 fh = (struct ppc_link_hash_entry *)
6137 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6138 *(char *) p = save;
6139
6140 /* Unfortunately, if it so happens that the string we were
6141 looking for was allocated immediately before this string,
6142 then we overwrote the string terminator. That's the only
6143 reason the lookup should fail. */
6144 if (fh == NULL)
6145 {
6146 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6147 while (q >= eh->elf.root.root.string && *q == *p)
6148 --q, --p;
6149 if (q < eh->elf.root.root.string && *p == '.')
6150 fh = (struct ppc_link_hash_entry *)
6151 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6152 }
6153 if (fh != NULL)
6154 {
6155 eh->oh = fh;
6156 fh->oh = eh;
6157 }
6158 }
6159 if (fh != NULL)
6160 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6161 }
6162 }
6163
6164 static bfd_boolean
6165 get_sym_h (struct elf_link_hash_entry **hp,
6166 Elf_Internal_Sym **symp,
6167 asection **symsecp,
6168 char **tls_maskp,
6169 Elf_Internal_Sym **locsymsp,
6170 unsigned long r_symndx,
6171 bfd *ibfd)
6172 {
6173 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6174
6175 if (r_symndx >= symtab_hdr->sh_info)
6176 {
6177 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6178 struct elf_link_hash_entry *h;
6179
6180 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6181 while (h->root.type == bfd_link_hash_indirect
6182 || h->root.type == bfd_link_hash_warning)
6183 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6184
6185 if (hp != NULL)
6186 *hp = h;
6187
6188 if (symp != NULL)
6189 *symp = NULL;
6190
6191 if (symsecp != NULL)
6192 {
6193 asection *symsec = NULL;
6194 if (h->root.type == bfd_link_hash_defined
6195 || h->root.type == bfd_link_hash_defweak)
6196 symsec = h->root.u.def.section;
6197 *symsecp = symsec;
6198 }
6199
6200 if (tls_maskp != NULL)
6201 {
6202 struct ppc_link_hash_entry *eh;
6203
6204 eh = (struct ppc_link_hash_entry *) h;
6205 *tls_maskp = &eh->tls_mask;
6206 }
6207 }
6208 else
6209 {
6210 Elf_Internal_Sym *sym;
6211 Elf_Internal_Sym *locsyms = *locsymsp;
6212
6213 if (locsyms == NULL)
6214 {
6215 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6216 if (locsyms == NULL)
6217 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6218 symtab_hdr->sh_info,
6219 0, NULL, NULL, NULL);
6220 if (locsyms == NULL)
6221 return FALSE;
6222 *locsymsp = locsyms;
6223 }
6224 sym = locsyms + r_symndx;
6225
6226 if (hp != NULL)
6227 *hp = NULL;
6228
6229 if (symp != NULL)
6230 *symp = sym;
6231
6232 if (symsecp != NULL)
6233 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6234
6235 if (tls_maskp != NULL)
6236 {
6237 struct got_entry **lgot_ents;
6238 char *tls_mask;
6239
6240 tls_mask = NULL;
6241 lgot_ents = elf_local_got_ents (ibfd);
6242 if (lgot_ents != NULL)
6243 {
6244 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6245 tls_mask = &lgot_masks[r_symndx];
6246 }
6247 *tls_maskp = tls_mask;
6248 }
6249 }
6250 return TRUE;
6251 }
6252
6253 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6254 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6255 type suitable for optimization, and 1 otherwise. */
6256
6257 static int
6258 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6259 Elf_Internal_Sym **locsymsp,
6260 const Elf_Internal_Rela *rel, bfd *ibfd)
6261 {
6262 unsigned long r_symndx;
6263 int next_r;
6264 struct elf_link_hash_entry *h;
6265 Elf_Internal_Sym *sym;
6266 asection *sec;
6267 bfd_vma off;
6268
6269 r_symndx = ELF64_R_SYM (rel->r_info);
6270 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6271 return 0;
6272
6273 if ((*tls_maskp != NULL && **tls_maskp != 0)
6274 || sec == NULL
6275 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6276 return 1;
6277
6278 /* Look inside a TOC section too. */
6279 if (h != NULL)
6280 {
6281 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6282 off = h->root.u.def.value;
6283 }
6284 else
6285 off = sym->st_value;
6286 off += rel->r_addend;
6287 BFD_ASSERT (off % 8 == 0);
6288 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6289 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6290 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6291 return 0;
6292 if (toc_symndx != NULL)
6293 *toc_symndx = r_symndx;
6294 if ((h == NULL
6295 || ((h->root.type == bfd_link_hash_defined
6296 || h->root.type == bfd_link_hash_defweak)
6297 && !h->def_dynamic))
6298 && (next_r == -1 || next_r == -2))
6299 return 1 - next_r;
6300 return 1;
6301 }
6302
6303 /* Adjust all global syms defined in opd sections. In gcc generated
6304 code for the old ABI, these will already have been done. */
6305
6306 static bfd_boolean
6307 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6308 {
6309 struct ppc_link_hash_entry *eh;
6310 asection *sym_sec;
6311 struct _opd_sec_data *opd;
6312
6313 if (h->root.type == bfd_link_hash_indirect)
6314 return TRUE;
6315
6316 if (h->root.type == bfd_link_hash_warning)
6317 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6318
6319 if (h->root.type != bfd_link_hash_defined
6320 && h->root.type != bfd_link_hash_defweak)
6321 return TRUE;
6322
6323 eh = (struct ppc_link_hash_entry *) h;
6324 if (eh->adjust_done)
6325 return TRUE;
6326
6327 sym_sec = eh->elf.root.u.def.section;
6328 opd = get_opd_info (sym_sec);
6329 if (opd != NULL && opd->adjust != NULL)
6330 {
6331 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6332 if (adjust == -1)
6333 {
6334 /* This entry has been deleted. */
6335 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6336 if (dsec == NULL)
6337 {
6338 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6339 if (elf_discarded_section (dsec))
6340 {
6341 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6342 break;
6343 }
6344 }
6345 eh->elf.root.u.def.value = 0;
6346 eh->elf.root.u.def.section = dsec;
6347 }
6348 else
6349 eh->elf.root.u.def.value += adjust;
6350 eh->adjust_done = 1;
6351 }
6352 return TRUE;
6353 }
6354
6355 /* Handles decrementing dynamic reloc counts for the reloc specified by
6356 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6357 have already been determined. */
6358
6359 static bfd_boolean
6360 dec_dynrel_count (bfd_vma r_info,
6361 asection *sec,
6362 struct bfd_link_info *info,
6363 Elf_Internal_Sym **local_syms,
6364 struct elf_link_hash_entry *h,
6365 asection *sym_sec)
6366 {
6367 enum elf_ppc64_reloc_type r_type;
6368 struct ppc_dyn_relocs *p;
6369 struct ppc_dyn_relocs **pp;
6370
6371 /* Can this reloc be dynamic? This switch, and later tests here
6372 should be kept in sync with the code in check_relocs. */
6373 r_type = ELF64_R_TYPE (r_info);
6374 switch (r_type)
6375 {
6376 default:
6377 return TRUE;
6378
6379 case R_PPC64_TPREL16:
6380 case R_PPC64_TPREL16_LO:
6381 case R_PPC64_TPREL16_HI:
6382 case R_PPC64_TPREL16_HA:
6383 case R_PPC64_TPREL16_DS:
6384 case R_PPC64_TPREL16_LO_DS:
6385 case R_PPC64_TPREL16_HIGHER:
6386 case R_PPC64_TPREL16_HIGHERA:
6387 case R_PPC64_TPREL16_HIGHEST:
6388 case R_PPC64_TPREL16_HIGHESTA:
6389 if (!info->shared)
6390 return TRUE;
6391
6392 case R_PPC64_TPREL64:
6393 case R_PPC64_DTPMOD64:
6394 case R_PPC64_DTPREL64:
6395 case R_PPC64_ADDR64:
6396 case R_PPC64_REL30:
6397 case R_PPC64_REL32:
6398 case R_PPC64_REL64:
6399 case R_PPC64_ADDR14:
6400 case R_PPC64_ADDR14_BRNTAKEN:
6401 case R_PPC64_ADDR14_BRTAKEN:
6402 case R_PPC64_ADDR16:
6403 case R_PPC64_ADDR16_DS:
6404 case R_PPC64_ADDR16_HA:
6405 case R_PPC64_ADDR16_HI:
6406 case R_PPC64_ADDR16_HIGHER:
6407 case R_PPC64_ADDR16_HIGHERA:
6408 case R_PPC64_ADDR16_HIGHEST:
6409 case R_PPC64_ADDR16_HIGHESTA:
6410 case R_PPC64_ADDR16_LO:
6411 case R_PPC64_ADDR16_LO_DS:
6412 case R_PPC64_ADDR24:
6413 case R_PPC64_ADDR32:
6414 case R_PPC64_UADDR16:
6415 case R_PPC64_UADDR32:
6416 case R_PPC64_UADDR64:
6417 case R_PPC64_TOC:
6418 break;
6419 }
6420
6421 if (local_syms != NULL)
6422 {
6423 unsigned long r_symndx;
6424 Elf_Internal_Sym *sym;
6425 bfd *ibfd = sec->owner;
6426
6427 r_symndx = ELF64_R_SYM (r_info);
6428 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6429 return FALSE;
6430 }
6431
6432 if ((info->shared
6433 && (must_be_dyn_reloc (info, r_type)
6434 || (h != NULL
6435 && (!info->symbolic
6436 || h->root.type == bfd_link_hash_defweak
6437 || !h->def_regular))))
6438 || (ELIMINATE_COPY_RELOCS
6439 && !info->shared
6440 && h != NULL
6441 && (h->root.type == bfd_link_hash_defweak
6442 || !h->def_regular)))
6443 ;
6444 else
6445 return TRUE;
6446
6447 if (h != NULL)
6448 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6449 else
6450 {
6451 if (sym_sec != NULL)
6452 {
6453 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6454 pp = (struct ppc_dyn_relocs **) vpp;
6455 }
6456 else
6457 {
6458 void *vpp = &elf_section_data (sec)->local_dynrel;
6459 pp = (struct ppc_dyn_relocs **) vpp;
6460 }
6461
6462 /* elf_gc_sweep may have already removed all dyn relocs associated
6463 with local syms for a given section. Don't report a dynreloc
6464 miscount. */
6465 if (*pp == NULL)
6466 return TRUE;
6467 }
6468
6469 while ((p = *pp) != NULL)
6470 {
6471 if (p->sec == sec)
6472 {
6473 if (!must_be_dyn_reloc (info, r_type))
6474 p->pc_count -= 1;
6475 p->count -= 1;
6476 if (p->count == 0)
6477 *pp = p->next;
6478 return TRUE;
6479 }
6480 pp = &p->next;
6481 }
6482
6483 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6484 sec->owner, sec);
6485 bfd_set_error (bfd_error_bad_value);
6486 return FALSE;
6487 }
6488
6489 /* Remove unused Official Procedure Descriptor entries. Currently we
6490 only remove those associated with functions in discarded link-once
6491 sections, or weakly defined functions that have been overridden. It
6492 would be possible to remove many more entries for statically linked
6493 applications. */
6494
6495 bfd_boolean
6496 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6497 bfd_boolean non_overlapping)
6498 {
6499 bfd *ibfd;
6500 bfd_boolean some_edited = FALSE;
6501 asection *need_pad = NULL;
6502
6503 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6504 {
6505 asection *sec;
6506 Elf_Internal_Rela *relstart, *rel, *relend;
6507 Elf_Internal_Shdr *symtab_hdr;
6508 Elf_Internal_Sym *local_syms;
6509 struct elf_link_hash_entry **sym_hashes;
6510 bfd_vma offset;
6511 struct _opd_sec_data *opd;
6512 bfd_boolean need_edit, add_aux_fields;
6513 bfd_size_type cnt_16b = 0;
6514
6515 sec = bfd_get_section_by_name (ibfd, ".opd");
6516 if (sec == NULL || sec->size == 0)
6517 continue;
6518
6519 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6520 continue;
6521
6522 if (sec->output_section == bfd_abs_section_ptr)
6523 continue;
6524
6525 /* Look through the section relocs. */
6526 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6527 continue;
6528
6529 local_syms = NULL;
6530 symtab_hdr = &elf_symtab_hdr (ibfd);
6531 sym_hashes = elf_sym_hashes (ibfd);
6532
6533 /* Read the relocations. */
6534 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6535 info->keep_memory);
6536 if (relstart == NULL)
6537 return FALSE;
6538
6539 /* First run through the relocs to check they are sane, and to
6540 determine whether we need to edit this opd section. */
6541 need_edit = FALSE;
6542 need_pad = sec;
6543 offset = 0;
6544 relend = relstart + sec->reloc_count;
6545 for (rel = relstart; rel < relend; )
6546 {
6547 enum elf_ppc64_reloc_type r_type;
6548 unsigned long r_symndx;
6549 asection *sym_sec;
6550 struct elf_link_hash_entry *h;
6551 Elf_Internal_Sym *sym;
6552
6553 /* .opd contains a regular array of 16 or 24 byte entries. We're
6554 only interested in the reloc pointing to a function entry
6555 point. */
6556 if (rel->r_offset != offset
6557 || rel + 1 >= relend
6558 || (rel + 1)->r_offset != offset + 8)
6559 {
6560 /* If someone messes with .opd alignment then after a
6561 "ld -r" we might have padding in the middle of .opd.
6562 Also, there's nothing to prevent someone putting
6563 something silly in .opd with the assembler. No .opd
6564 optimization for them! */
6565 broken_opd:
6566 (*_bfd_error_handler)
6567 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6568 need_edit = FALSE;
6569 break;
6570 }
6571
6572 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6573 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6574 {
6575 (*_bfd_error_handler)
6576 (_("%B: unexpected reloc type %u in .opd section"),
6577 ibfd, r_type);
6578 need_edit = FALSE;
6579 break;
6580 }
6581
6582 r_symndx = ELF64_R_SYM (rel->r_info);
6583 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6584 r_symndx, ibfd))
6585 goto error_ret;
6586
6587 if (sym_sec == NULL || sym_sec->owner == NULL)
6588 {
6589 const char *sym_name;
6590 if (h != NULL)
6591 sym_name = h->root.root.string;
6592 else
6593 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6594 sym_sec);
6595
6596 (*_bfd_error_handler)
6597 (_("%B: undefined sym `%s' in .opd section"),
6598 ibfd, sym_name);
6599 need_edit = FALSE;
6600 break;
6601 }
6602
6603 /* opd entries are always for functions defined in the
6604 current input bfd. If the symbol isn't defined in the
6605 input bfd, then we won't be using the function in this
6606 bfd; It must be defined in a linkonce section in another
6607 bfd, or is weak. It's also possible that we are
6608 discarding the function due to a linker script /DISCARD/,
6609 which we test for via the output_section. */
6610 if (sym_sec->owner != ibfd
6611 || sym_sec->output_section == bfd_abs_section_ptr)
6612 need_edit = TRUE;
6613
6614 rel += 2;
6615 if (rel == relend
6616 || (rel + 1 == relend && rel->r_offset == offset + 16))
6617 {
6618 if (sec->size == offset + 24)
6619 {
6620 need_pad = NULL;
6621 break;
6622 }
6623 if (rel == relend && sec->size == offset + 16)
6624 {
6625 cnt_16b++;
6626 break;
6627 }
6628 goto broken_opd;
6629 }
6630
6631 if (rel->r_offset == offset + 24)
6632 offset += 24;
6633 else if (rel->r_offset != offset + 16)
6634 goto broken_opd;
6635 else if (rel + 1 < relend
6636 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6637 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6638 {
6639 offset += 16;
6640 cnt_16b++;
6641 }
6642 else if (rel + 2 < relend
6643 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6644 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6645 {
6646 offset += 24;
6647 rel += 1;
6648 }
6649 else
6650 goto broken_opd;
6651 }
6652
6653 add_aux_fields = non_overlapping && cnt_16b > 0;
6654
6655 if (need_edit || add_aux_fields)
6656 {
6657 Elf_Internal_Rela *write_rel;
6658 bfd_byte *rptr, *wptr;
6659 bfd_byte *new_contents = NULL;
6660 bfd_boolean skip;
6661 long opd_ent_size;
6662 bfd_size_type amt;
6663
6664 amt = sec->size * sizeof (long) / 8;
6665 opd = &ppc64_elf_section_data (sec)->u.opd;
6666 opd->adjust = bfd_zalloc (obfd, amt);
6667 if (opd->adjust == NULL)
6668 return FALSE;
6669 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6670
6671 /* This seems a waste of time as input .opd sections are all
6672 zeros as generated by gcc, but I suppose there's no reason
6673 this will always be so. We might start putting something in
6674 the third word of .opd entries. */
6675 if ((sec->flags & SEC_IN_MEMORY) == 0)
6676 {
6677 bfd_byte *loc;
6678 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6679 {
6680 if (loc != NULL)
6681 free (loc);
6682 error_ret:
6683 if (local_syms != NULL
6684 && symtab_hdr->contents != (unsigned char *) local_syms)
6685 free (local_syms);
6686 if (elf_section_data (sec)->relocs != relstart)
6687 free (relstart);
6688 return FALSE;
6689 }
6690 sec->contents = loc;
6691 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6692 }
6693
6694 elf_section_data (sec)->relocs = relstart;
6695
6696 new_contents = sec->contents;
6697 if (add_aux_fields)
6698 {
6699 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6700 if (new_contents == NULL)
6701 return FALSE;
6702 need_pad = FALSE;
6703 }
6704 wptr = new_contents;
6705 rptr = sec->contents;
6706
6707 write_rel = relstart;
6708 skip = FALSE;
6709 offset = 0;
6710 opd_ent_size = 0;
6711 for (rel = relstart; rel < relend; rel++)
6712 {
6713 unsigned long r_symndx;
6714 asection *sym_sec;
6715 struct elf_link_hash_entry *h;
6716 Elf_Internal_Sym *sym;
6717
6718 r_symndx = ELF64_R_SYM (rel->r_info);
6719 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6720 r_symndx, ibfd))
6721 goto error_ret;
6722
6723 if (rel->r_offset == offset)
6724 {
6725 struct ppc_link_hash_entry *fdh = NULL;
6726
6727 /* See if the .opd entry is full 24 byte or
6728 16 byte (with fd_aux entry overlapped with next
6729 fd_func). */
6730 opd_ent_size = 24;
6731 if ((rel + 2 == relend && sec->size == offset + 16)
6732 || (rel + 3 < relend
6733 && rel[2].r_offset == offset + 16
6734 && rel[3].r_offset == offset + 24
6735 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6736 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6737 opd_ent_size = 16;
6738
6739 if (h != NULL
6740 && h->root.root.string[0] == '.')
