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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 2009, 2010, 2011 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.
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 #include "dwarf2.h"
38
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *);
59
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_default_execstack 0
80
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
90
91 #define elf_backend_object_p ppc64_elf_object_p
92 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94 #define elf_backend_write_core_note ppc64_elf_write_core_note
95 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98 #define elf_backend_check_directives ppc64_elf_process_dot_syms
99 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
100 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101 #define elf_backend_check_relocs ppc64_elf_check_relocs
102 #define elf_backend_gc_keep ppc64_elf_gc_keep
103 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
111 #define elf_backend_action_discarded ppc64_elf_action_discarded
112 #define elf_backend_relocate_section ppc64_elf_relocate_section
113 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
114 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
115 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
116 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
117 #define elf_backend_special_sections ppc64_elf_special_sections
118 #define elf_backend_post_process_headers _bfd_elf_set_osabi
119
120 /* The name of the dynamic interpreter. This is put in the .interp
121 section. */
122 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
123
124 /* The size in bytes of an entry in the procedure linkage table. */
125 #define PLT_ENTRY_SIZE 24
126
127 /* The initial size of the plt reserved for the dynamic linker. */
128 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
129
130 /* TOC base pointers offset from start of TOC. */
131 #define TOC_BASE_OFF 0x8000
132
133 /* Offset of tp and dtp pointers from start of TLS block. */
134 #define TP_OFFSET 0x7000
135 #define DTP_OFFSET 0x8000
136
137 /* .plt call stub instructions. The normal stub is like this, but
138 sometimes the .plt entry crosses a 64k boundary and we need to
139 insert an addi to adjust r12. */
140 #define PLT_CALL_STUB_SIZE (7*4)
141 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
142 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
143 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
144 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
145 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
146 /* ld %r11,xxx+16@l(%r12) */
147 #define BCTR 0x4e800420 /* bctr */
148
149
150 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
151 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
152 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
153 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
154
155 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
156 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
157
158 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
159
160 /* glink call stub instructions. We enter with the index in R0. */
161 #define GLINK_CALL_STUB_SIZE (16*4)
162 /* 0: */
163 /* .quad plt0-1f */
164 /* __glink: */
165 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
166 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
167 /* 1: */
168 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
169 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
170 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
171 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
172 /* ld %11,0(%12) */
173 /* ld %2,8(%12) */
174 /* mtctr %11 */
175 /* ld %11,16(%12) */
176 /* bctr */
177
178 /* Pad with this. */
179 #define NOP 0x60000000
180
181 /* Some other nops. */
182 #define CROR_151515 0x4def7b82
183 #define CROR_313131 0x4ffffb82
184
185 /* .glink entries for the first 32k functions are two instructions. */
186 #define LI_R0_0 0x38000000 /* li %r0,0 */
187 #define B_DOT 0x48000000 /* b . */
188
189 /* After that, we need two instructions to load the index, followed by
190 a branch. */
191 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
192 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
193
194 /* Instructions used by the save and restore reg functions. */
195 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
196 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
197 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
198 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
199 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
200 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
201 #define LI_R12_0 0x39800000 /* li %r12,0 */
202 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
203 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
204 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
205 #define BLR 0x4e800020 /* blr */
206
207 /* Since .opd is an array of descriptors and each entry will end up
208 with identical R_PPC64_RELATIVE relocs, there is really no need to
209 propagate .opd relocs; The dynamic linker should be taught to
210 relocate .opd without reloc entries. */
211 #ifndef NO_OPD_RELOCS
212 #define NO_OPD_RELOCS 0
213 #endif
214 \f
215 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
216
217 /* Relocation HOWTO's. */
218 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
219
220 static reloc_howto_type ppc64_elf_howto_raw[] = {
221 /* This reloc does nothing. */
222 HOWTO (R_PPC64_NONE, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 32, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_dont, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC64_NONE", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 32 bit relocation. */
237 HOWTO (R_PPC64_ADDR32, /* type */
238 0, /* rightshift */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
240 32, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR32", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffffffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* An absolute 26 bit branch; the lower two bits must be zero.
252 FIXME: we don't check that, we just clear them. */
253 HOWTO (R_PPC64_ADDR24, /* type */
254 0, /* rightshift */
255 2, /* size (0 = byte, 1 = short, 2 = long) */
256 26, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_bitfield, /* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_PPC64_ADDR24", /* name */
262 FALSE, /* partial_inplace */
263 0, /* src_mask */
264 0x03fffffc, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* A standard 16 bit relocation. */
268 HOWTO (R_PPC64_ADDR16, /* type */
269 0, /* rightshift */
270 1, /* size (0 = byte, 1 = short, 2 = long) */
271 16, /* bitsize */
272 FALSE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_bitfield, /* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_PPC64_ADDR16", /* name */
277 FALSE, /* partial_inplace */
278 0, /* src_mask */
279 0xffff, /* dst_mask */
280 FALSE), /* pcrel_offset */
281
282 /* A 16 bit relocation without overflow. */
283 HOWTO (R_PPC64_ADDR16_LO, /* type */
284 0, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_PPC64_ADDR16_LO", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* Bits 16-31 of an address. */
298 HOWTO (R_PPC64_ADDR16_HI, /* type */
299 16, /* rightshift */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_dont, /* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_PPC64_ADDR16_HI", /* name */
307 FALSE, /* partial_inplace */
308 0, /* src_mask */
309 0xffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
313 bits, treated as a signed number, is negative. */
314 HOWTO (R_PPC64_ADDR16_HA, /* type */
315 16, /* rightshift */
316 1, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_dont, /* complain_on_overflow */
321 ppc64_elf_ha_reloc, /* special_function */
322 "R_PPC64_ADDR16_HA", /* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0xffff, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* An absolute 16 bit branch; the lower two bits must be zero.
329 FIXME: we don't check that, we just clear them. */
330 HOWTO (R_PPC64_ADDR14, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_branch_reloc, /* special_function */
338 "R_PPC64_ADDR14", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is expected to be taken. The lower two
346 bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* An absolute 16 bit branch, for which bit 10 should be set to
362 indicate that the branch is not expected to be taken. The lower
363 two bits must be zero. */
364 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
365 0, /* rightshift */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
367 16, /* bitsize */
368 FALSE, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_bitfield, /* complain_on_overflow */
371 ppc64_elf_brtaken_reloc, /* special_function */
372 "R_PPC64_ADDR14_BRNTAKEN",/* name */
373 FALSE, /* partial_inplace */
374 0, /* src_mask */
375 0x0000fffc, /* dst_mask */
376 FALSE), /* pcrel_offset */
377
378 /* A relative 26 bit branch; the lower two bits must be zero. */
379 HOWTO (R_PPC64_REL24, /* type */
380 0, /* rightshift */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
382 26, /* bitsize */
383 TRUE, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_signed, /* complain_on_overflow */
386 ppc64_elf_branch_reloc, /* special_function */
387 "R_PPC64_REL24", /* name */
388 FALSE, /* partial_inplace */
389 0, /* src_mask */
390 0x03fffffc, /* dst_mask */
391 TRUE), /* pcrel_offset */
392
393 /* A relative 16 bit branch; the lower two bits must be zero. */
394 HOWTO (R_PPC64_REL14, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_branch_reloc, /* special_function */
402 "R_PPC64_REL14", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is expected to be taken. The lower two bits must be
410 zero. */
411 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRTAKEN", /* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* A relative 16 bit branch. Bit 10 should be set to indicate that
426 the branch is not expected to be taken. The lower two bits must
427 be zero. */
428 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
429 0, /* rightshift */
430 2, /* size (0 = byte, 1 = short, 2 = long) */
431 16, /* bitsize */
432 TRUE, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_signed, /* complain_on_overflow */
435 ppc64_elf_brtaken_reloc, /* special_function */
436 "R_PPC64_REL14_BRNTAKEN",/* name */
437 FALSE, /* partial_inplace */
438 0, /* src_mask */
439 0x0000fffc, /* dst_mask */
440 TRUE), /* pcrel_offset */
441
442 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
443 symbol. */
444 HOWTO (R_PPC64_GOT16, /* type */
445 0, /* rightshift */
446 1, /* size (0 = byte, 1 = short, 2 = long) */
447 16, /* bitsize */
448 FALSE, /* pc_relative */
449 0, /* bitpos */
450 complain_overflow_signed, /* complain_on_overflow */
451 ppc64_elf_unhandled_reloc, /* special_function */
452 "R_PPC64_GOT16", /* name */
453 FALSE, /* partial_inplace */
454 0, /* src_mask */
455 0xffff, /* dst_mask */
456 FALSE), /* pcrel_offset */
457
458 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
459 the symbol. */
460 HOWTO (R_PPC64_GOT16_LO, /* type */
461 0, /* rightshift */
462 1, /* size (0 = byte, 1 = short, 2 = long) */
463 16, /* bitsize */
464 FALSE, /* pc_relative */
465 0, /* bitpos */
466 complain_overflow_dont, /* complain_on_overflow */
467 ppc64_elf_unhandled_reloc, /* special_function */
468 "R_PPC64_GOT16_LO", /* name */
469 FALSE, /* partial_inplace */
470 0, /* src_mask */
471 0xffff, /* dst_mask */
472 FALSE), /* pcrel_offset */
473
474 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
475 the symbol. */
476 HOWTO (R_PPC64_GOT16_HI, /* type */
477 16, /* rightshift */
478 1, /* size (0 = byte, 1 = short, 2 = long) */
479 16, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_dont,/* complain_on_overflow */
483 ppc64_elf_unhandled_reloc, /* special_function */
484 "R_PPC64_GOT16_HI", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0xffff, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
491 the symbol. */
492 HOWTO (R_PPC64_GOT16_HA, /* type */
493 16, /* rightshift */
494 1, /* size (0 = byte, 1 = short, 2 = long) */
495 16, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont,/* complain_on_overflow */
499 ppc64_elf_unhandled_reloc, /* special_function */
500 "R_PPC64_GOT16_HA", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* This is used only by the dynamic linker. The symbol should exist
507 both in the object being run and in some shared library. The
508 dynamic linker copies the data addressed by the symbol from the
509 shared library into the object, because the object being
510 run has to have the data at some particular address. */
511 HOWTO (R_PPC64_COPY, /* type */
512 0, /* rightshift */
513 0, /* this one is variable size */
514 0, /* bitsize */
515 FALSE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont, /* complain_on_overflow */
518 ppc64_elf_unhandled_reloc, /* special_function */
519 "R_PPC64_COPY", /* name */
520 FALSE, /* partial_inplace */
521 0, /* src_mask */
522 0, /* dst_mask */
523 FALSE), /* pcrel_offset */
524
525 /* Like R_PPC64_ADDR64, but used when setting global offset table
526 entries. */
527 HOWTO (R_PPC64_GLOB_DAT, /* type */
528 0, /* rightshift */
529 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
530 64, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont, /* complain_on_overflow */
534 ppc64_elf_unhandled_reloc, /* special_function */
535 "R_PPC64_GLOB_DAT", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 ONES (64), /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Created by the link editor. Marks a procedure linkage table
542 entry for a symbol. */
543 HOWTO (R_PPC64_JMP_SLOT, /* type */
544 0, /* rightshift */
545 0, /* size (0 = byte, 1 = short, 2 = long) */
546 0, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 ppc64_elf_unhandled_reloc, /* special_function */
551 "R_PPC64_JMP_SLOT", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 0, /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Used only by the dynamic linker. When the object is run, this
558 doubleword64 is set to the load address of the object, plus the
559 addend. */
560 HOWTO (R_PPC64_RELATIVE, /* type */
561 0, /* rightshift */
562 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
563 64, /* bitsize */
564 FALSE, /* pc_relative */
565 0, /* bitpos */
566 complain_overflow_dont, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_PPC64_RELATIVE", /* name */
569 FALSE, /* partial_inplace */
570 0, /* src_mask */
571 ONES (64), /* dst_mask */
572 FALSE), /* pcrel_offset */
573
574 /* Like R_PPC64_ADDR32, but may be unaligned. */
575 HOWTO (R_PPC64_UADDR32, /* type */
576 0, /* rightshift */
577 2, /* size (0 = byte, 1 = short, 2 = long) */
578 32, /* bitsize */
579 FALSE, /* pc_relative */
580 0, /* bitpos */
581 complain_overflow_bitfield, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC64_UADDR32", /* name */
584 FALSE, /* partial_inplace */
585 0, /* src_mask */
586 0xffffffff, /* dst_mask */
587 FALSE), /* pcrel_offset */
588
589 /* Like R_PPC64_ADDR16, but may be unaligned. */
590 HOWTO (R_PPC64_UADDR16, /* type */
591 0, /* rightshift */
592 1, /* size (0 = byte, 1 = short, 2 = long) */
593 16, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_bitfield, /* complain_on_overflow */
597 bfd_elf_generic_reloc, /* special_function */
598 "R_PPC64_UADDR16", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffff, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* 32-bit PC relative. */
605 HOWTO (R_PPC64_REL32, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 32, /* bitsize */
609 TRUE, /* pc_relative */
610 0, /* bitpos */
611 /* FIXME: Verify. Was complain_overflow_bitfield. */
612 complain_overflow_signed, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC64_REL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* 32-bit relocation to the symbol's procedure linkage table. */
621 HOWTO (R_PPC64_PLT32, /* type */
622 0, /* rightshift */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
624 32, /* bitsize */
625 FALSE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_bitfield, /* complain_on_overflow */
628 ppc64_elf_unhandled_reloc, /* special_function */
629 "R_PPC64_PLT32", /* name */
630 FALSE, /* partial_inplace */
631 0, /* src_mask */
632 0xffffffff, /* dst_mask */
633 FALSE), /* pcrel_offset */
634
635 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
636 FIXME: R_PPC64_PLTREL32 not supported. */
637 HOWTO (R_PPC64_PLTREL32, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 32, /* bitsize */
641 TRUE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_signed, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_PLTREL32", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffffffff, /* dst_mask */
649 TRUE), /* pcrel_offset */
650
651 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
652 the symbol. */
653 HOWTO (R_PPC64_PLT16_LO, /* type */
654 0, /* rightshift */
655 1, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 ppc64_elf_unhandled_reloc, /* special_function */
661 "R_PPC64_PLT16_LO", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0xffff, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
668 the symbol. */
669 HOWTO (R_PPC64_PLT16_HI, /* type */
670 16, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_dont, /* complain_on_overflow */
676 ppc64_elf_unhandled_reloc, /* special_function */
677 "R_PPC64_PLT16_HI", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
684 the symbol. */
685 HOWTO (R_PPC64_PLT16_HA, /* type */
686 16, /* rightshift */
687 1, /* size (0 = byte, 1 = short, 2 = long) */
688 16, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_dont, /* complain_on_overflow */
692 ppc64_elf_unhandled_reloc, /* special_function */
693 "R_PPC64_PLT16_HA", /* name */
694 FALSE, /* partial_inplace */
695 0, /* src_mask */
696 0xffff, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 /* 16-bit section relative relocation. */
700 HOWTO (R_PPC64_SECTOFF, /* type */
701 0, /* rightshift */
702 1, /* size (0 = byte, 1 = short, 2 = long) */
703 16, /* bitsize */
704 FALSE, /* pc_relative */
705 0, /* bitpos */
706 complain_overflow_bitfield, /* complain_on_overflow */
707 ppc64_elf_sectoff_reloc, /* special_function */
708 "R_PPC64_SECTOFF", /* name */
709 FALSE, /* partial_inplace */
710 0, /* src_mask */
711 0xffff, /* dst_mask */
712 FALSE), /* pcrel_offset */
713
714 /* Like R_PPC64_SECTOFF, but no overflow warning. */
715 HOWTO (R_PPC64_SECTOFF_LO, /* type */
716 0, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_dont, /* complain_on_overflow */
722 ppc64_elf_sectoff_reloc, /* special_function */
723 "R_PPC64_SECTOFF_LO", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* 16-bit upper half section relative relocation. */
730 HOWTO (R_PPC64_SECTOFF_HI, /* type */
731 16, /* rightshift */
732 1, /* size (0 = byte, 1 = short, 2 = long) */
733 16, /* bitsize */
734 FALSE, /* pc_relative */
735 0, /* bitpos */
736 complain_overflow_dont, /* complain_on_overflow */
737 ppc64_elf_sectoff_reloc, /* special_function */
738 "R_PPC64_SECTOFF_HI", /* name */
739 FALSE, /* partial_inplace */
740 0, /* src_mask */
741 0xffff, /* dst_mask */
742 FALSE), /* pcrel_offset */
743
744 /* 16-bit upper half adjusted section relative relocation. */
745 HOWTO (R_PPC64_SECTOFF_HA, /* type */
746 16, /* rightshift */
747 1, /* size (0 = byte, 1 = short, 2 = long) */
748 16, /* bitsize */
749 FALSE, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_dont, /* complain_on_overflow */
752 ppc64_elf_sectoff_ha_reloc, /* special_function */
753 "R_PPC64_SECTOFF_HA", /* name */
754 FALSE, /* partial_inplace */
755 0, /* src_mask */
756 0xffff, /* dst_mask */
757 FALSE), /* pcrel_offset */
758
759 /* Like R_PPC64_REL24 without touching the two least significant bits. */
760 HOWTO (R_PPC64_REL30, /* type */
761 2, /* rightshift */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
763 30, /* bitsize */
764 TRUE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_REL30", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 0xfffffffc, /* dst_mask */
772 TRUE), /* pcrel_offset */
773
774 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
775
776 /* A standard 64-bit relocation. */
777 HOWTO (R_PPC64_ADDR64, /* type */
778 0, /* rightshift */
779 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
780 64, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_PPC64_ADDR64", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 ONES (64), /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 /* The bits 32-47 of an address. */
792 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
793 32, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 FALSE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_PPC64_ADDR16_HIGHER", /* name */
801 FALSE, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 FALSE), /* pcrel_offset */
805
806 /* The bits 32-47 of an address, plus 1 if the contents of the low
807 16 bits, treated as a signed number, is negative. */
808 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
809 32, /* rightshift */
810 1, /* size (0 = byte, 1 = short, 2 = long) */
811 16, /* bitsize */
812 FALSE, /* pc_relative */
813 0, /* bitpos */
814 complain_overflow_dont, /* complain_on_overflow */
815 ppc64_elf_ha_reloc, /* special_function */
816 "R_PPC64_ADDR16_HIGHERA", /* name */
817 FALSE, /* partial_inplace */
818 0, /* src_mask */
819 0xffff, /* dst_mask */
820 FALSE), /* pcrel_offset */
821
822 /* The bits 48-63 of an address. */
823 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
824 48, /* rightshift */
825 1, /* size (0 = byte, 1 = short, 2 = long) */
826 16, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR16_HIGHEST", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 0xffff, /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 48-63 of an address, plus 1 if the contents of the low
838 16 bits, treated as a signed number, is negative. */
839 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
840 48, /* rightshift */
841 1, /* size (0 = byte, 1 = short, 2 = long) */
842 16, /* bitsize */
843 FALSE, /* pc_relative */
844 0, /* bitpos */
845 complain_overflow_dont, /* complain_on_overflow */
846 ppc64_elf_ha_reloc, /* special_function */
847 "R_PPC64_ADDR16_HIGHESTA", /* name */
848 FALSE, /* partial_inplace */
849 0, /* src_mask */
850 0xffff, /* dst_mask */
851 FALSE), /* pcrel_offset */
852
853 /* Like ADDR64, but may be unaligned. */
854 HOWTO (R_PPC64_UADDR64, /* type */
855 0, /* rightshift */
856 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
857 64, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 bfd_elf_generic_reloc, /* special_function */
862 "R_PPC64_UADDR64", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 ONES (64), /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* 64-bit relative relocation. */
869 HOWTO (R_PPC64_REL64, /* type */
870 0, /* rightshift */
871 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
872 64, /* bitsize */
873 TRUE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_REL64", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 ONES (64), /* dst_mask */
881 TRUE), /* pcrel_offset */
882
883 /* 64-bit relocation to the symbol's procedure linkage table. */
884 HOWTO (R_PPC64_PLT64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLT64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* 64-bit PC relative relocation to the symbol's procedure linkage
899 table. */
900 /* FIXME: R_PPC64_PLTREL64 not supported. */
901 HOWTO (R_PPC64_PLTREL64, /* type */
902 0, /* rightshift */
903 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
904 64, /* bitsize */
905 TRUE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_dont, /* complain_on_overflow */
908 ppc64_elf_unhandled_reloc, /* special_function */
909 "R_PPC64_PLTREL64", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 ONES (64), /* dst_mask */
913 TRUE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation. */
916
917 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
918 HOWTO (R_PPC64_TOC16, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_signed, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation without overflow. */
933
934 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_LO, /* type */
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_LO", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits. */
950
951 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
952 HOWTO (R_PPC64_TOC16_HI, /* type */
953 16, /* rightshift */
954 1, /* size (0 = byte, 1 = short, 2 = long) */
955 16, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_toc_reloc, /* special_function */
960 "R_PPC64_TOC16_HI", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 0xffff, /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
967 contents of the low 16 bits, treated as a signed number, is
968 negative. */
969
970 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
971 HOWTO (R_PPC64_TOC16_HA, /* type */
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc64_elf_toc_ha_reloc, /* special_function */
979 "R_PPC64_TOC16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* 64-bit relocation; insert value of TOC base (.TOC.). */
986
987 /* R_PPC64_TOC 51 doubleword64 .TOC. */
988 HOWTO (R_PPC64_TOC, /* type */
989 0, /* rightshift */
990 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
991 64, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_bitfield, /* complain_on_overflow */
995 ppc64_elf_toc64_reloc, /* special_function */
996 "R_PPC64_TOC", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 ONES (64), /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like R_PPC64_GOT16, but also informs the link editor that the
1003 value to relocate may (!) refer to a PLT entry which the link
1004 editor (a) may replace with the symbol value. If the link editor
1005 is unable to fully resolve the symbol, it may (b) create a PLT
1006 entry and store the address to the new PLT entry in the GOT.
1007 This permits lazy resolution of function symbols at run time.
1008 The link editor may also skip all of this and just (c) emit a
1009 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1010 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1011 HOWTO (R_PPC64_PLTGOT16, /* type */
1012 0, /* rightshift */
1013 1, /* size (0 = byte, 1 = short, 2 = long) */
1014 16, /* bitsize */
1015 FALSE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_signed, /* complain_on_overflow */
1018 ppc64_elf_unhandled_reloc, /* special_function */
1019 "R_PPC64_PLTGOT16", /* name */
1020 FALSE, /* partial_inplace */
1021 0, /* src_mask */
1022 0xffff, /* dst_mask */
1023 FALSE), /* pcrel_offset */
1024
1025 /* Like R_PPC64_PLTGOT16, but without overflow. */
1026 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1027 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1028 0, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc64_elf_unhandled_reloc, /* special_function */
1035 "R_PPC64_PLTGOT16_LO", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1042 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1043 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1044 16, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont, /* complain_on_overflow */
1050 ppc64_elf_unhandled_reloc, /* special_function */
1051 "R_PPC64_PLTGOT16_HI", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xffff, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1058 1 if the contents of the low 16 bits, treated as a signed number,
1059 is negative. */
1060 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1061 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1062 16, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_dont,/* complain_on_overflow */
1068 ppc64_elf_unhandled_reloc, /* special_function */
1069 "R_PPC64_PLTGOT16_HA", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1076 HOWTO (R_PPC64_ADDR16_DS, /* type */
1077 0, /* rightshift */
1078 1, /* size (0 = byte, 1 = short, 2 = long) */
1079 16, /* bitsize */
1080 FALSE, /* pc_relative */
1081 0, /* bitpos */
1082 complain_overflow_bitfield, /* complain_on_overflow */
1083 bfd_elf_generic_reloc, /* special_function */
1084 "R_PPC64_ADDR16_DS", /* name */
1085 FALSE, /* partial_inplace */
1086 0, /* src_mask */
1087 0xfffc, /* dst_mask */
1088 FALSE), /* pcrel_offset */
1089
1090 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1091 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1092 0, /* rightshift */
1093 1, /* size (0 = byte, 1 = short, 2 = long) */
1094 16, /* bitsize */
1095 FALSE, /* pc_relative */
1096 0, /* bitpos */
1097 complain_overflow_dont,/* complain_on_overflow */
1098 bfd_elf_generic_reloc, /* special_function */
1099 "R_PPC64_ADDR16_LO_DS",/* name */
1100 FALSE, /* partial_inplace */
1101 0, /* src_mask */
1102 0xfffc, /* dst_mask */
1103 FALSE), /* pcrel_offset */
1104
1105 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1106 HOWTO (R_PPC64_GOT16_DS, /* type */
1107 0, /* rightshift */
1108 1, /* size (0 = byte, 1 = short, 2 = long) */
1109 16, /* bitsize */
1110 FALSE, /* pc_relative */
1111 0, /* bitpos */
1112 complain_overflow_signed, /* complain_on_overflow */
1113 ppc64_elf_unhandled_reloc, /* special_function */
1114 "R_PPC64_GOT16_DS", /* name */
1115 FALSE, /* partial_inplace */
1116 0, /* src_mask */
1117 0xfffc, /* dst_mask */
1118 FALSE), /* pcrel_offset */
1119
1120 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1121 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_dont, /* complain_on_overflow */
1128 ppc64_elf_unhandled_reloc, /* special_function */
1129 "R_PPC64_GOT16_LO_DS", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xfffc, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1136 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc64_elf_unhandled_reloc, /* special_function */
1144 "R_PPC64_PLT16_LO_DS", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xfffc, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1151 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1152 0, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_bitfield, /* complain_on_overflow */
1158 ppc64_elf_sectoff_reloc, /* special_function */
1159 "R_PPC64_SECTOFF_DS", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xfffc, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1166 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1167 0, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc64_elf_sectoff_reloc, /* special_function */
1174 "R_PPC64_SECTOFF_LO_DS",/* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xfffc, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1181 HOWTO (R_PPC64_TOC16_DS, /* type */
1182 0, /* rightshift */
1183 1, /* size (0 = byte, 1 = short, 2 = long) */
1184 16, /* bitsize */
1185 FALSE, /* pc_relative */
1186 0, /* bitpos */
1187 complain_overflow_signed, /* complain_on_overflow */
1188 ppc64_elf_toc_reloc, /* special_function */
1189 "R_PPC64_TOC16_DS", /* name */
1190 FALSE, /* partial_inplace */
1191 0, /* src_mask */
1192 0xfffc, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1194
1195 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1196 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1197 0, /* rightshift */
1198 1, /* size (0 = byte, 1 = short, 2 = long) */
1199 16, /* bitsize */
1200 FALSE, /* pc_relative */
1201 0, /* bitpos */
1202 complain_overflow_dont, /* complain_on_overflow */
1203 ppc64_elf_toc_reloc, /* special_function */
1204 "R_PPC64_TOC16_LO_DS", /* name */
1205 FALSE, /* partial_inplace */
1206 0, /* src_mask */
1207 0xfffc, /* dst_mask */
1208 FALSE), /* pcrel_offset */
1209
1210 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1211 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1212 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_signed, /* complain_on_overflow */
1219 ppc64_elf_unhandled_reloc, /* special_function */
1220 "R_PPC64_PLTGOT16_DS", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1227 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1228 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1229 0, /* rightshift */
1230 1, /* size (0 = byte, 1 = short, 2 = long) */
1231 16, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 ppc64_elf_unhandled_reloc, /* special_function */
1236 "R_PPC64_PLTGOT16_LO_DS",/* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 0xfffc, /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Marker relocs for TLS. */
1243 HOWTO (R_PPC64_TLS,
1244 0, /* rightshift */
1245 2, /* size (0 = byte, 1 = short, 2 = long) */
1246 32, /* bitsize */
1247 FALSE, /* pc_relative */
1248 0, /* bitpos */
1249 complain_overflow_dont, /* complain_on_overflow */
1250 bfd_elf_generic_reloc, /* special_function */
1251 "R_PPC64_TLS", /* name */
1252 FALSE, /* partial_inplace */
1253 0, /* src_mask */
1254 0, /* dst_mask */
1255 FALSE), /* pcrel_offset */
1256
1257 HOWTO (R_PPC64_TLSGD,
1258 0, /* rightshift */
1259 2, /* size (0 = byte, 1 = short, 2 = long) */
1260 32, /* bitsize */
1261 FALSE, /* pc_relative */
1262 0, /* bitpos */
1263 complain_overflow_dont, /* complain_on_overflow */
1264 bfd_elf_generic_reloc, /* special_function */
1265 "R_PPC64_TLSGD", /* name */
1266 FALSE, /* partial_inplace */
1267 0, /* src_mask */
1268 0, /* dst_mask */
1269 FALSE), /* pcrel_offset */
1270
1271 HOWTO (R_PPC64_TLSLD,
1272 0, /* rightshift */
1273 2, /* size (0 = byte, 1 = short, 2 = long) */
1274 32, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 bfd_elf_generic_reloc, /* special_function */
1279 "R_PPC64_TLSLD", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 0, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* Computes the load module index of the load module that contains the
1286 definition of its TLS sym. */
1287 HOWTO (R_PPC64_DTPMOD64,
1288 0, /* rightshift */
1289 4, /* size (0 = byte, 1 = short, 2 = long) */
1290 64, /* bitsize */
1291 FALSE, /* pc_relative */
1292 0, /* bitpos */
1293 complain_overflow_dont, /* complain_on_overflow */
1294 ppc64_elf_unhandled_reloc, /* special_function */
1295 "R_PPC64_DTPMOD64", /* name */
1296 FALSE, /* partial_inplace */
1297 0, /* src_mask */
1298 ONES (64), /* dst_mask */
1299 FALSE), /* pcrel_offset */
1300
1301 /* Computes a dtv-relative displacement, the difference between the value
1302 of sym+add and the base address of the thread-local storage block that
1303 contains the definition of sym, minus 0x8000. */
1304 HOWTO (R_PPC64_DTPREL64,
1305 0, /* rightshift */
1306 4, /* size (0 = byte, 1 = short, 2 = long) */
1307 64, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont, /* complain_on_overflow */
1311 ppc64_elf_unhandled_reloc, /* special_function */
1312 "R_PPC64_DTPREL64", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 ONES (64), /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* A 16 bit dtprel reloc. */
1319 HOWTO (R_PPC64_DTPREL16,
1320 0, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_signed, /* complain_on_overflow */
1326 ppc64_elf_unhandled_reloc, /* special_function */
1327 "R_PPC64_DTPREL16", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like DTPREL16, but no overflow. */
1334 HOWTO (R_PPC64_DTPREL16_LO,
1335 0, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc64_elf_unhandled_reloc, /* special_function */
1342 "R_PPC64_DTPREL16_LO", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1349 HOWTO (R_PPC64_DTPREL16_HI,
1350 16, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc64_elf_unhandled_reloc, /* special_function */
1357 "R_PPC64_DTPREL16_HI", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1364 HOWTO (R_PPC64_DTPREL16_HA,
1365 16, /* rightshift */
1366 1, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL16_HA", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1379 HOWTO (R_PPC64_DTPREL16_HIGHER,
1380 32, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_dont, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16_HIGHER", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1394 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1395 32, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_HIGHERA", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1410 48, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HIGHEST", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1425 48, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_dont, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16, but for insns with a DS field. */
1439 HOWTO (R_PPC64_DTPREL16_DS,
1440 0, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_signed, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_DS", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xfffc, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_DS, but no overflow. */
1454 HOWTO (R_PPC64_DTPREL16_LO_DS,
1455 0, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_LO_DS", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xfffc, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Computes a tp-relative displacement, the difference between the value of
1469 sym+add and the value of the thread pointer (r13). */
1470 HOWTO (R_PPC64_TPREL64,
1471 0, /* rightshift */
1472 4, /* size (0 = byte, 1 = short, 2 = long) */
1473 64, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 ppc64_elf_unhandled_reloc, /* special_function */
1478 "R_PPC64_TPREL64", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 ONES (64), /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* A 16 bit tprel reloc. */
1485 HOWTO (R_PPC64_TPREL16,
1486 0, /* rightshift */
1487 1, /* size (0 = byte, 1 = short, 2 = long) */
1488 16, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_signed, /* complain_on_overflow */
1492 ppc64_elf_unhandled_reloc, /* special_function */
1493 "R_PPC64_TPREL16", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0xffff, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Like TPREL16, but no overflow. */
1500 HOWTO (R_PPC64_TPREL16_LO,
1501 0, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_dont, /* complain_on_overflow */
1507 ppc64_elf_unhandled_reloc, /* special_function */
1508 "R_PPC64_TPREL16_LO", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 /* Like TPREL16_LO, but next higher group of 16 bits. */
1515 HOWTO (R_PPC64_TPREL16_HI,
1516 16, /* rightshift */
1517 1, /* size (0 = byte, 1 = short, 2 = long) */
1518 16, /* bitsize */
1519 FALSE, /* pc_relative */
1520 0, /* bitpos */
1521 complain_overflow_dont, /* complain_on_overflow */
1522 ppc64_elf_unhandled_reloc, /* special_function */
1523 "R_PPC64_TPREL16_HI", /* name */
1524 FALSE, /* partial_inplace */
1525 0, /* src_mask */
1526 0xffff, /* dst_mask */
1527 FALSE), /* pcrel_offset */
1528
1529 /* Like TPREL16_HI, but adjust for low 16 bits. */
1530 HOWTO (R_PPC64_TPREL16_HA,
1531 16, /* rightshift */
1532 1, /* size (0 = byte, 1 = short, 2 = long) */
1533 16, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL16_HA", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 0xffff, /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* Like TPREL16_HI, but next higher group of 16 bits. */
1545 HOWTO (R_PPC64_TPREL16_HIGHER,
1546 32, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_dont, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16_HIGHER", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1560 HOWTO (R_PPC64_TPREL16_HIGHERA,
1561 32, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_HIGHERA", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HIGHEST,
1576 48, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HIGHEST", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1591 48, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_dont, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HIGHESTA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16, but for insns with a DS field. */
1605 HOWTO (R_PPC64_TPREL16_DS,
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_TPREL16_DS", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xfffc, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_DS, but no overflow. */
1620 HOWTO (R_PPC64_TPREL16_LO_DS,
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_TPREL16_LO_DS", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xfffc, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1635 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1636 to the first entry relative to the TOC base (r2). */
1637 HOWTO (R_PPC64_GOT_TLSGD16,
1638 0, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_signed, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSGD16", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Like GOT_TLSGD16, but no overflow. */
1652 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1653 0, /* rightshift */
1654 1, /* size (0 = byte, 1 = short, 2 = long) */
1655 16, /* bitsize */
1656 FALSE, /* pc_relative */
1657 0, /* bitpos */
1658 complain_overflow_dont, /* complain_on_overflow */
1659 ppc64_elf_unhandled_reloc, /* special_function */
1660 "R_PPC64_GOT_TLSGD16_LO", /* name */
1661 FALSE, /* partial_inplace */
1662 0, /* src_mask */
1663 0xffff, /* dst_mask */
1664 FALSE), /* pcrel_offset */
1665
1666 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1667 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1668 16, /* rightshift */
1669 1, /* size (0 = byte, 1 = short, 2 = long) */
1670 16, /* bitsize */
1671 FALSE, /* pc_relative */
1672 0, /* bitpos */
1673 complain_overflow_dont, /* complain_on_overflow */
1674 ppc64_elf_unhandled_reloc, /* special_function */
1675 "R_PPC64_GOT_TLSGD16_HI", /* name */
1676 FALSE, /* partial_inplace */
1677 0, /* src_mask */
1678 0xffff, /* dst_mask */
1679 FALSE), /* pcrel_offset */
1680
1681 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1682 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1683 16, /* 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_TLSGD16_HA", /* name */
1691 FALSE, /* partial_inplace */
1692 0, /* src_mask */
1693 0xffff, /* dst_mask */
1694 FALSE), /* pcrel_offset */
1695
1696 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1697 with values (sym+add)@dtpmod and zero, and computes the offset to the
1698 first entry relative to the TOC base (r2). */
1699 HOWTO (R_PPC64_GOT_TLSLD16,
1700 0, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_signed, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_TLSLD16", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xffff, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Like GOT_TLSLD16, but no overflow. */
1714 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1715 0, /* rightshift */
1716 1, /* size (0 = byte, 1 = short, 2 = long) */
1717 16, /* bitsize */
1718 FALSE, /* pc_relative */
1719 0, /* bitpos */
1720 complain_overflow_dont, /* complain_on_overflow */
1721 ppc64_elf_unhandled_reloc, /* special_function */
1722 "R_PPC64_GOT_TLSLD16_LO", /* name */
1723 FALSE, /* partial_inplace */
1724 0, /* src_mask */
1725 0xffff, /* dst_mask */
1726 FALSE), /* pcrel_offset */
1727
1728 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1729 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1730 16, /* rightshift */
1731 1, /* size (0 = byte, 1 = short, 2 = long) */
1732 16, /* bitsize */
1733 FALSE, /* pc_relative */
1734 0, /* bitpos */
1735 complain_overflow_dont, /* complain_on_overflow */
1736 ppc64_elf_unhandled_reloc, /* special_function */
1737 "R_PPC64_GOT_TLSLD16_HI", /* name */
1738 FALSE, /* partial_inplace */
1739 0, /* src_mask */
1740 0xffff, /* dst_mask */
1741 FALSE), /* pcrel_offset */
1742
1743 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1744 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1745 16, /* rightshift */
1746 1, /* size (0 = byte, 1 = short, 2 = long) */
1747 16, /* bitsize */
1748 FALSE, /* pc_relative */
1749 0, /* bitpos */
1750 complain_overflow_dont, /* complain_on_overflow */
1751 ppc64_elf_unhandled_reloc, /* special_function */
1752 "R_PPC64_GOT_TLSLD16_HA", /* name */
1753 FALSE, /* partial_inplace */
1754 0, /* src_mask */
1755 0xffff, /* dst_mask */
1756 FALSE), /* pcrel_offset */
1757
1758 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1759 the offset to the entry relative to the TOC base (r2). */
1760 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1761 0, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_signed, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_DTPREL16_DS", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xfffc, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Like GOT_DTPREL16_DS, but no overflow. */
1775 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1776 0, /* rightshift */
1777 1, /* size (0 = byte, 1 = short, 2 = long) */
1778 16, /* bitsize */
1779 FALSE, /* pc_relative */
1780 0, /* bitpos */
1781 complain_overflow_dont, /* complain_on_overflow */
1782 ppc64_elf_unhandled_reloc, /* special_function */
1783 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1784 FALSE, /* partial_inplace */
1785 0, /* src_mask */
1786 0xfffc, /* dst_mask */
1787 FALSE), /* pcrel_offset */
1788
1789 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1790 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1791 16, /* rightshift */
1792 1, /* size (0 = byte, 1 = short, 2 = long) */
1793 16, /* bitsize */
1794 FALSE, /* pc_relative */
1795 0, /* bitpos */
1796 complain_overflow_dont, /* complain_on_overflow */
1797 ppc64_elf_unhandled_reloc, /* special_function */
1798 "R_PPC64_GOT_DTPREL16_HI", /* name */
1799 FALSE, /* partial_inplace */
1800 0, /* src_mask */
1801 0xffff, /* dst_mask */
1802 FALSE), /* pcrel_offset */
1803
1804 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1805 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1806 16, /* rightshift */
1807 1, /* size (0 = byte, 1 = short, 2 = long) */
1808 16, /* bitsize */
1809 FALSE, /* pc_relative */
1810 0, /* bitpos */
1811 complain_overflow_dont, /* complain_on_overflow */
1812 ppc64_elf_unhandled_reloc, /* special_function */
1813 "R_PPC64_GOT_DTPREL16_HA", /* name */
1814 FALSE, /* partial_inplace */
1815 0, /* src_mask */
1816 0xffff, /* dst_mask */
1817 FALSE), /* pcrel_offset */
1818
1819 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1820 offset to the entry relative to the TOC base (r2). */
1821 HOWTO (R_PPC64_GOT_TPREL16_DS,
1822 0, /* rightshift */
1823 1, /* size (0 = byte, 1 = short, 2 = long) */
1824 16, /* bitsize */
1825 FALSE, /* pc_relative */
1826 0, /* bitpos */
1827 complain_overflow_signed, /* complain_on_overflow */
1828 ppc64_elf_unhandled_reloc, /* special_function */
1829 "R_PPC64_GOT_TPREL16_DS", /* name */
1830 FALSE, /* partial_inplace */
1831 0, /* src_mask */
1832 0xfffc, /* dst_mask */
1833 FALSE), /* pcrel_offset */
1834
1835 /* Like GOT_TPREL16_DS, but no overflow. */
1836 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1837 0, /* rightshift */
1838 1, /* size (0 = byte, 1 = short, 2 = long) */
1839 16, /* bitsize */
1840 FALSE, /* pc_relative */
1841 0, /* bitpos */
1842 complain_overflow_dont, /* complain_on_overflow */
1843 ppc64_elf_unhandled_reloc, /* special_function */
1844 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1845 FALSE, /* partial_inplace */
1846 0, /* src_mask */
1847 0xfffc, /* dst_mask */
1848 FALSE), /* pcrel_offset */
1849
1850 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1851 HOWTO (R_PPC64_GOT_TPREL16_HI,
1852 16, /* rightshift */
1853 1, /* size (0 = byte, 1 = short, 2 = long) */
1854 16, /* bitsize */
1855 FALSE, /* pc_relative */
1856 0, /* bitpos */
1857 complain_overflow_dont, /* complain_on_overflow */
1858 ppc64_elf_unhandled_reloc, /* special_function */
1859 "R_PPC64_GOT_TPREL16_HI", /* name */
1860 FALSE, /* partial_inplace */
1861 0, /* src_mask */
1862 0xffff, /* dst_mask */
1863 FALSE), /* pcrel_offset */
1864
1865 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1866 HOWTO (R_PPC64_GOT_TPREL16_HA,
1867 16, /* rightshift */
1868 1, /* size (0 = byte, 1 = short, 2 = long) */
1869 16, /* bitsize */
1870 FALSE, /* pc_relative */
1871 0, /* bitpos */
1872 complain_overflow_dont, /* complain_on_overflow */
1873 ppc64_elf_unhandled_reloc, /* special_function */
1874 "R_PPC64_GOT_TPREL16_HA", /* name */
1875 FALSE, /* partial_inplace */
1876 0, /* src_mask */
1877 0xffff, /* dst_mask */
1878 FALSE), /* pcrel_offset */
1879
1880 HOWTO (R_PPC64_JMP_IREL, /* type */
1881 0, /* rightshift */
1882 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1883 0, /* bitsize */
1884 FALSE, /* pc_relative */
1885 0, /* bitpos */
1886 complain_overflow_dont, /* complain_on_overflow */
1887 ppc64_elf_unhandled_reloc, /* special_function */
1888 "R_PPC64_JMP_IREL", /* name */
1889 FALSE, /* partial_inplace */
1890 0, /* src_mask */
1891 0, /* dst_mask */
1892 FALSE), /* pcrel_offset */
1893
1894 HOWTO (R_PPC64_IRELATIVE, /* type */
1895 0, /* rightshift */
1896 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1897 64, /* bitsize */
1898 FALSE, /* pc_relative */
1899 0, /* bitpos */
1900 complain_overflow_dont, /* complain_on_overflow */
1901 bfd_elf_generic_reloc, /* special_function */
1902 "R_PPC64_IRELATIVE", /* name */
1903 FALSE, /* partial_inplace */
1904 0, /* src_mask */
1905 ONES (64), /* dst_mask */
1906 FALSE), /* pcrel_offset */
1907
1908 /* A 16 bit relative relocation. */
1909 HOWTO (R_PPC64_REL16, /* type */
1910 0, /* rightshift */
1911 1, /* size (0 = byte, 1 = short, 2 = long) */
1912 16, /* bitsize */
1913 TRUE, /* pc_relative */
1914 0, /* bitpos */
1915 complain_overflow_bitfield, /* complain_on_overflow */
1916 bfd_elf_generic_reloc, /* special_function */
1917 "R_PPC64_REL16", /* name */
1918 FALSE, /* partial_inplace */
1919 0, /* src_mask */
1920 0xffff, /* dst_mask */
1921 TRUE), /* pcrel_offset */
1922
1923 /* A 16 bit relative relocation without overflow. */
1924 HOWTO (R_PPC64_REL16_LO, /* type */
1925 0, /* rightshift */
1926 1, /* size (0 = byte, 1 = short, 2 = long) */
1927 16, /* bitsize */
1928 TRUE, /* pc_relative */
1929 0, /* bitpos */
1930 complain_overflow_dont,/* complain_on_overflow */
1931 bfd_elf_generic_reloc, /* special_function */
1932 "R_PPC64_REL16_LO", /* name */
1933 FALSE, /* partial_inplace */
1934 0, /* src_mask */
1935 0xffff, /* dst_mask */
1936 TRUE), /* pcrel_offset */
1937
1938 /* The high order 16 bits of a relative address. */
1939 HOWTO (R_PPC64_REL16_HI, /* type */
1940 16, /* rightshift */
1941 1, /* size (0 = byte, 1 = short, 2 = long) */
1942 16, /* bitsize */
1943 TRUE, /* pc_relative */
1944 0, /* bitpos */
1945 complain_overflow_dont, /* complain_on_overflow */
1946 bfd_elf_generic_reloc, /* special_function */
1947 "R_PPC64_REL16_HI", /* name */
1948 FALSE, /* partial_inplace */
1949 0, /* src_mask */
1950 0xffff, /* dst_mask */
1951 TRUE), /* pcrel_offset */
1952
1953 /* The high order 16 bits of a relative address, plus 1 if the contents of
1954 the low 16 bits, treated as a signed number, is negative. */
1955 HOWTO (R_PPC64_REL16_HA, /* type */
1956 16, /* rightshift */
1957 1, /* size (0 = byte, 1 = short, 2 = long) */
1958 16, /* bitsize */
1959 TRUE, /* pc_relative */
1960 0, /* bitpos */
1961 complain_overflow_dont, /* complain_on_overflow */
1962 ppc64_elf_ha_reloc, /* special_function */
1963 "R_PPC64_REL16_HA", /* name */
1964 FALSE, /* partial_inplace */
1965 0, /* src_mask */
1966 0xffff, /* dst_mask */
1967 TRUE), /* pcrel_offset */
1968
1969 /* GNU extension to record C++ vtable hierarchy. */
1970 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1971 0, /* rightshift */
1972 0, /* size (0 = byte, 1 = short, 2 = long) */
1973 0, /* bitsize */
1974 FALSE, /* pc_relative */
1975 0, /* bitpos */
1976 complain_overflow_dont, /* complain_on_overflow */
1977 NULL, /* special_function */
1978 "R_PPC64_GNU_VTINHERIT", /* name */
1979 FALSE, /* partial_inplace */
1980 0, /* src_mask */
1981 0, /* dst_mask */
1982 FALSE), /* pcrel_offset */
1983
1984 /* GNU extension to record C++ vtable member usage. */
1985 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1986 0, /* rightshift */
1987 0, /* size (0 = byte, 1 = short, 2 = long) */
1988 0, /* bitsize */
1989 FALSE, /* pc_relative */
1990 0, /* bitpos */
1991 complain_overflow_dont, /* complain_on_overflow */
1992 NULL, /* special_function */
1993 "R_PPC64_GNU_VTENTRY", /* name */
1994 FALSE, /* partial_inplace */
1995 0, /* src_mask */
1996 0, /* dst_mask */
1997 FALSE), /* pcrel_offset */
1998 };
1999
2000 \f
2001 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2002 be done. */
2003
2004 static void
2005 ppc_howto_init (void)
2006 {
2007 unsigned int i, type;
2008
2009 for (i = 0;
2010 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2011 i++)
2012 {
2013 type = ppc64_elf_howto_raw[i].type;
2014 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2015 / sizeof (ppc64_elf_howto_table[0])));
2016 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2017 }
2018 }
2019
2020 static reloc_howto_type *
2021 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2022 bfd_reloc_code_real_type code)
2023 {
2024 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2025
2026 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2027 /* Initialize howto table if needed. */
2028 ppc_howto_init ();
2029
2030 switch (code)
2031 {
2032 default:
2033 return NULL;
2034
2035 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2036 break;
2037 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2038 break;
2039 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2040 break;
2041 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2042 break;
2043 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2044 break;
2045 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2046 break;
2047 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2048 break;
2049 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2050 break;
2051 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2052 break;
2053 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2054 break;
2055 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2056 break;
2057 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2058 break;
2059 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2060 break;
2061 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2062 break;
2063 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2064 break;
2065 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2066 break;
2067 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2068 break;
2069 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2070 break;
2071 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2072 break;
2073 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2074 break;
2075 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2076 break;
2077 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2078 break;
2079 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2080 break;
2081 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2082 break;
2083 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2084 break;
2085 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2086 break;
2087 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2088 break;
2089 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2090 break;
2091 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2092 break;
2093 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2094 break;
2095 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2096 break;
2097 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2098 break;
2099 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2100 break;
2101 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2102 break;
2103 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2104 break;
2105 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2106 break;
2107 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2108 break;
2109 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2110 break;
2111 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2112 break;
2113 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2114 break;
2115 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2116 break;
2117 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2118 break;
2119 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2120 break;
2121 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2122 break;
2123 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2124 break;
2125 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2126 break;
2127 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2128 break;
2129 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2130 break;
2131 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2132 break;
2133 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2134 break;
2135 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2136 break;
2137 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2138 break;
2139 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2140 break;
2141 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2142 break;
2143 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2144 break;
2145 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2146 break;
2147 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2150 break;
2151 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2152 break;
2153 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2154 break;
2155 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2156 break;
2157 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2158 break;
2159 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2160 break;
2161 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2162 break;
2163 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2164 break;
2165 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2166 break;
2167 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2168 break;
2169 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2170 break;
2171 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2172 break;
2173 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2174 break;
2175 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2176 break;
2177 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2178 break;
2179 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2180 break;
2181 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2182 break;
2183 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2184 break;
2185 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2186 break;
2187 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2188 break;
2189 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2190 break;
2191 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2192 break;
2193 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2194 break;
2195 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2196 break;
2197 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2198 break;
2199 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2200 break;
2201 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2202 break;
2203 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2204 break;
2205 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2206 break;
2207 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2208 break;
2209 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2210 break;
2211 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2212 break;
2213 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2214 break;
2215 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2216 break;
2217 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2218 break;
2219 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2220 break;
2221 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2222 break;
2223 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2224 break;
2225 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2226 break;
2227 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2228 break;
2229 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2230 break;
2231 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2232 break;
2233 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2234 break;
2235 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2236 break;
2237 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2238 break;
2239 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2240 break;
2241 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2242 break;
2243 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2244 break;
2245 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2246 break;
2247 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2248 break;
2249 }
2250
2251 return ppc64_elf_howto_table[r];
2252 };
2253
2254 static reloc_howto_type *
2255 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2256 const char *r_name)
2257 {
2258 unsigned int i;
2259
2260 for (i = 0;
2261 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2262 i++)
2263 if (ppc64_elf_howto_raw[i].name != NULL
2264 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2265 return &ppc64_elf_howto_raw[i];
2266
2267 return NULL;
2268 }
2269
2270 /* Set the howto pointer for a PowerPC ELF reloc. */
2271
2272 static void
2273 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2274 Elf_Internal_Rela *dst)
2275 {
2276 unsigned int type;
2277
2278 /* Initialize howto table if needed. */
2279 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2280 ppc_howto_init ();
2281
2282 type = ELF64_R_TYPE (dst->r_info);
2283 if (type >= (sizeof (ppc64_elf_howto_table)
2284 / sizeof (ppc64_elf_howto_table[0])))
2285 {
2286 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2287 abfd, (int) type);
2288 type = R_PPC64_NONE;
2289 }
2290 cache_ptr->howto = ppc64_elf_howto_table[type];
2291 }
2292
2293 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2294
2295 static bfd_reloc_status_type
2296 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2297 void *data, asection *input_section,
2298 bfd *output_bfd, char **error_message)
2299 {
2300 /* If this is a relocatable link (output_bfd test tells us), just
2301 call the generic function. Any adjustment will be done at final
2302 link time. */
2303 if (output_bfd != NULL)
2304 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2305 input_section, output_bfd, error_message);
2306
2307 /* Adjust the addend for sign extension of the low 16 bits.
