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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_check_directives
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
100 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
101 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
102 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
103 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
104 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
105 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
106 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
107 #define elf_backend_action_discarded ppc64_elf_action_discarded
108 #define elf_backend_relocate_section ppc64_elf_relocate_section
109 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
110 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
111 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
112 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
113 #define elf_backend_special_sections ppc64_elf_special_sections
114
115 /* The name of the dynamic interpreter. This is put in the .interp
116 section. */
117 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
118
119 /* The size in bytes of an entry in the procedure linkage table. */
120 #define PLT_ENTRY_SIZE 24
121
122 /* The initial size of the plt reserved for the dynamic linker. */
123 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
124
125 /* TOC base pointers offset from start of TOC. */
126 #define TOC_BASE_OFF 0x8000
127
128 /* Offset of tp and dtp pointers from start of TLS block. */
129 #define TP_OFFSET 0x7000
130 #define DTP_OFFSET 0x8000
131
132 /* .plt call stub instructions. The normal stub is like this, but
133 sometimes the .plt entry crosses a 64k boundary and we need to
134 insert an addi to adjust r12. */
135 #define PLT_CALL_STUB_SIZE (7*4)
136 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
137 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
138 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
139 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
140 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
141 /* ld %r11,xxx+16@l(%r12) */
142 #define BCTR 0x4e800420 /* bctr */
143
144
145 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
146 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
147 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
148 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
149
150 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
151 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
152
153 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
154
155 /* glink call stub instructions. We enter with the index in R0. */
156 #define GLINK_CALL_STUB_SIZE (16*4)
157 /* 0: */
158 /* .quad plt0-1f */
159 /* __glink: */
160 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
161 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
162 /* 1: */
163 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
164 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
165 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
166 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
167 /* ld %11,0(%12) */
168 /* ld %2,8(%12) */
169 /* mtctr %11 */
170 /* ld %11,16(%12) */
171 /* bctr */
172
173 /* Pad with this. */
174 #define NOP 0x60000000
175
176 /* Some other nops. */
177 #define CROR_151515 0x4def7b82
178 #define CROR_313131 0x4ffffb82
179
180 /* .glink entries for the first 32k functions are two instructions. */
181 #define LI_R0_0 0x38000000 /* li %r0,0 */
182 #define B_DOT 0x48000000 /* b . */
183
184 /* After that, we need two instructions to load the index, followed by
185 a branch. */
186 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
187 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
188
189 /* Instructions used by the save and restore reg functions. */
190 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
191 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
192 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
193 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
194 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
195 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
196 #define LI_R12_0 0x39800000 /* li %r12,0 */
197 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
198 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
199 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
200 #define BLR 0x4e800020 /* blr */
201
202 /* Since .opd is an array of descriptors and each entry will end up
203 with identical R_PPC64_RELATIVE relocs, there is really no need to
204 propagate .opd relocs; The dynamic linker should be taught to
205 relocate .opd without reloc entries. */
206 #ifndef NO_OPD_RELOCS
207 #define NO_OPD_RELOCS 0
208 #endif
209 \f
210 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
211
212 /* Relocation HOWTO's. */
213 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
214
215 static reloc_howto_type ppc64_elf_howto_raw[] = {
216 /* This reloc does nothing. */
217 HOWTO (R_PPC64_NONE, /* type */
218 0, /* rightshift */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
220 32, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_dont, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC64_NONE", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A standard 32 bit relocation. */
232 HOWTO (R_PPC64_ADDR32, /* type */
233 0, /* rightshift */
234 2, /* size (0 = byte, 1 = short, 2 = long) */
235 32, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_bitfield, /* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC64_ADDR32", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffffffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* An absolute 26 bit branch; the lower two bits must be zero.
247 FIXME: we don't check that, we just clear them. */
248 HOWTO (R_PPC64_ADDR24, /* type */
249 0, /* rightshift */
250 2, /* size (0 = byte, 1 = short, 2 = long) */
251 26, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_bitfield, /* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC64_ADDR24", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0x03fffffc, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* A standard 16 bit relocation. */
263 HOWTO (R_PPC64_ADDR16, /* type */
264 0, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_bitfield, /* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_PPC64_ADDR16", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* A 16 bit relocation without overflow. */
278 HOWTO (R_PPC64_ADDR16_LO, /* type */
279 0, /* rightshift */
280 1, /* size (0 = byte, 1 = short, 2 = long) */
281 16, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_dont,/* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_PPC64_ADDR16_LO", /* name */
287 FALSE, /* partial_inplace */
288 0, /* src_mask */
289 0xffff, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* Bits 16-31 of an address. */
293 HOWTO (R_PPC64_ADDR16_HI, /* type */
294 16, /* rightshift */
295 1, /* size (0 = byte, 1 = short, 2 = long) */
296 16, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_dont, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_PPC64_ADDR16_HI", /* name */
302 FALSE, /* partial_inplace */
303 0, /* src_mask */
304 0xffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
308 bits, treated as a signed number, is negative. */
309 HOWTO (R_PPC64_ADDR16_HA, /* type */
310 16, /* rightshift */
311 1, /* size (0 = byte, 1 = short, 2 = long) */
312 16, /* bitsize */
313 FALSE, /* pc_relative */
314 0, /* bitpos */
315 complain_overflow_dont, /* complain_on_overflow */
316 ppc64_elf_ha_reloc, /* special_function */
317 "R_PPC64_ADDR16_HA", /* name */
318 FALSE, /* partial_inplace */
319 0, /* src_mask */
320 0xffff, /* dst_mask */
321 FALSE), /* pcrel_offset */
322
323 /* An absolute 16 bit branch; the lower two bits must be zero.
324 FIXME: we don't check that, we just clear them. */
325 HOWTO (R_PPC64_ADDR14, /* type */
326 0, /* rightshift */
327 2, /* size (0 = byte, 1 = short, 2 = long) */
328 16, /* bitsize */
329 FALSE, /* pc_relative */
330 0, /* bitpos */
331 complain_overflow_bitfield, /* complain_on_overflow */
332 ppc64_elf_branch_reloc, /* special_function */
333 "R_PPC64_ADDR14", /* name */
334 FALSE, /* partial_inplace */
335 0, /* src_mask */
336 0x0000fffc, /* dst_mask */
337 FALSE), /* pcrel_offset */
338
339 /* An absolute 16 bit branch, for which bit 10 should be set to
340 indicate that the branch is expected to be taken. The lower two
341 bits must be zero. */
342 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
343 0, /* rightshift */
344 2, /* size (0 = byte, 1 = short, 2 = long) */
345 16, /* bitsize */
346 FALSE, /* pc_relative */
347 0, /* bitpos */
348 complain_overflow_bitfield, /* complain_on_overflow */
349 ppc64_elf_brtaken_reloc, /* special_function */
350 "R_PPC64_ADDR14_BRTAKEN",/* name */
351 FALSE, /* partial_inplace */
352 0, /* src_mask */
353 0x0000fffc, /* dst_mask */
354 FALSE), /* pcrel_offset */
355
356 /* An absolute 16 bit branch, for which bit 10 should be set to
357 indicate that the branch is not expected to be taken. The lower
358 two bits must be zero. */
359 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 FALSE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_bitfield, /* complain_on_overflow */
366 ppc64_elf_brtaken_reloc, /* special_function */
367 "R_PPC64_ADDR14_BRNTAKEN",/* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0x0000fffc, /* dst_mask */
371 FALSE), /* pcrel_offset */
372
373 /* A relative 26 bit branch; the lower two bits must be zero. */
374 HOWTO (R_PPC64_REL24, /* type */
375 0, /* rightshift */
376 2, /* size (0 = byte, 1 = short, 2 = long) */
377 26, /* bitsize */
378 TRUE, /* pc_relative */
379 0, /* bitpos */
380 complain_overflow_signed, /* complain_on_overflow */
381 ppc64_elf_branch_reloc, /* special_function */
382 "R_PPC64_REL24", /* name */
383 FALSE, /* partial_inplace */
384 0, /* src_mask */
385 0x03fffffc, /* dst_mask */
386 TRUE), /* pcrel_offset */
387
388 /* A relative 16 bit branch; the lower two bits must be zero. */
389 HOWTO (R_PPC64_REL14, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 16, /* bitsize */
393 TRUE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_signed, /* complain_on_overflow */
396 ppc64_elf_branch_reloc, /* special_function */
397 "R_PPC64_REL14", /* name */
398 FALSE, /* partial_inplace */
399 0, /* src_mask */
400 0x0000fffc, /* dst_mask */
401 TRUE), /* pcrel_offset */
402
403 /* A relative 16 bit branch. Bit 10 should be set to indicate that
404 the branch is expected to be taken. The lower two bits must be
405 zero. */
406 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
407 0, /* rightshift */
408 2, /* size (0 = byte, 1 = short, 2 = long) */
409 16, /* bitsize */
410 TRUE, /* pc_relative */
411 0, /* bitpos */
412 complain_overflow_signed, /* complain_on_overflow */
413 ppc64_elf_brtaken_reloc, /* special_function */
414 "R_PPC64_REL14_BRTAKEN", /* name */
415 FALSE, /* partial_inplace */
416 0, /* src_mask */
417 0x0000fffc, /* dst_mask */
418 TRUE), /* pcrel_offset */
419
420 /* A relative 16 bit branch. Bit 10 should be set to indicate that
421 the branch is not expected to be taken. The lower two bits must
422 be zero. */
423 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 16, /* bitsize */
427 TRUE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_signed, /* complain_on_overflow */
430 ppc64_elf_brtaken_reloc, /* special_function */
431 "R_PPC64_REL14_BRNTAKEN",/* name */
432 FALSE, /* partial_inplace */
433 0, /* src_mask */
434 0x0000fffc, /* dst_mask */
435 TRUE), /* pcrel_offset */
436
437 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
438 symbol. */
439 HOWTO (R_PPC64_GOT16, /* type */
440 0, /* rightshift */
441 1, /* size (0 = byte, 1 = short, 2 = long) */
442 16, /* bitsize */
443 FALSE, /* pc_relative */
444 0, /* bitpos */
445 complain_overflow_signed, /* complain_on_overflow */
446 ppc64_elf_unhandled_reloc, /* special_function */
447 "R_PPC64_GOT16", /* name */
448 FALSE, /* partial_inplace */
449 0, /* src_mask */
450 0xffff, /* dst_mask */
451 FALSE), /* pcrel_offset */
452
453 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
454 the symbol. */
455 HOWTO (R_PPC64_GOT16_LO, /* type */
456 0, /* rightshift */
457 1, /* size (0 = byte, 1 = short, 2 = long) */
458 16, /* bitsize */
459 FALSE, /* pc_relative */
460 0, /* bitpos */
461 complain_overflow_dont, /* complain_on_overflow */
462 ppc64_elf_unhandled_reloc, /* special_function */
463 "R_PPC64_GOT16_LO", /* name */
464 FALSE, /* partial_inplace */
465 0, /* src_mask */
466 0xffff, /* dst_mask */
467 FALSE), /* pcrel_offset */
468
469 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
470 the symbol. */
471 HOWTO (R_PPC64_GOT16_HI, /* type */
472 16, /* rightshift */
473 1, /* size (0 = byte, 1 = short, 2 = long) */
474 16, /* bitsize */
475 FALSE, /* pc_relative */
476 0, /* bitpos */
477 complain_overflow_dont,/* complain_on_overflow */
478 ppc64_elf_unhandled_reloc, /* special_function */
479 "R_PPC64_GOT16_HI", /* name */
480 FALSE, /* partial_inplace */
481 0, /* src_mask */
482 0xffff, /* dst_mask */
483 FALSE), /* pcrel_offset */
484
485 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
486 the symbol. */
487 HOWTO (R_PPC64_GOT16_HA, /* type */
488 16, /* rightshift */
489 1, /* size (0 = byte, 1 = short, 2 = long) */
490 16, /* bitsize */
491 FALSE, /* pc_relative */
492 0, /* bitpos */
493 complain_overflow_dont,/* complain_on_overflow */
494 ppc64_elf_unhandled_reloc, /* special_function */
495 "R_PPC64_GOT16_HA", /* name */
496 FALSE, /* partial_inplace */
497 0, /* src_mask */
498 0xffff, /* dst_mask */
499 FALSE), /* pcrel_offset */
500
501 /* This is used only by the dynamic linker. The symbol should exist
502 both in the object being run and in some shared library. The
503 dynamic linker copies the data addressed by the symbol from the
504 shared library into the object, because the object being
505 run has to have the data at some particular address. */
506 HOWTO (R_PPC64_COPY, /* type */
507 0, /* rightshift */
508 0, /* this one is variable size */
509 0, /* bitsize */
510 FALSE, /* pc_relative */
511 0, /* bitpos */
512 complain_overflow_dont, /* complain_on_overflow */
513 ppc64_elf_unhandled_reloc, /* special_function */
514 "R_PPC64_COPY", /* name */
515 FALSE, /* partial_inplace */
516 0, /* src_mask */
517 0, /* dst_mask */
518 FALSE), /* pcrel_offset */
519
520 /* Like R_PPC64_ADDR64, but used when setting global offset table
521 entries. */
522 HOWTO (R_PPC64_GLOB_DAT, /* type */
523 0, /* rightshift */
524 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
525 64, /* bitsize */
526 FALSE, /* pc_relative */
527 0, /* bitpos */
528 complain_overflow_dont, /* complain_on_overflow */
529 ppc64_elf_unhandled_reloc, /* special_function */
530 "R_PPC64_GLOB_DAT", /* name */
531 FALSE, /* partial_inplace */
532 0, /* src_mask */
533 ONES (64), /* dst_mask */
534 FALSE), /* pcrel_offset */
535
536 /* Created by the link editor. Marks a procedure linkage table
537 entry for a symbol. */
538 HOWTO (R_PPC64_JMP_SLOT, /* type */
539 0, /* rightshift */
540 0, /* size (0 = byte, 1 = short, 2 = long) */
541 0, /* bitsize */
542 FALSE, /* pc_relative */
543 0, /* bitpos */
544 complain_overflow_dont, /* complain_on_overflow */
545 ppc64_elf_unhandled_reloc, /* special_function */
546 "R_PPC64_JMP_SLOT", /* name */
547 FALSE, /* partial_inplace */
548 0, /* src_mask */
549 0, /* dst_mask */
550 FALSE), /* pcrel_offset */
551
552 /* Used only by the dynamic linker. When the object is run, this
553 doubleword64 is set to the load address of the object, plus the
554 addend. */
555 HOWTO (R_PPC64_RELATIVE, /* type */
556 0, /* rightshift */
557 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
558 64, /* bitsize */
559 FALSE, /* pc_relative */
560 0, /* bitpos */
561 complain_overflow_dont, /* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_PPC64_RELATIVE", /* name */
564 FALSE, /* partial_inplace */
565 0, /* src_mask */
566 ONES (64), /* dst_mask */
567 FALSE), /* pcrel_offset */
568
569 /* Like R_PPC64_ADDR32, but may be unaligned. */
570 HOWTO (R_PPC64_UADDR32, /* type */
571 0, /* rightshift */
572 2, /* size (0 = byte, 1 = short, 2 = long) */
573 32, /* bitsize */
574 FALSE, /* pc_relative */
575 0, /* bitpos */
576 complain_overflow_bitfield, /* complain_on_overflow */
577 bfd_elf_generic_reloc, /* special_function */
578 "R_PPC64_UADDR32", /* name */
579 FALSE, /* partial_inplace */
580 0, /* src_mask */
581 0xffffffff, /* dst_mask */
582 FALSE), /* pcrel_offset */
583
584 /* Like R_PPC64_ADDR16, but may be unaligned. */
585 HOWTO (R_PPC64_UADDR16, /* type */
586 0, /* rightshift */
587 1, /* size (0 = byte, 1 = short, 2 = long) */
588 16, /* bitsize */
589 FALSE, /* pc_relative */
590 0, /* bitpos */
591 complain_overflow_bitfield, /* complain_on_overflow */
592 bfd_elf_generic_reloc, /* special_function */
593 "R_PPC64_UADDR16", /* name */
594 FALSE, /* partial_inplace */
595 0, /* src_mask */
596 0xffff, /* dst_mask */
597 FALSE), /* pcrel_offset */
598
599 /* 32-bit PC relative. */
600 HOWTO (R_PPC64_REL32, /* type */
601 0, /* rightshift */
602 2, /* size (0 = byte, 1 = short, 2 = long) */
603 32, /* bitsize */
604 TRUE, /* pc_relative */
605 0, /* bitpos */
606 /* FIXME: Verify. Was complain_overflow_bitfield. */
607 complain_overflow_signed, /* complain_on_overflow */
608 bfd_elf_generic_reloc, /* special_function */
609 "R_PPC64_REL32", /* name */
610 FALSE, /* partial_inplace */
611 0, /* src_mask */
612 0xffffffff, /* dst_mask */
613 TRUE), /* pcrel_offset */
614
615 /* 32-bit relocation to the symbol's procedure linkage table. */
616 HOWTO (R_PPC64_PLT32, /* type */
617 0, /* rightshift */
618 2, /* size (0 = byte, 1 = short, 2 = long) */
619 32, /* bitsize */
620 FALSE, /* pc_relative */
621 0, /* bitpos */
622 complain_overflow_bitfield, /* complain_on_overflow */
623 ppc64_elf_unhandled_reloc, /* special_function */
624 "R_PPC64_PLT32", /* name */
625 FALSE, /* partial_inplace */
626 0, /* src_mask */
627 0xffffffff, /* dst_mask */
628 FALSE), /* pcrel_offset */
629
630 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
631 FIXME: R_PPC64_PLTREL32 not supported. */
632 HOWTO (R_PPC64_PLTREL32, /* type */
633 0, /* rightshift */
634 2, /* size (0 = byte, 1 = short, 2 = long) */
635 32, /* bitsize */
636 TRUE, /* pc_relative */
637 0, /* bitpos */
638 complain_overflow_signed, /* complain_on_overflow */
639 bfd_elf_generic_reloc, /* special_function */
640 "R_PPC64_PLTREL32", /* name */
641 FALSE, /* partial_inplace */
642 0, /* src_mask */
643 0xffffffff, /* dst_mask */
644 TRUE), /* pcrel_offset */
645
646 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
647 the symbol. */
648 HOWTO (R_PPC64_PLT16_LO, /* type */
649 0, /* rightshift */
650 1, /* size (0 = byte, 1 = short, 2 = long) */
651 16, /* bitsize */
652 FALSE, /* pc_relative */
653 0, /* bitpos */
654 complain_overflow_dont, /* complain_on_overflow */
655 ppc64_elf_unhandled_reloc, /* special_function */
656 "R_PPC64_PLT16_LO", /* name */
657 FALSE, /* partial_inplace */
658 0, /* src_mask */
659 0xffff, /* dst_mask */
660 FALSE), /* pcrel_offset */
661
662 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
663 the symbol. */
664 HOWTO (R_PPC64_PLT16_HI, /* type */
665 16, /* rightshift */
666 1, /* size (0 = byte, 1 = short, 2 = long) */
667 16, /* bitsize */
668 FALSE, /* pc_relative */
669 0, /* bitpos */
670 complain_overflow_dont, /* complain_on_overflow */
671 ppc64_elf_unhandled_reloc, /* special_function */
672 "R_PPC64_PLT16_HI", /* name */
673 FALSE, /* partial_inplace */
674 0, /* src_mask */
675 0xffff, /* dst_mask */
676 FALSE), /* pcrel_offset */
677
678 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
679 the symbol. */
680 HOWTO (R_PPC64_PLT16_HA, /* type */
681 16, /* rightshift */
682 1, /* size (0 = byte, 1 = short, 2 = long) */
683 16, /* bitsize */
684 FALSE, /* pc_relative */
685 0, /* bitpos */
686 complain_overflow_dont, /* complain_on_overflow */
687 ppc64_elf_unhandled_reloc, /* special_function */
688 "R_PPC64_PLT16_HA", /* name */
689 FALSE, /* partial_inplace */
690 0, /* src_mask */
691 0xffff, /* dst_mask */
692 FALSE), /* pcrel_offset */
693
694 /* 16-bit section relative relocation. */
695 HOWTO (R_PPC64_SECTOFF, /* type */
696 0, /* rightshift */
697 1, /* size (0 = byte, 1 = short, 2 = long) */
698 16, /* bitsize */
699 FALSE, /* pc_relative */
700 0, /* bitpos */
701 complain_overflow_bitfield, /* complain_on_overflow */
702 ppc64_elf_sectoff_reloc, /* special_function */
703 "R_PPC64_SECTOFF", /* name */
704 FALSE, /* partial_inplace */
705 0, /* src_mask */
706 0xffff, /* dst_mask */
707 FALSE), /* pcrel_offset */
708
709 /* Like R_PPC64_SECTOFF, but no overflow warning. */
710 HOWTO (R_PPC64_SECTOFF_LO, /* type */
711 0, /* rightshift */
712 1, /* size (0 = byte, 1 = short, 2 = long) */
713 16, /* bitsize */
714 FALSE, /* pc_relative */
715 0, /* bitpos */
716 complain_overflow_dont, /* complain_on_overflow */
717 ppc64_elf_sectoff_reloc, /* special_function */
718 "R_PPC64_SECTOFF_LO", /* name */
719 FALSE, /* partial_inplace */
720 0, /* src_mask */
721 0xffff, /* dst_mask */
722 FALSE), /* pcrel_offset */
723
724 /* 16-bit upper half section relative relocation. */
725 HOWTO (R_PPC64_SECTOFF_HI, /* type */
726 16, /* rightshift */
727 1, /* size (0 = byte, 1 = short, 2 = long) */
728 16, /* bitsize */
729 FALSE, /* pc_relative */
730 0, /* bitpos */
731 complain_overflow_dont, /* complain_on_overflow */
732 ppc64_elf_sectoff_reloc, /* special_function */
733 "R_PPC64_SECTOFF_HI", /* name */
734 FALSE, /* partial_inplace */
735 0, /* src_mask */
736 0xffff, /* dst_mask */
737 FALSE), /* pcrel_offset */
738
739 /* 16-bit upper half adjusted section relative relocation. */
740 HOWTO (R_PPC64_SECTOFF_HA, /* type */
741 16, /* rightshift */
742 1, /* size (0 = byte, 1 = short, 2 = long) */
743 16, /* bitsize */
744 FALSE, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_dont, /* complain_on_overflow */
747 ppc64_elf_sectoff_ha_reloc, /* special_function */
748 "R_PPC64_SECTOFF_HA", /* name */
749 FALSE, /* partial_inplace */
750 0, /* src_mask */
751 0xffff, /* dst_mask */
752 FALSE), /* pcrel_offset */
753
754 /* Like R_PPC64_REL24 without touching the two least significant bits. */
755 HOWTO (R_PPC64_REL30, /* type */
756 2, /* rightshift */
757 2, /* size (0 = byte, 1 = short, 2 = long) */
758 30, /* bitsize */
759 TRUE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_dont, /* complain_on_overflow */
762 bfd_elf_generic_reloc, /* special_function */
763 "R_PPC64_REL30", /* name */
764 FALSE, /* partial_inplace */
765 0, /* src_mask */
766 0xfffffffc, /* dst_mask */
767 TRUE), /* pcrel_offset */
768
769 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
770
771 /* A standard 64-bit relocation. */
772 HOWTO (R_PPC64_ADDR64, /* type */
773 0, /* rightshift */
774 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
775 64, /* bitsize */
776 FALSE, /* pc_relative */
777 0, /* bitpos */
778 complain_overflow_dont, /* complain_on_overflow */
779 bfd_elf_generic_reloc, /* special_function */
780 "R_PPC64_ADDR64", /* name */
781 FALSE, /* partial_inplace */
782 0, /* src_mask */
783 ONES (64), /* dst_mask */
784 FALSE), /* pcrel_offset */
785
786 /* The bits 32-47 of an address. */
787 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
788 32, /* rightshift */
789 1, /* size (0 = byte, 1 = short, 2 = long) */
790 16, /* bitsize */
791 FALSE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_dont, /* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_PPC64_ADDR16_HIGHER", /* name */
796 FALSE, /* partial_inplace */
797 0, /* src_mask */
798 0xffff, /* dst_mask */
799 FALSE), /* pcrel_offset */
800
801 /* The bits 32-47 of an address, plus 1 if the contents of the low
802 16 bits, treated as a signed number, is negative. */
803 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
804 32, /* rightshift */
805 1, /* size (0 = byte, 1 = short, 2 = long) */
806 16, /* bitsize */
807 FALSE, /* pc_relative */
808 0, /* bitpos */
809 complain_overflow_dont, /* complain_on_overflow */
810 ppc64_elf_ha_reloc, /* special_function */
811 "R_PPC64_ADDR16_HIGHERA", /* name */
812 FALSE, /* partial_inplace */
813 0, /* src_mask */
814 0xffff, /* dst_mask */
815 FALSE), /* pcrel_offset */
816
817 /* The bits 48-63 of an address. */
818 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
819 48, /* rightshift */
820 1, /* size (0 = byte, 1 = short, 2 = long) */
821 16, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 bfd_elf_generic_reloc, /* special_function */
826 "R_PPC64_ADDR16_HIGHEST", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* The bits 48-63 of an address, plus 1 if the contents of the low
833 16 bits, treated as a signed number, is negative. */
834 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
835 48, /* rightshift */
836 1, /* size (0 = byte, 1 = short, 2 = long) */
837 16, /* bitsize */
838 FALSE, /* pc_relative */
839 0, /* bitpos */
840 complain_overflow_dont, /* complain_on_overflow */
841 ppc64_elf_ha_reloc, /* special_function */
842 "R_PPC64_ADDR16_HIGHESTA", /* name */
843 FALSE, /* partial_inplace */
844 0, /* src_mask */
845 0xffff, /* dst_mask */
846 FALSE), /* pcrel_offset */
847
848 /* Like ADDR64, but may be unaligned. */
849 HOWTO (R_PPC64_UADDR64, /* type */
850 0, /* rightshift */
851 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
852 64, /* bitsize */
853 FALSE, /* pc_relative */
854 0, /* bitpos */
855 complain_overflow_dont, /* complain_on_overflow */
856 bfd_elf_generic_reloc, /* special_function */
857 "R_PPC64_UADDR64", /* name */
858 FALSE, /* partial_inplace */
859 0, /* src_mask */
860 ONES (64), /* dst_mask */
861 FALSE), /* pcrel_offset */
862
863 /* 64-bit relative relocation. */
864 HOWTO (R_PPC64_REL64, /* type */
865 0, /* rightshift */
866 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
867 64, /* bitsize */
868 TRUE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 bfd_elf_generic_reloc, /* special_function */
872 "R_PPC64_REL64", /* name */
873 FALSE, /* partial_inplace */
874 0, /* src_mask */
875 ONES (64), /* dst_mask */
876 TRUE), /* pcrel_offset */
877
878 /* 64-bit relocation to the symbol's procedure linkage table. */
879 HOWTO (R_PPC64_PLT64, /* type */
880 0, /* rightshift */
881 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
882 64, /* bitsize */
883 FALSE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont, /* complain_on_overflow */
886 ppc64_elf_unhandled_reloc, /* special_function */
887 "R_PPC64_PLT64", /* name */
888 FALSE, /* partial_inplace */
889 0, /* src_mask */
890 ONES (64), /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* 64-bit PC relative relocation to the symbol's procedure linkage
894 table. */
895 /* FIXME: R_PPC64_PLTREL64 not supported. */
896 HOWTO (R_PPC64_PLTREL64, /* type */
897 0, /* rightshift */
898 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
899 64, /* bitsize */
900 TRUE, /* pc_relative */
901 0, /* bitpos */
902 complain_overflow_dont, /* complain_on_overflow */
903 ppc64_elf_unhandled_reloc, /* special_function */
904 "R_PPC64_PLTREL64", /* name */
905 FALSE, /* partial_inplace */
906 0, /* src_mask */
907 ONES (64), /* dst_mask */
908 TRUE), /* pcrel_offset */
909
910 /* 16 bit TOC-relative relocation. */
911
912 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
913 HOWTO (R_PPC64_TOC16, /* type */
914 0, /* rightshift */
915 1, /* size (0 = byte, 1 = short, 2 = long) */
916 16, /* bitsize */
917 FALSE, /* pc_relative */
918 0, /* bitpos */
919 complain_overflow_signed, /* complain_on_overflow */
920 ppc64_elf_toc_reloc, /* special_function */
921 "R_PPC64_TOC16", /* name */
922 FALSE, /* partial_inplace */
923 0, /* src_mask */
924 0xffff, /* dst_mask */
925 FALSE), /* pcrel_offset */
926
927 /* 16 bit TOC-relative relocation without overflow. */
928
929 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
930 HOWTO (R_PPC64_TOC16_LO, /* type */
931 0, /* rightshift */
932 1, /* size (0 = byte, 1 = short, 2 = long) */
933 16, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 ppc64_elf_toc_reloc, /* special_function */
938 "R_PPC64_TOC16_LO", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 0xffff, /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 16 bit TOC-relative relocation, high 16 bits. */
945
946 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
947 HOWTO (R_PPC64_TOC16_HI, /* type */
948 16, /* rightshift */
949 1, /* size (0 = byte, 1 = short, 2 = long) */
950 16, /* bitsize */
951 FALSE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc64_elf_toc_reloc, /* special_function */
955 "R_PPC64_TOC16_HI", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 0xffff, /* dst_mask */
959 FALSE), /* pcrel_offset */
960
961 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
962 contents of the low 16 bits, treated as a signed number, is
963 negative. */
964
965 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
966 HOWTO (R_PPC64_TOC16_HA, /* type */
967 16, /* rightshift */
968 1, /* size (0 = byte, 1 = short, 2 = long) */
969 16, /* bitsize */
970 FALSE, /* pc_relative */
971 0, /* bitpos */
972 complain_overflow_dont, /* complain_on_overflow */
973 ppc64_elf_toc_ha_reloc, /* special_function */
974 "R_PPC64_TOC16_HA", /* name */
975 FALSE, /* partial_inplace */
976 0, /* src_mask */
977 0xffff, /* dst_mask */
978 FALSE), /* pcrel_offset */
979
980 /* 64-bit relocation; insert value of TOC base (.TOC.). */
981
982 /* R_PPC64_TOC 51 doubleword64 .TOC. */
983 HOWTO (R_PPC64_TOC, /* type */
984 0, /* rightshift */
985 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
986 64, /* bitsize */
987 FALSE, /* pc_relative */
988 0, /* bitpos */
989 complain_overflow_bitfield, /* complain_on_overflow */
990 ppc64_elf_toc64_reloc, /* special_function */
991 "R_PPC64_TOC", /* name */
992 FALSE, /* partial_inplace */
993 0, /* src_mask */
994 ONES (64), /* dst_mask */
995 FALSE), /* pcrel_offset */
996
997 /* Like R_PPC64_GOT16, but also informs the link editor that the
998 value to relocate may (!) refer to a PLT entry which the link
999 editor (a) may replace with the symbol value. If the link editor
1000 is unable to fully resolve the symbol, it may (b) create a PLT
1001 entry and store the address to the new PLT entry in the GOT.