6741 {
6742 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6743 ppc_hash_table (info));
6744 if (fdh != NULL
6745 && fdh->elf.root.type != bfd_link_hash_defined
6746 && fdh->elf.root.type != bfd_link_hash_defweak)
6747 fdh = NULL;
6748 }
6749
6750 skip = (sym_sec->owner != ibfd
6751 || sym_sec->output_section == bfd_abs_section_ptr);
6752 if (skip)
6753 {
6754 if (fdh != NULL && sym_sec->owner == ibfd)
6755 {
6756 /* Arrange for the function descriptor sym
6757 to be dropped. */
6758 fdh->elf.root.u.def.value = 0;
6759 fdh->elf.root.u.def.section = sym_sec;
6760 }
6761 opd->adjust[rel->r_offset / 8] = -1;
6762 }
6763 else
6764 {
6765 /* We'll be keeping this opd entry. */
6766
6767 if (fdh != NULL)
6768 {
6769 /* Redefine the function descriptor symbol to
6770 this location in the opd section. It is
6771 necessary to update the value here rather
6772 than using an array of adjustments as we do
6773 for local symbols, because various places
6774 in the generic ELF code use the value
6775 stored in u.def.value. */
6776 fdh->elf.root.u.def.value = wptr - new_contents;
6777 fdh->adjust_done = 1;
6778 }
6779
6780 /* Local syms are a bit tricky. We could
6781 tweak them as they can be cached, but
6782 we'd need to look through the local syms
6783 for the function descriptor sym which we
6784 don't have at the moment. So keep an
6785 array of adjustments. */
6786 opd->adjust[rel->r_offset / 8]
6787 = (wptr - new_contents) - (rptr - sec->contents);
6788
6789 if (wptr != rptr)
6790 memcpy (wptr, rptr, opd_ent_size);
6791 wptr += opd_ent_size;
6792 if (add_aux_fields && opd_ent_size == 16)
6793 {
6794 memset (wptr, '\0', 8);
6795 wptr += 8;
6796 }
6797 }
6798 rptr += opd_ent_size;
6799 offset += opd_ent_size;
6800 }
6801
6802 if (skip)
6803 {
6804 if (!NO_OPD_RELOCS
6805 && !info->relocatable
6806 && !dec_dynrel_count (rel->r_info, sec, info,
6807 NULL, h, sym_sec))
6808 goto error_ret;
6809 }
6810 else
6811 {
6812 /* We need to adjust any reloc offsets to point to the
6813 new opd entries. While we're at it, we may as well
6814 remove redundant relocs. */
6815 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
6816 if (write_rel != rel)
6817 memcpy (write_rel, rel, sizeof (*rel));
6818 ++write_rel;
6819 }
6820 }
6821
6822 sec->size = wptr - new_contents;
6823 sec->reloc_count = write_rel - relstart;
6824 if (add_aux_fields)
6825 {
6826 free (sec->contents);
6827 sec->contents = new_contents;
6828 }
6829
6830 /* Fudge the header size too, as this is used later in
6831 elf_bfd_final_link if we are emitting relocs. */
6832 elf_section_data (sec)->rel_hdr.sh_size
6833 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6834 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6835 some_edited = TRUE;
6836 }
6837 else if (elf_section_data (sec)->relocs != relstart)
6838 free (relstart);
6839
6840 if (local_syms != NULL
6841 && symtab_hdr->contents != (unsigned char *) local_syms)
6842 {
6843 if (!info->keep_memory)
6844 free (local_syms);
6845 else
6846 symtab_hdr->contents = (unsigned char *) local_syms;
6847 }
6848 }
6849
6850 if (some_edited)
6851 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6852
6853 /* If we are doing a final link and the last .opd entry is just 16 byte
6854 long, add a 8 byte padding after it. */
6855 if (need_pad != NULL && !info->relocatable)
6856 {
6857 bfd_byte *p;
6858
6859 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6860 {
6861 BFD_ASSERT (need_pad->size > 0);
6862
6863 p = bfd_malloc (need_pad->size + 8);
6864 if (p == NULL)
6865 return FALSE;
6866
6867 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6868 p, 0, need_pad->size))
6869 return FALSE;
6870
6871 need_pad->contents = p;
6872 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6873 }
6874 else
6875 {
6876 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6877 if (p == NULL)
6878 return FALSE;
6879
6880 need_pad->contents = p;
6881 }
6882
6883 memset (need_pad->contents + need_pad->size, 0, 8);
6884 need_pad->size += 8;
6885 }
6886
6887 return TRUE;
6888 }
6889
6890 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6891
6892 asection *
6893 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6894 {
6895 struct ppc_link_hash_table *htab;
6896
6897 htab = ppc_hash_table (info);
6898 if (htab->tls_get_addr != NULL)
6899 {
6900 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6901
6902 while (h->elf.root.type == bfd_link_hash_indirect
6903 || h->elf.root.type == bfd_link_hash_warning)
6904 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6905
6906 htab->tls_get_addr = h;
6907
6908 if (htab->tls_get_addr_fd == NULL
6909 && h->oh != NULL
6910 && h->oh->is_func_descriptor
6911 && (h->oh->elf.root.type == bfd_link_hash_defined
6912 || h->oh->elf.root.type == bfd_link_hash_defweak))
6913 htab->tls_get_addr_fd = h->oh;
6914 }
6915
6916 if (htab->tls_get_addr_fd != NULL)
6917 {
6918 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6919
6920 while (h->elf.root.type == bfd_link_hash_indirect
6921 || h->elf.root.type == bfd_link_hash_warning)
6922 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6923
6924 htab->tls_get_addr_fd = h;
6925 }
6926
6927 return _bfd_elf_tls_setup (obfd, info);
6928 }
6929
6930 /* Run through all the TLS relocs looking for optimization
6931 opportunities. The linker has been hacked (see ppc64elf.em) to do
6932 a preliminary section layout so that we know the TLS segment
6933 offsets. We can't optimize earlier because some optimizations need
6934 to know the tp offset, and we need to optimize before allocating
6935 dynamic relocations. */
6936
6937 bfd_boolean
6938 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6939 {
6940 bfd *ibfd;
6941 asection *sec;
6942 struct ppc_link_hash_table *htab;
6943 int pass;
6944
6945 if (info->relocatable || !info->executable)
6946 return TRUE;
6947
6948 htab = ppc_hash_table (info);
6949 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6950 {
6951 Elf_Internal_Sym *locsyms = NULL;
6952 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6953 unsigned char *toc_ref = NULL;
6954
6955 /* Look at all the sections for this file. Make two passes over
6956 the relocs. On the first pass, mark toc entries involved
6957 with tls relocs, and check that tls relocs involved in
6958 setting up a tls_get_addr call are indeed followed by such a
6959 call. If they are not, exclude them from the optimizations
6960 done on the second pass. */
6961 for (pass = 0; pass < 2; ++pass)
6962 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6963 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6964 {
6965 Elf_Internal_Rela *relstart, *rel, *relend;
6966
6967 /* Read the relocations. */
6968 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6969 info->keep_memory);
6970 if (relstart == NULL)
6971 return FALSE;
6972
6973 relend = relstart + sec->reloc_count;
6974 for (rel = relstart; rel < relend; rel++)
6975 {
6976 enum elf_ppc64_reloc_type r_type;
6977 unsigned long r_symndx;
6978 struct elf_link_hash_entry *h;
6979 Elf_Internal_Sym *sym;
6980 asection *sym_sec;
6981 char *tls_mask;
6982 char tls_set, tls_clear, tls_type = 0;
6983 bfd_vma value;
6984 bfd_boolean ok_tprel, is_local;
6985 long toc_ref_index = 0;
6986 int expecting_tls_get_addr = 0;
6987
6988 r_symndx = ELF64_R_SYM (rel->r_info);
6989 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6990 r_symndx, ibfd))
6991 {
6992 err_free_rel:
6993 if (elf_section_data (sec)->relocs != relstart)
6994 free (relstart);
6995 if (toc_ref != NULL)
6996 free (toc_ref);
6997 if (locsyms != NULL
6998 && (elf_symtab_hdr (ibfd).contents
6999 != (unsigned char *) locsyms))
7000 free (locsyms);
7001 return FALSE;
7002 }
7003
7004 if (h != NULL)
7005 {
7006 if (h->root.type != bfd_link_hash_defined
7007 && h->root.type != bfd_link_hash_defweak)
7008 continue;
7009 value = h->root.u.def.value;
7010 }
7011 else
7012 /* Symbols referenced by TLS relocs must be of type
7013 STT_TLS. So no need for .opd local sym adjust. */
7014 value = sym->st_value;
7015
7016 ok_tprel = FALSE;
7017 is_local = FALSE;
7018 if (h == NULL
7019 || !h->def_dynamic)
7020 {
7021 is_local = TRUE;
7022 value += sym_sec->output_offset;
7023 value += sym_sec->output_section->vma;
7024 value -= htab->elf.tls_sec->vma;
7025 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7026 < (bfd_vma) 1 << 32);
7027 }
7028
7029 r_type = ELF64_R_TYPE (rel->r_info);
7030 switch (r_type)
7031 {
7032 case R_PPC64_GOT_TLSLD16:
7033 case R_PPC64_GOT_TLSLD16_LO:
7034 expecting_tls_get_addr = 1;
7035 /* Fall thru */
7036
7037 case R_PPC64_GOT_TLSLD16_HI:
7038 case R_PPC64_GOT_TLSLD16_HA:
7039 /* These relocs should never be against a symbol
7040 defined in a shared lib. Leave them alone if
7041 that turns out to be the case. */
7042 if (!is_local)
7043 continue;
7044
7045 /* LD -> LE */
7046 tls_set = 0;
7047 tls_clear = TLS_LD;
7048 tls_type = TLS_TLS | TLS_LD;
7049 break;
7050
7051 case R_PPC64_GOT_TLSGD16:
7052 case R_PPC64_GOT_TLSGD16_LO:
7053 expecting_tls_get_addr = 1;
7054 /* Fall thru */
7055
7056 case R_PPC64_GOT_TLSGD16_HI:
7057 case R_PPC64_GOT_TLSGD16_HA:
7058 if (ok_tprel)
7059 /* GD -> LE */
7060 tls_set = 0;
7061 else
7062 /* GD -> IE */
7063 tls_set = TLS_TLS | TLS_TPRELGD;
7064 tls_clear = TLS_GD;
7065 tls_type = TLS_TLS | TLS_GD;
7066 break;
7067
7068 case R_PPC64_GOT_TPREL16_DS:
7069 case R_PPC64_GOT_TPREL16_LO_DS:
7070 case R_PPC64_GOT_TPREL16_HI:
7071 case R_PPC64_GOT_TPREL16_HA:
7072 if (ok_tprel)
7073 {
7074 /* IE -> LE */
7075 tls_set = 0;
7076 tls_clear = TLS_TPREL;
7077 tls_type = TLS_TLS | TLS_TPREL;
7078 break;
7079 }
7080 continue;
7081
7082 case R_PPC64_TOC16:
7083 case R_PPC64_TOC16_LO:
7084 case R_PPC64_TLS:
7085 if (sym_sec == NULL || sym_sec != toc)
7086 continue;
7087
7088 /* Mark this toc entry as referenced by a TLS
7089 code sequence. We can do that now in the
7090 case of R_PPC64_TLS, and after checking for
7091 tls_get_addr for the TOC16 relocs. */
7092 if (toc_ref == NULL)
7093 {
7094 toc_ref = bfd_zmalloc (toc->size / 8);
7095 if (toc_ref == NULL)
7096 goto err_free_rel;
7097 }
7098 if (h != NULL)
7099 value = h->root.u.def.value;
7100 else
7101 value = sym->st_value;
7102 value += rel->r_addend;
7103 BFD_ASSERT (value < toc->size && value % 8 == 0);
7104 toc_ref_index = value / 8;
7105 if (r_type == R_PPC64_TLS)
7106 {
7107 toc_ref[toc_ref_index] = 1;
7108 continue;
7109 }
7110
7111 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7112 continue;
7113
7114 tls_set = 0;
7115 tls_clear = 0;
7116 expecting_tls_get_addr = 2;
7117 break;
7118
7119 case R_PPC64_TPREL64:
7120 if (pass == 0
7121 || sec != toc
7122 || toc_ref == NULL
7123 || !toc_ref[rel->r_offset / 8])
7124 continue;
7125 if (ok_tprel)
7126 {
7127 /* IE -> LE */
7128 tls_set = TLS_EXPLICIT;
7129 tls_clear = TLS_TPREL;
7130 break;
7131 }
7132 continue;
7133
7134 case R_PPC64_DTPMOD64:
7135 if (pass == 0
7136 || sec != toc
7137 || toc_ref == NULL
7138 || !toc_ref[rel->r_offset / 8])
7139 continue;
7140 if (rel + 1 < relend
7141 && (rel[1].r_info
7142 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7143 && rel[1].r_offset == rel->r_offset + 8)
7144 {
7145 if (ok_tprel)
7146 /* GD -> LE */
7147 tls_set = TLS_EXPLICIT | TLS_GD;
7148 else
7149 /* GD -> IE */
7150 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7151 tls_clear = TLS_GD;
7152 }
7153 else
7154 {
7155 if (!is_local)
7156 continue;
7157
7158 /* LD -> LE */
7159 tls_set = TLS_EXPLICIT;
7160 tls_clear = TLS_LD;
7161 }
7162 break;
7163
7164 default:
7165 continue;
7166 }
7167
7168 if (pass == 0)
7169 {
7170 if (!expecting_tls_get_addr)
7171 continue;
7172
7173 if (rel + 1 < relend)
7174 {
7175 Elf_Internal_Shdr *symtab_hdr;
7176 enum elf_ppc64_reloc_type r_type2;
7177 unsigned long r_symndx2;
7178 struct elf_link_hash_entry *h2;
7179
7180 symtab_hdr = &elf_symtab_hdr (ibfd);
7181
7182 /* The next instruction should be a call to
7183 __tls_get_addr. Peek at the reloc to be sure. */
7184 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7185 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7186 if (r_symndx2 >= symtab_hdr->sh_info
7187 && (r_type2 == R_PPC64_REL14
7188 || r_type2 == R_PPC64_REL14_BRTAKEN
7189 || r_type2 == R_PPC64_REL14_BRNTAKEN
7190 || r_type2 == R_PPC64_REL24))
7191 {
7192 struct elf_link_hash_entry **sym_hashes;
7193
7194 sym_hashes = elf_sym_hashes (ibfd);
7195
7196 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7197 while (h2->root.type == bfd_link_hash_indirect
7198 || h2->root.type == bfd_link_hash_warning)
7199 h2 = ((struct elf_link_hash_entry *)
7200 h2->root.u.i.link);
7201 if (h2 != NULL
7202 && (h2 == &htab->tls_get_addr->elf
7203 || h2 == &htab->tls_get_addr_fd->elf))
7204 {
7205 if (expecting_tls_get_addr == 2)
7206 {
7207 /* Check for toc tls entries. */
7208 char *toc_tls;
7209 int retval;
7210
7211 retval = get_tls_mask (&toc_tls, NULL,
7212 &locsyms,
7213 rel, ibfd);
7214 if (retval == 0)
7215 goto err_free_rel;
7216 if (retval > 1 && toc_tls != NULL)
7217 toc_ref[toc_ref_index] = 1;
7218 }
7219 continue;
7220 }
7221 }
7222 }
7223
7224 if (expecting_tls_get_addr != 1)
7225 continue;
7226
7227 /* Uh oh, we didn't find the expected call. We
7228 could just mark this symbol to exclude it
7229 from tls optimization but it's safer to skip
7230 the entire section. */
7231 sec->has_tls_reloc = 0;
7232 break;
7233 }
7234
7235 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7236 {
7237 struct plt_entry *ent;
7238 for (ent = htab->tls_get_addr->elf.plt.plist;
7239 ent != NULL;
7240 ent = ent->next)
7241 if (ent->addend == 0)
7242 {
7243 if (ent->plt.refcount > 0)
7244 {
7245 ent->plt.refcount -= 1;
7246 expecting_tls_get_addr = 0;
7247 }
7248 break;
7249 }
7250 }
7251
7252 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7253 {
7254 struct plt_entry *ent;
7255 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7256 ent != NULL;
7257 ent = ent->next)
7258 if (ent->addend == 0)
7259 {
7260 if (ent->plt.refcount > 0)
7261 ent->plt.refcount -= 1;
7262 break;
7263 }
7264 }
7265
7266 if (tls_clear == 0)
7267 continue;
7268
7269 if ((tls_set & TLS_EXPLICIT) == 0)
7270 {
7271 struct got_entry *ent;
7272
7273 /* Adjust got entry for this reloc. */
7274 if (h != NULL)
7275 ent = h->got.glist;
7276 else
7277 ent = elf_local_got_ents (ibfd)[r_symndx];
7278
7279 for (; ent != NULL; ent = ent->next)
7280 if (ent->addend == rel->r_addend
7281 && ent->owner == ibfd
7282 && ent->tls_type == tls_type)
7283 break;
7284 if (ent == NULL)
7285 abort ();
7286
7287 if (tls_set == 0)
7288 {
7289 /* We managed to get rid of a got entry. */
7290 if (ent->got.refcount > 0)
7291 ent->got.refcount -= 1;
7292 }
7293 }
7294 else
7295 {
7296 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7297 we'll lose one or two dyn relocs. */
7298 if (!dec_dynrel_count (rel->r_info, sec, info,
7299 NULL, h, sym_sec))
7300 return FALSE;
7301
7302 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7303 {
7304 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7305 NULL, h, sym_sec))
7306 return FALSE;
7307 }
7308 }
7309
7310 *tls_mask |= tls_set;
7311 *tls_mask &= ~tls_clear;
7312 }
7313
7314 if (elf_section_data (sec)->relocs != relstart)
7315 free (relstart);
7316 }
7317
7318 if (toc_ref != NULL)
7319 free (toc_ref);
7320
7321 if (locsyms != NULL
7322 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7323 {
7324 if (!info->keep_memory)
7325 free (locsyms);
7326 else
7327 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7328 }
7329 }
7330 return TRUE;
7331 }
7332
7333 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7334 the values of any global symbols in a toc section that has been
7335 edited. Globals in toc sections should be a rarity, so this function
7336 sets a flag if any are found in toc sections other than the one just
7337 edited, so that futher hash table traversals can be avoided. */
7338
7339 struct adjust_toc_info
7340 {
7341 asection *toc;
7342 unsigned long *skip;
7343 bfd_boolean global_toc_syms;
7344 };
7345
7346 static bfd_boolean
7347 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7348 {
7349 struct ppc_link_hash_entry *eh;
7350 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7351
7352 if (h->root.type == bfd_link_hash_indirect)
7353 return TRUE;
7354
7355 if (h->root.type == bfd_link_hash_warning)
7356 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7357
7358 if (h->root.type != bfd_link_hash_defined
7359 && h->root.type != bfd_link_hash_defweak)
7360 return TRUE;
7361
7362 eh = (struct ppc_link_hash_entry *) h;
7363 if (eh->adjust_done)
7364 return TRUE;
7365
7366 if (eh->elf.root.u.def.section == toc_inf->toc)
7367 {
7368 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7369 if (skip != (unsigned long) -1)
7370 eh->elf.root.u.def.value -= skip;
7371 else
7372 {
7373 (*_bfd_error_handler)
7374 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7375 eh->elf.root.u.def.section = &bfd_abs_section;
7376 eh->elf.root.u.def.value = 0;
7377 }
7378 eh->adjust_done = 1;
7379 }
7380 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7381 toc_inf->global_toc_syms = TRUE;
7382
7383 return TRUE;
7384 }
7385
7386 /* Examine all relocs referencing .toc sections in order to remove
7387 unused .toc entries. */
7388
7389 bfd_boolean
7390 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7391 {
7392 bfd *ibfd;
7393 struct adjust_toc_info toc_inf;
7394
7395 toc_inf.global_toc_syms = TRUE;
7396 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7397 {
7398 asection *toc, *sec;
7399 Elf_Internal_Shdr *symtab_hdr;
7400 Elf_Internal_Sym *local_syms;
7401 struct elf_link_hash_entry **sym_hashes;
7402 Elf_Internal_Rela *relstart, *rel;
7403 unsigned long *skip, *drop;
7404 unsigned char *used;
7405 unsigned char *keep, last, some_unused;
7406
7407 toc = bfd_get_section_by_name (ibfd, ".toc");
7408 if (toc == NULL
7409 || toc->size == 0
7410 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7411 || elf_discarded_section (toc))
7412 continue;
7413
7414 local_syms = NULL;
7415 symtab_hdr = &elf_symtab_hdr (ibfd);
7416 sym_hashes = elf_sym_hashes (ibfd);
7417
7418 /* Look at sections dropped from the final link. */
7419 skip = NULL;
7420 relstart = NULL;
7421 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7422 {
7423 if (sec->reloc_count == 0
7424 || !elf_discarded_section (sec)
7425 || get_opd_info (sec)
7426 || (sec->flags & SEC_ALLOC) == 0
7427 || (sec->flags & SEC_DEBUGGING) != 0)
7428 continue;
7429
7430 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7431 if (relstart == NULL)
7432 goto error_ret;
7433
7434 /* Run through the relocs to see which toc entries might be
7435 unused. */
7436 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7437 {
7438 enum elf_ppc64_reloc_type r_type;
7439 unsigned long r_symndx;
7440 asection *sym_sec;
7441 struct elf_link_hash_entry *h;
7442 Elf_Internal_Sym *sym;
7443 bfd_vma val;
7444
7445 r_type = ELF64_R_TYPE (rel->r_info);
7446 switch (r_type)
7447 {
7448 default:
7449 continue;
7450
7451 case R_PPC64_TOC16:
7452 case R_PPC64_TOC16_LO:
7453 case R_PPC64_TOC16_HI:
7454 case R_PPC64_TOC16_HA:
7455 case R_PPC64_TOC16_DS:
7456 case R_PPC64_TOC16_LO_DS:
7457 break;
7458 }
7459
7460 r_symndx = ELF64_R_SYM (rel->r_info);
7461 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7462 r_symndx, ibfd))
7463 goto error_ret;
7464
7465 if (sym_sec != toc)
7466 continue;
7467
7468 if (h != NULL)
7469 val = h->root.u.def.value;
7470 else
7471 val = sym->st_value;
7472 val += rel->r_addend;
7473
7474 if (val >= toc->size)
7475 continue;
7476
7477 /* Anything in the toc ought to be aligned to 8 bytes.
7478 If not, don't mark as unused. */
7479 if (val & 7)
7480 continue;
7481
7482 if (skip == NULL)
7483 {
7484 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7485 if (skip == NULL)
7486 goto error_ret;
7487 }
7488
7489 skip[val >> 3] = 1;
7490 }
7491
7492 if (elf_section_data (sec)->relocs != relstart)
7493 free (relstart);
7494 }
7495
7496 if (skip == NULL)
7497 continue;
7498
7499 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7500 if (used == NULL)
7501 {
7502 error_ret:
7503 if (local_syms != NULL
7504 && symtab_hdr->contents != (unsigned char *) local_syms)
7505 free (local_syms);
7506 if (sec != NULL
7507 && relstart != NULL
7508 && elf_section_data (sec)->relocs != relstart)
7509 free (relstart);
7510 if (skip != NULL)
7511 free (skip);
7512 return FALSE;
7513 }
7514
7515 /* Now check all kept sections that might reference the toc.