2308 We won't actually be using the low 16 bits, so trashing them
2309 doesn't matter. */
2310 reloc_entry->addend += 0x8000;
2311 return bfd_reloc_continue;
2312 }
2313
2314 static bfd_reloc_status_type
2315 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2316 void *data, asection *input_section,
2317 bfd *output_bfd, char **error_message)
2318 {
2319 if (output_bfd != NULL)
2320 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2321 input_section, output_bfd, error_message);
2322
2323 if (strcmp (symbol->section->name, ".opd") == 0
2324 && (symbol->section->owner->flags & DYNAMIC) == 0)
2325 {
2326 bfd_vma dest = opd_entry_value (symbol->section,
2327 symbol->value + reloc_entry->addend,
2328 NULL, NULL);
2329 if (dest != (bfd_vma) -1)
2330 reloc_entry->addend = dest - (symbol->value
2331 + symbol->section->output_section->vma
2332 + symbol->section->output_offset);
2333 }
2334 return bfd_reloc_continue;
2335 }
2336
2337 static bfd_reloc_status_type
2338 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2339 void *data, asection *input_section,
2340 bfd *output_bfd, char **error_message)
2341 {
2342 long insn;
2343 enum elf_ppc64_reloc_type r_type;
2344 bfd_size_type octets;
2345 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2346 bfd_boolean is_power4 = FALSE;
2347
2348 /* If this is a relocatable link (output_bfd test tells us), just
2349 call the generic function. Any adjustment will be done at final
2350 link time. */
2351 if (output_bfd != NULL)
2352 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2353 input_section, output_bfd, error_message);
2354
2355 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2356 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2357 insn &= ~(0x01 << 21);
2358 r_type = reloc_entry->howto->type;
2359 if (r_type == R_PPC64_ADDR14_BRTAKEN
2360 || r_type == R_PPC64_REL14_BRTAKEN)
2361 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2362
2363 if (is_power4)
2364 {
2365 /* Set 'a' bit. This is 0b00010 in BO field for branch
2366 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2367 for branch on CTR insns (BO == 1a00t or 1a01t). */
2368 if ((insn & (0x14 << 21)) == (0x04 << 21))
2369 insn |= 0x02 << 21;
2370 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2371 insn |= 0x08 << 21;
2372 else
2373 goto out;
2374 }
2375 else
2376 {
2377 bfd_vma target = 0;
2378 bfd_vma from;
2379
2380 if (!bfd_is_com_section (symbol->section))
2381 target = symbol->value;
2382 target += symbol->section->output_section->vma;
2383 target += symbol->section->output_offset;
2384 target += reloc_entry->addend;
2385
2386 from = (reloc_entry->address
2387 + input_section->output_offset
2388 + input_section->output_section->vma);
2389
2390 /* Invert 'y' bit if not the default. */
2391 if ((bfd_signed_vma) (target - from) < 0)
2392 insn ^= 0x01 << 21;
2393 }
2394 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2395 out:
2396 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2397 input_section, output_bfd, error_message);
2398 }
2399
2400 static bfd_reloc_status_type
2401 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2402 void *data, asection *input_section,
2403 bfd *output_bfd, char **error_message)
2404 {
2405 /* If this is a relocatable link (output_bfd test tells us), just
2406 call the generic function. Any adjustment will be done at final
2407 link time. */
2408 if (output_bfd != NULL)
2409 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2410 input_section, output_bfd, error_message);
2411
2412 /* Subtract the symbol section base address. */
2413 reloc_entry->addend -= symbol->section->output_section->vma;
2414 return bfd_reloc_continue;
2415 }
2416
2417 static bfd_reloc_status_type
2418 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2419 void *data, asection *input_section,
2420 bfd *output_bfd, char **error_message)
2421 {
2422 /* If this is a relocatable link (output_bfd test tells us), just
2423 call the generic function. Any adjustment will be done at final
2424 link time. */
2425 if (output_bfd != NULL)
2426 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2427 input_section, output_bfd, error_message);
2428
2429 /* Subtract the symbol section base address. */
2430 reloc_entry->addend -= symbol->section->output_section->vma;
2431
2432 /* Adjust the addend for sign extension of the low 16 bits. */
2433 reloc_entry->addend += 0x8000;
2434 return bfd_reloc_continue;
2435 }
2436
2437 static bfd_reloc_status_type
2438 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2439 void *data, asection *input_section,
2440 bfd *output_bfd, char **error_message)
2441 {
2442 bfd_vma TOCstart;
2443
2444 /* If this is a relocatable link (output_bfd test tells us), just
2445 call the generic function. Any adjustment will be done at final
2446 link time. */
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2450
2451 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2452 if (TOCstart == 0)
2453 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2454
2455 /* Subtract the TOC base address. */
2456 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2457 return bfd_reloc_continue;
2458 }
2459
2460 static bfd_reloc_status_type
2461 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2462 void *data, asection *input_section,
2463 bfd *output_bfd, char **error_message)
2464 {
2465 bfd_vma TOCstart;
2466
2467 /* If this is a relocatable link (output_bfd test tells us), just
2468 call the generic function. Any adjustment will be done at final
2469 link time. */
2470 if (output_bfd != NULL)
2471 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2472 input_section, output_bfd, error_message);
2473
2474 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2475 if (TOCstart == 0)
2476 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2477
2478 /* Subtract the TOC base address. */
2479 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2480
2481 /* Adjust the addend for sign extension of the low 16 bits. */
2482 reloc_entry->addend += 0x8000;
2483 return bfd_reloc_continue;
2484 }
2485
2486 static bfd_reloc_status_type
2487 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2488 void *data, asection *input_section,
2489 bfd *output_bfd, char **error_message)
2490 {
2491 bfd_vma TOCstart;
2492 bfd_size_type octets;
2493
2494 /* If this is a relocatable link (output_bfd test tells us), just
2495 call the generic function. Any adjustment will be done at final
2496 link time. */
2497 if (output_bfd != NULL)
2498 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2499 input_section, output_bfd, error_message);
2500
2501 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2502 if (TOCstart == 0)
2503 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2504
2505 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2506 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2507 return bfd_reloc_ok;
2508 }
2509
2510 static bfd_reloc_status_type
2511 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2512 void *data, asection *input_section,
2513 bfd *output_bfd, char **error_message)
2514 {
2515 /* If this is a relocatable link (output_bfd test tells us), just
2516 call the generic function. Any adjustment will be done at final
2517 link time. */
2518 if (output_bfd != NULL)
2519 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2520 input_section, output_bfd, error_message);
2521
2522 if (error_message != NULL)
2523 {
2524 static char buf[60];
2525 sprintf (buf, "generic linker can't handle %s",
2526 reloc_entry->howto->name);
2527 *error_message = buf;
2528 }
2529 return bfd_reloc_dangerous;
2530 }
2531
2532 /* Track GOT entries needed for a given symbol. We might need more
2533 than one got entry per symbol. */
2534 struct got_entry
2535 {
2536 struct got_entry *next;
2537
2538 /* The symbol addend that we'll be placing in the GOT. */
2539 bfd_vma addend;
2540
2541 /* Unlike other ELF targets, we use separate GOT entries for the same
2542 symbol referenced from different input files. This is to support
2543 automatic multiple TOC/GOT sections, where the TOC base can vary
2544 from one input file to another. After partitioning into TOC groups
2545 we merge entries within the group.
2546
2547 Point to the BFD owning this GOT entry. */
2548 bfd *owner;
2549
2550 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2551 TLS_TPREL or TLS_DTPREL for tls entries. */
2552 unsigned char tls_type;
2553
2554 /* Non-zero if got.ent points to real entry. */
2555 unsigned char is_indirect;
2556
2557 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2558 union
2559 {
2560 bfd_signed_vma refcount;
2561 bfd_vma offset;
2562 struct got_entry *ent;
2563 } got;
2564 };
2565
2566 /* The same for PLT. */
2567 struct plt_entry
2568 {
2569 struct plt_entry *next;
2570
2571 bfd_vma addend;
2572
2573 union
2574 {
2575 bfd_signed_vma refcount;
2576 bfd_vma offset;
2577 } plt;
2578 };
2579
2580 struct ppc64_elf_obj_tdata
2581 {
2582 struct elf_obj_tdata elf;
2583
2584 /* Shortcuts to dynamic linker sections. */
2585 asection *got;
2586 asection *relgot;
2587
2588 /* Used during garbage collection. We attach global symbols defined
2589 on removed .opd entries to this section so that the sym is removed. */
2590 asection *deleted_section;
2591
2592 /* TLS local dynamic got entry handling. Support for multiple GOT
2593 sections means we potentially need one of these for each input bfd. */
2594 struct got_entry tlsld_got;
2595
2596 /* A copy of relocs before they are modified for --emit-relocs. */
2597 Elf_Internal_Rela *opd_relocs;
2598
2599 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2600 the reloc to be in the range -32768 to 32767. */
2601 unsigned int has_small_toc_reloc;
2602 };
2603
2604 #define ppc64_elf_tdata(bfd) \
2605 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2606
2607 #define ppc64_tlsld_got(bfd) \
2608 (&ppc64_elf_tdata (bfd)->tlsld_got)
2609
2610 #define is_ppc64_elf(bfd) \
2611 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2612 && elf_object_id (bfd) == PPC64_ELF_DATA)
2613
2614 /* Override the generic function because we store some extras. */
2615
2616 static bfd_boolean
2617 ppc64_elf_mkobject (bfd *abfd)
2618 {
2619 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2620 PPC64_ELF_DATA);
2621 }
2622
2623 /* Fix bad default arch selected for a 64 bit input bfd when the
2624 default is 32 bit. */
2625
2626 static bfd_boolean
2627 ppc64_elf_object_p (bfd *abfd)
2628 {
2629 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2630 {
2631 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2632
2633 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2634 {
2635 /* Relies on arch after 32 bit default being 64 bit default. */
2636 abfd->arch_info = abfd->arch_info->next;
2637 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2638 }
2639 }
2640 return TRUE;
2641 }
2642
2643 /* Support for core dump NOTE sections. */
2644
2645 static bfd_boolean
2646 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2647 {
2648 size_t offset, size;
2649
2650 if (note->descsz != 504)
2651 return FALSE;
2652
2653 /* pr_cursig */
2654 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2655
2656 /* pr_pid */
2657 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2658
2659 /* pr_reg */
2660 offset = 112;
2661 size = 384;
2662
2663 /* Make a ".reg/999" section. */
2664 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2665 size, note->descpos + offset);
2666 }
2667
2668 static bfd_boolean
2669 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2670 {
2671 if (note->descsz != 136)
2672 return FALSE;
2673
2674 elf_tdata (abfd)->core_pid
2675 = bfd_get_32 (abfd, note->descdata + 24);
2676 elf_tdata (abfd)->core_program
2677 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2678 elf_tdata (abfd)->core_command
2679 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2680
2681 return TRUE;
2682 }
2683
2684 static char *
2685 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2686 ...)
2687 {
2688 switch (note_type)
2689 {
2690 default:
2691 return NULL;
2692
2693 case NT_PRPSINFO:
2694 {
2695 char data[136];
2696 va_list ap;
2697
2698 va_start (ap, note_type);
2699 memset (data, 0, 40);
2700 strncpy (data + 40, va_arg (ap, const char *), 16);
2701 strncpy (data + 56, va_arg (ap, const char *), 80);
2702 va_end (ap);
2703 return elfcore_write_note (abfd, buf, bufsiz,
2704 "CORE", note_type, data, sizeof (data));
2705 }
2706
2707 case NT_PRSTATUS:
2708 {
2709 char data[504];
2710 va_list ap;
2711 long pid;
2712 int cursig;
2713 const void *greg;
2714
2715 va_start (ap, note_type);
2716 memset (data, 0, 112);
2717 pid = va_arg (ap, long);
2718 bfd_put_32 (abfd, pid, data + 32);
2719 cursig = va_arg (ap, int);
2720 bfd_put_16 (abfd, cursig, data + 12);
2721 greg = va_arg (ap, const void *);
2722 memcpy (data + 112, greg, 384);
2723 memset (data + 496, 0, 8);
2724 va_end (ap);
2725 return elfcore_write_note (abfd, buf, bufsiz,
2726 "CORE", note_type, data, sizeof (data));
2727 }
2728 }
2729 }
2730
2731 /* Add extra PPC sections. */
2732
2733 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2734 {
2735 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2736 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2737 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2738 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2739 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2740 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2741 { NULL, 0, 0, 0, 0 }
2742 };
2743
2744 enum _ppc64_sec_type {
2745 sec_normal = 0,
2746 sec_opd = 1,
2747 sec_toc = 2
2748 };
2749
2750 struct _ppc64_elf_section_data
2751 {
2752 struct bfd_elf_section_data elf;
2753
2754 union
2755 {
2756 /* An array with one entry for each opd function descriptor. */
2757 struct _opd_sec_data
2758 {
2759 /* Points to the function code section for local opd entries. */
2760 asection **func_sec;
2761
2762 /* After editing .opd, adjust references to opd local syms. */
2763 long *adjust;
2764 } opd;
2765
2766 /* An array for toc sections, indexed by offset/8. */
2767 struct _toc_sec_data
2768 {
2769 /* Specifies the relocation symbol index used at a given toc offset. */
2770 unsigned *symndx;
2771
2772 /* And the relocation addend. */
2773 bfd_vma *add;
2774 } toc;
2775 } u;
2776
2777 enum _ppc64_sec_type sec_type:2;
2778
2779 /* Flag set when small branches are detected. Used to
2780 select suitable defaults for the stub group size. */
2781 unsigned int has_14bit_branch:1;
2782 };
2783
2784 #define ppc64_elf_section_data(sec) \
2785 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2786
2787 static bfd_boolean
2788 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2789 {
2790 if (!sec->used_by_bfd)
2791 {
2792 struct _ppc64_elf_section_data *sdata;
2793 bfd_size_type amt = sizeof (*sdata);
2794
2795 sdata = bfd_zalloc (abfd, amt);
2796 if (sdata == NULL)
2797 return FALSE;
2798 sec->used_by_bfd = sdata;
2799 }
2800
2801 return _bfd_elf_new_section_hook (abfd, sec);
2802 }
2803
2804 static struct _opd_sec_data *
2805 get_opd_info (asection * sec)
2806 {
2807 if (sec != NULL
2808 && ppc64_elf_section_data (sec) != NULL
2809 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2810 return &ppc64_elf_section_data (sec)->u.opd;
2811 return NULL;
2812 }
2813 \f
2814 /* Parameters for the qsort hook. */
2815 static bfd_boolean synthetic_relocatable;
2816
2817 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2818
2819 static int
2820 compare_symbols (const void *ap, const void *bp)
2821 {
2822 const asymbol *a = * (const asymbol **) ap;
2823 const asymbol *b = * (const asymbol **) bp;
2824
2825 /* Section symbols first. */
2826 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2827 return -1;
2828 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2829 return 1;
2830
2831 /* then .opd symbols. */
2832 if (strcmp (a->section->name, ".opd") == 0
2833 && strcmp (b->section->name, ".opd") != 0)
2834 return -1;
2835 if (strcmp (a->section->name, ".opd") != 0
2836 && strcmp (b->section->name, ".opd") == 0)
2837 return 1;
2838
2839 /* then other code symbols. */
2840 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2841 == (SEC_CODE | SEC_ALLOC)
2842 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2843 != (SEC_CODE | SEC_ALLOC))
2844 return -1;
2845
2846 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2847 != (SEC_CODE | SEC_ALLOC)
2848 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2849 == (SEC_CODE | SEC_ALLOC))
2850 return 1;
2851
2852 if (synthetic_relocatable)
2853 {
2854 if (a->section->id < b->section->id)
2855 return -1;
2856
2857 if (a->section->id > b->section->id)
2858 return 1;
2859 }
2860
2861 if (a->value + a->section->vma < b->value + b->section->vma)
2862 return -1;
2863
2864 if (a->value + a->section->vma > b->value + b->section->vma)
2865 return 1;
2866
2867 /* For syms with the same value, prefer strong dynamic global function
2868 syms over other syms. */
2869 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2870 return -1;
2871
2872 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2873 return 1;
2874
2875 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2876 return -1;
2877
2878 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2879 return 1;
2880
2881 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2882 return -1;
2883
2884 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2885 return 1;
2886
2887 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2888 return -1;
2889
2890 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2891 return 1;
2892
2893 return 0;
2894 }
2895
2896 /* Search SYMS for a symbol of the given VALUE. */
2897
2898 static asymbol *
2899 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2900 {
2901 long mid;
2902
2903 if (id == -1)
2904 {
2905 while (lo < hi)
2906 {
2907 mid = (lo + hi) >> 1;
2908 if (syms[mid]->value + syms[mid]->section->vma < value)
2909 lo = mid + 1;
2910 else if (syms[mid]->value + syms[mid]->section->vma > value)
2911 hi = mid;
2912 else
2913 return syms[mid];
2914 }
2915 }
2916 else
2917 {
2918 while (lo < hi)
2919 {
2920 mid = (lo + hi) >> 1;
2921 if (syms[mid]->section->id < id)
2922 lo = mid + 1;
2923 else if (syms[mid]->section->id > id)
2924 hi = mid;
2925 else if (syms[mid]->value < value)
2926 lo = mid + 1;
2927 else if (syms[mid]->value > value)
2928 hi = mid;
2929 else
2930 return syms[mid];
2931 }
2932 }
2933 return NULL;
2934 }
2935
2936 static bfd_boolean
2937 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2938 {
2939 bfd_vma vma = *(bfd_vma *) ptr;
2940 return ((section->flags & SEC_ALLOC) != 0
2941 && section->vma <= vma
2942 && vma < section->vma + section->size);
2943 }
2944
2945 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2946 entry syms. Also generate @plt symbols for the glink branch table. */
2947
2948 static long
2949 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2950 long static_count, asymbol **static_syms,
2951 long dyn_count, asymbol **dyn_syms,
2952 asymbol **ret)
2953 {
2954 asymbol *s;
2955 long i;
2956 long count;
2957 char *names;
2958 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2959 asection *opd;
2960 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2961 asymbol **syms;
2962
2963 *ret = NULL;
2964
2965 opd = bfd_get_section_by_name (abfd, ".opd");
2966 if (opd == NULL)
2967 return 0;
2968
2969 symcount = static_count;
2970 if (!relocatable)
2971 symcount += dyn_count;
2972 if (symcount == 0)
2973 return 0;
2974
2975 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2976 if (syms == NULL)
2977 return -1;
2978
2979 if (!relocatable && static_count != 0 && dyn_count != 0)
2980 {
2981 /* Use both symbol tables. */
2982 memcpy (syms, static_syms, static_count * sizeof (*syms));
2983 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2984 }
2985 else if (!relocatable && static_count == 0)
2986 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2987 else
2988 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2989
2990 synthetic_relocatable = relocatable;
2991 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2992
2993 if (!relocatable && symcount > 1)
2994 {
2995 long j;
2996 /* Trim duplicate syms, since we may have merged the normal and
2997 dynamic symbols. Actually, we only care about syms that have
2998 different values, so trim any with the same value. */
2999 for (i = 1, j = 1; i < symcount; ++i)
3000 if (syms[i - 1]->value + syms[i - 1]->section->vma
3001 != syms[i]->value + syms[i]->section->vma)
3002 syms[j++] = syms[i];
3003 symcount = j;
3004 }
3005
3006 i = 0;
3007 if (strcmp (syms[i]->section->name, ".opd") == 0)
3008 ++i;
3009 codesecsym = i;
3010
3011 for (; i < symcount; ++i)
3012 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3013 != (SEC_CODE | SEC_ALLOC))
3014 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3015 break;
3016 codesecsymend = i;
3017
3018 for (; i < symcount; ++i)
3019 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3020 break;
3021 secsymend = i;
3022
3023 for (; i < symcount; ++i)
3024 if (strcmp (syms[i]->section->name, ".opd") != 0)
3025 break;
3026 opdsymend = i;
3027
3028 for (; i < symcount; ++i)
3029 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3030 != (SEC_CODE | SEC_ALLOC))
3031 break;
3032 symcount = i;
3033
3034 count = 0;
3035
3036 if (relocatable)
3037 {
3038 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3039 arelent *r;
3040 size_t size;
3041 long relcount;
3042
3043 if (opdsymend == secsymend)
3044 goto done;
3045
3046 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3047 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3048 if (relcount == 0)
3049 goto done;
3050
3051 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3052 {
3053 count = -1;
3054 goto done;
3055 }
3056
3057 size = 0;
3058 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3059 {
3060 asymbol *sym;
3061
3062 while (r < opd->relocation + relcount
3063 && r->address < syms[i]->value + opd->vma)
3064 ++r;
3065
3066 if (r == opd->relocation + relcount)
3067 break;
3068
3069 if (r->address != syms[i]->value + opd->vma)
3070 continue;
3071
3072 if (r->howto->type != R_PPC64_ADDR64)
3073 continue;
3074
3075 sym = *r->sym_ptr_ptr;
3076 if (!sym_exists_at (syms, opdsymend, symcount,
3077 sym->section->id, sym->value + r->addend))
3078 {
3079 ++count;
3080 size += sizeof (asymbol);
3081 size += strlen (syms[i]->name) + 2;
3082 }
3083 }
3084
3085 s = *ret = bfd_malloc (size);
3086 if (s == NULL)
3087 {
3088 count = -1;
3089 goto done;
3090 }
3091
3092 names = (char *) (s + count);
3093
3094 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3095 {
3096 asymbol *sym;
3097
3098 while (r < opd->relocation + relcount
3099 && r->address < syms[i]->value + opd->vma)
3100 ++r;
3101
3102 if (r == opd->relocation + relcount)
3103 break;
3104
3105 if (r->address != syms[i]->value + opd->vma)
3106 continue;
3107
3108 if (r->howto->type != R_PPC64_ADDR64)
3109 continue;
3110
3111 sym = *r->sym_ptr_ptr;
3112 if (!sym_exists_at (syms, opdsymend, symcount,
3113 sym->section->id, sym->value + r->addend))
3114 {
3115 size_t len;
3116
3117 *s = *syms[i];
3118 s->flags |= BSF_SYNTHETIC;
3119 s->section = sym->section;
3120 s->value = sym->value + r->addend;
3121 s->name = names;
3122 *names++ = '.';
3123 len = strlen (syms[i]->name);
3124 memcpy (names, syms[i]->name, len + 1);
3125 names += len + 1;
3126 /* Have udata.p point back to the original symbol this
3127 synthetic symbol was derived from. */
3128 s->udata.p = syms[i];
3129 s++;
3130 }
3131 }
3132 }
3133 else
3134 {
3135 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3136 bfd_byte *contents;
3137 size_t size;
3138 long plt_count = 0;
3139 bfd_vma glink_vma = 0, resolv_vma = 0;
3140 asection *dynamic, *glink = NULL, *relplt = NULL;
3141 arelent *p;
3142
3143 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3144 {
3145 if (contents)
3146 {
3147 free_contents_and_exit:
3148 free (contents);
3149 }
3150 count = -1;
3151 goto done;
3152 }
3153
3154 size = 0;
3155 for (i = secsymend; i < opdsymend; ++i)
3156 {
3157 bfd_vma ent;
3158
3159 /* Ignore bogus symbols. */
3160 if (syms[i]->value > opd->size - 8)
3161 continue;
3162
3163 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3164 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3165 {
3166 ++count;
3167 size += sizeof (asymbol);
3168 size += strlen (syms[i]->name) + 2;
3169 }
3170 }
3171
3172 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3173 if (dyn_count != 0
3174 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3175 {
3176 bfd_byte *dynbuf, *extdyn, *extdynend;
3177 size_t extdynsize;
3178 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3179
3180 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3181 goto free_contents_and_exit;
3182
3183 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3184 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3185
3186 extdyn = dynbuf;
3187 extdynend = extdyn + dynamic->size;
3188 for (; extdyn < extdynend; extdyn += extdynsize)
3189 {
3190 Elf_Internal_Dyn dyn;
3191 (*swap_dyn_in) (abfd, extdyn, &dyn);
3192
3193 if (dyn.d_tag == DT_NULL)
3194 break;
3195
3196 if (dyn.d_tag == DT_PPC64_GLINK)
3197 {
3198 /* The first glink stub starts at offset 32; see comment in
3199 ppc64_elf_finish_dynamic_sections. */
3200 glink_vma = dyn.d_un.d_val + 32;
3201 /* The .glink section usually does not survive the final
3202 link; search for the section (usually .text) where the
3203 glink stubs now reside. */
3204 glink = bfd_sections_find_if (abfd, section_covers_vma,
3205 &glink_vma);
3206 break;
3207 }
3208 }
3209
3210 free (dynbuf);
3211 }
3212
3213 if (glink != NULL)
3214 {
3215 /* Determine __glink trampoline by reading the relative branch
3216 from the first glink stub. */
3217 bfd_byte buf[4];
3218 if (bfd_get_section_contents (abfd, glink, buf,
3219 glink_vma + 4 - glink->vma, 4))
3220 {
3221 unsigned int insn = bfd_get_32 (abfd, buf);
3222 insn ^= B_DOT;
3223 if ((insn & ~0x3fffffc) == 0)
3224 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3225 }
3226
3227 if (resolv_vma)
3228 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3229
3230 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3231 if (relplt != NULL)
3232 {
3233 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3234 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3235 goto free_contents_and_exit;
3236
3237 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3238 size += plt_count * sizeof (asymbol);
3239
3240 p = relplt->relocation;
3241 for (i = 0; i < plt_count; i++, p++)
3242 {
3243 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3244 if (p->addend != 0)
3245 size += sizeof ("+0x") - 1 + 16;
3246 }
3247 }
3248 }
3249
3250 s = *ret = bfd_malloc (size);
3251 if (s == NULL)
3252 goto free_contents_and_exit;
3253
3254 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3255
3256 for (i = secsymend; i < opdsymend; ++i)
3257 {
3258 bfd_vma ent;
3259
3260 if (syms[i]->value > opd->size - 8)
3261 continue;
3262
3263 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3264 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3265 {
3266 long lo, hi;
3267 size_t len;
3268 asection *sec = abfd->sections;
3269
3270 *s = *syms[i];
3271 lo = codesecsym;
3272 hi = codesecsymend;
3273 while (lo < hi)
3274 {
3275 long mid = (lo + hi) >> 1;
3276 if (syms[mid]->section->vma < ent)
3277 lo = mid + 1;
3278 else if (syms[mid]->section->vma > ent)
3279 hi = mid;
3280 else
3281 {
3282 sec = syms[mid]->section;
3283 break;
3284 }
3285 }
3286
3287 if (lo >= hi && lo > codesecsym)
3288 sec = syms[lo - 1]->section;
3289
3290 for (; sec != NULL; sec = sec->next)
3291 {
3292 if (sec->vma > ent)
3293 break;
3294 /* SEC_LOAD may not be set if SEC is from a separate debug
3295 info file. */
3296 if ((sec->flags & SEC_ALLOC) == 0)
3297 break;
3298 if ((sec->flags & SEC_CODE) != 0)
3299 s->section = sec;
3300 }
3301 s->flags |= BSF_SYNTHETIC;
3302 s->value = ent - s->section->vma;
3303 s->name = names;
3304 *names++ = '.';
3305 len = strlen (syms[i]->name);
3306 memcpy (names, syms[i]->name, len + 1);
3307 names += len + 1;
3308 /* Have udata.p point back to the original symbol this
3309 synthetic symbol was derived from. */
3310 s->udata.p = syms[i];
3311 s++;
3312 }
3313 }
3314 free (contents);
3315
3316 if (glink != NULL && relplt != NULL)
3317 {
3318 if (resolv_vma)
3319 {
3320 /* Add a symbol for the main glink trampoline. */
3321 memset (s, 0, sizeof *s);
3322 s->the_bfd = abfd;
3323 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3324 s->section = glink;
3325 s->value = resolv_vma - glink->vma;
3326 s->name = names;
3327 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3328 names += sizeof ("__glink_PLTresolve");
3329 s++;
3330 count++;
3331 }
3332
3333 /* FIXME: It would be very much nicer to put sym@plt on the
3334 stub rather than on the glink branch table entry. The
3335 objdump disassembler would then use a sensible symbol
3336 name on plt calls. The difficulty in doing so is
3337 a) finding the stubs, and,
3338 b) matching stubs against plt entries, and,
3339 c) there can be multiple stubs for a given plt entry.
3340
3341 Solving (a) could be done by code scanning, but older
3342 ppc64 binaries used different stubs to current code.
3343 (b) is the tricky one since you need to known the toc
3344 pointer for at least one function that uses a pic stub to
3345 be able to calculate the plt address referenced.
3346 (c) means gdb would need to set multiple breakpoints (or
3347 find the glink branch itself) when setting breakpoints
3348 for pending shared library loads. */
3349 p = relplt->relocation;
3350 for (i = 0; i < plt_count; i++, p++)
3351 {
3352 size_t len;
3353
3354 *s = **p->sym_ptr_ptr;
3355 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3356 we are defining a symbol, ensure one of them is set. */
3357 if ((s->flags & BSF_LOCAL) == 0)
3358 s->flags |= BSF_GLOBAL;
3359 s->flags |= BSF_SYNTHETIC;
3360 s->section = glink;
3361 s->value = glink_vma - glink->vma;
3362 s->name = names;
3363 s->udata.p = NULL;
3364 len = strlen ((*p->sym_ptr_ptr)->name);
3365 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3366 names += len;
3367 if (p->addend != 0)
3368 {
3369 memcpy (names, "+0x", sizeof ("+0x") - 1);
3370 names += sizeof ("+0x") - 1;
3371 bfd_sprintf_vma (abfd, names, p->addend);
3372 names += strlen (names);
3373 }
3374 memcpy (names, "@plt", sizeof ("@plt"));
3375 names += sizeof ("@plt");
3376 s++;
3377 glink_vma += 8;
3378 if (i >= 0x8000)
3379 glink_vma += 4;
3380 }
3381 count += plt_count;
3382 }
3383 }
3384
3385 done:
3386 free (syms);
3387 return count;
3388 }
3389 \f
3390 /* The following functions are specific to the ELF linker, while
3391 functions above are used generally. Those named ppc64_elf_* are
3392 called by the main ELF linker code. They appear in this file more
3393 or less in the order in which they are called. eg.
3394 ppc64_elf_check_relocs is called early in the link process,
3395 ppc64_elf_finish_dynamic_sections is one of the last functions
3396 called.
3397
3398 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3399 functions have both a function code symbol and a function descriptor
3400 symbol. A call to foo in a relocatable object file looks like:
3401
3402 . .text
3403 . x:
3404 . bl .foo
3405 . nop
3406
3407 The function definition in another object file might be:
3408
3409 . .section .opd
3410 . foo: .quad .foo
3411 . .quad .TOC.@tocbase
3412 . .quad 0
3413 .
3414 . .text
3415 . .foo: blr
3416
3417 When the linker resolves the call during a static link, the branch
3418 unsurprisingly just goes to .foo and the .opd information is unused.
3419 If the function definition is in a shared library, things are a little
3420 different: The call goes via a plt call stub, the opd information gets
3421 copied to the plt, and the linker patches the nop.
3422
3423 . x:
3424 . bl .foo_stub
3425 . ld 2,40(1)
3426 .
3427 .
3428 . .foo_stub:
3429 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3430 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3431 . std 2,40(1) # this is the general idea
3432 . ld 11,0(12)
3433 . ld 2,8(12)
3434 . mtctr 11
3435 . ld 11,16(12)
3436 . bctr
3437 .
3438 . .section .plt
3439 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3440
3441 The "reloc ()" notation is supposed to indicate that the linker emits
3442 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3443 copying.
3444
3445 What are the difficulties here? Well, firstly, the relocations
3446 examined by the linker in check_relocs are against the function code
3447 sym .foo, while the dynamic relocation in the plt is emitted against
3448 the function descriptor symbol, foo. Somewhere along the line, we need
3449 to carefully copy dynamic link information from one symbol to the other.
3450 Secondly, the generic part of the elf linker will make .foo a dynamic
3451 symbol as is normal for most other backends. We need foo dynamic
3452 instead, at least for an application final link. However, when
3453 creating a shared library containing foo, we need to have both symbols
3454 dynamic so that references to .foo are satisfied during the early
3455 stages of linking. Otherwise the linker might decide to pull in a
3456 definition from some other object, eg. a static library.
3457
3458 Update: As of August 2004, we support a new convention. Function
3459 calls may use the function descriptor symbol, ie. "bl foo". This
3460 behaves exactly as "bl .foo". */
3461
3462 /* Of those relocs that might be copied as dynamic relocs, this function
3463 selects those that must be copied when linking a shared library,
3464 even when the symbol is local. */
3465
3466 static int
3467 must_be_dyn_reloc (struct bfd_link_info *info,
3468 enum elf_ppc64_reloc_type r_type)
3469 {
3470 switch (r_type)
3471 {
3472 default:
3473 return 1;
3474
3475 case R_PPC64_REL32:
3476 case R_PPC64_REL64:
3477 case R_PPC64_REL30:
3478 return 0;
3479
3480 case R_PPC64_TPREL16:
3481 case R_PPC64_TPREL16_LO:
3482 case R_PPC64_TPREL16_HI:
3483 case R_PPC64_TPREL16_HA:
3484 case R_PPC64_TPREL16_DS:
3485 case R_PPC64_TPREL16_LO_DS:
3486 case R_PPC64_TPREL16_HIGHER:
3487 case R_PPC64_TPREL16_HIGHERA:
3488 case R_PPC64_TPREL16_HIGHEST:
3489 case R_PPC64_TPREL16_HIGHESTA:
3490 case R_PPC64_TPREL64:
3491 return !info->executable;
3492 }
3493 }
3494
3495 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3496 copying dynamic variables from a shared lib into an app's dynbss
3497 section, and instead use a dynamic relocation to point into the
3498 shared lib. With code that gcc generates, it's vital that this be
3499 enabled; In the PowerPC64 ABI, the address of a function is actually
3500 the address of a function descriptor, which resides in the .opd
3501 section. gcc uses the descriptor directly rather than going via the
3502 GOT as some other ABI's do, which means that initialized function
3503 pointers must reference the descriptor. Thus, a function pointer
3504 initialized to the address of a function in a shared library will
3505 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3506 redefines the function descriptor symbol to point to the copy. This
3507 presents a problem as a plt entry for that function is also
3508 initialized from the function descriptor symbol and the copy reloc
3509 may not be initialized first. */
3510 #define ELIMINATE_COPY_RELOCS 1
3511
3512 /* Section name for stubs is the associated section name plus this
3513 string. */
3514 #define STUB_SUFFIX ".stub"
3515
3516 /* Linker stubs.
3517 ppc_stub_long_branch:
3518 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3519 destination, but a 24 bit branch in a stub section will reach.
3520 . b dest
3521
3522 ppc_stub_plt_branch:
3523 Similar to the above, but a 24 bit branch in the stub section won't
3524 reach its destination.
3525 . addis %r12,%r2,xxx@toc@ha
3526 . ld %r11,xxx@toc@l(%r12)
3527 . mtctr %r11
3528 . bctr
3529
3530 ppc_stub_plt_call:
3531 Used to call a function in a shared library. If it so happens that
3532 the plt entry referenced crosses a 64k boundary, then an extra
3533 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3534 . addis %r12,%r2,xxx@toc@ha
3535 . std %r2,40(%r1)
3536 . ld %r11,xxx+0@toc@l(%r12)
3537 . mtctr %r11
3538 . ld %r2,xxx+8@toc@l(%r12)
3539 . ld %r11,xxx+16@toc@l(%r12)
3540 . bctr
3541
3542 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3543 code to adjust the value and save r2 to support multiple toc sections.
3544 A ppc_stub_long_branch with an r2 offset looks like:
3545 . std %r2,40(%r1)
3546 . addis %r2,%r2,off@ha
3547 . addi %r2,%r2,off@l
3548 . b dest
3549
3550 A ppc_stub_plt_branch with an r2 offset looks like:
3551 . std %r2,40(%r1)
3552 . addis %r12,%r2,xxx@toc@ha
3553 . ld %r11,xxx@toc@l(%r12)
3554 . addis %r2,%r2,off@ha
3555 . addi %r2,%r2,off@l
3556 . mtctr %r11
3557 . bctr
3558
3559 In cases where the "addis" instruction would add zero, the "addis" is
3560 omitted and following instructions modified slightly in some cases.
3561 */
3562
3563 enum ppc_stub_type {
3564 ppc_stub_none,
3565 ppc_stub_long_branch,
3566 ppc_stub_long_branch_r2off,
3567 ppc_stub_plt_branch,
3568 ppc_stub_plt_branch_r2off,
3569 ppc_stub_plt_call
3570 };
3571
3572 struct ppc_stub_hash_entry {
3573
3574 /* Base hash table entry structure. */
3575 struct bfd_hash_entry root;
3576
3577 enum ppc_stub_type stub_type;
3578
3579 /* The stub section. */
3580 asection *stub_sec;
3581
3582 /* Offset within stub_sec of the beginning of this stub. */
3583 bfd_vma stub_offset;
3584
3585 /* Given the symbol's value and its section we can determine its final
3586 value when building the stubs (so the stub knows where to jump. */
3587 bfd_vma target_value;
3588 asection *target_section;
3589
3590 /* The symbol table entry, if any, that this was derived from. */
3591 struct ppc_link_hash_entry *h;
3592 struct plt_entry *plt_ent;
3593
3594 /* And the reloc addend that this was derived from. */
3595 bfd_vma addend;
3596
3597 /* Where this stub is being called from, or, in the case of combined
3598 stub sections, the first input section in the group. */
3599 asection *id_sec;
3600 };
3601
3602 struct ppc_branch_hash_entry {
3603
3604 /* Base hash table entry structure. */
3605 struct bfd_hash_entry root;
3606
3607 /* Offset within branch lookup table. */
3608 unsigned int offset;
3609
3610 /* Generation marker. */
3611 unsigned int iter;
3612 };
3613
3614 struct ppc_link_hash_entry
3615 {
3616 struct elf_link_hash_entry elf;
3617
3618 union {
3619 /* A pointer to the most recently used stub hash entry against this
3620 symbol. */
3621 struct ppc_stub_hash_entry *stub_cache;
3622
3623 /* A pointer to the next symbol starting with a '.' */
3624 struct ppc_link_hash_entry *next_dot_sym;
3625 } u;
3626
3627 /* Track dynamic relocs copied for this symbol. */
3628 struct elf_dyn_relocs *dyn_relocs;
3629
3630 /* Link between function code and descriptor symbols. */
3631 struct ppc_link_hash_entry *oh;
3632
3633 /* Flag function code and descriptor symbols. */
3634 unsigned int is_func:1;
3635 unsigned int is_func_descriptor:1;
3636 unsigned int fake:1;
3637
3638 /* Whether global opd/toc sym has been adjusted or not.
3639 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3640 should be set for all globals defined in any opd/toc section. */
3641 unsigned int adjust_done:1;
3642
3643 /* Set if we twiddled this symbol to weak at some stage. */
3644 unsigned int was_undefined:1;
3645
3646 /* Contexts in which symbol is used in the GOT (or TOC).
3647 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3648 corresponding relocs are encountered during check_relocs.
3649 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3650 indicate the corresponding GOT entry type is not needed.
3651 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3652 a TPREL one. We use a separate flag rather than setting TPREL
3653 just for convenience in distinguishing the two cases. */
3654 #define TLS_GD 1 /* GD reloc. */
3655 #define TLS_LD 2 /* LD reloc. */
3656 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3657 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3658 #define TLS_TLS 16 /* Any TLS reloc. */
3659 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3660 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3661 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3662 unsigned char tls_mask;
3663 };
3664
3665 /* ppc64 ELF linker hash table. */
3666
3667 struct ppc_link_hash_table
3668 {
3669 struct elf_link_hash_table elf;
3670
3671 /* The stub hash table. */
3672 struct bfd_hash_table stub_hash_table;
3673
3674 /* Another hash table for plt_branch stubs. */
3675 struct bfd_hash_table branch_hash_table;
3676
3677 /* Linker stub bfd. */
3678 bfd *stub_bfd;
3679
3680 /* Linker call-backs. */
3681 asection * (*add_stub_section) (const char *, asection *);
3682 void (*layout_sections_again) (void);
3683
3684 /* Array to keep track of which stub sections have been created, and
3685 information on stub grouping. */
3686 struct map_stub {
3687 /* This is the section to which stubs in the group will be attached. */
3688 asection *link_sec;
3689 /* The stub section. */
3690 asection *stub_sec;
3691 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3692 bfd_vma toc_off;
3693 } *stub_group;
3694
3695 /* Temp used when calculating TOC pointers. */
3696 bfd_vma toc_curr;
3697 bfd *toc_bfd;
3698 asection *toc_first_sec;
3699
3700 /* Highest input section id. */
3701 int top_id;
3702
3703 /* Highest output section index. */
3704 int top_index;
3705
3706 /* Used when adding symbols. */
3707 struct ppc_link_hash_entry *dot_syms;
3708
3709 /* List of input sections for each output section. */
3710 asection **input_list;
3711
3712 /* Short-cuts to get to dynamic linker sections. */
3713 asection *got;
3714 asection *plt;
3715 asection *relplt;
3716 asection *iplt;
3717 asection *reliplt;
3718 asection *dynbss;
3719 asection *relbss;
3720 asection *glink;
3721 asection *sfpr;
3722 asection *brlt;
3723 asection *relbrlt;
3724 asection *glink_eh_frame;
3725
3726 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3727 struct ppc_link_hash_entry *tls_get_addr;
3728 struct ppc_link_hash_entry *tls_get_addr_fd;
3729
3730 /* The size of reliplt used by got entry relocs. */
3731 bfd_size_type got_reli_size;
3732
3733 /* Statistics. */
3734 unsigned long stub_count[ppc_stub_plt_call];
3735
3736 /* Number of stubs against global syms. */
3737 unsigned long stub_globals;
3738
3739 /* Set if PLT call stubs should load r11. */
3740 unsigned int plt_static_chain:1;
3741
3742 /* Set if we should emit symbols for stubs. */
3743 unsigned int emit_stub_syms:1;
3744
3745 /* Set if __tls_get_addr optimization should not be done. */
3746 unsigned int no_tls_get_addr_opt:1;
3747
3748 /* Support for multiple toc sections. */
3749 unsigned int do_multi_toc:1;
3750 unsigned int multi_toc_needed:1;
3751 unsigned int second_toc_pass:1;
3752 unsigned int do_toc_opt:1;
3753
3754 /* Set on error. */
3755 unsigned int stub_error:1;
3756
3757 /* Temp used by ppc64_elf_process_dot_syms. */
3758 unsigned int twiddled_syms:1;
3759
3760 /* Incremented every time we size stubs. */
3761 unsigned int stub_iteration;
3762
3763 /* Small local sym cache. */
3764 struct sym_cache sym_cache;
3765 };
3766
3767 /* Rename some of the generic section flags to better document how they
3768 are used here. */
3769
3770 /* Nonzero if this section has TLS related relocations. */
3771 #define has_tls_reloc sec_flg0
3772
3773 /* Nonzero if this section has a call to __tls_get_addr. */
3774 #define has_tls_get_addr_call sec_flg1
3775
3776 /* Nonzero if this section has any toc or got relocs. */
3777 #define has_toc_reloc sec_flg2
3778
3779 /* Nonzero if this section has a call to another section that uses
3780 the toc or got. */
3781 #define makes_toc_func_call sec_flg3
3782
3783 /* Recursion protection when determining above flag. */
3784 #define call_check_in_progress sec_flg4
3785 #define call_check_done sec_flg5
3786
3787 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3788
3789 #define ppc_hash_table(p) \
3790 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3791 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3792
3793 #define ppc_stub_hash_lookup(table, string, create, copy) \
3794 ((struct ppc_stub_hash_entry *) \
3795 bfd_hash_lookup ((table), (string), (create), (copy)))
3796
3797 #define ppc_branch_hash_lookup(table, string, create, copy) \
3798 ((struct ppc_branch_hash_entry *) \
3799 bfd_hash_lookup ((table), (string), (create), (copy)))
3800
3801 /* Create an entry in the stub hash table. */
3802
3803 static struct bfd_hash_entry *
3804 stub_hash_newfunc (struct bfd_hash_entry *entry,
3805 struct bfd_hash_table *table,
3806 const char *string)
3807 {
3808 /* Allocate the structure if it has not already been allocated by a
3809 subclass. */
3810 if (entry == NULL)
3811 {
3812 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3813 if (entry == NULL)
3814 return entry;
3815 }
3816
3817 /* Call the allocation method of the superclass. */
3818 entry = bfd_hash_newfunc (entry, table, string);
3819 if (entry != NULL)
3820 {
3821 struct ppc_stub_hash_entry *eh;
3822
3823 /* Initialize the local fields. */
3824 eh = (struct ppc_stub_hash_entry *) entry;
3825 eh->stub_type = ppc_stub_none;
3826 eh->stub_sec = NULL;
3827 eh->stub_offset = 0;
3828 eh->target_value = 0;
3829 eh->target_section = NULL;
3830 eh->h = NULL;
3831 eh->id_sec = NULL;
3832 }
3833
3834 return entry;
3835 }
3836
3837 /* Create an entry in the branch hash table. */
3838
3839 static struct bfd_hash_entry *
3840 branch_hash_newfunc (struct bfd_hash_entry *entry,
3841 struct bfd_hash_table *table,
3842 const char *string)
3843 {
3844 /* Allocate the structure if it has not already been allocated by a
3845 subclass. */
3846 if (entry == NULL)
3847 {
3848 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3849 if (entry == NULL)
3850 return entry;
3851 }
3852
3853 /* Call the allocation method of the superclass. */
3854 entry = bfd_hash_newfunc (entry, table, string);
3855 if (entry != NULL)
3856 {
3857 struct ppc_branch_hash_entry *eh;
3858
3859 /* Initialize the local fields. */
3860 eh = (struct ppc_branch_hash_entry *) entry;
3861 eh->offset = 0;
3862 eh->iter = 0;
3863 }
3864
3865 return entry;
3866 }
3867
3868 /* Create an entry in a ppc64 ELF linker hash table. */
3869
3870 static struct bfd_hash_entry *
3871 link_hash_newfunc (struct bfd_hash_entry *entry,
3872 struct bfd_hash_table *table,
3873 const char *string)
3874 {
3875 /* Allocate the structure if it has not already been allocated by a
3876 subclass. */
3877 if (entry == NULL)
3878 {
3879 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3880 if (entry == NULL)
3881 return entry;
3882 }
3883
3884 /* Call the allocation method of the superclass. */
3885 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3886 if (entry != NULL)
3887 {
3888 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3889
3890 memset (&eh->u.stub_cache, 0,
3891 (sizeof (struct ppc_link_hash_entry)
3892 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3893
3894 /* When making function calls, old ABI code references function entry
3895 points (dot symbols), while new ABI code references the function
3896 descriptor symbol. We need to make any combination of reference and
3897 definition work together, without breaking archive linking.
3898
3899 For a defined function "foo" and an undefined call to "bar":
3900 An old object defines "foo" and ".foo", references ".bar" (possibly
3901 "bar" too).
3902 A new object defines "foo" and references "bar".
3903
3904 A new object thus has no problem with its undefined symbols being
3905 satisfied by definitions in an old object. On the other hand, the
3906 old object won't have ".bar" satisfied by a new object.
3907
3908 Keep a list of newly added dot-symbols. */
3909
3910 if (string[0] == '.')
