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Add -Wshadow to the gcc command line options used when compiling the binutils.
[binutils.git] / bfd / elf64-ppc.c
bloba181c282763601286ba3cbc1fc9c44116e2644ad
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_process_dot_syms
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115 #define elf_backend_post_process_headers _bfd_elf_set_osabi
116
117 /* The name of the dynamic interpreter. This is put in the .interp
118 section. */
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
120
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 24
123
124 /* The initial size of the plt reserved for the dynamic linker. */
125 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
126
127 /* TOC base pointers offset from start of TOC. */
128 #define TOC_BASE_OFF 0x8000
129
130 /* Offset of tp and dtp pointers from start of TLS block. */
131 #define TP_OFFSET 0x7000
132 #define DTP_OFFSET 0x8000
133
134 /* .plt call stub instructions. The normal stub is like this, but
135 sometimes the .plt entry crosses a 64k boundary and we need to
136 insert an addi to adjust r12. */
137 #define PLT_CALL_STUB_SIZE (7*4)
138 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
139 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
140 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
141 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
142 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
143 /* ld %r11,xxx+16@l(%r12) */
144 #define BCTR 0x4e800420 /* bctr */
145
146
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
148 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
149 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
150 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
151
152 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
153 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
154
155 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
156
157 /* glink call stub instructions. We enter with the index in R0. */
158 #define GLINK_CALL_STUB_SIZE (16*4)
159 /* 0: */
160 /* .quad plt0-1f */
161 /* __glink: */
162 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
163 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
164 /* 1: */
165 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
166 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
167 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
168 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
169 /* ld %11,0(%12) */
170 /* ld %2,8(%12) */
171 /* mtctr %11 */
172 /* ld %11,16(%12) */
173 /* bctr */
174
175 /* Pad with this. */
176 #define NOP 0x60000000
177
178 /* Some other nops. */
179 #define CROR_151515 0x4def7b82
180 #define CROR_313131 0x4ffffb82
181
182 /* .glink entries for the first 32k functions are two instructions. */
183 #define LI_R0_0 0x38000000 /* li %r0,0 */
184 #define B_DOT 0x48000000 /* b . */
185
186 /* After that, we need two instructions to load the index, followed by
187 a branch. */
188 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
189 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
190
191 /* Instructions used by the save and restore reg functions. */
192 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
193 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
194 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
195 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
196 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
197 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
198 #define LI_R12_0 0x39800000 /* li %r12,0 */
199 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
200 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
201 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
202 #define BLR 0x4e800020 /* blr */
203
204 /* Since .opd is an array of descriptors and each entry will end up
205 with identical R_PPC64_RELATIVE relocs, there is really no need to
206 propagate .opd relocs; The dynamic linker should be taught to
207 relocate .opd without reloc entries. */
208 #ifndef NO_OPD_RELOCS
209 #define NO_OPD_RELOCS 0
210 #endif
211 \f
212 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
213
214 /* Relocation HOWTO's. */
215 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
216
217 static reloc_howto_type ppc64_elf_howto_raw[] = {
218 /* This reloc does nothing. */
219 HOWTO (R_PPC64_NONE, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_NONE", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 32 bit relocation. */
234 HOWTO (R_PPC64_ADDR32, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR32", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* An absolute 26 bit branch; the lower two bits must be zero.
249 FIXME: we don't check that, we just clear them. */
250 HOWTO (R_PPC64_ADDR24, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 26, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR24", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0x03fffffc, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A standard 16 bit relocation. */
265 HOWTO (R_PPC64_ADDR16, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_bitfield, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 16 bit relocation without overflow. */
280 HOWTO (R_PPC64_ADDR16_LO, /* type */
281 0, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_LO", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address. */
295 HOWTO (R_PPC64_ADDR16_HI, /* type */
296 16, /* rightshift */
297 1, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_dont, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR16_HI", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xffff, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
310 bits, treated as a signed number, is negative. */
311 HOWTO (R_PPC64_ADDR16_HA, /* type */
312 16, /* rightshift */
313 1, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_dont, /* complain_on_overflow */
318 ppc64_elf_ha_reloc, /* special_function */
319 "R_PPC64_ADDR16_HA", /* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0xffff, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch; the lower two bits must be zero.
326 FIXME: we don't check that, we just clear them. */
327 HOWTO (R_PPC64_ADDR14, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 16, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield, /* complain_on_overflow */
334 ppc64_elf_branch_reloc, /* special_function */
335 "R_PPC64_ADDR14", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0x0000fffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* An absolute 16 bit branch, for which bit 10 should be set to
342 indicate that the branch is expected to be taken. The lower two
343 bits must be zero. */
344 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 ppc64_elf_brtaken_reloc, /* special_function */
352 "R_PPC64_ADDR14_BRTAKEN",/* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x0000fffc, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* An absolute 16 bit branch, for which bit 10 should be set to
359 indicate that the branch is not expected to be taken. The lower
360 two bits must be zero. */
361 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 ppc64_elf_brtaken_reloc, /* special_function */
369 "R_PPC64_ADDR14_BRNTAKEN",/* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* A relative 26 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL24, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 26, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL24", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x03fffffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch; the lower two bits must be zero. */
391 HOWTO (R_PPC64_REL14, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 16, /* bitsize */
395 TRUE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_signed, /* complain_on_overflow */
398 ppc64_elf_branch_reloc, /* special_function */
399 "R_PPC64_REL14", /* name */
400 FALSE, /* partial_inplace */
401 0, /* src_mask */
402 0x0000fffc, /* dst_mask */
403 TRUE), /* pcrel_offset */
404
405 /* A relative 16 bit branch. Bit 10 should be set to indicate that
406 the branch is expected to be taken. The lower two bits must be
407 zero. */
408 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_brtaken_reloc, /* special_function */
416 "R_PPC64_REL14_BRTAKEN", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0x0000fffc, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 /* A relative 16 bit branch. Bit 10 should be set to indicate that
423 the branch is not expected to be taken. The lower two bits must
424 be zero. */
425 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
426 0, /* rightshift */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 TRUE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_signed, /* complain_on_overflow */
432 ppc64_elf_brtaken_reloc, /* special_function */
433 "R_PPC64_REL14_BRNTAKEN",/* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0x0000fffc, /* dst_mask */
437 TRUE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
440 symbol. */
441 HOWTO (R_PPC64_GOT16, /* type */
442 0, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_LO, /* type */
458 0, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_LO", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
472 the symbol. */
473 HOWTO (R_PPC64_GOT16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont,/* complain_on_overflow */
480 ppc64_elf_unhandled_reloc, /* special_function */
481 "R_PPC64_GOT16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
488 the symbol. */
489 HOWTO (R_PPC64_GOT16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont,/* complain_on_overflow */
496 ppc64_elf_unhandled_reloc, /* special_function */
497 "R_PPC64_GOT16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* This is used only by the dynamic linker. The symbol should exist
504 both in the object being run and in some shared library. The
505 dynamic linker copies the data addressed by the symbol from the
506 shared library into the object, because the object being
507 run has to have the data at some particular address. */
508 HOWTO (R_PPC64_COPY, /* type */
509 0, /* rightshift */
510 0, /* this one is variable size */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_COPY", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Like R_PPC64_ADDR64, but used when setting global offset table
523 entries. */
524 HOWTO (R_PPC64_GLOB_DAT, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc64_elf_unhandled_reloc, /* special_function */
532 "R_PPC64_GLOB_DAT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Created by the link editor. Marks a procedure linkage table
539 entry for a symbol. */
540 HOWTO (R_PPC64_JMP_SLOT, /* type */
541 0, /* rightshift */
542 0, /* size (0 = byte, 1 = short, 2 = long) */
543 0, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc64_elf_unhandled_reloc, /* special_function */
548 "R_PPC64_JMP_SLOT", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Used only by the dynamic linker. When the object is run, this
555 doubleword64 is set to the load address of the object, plus the
556 addend. */
557 HOWTO (R_PPC64_RELATIVE, /* type */
558 0, /* rightshift */
559 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
560 64, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_RELATIVE", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 ONES (64), /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC64_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC64_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC64_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative. */
602 HOWTO (R_PPC64_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 /* FIXME: Verify. Was complain_overflow_bitfield. */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table. */
618 HOWTO (R_PPC64_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: R_PPC64_PLTREL32 not supported. */
634 HOWTO (R_PPC64_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC64_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffffffff, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC64_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc64_elf_unhandled_reloc, /* special_function */
674 "R_PPC64_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC64_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_unhandled_reloc, /* special_function */
690 "R_PPC64_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* Like R_PPC64_SECTOFF, but no overflow warning. */
712 HOWTO (R_PPC64_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC64_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 ppc64_elf_sectoff_ha_reloc, /* special_function */
750 "R_PPC64_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Like R_PPC64_REL24 without touching the two least significant bits. */
757 HOWTO (R_PPC64_REL30, /* type */
758 2, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 30, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_REL30", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xfffffffc, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
772
773 /* A standard 64-bit relocation. */
774 HOWTO (R_PPC64_ADDR64, /* type */
775 0, /* rightshift */
776 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
777 64, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR64", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 ONES (64), /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
790 32, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHER", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 32-47 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
806 32, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHERA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address. */
820 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
821 48, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_ADDR16_HIGHEST", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* The bits 48-63 of an address, plus 1 if the contents of the low
835 16 bits, treated as a signed number, is negative. */
836 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
837 48, /* rightshift */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 ppc64_elf_ha_reloc, /* special_function */
844 "R_PPC64_ADDR16_HIGHESTA", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0xffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Like ADDR64, but may be unaligned. */
851 HOWTO (R_PPC64_UADDR64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_UADDR64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit relative relocation. */
866 HOWTO (R_PPC64_REL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_PPC64_REL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 64-bit relocation to the symbol's procedure linkage table. */
881 HOWTO (R_PPC64_PLT64, /* type */
882 0, /* rightshift */
883 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
884 64, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_dont, /* complain_on_overflow */
888 ppc64_elf_unhandled_reloc, /* special_function */
889 "R_PPC64_PLT64", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 ONES (64), /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* 64-bit PC relative relocation to the symbol's procedure linkage
896 table. */
897 /* FIXME: R_PPC64_PLTREL64 not supported. */
898 HOWTO (R_PPC64_PLTREL64, /* type */
899 0, /* rightshift */
900 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
901 64, /* bitsize */
902 TRUE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc64_elf_unhandled_reloc, /* special_function */
906 "R_PPC64_PLTREL64", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 ONES (64), /* dst_mask */
910 TRUE), /* pcrel_offset */
911
912 /* 16 bit TOC-relative relocation. */
913
914 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
915 HOWTO (R_PPC64_TOC16, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_signed, /* complain_on_overflow */
922 ppc64_elf_toc_reloc, /* special_function */
923 "R_PPC64_TOC16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* 16 bit TOC-relative relocation without overflow. */
930
931 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
932 HOWTO (R_PPC64_TOC16_LO, /* type */
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc64_elf_toc_reloc, /* special_function */
940 "R_PPC64_TOC16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* 16 bit TOC-relative relocation, high 16 bits. */
947
948 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
949 HOWTO (R_PPC64_TOC16_HI, /* type */
950 16, /* rightshift */
951 1, /* size (0 = byte, 1 = short, 2 = long) */
952 16, /* bitsize */
953 FALSE, /* pc_relative */
954 0, /* bitpos */
955 complain_overflow_dont, /* complain_on_overflow */
956 ppc64_elf_toc_reloc, /* special_function */
957 "R_PPC64_TOC16_HI", /* name */
958 FALSE, /* partial_inplace */
959 0, /* src_mask */
960 0xffff, /* dst_mask */
961 FALSE), /* pcrel_offset */
962
963 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
964 contents of the low 16 bits, treated as a signed number, is
965 negative. */
966
967 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
968 HOWTO (R_PPC64_TOC16_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc64_elf_toc_ha_reloc, /* special_function */
976 "R_PPC64_TOC16_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 64-bit relocation; insert value of TOC base (.TOC.). */
983
984 /* R_PPC64_TOC 51 doubleword64 .TOC. */
985 HOWTO (R_PPC64_TOC, /* type */
986 0, /* rightshift */
987 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
988 64, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_bitfield, /* complain_on_overflow */
992 ppc64_elf_toc64_reloc, /* special_function */
993 "R_PPC64_TOC", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 ONES (64), /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like R_PPC64_GOT16, but also informs the link editor that the
1000 value to relocate may (!) refer to a PLT entry which the link
1001 editor (a) may replace with the symbol value. If the link editor
1002 is unable to fully resolve the symbol, it may (b) create a PLT
1003 entry and store the address to the new PLT entry in the GOT.
1004 This permits lazy resolution of function symbols at run time.
1005 The link editor may also skip all of this and just (c) emit a
1006 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1007 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16, /* type */
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_signed, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLTGOT16, but without overflow. */
1023 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1024 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1025 0, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc, /* special_function */
1032 "R_PPC64_PLTGOT16_LO", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1039 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1040 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1041 16, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont, /* complain_on_overflow */
1047 ppc64_elf_unhandled_reloc, /* special_function */
1048 "R_PPC64_PLTGOT16_HI", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xffff, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1055 1 if the contents of the low 16 bits, treated as a signed number,
1056 is negative. */
1057 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1058 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1059 16, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 ppc64_elf_unhandled_reloc, /* special_function */
1066 "R_PPC64_PLTGOT16_HA", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_bitfield, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont,/* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 "R_PPC64_ADDR16_LO_DS",/* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_GOT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_unhandled_reloc, /* special_function */
1141 "R_PPC64_PLT16_LO_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_bitfield, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_sectoff_reloc, /* special_function */
1171 "R_PPC64_SECTOFF_LO_DS",/* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1193 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_toc_reloc, /* special_function */
1201 "R_PPC64_TOC16_LO_DS", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1208 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1209 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1210 0, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_signed, /* complain_on_overflow */
1216 ppc64_elf_unhandled_reloc, /* special_function */
1217 "R_PPC64_PLTGOT16_DS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xfffc, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1224 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1225 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1226 0, /* rightshift */
1227 1, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_PLTGOT16_LO_DS",/* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0xfffc, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Marker relocs for TLS. */
1240 HOWTO (R_PPC64_TLS,
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_PPC64_TLS", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 HOWTO (R_PPC64_TLSGD,
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_PPC64_TLSGD", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 0, /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 HOWTO (R_PPC64_TLSLD,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLSLD", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* Computes the load module index of the load module that contains the
1283 definition of its TLS sym. */
1284 HOWTO (R_PPC64_DTPMOD64,
1285 0, /* rightshift */
1286 4, /* size (0 = byte, 1 = short, 2 = long) */
1287 64, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 ppc64_elf_unhandled_reloc, /* special_function */
1292 "R_PPC64_DTPMOD64", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 ONES (64), /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* Computes a dtv-relative displacement, the difference between the value
1299 of sym+add and the base address of the thread-local storage block that
1300 contains the definition of sym, minus 0x8000. */
1301 HOWTO (R_PPC64_DTPREL64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* A 16 bit dtprel reloc. */
1316 HOWTO (R_PPC64_DTPREL16,
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16, but no overflow. */
1331 HOWTO (R_PPC64_DTPREL16_LO,
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_LO", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HI,
1347 16, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HI", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HA,
1362 16, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHER,
1377 32, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHER", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1392 32, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHERA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1406 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1407 48, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_HIGHEST", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1421 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1422 48, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like DTPREL16, but for insns with a DS field. */
1436 HOWTO (R_PPC64_DTPREL16_DS,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_DTPREL16_DS", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xfffc, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like DTPREL16_DS, but no overflow. */
1451 HOWTO (R_PPC64_DTPREL16_LO_DS,
1452 0, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_DTPREL16_LO_DS", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xfffc, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Computes a tp-relative displacement, the difference between the value of
1466 sym+add and the value of the thread pointer (r13). */
1467 HOWTO (R_PPC64_TPREL64,
1468 0, /* rightshift */
1469 4, /* size (0 = byte, 1 = short, 2 = long) */
1470 64, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL64", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 ONES (64), /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* A 16 bit tprel reloc. */
1482 HOWTO (R_PPC64_TPREL16,
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16, but no overflow. */
1497 HOWTO (R_PPC64_TPREL16_LO,
1498 0, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_LO", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_LO, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HI,
1513 16, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HI", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HI, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HA,
1528 16, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HI, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHER,
1543 32, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHER", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHERA,
1558 32, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHERA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1572 HOWTO (R_PPC64_TPREL16_HIGHEST,
1573 48, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_dont, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_HIGHEST", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xffff, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1587 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1588 48, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_HIGHESTA", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xffff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Like TPREL16, but for insns with a DS field. */
1602 HOWTO (R_PPC64_TPREL16_DS,
1603 0, /* rightshift */
1604 1, /* size (0 = byte, 1 = short, 2 = long) */
1605 16, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_signed, /* complain_on_overflow */
1609 ppc64_elf_unhandled_reloc, /* special_function */
1610 "R_PPC64_TPREL16_DS", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0xfffc, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Like TPREL16_DS, but no overflow. */
1617 HOWTO (R_PPC64_TPREL16_LO_DS,
1618 0, /* rightshift */
1619 1, /* size (0 = byte, 1 = short, 2 = long) */
1620 16, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_dont, /* complain_on_overflow */
1624 ppc64_elf_unhandled_reloc, /* special_function */
1625 "R_PPC64_TPREL16_LO_DS", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0xfffc, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1632 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1633 to the first entry relative to the TOC base (r2). */
1634 HOWTO (R_PPC64_GOT_TLSGD16,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_signed, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16, but no overflow. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1650 0, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_LO", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1664 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1665 16, /* rightshift */
1666 1, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc64_elf_unhandled_reloc, /* special_function */
1672 "R_PPC64_GOT_TLSGD16_HI", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0xffff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1679 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1680 16, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc64_elf_unhandled_reloc, /* special_function */
1687 "R_PPC64_GOT_TLSGD16_HA", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1694 with values (sym+add)@dtpmod and zero, and computes the offset to the
1695 first entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_TLSLD16,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16, but no overflow. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_LO", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_TLSLD16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_TLSLD16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1756 the offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_DTPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_DTPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1817 offset to the entry relative to the TOC base (r2). */
1818 HOWTO (R_PPC64_GOT_TPREL16_DS,
1819 0, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_signed, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_DS", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xfffc, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_DS, but no overflow. */
1833 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1834 0, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xfffc, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1848 HOWTO (R_PPC64_GOT_TPREL16_HI,
1849 16, /* rightshift */
1850 1, /* size (0 = byte, 1 = short, 2 = long) */
1851 16, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 ppc64_elf_unhandled_reloc, /* special_function */
1856 "R_PPC64_GOT_TPREL16_HI", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0xffff, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1863 HOWTO (R_PPC64_GOT_TPREL16_HA,
1864 16, /* rightshift */
1865 1, /* size (0 = byte, 1 = short, 2 = long) */
1866 16, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 ppc64_elf_unhandled_reloc, /* special_function */
1871 "R_PPC64_GOT_TPREL16_HA", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0xffff, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876
1877 HOWTO (R_PPC64_JMP_IREL, /* type */
1878 0, /* rightshift */
1879 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 ppc64_elf_unhandled_reloc, /* special_function */
1885 "R_PPC64_JMP_IREL", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 HOWTO (R_PPC64_IRELATIVE, /* type */
1892 0, /* rightshift */
1893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1894 64, /* bitsize */
1895 FALSE, /* pc_relative */
1896 0, /* bitpos */
1897 complain_overflow_dont, /* complain_on_overflow */
1898 bfd_elf_generic_reloc, /* special_function */
1899 "R_PPC64_IRELATIVE", /* name */
1900 FALSE, /* partial_inplace */
1901 0, /* src_mask */
1902 ONES (64), /* dst_mask */
1903 FALSE), /* pcrel_offset */
1904
1905 /* A 16 bit relative relocation. */
1906 HOWTO (R_PPC64_REL16, /* type */
1907 0, /* rightshift */
1908 1, /* size (0 = byte, 1 = short, 2 = long) */
1909 16, /* bitsize */
1910 TRUE, /* pc_relative */
1911 0, /* bitpos */
1912 complain_overflow_bitfield, /* complain_on_overflow */
1913 bfd_elf_generic_reloc, /* special_function */
1914 "R_PPC64_REL16", /* name */
1915 FALSE, /* partial_inplace */
1916 0, /* src_mask */
1917 0xffff, /* dst_mask */
1918 TRUE), /* pcrel_offset */
1919
1920 /* A 16 bit relative relocation without overflow. */
1921 HOWTO (R_PPC64_REL16_LO, /* type */
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 TRUE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_dont,/* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 "R_PPC64_REL16_LO", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xffff, /* dst_mask */
1933 TRUE), /* pcrel_offset */
1934
1935 /* The high order 16 bits of a relative address. */
1936 HOWTO (R_PPC64_REL16_HI, /* type */
1937 16, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 TRUE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 bfd_elf_generic_reloc, /* special_function */
1944 "R_PPC64_REL16_HI", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xffff, /* dst_mask */
1948 TRUE), /* pcrel_offset */
1949
1950 /* The high order 16 bits of a relative address, plus 1 if the contents of
1951 the low 16 bits, treated as a signed number, is negative. */
1952 HOWTO (R_PPC64_REL16_HA, /* type */
1953 16, /* rightshift */
1954 1, /* size (0 = byte, 1 = short, 2 = long) */
1955 16, /* bitsize */
1956 TRUE, /* pc_relative */
1957 0, /* bitpos */
1958 complain_overflow_dont, /* complain_on_overflow */
1959 ppc64_elf_ha_reloc, /* special_function */
1960 "R_PPC64_REL16_HA", /* name */
1961 FALSE, /* partial_inplace */
1962 0, /* src_mask */
1963 0xffff, /* dst_mask */
1964 TRUE), /* pcrel_offset */
1965
1966 /* GNU extension to record C++ vtable hierarchy. */
1967 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1968 0, /* rightshift */
1969 0, /* size (0 = byte, 1 = short, 2 = long) */
1970 0, /* bitsize */
1971 FALSE, /* pc_relative */
1972 0, /* bitpos */
1973 complain_overflow_dont, /* complain_on_overflow */
1974 NULL, /* special_function */
1975 "R_PPC64_GNU_VTINHERIT", /* name */
1976 FALSE, /* partial_inplace */
1977 0, /* src_mask */
1978 0, /* dst_mask */
1979 FALSE), /* pcrel_offset */
1980
1981 /* GNU extension to record C++ vtable member usage. */
1982 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1983 0, /* rightshift */
1984 0, /* size (0 = byte, 1 = short, 2 = long) */
1985 0, /* bitsize */
1986 FALSE, /* pc_relative */
1987 0, /* bitpos */
1988 complain_overflow_dont, /* complain_on_overflow */
1989 NULL, /* special_function */
1990 "R_PPC64_GNU_VTENTRY", /* name */
1991 FALSE, /* partial_inplace */
1992 0, /* src_mask */
1993 0, /* dst_mask */
1994 FALSE), /* pcrel_offset */
1995 };
1996
1997 \f
1998 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1999 be done. */
2000
2001 static void
2002 ppc_howto_init (void)
2003 {
2004 unsigned int i, type;
2005
2006 for (i = 0;
2007 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2008 i++)
2009 {
2010 type = ppc64_elf_howto_raw[i].type;
2011 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2012 / sizeof (ppc64_elf_howto_table[0])));
2013 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2014 }
2015 }
2016
2017 static reloc_howto_type *
2018 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2019 bfd_reloc_code_real_type code)
2020 {
2021 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2022
2023 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2024 /* Initialize howto table if needed. */
2025 ppc_howto_init ();
2026
2027 switch (code)
2028 {
2029 default:
2030 return NULL;
2031
2032 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2033 break;
2034 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2035 break;
2036 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2037 break;
2038 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2039 break;
2040 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2041 break;
2042 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2043 break;
2044 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2045 break;
2046 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2047 break;
2048 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2053 break;
2054 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2055 break;
2056 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2059 break;
2060 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2061 break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2063 break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2065 break;
2066 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2067 break;
2068 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2069 break;
2070 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2071 break;
2072 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2073 break;
2074 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2075 break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2077 break;
2078 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2079 break;
2080 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2081 break;
2082 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2083 break;
2084 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2085 break;
2086 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2087 break;
2088 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2091 break;
2092 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2093 break;
2094 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2105 break;
2106 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2107 break;
2108 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2109 break;
2110 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2111 break;
2112 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2117 break;
2118 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2119 break;
2120 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2127 break;
2128 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2131 break;
2132 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2141 break;
2142 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2149 break;
2150 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2151 break;
2152 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2153 break;
2154 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2155 break;
2156 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2157 break;
2158 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2165 break;
2166 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2167 break;
2168 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2177 break;
2178 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2201 break;
2202 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2209 break;
2210 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2221 break;
2222 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2233 break;
2234 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2235 break;
2236 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2237 break;
2238 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2239 break;
2240 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2241 break;
2242 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2243 break;
2244 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2245 break;
2246 }
2247
2248 return ppc64_elf_howto_table[r];
2249 };
2250
2251 static reloc_howto_type *
2252 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2253 const char *r_name)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0;
2258 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2259 i++)
2260 if (ppc64_elf_howto_raw[i].name != NULL
2261 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2262 return &ppc64_elf_howto_raw[i];
2263
2264 return NULL;
2265 }
2266
2267 /* Set the howto pointer for a PowerPC ELF reloc. */
2268
2269 static void
2270 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2271 Elf_Internal_Rela *dst)
2272 {
2273 unsigned int type;
2274
2275 /* Initialize howto table if needed. */
2276 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2277 ppc_howto_init ();
2278
2279 type = ELF64_R_TYPE (dst->r_info);
2280 if (type >= (sizeof (ppc64_elf_howto_table)
2281 / sizeof (ppc64_elf_howto_table[0])))
2282 {
2283 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2284 abfd, (int) type);
2285 type = R_PPC64_NONE;
2286 }
2287 cache_ptr->howto = ppc64_elf_howto_table[type];
2288 }
2289
2290 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 /* If this is a relocatable link (output_bfd test tells us), just
2298 call the generic function. Any adjustment will be done at final
2299 link time. */
2300 if (output_bfd != NULL)
2301 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2302 input_section, output_bfd, error_message);
2303
2304 /* Adjust the addend for sign extension of the low 16 bits.
2305 We won't actually be using the low 16 bits, so trashing them
2306 doesn't matter. */
2307 reloc_entry->addend += 0x8000;
2308 return bfd_reloc_continue;
2309 }
2310
2311 static bfd_reloc_status_type
2312 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2313 void *data, asection *input_section,
2314 bfd *output_bfd, char **error_message)
2315 {
2316 if (output_bfd != NULL)
2317 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2318 input_section, output_bfd, error_message);
2319
2320 if (strcmp (symbol->section->name, ".opd") == 0
2321 && (symbol->section->owner->flags & DYNAMIC) == 0)
2322 {
2323 bfd_vma dest = opd_entry_value (symbol->section,
2324 symbol->value + reloc_entry->addend,
2325 NULL, NULL);
2326 if (dest != (bfd_vma) -1)
2327 reloc_entry->addend = dest - (symbol->value
2328 + symbol->section->output_section->vma
2329 + symbol->section->output_offset);
2330 }
2331 return bfd_reloc_continue;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 long insn;
2340 enum elf_ppc64_reloc_type r_type;
2341 bfd_size_type octets;
2342 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2343 bfd_boolean is_power4 = FALSE;
2344
2345 /* If this is a relocatable link (output_bfd test tells us), just
2346 call the generic function. Any adjustment will be done at final
2347 link time. */
2348 if (output_bfd != NULL)
2349 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2350 input_section, output_bfd, error_message);
2351
2352 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2353 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2354 insn &= ~(0x01 << 21);
2355 r_type = reloc_entry->howto->type;
2356 if (r_type == R_PPC64_ADDR14_BRTAKEN
2357 || r_type == R_PPC64_REL14_BRTAKEN)
2358 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2359
2360 if (is_power4)
2361 {
2362 /* Set 'a' bit. This is 0b00010 in BO field for branch
2363 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2364 for branch on CTR insns (BO == 1a00t or 1a01t). */
2365 if ((insn & (0x14 << 21)) == (0x04 << 21))
2366 insn |= 0x02 << 21;
2367 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2368 insn |= 0x08 << 21;
2369 else
2370 goto out;
2371 }
2372 else
2373 {
2374 bfd_vma target = 0;
2375 bfd_vma from;
2376
2377 if (!bfd_is_com_section (symbol->section))
2378 target = symbol->value;
2379 target += symbol->section->output_section->vma;
2380 target += symbol->section->output_offset;
2381 target += reloc_entry->addend;
2382
2383 from = (reloc_entry->address
2384 + input_section->output_offset
2385 + input_section->output_section->vma);
2386
2387 /* Invert 'y' bit if not the default. */
2388 if ((bfd_signed_vma) (target - from) < 0)
2389 insn ^= 0x01 << 21;
2390 }
2391 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2392 out:
2393 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2394 input_section, output_bfd, error_message);
2395 }
2396
2397 static bfd_reloc_status_type
2398 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2399 void *data, asection *input_section,
2400 bfd *output_bfd, char **error_message)
2401 {
2402 /* If this is a relocatable link (output_bfd test tells us), just
2403 call the generic function. Any adjustment will be done at final
2404 link time. */
2405 if (output_bfd != NULL)
2406 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2407 input_section, output_bfd, error_message);
2408
2409 /* Subtract the symbol section base address. */
2410 reloc_entry->addend -= symbol->section->output_section->vma;
2411 return bfd_reloc_continue;
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428
2429 /* Adjust the addend for sign extension of the low 16 bits. */
2430 reloc_entry->addend += 0x8000;
2431 return bfd_reloc_continue;
2432 }
2433
2434 static bfd_reloc_status_type
2435 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2436 void *data, asection *input_section,
2437 bfd *output_bfd, char **error_message)
2438 {
2439 bfd_vma TOCstart;
2440
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2449 if (TOCstart == 0)
2450 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2451
2452 /* Subtract the TOC base address. */
2453 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2454 return bfd_reloc_continue;
2455 }
2456
2457 static bfd_reloc_status_type
2458 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2459 void *data, asection *input_section,
2460 bfd *output_bfd, char **error_message)
2461 {
2462 bfd_vma TOCstart;
2463
2464 /* If this is a relocatable link (output_bfd test tells us), just
2465 call the generic function. Any adjustment will be done at final
2466 link time. */
2467 if (output_bfd != NULL)
2468 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2469 input_section, output_bfd, error_message);
2470
2471 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2472 if (TOCstart == 0)
2473 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2474
2475 /* Subtract the TOC base address. */
2476 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2477
2478 /* Adjust the addend for sign extension of the low 16 bits. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 bfd_vma TOCstart;
2489 bfd_size_type octets;
2490
2491 /* If this is a relocatable link (output_bfd test tells us), just
2492 call the generic function. Any adjustment will be done at final
2493 link time. */
2494 if (output_bfd != NULL)
2495 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2496 input_section, output_bfd, error_message);
2497
2498 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2499 if (TOCstart == 0)
2500 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2501
2502 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2503 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2504 return bfd_reloc_ok;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 if (error_message != NULL)
2520 {
2521 static char buf[60];
2522 sprintf (buf, "generic linker can't handle %s",
2523 reloc_entry->howto->name);
2524 *error_message = buf;
2525 }
2526 return bfd_reloc_dangerous;
2527 }
2528
2529 struct ppc64_elf_obj_tdata
2530 {
2531 struct elf_obj_tdata elf;
2532
2533 /* Shortcuts to dynamic linker sections. */
2534 asection *got;
2535 asection *relgot;
2536
2537 /* Used during garbage collection. We attach global symbols defined
2538 on removed .opd entries to this section so that the sym is removed. */
2539 asection *deleted_section;
2540
2541 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2542 sections means we potentially need one of these for each input bfd. */
2543 union {
2544 bfd_signed_vma refcount;
2545 bfd_vma offset;
2546 } tlsld_got;
2547
2548 /* A copy of relocs before they are modified for --emit-relocs. */
2549 Elf_Internal_Rela *opd_relocs;
2550 };
2551
2552 #define ppc64_elf_tdata(bfd) \
2553 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2554
2555 #define ppc64_tlsld_got(bfd) \
2556 (&ppc64_elf_tdata (bfd)->tlsld_got)
2557
2558 #define is_ppc64_elf(bfd) \
2559 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2560 && elf_object_id (bfd) == PPC64_ELF_TDATA)
2561
2562 /* Override the generic function because we store some extras. */
2563
2564 static bfd_boolean
2565 ppc64_elf_mkobject (bfd *abfd)
2566 {
2567 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2568 PPC64_ELF_TDATA);
2569 }
2570
2571 /* Fix bad default arch selected for a 64 bit input bfd when the
2572 default is 32 bit. */
2573
2574 static bfd_boolean
2575 ppc64_elf_object_p (bfd *abfd)
2576 {
2577 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2578 {
2579 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2580
2581 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2582 {
2583 /* Relies on arch after 32 bit default being 64 bit default. */
2584 abfd->arch_info = abfd->arch_info->next;
2585 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2586 }
2587 }
2588 return TRUE;
2589 }
2590
2591 /* Support for core dump NOTE sections. */
2592
2593 static bfd_boolean
2594 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2595 {
2596 size_t offset, size;
2597
2598 if (note->descsz != 504)
2599 return FALSE;
2600
2601 /* pr_cursig */
2602 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2603
2604 /* pr_pid */
2605 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2606
2607 /* pr_reg */
2608 offset = 112;
2609 size = 384;
2610
2611 /* Make a ".reg/999" section. */
2612 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2613 size, note->descpos + offset);
2614 }
2615
2616 static bfd_boolean
2617 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2618 {
2619 if (note->descsz != 136)
2620 return FALSE;
2621
2622 elf_tdata (abfd)->core_program
2623 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2624 elf_tdata (abfd)->core_command
2625 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2626
2627 return TRUE;
2628 }
2629
2630 static char *
2631 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2632 ...)