7516 Check the toc itself last. */
7517 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7518 : ibfd->sections);
7519 sec != NULL;
7520 sec = (sec == toc ? NULL
7521 : sec->next == NULL ? toc
7522 : sec->next == toc && toc->next ? toc->next
7523 : sec->next))
7524 {
7525 int repeat;
7526
7527 if (sec->reloc_count == 0
7528 || elf_discarded_section (sec)
7529 || get_opd_info (sec)
7530 || (sec->flags & SEC_ALLOC) == 0
7531 || (sec->flags & SEC_DEBUGGING) != 0)
7532 continue;
7533
7534 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7535 if (relstart == NULL)
7536 goto error_ret;
7537
7538 /* Mark toc entries referenced as used. */
7539 repeat = 0;
7540 do
7541 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7542 {
7543 enum elf_ppc64_reloc_type r_type;
7544 unsigned long r_symndx;
7545 asection *sym_sec;
7546 struct elf_link_hash_entry *h;
7547 Elf_Internal_Sym *sym;
7548 bfd_vma val;
7549
7550 r_type = ELF64_R_TYPE (rel->r_info);
7551 switch (r_type)
7552 {
7553 case R_PPC64_TOC16:
7554 case R_PPC64_TOC16_LO:
7555 case R_PPC64_TOC16_HI:
7556 case R_PPC64_TOC16_HA:
7557 case R_PPC64_TOC16_DS:
7558 case R_PPC64_TOC16_LO_DS:
7559 /* In case we're taking addresses of toc entries. */
7560 case R_PPC64_ADDR64:
7561 break;
7562
7563 default:
7564 continue;
7565 }
7566
7567 r_symndx = ELF64_R_SYM (rel->r_info);
7568 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7569 r_symndx, ibfd))
7570 {
7571 free (used);
7572 goto error_ret;
7573 }
7574
7575 if (sym_sec != toc)
7576 continue;
7577
7578 if (h != NULL)
7579 val = h->root.u.def.value;
7580 else
7581 val = sym->st_value;
7582 val += rel->r_addend;
7583
7584 if (val >= toc->size)
7585 continue;
7586
7587 /* For the toc section, we only mark as used if
7588 this entry itself isn't unused. */
7589 if (sec == toc
7590 && !used[val >> 3]
7591 && (used[rel->r_offset >> 3]
7592 || !skip[rel->r_offset >> 3]))
7593 /* Do all the relocs again, to catch reference
7594 chains. */
7595 repeat = 1;
7596
7597 used[val >> 3] = 1;
7598 }
7599 while (repeat);
7600 }
7601
7602 /* Merge the used and skip arrays. Assume that TOC
7603 doublewords not appearing as either used or unused belong
7604 to to an entry more than one doubleword in size. */
7605 for (drop = skip, keep = used, last = 0, some_unused = 0;
7606 drop < skip + (toc->size + 7) / 8;
7607 ++drop, ++keep)
7608 {
7609 if (*keep)
7610 {
7611 *drop = 0;
7612 last = 0;
7613 }
7614 else if (*drop)
7615 {
7616 some_unused = 1;
7617 last = 1;
7618 }
7619 else
7620 *drop = last;
7621 }
7622
7623 free (used);
7624
7625 if (some_unused)
7626 {
7627 bfd_byte *contents, *src;
7628 unsigned long off;
7629
7630 /* Shuffle the toc contents, and at the same time convert the
7631 skip array from booleans into offsets. */
7632 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7633 goto error_ret;
7634
7635 elf_section_data (toc)->this_hdr.contents = contents;
7636
7637 for (src = contents, off = 0, drop = skip;
7638 src < contents + toc->size;
7639 src += 8, ++drop)
7640 {
7641 if (*drop)
7642 {
7643 *drop = (unsigned long) -1;
7644 off += 8;
7645 }
7646 else if (off != 0)
7647 {
7648 *drop = off;
7649 memcpy (src - off, src, 8);
7650 }
7651 }
7652 toc->rawsize = toc->size;
7653 toc->size = src - contents - off;
7654
7655 if (toc->reloc_count != 0)
7656 {
7657 Elf_Internal_Rela *wrel;
7658 bfd_size_type sz;
7659
7660 /* Read toc relocs. */
7661 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7662 TRUE);
7663 if (relstart == NULL)
7664 goto error_ret;
7665
7666 /* Remove unused toc relocs, and adjust those we keep. */
7667 wrel = relstart;
7668 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7669 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7670 {
7671 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7672 wrel->r_info = rel->r_info;
7673 wrel->r_addend = rel->r_addend;
7674 ++wrel;
7675 }
7676 else if (!dec_dynrel_count (rel->r_info, toc, info,
7677 &local_syms, NULL, NULL))
7678 goto error_ret;
7679
7680 toc->reloc_count = wrel - relstart;
7681 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7682 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7683 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7684 }
7685
7686 /* Adjust addends for relocs against the toc section sym. */
7687 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7688 {
7689 if (sec->reloc_count == 0
7690 || elf_discarded_section (sec))
7691 continue;
7692
7693 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7694 TRUE);
7695 if (relstart == NULL)
7696 goto error_ret;
7697
7698 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7699 {
7700 enum elf_ppc64_reloc_type r_type;
7701 unsigned long r_symndx;
7702 asection *sym_sec;
7703 struct elf_link_hash_entry *h;
7704 Elf_Internal_Sym *sym;
7705
7706 r_type = ELF64_R_TYPE (rel->r_info);
7707 switch (r_type)
7708 {
7709 default:
7710 continue;
7711
7712 case R_PPC64_TOC16:
7713 case R_PPC64_TOC16_LO:
7714 case R_PPC64_TOC16_HI:
7715 case R_PPC64_TOC16_HA:
7716 case R_PPC64_TOC16_DS:
7717 case R_PPC64_TOC16_LO_DS:
7718 case R_PPC64_ADDR64:
7719 break;
7720 }
7721
7722 r_symndx = ELF64_R_SYM (rel->r_info);
7723 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7724 r_symndx, ibfd))
7725 goto error_ret;
7726
7727 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7728 continue;
7729
7730 rel->r_addend -= skip[rel->r_addend >> 3];
7731 }
7732 }
7733
7734 /* We shouldn't have local or global symbols defined in the TOC,
7735 but handle them anyway. */
7736 if (local_syms != NULL)
7737 {
7738 Elf_Internal_Sym *sym;
7739
7740 for (sym = local_syms;
7741 sym < local_syms + symtab_hdr->sh_info;
7742 ++sym)
7743 if (sym->st_value != 0
7744 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7745 {
7746 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7747 sym->st_value -= skip[sym->st_value >> 3];
7748 else
7749 {
7750 (*_bfd_error_handler)
7751 (_("%s defined in removed toc entry"),
7752 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7753 NULL));
7754 sym->st_value = 0;
7755 sym->st_shndx = SHN_ABS;
7756 }
7757 symtab_hdr->contents = (unsigned char *) local_syms;
7758 }
7759 }
7760
7761 /* Finally, adjust any global syms defined in the toc. */
7762 if (toc_inf.global_toc_syms)
7763 {
7764 toc_inf.toc = toc;
7765 toc_inf.skip = skip;
7766 toc_inf.global_toc_syms = FALSE;
7767 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7768 &toc_inf);
7769 }
7770 }
7771
7772 if (local_syms != NULL
7773 && symtab_hdr->contents != (unsigned char *) local_syms)
7774 {
7775 if (!info->keep_memory)
7776 free (local_syms);
7777 else
7778 symtab_hdr->contents = (unsigned char *) local_syms;
7779 }
7780 free (skip);
7781 }
7782
7783 return TRUE;
7784 }
7785
7786 /* Allocate space in .plt, .got and associated reloc sections for
7787 dynamic relocs. */
7788
7789 static bfd_boolean
7790 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7791 {
7792 struct bfd_link_info *info;
7793 struct ppc_link_hash_table *htab;
7794 asection *s;
7795 struct ppc_link_hash_entry *eh;
7796 struct ppc_dyn_relocs *p;
7797 struct got_entry *gent;
7798
7799 if (h->root.type == bfd_link_hash_indirect)
7800 return TRUE;
7801
7802 if (h->root.type == bfd_link_hash_warning)
7803 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7804
7805 info = (struct bfd_link_info *) inf;
7806 htab = ppc_hash_table (info);
7807
7808 if (htab->elf.dynamic_sections_created
7809 && h->dynindx != -1
7810 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7811 {
7812 struct plt_entry *pent;
7813 bfd_boolean doneone = FALSE;
7814 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7815 if (pent->plt.refcount > 0)
7816 {
7817 /* If this is the first .plt entry, make room for the special
7818 first entry. */
7819 s = htab->plt;
7820 if (s->size == 0)
7821 s->size += PLT_INITIAL_ENTRY_SIZE;
7822
7823 pent->plt.offset = s->size;
7824
7825 /* Make room for this entry. */
7826 s->size += PLT_ENTRY_SIZE;
7827
7828 /* Make room for the .glink code. */
7829 s = htab->glink;
7830 if (s->size == 0)
7831 s->size += GLINK_CALL_STUB_SIZE;
7832 /* We need bigger stubs past index 32767. */
7833 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7834 s->size += 4;
7835 s->size += 2*4;
7836
7837 /* We also need to make an entry in the .rela.plt section. */
7838 s = htab->relplt;
7839 s->size += sizeof (Elf64_External_Rela);
7840 doneone = TRUE;
7841 }
7842 else
7843 pent->plt.offset = (bfd_vma) -1;
7844 if (!doneone)
7845 {
7846 h->plt.plist = NULL;
7847 h->needs_plt = 0;
7848 }
7849 }
7850 else
7851 {
7852 h->plt.plist = NULL;
7853 h->needs_plt = 0;
7854 }
7855
7856 eh = (struct ppc_link_hash_entry *) h;
7857 /* Run through the TLS GD got entries first if we're changing them
7858 to TPREL. */
7859 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7860 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7861 if (gent->got.refcount > 0
7862 && (gent->tls_type & TLS_GD) != 0)
7863 {
7864 /* This was a GD entry that has been converted to TPREL. If
7865 there happens to be a TPREL entry we can use that one. */
7866 struct got_entry *ent;
7867 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7868 if (ent->got.refcount > 0
7869 && (ent->tls_type & TLS_TPREL) != 0
7870 && ent->addend == gent->addend
7871 && ent->owner == gent->owner)
7872 {
7873 gent->got.refcount = 0;
7874 break;
7875 }
7876
7877 /* If not, then we'll be using our own TPREL entry. */
7878 if (gent->got.refcount != 0)
7879 gent->tls_type = TLS_TLS | TLS_TPREL;
7880 }
7881
7882 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7883 if (gent->got.refcount > 0)
7884 {
7885 bfd_boolean dyn;
7886
7887 /* Make sure this symbol is output as a dynamic symbol.
7888 Undefined weak syms won't yet be marked as dynamic,
7889 nor will all TLS symbols. */
7890 if (h->dynindx == -1
7891 && !h->forced_local)
7892 {
7893 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7894 return FALSE;
7895 }
7896
7897 if ((gent->tls_type & TLS_LD) != 0
7898 && !h->def_dynamic)
7899 {
7900 ppc64_tlsld_got (gent->owner)->refcount += 1;
7901 gent->got.offset = (bfd_vma) -1;
7902 continue;
7903 }
7904
7905 if (!is_ppc64_elf (gent->owner))
7906 continue;
7907
7908 s = ppc64_elf_tdata (gent->owner)->got;
7909 gent->got.offset = s->size;
7910 s->size
7911 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7912 dyn = htab->elf.dynamic_sections_created;
7913 if ((info->shared
7914 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7915 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7916 || h->root.type != bfd_link_hash_undefweak))
7917 ppc64_elf_tdata (gent->owner)->relgot->size
7918 += (gent->tls_type & eh->tls_mask & TLS_GD
7919 ? 2 * sizeof (Elf64_External_Rela)
7920 : sizeof (Elf64_External_Rela));
7921 }
7922 else
7923 gent->got.offset = (bfd_vma) -1;
7924
7925 if (eh->dyn_relocs == NULL)
7926 return TRUE;
7927
7928 /* In the shared -Bsymbolic case, discard space allocated for
7929 dynamic pc-relative relocs against symbols which turn out to be
7930 defined in regular objects. For the normal shared case, discard
7931 space for relocs that have become local due to symbol visibility
7932 changes. */
7933
7934 if (info->shared)
7935 {
7936 /* Relocs that use pc_count are those that appear on a call insn,
7937 or certain REL relocs (see must_be_dyn_reloc) that can be
7938 generated via assembly. We want calls to protected symbols to
7939 resolve directly to the function rather than going via the plt.
7940 If people want function pointer comparisons to work as expected
7941 then they should avoid writing weird assembly. */
7942 if (SYMBOL_CALLS_LOCAL (info, h))
7943 {
7944 struct ppc_dyn_relocs **pp;
7945
7946 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7947 {
7948 p->count -= p->pc_count;
7949 p->pc_count = 0;
7950 if (p->count == 0)
7951 *pp = p->next;
7952 else
7953 pp = &p->next;
7954 }
7955 }
7956
7957 /* Also discard relocs on undefined weak syms with non-default
7958 visibility. */
7959 if (eh->dyn_relocs != NULL
7960 && h->root.type == bfd_link_hash_undefweak)
7961 {
7962 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7963 eh->dyn_relocs = NULL;
7964
7965 /* Make sure this symbol is output as a dynamic symbol.
7966 Undefined weak syms won't yet be marked as dynamic. */
7967 else if (h->dynindx == -1
7968 && !h->forced_local)
7969 {
7970 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7971 return FALSE;
7972 }
7973 }
7974 }
7975 else if (ELIMINATE_COPY_RELOCS)
7976 {
7977 /* For the non-shared case, discard space for relocs against
7978 symbols which turn out to need copy relocs or are not
7979 dynamic. */
7980
7981 if (!h->non_got_ref
7982 && h->def_dynamic
7983 && !h->def_regular)
7984 {
7985 /* Make sure this symbol is output as a dynamic symbol.
7986 Undefined weak syms won't yet be marked as dynamic. */
7987 if (h->dynindx == -1
7988 && !h->forced_local)
7989 {
7990 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7991 return FALSE;
7992 }
7993
7994 /* If that succeeded, we know we'll be keeping all the
7995 relocs. */
7996 if (h->dynindx != -1)
7997 goto keep;
7998 }
7999
8000 eh->dyn_relocs = NULL;
8001
8002 keep: ;
8003 }
8004
8005 /* Finally, allocate space. */
8006 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8007 {
8008 asection *sreloc = elf_section_data (p->sec)->sreloc;
8009 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8010 }
8011
8012 return TRUE;
8013 }
8014
8015 /* Find any dynamic relocs that apply to read-only sections. */
8016
8017 static bfd_boolean
8018 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8019 {
8020 struct ppc_link_hash_entry *eh;
8021 struct ppc_dyn_relocs *p;
8022
8023 if (h->root.type == bfd_link_hash_warning)
8024 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8025
8026 eh = (struct ppc_link_hash_entry *) h;
8027 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8028 {
8029 asection *s = p->sec->output_section;
8030
8031 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8032 {
8033 struct bfd_link_info *info = inf;
8034
8035 info->flags |= DF_TEXTREL;
8036
8037 /* Not an error, just cut short the traversal. */
8038 return FALSE;
8039 }
8040 }
8041 return TRUE;
8042 }
8043
8044 /* Set the sizes of the dynamic sections. */
8045
8046 static bfd_boolean
8047 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8048 struct bfd_link_info *info)
8049 {
8050 struct ppc_link_hash_table *htab;
8051 bfd *dynobj;
8052 asection *s;
8053 bfd_boolean relocs;
8054 bfd *ibfd;
8055
8056 htab = ppc_hash_table (info);
8057 dynobj = htab->elf.dynobj;
8058 if (dynobj == NULL)
8059 abort ();
8060
8061 if (htab->elf.dynamic_sections_created)
8062 {
8063 /* Set the contents of the .interp section to the interpreter. */
8064 if (info->executable)
8065 {
8066 s = bfd_get_section_by_name (dynobj, ".interp");
8067 if (s == NULL)
8068 abort ();
8069 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8070 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8071 }
8072 }
8073
8074 /* Set up .got offsets for local syms, and space for local dynamic
8075 relocs. */
8076 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8077 {
8078 struct got_entry **lgot_ents;
8079 struct got_entry **end_lgot_ents;
8080 char *lgot_masks;
8081 bfd_size_type locsymcount;
8082 Elf_Internal_Shdr *symtab_hdr;
8083 asection *srel;
8084
8085 if (!is_ppc64_elf (ibfd))
8086 continue;
8087
8088 for (s = ibfd->sections; s != NULL; s = s->next)
8089 {
8090 struct ppc_dyn_relocs *p;
8091
8092 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8093 {
8094 if (!bfd_is_abs_section (p->sec)
8095 && bfd_is_abs_section (p->sec->output_section))
8096 {
8097 /* Input section has been discarded, either because
8098 it is a copy of a linkonce section or due to
8099 linker script /DISCARD/, so we'll be discarding
8100 the relocs too. */
8101 }
8102 else if (p->count != 0)
8103 {
8104 srel = elf_section_data (p->sec)->sreloc;
8105 srel->size += p->count * sizeof (Elf64_External_Rela);
8106 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8107 info->flags |= DF_TEXTREL;
8108 }
8109 }
8110 }
8111
8112 lgot_ents = elf_local_got_ents (ibfd);
8113 if (!lgot_ents)
8114 continue;
8115
8116 symtab_hdr = &elf_symtab_hdr (ibfd);
8117 locsymcount = symtab_hdr->sh_info;
8118 end_lgot_ents = lgot_ents + locsymcount;
8119 lgot_masks = (char *) end_lgot_ents;
8120 s = ppc64_elf_tdata (ibfd)->got;
8121 srel = ppc64_elf_tdata (ibfd)->relgot;
8122 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8123 {
8124 struct got_entry *ent;
8125
8126 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8127 if (ent->got.refcount > 0)
8128 {
8129 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8130 {
8131 ppc64_tlsld_got (ibfd)->refcount += 1;
8132 ent->got.offset = (bfd_vma) -1;
8133 }
8134 else
8135 {
8136 ent->got.offset = s->size;
8137 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8138 {
8139 s->size += 16;
8140 if (info->shared)
8141 srel->size += 2 * sizeof (Elf64_External_Rela);
8142 }
8143 else
8144 {
8145 s->size += 8;
8146 if (info->shared)
8147 srel->size += sizeof (Elf64_External_Rela);
8148 }
8149 }
8150 }
8151 else
8152 ent->got.offset = (bfd_vma) -1;
8153 }
8154 }
8155
8156 /* Allocate global sym .plt and .got entries, and space for global
8157 sym dynamic relocs. */
8158 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8159
8160 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8161 {
8162 if (!is_ppc64_elf (ibfd))
8163 continue;
8164
8165 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8166 {
8167 s = ppc64_elf_tdata (ibfd)->got;
8168 ppc64_tlsld_got (ibfd)->offset = s->size;
8169 s->size += 16;
8170 if (info->shared)
8171 {
8172 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8173 srel->size += sizeof (Elf64_External_Rela);
8174 }
8175 }
8176 else
8177 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8178 }
8179
8180 /* We now have determined the sizes of the various dynamic sections.
8181 Allocate memory for them. */
8182 relocs = FALSE;
8183 for (s = dynobj->sections; s != NULL; s = s->next)
8184 {
8185 if ((s->flags & SEC_LINKER_CREATED) == 0)
8186 continue;
8187
8188 if (s == htab->brlt || s == htab->relbrlt)
8189 /* These haven't been allocated yet; don't strip. */
8190 continue;
8191 else if (s == htab->got
8192 || s == htab->plt
8193 || s == htab->glink
8194 || s == htab->dynbss)
8195 {
8196 /* Strip this section if we don't need it; see the
8197 comment below. */
8198 }
8199 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8200 {
8201 if (s->size != 0)
8202 {
8203 if (s != htab->relplt)
8204 relocs = TRUE;
8205
8206 /* We use the reloc_count field as a counter if we need
8207 to copy relocs into the output file. */
8208 s->reloc_count = 0;
8209 }
8210 }
8211 else
8212 {
8213 /* It's not one of our sections, so don't allocate space. */
8214 continue;
8215 }
8216
8217 if (s->size == 0)
8218 {
8219 /* If we don't need this section, strip it from the
8220 output file. This is mostly to handle .rela.bss and
8221 .rela.plt. We must create both sections in
8222 create_dynamic_sections, because they must be created
8223 before the linker maps input sections to output
8224 sections. The linker does that before
8225 adjust_dynamic_symbol is called, and it is that
8226 function which decides whether anything needs to go
8227 into these sections. */
8228 s->flags |= SEC_EXCLUDE;
8229 continue;
8230 }
8231
8232 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8233 continue;
8234
8235 /* Allocate memory for the section contents. We use bfd_zalloc
8236 here in case unused entries are not reclaimed before the
8237 section's contents are written out. This should not happen,
8238 but this way if it does we get a R_PPC64_NONE reloc in .rela
8239 sections instead of garbage.