3911 {
3912 struct ppc_link_hash_table *htab;
3913
3914 htab = (struct ppc_link_hash_table *) table;
3915 eh->u.next_dot_sym = htab->dot_syms;
3916 htab->dot_syms = eh;
3917 }
3918 }
3919
3920 return entry;
3921 }
3922
3923 /* Create a ppc64 ELF linker hash table. */
3924
3925 static struct bfd_link_hash_table *
3926 ppc64_elf_link_hash_table_create (bfd *abfd)
3927 {
3928 struct ppc_link_hash_table *htab;
3929 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3930
3931 htab = bfd_zmalloc (amt);
3932 if (htab == NULL)
3933 return NULL;
3934
3935 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3936 sizeof (struct ppc_link_hash_entry),
3937 PPC64_ELF_DATA))
3938 {
3939 free (htab);
3940 return NULL;
3941 }
3942
3943 /* Init the stub hash table too. */
3944 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3945 sizeof (struct ppc_stub_hash_entry)))
3946 return NULL;
3947
3948 /* And the branch hash table. */
3949 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3950 sizeof (struct ppc_branch_hash_entry)))
3951 return NULL;
3952
3953 /* Initializing two fields of the union is just cosmetic. We really
3954 only care about glist, but when compiled on a 32-bit host the
3955 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3956 debugger inspection of these fields look nicer. */
3957 htab->elf.init_got_refcount.refcount = 0;
3958 htab->elf.init_got_refcount.glist = NULL;
3959 htab->elf.init_plt_refcount.refcount = 0;
3960 htab->elf.init_plt_refcount.glist = NULL;
3961 htab->elf.init_got_offset.offset = 0;
3962 htab->elf.init_got_offset.glist = NULL;
3963 htab->elf.init_plt_offset.offset = 0;
3964 htab->elf.init_plt_offset.glist = NULL;
3965
3966 return &htab->elf.root;
3967 }
3968
3969 /* Free the derived linker hash table. */
3970
3971 static void
3972 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3973 {
3974 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3975
3976 bfd_hash_table_free (&ret->stub_hash_table);
3977 bfd_hash_table_free (&ret->branch_hash_table);
3978 _bfd_generic_link_hash_table_free (hash);
3979 }
3980
3981 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3982
3983 void
3984 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3985 {
3986 struct ppc_link_hash_table *htab;
3987
3988 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3989
3990 /* Always hook our dynamic sections into the first bfd, which is the
3991 linker created stub bfd. This ensures that the GOT header is at
3992 the start of the output TOC section. */
3993 htab = ppc_hash_table (info);
3994 if (htab == NULL)
3995 return;
3996 htab->stub_bfd = abfd;
3997 htab->elf.dynobj = abfd;
3998 }
3999
4000 /* Build a name for an entry in the stub hash table. */
4001
4002 static char *
4003 ppc_stub_name (const asection *input_section,
4004 const asection *sym_sec,
4005 const struct ppc_link_hash_entry *h,
4006 const Elf_Internal_Rela *rel)
4007 {
4008 char *stub_name;
4009 bfd_size_type len;
4010
4011 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4012 offsets from a sym as a branch target? In fact, we could
4013 probably assume the addend is always zero. */
4014 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4015
4016 if (h)
4017 {
4018 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4019 stub_name = bfd_malloc (len);
4020 if (stub_name == NULL)
4021 return stub_name;
4022
4023 sprintf (stub_name, "%08x.%s+%x",
4024 input_section->id & 0xffffffff,
4025 h->elf.root.root.string,
4026 (int) rel->r_addend & 0xffffffff);
4027 }
4028 else
4029 {
4030 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4031 stub_name = bfd_malloc (len);
4032 if (stub_name == NULL)
4033 return stub_name;
4034
4035 sprintf (stub_name, "%08x.%x:%x+%x",
4036 input_section->id & 0xffffffff,
4037 sym_sec->id & 0xffffffff,
4038 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4039 (int) rel->r_addend & 0xffffffff);
4040 }
4041 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4042 stub_name[len - 2] = 0;
4043 return stub_name;
4044 }
4045
4046 /* Look up an entry in the stub hash. Stub entries are cached because
4047 creating the stub name takes a bit of time. */
4048
4049 static struct ppc_stub_hash_entry *
4050 ppc_get_stub_entry (const asection *input_section,
4051 const asection *sym_sec,
4052 struct ppc_link_hash_entry *h,
4053 const Elf_Internal_Rela *rel,
4054 struct ppc_link_hash_table *htab)
4055 {
4056 struct ppc_stub_hash_entry *stub_entry;
4057 const asection *id_sec;
4058
4059 /* If this input section is part of a group of sections sharing one
4060 stub section, then use the id of the first section in the group.
4061 Stub names need to include a section id, as there may well be
4062 more than one stub used to reach say, printf, and we need to
4063 distinguish between them. */
4064 id_sec = htab->stub_group[input_section->id].link_sec;
4065
4066 if (h != NULL && h->u.stub_cache != NULL
4067 && h->u.stub_cache->h == h
4068 && h->u.stub_cache->id_sec == id_sec)
4069 {
4070 stub_entry = h->u.stub_cache;
4071 }
4072 else
4073 {
4074 char *stub_name;
4075
4076 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4077 if (stub_name == NULL)
4078 return NULL;
4079
4080 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4081 stub_name, FALSE, FALSE);
4082 if (h != NULL)
4083 h->u.stub_cache = stub_entry;
4084
4085 free (stub_name);
4086 }
4087
4088 return stub_entry;
4089 }
4090
4091 /* Add a new stub entry to the stub hash. Not all fields of the new
4092 stub entry are initialised. */
4093
4094 static struct ppc_stub_hash_entry *
4095 ppc_add_stub (const char *stub_name,
4096 asection *section,
4097 struct bfd_link_info *info)
4098 {
4099 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4100 asection *link_sec;
4101 asection *stub_sec;
4102 struct ppc_stub_hash_entry *stub_entry;
4103
4104 link_sec = htab->stub_group[section->id].link_sec;
4105 stub_sec = htab->stub_group[section->id].stub_sec;
4106 if (stub_sec == NULL)
4107 {
4108 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4109 if (stub_sec == NULL)
4110 {
4111 size_t namelen;
4112 bfd_size_type len;
4113 char *s_name;
4114
4115 namelen = strlen (link_sec->name);
4116 len = namelen + sizeof (STUB_SUFFIX);
4117 s_name = bfd_alloc (htab->stub_bfd, len);
4118 if (s_name == NULL)
4119 return NULL;
4120
4121 memcpy (s_name, link_sec->name, namelen);
4122 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4123 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4124 if (stub_sec == NULL)
4125 return NULL;
4126 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4127 }
4128 htab->stub_group[section->id].stub_sec = stub_sec;
4129 }
4130
4131 /* Enter this entry into the linker stub hash table. */
4132 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4133 TRUE, FALSE);
4134 if (stub_entry == NULL)
4135 {
4136 info->callbacks->einfo (_("%B: cannot create stub entry %s\n"),
4137 section->owner, stub_name);
4138 return NULL;
4139 }
4140
4141 stub_entry->stub_sec = stub_sec;
4142 stub_entry->stub_offset = 0;
4143 stub_entry->id_sec = link_sec;
4144 return stub_entry;
4145 }
4146
4147 /* Create sections for linker generated code. */
4148
4149 static bfd_boolean
4150 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4151 {
4152 struct ppc_link_hash_table *htab;
4153 flagword flags;
4154
4155 htab = ppc_hash_table (info);
4156 if (htab == NULL)
4157 return FALSE;
4158
4159 /* Create .sfpr for code to save and restore fp regs. */
4160 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4161 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4162 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4163 flags);
4164 if (htab->sfpr == NULL
4165 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4166 return FALSE;
4167
4168 /* Create .glink for lazy dynamic linking support. */
4169 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4170 flags);
4171 if (htab->glink == NULL
4172 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4173 return FALSE;
4174
4175 if (!info->no_ld_generated_unwind_info)
4176 {
4177 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4178 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4179 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4180 ".eh_frame",
4181 flags);
4182 if (htab->glink_eh_frame == NULL
4183 || !bfd_set_section_alignment (abfd, htab->glink_eh_frame, 2))
4184 return FALSE;
4185 }
4186
4187 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4188 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4189 if (htab->iplt == NULL
4190 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4191 return FALSE;
4192
4193 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4194 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4195 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4196 ".rela.iplt",
4197 flags);
4198 if (htab->reliplt == NULL
4199 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4200 return FALSE;
4201
4202 /* Create branch lookup table for plt_branch stubs. */
4203 flags = (SEC_ALLOC | SEC_LOAD
4204 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4205 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4206 flags);
4207 if (htab->brlt == NULL
4208 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4209 return FALSE;
4210
4211 if (!info->shared)
4212 return TRUE;
4213
4214 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4215 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4216 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4217 ".rela.branch_lt",
4218 flags);
4219 if (htab->relbrlt == NULL
4220 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4221 return FALSE;
4222
4223 return TRUE;
4224 }
4225
4226 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4227 not already done. */
4228
4229 static bfd_boolean
4230 create_got_section (bfd *abfd, struct bfd_link_info *info)
4231 {
4232 asection *got, *relgot;
4233 flagword flags;
4234 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4235
4236 if (!is_ppc64_elf (abfd))
4237 return FALSE;
4238 if (htab == NULL)
4239 return FALSE;
4240
4241 if (!htab->got)
4242 {
4243 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4244 return FALSE;
4245
4246 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4247 if (!htab->got)
4248 abort ();
4249 }
4250
4251 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4252 | SEC_LINKER_CREATED);
4253
4254 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4255 if (!got
4256 || !bfd_set_section_alignment (abfd, got, 3))
4257 return FALSE;
4258
4259 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4260 flags | SEC_READONLY);
4261 if (!relgot
4262 || ! bfd_set_section_alignment (abfd, relgot, 3))
4263 return FALSE;
4264
4265 ppc64_elf_tdata (abfd)->got = got;
4266 ppc64_elf_tdata (abfd)->relgot = relgot;
4267 return TRUE;
4268 }
4269
4270 /* Create the dynamic sections, and set up shortcuts. */
4271
4272 static bfd_boolean
4273 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4274 {
4275 struct ppc_link_hash_table *htab;
4276
4277 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4278 return FALSE;
4279
4280 htab = ppc_hash_table (info);
4281 if (htab == NULL)
4282 return FALSE;
4283
4284 if (!htab->got)
4285 htab->got = bfd_get_section_by_name (dynobj, ".got");
4286 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4287 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4288 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4289 if (!info->shared)
4290 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4291
4292 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4293 || (!info->shared && !htab->relbss))
4294 abort ();
4295
4296 return TRUE;
4297 }
4298
4299 /* Follow indirect and warning symbol links. */
4300
4301 static inline struct bfd_link_hash_entry *
4302 follow_link (struct bfd_link_hash_entry *h)
4303 {
4304 while (h->type == bfd_link_hash_indirect
4305 || h->type == bfd_link_hash_warning)
4306 h = h->u.i.link;
4307 return h;
4308 }
4309
4310 static inline struct elf_link_hash_entry *
4311 elf_follow_link (struct elf_link_hash_entry *h)
4312 {
4313 return (struct elf_link_hash_entry *) follow_link (&h->root);
4314 }
4315
4316 static inline struct ppc_link_hash_entry *
4317 ppc_follow_link (struct ppc_link_hash_entry *h)
4318 {
4319 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4320 }
4321
4322 /* Merge PLT info on FROM with that on TO. */
4323
4324 static void
4325 move_plt_plist (struct ppc_link_hash_entry *from,
4326 struct ppc_link_hash_entry *to)
4327 {
4328 if (from->elf.plt.plist != NULL)
4329 {
4330 if (to->elf.plt.plist != NULL)
4331 {
4332 struct plt_entry **entp;
4333 struct plt_entry *ent;
4334
4335 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4336 {
4337 struct plt_entry *dent;
4338
4339 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4340 if (dent->addend == ent->addend)
4341 {
4342 dent->plt.refcount += ent->plt.refcount;
4343 *entp = ent->next;
4344 break;
4345 }
4346 if (dent == NULL)
4347 entp = &ent->next;
4348 }
4349 *entp = to->elf.plt.plist;
4350 }
4351
4352 to->elf.plt.plist = from->elf.plt.plist;
4353 from->elf.plt.plist = NULL;
4354 }
4355 }
4356
4357 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4358
4359 static void
4360 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4361 struct elf_link_hash_entry *dir,
4362 struct elf_link_hash_entry *ind)
4363 {
4364 struct ppc_link_hash_entry *edir, *eind;
4365
4366 edir = (struct ppc_link_hash_entry *) dir;
4367 eind = (struct ppc_link_hash_entry *) ind;
4368
4369 edir->is_func |= eind->is_func;
4370 edir->is_func_descriptor |= eind->is_func_descriptor;
4371 edir->tls_mask |= eind->tls_mask;
4372 if (eind->oh != NULL)
4373 edir->oh = ppc_follow_link (eind->oh);
4374
4375 /* If called to transfer flags for a weakdef during processing
4376 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4377 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4378 if (!(ELIMINATE_COPY_RELOCS
4379 && eind->elf.root.type != bfd_link_hash_indirect
4380 && edir->elf.dynamic_adjusted))
4381 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4382
4383 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4384 edir->elf.ref_regular |= eind->elf.ref_regular;
4385 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4386 edir->elf.needs_plt |= eind->elf.needs_plt;
4387
4388 /* If we were called to copy over info for a weak sym, that's all. */
4389 if (eind->elf.root.type != bfd_link_hash_indirect)
4390 return;
4391
4392 /* Copy over any dynamic relocs we may have on the indirect sym. */
4393 if (eind->dyn_relocs != NULL)
4394 {
4395 if (edir->dyn_relocs != NULL)
4396 {
4397 struct elf_dyn_relocs **pp;
4398 struct elf_dyn_relocs *p;
4399
4400 /* Add reloc counts against the indirect sym to the direct sym
4401 list. Merge any entries against the same section. */
4402 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4403 {
4404 struct elf_dyn_relocs *q;
4405
4406 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4407 if (q->sec == p->sec)
4408 {
4409 q->pc_count += p->pc_count;
4410 q->count += p->count;
4411 *pp = p->next;
4412 break;
4413 }
4414 if (q == NULL)
4415 pp = &p->next;
4416 }
4417 *pp = edir->dyn_relocs;
4418 }
4419
4420 edir->dyn_relocs = eind->dyn_relocs;
4421 eind->dyn_relocs = NULL;
4422 }
4423
4424 /* Copy over got entries that we may have already seen to the
4425 symbol which just became indirect. */
4426 if (eind->elf.got.glist != NULL)
4427 {
4428 if (edir->elf.got.glist != NULL)
4429 {
4430 struct got_entry **entp;
4431 struct got_entry *ent;
4432
4433 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4434 {
4435 struct got_entry *dent;
4436
4437 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4438 if (dent->addend == ent->addend
4439 && dent->owner == ent->owner
4440 && dent->tls_type == ent->tls_type)
4441 {
4442 dent->got.refcount += ent->got.refcount;
4443 *entp = ent->next;
4444 break;
4445 }
4446 if (dent == NULL)
4447 entp = &ent->next;
4448 }
4449 *entp = edir->elf.got.glist;
4450 }
4451
4452 edir->elf.got.glist = eind->elf.got.glist;
4453 eind->elf.got.glist = NULL;
4454 }
4455
4456 /* And plt entries. */
4457 move_plt_plist (eind, edir);
4458
4459 if (eind->elf.dynindx != -1)
4460 {
4461 if (edir->elf.dynindx != -1)
4462 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4463 edir->elf.dynstr_index);
4464 edir->elf.dynindx = eind->elf.dynindx;
4465 edir->elf.dynstr_index = eind->elf.dynstr_index;
4466 eind->elf.dynindx = -1;
4467 eind->elf.dynstr_index = 0;
4468 }
4469 }
4470
4471 /* Find the function descriptor hash entry from the given function code
4472 hash entry FH. Link the entries via their OH fields. */
4473
4474 static struct ppc_link_hash_entry *
4475 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4476 {
4477 struct ppc_link_hash_entry *fdh = fh->oh;
4478
4479 if (fdh == NULL)
4480 {
4481 const char *fd_name = fh->elf.root.root.string + 1;
4482
4483 fdh = (struct ppc_link_hash_entry *)
4484 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4485 if (fdh == NULL)
4486 return fdh;
4487
4488 fdh->is_func_descriptor = 1;
4489 fdh->oh = fh;
4490 fh->is_func = 1;
4491 fh->oh = fdh;
4492 }
4493
4494 return ppc_follow_link (fdh);
4495 }
4496
4497 /* Make a fake function descriptor sym for the code sym FH. */
4498
4499 static struct ppc_link_hash_entry *
4500 make_fdh (struct bfd_link_info *info,
4501 struct ppc_link_hash_entry *fh)
4502 {
4503 bfd *abfd;
4504 asymbol *newsym;
4505 struct bfd_link_hash_entry *bh;
4506 struct ppc_link_hash_entry *fdh;
4507
4508 abfd = fh->elf.root.u.undef.abfd;
4509 newsym = bfd_make_empty_symbol (abfd);
4510 newsym->name = fh->elf.root.root.string + 1;
4511 newsym->section = bfd_und_section_ptr;
4512 newsym->value = 0;
4513 newsym->flags = BSF_WEAK;
4514
4515 bh = NULL;
4516 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4517 newsym->flags, newsym->section,
4518 newsym->value, NULL, FALSE, FALSE,
4519 &bh))
4520 return NULL;
4521
4522 fdh = (struct ppc_link_hash_entry *) bh;
4523 fdh->elf.non_elf = 0;
4524 fdh->fake = 1;
4525 fdh->is_func_descriptor = 1;
4526 fdh->oh = fh;
4527 fh->is_func = 1;
4528 fh->oh = fdh;
4529 return fdh;
4530 }
4531
4532 /* Fix function descriptor symbols defined in .opd sections to be
4533 function type. */
4534
4535 static bfd_boolean
4536 ppc64_elf_add_symbol_hook (bfd *ibfd,
4537 struct bfd_link_info *info,
4538 Elf_Internal_Sym *isym,
4539 const char **name ATTRIBUTE_UNUSED,
4540 flagword *flags ATTRIBUTE_UNUSED,
4541 asection **sec,
4542 bfd_vma *value ATTRIBUTE_UNUSED)
4543 {
4544 if ((ibfd->flags & DYNAMIC) == 0
4545 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4546 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4547
4548 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4549 {
4550 if ((ibfd->flags & DYNAMIC) == 0)
4551 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4552 }
4553 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4554 ;
4555 else if (*sec != NULL
4556 && strcmp ((*sec)->name, ".opd") == 0)
4557 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4558
4559 return TRUE;
4560 }
4561
4562 /* This function makes an old ABI object reference to ".bar" cause the
4563 inclusion of a new ABI object archive that defines "bar".
4564 NAME is a symbol defined in an archive. Return a symbol in the hash
4565 table that might be satisfied by the archive symbols. */
4566
4567 static struct elf_link_hash_entry *
4568 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4569 struct bfd_link_info *info,
4570 const char *name)
4571 {
4572 struct elf_link_hash_entry *h;
4573 char *dot_name;
4574 size_t len;
4575
4576 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4577 if (h != NULL
4578 /* Don't return this sym if it is a fake function descriptor
4579 created by add_symbol_adjust. */
4580 && !(h->root.type == bfd_link_hash_undefweak
4581 && ((struct ppc_link_hash_entry *) h)->fake))
4582 return h;
4583
4584 if (name[0] == '.')
4585 return h;
4586
4587 len = strlen (name);
4588 dot_name = bfd_alloc (abfd, len + 2);
4589 if (dot_name == NULL)
4590 return (struct elf_link_hash_entry *) 0 - 1;
4591 dot_name[0] = '.';
4592 memcpy (dot_name + 1, name, len + 1);
4593 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4594 bfd_release (abfd, dot_name);
4595 return h;
4596 }
4597
4598 /* This function satisfies all old ABI object references to ".bar" if a
4599 new ABI object defines "bar". Well, at least, undefined dot symbols
4600 are made weak. This stops later archive searches from including an
4601 object if we already have a function descriptor definition. It also
4602 prevents the linker complaining about undefined symbols.
4603 We also check and correct mismatched symbol visibility here. The
4604 most restrictive visibility of the function descriptor and the
4605 function entry symbol is used. */
4606
4607 static bfd_boolean
4608 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4609 {
4610 struct ppc_link_hash_table *htab;
4611 struct ppc_link_hash_entry *fdh;
4612
4613 if (eh->elf.root.type == bfd_link_hash_indirect)
4614 return TRUE;
4615
4616 if (eh->elf.root.type == bfd_link_hash_warning)
4617 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4618
4619 if (eh->elf.root.root.string[0] != '.')
4620 abort ();
4621
4622 htab = ppc_hash_table (info);
4623 if (htab == NULL)
4624 return FALSE;
4625
4626 fdh = lookup_fdh (eh, htab);
4627 if (fdh == NULL)
4628 {
4629 if (!info->relocatable
4630 && (eh->elf.root.type == bfd_link_hash_undefined
4631 || eh->elf.root.type == bfd_link_hash_undefweak)
4632 && eh->elf.ref_regular)
4633 {
4634 /* Make an undefweak function descriptor sym, which is enough to
4635 pull in an --as-needed shared lib, but won't cause link
4636 errors. Archives are handled elsewhere. */
4637 fdh = make_fdh (info, eh);
4638 if (fdh == NULL)
4639 return FALSE;
4640 fdh->elf.ref_regular = 1;
4641 }
4642 }
4643 else
4644 {
4645 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4646 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4647 if (entry_vis < descr_vis)
4648 fdh->elf.other += entry_vis - descr_vis;
4649 else if (entry_vis > descr_vis)
4650 eh->elf.other += descr_vis - entry_vis;
4651
4652 if ((fdh->elf.root.type == bfd_link_hash_defined
4653 || fdh->elf.root.type == bfd_link_hash_defweak)
4654 && eh->elf.root.type == bfd_link_hash_undefined)
4655 {
4656 eh->elf.root.type = bfd_link_hash_undefweak;
4657 eh->was_undefined = 1;
4658 htab->twiddled_syms = 1;
4659 }
4660 }
4661
4662 return TRUE;
4663 }
4664
4665 /* Process list of dot-symbols we made in link_hash_newfunc. */
4666
4667 static bfd_boolean
4668 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4669 {
4670 struct ppc_link_hash_table *htab;
4671 struct ppc_link_hash_entry **p, *eh;
4672
4673 if (!is_ppc64_elf (info->output_bfd))
4674 return TRUE;
4675 htab = ppc_hash_table (info);
4676 if (htab == NULL)
4677 return FALSE;
4678
4679 if (is_ppc64_elf (ibfd))
4680 {
4681 p = &htab->dot_syms;
4682 while ((eh = *p) != NULL)
4683 {
4684 *p = NULL;
4685 if (!add_symbol_adjust (eh, info))
4686 return FALSE;
4687 p = &eh->u.next_dot_sym;
4688 }
4689 }
4690
4691 /* Clear the list for non-ppc64 input files. */
4692 p = &htab->dot_syms;
4693 while ((eh = *p) != NULL)
4694 {
4695 *p = NULL;
4696 p = &eh->u.next_dot_sym;
4697 }
4698
4699 /* We need to fix the undefs list for any syms we have twiddled to
4700 undef_weak. */
4701 if (htab->twiddled_syms)
4702 {
4703 bfd_link_repair_undef_list (&htab->elf.root);
4704 htab->twiddled_syms = 0;
4705 }
4706 return TRUE;
4707 }
4708
4709 /* Undo hash table changes when an --as-needed input file is determined
4710 not to be needed. */
4711
4712 static bfd_boolean
4713 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4714 struct bfd_link_info *info)
4715 {
4716 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4717
4718 if (htab == NULL)
4719 return FALSE;
4720
4721 htab->dot_syms = NULL;
4722 return TRUE;
4723 }
4724
4725 /* If --just-symbols against a final linked binary, then assume we need
4726 toc adjusting stubs when calling functions defined there. */
4727
4728 static void
4729 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4730 {
4731 if ((sec->flags & SEC_CODE) != 0
4732 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4733 && is_ppc64_elf (sec->owner))
4734 {
4735 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4736 if (got != NULL
4737 && got->size >= elf_backend_got_header_size
4738 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4739 sec->has_toc_reloc = 1;
4740 }
4741 _bfd_elf_link_just_syms (sec, info);
4742 }
4743
4744 static struct plt_entry **
4745 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4746 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4747 {
4748 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4749 struct plt_entry **local_plt;
4750 unsigned char *local_got_tls_masks;
4751
4752 if (local_got_ents == NULL)
4753 {
4754 bfd_size_type size = symtab_hdr->sh_info;
4755
4756 size *= (sizeof (*local_got_ents)
4757 + sizeof (*local_plt)
4758 + sizeof (*local_got_tls_masks));
4759 local_got_ents = bfd_zalloc (abfd, size);
4760 if (local_got_ents == NULL)
4761 return NULL;
4762 elf_local_got_ents (abfd) = local_got_ents;
4763 }
4764
4765 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4766 {
4767 struct got_entry *ent;
4768
4769 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4770 if (ent->addend == r_addend
4771 && ent->owner == abfd
4772 && ent->tls_type == tls_type)
4773 break;
4774 if (ent == NULL)
4775 {
4776 bfd_size_type amt = sizeof (*ent);
4777 ent = bfd_alloc (abfd, amt);
4778 if (ent == NULL)
4779 return FALSE;
4780 ent->next = local_got_ents[r_symndx];
4781 ent->addend = r_addend;
4782 ent->owner = abfd;
4783 ent->tls_type = tls_type;
4784 ent->is_indirect = FALSE;
4785 ent->got.refcount = 0;
4786 local_got_ents[r_symndx] = ent;
4787 }
4788 ent->got.refcount += 1;
4789 }
4790
4791 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4792 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4793 local_got_tls_masks[r_symndx] |= tls_type;
4794
4795 return local_plt + r_symndx;
4796 }
4797
4798 static bfd_boolean
4799 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4800 {
4801 struct plt_entry *ent;
4802
4803 for (ent = *plist; ent != NULL; ent = ent->next)
4804 if (ent->addend == addend)
4805 break;
4806 if (ent == NULL)
4807 {
4808 bfd_size_type amt = sizeof (*ent);
4809 ent = bfd_alloc (abfd, amt);
4810 if (ent == NULL)
4811 return FALSE;
4812 ent->next = *plist;
4813 ent->addend = addend;
4814 ent->plt.refcount = 0;
4815 *plist = ent;
4816 }
4817 ent->plt.refcount += 1;
4818 return TRUE;
4819 }
4820
4821 static bfd_boolean
4822 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4823 {
4824 return (r_type == R_PPC64_REL24
4825 || r_type == R_PPC64_REL14
4826 || r_type == R_PPC64_REL14_BRTAKEN
4827 || r_type == R_PPC64_REL14_BRNTAKEN
4828 || r_type == R_PPC64_ADDR24
4829 || r_type == R_PPC64_ADDR14
4830 || r_type == R_PPC64_ADDR14_BRTAKEN
4831 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4832 }
4833
4834 /* Look through the relocs for a section during the first phase, and
4835 calculate needed space in the global offset table, procedure
4836 linkage table, and dynamic reloc sections. */
4837
4838 static bfd_boolean
4839 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4840 asection *sec, const Elf_Internal_Rela *relocs)
4841 {
4842 struct ppc_link_hash_table *htab;
4843 Elf_Internal_Shdr *symtab_hdr;
4844 struct elf_link_hash_entry **sym_hashes;
4845 const Elf_Internal_Rela *rel;
4846 const Elf_Internal_Rela *rel_end;
4847 asection *sreloc;
4848 asection **opd_sym_map;
4849 struct elf_link_hash_entry *tga, *dottga;
4850
4851 if (info->relocatable)
4852 return TRUE;
4853
4854 /* Don't do anything special with non-loaded, non-alloced sections.
4855 In particular, any relocs in such sections should not affect GOT
4856 and PLT reference counting (ie. we don't allow them to create GOT
4857 or PLT entries), there's no possibility or desire to optimize TLS
4858 relocs, and there's not much point in propagating relocs to shared
4859 libs that the dynamic linker won't relocate. */
4860 if ((sec->flags & SEC_ALLOC) == 0)
4861 return TRUE;
4862
4863 BFD_ASSERT (is_ppc64_elf (abfd));
4864
4865 htab = ppc_hash_table (info);
4866 if (htab == NULL)
4867 return FALSE;
4868
4869 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4870 FALSE, FALSE, TRUE);
4871 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4872 FALSE, FALSE, TRUE);
4873 symtab_hdr = &elf_symtab_hdr (abfd);
4874 sym_hashes = elf_sym_hashes (abfd);
4875 sreloc = NULL;
4876 opd_sym_map = NULL;
4877 if (strcmp (sec->name, ".opd") == 0)
4878 {
4879 /* Garbage collection needs some extra help with .opd sections.
4880 We don't want to necessarily keep everything referenced by
4881 relocs in .opd, as that would keep all functions. Instead,
4882 if we reference an .opd symbol (a function descriptor), we
4883 want to keep the function code symbol's section. This is
4884 easy for global symbols, but for local syms we need to keep
4885 information about the associated function section. */
4886 bfd_size_type amt;
4887
4888 amt = sec->size * sizeof (*opd_sym_map) / 8;
4889 opd_sym_map = bfd_zalloc (abfd, amt);
4890 if (opd_sym_map == NULL)
4891 return FALSE;
4892 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4893 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4894 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4895 }
4896
4897 if (htab->sfpr == NULL
4898 && !create_linkage_sections (htab->elf.dynobj, info))
4899 return FALSE;
4900
4901 rel_end = relocs + sec->reloc_count;
4902 for (rel = relocs; rel < rel_end; rel++)
4903 {
4904 unsigned long r_symndx;
4905 struct elf_link_hash_entry *h;
4906 enum elf_ppc64_reloc_type r_type;
4907 int tls_type;
4908 struct _ppc64_elf_section_data *ppc64_sec;
4909 struct plt_entry **ifunc;
4910
4911 r_symndx = ELF64_R_SYM (rel->r_info);
4912 if (r_symndx < symtab_hdr->sh_info)
4913 h = NULL;
4914 else
4915 {
4916 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4917 h = elf_follow_link (h);
4918 }
4919
4920 tls_type = 0;
4921 ifunc = NULL;
4922 if (h != NULL)
4923 {
4924 if (h->type == STT_GNU_IFUNC)
4925 {
4926 h->needs_plt = 1;
4927 ifunc = &h->plt.plist;
4928 }
4929 }
4930 else
4931 {
4932 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4933 abfd, r_symndx);
4934 if (isym == NULL)
4935 return FALSE;
4936
4937 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4938 {
4939 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4940 rel->r_addend, PLT_IFUNC);
4941 if (ifunc == NULL)
4942 return FALSE;
4943 }
4944 }
4945 r_type = ELF64_R_TYPE (rel->r_info);
4946 if (is_branch_reloc (r_type))
4947 {
4948 if (h != NULL && (h == tga || h == dottga))
4949 {
4950 if (rel != relocs
4951 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4952 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4953 /* We have a new-style __tls_get_addr call with a marker
4954 reloc. */
4955 ;
4956 else
4957 /* Mark this section as having an old-style call. */
4958 sec->has_tls_get_addr_call = 1;
4959 }
4960
4961 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4962 if (ifunc != NULL
4963 && !update_plt_info (abfd, ifunc, rel->r_addend))
4964 return FALSE;
4965 }
4966
4967 switch (r_type)
4968 {
4969 case R_PPC64_TLSGD:
4970 case R_PPC64_TLSLD:
4971 /* These special tls relocs tie a call to __tls_get_addr with
4972 its parameter symbol. */
4973 break;
4974
4975 case R_PPC64_GOT_TLSLD16:
4976 case R_PPC64_GOT_TLSLD16_LO:
4977 case R_PPC64_GOT_TLSLD16_HI:
4978 case R_PPC64_GOT_TLSLD16_HA:
4979 tls_type = TLS_TLS | TLS_LD;
4980 goto dogottls;
4981
4982 case R_PPC64_GOT_TLSGD16:
4983 case R_PPC64_GOT_TLSGD16_LO:
4984 case R_PPC64_GOT_TLSGD16_HI:
4985 case R_PPC64_GOT_TLSGD16_HA:
4986 tls_type = TLS_TLS | TLS_GD;
4987 goto dogottls;
4988
4989 case R_PPC64_GOT_TPREL16_DS:
4990 case R_PPC64_GOT_TPREL16_LO_DS:
4991 case R_PPC64_GOT_TPREL16_HI:
4992 case R_PPC64_GOT_TPREL16_HA:
4993 if (!info->executable)
4994 info->flags |= DF_STATIC_TLS;
4995 tls_type = TLS_TLS | TLS_TPREL;
4996 goto dogottls;
4997
4998 case R_PPC64_GOT_DTPREL16_DS:
4999 case R_PPC64_GOT_DTPREL16_LO_DS:
5000 case R_PPC64_GOT_DTPREL16_HI:
5001 case R_PPC64_GOT_DTPREL16_HA:
5002 tls_type = TLS_TLS | TLS_DTPREL;
5003 dogottls:
5004 sec->has_tls_reloc = 1;
5005 /* Fall thru */
5006
5007 case R_PPC64_GOT16:
5008 case R_PPC64_GOT16_DS:
5009 case R_PPC64_GOT16_HA:
5010 case R_PPC64_GOT16_HI:
5011 case R_PPC64_GOT16_LO:
5012 case R_PPC64_GOT16_LO_DS:
5013 /* This symbol requires a global offset table entry. */
5014 sec->has_toc_reloc = 1;
5015 if (r_type == R_PPC64_GOT_TLSLD16
5016 || r_type == R_PPC64_GOT_TLSGD16
5017 || r_type == R_PPC64_GOT_TPREL16_DS
5018 || r_type == R_PPC64_GOT_DTPREL16_DS
5019 || r_type == R_PPC64_GOT16
5020 || r_type == R_PPC64_GOT16_DS)
5021 {
5022 htab->do_multi_toc = 1;
5023 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5024 }
5025
5026 if (ppc64_elf_tdata (abfd)->got == NULL
5027 && !create_got_section (abfd, info))
5028 return FALSE;
5029
5030 if (h != NULL)
5031 {
5032 struct ppc_link_hash_entry *eh;
5033 struct got_entry *ent;
5034
5035 eh = (struct ppc_link_hash_entry *) h;
5036 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5037 if (ent->addend == rel->r_addend
5038 && ent->owner == abfd
5039 && ent->tls_type == tls_type)
5040 break;
5041 if (ent == NULL)
5042 {
5043 bfd_size_type amt = sizeof (*ent);
5044 ent = bfd_alloc (abfd, amt);
5045 if (ent == NULL)
5046 return FALSE;
5047 ent->next = eh->elf.got.glist;
5048 ent->addend = rel->r_addend;
5049 ent->owner = abfd;
5050 ent->tls_type = tls_type;
5051 ent->is_indirect = FALSE;
5052 ent->got.refcount = 0;
5053 eh->elf.got.glist = ent;
5054 }
5055 ent->got.refcount += 1;
5056 eh->tls_mask |= tls_type;
5057 }
5058 else
5059 /* This is a global offset table entry for a local symbol. */
5060 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5061 rel->r_addend, tls_type))
5062 return FALSE;
5063 break;
5064
5065 case R_PPC64_PLT16_HA:
5066 case R_PPC64_PLT16_HI:
5067 case R_PPC64_PLT16_LO:
5068 case R_PPC64_PLT32:
5069 case R_PPC64_PLT64:
5070 /* This symbol requires a procedure linkage table entry. We
5071 actually build the entry in adjust_dynamic_symbol,
5072 because this might be a case of linking PIC code without
5073 linking in any dynamic objects, in which case we don't
5074 need to generate a procedure linkage table after all. */
5075 if (h == NULL)
5076 {
5077 /* It does not make sense to have a procedure linkage
5078 table entry for a local symbol. */
5079 bfd_set_error (bfd_error_bad_value);
5080 return FALSE;
5081 }
5082 else
5083 {
5084 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5085 return FALSE;
5086 h->needs_plt = 1;
5087 if (h->root.root.string[0] == '.'
5088 && h->root.root.string[1] != '\0')
5089 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5090 }
5091 break;
5092
5093 /* The following relocations don't need to propagate the
5094 relocation if linking a shared object since they are
5095 section relative. */
5096 case R_PPC64_SECTOFF:
5097 case R_PPC64_SECTOFF_LO:
5098 case R_PPC64_SECTOFF_HI:
5099 case R_PPC64_SECTOFF_HA:
5100 case R_PPC64_SECTOFF_DS:
5101 case R_PPC64_SECTOFF_LO_DS:
5102 case R_PPC64_DTPREL16:
5103 case R_PPC64_DTPREL16_LO:
5104 case R_PPC64_DTPREL16_HI:
5105 case R_PPC64_DTPREL16_HA:
5106 case R_PPC64_DTPREL16_DS:
5107 case R_PPC64_DTPREL16_LO_DS:
5108 case R_PPC64_DTPREL16_HIGHER:
5109 case R_PPC64_DTPREL16_HIGHERA:
5110 case R_PPC64_DTPREL16_HIGHEST:
5111 case R_PPC64_DTPREL16_HIGHESTA:
5112 break;
5113
5114 /* Nor do these. */
5115 case R_PPC64_REL16:
5116 case R_PPC64_REL16_LO:
5117 case R_PPC64_REL16_HI:
5118 case R_PPC64_REL16_HA:
5119 break;
5120
5121 case R_PPC64_TOC16:
5122 case R_PPC64_TOC16_DS:
5123 htab->do_multi_toc = 1;
5124 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5125 case R_PPC64_TOC16_LO:
5126 case R_PPC64_TOC16_HI:
5127 case R_PPC64_TOC16_HA:
5128 case R_PPC64_TOC16_LO_DS:
5129 sec->has_toc_reloc = 1;
5130 break;
5131
5132 /* This relocation describes the C++ object vtable hierarchy.
5133 Reconstruct it for later use during GC. */
5134 case R_PPC64_GNU_VTINHERIT:
5135 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5136 return FALSE;
5137 break;
5138
5139 /* This relocation describes which C++ vtable entries are actually
5140 used. Record for later use during GC. */
5141 case R_PPC64_GNU_VTENTRY:
5142 BFD_ASSERT (h != NULL);
5143 if (h != NULL
5144 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5145 return FALSE;
5146 break;
5147
5148 case R_PPC64_REL14:
5149 case R_PPC64_REL14_BRTAKEN:
5150 case R_PPC64_REL14_BRNTAKEN:
5151 {
5152 asection *dest = NULL;
5153
5154 /* Heuristic: If jumping outside our section, chances are
5155 we are going to need a stub. */
5156 if (h != NULL)
5157 {
5158 /* If the sym is weak it may be overridden later, so
5159 don't assume we know where a weak sym lives. */
5160 if (h->root.type == bfd_link_hash_defined)
5161 dest = h->root.u.def.section;
5162 }
5163 else
5164 {
5165 Elf_Internal_Sym *isym;
5166
5167 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5168 abfd, r_symndx);
5169 if (isym == NULL)
5170 return FALSE;
5171
5172 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5173 }
5174
5175 if (dest != sec)
5176 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5177 }
5178 /* Fall through. */
5179
5180 case R_PPC64_REL24:
5181 if (h != NULL && ifunc == NULL)
5182 {
5183 /* We may need a .plt entry if the function this reloc
5184 refers to is in a shared lib. */
5185 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5186 return FALSE;
5187 h->needs_plt = 1;
5188 if (h->root.root.string[0] == '.'
5189 && h->root.root.string[1] != '\0')
5190 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5191 if (h == tga || h == dottga)
5192 sec->has_tls_reloc = 1;
5193 }
5194 break;
5195
5196 case R_PPC64_TPREL64:
5197 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5198 if (!info->executable)
5199 info->flags |= DF_STATIC_TLS;
5200 goto dotlstoc;
5201
5202 case R_PPC64_DTPMOD64:
5203 if (rel + 1 < rel_end
5204 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5205 && rel[1].r_offset == rel->r_offset + 8)
5206 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5207 else
5208 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5209 goto dotlstoc;
5210
5211 case R_PPC64_DTPREL64:
5212 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5213 if (rel != relocs
5214 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5215 && rel[-1].r_offset == rel->r_offset - 8)
5216 /* This is the second reloc of a dtpmod, dtprel pair.
5217 Don't mark with TLS_DTPREL. */
5218 goto dodyn;
5219
5220 dotlstoc:
5221 sec->has_tls_reloc = 1;
5222 if (h != NULL)
5223 {
5224 struct ppc_link_hash_entry *eh;
5225 eh = (struct ppc_link_hash_entry *) h;
5226 eh->tls_mask |= tls_type;
5227 }
5228 else
5229 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5230 rel->r_addend, tls_type))
5231 return FALSE;
5232
5233 ppc64_sec = ppc64_elf_section_data (sec);
5234 if (ppc64_sec->sec_type != sec_toc)
5235 {
5236 bfd_size_type amt;
5237
5238 /* One extra to simplify get_tls_mask. */
5239 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5240 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5241 if (ppc64_sec->u.toc.symndx == NULL)
5242 return FALSE;
5243 amt = sec->size * sizeof (bfd_vma) / 8;
5244 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5245 if (ppc64_sec->u.toc.add == NULL)
5246 return FALSE;
5247 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5248 ppc64_sec->sec_type = sec_toc;
5249 }
5250 BFD_ASSERT (rel->r_offset % 8 == 0);
5251 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5252 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5253
5254 /* Mark the second slot of a GD or LD entry.
5255 -1 to indicate GD and -2 to indicate LD. */
5256 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5257 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5258 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5259 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5260 goto dodyn;
5261
5262 case R_PPC64_TPREL16:
5263 case R_PPC64_TPREL16_LO:
5264 case R_PPC64_TPREL16_HI:
5265 case R_PPC64_TPREL16_HA:
5266 case R_PPC64_TPREL16_DS:
5267 case R_PPC64_TPREL16_LO_DS:
5268 case R_PPC64_TPREL16_HIGHER:
5269 case R_PPC64_TPREL16_HIGHERA:
5270 case R_PPC64_TPREL16_HIGHEST:
5271 case R_PPC64_TPREL16_HIGHESTA:
5272 if (info->shared)
5273 {
5274 if (!info->executable)
5275 info->flags |= DF_STATIC_TLS;
5276 goto dodyn;
5277 }
5278 break;
5279
5280 case R_PPC64_ADDR64:
5281 if (opd_sym_map != NULL
5282 && rel + 1 < rel_end
5283 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5284 {
5285 if (h != NULL)
5286 {
5287 if (h->root.root.string[0] == '.'
5288 && h->root.root.string[1] != 0
5289 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5290 ;
5291 else
5292 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5293 }
5294 else
5295 {
5296 asection *s;
5297 Elf_Internal_Sym *isym;
5298
5299 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5300 abfd, r_symndx);
5301 if (isym == NULL)
5302 return FALSE;
5303
5304 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5305 if (s != NULL && s != sec)
5306 opd_sym_map[rel->r_offset / 8] = s;
5307 }
5308 }
5309 /* Fall through. */
5310
5311 case R_PPC64_REL30:
5312 case R_PPC64_REL32:
5313 case R_PPC64_REL64:
5314 case R_PPC64_ADDR14:
5315 case R_PPC64_ADDR14_BRNTAKEN:
5316 case R_PPC64_ADDR14_BRTAKEN:
5317 case R_PPC64_ADDR16:
5318 case R_PPC64_ADDR16_DS:
5319 case R_PPC64_ADDR16_HA:
5320 case R_PPC64_ADDR16_HI:
5321 case R_PPC64_ADDR16_HIGHER:
5322 case R_PPC64_ADDR16_HIGHERA:
5323 case R_PPC64_ADDR16_HIGHEST:
5324 case R_PPC64_ADDR16_HIGHESTA:
5325 case R_PPC64_ADDR16_LO:
5326 case R_PPC64_ADDR16_LO_DS:
5327 case R_PPC64_ADDR24:
5328 case R_PPC64_ADDR32:
5329 case R_PPC64_UADDR16:
5330 case R_PPC64_UADDR32:
5331 case R_PPC64_UADDR64:
5332 case R_PPC64_TOC:
5333 if (h != NULL && !info->shared)
5334 /* We may need a copy reloc. */
5335 h->non_got_ref = 1;
5336
5337 /* Don't propagate .opd relocs. */
5338 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5339 break;
5340
5341 /* If we are creating a shared library, and this is a reloc
5342 against a global symbol, or a non PC relative reloc
5343 against a local symbol, then we need to copy the reloc
5344 into the shared library. However, if we are linking with
5345 -Bsymbolic, we do not need to copy a reloc against a
5346 global symbol which is defined in an object we are
5347 including in the link (i.e., DEF_REGULAR is set). At
5348 this point we have not seen all the input files, so it is
5349 possible that DEF_REGULAR is not set now but will be set
5350 later (it is never cleared). In case of a weak definition,
5351 DEF_REGULAR may be cleared later by a strong definition in
5352 a shared library. We account for that possibility below by
5353 storing information in the dyn_relocs field of the hash
5354 table entry. A similar situation occurs when creating
5355 shared libraries and symbol visibility changes render the
5356 symbol local.
5357
5358 If on the other hand, we are creating an executable, we
5359 may need to keep relocations for symbols satisfied by a
5360 dynamic library if we manage to avoid copy relocs for the
5361 symbol. */
5362 dodyn:
5363 if ((info->shared
5364 && (must_be_dyn_reloc (info, r_type)
5365 || (h != NULL
5366 && (! info->symbolic
5367 || h->root.type == bfd_link_hash_defweak
5368 || !h->def_regular))))
5369 || (ELIMINATE_COPY_RELOCS
5370 && !info->shared
5371 && h != NULL
5372 && (h->root.type == bfd_link_hash_defweak
5373 || !h->def_regular))
5374 || (!info->shared
5375 && ifunc != NULL))
5376 {
5377 struct elf_dyn_relocs *p;
5378 struct elf_dyn_relocs **head;
5379
5380 /* We must copy these reloc types into the output file.
5381 Create a reloc section in dynobj and make room for
5382 this reloc. */
5383 if (sreloc == NULL)
5384 {
5385 sreloc = _bfd_elf_make_dynamic_reloc_section
5386 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5387
5388 if (sreloc == NULL)
5389 return FALSE;
5390 }
5391
5392 /* If this is a global symbol, we count the number of
5393 relocations we need for this symbol. */
5394 if (h != NULL)
5395 {
5396 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5397 }
5398 else
5399 {
5400 /* Track dynamic relocs needed for local syms too.