2633 {
2634 switch (note_type)
2635 {
2636 default:
2637 return NULL;
2638
2639 case NT_PRPSINFO:
2640 {
2641 char data[136];
2642 va_list ap;
2643
2644 va_start (ap, note_type);
2645 memset (data, 0, 40);
2646 strncpy (data + 40, va_arg (ap, const char *), 16);
2647 strncpy (data + 56, va_arg (ap, const char *), 80);
2648 va_end (ap);
2649 return elfcore_write_note (abfd, buf, bufsiz,
2650 "CORE", note_type, data, sizeof (data));
2651 }
2652
2653 case NT_PRSTATUS:
2654 {
2655 char data[504];
2656 va_list ap;
2657 long pid;
2658 int cursig;
2659 const void *greg;
2660
2661 va_start (ap, note_type);
2662 memset (data, 0, 112);
2663 pid = va_arg (ap, long);
2664 bfd_put_32 (abfd, pid, data + 32);
2665 cursig = va_arg (ap, int);
2666 bfd_put_16 (abfd, cursig, data + 12);
2667 greg = va_arg (ap, const void *);
2668 memcpy (data + 112, greg, 384);
2669 memset (data + 496, 0, 8);
2670 va_end (ap);
2671 return elfcore_write_note (abfd, buf, bufsiz,
2672 "CORE", note_type, data, sizeof (data));
2673 }
2674 }
2675 }
2676
2677 /* Merge backend specific data from an object file to the output
2678 object file when linking. */
2679
2680 static bfd_boolean
2681 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2682 {
2683 /* Check if we have the same endianess. */
2684 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2685 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2686 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2687 {
2688 const char *msg;
2689
2690 if (bfd_big_endian (ibfd))
2691 msg = _("%B: compiled for a big endian system "
2692 "and target is little endian");
2693 else
2694 msg = _("%B: compiled for a little endian system "
2695 "and target is big endian");
2696
2697 (*_bfd_error_handler) (msg, ibfd);
2698
2699 bfd_set_error (bfd_error_wrong_format);
2700 return FALSE;
2701 }
2702
2703 return TRUE;
2704 }
2705
2706 /* Add extra PPC sections. */
2707
2708 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2709 {
2710 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2711 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2712 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2713 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2714 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2715 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2716 { NULL, 0, 0, 0, 0 }
2717 };
2718
2719 enum _ppc64_sec_type {
2720 sec_normal = 0,
2721 sec_opd = 1,
2722 sec_toc = 2
2723 };
2724
2725 struct _ppc64_elf_section_data
2726 {
2727 struct bfd_elf_section_data elf;
2728
2729 union
2730 {
2731 /* An array with one entry for each opd function descriptor. */
2732 struct _opd_sec_data
2733 {
2734 /* Points to the function code section for local opd entries. */
2735 asection **func_sec;
2736
2737 /* After editing .opd, adjust references to opd local syms. */
2738 long *adjust;
2739 } opd;
2740
2741 /* An array for toc sections, indexed by offset/8. */
2742 struct _toc_sec_data
2743 {
2744 /* Specifies the relocation symbol index used at a given toc offset. */
2745 unsigned *symndx;
2746
2747 /* And the relocation addend. */
2748 bfd_vma *add;
2749 } toc;
2750 } u;
2751
2752 enum _ppc64_sec_type sec_type:2;
2753
2754 /* Flag set when small branches are detected. Used to
2755 select suitable defaults for the stub group size. */
2756 unsigned int has_14bit_branch:1;
2757 };
2758
2759 #define ppc64_elf_section_data(sec) \
2760 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2761
2762 static bfd_boolean
2763 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2764 {
2765 if (!sec->used_by_bfd)
2766 {
2767 struct _ppc64_elf_section_data *sdata;
2768 bfd_size_type amt = sizeof (*sdata);
2769
2770 sdata = bfd_zalloc (abfd, amt);
2771 if (sdata == NULL)
2772 return FALSE;
2773 sec->used_by_bfd = sdata;
2774 }
2775
2776 return _bfd_elf_new_section_hook (abfd, sec);
2777 }
2778
2779 static struct _opd_sec_data *
2780 get_opd_info (asection * sec)
2781 {
2782 if (sec != NULL
2783 && ppc64_elf_section_data (sec) != NULL
2784 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2785 return &ppc64_elf_section_data (sec)->u.opd;
2786 return NULL;
2787 }
2788 \f
2789 /* Parameters for the qsort hook. */
2790 static bfd_boolean synthetic_relocatable;
2791
2792 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2793
2794 static int
2795 compare_symbols (const void *ap, const void *bp)
2796 {
2797 const asymbol *a = * (const asymbol **) ap;
2798 const asymbol *b = * (const asymbol **) bp;
2799
2800 /* Section symbols first. */
2801 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2802 return -1;
2803 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2804 return 1;
2805
2806 /* then .opd symbols. */
2807 if (strcmp (a->section->name, ".opd") == 0
2808 && strcmp (b->section->name, ".opd") != 0)
2809 return -1;
2810 if (strcmp (a->section->name, ".opd") != 0
2811 && strcmp (b->section->name, ".opd") == 0)
2812 return 1;
2813
2814 /* then other code symbols. */
2815 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2816 == (SEC_CODE | SEC_ALLOC)
2817 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2818 != (SEC_CODE | SEC_ALLOC))
2819 return -1;
2820
2821 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2822 != (SEC_CODE | SEC_ALLOC)
2823 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2824 == (SEC_CODE | SEC_ALLOC))
2825 return 1;
2826
2827 if (synthetic_relocatable)
2828 {
2829 if (a->section->id < b->section->id)
2830 return -1;
2831
2832 if (a->section->id > b->section->id)
2833 return 1;
2834 }
2835
2836 if (a->value + a->section->vma < b->value + b->section->vma)
2837 return -1;
2838
2839 if (a->value + a->section->vma > b->value + b->section->vma)
2840 return 1;
2841
2842 /* For syms with the same value, prefer strong dynamic global function
2843 syms over other syms. */
2844 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2845 return -1;
2846
2847 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2848 return 1;
2849
2850 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2851 return -1;
2852
2853 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2854 return 1;
2855
2856 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2857 return -1;
2858
2859 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2860 return 1;
2861
2862 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2863 return -1;
2864
2865 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2866 return 1;
2867
2868 return 0;
2869 }
2870
2871 /* Search SYMS for a symbol of the given VALUE. */
2872
2873 static asymbol *
2874 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2875 {
2876 long mid;
2877
2878 if (id == -1)
2879 {
2880 while (lo < hi)
2881 {
2882 mid = (lo + hi) >> 1;
2883 if (syms[mid]->value + syms[mid]->section->vma < value)
2884 lo = mid + 1;
2885 else if (syms[mid]->value + syms[mid]->section->vma > value)
2886 hi = mid;
2887 else
2888 return syms[mid];
2889 }
2890 }
2891 else
2892 {
2893 while (lo < hi)
2894 {
2895 mid = (lo + hi) >> 1;
2896 if (syms[mid]->section->id < id)
2897 lo = mid + 1;
2898 else if (syms[mid]->section->id > id)
2899 hi = mid;
2900 else if (syms[mid]->value < value)
2901 lo = mid + 1;
2902 else if (syms[mid]->value > value)
2903 hi = mid;
2904 else
2905 return syms[mid];
2906 }
2907 }
2908 return NULL;
2909 }
2910
2911 static bfd_boolean
2912 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2913 {
2914 bfd_vma vma = *(bfd_vma *) ptr;
2915 return ((section->flags & SEC_ALLOC) != 0
2916 && section->vma <= vma
2917 && vma < section->vma + section->size);
2918 }
2919
2920 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2921 entry syms. Also generate @plt symbols for the glink branch table. */
2922
2923 static long
2924 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2925 long static_count, asymbol **static_syms,
2926 long dyn_count, asymbol **dyn_syms,
2927 asymbol **ret)
2928 {
2929 asymbol *s;
2930 long i;
2931 long count;
2932 char *names;
2933 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2934 asection *opd;
2935 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2936 asymbol **syms;
2937
2938 *ret = NULL;
2939
2940 opd = bfd_get_section_by_name (abfd, ".opd");
2941 if (opd == NULL)
2942 return 0;
2943
2944 symcount = static_count;
2945 if (!relocatable)
2946 symcount += dyn_count;
2947 if (symcount == 0)
2948 return 0;
2949
2950 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2951 if (syms == NULL)
2952 return -1;
2953
2954 if (!relocatable && static_count != 0 && dyn_count != 0)
2955 {
2956 /* Use both symbol tables. */
2957 memcpy (syms, static_syms, static_count * sizeof (*syms));
2958 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2959 }
2960 else if (!relocatable && static_count == 0)
2961 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2962 else
2963 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2964
2965 synthetic_relocatable = relocatable;
2966 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2967
2968 if (!relocatable && symcount > 1)
2969 {
2970 long j;
2971 /* Trim duplicate syms, since we may have merged the normal and
2972 dynamic symbols. Actually, we only care about syms that have
2973 different values, so trim any with the same value. */
2974 for (i = 1, j = 1; i < symcount; ++i)
2975 if (syms[i - 1]->value + syms[i - 1]->section->vma
2976 != syms[i]->value + syms[i]->section->vma)
2977 syms[j++] = syms[i];
2978 symcount = j;
2979 }
2980
2981 i = 0;
2982 if (strcmp (syms[i]->section->name, ".opd") == 0)
2983 ++i;
2984 codesecsym = i;
2985
2986 for (; i < symcount; ++i)
2987 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2988 != (SEC_CODE | SEC_ALLOC))
2989 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2990 break;
2991 codesecsymend = i;
2992
2993 for (; i < symcount; ++i)
2994 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2995 break;
2996 secsymend = i;
2997
2998 for (; i < symcount; ++i)
2999 if (strcmp (syms[i]->section->name, ".opd") != 0)
3000 break;
3001 opdsymend = i;
3002
3003 for (; i < symcount; ++i)
3004 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3005 != (SEC_CODE | SEC_ALLOC))
3006 break;
3007 symcount = i;
3008
3009 count = 0;
3010
3011 if (relocatable)
3012 {
3013 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3014 arelent *r;
3015 size_t size;
3016 long relcount;
3017
3018 if (opdsymend == secsymend)
3019 goto done;
3020
3021 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3022 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3023 if (relcount == 0)
3024 goto done;
3025
3026 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3027 {
3028 count = -1;
3029 goto done;
3030 }
3031
3032 size = 0;
3033 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3034 {
3035 asymbol *sym;
3036
3037 while (r < opd->relocation + relcount
3038 && r->address < syms[i]->value + opd->vma)
3039 ++r;
3040
3041 if (r == opd->relocation + relcount)
3042 break;
3043
3044 if (r->address != syms[i]->value + opd->vma)
3045 continue;
3046
3047 if (r->howto->type != R_PPC64_ADDR64)
3048 continue;
3049
3050 sym = *r->sym_ptr_ptr;
3051 if (!sym_exists_at (syms, opdsymend, symcount,
3052 sym->section->id, sym->value + r->addend))
3053 {
3054 ++count;
3055 size += sizeof (asymbol);
3056 size += strlen (syms[i]->name) + 2;
3057 }
3058 }
3059
3060 s = *ret = bfd_malloc (size);
3061 if (s == NULL)
3062 {
3063 count = -1;
3064 goto done;
3065 }
3066
3067 names = (char *) (s + count);
3068
3069 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3070 {
3071 asymbol *sym;
3072
3073 while (r < opd->relocation + relcount
3074 && r->address < syms[i]->value + opd->vma)
3075 ++r;
3076
3077 if (r == opd->relocation + relcount)
3078 break;
3079
3080 if (r->address != syms[i]->value + opd->vma)
3081 continue;
3082
3083 if (r->howto->type != R_PPC64_ADDR64)
3084 continue;
3085
3086 sym = *r->sym_ptr_ptr;
3087 if (!sym_exists_at (syms, opdsymend, symcount,
3088 sym->section->id, sym->value + r->addend))
3089 {
3090 size_t len;
3091
3092 *s = *syms[i];
3093 s->flags |= BSF_SYNTHETIC;
3094 s->section = sym->section;
3095 s->value = sym->value + r->addend;
3096 s->name = names;
3097 *names++ = '.';
3098 len = strlen (syms[i]->name);
3099 memcpy (names, syms[i]->name, len + 1);
3100 names += len + 1;
3101 /* Have udata.p point back to the original symbol this
3102 synthetic symbol was derived from. */
3103 s->udata.p = syms[i];
3104 s++;
3105 }
3106 }
3107 }
3108 else
3109 {
3110 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3111 bfd_byte *contents;
3112 size_t size;
3113 long plt_count = 0;
3114 bfd_vma glink_vma = 0, resolv_vma = 0;
3115 asection *dynamic, *glink = NULL, *relplt = NULL;
3116 arelent *p;
3117
3118 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3119 {
3120 if (contents)
3121 {
3122 free_contents_and_exit:
3123 free (contents);
3124 }
3125 count = -1;
3126 goto done;
3127 }
3128
3129 size = 0;
3130 for (i = secsymend; i < opdsymend; ++i)
3131 {
3132 bfd_vma ent;
3133
3134 /* Ignore bogus symbols. */
3135 if (syms[i]->value > opd->size - 8)
3136 continue;
3137
3138 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3139 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3140 {
3141 ++count;
3142 size += sizeof (asymbol);
3143 size += strlen (syms[i]->name) + 2;
3144 }
3145 }
3146
3147 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3148 if (dyn_count != 0
3149 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3150 {
3151 bfd_byte *dynbuf, *extdyn, *extdynend;
3152 size_t extdynsize;
3153 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3154
3155 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3156 goto free_contents_and_exit;
3157
3158 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3159 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3160
3161 extdyn = dynbuf;
3162 extdynend = extdyn + dynamic->size;
3163 for (; extdyn < extdynend; extdyn += extdynsize)
3164 {
3165 Elf_Internal_Dyn dyn;
3166 (*swap_dyn_in) (abfd, extdyn, &dyn);
3167
3168 if (dyn.d_tag == DT_NULL)
3169 break;
3170
3171 if (dyn.d_tag == DT_PPC64_GLINK)
3172 {
3173 /* The first glink stub starts at offset 32; see comment in
3174 ppc64_elf_finish_dynamic_sections. */
3175 glink_vma = dyn.d_un.d_val + 32;
3176 /* The .glink section usually does not survive the final
3177 link; search for the section (usually .text) where the
3178 glink stubs now reside. */
3179 glink = bfd_sections_find_if (abfd, section_covers_vma,
3180 &glink_vma);
3181 break;
3182 }
3183 }
3184
3185 free (dynbuf);
3186 }
3187
3188 if (glink != NULL)
3189 {
3190 /* Determine __glink trampoline by reading the relative branch
3191 from the first glink stub. */
3192 bfd_byte buf[4];
3193 if (bfd_get_section_contents (abfd, glink, buf,
3194 glink_vma + 4 - glink->vma, 4))
3195 {
3196 unsigned int insn = bfd_get_32 (abfd, buf);
3197 insn ^= B_DOT;
3198 if ((insn & ~0x3fffffc) == 0)
3199 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3200 }
3201
3202 if (resolv_vma)
3203 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3204
3205 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3206 if (relplt != NULL)
3207 {
3208 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3209 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3210 goto free_contents_and_exit;
3211
3212 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3213 size += plt_count * sizeof (asymbol);
3214
3215 p = relplt->relocation;
3216 for (i = 0; i < plt_count; i++, p++)
3217 {
3218 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3219 if (p->addend != 0)
3220 size += sizeof ("+0x") - 1 + 16;
3221 }
3222 }
3223 }
3224
3225 s = *ret = bfd_malloc (size);
3226 if (s == NULL)
3227 goto free_contents_and_exit;
3228
3229 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3230
3231 for (i = secsymend; i < opdsymend; ++i)
3232 {
3233 bfd_vma ent;
3234
3235 if (syms[i]->value > opd->size - 8)
3236 continue;
3237
3238 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3239 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3240 {
3241 long lo, hi;
3242 size_t len;
3243 asection *sec = abfd->sections;
3244
3245 *s = *syms[i];
3246 lo = codesecsym;
3247 hi = codesecsymend;
3248 while (lo < hi)
3249 {
3250 long mid = (lo + hi) >> 1;
3251 if (syms[mid]->section->vma < ent)
3252 lo = mid + 1;
3253 else if (syms[mid]->section->vma > ent)
3254 hi = mid;
3255 else
3256 {
3257 sec = syms[mid]->section;
3258 break;
3259 }
3260 }
3261
3262 if (lo >= hi && lo > codesecsym)
3263 sec = syms[lo - 1]->section;
3264
3265 for (; sec != NULL; sec = sec->next)
3266 {
3267 if (sec->vma > ent)
3268 break;
3269 if ((sec->flags & SEC_ALLOC) == 0
3270 || (sec->flags & SEC_LOAD) == 0)
3271 break;
3272 if ((sec->flags & SEC_CODE) != 0)
3273 s->section = sec;
3274 }
3275 s->flags |= BSF_SYNTHETIC;
3276 s->value = ent - s->section->vma;
3277 s->name = names;
3278 *names++ = '.';
3279 len = strlen (syms[i]->name);
3280 memcpy (names, syms[i]->name, len + 1);
3281 names += len + 1;
3282 /* Have udata.p point back to the original symbol this
3283 synthetic symbol was derived from. */
3284 s->udata.p = syms[i];
3285 s++;
3286 }
3287 }
3288 free (contents);
3289
3290 if (glink != NULL && relplt != NULL)
3291 {
3292 if (resolv_vma)
3293 {
3294 /* Add a symbol for the main glink trampoline. */
3295 memset (s, 0, sizeof *s);
3296 s->the_bfd = abfd;
3297 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3298 s->section = glink;
3299 s->value = resolv_vma - glink->vma;
3300 s->name = names;
3301 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3302 names += sizeof ("__glink_PLTresolve");
3303 s++;
3304 count++;
3305 }
3306
3307 /* FIXME: It would be very much nicer to put sym@plt on the
3308 stub rather than on the glink branch table entry. The
3309 objdump disassembler would then use a sensible symbol
3310 name on plt calls. The difficulty in doing so is
3311 a) finding the stubs, and,
3312 b) matching stubs against plt entries, and,
3313 c) there can be multiple stubs for a given plt entry.
3314
3315 Solving (a) could be done by code scanning, but older
3316 ppc64 binaries used different stubs to current code.
3317 (b) is the tricky one since you need to known the toc
3318 pointer for at least one function that uses a pic stub to
3319 be able to calculate the plt address referenced.
3320 (c) means gdb would need to set multiple breakpoints (or
3321 find the glink branch itself) when setting breakpoints
3322 for pending shared library loads. */
3323 p = relplt->relocation;
3324 for (i = 0; i < plt_count; i++, p++)
3325 {
3326 size_t len;
3327
3328 *s = **p->sym_ptr_ptr;
3329 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3330 we are defining a symbol, ensure one of them is set. */
3331 if ((s->flags & BSF_LOCAL) == 0)
3332 s->flags |= BSF_GLOBAL;
3333 s->flags |= BSF_SYNTHETIC;
3334 s->section = glink;
3335 s->value = glink_vma - glink->vma;
3336 s->name = names;
3337 s->udata.p = NULL;
3338 len = strlen ((*p->sym_ptr_ptr)->name);
3339 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3340 names += len;
3341 if (p->addend != 0)
3342 {
3343 memcpy (names, "+0x", sizeof ("+0x") - 1);
3344 names += sizeof ("+0x") - 1;
3345 bfd_sprintf_vma (abfd, names, p->addend);
3346 names += strlen (names);
3347 }
3348 memcpy (names, "@plt", sizeof ("@plt"));
3349 names += sizeof ("@plt");
3350 s++;
3351 glink_vma += 8;
3352 if (i >= 0x8000)
3353 glink_vma += 4;
3354 }
3355 count += plt_count;
3356 }
3357 }
3358
3359 done:
3360 free (syms);
3361 return count;
3362 }
3363 \f
3364 /* The following functions are specific to the ELF linker, while
3365 functions above are used generally. Those named ppc64_elf_* are
3366 called by the main ELF linker code. They appear in this file more
3367 or less in the order in which they are called. eg.
3368 ppc64_elf_check_relocs is called early in the link process,
3369 ppc64_elf_finish_dynamic_sections is one of the last functions
3370 called.
3371
3372 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3373 functions have both a function code symbol and a function descriptor
3374 symbol. A call to foo in a relocatable object file looks like:
3375
3376 . .text
3377 . x:
3378 . bl .foo
3379 . nop
3380
3381 The function definition in another object file might be:
3382
3383 . .section .opd
3384 . foo: .quad .foo
3385 . .quad .TOC.@tocbase
3386 . .quad 0
3387 .
3388 . .text
3389 . .foo: blr
3390
3391 When the linker resolves the call during a static link, the branch
3392 unsurprisingly just goes to .foo and the .opd information is unused.
3393 If the function definition is in a shared library, things are a little
3394 different: The call goes via a plt call stub, the opd information gets
3395 copied to the plt, and the linker patches the nop.
3396
3397 . x:
3398 . bl .foo_stub
3399 . ld 2,40(1)
3400 .
3401 .
3402 . .foo_stub:
3403 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3404 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3405 . std 2,40(1) # this is the general idea
3406 . ld 11,0(12)
3407 . ld 2,8(12)
3408 . mtctr 11
3409 . ld 11,16(12)
3410 . bctr
3411 .
3412 . .section .plt
3413 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3414
3415 The "reloc ()" notation is supposed to indicate that the linker emits
3416 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3417 copying.
3418
3419 What are the difficulties here? Well, firstly, the relocations
3420 examined by the linker in check_relocs are against the function code
3421 sym .foo, while the dynamic relocation in the plt is emitted against
3422 the function descriptor symbol, foo. Somewhere along the line, we need
3423 to carefully copy dynamic link information from one symbol to the other.
3424 Secondly, the generic part of the elf linker will make .foo a dynamic
3425 symbol as is normal for most other backends. We need foo dynamic
3426 instead, at least for an application final link. However, when
3427 creating a shared library containing foo, we need to have both symbols
3428 dynamic so that references to .foo are satisfied during the early
3429 stages of linking. Otherwise the linker might decide to pull in a
3430 definition from some other object, eg. a static library.
3431
3432 Update: As of August 2004, we support a new convention. Function
3433 calls may use the function descriptor symbol, ie. "bl foo". This
3434 behaves exactly as "bl .foo". */
3435
3436 /* The linker needs to keep track of the number of relocs that it
3437 decides to copy as dynamic relocs in check_relocs for each symbol.
3438 This is so that it can later discard them if they are found to be
3439 unnecessary. We store the information in a field extending the
3440 regular ELF linker hash table. */
3441
3442 struct ppc_dyn_relocs
3443 {
3444 struct ppc_dyn_relocs *next;
3445
3446 /* The input section of the reloc. */
3447 asection *sec;
3448
3449 /* Total number of relocs copied for the input section. */
3450 bfd_size_type count;
3451
3452 /* Number of pc-relative relocs copied for the input section. */
3453 bfd_size_type pc_count;
3454 };
3455
3456 /* Track GOT entries needed for a given symbol. We might need more
3457 than one got entry per symbol. */
3458 struct got_entry
3459 {
3460 struct got_entry *next;
3461
3462 /* The symbol addend that we'll be placing in the GOT. */
3463 bfd_vma addend;
3464
3465 /* Unlike other ELF targets, we use separate GOT entries for the same
3466 symbol referenced from different input files. This is to support
3467 automatic multiple TOC/GOT sections, where the TOC base can vary
3468 from one input file to another. FIXME: After group_sections we
3469 ought to merge entries within the group.
3470
3471 Point to the BFD owning this GOT entry. */
3472 bfd *owner;
3473
3474 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3475 TLS_TPREL or TLS_DTPREL for tls entries. */
3476 char tls_type;
3477
3478 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3479 union
3480 {
3481 bfd_signed_vma refcount;
3482 bfd_vma offset;
3483 } got;
3484 };
3485
3486 /* The same for PLT. */
3487 struct plt_entry
3488 {
3489 struct plt_entry *next;
3490
3491 bfd_vma addend;
3492
3493 union
3494 {
3495 bfd_signed_vma refcount;
3496 bfd_vma offset;
3497 } plt;
3498 };
3499
3500 /* Of those relocs that might be copied as dynamic relocs, this function
3501 selects those that must be copied when linking a shared library,
3502 even when the symbol is local. */
3503
3504 static int
3505 must_be_dyn_reloc (struct bfd_link_info *info,
3506 enum elf_ppc64_reloc_type r_type)
3507 {
3508 switch (r_type)
3509 {
3510 default:
3511 return 1;
3512
3513 case R_PPC64_REL32:
3514 case R_PPC64_REL64:
3515 case R_PPC64_REL30:
3516 return 0;
3517
3518 case R_PPC64_TPREL16:
3519 case R_PPC64_TPREL16_LO:
3520 case R_PPC64_TPREL16_HI:
3521 case R_PPC64_TPREL16_HA:
3522 case R_PPC64_TPREL16_DS:
3523 case R_PPC64_TPREL16_LO_DS:
3524 case R_PPC64_TPREL16_HIGHER:
3525 case R_PPC64_TPREL16_HIGHERA:
3526 case R_PPC64_TPREL16_HIGHEST:
3527 case R_PPC64_TPREL16_HIGHESTA:
3528 case R_PPC64_TPREL64:
3529 return !info->executable;
3530 }
3531 }
3532
3533 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3534 copying dynamic variables from a shared lib into an app's dynbss
3535 section, and instead use a dynamic relocation to point into the
3536 shared lib. With code that gcc generates, it's vital that this be
3537 enabled; In the PowerPC64 ABI, the address of a function is actually
3538 the address of a function descriptor, which resides in the .opd
3539 section. gcc uses the descriptor directly rather than going via the
3540 GOT as some other ABI's do, which means that initialized function
3541 pointers must reference the descriptor. Thus, a function pointer
3542 initialized to the address of a function in a shared library will
3543 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3544 redefines the function descriptor symbol to point to the copy. This
3545 presents a problem as a plt entry for that function is also
3546 initialized from the function descriptor symbol and the copy reloc
3547 may not be initialized first. */
3548 #define ELIMINATE_COPY_RELOCS 1
3549
3550 /* Section name for stubs is the associated section name plus this
3551 string. */
3552 #define STUB_SUFFIX ".stub"
3553
3554 /* Linker stubs.
3555 ppc_stub_long_branch:
3556 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3557 destination, but a 24 bit branch in a stub section will reach.
3558 . b dest
3559
3560 ppc_stub_plt_branch:
3561 Similar to the above, but a 24 bit branch in the stub section won't
3562 reach its destination.
3563 . addis %r12,%r2,xxx@toc@ha
3564 . ld %r11,xxx@toc@l(%r12)
3565 . mtctr %r11
3566 . bctr
3567
3568 ppc_stub_plt_call:
3569 Used to call a function in a shared library. If it so happens that
3570 the plt entry referenced crosses a 64k boundary, then an extra
3571 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3572 . addis %r12,%r2,xxx@toc@ha
3573 . std %r2,40(%r1)
3574 . ld %r11,xxx+0@toc@l(%r12)
3575 . mtctr %r11
3576 . ld %r2,xxx+8@toc@l(%r12)
3577 . ld %r11,xxx+16@toc@l(%r12)
3578 . bctr
3579
3580 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3581 code to adjust the value and save r2 to support multiple toc sections.
3582 A ppc_stub_long_branch with an r2 offset looks like:
3583 . std %r2,40(%r1)
3584 . addis %r2,%r2,off@ha
3585 . addi %r2,%r2,off@l
3586 . b dest
3587
3588 A ppc_stub_plt_branch with an r2 offset looks like:
3589 . std %r2,40(%r1)
3590 . addis %r12,%r2,xxx@toc@ha
3591 . ld %r11,xxx@toc@l(%r12)
3592 . addis %r2,%r2,off@ha
3593 . addi %r2,%r2,off@l
3594 . mtctr %r11
3595 . bctr
3596
3597 In cases where the "addis" instruction would add zero, the "addis" is
3598 omitted and following instructions modified slightly in some cases.
3599 */
3600
3601 enum ppc_stub_type {
3602 ppc_stub_none,
3603 ppc_stub_long_branch,
3604 ppc_stub_long_branch_r2off,
3605 ppc_stub_plt_branch,
3606 ppc_stub_plt_branch_r2off,
3607 ppc_stub_plt_call
3608 };
3609
3610 struct ppc_stub_hash_entry {
3611
3612 /* Base hash table entry structure. */
3613 struct bfd_hash_entry root;
3614
3615 enum ppc_stub_type stub_type;
3616
3617 /* The stub section. */
3618 asection *stub_sec;
3619
3620 /* Offset within stub_sec of the beginning of this stub. */
3621 bfd_vma stub_offset;
3622
3623 /* Given the symbol's value and its section we can determine its final
3624 value when building the stubs (so the stub knows where to jump. */
3625 bfd_vma target_value;
3626 asection *target_section;
3627
3628 /* The symbol table entry, if any, that this was derived from. */
3629 struct ppc_link_hash_entry *h;
3630 struct plt_entry *plt_ent;
3631
3632 /* And the reloc addend that this was derived from. */
3633 bfd_vma addend;
3634
3635 /* Where this stub is being called from, or, in the case of combined
3636 stub sections, the first input section in the group. */
3637 asection *id_sec;
3638 };
3639
3640 struct ppc_branch_hash_entry {
3641
3642 /* Base hash table entry structure. */
3643 struct bfd_hash_entry root;
3644
3645 /* Offset within branch lookup table. */
3646 unsigned int offset;
3647
3648 /* Generation marker. */
3649 unsigned int iter;
3650 };
3651
3652 struct ppc_link_hash_entry
3653 {
3654 struct elf_link_hash_entry elf;
3655
3656 union {
3657 /* A pointer to the most recently used stub hash entry against this
3658 symbol. */
3659 struct ppc_stub_hash_entry *stub_cache;
3660
3661 /* A pointer to the next symbol starting with a '.' */
3662 struct ppc_link_hash_entry *next_dot_sym;
3663 } u;
3664
3665 /* Track dynamic relocs copied for this symbol. */
3666 struct ppc_dyn_relocs *dyn_relocs;
3667
3668 /* Link between function code and descriptor symbols. */
3669 struct ppc_link_hash_entry *oh;
3670
3671 /* Flag function code and descriptor symbols. */
3672 unsigned int is_func:1;
3673 unsigned int is_func_descriptor:1;
3674 unsigned int fake:1;
3675
3676 /* Whether global opd/toc sym has been adjusted or not.
3677 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3678 should be set for all globals defined in any opd/toc section. */
3679 unsigned int adjust_done:1;
3680
3681 /* Set if we twiddled this symbol to weak at some stage. */
3682 unsigned int was_undefined:1;
3683
3684 /* Contexts in which symbol is used in the GOT (or TOC).
3685 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3686 corresponding relocs are encountered during check_relocs.
3687 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3688 indicate the corresponding GOT entry type is not needed.
3689 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3690 a TPREL one. We use a separate flag rather than setting TPREL
3691 just for convenience in distinguishing the two cases. */
3692 #define TLS_GD 1 /* GD reloc. */
3693 #define TLS_LD 2 /* LD reloc. */
3694 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3695 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3696 #define TLS_TLS 16 /* Any TLS reloc. */
3697 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3698 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3699 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3700 char tls_mask;
3701 };
3702
3703 /* ppc64 ELF linker hash table. */
3704
3705 struct ppc_link_hash_table
3706 {
3707 struct elf_link_hash_table elf;
3708
3709 /* The stub hash table. */
3710 struct bfd_hash_table stub_hash_table;
3711
3712 /* Another hash table for plt_branch stubs. */
3713 struct bfd_hash_table branch_hash_table;
3714
3715 /* Linker stub bfd. */
3716 bfd *stub_bfd;
3717
3718 /* Linker call-backs. */
3719 asection * (*add_stub_section) (const char *, asection *);
3720 void (*layout_sections_again) (void);
3721
3722 /* Array to keep track of which stub sections have been created, and
3723 information on stub grouping. */
3724 struct map_stub {
3725 /* This is the section to which stubs in the group will be attached. */
3726 asection *link_sec;
3727 /* The stub section. */
3728 asection *stub_sec;
3729 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3730 bfd_vma toc_off;
3731 } *stub_group;
3732
3733 /* Temp used when calculating TOC pointers. */
3734 bfd_vma toc_curr;
3735
3736 /* Highest input section id. */
3737 int top_id;
3738
3739 /* Highest output section index. */
3740 int top_index;
3741
3742 /* Used when adding symbols. */
3743 struct ppc_link_hash_entry *dot_syms;
3744
3745 /* List of input sections for each output section. */
3746 asection **input_list;
3747
3748 /* Short-cuts to get to dynamic linker sections. */
3749 asection *got;
3750 asection *plt;
3751 asection *relplt;
3752 asection *iplt;
3753 asection *reliplt;
3754 asection *dynbss;
3755 asection *relbss;
3756 asection *glink;
3757 asection *sfpr;
3758 asection *brlt;
3759 asection *relbrlt;
3760
3761 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3762 struct ppc_link_hash_entry *tls_get_addr;
3763 struct ppc_link_hash_entry *tls_get_addr_fd;
3764
3765 /* Statistics. */
3766 unsigned long stub_count[ppc_stub_plt_call];
3767
3768 /* Number of stubs against global syms. */
3769 unsigned long stub_globals;
3770
3771 /* Set if we should emit symbols for stubs. */
3772 unsigned int emit_stub_syms:1;
3773
3774 /* Set if __tls_get_addr optimization should not be done. */
3775 unsigned int no_tls_get_addr_opt:1;
3776
3777 /* Support for multiple toc sections. */
3778 unsigned int no_multi_toc:1;
3779 unsigned int multi_toc_needed:1;
3780
3781 /* Set on error. */
3782 unsigned int stub_error:1;
3783
3784 /* Temp used by ppc64_elf_process_dot_syms. */
3785 unsigned int twiddled_syms:1;
3786
3787 /* Incremented every time we size stubs. */
3788 unsigned int stub_iteration;
3789
3790 /* Small local sym cache. */
3791 struct sym_cache sym_cache;
3792 };
3793
3794 /* Rename some of the generic section flags to better document how they
3795 are used here. */
3796 #define has_toc_reloc has_gp_reloc
3797 #define makes_toc_func_call need_finalize_relax
3798 #define call_check_in_progress reloc_done
3799
3800 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3801
3802 #define ppc_hash_table(p) \
3803 ((struct ppc_link_hash_table *) ((p)->hash))
3804
3805 #define ppc_stub_hash_lookup(table, string, create, copy) \
3806 ((struct ppc_stub_hash_entry *) \
3807 bfd_hash_lookup ((table), (string), (create), (copy)))
3808
3809 #define ppc_branch_hash_lookup(table, string, create, copy) \
3810 ((struct ppc_branch_hash_entry *) \
3811 bfd_hash_lookup ((table), (string), (create), (copy)))
3812
3813 /* Create an entry in the stub hash table. */
3814
3815 static struct bfd_hash_entry *
3816 stub_hash_newfunc (struct bfd_hash_entry *entry,
3817 struct bfd_hash_table *table,
3818 const char *string)
3819 {
3820 /* Allocate the structure if it has not already been allocated by a
3821 subclass. */
3822 if (entry == NULL)
3823 {
3824 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3825 if (entry == NULL)
3826 return entry;
3827 }
3828
3829 /* Call the allocation method of the superclass. */
3830 entry = bfd_hash_newfunc (entry, table, string);
3831 if (entry != NULL)
3832 {
3833 struct ppc_stub_hash_entry *eh;
3834
3835 /* Initialize the local fields. */
3836 eh = (struct ppc_stub_hash_entry *) entry;
3837 eh->stub_type = ppc_stub_none;
3838 eh->stub_sec = NULL;
3839 eh->stub_offset = 0;
3840 eh->target_value = 0;
3841 eh->target_section = NULL;
3842 eh->h = NULL;
3843 eh->id_sec = NULL;
3844 }
3845
3846 return entry;
3847 }
3848
3849 /* Create an entry in the branch hash table. */
3850
3851 static struct bfd_hash_entry *
3852 branch_hash_newfunc (struct bfd_hash_entry *entry,
3853 struct bfd_hash_table *table,
3854 const char *string)
3855 {
3856 /* Allocate the structure if it has not already been allocated by a
3857 subclass. */
3858 if (entry == NULL)
3859 {
3860 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3861 if (entry == NULL)
3862 return entry;
3863 }
3864
3865 /* Call the allocation method of the superclass. */
3866 entry = bfd_hash_newfunc (entry, table, string);
3867 if (entry != NULL)
3868 {
3869 struct ppc_branch_hash_entry *eh;
3870
3871 /* Initialize the local fields. */
3872 eh = (struct ppc_branch_hash_entry *) entry;
3873 eh->offset = 0;
3874 eh->iter = 0;
3875 }
3876
3877 return entry;
3878 }
3879
3880 /* Create an entry in a ppc64 ELF linker hash table. */
3881
3882 static struct bfd_hash_entry *
3883 link_hash_newfunc (struct bfd_hash_entry *entry,
3884 struct bfd_hash_table *table,
3885 const char *string)
3886 {
3887 /* Allocate the structure if it has not already been allocated by a
3888 subclass. */
3889 if (entry == NULL)
3890 {
3891 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3892 if (entry == NULL)
3893 return entry;
3894 }
3895
3896 /* Call the allocation method of the superclass. */
3897 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3898 if (entry != NULL)
3899 {
3900 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3901
3902 memset (&eh->u.stub_cache, 0,
3903 (sizeof (struct ppc_link_hash_entry)
3904 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3905
3906 /* When making function calls, old ABI code references function entry
3907 points (dot symbols), while new ABI code references the function
3908 descriptor symbol. We need to make any combination of reference and
3909 definition work together, without breaking archive linking.
3910
3911 For a defined function "foo" and an undefined call to "bar":
3912 An old object defines "foo" and ".foo", references ".bar" (possibly
3913 "bar" too).
3914 A new object defines "foo" and references "bar".
3915
3916 A new object thus has no problem with its undefined symbols being
3917 satisfied by definitions in an old object. On the other hand, the
3918 old object won't have ".bar" satisfied by a new object.
3919
3920 Keep a list of newly added dot-symbols. */
3921
3922 if (string[0] == '.')
3923 {
3924 struct ppc_link_hash_table *htab;
3925
3926 htab = (struct ppc_link_hash_table *) table;
3927 eh->u.next_dot_sym = htab->dot_syms;
3928 htab->dot_syms = eh;
3929 }
3930 }
3931
3932 return entry;
3933 }
3934
3935 /* Create a ppc64 ELF linker hash table. */
3936
3937 static struct bfd_link_hash_table *
3938 ppc64_elf_link_hash_table_create (bfd *abfd)
3939 {
3940 struct ppc_link_hash_table *htab;
3941 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3942
3943 htab = bfd_zmalloc (amt);
3944 if (htab == NULL)
3945 return NULL;
3946
3947 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3948 sizeof (struct ppc_link_hash_entry)))
3949 {
3950 free (htab);
3951 return NULL;
3952 }
3953
3954 /* Init the stub hash table too. */
3955 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3956 sizeof (struct ppc_stub_hash_entry)))
3957 return NULL;
3958
3959 /* And the branch hash table. */
3960 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3961 sizeof (struct ppc_branch_hash_entry)))
3962 return NULL;
3963
3964 /* Initializing two fields of the union is just cosmetic. We really
3965 only care about glist, but when compiled on a 32-bit host the
3966 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3967 debugger inspection of these fields look nicer. */
3968 htab->elf.init_got_refcount.refcount = 0;
3969 htab->elf.init_got_refcount.glist = NULL;
3970 htab->elf.init_plt_refcount.refcount = 0;
3971 htab->elf.init_plt_refcount.glist = NULL;
3972 htab->elf.init_got_offset.offset = 0;
3973 htab->elf.init_got_offset.glist = NULL;
3974 htab->elf.init_plt_offset.offset = 0;
3975 htab->elf.init_plt_offset.glist = NULL;
3976
3977 return &htab->elf.root;
3978 }
3979
3980 /* Free the derived linker hash table. */
3981
3982 static void
3983 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3984 {
3985 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3986
3987 bfd_hash_table_free (&ret->stub_hash_table);
3988 bfd_hash_table_free (&ret->branch_hash_table);
3989 _bfd_generic_link_hash_table_free (hash);
3990 }
3991
3992 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3993
3994 void
3995 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3996 {
3997 struct ppc_link_hash_table *htab;
3998
3999 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4000
4001 /* Always hook our dynamic sections into the first bfd, which is the
4002 linker created stub bfd. This ensures that the GOT header is at
4003 the start of the output TOC section. */
4004 htab = ppc_hash_table (info);
4005 htab->stub_bfd = abfd;
4006 htab->elf.dynobj = abfd;
4007 }
4008
4009 /* Build a name for an entry in the stub hash table. */
4010
4011 static char *
4012 ppc_stub_name (const asection *input_section,
4013 const asection *sym_sec,
4014 const struct ppc_link_hash_entry *h,
4015 const Elf_Internal_Rela *rel)
4016 {
4017 char *stub_name;
4018 bfd_size_type len;
4019
4020 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4021 offsets from a sym as a branch target? In fact, we could
4022 probably assume the addend is always zero. */
4023 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4024
4025 if (h)
4026 {
4027 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4028 stub_name = bfd_malloc (len);
4029 if (stub_name == NULL)
4030 return stub_name;
4031
4032 sprintf (stub_name, "%08x.%s+%x",
4033 input_section->id & 0xffffffff,
4034 h->elf.root.root.string,
4035 (int) rel->r_addend & 0xffffffff);
4036 }
4037 else
4038 {
4039 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4040 stub_name = bfd_malloc (len);
4041 if (stub_name == NULL)
4042 return stub_name;
4043
4044 sprintf (stub_name, "%08x.%x:%x+%x",
4045 input_section->id & 0xffffffff,
4046 sym_sec->id & 0xffffffff,
4047 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4048 (int) rel->r_addend & 0xffffffff);
4049 }
4050 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4051 stub_name[len - 2] = 0;
4052 return stub_name;
4053 }
4054
4055 /* Look up an entry in the stub hash. Stub entries are cached because
4056 creating the stub name takes a bit of time. */
4057
4058 static struct ppc_stub_hash_entry *
4059 ppc_get_stub_entry (const asection *input_section,
4060 const asection *sym_sec,
4061 struct ppc_link_hash_entry *h,
4062 const Elf_Internal_Rela *rel,
4063 struct ppc_link_hash_table *htab)
4064 {
4065 struct ppc_stub_hash_entry *stub_entry;
4066 const asection *id_sec;
4067
4068 /* If this input section is part of a group of sections sharing one
4069 stub section, then use the id of the first section in the group.
4070 Stub names need to include a section id, as there may well be
4071 more than one stub used to reach say, printf, and we need to
4072 distinguish between them. */
4073 id_sec = htab->stub_group[input_section->id].link_sec;
4074
4075 if (h != NULL && h->u.stub_cache != NULL
4076 && h->u.stub_cache->h == h
4077 && h->u.stub_cache->id_sec == id_sec)
4078 {
4079 stub_entry = h->u.stub_cache;
4080 }
4081 else
4082 {
4083 char *stub_name;
4084
4085 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4086 if (stub_name == NULL)
4087 return NULL;
4088
4089 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4090 stub_name, FALSE, FALSE);
4091 if (h != NULL)
4092 h->u.stub_cache = stub_entry;
4093
4094 free (stub_name);
4095 }
4096
4097 return stub_entry;
4098 }
4099
4100 /* Add a new stub entry to the stub hash. Not all fields of the new
4101 stub entry are initialised. */
4102
4103 static struct ppc_stub_hash_entry *
4104 ppc_add_stub (const char *stub_name,
4105 asection *section,
4106 struct ppc_link_hash_table *htab)
4107 {
4108 asection *link_sec;
4109 asection *stub_sec;
4110 struct ppc_stub_hash_entry *stub_entry;
4111
4112 link_sec = htab->stub_group[section->id].link_sec;
4113 stub_sec = htab->stub_group[section->id].stub_sec;
4114 if (stub_sec == NULL)
4115 {
4116 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4117 if (stub_sec == NULL)
4118 {
4119 size_t namelen;
4120 bfd_size_type len;
4121 char *s_name;
4122
4123 namelen = strlen (link_sec->name);
4124 len = namelen + sizeof (STUB_SUFFIX);
4125 s_name = bfd_alloc (htab->stub_bfd, len);
4126 if (s_name == NULL)
4127 return NULL;
4128
4129 memcpy (s_name, link_sec->name, namelen);
4130 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4131 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4132 if (stub_sec == NULL)
4133 return NULL;
4134 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4135 }
4136 htab->stub_group[section->id].stub_sec = stub_sec;
4137 }
4138
4139 /* Enter this entry into the linker stub hash table. */
4140 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4141 TRUE, FALSE);
4142 if (stub_entry == NULL)
4143 {
4144 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4145 section->owner, stub_name);
4146 return NULL;
4147 }
4148
4149 stub_entry->stub_sec = stub_sec;
4150 stub_entry->stub_offset = 0;
4151 stub_entry->id_sec = link_sec;
4152 return stub_entry;
4153 }
4154
4155 /* Create sections for linker generated code. */
4156
4157 static bfd_boolean
4158 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4159 {
4160 struct ppc_link_hash_table *htab;
4161 flagword flags;
4162
4163 htab = ppc_hash_table (info);
4164
4165 /* Create .sfpr for code to save and restore fp regs. */
4166 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4167 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4168 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4169 flags);
4170 if (htab->sfpr == NULL
4171 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4172 return FALSE;
4173
4174 /* Create .glink for lazy dynamic linking support. */
4175 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4176 flags);
4177 if (htab->glink == NULL
4178 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4179 return FALSE;
4180
4181 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4182 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4183 if (htab->iplt == NULL
4184 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4185 return FALSE;
4186
4187 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4188 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4189 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4190 ".rela.iplt",
4191 flags);
4192 if (htab->reliplt == NULL
4193 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4194 return FALSE;
4195
4196 /* Create branch lookup table for plt_branch stubs. */
4197 flags = (SEC_ALLOC | SEC_LOAD
4198 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4199 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4200 flags);
4201 if (htab->brlt == NULL
4202 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4203 return FALSE;
4204
4205 if (!info->shared)
4206 return TRUE;
4207
4208 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4209 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4210 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4211 ".rela.branch_lt",
4212 flags);
4213 if (htab->relbrlt == NULL
4214 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4215 return FALSE;
4216
4217 return TRUE;
4218 }
4219
4220 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4221 not already done. */
4222
4223 static bfd_boolean
4224 create_got_section (bfd *abfd, struct bfd_link_info *info)
4225 {
4226 asection *got, *relgot;
4227 flagword flags;
4228 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4229
4230 if (!is_ppc64_elf (abfd))
4231 return FALSE;
4232
4233 if (!htab->got)
4234 {
4235 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4236 return FALSE;
4237
4238 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4239 if (!htab->got)
4240 abort ();
4241 }
4242
4243 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4244 | SEC_LINKER_CREATED);
4245
4246 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4247 if (!got
4248 || !bfd_set_section_alignment (abfd, got, 3))
4249 return FALSE;
4250
4251 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4252 flags | SEC_READONLY);
4253 if (!relgot
4254 || ! bfd_set_section_alignment (abfd, relgot, 3))
4255 return FALSE;
4256
4257 ppc64_elf_tdata (abfd)->got = got;
4258 ppc64_elf_tdata (abfd)->relgot = relgot;
4259 return TRUE;
4260 }
4261
4262 /* Create the dynamic sections, and set up shortcuts. */
4263
4264 static bfd_boolean
4265 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4266 {
4267 struct ppc_link_hash_table *htab;
4268
4269 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4270 return FALSE;
4271
4272 htab = ppc_hash_table (info);
4273 if (!htab->got)
4274 htab->got = bfd_get_section_by_name (dynobj, ".got");
4275 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4276 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4277 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4278 if (!info->shared)
4279 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4280
4281 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4282 || (!info->shared && !htab->relbss))
4283 abort ();
4284
4285 return TRUE;
4286 }
4287
4288 /* Follow indirect and warning symbol links. */
4289
4290 static inline struct bfd_link_hash_entry *
4291 follow_link (struct bfd_link_hash_entry *h)
4292 {
4293 while (h->type == bfd_link_hash_indirect
4294 || h->type == bfd_link_hash_warning)
4295 h = h->u.i.link;
4296 return h;
4297 }
4298
4299 static inline struct elf_link_hash_entry *
4300 elf_follow_link (struct elf_link_hash_entry *h)
4301 {
4302 return (struct elf_link_hash_entry *) follow_link (&h->root);
4303 }
4304
4305 static inline struct ppc_link_hash_entry *
4306 ppc_follow_link (struct ppc_link_hash_entry *h)
4307 {
4308 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4309 }
4310
4311 /* Merge PLT info on FROM with that on TO. */
4312
4313 static void
4314 move_plt_plist (struct ppc_link_hash_entry *from,
4315 struct ppc_link_hash_entry *to)
4316 {
4317 if (from->elf.plt.plist != NULL)
4318 {
4319 if (to->elf.plt.plist != NULL)
4320 {
4321 struct plt_entry **entp;
4322 struct plt_entry *ent;
4323
4324 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4325 {
4326 struct plt_entry *dent;
4327
4328 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4329 if (dent->addend == ent->addend)
4330 {
4331 dent->plt.refcount += ent->plt.refcount;
4332 *entp = ent->next;
4333 break;
4334 }
4335 if (dent == NULL)
4336 entp = &ent->next;
4337 }
4338 *entp = to->elf.plt.plist;
4339 }
4340
4341 to->elf.plt.plist = from->elf.plt.plist;
4342 from->elf.plt.plist = NULL;
4343 }
4344 }
4345
4346 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4347
4348 static void
4349 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4350 struct elf_link_hash_entry *dir,
4351 struct elf_link_hash_entry *ind)
4352 {
4353 struct ppc_link_hash_entry *edir, *eind;
4354
4355 edir = (struct ppc_link_hash_entry *) dir;
4356 eind = (struct ppc_link_hash_entry *) ind;
4357
4358 /* Copy over any dynamic relocs we may have on the indirect sym. */
4359 if (eind->dyn_relocs != NULL)
4360 {
4361 if (edir->dyn_relocs != NULL)
4362 {
4363 struct ppc_dyn_relocs **pp;
4364 struct ppc_dyn_relocs *p;
4365
4366 /* Add reloc counts against the indirect sym to the direct sym
4367 list. Merge any entries against the same section. */
4368 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4369 {
4370 struct ppc_dyn_relocs *q;
4371
4372 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4373 if (q->sec == p->sec)
4374 {
4375 q->pc_count += p->pc_count;
4376 q->count += p->count;
4377 *pp = p->next;
4378 break;
4379 }
4380 if (q == NULL)
4381 pp = &p->next;
4382 }
4383 *pp = edir->dyn_relocs;
4384 }
4385
4386 edir->dyn_relocs = eind->dyn_relocs;
4387 eind->dyn_relocs = NULL;
4388 }
4389
4390 edir->is_func |= eind->is_func;
4391 edir->is_func_descriptor |= eind->is_func_descriptor;
4392 edir->tls_mask |= eind->tls_mask;
4393 if (eind->oh != NULL)
4394 edir->oh = ppc_follow_link (eind->oh);
4395
4396 /* If called to transfer flags for a weakdef during processing
4397 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4398 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4399 if (!(ELIMINATE_COPY_RELOCS
4400 && eind->elf.root.type != bfd_link_hash_indirect
4401 && edir->elf.dynamic_adjusted))
4402 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4403
4404 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4405 edir->elf.ref_regular |= eind->elf.ref_regular;
4406 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4407 edir->elf.needs_plt |= eind->elf.needs_plt;
4408
4409 /* If we were called to copy over info for a weak sym, that's all. */
4410 if (eind->elf.root.type != bfd_link_hash_indirect)
4411 return;
4412
4413 /* Copy over got entries that we may have already seen to the
4414 symbol which just became indirect. */
4415 if (eind->elf.got.glist != NULL)
4416 {
4417 if (edir->elf.got.glist != NULL)
4418 {
4419 struct got_entry **entp;
4420 struct got_entry *ent;
4421
4422 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4423 {
4424 struct got_entry *dent;
4425
4426 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4427 if (dent->addend == ent->addend
4428 && dent->owner == ent->owner
4429 && dent->tls_type == ent->tls_type)
4430 {
4431 dent->got.refcount += ent->got.refcount;
4432 *entp = ent->next;
4433 break;
4434 }
4435 if (dent == NULL)
4436 entp = &ent->next;
4437 }
4438 *entp = edir->elf.got.glist;
4439 }
4440
4441 edir->elf.got.glist = eind->elf.got.glist;
4442 eind->elf.got.glist = NULL;
4443 }
4444
4445 /* And plt entries. */
4446 move_plt_plist (eind, edir);
4447
4448 if (eind->elf.dynindx != -1)
4449 {
4450 if (edir->elf.dynindx != -1)
4451 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4452 edir->elf.dynstr_index);
4453 edir->elf.dynindx = eind->elf.dynindx;
4454 edir->elf.dynstr_index = eind->elf.dynstr_index;
4455 eind->elf.dynindx = -1;
4456 eind->elf.dynstr_index = 0;
4457 }
4458 }
4459
4460 /* Find the function descriptor hash entry from the given function code
4461 hash entry FH. Link the entries via their OH fields. */
4462
4463 static struct ppc_link_hash_entry *
4464 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4465 {
4466 struct ppc_link_hash_entry *fdh = fh->oh;
4467
4468 if (fdh == NULL)
4469 {
4470 const char *fd_name = fh->elf.root.root.string + 1;
4471
4472 fdh = (struct ppc_link_hash_entry *)
4473 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4474 if (fdh == NULL)
4475 return fdh;
4476
4477 fdh->is_func_descriptor = 1;
4478 fdh->oh = fh;
4479 fh->is_func = 1;
4480 fh->oh = fdh;
4481 }
4482
4483 return ppc_follow_link (fdh);
4484 }
4485
4486 /* Make a fake function descriptor sym for the code sym FH. */
4487
4488 static struct ppc_link_hash_entry *
4489 make_fdh (struct bfd_link_info *info,
4490 struct ppc_link_hash_entry *fh)
4491 {
4492 bfd *abfd;
4493 asymbol *newsym;
4494 struct bfd_link_hash_entry *bh;
4495 struct ppc_link_hash_entry *fdh;
4496
4497 abfd = fh->elf.root.u.undef.abfd;
4498 newsym = bfd_make_empty_symbol (abfd);
4499 newsym->name = fh->elf.root.root.string + 1;
4500 newsym->section = bfd_und_section_ptr;
4501 newsym->value = 0;
4502 newsym->flags = BSF_WEAK;
4503
4504 bh = NULL;
4505 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4506 newsym->flags, newsym->section,
4507 newsym->value, NULL, FALSE, FALSE,
4508 &bh))
4509 return NULL;
4510
4511 fdh = (struct ppc_link_hash_entry *) bh;
4512 fdh->elf.non_elf = 0;
4513 fdh->fake = 1;
4514 fdh->is_func_descriptor = 1;
4515 fdh->oh = fh;
4516 fh->is_func = 1;
4517 fh->oh = fdh;
4518 return fdh;
4519 }
4520
4521 /* Fix function descriptor symbols defined in .opd sections to be
4522 function type. */
4523
4524 static bfd_boolean
4525 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4526 struct bfd_link_info *info,
4527 Elf_Internal_Sym *isym,
4528 const char **name ATTRIBUTE_UNUSED,
4529 flagword *flags ATTRIBUTE_UNUSED,
4530 asection **sec,
4531 bfd_vma *value ATTRIBUTE_UNUSED)
4532 {
4533 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4534 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4535 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4536 ;
4537 else if (*sec != NULL
4538 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4539 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4540
4541 return TRUE;
4542 }
4543
4544 /* This function makes an old ABI object reference to ".bar" cause the
4545 inclusion of a new ABI object archive that defines "bar".