1002 This permits lazy resolution of function symbols at run time.
1003 The link editor may also skip all of this and just (c) emit a
1004 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1005 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1006 HOWTO (R_PPC64_PLTGOT16, /* type */
1007 0, /* rightshift */
1008 1, /* size (0 = byte, 1 = short, 2 = long) */
1009 16, /* bitsize */
1010 FALSE, /* pc_relative */
1011 0, /* bitpos */
1012 complain_overflow_signed, /* complain_on_overflow */
1013 ppc64_elf_unhandled_reloc, /* special_function */
1014 "R_PPC64_PLTGOT16", /* name */
1015 FALSE, /* partial_inplace */
1016 0, /* src_mask */
1017 0xffff, /* dst_mask */
1018 FALSE), /* pcrel_offset */
1019
1020 /* Like R_PPC64_PLTGOT16, but without overflow. */
1021 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1022 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1023 0, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_dont, /* complain_on_overflow */
1029 ppc64_elf_unhandled_reloc, /* special_function */
1030 "R_PPC64_PLTGOT16_LO", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1037 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1038 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1039 16, /* rightshift */
1040 1, /* size (0 = byte, 1 = short, 2 = long) */
1041 16, /* bitsize */
1042 FALSE, /* pc_relative */
1043 0, /* bitpos */
1044 complain_overflow_dont, /* complain_on_overflow */
1045 ppc64_elf_unhandled_reloc, /* special_function */
1046 "R_PPC64_PLTGOT16_HI", /* name */
1047 FALSE, /* partial_inplace */
1048 0, /* src_mask */
1049 0xffff, /* dst_mask */
1050 FALSE), /* pcrel_offset */
1051
1052 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1053 1 if the contents of the low 16 bits, treated as a signed number,
1054 is negative. */
1055 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1056 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1057 16, /* rightshift */
1058 1, /* size (0 = byte, 1 = short, 2 = long) */
1059 16, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont,/* complain_on_overflow */
1063 ppc64_elf_unhandled_reloc, /* special_function */
1064 "R_PPC64_PLTGOT16_HA", /* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0xffff, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1071 HOWTO (R_PPC64_ADDR16_DS, /* type */
1072 0, /* rightshift */
1073 1, /* size (0 = byte, 1 = short, 2 = long) */
1074 16, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_bitfield, /* complain_on_overflow */
1078 bfd_elf_generic_reloc, /* special_function */
1079 "R_PPC64_ADDR16_DS", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0xfffc, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1086 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1087 0, /* rightshift */
1088 1, /* size (0 = byte, 1 = short, 2 = long) */
1089 16, /* bitsize */
1090 FALSE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_dont,/* complain_on_overflow */
1093 bfd_elf_generic_reloc, /* special_function */
1094 "R_PPC64_ADDR16_LO_DS",/* name */
1095 FALSE, /* partial_inplace */
1096 0, /* src_mask */
1097 0xfffc, /* dst_mask */
1098 FALSE), /* pcrel_offset */
1099
1100 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1101 HOWTO (R_PPC64_GOT16_DS, /* type */
1102 0, /* rightshift */
1103 1, /* size (0 = byte, 1 = short, 2 = long) */
1104 16, /* bitsize */
1105 FALSE, /* pc_relative */
1106 0, /* bitpos */
1107 complain_overflow_signed, /* complain_on_overflow */
1108 ppc64_elf_unhandled_reloc, /* special_function */
1109 "R_PPC64_GOT16_DS", /* name */
1110 FALSE, /* partial_inplace */
1111 0, /* src_mask */
1112 0xfffc, /* dst_mask */
1113 FALSE), /* pcrel_offset */
1114
1115 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1116 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1117 0, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_dont, /* complain_on_overflow */
1123 ppc64_elf_unhandled_reloc, /* special_function */
1124 "R_PPC64_GOT16_LO_DS", /* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xfffc, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1131 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_dont, /* complain_on_overflow */
1138 ppc64_elf_unhandled_reloc, /* special_function */
1139 "R_PPC64_PLT16_LO_DS", /* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xfffc, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1146 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1147 0, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_bitfield, /* complain_on_overflow */
1153 ppc64_elf_sectoff_reloc, /* special_function */
1154 "R_PPC64_SECTOFF_DS", /* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xfffc, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1161 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1162 0, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_dont, /* complain_on_overflow */
1168 ppc64_elf_sectoff_reloc, /* special_function */
1169 "R_PPC64_SECTOFF_LO_DS",/* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xfffc, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1176 HOWTO (R_PPC64_TOC16_DS, /* type */
1177 0, /* rightshift */
1178 1, /* size (0 = byte, 1 = short, 2 = long) */
1179 16, /* bitsize */
1180 FALSE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_signed, /* complain_on_overflow */
1183 ppc64_elf_toc_reloc, /* special_function */
1184 "R_PPC64_TOC16_DS", /* name */
1185 FALSE, /* partial_inplace */
1186 0, /* src_mask */
1187 0xfffc, /* dst_mask */
1188 FALSE), /* pcrel_offset */
1189
1190 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1191 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1192 0, /* rightshift */
1193 1, /* size (0 = byte, 1 = short, 2 = long) */
1194 16, /* bitsize */
1195 FALSE, /* pc_relative */
1196 0, /* bitpos */
1197 complain_overflow_dont, /* complain_on_overflow */
1198 ppc64_elf_toc_reloc, /* special_function */
1199 "R_PPC64_TOC16_LO_DS", /* name */
1200 FALSE, /* partial_inplace */
1201 0, /* src_mask */
1202 0xfffc, /* dst_mask */
1203 FALSE), /* pcrel_offset */
1204
1205 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1206 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1207 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1208 0, /* rightshift */
1209 1, /* size (0 = byte, 1 = short, 2 = long) */
1210 16, /* bitsize */
1211 FALSE, /* pc_relative */
1212 0, /* bitpos */
1213 complain_overflow_signed, /* complain_on_overflow */
1214 ppc64_elf_unhandled_reloc, /* special_function */
1215 "R_PPC64_PLTGOT16_DS", /* name */
1216 FALSE, /* partial_inplace */
1217 0, /* src_mask */
1218 0xfffc, /* dst_mask */
1219 FALSE), /* pcrel_offset */
1220
1221 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1222 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1223 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1224 0, /* rightshift */
1225 1, /* size (0 = byte, 1 = short, 2 = long) */
1226 16, /* bitsize */
1227 FALSE, /* pc_relative */
1228 0, /* bitpos */
1229 complain_overflow_dont, /* complain_on_overflow */
1230 ppc64_elf_unhandled_reloc, /* special_function */
1231 "R_PPC64_PLTGOT16_LO_DS",/* name */
1232 FALSE, /* partial_inplace */
1233 0, /* src_mask */
1234 0xfffc, /* dst_mask */
1235 FALSE), /* pcrel_offset */
1236
1237 /* Marker reloc for TLS. */
1238 HOWTO (R_PPC64_TLS,
1239 0, /* rightshift */
1240 2, /* size (0 = byte, 1 = short, 2 = long) */
1241 32, /* bitsize */
1242 FALSE, /* pc_relative */
1243 0, /* bitpos */
1244 complain_overflow_dont, /* complain_on_overflow */
1245 bfd_elf_generic_reloc, /* special_function */
1246 "R_PPC64_TLS", /* name */
1247 FALSE, /* partial_inplace */
1248 0, /* src_mask */
1249 0, /* dst_mask */
1250 FALSE), /* pcrel_offset */
1251
1252 /* Computes the load module index of the load module that contains the
1253 definition of its TLS sym. */
1254 HOWTO (R_PPC64_DTPMOD64,
1255 0, /* rightshift */
1256 4, /* size (0 = byte, 1 = short, 2 = long) */
1257 64, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 ppc64_elf_unhandled_reloc, /* special_function */
1262 "R_PPC64_DTPMOD64", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 ONES (64), /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 /* Computes a dtv-relative displacement, the difference between the value
1269 of sym+add and the base address of the thread-local storage block that
1270 contains the definition of sym, minus 0x8000. */
1271 HOWTO (R_PPC64_DTPREL64,
1272 0, /* rightshift */
1273 4, /* size (0 = byte, 1 = short, 2 = long) */
1274 64, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 ppc64_elf_unhandled_reloc, /* special_function */
1279 "R_PPC64_DTPREL64", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 ONES (64), /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* A 16 bit dtprel reloc. */
1286 HOWTO (R_PPC64_DTPREL16,
1287 0, /* rightshift */
1288 1, /* size (0 = byte, 1 = short, 2 = long) */
1289 16, /* bitsize */
1290 FALSE, /* pc_relative */
1291 0, /* bitpos */
1292 complain_overflow_signed, /* complain_on_overflow */
1293 ppc64_elf_unhandled_reloc, /* special_function */
1294 "R_PPC64_DTPREL16", /* name */
1295 FALSE, /* partial_inplace */
1296 0, /* src_mask */
1297 0xffff, /* dst_mask */
1298 FALSE), /* pcrel_offset */
1299
1300 /* Like DTPREL16, but no overflow. */
1301 HOWTO (R_PPC64_DTPREL16_LO,
1302 0, /* rightshift */
1303 1, /* size (0 = byte, 1 = short, 2 = long) */
1304 16, /* 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_DTPREL16_LO", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 0xffff, /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1316 HOWTO (R_PPC64_DTPREL16_HI,
1317 16, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_dont, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16_HI", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1331 HOWTO (R_PPC64_DTPREL16_HA,
1332 16, /* 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_HA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HIGHER,
1347 32, /* 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_HIGHER", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1362 32, /* 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_HIGHERA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1377 48, /* 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_HIGHEST", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1392 48, /* 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_HIGHESTA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16, but for insns with a DS field. */
1406 HOWTO (R_PPC64_DTPREL16_DS,
1407 0, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_signed, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_DS", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xfffc, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_DS, but no overflow. */
1421 HOWTO (R_PPC64_DTPREL16_LO_DS,
1422 0, /* 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_LO_DS", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xfffc, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Computes a tp-relative displacement, the difference between the value of
1436 sym+add and the value of the thread pointer (r13). */
1437 HOWTO (R_PPC64_TPREL64,
1438 0, /* rightshift */
1439 4, /* size (0 = byte, 1 = short, 2 = long) */
1440 64, /* bitsize */
1441 FALSE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_dont, /* complain_on_overflow */
1444 ppc64_elf_unhandled_reloc, /* special_function */
1445 "R_PPC64_TPREL64", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 ONES (64), /* dst_mask */
1449 FALSE), /* pcrel_offset */
1450
1451 /* A 16 bit tprel reloc. */
1452 HOWTO (R_PPC64_TPREL16,
1453 0, /* rightshift */
1454 1, /* size (0 = byte, 1 = short, 2 = long) */
1455 16, /* bitsize */
1456 FALSE, /* pc_relative */
1457 0, /* bitpos */
1458 complain_overflow_signed, /* complain_on_overflow */
1459 ppc64_elf_unhandled_reloc, /* special_function */
1460 "R_PPC64_TPREL16", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xffff, /* dst_mask */
1464 FALSE), /* pcrel_offset */
1465
1466 /* Like TPREL16, but no overflow. */
1467 HOWTO (R_PPC64_TPREL16_LO,
1468 0, /* rightshift */
1469 1, /* size (0 = byte, 1 = short, 2 = long) */
1470 16, /* 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_TPREL16_LO", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0xffff, /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* Like TPREL16_LO, but next higher group of 16 bits. */
1482 HOWTO (R_PPC64_TPREL16_HI,
1483 16, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16_HI", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16_HI, but adjust for low 16 bits. */
1497 HOWTO (R_PPC64_TPREL16_HA,
1498 16, /* 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_HA", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_HI, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HIGHER,
1513 32, /* 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_HIGHER", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HIGHERA,
1528 32, /* 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_HIGHERA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHEST,
1543 48, /* 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_HIGHEST", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1558 48, /* 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_HIGHESTA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16, but for insns with a DS field. */
1572 HOWTO (R_PPC64_TPREL16_DS,
1573 0, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_signed, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_DS", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xfffc, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_DS, but no overflow. */
1587 HOWTO (R_PPC64_TPREL16_LO_DS,
1588 0, /* 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_LO_DS", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xfffc, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1602 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1603 to the first entry relative to the TOC base (r2). */
1604 HOWTO (R_PPC64_GOT_TLSGD16,
1605 0, /* rightshift */
1606 1, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_signed, /* complain_on_overflow */
1611 ppc64_elf_unhandled_reloc, /* special_function */
1612 "R_PPC64_GOT_TLSGD16", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0xffff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* Like GOT_TLSGD16, but no overflow. */
1619 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1620 0, /* rightshift */
1621 1, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc64_elf_unhandled_reloc, /* special_function */
1627 "R_PPC64_GOT_TLSGD16_LO", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0xffff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1634 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1635 16, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_dont, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16_HI", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1650 16, /* 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_HA", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1664 with values (sym+add)@dtpmod and zero, and computes the offset to the
1665 first entry relative to the TOC base (r2). */
1666 HOWTO (R_PPC64_GOT_TLSLD16,
1667 0, /* rightshift */
1668 1, /* size (0 = byte, 1 = short, 2 = long) */
1669 16, /* bitsize */
1670 FALSE, /* pc_relative */
1671 0, /* bitpos */
1672 complain_overflow_signed, /* complain_on_overflow */
1673 ppc64_elf_unhandled_reloc, /* special_function */
1674 "R_PPC64_GOT_TLSLD16", /* name */
1675 FALSE, /* partial_inplace */
1676 0, /* src_mask */
1677 0xffff, /* dst_mask */
1678 FALSE), /* pcrel_offset */
1679
1680 /* Like GOT_TLSLD16, but no overflow. */
1681 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1682 0, /* rightshift */
1683 1, /* size (0 = byte, 1 = short, 2 = long) */
1684 16, /* bitsize */
1685 FALSE, /* pc_relative */
1686 0, /* bitpos */
1687 complain_overflow_dont, /* complain_on_overflow */
1688 ppc64_elf_unhandled_reloc, /* special_function */
1689 "R_PPC64_GOT_TLSLD16_LO", /* name */
1690 FALSE, /* partial_inplace */
1691 0, /* src_mask */
1692 0xffff, /* dst_mask */
1693 FALSE), /* pcrel_offset */
1694
1695 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1696 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1697 16, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_dont, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16_HI", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1712 16, /* 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_HA", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1726 the offset to the entry relative to the TOC base (r2). */
1727 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1728 0, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_signed, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_DTPREL16_DS", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xfffc, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_DTPREL16_DS, but no overflow. */
1742 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1743 0, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_dont, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xfffc, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1757 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1758 16, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_dont, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_HI", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xffff, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1773 16, /* 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_HA", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xffff, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1787 offset to the entry relative to the TOC base (r2). */
1788 HOWTO (R_PPC64_GOT_TPREL16_DS,
1789 0, /* rightshift */
1790 1, /* size (0 = byte, 1 = short, 2 = long) */
1791 16, /* bitsize */
1792 FALSE, /* pc_relative */
1793 0, /* bitpos */
1794 complain_overflow_signed, /* complain_on_overflow */
1795 ppc64_elf_unhandled_reloc, /* special_function */
1796 "R_PPC64_GOT_TPREL16_DS", /* name */
1797 FALSE, /* partial_inplace */
1798 0, /* src_mask */
1799 0xfffc, /* dst_mask */
1800 FALSE), /* pcrel_offset */
1801
1802 /* Like GOT_TPREL16_DS, but no overflow. */
1803 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1804 0, /* rightshift */
1805 1, /* size (0 = byte, 1 = short, 2 = long) */
1806 16, /* bitsize */
1807 FALSE, /* pc_relative */
1808 0, /* bitpos */
1809 complain_overflow_dont, /* complain_on_overflow */
1810 ppc64_elf_unhandled_reloc, /* special_function */
1811 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1812 FALSE, /* partial_inplace */
1813 0, /* src_mask */
1814 0xfffc, /* dst_mask */
1815 FALSE), /* pcrel_offset */
1816
1817 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1818 HOWTO (R_PPC64_GOT_TPREL16_HI,
1819 16, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_dont, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_HI", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xffff, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1833 HOWTO (R_PPC64_GOT_TPREL16_HA,
1834 16, /* 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_HA", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xffff, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* GNU extension to record C++ vtable hierarchy. */
1848 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1849 0, /* rightshift */
1850 0, /* size (0 = byte, 1 = short, 2 = long) */
1851 0, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 NULL, /* special_function */
1856 "R_PPC64_GNU_VTINHERIT", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* GNU extension to record C++ vtable member usage. */
1863 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1864 0, /* rightshift */
1865 0, /* size (0 = byte, 1 = short, 2 = long) */
1866 0, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 NULL, /* special_function */
1871 "R_PPC64_GNU_VTENTRY", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876 };
1877
1878 \f
1879 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1880 be done. */
1881
1882 static void
1883 ppc_howto_init (void)
1884 {
1885 unsigned int i, type;
1886
1887 for (i = 0;
1888 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1889 i++)
1890 {
1891 type = ppc64_elf_howto_raw[i].type;
1892 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1893 / sizeof (ppc64_elf_howto_table[0])));
1894 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1895 }
1896 }
1897
1898 static reloc_howto_type *
1899 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1900 bfd_reloc_code_real_type code)
1901 {
1902 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1903
1904 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1905 /* Initialize howto table if needed. */
1906 ppc_howto_init ();
1907
1908 switch (code)
1909 {
1910 default:
1911 return NULL;
1912
1913 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1914 break;
1915 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1916 break;
1917 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1918 break;
1919 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1920 break;
1921 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1922 break;
1923 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1924 break;
1925 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1926 break;
1927 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1928 break;
1929 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1930 break;
1931 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1932 break;
1933 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1934 break;
1935 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1936 break;
1937 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1938 break;
1939 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1940 break;
1941 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1942 break;
1943 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1944 break;
1945 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1946 break;
1947 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1948 break;
1949 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1950 break;
1951 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1952 break;
1953 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1954 break;
1955 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1956 break;
1957 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1958 break;
1959 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1960 break;
1961 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1962 break;
1963 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1964 break;
1965 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1966 break;
1967 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1968 break;
1969 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1970 break;
1971 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1972 break;
1973 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1974 break;
1975 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1976 break;
1977 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1978 break;
1979 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1980 break;
1981 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1982 break;
1983 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1984 break;
1985 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1986 break;
1987 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1988 break;
1989 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1990 break;
1991 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1992 break;
1993 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1994 break;
1995 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1996 break;
1997 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1998 break;
1999 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2000 break;
2001 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2002 break;
2003 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2004 break;
2005 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2006 break;
2007 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2008 break;
2009 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2010 break;
2011 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2012 break;
2013 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2014 break;
2015 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2018 break;
2019 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2020 break;
2021 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2022 break;
2023 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2024 break;
2025 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2026 break;
2027 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2028 break;
2029 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2030 break;
2031 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2032 break;
2033 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2034 break;
2035 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2036 break;
2037 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2038 break;
2039 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2040 break;
2041 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2042 break;
2043 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2044 break;
2045 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2046 break;
2047 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2048 break;
2049 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2050 break;
2051 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2052 break;
2053 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2066 break;
2067 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2068 break;
2069 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2070 break;
2071 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2072 break;
2073 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2074 break;
2075 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2076 break;
2077 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2078 break;
2079 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2080 break;
2081 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2082 break;
2083 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2084 break;
2085 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2086 break;
2087 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2088 break;
2089 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2090 break;
2091 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2092 break;
2093 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2094 break;
2095 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2096 break;
2097 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2098 break;
2099 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2100 break;
2101 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2102 break;
2103 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2104 break;
2105 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2106 break;
2107 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2108 break;
2109 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2110 break;
2111 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2112 break;
2113 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2114 break;
2115 }
2116
2117 return ppc64_elf_howto_table[r];
2118 };
2119
2120 static reloc_howto_type *
2121 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2122 const char *r_name)
2123 {
2124 unsigned int i;
2125
2126 for (i = 0;
2127 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2128 i++)
2129 if (ppc64_elf_howto_raw[i].name != NULL
2130 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2131 return &ppc64_elf_howto_raw[i];
2132
2133 return NULL;
2134 }
2135
2136 /* Set the howto pointer for a PowerPC ELF reloc. */
2137
2138 static void
2139 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2140 Elf_Internal_Rela *dst)
2141 {
2142 unsigned int type;
2143
2144 /* Initialize howto table if needed. */
2145 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2146 ppc_howto_init ();
2147
2148 type = ELF64_R_TYPE (dst->r_info);
2149 if (type >= (sizeof (ppc64_elf_howto_table)
2150 / sizeof (ppc64_elf_howto_table[0])))
2151 {
2152 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2153 abfd, (int) type);
2154 type = R_PPC64_NONE;
2155 }
2156 cache_ptr->howto = ppc64_elf_howto_table[type];
2157 }
2158
2159 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2160
2161 static bfd_reloc_status_type
2162 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2163 void *data, asection *input_section,
2164 bfd *output_bfd, char **error_message)
2165 {
2166 /* If this is a relocatable link (output_bfd test tells us), just
2167 call the generic function. Any adjustment will be done at final
2168 link time. */
2169 if (output_bfd != NULL)
2170 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2171 input_section, output_bfd, error_message);
2172
2173 /* Adjust the addend for sign extension of the low 16 bits.
2174 We won't actually be using the low 16 bits, so trashing them
2175 doesn't matter. */
2176 reloc_entry->addend += 0x8000;
2177 return bfd_reloc_continue;
2178 }
2179
2180 static bfd_reloc_status_type
2181 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2182 void *data, asection *input_section,
2183 bfd *output_bfd, char **error_message)
2184 {
2185 if (output_bfd != NULL)
2186 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2187 input_section, output_bfd, error_message);
2188
2189 if (strcmp (symbol->section->name, ".opd") == 0
2190 && (symbol->section->owner->flags & DYNAMIC) == 0)
2191 {
2192 bfd_vma dest = opd_entry_value (symbol->section,
2193 symbol->value + reloc_entry->addend,
2194 NULL, NULL);
2195 if (dest != (bfd_vma) -1)
2196 reloc_entry->addend = dest - (symbol->value
2197 + symbol->section->output_section->vma
2198 + symbol->section->output_offset);
2199 }
2200 return bfd_reloc_continue;
2201 }
2202
2203 static bfd_reloc_status_type
2204 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2205 void *data, asection *input_section,
2206 bfd *output_bfd, char **error_message)
2207 {
2208 long insn;
2209 enum elf_ppc64_reloc_type r_type;
2210 bfd_size_type octets;
2211 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2212 bfd_boolean is_power4 = FALSE;
2213
2214 /* If this is a relocatable link (output_bfd test tells us), just
2215 call the generic function. Any adjustment will be done at final
2216 link time. */
2217 if (output_bfd != NULL)
2218 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2219 input_section, output_bfd, error_message);
2220
2221 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2222 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2223 insn &= ~(0x01 << 21);
2224 r_type = reloc_entry->howto->type;
2225 if (r_type == R_PPC64_ADDR14_BRTAKEN
2226 || r_type == R_PPC64_REL14_BRTAKEN)
2227 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2228
2229 if (is_power4)
2230 {
2231 /* Set 'a' bit. This is 0b00010 in BO field for branch
2232 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2233 for branch on CTR insns (BO == 1a00t or 1a01t). */
2234 if ((insn & (0x14 << 21)) == (0x04 << 21))
2235 insn |= 0x02 << 21;
2236 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2237 insn |= 0x08 << 21;
2238 else
2239 goto out;
2240 }
2241 else
2242 {
2243 bfd_vma target = 0;
2244 bfd_vma from;
2245
2246 if (!bfd_is_com_section (symbol->section))
2247 target = symbol->value;
2248 target += symbol->section->output_section->vma;
2249 target += symbol->section->output_offset;
2250 target += reloc_entry->addend;
2251
2252 from = (reloc_entry->address
2253 + input_section->output_offset
2254 + input_section->output_section->vma);
2255
2256 /* Invert 'y' bit if not the default. */
2257 if ((bfd_signed_vma) (target - from) < 0)
2258 insn ^= 0x01 << 21;
2259 }
2260 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2261 out:
2262 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2263 input_section, output_bfd, error_message);
2264 }
2265
2266 static bfd_reloc_status_type
2267 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2268 void *data, asection *input_section,
2269 bfd *output_bfd, char **error_message)
2270 {
2271 /* If this is a relocatable link (output_bfd test tells us), just
2272 call the generic function. Any adjustment will be done at final
2273 link time. */
2274 if (output_bfd != NULL)
2275 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2276 input_section, output_bfd, error_message);
2277
2278 /* Subtract the symbol section base address. */
2279 reloc_entry->addend -= symbol->section->output_section->vma;
2280 return bfd_reloc_continue;
2281 }
2282
2283 static bfd_reloc_status_type
2284 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2285 void *data, asection *input_section,
2286 bfd *output_bfd, char **error_message)
2287 {
2288 /* If this is a relocatable link (output_bfd test tells us), just
2289 call the generic function. Any adjustment will be done at final
2290 link time. */
2291 if (output_bfd != NULL)
2292 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2293 input_section, output_bfd, error_message);
2294
2295 /* Subtract the symbol section base address. */
2296 reloc_entry->addend -= symbol->section->output_section->vma;
2297
2298 /* Adjust the addend for sign extension of the low 16 bits. */
2299 reloc_entry->addend += 0x8000;
2300 return bfd_reloc_continue;
2301 }
2302
2303 static bfd_reloc_status_type
2304 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2305 void *data, asection *input_section,
2306 bfd *output_bfd, char **error_message)
2307 {
2308 bfd_vma TOCstart;
2309
2310 /* If this is a relocatable link (output_bfd test tells us), just
2311 call the generic function. Any adjustment will be done at final
2312 link time. */
2313 if (output_bfd != NULL)
2314 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2315 input_section, output_bfd, error_message);
2316
2317 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2318 if (TOCstart == 0)
2319 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2320
2321 /* Subtract the TOC base address. */
2322 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2323 return bfd_reloc_continue;
2324 }
2325
2326 static bfd_reloc_status_type
2327 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2328 void *data, asection *input_section,
2329 bfd *output_bfd, char **error_message)
2330 {
2331 bfd_vma TOCstart;
2332
2333 /* If this is a relocatable link (output_bfd test tells us), just
2334 call the generic function. Any adjustment will be done at final
2335 link time. */
2336 if (output_bfd != NULL)
2337 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2338 input_section, output_bfd, error_message);
2339
2340 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2341 if (TOCstart == 0)
2342 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2343
2344 /* Subtract the TOC base address. */
2345 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2346
2347 /* Adjust the addend for sign extension of the low 16 bits. */
2348 reloc_entry->addend += 0x8000;
2349 return bfd_reloc_continue;
2350 }
2351
2352 static bfd_reloc_status_type
2353 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2354 void *data, asection *input_section,
2355 bfd *output_bfd, char **error_message)
2356 {
2357 bfd_vma TOCstart;
2358 bfd_size_type octets;
2359
2360 /* If this is a relocatable link (output_bfd test tells us), just
2361 call the generic function. Any adjustment will be done at final
2362 link time. */
2363 if (output_bfd != NULL)
2364 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2365 input_section, output_bfd, error_message);
2366
2367 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2368 if (TOCstart == 0)
2369 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2370
2371 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2372 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2373 return bfd_reloc_ok;
2374 }
2375
2376 static bfd_reloc_status_type
2377 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2378 void *data, asection *input_section,
2379 bfd *output_bfd, char **error_message)
2380 {
2381 /* If this is a relocatable link (output_bfd test tells us), just
2382 call the generic function. Any adjustment will be done at final
2383 link time. */
2384 if (output_bfd != NULL)
2385 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2386 input_section, output_bfd, error_message);
2387
2388 if (error_message != NULL)
2389 {
2390 static char buf[60];
2391 sprintf (buf, "generic linker can't handle %s",
2392 reloc_entry->howto->name);
2393 *error_message = buf;
2394 }
2395 return bfd_reloc_dangerous;
2396 }
2397
2398 struct ppc64_elf_obj_tdata
2399 {
2400 struct elf_obj_tdata elf;
2401
2402 /* Shortcuts to dynamic linker sections. */
2403 asection *got;
2404 asection *relgot;
2405
2406 /* Used during garbage collection. We attach global symbols defined
2407 on removed .opd entries to this section so that the sym is removed. */
2408 asection *deleted_section;
2409
2410 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2411 sections means we potentially need one of these for each input bfd. */
2412 union {
2413 bfd_signed_vma refcount;
2414 bfd_vma offset;
2415 } tlsld_got;
2416
2417 /* A copy of relocs before they are modified for --emit-relocs. */
2418 Elf_Internal_Rela *opd_relocs;
2419 };
2420
2421 #define ppc64_elf_tdata(bfd) \
2422 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2423
2424 #define ppc64_tlsld_got(bfd) \
2425 (&ppc64_elf_tdata (bfd)->tlsld_got)
2426
2427 /* Override the generic function because we store some extras. */
2428
2429 static bfd_boolean
2430 ppc64_elf_mkobject (bfd *abfd)
2431 {
2432 if (abfd->tdata.any == NULL)
2433 {
2434 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2435 abfd->tdata.any = bfd_zalloc (abfd, amt);
2436 if (abfd->tdata.any == NULL)
2437 return FALSE;
2438 }
2439 return bfd_elf_mkobject (abfd);
2440 }
2441
2442 /* Return 1 if target is one of ours. */
2443
2444 static bfd_boolean
2445 is_ppc64_elf_target (const struct bfd_target *targ)
2446 {
2447 extern const bfd_target bfd_elf64_powerpc_vec;
2448 extern const bfd_target bfd_elf64_powerpcle_vec;
2449
2450 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2451 }
2452
2453 /* Fix bad default arch selected for a 64 bit input bfd when the
2454 default is 32 bit. */
2455
2456 static bfd_boolean
2457 ppc64_elf_object_p (bfd *abfd)
2458 {
2459 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2460 {
2461 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2462
2463 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2464 {
2465 /* Relies on arch after 32 bit default being 64 bit default. */
2466 abfd->arch_info = abfd->arch_info->next;
2467 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2468 }
2469 }
2470 return TRUE;
2471 }
2472
2473 /* Support for core dump NOTE sections. */
2474
2475 static bfd_boolean
2476 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2477 {
2478 size_t offset, size;
2479
2480 if (note->descsz != 504)
2481 return FALSE;
2482
2483 /* pr_cursig */
2484 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2485
2486 /* pr_pid */
2487 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2488
2489 /* pr_reg */
2490 offset = 112;
2491 size = 384;
2492
2493 /* Make a ".reg/999" section. */
2494 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2495 size, note->descpos + offset);
2496 }
2497
2498 static bfd_boolean
2499 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2500 {
2501 if (note->descsz != 136)
2502 return FALSE;
2503
2504 elf_tdata (abfd)->core_program
2505 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2506 elf_tdata (abfd)->core_command
2507 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2508
2509 return TRUE;
2510 }
2511
2512 static char *
2513 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2514 ...)
2515 {
2516 switch (note_type)
2517 {
2518 default:
2519 return NULL;
2520
2521 case NT_PRPSINFO:
2522 {
2523 char data[136];
2524 va_list ap;
2525
2526 va_start (ap, note_type);
2527 memset (data, 0, 40);
2528 strncpy (data + 40, va_arg (ap, const char *), 16);
2529 strncpy (data + 56, va_arg (ap, const char *), 80);
2530 va_end (ap);
2531 return elfcore_write_note (abfd, buf, bufsiz,
2532 "CORE", note_type, data, sizeof (data));
2533 }
2534
2535 case NT_PRSTATUS:
2536 {
2537 char data[504];
2538 va_list ap;
2539 long pid;
2540 int cursig;
2541 const void *greg;
2542
2543 va_start (ap, note_type);
2544 memset (data, 0, 112);
2545 pid = va_arg (ap, long);
2546 bfd_put_32 (abfd, pid, data + 32);
2547 cursig = va_arg (ap, int);
2548 bfd_put_16 (abfd, cursig, data + 12);
2549 greg = va_arg (ap, const void *);
2550 memcpy (data + 112, greg, 384);
2551 memset (data + 496, 0, 8);
2552 va_end (ap);
2553 return elfcore_write_note (abfd, buf, bufsiz,
2554 "CORE", note_type, data, sizeof (data));
2555 }
2556 }
2557 }
2558
2559 /* Merge backend specific data from an object file to the output
2560 object file when linking. */
2561
2562 static bfd_boolean
2563 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2564 {
2565 /* Check if we have the same endianess. */
2566 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2567 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2568 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2569 {
2570 const char *msg;
2571
2572 if (bfd_big_endian (ibfd))
2573 msg = _("%B: compiled for a big endian system "
2574 "and target is little endian");
2575 else
2576 msg = _("%B: compiled for a little endian system "
2577 "and target is big endian");
2578
2579 (*_bfd_error_handler) (msg, ibfd);
2580
2581 bfd_set_error (bfd_error_wrong_format);
2582 return FALSE;
2583 }
2584
2585 return TRUE;
2586 }
2587
2588 /* Add extra PPC sections. */
2589
2590 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2591 {
2592 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2593 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2594 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2595 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2596 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2597 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2598 { NULL, 0, 0, 0, 0 }
2599 };
2600
2601 enum _ppc64_sec_type {
2602 sec_normal = 0,
2603 sec_opd = 1,
2604 sec_toc = 2
2605 };
2606
2607 struct _ppc64_elf_section_data
2608 {
2609 struct bfd_elf_section_data elf;
2610
2611 /* An array with one entry for each opd function descriptor. */
2612 union
2613 {
2614 /* Points to the function code section for local opd entries. */
2615 asection **opd_func_sec;
2616 /* After editing .opd, adjust references to opd local syms. */
2617 long *opd_adjust;
2618
2619 /* An array for toc sections, indexed by offset/8.