5401 We really need local syms available to do this
5402 easily. Oh well. */
5403 asection *s;
5404 void *vpp;
5405 Elf_Internal_Sym *isym;
5406
5407 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5408 abfd, r_symndx);
5409 if (isym == NULL)
5410 return FALSE;
5411
5412 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5413 if (s == NULL)
5414 s = sec;
5415
5416 vpp = &elf_section_data (s)->local_dynrel;
5417 head = (struct elf_dyn_relocs **) vpp;
5418 }
5419
5420 p = *head;
5421 if (p == NULL || p->sec != sec)
5422 {
5423 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5424 if (p == NULL)
5425 return FALSE;
5426 p->next = *head;
5427 *head = p;
5428 p->sec = sec;
5429 p->count = 0;
5430 p->pc_count = 0;
5431 }
5432
5433 p->count += 1;
5434 if (!must_be_dyn_reloc (info, r_type))
5435 p->pc_count += 1;
5436 }
5437 break;
5438
5439 default:
5440 break;
5441 }
5442 }
5443
5444 return TRUE;
5445 }
5446
5447 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5448 of the code entry point, and its section. */
5449
5450 static bfd_vma
5451 opd_entry_value (asection *opd_sec,
5452 bfd_vma offset,
5453 asection **code_sec,
5454 bfd_vma *code_off)
5455 {
5456 bfd *opd_bfd = opd_sec->owner;
5457 Elf_Internal_Rela *relocs;
5458 Elf_Internal_Rela *lo, *hi, *look;
5459 bfd_vma val;
5460
5461 /* No relocs implies we are linking a --just-symbols object. */
5462 if (opd_sec->reloc_count == 0)
5463 {
5464 char buf[8];
5465
5466 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5467 return (bfd_vma) -1;
5468
5469 val = bfd_get_64 (opd_bfd, buf);
5470 if (code_sec != NULL)
5471 {
5472 asection *sec, *likely = NULL;
5473 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5474 if (sec->vma <= val
5475 && (sec->flags & SEC_LOAD) != 0
5476 && (sec->flags & SEC_ALLOC) != 0)
5477 likely = sec;
5478 if (likely != NULL)
5479 {
5480 *code_sec = likely;
5481 if (code_off != NULL)
5482 *code_off = val - likely->vma;
5483 }
5484 }
5485 return val;
5486 }
5487
5488 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5489
5490 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5491 if (relocs == NULL)
5492 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5493
5494 /* Go find the opd reloc at the sym address. */
5495 lo = relocs;
5496 BFD_ASSERT (lo != NULL);
5497 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5498 val = (bfd_vma) -1;
5499 while (lo < hi)
5500 {
5501 look = lo + (hi - lo) / 2;
5502 if (look->r_offset < offset)
5503 lo = look + 1;
5504 else if (look->r_offset > offset)
5505 hi = look;
5506 else
5507 {
5508 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5509
5510 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5511 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5512 {
5513 unsigned long symndx = ELF64_R_SYM (look->r_info);
5514 asection *sec;
5515
5516 if (symndx < symtab_hdr->sh_info)
5517 {
5518 Elf_Internal_Sym *sym;
5519
5520 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5521 if (sym == NULL)
5522 {
5523 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5524 symtab_hdr->sh_info,
5525 0, NULL, NULL, NULL);
5526 if (sym == NULL)
5527 break;
5528 symtab_hdr->contents = (bfd_byte *) sym;
5529 }
5530
5531 sym += symndx;
5532 val = sym->st_value;
5533 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5534 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5535 }
5536 else
5537 {
5538 struct elf_link_hash_entry **sym_hashes;
5539 struct elf_link_hash_entry *rh;
5540
5541 sym_hashes = elf_sym_hashes (opd_bfd);
5542 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5543 rh = elf_follow_link (rh);
5544 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5545 || rh->root.type == bfd_link_hash_defweak);
5546 val = rh->root.u.def.value;
5547 sec = rh->root.u.def.section;
5548 }
5549 val += look->r_addend;
5550 if (code_off != NULL)
5551 *code_off = val;
5552 if (code_sec != NULL)
5553 *code_sec = sec;
5554 if (sec != NULL && sec->output_section != NULL)
5555 val += sec->output_section->vma + sec->output_offset;
5556 }
5557 break;
5558 }
5559 }
5560
5561 return val;
5562 }
5563
5564 /* Return true if symbol is defined in a regular object file. */
5565
5566 static bfd_boolean
5567 is_static_defined (struct elf_link_hash_entry *h)
5568 {
5569 return ((h->root.type == bfd_link_hash_defined
5570 || h->root.type == bfd_link_hash_defweak)
5571 && h->root.u.def.section != NULL
5572 && h->root.u.def.section->output_section != NULL);
5573 }
5574
5575 /* If FDH is a function descriptor symbol, return the associated code
5576 entry symbol if it is defined. Return NULL otherwise. */
5577
5578 static struct ppc_link_hash_entry *
5579 defined_code_entry (struct ppc_link_hash_entry *fdh)
5580 {
5581 if (fdh->is_func_descriptor)
5582 {
5583 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5584 if (fh->elf.root.type == bfd_link_hash_defined
5585 || fh->elf.root.type == bfd_link_hash_defweak)
5586 return fh;
5587 }
5588 return NULL;
5589 }
5590
5591 /* If FH is a function code entry symbol, return the associated
5592 function descriptor symbol if it is defined. Return NULL otherwise. */
5593
5594 static struct ppc_link_hash_entry *
5595 defined_func_desc (struct ppc_link_hash_entry *fh)
5596 {
5597 if (fh->oh != NULL
5598 && fh->oh->is_func_descriptor)
5599 {
5600 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5601 if (fdh->elf.root.type == bfd_link_hash_defined
5602 || fdh->elf.root.type == bfd_link_hash_defweak)
5603 return fdh;
5604 }
5605 return NULL;
5606 }
5607
5608 /* Mark all our entry sym sections, both opd and code section. */
5609
5610 static void
5611 ppc64_elf_gc_keep (struct bfd_link_info *info)
5612 {
5613 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5614 struct bfd_sym_chain *sym;
5615
5616 if (htab == NULL)
5617 return;
5618
5619 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5620 {
5621 struct ppc_link_hash_entry *eh, *fh;
5622 asection *sec;
5623
5624 eh = (struct ppc_link_hash_entry *)
5625 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5626 if (eh == NULL)
5627 continue;
5628 if (eh->elf.root.type != bfd_link_hash_defined
5629 && eh->elf.root.type != bfd_link_hash_defweak)
5630 continue;
5631
5632 fh = defined_code_entry (eh);
5633 if (fh != NULL)
5634 {
5635 sec = fh->elf.root.u.def.section;
5636 sec->flags |= SEC_KEEP;
5637 }
5638 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5639 && opd_entry_value (eh->elf.root.u.def.section,
5640 eh->elf.root.u.def.value,
5641 &sec, NULL) != (bfd_vma) -1)
5642 sec->flags |= SEC_KEEP;
5643
5644 sec = eh->elf.root.u.def.section;
5645 sec->flags |= SEC_KEEP;
5646 }
5647 }
5648
5649 /* Mark sections containing dynamically referenced symbols. When
5650 building shared libraries, we must assume that any visible symbol is
5651 referenced. */
5652
5653 static bfd_boolean
5654 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5655 {
5656 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5657 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5658 struct ppc_link_hash_entry *fdh;
5659
5660 /* Dynamic linking info is on the func descriptor sym. */
5661 fdh = defined_func_desc (eh);
5662 if (fdh != NULL)
5663 eh = fdh;
5664
5665 if ((eh->elf.root.type == bfd_link_hash_defined
5666 || eh->elf.root.type == bfd_link_hash_defweak)
5667 && (eh->elf.ref_dynamic
5668 || (!info->executable
5669 && eh->elf.def_regular
5670 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5671 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5672 {
5673 asection *code_sec;
5674 struct ppc_link_hash_entry *fh;
5675
5676 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5677
5678 /* Function descriptor syms cause the associated
5679 function code sym section to be marked. */
5680 fh = defined_code_entry (eh);
5681 if (fh != NULL)
5682 {
5683 code_sec = fh->elf.root.u.def.section;
5684 code_sec->flags |= SEC_KEEP;
5685 }
5686 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5687 && opd_entry_value (eh->elf.root.u.def.section,
5688 eh->elf.root.u.def.value,
5689 &code_sec, NULL) != (bfd_vma) -1)
5690 code_sec->flags |= SEC_KEEP;
5691 }
5692
5693 return TRUE;
5694 }
5695
5696 /* Return the section that should be marked against GC for a given
5697 relocation. */
5698
5699 static asection *
5700 ppc64_elf_gc_mark_hook (asection *sec,
5701 struct bfd_link_info *info,
5702 Elf_Internal_Rela *rel,
5703 struct elf_link_hash_entry *h,
5704 Elf_Internal_Sym *sym)
5705 {
5706 asection *rsec;
5707
5708 /* Syms return NULL if we're marking .opd, so we avoid marking all
5709 function sections, as all functions are referenced in .opd. */
5710 rsec = NULL;
5711 if (get_opd_info (sec) != NULL)
5712 return rsec;
5713
5714 if (h != NULL)
5715 {
5716 enum elf_ppc64_reloc_type r_type;
5717 struct ppc_link_hash_entry *eh, *fh, *fdh;
5718
5719 r_type = ELF64_R_TYPE (rel->r_info);
5720 switch (r_type)
5721 {
5722 case R_PPC64_GNU_VTINHERIT:
5723 case R_PPC64_GNU_VTENTRY:
5724 break;
5725
5726 default:
5727 switch (h->root.type)
5728 {
5729 case bfd_link_hash_defined:
5730 case bfd_link_hash_defweak:
5731 eh = (struct ppc_link_hash_entry *) h;
5732 fdh = defined_func_desc (eh);
5733 if (fdh != NULL)
5734 eh = fdh;
5735
5736 /* Function descriptor syms cause the associated
5737 function code sym section to be marked. */
5738 fh = defined_code_entry (eh);
5739 if (fh != NULL)
5740 {
5741 /* They also mark their opd section. */
5742 eh->elf.root.u.def.section->gc_mark = 1;
5743
5744 rsec = fh->elf.root.u.def.section;
5745 }
5746 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5747 && opd_entry_value (eh->elf.root.u.def.section,
5748 eh->elf.root.u.def.value,
5749 &rsec, NULL) != (bfd_vma) -1)
5750 eh->elf.root.u.def.section->gc_mark = 1;
5751 else
5752 rsec = h->root.u.def.section;
5753 break;
5754
5755 case bfd_link_hash_common:
5756 rsec = h->root.u.c.p->section;
5757 break;
5758
5759 default:
5760 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5761 }
5762 }
5763 }
5764 else
5765 {
5766 struct _opd_sec_data *opd;
5767
5768 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5769 opd = get_opd_info (rsec);
5770 if (opd != NULL && opd->func_sec != NULL)
5771 {
5772 rsec->gc_mark = 1;
5773
5774 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5775 }
5776 }
5777
5778 return rsec;
5779 }
5780
5781 /* Update the .got, .plt. and dynamic reloc reference counts for the
5782 section being removed. */
5783
5784 static bfd_boolean
5785 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5786 asection *sec, const Elf_Internal_Rela *relocs)
5787 {
5788 struct ppc_link_hash_table *htab;
5789 Elf_Internal_Shdr *symtab_hdr;
5790 struct elf_link_hash_entry **sym_hashes;
5791 struct got_entry **local_got_ents;
5792 const Elf_Internal_Rela *rel, *relend;
5793
5794 if (info->relocatable)
5795 return TRUE;
5796
5797 if ((sec->flags & SEC_ALLOC) == 0)
5798 return TRUE;
5799
5800 elf_section_data (sec)->local_dynrel = NULL;
5801
5802 htab = ppc_hash_table (info);
5803 if (htab == NULL)
5804 return FALSE;
5805
5806 symtab_hdr = &elf_symtab_hdr (abfd);
5807 sym_hashes = elf_sym_hashes (abfd);
5808 local_got_ents = elf_local_got_ents (abfd);
5809
5810 relend = relocs + sec->reloc_count;
5811 for (rel = relocs; rel < relend; rel++)
5812 {
5813 unsigned long r_symndx;
5814 enum elf_ppc64_reloc_type r_type;
5815 struct elf_link_hash_entry *h = NULL;
5816 unsigned char tls_type = 0;
5817
5818 r_symndx = ELF64_R_SYM (rel->r_info);
5819 r_type = ELF64_R_TYPE (rel->r_info);
5820 if (r_symndx >= symtab_hdr->sh_info)
5821 {
5822 struct ppc_link_hash_entry *eh;
5823 struct elf_dyn_relocs **pp;
5824 struct elf_dyn_relocs *p;
5825
5826 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5827 h = elf_follow_link (h);
5828 eh = (struct ppc_link_hash_entry *) h;
5829
5830 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5831 if (p->sec == sec)
5832 {
5833 /* Everything must go for SEC. */
5834 *pp = p->next;
5835 break;
5836 }
5837 }
5838
5839 if (is_branch_reloc (r_type))
5840 {
5841 struct plt_entry **ifunc = NULL;
5842 if (h != NULL)
5843 {
5844 if (h->type == STT_GNU_IFUNC)
5845 ifunc = &h->plt.plist;
5846 }
5847 else if (local_got_ents != NULL)
5848 {
5849 struct plt_entry **local_plt = (struct plt_entry **)
5850 (local_got_ents + symtab_hdr->sh_info);
5851 unsigned char *local_got_tls_masks = (unsigned char *)
5852 (local_plt + symtab_hdr->sh_info);
5853 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5854 ifunc = local_plt + r_symndx;
5855 }
5856 if (ifunc != NULL)
5857 {
5858 struct plt_entry *ent;
5859
5860 for (ent = *ifunc; ent != NULL; ent = ent->next)
5861 if (ent->addend == rel->r_addend)
5862 break;
5863 if (ent == NULL)
5864 abort ();
5865 if (ent->plt.refcount > 0)
5866 ent->plt.refcount -= 1;
5867 continue;
5868 }
5869 }
5870
5871 switch (r_type)
5872 {
5873 case R_PPC64_GOT_TLSLD16:
5874 case R_PPC64_GOT_TLSLD16_LO:
5875 case R_PPC64_GOT_TLSLD16_HI:
5876 case R_PPC64_GOT_TLSLD16_HA:
5877 tls_type = TLS_TLS | TLS_LD;
5878 goto dogot;
5879
5880 case R_PPC64_GOT_TLSGD16:
5881 case R_PPC64_GOT_TLSGD16_LO:
5882 case R_PPC64_GOT_TLSGD16_HI:
5883 case R_PPC64_GOT_TLSGD16_HA:
5884 tls_type = TLS_TLS | TLS_GD;
5885 goto dogot;
5886
5887 case R_PPC64_GOT_TPREL16_DS:
5888 case R_PPC64_GOT_TPREL16_LO_DS:
5889 case R_PPC64_GOT_TPREL16_HI:
5890 case R_PPC64_GOT_TPREL16_HA:
5891 tls_type = TLS_TLS | TLS_TPREL;
5892 goto dogot;
5893
5894 case R_PPC64_GOT_DTPREL16_DS:
5895 case R_PPC64_GOT_DTPREL16_LO_DS:
5896 case R_PPC64_GOT_DTPREL16_HI:
5897 case R_PPC64_GOT_DTPREL16_HA:
5898 tls_type = TLS_TLS | TLS_DTPREL;
5899 goto dogot;
5900
5901 case R_PPC64_GOT16:
5902 case R_PPC64_GOT16_DS:
5903 case R_PPC64_GOT16_HA:
5904 case R_PPC64_GOT16_HI:
5905 case R_PPC64_GOT16_LO:
5906 case R_PPC64_GOT16_LO_DS:
5907 dogot:
5908 {
5909 struct got_entry *ent;
5910
5911 if (h != NULL)
5912 ent = h->got.glist;
5913 else
5914 ent = local_got_ents[r_symndx];
5915
5916 for (; ent != NULL; ent = ent->next)
5917 if (ent->addend == rel->r_addend
5918 && ent->owner == abfd
5919 && ent->tls_type == tls_type)
5920 break;
5921 if (ent == NULL)
5922 abort ();
5923 if (ent->got.refcount > 0)
5924 ent->got.refcount -= 1;
5925 }
5926 break;
5927
5928 case R_PPC64_PLT16_HA:
5929 case R_PPC64_PLT16_HI:
5930 case R_PPC64_PLT16_LO:
5931 case R_PPC64_PLT32:
5932 case R_PPC64_PLT64:
5933 case R_PPC64_REL14:
5934 case R_PPC64_REL14_BRNTAKEN:
5935 case R_PPC64_REL14_BRTAKEN:
5936 case R_PPC64_REL24:
5937 if (h != NULL)
5938 {
5939 struct plt_entry *ent;
5940
5941 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5942 if (ent->addend == rel->r_addend)
5943 break;
5944 if (ent != NULL && ent->plt.refcount > 0)
5945 ent->plt.refcount -= 1;
5946 }
5947 break;
5948
5949 default:
5950 break;
5951 }
5952 }
5953 return TRUE;
5954 }
5955
5956 /* The maximum size of .sfpr. */
5957 #define SFPR_MAX (218*4)
5958
5959 struct sfpr_def_parms
5960 {
5961 const char name[12];
5962 unsigned char lo, hi;
5963 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5964 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5965 };
5966
5967 /* Auto-generate _save*, _rest* functions in .sfpr. */
5968
5969 static bfd_boolean
5970 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5971 {
5972 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5973 unsigned int i;
5974 size_t len = strlen (parm->name);
5975 bfd_boolean writing = FALSE;
5976 char sym[16];
5977
5978 if (htab == NULL)
5979 return FALSE;
5980
5981 memcpy (sym, parm->name, len);
5982 sym[len + 2] = 0;
5983
5984 for (i = parm->lo; i <= parm->hi; i++)
5985 {
5986 struct elf_link_hash_entry *h;
5987
5988 sym[len + 0] = i / 10 + '0';
5989 sym[len + 1] = i % 10 + '0';
5990 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5991 if (h != NULL
5992 && !h->def_regular)
5993 {
5994 h->root.type = bfd_link_hash_defined;
5995 h->root.u.def.section = htab->sfpr;
5996 h->root.u.def.value = htab->sfpr->size;
5997 h->type = STT_FUNC;
5998 h->def_regular = 1;
5999 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6000 writing = TRUE;
6001 if (htab->sfpr->contents == NULL)
6002 {
6003 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6004 if (htab->sfpr->contents == NULL)
6005 return FALSE;
6006 }
6007 }
6008 if (writing)
6009 {
6010 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6011 if (i != parm->hi)
6012 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6013 else
6014 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6015 htab->sfpr->size = p - htab->sfpr->contents;
6016 }
6017 }
6018
6019 return TRUE;
6020 }
6021
6022 static bfd_byte *
6023 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6024 {
6025 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6026 return p + 4;
6027 }
6028
6029 static bfd_byte *
6030 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6031 {
6032 p = savegpr0 (abfd, p, r);
6033 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6034 p = p + 4;
6035 bfd_put_32 (abfd, BLR, p);
6036 return p + 4;
6037 }
6038
6039 static bfd_byte *
6040 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6041 {
6042 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6043 return p + 4;
6044 }
6045
6046 static bfd_byte *
6047 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6048 {
6049 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6050 p = p + 4;
6051 p = restgpr0 (abfd, p, r);
6052 bfd_put_32 (abfd, MTLR_R0, p);
6053 p = p + 4;
6054 if (r == 29)
6055 {
6056 p = restgpr0 (abfd, p, 30);
6057 p = restgpr0 (abfd, p, 31);
6058 }
6059 bfd_put_32 (abfd, BLR, p);
6060 return p + 4;
6061 }
6062
6063 static bfd_byte *
6064 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6065 {
6066 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6067 return p + 4;
6068 }
6069
6070 static bfd_byte *
6071 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6072 {
6073 p = savegpr1 (abfd, p, r);
6074 bfd_put_32 (abfd, BLR, p);
6075 return p + 4;
6076 }
6077
6078 static bfd_byte *
6079 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6080 {
6081 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6082 return p + 4;
6083 }
6084
6085 static bfd_byte *
6086 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6087 {
6088 p = restgpr1 (abfd, p, r);
6089 bfd_put_32 (abfd, BLR, p);
6090 return p + 4;
6091 }
6092
6093 static bfd_byte *
6094 savefpr (bfd *abfd, bfd_byte *p, int r)
6095 {
6096 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6097 return p + 4;
6098 }
6099
6100 static bfd_byte *
6101 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6102 {
6103 p = savefpr (abfd, p, r);
6104 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6105 p = p + 4;
6106 bfd_put_32 (abfd, BLR, p);
6107 return p + 4;
6108 }
6109
6110 static bfd_byte *
6111 restfpr (bfd *abfd, bfd_byte *p, int r)
6112 {
6113 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6114 return p + 4;
6115 }
6116
6117 static bfd_byte *
6118 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6119 {
6120 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6121 p = p + 4;
6122 p = restfpr (abfd, p, r);
6123 bfd_put_32 (abfd, MTLR_R0, p);
6124 p = p + 4;
6125 if (r == 29)
6126 {
6127 p = restfpr (abfd, p, 30);
6128 p = restfpr (abfd, p, 31);
6129 }
6130 bfd_put_32 (abfd, BLR, p);
6131 return p + 4;
6132 }
6133
6134 static bfd_byte *
6135 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6136 {
6137 p = savefpr (abfd, p, r);
6138 bfd_put_32 (abfd, BLR, p);
6139 return p + 4;
6140 }
6141
6142 static bfd_byte *
6143 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6144 {
6145 p = restfpr (abfd, p, r);
6146 bfd_put_32 (abfd, BLR, p);
6147 return p + 4;
6148 }
6149
6150 static bfd_byte *
6151 savevr (bfd *abfd, bfd_byte *p, int r)
6152 {
6153 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6154 p = p + 4;
6155 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6156 return p + 4;
6157 }
6158
6159 static bfd_byte *
6160 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6161 {
6162 p = savevr (abfd, p, r);
6163 bfd_put_32 (abfd, BLR, p);
6164 return p + 4;
6165 }
6166
6167 static bfd_byte *
6168 restvr (bfd *abfd, bfd_byte *p, int r)
6169 {
6170 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6171 p = p + 4;
6172 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6173 return p + 4;
6174 }
6175
6176 static bfd_byte *
6177 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6178 {
6179 p = restvr (abfd, p, r);
6180 bfd_put_32 (abfd, BLR, p);
6181 return p + 4;
6182 }
6183
6184 /* Called via elf_link_hash_traverse to transfer dynamic linking
6185 information on function code symbol entries to their corresponding
6186 function descriptor symbol entries. */
6187
6188 static bfd_boolean
6189 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6190 {
6191 struct bfd_link_info *info;
6192 struct ppc_link_hash_table *htab;
6193 struct plt_entry *ent;
6194 struct ppc_link_hash_entry *fh;
6195 struct ppc_link_hash_entry *fdh;
6196 bfd_boolean force_local;
6197
6198 fh = (struct ppc_link_hash_entry *) h;
6199 if (fh->elf.root.type == bfd_link_hash_indirect)
6200 return TRUE;
6201
6202 info = inf;
6203 htab = ppc_hash_table (info);
6204 if (htab == NULL)
6205 return FALSE;
6206
6207 /* Resolve undefined references to dot-symbols as the value
6208 in the function descriptor, if we have one in a regular object.
6209 This is to satisfy cases like ".quad .foo". Calls to functions
6210 in dynamic objects are handled elsewhere. */
6211 if (fh->elf.root.type == bfd_link_hash_undefweak
6212 && fh->was_undefined
6213 && (fdh = defined_func_desc (fh)) != NULL
6214 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6215 && opd_entry_value (fdh->elf.root.u.def.section,
6216 fdh->elf.root.u.def.value,
6217 &fh->elf.root.u.def.section,
6218 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6219 {
6220 fh->elf.root.type = fdh->elf.root.type;
6221 fh->elf.forced_local = 1;
6222 fh->elf.def_regular = fdh->elf.def_regular;
6223 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6224 }
6225
6226 /* If this is a function code symbol, transfer dynamic linking
6227 information to the function descriptor symbol. */
6228 if (!fh->is_func)
6229 return TRUE;
6230
6231 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6232 if (ent->plt.refcount > 0)
6233 break;
6234 if (ent == NULL
6235 || fh->elf.root.root.string[0] != '.'
6236 || fh->elf.root.root.string[1] == '\0')
6237 return TRUE;
6238
6239 /* Find the corresponding function descriptor symbol. Create it
6240 as undefined if necessary. */
6241
6242 fdh = lookup_fdh (fh, htab);
6243 if (fdh == NULL
6244 && !info->executable
6245 && (fh->elf.root.type == bfd_link_hash_undefined
6246 || fh->elf.root.type == bfd_link_hash_undefweak))
6247 {
6248 fdh = make_fdh (info, fh);
6249 if (fdh == NULL)
6250 return FALSE;
6251 }
6252
6253 /* Fake function descriptors are made undefweak. If the function
6254 code symbol is strong undefined, make the fake sym the same.
6255 If the function code symbol is defined, then force the fake
6256 descriptor local; We can't support overriding of symbols in a
6257 shared library on a fake descriptor. */
6258
6259 if (fdh != NULL
6260 && fdh->fake
6261 && fdh->elf.root.type == bfd_link_hash_undefweak)
6262 {
6263 if (fh->elf.root.type == bfd_link_hash_undefined)
6264 {
6265 fdh->elf.root.type = bfd_link_hash_undefined;
6266 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6267 }
6268 else if (fh->elf.root.type == bfd_link_hash_defined
6269 || fh->elf.root.type == bfd_link_hash_defweak)
6270 {
6271 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6272 }
6273 }
6274
6275 if (fdh != NULL
6276 && !fdh->elf.forced_local
6277 && (!info->executable
6278 || fdh->elf.def_dynamic
6279 || fdh->elf.ref_dynamic
6280 || (fdh->elf.root.type == bfd_link_hash_undefweak
6281 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6282 {
6283 if (fdh->elf.dynindx == -1)
6284 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6285 return FALSE;
6286 fdh->elf.ref_regular |= fh->elf.ref_regular;
6287 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6288 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6289 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6290 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6291 {
6292 move_plt_plist (fh, fdh);
6293 fdh->elf.needs_plt = 1;
6294 }
6295 fdh->is_func_descriptor = 1;
6296 fdh->oh = fh;
6297 fh->oh = fdh;
6298 }
6299
6300 /* Now that the info is on the function descriptor, clear the
6301 function code sym info. Any function code syms for which we
6302 don't have a definition in a regular file, we force local.
6303 This prevents a shared library from exporting syms that have
6304 been imported from another library. Function code syms that
6305 are really in the library we must leave global to prevent the
6306 linker dragging in a definition from a static library. */
6307 force_local = (!fh->elf.def_regular
6308 || fdh == NULL
6309 || !fdh->elf.def_regular
6310 || fdh->elf.forced_local);
6311 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6312
6313 return TRUE;
6314 }
6315
6316 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6317 this hook to a) provide some gcc support functions, and b) transfer
6318 dynamic linking information gathered so far on function code symbol
6319 entries, to their corresponding function descriptor symbol entries. */
6320
6321 static bfd_boolean
6322 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6323 struct bfd_link_info *info)
6324 {
6325 struct ppc_link_hash_table *htab;
6326 unsigned int i;
6327 const struct sfpr_def_parms funcs[] =
6328 {
6329 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6330 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6331 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6332 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6333 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6334 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6335 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6336 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6337 { "._savef", 14, 31, savefpr, savefpr1_tail },
6338 { "._restf", 14, 31, restfpr, restfpr1_tail },
6339 { "_savevr_", 20, 31, savevr, savevr_tail },
6340 { "_restvr_", 20, 31, restvr, restvr_tail }
6341 };
6342
6343 htab = ppc_hash_table (info);
6344 if (htab == NULL)
6345 return FALSE;
6346
6347 if (htab->sfpr == NULL)
6348 /* We don't have any relocs. */
6349 return TRUE;
6350
6351 /* Provide any missing _save* and _rest* functions. */
6352 htab->sfpr->size = 0;
6353 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6354 if (!sfpr_define (info, &funcs[i]))
6355 return FALSE;
6356
6357 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6358
6359 if (htab->sfpr->size == 0)
6360 htab->sfpr->flags |= SEC_EXCLUDE;
6361
6362 return TRUE;
6363 }
6364
6365 /* Adjust a symbol defined by a dynamic object and referenced by a
6366 regular object. The current definition is in some section of the
6367 dynamic object, but we're not including those sections. We have to
6368 change the definition to something the rest of the link can
6369 understand. */
6370
6371 static bfd_boolean
6372 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6373 struct elf_link_hash_entry *h)
6374 {
6375 struct ppc_link_hash_table *htab;
6376 asection *s;
6377
6378 htab = ppc_hash_table (info);
6379 if (htab == NULL)
6380 return FALSE;
6381
6382 /* Deal with function syms. */
6383 if (h->type == STT_FUNC
6384 || h->type == STT_GNU_IFUNC
6385 || h->needs_plt)
6386 {
6387 /* Clear procedure linkage table information for any symbol that
6388 won't need a .plt entry. */
6389 struct plt_entry *ent;
6390 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6391 if (ent->plt.refcount > 0)
6392 break;
6393 if (ent == NULL
6394 || (h->type != STT_GNU_IFUNC
6395 && (SYMBOL_CALLS_LOCAL (info, h)
6396 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6397 && h->root.type == bfd_link_hash_undefweak))))
6398 {
6399 h->plt.plist = NULL;
6400 h->needs_plt = 0;
6401 }
6402 }
6403 else
6404 h->plt.plist = NULL;
6405
6406 /* If this is a weak symbol, and there is a real definition, the
6407 processor independent code will have arranged for us to see the
6408 real definition first, and we can just use the same value. */
6409 if (h->u.weakdef != NULL)
6410 {
6411 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6412 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6413 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6414 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6415 if (ELIMINATE_COPY_RELOCS)
6416 h->non_got_ref = h->u.weakdef->non_got_ref;
6417 return TRUE;
6418 }
6419
6420 /* If we are creating a shared library, we must presume that the
6421 only references to the symbol are via the global offset table.
6422 For such cases we need not do anything here; the relocations will
6423 be handled correctly by relocate_section. */
6424 if (info->shared)
6425 return TRUE;
6426
6427 /* If there are no references to this symbol that do not use the
6428 GOT, we don't need to generate a copy reloc. */
6429 if (!h->non_got_ref)
6430 return TRUE;
6431
6432 /* Don't generate a copy reloc for symbols defined in the executable. */
6433 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6434 return TRUE;
6435
6436 if (ELIMINATE_COPY_RELOCS)
6437 {
6438 struct ppc_link_hash_entry * eh;
6439 struct elf_dyn_relocs *p;
6440
6441 eh = (struct ppc_link_hash_entry *) h;
6442 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6443 {
6444 s = p->sec->output_section;
6445 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6446 break;
6447 }
6448
6449 /* If we didn't find any dynamic relocs in read-only sections, then
6450 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6451 if (p == NULL)
6452 {
6453 h->non_got_ref = 0;
6454 return TRUE;
6455 }
6456 }
6457
6458 if (h->plt.plist != NULL)
6459 {
6460 /* We should never get here, but unfortunately there are versions
6461 of gcc out there that improperly (for this ABI) put initialized
6462 function pointers, vtable refs and suchlike in read-only
6463 sections. Allow them to proceed, but warn that this might
6464 break at runtime. */
6465 info->callbacks->einfo
6466 (_("copy reloc against `%s' requires lazy plt linking; "
6467 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6468 h->root.root.string);
6469 }
6470
6471 /* This is a reference to a symbol defined by a dynamic object which
6472 is not a function. */
6473
6474 if (h->size == 0)
6475 {
6476 info->callbacks->einfo (_("dynamic variable `%s' is zero size\n"),
6477 h->root.root.string);
6478 return TRUE;
6479 }
6480
6481 /* We must allocate the symbol in our .dynbss section, which will
6482 become part of the .bss section of the executable. There will be
6483 an entry for this symbol in the .dynsym section. The dynamic
6484 object will contain position independent code, so all references
6485 from the dynamic object to this symbol will go through the global
6486 offset table. The dynamic linker will use the .dynsym entry to
6487 determine the address it must put in the global offset table, so
6488 both the dynamic object and the regular object will refer to the
6489 same memory location for the variable. */
6490
6491 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6492 to copy the initial value out of the dynamic object and into the
6493 runtime process image. We need to remember the offset into the
6494 .rela.bss section we are going to use. */
6495 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6496 {
6497 htab->relbss->size += sizeof (Elf64_External_Rela);
6498 h->needs_copy = 1;
6499 }
6500
6501 s = htab->dynbss;
6502
6503 return _bfd_elf_adjust_dynamic_copy (h, s);
6504 }
6505
6506 /* If given a function descriptor symbol, hide both the function code
6507 sym and the descriptor. */
6508 static void
6509 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6510 struct elf_link_hash_entry *h,
6511 bfd_boolean force_local)
6512 {
6513 struct ppc_link_hash_entry *eh;
6514 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6515
6516 eh = (struct ppc_link_hash_entry *) h;
6517 if (eh->is_func_descriptor)
6518 {
6519 struct ppc_link_hash_entry *fh = eh->oh;
6520
6521 if (fh == NULL)
6522 {
6523 const char *p, *q;
6524 struct ppc_link_hash_table *htab;
6525 char save;
6526
6527 /* We aren't supposed to use alloca in BFD because on
6528 systems which do not have alloca the version in libiberty
6529 calls xmalloc, which might cause the program to crash
6530 when it runs out of memory. This function doesn't have a
6531 return status, so there's no way to gracefully return an
6532 error. So cheat. We know that string[-1] can be safely
6533 accessed; It's either a string in an ELF string table,
6534 or allocated in an objalloc structure. */
6535
6536 p = eh->elf.root.root.string - 1;
6537 save = *p;
6538 *(char *) p = '.';
6539 htab = ppc_hash_table (info);
6540 if (htab == NULL)
6541 return;
6542
6543 fh = (struct ppc_link_hash_entry *)
6544 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6545 *(char *) p = save;
6546
6547 /* Unfortunately, if it so happens that the string we were
6548 looking for was allocated immediately before this string,
6549 then we overwrote the string terminator. That's the only
6550 reason the lookup should fail. */
6551 if (fh == NULL)
6552 {
6553 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6554 while (q >= eh->elf.root.root.string && *q == *p)
6555 --q, --p;
6556 if (q < eh->elf.root.root.string && *p == '.')
6557 fh = (struct ppc_link_hash_entry *)
6558 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6559 }
6560 if (fh != NULL)
6561 {
6562 eh->oh = fh;
6563 fh->oh = eh;
6564 }
6565 }
6566 if (fh != NULL)
6567 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6568 }
6569 }
6570
6571 static bfd_boolean
6572 get_sym_h (struct elf_link_hash_entry **hp,
6573 Elf_Internal_Sym **symp,
6574 asection **symsecp,
6575 unsigned char **tls_maskp,
6576 Elf_Internal_Sym **locsymsp,
6577 unsigned long r_symndx,
6578 bfd *ibfd)
6579 {
6580 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6581
6582 if (r_symndx >= symtab_hdr->sh_info)
6583 {
6584 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6585 struct elf_link_hash_entry *h;
6586
6587 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6588 h = elf_follow_link (h);
6589
6590 if (hp != NULL)
6591 *hp = h;
6592
6593 if (symp != NULL)
6594 *symp = NULL;
6595
6596 if (symsecp != NULL)
6597 {
6598 asection *symsec = NULL;
6599 if (h->root.type == bfd_link_hash_defined
6600 || h->root.type == bfd_link_hash_defweak)
6601 symsec = h->root.u.def.section;
6602 *symsecp = symsec;
6603 }
6604
6605 if (tls_maskp != NULL)
6606 {
6607 struct ppc_link_hash_entry *eh;
6608
6609 eh = (struct ppc_link_hash_entry *) h;
6610 *tls_maskp = &eh->tls_mask;
6611 }
6612 }
6613 else
6614 {
6615 Elf_Internal_Sym *sym;
6616 Elf_Internal_Sym *locsyms = *locsymsp;
6617
6618 if (locsyms == NULL)
6619 {
6620 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6621 if (locsyms == NULL)
6622 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6623 symtab_hdr->sh_info,
6624 0, NULL, NULL, NULL);
6625 if (locsyms == NULL)
6626 return FALSE;
6627 *locsymsp = locsyms;
6628 }
6629 sym = locsyms + r_symndx;
6630
6631 if (hp != NULL)
6632 *hp = NULL;
6633
6634 if (symp != NULL)
6635 *symp = sym;
6636
6637 if (symsecp != NULL)
6638 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6639
6640 if (tls_maskp != NULL)
6641 {
6642 struct got_entry **lgot_ents;
6643 unsigned char *tls_mask;
6644
6645 tls_mask = NULL;
6646 lgot_ents = elf_local_got_ents (ibfd);
6647 if (lgot_ents != NULL)
6648 {
6649 struct plt_entry **local_plt = (struct plt_entry **)
6650 (lgot_ents + symtab_hdr->sh_info);
6651 unsigned char *lgot_masks = (unsigned char *)
6652 (local_plt + symtab_hdr->sh_info);
6653 tls_mask = &lgot_masks[r_symndx];
6654 }
6655 *tls_maskp = tls_mask;
6656 }
6657 }
6658 return TRUE;
6659 }
6660
6661 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6662 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6663 type suitable for optimization, and 1 otherwise. */
6664
6665 static int
6666 get_tls_mask (unsigned char **tls_maskp,
6667 unsigned long *toc_symndx,
6668 bfd_vma *toc_addend,
6669 Elf_Internal_Sym **locsymsp,
6670 const Elf_Internal_Rela *rel,
6671 bfd *ibfd)
6672 {
6673 unsigned long r_symndx;
6674 int next_r;
6675 struct elf_link_hash_entry *h;
6676 Elf_Internal_Sym *sym;
6677 asection *sec;
6678 bfd_vma off;
6679
6680 r_symndx = ELF64_R_SYM (rel->r_info);
6681 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6682 return 0;
6683
6684 if ((*tls_maskp != NULL && **tls_maskp != 0)
6685 || sec == NULL
6686 || ppc64_elf_section_data (sec) == NULL
6687 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6688 return 1;
6689
6690 /* Look inside a TOC section too. */
6691 if (h != NULL)
6692 {
6693 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6694 off = h->root.u.def.value;
6695 }
6696 else
6697 off = sym->st_value;
6698 off += rel->r_addend;
6699 BFD_ASSERT (off % 8 == 0);
6700 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6701 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6702 if (toc_symndx != NULL)
6703 *toc_symndx = r_symndx;
6704 if (toc_addend != NULL)
6705 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6706 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6707 return 0;
6708 if ((h == NULL || is_static_defined (h))
6709 && (next_r == -1 || next_r == -2))
6710 return 1 - next_r;
6711 return 1;
6712 }
6713
6714 /* Adjust all global syms defined in opd sections. In gcc generated
6715 code for the old ABI, these will already have been done. */
6716
6717 static bfd_boolean
6718 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6719 {
6720 struct ppc_link_hash_entry *eh;
6721 asection *sym_sec;
6722 struct _opd_sec_data *opd;
6723
6724 if (h->root.type == bfd_link_hash_indirect)
6725 return TRUE;
6726
6727 if (h->root.type != bfd_link_hash_defined
6728 && h->root.type != bfd_link_hash_defweak)
6729 return TRUE;
6730
6731 eh = (struct ppc_link_hash_entry *) h;
6732 if (eh->adjust_done)
6733 return TRUE;
6734
6735 sym_sec = eh->elf.root.u.def.section;
6736 opd = get_opd_info (sym_sec);
6737 if (opd != NULL && opd->adjust != NULL)
6738 {
6739 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6740 if (adjust == -1)
6741 {
6742 /* This entry has been deleted. */
6743 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6744 if (dsec == NULL)
6745 {
6746 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6747 if (elf_discarded_section (dsec))
6748 {
6749 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6750 break;
6751 }
6752 }
6753 eh->elf.root.u.def.value = 0;
6754 eh->elf.root.u.def.section = dsec;
6755 }
6756 else
6757 eh->elf.root.u.def.value += adjust;
6758 eh->adjust_done = 1;
6759 }
6760 return TRUE;
6761 }
6762
6763 /* Handles decrementing dynamic reloc counts for the reloc specified by
6764 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6765 have already been determined. */
6766
6767 static bfd_boolean
6768 dec_dynrel_count (bfd_vma r_info,
6769 asection *sec,
6770 struct bfd_link_info *info,
6771 Elf_Internal_Sym **local_syms,
6772 struct elf_link_hash_entry *h,
6773 asection *sym_sec)
6774 {
6775 enum elf_ppc64_reloc_type r_type;
6776 struct elf_dyn_relocs *p;
6777 struct elf_dyn_relocs **pp;
6778
6779 /* Can this reloc be dynamic? This switch, and later tests here
6780 should be kept in sync with the code in check_relocs. */
6781 r_type = ELF64_R_TYPE (r_info);
6782 switch (r_type)
6783 {
6784 default:
6785 return TRUE;
6786
6787 case R_PPC64_TPREL16:
6788 case R_PPC64_TPREL16_LO:
6789 case R_PPC64_TPREL16_HI:
6790 case R_PPC64_TPREL16_HA:
6791 case R_PPC64_TPREL16_DS:
6792 case R_PPC64_TPREL16_LO_DS:
6793 case R_PPC64_TPREL16_HIGHER:
6794 case R_PPC64_TPREL16_HIGHERA:
6795 case R_PPC64_TPREL16_HIGHEST:
6796 case R_PPC64_TPREL16_HIGHESTA:
6797 if (!info->shared)
6798 return TRUE;
6799
6800 case R_PPC64_TPREL64:
6801 case R_PPC64_DTPMOD64:
6802 case R_PPC64_DTPREL64:
6803 case R_PPC64_ADDR64:
6804 case R_PPC64_REL30:
6805 case R_PPC64_REL32:
6806 case R_PPC64_REL64:
6807 case R_PPC64_ADDR14:
6808 case R_PPC64_ADDR14_BRNTAKEN:
6809 case R_PPC64_ADDR14_BRTAKEN:
6810 case R_PPC64_ADDR16:
6811 case R_PPC64_ADDR16_DS:
6812 case R_PPC64_ADDR16_HA:
6813 case R_PPC64_ADDR16_HI:
6814 case R_PPC64_ADDR16_HIGHER:
6815 case R_PPC64_ADDR16_HIGHERA:
6816 case R_PPC64_ADDR16_HIGHEST:
6817 case R_PPC64_ADDR16_HIGHESTA:
6818 case R_PPC64_ADDR16_LO:
6819 case R_PPC64_ADDR16_LO_DS:
6820 case R_PPC64_ADDR24:
6821 case R_PPC64_ADDR32:
6822 case R_PPC64_UADDR16:
6823 case R_PPC64_UADDR32:
6824 case R_PPC64_UADDR64:
6825 case R_PPC64_TOC:
6826 break;
6827 }
6828
6829 if (local_syms != NULL)
6830 {
6831 unsigned long r_symndx;
6832 Elf_Internal_Sym *sym;
6833 bfd *ibfd = sec->owner;
6834
6835 r_symndx = ELF64_R_SYM (r_info);
6836 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6837 return FALSE;
6838 }
6839
6840 if ((info->shared
6841 && (must_be_dyn_reloc (info, r_type)
6842 || (h != NULL
6843 && (!info->symbolic
6844 || h->root.type == bfd_link_hash_defweak
6845 || !h->def_regular))))
6846 || (ELIMINATE_COPY_RELOCS
6847 && !info->shared
6848 && h != NULL
6849 && (h->root.type == bfd_link_hash_defweak
6850 || !h->def_regular)))
6851 ;
6852 else
6853 return TRUE;
6854
6855 if (h != NULL)
6856 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6857 else
6858 {
6859 if (sym_sec != NULL)
6860 {
6861 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6862 pp = (struct elf_dyn_relocs **) vpp;
6863 }
6864 else
6865 {
6866 void *vpp = &elf_section_data (sec)->local_dynrel;
6867 pp = (struct elf_dyn_relocs **) vpp;
6868 }
6869
6870 /* elf_gc_sweep may have already removed all dyn relocs associated
6871 with local syms for a given section. Don't report a dynreloc
6872 miscount. */
6873 if (*pp == NULL)
6874 return TRUE;
6875 }
6876
6877 while ((p = *pp) != NULL)
6878 {
6879 if (p->sec == sec)
6880 {
6881 if (!must_be_dyn_reloc (info, r_type))
6882 p->pc_count -= 1;
6883 p->count -= 1;
6884 if (p->count == 0)
6885 *pp = p->next;
6886 return TRUE;
6887 }
6888 pp = &p->next;
6889 }
6890
6891 info->callbacks->einfo (_("dynreloc miscount for %B, section %A\n"),
6892 sec->owner, sec);
6893 bfd_set_error (bfd_error_bad_value);
6894 return FALSE;
6895 }
6896
6897 /* Remove unused Official Procedure Descriptor entries. Currently we
6898 only remove those associated with functions in discarded link-once
6899 sections, or weakly defined functions that have been overridden. It
6900 would be possible to remove many more entries for statically linked
6901 applications. */
6902
6903 bfd_boolean
6904 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6905 {
6906 bfd *ibfd;
6907 bfd_boolean some_edited = FALSE;
6908 asection *need_pad = NULL;
6909
6910 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6911 {
6912 asection *sec;
6913 Elf_Internal_Rela *relstart, *rel, *relend;
6914 Elf_Internal_Shdr *symtab_hdr;
6915 Elf_Internal_Sym *local_syms;
6916 bfd_vma offset;
6917 struct _opd_sec_data *opd;
6918 bfd_boolean need_edit, add_aux_fields;
6919 bfd_size_type cnt_16b = 0;
6920
6921 if (!is_ppc64_elf (ibfd))
6922 continue;
6923
6924 sec = bfd_get_section_by_name (ibfd, ".opd");
6925 if (sec == NULL || sec->size == 0)
6926 continue;
6927
6928 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6929 continue;
6930
6931 if (sec->output_section == bfd_abs_section_ptr)
6932 continue;
6933
6934 /* Look through the section relocs. */
6935 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6936 continue;
6937
6938 local_syms = NULL;
6939 symtab_hdr = &elf_symtab_hdr (ibfd);
6940
6941 /* Read the relocations. */
6942 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6943 info->keep_memory);
6944 if (relstart == NULL)
6945 return FALSE;
6946
6947 /* First run through the relocs to check they are sane, and to
6948 determine whether we need to edit this opd section. */
6949 need_edit = FALSE;
6950 need_pad = sec;
6951 offset = 0;
6952 relend = relstart + sec->reloc_count;
6953 for (rel = relstart; rel < relend; )
6954 {
6955 enum elf_ppc64_reloc_type r_type;
6956 unsigned long r_symndx;
6957 asection *sym_sec;
6958 struct elf_link_hash_entry *h;
6959 Elf_Internal_Sym *sym;
6960
6961 /* .opd contains a regular array of 16 or 24 byte entries. We're
6962 only interested in the reloc pointing to a function entry
6963 point. */
6964 if (rel->r_offset != offset
6965 || rel + 1 >= relend
6966 || (rel + 1)->r_offset != offset + 8)
6967 {
6968 /* If someone messes with .opd alignment then after a
6969 "ld -r" we might have padding in the middle of .opd.
6970 Also, there's nothing to prevent someone putting
6971 something silly in .opd with the assembler. No .opd
6972 optimization for them! */
6973 broken_opd:
6974 (*_bfd_error_handler)
6975 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6976 need_edit = FALSE;
6977 break;
6978 }
6979
6980 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6981 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6982 {
6983 (*_bfd_error_handler)
6984 (_("%B: unexpected reloc type %u in .opd section"),
6985 ibfd, r_type);
6986 need_edit = FALSE;
6987 break;
6988 }
6989
6990 r_symndx = ELF64_R_SYM (rel->r_info);
6991 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6992 r_symndx, ibfd))
6993 goto error_ret;
6994
6995 if (sym_sec == NULL || sym_sec->owner == NULL)
6996 {
6997 const char *sym_name;
6998 if (h != NULL)
6999 sym_name = h->root.root.string;
7000 else
7001 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7002 sym_sec);
7003
7004 (*_bfd_error_handler)
7005 (_("%B: undefined sym `%s' in .opd section"),
7006 ibfd, sym_name);
7007 need_edit = FALSE;
7008 break;
7009 }
7010
7011 /* opd entries are always for functions defined in the
7012 current input bfd. If the symbol isn't defined in the
7013 input bfd, then we won't be using the function in this
7014 bfd; It must be defined in a linkonce section in another
7015 bfd, or is weak. It's also possible that we are
7016 discarding the function due to a linker script /DISCARD/,
7017 which we test for via the output_section. */
7018 if (sym_sec->owner != ibfd
7019 || sym_sec->output_section == bfd_abs_section_ptr)
7020 need_edit = TRUE;
7021
7022 rel += 2;
7023 if (rel == relend
7024 || (rel + 1 == relend && rel->r_offset == offset + 16))
7025 {
7026 if (sec->size == offset + 24)
7027 {
7028 need_pad = NULL;
7029 break;
7030 }
7031 if (rel == relend && sec->size == offset + 16)
7032 {
7033 cnt_16b++;
7034 break;
7035 }
7036 goto broken_opd;
7037 }
7038
7039 if (rel->r_offset == offset + 24)
7040 offset += 24;
7041 else if (rel->r_offset != offset + 16)
7042 goto broken_opd;
7043 else if (rel + 1 < relend
7044 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7045 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7046 {
7047 offset += 16;
7048 cnt_16b++;
7049 }
7050 else if (rel + 2 < relend
7051 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7052 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7053 {
7054 offset += 24;
7055 rel += 1;
7056 }
7057 else
7058 goto broken_opd;
7059 }
7060
7061 add_aux_fields = non_overlapping && cnt_16b > 0;
7062
7063 if (need_edit || add_aux_fields)
7064 {
7065 Elf_Internal_Rela *write_rel;
7066 Elf_Internal_Shdr *rel_hdr;
7067 bfd_byte *rptr, *wptr;
7068 bfd_byte *new_contents;
7069 bfd_boolean skip;
7070 long opd_ent_size;
7071 bfd_size_type amt;
7072
7073 new_contents = NULL;
7074 amt = sec->size * sizeof (long) / 8;
7075 opd = &ppc64_elf_section_data (sec)->u.opd;
7076 opd->adjust = bfd_zalloc (sec->owner, amt);
7077 if (opd->adjust == NULL)
7078 return FALSE;
7079 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7080
7081 /* This seems a waste of time as input .opd sections are all
7082 zeros as generated by gcc, but I suppose there's no reason
7083 this will always be so. We might start putting something in
7084 the third word of .opd entries. */
7085 if ((sec->flags & SEC_IN_MEMORY) == 0)
7086 {
7087 bfd_byte *loc;
7088 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7089 {
7090 if (loc != NULL)
7091 free (loc);
7092 error_ret:
7093 if (local_syms != NULL
7094 && symtab_hdr->contents != (unsigned char *) local_syms)
7095 free (local_syms);
7096 if (elf_section_data (sec)->relocs != relstart)
7097 free (relstart);
7098 return FALSE;
7099 }
7100 sec->contents = loc;
7101 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7102 }
7103
7104 elf_section_data (sec)->relocs = relstart;
7105
7106 new_contents = sec->contents;
7107 if (add_aux_fields)
7108 {
7109 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7110 if (new_contents == NULL)
7111 return FALSE;
7112 need_pad = FALSE;
7113 }
7114 wptr = new_contents;
7115 rptr = sec->contents;
7116
7117 write_rel = relstart;
7118 skip = FALSE;
7119 offset = 0;
7120 opd_ent_size = 0;
7121 for (rel = relstart; rel < relend; rel++)
7122 {
7123 unsigned long r_symndx;
7124 asection *sym_sec;
7125 struct elf_link_hash_entry *h;
7126 Elf_Internal_Sym *sym;
7127
7128 r_symndx = ELF64_R_SYM (rel->r_info);
7129 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7130 r_symndx, ibfd))
7131 goto error_ret;
7132
7133 if (rel->r_offset == offset)
7134 {
7135 struct ppc_link_hash_entry *fdh = NULL;
7136
7137 /* See if the .opd entry is full 24 byte or
7138 16 byte (with fd_aux entry overlapped with next
7139 fd_func). */
7140 opd_ent_size = 24;
7141 if ((rel + 2 == relend && sec->size == offset + 16)
7142 || (rel + 3 < relend
7143 && rel[2].r_offset == offset + 16
7144 && rel[3].r_offset == offset + 24
7145 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7146 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7147 opd_ent_size = 16;
7148
7149 if (h != NULL
7150 && h->root.root.string[0] == '.')