8240 We also rely on the section contents being zero when writing
8241 the GOT. */
8242 s->contents = bfd_zalloc (dynobj, s->size);
8243 if (s->contents == NULL)
8244 return FALSE;
8245 }
8246
8247 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8248 {
8249 if (!is_ppc64_elf (ibfd))
8250 continue;
8251
8252 s = ppc64_elf_tdata (ibfd)->got;
8253 if (s != NULL && s != htab->got)
8254 {
8255 if (s->size == 0)
8256 s->flags |= SEC_EXCLUDE;
8257 else
8258 {
8259 s->contents = bfd_zalloc (ibfd, s->size);
8260 if (s->contents == NULL)
8261 return FALSE;
8262 }
8263 }
8264 s = ppc64_elf_tdata (ibfd)->relgot;
8265 if (s != NULL)
8266 {
8267 if (s->size == 0)
8268 s->flags |= SEC_EXCLUDE;
8269 else
8270 {
8271 s->contents = bfd_zalloc (ibfd, s->size);
8272 if (s->contents == NULL)
8273 return FALSE;
8274 relocs = TRUE;
8275 s->reloc_count = 0;
8276 }
8277 }
8278 }
8279
8280 if (htab->elf.dynamic_sections_created)
8281 {
8282 /* Add some entries to the .dynamic section. We fill in the
8283 values later, in ppc64_elf_finish_dynamic_sections, but we
8284 must add the entries now so that we get the correct size for
8285 the .dynamic section. The DT_DEBUG entry is filled in by the
8286 dynamic linker and used by the debugger. */
8287 #define add_dynamic_entry(TAG, VAL) \
8288 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8289
8290 if (info->executable)
8291 {
8292 if (!add_dynamic_entry (DT_DEBUG, 0))
8293 return FALSE;
8294 }
8295
8296 if (htab->plt != NULL && htab->plt->size != 0)
8297 {
8298 if (!add_dynamic_entry (DT_PLTGOT, 0)
8299 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8300 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8301 || !add_dynamic_entry (DT_JMPREL, 0)
8302 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8303 return FALSE;
8304 }
8305
8306 if (NO_OPD_RELOCS)
8307 {
8308 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8309 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8310 return FALSE;
8311 }
8312
8313 if (relocs)
8314 {
8315 if (!add_dynamic_entry (DT_RELA, 0)
8316 || !add_dynamic_entry (DT_RELASZ, 0)
8317 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8318 return FALSE;
8319
8320 /* If any dynamic relocs apply to a read-only section,
8321 then we need a DT_TEXTREL entry. */
8322 if ((info->flags & DF_TEXTREL) == 0)
8323 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8324
8325 if ((info->flags & DF_TEXTREL) != 0)
8326 {
8327 if (!add_dynamic_entry (DT_TEXTREL, 0))
8328 return FALSE;
8329 }
8330 }
8331 }
8332 #undef add_dynamic_entry
8333
8334 return TRUE;
8335 }
8336
8337 /* Determine the type of stub needed, if any, for a call. */
8338
8339 static inline enum ppc_stub_type
8340 ppc_type_of_stub (asection *input_sec,
8341 const Elf_Internal_Rela *rel,
8342 struct ppc_link_hash_entry **hash,
8343 bfd_vma destination)
8344 {
8345 struct ppc_link_hash_entry *h = *hash;
8346 bfd_vma location;
8347 bfd_vma branch_offset;
8348 bfd_vma max_branch_offset;
8349 enum elf_ppc64_reloc_type r_type;
8350
8351 if (h != NULL)
8352 {
8353 struct ppc_link_hash_entry *fdh = h;
8354 if (fdh->oh != NULL
8355 && fdh->oh->is_func_descriptor)
8356 fdh = fdh->oh;
8357
8358 if (fdh->elf.dynindx != -1)
8359 {
8360 struct plt_entry *ent;
8361
8362 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8363 if (ent->addend == rel->r_addend
8364 && ent->plt.offset != (bfd_vma) -1)
8365 {
8366 *hash = fdh;
8367 return ppc_stub_plt_call;
8368 }
8369 }
8370
8371 /* Here, we know we don't have a plt entry. If we don't have a
8372 either a defined function descriptor or a defined entry symbol
8373 in a regular object file, then it is pointless trying to make
8374 any other type of stub. */
8375 if (!((fdh->elf.root.type == bfd_link_hash_defined
8376 || fdh->elf.root.type == bfd_link_hash_defweak)
8377 && fdh->elf.root.u.def.section->output_section != NULL)
8378 && !((h->elf.root.type == bfd_link_hash_defined
8379 || h->elf.root.type == bfd_link_hash_defweak)
8380 && h->elf.root.u.def.section->output_section != NULL))
8381 return ppc_stub_none;
8382 }
8383
8384 /* Determine where the call point is. */
8385 location = (input_sec->output_offset
8386 + input_sec->output_section->vma
8387 + rel->r_offset);
8388
8389 branch_offset = destination - location;
8390 r_type = ELF64_R_TYPE (rel->r_info);
8391
8392 /* Determine if a long branch stub is needed. */
8393 max_branch_offset = 1 << 25;
8394 if (r_type != R_PPC64_REL24)
8395 max_branch_offset = 1 << 15;
8396
8397 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8398 /* We need a stub. Figure out whether a long_branch or plt_branch
8399 is needed later. */
8400 return ppc_stub_long_branch;
8401
8402 return ppc_stub_none;
8403 }
8404
8405 /* Build a .plt call stub. */
8406
8407 static inline bfd_byte *
8408 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8409 {
8410 #define PPC_LO(v) ((v) & 0xffff)
8411 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8412 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8413
8414 if (PPC_HA (offset) != 0)
8415 {
8416 if (r != NULL)
8417 {
8418 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8419 r[1].r_offset = r[0].r_offset + 8;
8420 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8421 r[1].r_addend = r[0].r_addend;
8422 if (PPC_HA (offset + 16) != PPC_HA (offset))
8423 {
8424 r[2].r_offset = r[1].r_offset + 4;
8425 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
8426 r[2].r_addend = r[0].r_addend;
8427 }
8428 else
8429 {
8430 r[2].r_offset = r[1].r_offset + 8;
8431 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8432 r[2].r_addend = r[0].r_addend + 8;
8433 r[3].r_offset = r[2].r_offset + 4;
8434 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8435 r[3].r_addend = r[0].r_addend + 16;
8436 }
8437 }
8438 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8439 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8440 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8441 if (PPC_HA (offset + 16) != PPC_HA (offset))
8442 {
8443 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8444 offset = 0;
8445 }
8446 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8447 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8448 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8449 bfd_put_32 (obfd, BCTR, p), p += 4;
8450 }
8451 else
8452 {
8453 if (r != NULL)
8454 {
8455 r[0].r_offset += 4;
8456 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8457 if (PPC_HA (offset + 16) != PPC_HA (offset))
8458 {
8459 r[1].r_offset = r[0].r_offset + 4;
8460 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
8461 r[1].r_addend = r[0].r_addend;
8462 }
8463 else
8464 {
8465 r[1].r_offset = r[0].r_offset + 8;
8466 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8467 r[1].r_addend = r[0].r_addend + 16;
8468 r[2].r_offset = r[1].r_offset + 4;
8469 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8470 r[2].r_addend = r[0].r_addend + 8;
8471 }
8472 }
8473 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8474 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8475 if (PPC_HA (offset + 16) != PPC_HA (offset))
8476 {
8477 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8478 offset = 0;
8479 }
8480 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8481 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8482 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8483 bfd_put_32 (obfd, BCTR, p), p += 4;
8484 }
8485 return p;
8486 }
8487
8488 static Elf_Internal_Rela *
8489 get_relocs (asection *sec, int count)
8490 {
8491 Elf_Internal_Rela *relocs;
8492 struct bfd_elf_section_data *elfsec_data;
8493
8494 elfsec_data = elf_section_data (sec);
8495 relocs = elfsec_data->relocs;
8496 if (relocs == NULL)
8497 {
8498 bfd_size_type relsize;
8499 relsize = sec->reloc_count * sizeof (*relocs);
8500 relocs = bfd_alloc (sec->owner, relsize);
8501 if (relocs == NULL)
8502 return NULL;
8503 elfsec_data->relocs = relocs;
8504 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
8505 * sizeof (Elf64_External_Rela));
8506 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8507 sec->reloc_count = 0;
8508 }
8509 relocs += sec->reloc_count;
8510 sec->reloc_count += count;
8511 return relocs;
8512 }
8513
8514 static bfd_boolean
8515 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8516 {
8517 struct ppc_stub_hash_entry *stub_entry;
8518 struct ppc_branch_hash_entry *br_entry;
8519 struct bfd_link_info *info;
8520 struct ppc_link_hash_table *htab;
8521 bfd_byte *loc;
8522 bfd_byte *p;
8523 struct plt_entry *ent;
8524 bfd_vma dest, off;
8525 int size;
8526 Elf_Internal_Rela *r;
8527
8528 /* Massage our args to the form they really have. */
8529 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8530 info = in_arg;
8531
8532 htab = ppc_hash_table (info);
8533
8534 /* Make a note of the offset within the stubs for this entry. */
8535 stub_entry->stub_offset = stub_entry->stub_sec->size;
8536 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8537
8538 htab->stub_count[stub_entry->stub_type - 1] += 1;
8539 switch (stub_entry->stub_type)
8540 {
8541 case ppc_stub_long_branch:
8542 case ppc_stub_long_branch_r2off:
8543 /* Branches are relative. This is where we are going to. */
8544 off = dest = (stub_entry->target_value
8545 + stub_entry->target_section->output_offset
8546 + stub_entry->target_section->output_section->vma);
8547
8548 /* And this is where we are coming from. */
8549 off -= (stub_entry->stub_offset
8550 + stub_entry->stub_sec->output_offset
8551 + stub_entry->stub_sec->output_section->vma);
8552
8553 size = 4;
8554 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8555 {
8556 bfd_vma r2off;
8557
8558 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8559 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8560 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8561 loc += 4;
8562 size = 12;
8563 if (PPC_HA (r2off) != 0)
8564 {
8565 size = 16;
8566 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8567 loc += 4;
8568 }
8569 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8570 loc += 4;
8571 off -= size - 4;
8572 }
8573 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8574
8575 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8576 {
8577 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8578 stub_entry->root.string);
8579 htab->stub_error = TRUE;
8580 return FALSE;
8581 }
8582
8583 if (info->emitrelocations)
8584 {
8585 r = get_relocs (stub_entry->stub_sec, 1);
8586 if (r == NULL)
8587 return FALSE;
8588 r->r_offset = loc - stub_entry->stub_sec->contents;
8589 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8590 r->r_addend = dest;
8591 if (stub_entry->h != NULL)
8592 {
8593 struct elf_link_hash_entry **hashes;
8594 unsigned long symndx;
8595 struct ppc_link_hash_entry *h;
8596
8597 hashes = elf_sym_hashes (htab->stub_bfd);
8598 if (hashes == NULL)
8599 {
8600 bfd_size_type hsize;
8601
8602 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8603 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8604 if (hashes == NULL)
8605 return FALSE;
8606 elf_sym_hashes (htab->stub_bfd) = hashes;
8607 htab->stub_globals = 1;
8608 }
8609 symndx = htab->stub_globals++;
8610 h = stub_entry->h;
8611 hashes[symndx] = &h->elf;
8612 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8613 if (h->oh != NULL && h->oh->is_func)
8614 h = h->oh;
8615 if (h->elf.root.u.def.section != stub_entry->target_section)
8616 /* H is an opd symbol. The addend must be zero. */
8617 r->r_addend = 0;
8618 else
8619 {
8620 off = (h->elf.root.u.def.value
8621 + h->elf.root.u.def.section->output_offset
8622 + h->elf.root.u.def.section->output_section->vma);
8623 r->r_addend -= off;
8624 }
8625 }
8626 }
8627 break;
8628
8629 case ppc_stub_plt_branch:
8630 case ppc_stub_plt_branch_r2off:
8631 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8632 stub_entry->root.string + 9,
8633 FALSE, FALSE);
8634 if (br_entry == NULL)
8635 {
8636 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8637 stub_entry->root.string);
8638 htab->stub_error = TRUE;
8639 return FALSE;
8640 }
8641
8642 dest = (stub_entry->target_value
8643 + stub_entry->target_section->output_offset
8644 + stub_entry->target_section->output_section->vma);
8645
8646 bfd_put_64 (htab->brlt->owner, dest,
8647 htab->brlt->contents + br_entry->offset);
8648
8649 if (br_entry->iter == htab->stub_iteration)
8650 {
8651 br_entry->iter = 0;
8652
8653 if (htab->relbrlt != NULL)
8654 {
8655 /* Create a reloc for the branch lookup table entry. */
8656 Elf_Internal_Rela rela;
8657 bfd_byte *rl;
8658
8659 rela.r_offset = (br_entry->offset
8660 + htab->brlt->output_offset
8661 + htab->brlt->output_section->vma);
8662 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8663 rela.r_addend = dest;
8664
8665 rl = htab->relbrlt->contents;
8666 rl += (htab->relbrlt->reloc_count++
8667 * sizeof (Elf64_External_Rela));
8668 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8669 }
8670 else if (info->emitrelocations)
8671 {
8672 r = get_relocs (htab->brlt, 1);
8673 if (r == NULL)
8674 return FALSE;
8675 /* brlt, being SEC_LINKER_CREATED does not go through the
8676 normal reloc processing. Symbols and offsets are not
8677 translated from input file to output file form, so
8678 set up the offset per the output file. */
8679 r->r_offset = (br_entry->offset
8680 + htab->brlt->output_offset
8681 + htab->brlt->output_section->vma);
8682 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8683 r->r_addend = dest;
8684 }
8685 }
8686
8687 dest = (br_entry->offset
8688 + htab->brlt->output_offset
8689 + htab->brlt->output_section->vma);
8690
8691 off = (dest
8692 - elf_gp (htab->brlt->output_section->owner)
8693 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8694
8695 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8696 {
8697 (*_bfd_error_handler)
8698 (_("linkage table error against `%s'"),
8699 stub_entry->root.string);
8700 bfd_set_error (bfd_error_bad_value);
8701 htab->stub_error = TRUE;
8702 return FALSE;
8703 }
8704
8705 if (info->emitrelocations)
8706 {
8707 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
8708 if (r == NULL)
8709 return FALSE;
8710 r[0].r_offset = loc - stub_entry->stub_sec->contents;
8711 if (bfd_big_endian (info->output_bfd))
8712 r[0].r_offset += 2;
8713 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
8714 r[0].r_offset += 4;
8715 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8716 r[0].r_addend = dest;
8717 if (PPC_HA (off) != 0)
8718 {
8719 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8720 r[1].r_offset = r[0].r_offset + 4;
8721 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8722 r[1].r_addend = r[0].r_addend;
8723 }
8724 }
8725
8726 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8727 {
8728 if (PPC_HA (off) != 0)
8729 {
8730 size = 16;
8731 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
8732 loc += 4;
8733 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
8734 }
8735 else
8736 {
8737 size = 12;
8738 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
8739 }
8740 }
8741 else
8742 {
8743 bfd_vma r2off;
8744
8745 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8746 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8747 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8748 loc += 4;
8749 size = 20;
8750 if (PPC_HA (off) != 0)
8751 {
8752 size += 4;
8753 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
8754 loc += 4;
8755 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
8756 loc += 4;
8757 }
8758 else
8759 {
8760 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
8761 loc += 4;
8762 }
8763
8764 if (PPC_HA (r2off) != 0)
8765 {
8766 size += 4;
8767 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8768 loc += 4;
8769 }
8770 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8771 }
8772 loc += 4;
8773 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8774 loc += 4;
8775 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8776 break;
8777
8778 case ppc_stub_plt_call:
8779 /* Do the best we can for shared libraries built without
8780 exporting ".foo" for each "foo". This can happen when symbol
8781 versioning scripts strip all bar a subset of symbols. */
8782 if (stub_entry->h->oh != NULL
8783 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8784 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8785 {
8786 /* Point the symbol at the stub. There may be multiple stubs,
8787 we don't really care; The main thing is to make this sym
8788 defined somewhere. Maybe defining the symbol in the stub
8789 section is a silly idea. If we didn't do this, htab->top_id
8790 could disappear. */
8791 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8792 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8793 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8794 }
8795
8796 /* Now build the stub. */
8797 dest = (bfd_vma) -1;
8798 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8799 if (ent->addend == stub_entry->addend)
8800 {
8801 dest = ent->plt.offset;
8802 break;
8803 }
8804 if (dest >= (bfd_vma) -2)
8805 abort ();
8806
8807 dest &= ~ (bfd_vma) 1;
8808 dest += (htab->plt->output_offset
8809 + htab->plt->output_section->vma);
8810
8811 off = (dest
8812 - elf_gp (htab->plt->output_section->owner)
8813 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8814
8815 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8816 {
8817 (*_bfd_error_handler)
8818 (_("linkage table error against `%s'"),
8819 stub_entry->h->elf.root.root.string);
8820 bfd_set_error (bfd_error_bad_value);
8821 htab->stub_error = TRUE;
8822 return FALSE;
8823 }
8824
8825 r = NULL;
8826 if (info->emitrelocations)
8827 {
8828 r = get_relocs (stub_entry->stub_sec,
8829 (2 + (PPC_HA (off) != 0)
8830 + (PPC_HA (off + 16) == PPC_HA (off))));
8831 if (r == NULL)
8832 return FALSE;
8833 r[0].r_offset = loc - stub_entry->stub_sec->contents;
8834 if (bfd_big_endian (info->output_bfd))
8835 r[0].r_offset += 2;
8836 r[0].r_addend = dest;
8837 }
8838 p = build_plt_stub (htab->stub_bfd, loc, off, r);
8839 size = p - loc;
8840 break;
8841
8842 default:
8843 BFD_FAIL ();
8844 return FALSE;
8845 }
8846
8847 stub_entry->stub_sec->size += size;
8848
8849 if (htab->emit_stub_syms)
8850 {
8851 struct elf_link_hash_entry *h;
8852 size_t len1, len2;
8853 char *name;
8854 const char *const stub_str[] = { "long_branch",
8855 "long_branch_r2off",
8856 "plt_branch",
8857 "plt_branch_r2off",
8858 "plt_call" };
8859
8860 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8861 len2 = strlen (stub_entry->root.string);
8862 name = bfd_malloc (len1 + len2 + 2);
8863 if (name == NULL)
8864 return FALSE;
8865 memcpy (name, stub_entry->root.string, 9);
8866 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8867 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8868 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8869 if (h == NULL)
8870 return FALSE;
8871 if (h->root.type == bfd_link_hash_new)
8872 {
8873 h->root.type = bfd_link_hash_defined;
8874 h->root.u.def.section = stub_entry->stub_sec;
8875 h->root.u.def.value = stub_entry->stub_offset;
8876 h->ref_regular = 1;
8877 h->def_regular = 1;
8878 h->ref_regular_nonweak = 1;
8879 h->forced_local = 1;
8880 h->non_elf = 0;
8881 }
8882 }
8883
8884 return TRUE;
8885 }
8886
8887 /* As above, but don't actually build the stub. Just bump offset so
8888 we know stub section sizes, and select plt_branch stubs where
8889 long_branch stubs won't do. */
8890
8891 static bfd_boolean
8892 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8893 {
8894 struct ppc_stub_hash_entry *stub_entry;
8895 struct bfd_link_info *info;
8896 struct ppc_link_hash_table *htab;
8897 bfd_vma off;
8898 int size;
8899
8900 /* Massage our args to the form they really have. */
8901 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8902 info = in_arg;
8903
8904 htab = ppc_hash_table (info);
8905
8906 if (stub_entry->stub_type == ppc_stub_plt_call)
8907 {
8908 struct plt_entry *ent;
8909 off = (bfd_vma) -1;
8910 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8911 if (ent->addend == stub_entry->addend)
8912 {
8913 off = ent->plt.offset & ~(bfd_vma) 1;
8914 break;
8915 }
8916 if (off >= (bfd_vma) -2)
8917 abort ();
8918 off += (htab->plt->output_offset
8919 + htab->plt->output_section->vma
8920 - elf_gp (htab->plt->output_section->owner)
8921 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8922
8923 size = PLT_CALL_STUB_SIZE;
8924 if (PPC_HA (off) == 0)
8925 size -= 4;
8926 if (PPC_HA (off + 16) != PPC_HA (off))
8927 size += 4;
8928 if (info->emitrelocations)
8929 {
8930 stub_entry->stub_sec->reloc_count
8931 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
8932 stub_entry->stub_sec->flags |= SEC_RELOC;
8933 }
8934 }
8935 else
8936 {
8937 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8938 variants. */
8939 bfd_vma r2off = 0;
8940
8941 off = (stub_entry->target_value
8942 + stub_entry->target_section->output_offset
8943 + stub_entry->target_section->output_section->vma);
8944 off -= (stub_entry->stub_sec->size
8945 + stub_entry->stub_sec->output_offset
8946 + stub_entry->stub_sec->output_section->vma);
8947
8948 /* Reset the stub type from the plt variant in case we now
8949 can reach with a shorter stub. */
8950 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8951 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8952
8953 size = 4;
8954 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8955 {
8956 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8957 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8958 size = 12;
8959 if (PPC_HA (r2off) != 0)
8960 size = 16;
8961 off -= size - 4;
8962 }
8963
8964 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8965 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8966 {
8967 struct ppc_branch_hash_entry *br_entry;
8968
8969 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8970 stub_entry->root.string + 9,
8971 TRUE, FALSE);
8972 if (br_entry == NULL)
8973 {
8974 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8975 stub_entry->root.string);
8976 htab->stub_error = TRUE;
8977 return FALSE;
8978 }
8979
8980 if (br_entry->iter != htab->stub_iteration)
8981 {
8982 br_entry->iter = htab->stub_iteration;
8983 br_entry->offset = htab->brlt->size;
8984 htab->brlt->size += 8;
8985
8986 if (htab->relbrlt != NULL)
8987 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8988 else if (info->emitrelocations)
8989 {
8990 htab->brlt->reloc_count += 1;
8991 htab->brlt->flags |= SEC_RELOC;
8992 }
8993 }
8994
8995 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8996 off = (br_entry->offset
8997 + htab->brlt->output_offset
8998 + htab->brlt->output_section->vma
8999 - elf_gp (htab->brlt->output_section->owner)
9000 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9001
9002 if (info->emitrelocations)
9003 {
9004 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9005 stub_entry->stub_sec->flags |= SEC_RELOC;
9006 }
9007
9008 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9009 {
9010 size = 12;
9011 if (PPC_HA (off) != 0)
9012 size = 16;
9013 }
9014 else
9015 {
9016 size = 20;
9017 if (PPC_HA (off) != 0)
9018 size += 4;
9019
9020 if (PPC_HA (r2off) != 0)
9021 size += 4;
9022 }
9023 }
9024 else if (info->emitrelocations)
9025 {
9026 stub_entry->stub_sec->reloc_count += 1;
9027 stub_entry->stub_sec->flags |= SEC_RELOC;
9028 }
9029 }
9030
9031 stub_entry->stub_sec->size += size;
9032 return TRUE;
9033 }
9034
9035 /* Set up various things so that we can make a list of input sections
9036 for each output section included in the link. Returns -1 on error,
9037 0 when no stubs will be needed, and 1 on success. */
9038
9039 int
9040 ppc64_elf_setup_section_lists (bfd *output_bfd,
9041 struct bfd_link_info *info,
9042 int no_multi_toc)
9043 {
9044 bfd *input_bfd;
9045 int top_id, top_index, id;
9046 asection *section;
9047 asection **input_list;
9048 bfd_size_type amt;
9049 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9050
9051 htab->no_multi_toc = no_multi_toc;
9052
9053 if (htab->brlt == NULL)
9054 return 0;
9055
9056 /* Find the top input section id. */
9057 for (input_bfd = info->input_bfds, top_id = 3;
9058 input_bfd != NULL;
9059 input_bfd = input_bfd->link_next)
9060 {
9061 for (section = input_bfd->sections;
9062 section != NULL;
9063 section = section->next)
9064 {
9065 if (top_id < section->id)
9066 top_id = section->id;
9067 }
9068 }
9069
9070 htab->top_id = top_id;
9071 amt = sizeof (struct map_stub) * (top_id + 1);
9072 htab->stub_group = bfd_zmalloc (amt);
9073 if (htab->stub_group == NULL)
9074 return -1;
9075
9076 /* Set toc_off for com, und, abs and ind sections. */
9077 for (id = 0; id < 3; id++)
9078 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9079
9080 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
9081
9082 /* We can't use output_bfd->section_count here to find the top output
9083 section index as some sections may have been removed, and
9084 strip_excluded_output_sections doesn't renumber the indices. */
9085 for (section = output_bfd->sections, top_index = 0;
9086 section != NULL;
9087 section = section->next)
9088 {
9089 if (top_index < section->index)
9090 top_index = section->index;
9091 }
9092
9093 htab->top_index = top_index;
9094 amt = sizeof (asection *) * (top_index + 1);
9095 input_list = bfd_zmalloc (amt);
9096 htab->input_list = input_list;
9097 if (input_list == NULL)
9098 return -1;
9099
9100 return 1;
9101 }
9102
9103 /* The linker repeatedly calls this function for each TOC input section
9104 and linker generated GOT section. Group input bfds such that the toc
9105 within a group is less than 64k in size. Will break with cute linker
9106 scripts that play games with dot in the output toc section. */
9107
9108 void
9109 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9110 {
9111 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9112
9113 if (!htab->no_multi_toc)
9114 {
9115 bfd_vma addr = isec->output_offset + isec->output_section->vma;
9116 bfd_vma off = addr - htab->toc_curr;
9117
9118 if (off + isec->size > 0x10000)
9119 htab->toc_curr = addr;
9120
9121 elf_gp (isec->owner) = (htab->toc_curr
9122 - elf_gp (isec->output_section->owner)
9123 + TOC_BASE_OFF);
9124 }
9125 }
9126
9127 /* Called after the last call to the above function. */
9128
9129 void
9130 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
9131 {
9132 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9133
9134 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
9135
9136 /* toc_curr tracks the TOC offset used for code sections below in
9137 ppc64_elf_next_input_section. Start off at 0x8000. */
9138 htab->toc_curr = TOC_BASE_OFF;
9139 }
9140
9141 /* No toc references were found in ISEC. If the code in ISEC makes no
9142 calls, then there's no need to use toc adjusting stubs when branching
9143 into ISEC. Actually, indirect calls from ISEC are OK as they will
9144 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
9145 needed, and 2 if a cyclical call-graph was found but no other reason
9146 for a stub was detected. If called from the top level, a return of
9147 2 means the same as a return of 0. */
9148
9149 static int
9150 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
9151 {
9152 Elf_Internal_Rela *relstart, *rel;
9153 Elf_Internal_Sym *local_syms;
9154 int ret;
9155 struct ppc_link_hash_table *htab;
9156
9157 /* We know none of our code bearing sections will need toc stubs. */
9158 if ((isec->flags & SEC_LINKER_CREATED) != 0)
9159 return 0;
9160
9161 if (isec->size == 0)
9162 return 0;
9163
9164 if (isec->output_section == NULL)
9165 return 0;
9166
9167 if (isec->reloc_count == 0)
9168 return 0;
9169
9170 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
9171 info->keep_memory);
9172 if (relstart == NULL)
9173 return -1;
9174
9175 /* Look for branches to outside of this section. */
9176 local_syms = NULL;
9177 ret = 0;
9178 htab = ppc_hash_table (info);
9179 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
9180 {
9181 enum elf_ppc64_reloc_type r_type;
9182 unsigned long r_symndx;
9183 struct elf_link_hash_entry *h;
9184 Elf_Internal_Sym *sym;
9185 asection *sym_sec;
9186 struct _opd_sec_data *opd;
9187 bfd_vma sym_value;
9188 bfd_vma dest;
9189
9190 r_type = ELF64_R_TYPE (rel->r_info);
9191 if (r_type != R_PPC64_REL24
9192 && r_type != R_PPC64_REL14
9193 && r_type != R_PPC64_REL14_BRTAKEN
9194 && r_type != R_PPC64_REL14_BRNTAKEN)
9195 continue;
9196
9197 r_symndx = ELF64_R_SYM (rel->r_info);
9198 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
9199 isec->owner))
9200 {
9201 ret = -1;
9202 break;
9203 }
9204
9205 /* Calls to dynamic lib functions go through a plt call stub
9206 that uses r2. Branches to undefined symbols might be a call
9207 using old-style dot symbols that can be satisfied by a plt
9208 call into a new-style dynamic library. */
9209 if (sym_sec == NULL)
9210 {
9211 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9212 if (eh != NULL
9213 && eh->oh != NULL
9214 && eh->oh->elf.plt.plist != NULL)
9215 {
9216 ret = 1;
9217 break;
9218 }
9219
9220 /* Ignore other undefined symbols. */
9221 continue;
9222 }
9223
9224 /* Assume branches to other sections not included in the link need
9225 stubs too, to cover -R and absolute syms. */
9226 if (sym_sec->output_section == NULL)
9227 {
9228 ret = 1;
9229 break;
9230 }
9231
9232 if (h == NULL)
9233 sym_value = sym->st_value;
9234 else
9235 {
9236 if (h->root.type != bfd_link_hash_defined
9237 && h->root.type != bfd_link_hash_defweak)
9238 abort ();
9239 sym_value = h->root.u.def.value;
9240 }
9241 sym_value += rel->r_addend;
9242
9243 /* If this branch reloc uses an opd sym, find the code section. */
9244 opd = get_opd_info (sym_sec);
9245 if (opd != NULL)
9246 {
9247 if (h == NULL && opd->adjust != NULL)
9248 {
9249 long adjust;
9250
9251 adjust = opd->adjust[sym->st_value / 8];
9252 if (adjust == -1)
9253 /* Assume deleted functions won't ever be called. */
9254 continue;
9255 sym_value += adjust;
9256 }
9257
9258 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9259 if (dest == (bfd_vma) -1)
9260 continue;
9261 }
9262 else
9263 dest = (sym_value
9264 + sym_sec->output_offset
9265 + sym_sec->output_section->vma);
9266
9267 /* Ignore branch to self. */
9268 if (sym_sec == isec)
9269 continue;
9270
9271 /* If the called function uses the toc, we need a stub. */
9272 if (sym_sec->has_toc_reloc
9273 || sym_sec->makes_toc_func_call)
9274 {
9275 ret = 1;
9276 break;
9277 }
9278
9279 /* Assume any branch that needs a long branch stub might in fact
9280 need a plt_branch stub. A plt_branch stub uses r2. */
9281 else if (dest - (isec->output_offset
9282 + isec->output_section->vma
9283 + rel->r_offset) + (1 << 25) >= (2 << 25))
9284 {
9285 ret = 1;
9286 break;
9287 }
9288
9289 /* If calling back to a section in the process of being tested, we
9290 can't say for sure that no toc adjusting stubs are needed, so
9291 don't return zero. */
9292 else if (sym_sec->call_check_in_progress)
9293 ret = 2;
9294
9295 /* Branches to another section that itself doesn't have any TOC
9296 references are OK. Recursively call ourselves to check. */
9297 else if (sym_sec->id <= htab->top_id
9298 && htab->stub_group[sym_sec->id].toc_off == 0)
9299 {
9300 int recur;
9301
9302 /* Mark current section as indeterminate, so that other
9303 sections that call back to current won't be marked as
9304 known. */
9305 isec->call_check_in_progress = 1;
9306 recur = toc_adjusting_stub_needed (info, sym_sec);
9307 isec->call_check_in_progress = 0;
9308
9309 if (recur < 0)
9310 {
9311 /* An error. Exit. */
9312 ret = -1;
9313 break;
9314 }
9315 else if (recur <= 1)
9316 {
9317 /* Known result. Mark as checked and set section flag. */
9318 htab->stub_group[sym_sec->id].toc_off = 1;
9319 if (recur != 0)
9320 {
9321 sym_sec->makes_toc_func_call = 1;
9322 ret = 1;
9323 break;
9324 }
9325 }
9326 else
9327 {
9328 /* Unknown result. Continue checking. */
9329 ret = 2;
9330 }
9331 }
9332 }
9333
9334 if (local_syms != NULL
9335 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9336 free (local_syms);
9337 if (elf_section_data (isec)->relocs != relstart)
9338 free (relstart);
9339
9340 return ret;
9341 }
9342
9343 /* The linker repeatedly calls this function for each input section,
9344 in the order that input sections are linked into output sections.