4546 NAME is a symbol defined in an archive. Return a symbol in the hash
4547 table that might be satisfied by the archive symbols. */
4548
4549 static struct elf_link_hash_entry *
4550 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4551 struct bfd_link_info *info,
4552 const char *name)
4553 {
4554 struct elf_link_hash_entry *h;
4555 char *dot_name;
4556 size_t len;
4557
4558 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4559 if (h != NULL
4560 /* Don't return this sym if it is a fake function descriptor
4561 created by add_symbol_adjust. */
4562 && !(h->root.type == bfd_link_hash_undefweak
4563 && ((struct ppc_link_hash_entry *) h)->fake))
4564 return h;
4565
4566 if (name[0] == '.')
4567 return h;
4568
4569 len = strlen (name);
4570 dot_name = bfd_alloc (abfd, len + 2);
4571 if (dot_name == NULL)
4572 return (struct elf_link_hash_entry *) 0 - 1;
4573 dot_name[0] = '.';
4574 memcpy (dot_name + 1, name, len + 1);
4575 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4576 bfd_release (abfd, dot_name);
4577 return h;
4578 }
4579
4580 /* This function satisfies all old ABI object references to ".bar" if a
4581 new ABI object defines "bar". Well, at least, undefined dot symbols
4582 are made weak. This stops later archive searches from including an
4583 object if we already have a function descriptor definition. It also
4584 prevents the linker complaining about undefined symbols.
4585 We also check and correct mismatched symbol visibility here. The
4586 most restrictive visibility of the function descriptor and the
4587 function entry symbol is used. */
4588
4589 static bfd_boolean
4590 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4591 {
4592 struct ppc_link_hash_table *htab;
4593 struct ppc_link_hash_entry *fdh;
4594
4595 if (eh->elf.root.type == bfd_link_hash_indirect)
4596 return TRUE;
4597
4598 if (eh->elf.root.type == bfd_link_hash_warning)
4599 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4600
4601 if (eh->elf.root.root.string[0] != '.')
4602 abort ();
4603
4604 htab = ppc_hash_table (info);
4605 fdh = lookup_fdh (eh, htab);
4606 if (fdh == NULL)
4607 {
4608 if (!info->relocatable
4609 && (eh->elf.root.type == bfd_link_hash_undefined
4610 || eh->elf.root.type == bfd_link_hash_undefweak)
4611 && eh->elf.ref_regular)
4612 {
4613 /* Make an undefweak function descriptor sym, which is enough to
4614 pull in an --as-needed shared lib, but won't cause link
4615 errors. Archives are handled elsewhere. */
4616 fdh = make_fdh (info, eh);
4617 if (fdh == NULL)
4618 return FALSE;
4619 fdh->elf.ref_regular = 1;
4620 }
4621 }
4622 else
4623 {
4624 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4625 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4626 if (entry_vis < descr_vis)
4627 fdh->elf.other += entry_vis - descr_vis;
4628 else if (entry_vis > descr_vis)
4629 eh->elf.other += descr_vis - entry_vis;
4630
4631 if ((fdh->elf.root.type == bfd_link_hash_defined
4632 || fdh->elf.root.type == bfd_link_hash_defweak)
4633 && eh->elf.root.type == bfd_link_hash_undefined)
4634 {
4635 eh->elf.root.type = bfd_link_hash_undefweak;
4636 eh->was_undefined = 1;
4637 htab->twiddled_syms = 1;
4638 }
4639 }
4640
4641 return TRUE;
4642 }
4643
4644 /* Process list of dot-symbols we made in link_hash_newfunc. */
4645
4646 static bfd_boolean
4647 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4648 {
4649 struct ppc_link_hash_table *htab;
4650 struct ppc_link_hash_entry **p, *eh;
4651
4652 htab = ppc_hash_table (info);
4653 if (!is_ppc64_elf (info->output_bfd))
4654 return TRUE;
4655
4656 if (is_ppc64_elf (ibfd))
4657 {
4658 p = &htab->dot_syms;
4659 while ((eh = *p) != NULL)
4660 {
4661 *p = NULL;
4662 if (!add_symbol_adjust (eh, info))
4663 return FALSE;
4664 p = &eh->u.next_dot_sym;
4665 }
4666 }
4667
4668 /* Clear the list for non-ppc64 input files. */
4669 p = &htab->dot_syms;
4670 while ((eh = *p) != NULL)
4671 {
4672 *p = NULL;
4673 p = &eh->u.next_dot_sym;
4674 }
4675
4676 /* We need to fix the undefs list for any syms we have twiddled to
4677 undef_weak. */
4678 if (htab->twiddled_syms)
4679 {
4680 bfd_link_repair_undef_list (&htab->elf.root);
4681 htab->twiddled_syms = 0;
4682 }
4683 return TRUE;
4684 }
4685
4686 /* Undo hash table changes when an --as-needed input file is determined
4687 not to be needed. */
4688
4689 static bfd_boolean
4690 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4691 struct bfd_link_info *info)
4692 {
4693 ppc_hash_table (info)->dot_syms = NULL;
4694 return TRUE;
4695 }
4696
4697 static struct plt_entry **
4698 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4699 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4700 {
4701 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4702 struct plt_entry **local_plt;
4703 char *local_got_tls_masks;
4704
4705 if (local_got_ents == NULL)
4706 {
4707 bfd_size_type size = symtab_hdr->sh_info;
4708
4709 size *= (sizeof (*local_got_ents)
4710 + sizeof (*local_plt)
4711 + sizeof (*local_got_tls_masks));
4712 local_got_ents = bfd_zalloc (abfd, size);
4713 if (local_got_ents == NULL)
4714 return NULL;
4715 elf_local_got_ents (abfd) = local_got_ents;
4716 }
4717
4718 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4719 {
4720 struct got_entry *ent;
4721
4722 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4723 if (ent->addend == r_addend
4724 && ent->owner == abfd
4725 && ent->tls_type == tls_type)
4726 break;
4727 if (ent == NULL)
4728 {
4729 bfd_size_type amt = sizeof (*ent);
4730 ent = bfd_alloc (abfd, amt);
4731 if (ent == NULL)
4732 return FALSE;
4733 ent->next = local_got_ents[r_symndx];
4734 ent->addend = r_addend;
4735 ent->owner = abfd;
4736 ent->tls_type = tls_type;
4737 ent->got.refcount = 0;
4738 local_got_ents[r_symndx] = ent;
4739 }
4740 ent->got.refcount += 1;
4741 }
4742
4743 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4744 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
4745 local_got_tls_masks[r_symndx] |= tls_type;
4746
4747 return local_plt + r_symndx;
4748 }
4749
4750 static bfd_boolean
4751 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4752 {
4753 struct plt_entry *ent;
4754
4755 for (ent = *plist; ent != NULL; ent = ent->next)
4756 if (ent->addend == addend)
4757 break;
4758 if (ent == NULL)
4759 {
4760 bfd_size_type amt = sizeof (*ent);
4761 ent = bfd_alloc (abfd, amt);
4762 if (ent == NULL)
4763 return FALSE;
4764 ent->next = *plist;
4765 ent->addend = addend;
4766 ent->plt.refcount = 0;
4767 *plist = ent;
4768 }
4769 ent->plt.refcount += 1;
4770 return TRUE;
4771 }
4772
4773 static bfd_boolean
4774 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4775 {
4776 return (r_type == R_PPC64_REL24
4777 || r_type == R_PPC64_REL14
4778 || r_type == R_PPC64_REL14_BRTAKEN
4779 || r_type == R_PPC64_REL14_BRNTAKEN
4780 || r_type == R_PPC64_ADDR24
4781 || r_type == R_PPC64_ADDR14
4782 || r_type == R_PPC64_ADDR14_BRTAKEN
4783 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4784 }
4785
4786 /* Look through the relocs for a section during the first phase, and
4787 calculate needed space in the global offset table, procedure
4788 linkage table, and dynamic reloc sections. */
4789
4790 static bfd_boolean
4791 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4792 asection *sec, const Elf_Internal_Rela *relocs)
4793 {
4794 struct ppc_link_hash_table *htab;
4795 Elf_Internal_Shdr *symtab_hdr;
4796 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4797 const Elf_Internal_Rela *rel;
4798 const Elf_Internal_Rela *rel_end;
4799 asection *sreloc;
4800 asection **opd_sym_map;
4801 struct elf_link_hash_entry *tga, *dottga;
4802
4803 if (info->relocatable)
4804 return TRUE;
4805
4806 /* Don't do anything special with non-loaded, non-alloced sections.
4807 In particular, any relocs in such sections should not affect GOT
4808 and PLT reference counting (ie. we don't allow them to create GOT
4809 or PLT entries), there's no possibility or desire to optimize TLS
4810 relocs, and there's not much point in propagating relocs to shared
4811 libs that the dynamic linker won't relocate. */
4812 if ((sec->flags & SEC_ALLOC) == 0)
4813 return TRUE;
4814
4815 BFD_ASSERT (is_ppc64_elf (abfd));
4816
4817 htab = ppc_hash_table (info);
4818 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4819 FALSE, FALSE, TRUE);
4820 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4821 FALSE, FALSE, TRUE);
4822 symtab_hdr = &elf_symtab_hdr (abfd);
4823
4824 sym_hashes = elf_sym_hashes (abfd);
4825 sym_hashes_end = (sym_hashes
4826 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4827 - symtab_hdr->sh_info);
4828
4829 sreloc = NULL;
4830 opd_sym_map = NULL;
4831 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4832 {
4833 /* Garbage collection needs some extra help with .opd sections.
4834 We don't want to necessarily keep everything referenced by
4835 relocs in .opd, as that would keep all functions. Instead,
4836 if we reference an .opd symbol (a function descriptor), we
4837 want to keep the function code symbol's section. This is
4838 easy for global symbols, but for local syms we need to keep
4839 information about the associated function section. */
4840 bfd_size_type amt;
4841
4842 amt = sec->size * sizeof (*opd_sym_map) / 8;
4843 opd_sym_map = bfd_zalloc (abfd, amt);
4844 if (opd_sym_map == NULL)
4845 return FALSE;
4846 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4847 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4848 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4849 }
4850
4851 if (htab->sfpr == NULL
4852 && !create_linkage_sections (htab->elf.dynobj, info))
4853 return FALSE;
4854
4855 rel_end = relocs + sec->reloc_count;
4856 for (rel = relocs; rel < rel_end; rel++)
4857 {
4858 unsigned long r_symndx;
4859 struct elf_link_hash_entry *h;
4860 enum elf_ppc64_reloc_type r_type;
4861 int tls_type;
4862 struct _ppc64_elf_section_data *ppc64_sec;
4863 struct plt_entry **ifunc;
4864
4865 r_symndx = ELF64_R_SYM (rel->r_info);
4866 if (r_symndx < symtab_hdr->sh_info)
4867 h = NULL;
4868 else
4869 {
4870 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4871 h = elf_follow_link (h);
4872 }
4873
4874 tls_type = 0;
4875 ifunc = NULL;
4876 if (h != NULL)
4877 {
4878 if (h->type == STT_GNU_IFUNC)
4879 {
4880 h->needs_plt = 1;
4881 ifunc = &h->plt.plist;
4882 }
4883 }
4884 else
4885 {
4886 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4887 abfd, r_symndx);
4888 if (isym == NULL)
4889 return FALSE;
4890
4891 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4892 {
4893 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4894 rel->r_addend, PLT_IFUNC);
4895 if (ifunc == NULL)
4896 return FALSE;
4897 }
4898 }
4899 r_type = ELF64_R_TYPE (rel->r_info);
4900 if (is_branch_reloc (r_type))
4901 {
4902 if (h != NULL && (h == tga || h == dottga))
4903 {
4904 if (rel != relocs
4905 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4906 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4907 /* We have a new-style __tls_get_addr call with a marker
4908 reloc. */
4909 ;
4910 else
4911 /* Mark this section as having an old-style call. */
4912 sec->has_tls_get_addr_call = 1;
4913 }
4914
4915 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4916 if (ifunc != NULL
4917 && !update_plt_info (abfd, ifunc, rel->r_addend))
4918 return FALSE;
4919 }
4920
4921 switch (r_type)
4922 {
4923 case R_PPC64_TLSGD:
4924 case R_PPC64_TLSLD:
4925 /* These special tls relocs tie a call to __tls_get_addr with
4926 its parameter symbol. */
4927 break;
4928
4929 case R_PPC64_GOT_TLSLD16:
4930 case R_PPC64_GOT_TLSLD16_LO:
4931 case R_PPC64_GOT_TLSLD16_HI:
4932 case R_PPC64_GOT_TLSLD16_HA:
4933 tls_type = TLS_TLS | TLS_LD;
4934 goto dogottls;
4935
4936 case R_PPC64_GOT_TLSGD16:
4937 case R_PPC64_GOT_TLSGD16_LO:
4938 case R_PPC64_GOT_TLSGD16_HI:
4939 case R_PPC64_GOT_TLSGD16_HA:
4940 tls_type = TLS_TLS | TLS_GD;
4941 goto dogottls;
4942
4943 case R_PPC64_GOT_TPREL16_DS:
4944 case R_PPC64_GOT_TPREL16_LO_DS:
4945 case R_PPC64_GOT_TPREL16_HI:
4946 case R_PPC64_GOT_TPREL16_HA:
4947 if (!info->executable)
4948 info->flags |= DF_STATIC_TLS;
4949 tls_type = TLS_TLS | TLS_TPREL;
4950 goto dogottls;
4951
4952 case R_PPC64_GOT_DTPREL16_DS:
4953 case R_PPC64_GOT_DTPREL16_LO_DS:
4954 case R_PPC64_GOT_DTPREL16_HI:
4955 case R_PPC64_GOT_DTPREL16_HA:
4956 tls_type = TLS_TLS | TLS_DTPREL;
4957 dogottls:
4958 sec->has_tls_reloc = 1;
4959 /* Fall thru */
4960
4961 case R_PPC64_GOT16:
4962 case R_PPC64_GOT16_DS:
4963 case R_PPC64_GOT16_HA:
4964 case R_PPC64_GOT16_HI:
4965 case R_PPC64_GOT16_LO:
4966 case R_PPC64_GOT16_LO_DS:
4967 /* This symbol requires a global offset table entry. */
4968 sec->has_toc_reloc = 1;
4969 if (ppc64_elf_tdata (abfd)->got == NULL
4970 && !create_got_section (abfd, info))
4971 return FALSE;
4972
4973 if (h != NULL)
4974 {
4975 struct ppc_link_hash_entry *eh;
4976 struct got_entry *ent;
4977
4978 eh = (struct ppc_link_hash_entry *) h;
4979 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4980 if (ent->addend == rel->r_addend
4981 && ent->owner == abfd
4982 && ent->tls_type == tls_type)
4983 break;
4984 if (ent == NULL)
4985 {
4986 bfd_size_type amt = sizeof (*ent);
4987 ent = bfd_alloc (abfd, amt);
4988 if (ent == NULL)
4989 return FALSE;
4990 ent->next = eh->elf.got.glist;
4991 ent->addend = rel->r_addend;
4992 ent->owner = abfd;
4993 ent->tls_type = tls_type;
4994 ent->got.refcount = 0;
4995 eh->elf.got.glist = ent;
4996 }
4997 ent->got.refcount += 1;
4998 eh->tls_mask |= tls_type;
4999 }
5000 else
5001 /* This is a global offset table entry for a local symbol. */
5002 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5003 rel->r_addend, tls_type))
5004 return FALSE;
5005 break;
5006
5007 case R_PPC64_PLT16_HA:
5008 case R_PPC64_PLT16_HI:
5009 case R_PPC64_PLT16_LO:
5010 case R_PPC64_PLT32:
5011 case R_PPC64_PLT64:
5012 /* This symbol requires a procedure linkage table entry. We
5013 actually build the entry in adjust_dynamic_symbol,
5014 because this might be a case of linking PIC code without
5015 linking in any dynamic objects, in which case we don't
5016 need to generate a procedure linkage table after all. */
5017 if (h == NULL)
5018 {
5019 /* It does not make sense to have a procedure linkage
5020 table entry for a local symbol. */
5021 bfd_set_error (bfd_error_bad_value);
5022 return FALSE;
5023 }
5024 else
5025 {
5026 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5027 return FALSE;
5028 h->needs_plt = 1;
5029 if (h->root.root.string[0] == '.'
5030 && h->root.root.string[1] != '\0')
5031 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5032 }
5033 break;
5034
5035 /* The following relocations don't need to propagate the
5036 relocation if linking a shared object since they are
5037 section relative. */
5038 case R_PPC64_SECTOFF:
5039 case R_PPC64_SECTOFF_LO:
5040 case R_PPC64_SECTOFF_HI:
5041 case R_PPC64_SECTOFF_HA:
5042 case R_PPC64_SECTOFF_DS:
5043 case R_PPC64_SECTOFF_LO_DS:
5044 case R_PPC64_DTPREL16:
5045 case R_PPC64_DTPREL16_LO:
5046 case R_PPC64_DTPREL16_HI:
5047 case R_PPC64_DTPREL16_HA:
5048 case R_PPC64_DTPREL16_DS:
5049 case R_PPC64_DTPREL16_LO_DS:
5050 case R_PPC64_DTPREL16_HIGHER:
5051 case R_PPC64_DTPREL16_HIGHERA:
5052 case R_PPC64_DTPREL16_HIGHEST:
5053 case R_PPC64_DTPREL16_HIGHESTA:
5054 break;
5055
5056 /* Nor do these. */
5057 case R_PPC64_REL16:
5058 case R_PPC64_REL16_LO:
5059 case R_PPC64_REL16_HI:
5060 case R_PPC64_REL16_HA:
5061 break;
5062
5063 case R_PPC64_TOC16:
5064 case R_PPC64_TOC16_LO:
5065 case R_PPC64_TOC16_HI:
5066 case R_PPC64_TOC16_HA:
5067 case R_PPC64_TOC16_DS:
5068 case R_PPC64_TOC16_LO_DS:
5069 sec->has_toc_reloc = 1;
5070 break;
5071
5072 /* This relocation describes the C++ object vtable hierarchy.
5073 Reconstruct it for later use during GC. */
5074 case R_PPC64_GNU_VTINHERIT:
5075 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5076 return FALSE;
5077 break;
5078
5079 /* This relocation describes which C++ vtable entries are actually
5080 used. Record for later use during GC. */
5081 case R_PPC64_GNU_VTENTRY:
5082 BFD_ASSERT (h != NULL);
5083 if (h != NULL
5084 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5085 return FALSE;
5086 break;
5087
5088 case R_PPC64_REL14:
5089 case R_PPC64_REL14_BRTAKEN:
5090 case R_PPC64_REL14_BRNTAKEN:
5091 {
5092 asection *dest = NULL;
5093
5094 /* Heuristic: If jumping outside our section, chances are
5095 we are going to need a stub. */
5096 if (h != NULL)
5097 {
5098 /* If the sym is weak it may be overridden later, so
5099 don't assume we know where a weak sym lives. */
5100 if (h->root.type == bfd_link_hash_defined)
5101 dest = h->root.u.def.section;
5102 }
5103 else
5104 {
5105 Elf_Internal_Sym *isym;
5106
5107 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5108 abfd, r_symndx);
5109 if (isym == NULL)
5110 return FALSE;
5111
5112 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5113 }
5114
5115 if (dest != sec)
5116 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5117 }
5118 /* Fall through. */
5119
5120 case R_PPC64_REL24:
5121 if (h != NULL && ifunc == NULL)
5122 {
5123 /* We may need a .plt entry if the function this reloc
5124 refers to is in a shared lib. */
5125 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5126 return FALSE;
5127 h->needs_plt = 1;
5128 if (h->root.root.string[0] == '.'
5129 && h->root.root.string[1] != '\0')
5130 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5131 if (h == tga || h == dottga)
5132 sec->has_tls_reloc = 1;
5133 }
5134 break;
5135
5136 case R_PPC64_TPREL64:
5137 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5138 if (!info->executable)
5139 info->flags |= DF_STATIC_TLS;
5140 goto dotlstoc;
5141
5142 case R_PPC64_DTPMOD64:
5143 if (rel + 1 < rel_end
5144 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5145 && rel[1].r_offset == rel->r_offset + 8)
5146 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5147 else
5148 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5149 goto dotlstoc;
5150
5151 case R_PPC64_DTPREL64:
5152 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5153 if (rel != relocs
5154 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5155 && rel[-1].r_offset == rel->r_offset - 8)
5156 /* This is the second reloc of a dtpmod, dtprel pair.
5157 Don't mark with TLS_DTPREL. */
5158 goto dodyn;
5159
5160 dotlstoc:
5161 sec->has_tls_reloc = 1;
5162 if (h != NULL)
5163 {
5164 struct ppc_link_hash_entry *eh;
5165 eh = (struct ppc_link_hash_entry *) h;
5166 eh->tls_mask |= tls_type;
5167 }
5168 else
5169 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5170 rel->r_addend, tls_type))
5171 return FALSE;
5172
5173 ppc64_sec = ppc64_elf_section_data (sec);
5174 if (ppc64_sec->sec_type != sec_toc)
5175 {
5176 bfd_size_type amt;
5177
5178 /* One extra to simplify get_tls_mask. */
5179 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5180 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5181 if (ppc64_sec->u.toc.symndx == NULL)
5182 return FALSE;
5183 amt = sec->size * sizeof (bfd_vma) / 8;
5184 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5185 if (ppc64_sec->u.toc.add == NULL)
5186 return FALSE;
5187 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5188 ppc64_sec->sec_type = sec_toc;
5189 }
5190 BFD_ASSERT (rel->r_offset % 8 == 0);
5191 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5192 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5193
5194 /* Mark the second slot of a GD or LD entry.
5195 -1 to indicate GD and -2 to indicate LD. */
5196 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5197 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5198 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5199 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5200 goto dodyn;
5201
5202 case R_PPC64_TPREL16:
5203 case R_PPC64_TPREL16_LO:
5204 case R_PPC64_TPREL16_HI:
5205 case R_PPC64_TPREL16_HA:
5206 case R_PPC64_TPREL16_DS:
5207 case R_PPC64_TPREL16_LO_DS:
5208 case R_PPC64_TPREL16_HIGHER:
5209 case R_PPC64_TPREL16_HIGHERA:
5210 case R_PPC64_TPREL16_HIGHEST:
5211 case R_PPC64_TPREL16_HIGHESTA:
5212 if (info->shared)
5213 {
5214 if (!info->executable)
5215 info->flags |= DF_STATIC_TLS;
5216 goto dodyn;
5217 }
5218 break;
5219
5220 case R_PPC64_ADDR64:
5221 if (opd_sym_map != NULL
5222 && rel + 1 < rel_end
5223 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5224 {
5225 if (h != NULL)
5226 {
5227 if (h->root.root.string[0] == '.'
5228 && h->root.root.string[1] != 0
5229 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5230 ;
5231 else
5232 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5233 }
5234 else
5235 {
5236 asection *s;
5237 Elf_Internal_Sym *isym;
5238
5239 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5240 abfd, r_symndx);
5241 if (isym == NULL)
5242 return FALSE;
5243
5244 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5245 if (s != NULL && s != sec)
5246 opd_sym_map[rel->r_offset / 8] = s;
5247 }
5248 }
5249 /* Fall through. */
5250
5251 case R_PPC64_REL30:
5252 case R_PPC64_REL32:
5253 case R_PPC64_REL64:
5254 case R_PPC64_ADDR14:
5255 case R_PPC64_ADDR14_BRNTAKEN:
5256 case R_PPC64_ADDR14_BRTAKEN:
5257 case R_PPC64_ADDR16:
5258 case R_PPC64_ADDR16_DS:
5259 case R_PPC64_ADDR16_HA:
5260 case R_PPC64_ADDR16_HI:
5261 case R_PPC64_ADDR16_HIGHER:
5262 case R_PPC64_ADDR16_HIGHERA:
5263 case R_PPC64_ADDR16_HIGHEST:
5264 case R_PPC64_ADDR16_HIGHESTA:
5265 case R_PPC64_ADDR16_LO:
5266 case R_PPC64_ADDR16_LO_DS:
5267 case R_PPC64_ADDR24:
5268 case R_PPC64_ADDR32:
5269 case R_PPC64_UADDR16:
5270 case R_PPC64_UADDR32:
5271 case R_PPC64_UADDR64:
5272 case R_PPC64_TOC:
5273 if (h != NULL && !info->shared)
5274 /* We may need a copy reloc. */
5275 h->non_got_ref = 1;
5276
5277 /* Don't propagate .opd relocs. */
5278 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5279 break;
5280
5281 /* If we are creating a shared library, and this is a reloc
5282 against a global symbol, or a non PC relative reloc
5283 against a local symbol, then we need to copy the reloc
5284 into the shared library. However, if we are linking with
5285 -Bsymbolic, we do not need to copy a reloc against a
5286 global symbol which is defined in an object we are
5287 including in the link (i.e., DEF_REGULAR is set). At
5288 this point we have not seen all the input files, so it is
5289 possible that DEF_REGULAR is not set now but will be set
5290 later (it is never cleared). In case of a weak definition,
5291 DEF_REGULAR may be cleared later by a strong definition in
5292 a shared library. We account for that possibility below by
5293 storing information in the dyn_relocs field of the hash
5294 table entry. A similar situation occurs when creating
5295 shared libraries and symbol visibility changes render the
5296 symbol local.
5297
5298 If on the other hand, we are creating an executable, we
5299 may need to keep relocations for symbols satisfied by a
5300 dynamic library if we manage to avoid copy relocs for the
5301 symbol. */
5302 dodyn:
5303 if ((info->shared
5304 && (must_be_dyn_reloc (info, r_type)
5305 || (h != NULL
5306 && (! info->symbolic
5307 || h->root.type == bfd_link_hash_defweak
5308 || !h->def_regular))))
5309 || (ELIMINATE_COPY_RELOCS
5310 && !info->shared
5311 && h != NULL
5312 && (h->root.type == bfd_link_hash_defweak
5313 || !h->def_regular))
5314 || (!info->shared
5315 && ifunc != NULL))
5316 {
5317 struct ppc_dyn_relocs *p;
5318 struct ppc_dyn_relocs **head;
5319
5320 /* We must copy these reloc types into the output file.
5321 Create a reloc section in dynobj and make room for
5322 this reloc. */
5323 if (sreloc == NULL)
5324 {
5325 sreloc = _bfd_elf_make_dynamic_reloc_section
5326 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5327
5328 if (sreloc == NULL)
5329 return FALSE;
5330 }
5331
5332 /* If this is a global symbol, we count the number of
5333 relocations we need for this symbol. */
5334 if (h != NULL)
5335 {
5336 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5337 }
5338 else
5339 {
5340 /* Track dynamic relocs needed for local syms too.