2620 Specifies the relocation symbol index used at a given toc offset. */
2621 unsigned *t_symndx;
2622 } u;
2623
2624 enum _ppc64_sec_type sec_type:2;
2625
2626 /* Flag set when small branches are detected. Used to
2627 select suitable defaults for the stub group size. */
2628 unsigned int has_14bit_branch:1;
2629 };
2630
2631 #define ppc64_elf_section_data(sec) \
2632 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2633
2634 static bfd_boolean
2635 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2636 {
2637 if (!sec->used_by_bfd)
2638 {
2639 struct _ppc64_elf_section_data *sdata;
2640 bfd_size_type amt = sizeof (*sdata);
2641
2642 sdata = bfd_zalloc (abfd, amt);
2643 if (sdata == NULL)
2644 return FALSE;
2645 sec->used_by_bfd = sdata;
2646 }
2647
2648 return _bfd_elf_new_section_hook (abfd, sec);
2649 }
2650
2651 static void *
2652 get_opd_info (asection * sec)
2653 {
2654 if (sec != NULL
2655 && ppc64_elf_section_data (sec) != NULL
2656 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2657 return ppc64_elf_section_data (sec)->u.opd_adjust;
2658 return NULL;
2659 }
2660 \f
2661 /* Parameters for the qsort hook. */
2662 static asection *synthetic_opd;
2663 static bfd_boolean synthetic_relocatable;
2664
2665 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2666
2667 static int
2668 compare_symbols (const void *ap, const void *bp)
2669 {
2670 const asymbol *a = * (const asymbol **) ap;
2671 const asymbol *b = * (const asymbol **) bp;
2672
2673 /* Section symbols first. */
2674 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2675 return -1;
2676 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2677 return 1;
2678
2679 /* then .opd symbols. */
2680 if (a->section == synthetic_opd && b->section != synthetic_opd)
2681 return -1;
2682 if (a->section != synthetic_opd && b->section == synthetic_opd)
2683 return 1;
2684
2685 /* then other code symbols. */
2686 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2687 == (SEC_CODE | SEC_ALLOC)
2688 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2689 != (SEC_CODE | SEC_ALLOC))
2690 return -1;
2691
2692 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2693 != (SEC_CODE | SEC_ALLOC)
2694 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2695 == (SEC_CODE | SEC_ALLOC))
2696 return 1;
2697
2698 if (synthetic_relocatable)
2699 {
2700 if (a->section->id < b->section->id)
2701 return -1;
2702
2703 if (a->section->id > b->section->id)
2704 return 1;
2705 }
2706
2707 if (a->value + a->section->vma < b->value + b->section->vma)
2708 return -1;
2709
2710 if (a->value + a->section->vma > b->value + b->section->vma)
2711 return 1;
2712
2713 /* For syms with the same value, prefer strong dynamic global function
2714 syms over other syms. */
2715 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2716 return -1;
2717
2718 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2719 return 1;
2720
2721 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2722 return -1;
2723
2724 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2725 return 1;
2726
2727 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2728 return -1;
2729
2730 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2731 return 1;
2732
2733 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2734 return -1;
2735
2736 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2737 return 1;
2738
2739 return 0;
2740 }
2741
2742 /* Search SYMS for a symbol of the given VALUE. */
2743
2744 static asymbol *
2745 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2746 {
2747 long mid;
2748
2749 if (id == -1)
2750 {
2751 while (lo < hi)
2752 {
2753 mid = (lo + hi) >> 1;
2754 if (syms[mid]->value + syms[mid]->section->vma < value)
2755 lo = mid + 1;
2756 else if (syms[mid]->value + syms[mid]->section->vma > value)
2757 hi = mid;
2758 else
2759 return syms[mid];
2760 }
2761 }
2762 else
2763 {
2764 while (lo < hi)
2765 {
2766 mid = (lo + hi) >> 1;
2767 if (syms[mid]->section->id < id)
2768 lo = mid + 1;
2769 else if (syms[mid]->section->id > id)
2770 hi = mid;
2771 else if (syms[mid]->value < value)
2772 lo = mid + 1;
2773 else if (syms[mid]->value > value)
2774 hi = mid;
2775 else
2776 return syms[mid];
2777 }
2778 }
2779 return NULL;
2780 }
2781
2782 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2783 entry syms. */
2784
2785 static long
2786 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2787 long static_count, asymbol **static_syms,
2788 long dyn_count, asymbol **dyn_syms,
2789 asymbol **ret)
2790 {
2791 asymbol *s;
2792 long i;
2793 long count;
2794 char *names;
2795 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2796 asection *opd;
2797 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2798 asymbol **syms;
2799
2800 *ret = NULL;
2801
2802 opd = bfd_get_section_by_name (abfd, ".opd");
2803 if (opd == NULL)
2804 return 0;
2805
2806 symcount = static_count;
2807 if (!relocatable)
2808 symcount += dyn_count;
2809 if (symcount == 0)
2810 return 0;
2811
2812 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2813 if (syms == NULL)
2814 return -1;
2815
2816 if (!relocatable && static_count != 0 && dyn_count != 0)
2817 {
2818 /* Use both symbol tables. */
2819 memcpy (syms, static_syms, static_count * sizeof (*syms));
2820 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2821 }
2822 else if (!relocatable && static_count == 0)
2823 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2824 else
2825 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2826
2827 synthetic_opd = opd;
2828 synthetic_relocatable = relocatable;
2829 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2830
2831 if (!relocatable && symcount > 1)
2832 {
2833 long j;
2834 /* Trim duplicate syms, since we may have merged the normal and
2835 dynamic symbols. Actually, we only care about syms that have
2836 different values, so trim any with the same value. */
2837 for (i = 1, j = 1; i < symcount; ++i)
2838 if (syms[i - 1]->value + syms[i - 1]->section->vma
2839 != syms[i]->value + syms[i]->section->vma)
2840 syms[j++] = syms[i];
2841 symcount = j;
2842 }
2843
2844 i = 0;
2845 if (syms[i]->section == opd)
2846 ++i;
2847 codesecsym = i;
2848
2849 for (; i < symcount; ++i)
2850 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2851 != (SEC_CODE | SEC_ALLOC))
2852 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2853 break;
2854 codesecsymend = i;
2855
2856 for (; i < symcount; ++i)
2857 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2858 break;
2859 secsymend = i;
2860
2861 for (; i < symcount; ++i)
2862 if (syms[i]->section != opd)
2863 break;
2864 opdsymend = i;
2865
2866 for (; i < symcount; ++i)
2867 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2868 != (SEC_CODE | SEC_ALLOC))
2869 break;
2870 symcount = i;
2871
2872 count = 0;
2873 if (opdsymend == secsymend)
2874 goto done;
2875
2876 if (relocatable)
2877 {
2878 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2879 arelent *r;
2880 size_t size;
2881 long relcount;
2882
2883 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2884 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2885 if (relcount == 0)
2886 goto done;
2887
2888 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2889 {
2890 count = -1;
2891 goto done;
2892 }
2893
2894 size = 0;
2895 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2896 {
2897 asymbol *sym;
2898
2899 while (r < opd->relocation + relcount
2900 && r->address < syms[i]->value + opd->vma)
2901 ++r;
2902
2903 if (r == opd->relocation + relcount)
2904 break;
2905
2906 if (r->address != syms[i]->value + opd->vma)
2907 continue;
2908
2909 if (r->howto->type != R_PPC64_ADDR64)
2910 continue;
2911
2912 sym = *r->sym_ptr_ptr;
2913 if (!sym_exists_at (syms, opdsymend, symcount,
2914 sym->section->id, sym->value + r->addend))
2915 {
2916 ++count;
2917 size += sizeof (asymbol);
2918 size += strlen (syms[i]->name) + 2;
2919 }
2920 }
2921
2922 s = *ret = bfd_malloc (size);
2923 if (s == NULL)
2924 {
2925 count = -1;
2926 goto done;
2927 }
2928
2929 names = (char *) (s + count);
2930
2931 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2932 {
2933 asymbol *sym;
2934
2935 while (r < opd->relocation + relcount
2936 && r->address < syms[i]->value + opd->vma)
2937 ++r;
2938
2939 if (r == opd->relocation + relcount)
2940 break;
2941
2942 if (r->address != syms[i]->value + opd->vma)
2943 continue;
2944
2945 if (r->howto->type != R_PPC64_ADDR64)
2946 continue;
2947
2948 sym = *r->sym_ptr_ptr;
2949 if (!sym_exists_at (syms, opdsymend, symcount,
2950 sym->section->id, sym->value + r->addend))
2951 {
2952 size_t len;
2953
2954 *s = *syms[i];
2955 s->section = sym->section;
2956 s->value = sym->value + r->addend;
2957 s->name = names;
2958 *names++ = '.';
2959 len = strlen (syms[i]->name);
2960 memcpy (names, syms[i]->name, len + 1);
2961 names += len + 1;
2962 /* Have udata.p point back to the original symbol this
2963 synthetic symbol was derived from. */
2964 s->udata.p = syms[i];
2965 s++;
2966 }
2967 }
2968 }
2969 else
2970 {
2971 bfd_byte *contents;
2972 size_t size;
2973
2974 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2975 {
2976 if (contents)
2977 {
2978 free_contents_and_exit:
2979 free (contents);
2980 }
2981 count = -1;
2982 goto done;
2983 }
2984
2985 size = 0;
2986 for (i = secsymend; i < opdsymend; ++i)
2987 {
2988 bfd_vma ent;
2989
2990 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2991 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2992 {
2993 ++count;
2994 size += sizeof (asymbol);
2995 size += strlen (syms[i]->name) + 2;
2996 }
2997 }
2998
2999 s = *ret = bfd_malloc (size);
3000 if (s == NULL)
3001 goto free_contents_and_exit;
3002
3003 names = (char *) (s + count);
3004
3005 for (i = secsymend; i < opdsymend; ++i)
3006 {
3007 bfd_vma ent;
3008
3009 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3010 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3011 {
3012 long lo, hi;
3013 size_t len;
3014 asection *sec = abfd->sections;
3015
3016 *s = *syms[i];
3017 lo = codesecsym;
3018 hi = codesecsymend;
3019 while (lo < hi)
3020 {
3021 long mid = (lo + hi) >> 1;
3022 if (syms[mid]->section->vma < ent)
3023 lo = mid + 1;
3024 else if (syms[mid]->section->vma > ent)
3025 hi = mid;
3026 else
3027 {
3028 sec = syms[mid]->section;
3029 break;
3030 }
3031 }
3032
3033 if (lo >= hi && lo > codesecsym)
3034 sec = syms[lo - 1]->section;
3035
3036 for (; sec != NULL; sec = sec->next)
3037 {
3038 if (sec->vma > ent)
3039 break;
3040 if ((sec->flags & SEC_ALLOC) == 0
3041 || (sec->flags & SEC_LOAD) == 0)
3042 break;
3043 if ((sec->flags & SEC_CODE) != 0)
3044 s->section = sec;
3045 }
3046 s->value = ent - s->section->vma;
3047 s->name = names;
3048 *names++ = '.';
3049 len = strlen (syms[i]->name);
3050 memcpy (names, syms[i]->name, len + 1);
3051 names += len + 1;
3052 /* Have udata.p point back to the original symbol this
3053 synthetic symbol was derived from. */
3054 s->udata.p = syms[i];
3055 s++;
3056 }
3057 }
3058 free (contents);
3059 }
3060
3061 done:
3062 free (syms);
3063 return count;
3064 }
3065 \f
3066 /* The following functions are specific to the ELF linker, while
3067 functions above are used generally. Those named ppc64_elf_* are
3068 called by the main ELF linker code. They appear in this file more
3069 or less in the order in which they are called. eg.
3070 ppc64_elf_check_relocs is called early in the link process,
3071 ppc64_elf_finish_dynamic_sections is one of the last functions
3072 called.
3073
3074 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3075 functions have both a function code symbol and a function descriptor
3076 symbol. A call to foo in a relocatable object file looks like:
3077
3078 . .text
3079 . x:
3080 . bl .foo
3081 . nop
3082
3083 The function definition in another object file might be:
3084
3085 . .section .opd
3086 . foo: .quad .foo
3087 . .quad .TOC.@tocbase
3088 . .quad 0
3089 .
3090 . .text
3091 . .foo: blr
3092
3093 When the linker resolves the call during a static link, the branch
3094 unsurprisingly just goes to .foo and the .opd information is unused.
3095 If the function definition is in a shared library, things are a little
3096 different: The call goes via a plt call stub, the opd information gets
3097 copied to the plt, and the linker patches the nop.
3098
3099 . x:
3100 . bl .foo_stub
3101 . ld 2,40(1)
3102 .
3103 .
3104 . .foo_stub:
3105 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3106 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3107 . std 2,40(1) # this is the general idea
3108 . ld 11,0(12)
3109 . ld 2,8(12)
3110 . mtctr 11
3111 . ld 11,16(12)
3112 . bctr
3113 .
3114 . .section .plt
3115 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3116
3117 The "reloc ()" notation is supposed to indicate that the linker emits
3118 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3119 copying.
3120
3121 What are the difficulties here? Well, firstly, the relocations
3122 examined by the linker in check_relocs are against the function code
3123 sym .foo, while the dynamic relocation in the plt is emitted against
3124 the function descriptor symbol, foo. Somewhere along the line, we need
3125 to carefully copy dynamic link information from one symbol to the other.
3126 Secondly, the generic part of the elf linker will make .foo a dynamic
3127 symbol as is normal for most other backends. We need foo dynamic
3128 instead, at least for an application final link. However, when
3129 creating a shared library containing foo, we need to have both symbols
3130 dynamic so that references to .foo are satisfied during the early
3131 stages of linking. Otherwise the linker might decide to pull in a
3132 definition from some other object, eg. a static library.
3133
3134 Update: As of August 2004, we support a new convention. Function
3135 calls may use the function descriptor symbol, ie. "bl foo". This
3136 behaves exactly as "bl .foo". */
3137
3138 /* The linker needs to keep track of the number of relocs that it
3139 decides to copy as dynamic relocs in check_relocs for each symbol.
3140 This is so that it can later discard them if they are found to be
3141 unnecessary. We store the information in a field extending the
3142 regular ELF linker hash table. */
3143
3144 struct ppc_dyn_relocs
3145 {
3146 struct ppc_dyn_relocs *next;
3147
3148 /* The input section of the reloc. */
3149 asection *sec;
3150
3151 /* Total number of relocs copied for the input section. */
3152 bfd_size_type count;
3153
3154 /* Number of pc-relative relocs copied for the input section. */
3155 bfd_size_type pc_count;
3156 };
3157
3158 /* Track GOT entries needed for a given symbol. We might need more
3159 than one got entry per symbol. */
3160 struct got_entry
3161 {
3162 struct got_entry *next;
3163
3164 /* The symbol addend that we'll be placing in the GOT. */
3165 bfd_vma addend;
3166
3167 /* Unlike other ELF targets, we use separate GOT entries for the same
3168 symbol referenced from different input files. This is to support
3169 automatic multiple TOC/GOT sections, where the TOC base can vary
3170 from one input file to another. FIXME: After group_sections we
3171 ought to merge entries within the group.
3172
3173 Point to the BFD owning this GOT entry. */
3174 bfd *owner;
3175
3176 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3177 TLS_TPREL or TLS_DTPREL for tls entries. */
3178 char tls_type;
3179
3180 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3181 union
3182 {
3183 bfd_signed_vma refcount;
3184 bfd_vma offset;
3185 } got;
3186 };
3187
3188 /* The same for PLT. */
3189 struct plt_entry
3190 {
3191 struct plt_entry *next;
3192
3193 bfd_vma addend;
3194
3195 union
3196 {
3197 bfd_signed_vma refcount;
3198 bfd_vma offset;
3199 } plt;
3200 };
3201
3202 /* Of those relocs that might be copied as dynamic relocs, this macro
3203 selects those that must be copied when linking a shared library,
3204 even when the symbol is local. */
3205
3206 #define MUST_BE_DYN_RELOC(RTYPE) \
3207 ((RTYPE) != R_PPC64_REL32 \
3208 && (RTYPE) != R_PPC64_REL64 \
3209 && (RTYPE) != R_PPC64_REL30)
3210
3211 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3212 copying dynamic variables from a shared lib into an app's dynbss
3213 section, and instead use a dynamic relocation to point into the
3214 shared lib. With code that gcc generates, it's vital that this be
3215 enabled; In the PowerPC64 ABI, the address of a function is actually
3216 the address of a function descriptor, which resides in the .opd
3217 section. gcc uses the descriptor directly rather than going via the
3218 GOT as some other ABI's do, which means that initialized function
3219 pointers must reference the descriptor. Thus, a function pointer
3220 initialized to the address of a function in a shared library will
3221 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3222 redefines the function descriptor symbol to point to the copy. This
3223 presents a problem as a plt entry for that function is also
3224 initialized from the function descriptor symbol and the copy reloc
3225 may not be initialized first. */
3226 #define ELIMINATE_COPY_RELOCS 1
3227
3228 /* Section name for stubs is the associated section name plus this
3229 string. */
3230 #define STUB_SUFFIX ".stub"
3231
3232 /* Linker stubs.
3233 ppc_stub_long_branch:
3234 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3235 destination, but a 24 bit branch in a stub section will reach.
3236 . b dest
3237
3238 ppc_stub_plt_branch:
3239 Similar to the above, but a 24 bit branch in the stub section won't
3240 reach its destination.
3241 . addis %r12,%r2,xxx@toc@ha
3242 . ld %r11,xxx@toc@l(%r12)
3243 . mtctr %r11
3244 . bctr
3245
3246 ppc_stub_plt_call:
3247 Used to call a function in a shared library. If it so happens that
3248 the plt entry referenced crosses a 64k boundary, then an extra
3249 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3250 . addis %r12,%r2,xxx@toc@ha
3251 . std %r2,40(%r1)
3252 . ld %r11,xxx+0@toc@l(%r12)
3253 . mtctr %r11
3254 . ld %r2,xxx+8@toc@l(%r12)
3255 . ld %r11,xxx+16@toc@l(%r12)
3256 . bctr
3257
3258 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3259 code to adjust the value and save r2 to support multiple toc sections.
3260 A ppc_stub_long_branch with an r2 offset looks like:
3261 . std %r2,40(%r1)
3262 . addis %r2,%r2,off@ha
3263 . addi %r2,%r2,off@l
3264 . b dest
3265
3266 A ppc_stub_plt_branch with an r2 offset looks like:
3267 . std %r2,40(%r1)
3268 . addis %r12,%r2,xxx@toc@ha
3269 . ld %r11,xxx@toc@l(%r12)
3270 . addis %r2,%r2,off@ha
3271 . addi %r2,%r2,off@l
3272 . mtctr %r11
3273 . bctr
3274
3275 In cases where the "addis" instruction would add zero, the "addis" is
3276 omitted and following instructions modified slightly in some cases.
3277 */
3278
3279 enum ppc_stub_type {
3280 ppc_stub_none,
3281 ppc_stub_long_branch,
3282 ppc_stub_long_branch_r2off,
3283 ppc_stub_plt_branch,
3284 ppc_stub_plt_branch_r2off,
3285 ppc_stub_plt_call
3286 };
3287
3288 struct ppc_stub_hash_entry {
3289
3290 /* Base hash table entry structure. */
3291 struct bfd_hash_entry root;
3292
3293 enum ppc_stub_type stub_type;
3294
3295 /* The stub section. */
3296 asection *stub_sec;
3297
3298 /* Offset within stub_sec of the beginning of this stub. */
3299 bfd_vma stub_offset;
3300
3301 /* Given the symbol's value and its section we can determine its final
3302 value when building the stubs (so the stub knows where to jump. */
3303 bfd_vma target_value;
3304 asection *target_section;
3305
3306 /* The symbol table entry, if any, that this was derived from. */
3307 struct ppc_link_hash_entry *h;
3308
3309 /* And the reloc addend that this was derived from. */
3310 bfd_vma addend;
3311
3312 /* Where this stub is being called from, or, in the case of combined
3313 stub sections, the first input section in the group. */
3314 asection *id_sec;
3315 };
3316
3317 struct ppc_branch_hash_entry {
3318
3319 /* Base hash table entry structure. */
3320 struct bfd_hash_entry root;
3321
3322 /* Offset within branch lookup table. */
3323 unsigned int offset;
3324
3325 /* Generation marker. */
3326 unsigned int iter;
3327 };
3328
3329 struct ppc_link_hash_entry
3330 {
3331 struct elf_link_hash_entry elf;
3332
3333 union {
3334 /* A pointer to the most recently used stub hash entry against this
3335 symbol. */
3336 struct ppc_stub_hash_entry *stub_cache;
3337
3338 /* A pointer to the next symbol starting with a '.' */
3339 struct ppc_link_hash_entry *next_dot_sym;
3340 } u;
3341
3342 /* Track dynamic relocs copied for this symbol. */
3343 struct ppc_dyn_relocs *dyn_relocs;
3344
3345 /* Link between function code and descriptor symbols. */
3346 struct ppc_link_hash_entry *oh;
3347
3348 /* Flag function code and descriptor symbols. */
3349 unsigned int is_func:1;
3350 unsigned int is_func_descriptor:1;
3351 unsigned int fake:1;
3352
3353 /* Whether global opd/toc sym has been adjusted or not.
3354 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3355 should be set for all globals defined in any opd/toc section. */
3356 unsigned int adjust_done:1;
3357
3358 /* Set if we twiddled this symbol to weak at some stage. */
3359 unsigned int was_undefined:1;
3360
3361 /* Contexts in which symbol is used in the GOT (or TOC).
3362 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3363 corresponding relocs are encountered during check_relocs.
3364 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3365 indicate the corresponding GOT entry type is not needed.
3366 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3367 a TPREL one. We use a separate flag rather than setting TPREL
3368 just for convenience in distinguishing the two cases. */
3369 #define TLS_GD 1 /* GD reloc. */
3370 #define TLS_LD 2 /* LD reloc. */
3371 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3372 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3373 #define TLS_TLS 16 /* Any TLS reloc. */
3374 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3375 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3376 char tls_mask;
3377 };
3378
3379 /* ppc64 ELF linker hash table. */
3380
3381 struct ppc_link_hash_table
3382 {
3383 struct elf_link_hash_table elf;
3384
3385 /* The stub hash table. */
3386 struct bfd_hash_table stub_hash_table;
3387
3388 /* Another hash table for plt_branch stubs. */
3389 struct bfd_hash_table branch_hash_table;
3390
3391 /* Linker stub bfd. */
3392 bfd *stub_bfd;
3393
3394 /* Linker call-backs. */
3395 asection * (*add_stub_section) (const char *, asection *);
3396 void (*layout_sections_again) (void);
3397
3398 /* Array to keep track of which stub sections have been created, and
3399 information on stub grouping. */
3400 struct map_stub {
3401 /* This is the section to which stubs in the group will be attached. */
3402 asection *link_sec;
3403 /* The stub section. */
3404 asection *stub_sec;
3405 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3406 bfd_vma toc_off;
3407 } *stub_group;
3408
3409 /* Temp used when calculating TOC pointers. */
3410 bfd_vma toc_curr;
3411
3412 /* Highest input section id. */
3413 int top_id;
3414
3415 /* Highest output section index. */
3416 int top_index;
3417
3418 /* Used when adding symbols. */
3419 struct ppc_link_hash_entry *dot_syms;
3420
3421 /* List of input sections for each output section. */
3422 asection **input_list;
3423
3424 /* Short-cuts to get to dynamic linker sections. */
3425 asection *got;
3426 asection *plt;
3427 asection *relplt;
3428 asection *dynbss;
3429 asection *relbss;
3430 asection *glink;
3431 asection *sfpr;
3432 asection *brlt;
3433 asection *relbrlt;
3434
3435 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3436 struct ppc_link_hash_entry *tls_get_addr;
3437 struct ppc_link_hash_entry *tls_get_addr_fd;
3438
3439 /* Statistics. */
3440 unsigned long stub_count[ppc_stub_plt_call];
3441
3442 /* Number of stubs against global syms. */
3443 unsigned long stub_globals;
3444
3445 /* Set if we should emit symbols for stubs. */
3446 unsigned int emit_stub_syms:1;
3447
3448 /* Support for multiple toc sections. */
3449 unsigned int no_multi_toc:1;
3450 unsigned int multi_toc_needed:1;
3451
3452 /* Set on error. */
3453 unsigned int stub_error:1;
3454
3455 /* Temp used by ppc64_elf_check_directives. */
3456 unsigned int twiddled_syms:1;
3457
3458 /* Incremented every time we size stubs. */
3459 unsigned int stub_iteration;
3460
3461 /* Small local sym to section mapping cache. */
3462 struct sym_sec_cache sym_sec;
3463 };
3464
3465 /* Rename some of the generic section flags to better document how they
3466 are used here. */
3467 #define has_toc_reloc has_gp_reloc
3468 #define makes_toc_func_call need_finalize_relax
3469 #define call_check_in_progress reloc_done
3470
3471 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3472
3473 #define ppc_hash_table(p) \
3474 ((struct ppc_link_hash_table *) ((p)->hash))
3475
3476 #define ppc_stub_hash_lookup(table, string, create, copy) \
3477 ((struct ppc_stub_hash_entry *) \
3478 bfd_hash_lookup ((table), (string), (create), (copy)))
3479
3480 #define ppc_branch_hash_lookup(table, string, create, copy) \
3481 ((struct ppc_branch_hash_entry *) \
3482 bfd_hash_lookup ((table), (string), (create), (copy)))
3483
3484 /* Create an entry in the stub hash table. */
3485
3486 static struct bfd_hash_entry *
3487 stub_hash_newfunc (struct bfd_hash_entry *entry,
3488 struct bfd_hash_table *table,
3489 const char *string)
3490 {
3491 /* Allocate the structure if it has not already been allocated by a
3492 subclass. */
3493 if (entry == NULL)
3494 {
3495 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3496 if (entry == NULL)
3497 return entry;
3498 }
3499
3500 /* Call the allocation method of the superclass. */
3501 entry = bfd_hash_newfunc (entry, table, string);
3502 if (entry != NULL)
3503 {
3504 struct ppc_stub_hash_entry *eh;
3505
3506 /* Initialize the local fields. */
3507 eh = (struct ppc_stub_hash_entry *) entry;
3508 eh->stub_type = ppc_stub_none;
3509 eh->stub_sec = NULL;
3510 eh->stub_offset = 0;
3511 eh->target_value = 0;
3512 eh->target_section = NULL;
3513 eh->h = NULL;
3514 eh->id_sec = NULL;
3515 }
3516
3517 return entry;
3518 }
3519
3520 /* Create an entry in the branch hash table. */
3521
3522 static struct bfd_hash_entry *
3523 branch_hash_newfunc (struct bfd_hash_entry *entry,
3524 struct bfd_hash_table *table,
3525 const char *string)
3526 {
3527 /* Allocate the structure if it has not already been allocated by a
3528 subclass. */
3529 if (entry == NULL)
3530 {
3531 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3532 if (entry == NULL)
3533 return entry;
3534 }
3535
3536 /* Call the allocation method of the superclass. */
3537 entry = bfd_hash_newfunc (entry, table, string);
3538 if (entry != NULL)
3539 {
3540 struct ppc_branch_hash_entry *eh;
3541
3542 /* Initialize the local fields. */
3543 eh = (struct ppc_branch_hash_entry *) entry;
3544 eh->offset = 0;
3545 eh->iter = 0;
3546 }
3547
3548 return entry;
3549 }
3550
3551 /* Create an entry in a ppc64 ELF linker hash table. */
3552
3553 static struct bfd_hash_entry *
3554 link_hash_newfunc (struct bfd_hash_entry *entry,
3555 struct bfd_hash_table *table,
3556 const char *string)
3557 {
3558 /* Allocate the structure if it has not already been allocated by a
3559 subclass. */
3560 if (entry == NULL)
3561 {
3562 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3563 if (entry == NULL)
3564 return entry;
3565 }
3566
3567 /* Call the allocation method of the superclass. */
3568 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3569 if (entry != NULL)
3570 {
3571 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3572
3573 memset (&eh->u.stub_cache, 0,
3574 (sizeof (struct ppc_link_hash_entry)
3575 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3576
3577 /* When making function calls, old ABI code references function entry
3578 points (dot symbols), while new ABI code references the function
3579 descriptor symbol. We need to make any combination of reference and
3580 definition work together, without breaking archive linking.
3581
3582 For a defined function "foo" and an undefined call to "bar":
3583 An old object defines "foo" and ".foo", references ".bar" (possibly
3584 "bar" too).
3585 A new object defines "foo" and references "bar".
3586
3587 A new object thus has no problem with its undefined symbols being
3588 satisfied by definitions in an old object. On the other hand, the
3589 old object won't have ".bar" satisfied by a new object.
3590
3591 Keep a list of newly added dot-symbols. */
3592
3593 if (string[0] == '.')
3594 {
3595 struct ppc_link_hash_table *htab;
3596
3597 htab = (struct ppc_link_hash_table *) table;
3598 eh->u.next_dot_sym = htab->dot_syms;
3599 htab->dot_syms = eh;
3600 }
3601 }
3602
3603 return entry;
3604 }
3605
3606 /* Create a ppc64 ELF linker hash table. */
3607
3608 static struct bfd_link_hash_table *
3609 ppc64_elf_link_hash_table_create (bfd *abfd)
3610 {
3611 struct ppc_link_hash_table *htab;
3612 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3613
3614 htab = bfd_zmalloc (amt);
3615 if (htab == NULL)
3616 return NULL;
3617
3618 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3619 sizeof (struct ppc_link_hash_entry)))
3620 {
3621 free (htab);
3622 return NULL;
3623 }
3624
3625 /* Init the stub hash table too. */
3626 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3627 sizeof (struct ppc_stub_hash_entry)))
3628 return NULL;
3629
3630 /* And the branch hash table. */
3631 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3632 sizeof (struct ppc_branch_hash_entry)))
3633 return NULL;
3634
3635 /* Initializing two fields of the union is just cosmetic. We really
3636 only care about glist, but when compiled on a 32-bit host the
3637 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3638 debugger inspection of these fields look nicer. */
3639 htab->elf.init_got_refcount.refcount = 0;
3640 htab->elf.init_got_refcount.glist = NULL;
3641 htab->elf.init_plt_refcount.refcount = 0;
3642 htab->elf.init_plt_refcount.glist = NULL;
3643 htab->elf.init_got_offset.offset = 0;
3644 htab->elf.init_got_offset.glist = NULL;
3645 htab->elf.init_plt_offset.offset = 0;
3646 htab->elf.init_plt_offset.glist = NULL;
3647
3648 return &htab->elf.root;
3649 }
3650
3651 /* Free the derived linker hash table. */
3652
3653 static void
3654 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3655 {
3656 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3657
3658 bfd_hash_table_free (&ret->stub_hash_table);
3659 bfd_hash_table_free (&ret->branch_hash_table);
3660 _bfd_generic_link_hash_table_free (hash);
3661 }
3662
3663 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3664
3665 void
3666 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3667 {
3668 struct ppc_link_hash_table *htab;
3669
3670 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3671
3672 /* Always hook our dynamic sections into the first bfd, which is the
3673 linker created stub bfd. This ensures that the GOT header is at
3674 the start of the output TOC section. */
3675 htab = ppc_hash_table (info);
3676 htab->stub_bfd = abfd;
3677 htab->elf.dynobj = abfd;
3678 }
3679
3680 /* Build a name for an entry in the stub hash table. */
3681
3682 static char *
3683 ppc_stub_name (const asection *input_section,
3684 const asection *sym_sec,
3685 const struct ppc_link_hash_entry *h,
3686 const Elf_Internal_Rela *rel)
3687 {
3688 char *stub_name;
3689 bfd_size_type len;
3690
3691 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3692 offsets from a sym as a branch target? In fact, we could
3693 probably assume the addend is always zero. */
3694 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3695
3696 if (h)
3697 {
3698 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3699 stub_name = bfd_malloc (len);
3700 if (stub_name == NULL)
3701 return stub_name;
3702
3703 sprintf (stub_name, "%08x.%s+%x",
3704 input_section->id & 0xffffffff,
3705 h->elf.root.root.string,
3706 (int) rel->r_addend & 0xffffffff);
3707 }
3708 else
3709 {
3710 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3711 stub_name = bfd_malloc (len);
3712 if (stub_name == NULL)
3713 return stub_name;
3714
3715 sprintf (stub_name, "%08x.%x:%x+%x",
3716 input_section->id & 0xffffffff,
3717 sym_sec->id & 0xffffffff,
3718 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3719 (int) rel->r_addend & 0xffffffff);
3720 }
3721 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3722 stub_name[len - 2] = 0;
3723 return stub_name;
3724 }
3725
3726 /* Look up an entry in the stub hash. Stub entries are cached because
3727 creating the stub name takes a bit of time. */
3728
3729 static struct ppc_stub_hash_entry *
3730 ppc_get_stub_entry (const asection *input_section,
3731 const asection *sym_sec,
3732 struct ppc_link_hash_entry *h,
3733 const Elf_Internal_Rela *rel,
3734 struct ppc_link_hash_table *htab)
3735 {
3736 struct ppc_stub_hash_entry *stub_entry;
3737 const asection *id_sec;
3738
3739 /* If this input section is part of a group of sections sharing one
3740 stub section, then use the id of the first section in the group.