7151 {
7152 struct ppc_link_hash_table *htab;
7153
7154 htab = ppc_hash_table (info);
7155 if (htab != NULL)
7156 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7157 htab);
7158 if (fdh != NULL
7159 && fdh->elf.root.type != bfd_link_hash_defined
7160 && fdh->elf.root.type != bfd_link_hash_defweak)
7161 fdh = NULL;
7162 }
7163
7164 skip = (sym_sec->owner != ibfd
7165 || sym_sec->output_section == bfd_abs_section_ptr);
7166 if (skip)
7167 {
7168 if (fdh != NULL && sym_sec->owner == ibfd)
7169 {
7170 /* Arrange for the function descriptor sym
7171 to be dropped. */
7172 fdh->elf.root.u.def.value = 0;
7173 fdh->elf.root.u.def.section = sym_sec;
7174 }
7175 opd->adjust[rel->r_offset / 8] = -1;
7176 }
7177 else
7178 {
7179 /* We'll be keeping this opd entry. */
7180
7181 if (fdh != NULL)
7182 {
7183 /* Redefine the function descriptor symbol to
7184 this location in the opd section. It is
7185 necessary to update the value here rather
7186 than using an array of adjustments as we do
7187 for local symbols, because various places
7188 in the generic ELF code use the value
7189 stored in u.def.value. */
7190 fdh->elf.root.u.def.value = wptr - new_contents;
7191 fdh->adjust_done = 1;
7192 }
7193
7194 /* Local syms are a bit tricky. We could
7195 tweak them as they can be cached, but
7196 we'd need to look through the local syms
7197 for the function descriptor sym which we
7198 don't have at the moment. So keep an
7199 array of adjustments. */
7200 opd->adjust[rel->r_offset / 8]
7201 = (wptr - new_contents) - (rptr - sec->contents);
7202
7203 if (wptr != rptr)
7204 memcpy (wptr, rptr, opd_ent_size);
7205 wptr += opd_ent_size;
7206 if (add_aux_fields && opd_ent_size == 16)
7207 {
7208 memset (wptr, '\0', 8);
7209 wptr += 8;
7210 }
7211 }
7212 rptr += opd_ent_size;
7213 offset += opd_ent_size;
7214 }
7215
7216 if (skip)
7217 {
7218 if (!NO_OPD_RELOCS
7219 && !info->relocatable
7220 && !dec_dynrel_count (rel->r_info, sec, info,
7221 NULL, h, sym_sec))
7222 goto error_ret;
7223 }
7224 else
7225 {
7226 /* We need to adjust any reloc offsets to point to the
7227 new opd entries. While we're at it, we may as well
7228 remove redundant relocs. */
7229 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7230 if (write_rel != rel)
7231 memcpy (write_rel, rel, sizeof (*rel));
7232 ++write_rel;
7233 }
7234 }
7235
7236 sec->size = wptr - new_contents;
7237 sec->reloc_count = write_rel - relstart;
7238 if (add_aux_fields)
7239 {
7240 free (sec->contents);
7241 sec->contents = new_contents;
7242 }
7243
7244 /* Fudge the header size too, as this is used later in
7245 elf_bfd_final_link if we are emitting relocs. */
7246 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7247 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7248 some_edited = TRUE;
7249 }
7250 else if (elf_section_data (sec)->relocs != relstart)
7251 free (relstart);
7252
7253 if (local_syms != NULL
7254 && symtab_hdr->contents != (unsigned char *) local_syms)
7255 {
7256 if (!info->keep_memory)
7257 free (local_syms);
7258 else
7259 symtab_hdr->contents = (unsigned char *) local_syms;
7260 }
7261 }
7262
7263 if (some_edited)
7264 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7265
7266 /* If we are doing a final link and the last .opd entry is just 16 byte
7267 long, add a 8 byte padding after it. */
7268 if (need_pad != NULL && !info->relocatable)
7269 {
7270 bfd_byte *p;
7271
7272 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7273 {
7274 BFD_ASSERT (need_pad->size > 0);
7275
7276 p = bfd_malloc (need_pad->size + 8);
7277 if (p == NULL)
7278 return FALSE;
7279
7280 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7281 p, 0, need_pad->size))
7282 return FALSE;
7283
7284 need_pad->contents = p;
7285 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7286 }
7287 else
7288 {
7289 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7290 if (p == NULL)
7291 return FALSE;
7292
7293 need_pad->contents = p;
7294 }
7295
7296 memset (need_pad->contents + need_pad->size, 0, 8);
7297 need_pad->size += 8;
7298 }
7299
7300 return TRUE;
7301 }
7302
7303 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7304
7305 asection *
7306 ppc64_elf_tls_setup (struct bfd_link_info *info,
7307 int no_tls_get_addr_opt,
7308 int *no_multi_toc)
7309 {
7310 struct ppc_link_hash_table *htab;
7311
7312 htab = ppc_hash_table (info);
7313 if (htab == NULL)
7314 return NULL;
7315
7316 if (*no_multi_toc)
7317 htab->do_multi_toc = 0;
7318 else if (!htab->do_multi_toc)
7319 *no_multi_toc = 1;
7320
7321 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7322 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7323 FALSE, FALSE, TRUE));
7324 /* Move dynamic linking info to the function descriptor sym. */
7325 if (htab->tls_get_addr != NULL)
7326 func_desc_adjust (&htab->tls_get_addr->elf, info);
7327 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7328 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7329 FALSE, FALSE, TRUE));
7330 if (!no_tls_get_addr_opt)
7331 {
7332 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7333
7334 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7335 FALSE, FALSE, TRUE);
7336 if (opt != NULL)
7337 func_desc_adjust (opt, info);
7338 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7339 FALSE, FALSE, TRUE);
7340 if (opt_fd != NULL
7341 && (opt_fd->root.type == bfd_link_hash_defined
7342 || opt_fd->root.type == bfd_link_hash_defweak))
7343 {
7344 /* If glibc supports an optimized __tls_get_addr call stub,
7345 signalled by the presence of __tls_get_addr_opt, and we'll
7346 be calling __tls_get_addr via a plt call stub, then
7347 make __tls_get_addr point to __tls_get_addr_opt. */
7348 tga_fd = &htab->tls_get_addr_fd->elf;
7349 if (htab->elf.dynamic_sections_created
7350 && tga_fd != NULL
7351 && (tga_fd->type == STT_FUNC
7352 || tga_fd->needs_plt)
7353 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7354 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7355 && tga_fd->root.type == bfd_link_hash_undefweak)))
7356 {
7357 struct plt_entry *ent;
7358
7359 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7360 if (ent->plt.refcount > 0)
7361 break;
7362 if (ent != NULL)
7363 {
7364 tga_fd->root.type = bfd_link_hash_indirect;
7365 tga_fd->root.u.i.link = &opt_fd->root;
7366 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7367 if (opt_fd->dynindx != -1)
7368 {
7369 /* Use __tls_get_addr_opt in dynamic relocations. */
7370 opt_fd->dynindx = -1;
7371 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7372 opt_fd->dynstr_index);
7373 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7374 return NULL;
7375 }
7376 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7377 tga = &htab->tls_get_addr->elf;
7378 if (opt != NULL && tga != NULL)
7379 {
7380 tga->root.type = bfd_link_hash_indirect;
7381 tga->root.u.i.link = &opt->root;
7382 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7383 _bfd_elf_link_hash_hide_symbol (info, opt,
7384 tga->forced_local);
7385 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7386 }
7387 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7388 htab->tls_get_addr_fd->is_func_descriptor = 1;
7389 if (htab->tls_get_addr != NULL)
7390 {
7391 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7392 htab->tls_get_addr->is_func = 1;
7393 }
7394 }
7395 }
7396 }
7397 else
7398 no_tls_get_addr_opt = TRUE;
7399 }
7400 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7401 return _bfd_elf_tls_setup (info->output_bfd, info);
7402 }
7403
7404 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7405 HASH1 or HASH2. */
7406
7407 static bfd_boolean
7408 branch_reloc_hash_match (const bfd *ibfd,
7409 const Elf_Internal_Rela *rel,
7410 const struct ppc_link_hash_entry *hash1,
7411 const struct ppc_link_hash_entry *hash2)
7412 {
7413 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7414 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7415 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7416
7417 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7418 {
7419 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7420 struct elf_link_hash_entry *h;
7421
7422 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7423 h = elf_follow_link (h);
7424 if (h == &hash1->elf || h == &hash2->elf)
7425 return TRUE;
7426 }
7427 return FALSE;
7428 }
7429
7430 /* Run through all the TLS relocs looking for optimization
7431 opportunities. The linker has been hacked (see ppc64elf.em) to do
7432 a preliminary section layout so that we know the TLS segment
7433 offsets. We can't optimize earlier because some optimizations need
7434 to know the tp offset, and we need to optimize before allocating
7435 dynamic relocations. */
7436
7437 bfd_boolean
7438 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7439 {
7440 bfd *ibfd;
7441 asection *sec;
7442 struct ppc_link_hash_table *htab;
7443 unsigned char *toc_ref;
7444 int pass;
7445
7446 if (info->relocatable || !info->executable)
7447 return TRUE;
7448
7449 htab = ppc_hash_table (info);
7450 if (htab == NULL)
7451 return FALSE;
7452
7453 /* Make two passes over the relocs. On the first pass, mark toc
7454 entries involved with tls relocs, and check that tls relocs
7455 involved in setting up a tls_get_addr call are indeed followed by
7456 such a call. If they are not, we can't do any tls optimization.
7457 On the second pass twiddle tls_mask flags to notify
7458 relocate_section that optimization can be done, and adjust got
7459 and plt refcounts. */
7460 toc_ref = NULL;
7461 for (pass = 0; pass < 2; ++pass)
7462 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7463 {
7464 Elf_Internal_Sym *locsyms = NULL;
7465 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7466
7467 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7468 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7469 {
7470 Elf_Internal_Rela *relstart, *rel, *relend;
7471 bfd_boolean found_tls_get_addr_arg = 0;
7472
7473 /* Read the relocations. */
7474 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7475 info->keep_memory);
7476 if (relstart == NULL)
7477 return FALSE;
7478
7479 relend = relstart + sec->reloc_count;
7480 for (rel = relstart; rel < relend; rel++)
7481 {
7482 enum elf_ppc64_reloc_type r_type;
7483 unsigned long r_symndx;
7484 struct elf_link_hash_entry *h;
7485 Elf_Internal_Sym *sym;
7486 asection *sym_sec;
7487 unsigned char *tls_mask;
7488 unsigned char tls_set, tls_clear, tls_type = 0;
7489 bfd_vma value;
7490 bfd_boolean ok_tprel, is_local;
7491 long toc_ref_index = 0;
7492 int expecting_tls_get_addr = 0;
7493 bfd_boolean ret = FALSE;
7494
7495 r_symndx = ELF64_R_SYM (rel->r_info);
7496 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7497 r_symndx, ibfd))
7498 {
7499 err_free_rel:
7500 if (elf_section_data (sec)->relocs != relstart)
7501 free (relstart);
7502 if (toc_ref != NULL)
7503 free (toc_ref);
7504 if (locsyms != NULL
7505 && (elf_symtab_hdr (ibfd).contents
7506 != (unsigned char *) locsyms))
7507 free (locsyms);
7508 return ret;
7509 }
7510
7511 if (h != NULL)
7512 {
7513 if (h->root.type == bfd_link_hash_defined
7514 || h->root.type == bfd_link_hash_defweak)
7515 value = h->root.u.def.value;
7516 else if (h->root.type == bfd_link_hash_undefweak)
7517 value = 0;
7518 else
7519 {
7520 found_tls_get_addr_arg = 0;
7521 continue;
7522 }
7523 }
7524 else
7525 /* Symbols referenced by TLS relocs must be of type
7526 STT_TLS. So no need for .opd local sym adjust. */
7527 value = sym->st_value;
7528
7529 ok_tprel = FALSE;
7530 is_local = FALSE;
7531 if (h == NULL
7532 || !h->def_dynamic)
7533 {
7534 is_local = TRUE;
7535 if (h != NULL
7536 && h->root.type == bfd_link_hash_undefweak)
7537 ok_tprel = TRUE;
7538 else
7539 {
7540 value += sym_sec->output_offset;
7541 value += sym_sec->output_section->vma;
7542 value -= htab->elf.tls_sec->vma;
7543 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7544 < (bfd_vma) 1 << 32);
7545 }
7546 }
7547
7548 r_type = ELF64_R_TYPE (rel->r_info);
7549 /* If this section has old-style __tls_get_addr calls
7550 without marker relocs, then check that each
7551 __tls_get_addr call reloc is preceded by a reloc
7552 that conceivably belongs to the __tls_get_addr arg
7553 setup insn. If we don't find matching arg setup
7554 relocs, don't do any tls optimization. */
7555 if (pass == 0
7556 && sec->has_tls_get_addr_call
7557 && h != NULL
7558 && (h == &htab->tls_get_addr->elf
7559 || h == &htab->tls_get_addr_fd->elf)
7560 && !found_tls_get_addr_arg
7561 && is_branch_reloc (r_type))
7562 {
7563 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7564 "TLS optimization disabled\n"),
7565 ibfd, sec, rel->r_offset);
7566 ret = TRUE;
7567 goto err_free_rel;
7568 }
7569
7570 found_tls_get_addr_arg = 0;
7571 switch (r_type)
7572 {
7573 case R_PPC64_GOT_TLSLD16:
7574 case R_PPC64_GOT_TLSLD16_LO:
7575 expecting_tls_get_addr = 1;
7576 found_tls_get_addr_arg = 1;
7577 /* Fall thru */
7578
7579 case R_PPC64_GOT_TLSLD16_HI:
7580 case R_PPC64_GOT_TLSLD16_HA:
7581 /* These relocs should never be against a symbol
7582 defined in a shared lib. Leave them alone if
7583 that turns out to be the case. */
7584 if (!is_local)
7585 continue;
7586
7587 /* LD -> LE */
7588 tls_set = 0;
7589 tls_clear = TLS_LD;
7590 tls_type = TLS_TLS | TLS_LD;
7591 break;
7592
7593 case R_PPC64_GOT_TLSGD16:
7594 case R_PPC64_GOT_TLSGD16_LO:
7595 expecting_tls_get_addr = 1;
7596 found_tls_get_addr_arg = 1;
7597 /* Fall thru */
7598
7599 case R_PPC64_GOT_TLSGD16_HI:
7600 case R_PPC64_GOT_TLSGD16_HA:
7601 if (ok_tprel)
7602 /* GD -> LE */
7603 tls_set = 0;
7604 else
7605 /* GD -> IE */
7606 tls_set = TLS_TLS | TLS_TPRELGD;
7607 tls_clear = TLS_GD;
7608 tls_type = TLS_TLS | TLS_GD;
7609 break;
7610
7611 case R_PPC64_GOT_TPREL16_DS:
7612 case R_PPC64_GOT_TPREL16_LO_DS:
7613 case R_PPC64_GOT_TPREL16_HI:
7614 case R_PPC64_GOT_TPREL16_HA:
7615 if (ok_tprel)
7616 {
7617 /* IE -> LE */
7618 tls_set = 0;
7619 tls_clear = TLS_TPREL;
7620 tls_type = TLS_TLS | TLS_TPREL;
7621 break;
7622 }
7623 continue;
7624
7625 case R_PPC64_TLSGD:
7626 case R_PPC64_TLSLD:
7627 found_tls_get_addr_arg = 1;
7628 /* Fall thru */
7629
7630 case R_PPC64_TLS:
7631 case R_PPC64_TOC16:
7632 case R_PPC64_TOC16_LO:
7633 if (sym_sec == NULL || sym_sec != toc)
7634 continue;
7635
7636 /* Mark this toc entry as referenced by a TLS
7637 code sequence. We can do that now in the
7638 case of R_PPC64_TLS, and after checking for
7639 tls_get_addr for the TOC16 relocs. */
7640 if (toc_ref == NULL)
7641 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7642 if (toc_ref == NULL)
7643 goto err_free_rel;
7644
7645 if (h != NULL)
7646 value = h->root.u.def.value;
7647 else
7648 value = sym->st_value;
7649 value += rel->r_addend;
7650 BFD_ASSERT (value < toc->size && value % 8 == 0);
7651 toc_ref_index = (value + toc->output_offset) / 8;
7652 if (r_type == R_PPC64_TLS
7653 || r_type == R_PPC64_TLSGD
7654 || r_type == R_PPC64_TLSLD)
7655 {
7656 toc_ref[toc_ref_index] = 1;
7657 continue;
7658 }
7659
7660 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7661 continue;
7662
7663 tls_set = 0;
7664 tls_clear = 0;
7665 expecting_tls_get_addr = 2;
7666 break;
7667
7668 case R_PPC64_TPREL64:
7669 if (pass == 0
7670 || sec != toc
7671 || toc_ref == NULL
7672 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7673 continue;
7674 if (ok_tprel)
7675 {
7676 /* IE -> LE */
7677 tls_set = TLS_EXPLICIT;
7678 tls_clear = TLS_TPREL;
7679 break;
7680 }
7681 continue;
7682
7683 case R_PPC64_DTPMOD64:
7684 if (pass == 0
7685 || sec != toc
7686 || toc_ref == NULL
7687 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7688 continue;
7689 if (rel + 1 < relend
7690 && (rel[1].r_info
7691 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7692 && rel[1].r_offset == rel->r_offset + 8)
7693 {
7694 if (ok_tprel)
7695 /* GD -> LE */
7696 tls_set = TLS_EXPLICIT | TLS_GD;
7697 else
7698 /* GD -> IE */
7699 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7700 tls_clear = TLS_GD;
7701 }
7702 else
7703 {
7704 if (!is_local)
7705 continue;
7706
7707 /* LD -> LE */
7708 tls_set = TLS_EXPLICIT;
7709 tls_clear = TLS_LD;
7710 }
7711 break;
7712
7713 default:
7714 continue;
7715 }
7716
7717 if (pass == 0)
7718 {
7719 if (!expecting_tls_get_addr
7720 || !sec->has_tls_get_addr_call)
7721 continue;
7722
7723 if (rel + 1 < relend
7724 && branch_reloc_hash_match (ibfd, rel + 1,
7725 htab->tls_get_addr,
7726 htab->tls_get_addr_fd))
7727 {
7728 if (expecting_tls_get_addr == 2)
7729 {
7730 /* Check for toc tls entries. */
7731 unsigned char *toc_tls;
7732 int retval;
7733
7734 retval = get_tls_mask (&toc_tls, NULL, NULL,
7735 &locsyms,
7736 rel, ibfd);
7737 if (retval == 0)
7738 goto err_free_rel;
7739 if (toc_tls != NULL)
7740 {
7741 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7742 found_tls_get_addr_arg = 1;
7743 if (retval > 1)
7744 toc_ref[toc_ref_index] = 1;
7745 }
7746 }
7747 continue;
7748 }
7749
7750 if (expecting_tls_get_addr != 1)
7751 continue;
7752
7753 /* Uh oh, we didn't find the expected call. We
7754 could just mark this symbol to exclude it
7755 from tls optimization but it's safer to skip
7756 the entire optimization. */
7757 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
7758 "TLS optimization disabled\n"),
7759 ibfd, sec, rel->r_offset);
7760 ret = TRUE;
7761 goto err_free_rel;
7762 }
7763
7764 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7765 {
7766 struct plt_entry *ent;
7767 for (ent = htab->tls_get_addr->elf.plt.plist;
7768 ent != NULL;
7769 ent = ent->next)
7770 if (ent->addend == 0)
7771 {
7772 if (ent->plt.refcount > 0)
7773 {
7774 ent->plt.refcount -= 1;
7775 expecting_tls_get_addr = 0;
7776 }
7777 break;
7778 }
7779 }
7780
7781 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7782 {
7783 struct plt_entry *ent;
7784 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7785 ent != NULL;
7786 ent = ent->next)
7787 if (ent->addend == 0)
7788 {
7789 if (ent->plt.refcount > 0)
7790 ent->plt.refcount -= 1;
7791 break;
7792 }
7793 }
7794
7795 if (tls_clear == 0)
7796 continue;
7797
7798 if ((tls_set & TLS_EXPLICIT) == 0)
7799 {
7800 struct got_entry *ent;
7801
7802 /* Adjust got entry for this reloc. */
7803 if (h != NULL)
7804 ent = h->got.glist;
7805 else
7806 ent = elf_local_got_ents (ibfd)[r_symndx];
7807
7808 for (; ent != NULL; ent = ent->next)
7809 if (ent->addend == rel->r_addend
7810 && ent->owner == ibfd
7811 && ent->tls_type == tls_type)
7812 break;
7813 if (ent == NULL)
7814 abort ();
7815
7816 if (tls_set == 0)
7817 {
7818 /* We managed to get rid of a got entry. */
7819 if (ent->got.refcount > 0)
7820 ent->got.refcount -= 1;
7821 }
7822 }
7823 else
7824 {
7825 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7826 we'll lose one or two dyn relocs. */
7827 if (!dec_dynrel_count (rel->r_info, sec, info,
7828 NULL, h, sym_sec))
7829 return FALSE;
7830
7831 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7832 {
7833 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7834 NULL, h, sym_sec))
7835 return FALSE;
7836 }
7837 }
7838
7839 *tls_mask |= tls_set;
7840 *tls_mask &= ~tls_clear;
7841 }
7842
7843 if (elf_section_data (sec)->relocs != relstart)
7844 free (relstart);
7845 }
7846
7847 if (locsyms != NULL
7848 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7849 {
7850 if (!info->keep_memory)
7851 free (locsyms);
7852 else
7853 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7854 }
7855 }
7856
7857 if (toc_ref != NULL)
7858 free (toc_ref);
7859 return TRUE;
7860 }
7861
7862 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7863 the values of any global symbols in a toc section that has been
7864 edited. Globals in toc sections should be a rarity, so this function
7865 sets a flag if any are found in toc sections other than the one just
7866 edited, so that futher hash table traversals can be avoided. */
7867
7868 struct adjust_toc_info
7869 {
7870 asection *toc;
7871 unsigned long *skip;
7872 bfd_boolean global_toc_syms;
7873 };
7874
7875 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7876
7877 static bfd_boolean
7878 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7879 {
7880 struct ppc_link_hash_entry *eh;
7881 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7882 unsigned long i;
7883
7884 if (h->root.type == bfd_link_hash_indirect)
7885 return TRUE;
7886
7887 if (h->root.type != bfd_link_hash_defined
7888 && h->root.type != bfd_link_hash_defweak)
7889 return TRUE;
7890
7891 eh = (struct ppc_link_hash_entry *) h;
7892 if (eh->adjust_done)
7893 return TRUE;
7894
7895 if (eh->elf.root.u.def.section == toc_inf->toc)
7896 {
7897 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7898 i = toc_inf->toc->rawsize >> 3;
7899 else
7900 i = eh->elf.root.u.def.value >> 3;
7901
7902 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7903 {
7904 (*_bfd_error_handler)
7905 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7906 do
7907 ++i;
7908 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7909 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7910 }
7911
7912 eh->elf.root.u.def.value -= toc_inf->skip[i];
7913 eh->adjust_done = 1;
7914 }
7915 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7916 toc_inf->global_toc_syms = TRUE;
7917
7918 return TRUE;
7919 }
7920
7921 /* Examine all relocs referencing .toc sections in order to remove
7922 unused .toc entries. */
7923
7924 bfd_boolean
7925 ppc64_elf_edit_toc (struct bfd_link_info *info)
7926 {
7927 bfd *ibfd;
7928 struct adjust_toc_info toc_inf;
7929 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7930
7931 htab->do_toc_opt = 1;
7932 toc_inf.global_toc_syms = TRUE;
7933 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7934 {
7935 asection *toc, *sec;
7936 Elf_Internal_Shdr *symtab_hdr;
7937 Elf_Internal_Sym *local_syms;
7938 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
7939 unsigned long *skip, *drop;
7940 unsigned char *used;
7941 unsigned char *keep, last, some_unused;
7942
7943 if (!is_ppc64_elf (ibfd))
7944 continue;
7945
7946 toc = bfd_get_section_by_name (ibfd, ".toc");
7947 if (toc == NULL
7948 || toc->size == 0
7949 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7950 || elf_discarded_section (toc))
7951 continue;
7952
7953 toc_relocs = NULL;
7954 local_syms = NULL;
7955 symtab_hdr = &elf_symtab_hdr (ibfd);
7956
7957 /* Look at sections dropped from the final link. */
7958 skip = NULL;
7959 relstart = NULL;
7960 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7961 {
7962 if (sec->reloc_count == 0
7963 || !elf_discarded_section (sec)
7964 || get_opd_info (sec)
7965 || (sec->flags & SEC_ALLOC) == 0
7966 || (sec->flags & SEC_DEBUGGING) != 0)
7967 continue;
7968
7969 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7970 if (relstart == NULL)
7971 goto error_ret;
7972
7973 /* Run through the relocs to see which toc entries might be
7974 unused. */
7975 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7976 {
7977 enum elf_ppc64_reloc_type r_type;
7978 unsigned long r_symndx;
7979 asection *sym_sec;
7980 struct elf_link_hash_entry *h;
7981 Elf_Internal_Sym *sym;
7982 bfd_vma val;
7983
7984 r_type = ELF64_R_TYPE (rel->r_info);
7985 switch (r_type)
7986 {
7987 default:
7988 continue;
7989
7990 case R_PPC64_TOC16:
7991 case R_PPC64_TOC16_LO:
7992 case R_PPC64_TOC16_HI:
7993 case R_PPC64_TOC16_HA:
7994 case R_PPC64_TOC16_DS:
7995 case R_PPC64_TOC16_LO_DS:
7996 break;
7997 }
7998
7999 r_symndx = ELF64_R_SYM (rel->r_info);
8000 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8001 r_symndx, ibfd))
8002 goto error_ret;
8003
8004 if (sym_sec != toc)
8005 continue;
8006
8007 if (h != NULL)
8008 val = h->root.u.def.value;
8009 else
8010 val = sym->st_value;
8011 val += rel->r_addend;
8012
8013 if (val >= toc->size)
8014 continue;
8015
8016 /* Anything in the toc ought to be aligned to 8 bytes.
8017 If not, don't mark as unused. */
8018 if (val & 7)
8019 continue;
8020
8021 if (skip == NULL)
8022 {
8023 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8024 if (skip == NULL)
8025 goto error_ret;
8026 }
8027
8028 skip[val >> 3] = ref_from_discarded;
8029 }
8030
8031 if (elf_section_data (sec)->relocs != relstart)
8032 free (relstart);
8033 }
8034
8035 /* For largetoc loads of address constants, we can convert
8036 . addis rx,2,addr@got@ha
8037 . ld ry,addr@got@l(rx)
8038 to
8039 . addis rx,2,addr@toc@ha
8040 . addi ry,rx,addr@toc@l
8041 when addr is within 2G of the toc pointer. This then means
8042 that the word storing "addr" in the toc is no longer needed. */
8043
8044 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8045 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8046 && toc->reloc_count != 0)
8047 {
8048 /* Read toc relocs. */
8049 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8050 info->keep_memory);
8051 if (toc_relocs == NULL)
8052 goto error_ret;
8053
8054 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8055 {
8056 enum elf_ppc64_reloc_type r_type;
8057 unsigned long r_symndx;
8058 asection *sym_sec;
8059 struct elf_link_hash_entry *h;
8060 Elf_Internal_Sym *sym;
8061 bfd_vma val, addr;
8062
8063 r_type = ELF64_R_TYPE (rel->r_info);
8064 if (r_type != R_PPC64_ADDR64)
8065 continue;
8066
8067 r_symndx = ELF64_R_SYM (rel->r_info);
8068 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8069 r_symndx, ibfd))
8070 goto error_ret;
8071
8072 if (sym_sec == NULL
8073 || elf_discarded_section (sym_sec))
8074 continue;
8075
8076 if (!SYMBOL_CALLS_LOCAL (info, h))
8077 continue;
8078
8079 if (h != NULL)
8080 {
8081 if (h->type == STT_GNU_IFUNC)
8082 continue;
8083 val = h->root.u.def.value;
8084 }
8085 else
8086 {
8087 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8088 continue;
8089 val = sym->st_value;
8090 }
8091 val += rel->r_addend;
8092 val += sym_sec->output_section->vma + sym_sec->output_offset;
8093
8094 /* We don't yet know the exact toc pointer value, but we
8095 know it will be somewhere in the toc section. Don't
8096 optimize if the difference from any possible toc
8097 pointer is outside [ff..f80008000, 7fff7fff]. */
8098 addr = toc->output_section->vma + TOC_BASE_OFF;
8099 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8100 continue;
8101
8102 addr = toc->output_section->vma + toc->output_section->rawsize;
8103 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8104 continue;
8105
8106 if (skip == NULL)
8107 {
8108 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8109 if (skip == NULL)
8110 goto error_ret;
8111 }
8112
8113 skip[rel->r_offset >> 3]
8114 |= can_optimize | ((rel - toc_relocs) << 2);
8115 }
8116 }
8117
8118 if (skip == NULL)
8119 continue;
8120
8121 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8122 if (used == NULL)
8123 {
8124 error_ret:
8125 if (local_syms != NULL
8126 && symtab_hdr->contents != (unsigned char *) local_syms)
8127 free (local_syms);
8128 if (sec != NULL
8129 && relstart != NULL
8130 && elf_section_data (sec)->relocs != relstart)
8131 free (relstart);
8132 if (toc_relocs != NULL
8133 && elf_section_data (toc)->relocs != toc_relocs)
8134 free (toc_relocs);
8135 if (skip != NULL)
8136 free (skip);
8137 return FALSE;
8138 }
8139
8140 /* Now check all kept sections that might reference the toc.
8141 Check the toc itself last. */
8142 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8143 : ibfd->sections);
8144 sec != NULL;
8145 sec = (sec == toc ? NULL
8146 : sec->next == NULL ? toc
8147 : sec->next == toc && toc->next ? toc->next
8148 : sec->next))
8149 {
8150 int repeat;
8151
8152 if (sec->reloc_count == 0
8153 || elf_discarded_section (sec)
8154 || get_opd_info (sec)
8155 || (sec->flags & SEC_ALLOC) == 0
8156 || (sec->flags & SEC_DEBUGGING) != 0)
8157 continue;
8158
8159 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8160 info->keep_memory);
8161 if (relstart == NULL)
8162 goto error_ret;
8163
8164 /* Mark toc entries referenced as used. */
8165 repeat = 0;
8166 do
8167 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8168 {
8169 enum elf_ppc64_reloc_type r_type;
8170 unsigned long r_symndx;
8171 asection *sym_sec;
8172 struct elf_link_hash_entry *h;
8173 Elf_Internal_Sym *sym;
8174 bfd_vma val;
8175
8176 r_type = ELF64_R_TYPE (rel->r_info);
8177 switch (r_type)
8178 {
8179 case R_PPC64_TOC16:
8180 case R_PPC64_TOC16_LO:
8181 case R_PPC64_TOC16_HI:
8182 case R_PPC64_TOC16_HA:
8183 case R_PPC64_TOC16_DS:
8184 case R_PPC64_TOC16_LO_DS:
8185 /* In case we're taking addresses of toc entries. */
8186 case R_PPC64_ADDR64:
8187 break;
8188
8189 default:
8190 continue;
8191 }
8192
8193 r_symndx = ELF64_R_SYM (rel->r_info);
8194 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8195 r_symndx, ibfd))
8196 {
8197 free (used);
8198 goto error_ret;
8199 }
8200
8201 if (sym_sec != toc)
8202 continue;
8203
8204 if (h != NULL)
8205 val = h->root.u.def.value;
8206 else
8207 val = sym->st_value;
8208 val += rel->r_addend;
8209
8210 if (val >= toc->size)
8211 continue;
8212
8213 if ((skip[val >> 3] & can_optimize) != 0)
8214 {
8215 bfd_vma off;
8216 unsigned char opc;
8217
8218 switch (r_type)
8219 {
8220 case R_PPC64_TOC16_HA:
8221 break;
8222
8223 case R_PPC64_TOC16_LO_DS:
8224 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8225 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8226 return FALSE;
8227 if ((opc & (0x3f << 2)) == (58u << 2))
8228 break;
8229 /* Fall thru */
8230
8231 default:
8232 /* Wrong sort of reloc, or not a ld. We may
8233 as well clear ref_from_discarded too. */
8234 skip[val >> 3] = 0;
8235 }
8236 }
8237
8238 /* For the toc section, we only mark as used if
8239 this entry itself isn't unused. */
8240 if (sec == toc
8241 && !used[val >> 3]
8242 && (used[rel->r_offset >> 3]
8243 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8244 /* Do all the relocs again, to catch reference
8245 chains. */
8246 repeat = 1;
8247
8248 used[val >> 3] = 1;
8249 }
8250 while (repeat);
8251
8252 if (elf_section_data (sec)->relocs != relstart)
8253 free (relstart);
8254 }
8255
8256 /* Merge the used and skip arrays. Assume that TOC
8257 doublewords not appearing as either used or unused belong
8258 to to an entry more than one doubleword in size. */
8259 for (drop = skip, keep = used, last = 0, some_unused = 0;
8260 drop < skip + (toc->size + 7) / 8;
8261 ++drop, ++keep)
8262 {
8263 if (*keep)
8264 {
8265 *drop &= ~ref_from_discarded;
8266 if ((*drop & can_optimize) != 0)
8267 some_unused = 1;
8268 last = 0;
8269 }
8270 else if (*drop)
8271 {
8272 some_unused = 1;
8273 last = ref_from_discarded;
8274 }
8275 else
8276 *drop = last;
8277 }
8278
8279 free (used);
8280
8281 if (some_unused)
8282 {
8283 bfd_byte *contents, *src;
8284 unsigned long off;
8285 Elf_Internal_Sym *sym;
8286 bfd_boolean local_toc_syms = FALSE;
8287
8288 /* Shuffle the toc contents, and at the same time convert the
8289 skip array from booleans into offsets. */
8290 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8291 goto error_ret;
8292
8293 elf_section_data (toc)->this_hdr.contents = contents;
8294
8295 for (src = contents, off = 0, drop = skip;
8296 src < contents + toc->size;
8297 src += 8, ++drop)
8298 {
8299 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8300 off += 8;
8301 else if (off != 0)
8302 {
8303 *drop = off;
8304 memcpy (src - off, src, 8);
8305 }
8306 }
8307 *drop = off;
8308 toc->rawsize = toc->size;
8309 toc->size = src - contents - off;
8310
8311 /* Adjust addends for relocs against the toc section sym,
8312 and optimize any accesses we can. */
8313 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8314 {
8315 if (sec->reloc_count == 0
8316 || elf_discarded_section (sec))
8317 continue;
8318
8319 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8320 info->keep_memory);
8321 if (relstart == NULL)
8322 goto error_ret;
8323
8324 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8325 {
8326 enum elf_ppc64_reloc_type r_type;
8327 unsigned long r_symndx;
8328 asection *sym_sec;
8329 struct elf_link_hash_entry *h;
8330 bfd_vma val;
8331
8332 r_type = ELF64_R_TYPE (rel->r_info);
8333 switch (r_type)
8334 {
8335 default:
8336 continue;
8337
8338 case R_PPC64_TOC16:
8339 case R_PPC64_TOC16_LO:
8340 case R_PPC64_TOC16_HI:
8341 case R_PPC64_TOC16_HA:
8342 case R_PPC64_TOC16_DS:
8343 case R_PPC64_TOC16_LO_DS:
8344 case R_PPC64_ADDR64:
8345 break;
8346 }
8347
8348 r_symndx = ELF64_R_SYM (rel->r_info);
8349 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8350 r_symndx, ibfd))
8351 goto error_ret;
8352
8353 if (sym_sec != toc)
8354 continue;
8355
8356 if (h != NULL)
8357 val = h->root.u.def.value;
8358 else
8359 {
8360 val = sym->st_value;
8361 if (val != 0)
8362 local_toc_syms = TRUE;
8363 }
8364
8365 val += rel->r_addend;
8366
8367 if (val > toc->rawsize)
8368 val = toc->rawsize;
8369 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8370 continue;
8371 else if ((skip[val >> 3] & can_optimize) != 0)
8372 {
8373 Elf_Internal_Rela *tocrel
8374 = toc_relocs + (skip[val >> 3] >> 2);
8375 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8376
8377 switch (r_type)
8378 {
8379 case R_PPC64_TOC16_HA:
8380 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8381 break;
8382
8383 case R_PPC64_TOC16_LO_DS:
8384 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8385 break;
8386
8387 default:
8388 abort ();
8389 }
8390 rel->r_addend = tocrel->r_addend;
8391 elf_section_data (sec)->relocs = relstart;
8392 continue;
8393 }
8394
8395 if (h != NULL || sym->st_value != 0)
8396 continue;
8397
8398 rel->r_addend -= skip[val >> 3];
8399 elf_section_data (sec)->relocs = relstart;
8400 }
8401
8402 if (elf_section_data (sec)->relocs != relstart)
8403 free (relstart);
8404 }
8405
8406 /* We shouldn't have local or global symbols defined in the TOC,
8407 but handle them anyway. */
8408 if (local_syms != NULL)
8409 for (sym = local_syms;
8410 sym < local_syms + symtab_hdr->sh_info;
8411 ++sym)
8412 if (sym->st_value != 0
8413 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8414 {
8415 unsigned long i;
8416
8417 if (sym->st_value > toc->rawsize)
8418 i = toc->rawsize >> 3;
8419 else
8420 i = sym->st_value >> 3;
8421
8422 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8423 {
8424 if (local_toc_syms)
8425 (*_bfd_error_handler)
8426 (_("%s defined on removed toc entry"),
8427 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8428 do
8429 ++i;
8430 while ((skip[i] & (ref_from_discarded | can_optimize)));
8431 sym->st_value = (bfd_vma) i << 3;
8432 }
8433
8434 sym->st_value -= skip[i];
8435 symtab_hdr->contents = (unsigned char *) local_syms;
8436 }
8437
8438 /* Adjust any global syms defined in this toc input section. */
8439 if (toc_inf.global_toc_syms)
8440 {
8441 toc_inf.toc = toc;
8442 toc_inf.skip = skip;
8443 toc_inf.global_toc_syms = FALSE;
8444 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8445 &toc_inf);
8446 }
8447
8448 if (toc->reloc_count != 0)
8449 {
8450 Elf_Internal_Shdr *rel_hdr;
8451 Elf_Internal_Rela *wrel;
8452 bfd_size_type sz;
8453
8454 /* Remove unused toc relocs, and adjust those we keep. */
8455 if (toc_relocs == NULL)
8456 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8457 info->keep_memory);
8458 if (toc_relocs == NULL)
8459 goto error_ret;
8460
8461 wrel = toc_relocs;
8462 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8463 if ((skip[rel->r_offset >> 3]
8464 & (ref_from_discarded | can_optimize)) == 0)
8465 {
8466 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8467 wrel->r_info = rel->r_info;
8468 wrel->r_addend = rel->r_addend;
8469 ++wrel;
8470 }
8471 else if (!dec_dynrel_count (rel->r_info, toc, info,
8472 &local_syms, NULL, NULL))
8473 goto error_ret;
8474
8475 elf_section_data (toc)->relocs = toc_relocs;
8476 toc->reloc_count = wrel - toc_relocs;
8477 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8478 sz = rel_hdr->sh_entsize;
8479 rel_hdr->sh_size = toc->reloc_count * sz;
8480 }
8481 }
8482 else if (toc_relocs != NULL
8483 && elf_section_data (toc)->relocs != toc_relocs)
8484 free (toc_relocs);
8485
8486 if (local_syms != NULL
8487 && symtab_hdr->contents != (unsigned char *) local_syms)
8488 {
8489 if (!info->keep_memory)
8490 free (local_syms);
8491 else
8492 symtab_hdr->contents = (unsigned char *) local_syms;
8493 }
8494 free (skip);
8495 }
8496
8497 return TRUE;
8498 }
8499
8500 /* Return true iff input section I references the TOC using
8501 instructions limited to +/-32k offsets. */
8502
8503 bfd_boolean
8504 ppc64_elf_has_small_toc_reloc (asection *i)
8505 {
8506 return (is_ppc64_elf (i->owner)
8507 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8508 }
8509
8510 /* Allocate space for one GOT entry. */
8511
8512 static void
8513 allocate_got (struct elf_link_hash_entry *h,
8514 struct bfd_link_info *info,
8515 struct got_entry *gent)
8516 {
8517 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8518 bfd_boolean dyn;
8519 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8520 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8521 ? 16 : 8);
8522 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8523 ? 2 : 1) * sizeof (Elf64_External_Rela);
8524 asection *got = ppc64_elf_tdata (gent->owner)->got;
8525
8526 gent->got.offset = got->size;
8527 got->size += entsize;
8528
8529 dyn = htab->elf.dynamic_sections_created;
8530 if ((info->shared
8531 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8532 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8533 || h->root.type != bfd_link_hash_undefweak))
8534 {
8535 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8536 relgot->size += rentsize;
8537 }
8538 else if (h->type == STT_GNU_IFUNC)
8539 {
8540 asection *relgot = htab->reliplt;
8541 relgot->size += rentsize;
8542 htab->got_reli_size += rentsize;
8543 }
8544 }
8545
8546 /* This function merges got entries in the same toc group. */
8547
8548 static void
8549 merge_got_entries (struct got_entry **pent)
8550 {
8551 struct got_entry *ent, *ent2;
8552
8553 for (ent = *pent; ent != NULL; ent = ent->next)
8554 if (!ent->is_indirect)
8555 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8556 if (!ent2->is_indirect
8557 && ent2->addend == ent->addend
8558 && ent2->tls_type == ent->tls_type
8559 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8560 {
8561 ent2->is_indirect = TRUE;
8562 ent2->got.ent = ent;
8563 }
8564 }
8565
8566 /* Allocate space in .plt, .got and associated reloc sections for
8567 dynamic relocs. */
8568
8569 static bfd_boolean
8570 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8571 {
8572 struct bfd_link_info *info;
8573 struct ppc_link_hash_table *htab;
8574 asection *s;
8575 struct ppc_link_hash_entry *eh;
8576 struct elf_dyn_relocs *p;
8577 struct got_entry **pgent, *gent;
8578
8579 if (h->root.type == bfd_link_hash_indirect)
8580 return TRUE;
8581
8582 info = (struct bfd_link_info *) inf;
8583 htab = ppc_hash_table (info);
8584 if (htab == NULL)
8585 return FALSE;
8586
8587 if ((htab->elf.dynamic_sections_created
8588 && h->dynindx != -1
8589 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8590 || h->type == STT_GNU_IFUNC)
8591 {
8592 struct plt_entry *pent;
8593 bfd_boolean doneone = FALSE;
8594 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8595 if (pent->plt.refcount > 0)
8596 {
8597 if (!htab->elf.dynamic_sections_created
8598 || h->dynindx == -1)
8599 {
8600 s = htab->iplt;
8601 pent->plt.offset = s->size;
8602 s->size += PLT_ENTRY_SIZE;
8603 s = htab->reliplt;
8604 }
8605 else
8606 {
8607 /* If this is the first .plt entry, make room for the special
8608 first entry. */
8609 s = htab->plt;
8610 if (s->size == 0)
8611 s->size += PLT_INITIAL_ENTRY_SIZE;
8612
8613 pent->plt.offset = s->size;
8614
8615 /* Make room for this entry. */
8616 s->size += PLT_ENTRY_SIZE;
8617
8618 /* Make room for the .glink code. */
8619 s = htab->glink;
8620 if (s->size == 0)
8621 s->size += GLINK_CALL_STUB_SIZE;
8622 /* We need bigger stubs past index 32767. */
8623 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8624 s->size += 4;
8625 s->size += 2*4;
8626
8627 /* We also need to make an entry in the .rela.plt section. */
8628 s = htab->relplt;
8629 }
8630 s->size += sizeof (Elf64_External_Rela);
8631 doneone = TRUE;
8632 }
8633 else
8634 pent->plt.offset = (bfd_vma) -1;
8635 if (!doneone)
8636 {
8637 h->plt.plist = NULL;
8638 h->needs_plt = 0;
8639 }
8640 }
8641 else
8642 {
8643 h->plt.plist = NULL;
8644 h->needs_plt = 0;
8645 }
8646
8647 eh = (struct ppc_link_hash_entry *) h;
8648 /* Run through the TLS GD got entries first if we're changing them
8649 to TPREL. */
8650 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8651 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8652 if (gent->got.refcount > 0
8653 && (gent->tls_type & TLS_GD) != 0)
8654 {
8655 /* This was a GD entry that has been converted to TPREL. If
8656 there happens to be a TPREL entry we can use that one. */
8657 struct got_entry *ent;
8658 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8659 if (ent->got.refcount > 0
8660 && (ent->tls_type & TLS_TPREL) != 0
8661 && ent->addend == gent->addend
8662 && ent->owner == gent->owner)
8663 {
8664 gent->got.refcount = 0;
8665 break;
8666 }
8667
8668 /* If not, then we'll be using our own TPREL entry. */
8669 if (gent->got.refcount != 0)
8670 gent->tls_type = TLS_TLS | TLS_TPREL;
8671 }
8672
8673 /* Remove any list entry that won't generate a word in the GOT before
8674 we call merge_got_entries. Otherwise we risk merging to empty
8675 entries. */
8676 pgent = &h->got.glist;
8677 while ((gent = *pgent) != NULL)
8678 if (gent->got.refcount > 0)
8679 {
8680 if ((gent->tls_type & TLS_LD) != 0
8681 && !h->def_dynamic)
8682 {
8683 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8684 *pgent = gent->next;
8685 }
8686 else
8687 pgent = &gent->next;
8688 }
8689 else
8690 *pgent = gent->next;
8691
8692 if (!htab->do_multi_toc)
8693 merge_got_entries (&h->got.glist);
8694
8695 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8696 if (!gent->is_indirect)
8697 {
8698 /* Make sure this symbol is output as a dynamic symbol.
8699 Undefined weak syms won't yet be marked as dynamic,
8700 nor will all TLS symbols. */
8701 if (h->dynindx == -1
8702 && !h->forced_local
8703 && h->type != STT_GNU_IFUNC
8704 && htab->elf.dynamic_sections_created)
8705 {
8706 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8707 return FALSE;
8708 }
8709
8710 if (!is_ppc64_elf (gent->owner))
8711 abort ();
8712
8713 allocate_got (h, info, gent);
8714 }
8715
8716 if (eh->dyn_relocs == NULL
8717 || (!htab->elf.dynamic_sections_created
8718 && h->type != STT_GNU_IFUNC))
8719 return TRUE;
8720
8721 /* In the shared -Bsymbolic case, discard space allocated for
8722 dynamic pc-relative relocs against symbols which turn out to be
8723 defined in regular objects. For the normal shared case, discard
8724 space for relocs that have become local due to symbol visibility
8725 changes. */
8726
8727 if (info->shared)
8728 {
8729 /* Relocs that use pc_count are those that appear on a call insn,
8730 or certain REL relocs (see must_be_dyn_reloc) that can be
8731 generated via assembly. We want calls to protected symbols to
8732 resolve directly to the function rather than going via the plt.
8733 If people want function pointer comparisons to work as expected
8734 then they should avoid writing weird assembly. */
8735 if (SYMBOL_CALLS_LOCAL (info, h))
8736 {
8737 struct elf_dyn_relocs **pp;
8738
8739 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8740 {
8741 p->count -= p->pc_count;
8742 p->pc_count = 0;
8743 if (p->count == 0)
8744 *pp = p->next;
8745 else
8746 pp = &p->next;
8747 }
8748 }
8749
8750 /* Also discard relocs on undefined weak syms with non-default
8751 visibility. */
8752 if (eh->dyn_relocs != NULL
8753 && h->root.type == bfd_link_hash_undefweak)
8754 {
8755 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8756 eh->dyn_relocs = NULL;
8757
8758 /* Make sure this symbol is output as a dynamic symbol.
8759 Undefined weak syms won't yet be marked as dynamic. */
8760 else if (h->dynindx == -1
8761 && !h->forced_local)
8762 {
8763 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8764 return FALSE;
8765 }
8766 }
8767 }
8768 else if (h->type == STT_GNU_IFUNC)
8769 {
8770 if (!h->non_got_ref)
8771 eh->dyn_relocs = NULL;
8772 }
8773 else if (ELIMINATE_COPY_RELOCS)
8774 {
8775 /* For the non-shared case, discard space for relocs against
8776 symbols which turn out to need copy relocs or are not
8777 dynamic. */
8778
8779 if (!h->non_got_ref
8780 && !h->def_regular)
8781 {
8782 /* Make sure this symbol is output as a dynamic symbol.
8783 Undefined weak syms won't yet be marked as dynamic. */
8784 if (h->dynindx == -1
8785 && !h->forced_local)
8786 {
8787 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8788 return FALSE;
8789 }
8790
8791 /* If that succeeded, we know we'll be keeping all the
8792 relocs. */
8793 if (h->dynindx != -1)
8794 goto keep;
8795 }
8796
8797 eh->dyn_relocs = NULL;
8798
8799 keep: ;
8800 }
8801
8802 /* Finally, allocate space. */
8803 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8804 {
8805 asection *sreloc = elf_section_data (p->sec)->sreloc;
8806 if (!htab->elf.dynamic_sections_created)
8807 sreloc = htab->reliplt;
8808 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8809 }
8810
8811 return TRUE;
8812 }
8813
8814 /* Find any dynamic relocs that apply to read-only sections. */
8815
8816 static bfd_boolean
8817 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8818 {
8819 struct ppc_link_hash_entry *eh;
8820 struct elf_dyn_relocs *p;
8821
8822 eh = (struct ppc_link_hash_entry *) h;
8823 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8824 {
8825 asection *s = p->sec->output_section;
8826
8827 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8828 {
8829 struct bfd_link_info *info = inf;
8830
8831 info->flags |= DF_TEXTREL;
8832
8833 /* Not an error, just cut short the traversal. */
8834 return FALSE;
8835 }
8836 }
8837 return TRUE;
8838 }
8839
8840 /* Set the sizes of the dynamic sections. */
8841
8842 static bfd_boolean
8843 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8844 struct bfd_link_info *info)
8845 {
8846 struct ppc_link_hash_table *htab;
8847 bfd *dynobj;
8848 asection *s;
8849 bfd_boolean relocs;
8850 bfd *ibfd;
8851 struct got_entry *first_tlsld;
8852
8853 htab = ppc_hash_table (info);
8854 if (htab == NULL)
8855 return FALSE;
8856
8857 dynobj = htab->elf.dynobj;
8858 if (dynobj == NULL)
8859 abort ();
8860
8861 if (htab->elf.dynamic_sections_created)
8862 {
8863 /* Set the contents of the .interp section to the interpreter. */
8864 if (info->executable)
8865 {
8866 s = bfd_get_section_by_name (dynobj, ".interp");
8867 if (s == NULL)
8868 abort ();
8869 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8870 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8871 }
8872 }
8873
8874 /* Set up .got offsets for local syms, and space for local dynamic
8875 relocs. */
8876 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8877 {
8878 struct got_entry **lgot_ents;
8879 struct got_entry **end_lgot_ents;
8880 struct plt_entry **local_plt;
8881 struct plt_entry **end_local_plt;
8882 unsigned char *lgot_masks;
8883 bfd_size_type locsymcount;
8884 Elf_Internal_Shdr *symtab_hdr;
8885 asection *srel;
8886
8887 if (!is_ppc64_elf (ibfd))
8888 continue;
8889
8890 for (s = ibfd->sections; s != NULL; s = s->next)
8891 {
8892 struct elf_dyn_relocs *p;
8893
8894 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8895 {
8896 if (!bfd_is_abs_section (p->sec)
8897 && bfd_is_abs_section (p->sec->output_section))
8898 {
8899 /* Input section has been discarded, either because
8900 it is a copy of a linkonce section or due to
8901 linker script /DISCARD/, so we'll be discarding
8902 the relocs too. */
8903 }
8904 else if (p->count != 0)
8905 {
8906 srel = elf_section_data (p->sec)->sreloc;
8907 if (!htab->elf.dynamic_sections_created)
8908 srel = htab->reliplt;
8909 srel->size += p->count * sizeof (Elf64_External_Rela);
8910 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8911 info->flags |= DF_TEXTREL;
8912 }
8913 }
8914 }
8915
8916 lgot_ents = elf_local_got_ents (ibfd);
8917 if (!lgot_ents)
8918 continue;
8919
8920 symtab_hdr = &elf_symtab_hdr (ibfd);
8921 locsymcount = symtab_hdr->sh_info;
8922 end_lgot_ents = lgot_ents + locsymcount;
8923 local_plt = (struct plt_entry **) end_lgot_ents;
8924 end_local_plt = local_plt + locsymcount;
8925 lgot_masks = (unsigned char *) end_local_plt;
8926 s = ppc64_elf_tdata (ibfd)->got;
8927 srel = ppc64_elf_tdata (ibfd)->relgot;
8928 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8929 {
8930 struct got_entry **pent, *ent;
8931
8932 pent = lgot_ents;
8933 while ((ent = *pent) != NULL)
8934 if (ent->got.refcount > 0)
8935 {
8936 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8937 {
8938 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8939 *pent = ent->next;
8940 }
8941 else
8942 {
8943 unsigned int num = 1;
8944 ent->got.offset = s->size;
8945 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8946 num = 2;
8947 s->size += num * 8;
8948 if (info->shared)
8949 srel->size += num * sizeof (Elf64_External_Rela);
8950 else if ((*lgot_masks & PLT_IFUNC) != 0)
8951 {
8952 htab->reliplt->size
8953 += num * sizeof (Elf64_External_Rela);
8954 htab->got_reli_size
8955 += num * sizeof (Elf64_External_Rela);
8956 }
8957 pent = &ent->next;
8958 }
8959 }
8960 else
8961 *pent = ent->next;
8962 }
8963
8964 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8965 for (; local_plt < end_local_plt; ++local_plt)
8966 {
8967 struct plt_entry *ent;
8968
8969 for (ent = *local_plt; ent != NULL; ent = ent->next)
8970 if (ent->plt.refcount > 0)
8971 {
8972 s = htab->iplt;
8973 ent->plt.offset = s->size;
8974 s->size += PLT_ENTRY_SIZE;
8975
8976 htab->reliplt->size += sizeof (Elf64_External_Rela);
8977 }
8978 else
8979 ent->plt.offset = (bfd_vma) -1;
8980 }
8981 }
8982
8983 /* Allocate global sym .plt and .got entries, and space for global
8984 sym dynamic relocs. */
8985 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8986
8987 first_tlsld = NULL;
8988 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8989 {
8990 struct got_entry *ent;
8991
8992 if (!is_ppc64_elf (ibfd))
8993 continue;
8994
8995 ent = ppc64_tlsld_got (ibfd);
8996 if (ent->got.refcount > 0)
8997 {
8998 if (!htab->do_multi_toc && first_tlsld != NULL)
8999 {
9000 ent->is_indirect = TRUE;
9001 ent->got.ent = first_tlsld;
9002 }
9003 else
9004 {
9005 if (first_tlsld == NULL)
9006 first_tlsld = ent;
9007 s = ppc64_elf_tdata (ibfd)->got;
9008 ent->got.offset = s->size;
9009 ent->owner = ibfd;
9010 s->size += 16;
9011 if (info->shared)
9012 {
9013 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9014 srel->size += sizeof (Elf64_External_Rela);
9015 }
9016 }
9017 }
9018 else
9019 ent->got.offset = (bfd_vma) -1;
9020 }
9021
9022 /* We now have determined the sizes of the various dynamic sections.