5341 We really need local syms available to do this
5342 easily. Oh well. */
5343 asection *s;
5344 void *vpp;
5345 Elf_Internal_Sym *isym;
5346
5347 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5348 abfd, r_symndx);
5349 if (isym == NULL)
5350 return FALSE;
5351
5352 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5353 if (s == NULL)
5354 s = sec;
5355
5356 vpp = &elf_section_data (s)->local_dynrel;
5357 head = (struct ppc_dyn_relocs **) vpp;
5358 }
5359
5360 p = *head;
5361 if (p == NULL || p->sec != sec)
5362 {
5363 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5364 if (p == NULL)
5365 return FALSE;
5366 p->next = *head;
5367 *head = p;
5368 p->sec = sec;
5369 p->count = 0;
5370 p->pc_count = 0;
5371 }
5372
5373 p->count += 1;
5374 if (!must_be_dyn_reloc (info, r_type))
5375 p->pc_count += 1;
5376 }
5377 break;
5378
5379 default:
5380 break;
5381 }
5382 }
5383
5384 return TRUE;
5385 }
5386
5387 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5388 of the code entry point, and its section. */
5389
5390 static bfd_vma
5391 opd_entry_value (asection *opd_sec,
5392 bfd_vma offset,
5393 asection **code_sec,
5394 bfd_vma *code_off)
5395 {
5396 bfd *opd_bfd = opd_sec->owner;
5397 Elf_Internal_Rela *relocs;
5398 Elf_Internal_Rela *lo, *hi, *look;
5399 bfd_vma val;
5400
5401 /* No relocs implies we are linking a --just-symbols object. */
5402 if (opd_sec->reloc_count == 0)
5403 {
5404 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5405 return (bfd_vma) -1;
5406
5407 if (code_sec != NULL)
5408 {
5409 asection *sec, *likely = NULL;
5410 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5411 if (sec->vma <= val
5412 && (sec->flags & SEC_LOAD) != 0
5413 && (sec->flags & SEC_ALLOC) != 0)
5414 likely = sec;
5415 if (likely != NULL)
5416 {
5417 *code_sec = likely;
5418 if (code_off != NULL)
5419 *code_off = val - likely->vma;
5420 }
5421 }
5422 return val;
5423 }
5424
5425 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5426
5427 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5428 if (relocs == NULL)
5429 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5430
5431 /* Go find the opd reloc at the sym address. */
5432 lo = relocs;
5433 BFD_ASSERT (lo != NULL);
5434 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5435 val = (bfd_vma) -1;
5436 while (lo < hi)
5437 {
5438 look = lo + (hi - lo) / 2;
5439 if (look->r_offset < offset)
5440 lo = look + 1;
5441 else if (look->r_offset > offset)
5442 hi = look;
5443 else
5444 {
5445 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5446
5447 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5448 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5449 {
5450 unsigned long symndx = ELF64_R_SYM (look->r_info);
5451 asection *sec;
5452
5453 if (symndx < symtab_hdr->sh_info)
5454 {
5455 Elf_Internal_Sym *sym;
5456
5457 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5458 if (sym == NULL)
5459 {
5460 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5461 symtab_hdr->sh_info,
5462 0, NULL, NULL, NULL);
5463 if (sym == NULL)
5464 break;
5465 symtab_hdr->contents = (bfd_byte *) sym;
5466 }
5467
5468 sym += symndx;
5469 val = sym->st_value;
5470 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5471 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5472 }
5473 else
5474 {
5475 struct elf_link_hash_entry **sym_hashes;
5476 struct elf_link_hash_entry *rh;
5477
5478 sym_hashes = elf_sym_hashes (opd_bfd);
5479 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5480 rh = elf_follow_link (rh);
5481 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5482 || rh->root.type == bfd_link_hash_defweak);
5483 val = rh->root.u.def.value;
5484 sec = rh->root.u.def.section;
5485 }
5486 val += look->r_addend;
5487 if (code_off != NULL)
5488 *code_off = val;
5489 if (code_sec != NULL)
5490 *code_sec = sec;
5491 if (sec != NULL && sec->output_section != NULL)
5492 val += sec->output_section->vma + sec->output_offset;
5493 }
5494 break;
5495 }
5496 }
5497
5498 return val;
5499 }
5500
5501 /* If FDH is a function descriptor symbol, return the associated code
5502 entry symbol if it is defined. Return NULL otherwise. */
5503
5504 static struct ppc_link_hash_entry *
5505 defined_code_entry (struct ppc_link_hash_entry *fdh)
5506 {
5507 if (fdh->is_func_descriptor)
5508 {
5509 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5510 if (fh->elf.root.type == bfd_link_hash_defined
5511 || fh->elf.root.type == bfd_link_hash_defweak)
5512 return fh;
5513 }
5514 return NULL;
5515 }
5516
5517 /* If FH is a function code entry symbol, return the associated
5518 function descriptor symbol if it is defined. Return NULL otherwise. */
5519
5520 static struct ppc_link_hash_entry *
5521 defined_func_desc (struct ppc_link_hash_entry *fh)
5522 {
5523 if (fh->oh != NULL
5524 && fh->oh->is_func_descriptor)
5525 {
5526 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5527 if (fdh->elf.root.type == bfd_link_hash_defined
5528 || fdh->elf.root.type == bfd_link_hash_defweak)
5529 return fdh;
5530 }
5531 return NULL;
5532 }
5533
5534 /* Mark all our entry sym sections, both opd and code section. */
5535
5536 static void
5537 ppc64_elf_gc_keep (struct bfd_link_info *info)
5538 {
5539 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5540 struct bfd_sym_chain *sym;
5541
5542 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5543 {
5544 struct ppc_link_hash_entry *eh, *fh;
5545 asection *sec;
5546
5547 eh = (struct ppc_link_hash_entry *)
5548 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5549 if (eh == NULL)
5550 continue;
5551 if (eh->elf.root.type != bfd_link_hash_defined
5552 && eh->elf.root.type != bfd_link_hash_defweak)
5553 continue;
5554
5555 fh = defined_code_entry (eh);
5556 if (fh != NULL)
5557 {
5558 sec = fh->elf.root.u.def.section;
5559 sec->flags |= SEC_KEEP;
5560 }
5561 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5562 && opd_entry_value (eh->elf.root.u.def.section,
5563 eh->elf.root.u.def.value,
5564 &sec, NULL) != (bfd_vma) -1)
5565 sec->flags |= SEC_KEEP;
5566
5567 sec = eh->elf.root.u.def.section;
5568 sec->flags |= SEC_KEEP;
5569 }
5570 }
5571
5572 /* Mark sections containing dynamically referenced symbols. When
5573 building shared libraries, we must assume that any visible symbol is
5574 referenced. */
5575
5576 static bfd_boolean
5577 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5578 {
5579 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5580 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5581 struct ppc_link_hash_entry *fdh;
5582
5583 if (eh->elf.root.type == bfd_link_hash_warning)
5584 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5585
5586 /* Dynamic linking info is on the func descriptor sym. */
5587 fdh = defined_func_desc (eh);
5588 if (fdh != NULL)
5589 eh = fdh;
5590
5591 if ((eh->elf.root.type == bfd_link_hash_defined
5592 || eh->elf.root.type == bfd_link_hash_defweak)
5593 && (eh->elf.ref_dynamic
5594 || (!info->executable
5595 && eh->elf.def_regular
5596 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5597 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5598 {
5599 asection *code_sec;
5600 struct ppc_link_hash_entry *fh;
5601
5602 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5603
5604 /* Function descriptor syms cause the associated
5605 function code sym section to be marked. */
5606 fh = defined_code_entry (eh);
5607 if (fh != NULL)
5608 {
5609 code_sec = fh->elf.root.u.def.section;
5610 code_sec->flags |= SEC_KEEP;
5611 }
5612 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5613 && opd_entry_value (eh->elf.root.u.def.section,
5614 eh->elf.root.u.def.value,
5615 &code_sec, NULL) != (bfd_vma) -1)
5616 code_sec->flags |= SEC_KEEP;
5617 }
5618
5619 return TRUE;
5620 }
5621
5622 /* Return the section that should be marked against GC for a given
5623 relocation. */
5624
5625 static asection *
5626 ppc64_elf_gc_mark_hook (asection *sec,
5627 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5628 Elf_Internal_Rela *rel,
5629 struct elf_link_hash_entry *h,
5630 Elf_Internal_Sym *sym)
5631 {
5632 asection *rsec;
5633
5634 /* Syms return NULL if we're marking .opd, so we avoid marking all
5635 function sections, as all functions are referenced in .opd. */
5636 rsec = NULL;
5637 if (get_opd_info (sec) != NULL)
5638 return rsec;
5639
5640 if (h != NULL)
5641 {
5642 enum elf_ppc64_reloc_type r_type;
5643 struct ppc_link_hash_entry *eh, *fh, *fdh;
5644
5645 r_type = ELF64_R_TYPE (rel->r_info);
5646 switch (r_type)
5647 {
5648 case R_PPC64_GNU_VTINHERIT:
5649 case R_PPC64_GNU_VTENTRY:
5650 break;
5651
5652 default:
5653 switch (h->root.type)
5654 {
5655 case bfd_link_hash_defined:
5656 case bfd_link_hash_defweak:
5657 eh = (struct ppc_link_hash_entry *) h;
5658 fdh = defined_func_desc (eh);
5659 if (fdh != NULL)
5660 eh = fdh;
5661
5662 /* Function descriptor syms cause the associated
5663 function code sym section to be marked. */
5664 fh = defined_code_entry (eh);
5665 if (fh != NULL)
5666 {
5667 /* They also mark their opd section. */
5668 eh->elf.root.u.def.section->gc_mark = 1;
5669
5670 rsec = fh->elf.root.u.def.section;
5671 }
5672 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5673 && opd_entry_value (eh->elf.root.u.def.section,
5674 eh->elf.root.u.def.value,
5675 &rsec, NULL) != (bfd_vma) -1)
5676 eh->elf.root.u.def.section->gc_mark = 1;
5677 else
5678 rsec = h->root.u.def.section;
5679 break;
5680
5681 case bfd_link_hash_common:
5682 rsec = h->root.u.c.p->section;
5683 break;
5684
5685 default:
5686 break;
5687 }
5688 }
5689 }
5690 else
5691 {
5692 struct _opd_sec_data *opd;
5693
5694 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5695 opd = get_opd_info (rsec);
5696 if (opd != NULL && opd->func_sec != NULL)
5697 {
5698 rsec->gc_mark = 1;
5699
5700 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5701 }
5702 }
5703
5704 return rsec;
5705 }
5706
5707 /* Update the .got, .plt. and dynamic reloc reference counts for the
5708 section being removed. */
5709
5710 static bfd_boolean
5711 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5712 asection *sec, const Elf_Internal_Rela *relocs)
5713 {
5714 struct ppc_link_hash_table *htab;
5715 Elf_Internal_Shdr *symtab_hdr;
5716 struct elf_link_hash_entry **sym_hashes;
5717 struct got_entry **local_got_ents;
5718 const Elf_Internal_Rela *rel, *relend;
5719
5720 if (info->relocatable)
5721 return TRUE;
5722
5723 if ((sec->flags & SEC_ALLOC) == 0)
5724 return TRUE;
5725
5726 elf_section_data (sec)->local_dynrel = NULL;
5727
5728 htab = ppc_hash_table (info);
5729 symtab_hdr = &elf_symtab_hdr (abfd);
5730 sym_hashes = elf_sym_hashes (abfd);
5731 local_got_ents = elf_local_got_ents (abfd);
5732
5733 relend = relocs + sec->reloc_count;
5734 for (rel = relocs; rel < relend; rel++)
5735 {
5736 unsigned long r_symndx;
5737 enum elf_ppc64_reloc_type r_type;
5738 struct elf_link_hash_entry *h = NULL;
5739 char tls_type = 0;
5740
5741 r_symndx = ELF64_R_SYM (rel->r_info);
5742 r_type = ELF64_R_TYPE (rel->r_info);
5743 if (r_symndx >= symtab_hdr->sh_info)
5744 {
5745 struct ppc_link_hash_entry *eh;
5746 struct ppc_dyn_relocs **pp;
5747 struct ppc_dyn_relocs *p;
5748
5749 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5750 h = elf_follow_link (h);
5751 eh = (struct ppc_link_hash_entry *) h;
5752
5753 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5754 if (p->sec == sec)
5755 {
5756 /* Everything must go for SEC. */
5757 *pp = p->next;
5758 break;
5759 }
5760 }
5761
5762 if (is_branch_reloc (r_type))
5763 {
5764 struct plt_entry **ifunc = NULL;
5765 if (h != NULL)
5766 {
5767 if (h->type == STT_GNU_IFUNC)
5768 ifunc = &h->plt.plist;
5769 }
5770 else if (local_got_ents != NULL)
5771 {
5772 struct plt_entry **local_plt = (struct plt_entry **)
5773 (local_got_ents + symtab_hdr->sh_info);
5774 char *local_got_tls_masks = (char *)
5775 (local_plt + symtab_hdr->sh_info);
5776 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5777 ifunc = local_plt + r_symndx;
5778 }
5779 if (ifunc != NULL)
5780 {
5781 struct plt_entry *ent;
5782
5783 for (ent = *ifunc; ent != NULL; ent = ent->next)
5784 if (ent->addend == rel->r_addend)
5785 break;
5786 if (ent == NULL)
5787 abort ();
5788 if (ent->plt.refcount > 0)
5789 ent->plt.refcount -= 1;
5790 continue;
5791 }
5792 }
5793
5794 switch (r_type)
5795 {
5796 case R_PPC64_GOT_TLSLD16:
5797 case R_PPC64_GOT_TLSLD16_LO:
5798 case R_PPC64_GOT_TLSLD16_HI:
5799 case R_PPC64_GOT_TLSLD16_HA:
5800 tls_type = TLS_TLS | TLS_LD;
5801 goto dogot;
5802
5803 case R_PPC64_GOT_TLSGD16:
5804 case R_PPC64_GOT_TLSGD16_LO:
5805 case R_PPC64_GOT_TLSGD16_HI:
5806 case R_PPC64_GOT_TLSGD16_HA:
5807 tls_type = TLS_TLS | TLS_GD;
5808 goto dogot;
5809
5810 case R_PPC64_GOT_TPREL16_DS:
5811 case R_PPC64_GOT_TPREL16_LO_DS:
5812 case R_PPC64_GOT_TPREL16_HI:
5813 case R_PPC64_GOT_TPREL16_HA:
5814 tls_type = TLS_TLS | TLS_TPREL;
5815 goto dogot;
5816
5817 case R_PPC64_GOT_DTPREL16_DS:
5818 case R_PPC64_GOT_DTPREL16_LO_DS:
5819 case R_PPC64_GOT_DTPREL16_HI:
5820 case R_PPC64_GOT_DTPREL16_HA:
5821 tls_type = TLS_TLS | TLS_DTPREL;
5822 goto dogot;
5823
5824 case R_PPC64_GOT16:
5825 case R_PPC64_GOT16_DS:
5826 case R_PPC64_GOT16_HA:
5827 case R_PPC64_GOT16_HI:
5828 case R_PPC64_GOT16_LO:
5829 case R_PPC64_GOT16_LO_DS:
5830 dogot:
5831 {
5832 struct got_entry *ent;
5833
5834 if (h != NULL)
5835 ent = h->got.glist;
5836 else
5837 ent = local_got_ents[r_symndx];
5838
5839 for (; ent != NULL; ent = ent->next)
5840 if (ent->addend == rel->r_addend
5841 && ent->owner == abfd
5842 && ent->tls_type == tls_type)
5843 break;
5844 if (ent == NULL)
5845 abort ();
5846 if (ent->got.refcount > 0)
5847 ent->got.refcount -= 1;
5848 }
5849 break;
5850
5851 case R_PPC64_PLT16_HA:
5852 case R_PPC64_PLT16_HI:
5853 case R_PPC64_PLT16_LO:
5854 case R_PPC64_PLT32:
5855 case R_PPC64_PLT64:
5856 case R_PPC64_REL14:
5857 case R_PPC64_REL14_BRNTAKEN:
5858 case R_PPC64_REL14_BRTAKEN:
5859 case R_PPC64_REL24:
5860 if (h != NULL)
5861 {
5862 struct plt_entry *ent;
5863
5864 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5865 if (ent->addend == rel->r_addend)
5866 break;
5867 if (ent == NULL)
5868 abort ();
5869 if (ent->plt.refcount > 0)
5870 ent->plt.refcount -= 1;
5871 }
5872 break;
5873
5874 default:
5875 break;
5876 }
5877 }
5878 return TRUE;
5879 }
5880
5881 /* The maximum size of .sfpr. */
5882 #define SFPR_MAX (218*4)
5883
5884 struct sfpr_def_parms
5885 {
5886 const char name[12];
5887 unsigned char lo, hi;
5888 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5889 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5890 };
5891
5892 /* Auto-generate _save*, _rest* functions in .sfpr. */
5893
5894 static unsigned int
5895 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5896 {
5897 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5898 unsigned int i;
5899 size_t len = strlen (parm->name);
5900 bfd_boolean writing = FALSE;
5901 char sym[16];
5902
5903 memcpy (sym, parm->name, len);
5904 sym[len + 2] = 0;
5905
5906 for (i = parm->lo; i <= parm->hi; i++)
5907 {
5908 struct elf_link_hash_entry *h;
5909
5910 sym[len + 0] = i / 10 + '0';
5911 sym[len + 1] = i % 10 + '0';
5912 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5913 if (h != NULL
5914 && !h->def_regular)
5915 {
5916 h->root.type = bfd_link_hash_defined;
5917 h->root.u.def.section = htab->sfpr;
5918 h->root.u.def.value = htab->sfpr->size;
5919 h->type = STT_FUNC;
5920 h->def_regular = 1;
5921 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5922 writing = TRUE;
5923 if (htab->sfpr->contents == NULL)
5924 {
5925 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5926 if (htab->sfpr->contents == NULL)
5927 return FALSE;
5928 }
5929 }
5930 if (writing)
5931 {
5932 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5933 if (i != parm->hi)
5934 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5935 else
5936 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5937 htab->sfpr->size = p - htab->sfpr->contents;
5938 }
5939 }
5940
5941 return TRUE;
5942 }
5943
5944 static bfd_byte *
5945 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5946 {
5947 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5948 return p + 4;
5949 }
5950
5951 static bfd_byte *
5952 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5953 {
5954 p = savegpr0 (abfd, p, r);
5955 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5956 p = p + 4;
5957 bfd_put_32 (abfd, BLR, p);
5958 return p + 4;
5959 }
5960
5961 static bfd_byte *
5962 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5963 {
5964 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5965 return p + 4;
5966 }
5967
5968 static bfd_byte *
5969 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5970 {
5971 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5972 p = p + 4;
5973 p = restgpr0 (abfd, p, r);
5974 bfd_put_32 (abfd, MTLR_R0, p);
5975 p = p + 4;
5976 if (r == 29)
5977 {
5978 p = restgpr0 (abfd, p, 30);
5979 p = restgpr0 (abfd, p, 31);
5980 }
5981 bfd_put_32 (abfd, BLR, p);
5982 return p + 4;
5983 }
5984
5985 static bfd_byte *
5986 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5987 {
5988 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5989 return p + 4;
5990 }
5991
5992 static bfd_byte *
5993 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5994 {
5995 p = savegpr1 (abfd, p, r);
5996 bfd_put_32 (abfd, BLR, p);
5997 return p + 4;
5998 }
5999
6000 static bfd_byte *
6001 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6002 {
6003 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6004 return p + 4;
6005 }
6006
6007 static bfd_byte *
6008 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6009 {
6010 p = restgpr1 (abfd, p, r);
6011 bfd_put_32 (abfd, BLR, p);
6012 return p + 4;
6013 }
6014
6015 static bfd_byte *
6016 savefpr (bfd *abfd, bfd_byte *p, int r)
6017 {
6018 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6019 return p + 4;
6020 }
6021
6022 static bfd_byte *
6023 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6024 {
6025 p = savefpr (abfd, p, r);
6026 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6027 p = p + 4;
6028 bfd_put_32 (abfd, BLR, p);
6029 return p + 4;
6030 }
6031
6032 static bfd_byte *
6033 restfpr (bfd *abfd, bfd_byte *p, int r)
6034 {
6035 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6036 return p + 4;
6037 }
6038
6039 static bfd_byte *
6040 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6041 {
6042 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6043 p = p + 4;
6044 p = restfpr (abfd, p, r);
6045 bfd_put_32 (abfd, MTLR_R0, p);
6046 p = p + 4;
6047 if (r == 29)
6048 {
6049 p = restfpr (abfd, p, 30);
6050 p = restfpr (abfd, p, 31);
6051 }
6052 bfd_put_32 (abfd, BLR, p);
6053 return p + 4;
6054 }
6055
6056 static bfd_byte *
6057 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6058 {
6059 p = savefpr (abfd, p, r);
6060 bfd_put_32 (abfd, BLR, p);
6061 return p + 4;
6062 }
6063
6064 static bfd_byte *
6065 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6066 {
6067 p = restfpr (abfd, p, r);
6068 bfd_put_32 (abfd, BLR, p);
6069 return p + 4;
6070 }
6071
6072 static bfd_byte *
6073 savevr (bfd *abfd, bfd_byte *p, int r)
6074 {
6075 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6076 p = p + 4;
6077 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6078 return p + 4;
6079 }
6080
6081 static bfd_byte *
6082 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6083 {
6084 p = savevr (abfd, p, r);
6085 bfd_put_32 (abfd, BLR, p);
6086 return p + 4;
6087 }
6088
6089 static bfd_byte *
6090 restvr (bfd *abfd, bfd_byte *p, int r)
6091 {
6092 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6093 p = p + 4;
6094 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6095 return p + 4;
6096 }
6097
6098 static bfd_byte *
6099 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6100 {
6101 p = restvr (abfd, p, r);
6102 bfd_put_32 (abfd, BLR, p);
6103 return p + 4;
6104 }
6105
6106 /* Called via elf_link_hash_traverse to transfer dynamic linking
6107 information on function code symbol entries to their corresponding
6108 function descriptor symbol entries. */
6109
6110 static bfd_boolean
6111 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6112 {
6113 struct bfd_link_info *info;
6114 struct ppc_link_hash_table *htab;
6115 struct plt_entry *ent;
6116 struct ppc_link_hash_entry *fh;
6117 struct ppc_link_hash_entry *fdh;
6118 bfd_boolean force_local;
6119
6120 fh = (struct ppc_link_hash_entry *) h;
6121 if (fh->elf.root.type == bfd_link_hash_indirect)
6122 return TRUE;
6123
6124 if (fh->elf.root.type == bfd_link_hash_warning)
6125 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6126
6127 info = inf;
6128 htab = ppc_hash_table (info);
6129
6130 /* Resolve undefined references to dot-symbols as the value
6131 in the function descriptor, if we have one in a regular object.
6132 This is to satisfy cases like ".quad .foo". Calls to functions
6133 in dynamic objects are handled elsewhere. */
6134 if (fh->elf.root.type == bfd_link_hash_undefweak
6135 && fh->was_undefined
6136 && (fdh = defined_func_desc (fh)) != NULL
6137 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6138 && opd_entry_value (fdh->elf.root.u.def.section,
6139 fdh->elf.root.u.def.value,
6140 &fh->elf.root.u.def.section,
6141 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6142 {
6143 fh->elf.root.type = fdh->elf.root.type;
6144 fh->elf.forced_local = 1;
6145 fh->elf.def_regular = fdh->elf.def_regular;
6146 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6147 }
6148
6149 /* If this is a function code symbol, transfer dynamic linking
6150 information to the function descriptor symbol. */
6151 if (!fh->is_func)
6152 return TRUE;
6153
6154 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6155 if (ent->plt.refcount > 0)
6156 break;
6157 if (ent == NULL
6158 || fh->elf.root.root.string[0] != '.'
6159 || fh->elf.root.root.string[1] == '\0')
6160 return TRUE;
6161
6162 /* Find the corresponding function descriptor symbol. Create it
6163 as undefined if necessary. */
6164
6165 fdh = lookup_fdh (fh, htab);
6166 if (fdh == NULL
6167 && !info->executable
6168 && (fh->elf.root.type == bfd_link_hash_undefined
6169 || fh->elf.root.type == bfd_link_hash_undefweak))
6170 {
6171 fdh = make_fdh (info, fh);
6172 if (fdh == NULL)
6173 return FALSE;
6174 }
6175
6176 /* Fake function descriptors are made undefweak. If the function
6177 code symbol is strong undefined, make the fake sym the same.
6178 If the function code symbol is defined, then force the fake
6179 descriptor local; We can't support overriding of symbols in a
6180 shared library on a fake descriptor. */
6181
6182 if (fdh != NULL
6183 && fdh->fake
6184 && fdh->elf.root.type == bfd_link_hash_undefweak)
6185 {
6186 if (fh->elf.root.type == bfd_link_hash_undefined)
6187 {
6188 fdh->elf.root.type = bfd_link_hash_undefined;
6189 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6190 }
6191 else if (fh->elf.root.type == bfd_link_hash_defined
6192 || fh->elf.root.type == bfd_link_hash_defweak)
6193 {
6194 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6195 }
6196 }
6197
6198 if (fdh != NULL
6199 && !fdh->elf.forced_local
6200 && (!info->executable
6201 || fdh->elf.def_dynamic
6202 || fdh->elf.ref_dynamic
6203 || (fdh->elf.root.type == bfd_link_hash_undefweak
6204 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6205 {
6206 if (fdh->elf.dynindx == -1)
6207 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6208 return FALSE;
6209 fdh->elf.ref_regular |= fh->elf.ref_regular;
6210 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6211 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6212 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6213 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6214 {
6215 move_plt_plist (fh, fdh);
6216 fdh->elf.needs_plt = 1;
6217 }
6218 fdh->is_func_descriptor = 1;
6219 fdh->oh = fh;
6220 fh->oh = fdh;
6221 }
6222
6223 /* Now that the info is on the function descriptor, clear the
6224 function code sym info. Any function code syms for which we
6225 don't have a definition in a regular file, we force local.
6226 This prevents a shared library from exporting syms that have
6227 been imported from another library. Function code syms that
6228 are really in the library we must leave global to prevent the
6229 linker dragging in a definition from a static library. */
6230 force_local = (!fh->elf.def_regular
6231 || fdh == NULL
6232 || !fdh->elf.def_regular
6233 || fdh->elf.forced_local);
6234 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6235
6236 return TRUE;
6237 }
6238
6239 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6240 this hook to a) provide some gcc support functions, and b) transfer
6241 dynamic linking information gathered so far on function code symbol
6242 entries, to their corresponding function descriptor symbol entries. */
6243
6244 static bfd_boolean
6245 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6246 struct bfd_link_info *info)
6247 {
6248 struct ppc_link_hash_table *htab;
6249 unsigned int i;
6250 const struct sfpr_def_parms funcs[] =
6251 {
6252 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6253 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6254 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6255 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6256 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6257 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6258 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6259 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6260 { "._savef", 14, 31, savefpr, savefpr1_tail },
6261 { "._restf", 14, 31, restfpr, restfpr1_tail },
6262 { "_savevr_", 20, 31, savevr, savevr_tail },
6263 { "_restvr_", 20, 31, restvr, restvr_tail }
6264 };
6265
6266 htab = ppc_hash_table (info);
6267 if (htab->sfpr == NULL)
6268 /* We don't have any relocs. */
6269 return TRUE;
6270
6271 /* Provide any missing _save* and _rest* functions. */
6272 htab->sfpr->size = 0;
6273 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6274 if (!sfpr_define (info, &funcs[i]))
6275 return FALSE;
6276
6277 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6278
6279 if (htab->sfpr->size == 0)
6280 htab->sfpr->flags |= SEC_EXCLUDE;
6281
6282 return TRUE;
6283 }
6284
6285 /* Adjust a symbol defined by a dynamic object and referenced by a
6286 regular object. The current definition is in some section of the
6287 dynamic object, but we're not including those sections. We have to
6288 change the definition to something the rest of the link can
6289 understand. */
6290
6291 static bfd_boolean
6292 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6293 struct elf_link_hash_entry *h)
6294 {
6295 struct ppc_link_hash_table *htab;
6296 asection *s;
6297
6298 htab = ppc_hash_table (info);
6299
6300 /* Deal with function syms. */
6301 if (h->type == STT_FUNC
6302 || h->type == STT_GNU_IFUNC
6303 || h->needs_plt)
6304 {
6305 /* Clear procedure linkage table information for any symbol that
6306 won't need a .plt entry. */
6307 struct plt_entry *ent;
6308 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6309 if (ent->plt.refcount > 0)
6310 break;
6311 if (ent == NULL
6312 || (h->type != STT_GNU_IFUNC
6313 && (SYMBOL_CALLS_LOCAL (info, h)
6314 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6315 && h->root.type == bfd_link_hash_undefweak))))
6316 {
6317 h->plt.plist = NULL;
6318 h->needs_plt = 0;
6319 }
6320 }
6321 else
6322 h->plt.plist = NULL;
6323
6324 /* If this is a weak symbol, and there is a real definition, the
6325 processor independent code will have arranged for us to see the
6326 real definition first, and we can just use the same value. */
6327 if (h->u.weakdef != NULL)
6328 {
6329 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6330 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6331 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6332 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6333 if (ELIMINATE_COPY_RELOCS)
6334 h->non_got_ref = h->u.weakdef->non_got_ref;
6335 return TRUE;
6336 }
6337
6338 /* If we are creating a shared library, we must presume that the
6339 only references to the symbol are via the global offset table.
6340 For such cases we need not do anything here; the relocations will
6341 be handled correctly by relocate_section. */
6342 if (info->shared)
6343 return TRUE;
6344
6345 /* If there are no references to this symbol that do not use the
6346 GOT, we don't need to generate a copy reloc. */
6347 if (!h->non_got_ref)
6348 return TRUE;
6349
6350 /* Don't generate a copy reloc for symbols defined in the executable. */
6351 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6352 return TRUE;
6353
6354 if (ELIMINATE_COPY_RELOCS)
6355 {
6356 struct ppc_link_hash_entry * eh;
6357 struct ppc_dyn_relocs *p;
6358
6359 eh = (struct ppc_link_hash_entry *) h;
6360 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6361 {
6362 s = p->sec->output_section;
6363 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6364 break;
6365 }
6366
6367 /* If we didn't find any dynamic relocs in read-only sections, then
6368 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6369 if (p == NULL)
6370 {
6371 h->non_got_ref = 0;
6372 return TRUE;
6373 }
6374 }
6375
6376 if (h->plt.plist != NULL)
6377 {
6378 /* We should never get here, but unfortunately there are versions
6379 of gcc out there that improperly (for this ABI) put initialized
6380 function pointers, vtable refs and suchlike in read-only
6381 sections. Allow them to proceed, but warn that this might
6382 break at runtime. */
6383 (*_bfd_error_handler)
6384 (_("copy reloc against `%s' requires lazy plt linking; "
6385 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6386 h->root.root.string);
6387 }
6388
6389 /* This is a reference to a symbol defined by a dynamic object which
6390 is not a function. */
6391
6392 if (h->size == 0)
6393 {
6394 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6395 h->root.root.string);
6396 return TRUE;
6397 }
6398
6399 /* We must allocate the symbol in our .dynbss section, which will
6400 become part of the .bss section of the executable. There will be
6401 an entry for this symbol in the .dynsym section. The dynamic
6402 object will contain position independent code, so all references
6403 from the dynamic object to this symbol will go through the global
6404 offset table. The dynamic linker will use the .dynsym entry to
6405 determine the address it must put in the global offset table, so
6406 both the dynamic object and the regular object will refer to the
6407 same memory location for the variable. */
6408
6409 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6410 to copy the initial value out of the dynamic object and into the
6411 runtime process image. We need to remember the offset into the
6412 .rela.bss section we are going to use. */
6413 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6414 {
6415 htab->relbss->size += sizeof (Elf64_External_Rela);
6416 h->needs_copy = 1;
6417 }
6418
6419 s = htab->dynbss;
6420
6421 return _bfd_elf_adjust_dynamic_copy (h, s);
6422 }
6423
6424 /* If given a function descriptor symbol, hide both the function code
6425 sym and the descriptor. */
6426 static void
6427 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6428 struct elf_link_hash_entry *h,
6429 bfd_boolean force_local)
6430 {
6431 struct ppc_link_hash_entry *eh;
6432 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6433
6434 eh = (struct ppc_link_hash_entry *) h;
6435 if (eh->is_func_descriptor)
6436 {
6437 struct ppc_link_hash_entry *fh = eh->oh;
6438
6439 if (fh == NULL)
6440 {
6441 const char *p, *q;
6442 struct ppc_link_hash_table *htab;
6443 char save;
6444
6445 /* We aren't supposed to use alloca in BFD because on
6446 systems which do not have alloca the version in libiberty
6447 calls xmalloc, which might cause the program to crash
6448 when it runs out of memory. This function doesn't have a
6449 return status, so there's no way to gracefully return an
6450 error. So cheat. We know that string[-1] can be safely
6451 accessed; It's either a string in an ELF string table,
6452 or allocated in an objalloc structure. */
6453
6454 p = eh->elf.root.root.string - 1;
6455 save = *p;
6456 *(char *) p = '.';
6457 htab = ppc_hash_table (info);
6458 fh = (struct ppc_link_hash_entry *)
6459 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6460 *(char *) p = save;
6461
6462 /* Unfortunately, if it so happens that the string we were
6463 looking for was allocated immediately before this string,
6464 then we overwrote the string terminator. That's the only
6465 reason the lookup should fail. */
6466 if (fh == NULL)
6467 {
6468 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6469 while (q >= eh->elf.root.root.string && *q == *p)
6470 --q, --p;
6471 if (q < eh->elf.root.root.string && *p == '.')
6472 fh = (struct ppc_link_hash_entry *)
6473 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6474 }
6475 if (fh != NULL)
6476 {
6477 eh->oh = fh;
6478 fh->oh = eh;
6479 }
6480 }
6481 if (fh != NULL)
6482 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6483 }
6484 }
6485
6486 static bfd_boolean
6487 get_sym_h (struct elf_link_hash_entry **hp,
6488 Elf_Internal_Sym **symp,
6489 asection **symsecp,
6490 char **tls_maskp,
6491 Elf_Internal_Sym **locsymsp,
6492 unsigned long r_symndx,
6493 bfd *ibfd)
6494 {
6495 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6496
6497 if (r_symndx >= symtab_hdr->sh_info)
6498 {
6499 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6500 struct elf_link_hash_entry *h;
6501
6502 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6503 h = elf_follow_link (h);
6504
6505 if (hp != NULL)
6506 *hp = h;
6507
6508 if (symp != NULL)
6509 *symp = NULL;
6510
6511 if (symsecp != NULL)
6512 {
6513 asection *symsec = NULL;
6514 if (h->root.type == bfd_link_hash_defined
6515 || h->root.type == bfd_link_hash_defweak)
6516 symsec = h->root.u.def.section;
6517 *symsecp = symsec;
6518 }
6519
6520 if (tls_maskp != NULL)
6521 {
6522 struct ppc_link_hash_entry *eh;
6523
6524 eh = (struct ppc_link_hash_entry *) h;
6525 *tls_maskp = &eh->tls_mask;
6526 }
6527 }
6528 else
6529 {
6530 Elf_Internal_Sym *sym;
6531 Elf_Internal_Sym *locsyms = *locsymsp;
6532
6533 if (locsyms == NULL)
6534 {
6535 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6536 if (locsyms == NULL)
6537 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6538 symtab_hdr->sh_info,
6539 0, NULL, NULL, NULL);
6540 if (locsyms == NULL)
6541 return FALSE;
6542 *locsymsp = locsyms;
6543 }
6544 sym = locsyms + r_symndx;
6545
6546 if (hp != NULL)
6547 *hp = NULL;
6548
6549 if (symp != NULL)
6550 *symp = sym;
6551
6552 if (symsecp != NULL)
6553 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6554
6555 if (tls_maskp != NULL)
6556 {
6557 struct got_entry **lgot_ents;
6558 char *tls_mask;
6559
6560 tls_mask = NULL;
6561 lgot_ents = elf_local_got_ents (ibfd);
6562 if (lgot_ents != NULL)
6563 {
6564 struct plt_entry **local_plt = (struct plt_entry **)
6565 (lgot_ents + symtab_hdr->sh_info);
6566 char *lgot_masks = (char *)
6567 (local_plt + symtab_hdr->sh_info);
6568 tls_mask = &lgot_masks[r_symndx];
6569 }
6570 *tls_maskp = tls_mask;
6571 }
6572 }
6573 return TRUE;
6574 }
6575
6576 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6577 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6578 type suitable for optimization, and 1 otherwise. */
6579
6580 static int
6581 get_tls_mask (char **tls_maskp,
6582 unsigned long *toc_symndx,
6583 bfd_vma *toc_addend,
6584 Elf_Internal_Sym **locsymsp,
6585 const Elf_Internal_Rela *rel,
6586 bfd *ibfd)
6587 {
6588 unsigned long r_symndx;
6589 int next_r;
6590 struct elf_link_hash_entry *h;
6591 Elf_Internal_Sym *sym;
6592 asection *sec;
6593 bfd_vma off;
6594
6595 r_symndx = ELF64_R_SYM (rel->r_info);
6596 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6597 return 0;
6598
6599 if ((*tls_maskp != NULL && **tls_maskp != 0)
6600 || sec == NULL
6601 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6602 return 1;
6603
6604 /* Look inside a TOC section too. */
6605 if (h != NULL)
6606 {
6607 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6608 off = h->root.u.def.value;
6609 }
6610 else
6611 off = sym->st_value;
6612 off += rel->r_addend;
6613 BFD_ASSERT (off % 8 == 0);
6614 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6615 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6616 if (toc_symndx != NULL)
6617 *toc_symndx = r_symndx;
6618 if (toc_addend != NULL)
6619 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6620 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6621 return 0;
6622 if ((h == NULL
6623 || ((h->root.type == bfd_link_hash_defined
6624 || h->root.type == bfd_link_hash_defweak)
6625 && !h->def_dynamic))
6626 && (next_r == -1 || next_r == -2))
6627 return 1 - next_r;
6628 return 1;
6629 }
6630
6631 /* Adjust all global syms defined in opd sections. In gcc generated
6632 code for the old ABI, these will already have been done. */
6633
6634 static bfd_boolean
6635 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6636 {
6637 struct ppc_link_hash_entry *eh;
6638 asection *sym_sec;
6639 struct _opd_sec_data *opd;
6640
6641 if (h->root.type == bfd_link_hash_indirect)
6642 return TRUE;
6643
6644 if (h->root.type == bfd_link_hash_warning)
6645 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6646
6647 if (h->root.type != bfd_link_hash_defined
6648 && h->root.type != bfd_link_hash_defweak)
6649 return TRUE;
6650
6651 eh = (struct ppc_link_hash_entry *) h;
6652 if (eh->adjust_done)
6653 return TRUE;
6654
6655 sym_sec = eh->elf.root.u.def.section;
6656 opd = get_opd_info (sym_sec);
6657 if (opd != NULL && opd->adjust != NULL)
6658 {
6659 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6660 if (adjust == -1)
6661 {
6662 /* This entry has been deleted. */
6663 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6664 if (dsec == NULL)
6665 {
6666 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6667 if (elf_discarded_section (dsec))
6668 {
6669 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6670 break;
6671 }
6672 }
6673 eh->elf.root.u.def.value = 0;
6674 eh->elf.root.u.def.section = dsec;
6675 }
6676 else
6677 eh->elf.root.u.def.value += adjust;
6678 eh->adjust_done = 1;
6679 }
6680 return TRUE;
6681 }
6682
6683 /* Handles decrementing dynamic reloc counts for the reloc specified by
6684 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6685 have already been determined. */
6686
6687 static bfd_boolean
6688 dec_dynrel_count (bfd_vma r_info,
6689 asection *sec,
6690 struct bfd_link_info *info,
6691 Elf_Internal_Sym **local_syms,
6692 struct elf_link_hash_entry *h,
6693 asection *sym_sec)
6694 {
6695 enum elf_ppc64_reloc_type r_type;
6696 struct ppc_dyn_relocs *p;
6697 struct ppc_dyn_relocs **pp;
6698
6699 /* Can this reloc be dynamic? This switch, and later tests here
6700 should be kept in sync with the code in check_relocs. */
6701 r_type = ELF64_R_TYPE (r_info);
6702 switch (r_type)
6703 {
6704 default:
6705 return TRUE;
6706
6707 case R_PPC64_TPREL16:
6708 case R_PPC64_TPREL16_LO:
6709 case R_PPC64_TPREL16_HI:
6710 case R_PPC64_TPREL16_HA:
6711 case R_PPC64_TPREL16_DS:
6712 case R_PPC64_TPREL16_LO_DS:
6713 case R_PPC64_TPREL16_HIGHER:
6714 case R_PPC64_TPREL16_HIGHERA:
6715 case R_PPC64_TPREL16_HIGHEST:
6716 case R_PPC64_TPREL16_HIGHESTA:
6717 if (!info->shared)
6718 return TRUE;
6719
6720 case R_PPC64_TPREL64:
6721 case R_PPC64_DTPMOD64:
6722 case R_PPC64_DTPREL64:
6723 case R_PPC64_ADDR64:
6724 case R_PPC64_REL30:
6725 case R_PPC64_REL32:
6726 case R_PPC64_REL64:
6727 case R_PPC64_ADDR14:
6728 case R_PPC64_ADDR14_BRNTAKEN:
6729 case R_PPC64_ADDR14_BRTAKEN:
6730 case R_PPC64_ADDR16:
6731 case R_PPC64_ADDR16_DS:
6732 case R_PPC64_ADDR16_HA:
6733 case R_PPC64_ADDR16_HI:
6734 case R_PPC64_ADDR16_HIGHER:
6735 case R_PPC64_ADDR16_HIGHERA:
6736 case R_PPC64_ADDR16_HIGHEST:
6737 case R_PPC64_ADDR16_HIGHESTA:
6738 case R_PPC64_ADDR16_LO:
6739 case R_PPC64_ADDR16_LO_DS:
6740 case R_PPC64_ADDR24:
6741 case R_PPC64_ADDR32:
6742 case R_PPC64_UADDR16:
6743 case R_PPC64_UADDR32:
6744 case R_PPC64_UADDR64:
6745 case R_PPC64_TOC:
6746 break;
6747 }
6748
6749 if (local_syms != NULL)
6750 {
6751 unsigned long r_symndx;
6752 Elf_Internal_Sym *sym;
6753 bfd *ibfd = sec->owner;
6754
6755 r_symndx = ELF64_R_SYM (r_info);
6756 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6757 return FALSE;
6758 }
6759
6760 if ((info->shared
6761 && (must_be_dyn_reloc (info, r_type)
6762 || (h != NULL
6763 && (!info->symbolic
6764 || h->root.type == bfd_link_hash_defweak
6765 || !h->def_regular))))
6766 || (ELIMINATE_COPY_RELOCS
6767 && !info->shared
6768 && h != NULL
6769 && (h->root.type == bfd_link_hash_defweak
6770 || !h->def_regular)))
6771 ;
6772 else
6773 return TRUE;
6774
6775 if (h != NULL)
6776 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6777 else
6778 {
6779 if (sym_sec != NULL)
6780 {
6781 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6782 pp = (struct ppc_dyn_relocs **) vpp;
6783 }
6784 else
6785 {
6786 void *vpp = &elf_section_data (sec)->local_dynrel;
6787 pp = (struct ppc_dyn_relocs **) vpp;
6788 }
6789
6790 /* elf_gc_sweep may have already removed all dyn relocs associated
6791 with local syms for a given section. Don't report a dynreloc
6792 miscount. */
6793 if (*pp == NULL)
6794 return TRUE;
6795 }
6796
6797 while ((p = *pp) != NULL)
6798 {
6799 if (p->sec == sec)
6800 {
6801 if (!must_be_dyn_reloc (info, r_type))
6802 p->pc_count -= 1;
6803 p->count -= 1;
6804 if (p->count == 0)
6805 *pp = p->next;
6806 return TRUE;
6807 }
6808 pp = &p->next;
6809 }
6810
6811 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6812 sec->owner, sec);
6813 bfd_set_error (bfd_error_bad_value);
6814 return FALSE;
6815 }
6816
6817 /* Remove unused Official Procedure Descriptor entries. Currently we
6818 only remove those associated with functions in discarded link-once
6819 sections, or weakly defined functions that have been overridden. It
6820 would be possible to remove many more entries for statically linked
6821 applications. */
6822
6823 bfd_boolean
6824 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6825 bfd_boolean non_overlapping)
6826 {
6827 bfd *ibfd;
6828 bfd_boolean some_edited = FALSE;
6829 asection *need_pad = NULL;
6830
6831 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6832 {
6833 asection *sec;
6834 Elf_Internal_Rela *relstart, *rel, *relend;
6835 Elf_Internal_Shdr *symtab_hdr;
6836 Elf_Internal_Sym *local_syms;
6837 struct elf_link_hash_entry **sym_hashes;
6838 bfd_vma offset;
6839 struct _opd_sec_data *opd;
6840 bfd_boolean need_edit, add_aux_fields;
6841 bfd_size_type cnt_16b = 0;
6842
6843 sec = bfd_get_section_by_name (ibfd, ".opd");
6844 if (sec == NULL || sec->size == 0)
6845 continue;
6846
6847 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6848 continue;
6849
6850 if (sec->output_section == bfd_abs_section_ptr)
6851 continue;
6852
6853 /* Look through the section relocs. */
6854 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6855 continue;
6856
6857 local_syms = NULL;
6858 symtab_hdr = &elf_symtab_hdr (ibfd);
6859 sym_hashes = elf_sym_hashes (ibfd);
6860
6861 /* Read the relocations. */
6862 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6863 info->keep_memory);
6864 if (relstart == NULL)
6865 return FALSE;
6866
6867 /* First run through the relocs to check they are sane, and to
6868 determine whether we need to edit this opd section. */
6869 need_edit = FALSE;
6870 need_pad = sec;
6871 offset = 0;
6872 relend = relstart + sec->reloc_count;
6873 for (rel = relstart; rel < relend; )
6874 {
6875 enum elf_ppc64_reloc_type r_type;
6876 unsigned long r_symndx;
6877 asection *sym_sec;
6878 struct elf_link_hash_entry *h;
6879 Elf_Internal_Sym *sym;
6880
6881 /* .opd contains a regular array of 16 or 24 byte entries. We're
6882 only interested in the reloc pointing to a function entry
6883 point. */
6884 if (rel->r_offset != offset
6885 || rel + 1 >= relend
6886 || (rel + 1)->r_offset != offset + 8)
6887 {
6888 /* If someone messes with .opd alignment then after a
6889 "ld -r" we might have padding in the middle of .opd.
6890 Also, there's nothing to prevent someone putting
6891 something silly in .opd with the assembler. No .opd
6892 optimization for them! */
6893 broken_opd:
6894 (*_bfd_error_handler)
6895 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6896 need_edit = FALSE;
6897 break;
6898 }
6899
6900 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6901 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6902 {
6903 (*_bfd_error_handler)
6904 (_("%B: unexpected reloc type %u in .opd section"),
6905 ibfd, r_type);
6906 need_edit = FALSE;
6907 break;
6908 }
6909
6910 r_symndx = ELF64_R_SYM (rel->r_info);
6911 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6912 r_symndx, ibfd))
6913 goto error_ret;
6914
6915 if (sym_sec == NULL || sym_sec->owner == NULL)
6916 {
6917 const char *sym_name;
6918 if (h != NULL)
6919 sym_name = h->root.root.string;
6920 else
6921 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6922 sym_sec);
6923
6924 (*_bfd_error_handler)
6925 (_("%B: undefined sym `%s' in .opd section"),
6926 ibfd, sym_name);
6927 need_edit = FALSE;
6928 break;
6929 }
6930
6931 /* opd entries are always for functions defined in the
6932 current input bfd. If the symbol isn't defined in the
6933 input bfd, then we won't be using the function in this
6934 bfd; It must be defined in a linkonce section in another
6935 bfd, or is weak. It's also possible that we are
6936 discarding the function due to a linker script /DISCARD/,
6937 which we test for via the output_section. */
6938 if (sym_sec->owner != ibfd
6939 || sym_sec->output_section == bfd_abs_section_ptr)
6940 need_edit = TRUE;
6941
6942 rel += 2;
6943 if (rel == relend
6944 || (rel + 1 == relend && rel->r_offset == offset + 16))
6945 {
6946 if (sec->size == offset + 24)
6947 {
6948 need_pad = NULL;
6949 break;
6950 }
6951 if (rel == relend && sec->size == offset + 16)
6952 {
6953 cnt_16b++;
6954 break;
6955 }
6956 goto broken_opd;
6957 }
6958
6959 if (rel->r_offset == offset + 24)
6960 offset += 24;
6961 else if (rel->r_offset != offset + 16)
6962 goto broken_opd;
6963 else if (rel + 1 < relend
6964 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6965 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6966 {
6967 offset += 16;
6968 cnt_16b++;
6969 }
6970 else if (rel + 2 < relend
6971 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6972 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6973 {
6974 offset += 24;
6975 rel += 1;
6976 }
6977 else
6978 goto broken_opd;
6979 }
6980
6981 add_aux_fields = non_overlapping && cnt_16b > 0;
6982
6983 if (need_edit || add_aux_fields)
6984 {
6985 Elf_Internal_Rela *write_rel;
6986 bfd_byte *rptr, *wptr;
6987 bfd_byte *new_contents;
6988 bfd_boolean skip;
6989 long opd_ent_size;
6990 bfd_size_type amt;
6991
6992 new_contents = NULL;
6993 amt = sec->size * sizeof (long) / 8;
6994 opd = &ppc64_elf_section_data (sec)->u.opd;
6995 opd->adjust = bfd_zalloc (obfd, amt);
6996 if (opd->adjust == NULL)
6997 return FALSE;
6998 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6999
7000 /* This seems a waste of time as input .opd sections are all
7001 zeros as generated by gcc, but I suppose there's no reason
7002 this will always be so. We might start putting something in
7003 the third word of .opd entries. */
7004 if ((sec->flags & SEC_IN_MEMORY) == 0)
7005 {
7006 bfd_byte *loc;
7007 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7008 {
7009 if (loc != NULL)
7010 free (loc);
7011 error_ret:
7012 if (local_syms != NULL
7013 && symtab_hdr->contents != (unsigned char *) local_syms)
7014 free (local_syms);
7015 if (elf_section_data (sec)->relocs != relstart)
7016 free (relstart);
7017 return FALSE;
7018 }
7019 sec->contents = loc;
7020 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7021 }
7022
7023 elf_section_data (sec)->relocs = relstart;
7024
7025 new_contents = sec->contents;
7026 if (add_aux_fields)
7027 {
7028 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7029 if (new_contents == NULL)
7030 return FALSE;
7031 need_pad = FALSE;
7032 }
7033 wptr = new_contents;
7034 rptr = sec->contents;
7035
7036 write_rel = relstart;
7037 skip = FALSE;
7038 offset = 0;
7039 opd_ent_size = 0;
7040 for (rel = relstart; rel < relend; rel++)
7041 {
7042 unsigned long r_symndx;
7043 asection *sym_sec;
7044 struct elf_link_hash_entry *h;
7045 Elf_Internal_Sym *sym;
7046
7047 r_symndx = ELF64_R_SYM (rel->r_info);
7048 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7049 r_symndx, ibfd))
7050 goto error_ret;
7051
7052 if (rel->r_offset == offset)
7053 {
7054 struct ppc_link_hash_entry *fdh = NULL;
7055
7056 /* See if the .opd entry is full 24 byte or
7057 16 byte (with fd_aux entry overlapped with next
7058 fd_func). */
7059 opd_ent_size = 24;
7060 if ((rel + 2 == relend && sec->size == offset + 16)
7061 || (rel + 3 < relend
7062 && rel[2].r_offset == offset + 16
7063 && rel[3].r_offset == offset + 24
7064 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7065 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7066 opd_ent_size = 16;
7067
7068 if (h != NULL
7069 && h->root.root.string[0] == '.')