3741 Stub names need to include a section id, as there may well be
3742 more than one stub used to reach say, printf, and we need to
3743 distinguish between them. */
3744 id_sec = htab->stub_group[input_section->id].link_sec;
3745
3746 if (h != NULL && h->u.stub_cache != NULL
3747 && h->u.stub_cache->h == h
3748 && h->u.stub_cache->id_sec == id_sec)
3749 {
3750 stub_entry = h->u.stub_cache;
3751 }
3752 else
3753 {
3754 char *stub_name;
3755
3756 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3757 if (stub_name == NULL)
3758 return NULL;
3759
3760 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3761 stub_name, FALSE, FALSE);
3762 if (h != NULL)
3763 h->u.stub_cache = stub_entry;
3764
3765 free (stub_name);
3766 }
3767
3768 return stub_entry;
3769 }
3770
3771 /* Add a new stub entry to the stub hash. Not all fields of the new
3772 stub entry are initialised. */
3773
3774 static struct ppc_stub_hash_entry *
3775 ppc_add_stub (const char *stub_name,
3776 asection *section,
3777 struct ppc_link_hash_table *htab)
3778 {
3779 asection *link_sec;
3780 asection *stub_sec;
3781 struct ppc_stub_hash_entry *stub_entry;
3782
3783 link_sec = htab->stub_group[section->id].link_sec;
3784 stub_sec = htab->stub_group[section->id].stub_sec;
3785 if (stub_sec == NULL)
3786 {
3787 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3788 if (stub_sec == NULL)
3789 {
3790 size_t namelen;
3791 bfd_size_type len;
3792 char *s_name;
3793
3794 namelen = strlen (link_sec->name);
3795 len = namelen + sizeof (STUB_SUFFIX);
3796 s_name = bfd_alloc (htab->stub_bfd, len);
3797 if (s_name == NULL)
3798 return NULL;
3799
3800 memcpy (s_name, link_sec->name, namelen);
3801 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3802 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3803 if (stub_sec == NULL)
3804 return NULL;
3805 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3806 }
3807 htab->stub_group[section->id].stub_sec = stub_sec;
3808 }
3809
3810 /* Enter this entry into the linker stub hash table. */
3811 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3812 TRUE, FALSE);
3813 if (stub_entry == NULL)
3814 {
3815 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3816 section->owner, stub_name);
3817 return NULL;
3818 }
3819
3820 stub_entry->stub_sec = stub_sec;
3821 stub_entry->stub_offset = 0;
3822 stub_entry->id_sec = link_sec;
3823 return stub_entry;
3824 }
3825
3826 /* Create sections for linker generated code. */
3827
3828 static bfd_boolean
3829 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3830 {
3831 struct ppc_link_hash_table *htab;
3832 flagword flags;
3833
3834 htab = ppc_hash_table (info);
3835
3836 /* Create .sfpr for code to save and restore fp regs. */
3837 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3838 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3839 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3840 flags);
3841 if (htab->sfpr == NULL
3842 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3843 return FALSE;
3844
3845 /* Create .glink for lazy dynamic linking support. */
3846 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3847 flags);
3848 if (htab->glink == NULL
3849 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3850 return FALSE;
3851
3852 /* Create branch lookup table for plt_branch stubs. */
3853 flags = (SEC_ALLOC | SEC_LOAD
3854 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3855 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3856 flags);
3857 if (htab->brlt == NULL
3858 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3859 return FALSE;
3860
3861 if (!info->shared)
3862 return TRUE;
3863
3864 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3865 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3866 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3867 ".rela.branch_lt",
3868 flags);
3869 if (!htab->relbrlt
3870 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3871 return FALSE;
3872
3873 return TRUE;
3874 }
3875
3876 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3877 not already done. */
3878
3879 static bfd_boolean
3880 create_got_section (bfd *abfd, struct bfd_link_info *info)
3881 {
3882 asection *got, *relgot;
3883 flagword flags;
3884 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3885
3886 if (!htab->got)
3887 {
3888 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3889 return FALSE;
3890
3891 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3892 if (!htab->got)
3893 abort ();
3894 }
3895
3896 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3897 | SEC_LINKER_CREATED);
3898
3899 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3900 if (!got
3901 || !bfd_set_section_alignment (abfd, got, 3))
3902 return FALSE;
3903
3904 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3905 flags | SEC_READONLY);
3906 if (!relgot
3907 || ! bfd_set_section_alignment (abfd, relgot, 3))
3908 return FALSE;
3909
3910 ppc64_elf_tdata (abfd)->got = got;
3911 ppc64_elf_tdata (abfd)->relgot = relgot;
3912 return TRUE;
3913 }
3914
3915 /* Create the dynamic sections, and set up shortcuts. */
3916
3917 static bfd_boolean
3918 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3919 {
3920 struct ppc_link_hash_table *htab;
3921
3922 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3923 return FALSE;
3924
3925 htab = ppc_hash_table (info);
3926 if (!htab->got)
3927 htab->got = bfd_get_section_by_name (dynobj, ".got");
3928 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3929 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3930 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3931 if (!info->shared)
3932 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3933
3934 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3935 || (!info->shared && !htab->relbss))
3936 abort ();
3937
3938 return TRUE;
3939 }
3940
3941 /* Merge PLT info on FROM with that on TO. */
3942
3943 static void
3944 move_plt_plist (struct ppc_link_hash_entry *from,
3945 struct ppc_link_hash_entry *to)
3946 {
3947 if (from->elf.plt.plist != NULL)
3948 {
3949 if (to->elf.plt.plist != NULL)
3950 {
3951 struct plt_entry **entp;
3952 struct plt_entry *ent;
3953
3954 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3955 {
3956 struct plt_entry *dent;
3957
3958 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3959 if (dent->addend == ent->addend)
3960 {
3961 dent->plt.refcount += ent->plt.refcount;
3962 *entp = ent->next;
3963 break;
3964 }
3965 if (dent == NULL)
3966 entp = &ent->next;
3967 }
3968 *entp = to->elf.plt.plist;
3969 }
3970
3971 to->elf.plt.plist = from->elf.plt.plist;
3972 from->elf.plt.plist = NULL;
3973 }
3974 }
3975
3976 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3977
3978 static void
3979 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3980 struct elf_link_hash_entry *dir,
3981 struct elf_link_hash_entry *ind)
3982 {
3983 struct ppc_link_hash_entry *edir, *eind;
3984
3985 edir = (struct ppc_link_hash_entry *) dir;
3986 eind = (struct ppc_link_hash_entry *) ind;
3987
3988 /* Copy over any dynamic relocs we may have on the indirect sym. */
3989 if (eind->dyn_relocs != NULL)
3990 {
3991 if (edir->dyn_relocs != NULL)
3992 {
3993 struct ppc_dyn_relocs **pp;
3994 struct ppc_dyn_relocs *p;
3995
3996 /* Add reloc counts against the indirect sym to the direct sym
3997 list. Merge any entries against the same section. */
3998 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3999 {
4000 struct ppc_dyn_relocs *q;
4001
4002 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4003 if (q->sec == p->sec)
4004 {
4005 q->pc_count += p->pc_count;
4006 q->count += p->count;
4007 *pp = p->next;
4008 break;
4009 }
4010 if (q == NULL)
4011 pp = &p->next;
4012 }
4013 *pp = edir->dyn_relocs;
4014 }
4015
4016 edir->dyn_relocs = eind->dyn_relocs;
4017 eind->dyn_relocs = NULL;
4018 }
4019
4020 edir->is_func |= eind->is_func;
4021 edir->is_func_descriptor |= eind->is_func_descriptor;
4022 edir->tls_mask |= eind->tls_mask;
4023
4024 /* If called to transfer flags for a weakdef during processing
4025 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4026 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4027 if (!(ELIMINATE_COPY_RELOCS
4028 && eind->elf.root.type != bfd_link_hash_indirect
4029 && edir->elf.dynamic_adjusted))
4030 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4031
4032 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4033 edir->elf.ref_regular |= eind->elf.ref_regular;
4034 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4035 edir->elf.needs_plt |= eind->elf.needs_plt;
4036
4037 /* If we were called to copy over info for a weak sym, that's all. */
4038 if (eind->elf.root.type != bfd_link_hash_indirect)
4039 return;
4040
4041 /* Copy over got entries that we may have already seen to the
4042 symbol which just became indirect. */
4043 if (eind->elf.got.glist != NULL)
4044 {
4045 if (edir->elf.got.glist != NULL)
4046 {
4047 struct got_entry **entp;
4048 struct got_entry *ent;
4049
4050 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4051 {
4052 struct got_entry *dent;
4053
4054 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4055 if (dent->addend == ent->addend
4056 && dent->owner == ent->owner
4057 && dent->tls_type == ent->tls_type)
4058 {
4059 dent->got.refcount += ent->got.refcount;
4060 *entp = ent->next;
4061 break;
4062 }
4063 if (dent == NULL)
4064 entp = &ent->next;
4065 }
4066 *entp = edir->elf.got.glist;
4067 }
4068
4069 edir->elf.got.glist = eind->elf.got.glist;
4070 eind->elf.got.glist = NULL;
4071 }
4072
4073 /* And plt entries. */
4074 move_plt_plist (eind, edir);
4075
4076 if (eind->elf.dynindx != -1)
4077 {
4078 if (edir->elf.dynindx != -1)
4079 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4080 edir->elf.dynstr_index);
4081 edir->elf.dynindx = eind->elf.dynindx;
4082 edir->elf.dynstr_index = eind->elf.dynstr_index;
4083 eind->elf.dynindx = -1;
4084 eind->elf.dynstr_index = 0;
4085 }
4086 }
4087
4088 /* Find the function descriptor hash entry from the given function code
4089 hash entry FH. Link the entries via their OH fields. */
4090
4091 static struct ppc_link_hash_entry *
4092 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4093 {
4094 struct ppc_link_hash_entry *fdh = fh->oh;
4095
4096 if (fdh == NULL)
4097 {
4098 const char *fd_name = fh->elf.root.root.string + 1;
4099
4100 fdh = (struct ppc_link_hash_entry *)
4101 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4102 if (fdh != NULL)
4103 {
4104 fdh->is_func_descriptor = 1;
4105 fdh->oh = fh;
4106 fh->is_func = 1;
4107 fh->oh = fdh;
4108 }
4109 }
4110
4111 return fdh;
4112 }
4113
4114 /* Make a fake function descriptor sym for the code sym FH. */
4115
4116 static struct ppc_link_hash_entry *
4117 make_fdh (struct bfd_link_info *info,
4118 struct ppc_link_hash_entry *fh)
4119 {
4120 bfd *abfd;
4121 asymbol *newsym;
4122 struct bfd_link_hash_entry *bh;
4123 struct ppc_link_hash_entry *fdh;
4124
4125 abfd = fh->elf.root.u.undef.abfd;
4126 newsym = bfd_make_empty_symbol (abfd);
4127 newsym->name = fh->elf.root.root.string + 1;
4128 newsym->section = bfd_und_section_ptr;
4129 newsym->value = 0;
4130 newsym->flags = BSF_WEAK;
4131
4132 bh = NULL;
4133 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4134 newsym->flags, newsym->section,
4135 newsym->value, NULL, FALSE, FALSE,
4136 &bh))
4137 return NULL;
4138
4139 fdh = (struct ppc_link_hash_entry *) bh;
4140 fdh->elf.non_elf = 0;
4141 fdh->fake = 1;
4142 fdh->is_func_descriptor = 1;
4143 fdh->oh = fh;
4144 fh->is_func = 1;
4145 fh->oh = fdh;
4146 return fdh;
4147 }
4148
4149 /* Fix function descriptor symbols defined in .opd sections to be
4150 function type. */
4151
4152 static bfd_boolean
4153 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4154 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4155 Elf_Internal_Sym *isym,
4156 const char **name ATTRIBUTE_UNUSED,
4157 flagword *flags ATTRIBUTE_UNUSED,
4158 asection **sec,
4159 bfd_vma *value ATTRIBUTE_UNUSED)
4160 {
4161 if (*sec != NULL
4162 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4163 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4164
4165 return TRUE;
4166 }
4167
4168 /* This function makes an old ABI object reference to ".bar" cause the
4169 inclusion of a new ABI object archive that defines "bar".
4170 NAME is a symbol defined in an archive. Return a symbol in the hash
4171 table that might be satisfied by the archive symbols. */
4172
4173 static struct elf_link_hash_entry *
4174 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4175 struct bfd_link_info *info,
4176 const char *name)
4177 {
4178 struct elf_link_hash_entry *h;
4179 char *dot_name;
4180 size_t len;
4181
4182 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4183 if (h != NULL
4184 /* Don't return this sym if it is a fake function descriptor
4185 created by add_symbol_adjust. */
4186 && !(h->root.type == bfd_link_hash_undefweak
4187 && ((struct ppc_link_hash_entry *) h)->fake))
4188 return h;
4189
4190 if (name[0] == '.')
4191 return h;
4192
4193 len = strlen (name);
4194 dot_name = bfd_alloc (abfd, len + 2);
4195 if (dot_name == NULL)
4196 return (struct elf_link_hash_entry *) 0 - 1;
4197 dot_name[0] = '.';
4198 memcpy (dot_name + 1, name, len + 1);
4199 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4200 bfd_release (abfd, dot_name);
4201 return h;
4202 }
4203
4204 /* This function satisfies all old ABI object references to ".bar" if a
4205 new ABI object defines "bar". Well, at least, undefined dot symbols
4206 are made weak. This stops later archive searches from including an
4207 object if we already have a function descriptor definition. It also
4208 prevents the linker complaining about undefined symbols.
4209 We also check and correct mismatched symbol visibility here. The
4210 most restrictive visibility of the function descriptor and the
4211 function entry symbol is used. */
4212
4213 static bfd_boolean
4214 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4215 {
4216 struct ppc_link_hash_table *htab;
4217 struct ppc_link_hash_entry *fdh;
4218
4219 if (eh->elf.root.type == bfd_link_hash_indirect)
4220 return TRUE;
4221
4222 if (eh->elf.root.type == bfd_link_hash_warning)
4223 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4224
4225 if (eh->elf.root.root.string[0] != '.')
4226 abort ();
4227
4228 htab = ppc_hash_table (info);
4229 fdh = get_fdh (eh, htab);
4230 if (fdh == NULL
4231 && !info->relocatable
4232 && (eh->elf.root.type == bfd_link_hash_undefined
4233 || eh->elf.root.type == bfd_link_hash_undefweak)
4234 && eh->elf.ref_regular)
4235 {
4236 /* Make an undefweak function descriptor sym, which is enough to
4237 pull in an --as-needed shared lib, but won't cause link
4238 errors. Archives are handled elsewhere. */
4239 fdh = make_fdh (info, eh);
4240 if (fdh == NULL)
4241 return FALSE;
4242 else
4243 fdh->elf.ref_regular = 1;
4244 }
4245 else if (fdh != NULL)
4246 {
4247 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4248 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4249 if (entry_vis < descr_vis)
4250 fdh->elf.other += entry_vis - descr_vis;
4251 else if (entry_vis > descr_vis)
4252 eh->elf.other += descr_vis - entry_vis;
4253
4254 if ((fdh->elf.root.type == bfd_link_hash_defined
4255 || fdh->elf.root.type == bfd_link_hash_defweak)
4256 && eh->elf.root.type == bfd_link_hash_undefined)
4257 {
4258 eh->elf.root.type = bfd_link_hash_undefweak;
4259 eh->was_undefined = 1;
4260 htab->twiddled_syms = 1;
4261 }
4262 }
4263
4264 return TRUE;
4265 }
4266
4267 /* Process list of dot-symbols we made in link_hash_newfunc. */
4268
4269 static bfd_boolean
4270 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4271 {
4272 struct ppc_link_hash_table *htab;
4273 struct ppc_link_hash_entry **p, *eh;
4274
4275 htab = ppc_hash_table (info);
4276 if (!is_ppc64_elf_target (htab->elf.root.creator))
4277 return TRUE;
4278
4279 if (is_ppc64_elf_target (ibfd->xvec))
4280 {
4281 p = &htab->dot_syms;
4282 while ((eh = *p) != NULL)
4283 {
4284 *p = NULL;
4285 if (!add_symbol_adjust (eh, info))
4286 return FALSE;
4287 p = &eh->u.next_dot_sym;
4288 }
4289 }
4290
4291 /* Clear the list for non-ppc64 input files. */
4292 p = &htab->dot_syms;
4293 while ((eh = *p) != NULL)
4294 {
4295 *p = NULL;
4296 p = &eh->u.next_dot_sym;
4297 }
4298
4299 /* We need to fix the undefs list for any syms we have twiddled to
4300 undef_weak. */
4301 if (htab->twiddled_syms)
4302 {
4303 bfd_link_repair_undef_list (&htab->elf.root);
4304 htab->twiddled_syms = 0;
4305 }
4306 return TRUE;
4307 }
4308
4309 /* Undo hash table changes when an --as-needed input file is determined
4310 not to be needed. */
4311
4312 static bfd_boolean
4313 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4314 struct bfd_link_info *info)
4315 {
4316 ppc_hash_table (info)->dot_syms = NULL;
4317 return TRUE;
4318 }
4319
4320 static bfd_boolean
4321 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4322 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4323 {
4324 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4325 char *local_got_tls_masks;
4326
4327 if (local_got_ents == NULL)
4328 {
4329 bfd_size_type size = symtab_hdr->sh_info;
4330
4331 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4332 local_got_ents = bfd_zalloc (abfd, size);
4333 if (local_got_ents == NULL)
4334 return FALSE;
4335 elf_local_got_ents (abfd) = local_got_ents;
4336 }
4337
4338 if ((tls_type & TLS_EXPLICIT) == 0)
4339 {
4340 struct got_entry *ent;
4341
4342 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4343 if (ent->addend == r_addend
4344 && ent->owner == abfd
4345 && ent->tls_type == tls_type)
4346 break;
4347 if (ent == NULL)
4348 {
4349 bfd_size_type amt = sizeof (*ent);
4350 ent = bfd_alloc (abfd, amt);
4351 if (ent == NULL)
4352 return FALSE;
4353 ent->next = local_got_ents[r_symndx];
4354 ent->addend = r_addend;
4355 ent->owner = abfd;
4356 ent->tls_type = tls_type;
4357 ent->got.refcount = 0;
4358 local_got_ents[r_symndx] = ent;
4359 }
4360 ent->got.refcount += 1;
4361 }
4362
4363 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4364 local_got_tls_masks[r_symndx] |= tls_type;
4365 return TRUE;
4366 }
4367
4368 static bfd_boolean
4369 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4370 {
4371 struct plt_entry *ent;
4372
4373 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4374 if (ent->addend == addend)
4375 break;
4376 if (ent == NULL)
4377 {
4378 bfd_size_type amt = sizeof (*ent);
4379 ent = bfd_alloc (abfd, amt);
4380 if (ent == NULL)
4381 return FALSE;
4382 ent->next = eh->elf.plt.plist;
4383 ent->addend = addend;
4384 ent->plt.refcount = 0;
4385 eh->elf.plt.plist = ent;
4386 }
4387 ent->plt.refcount += 1;
4388 eh->elf.needs_plt = 1;
4389 if (eh->elf.root.root.string[0] == '.'
4390 && eh->elf.root.root.string[1] != '\0')
4391 eh->is_func = 1;
4392 return TRUE;
4393 }
4394
4395 /* Look through the relocs for a section during the first phase, and
4396 calculate needed space in the global offset table, procedure
4397 linkage table, and dynamic reloc sections. */
4398
4399 static bfd_boolean
4400 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4401 asection *sec, const Elf_Internal_Rela *relocs)
4402 {
4403 struct ppc_link_hash_table *htab;
4404 Elf_Internal_Shdr *symtab_hdr;
4405 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4406 const Elf_Internal_Rela *rel;
4407 const Elf_Internal_Rela *rel_end;
4408 asection *sreloc;
4409 asection **opd_sym_map;
4410
4411 if (info->relocatable)
4412 return TRUE;
4413
4414 /* Don't do anything special with non-loaded, non-alloced sections.
4415 In particular, any relocs in such sections should not affect GOT
4416 and PLT reference counting (ie. we don't allow them to create GOT
4417 or PLT entries), there's no possibility or desire to optimize TLS
4418 relocs, and there's not much point in propagating relocs to shared
4419 libs that the dynamic linker won't relocate. */
4420 if ((sec->flags & SEC_ALLOC) == 0)
4421 return TRUE;
4422
4423 htab = ppc_hash_table (info);
4424 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4425
4426 sym_hashes = elf_sym_hashes (abfd);
4427 sym_hashes_end = (sym_hashes
4428 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4429 - symtab_hdr->sh_info);
4430
4431 sreloc = NULL;
4432 opd_sym_map = NULL;
4433 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4434 {
4435 /* Garbage collection needs some extra help with .opd sections.
4436 We don't want to necessarily keep everything referenced by
4437 relocs in .opd, as that would keep all functions. Instead,
4438 if we reference an .opd symbol (a function descriptor), we
4439 want to keep the function code symbol's section. This is
4440 easy for global symbols, but for local syms we need to keep
4441 information about the associated function section. Later, if
4442 edit_opd deletes entries, we'll use this array to adjust
4443 local syms in .opd. */
4444 union opd_info {
4445 asection *func_section;
4446 long entry_adjust;
4447 };
4448 bfd_size_type amt;
4449
4450 amt = sec->size * sizeof (union opd_info) / 8;
4451 opd_sym_map = bfd_zalloc (abfd, amt);
4452 if (opd_sym_map == NULL)
4453 return FALSE;
4454 ppc64_elf_section_data (sec)->u.opd_func_sec = opd_sym_map;
4455 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4456 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4457 }
4458
4459 if (htab->sfpr == NULL
4460 && !create_linkage_sections (htab->elf.dynobj, info))
4461 return FALSE;
4462
4463 rel_end = relocs + sec->reloc_count;
4464 for (rel = relocs; rel < rel_end; rel++)
4465 {
4466 unsigned long r_symndx;
4467 struct elf_link_hash_entry *h;
4468 enum elf_ppc64_reloc_type r_type;
4469 int tls_type = 0;
4470 struct _ppc64_elf_section_data *ppc64_sec;
4471
4472 r_symndx = ELF64_R_SYM (rel->r_info);
4473 if (r_symndx < symtab_hdr->sh_info)
4474 h = NULL;
4475 else
4476 {
4477 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4478 while (h->root.type == bfd_link_hash_indirect
4479 || h->root.type == bfd_link_hash_warning)
4480 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4481 }
4482
4483 r_type = ELF64_R_TYPE (rel->r_info);
4484 switch (r_type)
4485 {
4486 case R_PPC64_GOT_TLSLD16:
4487 case R_PPC64_GOT_TLSLD16_LO:
4488 case R_PPC64_GOT_TLSLD16_HI:
4489 case R_PPC64_GOT_TLSLD16_HA:
4490 tls_type = TLS_TLS | TLS_LD;
4491 goto dogottls;
4492
4493 case R_PPC64_GOT_TLSGD16:
4494 case R_PPC64_GOT_TLSGD16_LO:
4495 case R_PPC64_GOT_TLSGD16_HI:
4496 case R_PPC64_GOT_TLSGD16_HA:
4497 tls_type = TLS_TLS | TLS_GD;
4498 goto dogottls;
4499
4500 case R_PPC64_GOT_TPREL16_DS:
4501 case R_PPC64_GOT_TPREL16_LO_DS:
4502 case R_PPC64_GOT_TPREL16_HI:
4503 case R_PPC64_GOT_TPREL16_HA:
4504 if (info->shared)
4505 info->flags |= DF_STATIC_TLS;
4506 tls_type = TLS_TLS | TLS_TPREL;
4507 goto dogottls;
4508
4509 case R_PPC64_GOT_DTPREL16_DS:
4510 case R_PPC64_GOT_DTPREL16_LO_DS:
4511 case R_PPC64_GOT_DTPREL16_HI:
4512 case R_PPC64_GOT_DTPREL16_HA:
4513 tls_type = TLS_TLS | TLS_DTPREL;
4514 dogottls:
4515 sec->has_tls_reloc = 1;
4516 /* Fall thru */
4517
4518 case R_PPC64_GOT16:
4519 case R_PPC64_GOT16_DS:
4520 case R_PPC64_GOT16_HA:
4521 case R_PPC64_GOT16_HI:
4522 case R_PPC64_GOT16_LO:
4523 case R_PPC64_GOT16_LO_DS:
4524 /* This symbol requires a global offset table entry. */
4525 sec->has_toc_reloc = 1;
4526 if (ppc64_elf_tdata (abfd)->got == NULL
4527 && !create_got_section (abfd, info))
4528 return FALSE;
4529
4530 if (h != NULL)
4531 {
4532 struct ppc_link_hash_entry *eh;
4533 struct got_entry *ent;
4534
4535 eh = (struct ppc_link_hash_entry *) h;
4536 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4537 if (ent->addend == rel->r_addend
4538 && ent->owner == abfd
4539 && ent->tls_type == tls_type)
4540 break;
4541 if (ent == NULL)
4542 {
4543 bfd_size_type amt = sizeof (*ent);
4544 ent = bfd_alloc (abfd, amt);
4545 if (ent == NULL)
4546 return FALSE;
4547 ent->next = eh->elf.got.glist;
4548 ent->addend = rel->r_addend;
4549 ent->owner = abfd;
4550 ent->tls_type = tls_type;
4551 ent->got.refcount = 0;
4552 eh->elf.got.glist = ent;
4553 }
4554 ent->got.refcount += 1;
4555 eh->tls_mask |= tls_type;
4556 }
4557 else
4558 /* This is a global offset table entry for a local symbol. */
4559 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4560 rel->r_addend, tls_type))
4561 return FALSE;
4562 break;
4563
4564 case R_PPC64_PLT16_HA:
4565 case R_PPC64_PLT16_HI:
4566 case R_PPC64_PLT16_LO:
4567 case R_PPC64_PLT32:
4568 case R_PPC64_PLT64:
4569 /* This symbol requires a procedure linkage table entry. We
4570 actually build the entry in adjust_dynamic_symbol,
4571 because this might be a case of linking PIC code without
4572 linking in any dynamic objects, in which case we don't
4573 need to generate a procedure linkage table after all. */
4574 if (h == NULL)
4575 {
4576 /* It does not make sense to have a procedure linkage
4577 table entry for a local symbol. */
4578 bfd_set_error (bfd_error_bad_value);
4579 return FALSE;
4580 }
4581 else
4582 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4583 rel->r_addend))
4584 return FALSE;
4585 break;
4586
4587 /* The following relocations don't need to propagate the
4588 relocation if linking a shared object since they are
4589 section relative. */
4590 case R_PPC64_SECTOFF:
4591 case R_PPC64_SECTOFF_LO:
4592 case R_PPC64_SECTOFF_HI:
4593 case R_PPC64_SECTOFF_HA:
4594 case R_PPC64_SECTOFF_DS:
4595 case R_PPC64_SECTOFF_LO_DS:
4596 case R_PPC64_DTPREL16:
4597 case R_PPC64_DTPREL16_LO:
4598 case R_PPC64_DTPREL16_HI:
4599 case R_PPC64_DTPREL16_HA:
4600 case R_PPC64_DTPREL16_DS:
4601 case R_PPC64_DTPREL16_LO_DS:
4602 case R_PPC64_DTPREL16_HIGHER:
4603 case R_PPC64_DTPREL16_HIGHERA:
4604 case R_PPC64_DTPREL16_HIGHEST:
4605 case R_PPC64_DTPREL16_HIGHESTA:
4606 break;
4607
4608 /* Nor do these. */
4609 case R_PPC64_TOC16:
4610 case R_PPC64_TOC16_LO:
4611 case R_PPC64_TOC16_HI:
4612 case R_PPC64_TOC16_HA:
4613 case R_PPC64_TOC16_DS:
4614 case R_PPC64_TOC16_LO_DS:
4615 sec->has_toc_reloc = 1;
4616 break;
4617
4618 /* This relocation describes the C++ object vtable hierarchy.
4619 Reconstruct it for later use during GC. */
4620 case R_PPC64_GNU_VTINHERIT:
4621 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4622 return FALSE;
4623 break;
4624
4625 /* This relocation describes which C++ vtable entries are actually
4626 used. Record for later use during GC. */
4627 case R_PPC64_GNU_VTENTRY:
4628 BFD_ASSERT (h != NULL);
4629 if (h != NULL
4630 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4631 return FALSE;
4632 break;
4633
4634 case R_PPC64_REL14:
4635 case R_PPC64_REL14_BRTAKEN:
4636 case R_PPC64_REL14_BRNTAKEN:
4637 {
4638 asection *dest = NULL;
4639
4640 /* Heuristic: If jumping outside our section, chances are
4641 we are going to need a stub. */
4642 if (h != NULL)
4643 {
4644 /* If the sym is weak it may be overridden later, so
4645 don't assume we know where a weak sym lives. */
4646 if (h->root.type == bfd_link_hash_defined)
4647 dest = h->root.u.def.section;
4648 }
4649 else
4650 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4651 sec, r_symndx);
4652 if (dest != sec)
4653 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4654 }
4655 /* Fall through. */
4656
4657 case R_PPC64_REL24:
4658 if (h != NULL)
4659 {
4660 /* We may need a .plt entry if the function this reloc
4661 refers to is in a shared lib. */
4662 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4663 rel->r_addend))
4664 return FALSE;
4665 if (h == &htab->tls_get_addr->elf
4666 || h == &htab->tls_get_addr_fd->elf)
4667 sec->has_tls_reloc = 1;
4668 else if (htab->tls_get_addr == NULL
4669 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4670 && (h->root.root.string[15] == 0
4671 || h->root.root.string[15] == '@'))
4672 {
4673 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4674 sec->has_tls_reloc = 1;
4675 }
4676 else if (htab->tls_get_addr_fd == NULL
4677 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4678 && (h->root.root.string[14] == 0
4679 || h->root.root.string[14] == '@'))
4680 {
4681 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4682 sec->has_tls_reloc = 1;
4683 }
4684 }
4685 break;
4686
4687 case R_PPC64_TPREL64:
4688 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4689 if (info->shared)
4690 info->flags |= DF_STATIC_TLS;
4691 goto dotlstoc;
4692
4693 case R_PPC64_DTPMOD64:
4694 if (rel + 1 < rel_end
4695 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4696 && rel[1].r_offset == rel->r_offset + 8)
4697 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4698 else
4699 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4700 goto dotlstoc;
4701
4702 case R_PPC64_DTPREL64:
4703 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4704 if (rel != relocs
4705 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4706 && rel[-1].r_offset == rel->r_offset - 8)
4707 /* This is the second reloc of a dtpmod, dtprel pair.
4708 Don't mark with TLS_DTPREL. */
4709 goto dodyn;
4710
4711 dotlstoc:
4712 sec->has_tls_reloc = 1;
4713 if (h != NULL)
4714 {
4715 struct ppc_link_hash_entry *eh;
4716 eh = (struct ppc_link_hash_entry *) h;
4717 eh->tls_mask |= tls_type;
4718 }
4719 else
4720 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4721 rel->r_addend, tls_type))
4722 return FALSE;
4723
4724 ppc64_sec = ppc64_elf_section_data (sec);
4725 if (ppc64_sec->sec_type != sec_toc)
4726 {
4727 /* One extra to simplify get_tls_mask. */
4728 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4729 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4730 if (ppc64_sec->u.t_symndx == NULL)
4731 return FALSE;
4732 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4733 ppc64_sec->sec_type = sec_toc;
4734 }
4735 BFD_ASSERT (rel->r_offset % 8 == 0);
4736 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4737
4738 /* Mark the second slot of a GD or LD entry.
4739 -1 to indicate GD and -2 to indicate LD. */
4740 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4741 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4742 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4743 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4744 goto dodyn;
4745
4746 case R_PPC64_TPREL16:
4747 case R_PPC64_TPREL16_LO:
4748 case R_PPC64_TPREL16_HI:
4749 case R_PPC64_TPREL16_HA:
4750 case R_PPC64_TPREL16_DS:
4751 case R_PPC64_TPREL16_LO_DS:
4752 case R_PPC64_TPREL16_HIGHER:
4753 case R_PPC64_TPREL16_HIGHERA:
4754 case R_PPC64_TPREL16_HIGHEST:
4755 case R_PPC64_TPREL16_HIGHESTA:
4756 if (info->shared)
4757 {
4758 info->flags |= DF_STATIC_TLS;
4759 goto dodyn;
4760 }
4761 break;
4762
4763 case R_PPC64_ADDR64:
4764 if (opd_sym_map != NULL
4765 && rel + 1 < rel_end
4766 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4767 {
4768 if (h != NULL)
4769 {
4770 if (h->root.root.string[0] == '.'
4771 && h->root.root.string[1] != 0
4772 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4773 ;
4774 else
4775 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4776 }
4777 else
4778 {
4779 asection *s;
4780
4781 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4782 r_symndx);
4783 if (s == NULL)
4784 return FALSE;
4785 else if (s != sec)
4786 opd_sym_map[rel->r_offset / 8] = s;
4787 }
4788 }
4789 /* Fall through. */
4790
4791 case R_PPC64_REL30:
4792 case R_PPC64_REL32:
4793 case R_PPC64_REL64:
4794 case R_PPC64_ADDR14:
4795 case R_PPC64_ADDR14_BRNTAKEN:
4796 case R_PPC64_ADDR14_BRTAKEN:
4797 case R_PPC64_ADDR16:
4798 case R_PPC64_ADDR16_DS:
4799 case R_PPC64_ADDR16_HA:
4800 case R_PPC64_ADDR16_HI:
4801 case R_PPC64_ADDR16_HIGHER:
4802 case R_PPC64_ADDR16_HIGHERA:
4803 case R_PPC64_ADDR16_HIGHEST:
4804 case R_PPC64_ADDR16_HIGHESTA:
4805 case R_PPC64_ADDR16_LO:
4806 case R_PPC64_ADDR16_LO_DS:
4807 case R_PPC64_ADDR24:
4808 case R_PPC64_ADDR32:
4809 case R_PPC64_UADDR16:
4810 case R_PPC64_UADDR32:
4811 case R_PPC64_UADDR64:
4812 case R_PPC64_TOC:
4813 if (h != NULL && !info->shared)
4814 /* We may need a copy reloc. */
4815 h->non_got_ref = 1;
4816
4817 /* Don't propagate .opd relocs. */
4818 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4819 break;
4820
4821 /* If we are creating a shared library, and this is a reloc
4822 against a global symbol, or a non PC relative reloc
4823 against a local symbol, then we need to copy the reloc
4824 into the shared library. However, if we are linking with
4825 -Bsymbolic, we do not need to copy a reloc against a
4826 global symbol which is defined in an object we are
4827 including in the link (i.e., DEF_REGULAR is set). At
4828 this point we have not seen all the input files, so it is
4829 possible that DEF_REGULAR is not set now but will be set
4830 later (it is never cleared). In case of a weak definition,
4831 DEF_REGULAR may be cleared later by a strong definition in
4832 a shared library. We account for that possibility below by
4833 storing information in the dyn_relocs field of the hash
4834 table entry. A similar situation occurs when creating
4835 shared libraries and symbol visibility changes render the
4836 symbol local.