9345 Build lists of input sections to determine groupings between which
9346 we may insert linker stubs. */
9347
9348 bfd_boolean
9349 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9350 {
9351 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9352
9353 if ((isec->output_section->flags & SEC_CODE) != 0
9354 && isec->output_section->index <= htab->top_index)
9355 {
9356 asection **list = htab->input_list + isec->output_section->index;
9357 /* Steal the link_sec pointer for our list. */
9358 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9359 /* This happens to make the list in reverse order,
9360 which is what we want. */
9361 PREV_SEC (isec) = *list;
9362 *list = isec;
9363 }
9364
9365 if (htab->multi_toc_needed)
9366 {
9367 /* If a code section has a function that uses the TOC then we need
9368 to use the right TOC (obviously). Also, make sure that .opd gets
9369 the correct TOC value for R_PPC64_TOC relocs that don't have or
9370 can't find their function symbol (shouldn't ever happen now).
9371 Also specially treat .fixup for the linux kernel. .fixup
9372 contains branches, but only back to the function that hit an
9373 exception. */
9374 if (isec->has_toc_reloc
9375 || (isec->flags & SEC_CODE) == 0
9376 || strcmp (isec->name, ".fixup") == 0)
9377 {
9378 if (elf_gp (isec->owner) != 0)
9379 htab->toc_curr = elf_gp (isec->owner);
9380 }
9381 else if (htab->stub_group[isec->id].toc_off == 0)
9382 {
9383 int ret = toc_adjusting_stub_needed (info, isec);
9384 if (ret < 0)
9385 return FALSE;
9386 else
9387 isec->makes_toc_func_call = ret & 1;
9388 }
9389 }
9390
9391 /* Functions that don't use the TOC can belong in any TOC group.
9392 Use the last TOC base. This happens to make _init and _fini
9393 pasting work. */
9394 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9395 return TRUE;
9396 }
9397
9398 /* See whether we can group stub sections together. Grouping stub
9399 sections may result in fewer stubs. More importantly, we need to
9400 put all .init* and .fini* stubs at the beginning of the .init or
9401 .fini output sections respectively, because glibc splits the
9402 _init and _fini functions into multiple parts. Putting a stub in
9403 the middle of a function is not a good idea. */
9404
9405 static void
9406 group_sections (struct ppc_link_hash_table *htab,
9407 bfd_size_type stub_group_size,
9408 bfd_boolean stubs_always_before_branch)
9409 {
9410 asection **list;
9411 bfd_size_type stub14_group_size;
9412 bfd_boolean suppress_size_errors;
9413
9414 suppress_size_errors = FALSE;
9415 stub14_group_size = stub_group_size;
9416 if (stub_group_size == 1)
9417 {
9418 /* Default values. */
9419 if (stubs_always_before_branch)
9420 {
9421 stub_group_size = 0x1e00000;
9422 stub14_group_size = 0x7800;
9423 }
9424 else
9425 {
9426 stub_group_size = 0x1c00000;
9427 stub14_group_size = 0x7000;
9428 }
9429 suppress_size_errors = TRUE;
9430 }
9431
9432 list = htab->input_list + htab->top_index;
9433 do
9434 {
9435 asection *tail = *list;
9436 while (tail != NULL)
9437 {
9438 asection *curr;
9439 asection *prev;
9440 bfd_size_type total;
9441 bfd_boolean big_sec;
9442 bfd_vma curr_toc;
9443
9444 curr = tail;
9445 total = tail->size;
9446 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9447 ? stub14_group_size : stub_group_size);
9448 if (big_sec && !suppress_size_errors)
9449 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9450 tail->owner, tail);
9451 curr_toc = htab->stub_group[tail->id].toc_off;
9452
9453 while ((prev = PREV_SEC (curr)) != NULL
9454 && ((total += curr->output_offset - prev->output_offset)
9455 < (ppc64_elf_section_data (prev)->has_14bit_branch
9456 ? stub14_group_size : stub_group_size))
9457 && htab->stub_group[prev->id].toc_off == curr_toc)
9458 curr = prev;
9459
9460 /* OK, the size from the start of CURR to the end is less
9461 than stub_group_size and thus can be handled by one stub
9462 section. (or the tail section is itself larger than
9463 stub_group_size, in which case we may be toast.) We
9464 should really be keeping track of the total size of stubs
9465 added here, as stubs contribute to the final output
9466 section size. That's a little tricky, and this way will
9467 only break if stubs added make the total size more than
9468 2^25, ie. for the default stub_group_size, if stubs total
9469 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9470 do
9471 {
9472 prev = PREV_SEC (tail);
9473 /* Set up this stub group. */
9474 htab->stub_group[tail->id].link_sec = curr;
9475 }
9476 while (tail != curr && (tail = prev) != NULL);
9477
9478 /* But wait, there's more! Input sections up to stub_group_size
9479 bytes before the stub section can be handled by it too.
9480 Don't do this if we have a really large section after the
9481 stubs, as adding more stubs increases the chance that
9482 branches may not reach into the stub section. */
9483 if (!stubs_always_before_branch && !big_sec)
9484 {
9485 total = 0;
9486 while (prev != NULL
9487 && ((total += tail->output_offset - prev->output_offset)
9488 < (ppc64_elf_section_data (prev)->has_14bit_branch
9489 ? stub14_group_size : stub_group_size))
9490 && htab->stub_group[prev->id].toc_off == curr_toc)
9491 {
9492 tail = prev;
9493 prev = PREV_SEC (tail);
9494 htab->stub_group[tail->id].link_sec = curr;
9495 }
9496 }
9497 tail = prev;
9498 }
9499 }
9500 while (list-- != htab->input_list);
9501 free (htab->input_list);
9502 #undef PREV_SEC
9503 }
9504
9505 /* Determine and set the size of the stub section for a final link.
9506
9507 The basic idea here is to examine all the relocations looking for
9508 PC-relative calls to a target that is unreachable with a "bl"
9509 instruction. */
9510
9511 bfd_boolean
9512 ppc64_elf_size_stubs (bfd *output_bfd,
9513 struct bfd_link_info *info,
9514 bfd_signed_vma group_size,
9515 asection *(*add_stub_section) (const char *, asection *),
9516 void (*layout_sections_again) (void))
9517 {
9518 bfd_size_type stub_group_size;
9519 bfd_boolean stubs_always_before_branch;
9520 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9521
9522 /* Stash our params away. */
9523 htab->add_stub_section = add_stub_section;
9524 htab->layout_sections_again = layout_sections_again;
9525 stubs_always_before_branch = group_size < 0;
9526 if (group_size < 0)
9527 stub_group_size = -group_size;
9528 else
9529 stub_group_size = group_size;
9530
9531 group_sections (htab, stub_group_size, stubs_always_before_branch);
9532
9533 while (1)
9534 {
9535 bfd *input_bfd;
9536 unsigned int bfd_indx;
9537 asection *stub_sec;
9538
9539 htab->stub_iteration += 1;
9540
9541 for (input_bfd = info->input_bfds, bfd_indx = 0;
9542 input_bfd != NULL;
9543 input_bfd = input_bfd->link_next, bfd_indx++)
9544 {
9545 Elf_Internal_Shdr *symtab_hdr;
9546 asection *section;
9547 Elf_Internal_Sym *local_syms = NULL;
9548
9549 if (!is_ppc64_elf (input_bfd))
9550 continue;
9551
9552 /* We'll need the symbol table in a second. */
9553 symtab_hdr = &elf_symtab_hdr (input_bfd);
9554 if (symtab_hdr->sh_info == 0)
9555 continue;
9556
9557 /* Walk over each section attached to the input bfd. */
9558 for (section = input_bfd->sections;
9559 section != NULL;
9560 section = section->next)
9561 {
9562 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9563
9564 /* If there aren't any relocs, then there's nothing more
9565 to do. */
9566 if ((section->flags & SEC_RELOC) == 0
9567 || (section->flags & SEC_ALLOC) == 0
9568 || (section->flags & SEC_LOAD) == 0
9569 || (section->flags & SEC_CODE) == 0
9570 || section->reloc_count == 0)
9571 continue;
9572
9573 /* If this section is a link-once section that will be
9574 discarded, then don't create any stubs. */
9575 if (section->output_section == NULL
9576 || section->output_section->owner != output_bfd)
9577 continue;
9578
9579 /* Get the relocs. */
9580 internal_relocs
9581 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9582 info->keep_memory);
9583 if (internal_relocs == NULL)
9584 goto error_ret_free_local;
9585
9586 /* Now examine each relocation. */
9587 irela = internal_relocs;
9588 irelaend = irela + section->reloc_count;
9589 for (; irela < irelaend; irela++)
9590 {
9591 enum elf_ppc64_reloc_type r_type;
9592 unsigned int r_indx;
9593 enum ppc_stub_type stub_type;
9594 struct ppc_stub_hash_entry *stub_entry;
9595 asection *sym_sec, *code_sec;
9596 bfd_vma sym_value;
9597 bfd_vma destination;
9598 bfd_boolean ok_dest;
9599 struct ppc_link_hash_entry *hash;
9600 struct ppc_link_hash_entry *fdh;
9601 struct elf_link_hash_entry *h;
9602 Elf_Internal_Sym *sym;
9603 char *stub_name;
9604 const asection *id_sec;
9605 struct _opd_sec_data *opd;
9606
9607 r_type = ELF64_R_TYPE (irela->r_info);
9608 r_indx = ELF64_R_SYM (irela->r_info);
9609
9610 if (r_type >= R_PPC64_max)
9611 {
9612 bfd_set_error (bfd_error_bad_value);
9613 goto error_ret_free_internal;
9614 }
9615
9616 /* Only look for stubs on branch instructions. */
9617 if (r_type != R_PPC64_REL24
9618 && r_type != R_PPC64_REL14
9619 && r_type != R_PPC64_REL14_BRTAKEN
9620 && r_type != R_PPC64_REL14_BRNTAKEN)
9621 continue;
9622
9623 /* Now determine the call target, its name, value,
9624 section. */
9625 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9626 r_indx, input_bfd))
9627 goto error_ret_free_internal;
9628 hash = (struct ppc_link_hash_entry *) h;
9629
9630 ok_dest = FALSE;
9631 fdh = NULL;
9632 sym_value = 0;
9633 if (hash == NULL)
9634 {
9635 sym_value = sym->st_value;
9636 ok_dest = TRUE;
9637 }
9638 else if (hash->elf.root.type == bfd_link_hash_defined
9639 || hash->elf.root.type == bfd_link_hash_defweak)
9640 {
9641 sym_value = hash->elf.root.u.def.value;
9642 if (sym_sec->output_section != NULL)
9643 ok_dest = TRUE;
9644 }
9645 else if (hash->elf.root.type == bfd_link_hash_undefweak
9646 || hash->elf.root.type == bfd_link_hash_undefined)
9647 {
9648 /* Recognise an old ABI func code entry sym, and
9649 use the func descriptor sym instead if it is
9650 defined. */
9651 if (hash->elf.root.root.string[0] == '.'
9652 && (fdh = get_fdh (hash, htab)) != NULL)
9653 {
9654 if (fdh->elf.root.type == bfd_link_hash_defined
9655 || fdh->elf.root.type == bfd_link_hash_defweak)
9656 {
9657 sym_sec = fdh->elf.root.u.def.section;
9658 sym_value = fdh->elf.root.u.def.value;
9659 if (sym_sec->output_section != NULL)
9660 ok_dest = TRUE;
9661 }
9662 else
9663 fdh = NULL;
9664 }
9665 }
9666 else
9667 {
9668 bfd_set_error (bfd_error_bad_value);
9669 goto error_ret_free_internal;
9670 }
9671
9672 destination = 0;
9673 if (ok_dest)
9674 {
9675 sym_value += irela->r_addend;
9676 destination = (sym_value
9677 + sym_sec->output_offset
9678 + sym_sec->output_section->vma);
9679 }
9680
9681 code_sec = sym_sec;
9682 opd = get_opd_info (sym_sec);
9683 if (opd != NULL)
9684 {
9685 bfd_vma dest;
9686
9687 if (hash == NULL && opd->adjust != NULL)
9688 {
9689 long adjust = opd->adjust[sym_value / 8];
9690 if (adjust == -1)
9691 continue;
9692 sym_value += adjust;
9693 }
9694 dest = opd_entry_value (sym_sec, sym_value,
9695 &code_sec, &sym_value);
9696 if (dest != (bfd_vma) -1)
9697 {
9698 destination = dest;
9699 if (fdh != NULL)
9700 {
9701 /* Fixup old ABI sym to point at code
9702 entry. */
9703 hash->elf.root.type = bfd_link_hash_defweak;
9704 hash->elf.root.u.def.section = code_sec;
9705 hash->elf.root.u.def.value = sym_value;
9706 }
9707 }
9708 }
9709
9710 /* Determine what (if any) linker stub is needed. */
9711 stub_type = ppc_type_of_stub (section, irela, &hash,
9712 destination);
9713
9714 if (stub_type != ppc_stub_plt_call)
9715 {
9716 /* Check whether we need a TOC adjusting stub.
9717 Since the linker pastes together pieces from
9718 different object files when creating the
9719 _init and _fini functions, it may be that a
9720 call to what looks like a local sym is in
9721 fact a call needing a TOC adjustment. */
9722 if (code_sec != NULL
9723 && code_sec->output_section != NULL
9724 && (htab->stub_group[code_sec->id].toc_off
9725 != htab->stub_group[section->id].toc_off)
9726 && (code_sec->has_toc_reloc
9727 || code_sec->makes_toc_func_call))
9728 stub_type = ppc_stub_long_branch_r2off;
9729 }
9730
9731 if (stub_type == ppc_stub_none)
9732 continue;
9733
9734 /* __tls_get_addr calls might be eliminated. */
9735 if (stub_type != ppc_stub_plt_call
9736 && hash != NULL
9737 && (hash == htab->tls_get_addr
9738 || hash == htab->tls_get_addr_fd)
9739 && section->has_tls_reloc
9740 && irela != internal_relocs)
9741 {
9742 /* Get tls info. */
9743 char *tls_mask;
9744
9745 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9746 irela - 1, input_bfd))
9747 goto error_ret_free_internal;
9748 if (*tls_mask != 0)
9749 continue;
9750 }
9751
9752 /* Support for grouping stub sections. */
9753 id_sec = htab->stub_group[section->id].link_sec;
9754
9755 /* Get the name of this stub. */
9756 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9757 if (!stub_name)
9758 goto error_ret_free_internal;
9759
9760 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9761 stub_name, FALSE, FALSE);
9762 if (stub_entry != NULL)
9763 {
9764 /* The proper stub has already been created. */
9765 free (stub_name);
9766 continue;
9767 }
9768
9769 stub_entry = ppc_add_stub (stub_name, section, htab);
9770 if (stub_entry == NULL)
9771 {
9772 free (stub_name);
9773 error_ret_free_internal:
9774 if (elf_section_data (section)->relocs == NULL)
9775 free (internal_relocs);
9776 error_ret_free_local:
9777 if (local_syms != NULL
9778 && (symtab_hdr->contents
9779 != (unsigned char *) local_syms))
9780 free (local_syms);
9781 return FALSE;
9782 }
9783
9784 stub_entry->stub_type = stub_type;
9785 stub_entry->target_value = sym_value;
9786 stub_entry->target_section = code_sec;
9787 stub_entry->h = hash;
9788 stub_entry->addend = irela->r_addend;
9789
9790 if (stub_entry->h != NULL)
9791 htab->stub_globals += 1;
9792 }
9793
9794 /* We're done with the internal relocs, free them. */
9795 if (elf_section_data (section)->relocs != internal_relocs)
9796 free (internal_relocs);
9797 }
9798
9799 if (local_syms != NULL
9800 && symtab_hdr->contents != (unsigned char *) local_syms)
9801 {
9802 if (!info->keep_memory)
9803 free (local_syms);
9804 else
9805 symtab_hdr->contents = (unsigned char *) local_syms;
9806 }
9807 }
9808
9809 /* We may have added some stubs. Find out the new size of the
9810 stub sections. */
9811 for (stub_sec = htab->stub_bfd->sections;
9812 stub_sec != NULL;
9813 stub_sec = stub_sec->next)
9814 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9815 {
9816 stub_sec->rawsize = stub_sec->size;
9817 stub_sec->size = 0;
9818 stub_sec->reloc_count = 0;
9819 stub_sec->flags &= ~SEC_RELOC;
9820 }
9821
9822 htab->brlt->size = 0;
9823 htab->brlt->reloc_count = 0;
9824 htab->brlt->flags &= ~SEC_RELOC;
9825 if (htab->relbrlt != NULL)
9826 htab->relbrlt->size = 0;
9827
9828 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9829
9830 if (info->emitrelocations
9831 && htab->glink != NULL && htab->glink->size != 0)
9832 {
9833 htab->glink->reloc_count = 1;
9834 htab->glink->flags |= SEC_RELOC;
9835 }
9836
9837 for (stub_sec = htab->stub_bfd->sections;
9838 stub_sec != NULL;
9839 stub_sec = stub_sec->next)
9840 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9841 && stub_sec->rawsize != stub_sec->size)
9842 break;
9843
9844 /* Exit from this loop when no stubs have been added, and no stubs
9845 have changed size. */
9846 if (stub_sec == NULL)
9847 break;
9848
9849 /* Ask the linker to do its stuff. */
9850 (*htab->layout_sections_again) ();
9851 }
9852
9853 /* It would be nice to strip htab->brlt from the output if the
9854 section is empty, but it's too late. If we strip sections here,
9855 the dynamic symbol table is corrupted since the section symbol
9856 for the stripped section isn't written. */
9857
9858 return TRUE;
9859 }
9860
9861 /* Called after we have determined section placement. If sections
9862 move, we'll be called again. Provide a value for TOCstart. */
9863
9864 bfd_vma
9865 ppc64_elf_toc (bfd *obfd)
9866 {
9867 asection *s;
9868 bfd_vma TOCstart;
9869
9870 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9871 order. The TOC starts where the first of these sections starts. */
9872 s = bfd_get_section_by_name (obfd, ".got");
9873 if (s == NULL)
9874 s = bfd_get_section_by_name (obfd, ".toc");
9875 if (s == NULL)
9876 s = bfd_get_section_by_name (obfd, ".tocbss");
9877 if (s == NULL)
9878 s = bfd_get_section_by_name (obfd, ".plt");
9879 if (s == NULL)
9880 {
9881 /* This may happen for
9882 o references to TOC base (SYM@toc / TOC[tc0]) without a
9883 .toc directive
9884 o bad linker script
9885 o --gc-sections and empty TOC sections
9886
9887 FIXME: Warn user? */
9888
9889 /* Look for a likely section. We probably won't even be
9890 using TOCstart. */
9891 for (s = obfd->sections; s != NULL; s = s->next)
9892 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9893 == (SEC_ALLOC | SEC_SMALL_DATA))
9894 break;
9895 if (s == NULL)
9896 for (s = obfd->sections; s != NULL; s = s->next)
9897 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9898 == (SEC_ALLOC | SEC_SMALL_DATA))
9899 break;
9900 if (s == NULL)
9901 for (s = obfd->sections; s != NULL; s = s->next)
9902 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9903 break;
9904 if (s == NULL)
9905 for (s = obfd->sections; s != NULL; s = s->next)
9906 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9907 break;
9908 }
9909
9910 TOCstart = 0;
9911 if (s != NULL)
9912 TOCstart = s->output_section->vma + s->output_offset;
9913
9914 return TOCstart;
9915 }
9916
9917 /* Build all the stubs associated with the current output file.