7070 {
7071 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7072 ppc_hash_table (info));
7073 if (fdh != NULL
7074 && fdh->elf.root.type != bfd_link_hash_defined
7075 && fdh->elf.root.type != bfd_link_hash_defweak)
7076 fdh = NULL;
7077 }
7078
7079 skip = (sym_sec->owner != ibfd
7080 || sym_sec->output_section == bfd_abs_section_ptr);
7081 if (skip)
7082 {
7083 if (fdh != NULL && sym_sec->owner == ibfd)
7084 {
7085 /* Arrange for the function descriptor sym
7086 to be dropped. */
7087 fdh->elf.root.u.def.value = 0;
7088 fdh->elf.root.u.def.section = sym_sec;
7089 }
7090 opd->adjust[rel->r_offset / 8] = -1;
7091 }
7092 else
7093 {
7094 /* We'll be keeping this opd entry. */
7095
7096 if (fdh != NULL)
7097 {
7098 /* Redefine the function descriptor symbol to
7099 this location in the opd section. It is
7100 necessary to update the value here rather
7101 than using an array of adjustments as we do
7102 for local symbols, because various places
7103 in the generic ELF code use the value
7104 stored in u.def.value. */
7105 fdh->elf.root.u.def.value = wptr - new_contents;
7106 fdh->adjust_done = 1;
7107 }
7108
7109 /* Local syms are a bit tricky. We could
7110 tweak them as they can be cached, but
7111 we'd need to look through the local syms
7112 for the function descriptor sym which we
7113 don't have at the moment. So keep an
7114 array of adjustments. */
7115 opd->adjust[rel->r_offset / 8]
7116 = (wptr - new_contents) - (rptr - sec->contents);
7117
7118 if (wptr != rptr)
7119 memcpy (wptr, rptr, opd_ent_size);
7120 wptr += opd_ent_size;
7121 if (add_aux_fields && opd_ent_size == 16)
7122 {
7123 memset (wptr, '\0', 8);
7124 wptr += 8;
7125 }
7126 }
7127 rptr += opd_ent_size;
7128 offset += opd_ent_size;
7129 }
7130
7131 if (skip)
7132 {
7133 if (!NO_OPD_RELOCS
7134 && !info->relocatable
7135 && !dec_dynrel_count (rel->r_info, sec, info,
7136 NULL, h, sym_sec))
7137 goto error_ret;
7138 }
7139 else
7140 {
7141 /* We need to adjust any reloc offsets to point to the
7142 new opd entries. While we're at it, we may as well
7143 remove redundant relocs. */
7144 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7145 if (write_rel != rel)
7146 memcpy (write_rel, rel, sizeof (*rel));
7147 ++write_rel;
7148 }
7149 }
7150
7151 sec->size = wptr - new_contents;
7152 sec->reloc_count = write_rel - relstart;
7153 if (add_aux_fields)
7154 {
7155 free (sec->contents);
7156 sec->contents = new_contents;
7157 }
7158
7159 /* Fudge the header size too, as this is used later in
7160 elf_bfd_final_link if we are emitting relocs. */
7161 elf_section_data (sec)->rel_hdr.sh_size
7162 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7163 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7164 some_edited = TRUE;
7165 }
7166 else if (elf_section_data (sec)->relocs != relstart)
7167 free (relstart);
7168
7169 if (local_syms != NULL
7170 && symtab_hdr->contents != (unsigned char *) local_syms)
7171 {
7172 if (!info->keep_memory)
7173 free (local_syms);
7174 else
7175 symtab_hdr->contents = (unsigned char *) local_syms;
7176 }
7177 }
7178
7179 if (some_edited)
7180 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7181
7182 /* If we are doing a final link and the last .opd entry is just 16 byte
7183 long, add a 8 byte padding after it. */
7184 if (need_pad != NULL && !info->relocatable)
7185 {
7186 bfd_byte *p;
7187
7188 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7189 {
7190 BFD_ASSERT (need_pad->size > 0);
7191
7192 p = bfd_malloc (need_pad->size + 8);
7193 if (p == NULL)
7194 return FALSE;
7195
7196 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7197 p, 0, need_pad->size))
7198 return FALSE;
7199
7200 need_pad->contents = p;
7201 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7202 }
7203 else
7204 {
7205 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7206 if (p == NULL)
7207 return FALSE;
7208
7209 need_pad->contents = p;
7210 }
7211
7212 memset (need_pad->contents + need_pad->size, 0, 8);
7213 need_pad->size += 8;
7214 }
7215
7216 return TRUE;
7217 }
7218
7219 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7220
7221 asection *
7222 ppc64_elf_tls_setup (bfd *obfd,
7223 struct bfd_link_info *info,
7224 int no_tls_get_addr_opt)
7225 {
7226 struct ppc_link_hash_table *htab;
7227
7228 htab = ppc_hash_table (info);
7229 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7230 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7231 FALSE, FALSE, TRUE));
7232 /* Move dynamic linking info to the function descriptor sym. */
7233 if (htab->tls_get_addr != NULL)
7234 func_desc_adjust (&htab->tls_get_addr->elf, info);
7235 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7236 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7237 FALSE, FALSE, TRUE));
7238 if (!no_tls_get_addr_opt)
7239 {
7240 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7241
7242 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7243 FALSE, FALSE, TRUE);
7244 if (opt != NULL)
7245 func_desc_adjust (opt, info);
7246 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7247 FALSE, FALSE, TRUE);
7248 if (opt_fd != NULL
7249 && (opt_fd->root.type == bfd_link_hash_defined
7250 || opt_fd->root.type == bfd_link_hash_defweak))
7251 {
7252 /* If glibc supports an optimized __tls_get_addr call stub,
7253 signalled by the presence of __tls_get_addr_opt, and we'll
7254 be calling __tls_get_addr via a plt call stub, then
7255 make __tls_get_addr point to __tls_get_addr_opt. */
7256 tga_fd = &htab->tls_get_addr_fd->elf;
7257 if (htab->elf.dynamic_sections_created
7258 && tga_fd != NULL
7259 && (tga_fd->type == STT_FUNC
7260 || tga_fd->needs_plt)
7261 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7262 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7263 && tga_fd->root.type == bfd_link_hash_undefweak)))
7264 {
7265 struct plt_entry *ent;
7266
7267 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7268 if (ent->plt.refcount > 0)
7269 break;
7270 if (ent != NULL)
7271 {
7272 tga_fd->root.type = bfd_link_hash_indirect;
7273 tga_fd->root.u.i.link = &opt_fd->root;
7274 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7275 if (opt_fd->dynindx != -1)
7276 {
7277 /* Use __tls_get_addr_opt in dynamic relocations. */
7278 opt_fd->dynindx = -1;
7279 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7280 opt_fd->dynstr_index);
7281 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7282 return FALSE;
7283 }
7284 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7285 tga = &htab->tls_get_addr->elf;
7286 if (opt != NULL && tga != NULL)
7287 {
7288 tga->root.type = bfd_link_hash_indirect;
7289 tga->root.u.i.link = &opt->root;
7290 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7291 _bfd_elf_link_hash_hide_symbol (info, opt,
7292 tga->forced_local);
7293 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7294 }
7295 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7296 htab->tls_get_addr_fd->is_func_descriptor = 1;
7297 if (htab->tls_get_addr != NULL)
7298 {
7299 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7300 htab->tls_get_addr->is_func = 1;
7301 }
7302 }
7303 }
7304 }
7305 else
7306 no_tls_get_addr_opt = TRUE;
7307 }
7308 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7309 return _bfd_elf_tls_setup (obfd, info);
7310 }
7311
7312 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7313 HASH1 or HASH2. */
7314
7315 static bfd_boolean
7316 branch_reloc_hash_match (const bfd *ibfd,
7317 const Elf_Internal_Rela *rel,
7318 const struct ppc_link_hash_entry *hash1,
7319 const struct ppc_link_hash_entry *hash2)
7320 {
7321 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7322 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7323 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7324
7325 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7326 {
7327 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7328 struct elf_link_hash_entry *h;
7329
7330 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7331 h = elf_follow_link (h);
7332 if (h == &hash1->elf || h == &hash2->elf)
7333 return TRUE;
7334 }
7335 return FALSE;
7336 }
7337
7338 /* Run through all the TLS relocs looking for optimization
7339 opportunities. The linker has been hacked (see ppc64elf.em) to do
7340 a preliminary section layout so that we know the TLS segment
7341 offsets. We can't optimize earlier because some optimizations need
7342 to know the tp offset, and we need to optimize before allocating
7343 dynamic relocations. */
7344
7345 bfd_boolean
7346 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7347 {
7348 bfd *ibfd;
7349 asection *sec;
7350 struct ppc_link_hash_table *htab;
7351 int pass;
7352
7353 if (info->relocatable || !info->executable)
7354 return TRUE;
7355
7356 htab = ppc_hash_table (info);
7357 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7358 {
7359 Elf_Internal_Sym *locsyms = NULL;
7360 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7361 unsigned char *toc_ref = NULL;
7362
7363 /* Look at all the sections for this file. Make two passes over
7364 the relocs. On the first pass, mark toc entries involved
7365 with tls relocs, and check that tls relocs involved in
7366 setting up a tls_get_addr call are indeed followed by such a
7367 call. If they are not, exclude them from the optimizations
7368 done on the second pass. */
7369 for (pass = 0; pass < 2; ++pass)
7370 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7371 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7372 {
7373 Elf_Internal_Rela *relstart, *rel, *relend;
7374
7375 /* Read the relocations. */
7376 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7377 info->keep_memory);
7378 if (relstart == NULL)
7379 return FALSE;
7380
7381 relend = relstart + sec->reloc_count;
7382 for (rel = relstart; rel < relend; rel++)
7383 {
7384 enum elf_ppc64_reloc_type r_type;
7385 unsigned long r_symndx;
7386 struct elf_link_hash_entry *h;
7387 Elf_Internal_Sym *sym;
7388 asection *sym_sec;
7389 char *tls_mask;
7390 char tls_set, tls_clear, tls_type = 0;
7391 bfd_vma value;
7392 bfd_boolean ok_tprel, is_local;
7393 long toc_ref_index = 0;
7394 int expecting_tls_get_addr = 0;
7395
7396 r_symndx = ELF64_R_SYM (rel->r_info);
7397 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7398 r_symndx, ibfd))
7399 {
7400 err_free_rel:
7401 if (elf_section_data (sec)->relocs != relstart)
7402 free (relstart);
7403 if (toc_ref != NULL)
7404 free (toc_ref);
7405 if (locsyms != NULL
7406 && (elf_symtab_hdr (ibfd).contents
7407 != (unsigned char *) locsyms))
7408 free (locsyms);
7409 return FALSE;
7410 }
7411
7412 if (h != NULL)
7413 {
7414 if (h->root.type != bfd_link_hash_defined
7415 && h->root.type != bfd_link_hash_defweak)
7416 continue;
7417 value = h->root.u.def.value;
7418 }
7419 else
7420 /* Symbols referenced by TLS relocs must be of type
7421 STT_TLS. So no need for .opd local sym adjust. */
7422 value = sym->st_value;
7423
7424 ok_tprel = FALSE;
7425 is_local = FALSE;
7426 if (h == NULL
7427 || !h->def_dynamic)
7428 {
7429 is_local = TRUE;
7430 value += sym_sec->output_offset;
7431 value += sym_sec->output_section->vma;
7432 value -= htab->elf.tls_sec->vma;
7433 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7434 < (bfd_vma) 1 << 32);
7435 }
7436
7437 r_type = ELF64_R_TYPE (rel->r_info);
7438 switch (r_type)
7439 {
7440 case R_PPC64_GOT_TLSLD16:
7441 case R_PPC64_GOT_TLSLD16_LO:
7442 expecting_tls_get_addr = 1;
7443 /* Fall thru */
7444
7445 case R_PPC64_GOT_TLSLD16_HI:
7446 case R_PPC64_GOT_TLSLD16_HA:
7447 /* These relocs should never be against a symbol
7448 defined in a shared lib. Leave them alone if
7449 that turns out to be the case. */
7450 if (!is_local)
7451 continue;
7452
7453 /* LD -> LE */
7454 tls_set = 0;
7455 tls_clear = TLS_LD;
7456 tls_type = TLS_TLS | TLS_LD;
7457 break;
7458
7459 case R_PPC64_GOT_TLSGD16:
7460 case R_PPC64_GOT_TLSGD16_LO:
7461 expecting_tls_get_addr = 1;
7462 /* Fall thru */
7463
7464 case R_PPC64_GOT_TLSGD16_HI:
7465 case R_PPC64_GOT_TLSGD16_HA:
7466 if (ok_tprel)
7467 /* GD -> LE */
7468 tls_set = 0;
7469 else
7470 /* GD -> IE */
7471 tls_set = TLS_TLS | TLS_TPRELGD;
7472 tls_clear = TLS_GD;
7473 tls_type = TLS_TLS | TLS_GD;
7474 break;
7475
7476 case R_PPC64_GOT_TPREL16_DS:
7477 case R_PPC64_GOT_TPREL16_LO_DS:
7478 case R_PPC64_GOT_TPREL16_HI:
7479 case R_PPC64_GOT_TPREL16_HA:
7480 if (ok_tprel)
7481 {
7482 /* IE -> LE */
7483 tls_set = 0;
7484 tls_clear = TLS_TPREL;
7485 tls_type = TLS_TLS | TLS_TPREL;
7486 break;
7487 }
7488 continue;
7489
7490 case R_PPC64_TOC16:
7491 case R_PPC64_TOC16_LO:
7492 case R_PPC64_TLS:
7493 case R_PPC64_TLSGD:
7494 case R_PPC64_TLSLD:
7495 if (sym_sec == NULL || sym_sec != toc)
7496 continue;
7497
7498 /* Mark this toc entry as referenced by a TLS
7499 code sequence. We can do that now in the
7500 case of R_PPC64_TLS, and after checking for
7501 tls_get_addr for the TOC16 relocs. */
7502 if (toc_ref == NULL)
7503 {
7504 toc_ref = bfd_zmalloc (toc->size / 8);
7505 if (toc_ref == NULL)
7506 goto err_free_rel;
7507 }
7508 if (h != NULL)
7509 value = h->root.u.def.value;
7510 else
7511 value = sym->st_value;
7512 value += rel->r_addend;
7513 BFD_ASSERT (value < toc->size && value % 8 == 0);
7514 toc_ref_index = value / 8;
7515 if (r_type == R_PPC64_TLS
7516 || r_type == R_PPC64_TLSGD
7517 || r_type == R_PPC64_TLSLD)
7518 {
7519 toc_ref[toc_ref_index] = 1;
7520 continue;
7521 }
7522
7523 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7524 continue;
7525
7526 tls_set = 0;
7527 tls_clear = 0;
7528 expecting_tls_get_addr = 2;
7529 break;
7530
7531 case R_PPC64_TPREL64:
7532 if (pass == 0
7533 || sec != toc
7534 || toc_ref == NULL
7535 || !toc_ref[rel->r_offset / 8])
7536 continue;
7537 if (ok_tprel)
7538 {
7539 /* IE -> LE */
7540 tls_set = TLS_EXPLICIT;
7541 tls_clear = TLS_TPREL;
7542 break;
7543 }
7544 continue;
7545
7546 case R_PPC64_DTPMOD64:
7547 if (pass == 0
7548 || sec != toc
7549 || toc_ref == NULL
7550 || !toc_ref[rel->r_offset / 8])
7551 continue;
7552 if (rel + 1 < relend
7553 && (rel[1].r_info
7554 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7555 && rel[1].r_offset == rel->r_offset + 8)
7556 {
7557 if (ok_tprel)
7558 /* GD -> LE */
7559 tls_set = TLS_EXPLICIT | TLS_GD;
7560 else
7561 /* GD -> IE */
7562 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7563 tls_clear = TLS_GD;
7564 }
7565 else
7566 {
7567 if (!is_local)
7568 continue;
7569
7570 /* LD -> LE */
7571 tls_set = TLS_EXPLICIT;
7572 tls_clear = TLS_LD;
7573 }
7574 break;
7575
7576 default:
7577 continue;
7578 }
7579
7580 if (pass == 0)
7581 {
7582 if (!expecting_tls_get_addr
7583 || !sec->has_tls_get_addr_call)
7584 continue;
7585
7586 if (rel + 1 < relend
7587 && branch_reloc_hash_match (ibfd, rel + 1,
7588 htab->tls_get_addr,
7589 htab->tls_get_addr_fd))
7590 {
7591 if (expecting_tls_get_addr == 2)
7592 {
7593 /* Check for toc tls entries. */
7594 char *toc_tls;
7595 int retval;
7596
7597 retval = get_tls_mask (&toc_tls, NULL, NULL,
7598 &locsyms,
7599 rel, ibfd);
7600 if (retval == 0)
7601 goto err_free_rel;
7602 if (retval > 1 && toc_tls != NULL)
7603 toc_ref[toc_ref_index] = 1;
7604 }
7605 continue;
7606 }
7607
7608 if (expecting_tls_get_addr != 1)
7609 continue;
7610
7611 /* Uh oh, we didn't find the expected call. We
7612 could just mark this symbol to exclude it
7613 from tls optimization but it's safer to skip
7614 the entire section. */
7615 sec->has_tls_reloc = 0;
7616 break;
7617 }
7618
7619 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7620 {
7621 struct plt_entry *ent;
7622 for (ent = htab->tls_get_addr->elf.plt.plist;
7623 ent != NULL;
7624 ent = ent->next)
7625 if (ent->addend == 0)
7626 {
7627 if (ent->plt.refcount > 0)
7628 {
7629 ent->plt.refcount -= 1;
7630 expecting_tls_get_addr = 0;
7631 }
7632 break;
7633 }
7634 }
7635
7636 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7637 {
7638 struct plt_entry *ent;
7639 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7640 ent != NULL;
7641 ent = ent->next)
7642 if (ent->addend == 0)
7643 {
7644 if (ent->plt.refcount > 0)
7645 ent->plt.refcount -= 1;
7646 break;
7647 }
7648 }
7649
7650 if (tls_clear == 0)
7651 continue;
7652
7653 if ((tls_set & TLS_EXPLICIT) == 0)
7654 {
7655 struct got_entry *ent;
7656
7657 /* Adjust got entry for this reloc. */
7658 if (h != NULL)
7659 ent = h->got.glist;
7660 else
7661 ent = elf_local_got_ents (ibfd)[r_symndx];
7662
7663 for (; ent != NULL; ent = ent->next)
7664 if (ent->addend == rel->r_addend
7665 && ent->owner == ibfd
7666 && ent->tls_type == tls_type)
7667 break;
7668 if (ent == NULL)
7669 abort ();
7670
7671 if (tls_set == 0)
7672 {
7673 /* We managed to get rid of a got entry. */
7674 if (ent->got.refcount > 0)
7675 ent->got.refcount -= 1;
7676 }
7677 }
7678 else
7679 {
7680 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7681 we'll lose one or two dyn relocs. */
7682 if (!dec_dynrel_count (rel->r_info, sec, info,
7683 NULL, h, sym_sec))
7684 return FALSE;
7685
7686 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7687 {
7688 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7689 NULL, h, sym_sec))
7690 return FALSE;
7691 }
7692 }
7693
7694 *tls_mask |= tls_set;
7695 *tls_mask &= ~tls_clear;
7696 }
7697
7698 if (elf_section_data (sec)->relocs != relstart)
7699 free (relstart);
7700 }
7701
7702 if (toc_ref != NULL)
7703 free (toc_ref);
7704
7705 if (locsyms != NULL
7706 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7707 {
7708 if (!info->keep_memory)
7709 free (locsyms);
7710 else
7711 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7712 }
7713 }
7714 return TRUE;
7715 }
7716
7717 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7718 the values of any global symbols in a toc section that has been
7719 edited. Globals in toc sections should be a rarity, so this function
7720 sets a flag if any are found in toc sections other than the one just
7721 edited, so that futher hash table traversals can be avoided. */
7722
7723 struct adjust_toc_info
7724 {
7725 asection *toc;
7726 unsigned long *skip;
7727 bfd_boolean global_toc_syms;
7728 };
7729
7730 static bfd_boolean
7731 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7732 {
7733 struct ppc_link_hash_entry *eh;
7734 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7735
7736 if (h->root.type == bfd_link_hash_indirect)
7737 return TRUE;
7738
7739 if (h->root.type == bfd_link_hash_warning)
7740 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7741
7742 if (h->root.type != bfd_link_hash_defined
7743 && h->root.type != bfd_link_hash_defweak)
7744 return TRUE;
7745
7746 eh = (struct ppc_link_hash_entry *) h;
7747 if (eh->adjust_done)
7748 return TRUE;
7749
7750 if (eh->elf.root.u.def.section == toc_inf->toc)
7751 {
7752 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7753 if (skip != (unsigned long) -1)
7754 eh->elf.root.u.def.value -= skip;
7755 else
7756 {
7757 (*_bfd_error_handler)
7758 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7759 eh->elf.root.u.def.section = &bfd_abs_section;
7760 eh->elf.root.u.def.value = 0;
7761 }
7762 eh->adjust_done = 1;
7763 }
7764 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7765 toc_inf->global_toc_syms = TRUE;
7766
7767 return TRUE;
7768 }
7769
7770 /* Examine all relocs referencing .toc sections in order to remove
7771 unused .toc entries. */
7772
7773 bfd_boolean
7774 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7775 {
7776 bfd *ibfd;
7777 struct adjust_toc_info toc_inf;
7778
7779 toc_inf.global_toc_syms = TRUE;
7780 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7781 {
7782 asection *toc, *sec;
7783 Elf_Internal_Shdr *symtab_hdr;
7784 Elf_Internal_Sym *local_syms;
7785 struct elf_link_hash_entry **sym_hashes;
7786 Elf_Internal_Rela *relstart, *rel;
7787 unsigned long *skip, *drop;
7788 unsigned char *used;
7789 unsigned char *keep, last, some_unused;
7790
7791 toc = bfd_get_section_by_name (ibfd, ".toc");
7792 if (toc == NULL
7793 || toc->size == 0
7794 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7795 || elf_discarded_section (toc))
7796 continue;
7797
7798 local_syms = NULL;
7799 symtab_hdr = &elf_symtab_hdr (ibfd);
7800 sym_hashes = elf_sym_hashes (ibfd);
7801
7802 /* Look at sections dropped from the final link. */
7803 skip = NULL;
7804 relstart = NULL;
7805 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7806 {
7807 if (sec->reloc_count == 0
7808 || !elf_discarded_section (sec)
7809 || get_opd_info (sec)
7810 || (sec->flags & SEC_ALLOC) == 0
7811 || (sec->flags & SEC_DEBUGGING) != 0)
7812 continue;
7813
7814 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7815 if (relstart == NULL)
7816 goto error_ret;
7817
7818 /* Run through the relocs to see which toc entries might be
7819 unused. */
7820 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7821 {
7822 enum elf_ppc64_reloc_type r_type;
7823 unsigned long r_symndx;
7824 asection *sym_sec;
7825 struct elf_link_hash_entry *h;
7826 Elf_Internal_Sym *sym;
7827 bfd_vma val;
7828
7829 r_type = ELF64_R_TYPE (rel->r_info);
7830 switch (r_type)
7831 {
7832 default:
7833 continue;
7834
7835 case R_PPC64_TOC16:
7836 case R_PPC64_TOC16_LO:
7837 case R_PPC64_TOC16_HI:
7838 case R_PPC64_TOC16_HA:
7839 case R_PPC64_TOC16_DS:
7840 case R_PPC64_TOC16_LO_DS:
7841 break;
7842 }
7843
7844 r_symndx = ELF64_R_SYM (rel->r_info);
7845 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7846 r_symndx, ibfd))
7847 goto error_ret;
7848
7849 if (sym_sec != toc)
7850 continue;
7851
7852 if (h != NULL)
7853 val = h->root.u.def.value;
7854 else
7855 val = sym->st_value;
7856 val += rel->r_addend;
7857
7858 if (val >= toc->size)
7859 continue;
7860
7861 /* Anything in the toc ought to be aligned to 8 bytes.
7862 If not, don't mark as unused. */
7863 if (val & 7)
7864 continue;
7865
7866 if (skip == NULL)
7867 {
7868 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7869 if (skip == NULL)
7870 goto error_ret;
7871 }
7872
7873 skip[val >> 3] = 1;
7874 }
7875
7876 if (elf_section_data (sec)->relocs != relstart)
7877 free (relstart);
7878 }
7879
7880 if (skip == NULL)
7881 continue;
7882
7883 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7884 if (used == NULL)
7885 {
7886 error_ret:
7887 if (local_syms != NULL
7888 && symtab_hdr->contents != (unsigned char *) local_syms)
7889 free (local_syms);
7890 if (sec != NULL
7891 && relstart != NULL
7892 && elf_section_data (sec)->relocs != relstart)
7893 free (relstart);
7894 if (skip != NULL)
7895 free (skip);
7896 return FALSE;
7897 }
7898
7899 /* Now check all kept sections that might reference the toc.
7900 Check the toc itself last. */
7901 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7902 : ibfd->sections);
7903 sec != NULL;
7904 sec = (sec == toc ? NULL
7905 : sec->next == NULL ? toc
7906 : sec->next == toc && toc->next ? toc->next
7907 : sec->next))
7908 {
7909 int repeat;
7910
7911 if (sec->reloc_count == 0
7912 || elf_discarded_section (sec)
7913 || get_opd_info (sec)
7914 || (sec->flags & SEC_ALLOC) == 0
7915 || (sec->flags & SEC_DEBUGGING) != 0)
7916 continue;
7917
7918 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7919 if (relstart == NULL)
7920 goto error_ret;
7921
7922 /* Mark toc entries referenced as used. */
7923 repeat = 0;
7924 do
7925 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7926 {
7927 enum elf_ppc64_reloc_type r_type;
7928 unsigned long r_symndx;
7929 asection *sym_sec;
7930 struct elf_link_hash_entry *h;
7931 Elf_Internal_Sym *sym;
7932 bfd_vma val;
7933
7934 r_type = ELF64_R_TYPE (rel->r_info);
7935 switch (r_type)
7936 {
7937 case R_PPC64_TOC16:
7938 case R_PPC64_TOC16_LO:
7939 case R_PPC64_TOC16_HI:
7940 case R_PPC64_TOC16_HA:
7941 case R_PPC64_TOC16_DS:
7942 case R_PPC64_TOC16_LO_DS:
7943 /* In case we're taking addresses of toc entries. */
7944 case R_PPC64_ADDR64:
7945 break;
7946
7947 default:
7948 continue;
7949 }
7950
7951 r_symndx = ELF64_R_SYM (rel->r_info);
7952 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7953 r_symndx, ibfd))
7954 {
7955 free (used);
7956 goto error_ret;
7957 }
7958
7959 if (sym_sec != toc)
7960 continue;
7961
7962 if (h != NULL)
7963 val = h->root.u.def.value;
7964 else
7965 val = sym->st_value;
7966 val += rel->r_addend;
7967
7968 if (val >= toc->size)
7969 continue;
7970
7971 /* For the toc section, we only mark as used if
7972 this entry itself isn't unused. */
7973 if (sec == toc
7974 && !used[val >> 3]
7975 && (used[rel->r_offset >> 3]
7976 || !skip[rel->r_offset >> 3]))
7977 /* Do all the relocs again, to catch reference
7978 chains. */
7979 repeat = 1;
7980
7981 used[val >> 3] = 1;
7982 }
7983 while (repeat);
7984 }
7985
7986 /* Merge the used and skip arrays. Assume that TOC
7987 doublewords not appearing as either used or unused belong
7988 to to an entry more than one doubleword in size. */
7989 for (drop = skip, keep = used, last = 0, some_unused = 0;
7990 drop < skip + (toc->size + 7) / 8;
7991 ++drop, ++keep)
7992 {
7993 if (*keep)
7994 {
7995 *drop = 0;
7996 last = 0;
7997 }
7998 else if (*drop)
7999 {
8000 some_unused = 1;
8001 last = 1;
8002 }
8003 else
8004 *drop = last;
8005 }
8006
8007 free (used);
8008
8009 if (some_unused)
8010 {
8011 bfd_byte *contents, *src;
8012 unsigned long off;
8013
8014 /* Shuffle the toc contents, and at the same time convert the
8015 skip array from booleans into offsets. */
8016 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8017 goto error_ret;
8018
8019 elf_section_data (toc)->this_hdr.contents = contents;
8020
8021 for (src = contents, off = 0, drop = skip;
8022 src < contents + toc->size;
8023 src += 8, ++drop)
8024 {
8025 if (*drop)
8026 {
8027 *drop = (unsigned long) -1;
8028 off += 8;
8029 }
8030 else if (off != 0)
8031 {
8032 *drop = off;
8033 memcpy (src - off, src, 8);
8034 }
8035 }
8036 toc->rawsize = toc->size;
8037 toc->size = src - contents - off;
8038
8039 if (toc->reloc_count != 0)
8040 {
8041 Elf_Internal_Rela *wrel;
8042 bfd_size_type sz;
8043
8044 /* Read toc relocs. */
8045 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8046 TRUE);
8047 if (relstart == NULL)
8048 goto error_ret;
8049
8050 /* Remove unused toc relocs, and adjust those we keep. */
8051 wrel = relstart;
8052 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8053 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8054 {
8055 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8056 wrel->r_info = rel->r_info;
8057 wrel->r_addend = rel->r_addend;
8058 ++wrel;
8059 }
8060 else if (!dec_dynrel_count (rel->r_info, toc, info,
8061 &local_syms, NULL, NULL))
8062 goto error_ret;
8063
8064 toc->reloc_count = wrel - relstart;
8065 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8066 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8067 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8068 }
8069
8070 /* Adjust addends for relocs against the toc section sym. */
8071 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8072 {
8073 if (sec->reloc_count == 0
8074 || elf_discarded_section (sec))
8075 continue;
8076
8077 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8078 TRUE);
8079 if (relstart == NULL)
8080 goto error_ret;
8081
8082 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8083 {
8084 enum elf_ppc64_reloc_type r_type;
8085 unsigned long r_symndx;
8086 asection *sym_sec;
8087 struct elf_link_hash_entry *h;
8088 Elf_Internal_Sym *sym;
8089
8090 r_type = ELF64_R_TYPE (rel->r_info);
8091 switch (r_type)
8092 {
8093 default:
8094 continue;
8095
8096 case R_PPC64_TOC16:
8097 case R_PPC64_TOC16_LO:
8098 case R_PPC64_TOC16_HI:
8099 case R_PPC64_TOC16_HA:
8100 case R_PPC64_TOC16_DS:
8101 case R_PPC64_TOC16_LO_DS:
8102 case R_PPC64_ADDR64:
8103 break;
8104 }
8105
8106 r_symndx = ELF64_R_SYM (rel->r_info);
8107 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8108 r_symndx, ibfd))
8109 goto error_ret;
8110
8111 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8112 continue;
8113
8114 rel->r_addend -= skip[rel->r_addend >> 3];
8115 }
8116 }
8117
8118 /* We shouldn't have local or global symbols defined in the TOC,
8119 but handle them anyway. */
8120 if (local_syms != NULL)
8121 {
8122 Elf_Internal_Sym *sym;
8123
8124 for (sym = local_syms;
8125 sym < local_syms + symtab_hdr->sh_info;
8126 ++sym)
8127 if (sym->st_value != 0
8128 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8129 {
8130 if (skip[sym->st_value >> 3] != (unsigned long) -1)
8131 sym->st_value -= skip[sym->st_value >> 3];
8132 else
8133 {
8134 (*_bfd_error_handler)
8135 (_("%s defined in removed toc entry"),
8136 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8137 NULL));
8138 sym->st_value = 0;
8139 sym->st_shndx = SHN_ABS;
8140 }
8141 symtab_hdr->contents = (unsigned char *) local_syms;
8142 }
8143 }
8144
8145 /* Finally, adjust any global syms defined in the toc. */
8146 if (toc_inf.global_toc_syms)
8147 {
8148 toc_inf.toc = toc;
8149 toc_inf.skip = skip;
8150 toc_inf.global_toc_syms = FALSE;
8151 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8152 &toc_inf);
8153 }
8154 }
8155
8156 if (local_syms != NULL
8157 && symtab_hdr->contents != (unsigned char *) local_syms)
8158 {
8159 if (!info->keep_memory)
8160 free (local_syms);
8161 else
8162 symtab_hdr->contents = (unsigned char *) local_syms;
8163 }
8164 free (skip);
8165 }
8166
8167 return TRUE;
8168 }
8169
8170 /* Allocate space in .plt, .got and associated reloc sections for
8171 dynamic relocs. */
8172
8173 static bfd_boolean
8174 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8175 {
8176 struct bfd_link_info *info;
8177 struct ppc_link_hash_table *htab;
8178 asection *s;
8179 struct ppc_link_hash_entry *eh;
8180 struct ppc_dyn_relocs *p;
8181 struct got_entry *gent;
8182
8183 if (h->root.type == bfd_link_hash_indirect)
8184 return TRUE;
8185
8186 if (h->root.type == bfd_link_hash_warning)
8187 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8188
8189 info = (struct bfd_link_info *) inf;
8190 htab = ppc_hash_table (info);
8191
8192 if ((htab->elf.dynamic_sections_created
8193 && h->dynindx != -1
8194 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8195 || h->type == STT_GNU_IFUNC)
8196 {
8197 struct plt_entry *pent;
8198 bfd_boolean doneone = FALSE;
8199 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8200 if (pent->plt.refcount > 0)
8201 {
8202 if (!htab->elf.dynamic_sections_created
8203 || h->dynindx == -1)
8204 {
8205 s = htab->iplt;
8206 pent->plt.offset = s->size;
8207 s->size += PLT_ENTRY_SIZE;
8208 s = htab->reliplt;
8209 }
8210 else
8211 {
8212 /* If this is the first .plt entry, make room for the special
8213 first entry. */
8214 s = htab->plt;
8215 if (s->size == 0)
8216 s->size += PLT_INITIAL_ENTRY_SIZE;
8217
8218 pent->plt.offset = s->size;
8219
8220 /* Make room for this entry. */
8221 s->size += PLT_ENTRY_SIZE;
8222
8223 /* Make room for the .glink code. */
8224 s = htab->glink;
8225 if (s->size == 0)
8226 s->size += GLINK_CALL_STUB_SIZE;
8227 /* We need bigger stubs past index 32767. */
8228 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8229 s->size += 4;
8230 s->size += 2*4;
8231
8232 /* We also need to make an entry in the .rela.plt section. */
8233 s = htab->relplt;
8234 }
8235 s->size += sizeof (Elf64_External_Rela);
8236 doneone = TRUE;
8237 }
8238 else
8239 pent->plt.offset = (bfd_vma) -1;
8240 if (!doneone)
8241 {
8242 h->plt.plist = NULL;
8243 h->needs_plt = 0;
8244 }
8245 }
8246 else
8247 {
8248 h->plt.plist = NULL;
8249 h->needs_plt = 0;
8250 }
8251
8252 eh = (struct ppc_link_hash_entry *) h;
8253 /* Run through the TLS GD got entries first if we're changing them
8254 to TPREL. */
8255 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8256 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8257 if (gent->got.refcount > 0
8258 && (gent->tls_type & TLS_GD) != 0)
8259 {
8260 /* This was a GD entry that has been converted to TPREL. If
8261 there happens to be a TPREL entry we can use that one. */
8262 struct got_entry *ent;
8263 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8264 if (ent->got.refcount > 0
8265 && (ent->tls_type & TLS_TPREL) != 0
8266 && ent->addend == gent->addend
8267 && ent->owner == gent->owner)
8268 {
8269 gent->got.refcount = 0;
8270 break;
8271 }
8272
8273 /* If not, then we'll be using our own TPREL entry. */
8274 if (gent->got.refcount != 0)
8275 gent->tls_type = TLS_TLS | TLS_TPREL;
8276 }
8277
8278 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8279 if (gent->got.refcount > 0)
8280 {
8281 bfd_boolean dyn;
8282 asection *rsec;
8283
8284 /* Make sure this symbol is output as a dynamic symbol.
8285 Undefined weak syms won't yet be marked as dynamic,
8286 nor will all TLS symbols. */
8287 if (h->dynindx == -1
8288 && !h->forced_local
8289 && h->type != STT_GNU_IFUNC
8290 && htab->elf.dynamic_sections_created)
8291 {
8292 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8293 return FALSE;
8294 }
8295
8296 if ((gent->tls_type & TLS_LD) != 0
8297 && !h->def_dynamic)
8298 {
8299 ppc64_tlsld_got (gent->owner)->refcount += 1;
8300 gent->got.offset = (bfd_vma) -1;
8301 continue;
8302 }
8303
8304 if (!is_ppc64_elf (gent->owner))
8305 continue;
8306
8307 s = ppc64_elf_tdata (gent->owner)->got;
8308 gent->got.offset = s->size;
8309 s->size
8310 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
8311 dyn = htab->elf.dynamic_sections_created;
8312 rsec = NULL;
8313 if ((info->shared
8314 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8315 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8316 || h->root.type != bfd_link_hash_undefweak))
8317 rsec = ppc64_elf_tdata (gent->owner)->relgot;
8318 else if (h->type == STT_GNU_IFUNC)
8319 rsec = htab->reliplt;
8320 if (rsec != NULL)
8321 rsec->size += (gent->tls_type & eh->tls_mask & TLS_GD
8322 ? 2 * sizeof (Elf64_External_Rela)
8323 : sizeof (Elf64_External_Rela));
8324 }
8325 else
8326 gent->got.offset = (bfd_vma) -1;
8327
8328 if (eh->dyn_relocs == NULL
8329 || (!htab->elf.dynamic_sections_created
8330 && h->type != STT_GNU_IFUNC))
8331 return TRUE;
8332
8333 /* In the shared -Bsymbolic case, discard space allocated for
8334 dynamic pc-relative relocs against symbols which turn out to be
8335 defined in regular objects. For the normal shared case, discard
8336 space for relocs that have become local due to symbol visibility
8337 changes. */
8338
8339 if (info->shared)
8340 {
8341 /* Relocs that use pc_count are those that appear on a call insn,
8342 or certain REL relocs (see must_be_dyn_reloc) that can be
8343 generated via assembly. We want calls to protected symbols to
8344 resolve directly to the function rather than going via the plt.
8345 If people want function pointer comparisons to work as expected
8346 then they should avoid writing weird assembly. */
8347 if (SYMBOL_CALLS_LOCAL (info, h))
8348 {
8349 struct ppc_dyn_relocs **pp;
8350
8351 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8352 {
8353 p->count -= p->pc_count;
8354 p->pc_count = 0;
8355 if (p->count == 0)
8356 *pp = p->next;
8357 else
8358 pp = &p->next;
8359 }
8360 }
8361
8362 /* Also discard relocs on undefined weak syms with non-default
8363 visibility. */
8364 if (eh->dyn_relocs != NULL
8365 && h->root.type == bfd_link_hash_undefweak)
8366 {
8367 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8368 eh->dyn_relocs = NULL;
8369
8370 /* Make sure this symbol is output as a dynamic symbol.
8371 Undefined weak syms won't yet be marked as dynamic. */
8372 else if (h->dynindx == -1
8373 && !h->forced_local)
8374 {
8375 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8376 return FALSE;
8377 }
8378 }
8379 }
8380 else if (h->type == STT_GNU_IFUNC)
8381 {
8382 if (!h->non_got_ref)
8383 eh->dyn_relocs = NULL;
8384 }
8385 else if (ELIMINATE_COPY_RELOCS)
8386 {
8387 /* For the non-shared case, discard space for relocs against
8388 symbols which turn out to need copy relocs or are not
8389 dynamic. */
8390
8391 if (!h->non_got_ref
8392 && !h->def_regular)
8393 {
8394 /* Make sure this symbol is output as a dynamic symbol.
8395 Undefined weak syms won't yet be marked as dynamic. */
8396 if (h->dynindx == -1
8397 && !h->forced_local)
8398 {
8399 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8400 return FALSE;
8401 }
8402
8403 /* If that succeeded, we know we'll be keeping all the
8404 relocs. */
8405 if (h->dynindx != -1)
8406 goto keep;
8407 }
8408
8409 eh->dyn_relocs = NULL;
8410
8411 keep: ;
8412 }
8413
8414 /* Finally, allocate space. */
8415 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8416 {
8417 asection *sreloc = elf_section_data (p->sec)->sreloc;
8418 if (!htab->elf.dynamic_sections_created)
8419 sreloc = htab->reliplt;
8420 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8421 }
8422
8423 return TRUE;
8424 }
8425
8426 /* Find any dynamic relocs that apply to read-only sections. */
8427
8428 static bfd_boolean
8429 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8430 {
8431 struct ppc_link_hash_entry *eh;
8432 struct ppc_dyn_relocs *p;
8433
8434 if (h->root.type == bfd_link_hash_warning)
8435 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8436
8437 eh = (struct ppc_link_hash_entry *) h;
8438 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8439 {
8440 asection *s = p->sec->output_section;
8441
8442 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8443 {
8444 struct bfd_link_info *info = inf;
8445
8446 info->flags |= DF_TEXTREL;
8447
8448 /* Not an error, just cut short the traversal. */
8449 return FALSE;
8450 }
8451 }
8452 return TRUE;
8453 }
8454
8455 /* Set the sizes of the dynamic sections. */
8456
8457 static bfd_boolean
8458 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8459 struct bfd_link_info *info)
8460 {
8461 struct ppc_link_hash_table *htab;
8462 bfd *dynobj;
8463 asection *s;
8464 bfd_boolean relocs;
8465 bfd *ibfd;
8466
8467 htab = ppc_hash_table (info);
8468 dynobj = htab->elf.dynobj;
8469 if (dynobj == NULL)
8470 abort ();
8471
8472 if (htab->elf.dynamic_sections_created)
8473 {
8474 /* Set the contents of the .interp section to the interpreter. */
8475 if (info->executable)
8476 {
8477 s = bfd_get_section_by_name (dynobj, ".interp");
8478 if (s == NULL)
8479 abort ();
8480 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8481 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8482 }
8483 }
8484
8485 /* Set up .got offsets for local syms, and space for local dynamic
8486 relocs. */
8487 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8488 {
8489 struct got_entry **lgot_ents;
8490 struct got_entry **end_lgot_ents;
8491 struct plt_entry **local_plt;
8492 struct plt_entry **end_local_plt;
8493 char *lgot_masks;
8494 bfd_size_type locsymcount;
8495 Elf_Internal_Shdr *symtab_hdr;
8496 asection *srel;
8497
8498 if (!is_ppc64_elf (ibfd))
8499 continue;
8500
8501 for (s = ibfd->sections; s != NULL; s = s->next)
8502 {
8503 struct ppc_dyn_relocs *p;
8504
8505 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8506 {
8507 if (!bfd_is_abs_section (p->sec)
8508 && bfd_is_abs_section (p->sec->output_section))
8509 {
8510 /* Input section has been discarded, either because
8511 it is a copy of a linkonce section or due to
8512 linker script /DISCARD/, so we'll be discarding
8513 the relocs too. */
8514 }
8515 else if (p->count != 0)
8516 {
8517 srel = elf_section_data (p->sec)->sreloc;
8518 if (!htab->elf.dynamic_sections_created)
8519 srel = htab->reliplt;
8520 srel->size += p->count * sizeof (Elf64_External_Rela);
8521 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8522 info->flags |= DF_TEXTREL;
8523 }
8524 }
8525 }
8526
8527 lgot_ents = elf_local_got_ents (ibfd);
8528 if (!lgot_ents)
8529 continue;
8530
8531 symtab_hdr = &elf_symtab_hdr (ibfd);
8532 locsymcount = symtab_hdr->sh_info;
8533 end_lgot_ents = lgot_ents + locsymcount;
8534 local_plt = (struct plt_entry **) end_lgot_ents;
8535 end_local_plt = local_plt + locsymcount;
8536 lgot_masks = (char *) end_local_plt;
8537 s = ppc64_elf_tdata (ibfd)->got;
8538 srel = ppc64_elf_tdata (ibfd)->relgot;
8539 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8540 {
8541 struct got_entry *ent;
8542
8543 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8544 if (ent->got.refcount > 0)
8545 {
8546 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8547 {
8548 ppc64_tlsld_got (ibfd)->refcount += 1;
8549 ent->got.offset = (bfd_vma) -1;
8550 }
8551 else
8552 {
8553 unsigned int num = 1;
8554 ent->got.offset = s->size;
8555 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8556 num = 2;
8557 s->size += num * 8;
8558 if (info->shared)
8559 srel->size += num * sizeof (Elf64_External_Rela);
8560 else if ((*lgot_masks & PLT_IFUNC) != 0)
8561 htab->reliplt->size += num * sizeof (Elf64_External_Rela);
8562 }
8563 }
8564 else
8565 ent->got.offset = (bfd_vma) -1;
8566 }
8567
8568 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8569 for (; local_plt < end_local_plt; ++local_plt)
8570 {
8571 struct plt_entry *ent;
8572
8573 for (ent = *local_plt; ent != NULL; ent = ent->next)
8574 if (ent->plt.refcount > 0)
8575 {
8576 s = htab->iplt;
8577 ent->plt.offset = s->size;
8578 s->size += PLT_ENTRY_SIZE;
8579
8580 htab->reliplt->size += sizeof (Elf64_External_Rela);
8581 }
8582 else
8583 ent->plt.offset = (bfd_vma) -1;
8584 }
8585 }
8586
8587 /* Allocate global sym .plt and .got entries, and space for global
8588 sym dynamic relocs. */
8589 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8590
8591 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8592 {
8593 if (!is_ppc64_elf (ibfd))
8594 continue;
8595
8596 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8597 {
8598 s = ppc64_elf_tdata (ibfd)->got;
8599 ppc64_tlsld_got (ibfd)->offset = s->size;
8600 s->size += 16;
8601 if (info->shared)
8602 {
8603 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8604 srel->size += sizeof (Elf64_External_Rela);
8605 }
8606 }
8607 else
8608 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8609 }
8610
8611 /* We now have determined the sizes of the various dynamic sections.