4837
4838 If on the other hand, we are creating an executable, we
4839 may need to keep relocations for symbols satisfied by a
4840 dynamic library if we manage to avoid copy relocs for the
4841 symbol. */
4842 dodyn:
4843 if ((info->shared
4844 && (MUST_BE_DYN_RELOC (r_type)
4845 || (h != NULL
4846 && (! info->symbolic
4847 || h->root.type == bfd_link_hash_defweak
4848 || !h->def_regular))))
4849 || (ELIMINATE_COPY_RELOCS
4850 && !info->shared
4851 && h != NULL
4852 && (h->root.type == bfd_link_hash_defweak
4853 || !h->def_regular)))
4854 {
4855 struct ppc_dyn_relocs *p;
4856 struct ppc_dyn_relocs **head;
4857
4858 /* We must copy these reloc types into the output file.
4859 Create a reloc section in dynobj and make room for
4860 this reloc. */
4861 if (sreloc == NULL)
4862 {
4863 const char *name;
4864 bfd *dynobj;
4865
4866 name = (bfd_elf_string_from_elf_section
4867 (abfd,
4868 elf_elfheader (abfd)->e_shstrndx,
4869 elf_section_data (sec)->rel_hdr.sh_name));
4870 if (name == NULL)
4871 return FALSE;
4872
4873 if (! CONST_STRNEQ (name, ".rela")
4874 || strcmp (bfd_get_section_name (abfd, sec),
4875 name + 5) != 0)
4876 {
4877 (*_bfd_error_handler)
4878 (_("%B: bad relocation section name `%s\'"),
4879 abfd, name);
4880 bfd_set_error (bfd_error_bad_value);
4881 }
4882
4883 dynobj = htab->elf.dynobj;
4884 sreloc = bfd_get_section_by_name (dynobj, name);
4885 if (sreloc == NULL)
4886 {
4887 flagword flags;
4888
4889 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4890 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4891 | SEC_ALLOC | SEC_LOAD);
4892 sreloc = bfd_make_section_with_flags (dynobj,
4893 name,
4894 flags);
4895 if (sreloc == NULL
4896 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4897 return FALSE;
4898 }
4899 elf_section_data (sec)->sreloc = sreloc;
4900 }
4901
4902 /* If this is a global symbol, we count the number of
4903 relocations we need for this symbol. */
4904 if (h != NULL)
4905 {
4906 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4907 }
4908 else
4909 {
4910 /* Track dynamic relocs needed for local syms too.
4911 We really need local syms available to do this
4912 easily. Oh well. */
4913
4914 asection *s;
4915 void *vpp;
4916
4917 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4918 sec, r_symndx);
4919 if (s == NULL)
4920 return FALSE;
4921
4922 vpp = &elf_section_data (s)->local_dynrel;
4923 head = (struct ppc_dyn_relocs **) vpp;
4924 }
4925
4926 p = *head;
4927 if (p == NULL || p->sec != sec)
4928 {
4929 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4930 if (p == NULL)
4931 return FALSE;
4932 p->next = *head;
4933 *head = p;
4934 p->sec = sec;
4935 p->count = 0;
4936 p->pc_count = 0;
4937 }
4938
4939 p->count += 1;
4940 if (!MUST_BE_DYN_RELOC (r_type))
4941 p->pc_count += 1;
4942 }
4943 break;
4944
4945 default:
4946 break;
4947 }
4948 }
4949
4950 return TRUE;
4951 }
4952
4953 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4954 of the code entry point, and its section. */
4955
4956 static bfd_vma
4957 opd_entry_value (asection *opd_sec,
4958 bfd_vma offset,
4959 asection **code_sec,
4960 bfd_vma *code_off)
4961 {
4962 bfd *opd_bfd = opd_sec->owner;
4963 Elf_Internal_Rela *relocs;
4964 Elf_Internal_Rela *lo, *hi, *look;
4965 bfd_vma val;
4966
4967 /* No relocs implies we are linking a --just-symbols object. */
4968 if (opd_sec->reloc_count == 0)
4969 {
4970 bfd_vma val;
4971
4972 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4973 return (bfd_vma) -1;
4974
4975 if (code_sec != NULL)
4976 {
4977 asection *sec, *likely = NULL;
4978 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4979 if (sec->vma <= val
4980 && (sec->flags & SEC_LOAD) != 0
4981 && (sec->flags & SEC_ALLOC) != 0)
4982 likely = sec;
4983 if (likely != NULL)
4984 {
4985 *code_sec = likely;
4986 if (code_off != NULL)
4987 *code_off = val - likely->vma;
4988 }
4989 }
4990 return val;
4991 }
4992
4993 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4994 if (relocs == NULL)
4995 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4996
4997 /* Go find the opd reloc at the sym address. */
4998 lo = relocs;
4999 BFD_ASSERT (lo != NULL);
5000 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5001 val = (bfd_vma) -1;
5002 while (lo < hi)
5003 {
5004 look = lo + (hi - lo) / 2;
5005 if (look->r_offset < offset)
5006 lo = look + 1;
5007 else if (look->r_offset > offset)
5008 hi = look;
5009 else
5010 {
5011 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
5012 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5013 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5014 {
5015 unsigned long symndx = ELF64_R_SYM (look->r_info);
5016 asection *sec;
5017
5018 if (symndx < symtab_hdr->sh_info)
5019 {
5020 Elf_Internal_Sym *sym;
5021
5022 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5023 if (sym == NULL)
5024 {
5025 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5026 symtab_hdr->sh_info,
5027 0, NULL, NULL, NULL);
5028 if (sym == NULL)
5029 break;
5030 symtab_hdr->contents = (bfd_byte *) sym;
5031 }
5032
5033 sym += symndx;
5034 val = sym->st_value;
5035 sec = NULL;
5036 if ((sym->st_shndx != SHN_UNDEF
5037 && sym->st_shndx < SHN_LORESERVE)
5038 || sym->st_shndx > SHN_HIRESERVE)
5039 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5040 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5041 }
5042 else
5043 {
5044 struct elf_link_hash_entry **sym_hashes;
5045 struct elf_link_hash_entry *rh;
5046
5047 sym_hashes = elf_sym_hashes (opd_bfd);
5048 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5049 while (rh->root.type == bfd_link_hash_indirect
5050 || rh->root.type == bfd_link_hash_warning)
5051 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5052 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5053 || rh->root.type == bfd_link_hash_defweak);
5054 val = rh->root.u.def.value;
5055 sec = rh->root.u.def.section;
5056 }
5057 val += look->r_addend;
5058 if (code_off != NULL)
5059 *code_off = val;
5060 if (code_sec != NULL)
5061 *code_sec = sec;
5062 if (sec != NULL && sec->output_section != NULL)
5063 val += sec->output_section->vma + sec->output_offset;
5064 }
5065 break;
5066 }
5067 }
5068
5069 return val;
5070 }
5071
5072 /* Mark sections containing dynamically referenced symbols. When
5073 building shared libraries, we must assume that any visible symbol is
5074 referenced. */
5075
5076 static bfd_boolean
5077 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5078 {
5079 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5080 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5081
5082 if (eh->elf.root.type == bfd_link_hash_warning)
5083 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5084
5085 /* Dynamic linking info is on the func descriptor sym. */
5086 if (eh->oh != NULL
5087 && eh->oh->is_func_descriptor
5088 && (eh->oh->elf.root.type == bfd_link_hash_defined
5089 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5090 eh = eh->oh;
5091
5092 if ((eh->elf.root.type == bfd_link_hash_defined
5093 || eh->elf.root.type == bfd_link_hash_defweak)
5094 && (eh->elf.ref_dynamic
5095 || (!info->executable
5096 && eh->elf.def_regular
5097 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5098 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5099 {
5100 asection *code_sec;
5101
5102 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5103
5104 /* Function descriptor syms cause the associated
5105 function code sym section to be marked. */
5106 if (eh->is_func_descriptor
5107 && (eh->oh->elf.root.type == bfd_link_hash_defined
5108 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5109 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5110 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5111 && opd_entry_value (eh->elf.root.u.def.section,
5112 eh->elf.root.u.def.value,
5113 &code_sec, NULL) != (bfd_vma) -1)
5114 code_sec->flags |= SEC_KEEP;
5115 }
5116
5117 return TRUE;
5118 }
5119
5120 /* Return the section that should be marked against GC for a given
5121 relocation. */
5122
5123 static asection *
5124 ppc64_elf_gc_mark_hook (asection *sec,
5125 struct bfd_link_info *info,
5126 Elf_Internal_Rela *rel,
5127 struct elf_link_hash_entry *h,
5128 Elf_Internal_Sym *sym)
5129 {
5130 asection *rsec;
5131
5132 /* First mark all our entry sym sections. */
5133 if (info->gc_sym_list != NULL)
5134 {
5135 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5136 struct bfd_sym_chain *sym = info->gc_sym_list;
5137
5138 info->gc_sym_list = NULL;
5139 for (; sym != NULL; sym = sym->next)
5140 {
5141 struct ppc_link_hash_entry *eh;
5142
5143 eh = (struct ppc_link_hash_entry *)
5144 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5145 if (eh == NULL)
5146 continue;
5147 if (eh->elf.root.type != bfd_link_hash_defined
5148 && eh->elf.root.type != bfd_link_hash_defweak)
5149 continue;
5150
5151 if (eh->is_func_descriptor
5152 && (eh->oh->elf.root.type == bfd_link_hash_defined
5153 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5154 rsec = eh->oh->elf.root.u.def.section;
5155 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5156 && opd_entry_value (eh->elf.root.u.def.section,
5157 eh->elf.root.u.def.value,
5158 &rsec, NULL) != (bfd_vma) -1)
5159 ;
5160 else
5161 continue;
5162
5163 if (!rsec->gc_mark)
5164 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5165
5166 rsec = eh->elf.root.u.def.section;
5167 if (!rsec->gc_mark)
5168 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5169 }
5170 }
5171
5172 /* Syms return NULL if we're marking .opd, so we avoid marking all
5173 function sections, as all functions are referenced in .opd. */
5174 rsec = NULL;
5175 if (get_opd_info (sec) != NULL)
5176 return rsec;
5177
5178 if (h != NULL)
5179 {
5180 enum elf_ppc64_reloc_type r_type;
5181 struct ppc_link_hash_entry *eh;
5182
5183 r_type = ELF64_R_TYPE (rel->r_info);
5184 switch (r_type)
5185 {
5186 case R_PPC64_GNU_VTINHERIT:
5187 case R_PPC64_GNU_VTENTRY:
5188 break;
5189
5190 default:
5191 switch (h->root.type)
5192 {
5193 case bfd_link_hash_defined:
5194 case bfd_link_hash_defweak:
5195 eh = (struct ppc_link_hash_entry *) h;
5196 if (eh->oh != NULL
5197 && eh->oh->is_func_descriptor
5198 && (eh->oh->elf.root.type == bfd_link_hash_defined
5199 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5200 eh = eh->oh;
5201
5202 /* Function descriptor syms cause the associated
5203 function code sym section to be marked. */
5204 if (eh->is_func_descriptor
5205 && (eh->oh->elf.root.type == bfd_link_hash_defined
5206 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5207 {
5208 /* They also mark their opd section. */
5209 if (!eh->elf.root.u.def.section->gc_mark)
5210 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5211 ppc64_elf_gc_mark_hook);
5212
5213 rsec = eh->oh->elf.root.u.def.section;
5214 }
5215 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5216 && opd_entry_value (eh->elf.root.u.def.section,
5217 eh->elf.root.u.def.value,
5218 &rsec, NULL) != (bfd_vma) -1)
5219 {
5220 if (!eh->elf.root.u.def.section->gc_mark)
5221 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5222 ppc64_elf_gc_mark_hook);
5223 }
5224 else
5225 rsec = h->root.u.def.section;
5226 break;
5227
5228 case bfd_link_hash_common:
5229 rsec = h->root.u.c.p->section;
5230 break;
5231
5232 default:
5233 break;
5234 }
5235 }
5236 }
5237 else
5238 {
5239 asection **opd_sym_section;
5240
5241 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5242 opd_sym_section = get_opd_info (rsec);
5243 if (opd_sym_section != NULL)
5244 {
5245 if (!rsec->gc_mark)
5246 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5247
5248 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5249 }
5250 }
5251
5252 return rsec;
5253 }
5254
5255 /* Update the .got, .plt. and dynamic reloc reference counts for the
5256 section being removed. */
5257
5258 static bfd_boolean
5259 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5260 asection *sec, const Elf_Internal_Rela *relocs)
5261 {
5262 struct ppc_link_hash_table *htab;
5263 Elf_Internal_Shdr *symtab_hdr;
5264 struct elf_link_hash_entry **sym_hashes;
5265 struct got_entry **local_got_ents;
5266 const Elf_Internal_Rela *rel, *relend;
5267
5268 if ((sec->flags & SEC_ALLOC) == 0)
5269 return TRUE;
5270
5271 elf_section_data (sec)->local_dynrel = NULL;
5272
5273 htab = ppc_hash_table (info);
5274 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5275 sym_hashes = elf_sym_hashes (abfd);
5276 local_got_ents = elf_local_got_ents (abfd);
5277
5278 relend = relocs + sec->reloc_count;
5279 for (rel = relocs; rel < relend; rel++)
5280 {
5281 unsigned long r_symndx;
5282 enum elf_ppc64_reloc_type r_type;
5283 struct elf_link_hash_entry *h = NULL;
5284 char tls_type = 0;
5285
5286 r_symndx = ELF64_R_SYM (rel->r_info);
5287 r_type = ELF64_R_TYPE (rel->r_info);
5288 if (r_symndx >= symtab_hdr->sh_info)
5289 {
5290 struct ppc_link_hash_entry *eh;
5291 struct ppc_dyn_relocs **pp;
5292 struct ppc_dyn_relocs *p;
5293
5294 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5295 while (h->root.type == bfd_link_hash_indirect
5296 || h->root.type == bfd_link_hash_warning)
5297 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5298 eh = (struct ppc_link_hash_entry *) h;
5299
5300 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5301 if (p->sec == sec)
5302 {
5303 /* Everything must go for SEC. */
5304 *pp = p->next;
5305 break;
5306 }
5307 }
5308
5309 switch (r_type)
5310 {
5311 case R_PPC64_GOT_TLSLD16:
5312 case R_PPC64_GOT_TLSLD16_LO:
5313 case R_PPC64_GOT_TLSLD16_HI:
5314 case R_PPC64_GOT_TLSLD16_HA:
5315 tls_type = TLS_TLS | TLS_LD;
5316 goto dogot;
5317
5318 case R_PPC64_GOT_TLSGD16:
5319 case R_PPC64_GOT_TLSGD16_LO:
5320 case R_PPC64_GOT_TLSGD16_HI:
5321 case R_PPC64_GOT_TLSGD16_HA:
5322 tls_type = TLS_TLS | TLS_GD;
5323 goto dogot;
5324
5325 case R_PPC64_GOT_TPREL16_DS:
5326 case R_PPC64_GOT_TPREL16_LO_DS:
5327 case R_PPC64_GOT_TPREL16_HI:
5328 case R_PPC64_GOT_TPREL16_HA:
5329 tls_type = TLS_TLS | TLS_TPREL;
5330 goto dogot;
5331
5332 case R_PPC64_GOT_DTPREL16_DS:
5333 case R_PPC64_GOT_DTPREL16_LO_DS:
5334 case R_PPC64_GOT_DTPREL16_HI:
5335 case R_PPC64_GOT_DTPREL16_HA:
5336 tls_type = TLS_TLS | TLS_DTPREL;
5337 goto dogot;
5338
5339 case R_PPC64_GOT16:
5340 case R_PPC64_GOT16_DS:
5341 case R_PPC64_GOT16_HA:
5342 case R_PPC64_GOT16_HI:
5343 case R_PPC64_GOT16_LO:
5344 case R_PPC64_GOT16_LO_DS:
5345 dogot:
5346 {
5347 struct got_entry *ent;
5348
5349 if (h != NULL)
5350 ent = h->got.glist;
5351 else
5352 ent = local_got_ents[r_symndx];
5353
5354 for (; ent != NULL; ent = ent->next)
5355 if (ent->addend == rel->r_addend
5356 && ent->owner == abfd
5357 && ent->tls_type == tls_type)
5358 break;
5359 if (ent == NULL)
5360 abort ();
5361 if (ent->got.refcount > 0)
5362 ent->got.refcount -= 1;
5363 }
5364 break;
5365
5366 case R_PPC64_PLT16_HA:
5367 case R_PPC64_PLT16_HI:
5368 case R_PPC64_PLT16_LO:
5369 case R_PPC64_PLT32:
5370 case R_PPC64_PLT64:
5371 case R_PPC64_REL14:
5372 case R_PPC64_REL14_BRNTAKEN:
5373 case R_PPC64_REL14_BRTAKEN:
5374 case R_PPC64_REL24:
5375 if (h != NULL)
5376 {
5377 struct plt_entry *ent;
5378
5379 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5380 if (ent->addend == rel->r_addend)
5381 break;
5382 if (ent == NULL)
5383 abort ();
5384 if (ent->plt.refcount > 0)
5385 ent->plt.refcount -= 1;
5386 }
5387 break;
5388
5389 default:
5390 break;
5391 }
5392 }
5393 return TRUE;
5394 }
5395
5396 /* The maximum size of .sfpr. */
5397 #define SFPR_MAX (218*4)
5398
5399 struct sfpr_def_parms
5400 {
5401 const char name[12];
5402 unsigned char lo, hi;
5403 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5404 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5405 };
5406
5407 /* Auto-generate _save*, _rest* functions in .sfpr. */
5408
5409 static unsigned int
5410 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5411 {
5412 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5413 unsigned int i;
5414 size_t len = strlen (parm->name);
5415 bfd_boolean writing = FALSE;
5416 char sym[16];
5417
5418 memcpy (sym, parm->name, len);
5419 sym[len + 2] = 0;
5420
5421 for (i = parm->lo; i <= parm->hi; i++)
5422 {
5423 struct elf_link_hash_entry *h;
5424
5425 sym[len + 0] = i / 10 + '0';
5426 sym[len + 1] = i % 10 + '0';
5427 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5428 if (h != NULL
5429 && !h->def_regular)
5430 {
5431 h->root.type = bfd_link_hash_defined;
5432 h->root.u.def.section = htab->sfpr;
5433 h->root.u.def.value = htab->sfpr->size;
5434 h->type = STT_FUNC;
5435 h->def_regular = 1;
5436 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5437 writing = TRUE;
5438 if (htab->sfpr->contents == NULL)
5439 {
5440 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5441 if (htab->sfpr->contents == NULL)
5442 return FALSE;
5443 }
5444 }
5445 if (writing)
5446 {
5447 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5448 if (i != parm->hi)
5449 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5450 else
5451 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5452 htab->sfpr->size = p - htab->sfpr->contents;
5453 }
5454 }
5455
5456 return TRUE;
5457 }
5458
5459 static bfd_byte *
5460 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5461 {
5462 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5463 return p + 4;
5464 }
5465
5466 static bfd_byte *
5467 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5468 {
5469 p = savegpr0 (abfd, p, r);
5470 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5471 p = p + 4;
5472 bfd_put_32 (abfd, BLR, p);
5473 return p + 4;
5474 }
5475
5476 static bfd_byte *
5477 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5478 {
5479 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5480 return p + 4;
5481 }
5482
5483 static bfd_byte *
5484 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5485 {
5486 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5487 p = p + 4;
5488 p = restgpr0 (abfd, p, r);
5489 bfd_put_32 (abfd, MTLR_R0, p);
5490 p = p + 4;
5491 if (r == 29)
5492 {
5493 p = restgpr0 (abfd, p, 30);
5494 p = restgpr0 (abfd, p, 31);
5495 }
5496 bfd_put_32 (abfd, BLR, p);
5497 return p + 4;
5498 }
5499
5500 static bfd_byte *
5501 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5502 {
5503 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5504 return p + 4;
5505 }
5506
5507 static bfd_byte *
5508 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5509 {
5510 p = savegpr1 (abfd, p, r);
5511 bfd_put_32 (abfd, BLR, p);
5512 return p + 4;
5513 }
5514
5515 static bfd_byte *
5516 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5517 {
5518 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5519 return p + 4;
5520 }
5521
5522 static bfd_byte *
5523 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5524 {
5525 p = restgpr1 (abfd, p, r);
5526 bfd_put_32 (abfd, BLR, p);
5527 return p + 4;
5528 }
5529
5530 static bfd_byte *
5531 savefpr (bfd *abfd, bfd_byte *p, int r)
5532 {
5533 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5534 return p + 4;
5535 }
5536
5537 static bfd_byte *
5538 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5539 {
5540 p = savefpr (abfd, p, r);
5541 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5542 p = p + 4;
5543 bfd_put_32 (abfd, BLR, p);
5544 return p + 4;
5545 }
5546
5547 static bfd_byte *
5548 restfpr (bfd *abfd, bfd_byte *p, int r)
5549 {
5550 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5551 return p + 4;
5552 }
5553
5554 static bfd_byte *
5555 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5556 {
5557 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5558 p = p + 4;
5559 p = restfpr (abfd, p, r);
5560 bfd_put_32 (abfd, MTLR_R0, p);
5561 p = p + 4;
5562 if (r == 29)
5563 {
5564 p = restfpr (abfd, p, 30);
5565 p = restfpr (abfd, p, 31);
5566 }
5567 bfd_put_32 (abfd, BLR, p);
5568 return p + 4;
5569 }
5570
5571 static bfd_byte *
5572 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5573 {
5574 p = savefpr (abfd, p, r);
5575 bfd_put_32 (abfd, BLR, p);
5576 return p + 4;
5577 }
5578
5579 static bfd_byte *
5580 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5581 {
5582 p = restfpr (abfd, p, r);
5583 bfd_put_32 (abfd, BLR, p);
5584 return p + 4;
5585 }
5586
5587 static bfd_byte *
5588 savevr (bfd *abfd, bfd_byte *p, int r)
5589 {
5590 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5591 p = p + 4;
5592 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5593 return p + 4;
5594 }
5595
5596 static bfd_byte *
5597 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5598 {
5599 p = savevr (abfd, p, r);
5600 bfd_put_32 (abfd, BLR, p);
5601 return p + 4;
5602 }
5603
5604 static bfd_byte *
5605 restvr (bfd *abfd, bfd_byte *p, int r)
5606 {
5607 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5608 p = p + 4;
5609 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5610 return p + 4;
5611 }
5612
5613 static bfd_byte *
5614 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5615 {
5616 p = restvr (abfd, p, r);
5617 bfd_put_32 (abfd, BLR, p);
5618 return p + 4;
5619 }
5620
5621 /* Called via elf_link_hash_traverse to transfer dynamic linking
5622 information on function code symbol entries to their corresponding
5623 function descriptor symbol entries. */
5624
5625 static bfd_boolean
5626 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5627 {
5628 struct bfd_link_info *info;
5629 struct ppc_link_hash_table *htab;
5630 struct plt_entry *ent;
5631 struct ppc_link_hash_entry *fh;
5632 struct ppc_link_hash_entry *fdh;
5633 bfd_boolean force_local;
5634
5635 fh = (struct ppc_link_hash_entry *) h;
5636 if (fh->elf.root.type == bfd_link_hash_indirect)
5637 return TRUE;
5638
5639 if (fh->elf.root.type == bfd_link_hash_warning)
5640 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5641
5642 info = inf;
5643 htab = ppc_hash_table (info);
5644
5645 /* Resolve undefined references to dot-symbols as the value
5646 in the function descriptor, if we have one in a regular object.
5647 This is to satisfy cases like ".quad .foo". Calls to functions
5648 in dynamic objects are handled elsewhere. */
5649 if (fh->elf.root.type == bfd_link_hash_undefweak
5650 && fh->was_undefined
5651 && (fh->oh->elf.root.type == bfd_link_hash_defined
5652 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5653 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5654 && opd_entry_value (fh->oh->elf.root.u.def.section,
5655 fh->oh->elf.root.u.def.value,
5656 &fh->elf.root.u.def.section,
5657 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5658 {
5659 fh->elf.root.type = fh->oh->elf.root.type;
5660 fh->elf.forced_local = 1;
5661 fh->elf.def_regular = fh->oh->elf.def_regular;
5662 fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
5663 }
5664
5665 /* If this is a function code symbol, transfer dynamic linking
5666 information to the function descriptor symbol. */
5667 if (!fh->is_func)
5668 return TRUE;
5669
5670 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5671 if (ent->plt.refcount > 0)
5672 break;
5673 if (ent == NULL
5674 || fh->elf.root.root.string[0] != '.'
5675 || fh->elf.root.root.string[1] == '\0')
5676 return TRUE;
5677
5678 /* Find the corresponding function descriptor symbol. Create it
5679 as undefined if necessary. */
5680
5681 fdh = get_fdh (fh, htab);
5682 if (fdh != NULL)
5683 while (fdh->elf.root.type == bfd_link_hash_indirect
5684 || fdh->elf.root.type == bfd_link_hash_warning)
5685 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5686
5687 if (fdh == NULL
5688 && info->shared
5689 && (fh->elf.root.type == bfd_link_hash_undefined
5690 || fh->elf.root.type == bfd_link_hash_undefweak))
5691 {
5692 fdh = make_fdh (info, fh);
5693 if (fdh == NULL)
5694 return FALSE;
5695 }
5696
5697 /* Fake function descriptors are made undefweak. If the function
5698 code symbol is strong undefined, make the fake sym the same.
5699 If the function code symbol is defined, then force the fake
5700 descriptor local; We can't support overriding of symbols in a
5701 shared library on a fake descriptor. */
5702
5703 if (fdh != NULL
5704 && fdh->fake
5705 && fdh->elf.root.type == bfd_link_hash_undefweak)
5706 {
5707 if (fh->elf.root.type == bfd_link_hash_undefined)
5708 {
5709 fdh->elf.root.type = bfd_link_hash_undefined;
5710 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5711 }
5712 else if (fh->elf.root.type == bfd_link_hash_defined
5713 || fh->elf.root.type == bfd_link_hash_defweak)
5714 {
5715 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5716 }
5717 }
5718
5719 if (fdh != NULL
5720 && !fdh->elf.forced_local
5721 && (info->shared
5722 || fdh->elf.def_dynamic
5723 || fdh->elf.ref_dynamic
5724 || (fdh->elf.root.type == bfd_link_hash_undefweak
5725 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5726 {
5727 if (fdh->elf.dynindx == -1)
5728 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5729 return FALSE;
5730 fdh->elf.ref_regular |= fh->elf.ref_regular;
5731 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5732 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5733 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5734 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5735 {
5736 move_plt_plist (fh, fdh);
5737 fdh->elf.needs_plt = 1;
5738 }
5739 fdh->is_func_descriptor = 1;
5740 fdh->oh = fh;
5741 fh->oh = fdh;
5742 }
5743
5744 /* Now that the info is on the function descriptor, clear the
5745 function code sym info. Any function code syms for which we
5746 don't have a definition in a regular file, we force local.
5747 This prevents a shared library from exporting syms that have
5748 been imported from another library. Function code syms that
5749 are really in the library we must leave global to prevent the
5750 linker dragging in a definition from a static library. */
5751 force_local = (!fh->elf.def_regular
5752 || fdh == NULL
5753 || !fdh->elf.def_regular
5754 || fdh->elf.forced_local);
5755 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5756
5757 return TRUE;
5758 }
5759
5760 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5761 this hook to a) provide some gcc support functions, and b) transfer
5762 dynamic linking information gathered so far on function code symbol
5763 entries, to their corresponding function descriptor symbol entries. */
5764
5765 static bfd_boolean
5766 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5767 struct bfd_link_info *info)
5768 {
5769 struct ppc_link_hash_table *htab;
5770 unsigned int i;
5771 const struct sfpr_def_parms funcs[] =
5772 {
5773 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5774 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5775 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5776 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5777 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5778 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5779 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5780 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5781 { "._savef", 14, 31, savefpr, savefpr1_tail },
5782 { "._restf", 14, 31, restfpr, restfpr1_tail },
5783 { "_savevr_", 20, 31, savevr, savevr_tail },
5784 { "_restvr_", 20, 31, restvr, restvr_tail }
5785 };
5786
5787 htab = ppc_hash_table (info);
5788 if (htab->sfpr == NULL)
5789 /* We don't have any relocs. */
5790 return TRUE;
5791
5792 /* Provide any missing _save* and _rest* functions. */
5793 htab->sfpr->size = 0;
5794 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5795 if (!sfpr_define (info, &funcs[i]))
5796 return FALSE;
5797
5798 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5799
5800 if (htab->sfpr->size == 0)
5801 htab->sfpr->flags |= SEC_EXCLUDE;
5802
5803 return TRUE;
5804 }
5805
5806 /* Adjust a symbol defined by a dynamic object and referenced by a
5807 regular object. The current definition is in some section of the
5808 dynamic object, but we're not including those sections. We have to
5809 change the definition to something the rest of the link can
5810 understand. */
5811
5812 static bfd_boolean
5813 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5814 struct elf_link_hash_entry *h)
5815 {
5816 struct ppc_link_hash_table *htab;
5817 asection *s;
5818
5819 htab = ppc_hash_table (info);
5820
5821 /* Deal with function syms. */
5822 if (h->type == STT_FUNC
5823 || h->needs_plt)
5824 {
5825 /* Clear procedure linkage table information for any symbol that
5826 won't need a .plt entry. */
5827 struct plt_entry *ent;
5828 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5829 if (ent->plt.refcount > 0)
5830 break;
5831 if (ent == NULL
5832 || SYMBOL_CALLS_LOCAL (info, h)
5833 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5834 && h->root.type == bfd_link_hash_undefweak))
5835 {
5836 h->plt.plist = NULL;
5837 h->needs_plt = 0;
5838 }
5839 }
5840 else
5841 h->plt.plist = NULL;
5842
5843 /* If this is a weak symbol, and there is a real definition, the
5844 processor independent code will have arranged for us to see the
5845 real definition first, and we can just use the same value. */
5846 if (h->u.weakdef != NULL)
5847 {
5848 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5849 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5850 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5851 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5852 if (ELIMINATE_COPY_RELOCS)
5853 h->non_got_ref = h->u.weakdef->non_got_ref;
5854 return TRUE;
5855 }
5856
5857 /* If we are creating a shared library, we must presume that the
5858 only references to the symbol are via the global offset table.