9023 Allocate memory for them. */
9024 relocs = FALSE;
9025 for (s = dynobj->sections; s != NULL; s = s->next)
9026 {
9027 if ((s->flags & SEC_LINKER_CREATED) == 0)
9028 continue;
9029
9030 if (s == htab->brlt || s == htab->relbrlt)
9031 /* These haven't been allocated yet; don't strip. */
9032 continue;
9033 else if (s == htab->got
9034 || s == htab->plt
9035 || s == htab->iplt
9036 || s == htab->glink
9037 || s == htab->dynbss)
9038 {
9039 /* Strip this section if we don't need it; see the
9040 comment below. */
9041 }
9042 else if (s == htab->glink_eh_frame)
9043 {
9044 if (!bfd_is_abs_section (s->output_section))
9045 /* Not sized yet. */
9046 continue;
9047 }
9048 else if (CONST_STRNEQ (s->name, ".rela"))
9049 {
9050 if (s->size != 0)
9051 {
9052 if (s != htab->relplt)
9053 relocs = TRUE;
9054
9055 /* We use the reloc_count field as a counter if we need
9056 to copy relocs into the output file. */
9057 s->reloc_count = 0;
9058 }
9059 }
9060 else
9061 {
9062 /* It's not one of our sections, so don't allocate space. */
9063 continue;
9064 }
9065
9066 if (s->size == 0)
9067 {
9068 /* If we don't need this section, strip it from the
9069 output file. This is mostly to handle .rela.bss and
9070 .rela.plt. We must create both sections in
9071 create_dynamic_sections, because they must be created
9072 before the linker maps input sections to output
9073 sections. The linker does that before
9074 adjust_dynamic_symbol is called, and it is that
9075 function which decides whether anything needs to go
9076 into these sections. */
9077 s->flags |= SEC_EXCLUDE;
9078 continue;
9079 }
9080
9081 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9082 continue;
9083
9084 /* Allocate memory for the section contents. We use bfd_zalloc
9085 here in case unused entries are not reclaimed before the
9086 section's contents are written out. This should not happen,
9087 but this way if it does we get a R_PPC64_NONE reloc in .rela
9088 sections instead of garbage.
9089 We also rely on the section contents being zero when writing
9090 the GOT. */
9091 s->contents = bfd_zalloc (dynobj, s->size);
9092 if (s->contents == NULL)
9093 return FALSE;
9094 }
9095
9096 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9097 {
9098 if (!is_ppc64_elf (ibfd))
9099 continue;
9100
9101 s = ppc64_elf_tdata (ibfd)->got;
9102 if (s != NULL && s != htab->got)
9103 {
9104 if (s->size == 0)
9105 s->flags |= SEC_EXCLUDE;
9106 else
9107 {
9108 s->contents = bfd_zalloc (ibfd, s->size);
9109 if (s->contents == NULL)
9110 return FALSE;
9111 }
9112 }
9113 s = ppc64_elf_tdata (ibfd)->relgot;
9114 if (s != NULL)
9115 {
9116 if (s->size == 0)
9117 s->flags |= SEC_EXCLUDE;
9118 else
9119 {
9120 s->contents = bfd_zalloc (ibfd, s->size);
9121 if (s->contents == NULL)
9122 return FALSE;
9123 relocs = TRUE;
9124 s->reloc_count = 0;
9125 }
9126 }
9127 }
9128
9129 if (htab->elf.dynamic_sections_created)
9130 {
9131 /* Add some entries to the .dynamic section. We fill in the
9132 values later, in ppc64_elf_finish_dynamic_sections, but we
9133 must add the entries now so that we get the correct size for
9134 the .dynamic section. The DT_DEBUG entry is filled in by the
9135 dynamic linker and used by the debugger. */
9136 #define add_dynamic_entry(TAG, VAL) \
9137 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9138
9139 if (info->executable)
9140 {
9141 if (!add_dynamic_entry (DT_DEBUG, 0))
9142 return FALSE;
9143 }
9144
9145 if (htab->plt != NULL && htab->plt->size != 0)
9146 {
9147 if (!add_dynamic_entry (DT_PLTGOT, 0)
9148 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9149 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9150 || !add_dynamic_entry (DT_JMPREL, 0)
9151 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9152 return FALSE;
9153 }
9154
9155 if (NO_OPD_RELOCS)
9156 {
9157 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9158 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9159 return FALSE;
9160 }
9161
9162 if (!htab->no_tls_get_addr_opt
9163 && htab->tls_get_addr_fd != NULL
9164 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9165 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9166 return FALSE;
9167
9168 if (relocs)
9169 {
9170 if (!add_dynamic_entry (DT_RELA, 0)
9171 || !add_dynamic_entry (DT_RELASZ, 0)
9172 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9173 return FALSE;
9174
9175 /* If any dynamic relocs apply to a read-only section,
9176 then we need a DT_TEXTREL entry. */
9177 if ((info->flags & DF_TEXTREL) == 0)
9178 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9179
9180 if ((info->flags & DF_TEXTREL) != 0)
9181 {
9182 if (!add_dynamic_entry (DT_TEXTREL, 0))
9183 return FALSE;
9184 }
9185 }
9186 }
9187 #undef add_dynamic_entry
9188
9189 return TRUE;
9190 }
9191
9192 /* Determine the type of stub needed, if any, for a call. */
9193
9194 static inline enum ppc_stub_type
9195 ppc_type_of_stub (asection *input_sec,
9196 const Elf_Internal_Rela *rel,
9197 struct ppc_link_hash_entry **hash,
9198 struct plt_entry **plt_ent,
9199 bfd_vma destination)
9200 {
9201 struct ppc_link_hash_entry *h = *hash;
9202 bfd_vma location;
9203 bfd_vma branch_offset;
9204 bfd_vma max_branch_offset;
9205 enum elf_ppc64_reloc_type r_type;
9206
9207 if (h != NULL)
9208 {
9209 struct plt_entry *ent;
9210 struct ppc_link_hash_entry *fdh = h;
9211 if (h->oh != NULL
9212 && h->oh->is_func_descriptor)
9213 {
9214 fdh = ppc_follow_link (h->oh);
9215 *hash = fdh;
9216 }
9217
9218 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9219 if (ent->addend == rel->r_addend
9220 && ent->plt.offset != (bfd_vma) -1)
9221 {
9222 *plt_ent = ent;
9223 return ppc_stub_plt_call;
9224 }
9225
9226 /* Here, we know we don't have a plt entry. If we don't have a
9227 either a defined function descriptor or a defined entry symbol
9228 in a regular object file, then it is pointless trying to make
9229 any other type of stub. */
9230 if (!is_static_defined (&fdh->elf)
9231 && !is_static_defined (&h->elf))
9232 return ppc_stub_none;
9233 }
9234 else if (elf_local_got_ents (input_sec->owner) != NULL)
9235 {
9236 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9237 struct plt_entry **local_plt = (struct plt_entry **)
9238 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9239 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9240
9241 if (local_plt[r_symndx] != NULL)
9242 {
9243 struct plt_entry *ent;
9244
9245 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9246 if (ent->addend == rel->r_addend
9247 && ent->plt.offset != (bfd_vma) -1)
9248 {
9249 *plt_ent = ent;
9250 return ppc_stub_plt_call;
9251 }
9252 }
9253 }
9254
9255 /* Determine where the call point is. */
9256 location = (input_sec->output_offset
9257 + input_sec->output_section->vma
9258 + rel->r_offset);
9259
9260 branch_offset = destination - location;
9261 r_type = ELF64_R_TYPE (rel->r_info);
9262
9263 /* Determine if a long branch stub is needed. */
9264 max_branch_offset = 1 << 25;
9265 if (r_type != R_PPC64_REL24)
9266 max_branch_offset = 1 << 15;
9267
9268 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9269 /* We need a stub. Figure out whether a long_branch or plt_branch
9270 is needed later. */
9271 return ppc_stub_long_branch;
9272
9273 return ppc_stub_none;
9274 }
9275
9276 /* Build a .plt call stub. */
9277
9278 static inline bfd_byte *
9279 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r,
9280 bfd_boolean plt_static_chain)
9281 {
9282 #define PPC_LO(v) ((v) & 0xffff)
9283 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9284 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9285
9286 if (PPC_HA (offset) != 0)
9287 {
9288 if (r != NULL)
9289 {
9290 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9291 r[1].r_offset = r[0].r_offset + 8;
9292 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9293 r[1].r_addend = r[0].r_addend;
9294 if (PPC_HA (offset + 16) != PPC_HA (offset))
9295 {
9296 r[2].r_offset = r[1].r_offset + 4;
9297 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9298 r[2].r_addend = r[0].r_addend;
9299 }
9300 else
9301 {
9302 r[2].r_offset = r[1].r_offset + 8;
9303 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9304 r[2].r_addend = r[0].r_addend + 8;
9305 r[3].r_offset = r[2].r_offset + 4;
9306 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9307 r[3].r_addend = r[0].r_addend + 16;
9308 }
9309 }
9310 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9311 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9312 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9313 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9314 {
9315 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9316 offset = 0;
9317 }
9318 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9319 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9320 if (plt_static_chain)
9321 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9322 bfd_put_32 (obfd, BCTR, p), p += 4;
9323 }
9324 else
9325 {
9326 if (r != NULL)
9327 {
9328 r[0].r_offset += 4;
9329 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9330 if (PPC_HA (offset + 16) != PPC_HA (offset))
9331 {
9332 r[1].r_offset = r[0].r_offset + 4;
9333 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9334 r[1].r_addend = r[0].r_addend;
9335 }
9336 else
9337 {
9338 r[1].r_offset = r[0].r_offset + 8;
9339 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9340 r[1].r_addend = r[0].r_addend + 16;
9341 r[2].r_offset = r[1].r_offset + 4;
9342 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9343 r[2].r_addend = r[0].r_addend + 8;
9344 }
9345 }
9346 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9347 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9348 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9349 {
9350 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9351 offset = 0;
9352 }
9353 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9354 if (plt_static_chain)
9355 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9356 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9357 bfd_put_32 (obfd, BCTR, p), p += 4;
9358 }
9359 return p;
9360 }
9361
9362 /* Build a special .plt call stub for __tls_get_addr. */
9363
9364 #define LD_R11_0R3 0xe9630000
9365 #define LD_R12_0R3 0xe9830000
9366 #define MR_R0_R3 0x7c601b78
9367 #define CMPDI_R11_0 0x2c2b0000
9368 #define ADD_R3_R12_R13 0x7c6c6a14
9369 #define BEQLR 0x4d820020
9370 #define MR_R3_R0 0x7c030378
9371 #define MFLR_R11 0x7d6802a6
9372 #define STD_R11_0R1 0xf9610000
9373 #define BCTRL 0x4e800421
9374 #define LD_R11_0R1 0xe9610000
9375 #define LD_R2_0R1 0xe8410000
9376 #define MTLR_R11 0x7d6803a6
9377
9378 static inline bfd_byte *
9379 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9380 Elf_Internal_Rela *r, bfd_boolean plt_static_chain)
9381 {
9382 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9383 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9384 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9385 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9386 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9387 bfd_put_32 (obfd, BEQLR, p), p += 4;
9388 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9389 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9390 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9391
9392 if (r != NULL)
9393 r[0].r_offset += 9 * 4;
9394 p = build_plt_stub (obfd, p, offset, r, plt_static_chain);
9395 bfd_put_32 (obfd, BCTRL, p - 4);
9396
9397 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9398 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9399 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9400 bfd_put_32 (obfd, BLR, p), p += 4;
9401
9402 return p;
9403 }
9404
9405 static Elf_Internal_Rela *
9406 get_relocs (asection *sec, int count)
9407 {
9408 Elf_Internal_Rela *relocs;
9409 struct bfd_elf_section_data *elfsec_data;
9410
9411 elfsec_data = elf_section_data (sec);
9412 relocs = elfsec_data->relocs;
9413 if (relocs == NULL)
9414 {
9415 bfd_size_type relsize;
9416 relsize = sec->reloc_count * sizeof (*relocs);
9417 relocs = bfd_alloc (sec->owner, relsize);
9418 if (relocs == NULL)
9419 return NULL;
9420 elfsec_data->relocs = relocs;
9421 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9422 sizeof (Elf_Internal_Shdr));
9423 if (elfsec_data->rela.hdr == NULL)
9424 return NULL;
9425 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9426 * sizeof (Elf64_External_Rela));
9427 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9428 sec->reloc_count = 0;
9429 }
9430 relocs += sec->reloc_count;
9431 sec->reloc_count += count;
9432 return relocs;
9433 }
9434
9435 static bfd_vma
9436 get_r2off (struct bfd_link_info *info,
9437 struct ppc_stub_hash_entry *stub_entry)
9438 {
9439 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9440 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9441
9442 if (r2off == 0)
9443 {
9444 /* Support linking -R objects. Get the toc pointer from the
9445 opd entry. */
9446 char buf[8];
9447 asection *opd = stub_entry->h->elf.root.u.def.section;
9448 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9449
9450 if (strcmp (opd->name, ".opd") != 0
9451 || opd->reloc_count != 0)
9452 {
9453 info->callbacks->einfo (_("cannot find opd entry toc for %s\n"),
9454 stub_entry->h->elf.root.root.string);
9455 bfd_set_error (bfd_error_bad_value);
9456 return 0;
9457 }
9458 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9459 return 0;
9460 r2off = bfd_get_64 (opd->owner, buf);
9461 r2off -= elf_gp (info->output_bfd);
9462 }
9463 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9464 return r2off;
9465 }
9466
9467 static bfd_boolean
9468 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9469 {
9470 struct ppc_stub_hash_entry *stub_entry;
9471 struct ppc_branch_hash_entry *br_entry;
9472 struct bfd_link_info *info;
9473 struct ppc_link_hash_table *htab;
9474 bfd_byte *loc;
9475 bfd_byte *p;
9476 bfd_vma dest, off;
9477 int size;
9478 Elf_Internal_Rela *r;
9479 asection *plt;
9480
9481 /* Massage our args to the form they really have. */
9482 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9483 info = in_arg;
9484
9485 htab = ppc_hash_table (info);
9486 if (htab == NULL)
9487 return FALSE;
9488
9489 /* Make a note of the offset within the stubs for this entry. */
9490 stub_entry->stub_offset = stub_entry->stub_sec->size;
9491 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9492
9493 htab->stub_count[stub_entry->stub_type - 1] += 1;
9494 switch (stub_entry->stub_type)
9495 {
9496 case ppc_stub_long_branch:
9497 case ppc_stub_long_branch_r2off:
9498 /* Branches are relative. This is where we are going to. */
9499 off = dest = (stub_entry->target_value
9500 + stub_entry->target_section->output_offset
9501 + stub_entry->target_section->output_section->vma);
9502
9503 /* And this is where we are coming from. */
9504 off -= (stub_entry->stub_offset
9505 + stub_entry->stub_sec->output_offset
9506 + stub_entry->stub_sec->output_section->vma);
9507
9508 size = 4;
9509 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9510 {
9511 bfd_vma r2off = get_r2off (info, stub_entry);
9512
9513 if (r2off == 0)
9514 {
9515 htab->stub_error = TRUE;
9516 return FALSE;
9517 }
9518 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9519 loc += 4;
9520 size = 12;
9521 if (PPC_HA (r2off) != 0)
9522 {
9523 size = 16;
9524 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9525 loc += 4;
9526 }
9527 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9528 loc += 4;
9529 off -= size - 4;
9530 }
9531 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9532
9533 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9534 {
9535 info->callbacks->einfo (_("long branch stub `%s' offset overflow\n"),
9536 stub_entry->root.string);
9537 htab->stub_error = TRUE;
9538 return FALSE;
9539 }
9540
9541 if (info->emitrelocations)
9542 {
9543 r = get_relocs (stub_entry->stub_sec, 1);
9544 if (r == NULL)
9545 return FALSE;
9546 r->r_offset = loc - stub_entry->stub_sec->contents;
9547 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9548 r->r_addend = dest;
9549 if (stub_entry->h != NULL)
9550 {
9551 struct elf_link_hash_entry **hashes;
9552 unsigned long symndx;
9553 struct ppc_link_hash_entry *h;
9554
9555 hashes = elf_sym_hashes (htab->stub_bfd);
9556 if (hashes == NULL)
9557 {
9558 bfd_size_type hsize;
9559
9560 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9561 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9562 if (hashes == NULL)
9563 return FALSE;
9564 elf_sym_hashes (htab->stub_bfd) = hashes;
9565 htab->stub_globals = 1;
9566 }
9567 symndx = htab->stub_globals++;
9568 h = stub_entry->h;
9569 hashes[symndx] = &h->elf;
9570 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9571 if (h->oh != NULL && h->oh->is_func)
9572 h = ppc_follow_link (h->oh);
9573 if (h->elf.root.u.def.section != stub_entry->target_section)
9574 /* H is an opd symbol. The addend must be zero. */
9575 r->r_addend = 0;
9576 else
9577 {
9578 off = (h->elf.root.u.def.value
9579 + h->elf.root.u.def.section->output_offset
9580 + h->elf.root.u.def.section->output_section->vma);
9581 r->r_addend -= off;
9582 }
9583 }
9584 }
9585 break;
9586
9587 case ppc_stub_plt_branch:
9588 case ppc_stub_plt_branch_r2off:
9589 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9590 stub_entry->root.string + 9,
9591 FALSE, FALSE);
9592 if (br_entry == NULL)
9593 {
9594 info->callbacks->einfo (_("can't find branch stub `%s'\n"),
9595 stub_entry->root.string);
9596 htab->stub_error = TRUE;
9597 return FALSE;
9598 }
9599
9600 dest = (stub_entry->target_value
9601 + stub_entry->target_section->output_offset
9602 + stub_entry->target_section->output_section->vma);
9603
9604 bfd_put_64 (htab->brlt->owner, dest,
9605 htab->brlt->contents + br_entry->offset);
9606
9607 if (br_entry->iter == htab->stub_iteration)
9608 {
9609 br_entry->iter = 0;
9610
9611 if (htab->relbrlt != NULL)
9612 {
9613 /* Create a reloc for the branch lookup table entry. */
9614 Elf_Internal_Rela rela;
9615 bfd_byte *rl;
9616
9617 rela.r_offset = (br_entry->offset
9618 + htab->brlt->output_offset
9619 + htab->brlt->output_section->vma);
9620 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9621 rela.r_addend = dest;
9622
9623 rl = htab->relbrlt->contents;
9624 rl += (htab->relbrlt->reloc_count++
9625 * sizeof (Elf64_External_Rela));
9626 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9627 }
9628 else if (info->emitrelocations)
9629 {
9630 r = get_relocs (htab->brlt, 1);
9631 if (r == NULL)
9632 return FALSE;
9633 /* brlt, being SEC_LINKER_CREATED does not go through the
9634 normal reloc processing. Symbols and offsets are not
9635 translated from input file to output file form, so
9636 set up the offset per the output file. */
9637 r->r_offset = (br_entry->offset
9638 + htab->brlt->output_offset
9639 + htab->brlt->output_section->vma);
9640 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9641 r->r_addend = dest;
9642 }
9643 }
9644
9645 dest = (br_entry->offset
9646 + htab->brlt->output_offset
9647 + htab->brlt->output_section->vma);
9648
9649 off = (dest
9650 - elf_gp (htab->brlt->output_section->owner)
9651 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9652
9653 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9654 {
9655 info->callbacks->einfo
9656 (_("linkage table error against `%s'\n"),
9657 stub_entry->root.string);
9658 bfd_set_error (bfd_error_bad_value);
9659 htab->stub_error = TRUE;
9660 return FALSE;
9661 }
9662
9663 if (info->emitrelocations)
9664 {
9665 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9666 if (r == NULL)
9667 return FALSE;
9668 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9669 if (bfd_big_endian (info->output_bfd))
9670 r[0].r_offset += 2;
9671 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9672 r[0].r_offset += 4;
9673 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9674 r[0].r_addend = dest;
9675 if (PPC_HA (off) != 0)
9676 {
9677 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9678 r[1].r_offset = r[0].r_offset + 4;
9679 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9680 r[1].r_addend = r[0].r_addend;
9681 }
9682 }
9683
9684 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9685 {
9686 if (PPC_HA (off) != 0)
9687 {
9688 size = 16;
9689 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9690 loc += 4;
9691 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9692 }
9693 else
9694 {
9695 size = 12;
9696 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9697 }
9698 }
9699 else
9700 {
9701 bfd_vma r2off = get_r2off (info, stub_entry);
9702
9703 if (r2off == 0)
9704 {
9705 htab->stub_error = TRUE;
9706 return FALSE;
9707 }
9708
9709 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9710 loc += 4;
9711 size = 20;
9712 if (PPC_HA (off) != 0)
9713 {
9714 size += 4;
9715 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9716 loc += 4;
9717 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9718 loc += 4;
9719 }
9720 else
9721 {
9722 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9723 loc += 4;
9724 }
9725
9726 if (PPC_HA (r2off) != 0)
9727 {
9728 size += 4;
9729 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9730 loc += 4;
9731 }
9732 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9733 }
9734 loc += 4;
9735 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9736 loc += 4;
9737 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9738 break;
9739
9740 case ppc_stub_plt_call:
9741 if (stub_entry->h != NULL
9742 && stub_entry->h->is_func_descriptor
9743 && stub_entry->h->oh != NULL)
9744 {
9745 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9746
9747 /* If the old-ABI "dot-symbol" is undefined make it weak so
9748 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9749 FIXME: We used to define the symbol on one of the call
9750 stubs instead, which is why we test symbol section id
9751 against htab->top_id in various places. Likely all
9752 these checks could now disappear. */
9753 if (fh->elf.root.type == bfd_link_hash_undefined)
9754 fh->elf.root.type = bfd_link_hash_undefweak;
9755 /* Stop undo_symbol_twiddle changing it back to undefined. */
9756 fh->was_undefined = 0;
9757 }
9758
9759 /* Now build the stub. */
9760 dest = stub_entry->plt_ent->plt.offset & ~1;
9761 if (dest >= (bfd_vma) -2)
9762 abort ();
9763
9764 plt = htab->plt;
9765 if (!htab->elf.dynamic_sections_created
9766 || stub_entry->h == NULL
9767 || stub_entry->h->elf.dynindx == -1)
9768 plt = htab->iplt;
9769
9770 dest += plt->output_offset + plt->output_section->vma;
9771
9772 if (stub_entry->h == NULL
9773 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9774 {
9775 Elf_Internal_Rela rela;
9776 bfd_byte *rl;
9777
9778 rela.r_offset = dest;
9779 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9780 rela.r_addend = (stub_entry->target_value
9781 + stub_entry->target_section->output_offset
9782 + stub_entry->target_section->output_section->vma);
9783
9784 rl = (htab->reliplt->contents
9785 + (htab->reliplt->reloc_count++
9786 * sizeof (Elf64_External_Rela)));
9787 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9788 stub_entry->plt_ent->plt.offset |= 1;
9789 }
9790
9791 off = (dest
9792 - elf_gp (plt->output_section->owner)
9793 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9794
9795 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9796 {
9797 info->callbacks->einfo
9798 (_("linkage table error against `%s'\n"),
9799 stub_entry->h != NULL
9800 ? stub_entry->h->elf.root.root.string
9801 : "<local sym>");
9802 bfd_set_error (bfd_error_bad_value);
9803 htab->stub_error = TRUE;
9804 return FALSE;
9805 }
9806
9807 r = NULL;
9808 if (info->emitrelocations)
9809 {
9810 r = get_relocs (stub_entry->stub_sec,
9811 (2 + (PPC_HA (off) != 0)
9812 + (PPC_HA (off + 16) == PPC_HA (off))));
9813 if (r == NULL)
9814 return FALSE;
9815 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9816 if (bfd_big_endian (info->output_bfd))
9817 r[0].r_offset += 2;
9818 r[0].r_addend = dest;
9819 }
9820 if (stub_entry->h != NULL
9821 && (stub_entry->h == htab->tls_get_addr_fd
9822 || stub_entry->h == htab->tls_get_addr)
9823 && !htab->no_tls_get_addr_opt)
9824 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r,
9825 htab->plt_static_chain);
9826 else
9827 p = build_plt_stub (htab->stub_bfd, loc, off, r,
9828 htab->plt_static_chain);
9829 size = p - loc;
9830 break;
9831
9832 default:
9833 BFD_FAIL ();
9834 return FALSE;
9835 }
9836
9837 stub_entry->stub_sec->size += size;
9838
9839 if (htab->emit_stub_syms)
9840 {
9841 struct elf_link_hash_entry *h;
9842 size_t len1, len2;
9843 char *name;
9844 const char *const stub_str[] = { "long_branch",
9845 "long_branch_r2off",
9846 "plt_branch",
9847 "plt_branch_r2off",
9848 "plt_call" };
9849
9850 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9851 len2 = strlen (stub_entry->root.string);
9852 name = bfd_malloc (len1 + len2 + 2);
9853 if (name == NULL)
9854 return FALSE;
9855 memcpy (name, stub_entry->root.string, 9);
9856 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9857 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9858 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9859 if (h == NULL)
9860 return FALSE;
9861 if (h->root.type == bfd_link_hash_new)
9862 {
9863 h->root.type = bfd_link_hash_defined;
9864 h->root.u.def.section = stub_entry->stub_sec;
9865 h->root.u.def.value = stub_entry->stub_offset;
9866 h->ref_regular = 1;
9867 h->def_regular = 1;
9868 h->ref_regular_nonweak = 1;
9869 h->forced_local = 1;
9870 h->non_elf = 0;
9871 }
9872 }
9873
9874 return TRUE;
9875 }
9876
9877 /* As above, but don't actually build the stub. Just bump offset so
9878 we know stub section sizes, and select plt_branch stubs where
9879 long_branch stubs won't do. */
9880
9881 static bfd_boolean
9882 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9883 {
9884 struct ppc_stub_hash_entry *stub_entry;
9885 struct bfd_link_info *info;
9886 struct ppc_link_hash_table *htab;
9887 bfd_vma off;
9888 int size;
9889
9890 /* Massage our args to the form they really have. */
9891 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9892 info = in_arg;
9893
9894 htab = ppc_hash_table (info);
9895 if (htab == NULL)
9896 return FALSE;
9897
9898 if (stub_entry->stub_type == ppc_stub_plt_call)
9899 {
9900 asection *plt;
9901 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9902 if (off >= (bfd_vma) -2)
9903 abort ();
9904 plt = htab->plt;
9905 if (!htab->elf.dynamic_sections_created
9906 || stub_entry->h == NULL
9907 || stub_entry->h->elf.dynindx == -1)
9908 plt = htab->iplt;
9909 off += (plt->output_offset
9910 + plt->output_section->vma
9911 - elf_gp (plt->output_section->owner)
9912 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9913
9914 size = PLT_CALL_STUB_SIZE;
9915 if (!htab->plt_static_chain)
9916 size -= 4;
9917 if (PPC_HA (off) == 0)
9918 size -= 4;
9919 if (PPC_HA (off + 16) != PPC_HA (off))
9920 size += 4;
9921 if (stub_entry->h != NULL
9922 && (stub_entry->h == htab->tls_get_addr_fd
9923 || stub_entry->h == htab->tls_get_addr)
9924 && !htab->no_tls_get_addr_opt)
9925 size += 13 * 4;
9926 if (info->emitrelocations)
9927 {
9928 stub_entry->stub_sec->reloc_count
9929 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9930 stub_entry->stub_sec->flags |= SEC_RELOC;
9931 }
9932 }
9933 else
9934 {
9935 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9936 variants. */
9937 bfd_vma r2off = 0;
9938
9939 off = (stub_entry->target_value
9940 + stub_entry->target_section->output_offset
9941 + stub_entry->target_section->output_section->vma);
9942 off -= (stub_entry->stub_sec->size
9943 + stub_entry->stub_sec->output_offset
9944 + stub_entry->stub_sec->output_section->vma);
9945
9946 /* Reset the stub type from the plt variant in case we now
9947 can reach with a shorter stub. */
9948 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9949 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9950
9951 size = 4;
9952 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9953 {
9954 r2off = get_r2off (info, stub_entry);
9955 if (r2off == 0)
9956 {
9957 htab->stub_error = TRUE;
9958 return FALSE;
9959 }
9960 size = 12;
9961 if (PPC_HA (r2off) != 0)
9962 size = 16;
9963 off -= size - 4;
9964 }
9965
9966 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9967 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9968 {
9969 struct ppc_branch_hash_entry *br_entry;
9970
9971 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9972 stub_entry->root.string + 9,
9973 TRUE, FALSE);
9974 if (br_entry == NULL)
9975 {
9976 info->callbacks->einfo (_("can't build branch stub `%s'\n"),
9977 stub_entry->root.string);
9978 htab->stub_error = TRUE;
9979 return FALSE;
9980 }
9981
9982 if (br_entry->iter != htab->stub_iteration)
9983 {
9984 br_entry->iter = htab->stub_iteration;
9985 br_entry->offset = htab->brlt->size;
9986 htab->brlt->size += 8;
9987
9988 if (htab->relbrlt != NULL)
9989 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9990 else if (info->emitrelocations)
9991 {
9992 htab->brlt->reloc_count += 1;
9993 htab->brlt->flags |= SEC_RELOC;
9994 }
9995 }
9996
9997 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9998 off = (br_entry->offset
9999 + htab->brlt->output_offset
10000 + htab->brlt->output_section->vma
10001 - elf_gp (htab->brlt->output_section->owner)
10002 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10003
10004 if (info->emitrelocations)
10005 {
10006 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10007 stub_entry->stub_sec->flags |= SEC_RELOC;
10008 }
10009
10010 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10011 {
10012 size = 12;
10013 if (PPC_HA (off) != 0)
10014 size = 16;
10015 }
10016 else
10017 {
10018 size = 20;
10019 if (PPC_HA (off) != 0)
10020 size += 4;
10021
10022 if (PPC_HA (r2off) != 0)
10023 size += 4;
10024 }
10025 }
10026 else if (info->emitrelocations)
10027 {
10028 stub_entry->stub_sec->reloc_count += 1;
10029 stub_entry->stub_sec->flags |= SEC_RELOC;
10030 }
10031 }
10032
10033 stub_entry->stub_sec->size += size;
10034 return TRUE;
10035 }
10036
10037 /* Set up various things so that we can make a list of input sections
10038 for each output section included in the link. Returns -1 on error,
10039 0 when no stubs will be needed, and 1 on success. */
10040
10041 int
10042 ppc64_elf_setup_section_lists
10043 (struct bfd_link_info *info,
10044 asection *(*add_stub_section) (const char *, asection *),
10045 void (*layout_sections_again) (void))
10046 {
10047 bfd *input_bfd;
10048 int top_id, top_index, id;
10049 asection *section;
10050 asection **input_list;
10051 bfd_size_type amt;
10052 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10053
10054 if (htab == NULL)
10055 return -1;
10056 /* Stash our params away. */
10057 htab->add_stub_section = add_stub_section;
10058 htab->layout_sections_again = layout_sections_again;
10059
10060 if (htab->brlt == NULL)
10061 return 0;
10062
10063 /* Find the top input section id. */
10064 for (input_bfd = info->input_bfds, top_id = 3;
10065 input_bfd != NULL;
10066 input_bfd = input_bfd->link_next)
10067 {
10068 for (section = input_bfd->sections;
10069 section != NULL;
10070 section = section->next)
10071 {
10072 if (top_id < section->id)
10073 top_id = section->id;
10074 }
10075 }
10076
10077 htab->top_id = top_id;
10078 amt = sizeof (struct map_stub) * (top_id + 1);
10079 htab->stub_group = bfd_zmalloc (amt);
10080 if (htab->stub_group == NULL)
10081 return -1;
10082
10083 /* Set toc_off for com, und, abs and ind sections. */
10084 for (id = 0; id < 3; id++)
10085 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10086
10087 /* We can't use output_bfd->section_count here to find the top output
10088 section index as some sections may have been removed, and
10089 strip_excluded_output_sections doesn't renumber the indices. */
10090 for (section = info->output_bfd->sections, top_index = 0;
10091 section != NULL;
10092 section = section->next)
10093 {
10094 if (top_index < section->index)
10095 top_index = section->index;
10096 }
10097
10098 htab->top_index = top_index;
10099 amt = sizeof (asection *) * (top_index + 1);
10100 input_list = bfd_zmalloc (amt);
10101 htab->input_list = input_list;
10102 if (input_list == NULL)
10103 return -1;
10104
10105 return 1;
10106 }
10107
10108 /* Set up for first pass at multitoc partitioning. */
10109
10110 void
10111 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10112 {
10113 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10114
10115 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10116 htab->toc_curr = elf_gp (info->output_bfd);
10117 htab->toc_bfd = NULL;
10118 htab->toc_first_sec = NULL;
10119 }
10120
10121 /* The linker repeatedly calls this function for each TOC input section
10122 and linker generated GOT section. Group input bfds such that the toc
10123 within a group is less than 64k in size. */
10124
10125 bfd_boolean
10126 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10127 {
10128 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10129 bfd_vma addr, off, limit;
10130
10131 if (htab == NULL)
10132 return FALSE;
10133
10134 if (!htab->second_toc_pass)
10135 {
10136 /* Keep track of the first .toc or .got section for this input bfd. */
10137 if (htab->toc_bfd != isec->owner)
10138 {
10139 htab->toc_bfd = isec->owner;
10140 htab->toc_first_sec = isec;
10141 }
10142
10143 addr = isec->output_offset + isec->output_section->vma;
10144 off = addr - htab->toc_curr;
10145 limit = 0x80008000;
10146 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10147 limit = 0x10000;
10148 if (off + isec->size > limit)
10149 {
10150 addr = (htab->toc_first_sec->output_offset
10151 + htab->toc_first_sec->output_section->vma);
10152 htab->toc_curr = addr;
10153 }
10154
10155 /* toc_curr is the base address of this toc group. Set elf_gp
10156 for the input section to be the offset relative to the
10157 output toc base plus 0x8000. Making the input elf_gp an
10158 offset allows us to move the toc as a whole without
10159 recalculating input elf_gp. */
10160 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10161 off += TOC_BASE_OFF;
10162
10163 /* Die if someone uses a linker script that doesn't keep input
10164 file .toc and .got together. */
10165 if (elf_gp (isec->owner) != 0
10166 && elf_gp (isec->owner) != off)
10167 return FALSE;
10168
10169 elf_gp (isec->owner) = off;
10170 return TRUE;
10171 }
10172
10173 /* During the second pass toc_first_sec points to the start of
10174 a toc group, and toc_curr is used to track the old elf_gp.
10175 We use toc_bfd to ensure we only look at each bfd once. */
10176 if (htab->toc_bfd == isec->owner)
10177 return TRUE;
10178 htab->toc_bfd = isec->owner;
10179
10180 if (htab->toc_first_sec == NULL
10181 || htab->toc_curr != elf_gp (isec->owner))
10182 {
10183 htab->toc_curr = elf_gp (isec->owner);
10184 htab->toc_first_sec = isec;
10185 }
10186 addr = (htab->toc_first_sec->output_offset
10187 + htab->toc_first_sec->output_section->vma);
10188 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10189 elf_gp (isec->owner) = off;
10190
10191 return TRUE;
10192 }
10193
10194 /* Called via elf_link_hash_traverse to merge GOT entries for global
10195 symbol H. */
10196
10197 static bfd_boolean
10198 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10199 {
10200 if (h->root.type == bfd_link_hash_indirect)
10201 return TRUE;
10202
10203 merge_got_entries (&h->got.glist);
10204
10205 return TRUE;
10206 }
10207
10208 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10209 symbol H. */
10210
10211 static bfd_boolean
10212 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10213 {
10214 struct got_entry *gent;
10215
10216 if (h->root.type == bfd_link_hash_indirect)
10217 return TRUE;
10218
10219 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10220 if (!gent->is_indirect)
10221 allocate_got (h, (struct bfd_link_info *) inf, gent);
10222 return TRUE;
10223 }
10224
10225 /* Called on the first multitoc pass after the last call to
10226 ppc64_elf_next_toc_section. This function removes duplicate GOT
10227 entries. */
10228
10229 bfd_boolean
10230 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10231 {
10232 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10233 struct bfd *ibfd, *ibfd2;
10234 bfd_boolean done_something;
10235
10236 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10237
10238 if (!htab->do_multi_toc)
10239 return FALSE;
10240
10241 /* Merge global sym got entries within a toc group. */
10242 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10243
10244 /* And tlsld_got. */
10245 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10246 {
10247 struct got_entry *ent, *ent2;
10248
10249 if (!is_ppc64_elf (ibfd))
10250 continue;
10251
10252 ent = ppc64_tlsld_got (ibfd);
10253 if (!ent->is_indirect
10254 && ent->got.offset != (bfd_vma) -1)
10255 {
10256 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10257 {
10258 if (!is_ppc64_elf (ibfd2))
10259 continue;
10260
10261 ent2 = ppc64_tlsld_got (ibfd2);
10262 if (!ent2->is_indirect
10263 && ent2->got.offset != (bfd_vma) -1
10264 && elf_gp (ibfd2) == elf_gp (ibfd))
10265 {
10266 ent2->is_indirect = TRUE;
10267 ent2->got.ent = ent;
10268 }
10269 }
10270 }
10271 }
10272
10273 /* Zap sizes of got sections. */
10274 htab->reliplt->rawsize = htab->reliplt->size;
10275 htab->reliplt->size -= htab->got_reli_size;
10276 htab->got_reli_size = 0;
10277
10278 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10279 {
10280 asection *got, *relgot;
10281
10282 if (!is_ppc64_elf (ibfd))
10283 continue;
10284
10285 got = ppc64_elf_tdata (ibfd)->got;
10286 if (got != NULL)
10287 {
10288 got->rawsize = got->size;
10289 got->size = 0;
10290 relgot = ppc64_elf_tdata (ibfd)->relgot;
10291 relgot->rawsize = relgot->size;
10292 relgot->size = 0;
10293 }
10294 }
10295
10296 /* Now reallocate the got, local syms first. We don't need to
10297 allocate section contents again since we never increase size. */
10298 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10299 {
10300 struct got_entry **lgot_ents;
10301 struct got_entry **end_lgot_ents;
10302 struct plt_entry **local_plt;
10303 struct plt_entry **end_local_plt;
10304 unsigned char *lgot_masks;
10305 bfd_size_type locsymcount;
10306 Elf_Internal_Shdr *symtab_hdr;
10307 asection *s, *srel;
10308
10309 if (!is_ppc64_elf (ibfd))
10310 continue;
10311
10312 lgot_ents = elf_local_got_ents (ibfd);
10313 if (!lgot_ents)
10314 continue;
10315
10316 symtab_hdr = &elf_symtab_hdr (ibfd);
10317 locsymcount = symtab_hdr->sh_info;
10318 end_lgot_ents = lgot_ents + locsymcount;
10319 local_plt = (struct plt_entry **) end_lgot_ents;
10320 end_local_plt = local_plt + locsymcount;
10321 lgot_masks = (unsigned char *) end_local_plt;
10322 s = ppc64_elf_tdata (ibfd)->got;
10323 srel = ppc64_elf_tdata (ibfd)->relgot;
10324 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10325 {
10326 struct got_entry *ent;
10327
10328 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10329 {
10330 unsigned int num = 1;
10331 ent->got.offset = s->size;
10332 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10333 num = 2;
10334 s->size += num * 8;
10335 if (info->shared)
10336 srel->size += num * sizeof (Elf64_External_Rela);
10337 else if ((*lgot_masks & PLT_IFUNC) != 0)
10338 {
10339 htab->reliplt->size
10340 += num * sizeof (Elf64_External_Rela);
10341 htab->got_reli_size
10342 += num * sizeof (Elf64_External_Rela);
10343 }
10344 }
10345 }
10346 }
10347
10348 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10349
10350 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10351 {
10352 struct got_entry *ent;
10353
10354 if (!is_ppc64_elf (ibfd))
10355 continue;
10356
10357 ent = ppc64_tlsld_got (ibfd);
10358 if (!ent->is_indirect
10359 && ent->got.offset != (bfd_vma) -1)
10360 {
10361 asection *s = ppc64_elf_tdata (ibfd)->got;
10362 ent->got.offset = s->size;
10363 s->size += 16;
10364 if (info->shared)
10365 {
10366 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10367 srel->size += sizeof (Elf64_External_Rela);
10368 }
10369 }
10370 }
10371
10372 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10373 if (!done_something)
10374 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10375 {
10376 asection *got;
10377
10378 if (!is_ppc64_elf (ibfd))
10379 continue;
10380
10381 got = ppc64_elf_tdata (ibfd)->got;
10382 if (got != NULL)
10383 {
10384 done_something = got->rawsize != got->size;
10385 if (done_something)
10386 break;
10387 }
10388 }
10389
10390 if (done_something)
10391 (*htab->layout_sections_again) ();
10392
10393 /* Set up for second pass over toc sections to recalculate elf_gp
10394 on input sections. */
10395 htab->toc_bfd = NULL;
10396 htab->toc_first_sec = NULL;
10397 htab->second_toc_pass = TRUE;
10398 return done_something;
10399 }
10400
10401 /* Called after second pass of multitoc partitioning. */
10402
10403 void
10404 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10405 {
10406 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10407
10408 /* After the second pass, toc_curr tracks the TOC offset used
10409 for code sections below in ppc64_elf_next_input_section. */
10410 htab->toc_curr = TOC_BASE_OFF;
10411 }
10412
10413 /* No toc references were found in ISEC. If the code in ISEC makes no
10414 calls, then there's no need to use toc adjusting stubs when branching
10415 into ISEC. Actually, indirect calls from ISEC are OK as they will
10416 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10417 needed, and 2 if a cyclical call-graph was found but no other reason
10418 for a stub was detected. If called from the top level, a return of
10419 2 means the same as a return of 0. */
10420
10421 static int
10422 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10423 {
10424 int ret;
10425
10426 /* Mark this section as checked. */
10427 isec->call_check_done = 1;
10428
10429 /* We know none of our code bearing sections will need toc stubs. */
10430 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10431 return 0;
10432
10433 if (isec->size == 0)
10434 return 0;
10435
10436 if (isec->output_section == NULL)
10437 return 0;
10438
10439 ret = 0;
10440 if (isec->reloc_count != 0)
10441 {
10442 Elf_Internal_Rela *relstart, *rel;
10443 Elf_Internal_Sym *local_syms;
10444 struct ppc_link_hash_table *htab;
10445
10446 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10447 info->keep_memory);
10448 if (relstart == NULL)
10449 return -1;
10450
10451 /* Look for branches to outside of this section. */
10452 local_syms = NULL;
10453 htab = ppc_hash_table (info);
10454 if (htab == NULL)
10455 return -1;
10456
10457 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10458 {
10459 enum elf_ppc64_reloc_type r_type;
10460 unsigned long r_symndx;
10461 struct elf_link_hash_entry *h;
10462 struct ppc_link_hash_entry *eh;
10463 Elf_Internal_Sym *sym;
10464 asection *sym_sec;
10465 struct _opd_sec_data *opd;
10466 bfd_vma sym_value;
10467 bfd_vma dest;
10468
10469 r_type = ELF64_R_TYPE (rel->r_info);
10470 if (r_type != R_PPC64_REL24
10471 && r_type != R_PPC64_REL14
10472 && r_type != R_PPC64_REL14_BRTAKEN
10473 && r_type != R_PPC64_REL14_BRNTAKEN)
10474 continue;
10475
10476 r_symndx = ELF64_R_SYM (rel->r_info);
10477 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10478 isec->owner))
10479 {
10480 ret = -1;
10481 break;
10482 }
10483
10484 /* Calls to dynamic lib functions go through a plt call stub
10485 that uses r2. */
10486 eh = (struct ppc_link_hash_entry *) h;
10487 if (eh != NULL
10488 && (eh->elf.plt.plist != NULL
10489 || (eh->oh != NULL
10490 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10491 {
10492 ret = 1;
10493 break;
10494 }
10495
10496 if (sym_sec == NULL)
10497 /* Ignore other undefined symbols. */
10498 continue;
10499
10500 /* Assume branches to other sections not included in the
10501 link need stubs too, to cover -R and absolute syms. */
10502 if (sym_sec->output_section == NULL)
10503 {
10504 ret = 1;
10505 break;
10506 }
10507
10508 if (h == NULL)
10509 sym_value = sym->st_value;
10510 else
10511 {
10512 if (h->root.type != bfd_link_hash_defined
10513 && h->root.type != bfd_link_hash_defweak)
10514 abort ();
10515 sym_value = h->root.u.def.value;
10516 }
10517 sym_value += rel->r_addend;
10518
10519 /* If this branch reloc uses an opd sym, find the code section. */
10520 opd = get_opd_info (sym_sec);
10521 if (opd != NULL)
10522 {
10523 if (h == NULL && opd->adjust != NULL)
10524 {
10525 long adjust;
10526
10527 adjust = opd->adjust[sym->st_value / 8];
10528 if (adjust == -1)
10529 /* Assume deleted functions won't ever be called. */
10530 continue;
10531 sym_value += adjust;
10532 }
10533
10534 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10535 if (dest == (bfd_vma) -1)
10536 continue;
10537 }
10538 else
10539 dest = (sym_value
10540 + sym_sec->output_offset
10541 + sym_sec->output_section->vma);
10542
10543 /* Ignore branch to self. */
10544 if (sym_sec == isec)
10545 continue;
10546
10547 /* If the called function uses the toc, we need a stub. */
10548 if (sym_sec->has_toc_reloc
10549 || sym_sec->makes_toc_func_call)
10550 {
10551 ret = 1;
10552 break;
10553 }
10554
10555 /* Assume any branch that needs a long branch stub might in fact
10556 need a plt_branch stub. A plt_branch stub uses r2. */
10557 else if (dest - (isec->output_offset
10558 + isec->output_section->vma
10559 + rel->r_offset) + (1 << 25) >= (2 << 25))
10560 {
10561 ret = 1;
10562 break;
10563 }
10564
10565 /* If calling back to a section in the process of being
10566 tested, we can't say for sure that no toc adjusting stubs
10567 are needed, so don't return zero. */
10568 else if (sym_sec->call_check_in_progress)
10569 ret = 2;
10570
10571 /* Branches to another section that itself doesn't have any TOC
10572 references are OK. Recursively call ourselves to check. */
10573 else if (!sym_sec->call_check_done)
10574 {
10575 int recur;
10576
10577 /* Mark current section as indeterminate, so that other
10578 sections that call back to current won't be marked as
10579 known. */
10580 isec->call_check_in_progress = 1;
10581 recur = toc_adjusting_stub_needed (info, sym_sec);
10582 isec->call_check_in_progress = 0;
10583
10584 if (recur != 0)
10585 {
10586 ret = recur;
10587 if (recur != 2)
10588 break;
10589 }
10590 }
10591 }
10592
10593 if (local_syms != NULL
10594 && (elf_symtab_hdr (isec->owner).contents
10595 != (unsigned char *) local_syms))
10596 free (local_syms);
10597 if (elf_section_data (isec)->relocs != relstart)
10598 free (relstart);
10599 }
10600
10601 if ((ret & 1) == 0
10602 && isec->map_head.s != NULL
10603 && (strcmp (isec->output_section->name, ".init") == 0
10604 || strcmp (isec->output_section->name, ".fini") == 0))
10605 {
10606 if (isec->map_head.s->has_toc_reloc
10607 || isec->map_head.s->makes_toc_func_call)
10608 ret = 1;
10609 else if (!isec->map_head.s->call_check_done)
10610 {
10611 int recur;
10612 isec->call_check_in_progress = 1;
10613 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10614 isec->call_check_in_progress = 0;
10615 if (recur != 0)
10616 ret = recur;
10617 }
10618 }
10619
10620 if (ret == 1)
10621 isec->makes_toc_func_call = 1;
10622
10623 return ret;
10624 }
10625
10626 /* The linker repeatedly calls this function for each input section,
10627 in the order that input sections are linked into output sections.
10628 Build lists of input sections to determine groupings between which
10629 we may insert linker stubs. */
10630
10631 bfd_boolean
10632 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10633 {
10634 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10635
10636 if (htab == NULL)
10637 return FALSE;
10638
10639 if ((isec->output_section->flags & SEC_CODE) != 0
10640 && isec->output_section->index <= htab->top_index)
10641 {
10642 asection **list = htab->input_list + isec->output_section->index;
10643 /* Steal the link_sec pointer for our list. */
10644 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10645 /* This happens to make the list in reverse order,
10646 which is what we want. */
10647 PREV_SEC (isec) = *list;
10648 *list = isec;
10649 }
10650
10651 if (htab->multi_toc_needed)
10652 {
10653 /* If a code section has a function that uses the TOC then we need
10654 to use the right TOC (obviously). Also, make sure that .opd gets
10655 the correct TOC value for R_PPC64_TOC relocs that don't have or
10656 can't find their function symbol (shouldn't ever happen now).