8612 Allocate memory for them. */
8613 relocs = FALSE;
8614 for (s = dynobj->sections; s != NULL; s = s->next)
8615 {
8616 if ((s->flags & SEC_LINKER_CREATED) == 0)
8617 continue;
8618
8619 if (s == htab->brlt || s == htab->relbrlt)
8620 /* These haven't been allocated yet; don't strip. */
8621 continue;
8622 else if (s == htab->got
8623 || s == htab->plt
8624 || s == htab->iplt
8625 || s == htab->glink
8626 || s == htab->dynbss)
8627 {
8628 /* Strip this section if we don't need it; see the
8629 comment below. */
8630 }
8631 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8632 {
8633 if (s->size != 0)
8634 {
8635 if (s != htab->relplt)
8636 relocs = TRUE;
8637
8638 /* We use the reloc_count field as a counter if we need
8639 to copy relocs into the output file. */
8640 s->reloc_count = 0;
8641 }
8642 }
8643 else
8644 {
8645 /* It's not one of our sections, so don't allocate space. */
8646 continue;
8647 }
8648
8649 if (s->size == 0)
8650 {
8651 /* If we don't need this section, strip it from the
8652 output file. This is mostly to handle .rela.bss and
8653 .rela.plt. We must create both sections in
8654 create_dynamic_sections, because they must be created
8655 before the linker maps input sections to output
8656 sections. The linker does that before
8657 adjust_dynamic_symbol is called, and it is that
8658 function which decides whether anything needs to go
8659 into these sections. */
8660 s->flags |= SEC_EXCLUDE;
8661 continue;
8662 }
8663
8664 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8665 continue;
8666
8667 /* Allocate memory for the section contents. We use bfd_zalloc
8668 here in case unused entries are not reclaimed before the
8669 section's contents are written out. This should not happen,
8670 but this way if it does we get a R_PPC64_NONE reloc in .rela
8671 sections instead of garbage.
8672 We also rely on the section contents being zero when writing
8673 the GOT. */
8674 s->contents = bfd_zalloc (dynobj, s->size);
8675 if (s->contents == NULL)
8676 return FALSE;
8677 }
8678
8679 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8680 {
8681 if (!is_ppc64_elf (ibfd))
8682 continue;
8683
8684 s = ppc64_elf_tdata (ibfd)->got;
8685 if (s != NULL && s != htab->got)
8686 {
8687 if (s->size == 0)
8688 s->flags |= SEC_EXCLUDE;
8689 else
8690 {
8691 s->contents = bfd_zalloc (ibfd, s->size);
8692 if (s->contents == NULL)
8693 return FALSE;
8694 }
8695 }
8696 s = ppc64_elf_tdata (ibfd)->relgot;
8697 if (s != NULL)
8698 {
8699 if (s->size == 0)
8700 s->flags |= SEC_EXCLUDE;
8701 else
8702 {
8703 s->contents = bfd_zalloc (ibfd, s->size);
8704 if (s->contents == NULL)
8705 return FALSE;
8706 relocs = TRUE;
8707 s->reloc_count = 0;
8708 }
8709 }
8710 }
8711
8712 if (htab->elf.dynamic_sections_created)
8713 {
8714 /* Add some entries to the .dynamic section. We fill in the
8715 values later, in ppc64_elf_finish_dynamic_sections, but we
8716 must add the entries now so that we get the correct size for
8717 the .dynamic section. The DT_DEBUG entry is filled in by the
8718 dynamic linker and used by the debugger. */
8719 #define add_dynamic_entry(TAG, VAL) \
8720 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8721
8722 if (info->executable)
8723 {
8724 if (!add_dynamic_entry (DT_DEBUG, 0))
8725 return FALSE;
8726 }
8727
8728 if (htab->plt != NULL && htab->plt->size != 0)
8729 {
8730 if (!add_dynamic_entry (DT_PLTGOT, 0)
8731 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8732 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8733 || !add_dynamic_entry (DT_JMPREL, 0)
8734 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8735 return FALSE;
8736 }
8737
8738 if (NO_OPD_RELOCS)
8739 {
8740 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8741 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8742 return FALSE;
8743 }
8744
8745 if (!htab->no_tls_get_addr_opt
8746 && htab->tls_get_addr_fd != NULL
8747 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8748 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8749 return FALSE;
8750
8751 if (relocs)
8752 {
8753 if (!add_dynamic_entry (DT_RELA, 0)
8754 || !add_dynamic_entry (DT_RELASZ, 0)
8755 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8756 return FALSE;
8757
8758 /* If any dynamic relocs apply to a read-only section,
8759 then we need a DT_TEXTREL entry. */
8760 if ((info->flags & DF_TEXTREL) == 0)
8761 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8762
8763 if ((info->flags & DF_TEXTREL) != 0)
8764 {
8765 if (!add_dynamic_entry (DT_TEXTREL, 0))
8766 return FALSE;
8767 }
8768 }
8769 }
8770 #undef add_dynamic_entry
8771
8772 return TRUE;
8773 }
8774
8775 /* Determine the type of stub needed, if any, for a call. */
8776
8777 static inline enum ppc_stub_type
8778 ppc_type_of_stub (asection *input_sec,
8779 const Elf_Internal_Rela *rel,
8780 struct ppc_link_hash_entry **hash,
8781 struct plt_entry **plt_ent,
8782 bfd_vma destination)
8783 {
8784 struct ppc_link_hash_entry *h = *hash;
8785 bfd_vma location;
8786 bfd_vma branch_offset;
8787 bfd_vma max_branch_offset;
8788 enum elf_ppc64_reloc_type r_type;
8789
8790 if (h != NULL)
8791 {
8792 struct plt_entry *ent;
8793 struct ppc_link_hash_entry *fdh = h;
8794 if (h->oh != NULL
8795 && h->oh->is_func_descriptor)
8796 fdh = ppc_follow_link (h->oh);
8797
8798 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8799 if (ent->addend == rel->r_addend
8800 && ent->plt.offset != (bfd_vma) -1)
8801 {
8802 *hash = fdh;
8803 *plt_ent = ent;
8804 return ppc_stub_plt_call;
8805 }
8806
8807 /* Here, we know we don't have a plt entry. If we don't have a
8808 either a defined function descriptor or a defined entry symbol
8809 in a regular object file, then it is pointless trying to make
8810 any other type of stub. */
8811 if (!((fdh->elf.root.type == bfd_link_hash_defined
8812 || fdh->elf.root.type == bfd_link_hash_defweak)
8813 && fdh->elf.root.u.def.section->output_section != NULL)
8814 && !((h->elf.root.type == bfd_link_hash_defined
8815 || h->elf.root.type == bfd_link_hash_defweak)
8816 && h->elf.root.u.def.section->output_section != NULL))
8817 return ppc_stub_none;
8818 }
8819 else if (elf_local_got_ents (input_sec->owner) != NULL)
8820 {
8821 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
8822 struct plt_entry **local_plt = (struct plt_entry **)
8823 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
8824 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
8825
8826 if (local_plt[r_symndx] != NULL)
8827 {
8828 struct plt_entry *ent;
8829
8830 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
8831 if (ent->addend == rel->r_addend
8832 && ent->plt.offset != (bfd_vma) -1)
8833 {
8834 *plt_ent = ent;
8835 return ppc_stub_plt_call;
8836 }
8837 }
8838 }
8839
8840 /* Determine where the call point is. */
8841 location = (input_sec->output_offset
8842 + input_sec->output_section->vma
8843 + rel->r_offset);
8844
8845 branch_offset = destination - location;
8846 r_type = ELF64_R_TYPE (rel->r_info);
8847
8848 /* Determine if a long branch stub is needed. */
8849 max_branch_offset = 1 << 25;
8850 if (r_type != R_PPC64_REL24)
8851 max_branch_offset = 1 << 15;
8852
8853 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8854 /* We need a stub. Figure out whether a long_branch or plt_branch
8855 is needed later. */
8856 return ppc_stub_long_branch;
8857
8858 return ppc_stub_none;
8859 }
8860
8861 /* Build a .plt call stub. */
8862
8863 static inline bfd_byte *
8864 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8865 {
8866 #define PPC_LO(v) ((v) & 0xffff)
8867 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8868 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8869
8870 if (PPC_HA (offset) != 0)
8871 {
8872 if (r != NULL)
8873 {
8874 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8875 r[1].r_offset = r[0].r_offset + 8;
8876 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8877 r[1].r_addend = r[0].r_addend;
8878 if (PPC_HA (offset + 16) != PPC_HA (offset))
8879 {
8880 r[2].r_offset = r[1].r_offset + 4;
8881 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
8882 r[2].r_addend = r[0].r_addend;
8883 }
8884 else
8885 {
8886 r[2].r_offset = r[1].r_offset + 8;
8887 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8888 r[2].r_addend = r[0].r_addend + 8;
8889 r[3].r_offset = r[2].r_offset + 4;
8890 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8891 r[3].r_addend = r[0].r_addend + 16;
8892 }
8893 }
8894 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8895 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8896 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8897 if (PPC_HA (offset + 16) != PPC_HA (offset))
8898 {
8899 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8900 offset = 0;
8901 }
8902 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8903 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8904 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8905 bfd_put_32 (obfd, BCTR, p), p += 4;
8906 }
8907 else
8908 {
8909 if (r != NULL)
8910 {
8911 r[0].r_offset += 4;
8912 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8913 if (PPC_HA (offset + 16) != PPC_HA (offset))
8914 {
8915 r[1].r_offset = r[0].r_offset + 4;
8916 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
8917 r[1].r_addend = r[0].r_addend;
8918 }
8919 else
8920 {
8921 r[1].r_offset = r[0].r_offset + 8;
8922 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8923 r[1].r_addend = r[0].r_addend + 16;
8924 r[2].r_offset = r[1].r_offset + 4;
8925 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8926 r[2].r_addend = r[0].r_addend + 8;
8927 }
8928 }
8929 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8930 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8931 if (PPC_HA (offset + 16) != PPC_HA (offset))
8932 {
8933 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8934 offset = 0;
8935 }
8936 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8937 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8938 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8939 bfd_put_32 (obfd, BCTR, p), p += 4;
8940 }
8941 return p;
8942 }
8943
8944 /* Build a special .plt call stub for __tls_get_addr. */
8945
8946 #define LD_R11_0R3 0xe9630000
8947 #define LD_R12_0R3 0xe9830000
8948 #define MR_R0_R3 0x7c601b78
8949 #define CMPDI_R11_0 0x2c2b0000
8950 #define ADD_R3_R12_R13 0x7c6c6a14
8951 #define BEQLR 0x4d820020
8952 #define MR_R3_R0 0x7c030378
8953 #define MFLR_R11 0x7d6802a6
8954 #define STD_R11_0R1 0xf9610000
8955 #define BCTRL 0x4e800421
8956 #define LD_R11_0R1 0xe9610000
8957 #define LD_R2_0R1 0xe8410000
8958 #define MTLR_R11 0x7d6803a6
8959
8960 static inline bfd_byte *
8961 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
8962 Elf_Internal_Rela *r)
8963 {
8964 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
8965 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
8966 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
8967 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
8968 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
8969 bfd_put_32 (obfd, BEQLR, p), p += 4;
8970 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
8971 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
8972 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
8973
8974 if (r != NULL)
8975 r[0].r_offset += 9 * 4;
8976 p = build_plt_stub (obfd, p, offset, r);
8977 bfd_put_32 (obfd, BCTRL, p - 4);
8978
8979 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
8980 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
8981 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
8982 bfd_put_32 (obfd, BLR, p), p += 4;
8983
8984 return p;
8985 }
8986
8987 static Elf_Internal_Rela *
8988 get_relocs (asection *sec, int count)
8989 {
8990 Elf_Internal_Rela *relocs;
8991 struct bfd_elf_section_data *elfsec_data;
8992
8993 elfsec_data = elf_section_data (sec);
8994 relocs = elfsec_data->relocs;
8995 if (relocs == NULL)
8996 {
8997 bfd_size_type relsize;
8998 relsize = sec->reloc_count * sizeof (*relocs);
8999 relocs = bfd_alloc (sec->owner, relsize);
9000 if (relocs == NULL)
9001 return NULL;
9002 elfsec_data->relocs = relocs;
9003 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9004 * sizeof (Elf64_External_Rela));
9005 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9006 sec->reloc_count = 0;
9007 }
9008 relocs += sec->reloc_count;
9009 sec->reloc_count += count;
9010 return relocs;
9011 }
9012
9013 static bfd_boolean
9014 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9015 {
9016 struct ppc_stub_hash_entry *stub_entry;
9017 struct ppc_branch_hash_entry *br_entry;
9018 struct bfd_link_info *info;
9019 struct ppc_link_hash_table *htab;
9020 bfd_byte *loc;
9021 bfd_byte *p;
9022 bfd_vma dest, off;
9023 int size;
9024 Elf_Internal_Rela *r;
9025 asection *plt;
9026
9027 /* Massage our args to the form they really have. */
9028 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9029 info = in_arg;
9030
9031 htab = ppc_hash_table (info);
9032
9033 /* Make a note of the offset within the stubs for this entry. */
9034 stub_entry->stub_offset = stub_entry->stub_sec->size;
9035 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9036
9037 htab->stub_count[stub_entry->stub_type - 1] += 1;
9038 switch (stub_entry->stub_type)
9039 {
9040 case ppc_stub_long_branch:
9041 case ppc_stub_long_branch_r2off:
9042 /* Branches are relative. This is where we are going to. */
9043 off = dest = (stub_entry->target_value
9044 + stub_entry->target_section->output_offset
9045 + stub_entry->target_section->output_section->vma);
9046
9047 /* And this is where we are coming from. */
9048 off -= (stub_entry->stub_offset
9049 + stub_entry->stub_sec->output_offset
9050 + stub_entry->stub_sec->output_section->vma);
9051
9052 size = 4;
9053 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9054 {
9055 bfd_vma r2off;
9056
9057 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9058 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9059 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9060 loc += 4;
9061 size = 12;
9062 if (PPC_HA (r2off) != 0)
9063 {
9064 size = 16;
9065 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9066 loc += 4;
9067 }
9068 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9069 loc += 4;
9070 off -= size - 4;
9071 }
9072 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9073
9074 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9075 {
9076 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9077 stub_entry->root.string);
9078 htab->stub_error = TRUE;
9079 return FALSE;
9080 }
9081
9082 if (info->emitrelocations)
9083 {
9084 r = get_relocs (stub_entry->stub_sec, 1);
9085 if (r == NULL)
9086 return FALSE;
9087 r->r_offset = loc - stub_entry->stub_sec->contents;
9088 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9089 r->r_addend = dest;
9090 if (stub_entry->h != NULL)
9091 {
9092 struct elf_link_hash_entry **hashes;
9093 unsigned long symndx;
9094 struct ppc_link_hash_entry *h;
9095
9096 hashes = elf_sym_hashes (htab->stub_bfd);
9097 if (hashes == NULL)
9098 {
9099 bfd_size_type hsize;
9100
9101 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9102 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9103 if (hashes == NULL)
9104 return FALSE;
9105 elf_sym_hashes (htab->stub_bfd) = hashes;
9106 htab->stub_globals = 1;
9107 }
9108 symndx = htab->stub_globals++;
9109 h = stub_entry->h;
9110 hashes[symndx] = &h->elf;
9111 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9112 if (h->oh != NULL && h->oh->is_func)
9113 h = ppc_follow_link (h->oh);
9114 if (h->elf.root.u.def.section != stub_entry->target_section)
9115 /* H is an opd symbol. The addend must be zero. */
9116 r->r_addend = 0;
9117 else
9118 {
9119 off = (h->elf.root.u.def.value
9120 + h->elf.root.u.def.section->output_offset
9121 + h->elf.root.u.def.section->output_section->vma);
9122 r->r_addend -= off;
9123 }
9124 }
9125 }
9126 break;
9127
9128 case ppc_stub_plt_branch:
9129 case ppc_stub_plt_branch_r2off:
9130 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9131 stub_entry->root.string + 9,
9132 FALSE, FALSE);
9133 if (br_entry == NULL)
9134 {
9135 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9136 stub_entry->root.string);
9137 htab->stub_error = TRUE;
9138 return FALSE;
9139 }
9140
9141 dest = (stub_entry->target_value
9142 + stub_entry->target_section->output_offset
9143 + stub_entry->target_section->output_section->vma);
9144
9145 bfd_put_64 (htab->brlt->owner, dest,
9146 htab->brlt->contents + br_entry->offset);
9147
9148 if (br_entry->iter == htab->stub_iteration)
9149 {
9150 br_entry->iter = 0;
9151
9152 if (htab->relbrlt != NULL)
9153 {
9154 /* Create a reloc for the branch lookup table entry. */
9155 Elf_Internal_Rela rela;
9156 bfd_byte *rl;
9157
9158 rela.r_offset = (br_entry->offset
9159 + htab->brlt->output_offset
9160 + htab->brlt->output_section->vma);
9161 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9162 rela.r_addend = dest;
9163
9164 rl = htab->relbrlt->contents;
9165 rl += (htab->relbrlt->reloc_count++
9166 * sizeof (Elf64_External_Rela));
9167 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9168 }
9169 else if (info->emitrelocations)
9170 {
9171 r = get_relocs (htab->brlt, 1);
9172 if (r == NULL)
9173 return FALSE;
9174 /* brlt, being SEC_LINKER_CREATED does not go through the
9175 normal reloc processing. Symbols and offsets are not
9176 translated from input file to output file form, so
9177 set up the offset per the output file. */
9178 r->r_offset = (br_entry->offset
9179 + htab->brlt->output_offset
9180 + htab->brlt->output_section->vma);
9181 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9182 r->r_addend = dest;
9183 }
9184 }
9185
9186 dest = (br_entry->offset
9187 + htab->brlt->output_offset
9188 + htab->brlt->output_section->vma);
9189
9190 off = (dest
9191 - elf_gp (htab->brlt->output_section->owner)
9192 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9193
9194 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9195 {
9196 (*_bfd_error_handler)
9197 (_("linkage table error against `%s'"),
9198 stub_entry->root.string);
9199 bfd_set_error (bfd_error_bad_value);
9200 htab->stub_error = TRUE;
9201 return FALSE;
9202 }
9203
9204 if (info->emitrelocations)
9205 {
9206 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9207 if (r == NULL)
9208 return FALSE;
9209 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9210 if (bfd_big_endian (info->output_bfd))
9211 r[0].r_offset += 2;
9212 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9213 r[0].r_offset += 4;
9214 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9215 r[0].r_addend = dest;
9216 if (PPC_HA (off) != 0)
9217 {
9218 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9219 r[1].r_offset = r[0].r_offset + 4;
9220 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9221 r[1].r_addend = r[0].r_addend;
9222 }
9223 }
9224
9225 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9226 {
9227 if (PPC_HA (off) != 0)
9228 {
9229 size = 16;
9230 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9231 loc += 4;
9232 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9233 }
9234 else
9235 {
9236 size = 12;
9237 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9238 }
9239 }
9240 else
9241 {
9242 bfd_vma r2off;
9243
9244 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9245 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9246 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9247 loc += 4;
9248 size = 20;
9249 if (PPC_HA (off) != 0)
9250 {
9251 size += 4;
9252 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9253 loc += 4;
9254 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9255 loc += 4;
9256 }
9257 else
9258 {
9259 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9260 loc += 4;
9261 }
9262
9263 if (PPC_HA (r2off) != 0)
9264 {
9265 size += 4;
9266 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9267 loc += 4;
9268 }
9269 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9270 }
9271 loc += 4;
9272 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9273 loc += 4;
9274 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9275 break;
9276
9277 case ppc_stub_plt_call:
9278 if (stub_entry->h != NULL
9279 && stub_entry->h->is_func_descriptor
9280 && stub_entry->h->oh != NULL)
9281 {
9282 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9283
9284 /* If the old-ABI "dot-symbol" is undefined make it weak so
9285 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9286 FIXME: We used to define the symbol on one of the call
9287 stubs instead, which is why we test symbol section id
9288 against htab->top_id in various places. Likely all
9289 these checks could now disappear. */
9290 if (fh->elf.root.type == bfd_link_hash_undefined)
9291 fh->elf.root.type = bfd_link_hash_undefweak;
9292 }
9293
9294 /* Now build the stub. */
9295 dest = stub_entry->plt_ent->plt.offset & ~1;
9296 if (dest >= (bfd_vma) -2)
9297 abort ();
9298
9299 plt = htab->plt;
9300 if (!htab->elf.dynamic_sections_created
9301 || stub_entry->h == NULL
9302 || stub_entry->h->elf.dynindx == -1)
9303 plt = htab->iplt;
9304
9305 dest += plt->output_offset + plt->output_section->vma;
9306
9307 if (stub_entry->h == NULL
9308 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9309 {
9310 Elf_Internal_Rela rela;
9311 bfd_byte *rl;
9312
9313 rela.r_offset = dest;
9314 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9315 rela.r_addend = (stub_entry->target_value
9316 + stub_entry->target_section->output_offset
9317 + stub_entry->target_section->output_section->vma);
9318
9319 rl = (htab->reliplt->contents
9320 + (htab->reliplt->reloc_count++
9321 * sizeof (Elf64_External_Rela)));
9322 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9323 stub_entry->plt_ent->plt.offset |= 1;
9324 }
9325
9326 off = (dest
9327 - elf_gp (plt->output_section->owner)
9328 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9329
9330 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9331 {
9332 (*_bfd_error_handler)
9333 (_("linkage table error against `%s'"),
9334 stub_entry->h != NULL
9335 ? stub_entry->h->elf.root.root.string
9336 : "<local sym>");
9337 bfd_set_error (bfd_error_bad_value);
9338 htab->stub_error = TRUE;
9339 return FALSE;
9340 }
9341
9342 r = NULL;
9343 if (info->emitrelocations)
9344 {
9345 r = get_relocs (stub_entry->stub_sec,
9346 (2 + (PPC_HA (off) != 0)
9347 + (PPC_HA (off + 16) == PPC_HA (off))));
9348 if (r == NULL)
9349 return FALSE;
9350 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9351 if (bfd_big_endian (info->output_bfd))
9352 r[0].r_offset += 2;
9353 r[0].r_addend = dest;
9354 }
9355 if (stub_entry->h != NULL
9356 && (stub_entry->h == htab->tls_get_addr_fd
9357 || stub_entry->h == htab->tls_get_addr)
9358 && !htab->no_tls_get_addr_opt)
9359 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9360 else
9361 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9362 size = p - loc;
9363 break;
9364
9365 default:
9366 BFD_FAIL ();
9367 return FALSE;
9368 }
9369
9370 stub_entry->stub_sec->size += size;
9371
9372 if (htab->emit_stub_syms)
9373 {
9374 struct elf_link_hash_entry *h;
9375 size_t len1, len2;
9376 char *name;
9377 const char *const stub_str[] = { "long_branch",
9378 "long_branch_r2off",
9379 "plt_branch",
9380 "plt_branch_r2off",
9381 "plt_call" };
9382
9383 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9384 len2 = strlen (stub_entry->root.string);
9385 name = bfd_malloc (len1 + len2 + 2);
9386 if (name == NULL)
9387 return FALSE;
9388 memcpy (name, stub_entry->root.string, 9);
9389 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9390 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9391 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9392 if (h == NULL)
9393 return FALSE;
9394 if (h->root.type == bfd_link_hash_new)
9395 {
9396 h->root.type = bfd_link_hash_defined;
9397 h->root.u.def.section = stub_entry->stub_sec;
9398 h->root.u.def.value = stub_entry->stub_offset;
9399 h->ref_regular = 1;
9400 h->def_regular = 1;
9401 h->ref_regular_nonweak = 1;
9402 h->forced_local = 1;
9403 h->non_elf = 0;
9404 }
9405 }
9406
9407 return TRUE;
9408 }
9409
9410 /* As above, but don't actually build the stub. Just bump offset so
9411 we know stub section sizes, and select plt_branch stubs where
9412 long_branch stubs won't do. */
9413
9414 static bfd_boolean
9415 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9416 {
9417 struct ppc_stub_hash_entry *stub_entry;
9418 struct bfd_link_info *info;
9419 struct ppc_link_hash_table *htab;
9420 bfd_vma off;
9421 int size;
9422
9423 /* Massage our args to the form they really have. */
9424 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9425 info = in_arg;
9426
9427 htab = ppc_hash_table (info);
9428
9429 if (stub_entry->stub_type == ppc_stub_plt_call)
9430 {
9431 asection *plt;
9432 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9433 if (off >= (bfd_vma) -2)
9434 abort ();
9435 plt = htab->plt;
9436 if (!htab->elf.dynamic_sections_created
9437 || stub_entry->h == NULL
9438 || stub_entry->h->elf.dynindx == -1)
9439 plt = htab->iplt;
9440 off += (plt->output_offset
9441 + plt->output_section->vma
9442 - elf_gp (plt->output_section->owner)
9443 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9444
9445 size = PLT_CALL_STUB_SIZE;
9446 if (PPC_HA (off) == 0)
9447 size -= 4;
9448 if (PPC_HA (off + 16) != PPC_HA (off))
9449 size += 4;
9450 if (stub_entry->h != NULL
9451 && (stub_entry->h == htab->tls_get_addr_fd
9452 || stub_entry->h == htab->tls_get_addr)
9453 && !htab->no_tls_get_addr_opt)
9454 size += 13 * 4;
9455 if (info->emitrelocations)
9456 {
9457 stub_entry->stub_sec->reloc_count
9458 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9459 stub_entry->stub_sec->flags |= SEC_RELOC;
9460 }
9461 }
9462 else
9463 {
9464 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9465 variants. */
9466 bfd_vma r2off = 0;
9467
9468 off = (stub_entry->target_value
9469 + stub_entry->target_section->output_offset
9470 + stub_entry->target_section->output_section->vma);
9471 off -= (stub_entry->stub_sec->size
9472 + stub_entry->stub_sec->output_offset
9473 + stub_entry->stub_sec->output_section->vma);
9474
9475 /* Reset the stub type from the plt variant in case we now
9476 can reach with a shorter stub. */
9477 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9478 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9479
9480 size = 4;
9481 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9482 {
9483 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9484 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9485 size = 12;
9486 if (PPC_HA (r2off) != 0)
9487 size = 16;
9488 off -= size - 4;
9489 }
9490
9491 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9492 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9493 {
9494 struct ppc_branch_hash_entry *br_entry;
9495
9496 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9497 stub_entry->root.string + 9,
9498 TRUE, FALSE);
9499 if (br_entry == NULL)
9500 {
9501 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9502 stub_entry->root.string);
9503 htab->stub_error = TRUE;
9504 return FALSE;
9505 }
9506
9507 if (br_entry->iter != htab->stub_iteration)
9508 {
9509 br_entry->iter = htab->stub_iteration;
9510 br_entry->offset = htab->brlt->size;
9511 htab->brlt->size += 8;
9512
9513 if (htab->relbrlt != NULL)
9514 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9515 else if (info->emitrelocations)
9516 {
9517 htab->brlt->reloc_count += 1;
9518 htab->brlt->flags |= SEC_RELOC;
9519 }
9520 }
9521
9522 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9523 off = (br_entry->offset
9524 + htab->brlt->output_offset
9525 + htab->brlt->output_section->vma
9526 - elf_gp (htab->brlt->output_section->owner)
9527 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9528
9529 if (info->emitrelocations)
9530 {
9531 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9532 stub_entry->stub_sec->flags |= SEC_RELOC;
9533 }
9534
9535 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9536 {
9537 size = 12;
9538 if (PPC_HA (off) != 0)
9539 size = 16;
9540 }
9541 else
9542 {
9543 size = 20;
9544 if (PPC_HA (off) != 0)
9545 size += 4;
9546
9547 if (PPC_HA (r2off) != 0)
9548 size += 4;
9549 }
9550 }
9551 else if (info->emitrelocations)
9552 {
9553 stub_entry->stub_sec->reloc_count += 1;
9554 stub_entry->stub_sec->flags |= SEC_RELOC;
9555 }
9556 }
9557
9558 stub_entry->stub_sec->size += size;
9559 return TRUE;
9560 }
9561
9562 /* Set up various things so that we can make a list of input sections
9563 for each output section included in the link. Returns -1 on error,
9564 0 when no stubs will be needed, and 1 on success. */
9565
9566 int
9567 ppc64_elf_setup_section_lists (bfd *output_bfd,
9568 struct bfd_link_info *info,
9569 int no_multi_toc)
9570 {
9571 bfd *input_bfd;
9572 int top_id, top_index, id;
9573 asection *section;
9574 asection **input_list;
9575 bfd_size_type amt;
9576 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9577
9578 htab->no_multi_toc = no_multi_toc;
9579
9580 if (htab->brlt == NULL)
9581 return 0;
9582
9583 /* Find the top input section id. */
9584 for (input_bfd = info->input_bfds, top_id = 3;
9585 input_bfd != NULL;
9586 input_bfd = input_bfd->link_next)
9587 {
9588 for (section = input_bfd->sections;
9589 section != NULL;
9590 section = section->next)
9591 {
9592 if (top_id < section->id)
9593 top_id = section->id;
9594 }
9595 }
9596
9597 htab->top_id = top_id;
9598 amt = sizeof (struct map_stub) * (top_id + 1);
9599 htab->stub_group = bfd_zmalloc (amt);
9600 if (htab->stub_group == NULL)
9601 return -1;
9602
9603 /* Set toc_off for com, und, abs and ind sections. */
9604 for (id = 0; id < 3; id++)
9605 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9606
9607 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
9608
9609 /* We can't use output_bfd->section_count here to find the top output
9610 section index as some sections may have been removed, and
9611 strip_excluded_output_sections doesn't renumber the indices. */
9612 for (section = output_bfd->sections, top_index = 0;
9613 section != NULL;
9614 section = section->next)
9615 {
9616 if (top_index < section->index)
9617 top_index = section->index;
9618 }
9619
9620 htab->top_index = top_index;
9621 amt = sizeof (asection *) * (top_index + 1);
9622 input_list = bfd_zmalloc (amt);
9623 htab->input_list = input_list;
9624 if (input_list == NULL)
9625 return -1;
9626
9627 return 1;
9628 }
9629
9630 /* The linker repeatedly calls this function for each TOC input section
9631 and linker generated GOT section. Group input bfds such that the toc
9632 within a group is less than 64k in size. Will break with cute linker
9633 scripts that play games with dot in the output toc section. */
9634
9635 void
9636 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9637 {
9638 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9639
9640 if (!htab->no_multi_toc)
9641 {
9642 bfd_vma addr = isec->output_offset + isec->output_section->vma;
9643 bfd_vma off = addr - htab->toc_curr;
9644
9645 if (off + isec->size > 0x10000)
9646 htab->toc_curr = addr;
9647
9648 elf_gp (isec->owner) = (htab->toc_curr
9649 - elf_gp (isec->output_section->owner)
9650 + TOC_BASE_OFF);
9651 }
9652 }
9653
9654 /* Called after the last call to the above function. */
9655
9656 void
9657 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
9658 {
9659 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9660
9661 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
9662
9663 /* toc_curr tracks the TOC offset used for code sections below in
9664 ppc64_elf_next_input_section. Start off at 0x8000. */
9665 htab->toc_curr = TOC_BASE_OFF;
9666 }
9667
9668 /* No toc references were found in ISEC. If the code in ISEC makes no
9669 calls, then there's no need to use toc adjusting stubs when branching
9670 into ISEC. Actually, indirect calls from ISEC are OK as they will
9671 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
9672 needed, and 2 if a cyclical call-graph was found but no other reason
9673 for a stub was detected. If called from the top level, a return of
9674 2 means the same as a return of 0. */
9675
9676 static int
9677 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
9678 {
9679 Elf_Internal_Rela *relstart, *rel;
9680 Elf_Internal_Sym *local_syms;
9681 int ret;
9682 struct ppc_link_hash_table *htab;
9683
9684 /* We know none of our code bearing sections will need toc stubs. */
9685 if ((isec->flags & SEC_LINKER_CREATED) != 0)
9686 return 0;
9687
9688 if (isec->size == 0)
9689 return 0;
9690
9691 if (isec->output_section == NULL)
9692 return 0;
9693
9694 if (isec->reloc_count == 0)
9695 return 0;
9696
9697 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
9698 info->keep_memory);
9699 if (relstart == NULL)
9700 return -1;
9701
9702 /* Look for branches to outside of this section. */
9703 local_syms = NULL;
9704 ret = 0;
9705 htab = ppc_hash_table (info);
9706 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
9707 {
9708 enum elf_ppc64_reloc_type r_type;
9709 unsigned long r_symndx;
9710 struct elf_link_hash_entry *h;
9711 struct ppc_link_hash_entry *eh;
9712 Elf_Internal_Sym *sym;
9713 asection *sym_sec;
9714 struct _opd_sec_data *opd;
9715 bfd_vma sym_value;
9716 bfd_vma dest;
9717
9718 r_type = ELF64_R_TYPE (rel->r_info);
9719 if (r_type != R_PPC64_REL24
9720 && r_type != R_PPC64_REL14
9721 && r_type != R_PPC64_REL14_BRTAKEN
9722 && r_type != R_PPC64_REL14_BRNTAKEN)
9723 continue;
9724
9725 r_symndx = ELF64_R_SYM (rel->r_info);
9726 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
9727 isec->owner))
9728 {
9729 ret = -1;
9730 break;
9731 }
9732
9733 /* Calls to dynamic lib functions go through a plt call stub
9734 that uses r2. */
9735 eh = (struct ppc_link_hash_entry *) h;
9736 if (eh != NULL
9737 && (eh->elf.plt.plist != NULL
9738 || (eh->oh != NULL
9739 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
9740 {
9741 ret = 1;
9742 break;
9743 }
9744
9745 if (sym_sec == NULL)
9746 /* Ignore other undefined symbols. */
9747 continue;
9748
9749 /* Assume branches to other sections not included in the link need
9750 stubs too, to cover -R and absolute syms. */
9751 if (sym_sec->output_section == NULL)
9752 {
9753 ret = 1;
9754 break;
9755 }
9756
9757 if (h == NULL)
9758 sym_value = sym->st_value;
9759 else
9760 {
9761 if (h->root.type != bfd_link_hash_defined
9762 && h->root.type != bfd_link_hash_defweak)
9763 abort ();
9764 sym_value = h->root.u.def.value;
9765 }
9766 sym_value += rel->r_addend;
9767
9768 /* If this branch reloc uses an opd sym, find the code section. */
9769 opd = get_opd_info (sym_sec);
9770 if (opd != NULL)
9771 {
9772 if (h == NULL && opd->adjust != NULL)
9773 {
9774 long adjust;
9775
9776 adjust = opd->adjust[sym->st_value / 8];
9777 if (adjust == -1)
9778 /* Assume deleted functions won't ever be called. */
9779 continue;
9780 sym_value += adjust;
9781 }
9782
9783 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9784 if (dest == (bfd_vma) -1)
9785 continue;
9786 }
9787 else
9788 dest = (sym_value
9789 + sym_sec->output_offset
9790 + sym_sec->output_section->vma);
9791
9792 /* Ignore branch to self. */
9793 if (sym_sec == isec)
9794 continue;
9795
9796 /* If the called function uses the toc, we need a stub. */
9797 if (sym_sec->has_toc_reloc
9798 || sym_sec->makes_toc_func_call)
9799 {
9800 ret = 1;
9801 break;
9802 }
9803
9804 /* Assume any branch that needs a long branch stub might in fact
9805 need a plt_branch stub. A plt_branch stub uses r2. */
9806 else if (dest - (isec->output_offset
9807 + isec->output_section->vma
9808 + rel->r_offset) + (1 << 25) >= (2 << 25))
9809 {
9810 ret = 1;
9811 break;
9812 }
9813
9814 /* If calling back to a section in the process of being tested, we
9815 can't say for sure that no toc adjusting stubs are needed, so
9816 don't return zero. */
9817 else if (sym_sec->call_check_in_progress)
9818 ret = 2;
9819
9820 /* Branches to another section that itself doesn't have any TOC
9821 references are OK. Recursively call ourselves to check. */
9822 else if (sym_sec->id <= htab->top_id
9823 && htab->stub_group[sym_sec->id].toc_off == 0)
9824 {
9825 int recur;
9826
9827 /* Mark current section as indeterminate, so that other
9828 sections that call back to current won't be marked as
9829 known. */
9830 isec->call_check_in_progress = 1;
9831 recur = toc_adjusting_stub_needed (info, sym_sec);
9832 isec->call_check_in_progress = 0;
9833
9834 if (recur < 0)
9835 {
9836 /* An error. Exit. */
9837 ret = -1;
9838 break;
9839 }
9840 else if (recur <= 1)
9841 {
9842 /* Known result. Mark as checked and set section flag. */
9843 htab->stub_group[sym_sec->id].toc_off = 1;
9844 if (recur != 0)
9845 {
9846 sym_sec->makes_toc_func_call = 1;
9847 ret = 1;
9848 break;
9849 }
9850 }
9851 else
9852 {
9853 /* Unknown result. Continue checking. */
9854 ret = 2;
9855 }
9856 }
9857 }
9858
9859 if (local_syms != NULL
9860 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9861 free (local_syms);
9862 if (elf_section_data (isec)->relocs != relstart)
9863 free (relstart);
9864
9865 return ret;
9866 }
9867
9868 /* The linker repeatedly calls this function for each input section,
9869 in the order that input sections are linked into output sections.
9870 Build lists of input sections to determine groupings between which
9871 we may insert linker stubs. */
9872
9873 bfd_boolean
9874 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9875 {
9876 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9877
9878 if ((isec->output_section->flags & SEC_CODE) != 0
9879 && isec->output_section->index <= htab->top_index)
9880 {
9881 asection **list = htab->input_list + isec->output_section->index;
9882 /* Steal the link_sec pointer for our list. */
9883 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9884 /* This happens to make the list in reverse order,
9885 which is what we want. */
9886 PREV_SEC (isec) = *list;
9887 *list = isec;
9888 }
9889
9890 if (htab->multi_toc_needed)
9891 {
9892 /* If a code section has a function that uses the TOC then we need
9893 to use the right TOC (obviously). Also, make sure that .opd gets
9894 the correct TOC value for R_PPC64_TOC relocs that don't have or
9895 can't find their function symbol (shouldn't ever happen now).
9896 Also specially treat .fixup for the linux kernel. .fixup
9897 contains branches, but only back to the function that hit an
9898 exception. */
9899 if (isec->has_toc_reloc
9900 || (isec->flags & SEC_CODE) == 0
9901 || strcmp (isec->name, ".fixup") == 0)
9902 {
9903 if (elf_gp (isec->owner) != 0)
9904 htab->toc_curr = elf_gp (isec->owner);
9905 }
9906 else if (htab->stub_group[isec->id].toc_off == 0)
9907 {
9908 int ret = toc_adjusting_stub_needed (info, isec);
9909 if (ret < 0)
9910 return FALSE;
9911 else
9912 isec->makes_toc_func_call = ret & 1;
9913 }
9914 }
9915
9916 /* Functions that don't use the TOC can belong in any TOC group.
9917 Use the last TOC base. This happens to make _init and _fini
9918 pasting work. */
9919 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9920 return TRUE;
9921 }
9922
9923 /* See whether we can group stub sections together. Grouping stub
9924 sections may result in fewer stubs. More importantly, we need to
9925 put all .init* and .fini* stubs at the beginning of the .init or
9926 .fini output sections respectively, because glibc splits the
9927 _init and _fini functions into multiple parts. Putting a stub in
9928 the middle of a function is not a good idea. */
9929
9930 static void
9931 group_sections (struct ppc_link_hash_table *htab,
9932 bfd_size_type stub_group_size,
9933 bfd_boolean stubs_always_before_branch)
9934 {
9935 asection **list;
9936 bfd_size_type stub14_group_size;
9937 bfd_boolean suppress_size_errors;
9938
9939 suppress_size_errors = FALSE;
9940 stub14_group_size = stub_group_size;
9941 if (stub_group_size == 1)
9942 {
9943 /* Default values. */
9944 if (stubs_always_before_branch)
9945 {
9946 stub_group_size = 0x1e00000;
9947 stub14_group_size = 0x7800;
9948 }
9949 else
9950 {
9951 stub_group_size = 0x1c00000;
9952 stub14_group_size = 0x7000;
9953 }
9954 suppress_size_errors = TRUE;
9955 }
9956
9957 list = htab->input_list + htab->top_index;
9958 do
9959 {
9960 asection *tail = *list;
9961 while (tail != NULL)
9962 {
9963 asection *curr;
9964 asection *prev;
9965 bfd_size_type total;
9966 bfd_boolean big_sec;
9967 bfd_vma curr_toc;
9968
9969 curr = tail;
9970 total = tail->size;
9971 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9972 ? stub14_group_size : stub_group_size);
9973 if (big_sec && !suppress_size_errors)
9974 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9975 tail->owner, tail);
9976 curr_toc = htab->stub_group[tail->id].toc_off;
9977
9978 while ((prev = PREV_SEC (curr)) != NULL
9979 && ((total += curr->output_offset - prev->output_offset)
9980 < (ppc64_elf_section_data (prev)->has_14bit_branch
9981 ? stub14_group_size : stub_group_size))
9982 && htab->stub_group[prev->id].toc_off == curr_toc)
9983 curr = prev;
9984
9985 /* OK, the size from the start of CURR to the end is less
9986 than stub_group_size and thus can be handled by one stub
9987 section. (or the tail section is itself larger than
9988 stub_group_size, in which case we may be toast.) We
9989 should really be keeping track of the total size of stubs
9990 added here, as stubs contribute to the final output
9991 section size. That's a little tricky, and this way will
9992 only break if stubs added make the total size more than
9993 2^25, ie. for the default stub_group_size, if stubs total
9994 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9995 do
9996 {
9997 prev = PREV_SEC (tail);
9998 /* Set up this stub group. */
9999 htab->stub_group[tail->id].link_sec = curr;
10000 }
10001 while (tail != curr && (tail = prev) != NULL);
10002
10003 /* But wait, there's more! Input sections up to stub_group_size
10004 bytes before the stub section can be handled by it too.