5859 For such cases we need not do anything here; the relocations will
5860 be handled correctly by relocate_section. */
5861 if (info->shared)
5862 return TRUE;
5863
5864 /* If there are no references to this symbol that do not use the
5865 GOT, we don't need to generate a copy reloc. */
5866 if (!h->non_got_ref)
5867 return TRUE;
5868
5869 /* Don't generate a copy reloc for symbols defined in the executable. */
5870 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
5871 return TRUE;
5872
5873 if (ELIMINATE_COPY_RELOCS)
5874 {
5875 struct ppc_link_hash_entry * eh;
5876 struct ppc_dyn_relocs *p;
5877
5878 eh = (struct ppc_link_hash_entry *) h;
5879 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5880 {
5881 s = p->sec->output_section;
5882 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5883 break;
5884 }
5885
5886 /* If we didn't find any dynamic relocs in read-only sections, then
5887 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5888 if (p == NULL)
5889 {
5890 h->non_got_ref = 0;
5891 return TRUE;
5892 }
5893 }
5894
5895 if (h->plt.plist != NULL)
5896 {
5897 /* We should never get here, but unfortunately there are versions
5898 of gcc out there that improperly (for this ABI) put initialized
5899 function pointers, vtable refs and suchlike in read-only
5900 sections. Allow them to proceed, but warn that this might
5901 break at runtime. */
5902 (*_bfd_error_handler)
5903 (_("copy reloc against `%s' requires lazy plt linking; "
5904 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5905 h->root.root.string);
5906 }
5907
5908 /* This is a reference to a symbol defined by a dynamic object which
5909 is not a function. */
5910
5911 if (h->size == 0)
5912 {
5913 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5914 h->root.root.string);
5915 return TRUE;
5916 }
5917
5918 /* We must allocate the symbol in our .dynbss section, which will
5919 become part of the .bss section of the executable. There will be
5920 an entry for this symbol in the .dynsym section. The dynamic
5921 object will contain position independent code, so all references
5922 from the dynamic object to this symbol will go through the global
5923 offset table. The dynamic linker will use the .dynsym entry to
5924 determine the address it must put in the global offset table, so
5925 both the dynamic object and the regular object will refer to the
5926 same memory location for the variable. */
5927
5928 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5929 to copy the initial value out of the dynamic object and into the
5930 runtime process image. We need to remember the offset into the
5931 .rela.bss section we are going to use. */
5932 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5933 {
5934 htab->relbss->size += sizeof (Elf64_External_Rela);
5935 h->needs_copy = 1;
5936 }
5937
5938 s = htab->dynbss;
5939
5940 return _bfd_elf_adjust_dynamic_copy (h, s);
5941 }
5942
5943 /* If given a function descriptor symbol, hide both the function code
5944 sym and the descriptor. */
5945 static void
5946 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5947 struct elf_link_hash_entry *h,
5948 bfd_boolean force_local)
5949 {
5950 struct ppc_link_hash_entry *eh;
5951 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5952
5953 eh = (struct ppc_link_hash_entry *) h;
5954 if (eh->is_func_descriptor)
5955 {
5956 struct ppc_link_hash_entry *fh = eh->oh;
5957
5958 if (fh == NULL)
5959 {
5960 const char *p, *q;
5961 struct ppc_link_hash_table *htab;
5962 char save;
5963
5964 /* We aren't supposed to use alloca in BFD because on
5965 systems which do not have alloca the version in libiberty
5966 calls xmalloc, which might cause the program to crash
5967 when it runs out of memory. This function doesn't have a
5968 return status, so there's no way to gracefully return an
5969 error. So cheat. We know that string[-1] can be safely
5970 accessed; It's either a string in an ELF string table,
5971 or allocated in an objalloc structure. */
5972
5973 p = eh->elf.root.root.string - 1;
5974 save = *p;
5975 *(char *) p = '.';
5976 htab = ppc_hash_table (info);
5977 fh = (struct ppc_link_hash_entry *)
5978 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5979 *(char *) p = save;
5980
5981 /* Unfortunately, if it so happens that the string we were
5982 looking for was allocated immediately before this string,
5983 then we overwrote the string terminator. That's the only
5984 reason the lookup should fail. */
5985 if (fh == NULL)
5986 {
5987 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5988 while (q >= eh->elf.root.root.string && *q == *p)
5989 --q, --p;
5990 if (q < eh->elf.root.root.string && *p == '.')
5991 fh = (struct ppc_link_hash_entry *)
5992 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5993 }
5994 if (fh != NULL)
5995 {
5996 eh->oh = fh;
5997 fh->oh = eh;
5998 }
5999 }
6000 if (fh != NULL)
6001 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6002 }
6003 }
6004
6005 static bfd_boolean
6006 get_sym_h (struct elf_link_hash_entry **hp,
6007 Elf_Internal_Sym **symp,
6008 asection **symsecp,
6009 char **tls_maskp,
6010 Elf_Internal_Sym **locsymsp,
6011 unsigned long r_symndx,
6012 bfd *ibfd)
6013 {
6014 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6015
6016 if (r_symndx >= symtab_hdr->sh_info)
6017 {
6018 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6019 struct elf_link_hash_entry *h;
6020
6021 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6022 while (h->root.type == bfd_link_hash_indirect
6023 || h->root.type == bfd_link_hash_warning)
6024 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6025
6026 if (hp != NULL)
6027 *hp = h;
6028
6029 if (symp != NULL)
6030 *symp = NULL;
6031
6032 if (symsecp != NULL)
6033 {
6034 asection *symsec = NULL;
6035 if (h->root.type == bfd_link_hash_defined
6036 || h->root.type == bfd_link_hash_defweak)
6037 symsec = h->root.u.def.section;
6038 *symsecp = symsec;
6039 }
6040
6041 if (tls_maskp != NULL)
6042 {
6043 struct ppc_link_hash_entry *eh;
6044
6045 eh = (struct ppc_link_hash_entry *) h;
6046 *tls_maskp = &eh->tls_mask;
6047 }
6048 }
6049 else
6050 {
6051 Elf_Internal_Sym *sym;
6052 Elf_Internal_Sym *locsyms = *locsymsp;
6053
6054 if (locsyms == NULL)
6055 {
6056 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6057 if (locsyms == NULL)
6058 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6059 symtab_hdr->sh_info,
6060 0, NULL, NULL, NULL);
6061 if (locsyms == NULL)
6062 return FALSE;
6063 *locsymsp = locsyms;
6064 }
6065 sym = locsyms + r_symndx;
6066
6067 if (hp != NULL)
6068 *hp = NULL;
6069
6070 if (symp != NULL)
6071 *symp = sym;
6072
6073 if (symsecp != NULL)
6074 {
6075 asection *symsec = NULL;
6076 if ((sym->st_shndx != SHN_UNDEF
6077 && sym->st_shndx < SHN_LORESERVE)
6078 || sym->st_shndx > SHN_HIRESERVE)
6079 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6080 *symsecp = symsec;
6081 }
6082
6083 if (tls_maskp != NULL)
6084 {
6085 struct got_entry **lgot_ents;
6086 char *tls_mask;
6087
6088 tls_mask = NULL;
6089 lgot_ents = elf_local_got_ents (ibfd);
6090 if (lgot_ents != NULL)
6091 {
6092 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6093 tls_mask = &lgot_masks[r_symndx];
6094 }
6095 *tls_maskp = tls_mask;
6096 }
6097 }
6098 return TRUE;
6099 }
6100
6101 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6102 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6103 type suitable for optimization, and 1 otherwise. */
6104
6105 static int
6106 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6107 Elf_Internal_Sym **locsymsp,
6108 const Elf_Internal_Rela *rel, bfd *ibfd)
6109 {
6110 unsigned long r_symndx;
6111 int next_r;
6112 struct elf_link_hash_entry *h;
6113 Elf_Internal_Sym *sym;
6114 asection *sec;
6115 bfd_vma off;
6116
6117 r_symndx = ELF64_R_SYM (rel->r_info);
6118 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6119 return 0;
6120
6121 if ((*tls_maskp != NULL && **tls_maskp != 0)
6122 || sec == NULL
6123 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6124 return 1;
6125
6126 /* Look inside a TOC section too. */
6127 if (h != NULL)
6128 {
6129 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6130 off = h->root.u.def.value;
6131 }
6132 else
6133 off = sym->st_value;
6134 off += rel->r_addend;
6135 BFD_ASSERT (off % 8 == 0);
6136 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6137 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6138 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6139 return 0;
6140 if (toc_symndx != NULL)
6141 *toc_symndx = r_symndx;
6142 if ((h == NULL
6143 || ((h->root.type == bfd_link_hash_defined
6144 || h->root.type == bfd_link_hash_defweak)
6145 && !h->def_dynamic))
6146 && (next_r == -1 || next_r == -2))
6147 return 1 - next_r;
6148 return 1;
6149 }
6150
6151 /* Adjust all global syms defined in opd sections. In gcc generated
6152 code for the old ABI, these will already have been done. */
6153
6154 static bfd_boolean
6155 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6156 {
6157 struct ppc_link_hash_entry *eh;
6158 asection *sym_sec;
6159 long *opd_adjust;
6160
6161 if (h->root.type == bfd_link_hash_indirect)
6162 return TRUE;
6163
6164 if (h->root.type == bfd_link_hash_warning)
6165 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6166
6167 if (h->root.type != bfd_link_hash_defined
6168 && h->root.type != bfd_link_hash_defweak)
6169 return TRUE;
6170
6171 eh = (struct ppc_link_hash_entry *) h;
6172 if (eh->adjust_done)
6173 return TRUE;
6174
6175 sym_sec = eh->elf.root.u.def.section;
6176 opd_adjust = get_opd_info (sym_sec);
6177 if (opd_adjust != NULL)
6178 {
6179 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6180 if (adjust == -1)
6181 {
6182 /* This entry has been deleted. */
6183 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6184 if (dsec == NULL)
6185 {
6186 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6187 if (elf_discarded_section (dsec))
6188 {
6189 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6190 break;
6191 }
6192 }
6193 eh->elf.root.u.def.value = 0;
6194 eh->elf.root.u.def.section = dsec;
6195 }
6196 else
6197 eh->elf.root.u.def.value += adjust;
6198 eh->adjust_done = 1;
6199 }
6200 return TRUE;
6201 }
6202
6203 /* Handles decrementing dynamic reloc counts for the reloc specified by
6204 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6205 have already been determined. */
6206
6207 static bfd_boolean
6208 dec_dynrel_count (bfd_vma r_info,
6209 asection *sec,
6210 struct bfd_link_info *info,
6211 Elf_Internal_Sym **local_syms,
6212 struct elf_link_hash_entry *h,
6213 asection *sym_sec)
6214 {
6215 enum elf_ppc64_reloc_type r_type;
6216 struct ppc_dyn_relocs *p;
6217 struct ppc_dyn_relocs **pp;
6218
6219 /* Can this reloc be dynamic? This switch, and later tests here
6220 should be kept in sync with the code in check_relocs. */
6221 r_type = ELF64_R_TYPE (r_info);
6222 switch (r_type)
6223 {
6224 default:
6225 return TRUE;
6226
6227 case R_PPC64_TPREL16:
6228 case R_PPC64_TPREL16_LO:
6229 case R_PPC64_TPREL16_HI:
6230 case R_PPC64_TPREL16_HA:
6231 case R_PPC64_TPREL16_DS:
6232 case R_PPC64_TPREL16_LO_DS:
6233 case R_PPC64_TPREL16_HIGHER:
6234 case R_PPC64_TPREL16_HIGHERA:
6235 case R_PPC64_TPREL16_HIGHEST:
6236 case R_PPC64_TPREL16_HIGHESTA:
6237 if (!info->shared)
6238 return TRUE;
6239
6240 case R_PPC64_TPREL64:
6241 case R_PPC64_DTPMOD64:
6242 case R_PPC64_DTPREL64:
6243 case R_PPC64_ADDR64:
6244 case R_PPC64_REL30:
6245 case R_PPC64_REL32:
6246 case R_PPC64_REL64:
6247 case R_PPC64_ADDR14:
6248 case R_PPC64_ADDR14_BRNTAKEN:
6249 case R_PPC64_ADDR14_BRTAKEN:
6250 case R_PPC64_ADDR16:
6251 case R_PPC64_ADDR16_DS:
6252 case R_PPC64_ADDR16_HA:
6253 case R_PPC64_ADDR16_HI:
6254 case R_PPC64_ADDR16_HIGHER:
6255 case R_PPC64_ADDR16_HIGHERA:
6256 case R_PPC64_ADDR16_HIGHEST:
6257 case R_PPC64_ADDR16_HIGHESTA:
6258 case R_PPC64_ADDR16_LO:
6259 case R_PPC64_ADDR16_LO_DS:
6260 case R_PPC64_ADDR24:
6261 case R_PPC64_ADDR32:
6262 case R_PPC64_UADDR16:
6263 case R_PPC64_UADDR32:
6264 case R_PPC64_UADDR64:
6265 case R_PPC64_TOC:
6266 break;
6267 }
6268
6269 if (local_syms != NULL)
6270 {
6271 unsigned long r_symndx;
6272 Elf_Internal_Sym *sym;
6273 bfd *ibfd = sec->owner;
6274
6275 r_symndx = ELF64_R_SYM (r_info);
6276 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6277 return FALSE;
6278 }
6279
6280 if ((info->shared
6281 && (MUST_BE_DYN_RELOC (r_type)
6282 || (h != NULL
6283 && (!info->symbolic
6284 || h->root.type == bfd_link_hash_defweak
6285 || !h->def_regular))))
6286 || (ELIMINATE_COPY_RELOCS
6287 && !info->shared
6288 && h != NULL
6289 && (h->root.type == bfd_link_hash_defweak
6290 || !h->def_regular)))
6291 ;
6292 else
6293 return TRUE;
6294
6295 if (h != NULL)
6296 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6297 else
6298 {
6299 if (sym_sec != NULL)
6300 {
6301 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6302 pp = (struct ppc_dyn_relocs **) vpp;
6303 }
6304 else
6305 {
6306 void *vpp = &elf_section_data (sec)->local_dynrel;
6307 pp = (struct ppc_dyn_relocs **) vpp;
6308 }
6309
6310 /* elf_gc_sweep may have already removed all dyn relocs associated
6311 with local syms for a given section. Don't report a dynreloc
6312 miscount. */
6313 if (*pp == NULL)
6314 return TRUE;
6315 }
6316
6317 while ((p = *pp) != NULL)
6318 {
6319 if (p->sec == sec)
6320 {
6321 if (!MUST_BE_DYN_RELOC (r_type))
6322 p->pc_count -= 1;
6323 p->count -= 1;
6324 if (p->count == 0)
6325 *pp = p->next;
6326 return TRUE;
6327 }
6328 pp = &p->next;
6329 }
6330
6331 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6332 sec->owner, sec);
6333 bfd_set_error (bfd_error_bad_value);
6334 return FALSE;
6335 }
6336
6337 /* Remove unused Official Procedure Descriptor entries. Currently we
6338 only remove those associated with functions in discarded link-once
6339 sections, or weakly defined functions that have been overridden. It
6340 would be possible to remove many more entries for statically linked
6341 applications. */
6342
6343 bfd_boolean
6344 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6345 bfd_boolean no_opd_opt,
6346 bfd_boolean non_overlapping)
6347 {
6348 bfd *ibfd;
6349 bfd_boolean some_edited = FALSE;
6350 asection *need_pad = NULL;
6351
6352 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6353 {
6354 asection *sec;
6355 Elf_Internal_Rela *relstart, *rel, *relend;
6356 Elf_Internal_Shdr *symtab_hdr;
6357 Elf_Internal_Sym *local_syms;
6358 struct elf_link_hash_entry **sym_hashes;
6359 bfd_vma offset;
6360 bfd_size_type amt;
6361 long *opd_adjust;
6362 bfd_boolean need_edit, add_aux_fields;
6363 bfd_size_type cnt_16b = 0;
6364
6365 sec = bfd_get_section_by_name (ibfd, ".opd");
6366 if (sec == NULL || sec->size == 0)
6367 continue;
6368
6369 amt = sec->size * sizeof (long) / 8;
6370 opd_adjust = get_opd_info (sec);
6371 if (opd_adjust == NULL)
6372 {
6373 /* check_relocs hasn't been called. Must be a ld -r link
6374 or --just-symbols object. */
6375 opd_adjust = bfd_alloc (obfd, amt);
6376 if (opd_adjust == NULL)
6377 return FALSE;
6378 ppc64_elf_section_data (sec)->u.opd_adjust = opd_adjust;
6379 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
6380 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6381 }
6382 memset (opd_adjust, 0, amt);
6383
6384 if (no_opd_opt)
6385 continue;
6386
6387 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6388 continue;
6389
6390 if (sec->output_section == bfd_abs_section_ptr)
6391 continue;
6392
6393 /* Look through the section relocs. */
6394 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6395 continue;
6396
6397 local_syms = NULL;
6398 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6399 sym_hashes = elf_sym_hashes (ibfd);
6400
6401 /* Read the relocations. */
6402 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6403 info->keep_memory);
6404 if (relstart == NULL)
6405 return FALSE;
6406
6407 /* First run through the relocs to check they are sane, and to
6408 determine whether we need to edit this opd section. */
6409 need_edit = FALSE;
6410 need_pad = sec;
6411 offset = 0;
6412 relend = relstart + sec->reloc_count;
6413 for (rel = relstart; rel < relend; )
6414 {
6415 enum elf_ppc64_reloc_type r_type;
6416 unsigned long r_symndx;
6417 asection *sym_sec;
6418 struct elf_link_hash_entry *h;
6419 Elf_Internal_Sym *sym;
6420
6421 /* .opd contains a regular array of 16 or 24 byte entries. We're
6422 only interested in the reloc pointing to a function entry
6423 point. */
6424 if (rel->r_offset != offset
6425 || rel + 1 >= relend
6426 || (rel + 1)->r_offset != offset + 8)
6427 {
6428 /* If someone messes with .opd alignment then after a
6429 "ld -r" we might have padding in the middle of .opd.
6430 Also, there's nothing to prevent someone putting
6431 something silly in .opd with the assembler. No .opd
6432 optimization for them! */
6433 broken_opd:
6434 (*_bfd_error_handler)
6435 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6436 need_edit = FALSE;
6437 break;
6438 }
6439
6440 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6441 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6442 {
6443 (*_bfd_error_handler)
6444 (_("%B: unexpected reloc type %u in .opd section"),
6445 ibfd, r_type);
6446 need_edit = FALSE;
6447 break;
6448 }
6449
6450 r_symndx = ELF64_R_SYM (rel->r_info);
6451 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6452 r_symndx, ibfd))
6453 goto error_ret;
6454
6455 if (sym_sec == NULL || sym_sec->owner == NULL)
6456 {
6457 const char *sym_name;
6458 if (h != NULL)
6459 sym_name = h->root.root.string;
6460 else
6461 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6462 sym_sec);
6463
6464 (*_bfd_error_handler)
6465 (_("%B: undefined sym `%s' in .opd section"),
6466 ibfd, sym_name);
6467 need_edit = FALSE;
6468 break;
6469 }
6470
6471 /* opd entries are always for functions defined in the
6472 current input bfd. If the symbol isn't defined in the
6473 input bfd, then we won't be using the function in this
6474 bfd; It must be defined in a linkonce section in another
6475 bfd, or is weak. It's also possible that we are
6476 discarding the function due to a linker script /DISCARD/,
6477 which we test for via the output_section. */
6478 if (sym_sec->owner != ibfd
6479 || sym_sec->output_section == bfd_abs_section_ptr)
6480 need_edit = TRUE;
6481
6482 rel += 2;
6483 if (rel == relend
6484 || (rel + 1 == relend && rel->r_offset == offset + 16))
6485 {
6486 if (sec->size == offset + 24)
6487 {
6488 need_pad = NULL;
6489 break;
6490 }
6491 if (rel == relend && sec->size == offset + 16)
6492 {
6493 cnt_16b++;
6494 break;
6495 }
6496 goto broken_opd;
6497 }
6498
6499 if (rel->r_offset == offset + 24)
6500 offset += 24;
6501 else if (rel->r_offset != offset + 16)
6502 goto broken_opd;
6503 else if (rel + 1 < relend
6504 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6505 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6506 {
6507 offset += 16;
6508 cnt_16b++;
6509 }
6510 else if (rel + 2 < relend
6511 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6512 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6513 {
6514 offset += 24;
6515 rel += 1;
6516 }
6517 else
6518 goto broken_opd;
6519 }
6520
6521 add_aux_fields = non_overlapping && cnt_16b > 0;
6522
6523 if (need_edit || add_aux_fields)
6524 {
6525 Elf_Internal_Rela *write_rel;
6526 bfd_byte *rptr, *wptr;
6527 bfd_byte *new_contents = NULL;
6528 bfd_boolean skip;
6529 long opd_ent_size;
6530
6531 /* This seems a waste of time as input .opd sections are all
6532 zeros as generated by gcc, but I suppose there's no reason
6533 this will always be so. We might start putting something in
6534 the third word of .opd entries. */
6535 if ((sec->flags & SEC_IN_MEMORY) == 0)
6536 {
6537 bfd_byte *loc;
6538 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6539 {
6540 if (loc != NULL)
6541 free (loc);
6542 error_ret:
6543 if (local_syms != NULL
6544 && symtab_hdr->contents != (unsigned char *) local_syms)
6545 free (local_syms);
6546 if (elf_section_data (sec)->relocs != relstart)
6547 free (relstart);
6548 return FALSE;
6549 }
6550 sec->contents = loc;
6551 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6552 }
6553
6554 elf_section_data (sec)->relocs = relstart;
6555
6556 new_contents = sec->contents;
6557 if (add_aux_fields)
6558 {
6559 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6560 if (new_contents == NULL)
6561 return FALSE;
6562 need_pad = FALSE;
6563 }
6564 wptr = new_contents;
6565 rptr = sec->contents;
6566
6567 write_rel = relstart;
6568 skip = FALSE;
6569 offset = 0;
6570 opd_ent_size = 0;
6571 for (rel = relstart; rel < relend; rel++)
6572 {
6573 unsigned long r_symndx;
6574 asection *sym_sec;
6575 struct elf_link_hash_entry *h;
6576 Elf_Internal_Sym *sym;
6577
6578 r_symndx = ELF64_R_SYM (rel->r_info);
6579 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6580 r_symndx, ibfd))
6581 goto error_ret;
6582
6583 if (rel->r_offset == offset)
6584 {
6585 struct ppc_link_hash_entry *fdh = NULL;
6586
6587 /* See if the .opd entry is full 24 byte or
6588 16 byte (with fd_aux entry overlapped with next
6589 fd_func). */
6590 opd_ent_size = 24;
6591 if ((rel + 2 == relend && sec->size == offset + 16)
6592 || (rel + 3 < relend
6593 && rel[2].r_offset == offset + 16
6594 && rel[3].r_offset == offset + 24
6595 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6596 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6597 opd_ent_size = 16;
6598
6599 if (h != NULL
6600 && h->root.root.string[0] == '.')
6601 {
6602 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6603 ppc_hash_table (info));
6604 if (fdh != NULL
6605 && fdh->elf.root.type != bfd_link_hash_defined
6606 && fdh->elf.root.type != bfd_link_hash_defweak)
6607 fdh = NULL;
6608 }
6609
6610 skip = (sym_sec->owner != ibfd
6611 || sym_sec->output_section == bfd_abs_section_ptr);
6612 if (skip)
6613 {
6614 if (fdh != NULL && sym_sec->owner == ibfd)
6615 {
6616 /* Arrange for the function descriptor sym
6617 to be dropped. */
6618 fdh->elf.root.u.def.value = 0;
6619 fdh->elf.root.u.def.section = sym_sec;
6620 }
6621 opd_adjust[rel->r_offset / 8] = -1;
6622 }
6623 else
6624 {
6625 /* We'll be keeping this opd entry. */
6626
6627 if (fdh != NULL)
6628 {
6629 /* Redefine the function descriptor symbol to
6630 this location in the opd section. It is
6631 necessary to update the value here rather
6632 than using an array of adjustments as we do
6633 for local symbols, because various places
6634 in the generic ELF code use the value
6635 stored in u.def.value. */
6636 fdh->elf.root.u.def.value = wptr - new_contents;
6637 fdh->adjust_done = 1;
6638 }
6639
6640 /* Local syms are a bit tricky. We could
6641 tweak them as they can be cached, but
6642 we'd need to look through the local syms
6643 for the function descriptor sym which we
6644 don't have at the moment. So keep an
6645 array of adjustments. */
6646 opd_adjust[rel->r_offset / 8]
6647 = (wptr - new_contents) - (rptr - sec->contents);
6648
6649 if (wptr != rptr)
6650 memcpy (wptr, rptr, opd_ent_size);
6651 wptr += opd_ent_size;
6652 if (add_aux_fields && opd_ent_size == 16)
6653 {
6654 memset (wptr, '\0', 8);
6655 wptr += 8;
6656 }
6657 }
6658 rptr += opd_ent_size;
6659 offset += opd_ent_size;
6660 }
6661
6662 if (skip)
6663 {
6664 if (!NO_OPD_RELOCS
6665 && !info->relocatable
6666 && !dec_dynrel_count (rel->r_info, sec, info,
6667 NULL, h, sym_sec))
6668 goto error_ret;
6669 }
6670 else
6671 {
6672 /* We need to adjust any reloc offsets to point to the
6673 new opd entries. While we're at it, we may as well
6674 remove redundant relocs. */
6675 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6676 if (write_rel != rel)
6677 memcpy (write_rel, rel, sizeof (*rel));
6678 ++write_rel;
6679 }
6680 }
6681
6682 sec->size = wptr - new_contents;
6683 sec->reloc_count = write_rel - relstart;
6684 if (add_aux_fields)
6685 {
6686 free (sec->contents);
6687 sec->contents = new_contents;
6688 }
6689
6690 /* Fudge the header size too, as this is used later in
6691 elf_bfd_final_link if we are emitting relocs. */
6692 elf_section_data (sec)->rel_hdr.sh_size
6693 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6694 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6695 some_edited = TRUE;
6696 }
6697 else if (elf_section_data (sec)->relocs != relstart)
6698 free (relstart);
6699
6700 if (local_syms != NULL
6701 && symtab_hdr->contents != (unsigned char *) local_syms)
6702 {
6703 if (!info->keep_memory)
6704 free (local_syms);
6705 else
6706 symtab_hdr->contents = (unsigned char *) local_syms;
6707 }
6708 }
6709
6710 if (some_edited)
6711 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6712
6713 /* If we are doing a final link and the last .opd entry is just 16 byte
6714 long, add a 8 byte padding after it. */
6715 if (need_pad != NULL && !info->relocatable)
6716 {
6717 bfd_byte *p;
6718
6719 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6720 {
6721 BFD_ASSERT (need_pad->size > 0);
6722
6723 p = bfd_malloc (need_pad->size + 8);
6724 if (p == NULL)
6725 return FALSE;
6726
6727 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6728 p, 0, need_pad->size))
6729 return FALSE;
6730
6731 need_pad->contents = p;
6732 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6733 }
6734 else
6735 {
6736 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6737 if (p == NULL)
6738 return FALSE;
6739
6740 need_pad->contents = p;
6741 }
6742
6743 memset (need_pad->contents + need_pad->size, 0, 8);
6744 need_pad->size += 8;
6745 }
6746
6747 return TRUE;
6748 }
6749
6750 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6751
6752 asection *
6753 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6754 {
6755 struct ppc_link_hash_table *htab;
6756
6757 htab = ppc_hash_table (info);
6758 if (htab->tls_get_addr != NULL)
6759 {
6760 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6761
6762 while (h->elf.root.type == bfd_link_hash_indirect
6763 || h->elf.root.type == bfd_link_hash_warning)
6764 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6765
6766 htab->tls_get_addr = h;
6767
6768 if (htab->tls_get_addr_fd == NULL
6769 && h->oh != NULL
6770 && h->oh->is_func_descriptor
6771 && (h->oh->elf.root.type == bfd_link_hash_defined
6772 || h->oh->elf.root.type == bfd_link_hash_defweak))
6773 htab->tls_get_addr_fd = h->oh;
6774 }
6775
6776 if (htab->tls_get_addr_fd != NULL)
6777 {
6778 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6779
6780 while (h->elf.root.type == bfd_link_hash_indirect
6781 || h->elf.root.type == bfd_link_hash_warning)
6782 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6783
6784 htab->tls_get_addr_fd = h;
6785 }
6786
6787 return _bfd_elf_tls_setup (obfd, info);
6788 }
6789
6790 /* Run through all the TLS relocs looking for optimization
6791 opportunities. The linker has been hacked (see ppc64elf.em) to do
6792 a preliminary section layout so that we know the TLS segment
6793 offsets. We can't optimize earlier because some optimizations need
6794 to know the tp offset, and we need to optimize before allocating
6795 dynamic relocations. */
6796
6797 bfd_boolean
6798 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6799 {
6800 bfd *ibfd;
6801 asection *sec;
6802 struct ppc_link_hash_table *htab;
6803 int pass;
6804
6805 if (info->relocatable || info->shared)
6806 return TRUE;
6807
6808 htab = ppc_hash_table (info);
6809 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6810 {
6811 Elf_Internal_Sym *locsyms = NULL;
6812 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6813 unsigned char *toc_ref = NULL;
6814
6815 /* Look at all the sections for this file. Make two passes over
6816 the relocs. On the first pass, mark toc entries involved
6817 with tls relocs, and check that tls relocs involved in
6818 setting up a tls_get_addr call are indeed followed by such a
6819 call. If they are not, exclude them from the optimizations
6820 done on the second pass. */
6821 for (pass = 0; pass < 2; ++pass)
6822 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6823 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6824 {
6825 Elf_Internal_Rela *relstart, *rel, *relend;
6826
6827 /* Read the relocations. */
6828 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6829 info->keep_memory);
6830 if (relstart == NULL)
6831 return FALSE;
6832
6833 relend = relstart + sec->reloc_count;
6834 for (rel = relstart; rel < relend; rel++)
6835 {
6836 enum elf_ppc64_reloc_type r_type;
6837 unsigned long r_symndx;
6838 struct elf_link_hash_entry *h;
6839 Elf_Internal_Sym *sym;
6840 asection *sym_sec;
6841 char *tls_mask;
6842 char tls_set, tls_clear, tls_type = 0;
6843 bfd_vma value;
6844 bfd_boolean ok_tprel, is_local;
6845 long toc_ref_index = 0;
6846 int expecting_tls_get_addr = 0;
6847
6848 r_symndx = ELF64_R_SYM (rel->r_info);
6849 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6850 r_symndx, ibfd))
6851 {
6852 err_free_rel:
6853 if (elf_section_data (sec)->relocs != relstart)
6854 free (relstart);
6855 if (toc_ref != NULL)
6856 free (toc_ref);
6857 if (locsyms != NULL
6858 && (elf_tdata (ibfd)->symtab_hdr.contents
6859 != (unsigned char *) locsyms))
6860 free (locsyms);
6861 return FALSE;
6862 }
6863
6864 if (h != NULL)
6865 {
6866 if (h->root.type != bfd_link_hash_defined
6867 && h->root.type != bfd_link_hash_defweak)
6868 continue;
6869 value = h->root.u.def.value;
6870 }
6871 else
6872 /* Symbols referenced by TLS relocs must be of type
6873 STT_TLS. So no need for .opd local sym adjust. */
6874 value = sym->st_value;
6875
6876 ok_tprel = FALSE;
6877 is_local = FALSE;
6878 if (h == NULL
6879 || !h->def_dynamic)
6880 {
6881 is_local = TRUE;
6882 value += sym_sec->output_offset;
6883 value += sym_sec->output_section->vma;
6884 value -= htab->elf.tls_sec->vma;
6885 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6886 < (bfd_vma) 1 << 32);
6887 }
6888
6889 r_type = ELF64_R_TYPE (rel->r_info);
6890 switch (r_type)
6891 {
6892 case R_PPC64_GOT_TLSLD16:
6893 case R_PPC64_GOT_TLSLD16_LO:
6894 expecting_tls_get_addr = 1;
6895 /* Fall thru */
6896
6897 case R_PPC64_GOT_TLSLD16_HI:
6898 case R_PPC64_GOT_TLSLD16_HA:
6899 /* These relocs should never be against a symbol
6900 defined in a shared lib. Leave them alone if
6901 that turns out to be the case. */
6902 if (!is_local)
6903 continue;
6904
6905 /* LD -> LE */
6906 tls_set = 0;
6907 tls_clear = TLS_LD;
6908 tls_type = TLS_TLS | TLS_LD;
6909 break;
6910
6911 case R_PPC64_GOT_TLSGD16:
6912 case R_PPC64_GOT_TLSGD16_LO:
6913 expecting_tls_get_addr = 1;
6914 /* Fall thru */
6915
6916 case R_PPC64_GOT_TLSGD16_HI:
6917 case R_PPC64_GOT_TLSGD16_HA:
6918 if (ok_tprel)
6919 /* GD -> LE */
6920 tls_set = 0;
6921 else
6922 /* GD -> IE */
6923 tls_set = TLS_TLS | TLS_TPRELGD;
6924 tls_clear = TLS_GD;
6925 tls_type = TLS_TLS | TLS_GD;
6926 break;
6927
6928 case R_PPC64_GOT_TPREL16_DS:
6929 case R_PPC64_GOT_TPREL16_LO_DS:
6930 case R_PPC64_GOT_TPREL16_HI:
6931 case R_PPC64_GOT_TPREL16_HA:
6932 if (ok_tprel)
6933 {
6934 /* IE -> LE */
6935 tls_set = 0;
6936 tls_clear = TLS_TPREL;
6937 tls_type = TLS_TLS | TLS_TPREL;
6938 break;
6939 }
6940 continue;
6941
6942 case R_PPC64_TOC16:
6943 case R_PPC64_TOC16_LO:
6944 case R_PPC64_TLS:
6945 if (sym_sec == NULL || sym_sec != toc)
6946 continue;
6947
6948 /* Mark this toc entry as referenced by a TLS
6949 code sequence. We can do that now in the
6950 case of R_PPC64_TLS, and after checking for
6951 tls_get_addr for the TOC16 relocs. */
6952 if (toc_ref == NULL)
6953 {
6954 toc_ref = bfd_zmalloc (toc->size / 8);
6955 if (toc_ref == NULL)
6956 goto err_free_rel;
6957 }
6958 if (h != NULL)
6959 value = h->root.u.def.value;
6960 else
6961 value = sym->st_value;
6962 value += rel->r_addend;
6963 BFD_ASSERT (value < toc->size && value % 8 == 0);
6964 toc_ref_index = value / 8;
6965 if (r_type == R_PPC64_TLS)
6966 {
6967 toc_ref[toc_ref_index] = 1;
6968 continue;
6969 }
6970
6971 if (pass != 0 && toc_ref[toc_ref_index] == 0)
6972 continue;
6973
6974 tls_set = 0;
6975 tls_clear = 0;
6976 expecting_tls_get_addr = 2;
6977 break;
6978
6979 case R_PPC64_TPREL64:
6980 if (pass == 0
6981 || sec != toc
6982 || toc_ref == NULL
6983 || !toc_ref[rel->r_offset / 8])
6984 continue;
6985 if (ok_tprel)
6986 {
6987 /* IE -> LE */
6988 tls_set = TLS_EXPLICIT;
6989 tls_clear = TLS_TPREL;
6990 break;
6991 }
6992 continue;
6993
6994 case R_PPC64_DTPMOD64:
6995 if (pass == 0
6996 || sec != toc
6997 || toc_ref == NULL
6998 || !toc_ref[rel->r_offset / 8])
6999 continue;
7000 if (rel + 1 < relend
7001 && (rel[1].r_info
7002 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7003 && rel[1].r_offset == rel->r_offset + 8)
7004 {
7005 if (ok_tprel)
7006 /* GD -> LE */
7007 tls_set = TLS_EXPLICIT | TLS_GD;
7008 else
7009 /* GD -> IE */
7010 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7011 tls_clear = TLS_GD;
7012 }
7013 else
7014 {
7015 if (!is_local)
7016 continue;
7017
7018 /* LD -> LE */
7019 tls_set = TLS_EXPLICIT;
7020 tls_clear = TLS_LD;
7021 }
7022 break;
7023
7024 default:
7025 continue;
7026 }
7027
7028 if (pass == 0)
7029 {
7030 if (!expecting_tls_get_addr)
7031 continue;
7032
7033 if (rel + 1 < relend)
7034 {
7035 Elf_Internal_Shdr *symtab_hdr;
7036 enum elf_ppc64_reloc_type r_type2;
7037 unsigned long r_symndx2;
7038 struct elf_link_hash_entry *h2;
7039
7040 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7041
7042 /* The next instruction should be a call to
7043 __tls_get_addr. Peek at the reloc to be sure. */
7044 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7045 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7046 if (r_symndx2 >= symtab_hdr->sh_info
7047 && (r_type2 == R_PPC64_REL14
7048 || r_type2 == R_PPC64_REL14_BRTAKEN
7049 || r_type2 == R_PPC64_REL14_BRNTAKEN
7050 || r_type2 == R_PPC64_REL24))
7051 {
7052 struct elf_link_hash_entry **sym_hashes;
7053
7054 sym_hashes = elf_sym_hashes (ibfd);
7055
7056 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7057 while (h2->root.type == bfd_link_hash_indirect
7058 || h2->root.type == bfd_link_hash_warning)
7059 h2 = ((struct elf_link_hash_entry *)
7060 h2->root.u.i.link);
7061 if (h2 != NULL
7062 && (h2 == &htab->tls_get_addr->elf
7063 || h2 == &htab->tls_get_addr_fd->elf))
7064 {
7065 if (expecting_tls_get_addr == 2)
7066 {
7067 /* Check for toc tls entries. */
7068 char *toc_tls;
7069 int retval;
7070
7071 retval = get_tls_mask (&toc_tls, NULL,
7072 &locsyms,
7073 rel, ibfd);
7074 if (retval == 0)
7075 goto err_free_rel;
7076 if (retval > 1 && toc_tls != NULL)
7077 toc_ref[toc_ref_index] = 1;
7078 }
7079 continue;
7080 }
7081 }
7082 }
7083
7084 if (expecting_tls_get_addr != 1)
7085 continue;
7086
7087 /* Uh oh, we didn't find the expected call. We
7088 could just mark this symbol to exclude it
7089 from tls optimization but it's safer to skip
7090 the entire section. */
7091 sec->has_tls_reloc = 0;
7092 break;
7093 }
7094
7095 if (expecting_tls_get_addr)
7096 {
7097 struct plt_entry *ent;
7098 for (ent = htab->tls_get_addr->elf.plt.plist;
7099 ent != NULL;
7100 ent = ent->next)
7101 if (ent->addend == 0)
7102 {
7103 if (ent->plt.refcount > 0)
7104 {
7105 ent->plt.refcount -= 1;
7106 expecting_tls_get_addr = 0;
7107 }
7108 break;
7109 }
7110 }
7111
7112 if (expecting_tls_get_addr)
7113 {
7114 struct plt_entry *ent;
7115 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7116 ent != NULL;
7117 ent = ent->next)
7118 if (ent->addend == 0)
7119 {
7120 if (ent->plt.refcount > 0)
7121 ent->plt.refcount -= 1;
7122 break;
7123 }
7124 }
7125
7126 if (tls_clear == 0)
7127 continue;
7128
7129 if ((tls_set & TLS_EXPLICIT) == 0)
7130 {
7131 struct got_entry *ent;
7132
7133 /* Adjust got entry for this reloc. */
7134 if (h != NULL)
7135 ent = h->got.glist;
7136 else
7137 ent = elf_local_got_ents (ibfd)[r_symndx];
7138
7139 for (; ent != NULL; ent = ent->next)
7140 if (ent->addend == rel->r_addend
7141 && ent->owner == ibfd
7142 && ent->tls_type == tls_type)
7143 break;
7144 if (ent == NULL)
7145 abort ();
7146
7147 if (tls_set == 0)
7148 {
7149 /* We managed to get rid of a got entry. */
7150 if (ent->got.refcount > 0)
7151 ent->got.refcount -= 1;
7152 }
7153 }
7154 else
7155 {
7156 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7157 we'll lose one or two dyn relocs. */
7158 if (!dec_dynrel_count (rel->r_info, sec, info,
7159 NULL, h, sym_sec))
7160 return FALSE;
7161
7162 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7163 {
7164 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7165 NULL, h, sym_sec))
7166 return FALSE;
7167 }
7168 }
7169
7170 *tls_mask |= tls_set;
7171 *tls_mask &= ~tls_clear;
7172 }
7173
7174 if (elf_section_data (sec)->relocs != relstart)
7175 free (relstart);
7176 }
7177
7178 if (toc_ref != NULL)
7179 free (toc_ref);
7180
7181 if (locsyms != NULL
7182 && (elf_tdata (ibfd)->symtab_hdr.contents
7183 != (unsigned char *) locsyms))
7184 {
7185 if (!info->keep_memory)
7186 free (locsyms);
7187 else
7188 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7189 }
7190 }
7191 return TRUE;
7192 }
7193
7194 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7195 the values of any global symbols in a toc section that has been
7196 edited. Globals in toc sections should be a rarity, so this function
7197 sets a flag if any are found in toc sections other than the one just
7198 edited, so that futher hash table traversals can be avoided. */
7199
7200 struct adjust_toc_info
7201 {
7202 asection *toc;
7203 unsigned long *skip;
7204 bfd_boolean global_toc_syms;
7205 };
7206
7207 static bfd_boolean
7208 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7209 {
7210 struct ppc_link_hash_entry *eh;
7211 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7212
7213 if (h->root.type == bfd_link_hash_indirect)
7214 return TRUE;
7215
7216 if (h->root.type == bfd_link_hash_warning)
7217 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7218
7219 if (h->root.type != bfd_link_hash_defined
7220 && h->root.type != bfd_link_hash_defweak)
7221 return TRUE;
7222
7223 eh = (struct ppc_link_hash_entry *) h;
7224 if (eh->adjust_done)
7225 return TRUE;
7226
7227 if (eh->elf.root.u.def.section == toc_inf->toc)
7228 {
7229 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7230 if (skip != (unsigned long) -1)
7231 eh->elf.root.u.def.value -= skip;
7232 else
7233 {
7234 (*_bfd_error_handler)
7235 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7236 eh->elf.root.u.def.section = &bfd_abs_section;
7237 eh->elf.root.u.def.value = 0;
7238 }
7239 eh->adjust_done = 1;
7240 }
7241 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7242 toc_inf->global_toc_syms = TRUE;
7243
7244 return TRUE;
7245 }
7246
7247 /* Examine all relocs referencing .toc sections in order to remove
7248 unused .toc entries. */
7249
7250 bfd_boolean
7251 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7252 {
7253 bfd *ibfd;
7254 struct adjust_toc_info toc_inf;
7255
7256 toc_inf.global_toc_syms = TRUE;
7257 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7258 {
7259 asection *toc, *sec;
7260 Elf_Internal_Shdr *symtab_hdr;
7261 Elf_Internal_Sym *local_syms;
7262 struct elf_link_hash_entry **sym_hashes;
7263 Elf_Internal_Rela *relstart, *rel;
7264 unsigned long *skip, *drop;
7265 unsigned char *used;
7266 unsigned char *keep, last, some_unused;
7267
7268 toc = bfd_get_section_by_name (ibfd, ".toc");
7269 if (toc == NULL
7270 || toc->size == 0
7271 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7272 || elf_discarded_section (toc))
7273 continue;
7274
7275 local_syms = NULL;
7276 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7277 sym_hashes = elf_sym_hashes (ibfd);
7278
7279 /* Look at sections dropped from the final link. */
7280 skip = NULL;
7281 relstart = NULL;
7282 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7283 {
7284 if (sec->reloc_count == 0
7285 || !elf_discarded_section (sec)
7286 || get_opd_info (sec)
7287 || (sec->flags & SEC_ALLOC) == 0
7288 || (sec->flags & SEC_DEBUGGING) != 0)
7289 continue;
7290
7291 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7292 if (relstart == NULL)
7293 goto error_ret;
7294
7295 /* Run through the relocs to see which toc entries might be
7296 unused. */
7297 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7298 {
7299 enum elf_ppc64_reloc_type r_type;
7300 unsigned long r_symndx;
7301 asection *sym_sec;
7302 struct elf_link_hash_entry *h;
7303 Elf_Internal_Sym *sym;
7304 bfd_vma val;
7305
7306 r_type = ELF64_R_TYPE (rel->r_info);
7307 switch (r_type)
7308 {
7309 default:
7310 continue;
7311
7312 case R_PPC64_TOC16:
7313 case R_PPC64_TOC16_LO:
7314 case R_PPC64_TOC16_HI:
7315 case R_PPC64_TOC16_HA:
7316 case R_PPC64_TOC16_DS:
7317 case R_PPC64_TOC16_LO_DS:
7318 break;
7319 }
7320
7321 r_symndx = ELF64_R_SYM (rel->r_info);
7322 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7323 r_symndx, ibfd))
7324 goto error_ret;
7325
7326 if (sym_sec != toc)
7327 continue;
7328
7329 if (h != NULL)
7330 val = h->root.u.def.value;
7331 else
7332 val = sym->st_value;
7333 val += rel->r_addend;
7334
7335 if (val >= toc->size)
7336 continue;
7337
7338 /* Anything in the toc ought to be aligned to 8 bytes.
7339 If not, don't mark as unused. */
7340 if (val & 7)
7341 continue;
7342
7343 if (skip == NULL)
7344 {
7345 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7346 if (skip == NULL)
7347 goto error_ret;
7348 }
7349
7350 skip[val >> 3] = 1;
7351 }
7352
7353 if (elf_section_data (sec)->relocs != relstart)
7354 free (relstart);
7355 }
7356
7357 if (skip == NULL)
7358 continue;
7359
7360 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7361 if (used == NULL)
7362 {
7363 error_ret:
7364 if (local_syms != NULL
7365 && symtab_hdr->contents != (unsigned char *) local_syms)
7366 free (local_syms);
7367 if (sec != NULL
7368 && relstart != NULL
7369 && elf_section_data (sec)->relocs != relstart)
7370 free (relstart);
7371 if (skip != NULL)
7372 free (skip);
7373 return FALSE;
7374 }
7375
7376 /* Now check all kept sections that might reference the toc.
7377 Check the toc itself last. */
7378 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7379 : ibfd->sections);
7380 sec != NULL;
7381 sec = (sec == toc ? NULL
7382 : sec->next == NULL ? toc
7383 : sec->next == toc && toc->next ? toc->next
7384 : sec->next))
7385 {
7386 int repeat;
7387
7388 if (sec->reloc_count == 0
7389 || elf_discarded_section (sec)
7390 || get_opd_info (sec)
7391 || (sec->flags & SEC_ALLOC) == 0
7392 || (sec->flags & SEC_DEBUGGING) != 0)
7393 continue;
7394
7395 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7396 if (relstart == NULL)
7397 goto error_ret;
7398
7399 /* Mark toc entries referenced as used. */
7400 repeat = 0;
7401 do
7402 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7403 {
7404 enum elf_ppc64_reloc_type r_type;
7405 unsigned long r_symndx;
7406 asection *sym_sec;
7407 struct elf_link_hash_entry *h;
7408 Elf_Internal_Sym *sym;
7409 bfd_vma val;
7410
7411 r_type = ELF64_R_TYPE (rel->r_info);
7412 switch (r_type)
7413 {
7414 case R_PPC64_TOC16:
7415 case R_PPC64_TOC16_LO:
7416 case R_PPC64_TOC16_HI:
7417 case R_PPC64_TOC16_HA:
7418 case R_PPC64_TOC16_DS:
7419 case R_PPC64_TOC16_LO_DS:
7420 /* In case we're taking addresses of toc entries. */
7421 case R_PPC64_ADDR64:
7422 break;
7423
7424 default:
7425 continue;
7426 }
7427
7428 r_symndx = ELF64_R_SYM (rel->r_info);
7429 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7430 r_symndx, ibfd))
7431 {
7432 free (used);
7433 goto error_ret;
7434 }
7435
7436 if (sym_sec != toc)
7437 continue;
7438
7439 if (h != NULL)
7440 val = h->root.u.def.value;
7441 else
7442 val = sym->st_value;
7443 val += rel->r_addend;
7444
7445 if (val >= toc->size)
7446 continue;
7447
7448 /* For the toc section, we only mark as used if
7449 this entry itself isn't unused. */
7450 if (sec == toc
7451 && !used[val >> 3]
7452 && (used[rel->r_offset >> 3]
7453 || !skip[rel->r_offset >> 3]))
7454 /* Do all the relocs again, to catch reference
7455 chains. */
7456 repeat = 1;
7457
7458 used[val >> 3] = 1;
7459 }
7460 while (repeat);
7461 }
7462
7463 /* Merge the used and skip arrays. Assume that TOC
7464 doublewords not appearing as either used or unused belong
7465 to to an entry more than one doubleword in size. */
7466 for (drop = skip, keep = used, last = 0, some_unused = 0;
7467 drop < skip + (toc->size + 7) / 8;
7468 ++drop, ++keep)
7469 {
7470 if (*keep)
7471 {
7472 *drop = 0;
7473 last = 0;
7474 }
7475 else if (*drop)
7476 {
7477 some_unused = 1;
7478 last = 1;
7479 }
7480 else
7481 *drop = last;
7482 }
7483
7484 free (used);
7485
7486 if (some_unused)
7487 {
7488 bfd_byte *contents, *src;
7489 unsigned long off;
7490
7491 /* Shuffle the toc contents, and at the same time convert the
7492 skip array from booleans into offsets. */
7493 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7494 goto error_ret;
7495
7496 elf_section_data (toc)->this_hdr.contents = contents;
7497
7498 for (src = contents, off = 0, drop = skip;
7499 src < contents + toc->size;
7500 src += 8, ++drop)
7501 {
7502 if (*drop)
7503 {
7504 *drop = (unsigned long) -1;
7505 off += 8;
7506 }
7507 else if (off != 0)
7508 {
7509 *drop = off;
7510 memcpy (src - off, src, 8);
7511 }
7512 }
7513 toc->rawsize = toc->size;
7514 toc->size = src - contents - off;
7515
7516 if (toc->reloc_count != 0)
7517 {
7518 Elf_Internal_Rela *wrel;
7519 bfd_size_type sz;
7520
7521 /* Read toc relocs. */
7522 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7523 TRUE);
7524 if (relstart == NULL)
7525 goto error_ret;
7526
7527 /* Remove unused toc relocs, and adjust those we keep. */
7528 wrel = relstart;
7529 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7530 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7531 {
7532 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7533 wrel->r_info = rel->r_info;
7534 wrel->r_addend = rel->r_addend;
7535 ++wrel;
7536 }
7537 else if (!dec_dynrel_count (rel->r_info, toc, info,
7538 &local_syms, NULL, NULL))
7539 goto error_ret;
7540
7541 toc->reloc_count = wrel - relstart;
7542 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7543 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7544 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7545 }
7546
7547 /* Adjust addends for relocs against the toc section sym. */
7548 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7549 {
7550 if (sec->reloc_count == 0
7551 || elf_discarded_section (sec))
7552 continue;
7553
7554 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7555 TRUE);
7556 if (relstart == NULL)
7557 goto error_ret;
7558
7559 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7560 {
7561 enum elf_ppc64_reloc_type r_type;
7562 unsigned long r_symndx;
7563 asection *sym_sec;
7564 struct elf_link_hash_entry *h;
7565 Elf_Internal_Sym *sym;
7566
7567 r_type = ELF64_R_TYPE (rel->r_info);
7568 switch (r_type)
7569 {
7570 default:
7571 continue;
7572
7573 case R_PPC64_TOC16:
7574 case R_PPC64_TOC16_LO:
7575 case R_PPC64_TOC16_HI:
7576 case R_PPC64_TOC16_HA:
7577 case R_PPC64_TOC16_DS:
7578 case R_PPC64_TOC16_LO_DS:
7579 case R_PPC64_ADDR64:
7580 break;
7581 }
7582
7583 r_symndx = ELF64_R_SYM (rel->r_info);
7584 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7585 r_symndx, ibfd))
7586 goto error_ret;
7587
7588 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7589 continue;
7590
7591 rel->r_addend -= skip[rel->r_addend >> 3];
7592 }
7593 }
7594
7595 /* We shouldn't have local or global symbols defined in the TOC,
7596 but handle them anyway. */
7597 if (local_syms != NULL)
7598 {
7599 Elf_Internal_Sym *sym;
7600
7601 for (sym = local_syms;
7602 sym < local_syms + symtab_hdr->sh_info;
7603 ++sym)
7604 if (sym->st_shndx != SHN_UNDEF
7605 && (sym->st_shndx < SHN_LORESERVE
7606 || sym->st_shndx > SHN_HIRESERVE)
7607 && sym->st_value != 0
7608 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7609 {
7610 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7611 sym->st_value -= skip[sym->st_value >> 3];
7612 else
7613 {
7614 (*_bfd_error_handler)
7615 (_("%s defined in removed toc entry"),
7616 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7617 NULL));
7618 sym->st_value = 0;
7619 sym->st_shndx = SHN_ABS;
7620 }
7621 symtab_hdr->contents = (unsigned char *) local_syms;
7622 }
7623 }
7624
7625 /* Finally, adjust any global syms defined in the toc. */
7626 if (toc_inf.global_toc_syms)
7627 {
7628 toc_inf.toc = toc;
7629 toc_inf.skip = skip;
7630 toc_inf.global_toc_syms = FALSE;
7631 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7632 &toc_inf);
7633 }
7634 }
7635
7636 if (local_syms != NULL
7637 && symtab_hdr->contents != (unsigned char *) local_syms)
7638 {
7639 if (!info->keep_memory)
7640 free (local_syms);
7641 else
7642 symtab_hdr->contents = (unsigned char *) local_syms;
7643 }
7644 free (skip);
7645 }
7646
7647 return TRUE;
7648 }
7649
7650 /* Allocate space in .plt, .got and associated reloc sections for
7651 dynamic relocs. */
7652
7653 static bfd_boolean
7654 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7655 {
7656 struct bfd_link_info *info;
7657 struct ppc_link_hash_table *htab;
7658 asection *s;
7659 struct ppc_link_hash_entry *eh;
7660 struct ppc_dyn_relocs *p;
7661 struct got_entry *gent;
7662
7663 if (h->root.type == bfd_link_hash_indirect)
7664 return TRUE;
7665
7666 if (h->root.type == bfd_link_hash_warning)
7667 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7668
7669 info = (struct bfd_link_info *) inf;
7670 htab = ppc_hash_table (info);
7671
7672 if (htab->elf.dynamic_sections_created
7673 && h->dynindx != -1
7674 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7675 {
7676 struct plt_entry *pent;
7677 bfd_boolean doneone = FALSE;
7678 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7679 if (pent->plt.refcount > 0)
7680 {
7681 /* If this is the first .plt entry, make room for the special
7682 first entry. */
7683 s = htab->plt;
7684 if (s->size == 0)
7685 s->size += PLT_INITIAL_ENTRY_SIZE;
7686
7687 pent->plt.offset = s->size;
7688
7689 /* Make room for this entry. */
7690 s->size += PLT_ENTRY_SIZE;
7691
7692 /* Make room for the .glink code. */
7693 s = htab->glink;
7694 if (s->size == 0)
7695 s->size += GLINK_CALL_STUB_SIZE;
7696 /* We need bigger stubs past index 32767. */
7697 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7698 s->size += 4;
7699 s->size += 2*4;
7700
7701 /* We also need to make an entry in the .rela.plt section. */
7702 s = htab->relplt;
7703 s->size += sizeof (Elf64_External_Rela);
7704 doneone = TRUE;
7705 }
7706 else
7707 pent->plt.offset = (bfd_vma) -1;
7708 if (!doneone)
7709 {
7710 h->plt.plist = NULL;
7711 h->needs_plt = 0;
7712 }
7713 }
7714 else
7715 {
7716 h->plt.plist = NULL;
7717 h->needs_plt = 0;
7718 }
7719
7720 eh = (struct ppc_link_hash_entry *) h;
7721 /* Run through the TLS GD got entries first if we're changing them
7722 to TPREL. */
7723 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7724 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7725 if (gent->got.refcount > 0
7726 && (gent->tls_type & TLS_GD) != 0)
7727 {
7728 /* This was a GD entry that has been converted to TPREL. If
7729 there happens to be a TPREL entry we can use that one. */
7730 struct got_entry *ent;
7731 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7732 if (ent->got.refcount > 0
7733 && (ent->tls_type & TLS_TPREL) != 0
7734 && ent->addend == gent->addend
7735 && ent->owner == gent->owner)
7736 {
7737 gent->got.refcount = 0;
7738 break;
7739 }
7740
7741 /* If not, then we'll be using our own TPREL entry. */
7742 if (gent->got.refcount != 0)
7743 gent->tls_type = TLS_TLS | TLS_TPREL;
7744 }
7745
7746 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7747 if (gent->got.refcount > 0)
7748 {
7749 bfd_boolean dyn;
7750
7751 /* Make sure this symbol is output as a dynamic symbol.
7752 Undefined weak syms won't yet be marked as dynamic,
7753 nor will all TLS symbols. */
7754 if (h->dynindx == -1
7755 && !h->forced_local)
7756 {
7757 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7758 return FALSE;
7759 }
7760
7761 if ((gent->tls_type & TLS_LD) != 0
7762 && !h->def_dynamic)
7763 {
7764 ppc64_tlsld_got (gent->owner)->refcount += 1;
7765 gent->got.offset = (bfd_vma) -1;
7766 continue;
7767 }
7768
7769 s = ppc64_elf_tdata (gent->owner)->got;
7770 gent->got.offset = s->size;
7771 s->size
7772 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7773 dyn = htab->elf.dynamic_sections_created;
7774 if ((info->shared
7775 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7776 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7777 || h->root.type != bfd_link_hash_undefweak))
7778 ppc64_elf_tdata (gent->owner)->relgot->size
7779 += (gent->tls_type & eh->tls_mask & TLS_GD
7780 ? 2 * sizeof (Elf64_External_Rela)
7781 : sizeof (Elf64_External_Rela));
7782 }
7783 else
7784 gent->got.offset = (bfd_vma) -1;
7785
7786 if (eh->dyn_relocs == NULL)
7787 return TRUE;
7788
7789 /* In the shared -Bsymbolic case, discard space allocated for
7790 dynamic pc-relative relocs against symbols which turn out to be
7791 defined in regular objects. For the normal shared case, discard
7792 space for relocs that have become local due to symbol visibility
7793 changes. */
7794
7795 if (info->shared)
7796 {
7797 /* Relocs that use pc_count are those that appear on a call insn,
7798 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7799 generated via assembly. We want calls to protected symbols to
7800 resolve directly to the function rather than going via the plt.
7801 If people want function pointer comparisons to work as expected
7802 then they should avoid writing weird assembly. */
7803 if (SYMBOL_CALLS_LOCAL (info, h))
7804 {
7805 struct ppc_dyn_relocs **pp;
7806
7807 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7808 {
7809 p->count -= p->pc_count;
7810 p->pc_count = 0;
7811 if (p->count == 0)
7812 *pp = p->next;
7813 else
7814 pp = &p->next;
7815 }
7816 }
7817
7818 /* Also discard relocs on undefined weak syms with non-default
7819 visibility. */
7820 if (eh->dyn_relocs != NULL
7821 && h->root.type == bfd_link_hash_undefweak)
7822 {
7823 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7824 eh->dyn_relocs = NULL;
7825
7826 /* Make sure this symbol is output as a dynamic symbol.
7827 Undefined weak syms won't yet be marked as dynamic. */
7828 else if (h->dynindx == -1
7829 && !h->forced_local)
7830 {
7831 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7832 return FALSE;
7833 }
7834 }
7835 }
7836 else if (ELIMINATE_COPY_RELOCS)
7837 {
7838 /* For the non-shared case, discard space for relocs against
7839 symbols which turn out to need copy relocs or are not
7840 dynamic. */
7841
7842 if (!h->non_got_ref
7843 && h->def_dynamic
7844 && !h->def_regular)
7845 {
7846 /* Make sure this symbol is output as a dynamic symbol.
7847 Undefined weak syms won't yet be marked as dynamic. */
7848 if (h->dynindx == -1
7849 && !h->forced_local)
7850 {
7851 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7852 return FALSE;
7853 }
7854
7855 /* If that succeeded, we know we'll be keeping all the
7856 relocs. */
7857 if (h->dynindx != -1)
7858 goto keep;
7859 }
7860
7861 eh->dyn_relocs = NULL;
7862
7863 keep: ;
7864 }
7865
7866 /* Finally, allocate space. */
7867 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7868 {
7869 asection *sreloc = elf_section_data (p->sec)->sreloc;
7870 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7871 }
7872
7873 return TRUE;
7874 }
7875
7876 /* Find any dynamic relocs that apply to read-only sections. */
7877
7878 static bfd_boolean
7879 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7880 {
7881 struct ppc_link_hash_entry *eh;
7882 struct ppc_dyn_relocs *p;
7883
7884 if (h->root.type == bfd_link_hash_warning)
7885 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7886
7887 eh = (struct ppc_link_hash_entry *) h;
7888 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7889 {
7890 asection *s = p->sec->output_section;
7891
7892 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7893 {
7894 struct bfd_link_info *info = inf;
7895
7896 info->flags |= DF_TEXTREL;
7897
7898 /* Not an error, just cut short the traversal. */
7899 return FALSE;
7900 }
7901 }
7902 return TRUE;
7903 }
7904
7905 /* Set the sizes of the dynamic sections. */
7906
7907 static bfd_boolean
7908 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7909 struct bfd_link_info *info)
7910 {
7911 struct ppc_link_hash_table *htab;
7912 bfd *dynobj;
7913 asection *s;
7914 bfd_boolean relocs;
7915 bfd *ibfd;
7916
7917 htab = ppc_hash_table (info);
7918 dynobj = htab->elf.dynobj;
7919 if (dynobj == NULL)
7920 abort ();
7921
7922 if (htab->elf.dynamic_sections_created)
7923 {
7924 /* Set the contents of the .interp section to the interpreter. */
7925 if (info->executable)
7926 {
7927 s = bfd_get_section_by_name (dynobj, ".interp");
7928 if (s == NULL)
7929 abort ();
7930 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7931 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7932 }
7933 }
7934
7935 /* Set up .got offsets for local syms, and space for local dynamic
7936 relocs. */
7937 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7938 {
7939 struct got_entry **lgot_ents;
7940 struct got_entry **end_lgot_ents;
7941 char *lgot_masks;
7942 bfd_size_type locsymcount;
7943 Elf_Internal_Shdr *symtab_hdr;
7944 asection *srel;
7945
7946 if (!is_ppc64_elf_target (ibfd->xvec))
7947 continue;
7948
7949 for (s = ibfd->sections; s != NULL; s = s->next)
7950 {
7951 struct ppc_dyn_relocs *p;
7952
7953 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7954 {
7955 if (!bfd_is_abs_section (p->sec)
7956 && bfd_is_abs_section (p->sec->output_section))
7957 {
7958 /* Input section has been discarded, either because
7959 it is a copy of a linkonce section or due to
7960 linker script /DISCARD/, so we'll be discarding
7961 the relocs too. */
7962 }
7963 else if (p->count != 0)
7964 {
7965 srel = elf_section_data (p->sec)->sreloc;
7966 srel->size += p->count * sizeof (Elf64_External_Rela);
7967 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7968 info->flags |= DF_TEXTREL;
7969 }
7970 }
7971 }
7972
7973 lgot_ents = elf_local_got_ents (ibfd);
7974 if (!lgot_ents)
7975 continue;
7976
7977 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7978 locsymcount = symtab_hdr->sh_info;
7979 end_lgot_ents = lgot_ents + locsymcount;
7980 lgot_masks = (char *) end_lgot_ents;
7981 s = ppc64_elf_tdata (ibfd)->got;
7982 srel = ppc64_elf_tdata (ibfd)->relgot;
7983 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7984 {
7985 struct got_entry *ent;
7986
7987 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7988 if (ent->got.refcount > 0)
7989 {
7990 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7991 {
7992 ppc64_tlsld_got (ibfd)->refcount += 1;
7993 ent->got.offset = (bfd_vma) -1;
7994 }
7995 else
7996 {
7997 ent->got.offset = s->size;
7998 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7999 {
8000 s->size += 16;
8001 if (info->shared)
8002 srel->size += 2 * sizeof (Elf64_External_Rela);
8003 }
8004 else
8005 {
8006 s->size += 8;
8007 if (info->shared)
8008 srel->size += sizeof (Elf64_External_Rela);
8009 }
8010 }
8011 }
8012 else
8013 ent->got.offset = (bfd_vma) -1;
8014 }
8015 }
8016
8017 /* Allocate global sym .plt and .got entries, and space for global
8018 sym dynamic relocs. */
8019 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8020
8021 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8022 {
8023 if (!is_ppc64_elf_target (ibfd->xvec))
8024 continue;
8025
8026 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8027 {
8028 s = ppc64_elf_tdata (ibfd)->got;
8029 ppc64_tlsld_got (ibfd)->offset = s->size;
8030 s->size += 16;
8031 if (info->shared)
8032 {
8033 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8034 srel->size += sizeof (Elf64_External_Rela);
8035 }
8036 }
8037 else
8038 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8039 }
8040
8041 /* We now have determined the sizes of the various dynamic sections.
8042 Allocate memory for them. */
8043 relocs = FALSE;
8044 for (s = dynobj->sections; s != NULL; s = s->next)
8045 {
8046 if ((s->flags & SEC_LINKER_CREATED) == 0)
8047 continue;
8048
8049 if (s == htab->brlt || s == htab->relbrlt)
8050 /* These haven't been allocated yet; don't strip. */
8051 continue;
8052 else if (s == htab->got
8053 || s == htab->plt
8054 || s == htab->glink
8055 || s == htab->dynbss)
8056 {
8057 /* Strip this section if we don't need it; see the
8058 comment below. */
8059 }
8060 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8061 {
8062 if (s->size != 0)
8063 {
8064 if (s != htab->relplt)
8065 relocs = TRUE;
8066
8067 /* We use the reloc_count field as a counter if we need
8068 to copy relocs into the output file. */
8069 s->reloc_count = 0;
8070 }
8071 }
8072 else
8073 {
8074 /* It's not one of our sections, so don't allocate space. */
8075 continue;
8076 }
8077
8078 if (s->size == 0)
8079 {
8080 /* If we don't need this section, strip it from the
8081 output file. This is mostly to handle .rela.bss and
8082 .rela.plt. We must create both sections in
8083 create_dynamic_sections, because they must be created
8084 before the linker maps input sections to output
8085 sections. The linker does that before
8086 adjust_dynamic_symbol is called, and it is that
8087 function which decides whether anything needs to go
8088 into these sections. */
8089 s->flags |= SEC_EXCLUDE;
8090 continue;
8091 }
8092
8093 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8094 continue;
8095
8096 /* Allocate memory for the section contents. We use bfd_zalloc
8097 here in case unused entries are not reclaimed before the
8098 section's contents are written out. This should not happen,
8099 but this way if it does we get a R_PPC64_NONE reloc in .rela
8100 sections instead of garbage.