9918 The stubs are kept in a hash table attached to the main linker
9919 hash table. This function is called via gldelf64ppc_finish. */
9920
9921 bfd_boolean
9922 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9923 struct bfd_link_info *info,
9924 char **stats)
9925 {
9926 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9927 asection *stub_sec;
9928 bfd_byte *p;
9929 int stub_sec_count = 0;
9930
9931 htab->emit_stub_syms = emit_stub_syms;
9932
9933 /* Allocate memory to hold the linker stubs. */
9934 for (stub_sec = htab->stub_bfd->sections;
9935 stub_sec != NULL;
9936 stub_sec = stub_sec->next)
9937 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9938 && stub_sec->size != 0)
9939 {
9940 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9941 if (stub_sec->contents == NULL)
9942 return FALSE;
9943 /* We want to check that built size is the same as calculated
9944 size. rawsize is a convenient location to use. */
9945 stub_sec->rawsize = stub_sec->size;
9946 stub_sec->size = 0;
9947 }
9948
9949 if (htab->glink != NULL && htab->glink->size != 0)
9950 {
9951 unsigned int indx;
9952 bfd_vma plt0;
9953
9954 /* Build the .glink plt call stub. */
9955 if (htab->emit_stub_syms)
9956 {
9957 struct elf_link_hash_entry *h;
9958 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
9959 TRUE, FALSE, FALSE);
9960 if (h == NULL)
9961 return FALSE;
9962 if (h->root.type == bfd_link_hash_new)
9963 {
9964 h->root.type = bfd_link_hash_defined;
9965 h->root.u.def.section = htab->glink;
9966 h->root.u.def.value = 8;
9967 h->ref_regular = 1;
9968 h->def_regular = 1;
9969 h->ref_regular_nonweak = 1;
9970 h->forced_local = 1;
9971 h->non_elf = 0;
9972 }
9973 }
9974 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
9975 if (info->emitrelocations)
9976 {
9977 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
9978 if (r == NULL)
9979 return FALSE;
9980 r->r_offset = (htab->glink->output_offset
9981 + htab->glink->output_section->vma);
9982 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
9983 r->r_addend = plt0;
9984 }
9985 p = htab->glink->contents;
9986 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
9987 bfd_put_64 (htab->glink->owner, plt0, p);
9988 p += 8;
9989 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9990 p += 4;
9991 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9992 p += 4;
9993 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9994 p += 4;
9995 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9996 p += 4;
9997 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9998 p += 4;
9999 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
10000 p += 4;
10001 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
10002 p += 4;
10003 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
10004 p += 4;
10005 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
10006 p += 4;
10007 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
10008 p += 4;
10009 bfd_put_32 (htab->glink->owner, BCTR, p);
10010 p += 4;
10011 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
10012 {
10013 bfd_put_32 (htab->glink->owner, NOP, p);
10014 p += 4;
10015 }
10016
10017 /* Build the .glink lazy link call stubs. */
10018 indx = 0;
10019 while (p < htab->glink->contents + htab->glink->size)
10020 {
10021 if (indx < 0x8000)
10022 {
10023 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
10024 p += 4;
10025 }
10026 else
10027 {
10028 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
10029 p += 4;
10030 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
10031 p += 4;
10032 }
10033 bfd_put_32 (htab->glink->owner,
10034 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
10035 indx++;
10036 p += 4;
10037 }
10038 htab->glink->rawsize = p - htab->glink->contents;
10039 }
10040
10041 if (htab->brlt->size != 0)
10042 {
10043 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
10044 htab->brlt->size);
10045 if (htab->brlt->contents == NULL)
10046 return FALSE;
10047 }
10048 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
10049 {
10050 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
10051 htab->relbrlt->size);
10052 if (htab->relbrlt->contents == NULL)
10053 return FALSE;
10054 }
10055
10056 /* Build the stubs as directed by the stub hash table. */
10057 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
10058
10059 if (htab->relbrlt != NULL)
10060 htab->relbrlt->reloc_count = 0;
10061
10062 for (stub_sec = htab->stub_bfd->sections;
10063 stub_sec != NULL;
10064 stub_sec = stub_sec->next)
10065 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10066 {
10067 stub_sec_count += 1;
10068 if (stub_sec->rawsize != stub_sec->size)
10069 break;
10070 }
10071
10072 if (stub_sec != NULL
10073 || htab->glink->rawsize != htab->glink->size)
10074 {
10075 htab->stub_error = TRUE;
10076 (*_bfd_error_handler) (_("stubs don't match calculated size"));
10077 }
10078
10079 if (htab->stub_error)
10080 return FALSE;
10081
10082 if (stats != NULL)
10083 {
10084 *stats = bfd_malloc (500);
10085 if (*stats == NULL)
10086 return FALSE;
10087
10088 sprintf (*stats, _("linker stubs in %u group%s\n"
10089 " branch %lu\n"
10090 " toc adjust %lu\n"
10091 " long branch %lu\n"
10092 " long toc adj %lu\n"
10093 " plt call %lu"),
10094 stub_sec_count,
10095 stub_sec_count == 1 ? "" : "s",
10096 htab->stub_count[ppc_stub_long_branch - 1],
10097 htab->stub_count[ppc_stub_long_branch_r2off - 1],
10098 htab->stub_count[ppc_stub_plt_branch - 1],
10099 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
10100 htab->stub_count[ppc_stub_plt_call - 1]);
10101 }
10102 return TRUE;
10103 }
10104
10105 /* This function undoes the changes made by add_symbol_adjust. */
10106
10107 static bfd_boolean
10108 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10109 {
10110 struct ppc_link_hash_entry *eh;
10111
10112 if (h->root.type == bfd_link_hash_indirect)
10113 return TRUE;
10114
10115 if (h->root.type == bfd_link_hash_warning)
10116 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10117
10118 eh = (struct ppc_link_hash_entry *) h;
10119 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
10120 return TRUE;
10121
10122 eh->elf.root.type = bfd_link_hash_undefined;
10123 return TRUE;
10124 }
10125
10126 void
10127 ppc64_elf_restore_symbols (struct bfd_link_info *info)
10128 {
10129 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10130 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
10131 }
10132
10133 /* What to do when ld finds relocations against symbols defined in
10134 discarded sections. */
10135
10136 static unsigned int
10137 ppc64_elf_action_discarded (asection *sec)
10138 {
10139 if (strcmp (".opd", sec->name) == 0)
10140 return 0;
10141
10142 if (strcmp (".toc", sec->name) == 0)
10143 return 0;
10144
10145 if (strcmp (".toc1", sec->name) == 0)
10146 return 0;
10147
10148 return _bfd_elf_default_action_discarded (sec);
10149 }
10150
10151 /* The RELOCATE_SECTION function is called by the ELF backend linker
10152 to handle the relocations for a section.
10153
10154 The relocs are always passed as Rela structures; if the section
10155 actually uses Rel structures, the r_addend field will always be
10156 zero.
10157
10158 This function is responsible for adjust the section contents as
10159 necessary, and (if using Rela relocs and generating a
10160 relocatable output file) adjusting the reloc addend as
10161 necessary.
10162
10163 This function does not have to worry about setting the reloc
10164 address or the reloc symbol index.
10165
10166 LOCAL_SYMS is a pointer to the swapped in local symbols.
10167
10168 LOCAL_SECTIONS is an array giving the section in the input file
10169 corresponding to the st_shndx field of each local symbol.
10170
10171 The global hash table entry for the global symbols can be found
10172 via elf_sym_hashes (input_bfd).
10173
10174 When generating relocatable output, this function must handle
10175 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
10176 going to be the section symbol corresponding to the output
10177 section, which means that the addend must be adjusted
10178 accordingly. */
10179
10180 static bfd_boolean
10181 ppc64_elf_relocate_section (bfd *output_bfd,
10182 struct bfd_link_info *info,
10183 bfd *input_bfd,
10184 asection *input_section,
10185 bfd_byte *contents,
10186 Elf_Internal_Rela *relocs,
10187 Elf_Internal_Sym *local_syms,
10188 asection **local_sections)
10189 {
10190 struct ppc_link_hash_table *htab;
10191 Elf_Internal_Shdr *symtab_hdr;
10192 struct elf_link_hash_entry **sym_hashes;
10193 Elf_Internal_Rela *rel;
10194 Elf_Internal_Rela *relend;
10195 Elf_Internal_Rela outrel;
10196 bfd_byte *loc;
10197 struct got_entry **local_got_ents;
10198 bfd_vma TOCstart;
10199 bfd_boolean ret = TRUE;
10200 bfd_boolean is_opd;
10201 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
10202 bfd_boolean is_power4 = FALSE;
10203 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
10204
10205 /* Initialize howto table if needed. */
10206 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
10207 ppc_howto_init ();
10208
10209 htab = ppc_hash_table (info);
10210
10211 /* Don't relocate stub sections. */
10212 if (input_section->owner == htab->stub_bfd)
10213 return TRUE;
10214
10215 BFD_ASSERT (is_ppc64_elf (input_bfd));
10216
10217 local_got_ents = elf_local_got_ents (input_bfd);
10218 TOCstart = elf_gp (output_bfd);
10219 symtab_hdr = &elf_symtab_hdr (input_bfd);
10220 sym_hashes = elf_sym_hashes (input_bfd);
10221 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
10222
10223 rel = relocs;
10224 relend = relocs + input_section->reloc_count;
10225 for (; rel < relend; rel++)
10226 {
10227 enum elf_ppc64_reloc_type r_type;
10228 bfd_vma addend, orig_addend;
10229 bfd_reloc_status_type r;
10230 Elf_Internal_Sym *sym;
10231 asection *sec;
10232 struct elf_link_hash_entry *h_elf;
10233 struct ppc_link_hash_entry *h;
10234 struct ppc_link_hash_entry *fdh;
10235 const char *sym_name;
10236 unsigned long r_symndx, toc_symndx;
10237 char tls_mask, tls_gd, tls_type;
10238 char sym_type;
10239 bfd_vma relocation;
10240 bfd_boolean unresolved_reloc;
10241 bfd_boolean warned;
10242 unsigned long insn, mask;
10243 struct ppc_stub_hash_entry *stub_entry;
10244 bfd_vma max_br_offset;
10245 bfd_vma from;
10246
10247 r_type = ELF64_R_TYPE (rel->r_info);
10248 r_symndx = ELF64_R_SYM (rel->r_info);
10249
10250 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10251 symbol of the previous ADDR64 reloc. The symbol gives us the
10252 proper TOC base to use. */
10253 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10254 && rel != relocs
10255 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10256 && is_opd)
10257 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10258
10259 sym = NULL;
10260 sec = NULL;
10261 h_elf = NULL;
10262 sym_name = NULL;
10263 unresolved_reloc = FALSE;
10264 warned = FALSE;
10265 orig_addend = rel->r_addend;
10266
10267 if (r_symndx < symtab_hdr->sh_info)
10268 {
10269 /* It's a local symbol. */
10270 struct _opd_sec_data *opd;
10271
10272 sym = local_syms + r_symndx;
10273 sec = local_sections[r_symndx];
10274 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10275 sym_type = ELF64_ST_TYPE (sym->st_info);
10276 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10277 opd = get_opd_info (sec);
10278 if (opd != NULL && opd->adjust != NULL)
10279 {
10280 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10281 if (adjust == -1)
10282 relocation = 0;
10283 else
10284 {
10285 /* If this is a relocation against the opd section sym
10286 and we have edited .opd, adjust the reloc addend so
10287 that ld -r and ld --emit-relocs output is correct.
10288 If it is a reloc against some other .opd symbol,
10289 then the symbol value will be adjusted later. */
10290 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10291 rel->r_addend += adjust;
10292 else
10293 relocation += adjust;
10294 }
10295 }
10296 }
10297 else
10298 {
10299 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10300 r_symndx, symtab_hdr, sym_hashes,
10301 h_elf, sec, relocation,
10302 unresolved_reloc, warned);
10303 sym_name = h_elf->root.root.string;
10304 sym_type = h_elf->type;
10305 }
10306 h = (struct ppc_link_hash_entry *) h_elf;
10307
10308 if (sec != NULL && elf_discarded_section (sec))
10309 {
10310 /* For relocs against symbols from removed linkonce sections,
10311 or sections discarded by a linker script, we just want the
10312 section contents zeroed. Avoid any special processing. */
10313 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10314 contents + rel->r_offset);
10315 rel->r_info = 0;
10316 rel->r_addend = 0;
10317 continue;
10318 }
10319
10320 if (info->relocatable)
10321 continue;
10322
10323 /* TLS optimizations. Replace instruction sequences and relocs
10324 based on information we collected in tls_optimize. We edit
10325 RELOCS so that --emit-relocs will output something sensible
10326 for the final instruction stream. */
10327 tls_mask = 0;
10328 tls_gd = 0;
10329 toc_symndx = 0;
10330 if (IS_PPC64_TLS_RELOC (r_type))
10331 {
10332 if (h != NULL)
10333 tls_mask = h->tls_mask;
10334 else if (local_got_ents != NULL)
10335 {
10336 char *lgot_masks;
10337 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10338 tls_mask = lgot_masks[r_symndx];
10339 }
10340 if (tls_mask == 0 && r_type == R_PPC64_TLS)
10341 {
10342 /* Check for toc tls entries. */
10343 char *toc_tls;
10344
10345 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10346 rel, input_bfd))
10347 return FALSE;
10348
10349 if (toc_tls)
10350 tls_mask = *toc_tls;
10351 }
10352 }
10353
10354 /* Check that tls relocs are used with tls syms, and non-tls
10355 relocs are used with non-tls syms. */
10356 if (r_symndx != 0
10357 && r_type != R_PPC64_NONE
10358 && (h == NULL
10359 || h->elf.root.type == bfd_link_hash_defined
10360 || h->elf.root.type == bfd_link_hash_defweak)
10361 && (IS_PPC64_TLS_RELOC (r_type)
10362 != (sym_type == STT_TLS
10363 || (sym_type == STT_SECTION
10364 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
10365 {
10366 if (r_type == R_PPC64_TLS && tls_mask != 0)
10367 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10368 ;
10369 else
10370 (*_bfd_error_handler)
10371 (!IS_PPC64_TLS_RELOC (r_type)
10372 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10373 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10374 input_bfd,
10375 input_section,
10376 (long) rel->r_offset,
10377 ppc64_elf_howto_table[r_type]->name,
10378 sym_name);
10379 }
10380
10381 /* Ensure reloc mapping code below stays sane. */
10382 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10383 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10384 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10385 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10386 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10387 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10388 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10389 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10390 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10391 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10392 abort ();
10393
10394 switch (r_type)
10395 {
10396 default:
10397 break;
10398
10399 case R_PPC64_TOC16:
10400 case R_PPC64_TOC16_LO:
10401 case R_PPC64_TOC16_DS:
10402 case R_PPC64_TOC16_LO_DS:
10403 {
10404 /* Check for toc tls entries. */
10405 char *toc_tls;
10406 int retval;
10407
10408 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10409 rel, input_bfd);
10410 if (retval == 0)
10411 return FALSE;
10412
10413 if (toc_tls)
10414 {
10415 tls_mask = *toc_tls;
10416 if (r_type == R_PPC64_TOC16_DS
10417 || r_type == R_PPC64_TOC16_LO_DS)
10418 {
10419 if (tls_mask != 0
10420 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10421 goto toctprel;
10422 }
10423 else
10424 {
10425 /* If we found a GD reloc pair, then we might be
10426 doing a GD->IE transition. */
10427 if (retval == 2)
10428 {
10429 tls_gd = TLS_TPRELGD;
10430 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10431 goto tls_ldgd_opt;
10432 }
10433 else if (retval == 3)
10434 {
10435 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10436 goto tls_ldgd_opt;
10437 }
10438 }
10439 }
10440 }
10441 break;
10442
10443 case R_PPC64_GOT_TPREL16_DS:
10444 case R_PPC64_GOT_TPREL16_LO_DS:
10445 if (tls_mask != 0
10446 && (tls_mask & TLS_TPREL) == 0)
10447 {
10448 toctprel:
10449 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10450 insn &= 31 << 21;
10451 insn |= 0x3c0d0000; /* addis 0,13,0 */
10452 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10453 r_type = R_PPC64_TPREL16_HA;
10454 if (toc_symndx != 0)
10455 {
10456 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10457 /* We changed the symbol. Start over in order to
10458 get h, sym, sec etc. right. */
10459 rel--;
10460 continue;
10461 }
10462 else
10463 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10464 }
10465 break;
10466
10467 case R_PPC64_TLS:
10468 if (tls_mask != 0
10469 && (tls_mask & TLS_TPREL) == 0)
10470 {
10471 bfd_vma rtra;
10472 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10473 if ((insn & ((0x3f << 26) | (31 << 11)))
10474 == ((31 << 26) | (13 << 11)))
10475 rtra = insn & ((1 << 26) - (1 << 16));
10476 else if ((insn & ((0x3f << 26) | (31 << 16)))
10477 == ((31 << 26) | (13 << 16)))
10478 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10479 else
10480 abort ();
10481 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10482 /* add -> addi. */
10483 insn = 14 << 26;
10484 else if ((insn & (31 << 1)) == 23 << 1
10485 && ((insn & (31 << 6)) < 14 << 6
10486 || ((insn & (31 << 6)) >= 16 << 6
10487 && (insn & (31 << 6)) < 24 << 6)))
10488 /* load and store indexed -> dform. */
10489 insn = (32 | ((insn >> 6) & 31)) << 26;
10490 else if ((insn & (31 << 1)) == 21 << 1
10491 && (insn & (0x1a << 6)) == 0)
10492 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10493 insn = (((58 | ((insn >> 6) & 4)) << 26)
10494 | ((insn >> 6) & 1));
10495 else if ((insn & (31 << 1)) == 21 << 1
10496 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10497 /* lwax -> lwa. */
10498 insn = (58 << 26) | 2;
10499 else
10500 abort ();
10501 insn |= rtra;
10502 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10503 /* Was PPC64_TLS which sits on insn boundary, now
10504 PPC64_TPREL16_LO which is at low-order half-word. */
10505 rel->r_offset += d_offset;
10506 r_type = R_PPC64_TPREL16_LO;
10507 if (toc_symndx != 0)
10508 {
10509 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10510 /* We changed the symbol. Start over in order to