10657 Also specially treat .fixup for the linux kernel. .fixup
10658 contains branches, but only back to the function that hit an
10659 exception. */
10660 if (isec->has_toc_reloc
10661 || (isec->flags & SEC_CODE) == 0
10662 || strcmp (isec->name, ".fixup") == 0)
10663 {
10664 if (elf_gp (isec->owner) != 0)
10665 htab->toc_curr = elf_gp (isec->owner);
10666 }
10667 else
10668 {
10669 if (!isec->call_check_done
10670 && toc_adjusting_stub_needed (info, isec) < 0)
10671 return FALSE;
10672 /* If we make a local call from this section, ie. a branch
10673 without a following nop, then we have no place to put a
10674 toc restoring insn. We must use the same toc group as
10675 the callee.
10676 Testing makes_toc_func_call actually tests for *any*
10677 calls to functions that need a good toc pointer. A more
10678 precise test would be better, as this one will set
10679 incorrect values for pasted .init/.fini fragments.
10680 (Fixed later in check_pasted_section.) */
10681 if (isec->makes_toc_func_call
10682 && elf_gp (isec->owner) != 0)
10683 htab->toc_curr = elf_gp (isec->owner);
10684 }
10685 }
10686
10687 /* Functions that don't use the TOC can belong in any TOC group.
10688 Use the last TOC base. */
10689 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10690 return TRUE;
10691 }
10692
10693 /* Check that all .init and .fini sections use the same toc, if they
10694 have toc relocs. */
10695
10696 static bfd_boolean
10697 check_pasted_section (struct bfd_link_info *info, const char *name)
10698 {
10699 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10700
10701 if (o != NULL)
10702 {
10703 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10704 bfd_vma toc_off = 0;
10705 asection *i;
10706
10707 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10708 if (i->has_toc_reloc)
10709 {
10710 if (toc_off == 0)
10711 toc_off = htab->stub_group[i->id].toc_off;
10712 else if (toc_off != htab->stub_group[i->id].toc_off)
10713 return FALSE;
10714 }
10715
10716 if (toc_off == 0)
10717 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10718 if (i->makes_toc_func_call)
10719 {
10720 toc_off = htab->stub_group[i->id].toc_off;
10721 break;
10722 }
10723
10724 /* Make sure the whole pasted function uses the same toc offset. */
10725 if (toc_off != 0)
10726 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10727 htab->stub_group[i->id].toc_off = toc_off;
10728 }
10729 return TRUE;
10730 }
10731
10732 bfd_boolean
10733 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10734 {
10735 return (check_pasted_section (info, ".init")
10736 & check_pasted_section (info, ".fini"));
10737 }
10738
10739 /* See whether we can group stub sections together. Grouping stub
10740 sections may result in fewer stubs. More importantly, we need to
10741 put all .init* and .fini* stubs at the beginning of the .init or
10742 .fini output sections respectively, because glibc splits the
10743 _init and _fini functions into multiple parts. Putting a stub in
10744 the middle of a function is not a good idea. */
10745
10746 static void
10747 group_sections (struct ppc_link_hash_table *htab,
10748 bfd_size_type stub_group_size,
10749 bfd_boolean stubs_always_before_branch)
10750 {
10751 asection **list;
10752 bfd_size_type stub14_group_size;
10753 bfd_boolean suppress_size_errors;
10754
10755 suppress_size_errors = FALSE;
10756 stub14_group_size = stub_group_size;
10757 if (stub_group_size == 1)
10758 {
10759 /* Default values. */
10760 if (stubs_always_before_branch)
10761 {
10762 stub_group_size = 0x1e00000;
10763 stub14_group_size = 0x7800;
10764 }
10765 else
10766 {
10767 stub_group_size = 0x1c00000;
10768 stub14_group_size = 0x7000;
10769 }
10770 suppress_size_errors = TRUE;
10771 }
10772
10773 list = htab->input_list + htab->top_index;
10774 do
10775 {
10776 asection *tail = *list;
10777 while (tail != NULL)
10778 {
10779 asection *curr;
10780 asection *prev;
10781 bfd_size_type total;
10782 bfd_boolean big_sec;
10783 bfd_vma curr_toc;
10784
10785 curr = tail;
10786 total = tail->size;
10787 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10788 && ppc64_elf_section_data (tail)->has_14bit_branch
10789 ? stub14_group_size : stub_group_size);
10790 if (big_sec && !suppress_size_errors)
10791 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10792 tail->owner, tail);
10793 curr_toc = htab->stub_group[tail->id].toc_off;
10794
10795 while ((prev = PREV_SEC (curr)) != NULL
10796 && ((total += curr->output_offset - prev->output_offset)
10797 < (ppc64_elf_section_data (prev) != NULL
10798 && ppc64_elf_section_data (prev)->has_14bit_branch
10799 ? stub14_group_size : stub_group_size))
10800 && htab->stub_group[prev->id].toc_off == curr_toc)
10801 curr = prev;
10802
10803 /* OK, the size from the start of CURR to the end is less
10804 than stub_group_size and thus can be handled by one stub
10805 section. (or the tail section is itself larger than
10806 stub_group_size, in which case we may be toast.) We
10807 should really be keeping track of the total size of stubs
10808 added here, as stubs contribute to the final output
10809 section size. That's a little tricky, and this way will
10810 only break if stubs added make the total size more than
10811 2^25, ie. for the default stub_group_size, if stubs total
10812 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10813 do
10814 {
10815 prev = PREV_SEC (tail);
10816 /* Set up this stub group. */
10817 htab->stub_group[tail->id].link_sec = curr;
10818 }
10819 while (tail != curr && (tail = prev) != NULL);
10820
10821 /* But wait, there's more! Input sections up to stub_group_size
10822 bytes before the stub section can be handled by it too.
10823 Don't do this if we have a really large section after the
10824 stubs, as adding more stubs increases the chance that
10825 branches may not reach into the stub section. */
10826 if (!stubs_always_before_branch && !big_sec)
10827 {
10828 total = 0;
10829 while (prev != NULL
10830 && ((total += tail->output_offset - prev->output_offset)
10831 < (ppc64_elf_section_data (prev) != NULL
10832 && ppc64_elf_section_data (prev)->has_14bit_branch
10833 ? stub14_group_size : stub_group_size))
10834 && htab->stub_group[prev->id].toc_off == curr_toc)
10835 {
10836 tail = prev;
10837 prev = PREV_SEC (tail);
10838 htab->stub_group[tail->id].link_sec = curr;
10839 }
10840 }
10841 tail = prev;
10842 }
10843 }
10844 while (list-- != htab->input_list);
10845 free (htab->input_list);
10846 #undef PREV_SEC
10847 }
10848
10849 static const unsigned char glink_eh_frame_cie[] =
10850 {
10851 0, 0, 0, 16, /* length. */
10852 0, 0, 0, 0, /* id. */
10853 1, /* CIE version. */
10854 'z', 'R', 0, /* Augmentation string. */
10855 4, /* Code alignment. */
10856 0x78, /* Data alignment. */
10857 65, /* RA reg. */
10858 1, /* Augmentation size. */
10859 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
10860 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
10861 };
10862
10863 /* Determine and set the size of the stub section for a final link.
10864
10865 The basic idea here is to examine all the relocations looking for
10866 PC-relative calls to a target that is unreachable with a "bl"
10867 instruction. */
10868
10869 bfd_boolean
10870 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
10871 bfd_boolean plt_static_chain)
10872 {
10873 bfd_size_type stub_group_size;
10874 bfd_boolean stubs_always_before_branch;
10875 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10876
10877 if (htab == NULL)
10878 return FALSE;
10879
10880 htab->plt_static_chain = plt_static_chain;
10881 stubs_always_before_branch = group_size < 0;
10882 if (group_size < 0)
10883 stub_group_size = -group_size;
10884 else
10885 stub_group_size = group_size;
10886
10887 group_sections (htab, stub_group_size, stubs_always_before_branch);
10888
10889 while (1)
10890 {
10891 bfd *input_bfd;
10892 unsigned int bfd_indx;
10893 asection *stub_sec;
10894
10895 htab->stub_iteration += 1;
10896
10897 for (input_bfd = info->input_bfds, bfd_indx = 0;
10898 input_bfd != NULL;
10899 input_bfd = input_bfd->link_next, bfd_indx++)
10900 {
10901 Elf_Internal_Shdr *symtab_hdr;
10902 asection *section;
10903 Elf_Internal_Sym *local_syms = NULL;
10904
10905 if (!is_ppc64_elf (input_bfd))
10906 continue;
10907
10908 /* We'll need the symbol table in a second. */
10909 symtab_hdr = &elf_symtab_hdr (input_bfd);
10910 if (symtab_hdr->sh_info == 0)
10911 continue;
10912
10913 /* Walk over each section attached to the input bfd. */
10914 for (section = input_bfd->sections;
10915 section != NULL;
10916 section = section->next)
10917 {
10918 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10919
10920 /* If there aren't any relocs, then there's nothing more
10921 to do. */
10922 if ((section->flags & SEC_RELOC) == 0
10923 || (section->flags & SEC_ALLOC) == 0
10924 || (section->flags & SEC_LOAD) == 0
10925 || (section->flags & SEC_CODE) == 0
10926 || section->reloc_count == 0)
10927 continue;
10928
10929 /* If this section is a link-once section that will be
10930 discarded, then don't create any stubs. */
10931 if (section->output_section == NULL
10932 || section->output_section->owner != info->output_bfd)
10933 continue;
10934
10935 /* Get the relocs. */
10936 internal_relocs
10937 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10938 info->keep_memory);
10939 if (internal_relocs == NULL)
10940 goto error_ret_free_local;
10941
10942 /* Now examine each relocation. */
10943 irela = internal_relocs;
10944 irelaend = irela + section->reloc_count;
10945 for (; irela < irelaend; irela++)
10946 {
10947 enum elf_ppc64_reloc_type r_type;
10948 unsigned int r_indx;
10949 enum ppc_stub_type stub_type;
10950 struct ppc_stub_hash_entry *stub_entry;
10951 asection *sym_sec, *code_sec;
10952 bfd_vma sym_value, code_value;
10953 bfd_vma destination;
10954 bfd_boolean ok_dest;
10955 struct ppc_link_hash_entry *hash;
10956 struct ppc_link_hash_entry *fdh;
10957 struct elf_link_hash_entry *h;
10958 Elf_Internal_Sym *sym;
10959 char *stub_name;
10960 const asection *id_sec;
10961 struct _opd_sec_data *opd;
10962 struct plt_entry *plt_ent;
10963
10964 r_type = ELF64_R_TYPE (irela->r_info);
10965 r_indx = ELF64_R_SYM (irela->r_info);
10966
10967 if (r_type >= R_PPC64_max)
10968 {
10969 bfd_set_error (bfd_error_bad_value);
10970 goto error_ret_free_internal;
10971 }
10972
10973 /* Only look for stubs on branch instructions. */
10974 if (r_type != R_PPC64_REL24
10975 && r_type != R_PPC64_REL14
10976 && r_type != R_PPC64_REL14_BRTAKEN
10977 && r_type != R_PPC64_REL14_BRNTAKEN)
10978 continue;
10979
10980 /* Now determine the call target, its name, value,
10981 section. */
10982 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10983 r_indx, input_bfd))
10984 goto error_ret_free_internal;
10985 hash = (struct ppc_link_hash_entry *) h;
10986
10987 ok_dest = FALSE;
10988 fdh = NULL;
10989 sym_value = 0;
10990 if (hash == NULL)
10991 {
10992 sym_value = sym->st_value;
10993 ok_dest = TRUE;
10994 }
10995 else if (hash->elf.root.type == bfd_link_hash_defined
10996 || hash->elf.root.type == bfd_link_hash_defweak)
10997 {
10998 sym_value = hash->elf.root.u.def.value;
10999 if (sym_sec->output_section != NULL)
11000 ok_dest = TRUE;
11001 }
11002 else if (hash->elf.root.type == bfd_link_hash_undefweak
11003 || hash->elf.root.type == bfd_link_hash_undefined)
11004 {
11005 /* Recognise an old ABI func code entry sym, and
11006 use the func descriptor sym instead if it is
11007 defined. */
11008 if (hash->elf.root.root.string[0] == '.'
11009 && (fdh = lookup_fdh (hash, htab)) != NULL)
11010 {
11011 if (fdh->elf.root.type == bfd_link_hash_defined
11012 || fdh->elf.root.type == bfd_link_hash_defweak)
11013 {
11014 sym_sec = fdh->elf.root.u.def.section;
11015 sym_value = fdh->elf.root.u.def.value;
11016 if (sym_sec->output_section != NULL)
11017 ok_dest = TRUE;
11018 }
11019 else
11020 fdh = NULL;
11021 }
11022 }
11023 else
11024 {
11025 bfd_set_error (bfd_error_bad_value);
11026 goto error_ret_free_internal;
11027 }
11028
11029 destination = 0;
11030 if (ok_dest)
11031 {
11032 sym_value += irela->r_addend;
11033 destination = (sym_value
11034 + sym_sec->output_offset
11035 + sym_sec->output_section->vma);
11036 }
11037
11038 code_sec = sym_sec;
11039 code_value = sym_value;
11040 opd = get_opd_info (sym_sec);
11041 if (opd != NULL)
11042 {
11043 bfd_vma dest;
11044
11045 if (hash == NULL && opd->adjust != NULL)
11046 {
11047 long adjust = opd->adjust[sym_value / 8];
11048 if (adjust == -1)
11049 continue;
11050 code_value += adjust;
11051 sym_value += adjust;
11052 }
11053 dest = opd_entry_value (sym_sec, sym_value,
11054 &code_sec, &code_value);
11055 if (dest != (bfd_vma) -1)
11056 {
11057 destination = dest;
11058 if (fdh != NULL)
11059 {
11060 /* Fixup old ABI sym to point at code
11061 entry. */
11062 hash->elf.root.type = bfd_link_hash_defweak;
11063 hash->elf.root.u.def.section = code_sec;
11064 hash->elf.root.u.def.value = code_value;
11065 }
11066 }
11067 }
11068
11069 /* Determine what (if any) linker stub is needed. */
11070 plt_ent = NULL;
11071 stub_type = ppc_type_of_stub (section, irela, &hash,
11072 &plt_ent, destination);
11073
11074 if (stub_type != ppc_stub_plt_call)
11075 {
11076 /* Check whether we need a TOC adjusting stub.
11077 Since the linker pastes together pieces from
11078 different object files when creating the
11079 _init and _fini functions, it may be that a
11080 call to what looks like a local sym is in
11081 fact a call needing a TOC adjustment. */
11082 if (code_sec != NULL
11083 && code_sec->output_section != NULL
11084 && (htab->stub_group[code_sec->id].toc_off
11085 != htab->stub_group[section->id].toc_off)
11086 && (code_sec->has_toc_reloc
11087 || code_sec->makes_toc_func_call))
11088 stub_type = ppc_stub_long_branch_r2off;
11089 }
11090
11091 if (stub_type == ppc_stub_none)
11092 continue;
11093
11094 /* __tls_get_addr calls might be eliminated. */
11095 if (stub_type != ppc_stub_plt_call
11096 && hash != NULL
11097 && (hash == htab->tls_get_addr
11098 || hash == htab->tls_get_addr_fd)
11099 && section->has_tls_reloc
11100 && irela != internal_relocs)
11101 {
11102 /* Get tls info. */
11103 unsigned char *tls_mask;
11104
11105 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11106 irela - 1, input_bfd))
11107 goto error_ret_free_internal;
11108 if (*tls_mask != 0)
11109 continue;
11110 }
11111
11112 /* Support for grouping stub sections. */
11113 id_sec = htab->stub_group[section->id].link_sec;
11114
11115 /* Get the name of this stub. */
11116 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11117 if (!stub_name)
11118 goto error_ret_free_internal;
11119
11120 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11121 stub_name, FALSE, FALSE);
11122 if (stub_entry != NULL)
11123 {
11124 /* The proper stub has already been created. */
11125 free (stub_name);
11126 continue;
11127 }
11128
11129 stub_entry = ppc_add_stub (stub_name, section, info);
11130 if (stub_entry == NULL)
11131 {
11132 free (stub_name);
11133 error_ret_free_internal:
11134 if (elf_section_data (section)->relocs == NULL)
11135 free (internal_relocs);
11136 error_ret_free_local:
11137 if (local_syms != NULL
11138 && (symtab_hdr->contents
11139 != (unsigned char *) local_syms))
11140 free (local_syms);
11141 return FALSE;
11142 }
11143
11144 stub_entry->stub_type = stub_type;
11145 if (stub_type != ppc_stub_plt_call)
11146 {
11147 stub_entry->target_value = code_value;
11148 stub_entry->target_section = code_sec;
11149 }
11150 else
11151 {
11152 stub_entry->target_value = sym_value;
11153 stub_entry->target_section = sym_sec;
11154 }
11155 stub_entry->h = hash;
11156 stub_entry->plt_ent = plt_ent;
11157 stub_entry->addend = irela->r_addend;
11158
11159 if (stub_entry->h != NULL)
11160 htab->stub_globals += 1;
11161 }
11162
11163 /* We're done with the internal relocs, free them. */
11164 if (elf_section_data (section)->relocs != internal_relocs)
11165 free (internal_relocs);
11166 }
11167
11168 if (local_syms != NULL
11169 && symtab_hdr->contents != (unsigned char *) local_syms)
11170 {
11171 if (!info->keep_memory)
11172 free (local_syms);
11173 else
11174 symtab_hdr->contents = (unsigned char *) local_syms;
11175 }
11176 }
11177
11178 /* We may have added some stubs. Find out the new size of the
11179 stub sections. */
11180 for (stub_sec = htab->stub_bfd->sections;
11181 stub_sec != NULL;
11182 stub_sec = stub_sec->next)
11183 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11184 {
11185 stub_sec->rawsize = stub_sec->size;
11186 stub_sec->size = 0;
11187 stub_sec->reloc_count = 0;
11188 stub_sec->flags &= ~SEC_RELOC;
11189 }
11190
11191 htab->brlt->size = 0;
11192 htab->brlt->reloc_count = 0;
11193 htab->brlt->flags &= ~SEC_RELOC;
11194 if (htab->relbrlt != NULL)
11195 htab->relbrlt->size = 0;
11196
11197 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11198
11199 if (info->emitrelocations
11200 && htab->glink != NULL && htab->glink->size != 0)
11201 {
11202 htab->glink->reloc_count = 1;
11203 htab->glink->flags |= SEC_RELOC;
11204 }
11205
11206 if (htab->glink_eh_frame != NULL
11207 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11208 && (htab->glink_eh_frame->flags & SEC_EXCLUDE) == 0)
11209 {
11210 bfd_size_type size = 0;
11211
11212 for (stub_sec = htab->stub_bfd->sections;
11213 stub_sec != NULL;
11214 stub_sec = stub_sec->next)
11215 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11216 size += 20;
11217 if (htab->glink != NULL && htab->glink->size != 0)
11218 size += 24;
11219 if (size != 0)
11220 size += sizeof (glink_eh_frame_cie);
11221 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11222 htab->glink_eh_frame->size = size;
11223 }
11224
11225 for (stub_sec = htab->stub_bfd->sections;
11226 stub_sec != NULL;
11227 stub_sec = stub_sec->next)
11228 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11229 && stub_sec->rawsize != stub_sec->size)
11230 break;
11231
11232 /* Exit from this loop when no stubs have been added, and no stubs
11233 have changed size. */
11234 if (stub_sec == NULL
11235 && (htab->glink_eh_frame == NULL
11236 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11237 break;
11238
11239 /* Ask the linker to do its stuff. */
11240 (*htab->layout_sections_again) ();
11241 }
11242
11243 /* It would be nice to strip htab->brlt from the output if the
11244 section is empty, but it's too late. If we strip sections here,
11245 the dynamic symbol table is corrupted since the section symbol
11246 for the stripped section isn't written. */
11247
11248 return TRUE;
11249 }
11250
11251 /* Called after we have determined section placement. If sections
11252 move, we'll be called again. Provide a value for TOCstart. */
11253
11254 bfd_vma
11255 ppc64_elf_toc (bfd *obfd)
11256 {
11257 asection *s;
11258 bfd_vma TOCstart;
11259
11260 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11261 order. The TOC starts where the first of these sections starts. */
11262 s = bfd_get_section_by_name (obfd, ".got");
11263 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11264 s = bfd_get_section_by_name (obfd, ".toc");
11265 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11266 s = bfd_get_section_by_name (obfd, ".tocbss");
11267 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11268 s = bfd_get_section_by_name (obfd, ".plt");
11269 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11270 {
11271 /* This may happen for
11272 o references to TOC base (SYM@toc / TOC[tc0]) without a
11273 .toc directive
11274 o bad linker script
11275 o --gc-sections and empty TOC sections
11276
11277 FIXME: Warn user? */
11278
11279 /* Look for a likely section. We probably won't even be
11280 using TOCstart. */
11281 for (s = obfd->sections; s != NULL; s = s->next)
11282 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11283 | SEC_EXCLUDE))
11284 == (SEC_ALLOC | SEC_SMALL_DATA))
11285 break;
11286 if (s == NULL)
11287 for (s = obfd->sections; s != NULL; s = s->next)
11288 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11289 == (SEC_ALLOC | SEC_SMALL_DATA))
11290 break;
11291 if (s == NULL)
11292 for (s = obfd->sections; s != NULL; s = s->next)
11293 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11294 == SEC_ALLOC)
11295 break;
11296 if (s == NULL)
11297 for (s = obfd->sections; s != NULL; s = s->next)
11298 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11299 break;
11300 }
11301
11302 TOCstart = 0;
11303 if (s != NULL)
11304 TOCstart = s->output_section->vma + s->output_offset;
11305
11306 return TOCstart;
11307 }
11308
11309 /* Build all the stubs associated with the current output file.
11310 The stubs are kept in a hash table attached to the main linker
11311 hash table. This function is called via gldelf64ppc_finish. */
11312
11313 bfd_boolean
11314 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11315 struct bfd_link_info *info,
11316 char **stats)
11317 {
11318 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11319 asection *stub_sec;
11320 bfd_byte *p;
11321 int stub_sec_count = 0;
11322
11323 if (htab == NULL)
11324 return FALSE;
11325
11326 htab->emit_stub_syms = emit_stub_syms;
11327
11328 /* Allocate memory to hold the linker stubs. */
11329 for (stub_sec = htab->stub_bfd->sections;
11330 stub_sec != NULL;
11331 stub_sec = stub_sec->next)
11332 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11333 && stub_sec->size != 0)
11334 {
11335 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11336 if (stub_sec->contents == NULL)
11337 return FALSE;
11338 /* We want to check that built size is the same as calculated
11339 size. rawsize is a convenient location to use. */
11340 stub_sec->rawsize = stub_sec->size;
11341 stub_sec->size = 0;
11342 }
11343
11344 if (htab->glink != NULL && htab->glink->size != 0)
11345 {
11346 unsigned int indx;
11347 bfd_vma plt0;
11348
11349 /* Build the .glink plt call stub. */
11350 if (htab->emit_stub_syms)
11351 {
11352 struct elf_link_hash_entry *h;
11353 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11354 TRUE, FALSE, FALSE);
11355 if (h == NULL)
11356 return FALSE;
11357 if (h->root.type == bfd_link_hash_new)
11358 {
11359 h->root.type = bfd_link_hash_defined;
11360 h->root.u.def.section = htab->glink;
11361 h->root.u.def.value = 8;
11362 h->ref_regular = 1;
11363 h->def_regular = 1;
11364 h->ref_regular_nonweak = 1;
11365 h->forced_local = 1;
11366 h->non_elf = 0;
11367 }
11368 }
11369 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11370 if (info->emitrelocations)
11371 {
11372 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11373 if (r == NULL)
11374 return FALSE;
11375 r->r_offset = (htab->glink->output_offset
11376 + htab->glink->output_section->vma);
11377 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11378 r->r_addend = plt0;
11379 }
11380 p = htab->glink->contents;
11381 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11382 bfd_put_64 (htab->glink->owner, plt0, p);
11383 p += 8;
11384 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11385 p += 4;
11386 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11387 p += 4;
11388 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11389 p += 4;
11390 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11391 p += 4;
11392 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11393 p += 4;
11394 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11395 p += 4;
11396 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11397 p += 4;
11398 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11399 p += 4;
11400 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11401 p += 4;
11402 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11403 p += 4;
11404 bfd_put_32 (htab->glink->owner, BCTR, p);
11405 p += 4;
11406 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11407 {
11408 bfd_put_32 (htab->glink->owner, NOP, p);
11409 p += 4;
11410 }
11411
11412 /* Build the .glink lazy link call stubs. */
11413 indx = 0;
11414 while (p < htab->glink->contents + htab->glink->size)
11415 {
11416 if (indx < 0x8000)
11417 {
11418 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11419 p += 4;
11420 }
11421 else
11422 {
11423 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11424 p += 4;
11425 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11426 p += 4;
11427 }
11428 bfd_put_32 (htab->glink->owner,
11429 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11430 indx++;
11431 p += 4;
11432 }
11433 htab->glink->rawsize = p - htab->glink->contents;
11434 }
11435
11436 if (htab->brlt->size != 0)
11437 {
11438 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11439 htab->brlt->size);
11440 if (htab->brlt->contents == NULL)
11441 return FALSE;
11442 }
11443 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11444 {
11445 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11446 htab->relbrlt->size);
11447 if (htab->relbrlt->contents == NULL)
11448 return FALSE;
11449 }
11450
11451 if (htab->glink_eh_frame != NULL
11452 && htab->glink_eh_frame->size != 0)
11453 {
11454 bfd_vma val;
11455
11456 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
11457 if (p == NULL)
11458 return FALSE;
11459 htab->glink_eh_frame->contents = p;
11460
11461 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11462
11463 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
11464 /* CIE length (rewrite in case little-endian). */
11465 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
11466 p += sizeof (glink_eh_frame_cie);
11467
11468 for (stub_sec = htab->stub_bfd->sections;
11469 stub_sec != NULL;
11470 stub_sec = stub_sec->next)
11471 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11472 {
11473 /* FDE length. */
11474 bfd_put_32 (htab->elf.dynobj, 16, p);
11475 p += 4;
11476 /* CIE pointer. */
11477 val = p - htab->glink_eh_frame->contents;
11478 bfd_put_32 (htab->elf.dynobj, val, p);
11479 p += 4;
11480 /* Offset to stub section. */
11481 val = (stub_sec->output_section->vma
11482 + stub_sec->output_offset);
11483 val -= (htab->glink_eh_frame->output_section->vma
11484 + htab->glink_eh_frame->output_offset);
11485 val -= p - htab->glink_eh_frame->contents;
11486 if (val + 0x80000000 > 0xffffffff)
11487 {
11488 info->callbacks->einfo
11489 (_("%s offset too large for .eh_frame sdata4 encoding"),
11490 stub_sec->name);
11491 return FALSE;
11492 }
11493 bfd_put_32 (htab->elf.dynobj, val, p);
11494 p += 4;
11495 /* stub section size. */
11496 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
11497 p += 4;
11498 /* Augmentation. */
11499 p += 1;
11500 /* Pad. */
11501 p += 3;
11502 }
11503 if (htab->glink != NULL && htab->glink->size != 0)
11504 {
11505 /* FDE length. */
11506 bfd_put_32 (htab->elf.dynobj, 20, p);
11507 p += 4;
11508 /* CIE pointer. */
11509 val = p - htab->glink_eh_frame->contents;
11510 bfd_put_32 (htab->elf.dynobj, val, p);
11511 p += 4;
11512 /* Offset to .glink. */
11513 val = (htab->glink->output_section->vma
11514 + htab->glink->output_offset
11515 + 8);
11516 val -= (htab->glink_eh_frame->output_section->vma
11517 + htab->glink_eh_frame->output_offset);
11518 val -= p - htab->glink_eh_frame->contents;
11519 if (val + 0x80000000 > 0xffffffff)
11520 {
11521 info->callbacks->einfo
11522 (_("%s offset too large for .eh_frame sdata4 encoding"),
11523 htab->glink->name);
11524 return FALSE;
11525 }
11526 bfd_put_32 (htab->elf.dynobj, val, p);
11527 p += 4;
11528 /* .glink size. */
11529 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
11530 p += 4;
11531 /* Augmentation. */
11532 p += 1;
11533
11534 *p++ = DW_CFA_advance_loc + 1;
11535 *p++ = DW_CFA_register;
11536 *p++ = 65;
11537 *p++ = 12;
11538 *p++ = DW_CFA_advance_loc + 4;
11539 *p++ = DW_CFA_restore_extended;
11540 *p++ = 65;
11541 }
11542 htab->glink_eh_frame->size = p - htab->glink_eh_frame->contents;
11543 }
11544
11545 /* Build the stubs as directed by the stub hash table. */
11546 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11547
11548 if (htab->relbrlt != NULL)
11549 htab->relbrlt->reloc_count = 0;
11550
11551 for (stub_sec = htab->stub_bfd->sections;
11552 stub_sec != NULL;
11553 stub_sec = stub_sec->next)
11554 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11555 {
11556 stub_sec_count += 1;
11557 if (stub_sec->rawsize != stub_sec->size)
11558 break;
11559 }
11560
11561 if (stub_sec != NULL
11562 || htab->glink->rawsize != htab->glink->size
11563 || (htab->glink_eh_frame != NULL
11564 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
11565 {
11566 htab->stub_error = TRUE;
11567 info->callbacks->einfo (_("stubs don't match calculated size\n"));
11568 }
11569
11570 if (htab->stub_error)
11571 return FALSE;
11572
11573 if (stats != NULL)
11574 {
11575 *stats = bfd_malloc (500);
11576 if (*stats == NULL)
11577 return FALSE;
11578
11579 sprintf (*stats, _("linker stubs in %u group%s\n"
11580 " branch %lu\n"
11581 " toc adjust %lu\n"
11582 " long branch %lu\n"
11583 " long toc adj %lu\n"
11584 " plt call %lu"),
11585 stub_sec_count,
11586 stub_sec_count == 1 ? "" : "s",
11587 htab->stub_count[ppc_stub_long_branch - 1],
11588 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11589 htab->stub_count[ppc_stub_plt_branch - 1],
11590 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11591 htab->stub_count[ppc_stub_plt_call - 1]);
11592 }
11593 return TRUE;
11594 }
11595
11596 /* This function undoes the changes made by add_symbol_adjust. */
11597
11598 static bfd_boolean
11599 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11600 {
11601 struct ppc_link_hash_entry *eh;
11602
11603 if (h->root.type == bfd_link_hash_indirect)
11604 return TRUE;
11605
11606 eh = (struct ppc_link_hash_entry *) h;
11607 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11608 return TRUE;
11609
11610 eh->elf.root.type = bfd_link_hash_undefined;
11611 return TRUE;
11612 }
11613
11614 void
11615 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11616 {
11617 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11618
11619 if (htab != NULL)
11620 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11621 }
11622
11623 /* What to do when ld finds relocations against symbols defined in
11624 discarded sections. */
11625
11626 static unsigned int
11627 ppc64_elf_action_discarded (asection *sec)
11628 {
11629 if (strcmp (".opd", sec->name) == 0)
11630 return 0;
11631
11632 if (strcmp (".toc", sec->name) == 0)
11633 return 0;
11634
11635 if (strcmp (".toc1", sec->name) == 0)
11636 return 0;
11637
11638 return _bfd_elf_default_action_discarded (sec);
11639 }
11640
11641 /* REL points to a low-part reloc on a largetoc instruction sequence.
11642 Find the matching high-part reloc instruction and verify that it
11643 is addis REG,x,imm. If so, set *REG to x and return a pointer to
11644 the high-part reloc. */
11645
11646 static const Elf_Internal_Rela *
11647 ha_reloc_match (const Elf_Internal_Rela *relocs,
11648 const Elf_Internal_Rela *rel,
11649 unsigned int *reg,
11650 bfd_boolean match_addend,
11651 const bfd *input_bfd,
11652 const bfd_byte *contents)
11653 {
11654 enum elf_ppc64_reloc_type r_type, r_type_ha;
11655 bfd_vma r_info_ha, r_addend;
11656
11657 r_type = ELF64_R_TYPE (rel->r_info);
11658 switch (r_type)
11659 {
11660 case R_PPC64_GOT_TLSLD16_LO:
11661 case R_PPC64_GOT_TLSGD16_LO:
11662 case R_PPC64_GOT_TPREL16_LO_DS:
11663 case R_PPC64_GOT_DTPREL16_LO_DS:
11664 case R_PPC64_GOT16_LO:
11665 case R_PPC64_TOC16_LO:
11666 r_type_ha = r_type + 2;
11667 break;
11668 case R_PPC64_GOT16_LO_DS:
11669 r_type_ha = R_PPC64_GOT16_HA;
11670 break;
11671 case R_PPC64_TOC16_LO_DS:
11672 r_type_ha = R_PPC64_TOC16_HA;
11673 break;
11674 default:
11675 abort ();
11676 }
11677 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11678 r_addend = rel->r_addend;
11679
11680 while (--rel >= relocs)
11681 if (rel->r_info == r_info_ha
11682 && (!match_addend
11683 || rel->r_addend == r_addend))
11684 {
11685 const bfd_byte *p = contents + (rel->r_offset & ~3);
11686 unsigned int insn = bfd_get_32 (input_bfd, p);
11687 if ((insn & (0x3f << 26)) == (15u << 26) /* addis rt,x,imm */
11688 && (insn & (0x1f << 21)) == (*reg << 21))
11689 {
11690 *reg = (insn >> 16) & 0x1f;
11691 return rel;
11692 }
11693 break;
11694 }
11695 return NULL;
11696 }
11697
11698 /* The RELOCATE_SECTION function is called by the ELF backend linker
11699 to handle the relocations for a section.
11700
11701 The relocs are always passed as Rela structures; if the section
11702 actually uses Rel structures, the r_addend field will always be
11703 zero.
11704
11705 This function is responsible for adjust the section contents as
11706 necessary, and (if using Rela relocs and generating a
11707 relocatable output file) adjusting the reloc addend as
11708 necessary.
11709
11710 This function does not have to worry about setting the reloc
11711 address or the reloc symbol index.
11712
11713 LOCAL_SYMS is a pointer to the swapped in local symbols.
11714
11715 LOCAL_SECTIONS is an array giving the section in the input file
11716 corresponding to the st_shndx field of each local symbol.
11717
11718 The global hash table entry for the global symbols can be found
11719 via elf_sym_hashes (input_bfd).
11720
11721 When generating relocatable output, this function must handle
11722 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11723 going to be the section symbol corresponding to the output
11724 section, which means that the addend must be adjusted
11725 accordingly. */
11726
11727 static bfd_boolean
11728 ppc64_elf_relocate_section (bfd *output_bfd,
11729 struct bfd_link_info *info,
11730 bfd *input_bfd,
11731 asection *input_section,
11732 bfd_byte *contents,
11733 Elf_Internal_Rela *relocs,
11734 Elf_Internal_Sym *local_syms,
11735 asection **local_sections)
11736 {
11737 struct ppc_link_hash_table *htab;
11738 Elf_Internal_Shdr *symtab_hdr;
11739 struct elf_link_hash_entry **sym_hashes;
11740 Elf_Internal_Rela *rel;
11741 Elf_Internal_Rela *relend;
11742 Elf_Internal_Rela outrel;
11743 bfd_byte *loc;
11744 struct got_entry **local_got_ents;
11745 unsigned char *ha_opt;
11746 bfd_vma TOCstart;
11747 bfd_boolean no_ha_opt;
11748 bfd_boolean ret = TRUE;
11749 bfd_boolean is_opd;
11750 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11751 bfd_boolean is_power4 = FALSE;
11752 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11753
11754 /* Initialize howto table if needed. */
11755 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11756 ppc_howto_init ();
11757
11758 htab = ppc_hash_table (info);
11759 if (htab == NULL)
11760 return FALSE;
11761
11762 /* Don't relocate stub sections. */
11763 if (input_section->owner == htab->stub_bfd)
11764 return TRUE;
11765
11766 BFD_ASSERT (is_ppc64_elf (input_bfd));
11767
11768 local_got_ents = elf_local_got_ents (input_bfd);
11769 TOCstart = elf_gp (output_bfd);
11770 symtab_hdr = &elf_symtab_hdr (input_bfd);
11771 sym_hashes = elf_sym_hashes (input_bfd);
11772 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11773 ha_opt = NULL;
11774 no_ha_opt = FALSE;
11775
11776 rel = relocs;
11777 relend = relocs + input_section->reloc_count;
11778 for (; rel < relend; rel++)
11779 {
11780 enum elf_ppc64_reloc_type r_type;
11781 bfd_vma addend, orig_addend;
11782 bfd_reloc_status_type r;
11783 Elf_Internal_Sym *sym;
11784 asection *sec;
11785 struct elf_link_hash_entry *h_elf;
11786 struct ppc_link_hash_entry *h;
11787 struct ppc_link_hash_entry *fdh;
11788 const char *sym_name;
11789 unsigned long r_symndx, toc_symndx;
11790 bfd_vma toc_addend;
11791 unsigned char tls_mask, tls_gd, tls_type;
11792 unsigned char sym_type;
11793 bfd_vma relocation;
11794 bfd_boolean unresolved_reloc;
11795 bfd_boolean warned;
11796 unsigned int insn;
11797 unsigned int mask;
11798 struct ppc_stub_hash_entry *stub_entry;
11799 bfd_vma max_br_offset;
11800 bfd_vma from;
11801
11802 r_type = ELF64_R_TYPE (rel->r_info);
11803 r_symndx = ELF64_R_SYM (rel->r_info);
11804
11805 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11806 symbol of the previous ADDR64 reloc. The symbol gives us the
11807 proper TOC base to use. */
11808 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11809 && rel != relocs
11810 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11811 && is_opd)
11812 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11813
11814 sym = NULL;
11815 sec = NULL;
11816 h_elf = NULL;
11817 sym_name = NULL;
11818 unresolved_reloc = FALSE;
11819 warned = FALSE;
11820 orig_addend = rel->r_addend;
11821
11822 if (r_symndx < symtab_hdr->sh_info)
11823 {
11824 /* It's a local symbol. */
11825 struct _opd_sec_data *opd;
11826
11827 sym = local_syms + r_symndx;
11828 sec = local_sections[r_symndx];
11829 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11830 sym_type = ELF64_ST_TYPE (sym->st_info);
11831 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11832 opd = get_opd_info (sec);
11833 if (opd != NULL && opd->adjust != NULL)
11834 {
11835 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11836 if (adjust == -1)
11837 relocation = 0;
11838 else
11839 {
11840 /* If this is a relocation against the opd section sym
11841 and we have edited .opd, adjust the reloc addend so
11842 that ld -r and ld --emit-relocs output is correct.
11843 If it is a reloc against some other .opd symbol,
11844 then the symbol value will be adjusted later. */
11845 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11846 rel->r_addend += adjust;
11847 else
11848 relocation += adjust;
11849 }
11850 }
11851 }
11852 else
11853 {
11854 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11855 r_symndx, symtab_hdr, sym_hashes,
11856 h_elf, sec, relocation,
11857 unresolved_reloc, warned);
11858 sym_name = h_elf->root.root.string;
11859 sym_type = h_elf->type;
11860 }
11861 h = (struct ppc_link_hash_entry *) h_elf;
11862
11863 if (sec != NULL && elf_discarded_section (sec))
11864 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
11865 rel, relend,
11866 ppc64_elf_howto_table[r_type],
11867 contents);
11868
11869 if (info->relocatable)
11870 continue;
11871
11872 /* TLS optimizations. Replace instruction sequences and relocs
11873 based on information we collected in tls_optimize. We edit
11874 RELOCS so that --emit-relocs will output something sensible
11875 for the final instruction stream. */
11876 tls_mask = 0;
11877 tls_gd = 0;
11878 toc_symndx = 0;
11879 if (h != NULL)
11880 tls_mask = h->tls_mask;
11881 else if (local_got_ents != NULL)
11882 {
11883 struct plt_entry **local_plt = (struct plt_entry **)
11884 (local_got_ents + symtab_hdr->sh_info);
11885 unsigned char *lgot_masks = (unsigned char *)
11886 (local_plt + symtab_hdr->sh_info);
11887 tls_mask = lgot_masks[r_symndx];
11888 }
11889 if (tls_mask == 0
11890 && (r_type == R_PPC64_TLS
11891 || r_type == R_PPC64_TLSGD
11892 || r_type == R_PPC64_TLSLD))
11893 {
11894 /* Check for toc tls entries. */
11895 unsigned char *toc_tls;
11896
11897 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11898 &local_syms, rel, input_bfd))
11899 return FALSE;
11900
11901 if (toc_tls)
11902 tls_mask = *toc_tls;
11903 }
11904
11905 /* Check that tls relocs are used with tls syms, and non-tls
11906 relocs are used with non-tls syms. */
11907 if (r_symndx != STN_UNDEF
11908 && r_type != R_PPC64_NONE
11909 && (h == NULL
11910 || h->elf.root.type == bfd_link_hash_defined
11911 || h->elf.root.type == bfd_link_hash_defweak)
11912 && (IS_PPC64_TLS_RELOC (r_type)
11913 != (sym_type == STT_TLS
11914 || (sym_type == STT_SECTION
11915 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11916 {
11917 if (tls_mask != 0
11918 && (r_type == R_PPC64_TLS
11919 || r_type == R_PPC64_TLSGD
11920 || r_type == R_PPC64_TLSLD))
11921 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11922 ;
11923 else
11924 info->callbacks->einfo
11925 (!IS_PPC64_TLS_RELOC (r_type)
11926 ? _("%H: %s used with TLS symbol %s\n")
11927 : _("%H: %s used with non-TLS symbol %s\n"),
11928 input_bfd, input_section, rel->r_offset,
11929 ppc64_elf_howto_table[r_type]->name,
11930 sym_name);
11931 }
11932
11933 /* Ensure reloc mapping code below stays sane. */
11934 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11935 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11936 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11937 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11938 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11939 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11940 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11941 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11942 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11943 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11944 abort ();
11945
11946 switch (r_type)
11947 {
11948 default:
11949 break;
11950
11951 case R_PPC64_LO_DS_OPT:
11952 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11953 if ((insn & (0x3f << 26)) != 58u << 26)
11954 abort ();
11955 insn += (14u << 26) - (58u << 26);
11956 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11957 r_type = R_PPC64_TOC16_LO;
11958 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11959 break;
11960
11961 case R_PPC64_TOC16:
11962 case R_PPC64_TOC16_LO:
11963 case R_PPC64_TOC16_DS:
11964 case R_PPC64_TOC16_LO_DS:
11965 {
11966 /* Check for toc tls entries. */
11967 unsigned char *toc_tls;
11968 int retval;
11969
11970 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11971 &local_syms, rel, input_bfd);
11972 if (retval == 0)
11973 return FALSE;
11974
11975 if (toc_tls)
11976 {
11977 tls_mask = *toc_tls;
11978 if (r_type == R_PPC64_TOC16_DS
11979 || r_type == R_PPC64_TOC16_LO_DS)
11980 {
11981 if (tls_mask != 0
11982 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11983 goto toctprel;
11984 }
11985 else
11986 {
11987 /* If we found a GD reloc pair, then we might be
11988 doing a GD->IE transition. */
11989 if (retval == 2)
11990 {
11991 tls_gd = TLS_TPRELGD;
11992 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11993 goto tls_ldgd_opt;
11994 }
11995 else if (retval == 3)
11996 {
11997 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11998 goto tls_ldgd_opt;
11999 }
12000 }
12001 }
12002 }
12003 break;
12004
12005 case R_PPC64_GOT_TPREL16_HI:
12006 case R_PPC64_GOT_TPREL16_HA:
12007 if (tls_mask != 0
12008 && (tls_mask & TLS_TPREL) == 0)
12009 {
12010 rel->r_offset -= d_offset;
12011 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12012 r_type = R_PPC64_NONE;
12013 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12014 }
12015 break;
12016
12017 case R_PPC64_GOT_TPREL16_DS:
12018 case R_PPC64_GOT_TPREL16_LO_DS:
12019 if (tls_mask != 0
12020 && (tls_mask & TLS_TPREL) == 0)
12021 {
12022 toctprel:
12023 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12024 insn &= 31 << 21;
12025 insn |= 0x3c0d0000; /* addis 0,13,0 */
12026 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12027 r_type = R_PPC64_TPREL16_HA;
12028 if (toc_symndx != 0)
12029 {
12030 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12031 rel->r_addend = toc_addend;
12032 /* We changed the symbol. Start over in order to
12033 get h, sym, sec etc. right. */
12034 rel--;
12035 continue;
12036 }
12037 else
12038 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12039 }
12040 break;
12041
12042 case R_PPC64_TLS:
12043 if (tls_mask != 0
12044 && (tls_mask & TLS_TPREL) == 0)
12045 {
12046 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12047 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12048 if (insn == 0)
12049 abort ();
12050 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12051 /* Was PPC64_TLS which sits on insn boundary, now
12052 PPC64_TPREL16_LO which is at low-order half-word. */
12053 rel->r_offset += d_offset;
12054 r_type = R_PPC64_TPREL16_LO;
12055 if (toc_symndx != 0)
12056 {
12057 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12058 rel->r_addend = toc_addend;
12059 /* We changed the symbol. Start over in order to
12060 get h, sym, sec etc. right. */
12061 rel--;
12062 continue;
12063 }
12064 else
12065 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12066 }
12067 break;
12068
12069 case R_PPC64_GOT_TLSGD16_HI:
12070 case R_PPC64_GOT_TLSGD16_HA:
12071 tls_gd = TLS_TPRELGD;
12072 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12073 goto tls_gdld_hi;
12074 break;
12075
12076 case R_PPC64_GOT_TLSLD16_HI:
12077 case R_PPC64_GOT_TLSLD16_HA:
12078 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12079 {
12080 tls_gdld_hi:
12081 if ((tls_mask & tls_gd) != 0)
12082 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12083 + R_PPC64_GOT_TPREL16_DS);
12084 else
12085 {
12086 rel->r_offset -= d_offset;
12087 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12088 r_type = R_PPC64_NONE;
12089 }
12090 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12091 }
12092 break;
12093
12094 case R_PPC64_GOT_TLSGD16:
12095 case R_PPC64_GOT_TLSGD16_LO:
12096 tls_gd = TLS_TPRELGD;
12097 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12098 goto tls_ldgd_opt;
12099 break;
12100
12101 case R_PPC64_GOT_TLSLD16:
12102 case R_PPC64_GOT_TLSLD16_LO:
12103 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12104 {
12105 unsigned int insn1, insn2, insn3;
12106 bfd_vma offset;
12107
12108 tls_ldgd_opt:
12109 offset = (bfd_vma) -1;
12110 /* If not using the newer R_PPC64_TLSGD/LD to mark
12111 __tls_get_addr calls, we must trust that the call
12112 stays with its arg setup insns, ie. that the next
12113 reloc is the __tls_get_addr call associated with
12114 the current reloc. Edit both insns. */
12115 if (input_section->has_tls_get_addr_call
12116 && rel + 1 < relend
12117 && branch_reloc_hash_match (input_bfd, rel + 1,
12118 htab->tls_get_addr,
12119 htab->tls_get_addr_fd))
12120 offset = rel[1].r_offset;
12121 if ((tls_mask & tls_gd) != 0)
12122 {
12123 /* IE */
12124 insn1 = bfd_get_32 (output_bfd,
12125 contents + rel->r_offset - d_offset);
12126 insn1 &= (1 << 26) - (1 << 2);
12127 insn1 |= 58 << 26; /* ld */
12128 insn2 = 0x7c636a14; /* add 3,3,13 */
12129 if (offset != (bfd_vma) -1)
12130 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12131 if ((tls_mask & TLS_EXPLICIT) == 0)
12132 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12133 + R_PPC64_GOT_TPREL16_DS);
12134 else
12135 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12136 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12137 }
12138 else
12139 {
12140 /* LE */
12141 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12142 insn2 = 0x38630000; /* addi 3,3,0 */
12143 if (tls_gd == 0)
12144 {
12145 /* Was an LD reloc. */
12146 if (toc_symndx)
12147 sec = local_sections[toc_symndx];
12148 for (r_symndx = 0;
12149 r_symndx < symtab_hdr->sh_info;
12150 r_symndx++)
12151 if (local_sections[r_symndx] == sec)
12152 break;
12153 if (r_symndx >= symtab_hdr->sh_info)
12154 r_symndx = STN_UNDEF;
12155 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12156 if (r_symndx != STN_UNDEF)
12157 rel->r_addend -= (local_syms[r_symndx].st_value
12158 + sec->output_offset
12159 + sec->output_section->vma);
12160 }
12161 else if (toc_symndx != 0)
12162 {
12163 r_symndx = toc_symndx;
12164 rel->r_addend = toc_addend;
12165 }
12166 r_type = R_PPC64_TPREL16_HA;
12167 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12168 if (offset != (bfd_vma) -1)
12169 {
12170 rel[1].r_info = ELF64_R_INFO (r_symndx,
12171 R_PPC64_TPREL16_LO);
12172 rel[1].r_offset = offset + d_offset;
12173 rel[1].r_addend = rel->r_addend;
12174 }
12175 }
12176 bfd_put_32 (output_bfd, insn1,
12177 contents + rel->r_offset - d_offset);
12178 if (offset != (bfd_vma) -1)
12179 {
12180 insn3 = bfd_get_32 (output_bfd,
12181 contents + offset + 4);
12182 if (insn3 == NOP
12183 || insn3 == CROR_151515 || insn3 == CROR_313131)
12184 {
12185 rel[1].r_offset += 4;
12186 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12187 insn2 = NOP;
12188 }
12189 bfd_put_32 (output_bfd, insn2, contents + offset);
12190 }
12191 if ((tls_mask & tls_gd) == 0
12192 && (tls_gd == 0 || toc_symndx != 0))
12193 {
12194 /* We changed the symbol. Start over in order
12195 to get h, sym, sec etc. right. */
12196 rel--;
12197 continue;
12198 }
12199 }
12200 break;
12201
12202 case R_PPC64_TLSGD:
12203 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12204 {
12205 unsigned int insn2, insn3;
12206 bfd_vma offset = rel->r_offset;
12207
12208 if ((tls_mask & TLS_TPRELGD) != 0)
12209 {
12210 /* IE */
12211 r_type = R_PPC64_NONE;
12212 insn2 = 0x7c636a14; /* add 3,3,13 */
12213 }
12214 else
12215 {
12216 /* LE */
12217 if (toc_symndx != 0)
12218 {
12219 r_symndx = toc_symndx;
12220 rel->r_addend = toc_addend;
12221 }
12222 r_type = R_PPC64_TPREL16_LO;
12223 rel->r_offset = offset + d_offset;
12224 insn2 = 0x38630000; /* addi 3,3,0 */
12225 }
12226 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12227 /* Zap the reloc on the _tls_get_addr call too. */
12228 BFD_ASSERT (offset == rel[1].r_offset);
12229 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12230 insn3 = bfd_get_32 (output_bfd,
12231 contents + offset + 4);
12232 if (insn3 == NOP
12233 || insn3 == CROR_151515 || insn3 == CROR_313131)
12234 {
12235 rel->r_offset += 4;
12236 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12237 insn2 = NOP;
12238 }
12239 bfd_put_32 (output_bfd, insn2, contents + offset);
12240 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12241 {
12242 rel--;
12243 continue;
12244 }
12245 }
12246 break;
12247
12248 case R_PPC64_TLSLD:
12249 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12250 {
12251 unsigned int insn2, insn3;
12252 bfd_vma offset = rel->r_offset;
12253
12254 if (toc_symndx)
12255 sec = local_sections[toc_symndx];
12256 for (r_symndx = 0;
12257 r_symndx < symtab_hdr->sh_info;
12258 r_symndx++)
12259 if (local_sections[r_symndx] == sec)
12260 break;
12261 if (r_symndx >= symtab_hdr->sh_info)
12262 r_symndx = STN_UNDEF;
12263 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12264 if (r_symndx != STN_UNDEF)
12265 rel->r_addend -= (local_syms[r_symndx].st_value
12266 + sec->output_offset
12267 + sec->output_section->vma);
12268
12269 r_type = R_PPC64_TPREL16_LO;
12270 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12271 rel->r_offset = offset + d_offset;
12272 /* Zap the reloc on the _tls_get_addr call too. */
12273 BFD_ASSERT (offset == rel[1].r_offset);
12274 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12275 insn2 = 0x38630000; /* addi 3,3,0 */
12276 insn3 = bfd_get_32 (output_bfd,
12277 contents + offset + 4);
12278 if (insn3 == NOP
12279 || insn3 == CROR_151515 || insn3 == CROR_313131)
12280 {
12281 rel->r_offset += 4;
12282 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12283 insn2 = NOP;
12284 }
12285 bfd_put_32 (output_bfd, insn2, contents + offset);
12286 rel--;
12287 continue;
12288 }
12289 break;
12290
12291 case R_PPC64_DTPMOD64:
12292 if (rel + 1 < relend
12293 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12294 && rel[1].r_offset == rel->r_offset + 8)
12295 {
12296 if ((tls_mask & TLS_GD) == 0)
12297 {
12298 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12299 if ((tls_mask & TLS_TPRELGD) != 0)
12300 r_type = R_PPC64_TPREL64;
12301 else
12302 {
12303 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12304 r_type = R_PPC64_NONE;
12305 }
12306 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12307 }
12308 }
12309 else
12310 {
12311 if ((tls_mask & TLS_LD) == 0)
12312 {
12313 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12314 r_type = R_PPC64_NONE;
12315 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12316 }
12317 }
12318 break;
12319
12320 case R_PPC64_TPREL64:
12321 if ((tls_mask & TLS_TPREL) == 0)
12322 {
12323 r_type = R_PPC64_NONE;
12324 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12325 }
12326 break;
12327 }
12328
12329 /* Handle other relocations that tweak non-addend part of insn. */
12330 insn = 0;
12331 max_br_offset = 1 << 25;
12332 addend = rel->r_addend;
12333 switch (r_type)
12334 {
12335 default:
12336 break;
12337
12338 /* Branch taken prediction relocations. */
12339 case R_PPC64_ADDR14_BRTAKEN:
12340 case R_PPC64_REL14_BRTAKEN:
12341 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12342 /* Fall thru. */
12343
12344 /* Branch not taken prediction relocations. */
12345 case R_PPC64_ADDR14_BRNTAKEN:
12346 case R_PPC64_REL14_BRNTAKEN:
12347 insn |= bfd_get_32 (output_bfd,
12348 contents + rel->r_offset) & ~(0x01 << 21);
12349 /* Fall thru. */
12350
12351 case R_PPC64_REL14:
12352 max_br_offset = 1 << 15;
12353 /* Fall thru. */
12354
12355 case R_PPC64_REL24:
12356 /* Calls to functions with a different TOC, such as calls to
12357 shared objects, need to alter the TOC pointer. This is
12358 done using a linkage stub. A REL24 branching to these
12359 linkage stubs needs to be followed by a nop, as the nop
12360 will be replaced with an instruction to restore the TOC
12361 base pointer. */
12362 fdh = h;
12363 if (h != NULL
12364 && h->oh != NULL
12365 && h->oh->is_func_descriptor)
12366 fdh = ppc_follow_link (h->oh);
12367 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12368 if (stub_entry != NULL
12369 && (stub_entry->stub_type == ppc_stub_plt_call
12370 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12371 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12372 {
12373 bfd_boolean can_plt_call = FALSE;
12374
12375 if (rel->r_offset + 8 <= input_section->size)
12376 {
12377 unsigned long nop;
12378 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12379 if (nop == NOP
12380 || nop == CROR_151515 || nop == CROR_313131)
12381 {
12382 if (h != NULL
12383 && (h == htab->tls_get_addr_fd
12384 || h == htab->tls_get_addr)
12385 && !htab->no_tls_get_addr_opt)
12386 {
12387 /* Special stub used, leave nop alone. */
12388 }
12389 else
12390 bfd_put_32 (input_bfd, LD_R2_40R1,
12391 contents + rel->r_offset + 4);
12392 can_plt_call = TRUE;
12393 }
12394 }
12395
12396 if (!can_plt_call)
12397 {
12398 if (stub_entry->stub_type == ppc_stub_plt_call)
12399 {
12400 /* If this is a plain branch rather than a branch
12401 and link, don't require a nop. However, don't
12402 allow tail calls in a shared library as they
12403 will result in r2 being corrupted. */
12404 unsigned long br;
12405 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12406 if (info->executable && (br & 1) == 0)
12407 can_plt_call = TRUE;
12408 else
12409 stub_entry = NULL;
12410 }
12411 else if (h != NULL
12412 && strcmp (h->elf.root.root.string,
12413 ".__libc_start_main") == 0)
12414 {
12415 /* Allow crt1 branch to go via a toc adjusting stub. */
12416 can_plt_call = TRUE;
12417 }
12418 else
12419 {
12420 if (strcmp (input_section->output_section->name,
12421 ".init") == 0
12422 || strcmp (input_section->output_section->name,
12423 ".fini") == 0)
12424 info->callbacks->einfo
12425 (_("%H: automatic multiple TOCs "
12426 "not supported using your crt files; "
12427 "recompile with -mminimal-toc or upgrade gcc\n"),
12428 input_bfd, input_section, rel->r_offset);
12429 else
12430 info->callbacks->einfo
12431 (_("%H: sibling call optimization to `%s' "
12432 "does not allow automatic multiple TOCs; "
12433 "recompile with -mminimal-toc or "
12434 "-fno-optimize-sibling-calls, "
12435 "or make `%s' extern\n"),
12436 input_bfd, input_section, rel->r_offset,
12437 sym_name,
12438 sym_name);
12439 bfd_set_error (bfd_error_bad_value);
12440 ret = FALSE;
12441 }
12442 }
12443
12444 if (can_plt_call
12445 && stub_entry->stub_type == ppc_stub_plt_call)
12446 unresolved_reloc = FALSE;
12447 }
12448
12449 if ((stub_entry == NULL
12450 || stub_entry->stub_type == ppc_stub_long_branch
12451 || stub_entry->stub_type == ppc_stub_plt_branch)
12452 && get_opd_info (sec) != NULL)
12453 {
12454 /* The branch destination is the value of the opd entry. */
12455 bfd_vma off = (relocation + addend
12456 - sec->output_section->vma
12457 - sec->output_offset);
12458 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12459 if (dest != (bfd_vma) -1)
12460 {
12461 relocation = dest;
12462 addend = 0;
12463 }
12464 }
12465
12466 /* If the branch is out of reach we ought to have a long
12467 branch stub. */
12468 from = (rel->r_offset
12469 + input_section->output_offset
12470 + input_section->output_section->vma);
12471
12472 if (stub_entry != NULL
12473 && (stub_entry->stub_type == ppc_stub_long_branch
12474 || stub_entry->stub_type == ppc_stub_plt_branch)
12475 && (r_type == R_PPC64_ADDR14_BRTAKEN
12476 || r_type == R_PPC64_ADDR14_BRNTAKEN
12477 || (relocation + addend - from + max_br_offset
12478 < 2 * max_br_offset)))
12479 /* Don't use the stub if this branch is in range. */
12480 stub_entry = NULL;
12481
12482 if (stub_entry != NULL)
12483 {
12484 /* Munge up the value and addend so that we call the stub
12485 rather than the procedure directly. */
12486 relocation = (stub_entry->stub_offset
12487 + stub_entry->stub_sec->output_offset
12488 + stub_entry->stub_sec->output_section->vma);
12489 addend = 0;
12490 }
12491
12492 if (insn != 0)
12493 {
12494 if (is_power4)
12495 {
12496 /* Set 'a' bit. This is 0b00010 in BO field for branch
12497 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12498 for branch on CTR insns (BO == 1a00t or 1a01t). */
12499 if ((insn & (0x14 << 21)) == (0x04 << 21))
12500 insn |= 0x02 << 21;
12501 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12502 insn |= 0x08 << 21;
12503 else
12504 break;
12505 }
12506 else
12507 {
12508 /* Invert 'y' bit if not the default. */
12509 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12510 insn ^= 0x01 << 21;
12511 }
12512
12513 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12514 }
12515
12516 /* NOP out calls to undefined weak functions.