10005 Don't do this if we have a really large section after the
10006 stubs, as adding more stubs increases the chance that
10007 branches may not reach into the stub section. */
10008 if (!stubs_always_before_branch && !big_sec)
10009 {
10010 total = 0;
10011 while (prev != NULL
10012 && ((total += tail->output_offset - prev->output_offset)
10013 < (ppc64_elf_section_data (prev)->has_14bit_branch
10014 ? stub14_group_size : stub_group_size))
10015 && htab->stub_group[prev->id].toc_off == curr_toc)
10016 {
10017 tail = prev;
10018 prev = PREV_SEC (tail);
10019 htab->stub_group[tail->id].link_sec = curr;
10020 }
10021 }
10022 tail = prev;
10023 }
10024 }
10025 while (list-- != htab->input_list);
10026 free (htab->input_list);
10027 #undef PREV_SEC
10028 }
10029
10030 /* Determine and set the size of the stub section for a final link.
10031
10032 The basic idea here is to examine all the relocations looking for
10033 PC-relative calls to a target that is unreachable with a "bl"
10034 instruction. */
10035
10036 bfd_boolean
10037 ppc64_elf_size_stubs (bfd *output_bfd,
10038 struct bfd_link_info *info,
10039 bfd_signed_vma group_size,
10040 asection *(*add_stub_section) (const char *, asection *),
10041 void (*layout_sections_again) (void))
10042 {
10043 bfd_size_type stub_group_size;
10044 bfd_boolean stubs_always_before_branch;
10045 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10046
10047 /* Stash our params away. */
10048 htab->add_stub_section = add_stub_section;
10049 htab->layout_sections_again = layout_sections_again;
10050 stubs_always_before_branch = group_size < 0;
10051 if (group_size < 0)
10052 stub_group_size = -group_size;
10053 else
10054 stub_group_size = group_size;
10055
10056 group_sections (htab, stub_group_size, stubs_always_before_branch);
10057
10058 while (1)
10059 {
10060 bfd *input_bfd;
10061 unsigned int bfd_indx;
10062 asection *stub_sec;
10063
10064 htab->stub_iteration += 1;
10065
10066 for (input_bfd = info->input_bfds, bfd_indx = 0;
10067 input_bfd != NULL;
10068 input_bfd = input_bfd->link_next, bfd_indx++)
10069 {
10070 Elf_Internal_Shdr *symtab_hdr;
10071 asection *section;
10072 Elf_Internal_Sym *local_syms = NULL;
10073
10074 if (!is_ppc64_elf (input_bfd))
10075 continue;
10076
10077 /* We'll need the symbol table in a second. */
10078 symtab_hdr = &elf_symtab_hdr (input_bfd);
10079 if (symtab_hdr->sh_info == 0)
10080 continue;
10081
10082 /* Walk over each section attached to the input bfd. */
10083 for (section = input_bfd->sections;
10084 section != NULL;
10085 section = section->next)
10086 {
10087 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10088
10089 /* If there aren't any relocs, then there's nothing more
10090 to do. */
10091 if ((section->flags & SEC_RELOC) == 0
10092 || (section->flags & SEC_ALLOC) == 0
10093 || (section->flags & SEC_LOAD) == 0
10094 || (section->flags & SEC_CODE) == 0
10095 || section->reloc_count == 0)
10096 continue;
10097
10098 /* If this section is a link-once section that will be
10099 discarded, then don't create any stubs. */
10100 if (section->output_section == NULL
10101 || section->output_section->owner != output_bfd)
10102 continue;
10103
10104 /* Get the relocs. */
10105 internal_relocs
10106 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10107 info->keep_memory);
10108 if (internal_relocs == NULL)
10109 goto error_ret_free_local;
10110
10111 /* Now examine each relocation. */
10112 irela = internal_relocs;
10113 irelaend = irela + section->reloc_count;
10114 for (; irela < irelaend; irela++)
10115 {
10116 enum elf_ppc64_reloc_type r_type;
10117 unsigned int r_indx;
10118 enum ppc_stub_type stub_type;
10119 struct ppc_stub_hash_entry *stub_entry;
10120 asection *sym_sec, *code_sec;
10121 bfd_vma sym_value, code_value;
10122 bfd_vma destination;
10123 bfd_boolean ok_dest;
10124 struct ppc_link_hash_entry *hash;
10125 struct ppc_link_hash_entry *fdh;
10126 struct elf_link_hash_entry *h;
10127 Elf_Internal_Sym *sym;
10128 char *stub_name;
10129 const asection *id_sec;
10130 struct _opd_sec_data *opd;
10131 struct plt_entry *plt_ent;
10132
10133 r_type = ELF64_R_TYPE (irela->r_info);
10134 r_indx = ELF64_R_SYM (irela->r_info);
10135
10136 if (r_type >= R_PPC64_max)
10137 {
10138 bfd_set_error (bfd_error_bad_value);
10139 goto error_ret_free_internal;
10140 }
10141
10142 /* Only look for stubs on branch instructions. */
10143 if (r_type != R_PPC64_REL24
10144 && r_type != R_PPC64_REL14
10145 && r_type != R_PPC64_REL14_BRTAKEN
10146 && r_type != R_PPC64_REL14_BRNTAKEN)
10147 continue;
10148
10149 /* Now determine the call target, its name, value,
10150 section. */
10151 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10152 r_indx, input_bfd))
10153 goto error_ret_free_internal;
10154 hash = (struct ppc_link_hash_entry *) h;
10155
10156 ok_dest = FALSE;
10157 fdh = NULL;
10158 sym_value = 0;
10159 if (hash == NULL)
10160 {
10161 sym_value = sym->st_value;
10162 ok_dest = TRUE;
10163 }
10164 else if (hash->elf.root.type == bfd_link_hash_defined
10165 || hash->elf.root.type == bfd_link_hash_defweak)
10166 {
10167 sym_value = hash->elf.root.u.def.value;
10168 if (sym_sec->output_section != NULL)
10169 ok_dest = TRUE;
10170 }
10171 else if (hash->elf.root.type == bfd_link_hash_undefweak
10172 || hash->elf.root.type == bfd_link_hash_undefined)
10173 {
10174 /* Recognise an old ABI func code entry sym, and
10175 use the func descriptor sym instead if it is
10176 defined. */
10177 if (hash->elf.root.root.string[0] == '.'
10178 && (fdh = lookup_fdh (hash, htab)) != NULL)
10179 {
10180 if (fdh->elf.root.type == bfd_link_hash_defined
10181 || fdh->elf.root.type == bfd_link_hash_defweak)
10182 {
10183 sym_sec = fdh->elf.root.u.def.section;
10184 sym_value = fdh->elf.root.u.def.value;
10185 if (sym_sec->output_section != NULL)
10186 ok_dest = TRUE;
10187 }
10188 else
10189 fdh = NULL;
10190 }
10191 }
10192 else
10193 {
10194 bfd_set_error (bfd_error_bad_value);
10195 goto error_ret_free_internal;
10196 }
10197
10198 destination = 0;
10199 if (ok_dest)
10200 {
10201 sym_value += irela->r_addend;
10202 destination = (sym_value
10203 + sym_sec->output_offset
10204 + sym_sec->output_section->vma);
10205 }
10206
10207 code_sec = sym_sec;
10208 code_value = sym_value;
10209 opd = get_opd_info (sym_sec);
10210 if (opd != NULL)
10211 {
10212 bfd_vma dest;
10213
10214 if (hash == NULL && opd->adjust != NULL)
10215 {
10216 long adjust = opd->adjust[sym_value / 8];
10217 if (adjust == -1)
10218 continue;
10219 code_value += adjust;
10220 sym_value += adjust;
10221 }
10222 dest = opd_entry_value (sym_sec, sym_value,
10223 &code_sec, &code_value);
10224 if (dest != (bfd_vma) -1)
10225 {
10226 destination = dest;
10227 if (fdh != NULL)
10228 {
10229 /* Fixup old ABI sym to point at code
10230 entry. */
10231 hash->elf.root.type = bfd_link_hash_defweak;
10232 hash->elf.root.u.def.section = code_sec;
10233 hash->elf.root.u.def.value = code_value;
10234 }
10235 }
10236 }
10237
10238 /* Determine what (if any) linker stub is needed. */
10239 plt_ent = NULL;
10240 stub_type = ppc_type_of_stub (section, irela, &hash,
10241 &plt_ent, destination);
10242
10243 if (stub_type != ppc_stub_plt_call)
10244 {
10245 /* Check whether we need a TOC adjusting stub.
10246 Since the linker pastes together pieces from
10247 different object files when creating the
10248 _init and _fini functions, it may be that a
10249 call to what looks like a local sym is in
10250 fact a call needing a TOC adjustment. */
10251 if (code_sec != NULL
10252 && code_sec->output_section != NULL
10253 && (htab->stub_group[code_sec->id].toc_off
10254 != htab->stub_group[section->id].toc_off)
10255 && (code_sec->has_toc_reloc
10256 || code_sec->makes_toc_func_call))
10257 stub_type = ppc_stub_long_branch_r2off;
10258 }
10259
10260 if (stub_type == ppc_stub_none)
10261 continue;
10262
10263 /* __tls_get_addr calls might be eliminated. */
10264 if (stub_type != ppc_stub_plt_call
10265 && hash != NULL
10266 && (hash == htab->tls_get_addr
10267 || hash == htab->tls_get_addr_fd)
10268 && section->has_tls_reloc
10269 && irela != internal_relocs)
10270 {
10271 /* Get tls info. */
10272 char *tls_mask;
10273
10274 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10275 irela - 1, input_bfd))
10276 goto error_ret_free_internal;
10277 if (*tls_mask != 0)
10278 continue;
10279 }
10280
10281 /* Support for grouping stub sections. */
10282 id_sec = htab->stub_group[section->id].link_sec;
10283
10284 /* Get the name of this stub. */
10285 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10286 if (!stub_name)
10287 goto error_ret_free_internal;
10288
10289 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10290 stub_name, FALSE, FALSE);
10291 if (stub_entry != NULL)
10292 {
10293 /* The proper stub has already been created. */
10294 free (stub_name);
10295 continue;
10296 }
10297
10298 stub_entry = ppc_add_stub (stub_name, section, htab);
10299 if (stub_entry == NULL)
10300 {
10301 free (stub_name);
10302 error_ret_free_internal:
10303 if (elf_section_data (section)->relocs == NULL)
10304 free (internal_relocs);
10305 error_ret_free_local:
10306 if (local_syms != NULL
10307 && (symtab_hdr->contents
10308 != (unsigned char *) local_syms))
10309 free (local_syms);
10310 return FALSE;
10311 }
10312
10313 stub_entry->stub_type = stub_type;
10314 if (stub_type != ppc_stub_plt_call)
10315 {
10316 stub_entry->target_value = code_value;
10317 stub_entry->target_section = code_sec;
10318 }
10319 else
10320 {
10321 stub_entry->target_value = sym_value;
10322 stub_entry->target_section = sym_sec;
10323 }
10324 stub_entry->h = hash;
10325 stub_entry->plt_ent = plt_ent;
10326 stub_entry->addend = irela->r_addend;
10327
10328 if (stub_entry->h != NULL)
10329 htab->stub_globals += 1;
10330 }
10331
10332 /* We're done with the internal relocs, free them. */
10333 if (elf_section_data (section)->relocs != internal_relocs)
10334 free (internal_relocs);
10335 }
10336
10337 if (local_syms != NULL
10338 && symtab_hdr->contents != (unsigned char *) local_syms)
10339 {
10340 if (!info->keep_memory)
10341 free (local_syms);
10342 else
10343 symtab_hdr->contents = (unsigned char *) local_syms;
10344 }
10345 }
10346
10347 /* We may have added some stubs. Find out the new size of the
10348 stub sections. */
10349 for (stub_sec = htab->stub_bfd->sections;
10350 stub_sec != NULL;
10351 stub_sec = stub_sec->next)
10352 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10353 {
10354 stub_sec->rawsize = stub_sec->size;
10355 stub_sec->size = 0;
10356 stub_sec->reloc_count = 0;
10357 stub_sec->flags &= ~SEC_RELOC;
10358 }
10359
10360 htab->brlt->size = 0;
10361 htab->brlt->reloc_count = 0;
10362 htab->brlt->flags &= ~SEC_RELOC;
10363 if (htab->relbrlt != NULL)
10364 htab->relbrlt->size = 0;
10365
10366 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10367
10368 if (info->emitrelocations
10369 && htab->glink != NULL && htab->glink->size != 0)
10370 {
10371 htab->glink->reloc_count = 1;
10372 htab->glink->flags |= SEC_RELOC;
10373 }
10374
10375 for (stub_sec = htab->stub_bfd->sections;
10376 stub_sec != NULL;
10377 stub_sec = stub_sec->next)
10378 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10379 && stub_sec->rawsize != stub_sec->size)
10380 break;
10381
10382 /* Exit from this loop when no stubs have been added, and no stubs
10383 have changed size. */
10384 if (stub_sec == NULL)
10385 break;
10386
10387 /* Ask the linker to do its stuff. */
10388 (*htab->layout_sections_again) ();
10389 }
10390
10391 /* It would be nice to strip htab->brlt from the output if the
10392 section is empty, but it's too late. If we strip sections here,
10393 the dynamic symbol table is corrupted since the section symbol
10394 for the stripped section isn't written. */
10395
10396 return TRUE;
10397 }
10398
10399 /* Called after we have determined section placement. If sections
10400 move, we'll be called again. Provide a value for TOCstart. */
10401
10402 bfd_vma
10403 ppc64_elf_toc (bfd *obfd)
10404 {
10405 asection *s;
10406 bfd_vma TOCstart;
10407
10408 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10409 order. The TOC starts where the first of these sections starts. */
10410 s = bfd_get_section_by_name (obfd, ".got");
10411 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10412 s = bfd_get_section_by_name (obfd, ".toc");
10413 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10414 s = bfd_get_section_by_name (obfd, ".tocbss");
10415 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10416 s = bfd_get_section_by_name (obfd, ".plt");
10417 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10418 {
10419 /* This may happen for
10420 o references to TOC base (SYM@toc / TOC[tc0]) without a
10421 .toc directive
10422 o bad linker script
10423 o --gc-sections and empty TOC sections
10424
10425 FIXME: Warn user? */
10426
10427 /* Look for a likely section. We probably won't even be
10428 using TOCstart. */
10429 for (s = obfd->sections; s != NULL; s = s->next)
10430 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10431 | SEC_EXCLUDE))
10432 == (SEC_ALLOC | SEC_SMALL_DATA))
10433 break;
10434 if (s == NULL)
10435 for (s = obfd->sections; s != NULL; s = s->next)
10436 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
10437 == (SEC_ALLOC | SEC_SMALL_DATA))
10438 break;
10439 if (s == NULL)
10440 for (s = obfd->sections; s != NULL; s = s->next)
10441 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
10442 == SEC_ALLOC)
10443 break;
10444 if (s == NULL)
10445 for (s = obfd->sections; s != NULL; s = s->next)
10446 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
10447 break;
10448 }
10449
10450 TOCstart = 0;
10451 if (s != NULL)
10452 TOCstart = s->output_section->vma + s->output_offset;
10453
10454 return TOCstart;
10455 }
10456
10457 /* Build all the stubs associated with the current output file.
10458 The stubs are kept in a hash table attached to the main linker
10459 hash table. This function is called via gldelf64ppc_finish. */
10460
10461 bfd_boolean
10462 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
10463 struct bfd_link_info *info,
10464 char **stats)
10465 {
10466 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10467 asection *stub_sec;
10468 bfd_byte *p;
10469 int stub_sec_count = 0;
10470
10471 htab->emit_stub_syms = emit_stub_syms;
10472
10473 /* Allocate memory to hold the linker stubs. */
10474 for (stub_sec = htab->stub_bfd->sections;
10475 stub_sec != NULL;
10476 stub_sec = stub_sec->next)
10477 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10478 && stub_sec->size != 0)
10479 {
10480 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
10481 if (stub_sec->contents == NULL)
10482 return FALSE;
10483 /* We want to check that built size is the same as calculated
10484 size. rawsize is a convenient location to use. */
10485 stub_sec->rawsize = stub_sec->size;
10486 stub_sec->size = 0;
10487 }
10488
10489 if (htab->glink != NULL && htab->glink->size != 0)
10490 {
10491 unsigned int indx;
10492 bfd_vma plt0;
10493
10494 /* Build the .glink plt call stub. */
10495 if (htab->emit_stub_syms)
10496 {
10497 struct elf_link_hash_entry *h;
10498 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
10499 TRUE, FALSE, FALSE);
10500 if (h == NULL)
10501 return FALSE;
10502 if (h->root.type == bfd_link_hash_new)
10503 {
10504 h->root.type = bfd_link_hash_defined;
10505 h->root.u.def.section = htab->glink;
10506 h->root.u.def.value = 8;
10507 h->ref_regular = 1;
10508 h->def_regular = 1;
10509 h->ref_regular_nonweak = 1;
10510 h->forced_local = 1;
10511 h->non_elf = 0;
10512 }
10513 }
10514 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
10515 if (info->emitrelocations)
10516 {
10517 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
10518 if (r == NULL)
10519 return FALSE;
10520 r->r_offset = (htab->glink->output_offset
10521 + htab->glink->output_section->vma);
10522 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
10523 r->r_addend = plt0;
10524 }
10525 p = htab->glink->contents;
10526 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
10527 bfd_put_64 (htab->glink->owner, plt0, p);
10528 p += 8;
10529 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
10530 p += 4;
10531 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
10532 p += 4;
10533 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
10534 p += 4;
10535 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
10536 p += 4;
10537 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
10538 p += 4;
10539 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
10540 p += 4;
10541 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
10542 p += 4;
10543 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
10544 p += 4;
10545 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
10546 p += 4;
10547 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
10548 p += 4;
10549 bfd_put_32 (htab->glink->owner, BCTR, p);
10550 p += 4;
10551 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
10552 {
10553 bfd_put_32 (htab->glink->owner, NOP, p);
10554 p += 4;
10555 }
10556
10557 /* Build the .glink lazy link call stubs. */
10558 indx = 0;
10559 while (p < htab->glink->contents + htab->glink->size)
10560 {
10561 if (indx < 0x8000)
10562 {
10563 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
10564 p += 4;
10565 }
10566 else
10567 {
10568 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
10569 p += 4;
10570 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
10571 p += 4;
10572 }
10573 bfd_put_32 (htab->glink->owner,
10574 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
10575 indx++;
10576 p += 4;
10577 }
10578 htab->glink->rawsize = p - htab->glink->contents;
10579 }
10580
10581 if (htab->brlt->size != 0)
10582 {
10583 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
10584 htab->brlt->size);
10585 if (htab->brlt->contents == NULL)
10586 return FALSE;
10587 }
10588 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
10589 {
10590 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
10591 htab->relbrlt->size);
10592 if (htab->relbrlt->contents == NULL)
10593 return FALSE;
10594 }
10595
10596 /* Build the stubs as directed by the stub hash table. */
10597 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
10598
10599 if (htab->relbrlt != NULL)
10600 htab->relbrlt->reloc_count = 0;
10601
10602 for (stub_sec = htab->stub_bfd->sections;
10603 stub_sec != NULL;
10604 stub_sec = stub_sec->next)
10605 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10606 {
10607 stub_sec_count += 1;
10608 if (stub_sec->rawsize != stub_sec->size)
10609 break;
10610 }
10611
10612 if (stub_sec != NULL
10613 || htab->glink->rawsize != htab->glink->size)
10614 {
10615 htab->stub_error = TRUE;
10616 (*_bfd_error_handler) (_("stubs don't match calculated size"));
10617 }
10618
10619 if (htab->stub_error)
10620 return FALSE;
10621
10622 if (stats != NULL)
10623 {
10624 *stats = bfd_malloc (500);
10625 if (*stats == NULL)
10626 return FALSE;
10627
10628 sprintf (*stats, _("linker stubs in %u group%s\n"
10629 " branch %lu\n"
10630 " toc adjust %lu\n"
10631 " long branch %lu\n"
10632 " long toc adj %lu\n"
10633 " plt call %lu"),
10634 stub_sec_count,
10635 stub_sec_count == 1 ? "" : "s",
10636 htab->stub_count[ppc_stub_long_branch - 1],
10637 htab->stub_count[ppc_stub_long_branch_r2off - 1],
10638 htab->stub_count[ppc_stub_plt_branch - 1],
10639 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
10640 htab->stub_count[ppc_stub_plt_call - 1]);
10641 }
10642 return TRUE;
10643 }
10644
10645 /* This function undoes the changes made by add_symbol_adjust. */
10646
10647 static bfd_boolean
10648 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10649 {
10650 struct ppc_link_hash_entry *eh;
10651
10652 if (h->root.type == bfd_link_hash_indirect)
10653 return TRUE;
10654
10655 if (h->root.type == bfd_link_hash_warning)
10656 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10657
10658 eh = (struct ppc_link_hash_entry *) h;
10659 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
10660 return TRUE;
10661
10662 eh->elf.root.type = bfd_link_hash_undefined;
10663 return TRUE;
10664 }
10665
10666 void
10667 ppc64_elf_restore_symbols (struct bfd_link_info *info)
10668 {
10669 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10670 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
10671 }
10672
10673 /* What to do when ld finds relocations against symbols defined in
10674 discarded sections. */
10675
10676 static unsigned int
10677 ppc64_elf_action_discarded (asection *sec)
10678 {
10679 if (strcmp (".opd", sec->name) == 0)
10680 return 0;
10681
10682 if (strcmp (".toc", sec->name) == 0)
10683 return 0;
10684
10685 if (strcmp (".toc1", sec->name) == 0)
10686 return 0;
10687
10688 return _bfd_elf_default_action_discarded (sec);
10689 }
10690
10691 /* The RELOCATE_SECTION function is called by the ELF backend linker
10692 to handle the relocations for a section.
10693
10694 The relocs are always passed as Rela structures; if the section
10695 actually uses Rel structures, the r_addend field will always be
10696 zero.
10697
10698 This function is responsible for adjust the section contents as
10699 necessary, and (if using Rela relocs and generating a
10700 relocatable output file) adjusting the reloc addend as
10701 necessary.
10702
10703 This function does not have to worry about setting the reloc
10704 address or the reloc symbol index.
10705
10706 LOCAL_SYMS is a pointer to the swapped in local symbols.
10707
10708 LOCAL_SECTIONS is an array giving the section in the input file
10709 corresponding to the st_shndx field of each local symbol.
10710
10711 The global hash table entry for the global symbols can be found
10712 via elf_sym_hashes (input_bfd).
10713
10714 When generating relocatable output, this function must handle
10715 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
10716 going to be the section symbol corresponding to the output
10717 section, which means that the addend must be adjusted
10718 accordingly. */
10719
10720 static bfd_boolean
10721 ppc64_elf_relocate_section (bfd *output_bfd,
10722 struct bfd_link_info *info,
10723 bfd *input_bfd,
10724 asection *input_section,
10725 bfd_byte *contents,
10726 Elf_Internal_Rela *relocs,
10727 Elf_Internal_Sym *local_syms,
10728 asection **local_sections)
10729 {
10730 struct ppc_link_hash_table *htab;
10731 Elf_Internal_Shdr *symtab_hdr;
10732 struct elf_link_hash_entry **sym_hashes;
10733 Elf_Internal_Rela *rel;
10734 Elf_Internal_Rela *relend;
10735 Elf_Internal_Rela outrel;
10736 bfd_byte *loc;
10737 struct got_entry **local_got_ents;
10738 bfd_vma TOCstart;
10739 bfd_boolean ret = TRUE;
10740 bfd_boolean is_opd;
10741 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
10742 bfd_boolean is_power4 = FALSE;
10743 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
10744
10745 /* Initialize howto table if needed. */
10746 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
10747 ppc_howto_init ();
10748
10749 htab = ppc_hash_table (info);
10750
10751 /* Don't relocate stub sections. */
10752 if (input_section->owner == htab->stub_bfd)
10753 return TRUE;
10754
10755 BFD_ASSERT (is_ppc64_elf (input_bfd));
10756
10757 local_got_ents = elf_local_got_ents (input_bfd);
10758 TOCstart = elf_gp (output_bfd);
10759 symtab_hdr = &elf_symtab_hdr (input_bfd);
10760 sym_hashes = elf_sym_hashes (input_bfd);
10761 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
10762
10763 rel = relocs;
10764 relend = relocs + input_section->reloc_count;
10765 for (; rel < relend; rel++)
10766 {
10767 enum elf_ppc64_reloc_type r_type;
10768 bfd_vma addend, orig_addend;
10769 bfd_reloc_status_type r;
10770 Elf_Internal_Sym *sym;
10771 asection *sec;
10772 struct elf_link_hash_entry *h_elf;
10773 struct ppc_link_hash_entry *h;
10774 struct ppc_link_hash_entry *fdh;
10775 const char *sym_name;
10776 unsigned long r_symndx, toc_symndx;
10777 bfd_vma toc_addend;
10778 char tls_mask, tls_gd, tls_type;
10779 char sym_type;
10780 bfd_vma relocation;
10781 bfd_boolean unresolved_reloc;
10782 bfd_boolean warned;
10783 unsigned long insn, mask;
10784 struct ppc_stub_hash_entry *stub_entry;
10785 bfd_vma max_br_offset;
10786 bfd_vma from;
10787
10788 r_type = ELF64_R_TYPE (rel->r_info);
10789 r_symndx = ELF64_R_SYM (rel->r_info);
10790
10791 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10792 symbol of the previous ADDR64 reloc. The symbol gives us the
10793 proper TOC base to use. */
10794 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10795 && rel != relocs
10796 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10797 && is_opd)
10798 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10799
10800 sym = NULL;
10801 sec = NULL;
10802 h_elf = NULL;
10803 sym_name = NULL;
10804 unresolved_reloc = FALSE;
10805 warned = FALSE;
10806 orig_addend = rel->r_addend;
10807
10808 if (r_symndx < symtab_hdr->sh_info)
10809 {
10810 /* It's a local symbol. */
10811 struct _opd_sec_data *opd;
10812
10813 sym = local_syms + r_symndx;
10814 sec = local_sections[r_symndx];
10815 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10816 sym_type = ELF64_ST_TYPE (sym->st_info);
10817 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10818 opd = get_opd_info (sec);
10819 if (opd != NULL && opd->adjust != NULL)
10820 {
10821 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10822 if (adjust == -1)
10823 relocation = 0;
10824 else
10825 {
10826 /* If this is a relocation against the opd section sym
10827 and we have edited .opd, adjust the reloc addend so
10828 that ld -r and ld --emit-relocs output is correct.
10829 If it is a reloc against some other .opd symbol,
10830 then the symbol value will be adjusted later. */
10831 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10832 rel->r_addend += adjust;
10833 else
10834 relocation += adjust;
10835 }
10836 }
10837 }
10838 else
10839 {
10840 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10841 r_symndx, symtab_hdr, sym_hashes,
10842 h_elf, sec, relocation,
10843 unresolved_reloc, warned);
10844 sym_name = h_elf->root.root.string;
10845 sym_type = h_elf->type;
10846 }
10847 h = (struct ppc_link_hash_entry *) h_elf;
10848
10849 if (sec != NULL && elf_discarded_section (sec))
10850 {
10851 /* For relocs against symbols from removed linkonce sections,
10852 or sections discarded by a linker script, we just want the
10853 section contents zeroed. Avoid any special processing. */
10854 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10855 contents + rel->r_offset);
10856 rel->r_info = 0;
10857 rel->r_addend = 0;
10858 continue;
10859 }
10860
10861 if (info->relocatable)
10862 continue;
10863
10864 /* TLS optimizations. Replace instruction sequences and relocs
10865 based on information we collected in tls_optimize. We edit
10866 RELOCS so that --emit-relocs will output something sensible
10867 for the final instruction stream. */
10868 tls_mask = 0;
10869 tls_gd = 0;
10870 toc_symndx = 0;
10871 if (h != NULL)
10872 tls_mask = h->tls_mask;
10873 else if (local_got_ents != NULL)
10874 {
10875 struct plt_entry **local_plt = (struct plt_entry **)
10876 (local_got_ents + symtab_hdr->sh_info);
10877 char *lgot_masks = (char *)
10878 (local_plt + symtab_hdr->sh_info);
10879 tls_mask = lgot_masks[r_symndx];
10880 }
10881 if (tls_mask == 0
10882 && (r_type == R_PPC64_TLS
10883 || r_type == R_PPC64_TLSGD
10884 || r_type == R_PPC64_TLSLD))
10885 {
10886 /* Check for toc tls entries. */
10887 char *toc_tls;
10888
10889 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10890 &local_syms, rel, input_bfd))
10891 return FALSE;
10892
10893 if (toc_tls)
10894 tls_mask = *toc_tls;
10895 }
10896
10897 /* Check that tls relocs are used with tls syms, and non-tls
10898 relocs are used with non-tls syms. */
10899 if (r_symndx != 0
10900 && r_type != R_PPC64_NONE
10901 && (h == NULL
10902 || h->elf.root.type == bfd_link_hash_defined
10903 || h->elf.root.type == bfd_link_hash_defweak)
10904 && (IS_PPC64_TLS_RELOC (r_type)
10905 != (sym_type == STT_TLS
10906 || (sym_type == STT_SECTION
10907 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
10908 {
10909 if (tls_mask != 0
10910 && (r_type == R_PPC64_TLS
10911 || r_type == R_PPC64_TLSGD
10912 || r_type == R_PPC64_TLSLD))
10913 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10914 ;
10915 else
10916 (*_bfd_error_handler)
10917 (!IS_PPC64_TLS_RELOC (r_type)
10918 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10919 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10920 input_bfd,
10921 input_section,
10922 (long) rel->r_offset,
10923 ppc64_elf_howto_table[r_type]->name,
10924 sym_name);
10925 }
10926
10927 /* Ensure reloc mapping code below stays sane. */
10928 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10929 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10930 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10931 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10932 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10933 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10934 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10935 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10936 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10937 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10938 abort ();
10939
10940 switch (r_type)
10941 {
10942 default:
10943 break;
10944
10945 case R_PPC64_TOC16:
10946 case R_PPC64_TOC16_LO:
10947 case R_PPC64_TOC16_DS:
10948 case R_PPC64_TOC16_LO_DS:
10949 {
10950 /* Check for toc tls entries. */
10951 char *toc_tls;
10952 int retval;
10953
10954 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10955 &local_syms, rel, input_bfd);
10956 if (retval == 0)
10957 return FALSE;
10958
10959 if (toc_tls)
10960 {
10961 tls_mask = *toc_tls;
10962 if (r_type == R_PPC64_TOC16_DS
10963 || r_type == R_PPC64_TOC16_LO_DS)
10964 {
10965 if (tls_mask != 0
10966 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10967 goto toctprel;
10968 }
10969 else
10970 {
10971 /* If we found a GD reloc pair, then we might be
10972 doing a GD->IE transition. */
10973 if (retval == 2)
10974 {
10975 tls_gd = TLS_TPRELGD;
10976 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10977 goto tls_ldgd_opt;
10978 }
10979 else if (retval == 3)
10980 {
10981 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10982 goto tls_ldgd_opt;
10983 }
10984 }
10985 }
10986 }
10987 break;
10988
10989 case R_PPC64_GOT_TPREL16_DS:
10990 case R_PPC64_GOT_TPREL16_LO_DS:
10991 if (tls_mask != 0
10992 && (tls_mask & TLS_TPREL) == 0)
10993 {
10994 toctprel:
10995 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10996 insn &= 31 << 21;
10997 insn |= 0x3c0d0000; /* addis 0,13,0 */
10998 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10999 r_type = R_PPC64_TPREL16_HA;
11000 if (toc_symndx != 0)
11001 {
11002 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11003 rel->r_addend = toc_addend;
11004 /* We changed the symbol. Start over in order to
11005 get h, sym, sec etc. right. */
11006 rel--;
11007 continue;
11008 }
11009 else
11010 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11011 }
11012 break;
11013
11014 case R_PPC64_TLS:
11015 if (tls_mask != 0
11016 && (tls_mask & TLS_TPREL) == 0)
11017 {
11018 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11019 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11020 if (insn == 0)
11021 abort ();
11022 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11023 /* Was PPC64_TLS which sits on insn boundary, now
11024 PPC64_TPREL16_LO which is at low-order half-word. */
11025 rel->r_offset += d_offset;
11026 r_type = R_PPC64_TPREL16_LO;
11027 if (toc_symndx != 0)
11028 {
11029 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11030 rel->r_addend = toc_addend;
11031 /* We changed the symbol. Start over in order to
11032 get h, sym, sec etc. right. */
11033 rel--;
11034 continue;
11035 }
11036 else
11037 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11038 }
11039 break;
11040
11041 case R_PPC64_GOT_TLSGD16_HI:
11042 case R_PPC64_GOT_TLSGD16_HA:
11043 tls_gd = TLS_TPRELGD;
11044 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11045 goto tls_gdld_hi;
11046 break;
11047
11048 case R_PPC64_GOT_TLSLD16_HI:
11049 case R_PPC64_GOT_TLSLD16_HA:
11050 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11051 {
11052 tls_gdld_hi:
11053 if ((tls_mask & tls_gd) != 0)
11054 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11055 + R_PPC64_GOT_TPREL16_DS);
11056 else
11057 {
11058 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11059 rel->r_offset -= d_offset;
11060 r_type = R_PPC64_NONE;
11061 }
11062 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11063 }
11064 break;
11065
11066 case R_PPC64_GOT_TLSGD16:
11067 case R_PPC64_GOT_TLSGD16_LO:
11068 tls_gd = TLS_TPRELGD;
11069 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11070 goto tls_ldgd_opt;
11071 break;
11072
11073 case R_PPC64_GOT_TLSLD16:
11074 case R_PPC64_GOT_TLSLD16_LO:
11075 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11076 {
11077 unsigned int insn1, insn2, insn3;
11078 bfd_vma offset;
11079
11080 tls_ldgd_opt:
11081 offset = (bfd_vma) -1;
11082 /* If not using the newer R_PPC64_TLSGD/LD to mark
11083 __tls_get_addr calls, we must trust that the call
11084 stays with its arg setup insns, ie. that the next
11085 reloc is the __tls_get_addr call associated with
11086 the current reloc. Edit both insns. */
11087 if (input_section->has_tls_get_addr_call
11088 && rel + 1 < relend
11089 && branch_reloc_hash_match (input_bfd, rel + 1,
11090 htab->tls_get_addr,
11091 htab->tls_get_addr_fd))
11092 offset = rel[1].r_offset;
11093 if ((tls_mask & tls_gd) != 0)
11094 {
11095 /* IE */
11096 insn1 = bfd_get_32 (output_bfd,
11097 contents + rel->r_offset - d_offset);
11098 insn1 &= (1 << 26) - (1 << 2);
11099 insn1 |= 58 << 26; /* ld */
11100 insn2 = 0x7c636a14; /* add 3,3,13 */
11101 if (offset != (bfd_vma) -1)
11102 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11103 if ((tls_mask & TLS_EXPLICIT) == 0)
11104 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11105 + R_PPC64_GOT_TPREL16_DS);
11106 else
11107 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11108 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11109 }
11110 else
11111 {
11112 /* LE */
11113 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11114 insn2 = 0x38630000; /* addi 3,3,0 */
11115 if (tls_gd == 0)
11116 {
11117 /* Was an LD reloc. */
11118 if (toc_symndx)
11119 sec = local_sections[toc_symndx];
11120 for (r_symndx = 0;
11121 r_symndx < symtab_hdr->sh_info;
11122 r_symndx++)
11123 if (local_sections[r_symndx] == sec)
11124 break;
11125 if (r_symndx >= symtab_hdr->sh_info)
11126 r_symndx = 0;
11127 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11128 if (r_symndx != 0)
11129 rel->r_addend -= (local_syms[r_symndx].st_value
11130 + sec->output_offset
11131 + sec->output_section->vma);
11132 }
11133 else if (toc_symndx != 0)
11134 {
11135 r_symndx = toc_symndx;
11136 rel->r_addend = toc_addend;
11137 }
11138 r_type = R_PPC64_TPREL16_HA;
11139 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11140 if (offset != (bfd_vma) -1)
11141 {
11142 rel[1].r_info = ELF64_R_INFO (r_symndx,
11143 R_PPC64_TPREL16_LO);
11144 rel[1].r_offset = offset + d_offset;
11145 rel[1].r_addend = rel->r_addend;
11146 }
11147 }
11148 bfd_put_32 (output_bfd, insn1,
11149 contents + rel->r_offset - d_offset);
11150 if (offset != (bfd_vma) -1)
11151 {
11152 insn3 = bfd_get_32 (output_bfd,
11153 contents + offset + 4);
11154 if (insn3 == NOP
11155 || insn3 == CROR_151515 || insn3 == CROR_313131)
11156 {
11157 rel[1].r_offset += 4;
11158 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11159 insn2 = NOP;
11160 }
11161 bfd_put_32 (output_bfd, insn2, contents + offset);
11162 }
11163 if ((tls_mask & tls_gd) == 0
11164 && (tls_gd == 0 || toc_symndx != 0))
11165 {
11166 /* We changed the symbol. Start over in order
11167 to get h, sym, sec etc. right. */
11168 rel--;
11169 continue;
11170 }
11171 }
11172 break;
11173
11174 case R_PPC64_TLSGD:
11175 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11176 {
11177 unsigned int insn2, insn3;
11178 bfd_vma offset = rel->r_offset;
11179
11180 if ((tls_mask & TLS_TPRELGD) != 0)
11181 {
11182 /* IE */
11183 r_type = R_PPC64_NONE;
11184 insn2 = 0x7c636a14; /* add 3,3,13 */
11185 }
11186 else
11187 {
11188 /* LE */
11189 if (toc_symndx != 0)
11190 {
11191 r_symndx = toc_symndx;
11192 rel->r_addend = toc_addend;
11193 }
11194 r_type = R_PPC64_TPREL16_LO;
11195 rel->r_offset = offset + d_offset;
11196 insn2 = 0x38630000; /* addi 3,3,0 */
11197 }
11198 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11199 /* Zap the reloc on the _tls_get_addr call too. */
11200 BFD_ASSERT (offset == rel[1].r_offset);
11201 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11202 insn3 = bfd_get_32 (output_bfd,
11203 contents + offset + 4);
11204 if (insn3 == NOP
11205 || insn3 == CROR_151515 || insn3 == CROR_313131)
11206 {
11207 rel->r_offset += 4;
11208 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11209 insn2 = NOP;
11210 }
11211 bfd_put_32 (output_bfd, insn2, contents + offset);
11212 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11213 {
11214 rel--;
11215 continue;
11216 }
11217 }
11218 break;
11219
11220 case R_PPC64_TLSLD:
11221 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11222 {
11223 unsigned int insn2, insn3;
11224 bfd_vma offset = rel->r_offset;
11225
11226 if (toc_symndx)
11227 sec = local_sections[toc_symndx];
11228 for (r_symndx = 0;
11229 r_symndx < symtab_hdr->sh_info;
11230 r_symndx++)
11231 if (local_sections[r_symndx] == sec)
11232 break;
11233 if (r_symndx >= symtab_hdr->sh_info)
11234 r_symndx = 0;
11235 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11236 if (r_symndx != 0)
11237 rel->r_addend -= (local_syms[r_symndx].st_value
11238 + sec->output_offset
11239 + sec->output_section->vma);
11240
11241 r_type = R_PPC64_TPREL16_LO;
11242 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11243 rel->r_offset = offset + d_offset;
11244 /* Zap the reloc on the _tls_get_addr call too. */
11245 BFD_ASSERT (offset == rel[1].r_offset);
11246 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11247 insn2 = 0x38630000; /* addi 3,3,0 */
11248 insn3 = bfd_get_32 (output_bfd,
11249 contents + offset + 4);
11250 if (insn3 == NOP
11251 || insn3 == CROR_151515 || insn3 == CROR_313131)
11252 {
11253 rel->r_offset += 4;
11254 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11255 insn2 = NOP;
11256 }
11257 bfd_put_32 (output_bfd, insn2, contents + offset);
11258 rel--;
11259 continue;
11260 }
11261 break;
11262
11263 case R_PPC64_DTPMOD64:
11264 if (rel + 1 < relend
11265 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11266 && rel[1].r_offset == rel->r_offset + 8)
11267 {
11268 if ((tls_mask & TLS_GD) == 0)
11269 {
11270 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11271 if ((tls_mask & TLS_TPRELGD) != 0)
11272 r_type = R_PPC64_TPREL64;
11273 else
11274 {
11275 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11276 r_type = R_PPC64_NONE;
11277 }
11278 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11279 }
11280 }
11281 else
11282 {
11283 if ((tls_mask & TLS_LD) == 0)
11284 {
11285 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11286 r_type = R_PPC64_NONE;
11287 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11288 }
11289 }
11290 break;
11291
11292 case R_PPC64_TPREL64:
11293 if ((tls_mask & TLS_TPREL) == 0)
11294 {
11295 r_type = R_PPC64_NONE;
11296 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11297 }
11298 break;
11299 }
11300
11301 /* Handle other relocations that tweak non-addend part of insn. */
11302 insn = 0;
11303 max_br_offset = 1 << 25;
11304 addend = rel->r_addend;
11305 switch (r_type)
11306 {
11307 default:
11308 break;
11309
11310 /* Branch taken prediction relocations. */
11311 case R_PPC64_ADDR14_BRTAKEN:
11312 case R_PPC64_REL14_BRTAKEN:
11313 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11314 /* Fall thru. */
11315
11316 /* Branch not taken prediction relocations. */
11317 case R_PPC64_ADDR14_BRNTAKEN:
11318 case R_PPC64_REL14_BRNTAKEN:
11319 insn |= bfd_get_32 (output_bfd,
11320 contents + rel->r_offset) & ~(0x01 << 21);
11321 /* Fall thru. */
11322
11323 case R_PPC64_REL14:
11324 max_br_offset = 1 << 15;
11325 /* Fall thru. */
11326
11327 case R_PPC64_REL24:
11328 /* Calls to functions with a different TOC, such as calls to
11329 shared objects, need to alter the TOC pointer. This is
11330 done using a linkage stub. A REL24 branching to these
11331 linkage stubs needs to be followed by a nop, as the nop
11332 will be replaced with an instruction to restore the TOC
11333 base pointer. */
11334 stub_entry = NULL;
11335 fdh = h;
11336 if (h != NULL
11337 && h->oh != NULL
11338 && h->oh->is_func_descriptor)
11339 fdh = ppc_follow_link (h->oh);
11340 if (((fdh != NULL
11341 && fdh->elf.plt.plist != NULL)
11342 || (sec != NULL
11343 && sec->output_section != NULL
11344 && sec->id <= htab->top_id
11345 && (htab->stub_group[sec->id].toc_off
11346 != htab->stub_group[input_section->id].toc_off))
11347 || (h == NULL
11348 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11349 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
11350 rel, htab)) != NULL
11351 && (stub_entry->stub_type == ppc_stub_plt_call
11352 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11353 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11354 {
11355 bfd_boolean can_plt_call = FALSE;
11356
11357 if (rel->r_offset + 8 <= input_section->size)
11358 {
11359 unsigned long nop;
11360 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11361 if (nop == NOP
11362 || nop == CROR_151515 || nop == CROR_313131)
11363 {
11364 if (h != NULL
11365 && (h == htab->tls_get_addr_fd
11366 || h == htab->tls_get_addr)
11367 && !htab->no_tls_get_addr_opt)
11368 {
11369 /* Special stub used, leave nop alone. */
11370 }
11371 else
11372 bfd_put_32 (input_bfd, LD_R2_40R1,
11373 contents + rel->r_offset + 4);
11374 can_plt_call = TRUE;
11375 }
11376 }
11377
11378 if (!can_plt_call)
11379 {
11380 if (stub_entry->stub_type == ppc_stub_plt_call)
11381 {
11382 /* If this is a plain branch rather than a branch
11383 and link, don't require a nop. However, don't
11384 allow tail calls in a shared library as they
11385 will result in r2 being corrupted. */
11386 unsigned long br;
11387 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
11388 if (info->executable && (br & 1) == 0)
11389 can_plt_call = TRUE;
11390 else
11391 stub_entry = NULL;
11392 }
11393 else if (h != NULL
11394 && strcmp (h->elf.root.root.string,
11395 ".__libc_start_main") == 0)
11396 {
11397 /* Allow crt1 branch to go via a toc adjusting stub. */
11398 can_plt_call = TRUE;
11399 }
11400 else
11401 {
11402 if (strcmp (input_section->output_section->name,
11403 ".init") == 0
11404 || strcmp (input_section->output_section->name,
11405 ".fini") == 0)
11406 (*_bfd_error_handler)
11407 (_("%B(%A+0x%lx): automatic multiple TOCs "
11408 "not supported using your crt files; "
11409 "recompile with -mminimal-toc or upgrade gcc"),
11410 input_bfd,
11411 input_section,
11412 (long) rel->r_offset);
11413 else
11414 (*_bfd_error_handler)
11415 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
11416 "does not allow automatic multiple TOCs; "
11417 "recompile with -mminimal-toc or "
11418 "-fno-optimize-sibling-calls, "
11419 "or make `%s' extern"),
11420 input_bfd,
11421 input_section,
11422 (long) rel->r_offset,
11423 sym_name,
11424 sym_name);
11425 bfd_set_error (bfd_error_bad_value);
11426 ret = FALSE;
11427 }
11428 }
11429
11430 if (can_plt_call
11431 && stub_entry->stub_type == ppc_stub_plt_call)
11432 unresolved_reloc = FALSE;
11433 }
11434
11435 if (stub_entry == NULL
11436 && get_opd_info (sec) != NULL)
11437 {
11438 /* The branch destination is the value of the opd entry. */
11439 bfd_vma off = (relocation + addend
11440 - sec->output_section->vma
11441 - sec->output_offset);
11442 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
11443 if (dest != (bfd_vma) -1)
11444 {
11445 relocation = dest;
11446 addend = 0;
11447 }
11448 }
11449
11450 /* If the branch is out of reach we ought to have a long
11451 branch stub. */
11452 from = (rel->r_offset
11453 + input_section->output_offset
11454 + input_section->output_section->vma);
11455
11456 if (stub_entry == NULL
11457 && (relocation + addend - from + max_br_offset
11458 >= 2 * max_br_offset)
11459 && r_type != R_PPC64_ADDR14_BRTAKEN
11460 && r_type != R_PPC64_ADDR14_BRNTAKEN)
11461 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
11462 htab);
11463
11464 if (stub_entry != NULL)
11465 {
11466 /* Munge up the value and addend so that we call the stub
11467 rather than the procedure directly. */
11468 relocation = (stub_entry->stub_offset
11469 + stub_entry->stub_sec->output_offset
11470 + stub_entry->stub_sec->output_section->vma);
11471 addend = 0;
11472 }
11473
11474 if (insn != 0)
11475 {
11476 if (is_power4)
11477 {
11478 /* Set 'a' bit. This is 0b00010 in BO field for branch
11479 on CR(BI) insns (BO == 001at or 011at), and 0b01000
11480 for branch on CTR insns (BO == 1a00t or 1a01t). */
11481 if ((insn & (0x14 << 21)) == (0x04 << 21))
11482 insn |= 0x02 << 21;
11483 else if ((insn & (0x14 << 21)) == (0x10 << 21))
11484 insn |= 0x08 << 21;
11485 else
11486 break;
11487 }
11488 else
11489 {
11490 /* Invert 'y' bit if not the default. */
11491 if ((bfd_signed_vma) (relocation + addend - from) < 0)
11492 insn ^= 0x01 << 21;
11493 }
11494
11495 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11496 }
11497
11498 /* NOP out calls to undefined weak functions.