10511 get h, sym, sec etc. right. */
10512 rel--;
10513 continue;
10514 }
10515 else
10516 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10517 }
10518 break;
10519
10520 case R_PPC64_GOT_TLSGD16_HI:
10521 case R_PPC64_GOT_TLSGD16_HA:
10522 tls_gd = TLS_TPRELGD;
10523 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10524 goto tls_gdld_hi;
10525 break;
10526
10527 case R_PPC64_GOT_TLSLD16_HI:
10528 case R_PPC64_GOT_TLSLD16_HA:
10529 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10530 {
10531 tls_gdld_hi:
10532 if ((tls_mask & tls_gd) != 0)
10533 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10534 + R_PPC64_GOT_TPREL16_DS);
10535 else
10536 {
10537 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10538 rel->r_offset -= d_offset;
10539 r_type = R_PPC64_NONE;
10540 }
10541 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10542 }
10543 break;
10544
10545 case R_PPC64_GOT_TLSGD16:
10546 case R_PPC64_GOT_TLSGD16_LO:
10547 tls_gd = TLS_TPRELGD;
10548 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10549 goto tls_ldgd_opt;
10550 break;
10551
10552 case R_PPC64_GOT_TLSLD16:
10553 case R_PPC64_GOT_TLSLD16_LO:
10554 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10555 {
10556 bfd_vma insn1, insn2, insn3;
10557 bfd_vma offset;
10558
10559 tls_ldgd_opt:
10560 /* We know that the next reloc is on a tls_get_addr
10561 call, since ppc64_elf_tls_optimize checks this. */
10562 offset = rel[1].r_offset;
10563 insn1 = bfd_get_32 (output_bfd,
10564 contents + rel->r_offset - d_offset);
10565 insn3 = bfd_get_32 (output_bfd,
10566 contents + offset + 4);
10567 if ((tls_mask & tls_gd) != 0)
10568 {
10569 /* IE */
10570 insn1 &= (1 << 26) - (1 << 2);
10571 insn1 |= 58 << 26; /* ld */
10572 insn2 = 0x7c636a14; /* add 3,3,13 */
10573 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10574 R_PPC64_NONE);
10575 if ((tls_mask & TLS_EXPLICIT) == 0)
10576 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10577 + R_PPC64_GOT_TPREL16_DS);
10578 else
10579 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10580 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10581 }
10582 else
10583 {
10584 /* LE */
10585 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10586 insn2 = 0x38630000; /* addi 3,3,0 */
10587 if (tls_gd == 0)
10588 {
10589 /* Was an LD reloc. */
10590 if (toc_symndx)
10591 sec = local_sections[toc_symndx];
10592 for (r_symndx = 0;
10593 r_symndx < symtab_hdr->sh_info;
10594 r_symndx++)
10595 if (local_sections[r_symndx] == sec)
10596 break;
10597 if (r_symndx >= symtab_hdr->sh_info)
10598 r_symndx = 0;
10599 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10600 if (r_symndx != 0)
10601 rel->r_addend -= (local_syms[r_symndx].st_value
10602 + sec->output_offset
10603 + sec->output_section->vma);
10604 rel[1].r_addend = rel->r_addend;
10605 }
10606 else if (toc_symndx != 0)
10607 r_symndx = toc_symndx;
10608 r_type = R_PPC64_TPREL16_HA;
10609 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10610 rel[1].r_info = ELF64_R_INFO (r_symndx,
10611 R_PPC64_TPREL16_LO);
10612 rel[1].r_offset += d_offset;
10613 }
10614 if (insn3 == NOP
10615 || insn3 == CROR_151515 || insn3 == CROR_313131)
10616 {
10617 insn3 = insn2;
10618 insn2 = NOP;
10619 rel[1].r_offset += 4;
10620 }
10621 bfd_put_32 (output_bfd, insn1,
10622 contents + rel->r_offset - d_offset);
10623 bfd_put_32 (output_bfd, insn2, contents + offset);
10624 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10625 if (tls_gd == 0 || toc_symndx != 0)
10626 {
10627 /* We changed the symbol. Start over in order
10628 to get h, sym, sec etc. right. */
10629 rel--;
10630 continue;
10631 }
10632 }
10633 break;
10634
10635 case R_PPC64_DTPMOD64:
10636 if (rel + 1 < relend
10637 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10638 && rel[1].r_offset == rel->r_offset + 8)
10639 {
10640 if ((tls_mask & TLS_GD) == 0)
10641 {
10642 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10643 if ((tls_mask & TLS_TPRELGD) != 0)
10644 r_type = R_PPC64_TPREL64;
10645 else
10646 {
10647 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10648 r_type = R_PPC64_NONE;
10649 }
10650 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10651 }
10652 }
10653 else
10654 {
10655 if ((tls_mask & TLS_LD) == 0)
10656 {
10657 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10658 r_type = R_PPC64_NONE;
10659 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10660 }
10661 }
10662 break;
10663
10664 case R_PPC64_TPREL64:
10665 if ((tls_mask & TLS_TPREL) == 0)
10666 {
10667 r_type = R_PPC64_NONE;
10668 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10669 }
10670 break;
10671 }
10672
10673 /* Handle other relocations that tweak non-addend part of insn. */
10674 insn = 0;
10675 max_br_offset = 1 << 25;
10676 addend = rel->r_addend;
10677 switch (r_type)
10678 {
10679 default:
10680 break;
10681
10682 /* Branch taken prediction relocations. */
10683 case R_PPC64_ADDR14_BRTAKEN:
10684 case R_PPC64_REL14_BRTAKEN:
10685 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10686 /* Fall thru. */
10687
10688 /* Branch not taken prediction relocations. */
10689 case R_PPC64_ADDR14_BRNTAKEN:
10690 case R_PPC64_REL14_BRNTAKEN:
10691 insn |= bfd_get_32 (output_bfd,
10692 contents + rel->r_offset) & ~(0x01 << 21);
10693 /* Fall thru. */
10694
10695 case R_PPC64_REL14:
10696 max_br_offset = 1 << 15;
10697 /* Fall thru. */
10698
10699 case R_PPC64_REL24:
10700 /* Calls to functions with a different TOC, such as calls to
10701 shared objects, need to alter the TOC pointer. This is
10702 done using a linkage stub. A REL24 branching to these
10703 linkage stubs needs to be followed by a nop, as the nop
10704 will be replaced with an instruction to restore the TOC
10705 base pointer. */
10706 stub_entry = NULL;
10707 fdh = h;
10708 if (((h != NULL
10709 && (((fdh = h->oh) != NULL
10710 && fdh->elf.plt.plist != NULL)
10711 || (fdh = h)->elf.plt.plist != NULL))
10712 || (sec != NULL
10713 && sec->output_section != NULL
10714 && sec->id <= htab->top_id
10715 && (htab->stub_group[sec->id].toc_off
10716 != htab->stub_group[input_section->id].toc_off)))
10717 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10718 rel, htab)) != NULL
10719 && (stub_entry->stub_type == ppc_stub_plt_call
10720 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10721 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10722 {
10723 bfd_boolean can_plt_call = FALSE;
10724
10725 if (rel->r_offset + 8 <= input_section->size)
10726 {
10727 unsigned long nop;
10728 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10729 if (nop == NOP
10730 || nop == CROR_151515 || nop == CROR_313131)
10731 {
10732 bfd_put_32 (input_bfd, LD_R2_40R1,
10733 contents + rel->r_offset + 4);
10734 can_plt_call = TRUE;
10735 }
10736 }
10737
10738 if (!can_plt_call)
10739 {
10740 if (stub_entry->stub_type == ppc_stub_plt_call)
10741 {
10742 /* If this is a plain branch rather than a branch
10743 and link, don't require a nop. However, don't
10744 allow tail calls in a shared library as they
10745 will result in r2 being corrupted. */
10746 unsigned long br;
10747 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10748 if (info->executable && (br & 1) == 0)
10749 can_plt_call = TRUE;
10750 else
10751 stub_entry = NULL;
10752 }
10753 else if (h != NULL
10754 && strcmp (h->elf.root.root.string,
10755 ".__libc_start_main") == 0)
10756 {
10757 /* Allow crt1 branch to go via a toc adjusting stub. */
10758 can_plt_call = TRUE;
10759 }
10760 else
10761 {
10762 if (strcmp (input_section->output_section->name,
10763 ".init") == 0
10764 || strcmp (input_section->output_section->name,
10765 ".fini") == 0)
10766 (*_bfd_error_handler)
10767 (_("%B(%A+0x%lx): automatic multiple TOCs "
10768 "not supported using your crt files; "
10769 "recompile with -mminimal-toc or upgrade gcc"),
10770 input_bfd,
10771 input_section,
10772 (long) rel->r_offset);
10773 else
10774 (*_bfd_error_handler)
10775 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10776 "does not allow automatic multiple TOCs; "
10777 "recompile with -mminimal-toc or "
10778 "-fno-optimize-sibling-calls, "
10779 "or make `%s' extern"),
10780 input_bfd,
10781 input_section,
10782 (long) rel->r_offset,
10783 sym_name,
10784 sym_name);
10785 bfd_set_error (bfd_error_bad_value);
10786 ret = FALSE;
10787 }
10788 }
10789
10790 if (can_plt_call
10791 && stub_entry->stub_type == ppc_stub_plt_call)
10792 unresolved_reloc = FALSE;
10793 }
10794
10795 if (stub_entry == NULL
10796 && get_opd_info (sec) != NULL)
10797 {
10798 /* The branch destination is the value of the opd entry. */
10799 bfd_vma off = (relocation + addend
10800 - sec->output_section->vma
10801 - sec->output_offset);
10802 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10803 if (dest != (bfd_vma) -1)
10804 {
10805 relocation = dest;
10806 addend = 0;
10807 }
10808 }
10809
10810 /* If the branch is out of reach we ought to have a long
10811 branch stub. */
10812 from = (rel->r_offset
10813 + input_section->output_offset
10814 + input_section->output_section->vma);
10815
10816 if (stub_entry == NULL
10817 && (relocation + addend - from + max_br_offset
10818 >= 2 * max_br_offset)
10819 && r_type != R_PPC64_ADDR14_BRTAKEN
10820 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10821 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10822 htab);
10823
10824 if (stub_entry != NULL)
10825 {
10826 /* Munge up the value and addend so that we call the stub
10827 rather than the procedure directly. */
10828 relocation = (stub_entry->stub_offset
10829 + stub_entry->stub_sec->output_offset
10830 + stub_entry->stub_sec->output_section->vma);
10831 addend = 0;
10832 }
10833
10834 if (insn != 0)
10835 {
10836 if (is_power4)
10837 {
10838 /* Set 'a' bit. This is 0b00010 in BO field for branch
10839 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10840 for branch on CTR insns (BO == 1a00t or 1a01t). */
10841 if ((insn & (0x14 << 21)) == (0x04 << 21))
10842 insn |= 0x02 << 21;
10843 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10844 insn |= 0x08 << 21;
10845 else
10846 break;
10847 }
10848 else
10849 {
10850 /* Invert 'y' bit if not the default. */
10851 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10852 insn ^= 0x01 << 21;
10853 }
10854
10855 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10856 }
10857
10858 /* NOP out calls to undefined weak functions.
10859 We can thus call a weak function without first
10860 checking whether the function is defined. */
10861 else if (h != NULL
10862 && h->elf.root.type == bfd_link_hash_undefweak
10863 && r_type == R_PPC64_REL24
10864 && relocation == 0
10865 && addend == 0)
10866 {
10867 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10868 continue;
10869 }
10870 break;
10871 }
10872
10873 /* Set `addend'. */
10874 tls_type = 0;
10875 switch (r_type)
10876 {
10877 default:
10878 (*_bfd_error_handler)
10879 (_("%B: unknown relocation type %d for symbol %s"),
10880 input_bfd, (int) r_type, sym_name);
10881
10882 bfd_set_error (bfd_error_bad_value);
10883 ret = FALSE;
10884 continue;
10885
10886 case R_PPC64_NONE:
10887 case R_PPC64_TLS:
10888 case R_PPC64_GNU_VTINHERIT:
10889 case R_PPC64_GNU_VTENTRY:
10890 continue;
10891
10892 /* GOT16 relocations. Like an ADDR16 using the symbol's
10893 address in the GOT as relocation value instead of the
10894 symbol's value itself. Also, create a GOT entry for the
10895 symbol and put the symbol value there. */
10896 case R_PPC64_GOT_TLSGD16:
10897 case R_PPC64_GOT_TLSGD16_LO:
10898 case R_PPC64_GOT_TLSGD16_HI:
10899 case R_PPC64_GOT_TLSGD16_HA:
10900 tls_type = TLS_TLS | TLS_GD;
10901 goto dogot;
10902
10903 case R_PPC64_GOT_TLSLD16:
10904 case R_PPC64_GOT_TLSLD16_LO:
10905 case R_PPC64_GOT_TLSLD16_HI:
10906 case R_PPC64_GOT_TLSLD16_HA:
10907 tls_type = TLS_TLS | TLS_LD;
10908 goto dogot;
10909
10910 case R_PPC64_GOT_TPREL16_DS:
10911 case R_PPC64_GOT_TPREL16_LO_DS:
10912 case R_PPC64_GOT_TPREL16_HI:
10913 case R_PPC64_GOT_TPREL16_HA:
10914 tls_type = TLS_TLS | TLS_TPREL;
10915 goto dogot;
10916
10917 case R_PPC64_GOT_DTPREL16_DS:
10918 case R_PPC64_GOT_DTPREL16_LO_DS:
10919 case R_PPC64_GOT_DTPREL16_HI:
10920 case R_PPC64_GOT_DTPREL16_HA:
10921 tls_type = TLS_TLS | TLS_DTPREL;
10922 goto dogot;
10923
10924 case R_PPC64_GOT16:
10925 case R_PPC64_GOT16_LO:
10926 case R_PPC64_GOT16_HI:
10927 case R_PPC64_GOT16_HA:
10928 case R_PPC64_GOT16_DS:
10929 case R_PPC64_GOT16_LO_DS:
10930 dogot:
10931 {
10932 /* Relocation is to the entry for this symbol in the global
10933 offset table. */
10934 asection *got;
10935 bfd_vma *offp;
10936 bfd_vma off;
10937 unsigned long indx = 0;
10938
10939 if (tls_type == (TLS_TLS | TLS_LD)
10940 && (h == NULL
10941 || !h->elf.def_dynamic))
10942 offp = &ppc64_tlsld_got (input_bfd)->offset;
10943 else
10944 {
10945 struct got_entry *ent;
10946
10947 if (h != NULL)
10948 {
10949 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10950 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10951 &h->elf)
10952 || (info->shared
10953 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10954 /* This is actually a static link, or it is a
10955 -Bsymbolic link and the symbol is defined
10956 locally, or the symbol was forced to be local
10957 because of a version file. */
10958 ;
10959 else
10960 {
10961 indx = h->elf.dynindx;
10962 unresolved_reloc = FALSE;
10963 }
10964 ent = h->elf.got.glist;
10965 }
10966 else
10967 {
10968 if (local_got_ents == NULL)
10969 abort ();
10970 ent = local_got_ents[r_symndx];
10971 }
10972
10973 for (; ent != NULL; ent = ent->next)
10974 if (ent->addend == orig_addend
10975 && ent->owner == input_bfd
10976 && ent->tls_type == tls_type)
10977 break;
10978 if (ent == NULL)
10979 abort ();
10980 offp = &ent->got.offset;
10981 }
10982
10983 got = ppc64_elf_tdata (input_bfd)->got;
10984 if (got == NULL)
10985 abort ();
10986
10987 /* The offset must always be a multiple of 8. We use the
10988 least significant bit to record whether we have already
10989 processed this entry. */
10990 off = *offp;
10991 if ((off & 1) != 0)
10992 off &= ~1;
10993 else
10994 {
10995 /* Generate relocs for the dynamic linker, except in
10996 the case of TLSLD where we'll use one entry per
10997 module. */
10998 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10999
11000 *offp = off | 1;
11001 if ((info->shared || indx != 0)
11002 && (h == NULL
11003 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11004 || h->elf.root.type != bfd_link_hash_undefweak))
11005 {
11006 outrel.r_offset = (got->output_section->vma
11007 + got->output_offset
11008 + off);
11009 outrel.r_addend = addend;
11010 if (tls_type & (TLS_LD | TLS_GD))
11011 {
11012 outrel.r_addend = 0;
11013 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
11014 if (tls_type == (TLS_TLS | TLS_GD))
11015 {
11016 loc = relgot->contents;
11017 loc += (relgot->reloc_count++
11018 * sizeof (Elf64_External_Rela));
11019 bfd_elf64_swap_reloca_out (output_bfd,
11020 &outrel, loc);
11021 outrel.r_offset += 8;
11022 outrel.r_addend = addend;
11023 outrel.r_info
11024 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11025 }
11026 }
11027 else if (tls_type == (TLS_TLS | TLS_DTPREL))
11028 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11029 else if (tls_type == (TLS_TLS | TLS_TPREL))
11030 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
11031 else if (indx == 0)
11032 {
11033 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
11034
11035 /* Write the .got section contents for the sake
11036 of prelink. */
11037 loc = got->contents + off;
11038 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
11039 loc);
11040 }
11041 else
11042 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
11043
11044 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
11045 {
11046 outrel.r_addend += relocation;
11047 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
11048 outrel.r_addend -= htab->elf.tls_sec->vma;
11049 }
11050 loc = relgot->contents;
11051 loc += (relgot->reloc_count++
11052 * sizeof (Elf64_External_Rela));
11053 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11054 }
11055
11056 /* Init the .got section contents here if we're not
11057 emitting a reloc. */
11058 else
11059 {
11060 relocation += addend;
11061 if (tls_type == (TLS_TLS | TLS_LD))
11062 relocation = 1;
11063 else if (tls_type != 0)
11064 {
11065 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
11066 if (tls_type == (TLS_TLS | TLS_TPREL))
11067 relocation += DTP_OFFSET - TP_OFFSET;
11068
11069 if (tls_type == (TLS_TLS | TLS_GD))
11070 {
11071 bfd_put_64 (output_bfd, relocation,
11072 got->contents + off + 8);
11073 relocation = 1;
11074 }
11075 }
11076
11077 bfd_put_64 (output_bfd, relocation,
11078 got->contents + off);
11079 }
11080 }
11081
11082 if (off >= (bfd_vma) -2)
11083 abort ();
11084
11085 relocation = got->output_offset + off;
11086
11087 /* TOC base (r2) is TOC start plus 0x8000. */
11088 addend = -TOC_BASE_OFF;
11089 }
11090 break;
11091
11092 case R_PPC64_PLT16_HA:
11093 case R_PPC64_PLT16_HI:
11094 case R_PPC64_PLT16_LO:
11095 case R_PPC64_PLT32:
11096 case R_PPC64_PLT64:
11097 /* Relocation is to the entry for this symbol in the
11098 procedure linkage table. */
11099
11100 /* Resolve a PLT reloc against a local symbol directly,
11101 without using the procedure linkage table. */
11102 if (h == NULL)
11103 break;
11104
11105 /* It's possible that we didn't make a PLT entry for this
11106 symbol. This happens when statically linking PIC code,
11107 or when using -Bsymbolic. Go find a match if there is a
11108 PLT entry. */
11109 if (htab->plt != NULL)
11110 {
11111 struct plt_entry *ent;
11112 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
11113 if (ent->addend == orig_addend
11114 && ent->plt.offset != (bfd_vma) -1)
11115 {
11116 relocation = (htab->plt->output_section->vma
11117 + htab->plt->output_offset
11118 + ent->plt.offset);
11119 unresolved_reloc = FALSE;
11120 }
11121 }
11122 break;
11123
11124 case R_PPC64_TOC:
11125 /* Relocation value is TOC base. */
11126 relocation = TOCstart;
11127 if (r_symndx == 0)
11128 relocation += htab->stub_group[input_section->id].toc_off;
11129 else if (unresolved_reloc)
11130 ;
11131 else if (sec != NULL && sec->id <= htab->top_id)
11132 relocation += htab->stub_group[sec->id].toc_off;
11133 else
11134 unresolved_reloc = TRUE;
11135 goto dodyn;
11136
11137 /* TOC16 relocs. We want the offset relative to the TOC base,
11138 which is the address of the start of the TOC plus 0x8000.