12517 We can thus call a weak function without first
12518 checking whether the function is defined. */
12519 else if (h != NULL
12520 && h->elf.root.type == bfd_link_hash_undefweak
12521 && h->elf.dynindx == -1
12522 && r_type == R_PPC64_REL24
12523 && relocation == 0
12524 && addend == 0)
12525 {
12526 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12527 continue;
12528 }
12529 break;
12530 }
12531
12532 /* Set `addend'. */
12533 tls_type = 0;
12534 switch (r_type)
12535 {
12536 default:
12537 info->callbacks->einfo
12538 (_("%B: unknown relocation type %d for symbol %s\n"),
12539 input_bfd, (int) r_type, sym_name);
12540
12541 bfd_set_error (bfd_error_bad_value);
12542 ret = FALSE;
12543 continue;
12544
12545 case R_PPC64_NONE:
12546 case R_PPC64_TLS:
12547 case R_PPC64_TLSGD:
12548 case R_PPC64_TLSLD:
12549 case R_PPC64_GNU_VTINHERIT:
12550 case R_PPC64_GNU_VTENTRY:
12551 continue;
12552
12553 /* GOT16 relocations. Like an ADDR16 using the symbol's
12554 address in the GOT as relocation value instead of the
12555 symbol's value itself. Also, create a GOT entry for the
12556 symbol and put the symbol value there. */
12557 case R_PPC64_GOT_TLSGD16:
12558 case R_PPC64_GOT_TLSGD16_LO:
12559 case R_PPC64_GOT_TLSGD16_HI:
12560 case R_PPC64_GOT_TLSGD16_HA:
12561 tls_type = TLS_TLS | TLS_GD;
12562 goto dogot;
12563
12564 case R_PPC64_GOT_TLSLD16:
12565 case R_PPC64_GOT_TLSLD16_LO:
12566 case R_PPC64_GOT_TLSLD16_HI:
12567 case R_PPC64_GOT_TLSLD16_HA:
12568 tls_type = TLS_TLS | TLS_LD;
12569 goto dogot;
12570
12571 case R_PPC64_GOT_TPREL16_DS:
12572 case R_PPC64_GOT_TPREL16_LO_DS:
12573 case R_PPC64_GOT_TPREL16_HI:
12574 case R_PPC64_GOT_TPREL16_HA:
12575 tls_type = TLS_TLS | TLS_TPREL;
12576 goto dogot;
12577
12578 case R_PPC64_GOT_DTPREL16_DS:
12579 case R_PPC64_GOT_DTPREL16_LO_DS:
12580 case R_PPC64_GOT_DTPREL16_HI:
12581 case R_PPC64_GOT_DTPREL16_HA:
12582 tls_type = TLS_TLS | TLS_DTPREL;
12583 goto dogot;
12584
12585 case R_PPC64_GOT16:
12586 case R_PPC64_GOT16_LO:
12587 case R_PPC64_GOT16_HI:
12588 case R_PPC64_GOT16_HA:
12589 case R_PPC64_GOT16_DS:
12590 case R_PPC64_GOT16_LO_DS:
12591 dogot:
12592 {
12593 /* Relocation is to the entry for this symbol in the global
12594 offset table. */
12595 asection *got;
12596 bfd_vma *offp;
12597 bfd_vma off;
12598 unsigned long indx = 0;
12599 struct got_entry *ent;
12600
12601 if (tls_type == (TLS_TLS | TLS_LD)
12602 && (h == NULL
12603 || !h->elf.def_dynamic))
12604 ent = ppc64_tlsld_got (input_bfd);
12605 else
12606 {
12607
12608 if (h != NULL)
12609 {
12610 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12611 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12612 &h->elf)
12613 || (info->shared
12614 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12615 /* This is actually a static link, or it is a
12616 -Bsymbolic link and the symbol is defined
12617 locally, or the symbol was forced to be local
12618 because of a version file. */
12619 ;
12620 else
12621 {
12622 indx = h->elf.dynindx;
12623 unresolved_reloc = FALSE;
12624 }
12625 ent = h->elf.got.glist;
12626 }
12627 else
12628 {
12629 if (local_got_ents == NULL)
12630 abort ();
12631 ent = local_got_ents[r_symndx];
12632 }
12633
12634 for (; ent != NULL; ent = ent->next)
12635 if (ent->addend == orig_addend
12636 && ent->owner == input_bfd
12637 && ent->tls_type == tls_type)
12638 break;
12639 }
12640
12641 if (ent == NULL)
12642 abort ();
12643 if (ent->is_indirect)
12644 ent = ent->got.ent;
12645 offp = &ent->got.offset;
12646 got = ppc64_elf_tdata (ent->owner)->got;
12647 if (got == NULL)
12648 abort ();
12649
12650 /* The offset must always be a multiple of 8. We use the
12651 least significant bit to record whether we have already
12652 processed this entry. */
12653 off = *offp;
12654 if ((off & 1) != 0)
12655 off &= ~1;
12656 else
12657 {
12658 /* Generate relocs for the dynamic linker, except in
12659 the case of TLSLD where we'll use one entry per
12660 module. */
12661 asection *relgot;
12662 bfd_boolean ifunc;
12663
12664 *offp = off | 1;
12665 relgot = NULL;
12666 ifunc = (h != NULL
12667 ? h->elf.type == STT_GNU_IFUNC
12668 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12669 if ((info->shared || indx != 0)
12670 && (h == NULL
12671 || (tls_type == (TLS_TLS | TLS_LD)
12672 && !h->elf.def_dynamic)
12673 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12674 || h->elf.root.type != bfd_link_hash_undefweak))
12675 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12676 else if (ifunc)
12677 relgot = htab->reliplt;
12678 if (relgot != NULL)
12679 {
12680 outrel.r_offset = (got->output_section->vma
12681 + got->output_offset
12682 + off);
12683 outrel.r_addend = addend;
12684 if (tls_type & (TLS_LD | TLS_GD))
12685 {
12686 outrel.r_addend = 0;
12687 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12688 if (tls_type == (TLS_TLS | TLS_GD))
12689 {
12690 loc = relgot->contents;
12691 loc += (relgot->reloc_count++
12692 * sizeof (Elf64_External_Rela));
12693 bfd_elf64_swap_reloca_out (output_bfd,
12694 &outrel, loc);
12695 outrel.r_offset += 8;
12696 outrel.r_addend = addend;
12697 outrel.r_info
12698 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12699 }
12700 }
12701 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12702 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12703 else if (tls_type == (TLS_TLS | TLS_TPREL))
12704 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12705 else if (indx != 0)
12706 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12707 else
12708 {
12709 if (ifunc)
12710 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12711 else
12712 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12713
12714 /* Write the .got section contents for the sake
12715 of prelink. */
12716 loc = got->contents + off;
12717 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12718 loc);
12719 }
12720
12721 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12722 {
12723 outrel.r_addend += relocation;
12724 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12725 outrel.r_addend -= htab->elf.tls_sec->vma;
12726 }
12727 loc = relgot->contents;
12728 loc += (relgot->reloc_count++
12729 * sizeof (Elf64_External_Rela));
12730 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12731 }
12732
12733 /* Init the .got section contents here if we're not
12734 emitting a reloc. */
12735 else
12736 {
12737 relocation += addend;
12738 if (tls_type == (TLS_TLS | TLS_LD))
12739 relocation = 1;
12740 else if (tls_type != 0)
12741 {
12742 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12743 if (tls_type == (TLS_TLS | TLS_TPREL))
12744 relocation += DTP_OFFSET - TP_OFFSET;
12745
12746 if (tls_type == (TLS_TLS | TLS_GD))
12747 {
12748 bfd_put_64 (output_bfd, relocation,
12749 got->contents + off + 8);
12750 relocation = 1;
12751 }
12752 }
12753
12754 bfd_put_64 (output_bfd, relocation,
12755 got->contents + off);
12756 }
12757 }
12758
12759 if (off >= (bfd_vma) -2)
12760 abort ();
12761
12762 relocation = got->output_section->vma + got->output_offset + off;
12763 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12764 }
12765 break;
12766
12767 case R_PPC64_PLT16_HA:
12768 case R_PPC64_PLT16_HI:
12769 case R_PPC64_PLT16_LO:
12770 case R_PPC64_PLT32:
12771 case R_PPC64_PLT64:
12772 /* Relocation is to the entry for this symbol in the
12773 procedure linkage table. */
12774
12775 /* Resolve a PLT reloc against a local symbol directly,
12776 without using the procedure linkage table. */
12777 if (h == NULL)
12778 break;
12779
12780 /* It's possible that we didn't make a PLT entry for this
12781 symbol. This happens when statically linking PIC code,
12782 or when using -Bsymbolic. Go find a match if there is a
12783 PLT entry. */
12784 if (htab->plt != NULL)
12785 {
12786 struct plt_entry *ent;
12787 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12788 if (ent->addend == orig_addend
12789 && ent->plt.offset != (bfd_vma) -1)
12790 {
12791 relocation = (htab->plt->output_section->vma
12792 + htab->plt->output_offset
12793 + ent->plt.offset);
12794 unresolved_reloc = FALSE;
12795 }
12796 }
12797 break;
12798
12799 case R_PPC64_TOC:
12800 /* Relocation value is TOC base. */
12801 relocation = TOCstart;
12802 if (r_symndx == STN_UNDEF)
12803 relocation += htab->stub_group[input_section->id].toc_off;
12804 else if (unresolved_reloc)
12805 ;
12806 else if (sec != NULL && sec->id <= htab->top_id)
12807 relocation += htab->stub_group[sec->id].toc_off;
12808 else
12809 unresolved_reloc = TRUE;
12810 goto dodyn;
12811
12812 /* TOC16 relocs. We want the offset relative to the TOC base,
12813 which is the address of the start of the TOC plus 0x8000.
12814 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12815 in this order. */
12816 case R_PPC64_TOC16:
12817 case R_PPC64_TOC16_LO:
12818 case R_PPC64_TOC16_HI:
12819 case R_PPC64_TOC16_DS:
12820 case R_PPC64_TOC16_LO_DS:
12821 case R_PPC64_TOC16_HA:
12822 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12823 break;
12824
12825 /* Relocate against the beginning of the section. */
12826 case R_PPC64_SECTOFF:
12827 case R_PPC64_SECTOFF_LO:
12828 case R_PPC64_SECTOFF_HI:
12829 case R_PPC64_SECTOFF_DS:
12830 case R_PPC64_SECTOFF_LO_DS:
12831 case R_PPC64_SECTOFF_HA:
12832 if (sec != NULL)
12833 addend -= sec->output_section->vma;
12834 break;
12835
12836 case R_PPC64_REL16:
12837 case R_PPC64_REL16_LO:
12838 case R_PPC64_REL16_HI:
12839 case R_PPC64_REL16_HA:
12840 break;
12841
12842 case R_PPC64_REL14:
12843 case R_PPC64_REL14_BRNTAKEN:
12844 case R_PPC64_REL14_BRTAKEN:
12845 case R_PPC64_REL24:
12846 break;
12847
12848 case R_PPC64_TPREL16:
12849 case R_PPC64_TPREL16_LO:
12850 case R_PPC64_TPREL16_HI:
12851 case R_PPC64_TPREL16_HA:
12852 case R_PPC64_TPREL16_DS:
12853 case R_PPC64_TPREL16_LO_DS:
12854 case R_PPC64_TPREL16_HIGHER:
12855 case R_PPC64_TPREL16_HIGHERA:
12856 case R_PPC64_TPREL16_HIGHEST:
12857 case R_PPC64_TPREL16_HIGHESTA:
12858 if (h != NULL
12859 && h->elf.root.type == bfd_link_hash_undefweak
12860 && h->elf.dynindx == -1)
12861 {
12862 /* Make this relocation against an undefined weak symbol
12863 resolve to zero. This is really just a tweak, since
12864 code using weak externs ought to check that they are
12865 defined before using them. */
12866 bfd_byte *p = contents + rel->r_offset - d_offset;
12867
12868 insn = bfd_get_32 (output_bfd, p);
12869 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12870 if (insn != 0)
12871 bfd_put_32 (output_bfd, insn, p);
12872 break;
12873 }
12874 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12875 if (info->shared)
12876 /* The TPREL16 relocs shouldn't really be used in shared
12877 libs as they will result in DT_TEXTREL being set, but
12878 support them anyway. */
12879 goto dodyn;
12880 break;
12881
12882 case R_PPC64_DTPREL16:
12883 case R_PPC64_DTPREL16_LO:
12884 case R_PPC64_DTPREL16_HI:
12885 case R_PPC64_DTPREL16_HA:
12886 case R_PPC64_DTPREL16_DS:
12887 case R_PPC64_DTPREL16_LO_DS:
12888 case R_PPC64_DTPREL16_HIGHER:
12889 case R_PPC64_DTPREL16_HIGHERA:
12890 case R_PPC64_DTPREL16_HIGHEST:
12891 case R_PPC64_DTPREL16_HIGHESTA:
12892 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12893 break;
12894
12895 case R_PPC64_DTPMOD64:
12896 relocation = 1;
12897 addend = 0;
12898 goto dodyn;
12899
12900 case R_PPC64_TPREL64:
12901 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12902 goto dodyn;
12903
12904 case R_PPC64_DTPREL64:
12905 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12906 /* Fall thru */
12907
12908 /* Relocations that may need to be propagated if this is a
12909 dynamic object. */
12910 case R_PPC64_REL30:
12911 case R_PPC64_REL32:
12912 case R_PPC64_REL64:
12913 case R_PPC64_ADDR14:
12914 case R_PPC64_ADDR14_BRNTAKEN:
12915 case R_PPC64_ADDR14_BRTAKEN:
12916 case R_PPC64_ADDR16:
12917 case R_PPC64_ADDR16_DS:
12918 case R_PPC64_ADDR16_HA:
12919 case R_PPC64_ADDR16_HI:
12920 case R_PPC64_ADDR16_HIGHER:
12921 case R_PPC64_ADDR16_HIGHERA:
12922 case R_PPC64_ADDR16_HIGHEST:
12923 case R_PPC64_ADDR16_HIGHESTA:
12924 case R_PPC64_ADDR16_LO:
12925 case R_PPC64_ADDR16_LO_DS:
12926 case R_PPC64_ADDR24:
12927 case R_PPC64_ADDR32:
12928 case R_PPC64_ADDR64:
12929 case R_PPC64_UADDR16:
12930 case R_PPC64_UADDR32:
12931 case R_PPC64_UADDR64:
12932 dodyn:
12933 if ((input_section->flags & SEC_ALLOC) == 0)
12934 break;
12935
12936 if (NO_OPD_RELOCS && is_opd)
12937 break;
12938
12939 if ((info->shared
12940 && (h == NULL
12941 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12942 || h->elf.root.type != bfd_link_hash_undefweak)
12943 && (must_be_dyn_reloc (info, r_type)
12944 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12945 || (ELIMINATE_COPY_RELOCS
12946 && !info->shared
12947 && h != NULL
12948 && h->elf.dynindx != -1
12949 && !h->elf.non_got_ref
12950 && !h->elf.def_regular)
12951 || (!info->shared
12952 && (h != NULL
12953 ? h->elf.type == STT_GNU_IFUNC
12954 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12955 {
12956 bfd_boolean skip, relocate;
12957 asection *sreloc;
12958 bfd_vma out_off;
12959
12960 /* When generating a dynamic object, these relocations
12961 are copied into the output file to be resolved at run
12962 time. */
12963
12964 skip = FALSE;
12965 relocate = FALSE;
12966
12967 out_off = _bfd_elf_section_offset (output_bfd, info,
12968 input_section, rel->r_offset);
12969 if (out_off == (bfd_vma) -1)
12970 skip = TRUE;
12971 else if (out_off == (bfd_vma) -2)
12972 skip = TRUE, relocate = TRUE;
12973 out_off += (input_section->output_section->vma
12974 + input_section->output_offset);
12975 outrel.r_offset = out_off;
12976 outrel.r_addend = rel->r_addend;
12977
12978 /* Optimize unaligned reloc use. */
12979 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12980 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12981 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12982 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12983 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12984 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12985 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12986 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12987 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12988
12989 if (skip)
12990 memset (&outrel, 0, sizeof outrel);
12991 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
12992 && !is_opd
12993 && r_type != R_PPC64_TOC)
12994 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12995 else
12996 {
12997 /* This symbol is local, or marked to become local,
12998 or this is an opd section reloc which must point
12999 at a local function. */
13000 outrel.r_addend += relocation;
13001 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13002 {
13003 if (is_opd && h != NULL)
13004 {
13005 /* Lie about opd entries. This case occurs
13006 when building shared libraries and we
13007 reference a function in another shared
13008 lib. The same thing happens for a weak
13009 definition in an application that's
13010 overridden by a strong definition in a
13011 shared lib. (I believe this is a generic
13012 bug in binutils handling of weak syms.)
13013 In these cases we won't use the opd
13014 entry in this lib. */
13015 unresolved_reloc = FALSE;
13016 }
13017 if (!is_opd
13018 && r_type == R_PPC64_ADDR64
13019 && (h != NULL
13020 ? h->elf.type == STT_GNU_IFUNC
13021 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13022 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13023 else
13024 {
13025 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13026
13027 /* We need to relocate .opd contents for ld.so.
13028 Prelink also wants simple and consistent rules
13029 for relocs. This make all RELATIVE relocs have
13030 *r_offset equal to r_addend. */
13031 relocate = TRUE;
13032 }
13033 }
13034 else
13035 {
13036 long indx = 0;
13037
13038 if (h != NULL
13039 ? h->elf.type == STT_GNU_IFUNC
13040 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13041 {
13042 info->callbacks->einfo
13043 (_("%H: relocation %s for indirect "
13044 "function %s unsupported\n"),
13045 input_bfd, input_section, rel->r_offset,
13046 ppc64_elf_howto_table[r_type]->name,
13047 sym_name);
13048 ret = FALSE;
13049 }
13050 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13051 ;
13052 else if (sec == NULL || sec->owner == NULL)
13053 {
13054 bfd_set_error (bfd_error_bad_value);
13055 return FALSE;
13056 }
13057 else
13058 {
13059 asection *osec;
13060
13061 osec = sec->output_section;
13062 indx = elf_section_data (osec)->dynindx;
13063
13064 if (indx == 0)
13065 {
13066 if ((osec->flags & SEC_READONLY) == 0
13067 && htab->elf.data_index_section != NULL)
13068 osec = htab->elf.data_index_section;
13069 else
13070 osec = htab->elf.text_index_section;
13071 indx = elf_section_data (osec)->dynindx;
13072 }
13073 BFD_ASSERT (indx != 0);
13074
13075 /* We are turning this relocation into one
13076 against a section symbol, so subtract out
13077 the output section's address but not the
13078 offset of the input section in the output
13079 section. */
13080 outrel.r_addend -= osec->vma;
13081 }
13082
13083 outrel.r_info = ELF64_R_INFO (indx, r_type);
13084 }
13085 }
13086
13087 sreloc = elf_section_data (input_section)->sreloc;
13088 if (!htab->elf.dynamic_sections_created)
13089 sreloc = htab->reliplt;
13090 if (sreloc == NULL)
13091 abort ();
13092
13093 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13094 >= sreloc->size)
13095 abort ();
13096 loc = sreloc->contents;
13097 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13098 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13099
13100 /* If this reloc is against an external symbol, it will
13101 be computed at runtime, so there's no need to do
13102 anything now. However, for the sake of prelink ensure
13103 that the section contents are a known value. */
13104 if (! relocate)
13105 {
13106 unresolved_reloc = FALSE;
13107 /* The value chosen here is quite arbitrary as ld.so
13108 ignores section contents except for the special
13109 case of .opd where the contents might be accessed
13110 before relocation. Choose zero, as that won't
13111 cause reloc overflow. */
13112 relocation = 0;
13113 addend = 0;
13114 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13115 to improve backward compatibility with older
13116 versions of ld. */
13117 if (r_type == R_PPC64_ADDR64)
13118 addend = outrel.r_addend;
13119 /* Adjust pc_relative relocs to have zero in *r_offset. */
13120 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13121 addend = (input_section->output_section->vma
13122 + input_section->output_offset
13123 + rel->r_offset);
13124 }
13125 }
13126 break;
13127
13128 case R_PPC64_COPY:
13129 case R_PPC64_GLOB_DAT:
13130 case R_PPC64_JMP_SLOT:
13131 case R_PPC64_JMP_IREL:
13132 case R_PPC64_RELATIVE:
13133 /* We shouldn't ever see these dynamic relocs in relocatable
13134 files. */
13135 /* Fall through. */
13136
13137 case R_PPC64_PLTGOT16:
13138 case R_PPC64_PLTGOT16_DS:
13139 case R_PPC64_PLTGOT16_HA:
13140 case R_PPC64_PLTGOT16_HI:
13141 case R_PPC64_PLTGOT16_LO:
13142 case R_PPC64_PLTGOT16_LO_DS:
13143 case R_PPC64_PLTREL32:
13144 case R_PPC64_PLTREL64:
13145 /* These ones haven't been implemented yet. */
13146
13147 info->callbacks->einfo
13148 (_("%B: relocation %s is not supported for symbol %s\n"),
13149 input_bfd,
13150 ppc64_elf_howto_table[r_type]->name, sym_name);
13151
13152 bfd_set_error (bfd_error_invalid_operation);
13153 ret = FALSE;
13154 continue;
13155 }
13156
13157 /* Multi-instruction sequences that access the TOC can be
13158 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13159 to nop; addi rb,r2,x; */
13160 switch (r_type)
13161 {
13162 default:
13163 break;
13164
13165 case R_PPC64_GOT_TLSLD16_HI:
13166 case R_PPC64_GOT_TLSGD16_HI:
13167 case R_PPC64_GOT_TPREL16_HI:
13168 case R_PPC64_GOT_DTPREL16_HI:
13169 case R_PPC64_GOT16_HI:
13170 case R_PPC64_TOC16_HI:
13171 /* These relocs would only be useful if building up an
13172 offset to later add to r2, perhaps in an indexed
13173 addressing mode instruction. Don't try to optimize.
13174 Unfortunately, the possibility of someone building up an
13175 offset like this or even with the HA relocs, means that
13176 we need to check the high insn when optimizing the low
13177 insn. */
13178 break;
13179
13180 case R_PPC64_GOT_TLSLD16_HA:
13181 case R_PPC64_GOT_TLSGD16_HA:
13182 case R_PPC64_GOT_TPREL16_HA:
13183 case R_PPC64_GOT_DTPREL16_HA:
13184 case R_PPC64_GOT16_HA:
13185 case R_PPC64_TOC16_HA:
13186 /* nop is done later. */
13187 break;
13188
13189 case R_PPC64_GOT_TLSLD16_LO:
13190 case R_PPC64_GOT_TLSGD16_LO:
13191 case R_PPC64_GOT_TPREL16_LO_DS:
13192 case R_PPC64_GOT_DTPREL16_LO_DS:
13193 case R_PPC64_GOT16_LO:
13194 case R_PPC64_GOT16_LO_DS:
13195 case R_PPC64_TOC16_LO:
13196 case R_PPC64_TOC16_LO_DS:
13197 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
13198 {
13199 bfd_byte *p = contents + (rel->r_offset & ~3);
13200 insn = bfd_get_32 (input_bfd, p);
13201 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
13202 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
13203 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
13204 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
13205 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
13206 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
13207 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
13208 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
13209 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
13210 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
13211 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
13212 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
13213 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
13214 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
13215 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
13216 && (insn & 3) != 1)
13217 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
13218 && ((insn & 3) == 0 || (insn & 3) == 3)))
13219 {
13220 unsigned int reg = (insn >> 16) & 0x1f;
13221 const Elf_Internal_Rela *ha;
13222 bfd_boolean match_addend;
13223
13224 match_addend = (sym != NULL
13225 && ELF_ST_TYPE (sym->st_info) == STT_SECTION);
13226 ha = ha_reloc_match (relocs, rel, &reg, match_addend,
13227 input_bfd, contents);
13228 if (ha != NULL)
13229 {
13230 insn &= ~(0x1f << 16);
13231 insn |= reg << 16;
13232 bfd_put_32 (input_bfd, insn, p);
13233 if (ha_opt == NULL)
13234 {
13235 ha_opt = bfd_zmalloc (input_section->reloc_count);
13236 if (ha_opt == NULL)
13237 return FALSE;
13238 }
13239 ha_opt[ha - relocs] = 1;
13240 }
13241 else
13242 /* If we don't find a matching high part insn,
13243 something is fishy. Refuse to nop any high
13244 part insn in this section. */
13245 no_ha_opt = TRUE;
13246 }
13247 }
13248 break;
13249 }
13250
13251 /* Do any further special processing. */
13252 switch (r_type)
13253 {
13254 default:
13255 break;
13256
13257 case R_PPC64_ADDR16_HA:
13258 case R_PPC64_REL16_HA:
13259 case R_PPC64_ADDR16_HIGHERA:
13260 case R_PPC64_ADDR16_HIGHESTA:
13261 case R_PPC64_TOC16_HA:
13262 case R_PPC64_SECTOFF_HA:
13263 case R_PPC64_TPREL16_HA:
13264 case R_PPC64_DTPREL16_HA:
13265 case R_PPC64_TPREL16_HIGHER:
13266 case R_PPC64_TPREL16_HIGHERA:
13267 case R_PPC64_TPREL16_HIGHEST:
13268 case R_PPC64_TPREL16_HIGHESTA:
13269 case R_PPC64_DTPREL16_HIGHER:
13270 case R_PPC64_DTPREL16_HIGHERA:
13271 case R_PPC64_DTPREL16_HIGHEST:
13272 case R_PPC64_DTPREL16_HIGHESTA:
13273 /* It's just possible that this symbol is a weak symbol
13274 that's not actually defined anywhere. In that case,
13275 'sec' would be NULL, and we should leave the symbol
13276 alone (it will be set to zero elsewhere in the link). */
13277 if (sec == NULL)
13278 break;
13279 /* Fall thru */
13280
13281 case R_PPC64_GOT16_HA:
13282 case R_PPC64_PLTGOT16_HA:
13283 case R_PPC64_PLT16_HA:
13284 case R_PPC64_GOT_TLSGD16_HA:
13285 case R_PPC64_GOT_TLSLD16_HA:
13286 case R_PPC64_GOT_TPREL16_HA:
13287 case R_PPC64_GOT_DTPREL16_HA:
13288 /* Add 0x10000 if sign bit in 0:15 is set.
13289 Bits 0:15 are not used. */
13290 addend += 0x8000;
13291 break;
13292
13293 case R_PPC64_ADDR16_DS:
13294 case R_PPC64_ADDR16_LO_DS:
13295 case R_PPC64_GOT16_DS:
13296 case R_PPC64_GOT16_LO_DS:
13297 case R_PPC64_PLT16_LO_DS:
13298 case R_PPC64_SECTOFF_DS:
13299 case R_PPC64_SECTOFF_LO_DS:
13300 case R_PPC64_TOC16_DS:
13301 case R_PPC64_TOC16_LO_DS:
13302 case R_PPC64_PLTGOT16_DS:
13303 case R_PPC64_PLTGOT16_LO_DS:
13304 case R_PPC64_GOT_TPREL16_DS:
13305 case R_PPC64_GOT_TPREL16_LO_DS:
13306 case R_PPC64_GOT_DTPREL16_DS:
13307 case R_PPC64_GOT_DTPREL16_LO_DS:
13308 case R_PPC64_TPREL16_DS:
13309 case R_PPC64_TPREL16_LO_DS:
13310 case R_PPC64_DTPREL16_DS:
13311 case R_PPC64_DTPREL16_LO_DS:
13312 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13313 mask = 3;
13314 /* If this reloc is against an lq insn, then the value must be
13315 a multiple of 16. This is somewhat of a hack, but the
13316 "correct" way to do this by defining _DQ forms of all the
13317 _DS relocs bloats all reloc switches in this file. It
13318 doesn't seem to make much sense to use any of these relocs
13319 in data, so testing the insn should be safe. */
13320 if ((insn & (0x3f << 26)) == (56u << 26))
13321 mask = 15;
13322 if (((relocation + addend) & mask) != 0)
13323 {
13324 info->callbacks->einfo
13325 (_("%H: error: %s not a multiple of %u\n"),
13326 input_bfd, input_section, rel->r_offset,
13327 ppc64_elf_howto_table[r_type]->name,
13328 mask + 1);
13329 bfd_set_error (bfd_error_bad_value);
13330 ret = FALSE;
13331 continue;
13332 }
13333 break;
13334 }
13335
13336 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13337 because such sections are not SEC_ALLOC and thus ld.so will
13338 not process them. */
13339 if (unresolved_reloc
13340 && !((input_section->flags & SEC_DEBUGGING) != 0
13341 && h->elf.def_dynamic))
13342 {
13343 info->callbacks->einfo
13344 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
13345 input_bfd, input_section, rel->r_offset,
13346 ppc64_elf_howto_table[(int) r_type]->name,
13347 h->elf.root.root.string);
13348 ret = FALSE;
13349 }
13350
13351 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13352 input_bfd,
13353 input_section,
13354 contents,
13355 rel->r_offset,
13356 relocation,
13357 addend);
13358
13359 if (r != bfd_reloc_ok)
13360 {
13361 if (sym_name == NULL)
13362 sym_name = "(null)";
13363 if (r == bfd_reloc_overflow)
13364 {
13365 if (warned)
13366 continue;
13367 if (h != NULL
13368 && h->elf.root.type == bfd_link_hash_undefweak
13369 && ppc64_elf_howto_table[r_type]->pc_relative)
13370 {
13371 /* Assume this is a call protected by other code that
13372 detects the symbol is undefined. If this is the case,
13373 we can safely ignore the overflow. If not, the
13374 program is hosed anyway, and a little warning isn't
13375 going to help. */
13376
13377 continue;
13378 }
13379
13380 if (!((*info->callbacks->reloc_overflow)
13381 (info, (h ? &h->elf.root : NULL), sym_name,
13382 ppc64_elf_howto_table[r_type]->name,
13383 orig_addend, input_bfd, input_section, rel->r_offset)))
13384 return FALSE;
13385 }
13386 else
13387 {
13388 info->callbacks->einfo
13389 (_("%H: %s reloc against `%s': error %d\n"),
13390 input_bfd, input_section, rel->r_offset,
13391 ppc64_elf_howto_table[r_type]->name,
13392 sym_name,
13393 (int) r);
13394 ret = FALSE;
13395 }
13396 }
13397 }
13398
13399 if (ha_opt != NULL)
13400 {
13401 if (!no_ha_opt)
13402 {
13403 unsigned char *opt = ha_opt;
13404 rel = relocs;
13405 relend = relocs + input_section->reloc_count;
13406 for (; rel < relend; opt++, rel++)
13407 if (*opt != 0)
13408 {
13409 bfd_byte *p = contents + (rel->r_offset & ~3);
13410 bfd_put_32 (input_bfd, NOP, p);
13411 }
13412 }
13413 free (ha_opt);
13414 }
13415
13416 /* If we're emitting relocations, then shortly after this function
13417 returns, reloc offsets and addends for this section will be
13418 adjusted. Worse, reloc symbol indices will be for the output
13419 file rather than the input. Save a copy of the relocs for
13420 opd_entry_value. */
13421 if (is_opd && (info->emitrelocations || info->relocatable))
13422 {
13423 bfd_size_type amt;
13424 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13425 rel = bfd_alloc (input_bfd, amt);
13426 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13427 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13428 if (rel == NULL)
13429 return FALSE;
13430 memcpy (rel, relocs, amt);
13431 }
13432 return ret;
13433 }
13434
13435 /* Adjust the value of any local symbols in opd sections. */
13436
13437 static int
13438 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13439 const char *name ATTRIBUTE_UNUSED,
13440 Elf_Internal_Sym *elfsym,
13441 asection *input_sec,
13442 struct elf_link_hash_entry *h)
13443 {
13444 struct _opd_sec_data *opd;
13445 long adjust;
13446 bfd_vma value;
13447
13448 if (h != NULL)
13449 return 1;
13450
13451 opd = get_opd_info (input_sec);
13452 if (opd == NULL || opd->adjust == NULL)
13453 return 1;
13454
13455 value = elfsym->st_value - input_sec->output_offset;
13456 if (!info->relocatable)
13457 value -= input_sec->output_section->vma;
13458
13459 adjust = opd->adjust[value / 8];
13460 if (adjust == -1)
13461 return 2;
13462
13463 elfsym->st_value += adjust;
13464 return 1;
13465 }
13466
13467 /* Finish up dynamic symbol handling. We set the contents of various
13468 dynamic sections here. */
13469
13470 static bfd_boolean
13471 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13472 struct bfd_link_info *info,
13473 struct elf_link_hash_entry *h,
13474 Elf_Internal_Sym *sym)
13475 {
13476 struct ppc_link_hash_table *htab;
13477 struct plt_entry *ent;
13478 Elf_Internal_Rela rela;
13479 bfd_byte *loc;
13480
13481 htab = ppc_hash_table (info);
13482 if (htab == NULL)
13483 return FALSE;
13484
13485 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13486 if (ent->plt.offset != (bfd_vma) -1)
13487 {
13488 /* This symbol has an entry in the procedure linkage
13489 table. Set it up. */
13490 if (!htab->elf.dynamic_sections_created
13491 || h->dynindx == -1)
13492 {
13493 BFD_ASSERT (h->type == STT_GNU_IFUNC
13494 && h->def_regular
13495 && (h->root.type == bfd_link_hash_defined
13496 || h->root.type == bfd_link_hash_defweak));
13497 rela.r_offset = (htab->iplt->output_section->vma
13498 + htab->iplt->output_offset
13499 + ent->plt.offset);
13500 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13501 rela.r_addend = (h->root.u.def.value
13502 + h->root.u.def.section->output_offset
13503 + h->root.u.def.section->output_section->vma
13504 + ent->addend);
13505 loc = (htab->reliplt->contents
13506 + (htab->reliplt->reloc_count++
13507 * sizeof (Elf64_External_Rela)));
13508 }
13509 else
13510 {
13511 rela.r_offset = (htab->plt->output_section->vma
13512 + htab->plt->output_offset
13513 + ent->plt.offset);
13514 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13515 rela.r_addend = ent->addend;
13516 loc = (htab->relplt->contents
13517 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13518 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13519 }
13520 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13521 }
13522
13523 if (h->needs_copy)
13524 {
13525 /* This symbol needs a copy reloc. Set it up. */
13526
13527 if (h->dynindx == -1
13528 || (h->root.type != bfd_link_hash_defined
13529 && h->root.type != bfd_link_hash_defweak)
13530 || htab->relbss == NULL)
13531 abort ();
13532
13533 rela.r_offset = (h->root.u.def.value
13534 + h->root.u.def.section->output_section->vma
13535 + h->root.u.def.section->output_offset);
13536 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13537 rela.r_addend = 0;
13538 loc = htab->relbss->contents;
13539 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13540 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13541 }
13542
13543 /* Mark some specially defined symbols as absolute. */
13544 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13545 sym->st_shndx = SHN_ABS;
13546
13547 return TRUE;
13548 }
13549
13550 /* Used to decide how to sort relocs in an optimal manner for the
13551 dynamic linker, before writing them out. */
13552
13553 static enum elf_reloc_type_class
13554 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13555 {
13556 enum elf_ppc64_reloc_type r_type;
13557
13558 r_type = ELF64_R_TYPE (rela->r_info);
13559 switch (r_type)
13560 {
13561 case R_PPC64_RELATIVE:
13562 return reloc_class_relative;
13563 case R_PPC64_JMP_SLOT:
13564 return reloc_class_plt;
13565 case R_PPC64_COPY:
13566 return reloc_class_copy;
13567 default:
13568 return reloc_class_normal;
13569 }
13570 }
13571
13572 /* Finish up the dynamic sections. */
13573
13574 static bfd_boolean
13575 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13576 struct bfd_link_info *info)
13577 {
13578 struct ppc_link_hash_table *htab;
13579 bfd *dynobj;
13580 asection *sdyn;
13581
13582 htab = ppc_hash_table (info);
13583 if (htab == NULL)
13584 return FALSE;
13585
13586 dynobj = htab->elf.dynobj;
13587 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13588
13589 if (htab->elf.dynamic_sections_created)
13590 {
13591 Elf64_External_Dyn *dyncon, *dynconend;
13592
13593 if (sdyn == NULL || htab->got == NULL)
13594 abort ();
13595
13596 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13597 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13598 for (; dyncon < dynconend; dyncon++)
13599 {
13600 Elf_Internal_Dyn dyn;
13601 asection *s;
13602
13603 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13604
13605 switch (dyn.d_tag)
13606 {
13607 default:
13608 continue;
13609
13610 case DT_PPC64_GLINK:
13611 s = htab->glink;
13612 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13613 /* We stupidly defined DT_PPC64_GLINK to be the start
13614 of glink rather than the first entry point, which is
13615 what ld.so needs, and now have a bigger stub to
13616 support automatic multiple TOCs. */
13617 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13618 break;
13619
13620 case DT_PPC64_OPD:
13621 s = bfd_get_section_by_name (output_bfd, ".opd");
13622 if (s == NULL)
13623 continue;
13624 dyn.d_un.d_ptr = s->vma;
13625 break;
13626
13627 case DT_PPC64_OPDSZ:
13628 s = bfd_get_section_by_name (output_bfd, ".opd");
13629 if (s == NULL)
13630 continue;
13631 dyn.d_un.d_val = s->size;
13632 break;
13633
13634 case DT_PLTGOT:
13635 s = htab->plt;
13636 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13637 break;
13638
13639 case DT_JMPREL:
13640 s = htab->relplt;
13641 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13642 break;
13643
13644 case DT_PLTRELSZ:
13645 dyn.d_un.d_val = htab->relplt->size;
13646 break;
13647
13648 case DT_RELASZ:
13649 /* Don't count procedure linkage table relocs in the
13650 overall reloc count. */
13651 s = htab->relplt;
13652 if (s == NULL)
13653 continue;
13654 dyn.d_un.d_val -= s->size;
13655 break;
13656
13657 case DT_RELA:
13658 /* We may not be using the standard ELF linker script.
13659 If .rela.plt is the first .rela section, we adjust
13660 DT_RELA to not include it. */
13661 s = htab->relplt;
13662 if (s == NULL)
13663 continue;
13664 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13665 continue;
13666 dyn.d_un.d_ptr += s->size;
13667 break;
13668 }
13669
13670 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13671 }
13672 }
13673
13674 if (htab->got != NULL && htab->got->size != 0)
13675 {
13676 /* Fill in the first entry in the global offset table.
13677 We use it to hold the link-time TOCbase. */
13678 bfd_put_64 (output_bfd,
13679 elf_gp (output_bfd) + TOC_BASE_OFF,
13680 htab->got->contents);
13681
13682 /* Set .got entry size. */
13683 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13684 }
13685
13686 if (htab->plt != NULL && htab->plt->size != 0)
13687 {
13688 /* Set .plt entry size. */
13689 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13690 = PLT_ENTRY_SIZE;
13691 }
13692
13693 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13694 brlt ourselves if emitrelocations. */
13695 if (htab->brlt != NULL
13696 && htab->brlt->reloc_count != 0
13697 && !_bfd_elf_link_output_relocs (output_bfd,
13698 htab->brlt,
13699 elf_section_data (htab->brlt)->rela.hdr,
13700 elf_section_data (htab->brlt)->relocs,
13701 NULL))
13702 return FALSE;
13703
13704 if (htab->glink != NULL
13705 && htab->glink->reloc_count != 0
13706 && !_bfd_elf_link_output_relocs (output_bfd,
13707 htab->glink,
13708 elf_section_data (htab->glink)->rela.hdr,
13709 elf_section_data (htab->glink)->relocs,
13710 NULL))
13711 return FALSE;
13712
13713
13714 if (htab->glink_eh_frame != NULL
13715 && htab->glink_eh_frame->sec_info_type == ELF_INFO_TYPE_EH_FRAME
13716 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
13717 htab->glink_eh_frame,
13718 htab->glink_eh_frame->contents))
13719 return FALSE;
13720
13721 /* We need to handle writing out multiple GOT sections ourselves,
13722 since we didn't add them to DYNOBJ. We know dynobj is the first
13723 bfd. */
13724 while ((dynobj = dynobj->link_next) != NULL)
13725 {
13726 asection *s;
13727
13728 if (!is_ppc64_elf (dynobj))
13729 continue;
13730
13731 s = ppc64_elf_tdata (dynobj)->got;
13732 if (s != NULL
13733 && s->size != 0
13734 && s->output_section != bfd_abs_section_ptr
13735 && !bfd_set_section_contents (output_bfd, s->output_section,
13736 s->contents, s->output_offset,
13737 s->size))
13738 return FALSE;
13739 s = ppc64_elf_tdata (dynobj)->relgot;
13740 if (s != NULL
13741 && s->size != 0
13742 && s->output_section != bfd_abs_section_ptr
13743 && !bfd_set_section_contents (output_bfd, s->output_section,
13744 s->contents, s->output_offset,
13745 s->size))
13746 return FALSE;
13747 }
13748
13749 return TRUE;
13750 }
13751
13752 #include "elf64-target.h"
GDB Binutils - Deliverables
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