11499 We can thus call a weak function without first
11500 checking whether the function is defined. */
11501 else if (h != NULL
11502 && h->elf.root.type == bfd_link_hash_undefweak
11503 && r_type == R_PPC64_REL24
11504 && relocation == 0
11505 && addend == 0)
11506 {
11507 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11508 continue;
11509 }
11510 break;
11511 }
11512
11513 /* Set `addend'. */
11514 tls_type = 0;
11515 switch (r_type)
11516 {
11517 default:
11518 (*_bfd_error_handler)
11519 (_("%B: unknown relocation type %d for symbol %s"),
11520 input_bfd, (int) r_type, sym_name);
11521
11522 bfd_set_error (bfd_error_bad_value);
11523 ret = FALSE;
11524 continue;
11525
11526 case R_PPC64_NONE:
11527 case R_PPC64_TLS:
11528 case R_PPC64_TLSGD:
11529 case R_PPC64_TLSLD:
11530 case R_PPC64_GNU_VTINHERIT:
11531 case R_PPC64_GNU_VTENTRY:
11532 continue;
11533
11534 /* GOT16 relocations. Like an ADDR16 using the symbol's
11535 address in the GOT as relocation value instead of the
11536 symbol's value itself. Also, create a GOT entry for the
11537 symbol and put the symbol value there. */
11538 case R_PPC64_GOT_TLSGD16:
11539 case R_PPC64_GOT_TLSGD16_LO:
11540 case R_PPC64_GOT_TLSGD16_HI:
11541 case R_PPC64_GOT_TLSGD16_HA:
11542 tls_type = TLS_TLS | TLS_GD;
11543 goto dogot;
11544
11545 case R_PPC64_GOT_TLSLD16:
11546 case R_PPC64_GOT_TLSLD16_LO:
11547 case R_PPC64_GOT_TLSLD16_HI:
11548 case R_PPC64_GOT_TLSLD16_HA:
11549 tls_type = TLS_TLS | TLS_LD;
11550 goto dogot;
11551
11552 case R_PPC64_GOT_TPREL16_DS:
11553 case R_PPC64_GOT_TPREL16_LO_DS:
11554 case R_PPC64_GOT_TPREL16_HI:
11555 case R_PPC64_GOT_TPREL16_HA:
11556 tls_type = TLS_TLS | TLS_TPREL;
11557 goto dogot;
11558
11559 case R_PPC64_GOT_DTPREL16_DS:
11560 case R_PPC64_GOT_DTPREL16_LO_DS:
11561 case R_PPC64_GOT_DTPREL16_HI:
11562 case R_PPC64_GOT_DTPREL16_HA:
11563 tls_type = TLS_TLS | TLS_DTPREL;
11564 goto dogot;
11565
11566 case R_PPC64_GOT16:
11567 case R_PPC64_GOT16_LO:
11568 case R_PPC64_GOT16_HI:
11569 case R_PPC64_GOT16_HA:
11570 case R_PPC64_GOT16_DS:
11571 case R_PPC64_GOT16_LO_DS:
11572 dogot:
11573 {
11574 /* Relocation is to the entry for this symbol in the global
11575 offset table. */
11576 asection *got;
11577 bfd_vma *offp;
11578 bfd_vma off;
11579 unsigned long indx = 0;
11580
11581 if (tls_type == (TLS_TLS | TLS_LD)
11582 && (h == NULL
11583 || !h->elf.def_dynamic))
11584 offp = &ppc64_tlsld_got (input_bfd)->offset;
11585 else
11586 {
11587 struct got_entry *ent;
11588
11589 if (h != NULL)
11590 {
11591 bfd_boolean dyn = htab->elf.dynamic_sections_created;
11592 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
11593 &h->elf)
11594 || (info->shared
11595 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
11596 /* This is actually a static link, or it is a
11597 -Bsymbolic link and the symbol is defined
11598 locally, or the symbol was forced to be local
11599 because of a version file. */
11600 ;
11601 else
11602 {
11603 indx = h->elf.dynindx;
11604 unresolved_reloc = FALSE;
11605 }
11606 ent = h->elf.got.glist;
11607 }
11608 else
11609 {
11610 if (local_got_ents == NULL)
11611 abort ();
11612 ent = local_got_ents[r_symndx];
11613 }
11614
11615 for (; ent != NULL; ent = ent->next)
11616 if (ent->addend == orig_addend
11617 && ent->owner == input_bfd
11618 && ent->tls_type == tls_type)
11619 break;
11620 if (ent == NULL)
11621 abort ();
11622 offp = &ent->got.offset;
11623 }
11624
11625 got = ppc64_elf_tdata (input_bfd)->got;
11626 if (got == NULL)
11627 abort ();
11628
11629 /* The offset must always be a multiple of 8. We use the
11630 least significant bit to record whether we have already
11631 processed this entry. */
11632 off = *offp;
11633 if ((off & 1) != 0)
11634 off &= ~1;
11635 else
11636 {
11637 /* Generate relocs for the dynamic linker, except in
11638 the case of TLSLD where we'll use one entry per
11639 module. */
11640 asection *relgot;
11641 bfd_boolean ifunc;
11642
11643 *offp = off | 1;
11644 relgot = NULL;
11645 ifunc = (h != NULL
11646 ? h->elf.type == STT_GNU_IFUNC
11647 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
11648 if ((info->shared || indx != 0)
11649 && (offp == &ppc64_tlsld_got (input_bfd)->offset
11650 || h == NULL
11651 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11652 || h->elf.root.type != bfd_link_hash_undefweak))
11653 relgot = ppc64_elf_tdata (input_bfd)->relgot;
11654 else if (ifunc)
11655 relgot = htab->reliplt;
11656 if (relgot != NULL)
11657 {
11658 outrel.r_offset = (got->output_section->vma
11659 + got->output_offset
11660 + off);
11661 outrel.r_addend = addend;
11662 if (tls_type & (TLS_LD | TLS_GD))
11663 {
11664 outrel.r_addend = 0;
11665 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
11666 if (tls_type == (TLS_TLS | TLS_GD))
11667 {
11668 loc = relgot->contents;
11669 loc += (relgot->reloc_count++
11670 * sizeof (Elf64_External_Rela));
11671 bfd_elf64_swap_reloca_out (output_bfd,
11672 &outrel, loc);
11673 outrel.r_offset += 8;
11674 outrel.r_addend = addend;
11675 outrel.r_info
11676 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11677 }
11678 }
11679 else if (tls_type == (TLS_TLS | TLS_DTPREL))
11680 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11681 else if (tls_type == (TLS_TLS | TLS_TPREL))
11682 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
11683 else if (indx != 0)
11684 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
11685 else
11686 {
11687 if (ifunc)
11688 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11689 else
11690 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11691
11692 /* Write the .got section contents for the sake
11693 of prelink. */
11694 loc = got->contents + off;
11695 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
11696 loc);
11697 }
11698
11699 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
11700 {
11701 outrel.r_addend += relocation;
11702 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
11703 outrel.r_addend -= htab->elf.tls_sec->vma;
11704 }
11705 loc = relgot->contents;
11706 loc += (relgot->reloc_count++
11707 * sizeof (Elf64_External_Rela));
11708 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11709 }
11710
11711 /* Init the .got section contents here if we're not
11712 emitting a reloc. */
11713 else
11714 {
11715 relocation += addend;
11716 if (tls_type == (TLS_TLS | TLS_LD))
11717 relocation = 1;
11718 else if (tls_type != 0)
11719 {
11720 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
11721 if (tls_type == (TLS_TLS | TLS_TPREL))
11722 relocation += DTP_OFFSET - TP_OFFSET;
11723
11724 if (tls_type == (TLS_TLS | TLS_GD))
11725 {
11726 bfd_put_64 (output_bfd, relocation,
11727 got->contents + off + 8);
11728 relocation = 1;
11729 }
11730 }
11731
11732 bfd_put_64 (output_bfd, relocation,
11733 got->contents + off);
11734 }
11735 }
11736
11737 if (off >= (bfd_vma) -2)
11738 abort ();
11739
11740 relocation = got->output_offset + off;
11741
11742 /* TOC base (r2) is TOC start plus 0x8000. */
11743 addend = -TOC_BASE_OFF;
11744 }
11745 break;
11746
11747 case R_PPC64_PLT16_HA:
11748 case R_PPC64_PLT16_HI:
11749 case R_PPC64_PLT16_LO:
11750 case R_PPC64_PLT32:
11751 case R_PPC64_PLT64:
11752 /* Relocation is to the entry for this symbol in the
11753 procedure linkage table. */
11754
11755 /* Resolve a PLT reloc against a local symbol directly,
11756 without using the procedure linkage table. */
11757 if (h == NULL)
11758 break;
11759
11760 /* It's possible that we didn't make a PLT entry for this
11761 symbol. This happens when statically linking PIC code,
11762 or when using -Bsymbolic. Go find a match if there is a
11763 PLT entry. */
11764 if (htab->plt != NULL)
11765 {
11766 struct plt_entry *ent;
11767 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
11768 if (ent->addend == orig_addend
11769 && ent->plt.offset != (bfd_vma) -1)
11770 {
11771 relocation = (htab->plt->output_section->vma
11772 + htab->plt->output_offset
11773 + ent->plt.offset);
11774 unresolved_reloc = FALSE;
11775 }
11776 }
11777 break;
11778
11779 case R_PPC64_TOC:
11780 /* Relocation value is TOC base. */
11781 relocation = TOCstart;
11782 if (r_symndx == 0)
11783 relocation += htab->stub_group[input_section->id].toc_off;
11784 else if (unresolved_reloc)
11785 ;
11786 else if (sec != NULL && sec->id <= htab->top_id)
11787 relocation += htab->stub_group[sec->id].toc_off;
11788 else
11789 unresolved_reloc = TRUE;
11790 goto dodyn;
11791
11792 /* TOC16 relocs. We want the offset relative to the TOC base,
11793 which is the address of the start of the TOC plus 0x8000.
11794 The TOC consists of sections .got, .toc, .tocbss, and .plt,
11795 in this order. */
11796 case R_PPC64_TOC16:
11797 case R_PPC64_TOC16_LO:
11798 case R_PPC64_TOC16_HI:
11799 case R_PPC64_TOC16_DS:
11800 case R_PPC64_TOC16_LO_DS:
11801 case R_PPC64_TOC16_HA:
11802 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
11803 break;
11804
11805 /* Relocate against the beginning of the section. */
11806 case R_PPC64_SECTOFF:
11807 case R_PPC64_SECTOFF_LO:
11808 case R_PPC64_SECTOFF_HI:
11809 case R_PPC64_SECTOFF_DS:
11810 case R_PPC64_SECTOFF_LO_DS:
11811 case R_PPC64_SECTOFF_HA:
11812 if (sec != NULL)
11813 addend -= sec->output_section->vma;
11814 break;
11815
11816 case R_PPC64_REL16:
11817 case R_PPC64_REL16_LO:
11818 case R_PPC64_REL16_HI:
11819 case R_PPC64_REL16_HA:
11820 break;
11821
11822 case R_PPC64_REL14:
11823 case R_PPC64_REL14_BRNTAKEN:
11824 case R_PPC64_REL14_BRTAKEN:
11825 case R_PPC64_REL24:
11826 break;
11827
11828 case R_PPC64_TPREL16:
11829 case R_PPC64_TPREL16_LO:
11830 case R_PPC64_TPREL16_HI:
11831 case R_PPC64_TPREL16_HA:
11832 case R_PPC64_TPREL16_DS:
11833 case R_PPC64_TPREL16_LO_DS:
11834 case R_PPC64_TPREL16_HIGHER:
11835 case R_PPC64_TPREL16_HIGHERA:
11836 case R_PPC64_TPREL16_HIGHEST:
11837 case R_PPC64_TPREL16_HIGHESTA:
11838 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11839 if (info->shared)
11840 /* The TPREL16 relocs shouldn't really be used in shared
11841 libs as they will result in DT_TEXTREL being set, but
11842 support them anyway. */
11843 goto dodyn;
11844 break;
11845
11846 case R_PPC64_DTPREL16:
11847 case R_PPC64_DTPREL16_LO:
11848 case R_PPC64_DTPREL16_HI:
11849 case R_PPC64_DTPREL16_HA:
11850 case R_PPC64_DTPREL16_DS:
11851 case R_PPC64_DTPREL16_LO_DS:
11852 case R_PPC64_DTPREL16_HIGHER:
11853 case R_PPC64_DTPREL16_HIGHERA:
11854 case R_PPC64_DTPREL16_HIGHEST:
11855 case R_PPC64_DTPREL16_HIGHESTA:
11856 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11857 break;
11858
11859 case R_PPC64_DTPMOD64:
11860 relocation = 1;
11861 addend = 0;
11862 goto dodyn;
11863
11864 case R_PPC64_TPREL64:
11865 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11866 goto dodyn;
11867
11868 case R_PPC64_DTPREL64:
11869 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11870 /* Fall thru */
11871
11872 /* Relocations that may need to be propagated if this is a
11873 dynamic object. */
11874 case R_PPC64_REL30:
11875 case R_PPC64_REL32:
11876 case R_PPC64_REL64:
11877 case R_PPC64_ADDR14:
11878 case R_PPC64_ADDR14_BRNTAKEN:
11879 case R_PPC64_ADDR14_BRTAKEN:
11880 case R_PPC64_ADDR16:
11881 case R_PPC64_ADDR16_DS:
11882 case R_PPC64_ADDR16_HA:
11883 case R_PPC64_ADDR16_HI:
11884 case R_PPC64_ADDR16_HIGHER:
11885 case R_PPC64_ADDR16_HIGHERA:
11886 case R_PPC64_ADDR16_HIGHEST:
11887 case R_PPC64_ADDR16_HIGHESTA:
11888 case R_PPC64_ADDR16_LO:
11889 case R_PPC64_ADDR16_LO_DS:
11890 case R_PPC64_ADDR24:
11891 case R_PPC64_ADDR32:
11892 case R_PPC64_ADDR64:
11893 case R_PPC64_UADDR16:
11894 case R_PPC64_UADDR32:
11895 case R_PPC64_UADDR64:
11896 dodyn:
11897 if ((input_section->flags & SEC_ALLOC) == 0)
11898 break;
11899
11900 if (NO_OPD_RELOCS && is_opd)
11901 break;
11902
11903 if ((info->shared
11904 && (h == NULL
11905 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11906 || h->elf.root.type != bfd_link_hash_undefweak)
11907 && (must_be_dyn_reloc (info, r_type)
11908 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
11909 || (ELIMINATE_COPY_RELOCS
11910 && !info->shared
11911 && h != NULL
11912 && h->elf.dynindx != -1
11913 && !h->elf.non_got_ref
11914 && !h->elf.def_regular)
11915 || (!info->shared
11916 && (h != NULL
11917 ? h->elf.type == STT_GNU_IFUNC
11918 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
11919 {
11920 bfd_boolean skip, relocate;
11921 asection *sreloc;
11922 bfd_vma out_off;
11923
11924 /* When generating a dynamic object, these relocations
11925 are copied into the output file to be resolved at run
11926 time. */
11927
11928 skip = FALSE;
11929 relocate = FALSE;
11930
11931 out_off = _bfd_elf_section_offset (output_bfd, info,
11932 input_section, rel->r_offset);
11933 if (out_off == (bfd_vma) -1)
11934 skip = TRUE;
11935 else if (out_off == (bfd_vma) -2)
11936 skip = TRUE, relocate = TRUE;
11937 out_off += (input_section->output_section->vma
11938 + input_section->output_offset);
11939 outrel.r_offset = out_off;
11940 outrel.r_addend = rel->r_addend;
11941
11942 /* Optimize unaligned reloc use. */
11943 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11944 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11945 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11946 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11947 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11948 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11949 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11950 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11951 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11952
11953 if (skip)
11954 memset (&outrel, 0, sizeof outrel);
11955 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11956 && !is_opd
11957 && r_type != R_PPC64_TOC)
11958 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11959 else
11960 {
11961 /* This symbol is local, or marked to become local,
11962 or this is an opd section reloc which must point
11963 at a local function. */
11964 outrel.r_addend += relocation;
11965 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11966 {
11967 if (is_opd && h != NULL)
11968 {
11969 /* Lie about opd entries. This case occurs
11970 when building shared libraries and we
11971 reference a function in another shared
11972 lib. The same thing happens for a weak
11973 definition in an application that's
11974 overridden by a strong definition in a
11975 shared lib. (I believe this is a generic
11976 bug in binutils handling of weak syms.)
11977 In these cases we won't use the opd
11978 entry in this lib. */
11979 unresolved_reloc = FALSE;
11980 }
11981 if (!is_opd
11982 && r_type == R_PPC64_ADDR64
11983 && (h != NULL
11984 ? h->elf.type == STT_GNU_IFUNC
11985 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11986 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11987 else
11988 {
11989 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11990
11991 /* We need to relocate .opd contents for ld.so.
11992 Prelink also wants simple and consistent rules
11993 for relocs. This make all RELATIVE relocs have
11994 *r_offset equal to r_addend. */
11995 relocate = TRUE;
11996 }
11997 }
11998 else
11999 {
12000 long indx = 0;
12001
12002 if (h != NULL
12003 ? h->elf.type == STT_GNU_IFUNC
12004 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12005 {
12006 (*_bfd_error_handler)
12007 (_("%B(%A+0x%lx): relocation %s for indirect "
12008 "function %s unsupported"),
12009 input_bfd,
12010 input_section,
12011 (long) rel->r_offset,
12012 ppc64_elf_howto_table[r_type]->name,
12013 sym_name);
12014 ret = FALSE;
12015 }
12016 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12017 ;
12018 else if (sec == NULL || sec->owner == NULL)
12019 {
12020 bfd_set_error (bfd_error_bad_value);
12021 return FALSE;
12022 }
12023 else
12024 {
12025 asection *osec;
12026
12027 osec = sec->output_section;
12028 indx = elf_section_data (osec)->dynindx;
12029
12030 if (indx == 0)
12031 {
12032 if ((osec->flags & SEC_READONLY) == 0
12033 && htab->elf.data_index_section != NULL)
12034 osec = htab->elf.data_index_section;
12035 else
12036 osec = htab->elf.text_index_section;
12037 indx = elf_section_data (osec)->dynindx;
12038 }
12039 BFD_ASSERT (indx != 0);
12040
12041 /* We are turning this relocation into one
12042 against a section symbol, so subtract out
12043 the output section's address but not the
12044 offset of the input section in the output
12045 section. */
12046 outrel.r_addend -= osec->vma;
12047 }
12048
12049 outrel.r_info = ELF64_R_INFO (indx, r_type);
12050 }
12051 }
12052
12053 sreloc = elf_section_data (input_section)->sreloc;
12054 if (!htab->elf.dynamic_sections_created)
12055 sreloc = htab->reliplt;
12056 if (sreloc == NULL)
12057 abort ();
12058
12059 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12060 >= sreloc->size)
12061 abort ();
12062 loc = sreloc->contents;
12063 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12064 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12065
12066 /* If this reloc is against an external symbol, it will
12067 be computed at runtime, so there's no need to do
12068 anything now. However, for the sake of prelink ensure
12069 that the section contents are a known value. */
12070 if (! relocate)
12071 {
12072 unresolved_reloc = FALSE;
12073 /* The value chosen here is quite arbitrary as ld.so
12074 ignores section contents except for the special
12075 case of .opd where the contents might be accessed
12076 before relocation. Choose zero, as that won't
12077 cause reloc overflow. */
12078 relocation = 0;
12079 addend = 0;
12080 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12081 to improve backward compatibility with older
12082 versions of ld. */
12083 if (r_type == R_PPC64_ADDR64)
12084 addend = outrel.r_addend;
12085 /* Adjust pc_relative relocs to have zero in *r_offset. */
12086 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12087 addend = (input_section->output_section->vma
12088 + input_section->output_offset
12089 + rel->r_offset);
12090 }
12091 }
12092 break;
12093
12094 case R_PPC64_COPY:
12095 case R_PPC64_GLOB_DAT:
12096 case R_PPC64_JMP_SLOT:
12097 case R_PPC64_JMP_IREL:
12098 case R_PPC64_RELATIVE:
12099 /* We shouldn't ever see these dynamic relocs in relocatable
12100 files. */
12101 /* Fall through. */
12102
12103 case R_PPC64_PLTGOT16:
12104 case R_PPC64_PLTGOT16_DS:
12105 case R_PPC64_PLTGOT16_HA:
12106 case R_PPC64_PLTGOT16_HI:
12107 case R_PPC64_PLTGOT16_LO:
12108 case R_PPC64_PLTGOT16_LO_DS:
12109 case R_PPC64_PLTREL32:
12110 case R_PPC64_PLTREL64:
12111 /* These ones haven't been implemented yet. */
12112
12113 (*_bfd_error_handler)
12114 (_("%B: relocation %s is not supported for symbol %s."),
12115 input_bfd,
12116 ppc64_elf_howto_table[r_type]->name, sym_name);
12117
12118 bfd_set_error (bfd_error_invalid_operation);
12119 ret = FALSE;
12120 continue;
12121 }
12122
12123 /* Do any further special processing. */
12124 switch (r_type)
12125 {
12126 default:
12127 break;
12128
12129 case R_PPC64_ADDR16_HA:
12130 case R_PPC64_REL16_HA:
12131 case R_PPC64_ADDR16_HIGHERA:
12132 case R_PPC64_ADDR16_HIGHESTA:
12133 case R_PPC64_TOC16_HA:
12134 case R_PPC64_SECTOFF_HA:
12135 case R_PPC64_TPREL16_HA:
12136 case R_PPC64_DTPREL16_HA:
12137 case R_PPC64_TPREL16_HIGHER:
12138 case R_PPC64_TPREL16_HIGHERA:
12139 case R_PPC64_TPREL16_HIGHEST:
12140 case R_PPC64_TPREL16_HIGHESTA:
12141 case R_PPC64_DTPREL16_HIGHER:
12142 case R_PPC64_DTPREL16_HIGHERA:
12143 case R_PPC64_DTPREL16_HIGHEST:
12144 case R_PPC64_DTPREL16_HIGHESTA:
12145 /* It's just possible that this symbol is a weak symbol
12146 that's not actually defined anywhere. In that case,
12147 'sec' would be NULL, and we should leave the symbol
12148 alone (it will be set to zero elsewhere in the link). */
12149 if (sec == NULL)
12150 break;
12151 /* Fall thru */
12152
12153 case R_PPC64_GOT16_HA:
12154 case R_PPC64_PLTGOT16_HA:
12155 case R_PPC64_PLT16_HA:
12156 case R_PPC64_GOT_TLSGD16_HA:
12157 case R_PPC64_GOT_TLSLD16_HA:
12158 case R_PPC64_GOT_TPREL16_HA:
12159 case R_PPC64_GOT_DTPREL16_HA:
12160 /* Add 0x10000 if sign bit in 0:15 is set.
12161 Bits 0:15 are not used. */
12162 addend += 0x8000;
12163 break;
12164
12165 case R_PPC64_ADDR16_DS:
12166 case R_PPC64_ADDR16_LO_DS:
12167 case R_PPC64_GOT16_DS:
12168 case R_PPC64_GOT16_LO_DS:
12169 case R_PPC64_PLT16_LO_DS:
12170 case R_PPC64_SECTOFF_DS:
12171 case R_PPC64_SECTOFF_LO_DS:
12172 case R_PPC64_TOC16_DS:
12173 case R_PPC64_TOC16_LO_DS:
12174 case R_PPC64_PLTGOT16_DS:
12175 case R_PPC64_PLTGOT16_LO_DS:
12176 case R_PPC64_GOT_TPREL16_DS:
12177 case R_PPC64_GOT_TPREL16_LO_DS:
12178 case R_PPC64_GOT_DTPREL16_DS:
12179 case R_PPC64_GOT_DTPREL16_LO_DS:
12180 case R_PPC64_TPREL16_DS:
12181 case R_PPC64_TPREL16_LO_DS:
12182 case R_PPC64_DTPREL16_DS:
12183 case R_PPC64_DTPREL16_LO_DS:
12184 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12185 mask = 3;
12186 /* If this reloc is against an lq insn, then the value must be
12187 a multiple of 16. This is somewhat of a hack, but the
12188 "correct" way to do this by defining _DQ forms of all the
12189 _DS relocs bloats all reloc switches in this file. It
12190 doesn't seem to make much sense to use any of these relocs
12191 in data, so testing the insn should be safe. */
12192 if ((insn & (0x3f << 26)) == (56u << 26))
12193 mask = 15;
12194 if (((relocation + addend) & mask) != 0)
12195 {
12196 (*_bfd_error_handler)
12197 (_("%B: error: relocation %s not a multiple of %d"),
12198 input_bfd,
12199 ppc64_elf_howto_table[r_type]->name,
12200 mask + 1);
12201 bfd_set_error (bfd_error_bad_value);
12202 ret = FALSE;
12203 continue;
12204 }
12205 break;
12206 }
12207
12208 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12209 because such sections are not SEC_ALLOC and thus ld.so will
12210 not process them. */
12211 if (unresolved_reloc
12212 && !((input_section->flags & SEC_DEBUGGING) != 0
12213 && h->elf.def_dynamic))
12214 {
12215 (*_bfd_error_handler)
12216 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12217 input_bfd,
12218 input_section,
12219 (long) rel->r_offset,
12220 ppc64_elf_howto_table[(int) r_type]->name,
12221 h->elf.root.root.string);
12222 ret = FALSE;
12223 }
12224
12225 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12226 input_bfd,
12227 input_section,
12228 contents,
12229 rel->r_offset,
12230 relocation,
12231 addend);
12232
12233 if (r != bfd_reloc_ok)
12234 {
12235 if (sym_name == NULL)
12236 sym_name = "(null)";
12237 if (r == bfd_reloc_overflow)
12238 {
12239 if (warned)
12240 continue;
12241 if (h != NULL
12242 && h->elf.root.type == bfd_link_hash_undefweak
12243 && ppc64_elf_howto_table[r_type]->pc_relative)
12244 {
12245 /* Assume this is a call protected by other code that
12246 detects the symbol is undefined. If this is the case,
12247 we can safely ignore the overflow. If not, the
12248 program is hosed anyway, and a little warning isn't
12249 going to help. */
12250
12251 continue;
12252 }
12253
12254 if (!((*info->callbacks->reloc_overflow)
12255 (info, (h ? &h->elf.root : NULL), sym_name,
12256 ppc64_elf_howto_table[r_type]->name,
12257 orig_addend, input_bfd, input_section, rel->r_offset)))
12258 return FALSE;
12259 }
12260 else
12261 {
12262 (*_bfd_error_handler)
12263 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12264 input_bfd,
12265 input_section,
12266 (long) rel->r_offset,
12267 ppc64_elf_howto_table[r_type]->name,
12268 sym_name,
12269 (int) r);
12270 ret = FALSE;
12271 }
12272 }
12273 }
12274
12275 /* If we're emitting relocations, then shortly after this function
12276 returns, reloc offsets and addends for this section will be
12277 adjusted. Worse, reloc symbol indices will be for the output
12278 file rather than the input. Save a copy of the relocs for
12279 opd_entry_value. */
12280 if (is_opd && (info->emitrelocations || info->relocatable))
12281 {
12282 bfd_size_type amt;
12283 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
12284 rel = bfd_alloc (input_bfd, amt);
12285 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
12286 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
12287 if (rel == NULL)
12288 return FALSE;
12289 memcpy (rel, relocs, amt);
12290 }
12291 return ret;
12292 }
12293
12294 /* Adjust the value of any local symbols in opd sections. */
12295
12296 static int
12297 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
12298 const char *name ATTRIBUTE_UNUSED,
12299 Elf_Internal_Sym *elfsym,
12300 asection *input_sec,
12301 struct elf_link_hash_entry *h)
12302 {
12303 struct _opd_sec_data *opd;
12304 long adjust;
12305 bfd_vma value;
12306
12307 if (h != NULL)
12308 return 1;
12309
12310 opd = get_opd_info (input_sec);
12311 if (opd == NULL || opd->adjust == NULL)
12312 return 1;
12313
12314 value = elfsym->st_value - input_sec->output_offset;
12315 if (!info->relocatable)
12316 value -= input_sec->output_section->vma;
12317
12318 adjust = opd->adjust[value / 8];
12319 if (adjust == -1)
12320 return 2;
12321
12322 elfsym->st_value += adjust;
12323 return 1;
12324 }
12325
12326 /* Finish up dynamic symbol handling. We set the contents of various
12327 dynamic sections here. */
12328
12329 static bfd_boolean
12330 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
12331 struct bfd_link_info *info,
12332 struct elf_link_hash_entry *h,
12333 Elf_Internal_Sym *sym)
12334 {
12335 struct ppc_link_hash_table *htab;
12336 struct plt_entry *ent;
12337 Elf_Internal_Rela rela;
12338 bfd_byte *loc;
12339
12340 htab = ppc_hash_table (info);
12341
12342 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12343 if (ent->plt.offset != (bfd_vma) -1)
12344 {
12345 /* This symbol has an entry in the procedure linkage
12346 table. Set it up. */
12347 if (!htab->elf.dynamic_sections_created
12348 || h->dynindx == -1)
12349 {
12350 BFD_ASSERT (h->type == STT_GNU_IFUNC
12351 && h->def_regular
12352 && (h->root.type == bfd_link_hash_defined
12353 || h->root.type == bfd_link_hash_defweak));
12354 rela.r_offset = (htab->iplt->output_section->vma
12355 + htab->iplt->output_offset
12356 + ent->plt.offset);
12357 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12358 rela.r_addend = (h->root.u.def.value
12359 + h->root.u.def.section->output_offset
12360 + h->root.u.def.section->output_section->vma
12361 + ent->addend);
12362 loc = (htab->reliplt->contents
12363 + (htab->reliplt->reloc_count++
12364 * sizeof (Elf64_External_Rela)));
12365 }
12366 else
12367 {
12368 rela.r_offset = (htab->plt->output_section->vma
12369 + htab->plt->output_offset
12370 + ent->plt.offset);
12371 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
12372 rela.r_addend = ent->addend;
12373 loc = (htab->relplt->contents
12374 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
12375 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
12376 }
12377 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12378 }
12379
12380 if (h->needs_copy)
12381 {
12382 /* This symbol needs a copy reloc. Set it up. */
12383
12384 if (h->dynindx == -1
12385 || (h->root.type != bfd_link_hash_defined
12386 && h->root.type != bfd_link_hash_defweak)
12387 || htab->relbss == NULL)
12388 abort ();
12389
12390 rela.r_offset = (h->root.u.def.value
12391 + h->root.u.def.section->output_section->vma
12392 + h->root.u.def.section->output_offset);
12393 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
12394 rela.r_addend = 0;
12395 loc = htab->relbss->contents;
12396 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
12397 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12398 }
12399
12400 /* Mark some specially defined symbols as absolute. */
12401 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
12402 sym->st_shndx = SHN_ABS;
12403
12404 return TRUE;
12405 }
12406
12407 /* Used to decide how to sort relocs in an optimal manner for the
12408 dynamic linker, before writing them out. */
12409
12410 static enum elf_reloc_type_class
12411 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
12412 {
12413 enum elf_ppc64_reloc_type r_type;
12414
12415 r_type = ELF64_R_TYPE (rela->r_info);
12416 switch (r_type)
12417 {
12418 case R_PPC64_RELATIVE:
12419 return reloc_class_relative;
12420 case R_PPC64_JMP_SLOT:
12421 return reloc_class_plt;
12422 case R_PPC64_COPY:
12423 return reloc_class_copy;
12424 default:
12425 return reloc_class_normal;
12426 }
12427 }
12428
12429 /* Finish up the dynamic sections. */
12430
12431 static bfd_boolean
12432 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
12433 struct bfd_link_info *info)
12434 {
12435 struct ppc_link_hash_table *htab;
12436 bfd *dynobj;
12437 asection *sdyn;
12438
12439 htab = ppc_hash_table (info);
12440 dynobj = htab->elf.dynobj;
12441 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
12442
12443 if (htab->elf.dynamic_sections_created)
12444 {
12445 Elf64_External_Dyn *dyncon, *dynconend;
12446
12447 if (sdyn == NULL || htab->got == NULL)
12448 abort ();
12449
12450 dyncon = (Elf64_External_Dyn *) sdyn->contents;
12451 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
12452 for (; dyncon < dynconend; dyncon++)
12453 {
12454 Elf_Internal_Dyn dyn;
12455 asection *s;
12456
12457 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
12458
12459 switch (dyn.d_tag)
12460 {
12461 default:
12462 continue;
12463
12464 case DT_PPC64_GLINK:
12465 s = htab->glink;
12466 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12467 /* We stupidly defined DT_PPC64_GLINK to be the start
12468 of glink rather than the first entry point, which is
12469 what ld.so needs, and now have a bigger stub to
12470 support automatic multiple TOCs. */
12471 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
12472 break;
12473
12474 case DT_PPC64_OPD:
12475 s = bfd_get_section_by_name (output_bfd, ".opd");
12476 if (s == NULL)
12477 continue;
12478 dyn.d_un.d_ptr = s->vma;
12479 break;
12480
12481 case DT_PPC64_OPDSZ:
12482 s = bfd_get_section_by_name (output_bfd, ".opd");
12483 if (s == NULL)
12484 continue;
12485 dyn.d_un.d_val = s->size;
12486 break;
12487
12488 case DT_PLTGOT:
12489 s = htab->plt;
12490 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12491 break;
12492
12493 case DT_JMPREL:
12494 s = htab->relplt;
12495 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12496 break;
12497
12498 case DT_PLTRELSZ:
12499 dyn.d_un.d_val = htab->relplt->size;
12500 break;
12501
12502 case DT_RELASZ:
12503 /* Don't count procedure linkage table relocs in the
12504 overall reloc count. */
12505 s = htab->relplt;
12506 if (s == NULL)
12507 continue;
12508 dyn.d_un.d_val -= s->size;
12509 break;
12510
12511 case DT_RELA:
12512 /* We may not be using the standard ELF linker script.
12513 If .rela.plt is the first .rela section, we adjust
12514 DT_RELA to not include it. */
12515 s = htab->relplt;
12516 if (s == NULL)
12517 continue;
12518 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
12519 continue;
12520 dyn.d_un.d_ptr += s->size;
12521 break;
12522 }
12523
12524 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
12525 }
12526 }
12527
12528 if (htab->got != NULL && htab->got->size != 0)
12529 {
12530 /* Fill in the first entry in the global offset table.
12531 We use it to hold the link-time TOCbase. */
12532 bfd_put_64 (output_bfd,
12533 elf_gp (output_bfd) + TOC_BASE_OFF,
12534 htab->got->contents);
12535
12536 /* Set .got entry size. */
12537 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
12538 }
12539
12540 if (htab->plt != NULL && htab->plt->size != 0)
12541 {
12542 /* Set .plt entry size. */
12543 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
12544 = PLT_ENTRY_SIZE;
12545 }
12546
12547 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
12548 brlt ourselves if emitrelocations. */
12549 if (htab->brlt != NULL
12550 && htab->brlt->reloc_count != 0
12551 && !_bfd_elf_link_output_relocs (output_bfd,
12552 htab->brlt,
12553 &elf_section_data (htab->brlt)->rel_hdr,
12554 elf_section_data (htab->brlt)->relocs,
12555 NULL))
12556 return FALSE;
12557
12558 if (htab->glink != NULL
12559 && htab->glink->reloc_count != 0
12560 && !_bfd_elf_link_output_relocs (output_bfd,
12561 htab->glink,
12562 &elf_section_data (htab->glink)->rel_hdr,
12563 elf_section_data (htab->glink)->relocs,
12564 NULL))
12565 return FALSE;
12566
12567 /* We need to handle writing out multiple GOT sections ourselves,
12568 since we didn't add them to DYNOBJ. We know dynobj is the first
12569 bfd. */
12570 while ((dynobj = dynobj->link_next) != NULL)
12571 {
12572 asection *s;
12573
12574 if (!is_ppc64_elf (dynobj))
12575 continue;
12576
12577 s = ppc64_elf_tdata (dynobj)->got;
12578 if (s != NULL
12579 && s->size != 0
12580 && s->output_section != bfd_abs_section_ptr
12581 && !bfd_set_section_contents (output_bfd, s->output_section,
12582 s->contents, s->output_offset,
12583 s->size))
12584 return FALSE;
12585 s = ppc64_elf_tdata (dynobj)->relgot;
12586 if (s != NULL
12587 && s->size != 0
12588 && s->output_section != bfd_abs_section_ptr
12589 && !bfd_set_section_contents (output_bfd, s->output_section,
12590 s->contents, s->output_offset,
12591 s->size))
12592 return FALSE;
12593 }
12594
12595 return TRUE;
12596 }
12597
12598 #include "elf64-target.h"
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