11139 The TOC consists of sections .got, .toc, .tocbss, and .plt,
11140 in this order. */
11141 case R_PPC64_TOC16:
11142 case R_PPC64_TOC16_LO:
11143 case R_PPC64_TOC16_HI:
11144 case R_PPC64_TOC16_DS:
11145 case R_PPC64_TOC16_LO_DS:
11146 case R_PPC64_TOC16_HA:
11147 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
11148 break;
11149
11150 /* Relocate against the beginning of the section. */
11151 case R_PPC64_SECTOFF:
11152 case R_PPC64_SECTOFF_LO:
11153 case R_PPC64_SECTOFF_HI:
11154 case R_PPC64_SECTOFF_DS:
11155 case R_PPC64_SECTOFF_LO_DS:
11156 case R_PPC64_SECTOFF_HA:
11157 if (sec != NULL)
11158 addend -= sec->output_section->vma;
11159 break;
11160
11161 case R_PPC64_REL14:
11162 case R_PPC64_REL14_BRNTAKEN:
11163 case R_PPC64_REL14_BRTAKEN:
11164 case R_PPC64_REL24:
11165 break;
11166
11167 case R_PPC64_TPREL16:
11168 case R_PPC64_TPREL16_LO:
11169 case R_PPC64_TPREL16_HI:
11170 case R_PPC64_TPREL16_HA:
11171 case R_PPC64_TPREL16_DS:
11172 case R_PPC64_TPREL16_LO_DS:
11173 case R_PPC64_TPREL16_HIGHER:
11174 case R_PPC64_TPREL16_HIGHERA:
11175 case R_PPC64_TPREL16_HIGHEST:
11176 case R_PPC64_TPREL16_HIGHESTA:
11177 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11178 if (info->shared)
11179 /* The TPREL16 relocs shouldn't really be used in shared
11180 libs as they will result in DT_TEXTREL being set, but
11181 support them anyway. */
11182 goto dodyn;
11183 break;
11184
11185 case R_PPC64_DTPREL16:
11186 case R_PPC64_DTPREL16_LO:
11187 case R_PPC64_DTPREL16_HI:
11188 case R_PPC64_DTPREL16_HA:
11189 case R_PPC64_DTPREL16_DS:
11190 case R_PPC64_DTPREL16_LO_DS:
11191 case R_PPC64_DTPREL16_HIGHER:
11192 case R_PPC64_DTPREL16_HIGHERA:
11193 case R_PPC64_DTPREL16_HIGHEST:
11194 case R_PPC64_DTPREL16_HIGHESTA:
11195 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11196 break;
11197
11198 case R_PPC64_DTPMOD64:
11199 relocation = 1;
11200 addend = 0;
11201 goto dodyn;
11202
11203 case R_PPC64_TPREL64:
11204 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11205 goto dodyn;
11206
11207 case R_PPC64_DTPREL64:
11208 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11209 /* Fall thru */
11210
11211 /* Relocations that may need to be propagated if this is a
11212 dynamic object. */
11213 case R_PPC64_REL30:
11214 case R_PPC64_REL32:
11215 case R_PPC64_REL64:
11216 case R_PPC64_ADDR14:
11217 case R_PPC64_ADDR14_BRNTAKEN:
11218 case R_PPC64_ADDR14_BRTAKEN:
11219 case R_PPC64_ADDR16:
11220 case R_PPC64_ADDR16_DS:
11221 case R_PPC64_ADDR16_HA:
11222 case R_PPC64_ADDR16_HI:
11223 case R_PPC64_ADDR16_HIGHER:
11224 case R_PPC64_ADDR16_HIGHERA:
11225 case R_PPC64_ADDR16_HIGHEST:
11226 case R_PPC64_ADDR16_HIGHESTA:
11227 case R_PPC64_ADDR16_LO:
11228 case R_PPC64_ADDR16_LO_DS:
11229 case R_PPC64_ADDR24:
11230 case R_PPC64_ADDR32:
11231 case R_PPC64_ADDR64:
11232 case R_PPC64_UADDR16:
11233 case R_PPC64_UADDR32:
11234 case R_PPC64_UADDR64:
11235 dodyn:
11236 if ((input_section->flags & SEC_ALLOC) == 0)
11237 break;
11238
11239 if (NO_OPD_RELOCS && is_opd)
11240 break;
11241
11242 if ((info->shared
11243 && (h == NULL
11244 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11245 || h->elf.root.type != bfd_link_hash_undefweak)
11246 && (must_be_dyn_reloc (info, r_type)
11247 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
11248 || (ELIMINATE_COPY_RELOCS
11249 && !info->shared
11250 && h != NULL
11251 && h->elf.dynindx != -1
11252 && !h->elf.non_got_ref
11253 && h->elf.def_dynamic
11254 && !h->elf.def_regular))
11255 {
11256 Elf_Internal_Rela outrel;
11257 bfd_boolean skip, relocate;
11258 asection *sreloc;
11259 bfd_byte *loc;
11260 bfd_vma out_off;
11261
11262 /* When generating a dynamic object, these relocations
11263 are copied into the output file to be resolved at run
11264 time. */
11265
11266 skip = FALSE;
11267 relocate = FALSE;
11268
11269 out_off = _bfd_elf_section_offset (output_bfd, info,
11270 input_section, rel->r_offset);
11271 if (out_off == (bfd_vma) -1)
11272 skip = TRUE;
11273 else if (out_off == (bfd_vma) -2)
11274 skip = TRUE, relocate = TRUE;
11275 out_off += (input_section->output_section->vma
11276 + input_section->output_offset);
11277 outrel.r_offset = out_off;
11278 outrel.r_addend = rel->r_addend;
11279
11280 /* Optimize unaligned reloc use. */
11281 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11282 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11283 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11284 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11285 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11286 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11287 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11288 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11289 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11290
11291 if (skip)
11292 memset (&outrel, 0, sizeof outrel);
11293 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11294 && !is_opd
11295 && r_type != R_PPC64_TOC)
11296 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11297 else
11298 {
11299 /* This symbol is local, or marked to become local,
11300 or this is an opd section reloc which must point
11301 at a local function. */
11302 outrel.r_addend += relocation;
11303 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11304 {
11305 if (is_opd && h != NULL)
11306 {
11307 /* Lie about opd entries. This case occurs
11308 when building shared libraries and we
11309 reference a function in another shared
11310 lib. The same thing happens for a weak
11311 definition in an application that's
11312 overridden by a strong definition in a
11313 shared lib. (I believe this is a generic
11314 bug in binutils handling of weak syms.)
11315 In these cases we won't use the opd
11316 entry in this lib. */
11317 unresolved_reloc = FALSE;
11318 }
11319 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11320
11321 /* We need to relocate .opd contents for ld.so.
11322 Prelink also wants simple and consistent rules
11323 for relocs. This make all RELATIVE relocs have
11324 *r_offset equal to r_addend. */
11325 relocate = TRUE;
11326 }
11327 else
11328 {
11329 long indx = 0;
11330
11331 if (r_symndx == 0 || bfd_is_abs_section (sec))
11332 ;
11333 else if (sec == NULL || sec->owner == NULL)
11334 {
11335 bfd_set_error (bfd_error_bad_value);
11336 return FALSE;
11337 }
11338 else
11339 {
11340 asection *osec;
11341
11342 osec = sec->output_section;
11343 indx = elf_section_data (osec)->dynindx;
11344
11345 if (indx == 0)
11346 {
11347 if ((osec->flags & SEC_READONLY) == 0
11348 && htab->elf.data_index_section != NULL)
11349 osec = htab->elf.data_index_section;
11350 else
11351 osec = htab->elf.text_index_section;
11352 indx = elf_section_data (osec)->dynindx;
11353 }
11354 BFD_ASSERT (indx != 0);
11355
11356 /* We are turning this relocation into one
11357 against a section symbol, so subtract out
11358 the output section's address but not the
11359 offset of the input section in the output
11360 section. */
11361 outrel.r_addend -= osec->vma;
11362 }
11363
11364 outrel.r_info = ELF64_R_INFO (indx, r_type);
11365 }
11366 }
11367
11368 sreloc = elf_section_data (input_section)->sreloc;
11369 if (sreloc == NULL)
11370 abort ();
11371
11372 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11373 >= sreloc->size)
11374 abort ();
11375 loc = sreloc->contents;
11376 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11377 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11378
11379 /* If this reloc is against an external symbol, it will
11380 be computed at runtime, so there's no need to do
11381 anything now. However, for the sake of prelink ensure
11382 that the section contents are a known value. */
11383 if (! relocate)
11384 {
11385 unresolved_reloc = FALSE;
11386 /* The value chosen here is quite arbitrary as ld.so
11387 ignores section contents except for the special
11388 case of .opd where the contents might be accessed
11389 before relocation. Choose zero, as that won't
11390 cause reloc overflow. */
11391 relocation = 0;
11392 addend = 0;
11393 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11394 to improve backward compatibility with older
11395 versions of ld. */
11396 if (r_type == R_PPC64_ADDR64)
11397 addend = outrel.r_addend;
11398 /* Adjust pc_relative relocs to have zero in *r_offset. */
11399 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11400 addend = (input_section->output_section->vma
11401 + input_section->output_offset
11402 + rel->r_offset);
11403 }
11404 }
11405 break;
11406
11407 case R_PPC64_COPY:
11408 case R_PPC64_GLOB_DAT:
11409 case R_PPC64_JMP_SLOT:
11410 case R_PPC64_RELATIVE:
11411 /* We shouldn't ever see these dynamic relocs in relocatable
11412 files. */
11413 /* Fall through. */
11414
11415 case R_PPC64_PLTGOT16:
11416 case R_PPC64_PLTGOT16_DS:
11417 case R_PPC64_PLTGOT16_HA:
11418 case R_PPC64_PLTGOT16_HI:
11419 case R_PPC64_PLTGOT16_LO:
11420 case R_PPC64_PLTGOT16_LO_DS:
11421 case R_PPC64_PLTREL32:
11422 case R_PPC64_PLTREL64:
11423 /* These ones haven't been implemented yet. */
11424
11425 (*_bfd_error_handler)
11426 (_("%B: relocation %s is not supported for symbol %s."),
11427 input_bfd,
11428 ppc64_elf_howto_table[r_type]->name, sym_name);
11429
11430 bfd_set_error (bfd_error_invalid_operation);
11431 ret = FALSE;
11432 continue;
11433 }
11434
11435 /* Do any further special processing. */
11436 switch (r_type)
11437 {
11438 default:
11439 break;
11440
11441 case R_PPC64_ADDR16_HA:
11442 case R_PPC64_ADDR16_HIGHERA:
11443 case R_PPC64_ADDR16_HIGHESTA:
11444 case R_PPC64_TOC16_HA:
11445 case R_PPC64_SECTOFF_HA:
11446 case R_PPC64_TPREL16_HA:
11447 case R_PPC64_DTPREL16_HA:
11448 case R_PPC64_TPREL16_HIGHER:
11449 case R_PPC64_TPREL16_HIGHERA:
11450 case R_PPC64_TPREL16_HIGHEST:
11451 case R_PPC64_TPREL16_HIGHESTA:
11452 case R_PPC64_DTPREL16_HIGHER:
11453 case R_PPC64_DTPREL16_HIGHERA:
11454 case R_PPC64_DTPREL16_HIGHEST:
11455 case R_PPC64_DTPREL16_HIGHESTA:
11456 /* It's just possible that this symbol is a weak symbol
11457 that's not actually defined anywhere. In that case,
11458 'sec' would be NULL, and we should leave the symbol
11459 alone (it will be set to zero elsewhere in the link). */
11460 if (sec == NULL)
11461 break;
11462 /* Fall thru */
11463
11464 case R_PPC64_GOT16_HA:
11465 case R_PPC64_PLTGOT16_HA:
11466 case R_PPC64_PLT16_HA:
11467 case R_PPC64_GOT_TLSGD16_HA:
11468 case R_PPC64_GOT_TLSLD16_HA:
11469 case R_PPC64_GOT_TPREL16_HA:
11470 case R_PPC64_GOT_DTPREL16_HA:
11471 /* Add 0x10000 if sign bit in 0:15 is set.
11472 Bits 0:15 are not used. */
11473 addend += 0x8000;
11474 break;
11475
11476 case R_PPC64_ADDR16_DS:
11477 case R_PPC64_ADDR16_LO_DS:
11478 case R_PPC64_GOT16_DS:
11479 case R_PPC64_GOT16_LO_DS:
11480 case R_PPC64_PLT16_LO_DS:
11481 case R_PPC64_SECTOFF_DS:
11482 case R_PPC64_SECTOFF_LO_DS:
11483 case R_PPC64_TOC16_DS:
11484 case R_PPC64_TOC16_LO_DS:
11485 case R_PPC64_PLTGOT16_DS:
11486 case R_PPC64_PLTGOT16_LO_DS:
11487 case R_PPC64_GOT_TPREL16_DS:
11488 case R_PPC64_GOT_TPREL16_LO_DS:
11489 case R_PPC64_GOT_DTPREL16_DS:
11490 case R_PPC64_GOT_DTPREL16_LO_DS:
11491 case R_PPC64_TPREL16_DS:
11492 case R_PPC64_TPREL16_LO_DS:
11493 case R_PPC64_DTPREL16_DS:
11494 case R_PPC64_DTPREL16_LO_DS:
11495 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11496 mask = 3;
11497 /* If this reloc is against an lq insn, then the value must be
11498 a multiple of 16. This is somewhat of a hack, but the
11499 "correct" way to do this by defining _DQ forms of all the
11500 _DS relocs bloats all reloc switches in this file. It
11501 doesn't seem to make much sense to use any of these relocs
11502 in data, so testing the insn should be safe. */
11503 if ((insn & (0x3f << 26)) == (56u << 26))
11504 mask = 15;
11505 if (((relocation + addend) & mask) != 0)
11506 {
11507 (*_bfd_error_handler)
11508 (_("%B: error: relocation %s not a multiple of %d"),
11509 input_bfd,
11510 ppc64_elf_howto_table[r_type]->name,
11511 mask + 1);
11512 bfd_set_error (bfd_error_bad_value);
11513 ret = FALSE;
11514 continue;
11515 }
11516 break;
11517 }
11518
11519 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11520 because such sections are not SEC_ALLOC and thus ld.so will
11521 not process them. */
11522 if (unresolved_reloc
11523 && !((input_section->flags & SEC_DEBUGGING) != 0
11524 && h->elf.def_dynamic))
11525 {
11526 (*_bfd_error_handler)
11527 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11528 input_bfd,
11529 input_section,
11530 (long) rel->r_offset,
11531 ppc64_elf_howto_table[(int) r_type]->name,
11532 h->elf.root.root.string);
11533 ret = FALSE;
11534 }
11535
11536 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11537 input_bfd,
11538 input_section,
11539 contents,
11540 rel->r_offset,
11541 relocation,
11542 addend);
11543
11544 if (r != bfd_reloc_ok)
11545 {
11546 if (sym_name == NULL)
11547 sym_name = "(null)";
11548 if (r == bfd_reloc_overflow)
11549 {
11550 if (warned)
11551 continue;
11552 if (h != NULL
11553 && h->elf.root.type == bfd_link_hash_undefweak
11554 && ppc64_elf_howto_table[r_type]->pc_relative)
11555 {
11556 /* Assume this is a call protected by other code that
11557 detects the symbol is undefined. If this is the case,
11558 we can safely ignore the overflow. If not, the
11559 program is hosed anyway, and a little warning isn't
11560 going to help. */
11561
11562 continue;
11563 }
11564
11565 if (!((*info->callbacks->reloc_overflow)
11566 (info, (h ? &h->elf.root : NULL), sym_name,
11567 ppc64_elf_howto_table[r_type]->name,
11568 orig_addend, input_bfd, input_section, rel->r_offset)))
11569 return FALSE;
11570 }
11571 else
11572 {
11573 (*_bfd_error_handler)
11574 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11575 input_bfd,
11576 input_section,
11577 (long) rel->r_offset,
11578 ppc64_elf_howto_table[r_type]->name,
11579 sym_name,
11580 (int) r);
11581 ret = FALSE;
11582 }
11583 }
11584 }
11585
11586 /* If we're emitting relocations, then shortly after this function
11587 returns, reloc offsets and addends for this section will be
11588 adjusted. Worse, reloc symbol indices will be for the output
11589 file rather than the input. Save a copy of the relocs for
11590 opd_entry_value. */
11591 if (is_opd && (info->emitrelocations || info->relocatable))
11592 {
11593 bfd_size_type amt;
11594 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11595 rel = bfd_alloc (input_bfd, amt);
11596 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11597 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11598 if (rel == NULL)
11599 return FALSE;
11600 memcpy (rel, relocs, amt);
11601 }
11602 return ret;
11603 }
11604
11605 /* Adjust the value of any local symbols in opd sections. */
11606
11607 static bfd_boolean
11608 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11609 const char *name ATTRIBUTE_UNUSED,
11610 Elf_Internal_Sym *elfsym,
11611 asection *input_sec,
11612 struct elf_link_hash_entry *h)
11613 {
11614 struct _opd_sec_data *opd;
11615 long adjust;
11616 bfd_vma value;
11617
11618 if (h != NULL)
11619 return TRUE;
11620
11621 opd = get_opd_info (input_sec);
11622 if (opd == NULL || opd->adjust == NULL)
11623 return TRUE;
11624
11625 value = elfsym->st_value - input_sec->output_offset;
11626 if (!info->relocatable)
11627 value -= input_sec->output_section->vma;
11628
11629 adjust = opd->adjust[value / 8];
11630 if (adjust == -1)
11631 elfsym->st_value = 0;
11632 else
11633 elfsym->st_value += adjust;
11634 return TRUE;
11635 }
11636
11637 /* Finish up dynamic symbol handling. We set the contents of various
11638 dynamic sections here. */
11639
11640 static bfd_boolean
11641 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11642 struct bfd_link_info *info,
11643 struct elf_link_hash_entry *h,
11644 Elf_Internal_Sym *sym)
11645 {
11646 struct ppc_link_hash_table *htab;
11647 struct plt_entry *ent;
11648 Elf_Internal_Rela rela;
11649 bfd_byte *loc;
11650
11651 htab = ppc_hash_table (info);
11652
11653 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11654 if (ent->plt.offset != (bfd_vma) -1)
11655 {
11656 /* This symbol has an entry in the procedure linkage
11657 table. Set it up. */
11658
11659 if (htab->plt == NULL
11660 || htab->relplt == NULL
11661 || htab->glink == NULL)
11662 abort ();
11663
11664 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11665 fill in the PLT entry. */
11666 rela.r_offset = (htab->plt->output_section->vma
11667 + htab->plt->output_offset
11668 + ent->plt.offset);
11669 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11670 rela.r_addend = ent->addend;
11671
11672 loc = htab->relplt->contents;
11673 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11674 * sizeof (Elf64_External_Rela));
11675 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11676 }
11677
11678 if (h->needs_copy)
11679 {
11680 Elf_Internal_Rela rela;
11681 bfd_byte *loc;
11682
11683 /* This symbol needs a copy reloc. Set it up. */
11684
11685 if (h->dynindx == -1
11686 || (h->root.type != bfd_link_hash_defined
11687 && h->root.type != bfd_link_hash_defweak)
11688 || htab->relbss == NULL)
11689 abort ();
11690
11691 rela.r_offset = (h->root.u.def.value
11692 + h->root.u.def.section->output_section->vma
11693 + h->root.u.def.section->output_offset);
11694 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11695 rela.r_addend = 0;
11696 loc = htab->relbss->contents;
11697 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11698 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11699 }
11700
11701 /* Mark some specially defined symbols as absolute. */
11702 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11703 sym->st_shndx = SHN_ABS;
11704
11705 return TRUE;
11706 }
11707
11708 /* Used to decide how to sort relocs in an optimal manner for the
11709 dynamic linker, before writing them out. */
11710
11711 static enum elf_reloc_type_class
11712 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11713 {
11714 enum elf_ppc64_reloc_type r_type;
11715
11716 r_type = ELF64_R_TYPE (rela->r_info);
11717 switch (r_type)
11718 {
11719 case R_PPC64_RELATIVE:
11720 return reloc_class_relative;
11721 case R_PPC64_JMP_SLOT:
11722 return reloc_class_plt;
11723 case R_PPC64_COPY:
11724 return reloc_class_copy;
11725 default:
11726 return reloc_class_normal;
11727 }
11728 }
11729
11730 /* Finish up the dynamic sections. */
11731
11732 static bfd_boolean
11733 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11734 struct bfd_link_info *info)
11735 {
11736 struct ppc_link_hash_table *htab;
11737 bfd *dynobj;
11738 asection *sdyn;
11739
11740 htab = ppc_hash_table (info);
11741 dynobj = htab->elf.dynobj;
11742 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11743
11744 if (htab->elf.dynamic_sections_created)
11745 {
11746 Elf64_External_Dyn *dyncon, *dynconend;
11747
11748 if (sdyn == NULL || htab->got == NULL)
11749 abort ();
11750
11751 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11752 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11753 for (; dyncon < dynconend; dyncon++)
11754 {
11755 Elf_Internal_Dyn dyn;
11756 asection *s;
11757
11758 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11759
11760 switch (dyn.d_tag)
11761 {
11762 default:
11763 continue;
11764
11765 case DT_PPC64_GLINK:
11766 s = htab->glink;
11767 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11768 /* We stupidly defined DT_PPC64_GLINK to be the start
11769 of glink rather than the first entry point, which is
11770 what ld.so needs, and now have a bigger stub to
11771 support automatic multiple TOCs. */
11772 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11773 break;
11774
11775 case DT_PPC64_OPD:
11776 s = bfd_get_section_by_name (output_bfd, ".opd");
11777 if (s == NULL)
11778 continue;
11779 dyn.d_un.d_ptr = s->vma;
11780 break;
11781
11782 case DT_PPC64_OPDSZ:
11783 s = bfd_get_section_by_name (output_bfd, ".opd");
11784 if (s == NULL)
11785 continue;
11786 dyn.d_un.d_val = s->size;
11787 break;
11788
11789 case DT_PLTGOT:
11790 s = htab->plt;
11791 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11792 break;
11793
11794 case DT_JMPREL:
11795 s = htab->relplt;
11796 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11797 break;
11798
11799 case DT_PLTRELSZ:
11800 dyn.d_un.d_val = htab->relplt->size;
11801 break;
11802
11803 case DT_RELASZ:
11804 /* Don't count procedure linkage table relocs in the
11805 overall reloc count. */
11806 s = htab->relplt;
11807 if (s == NULL)
11808 continue;
11809 dyn.d_un.d_val -= s->size;
11810 break;
11811
11812 case DT_RELA:
11813 /* We may not be using the standard ELF linker script.
11814 If .rela.plt is the first .rela section, we adjust
11815 DT_RELA to not include it. */
11816 s = htab->relplt;
11817 if (s == NULL)
11818 continue;
11819 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11820 continue;
11821 dyn.d_un.d_ptr += s->size;
11822 break;
11823 }
11824
11825 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11826 }
11827 }
11828
11829 if (htab->got != NULL && htab->got->size != 0)
11830 {
11831 /* Fill in the first entry in the global offset table.
11832 We use it to hold the link-time TOCbase. */
11833 bfd_put_64 (output_bfd,
11834 elf_gp (output_bfd) + TOC_BASE_OFF,
11835 htab->got->contents);
11836
11837 /* Set .got entry size. */
11838 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11839 }
11840
11841 if (htab->plt != NULL && htab->plt->size != 0)
11842 {
11843 /* Set .plt entry size. */
11844 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11845 = PLT_ENTRY_SIZE;
11846 }
11847
11848 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11849 brlt ourselves if emitrelocations. */
11850 if (htab->brlt != NULL
11851 && htab->brlt->reloc_count != 0
11852 && !_bfd_elf_link_output_relocs (output_bfd,
11853 htab->brlt,
11854 &elf_section_data (htab->brlt)->rel_hdr,
11855 elf_section_data (htab->brlt)->relocs,
11856 NULL))
11857 return FALSE;
11858
11859 if (htab->glink != NULL
11860 && htab->glink->reloc_count != 0
11861 && !_bfd_elf_link_output_relocs (output_bfd,
11862 htab->glink,
11863 &elf_section_data (htab->glink)->rel_hdr,
11864 elf_section_data (htab->glink)->relocs,
11865 NULL))
11866 return FALSE;
11867
11868 /* We need to handle writing out multiple GOT sections ourselves,
11869 since we didn't add them to DYNOBJ. We know dynobj is the first
11870 bfd. */
11871 while ((dynobj = dynobj->link_next) != NULL)
11872 {
11873 asection *s;
11874
11875 if (!is_ppc64_elf (dynobj))
11876 continue;
11877
11878 s = ppc64_elf_tdata (dynobj)->got;
11879 if (s != NULL
11880 && s->size != 0
11881 && s->output_section != bfd_abs_section_ptr
11882 && !bfd_set_section_contents (output_bfd, s->output_section,
11883 s->contents, s->output_offset,
11884 s->size))
11885 return FALSE;
11886 s = ppc64_elf_tdata (dynobj)->relgot;
11887 if (s != NULL
11888 && s->size != 0
11889 && s->output_section != bfd_abs_section_ptr
11890 && !bfd_set_section_contents (output_bfd, s->output_section,
11891 s->contents, s->output_offset,
11892 s->size))
11893 return FALSE;
11894 }
11895
11896 return TRUE;
11897 }
11898
11899 #include "elf64-target.h"
GDB Binutils - Deliverables
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