8101 We also rely on the section contents being zero when writing
8102 the GOT. */
8103 s->contents = bfd_zalloc (dynobj, s->size);
8104 if (s->contents == NULL)
8105 return FALSE;
8106 }
8107
8108 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8109 {
8110 if (!is_ppc64_elf_target (ibfd->xvec))
8111 continue;
8112
8113 s = ppc64_elf_tdata (ibfd)->got;
8114 if (s != NULL && s != htab->got)
8115 {
8116 if (s->size == 0)
8117 s->flags |= SEC_EXCLUDE;
8118 else
8119 {
8120 s->contents = bfd_zalloc (ibfd, s->size);
8121 if (s->contents == NULL)
8122 return FALSE;
8123 }
8124 }
8125 s = ppc64_elf_tdata (ibfd)->relgot;
8126 if (s != NULL)
8127 {
8128 if (s->size == 0)
8129 s->flags |= SEC_EXCLUDE;
8130 else
8131 {
8132 s->contents = bfd_zalloc (ibfd, s->size);
8133 if (s->contents == NULL)
8134 return FALSE;
8135 relocs = TRUE;
8136 s->reloc_count = 0;
8137 }
8138 }
8139 }
8140
8141 if (htab->elf.dynamic_sections_created)
8142 {
8143 /* Add some entries to the .dynamic section. We fill in the
8144 values later, in ppc64_elf_finish_dynamic_sections, but we
8145 must add the entries now so that we get the correct size for
8146 the .dynamic section. The DT_DEBUG entry is filled in by the
8147 dynamic linker and used by the debugger. */
8148 #define add_dynamic_entry(TAG, VAL) \
8149 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8150
8151 if (info->executable)
8152 {
8153 if (!add_dynamic_entry (DT_DEBUG, 0))
8154 return FALSE;
8155 }
8156
8157 if (htab->plt != NULL && htab->plt->size != 0)
8158 {
8159 if (!add_dynamic_entry (DT_PLTGOT, 0)
8160 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8161 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8162 || !add_dynamic_entry (DT_JMPREL, 0)
8163 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8164 return FALSE;
8165 }
8166
8167 if (NO_OPD_RELOCS)
8168 {
8169 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8170 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8171 return FALSE;
8172 }
8173
8174 if (relocs)
8175 {
8176 if (!add_dynamic_entry (DT_RELA, 0)
8177 || !add_dynamic_entry (DT_RELASZ, 0)
8178 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8179 return FALSE;
8180
8181 /* If any dynamic relocs apply to a read-only section,
8182 then we need a DT_TEXTREL entry. */
8183 if ((info->flags & DF_TEXTREL) == 0)
8184 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8185
8186 if ((info->flags & DF_TEXTREL) != 0)
8187 {
8188 if (!add_dynamic_entry (DT_TEXTREL, 0))
8189 return FALSE;
8190 }
8191 }
8192 }
8193 #undef add_dynamic_entry
8194
8195 return TRUE;
8196 }
8197
8198 /* Determine the type of stub needed, if any, for a call. */
8199
8200 static inline enum ppc_stub_type
8201 ppc_type_of_stub (asection *input_sec,
8202 const Elf_Internal_Rela *rel,
8203 struct ppc_link_hash_entry **hash,
8204 bfd_vma destination)
8205 {
8206 struct ppc_link_hash_entry *h = *hash;
8207 bfd_vma location;
8208 bfd_vma branch_offset;
8209 bfd_vma max_branch_offset;
8210 enum elf_ppc64_reloc_type r_type;
8211
8212 if (h != NULL)
8213 {
8214 struct ppc_link_hash_entry *fdh = h;
8215 if (fdh->oh != NULL
8216 && fdh->oh->is_func_descriptor)
8217 fdh = fdh->oh;
8218
8219 if (fdh->elf.dynindx != -1)
8220 {
8221 struct plt_entry *ent;
8222
8223 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8224 if (ent->addend == rel->r_addend
8225 && ent->plt.offset != (bfd_vma) -1)
8226 {
8227 *hash = fdh;
8228 return ppc_stub_plt_call;
8229 }
8230 }
8231
8232 /* Here, we know we don't have a plt entry. If we don't have a
8233 either a defined function descriptor or a defined entry symbol
8234 in a regular object file, then it is pointless trying to make
8235 any other type of stub. */
8236 if (!((fdh->elf.root.type == bfd_link_hash_defined
8237 || fdh->elf.root.type == bfd_link_hash_defweak)
8238 && fdh->elf.root.u.def.section->output_section != NULL)
8239 && !((h->elf.root.type == bfd_link_hash_defined
8240 || h->elf.root.type == bfd_link_hash_defweak)
8241 && h->elf.root.u.def.section->output_section != NULL))
8242 return ppc_stub_none;
8243 }
8244
8245 /* Determine where the call point is. */
8246 location = (input_sec->output_offset
8247 + input_sec->output_section->vma
8248 + rel->r_offset);
8249
8250 branch_offset = destination - location;
8251 r_type = ELF64_R_TYPE (rel->r_info);
8252
8253 /* Determine if a long branch stub is needed. */
8254 max_branch_offset = 1 << 25;
8255 if (r_type != R_PPC64_REL24)
8256 max_branch_offset = 1 << 15;
8257
8258 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8259 /* We need a stub. Figure out whether a long_branch or plt_branch
8260 is needed later. */
8261 return ppc_stub_long_branch;
8262
8263 return ppc_stub_none;
8264 }
8265
8266 /* Build a .plt call stub. */
8267
8268 static inline bfd_byte *
8269 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8270 {
8271 #define PPC_LO(v) ((v) & 0xffff)
8272 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8273 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8274
8275 if (PPC_HA (offset) != 0)
8276 {
8277 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8278 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8279 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8280 if (PPC_HA (offset + 16) != PPC_HA (offset))
8281 {
8282 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8283 offset = 0;
8284 }
8285 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8286 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8287 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8288 bfd_put_32 (obfd, BCTR, p), p += 4;
8289 }
8290 else
8291 {
8292 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8293 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8294 if (PPC_HA (offset + 16) != PPC_HA (offset))
8295 {
8296 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8297 offset = 0;
8298 }
8299 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8300 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8301 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8302 bfd_put_32 (obfd, BCTR, p), p += 4;
8303 }
8304 return p;
8305 }
8306
8307 static bfd_boolean
8308 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8309 {
8310 struct ppc_stub_hash_entry *stub_entry;
8311 struct ppc_branch_hash_entry *br_entry;
8312 struct bfd_link_info *info;
8313 struct ppc_link_hash_table *htab;
8314 bfd_byte *loc;
8315 bfd_byte *p;
8316 unsigned int indx;
8317 struct plt_entry *ent;
8318 bfd_vma dest, off;
8319 int size;
8320
8321 /* Massage our args to the form they really have. */
8322 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8323 info = in_arg;
8324
8325 htab = ppc_hash_table (info);
8326
8327 /* Make a note of the offset within the stubs for this entry. */
8328 stub_entry->stub_offset = stub_entry->stub_sec->size;
8329 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8330
8331 htab->stub_count[stub_entry->stub_type - 1] += 1;
8332 switch (stub_entry->stub_type)
8333 {
8334 case ppc_stub_long_branch:
8335 case ppc_stub_long_branch_r2off:
8336 /* Branches are relative. This is where we are going to. */
8337 off = dest = (stub_entry->target_value
8338 + stub_entry->target_section->output_offset
8339 + stub_entry->target_section->output_section->vma);
8340
8341 /* And this is where we are coming from. */
8342 off -= (stub_entry->stub_offset
8343 + stub_entry->stub_sec->output_offset
8344 + stub_entry->stub_sec->output_section->vma);
8345
8346 size = 4;
8347 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8348 {
8349 bfd_vma r2off;
8350
8351 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8352 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8353 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8354 loc += 4;
8355 size = 12;
8356 if (PPC_HA (r2off) != 0)
8357 {
8358 size = 16;
8359 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8360 loc += 4;
8361 }
8362 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8363 loc += 4;
8364 off -= size - 4;
8365 }
8366 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8367
8368 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8369 {
8370 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8371 stub_entry->root.string);
8372 htab->stub_error = TRUE;
8373 return FALSE;
8374 }
8375
8376 if (info->emitrelocations)
8377 {
8378 Elf_Internal_Rela *relocs, *r;
8379 struct bfd_elf_section_data *elfsec_data;
8380
8381 elfsec_data = elf_section_data (stub_entry->stub_sec);
8382 relocs = elfsec_data->relocs;
8383 if (relocs == NULL)
8384 {
8385 bfd_size_type relsize;
8386 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8387 relocs = bfd_alloc (htab->stub_bfd, relsize);
8388 if (relocs == NULL)
8389 return FALSE;
8390 elfsec_data->relocs = relocs;
8391 elfsec_data->rel_hdr.sh_size = (stub_entry->stub_sec->reloc_count
8392 * sizeof (Elf64_External_Rela));
8393 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8394 stub_entry->stub_sec->reloc_count = 0;
8395 }
8396 r = relocs + stub_entry->stub_sec->reloc_count;
8397 stub_entry->stub_sec->reloc_count += 1;
8398 r->r_offset = loc - stub_entry->stub_sec->contents;
8399 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8400 r->r_addend = dest;
8401 if (stub_entry->h != NULL)
8402 {
8403 struct elf_link_hash_entry **hashes;
8404 unsigned long symndx;
8405 struct ppc_link_hash_entry *h;
8406
8407 hashes = elf_sym_hashes (htab->stub_bfd);
8408 if (hashes == NULL)
8409 {
8410 bfd_size_type hsize;
8411
8412 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8413 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8414 if (hashes == NULL)
8415 return FALSE;
8416 elf_sym_hashes (htab->stub_bfd) = hashes;
8417 htab->stub_globals = 1;
8418 }
8419 symndx = htab->stub_globals++;
8420 h = stub_entry->h;
8421 hashes[symndx] = &h->elf;
8422 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8423 if (h->oh != NULL && h->oh->is_func)
8424 h = h->oh;
8425 if (h->elf.root.u.def.section != stub_entry->target_section)
8426 /* H is an opd symbol. The addend must be zero. */
8427 r->r_addend = 0;
8428 else
8429 {
8430 off = (h->elf.root.u.def.value
8431 + h->elf.root.u.def.section->output_offset
8432 + h->elf.root.u.def.section->output_section->vma);
8433 r->r_addend -= off;
8434 }
8435 }
8436 }
8437 break;
8438
8439 case ppc_stub_plt_branch:
8440 case ppc_stub_plt_branch_r2off:
8441 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8442 stub_entry->root.string + 9,
8443 FALSE, FALSE);
8444 if (br_entry == NULL)
8445 {
8446 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8447 stub_entry->root.string);
8448 htab->stub_error = TRUE;
8449 return FALSE;
8450 }
8451
8452 off = (stub_entry->target_value
8453 + stub_entry->target_section->output_offset
8454 + stub_entry->target_section->output_section->vma);
8455
8456 bfd_put_64 (htab->brlt->owner, off,
8457 htab->brlt->contents + br_entry->offset);
8458
8459 if (br_entry->iter == htab->stub_iteration)
8460 {
8461 br_entry->iter = 0;
8462
8463 if (htab->relbrlt != NULL)
8464 {
8465 /* Create a reloc for the branch lookup table entry. */
8466 Elf_Internal_Rela rela;
8467 bfd_byte *rl;
8468
8469 rela.r_offset = (br_entry->offset
8470 + htab->brlt->output_offset
8471 + htab->brlt->output_section->vma);
8472 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8473 rela.r_addend = off;
8474
8475 rl = htab->relbrlt->contents;
8476 rl += (htab->relbrlt->reloc_count++
8477 * sizeof (Elf64_External_Rela));
8478 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8479 }
8480 else if (info->emitrelocations)
8481 {
8482 Elf_Internal_Rela *relocs, *r;
8483 struct bfd_elf_section_data *elfsec_data;
8484
8485 elfsec_data = elf_section_data (htab->brlt);
8486 relocs = elfsec_data->relocs;
8487 if (relocs == NULL)
8488 {
8489 bfd_size_type relsize;
8490 relsize = htab->brlt->reloc_count * sizeof (*relocs);
8491 relocs = bfd_alloc (htab->brlt->owner, relsize);
8492 if (relocs == NULL)
8493 return FALSE;
8494 elfsec_data->relocs = relocs;
8495 elfsec_data->rel_hdr.sh_size
8496 = (stub_entry->stub_sec->reloc_count
8497 * sizeof (Elf64_External_Rela));
8498 elfsec_data->rel_hdr.sh_entsize
8499 = sizeof (Elf64_External_Rela);
8500 htab->brlt->reloc_count = 0;
8501 }
8502 r = relocs + htab->brlt->reloc_count;
8503 htab->brlt->reloc_count += 1;
8504 r->r_offset = (br_entry->offset
8505 + htab->brlt->output_offset
8506 + htab->brlt->output_section->vma);
8507 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8508 r->r_addend = off;
8509 }
8510 }
8511
8512 off = (br_entry->offset
8513 + htab->brlt->output_offset
8514 + htab->brlt->output_section->vma
8515 - elf_gp (htab->brlt->output_section->owner)
8516 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8517
8518 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8519 {
8520 (*_bfd_error_handler)
8521 (_("linkage table error against `%s'"),
8522 stub_entry->root.string);
8523 bfd_set_error (bfd_error_bad_value);
8524 htab->stub_error = TRUE;
8525 return FALSE;
8526 }
8527
8528 indx = off;
8529 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8530 {
8531 if (PPC_HA (indx) != 0)
8532 {
8533 size = 16;
8534 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8535 loc += 4;
8536 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8537 }
8538 else
8539 {
8540 size = 12;
8541 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8542 }
8543 }
8544 else
8545 {
8546 bfd_vma r2off;
8547
8548 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8549 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8550 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8551 loc += 4;
8552 size = 20;
8553 if (PPC_HA (indx) != 0)
8554 {
8555 size += 4;
8556 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8557 loc += 4;
8558 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8559 loc += 4;
8560 }
8561 else
8562 {
8563 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8564 loc += 4;
8565 }
8566
8567 if (PPC_HA (r2off) != 0)
8568 {
8569 size += 4;
8570 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8571 loc += 4;
8572 }
8573 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8574 }
8575 loc += 4;
8576 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8577 loc += 4;
8578 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8579 break;
8580
8581 case ppc_stub_plt_call:
8582 /* Do the best we can for shared libraries built without
8583 exporting ".foo" for each "foo". This can happen when symbol
8584 versioning scripts strip all bar a subset of symbols. */
8585 if (stub_entry->h->oh != NULL
8586 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8587 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8588 {
8589 /* Point the symbol at the stub. There may be multiple stubs,
8590 we don't really care; The main thing is to make this sym
8591 defined somewhere. Maybe defining the symbol in the stub
8592 section is a silly idea. If we didn't do this, htab->top_id
8593 could disappear. */
8594 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8595 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8596 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8597 }
8598
8599 /* Now build the stub. */
8600 off = (bfd_vma) -1;
8601 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8602 if (ent->addend == stub_entry->addend)
8603 {
8604 off = ent->plt.offset;
8605 break;
8606 }
8607 if (off >= (bfd_vma) -2)
8608 abort ();
8609
8610 off &= ~ (bfd_vma) 1;
8611 off += (htab->plt->output_offset
8612 + htab->plt->output_section->vma
8613 - elf_gp (htab->plt->output_section->owner)
8614 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8615
8616 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8617 {
8618 (*_bfd_error_handler)
8619 (_("linkage table error against `%s'"),
8620 stub_entry->h->elf.root.root.string);
8621 bfd_set_error (bfd_error_bad_value);
8622 htab->stub_error = TRUE;
8623 return FALSE;
8624 }
8625
8626 p = build_plt_stub (htab->stub_bfd, loc, off);
8627 size = p - loc;
8628 break;
8629
8630 default:
8631 BFD_FAIL ();
8632 return FALSE;
8633 }
8634
8635 stub_entry->stub_sec->size += size;
8636
8637 if (htab->emit_stub_syms)
8638 {
8639 struct elf_link_hash_entry *h;
8640 size_t len1, len2;
8641 char *name;
8642 const char *const stub_str[] = { "long_branch",
8643 "long_branch_r2off",
8644 "plt_branch",
8645 "plt_branch_r2off",
8646 "plt_call" };
8647
8648 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8649 len2 = strlen (stub_entry->root.string);
8650 name = bfd_malloc (len1 + len2 + 2);
8651 if (name == NULL)
8652 return FALSE;
8653 memcpy (name, stub_entry->root.string, 9);
8654 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8655 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8656 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8657 if (h == NULL)
8658 return FALSE;
8659 if (h->root.type == bfd_link_hash_new)
8660 {
8661 h->root.type = bfd_link_hash_defined;
8662 h->root.u.def.section = stub_entry->stub_sec;
8663 h->root.u.def.value = stub_entry->stub_offset;
8664 h->ref_regular = 1;
8665 h->def_regular = 1;
8666 h->ref_regular_nonweak = 1;
8667 h->forced_local = 1;
8668 h->non_elf = 0;
8669 }
8670 }
8671
8672 return TRUE;
8673 }
8674
8675 /* As above, but don't actually build the stub. Just bump offset so
8676 we know stub section sizes, and select plt_branch stubs where
8677 long_branch stubs won't do. */
8678
8679 static bfd_boolean
8680 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8681 {
8682 struct ppc_stub_hash_entry *stub_entry;
8683 struct bfd_link_info *info;
8684 struct ppc_link_hash_table *htab;
8685 bfd_vma off;
8686 int size;
8687
8688 /* Massage our args to the form they really have. */
8689 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8690 info = in_arg;
8691
8692 htab = ppc_hash_table (info);
8693
8694 if (stub_entry->stub_type == ppc_stub_plt_call)
8695 {
8696 struct plt_entry *ent;
8697 off = (bfd_vma) -1;
8698 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8699 if (ent->addend == stub_entry->addend)
8700 {
8701 off = ent->plt.offset & ~(bfd_vma) 1;
8702 break;
8703 }
8704 if (off >= (bfd_vma) -2)
8705 abort ();
8706 off += (htab->plt->output_offset
8707 + htab->plt->output_section->vma
8708 - elf_gp (htab->plt->output_section->owner)
8709 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8710
8711 size = PLT_CALL_STUB_SIZE;
8712 if (PPC_HA (off) == 0)
8713 size -= 4;
8714 if (PPC_HA (off + 16) != PPC_HA (off))
8715 size += 4;
8716 }
8717 else
8718 {
8719 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8720 variants. */
8721 bfd_vma r2off = 0;
8722
8723 off = (stub_entry->target_value
8724 + stub_entry->target_section->output_offset
8725 + stub_entry->target_section->output_section->vma);
8726 off -= (stub_entry->stub_sec->size
8727 + stub_entry->stub_sec->output_offset
8728 + stub_entry->stub_sec->output_section->vma);
8729
8730 /* Reset the stub type from the plt variant in case we now
8731 can reach with a shorter stub. */
8732 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8733 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8734
8735 size = 4;
8736 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8737 {
8738 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8739 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8740 size = 12;
8741 if (PPC_HA (r2off) != 0)
8742 size = 16;
8743 off -= size - 4;
8744 }
8745
8746 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8747 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8748 {
8749 struct ppc_branch_hash_entry *br_entry;
8750 unsigned int indx;
8751
8752 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8753 stub_entry->root.string + 9,
8754 TRUE, FALSE);
8755 if (br_entry == NULL)
8756 {
8757 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8758 stub_entry->root.string);
8759 htab->stub_error = TRUE;
8760 return FALSE;
8761 }
8762
8763 if (br_entry->iter != htab->stub_iteration)
8764 {
8765 br_entry->iter = htab->stub_iteration;
8766 br_entry->offset = htab->brlt->size;
8767 htab->brlt->size += 8;
8768
8769 if (htab->relbrlt != NULL)
8770 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8771 else if (info->emitrelocations)
8772 {
8773 htab->brlt->reloc_count += 1;
8774 htab->brlt->flags |= SEC_RELOC;
8775 }
8776 }
8777
8778 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8779 off = (br_entry->offset
8780 + htab->brlt->output_offset
8781 + htab->brlt->output_section->vma
8782 - elf_gp (htab->brlt->output_section->owner)
8783 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8784
8785 indx = off;
8786 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8787 {
8788 size = 12;
8789 if (PPC_HA (indx) != 0)
8790 size = 16;
8791 }
8792 else
8793 {
8794 size = 20;
8795 if (PPC_HA (indx) != 0)
8796 size += 4;
8797
8798 if (PPC_HA (r2off) != 0)
8799 size += 4;
8800 }
8801 }
8802 else if (info->emitrelocations)
8803 {
8804 stub_entry->stub_sec->reloc_count += 1;
8805 stub_entry->stub_sec->flags |= SEC_RELOC;
8806 }
8807 }
8808
8809 stub_entry->stub_sec->size += size;
8810 return TRUE;
8811 }
8812
8813 /* Set up various things so that we can make a list of input sections
8814 for each output section included in the link. Returns -1 on error,
8815 0 when no stubs will be needed, and 1 on success. */
8816
8817 int
8818 ppc64_elf_setup_section_lists (bfd *output_bfd,
8819 struct bfd_link_info *info,
8820 int no_multi_toc)
8821 {
8822 bfd *input_bfd;
8823 int top_id, top_index, id;
8824 asection *section;
8825 asection **input_list;
8826 bfd_size_type amt;
8827 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8828
8829 htab->no_multi_toc = no_multi_toc;
8830
8831 if (htab->brlt == NULL)
8832 return 0;
8833
8834 /* Find the top input section id. */
8835 for (input_bfd = info->input_bfds, top_id = 3;
8836 input_bfd != NULL;
8837 input_bfd = input_bfd->link_next)
8838 {
8839 for (section = input_bfd->sections;
8840 section != NULL;
8841 section = section->next)
8842 {
8843 if (top_id < section->id)
8844 top_id = section->id;
8845 }
8846 }
8847
8848 htab->top_id = top_id;
8849 amt = sizeof (struct map_stub) * (top_id + 1);
8850 htab->stub_group = bfd_zmalloc (amt);
8851 if (htab->stub_group == NULL)
8852 return -1;
8853
8854 /* Set toc_off for com, und, abs and ind sections. */
8855 for (id = 0; id < 3; id++)
8856 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8857
8858 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8859
8860 /* We can't use output_bfd->section_count here to find the top output
8861 section index as some sections may have been removed, and
8862 strip_excluded_output_sections doesn't renumber the indices. */
8863 for (section = output_bfd->sections, top_index = 0;
8864 section != NULL;
8865 section = section->next)
8866 {
8867 if (top_index < section->index)
8868 top_index = section->index;
8869 }
8870
8871 htab->top_index = top_index;
8872 amt = sizeof (asection *) * (top_index + 1);
8873 input_list = bfd_zmalloc (amt);
8874 htab->input_list = input_list;
8875 if (input_list == NULL)
8876 return -1;
8877
8878 return 1;
8879 }
8880
8881 /* The linker repeatedly calls this function for each TOC input section
8882 and linker generated GOT section. Group input bfds such that the toc
8883 within a group is less than 64k in size. Will break with cute linker
8884 scripts that play games with dot in the output toc section. */
8885
8886 void
8887 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8888 {
8889 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8890
8891 if (!htab->no_multi_toc)
8892 {
8893 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8894 bfd_vma off = addr - htab->toc_curr;
8895
8896 if (off + isec->size > 0x10000)
8897 htab->toc_curr = addr;
8898
8899 elf_gp (isec->owner) = (htab->toc_curr
8900 - elf_gp (isec->output_section->owner)
8901 + TOC_BASE_OFF);
8902 }
8903 }
8904
8905 /* Called after the last call to the above function. */
8906
8907 void
8908 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8909 {
8910 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8911
8912 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8913
8914 /* toc_curr tracks the TOC offset used for code sections below in
8915 ppc64_elf_next_input_section. Start off at 0x8000. */
8916 htab->toc_curr = TOC_BASE_OFF;
8917 }
8918
8919 /* No toc references were found in ISEC. If the code in ISEC makes no
8920 calls, then there's no need to use toc adjusting stubs when branching
8921 into ISEC. Actually, indirect calls from ISEC are OK as they will
8922 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8923 needed, and 2 if a cyclical call-graph was found but no other reason
8924 for a stub was detected. If called from the top level, a return of
8925 2 means the same as a return of 0. */
8926
8927 static int
8928 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8929 {
8930 Elf_Internal_Rela *relstart, *rel;
8931 Elf_Internal_Sym *local_syms;
8932 int ret;
8933 struct ppc_link_hash_table *htab;
8934
8935 /* We know none of our code bearing sections will need toc stubs. */
8936 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8937 return 0;
8938
8939 if (isec->size == 0)
8940 return 0;
8941
8942 if (isec->output_section == NULL)
8943 return 0;
8944
8945 if (isec->reloc_count == 0)
8946 return 0;
8947
8948 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8949 info->keep_memory);
8950 if (relstart == NULL)
8951 return -1;
8952
8953 /* Look for branches to outside of this section. */
8954 local_syms = NULL;
8955 ret = 0;
8956 htab = ppc_hash_table (info);
8957 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8958 {
8959 enum elf_ppc64_reloc_type r_type;
8960 unsigned long r_symndx;
8961 struct elf_link_hash_entry *h;
8962 Elf_Internal_Sym *sym;
8963 asection *sym_sec;
8964 long *opd_adjust;
8965 bfd_vma sym_value;
8966 bfd_vma dest;
8967
8968 r_type = ELF64_R_TYPE (rel->r_info);
8969 if (r_type != R_PPC64_REL24
8970 && r_type != R_PPC64_REL14
8971 && r_type != R_PPC64_REL14_BRTAKEN
8972 && r_type != R_PPC64_REL14_BRNTAKEN)
8973 continue;
8974
8975 r_symndx = ELF64_R_SYM (rel->r_info);
8976 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8977 isec->owner))
8978 {
8979 ret = -1;
8980 break;
8981 }
8982
8983 /* Calls to dynamic lib functions go through a plt call stub
8984 that uses r2. Branches to undefined symbols might be a call
8985 using old-style dot symbols that can be satisfied by a plt
8986 call into a new-style dynamic library. */
8987 if (sym_sec == NULL)
8988 {
8989 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8990 if (eh != NULL
8991 && eh->oh != NULL
8992 && eh->oh->elf.plt.plist != NULL)
8993 {
8994 ret = 1;
8995 break;
8996 }
8997
8998 /* Ignore other undefined symbols. */
8999 continue;
9000 }
9001
9002 /* Assume branches to other sections not included in the link need
9003 stubs too, to cover -R and absolute syms. */
9004 if (sym_sec->output_section == NULL)
9005 {
9006 ret = 1;
9007 break;
9008 }
9009
9010 if (h == NULL)
9011 sym_value = sym->st_value;
9012 else
9013 {
9014 if (h->root.type != bfd_link_hash_defined
9015 && h->root.type != bfd_link_hash_defweak)
9016 abort ();
9017 sym_value = h->root.u.def.value;
9018 }
9019 sym_value += rel->r_addend;
9020
9021 /* If this branch reloc uses an opd sym, find the code section. */
9022 opd_adjust = get_opd_info (sym_sec);
9023 if (opd_adjust != NULL)
9024 {
9025 if (h == NULL)
9026 {
9027 long adjust;
9028
9029 adjust = opd_adjust[sym->st_value / 8];
9030 if (adjust == -1)
9031 /* Assume deleted functions won't ever be called. */
9032 continue;
9033 sym_value += adjust;
9034 }
9035
9036 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9037 if (dest == (bfd_vma) -1)
9038 continue;
9039 }
9040 else
9041 dest = (sym_value
9042 + sym_sec->output_offset
9043 + sym_sec->output_section->vma);
9044
9045 /* Ignore branch to self. */
9046 if (sym_sec == isec)
9047 continue;
9048
9049 /* If the called function uses the toc, we need a stub. */
9050 if (sym_sec->has_toc_reloc
9051 || sym_sec->makes_toc_func_call)
9052 {
9053 ret = 1;
9054 break;
9055 }
9056
9057 /* Assume any branch that needs a long branch stub might in fact
9058 need a plt_branch stub. A plt_branch stub uses r2. */
9059 else if (dest - (isec->output_offset
9060 + isec->output_section->vma
9061 + rel->r_offset) + (1 << 25) >= (2 << 25))
9062 {
9063 ret = 1;
9064 break;
9065 }
9066
9067 /* If calling back to a section in the process of being tested, we
9068 can't say for sure that no toc adjusting stubs are needed, so
9069 don't return zero. */
9070 else if (sym_sec->call_check_in_progress)
9071 ret = 2;
9072
9073 /* Branches to another section that itself doesn't have any TOC
9074 references are OK. Recursively call ourselves to check. */
9075 else if (sym_sec->id <= htab->top_id
9076 && htab->stub_group[sym_sec->id].toc_off == 0)
9077 {
9078 int recur;
9079
9080 /* Mark current section as indeterminate, so that other
9081 sections that call back to current won't be marked as
9082 known. */
9083 isec->call_check_in_progress = 1;
9084 recur = toc_adjusting_stub_needed (info, sym_sec);
9085 isec->call_check_in_progress = 0;
9086
9087 if (recur < 0)
9088 {
9089 /* An error. Exit. */
9090 ret = -1;
9091 break;
9092 }
9093 else if (recur <= 1)
9094 {
9095 /* Known result. Mark as checked and set section flag. */
9096 htab->stub_group[sym_sec->id].toc_off = 1;
9097 if (recur != 0)
9098 {
9099 sym_sec->makes_toc_func_call = 1;
9100 ret = 1;
9101 break;
9102 }
9103 }
9104 else
9105 {
9106 /* Unknown result. Continue checking. */
9107 ret = 2;
9108 }
9109 }
9110 }
9111
9112 if (local_syms != NULL
9113 && (elf_tdata (isec->owner)->symtab_hdr.contents
9114 != (unsigned char *) local_syms))
9115 free (local_syms);
9116 if (elf_section_data (isec)->relocs != relstart)
9117 free (relstart);
9118
9119 return ret;
9120 }
9121
9122 /* The linker repeatedly calls this function for each input section,
9123 in the order that input sections are linked into output sections.
9124 Build lists of input sections to determine groupings between which
9125 we may insert linker stubs. */
9126
9127 bfd_boolean
9128 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9129 {
9130 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9131
9132 if ((isec->output_section->flags & SEC_CODE) != 0
9133 && isec->output_section->index <= htab->top_index)
9134 {
9135 asection **list = htab->input_list + isec->output_section->index;
9136 /* Steal the link_sec pointer for our list. */
9137 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9138 /* This happens to make the list in reverse order,
9139 which is what we want. */
9140 PREV_SEC (isec) = *list;
9141 *list = isec;
9142 }
9143
9144 if (htab->multi_toc_needed)
9145 {
9146 /* If a code section has a function that uses the TOC then we need
9147 to use the right TOC (obviously). Also, make sure that .opd gets
9148 the correct TOC value for R_PPC64_TOC relocs that don't have or
9149 can't find their function symbol (shouldn't ever happen now).
9150 Also specially treat .fixup for the linux kernel. .fixup
9151 contains branches, but only back to the function that hit an
9152 exception. */
9153 if (isec->has_toc_reloc
9154 || (isec->flags & SEC_CODE) == 0
9155 || strcmp (isec->name, ".fixup") == 0)
9156 {
9157 if (elf_gp (isec->owner) != 0)
9158 htab->toc_curr = elf_gp (isec->owner);
9159 }
9160 else if (htab->stub_group[isec->id].toc_off == 0)
9161 {
9162 int ret = toc_adjusting_stub_needed (info, isec);
9163 if (ret < 0)
9164 return FALSE;
9165 else
9166 isec->makes_toc_func_call = ret & 1;
9167 }
9168 }
9169
9170 /* Functions that don't use the TOC can belong in any TOC group.
9171 Use the last TOC base. This happens to make _init and _fini
9172 pasting work. */
9173 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9174 return TRUE;
9175 }
9176
9177 /* See whether we can group stub sections together. Grouping stub
9178 sections may result in fewer stubs. More importantly, we need to
9179 put all .init* and .fini* stubs at the beginning of the .init or
9180 .fini output sections respectively, because glibc splits the
9181 _init and _fini functions into multiple parts. Putting a stub in
9182 the middle of a function is not a good idea. */
9183
9184 static void
9185 group_sections (struct ppc_link_hash_table *htab,
9186 bfd_size_type stub_group_size,
9187 bfd_boolean stubs_always_before_branch)
9188 {
9189 asection **list;
9190 bfd_size_type stub14_group_size;
9191 bfd_boolean suppress_size_errors;
9192
9193 suppress_size_errors = FALSE;
9194 stub14_group_size = stub_group_size;
9195 if (stub_group_size == 1)
9196 {
9197 /* Default values. */
9198 if (stubs_always_before_branch)
9199 {
9200 stub_group_size = 0x1e00000;
9201 stub14_group_size = 0x7800;
9202 }
9203 else
9204 {
9205 stub_group_size = 0x1c00000;
9206 stub14_group_size = 0x7000;
9207 }
9208 suppress_size_errors = TRUE;
9209 }
9210
9211 list = htab->input_list + htab->top_index;
9212 do
9213 {
9214 asection *tail = *list;
9215 while (tail != NULL)
9216 {
9217 asection *curr;
9218 asection *prev;
9219 bfd_size_type total;
9220 bfd_boolean big_sec;
9221 bfd_vma curr_toc;
9222
9223 curr = tail;
9224 total = tail->size;
9225 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9226 ? stub14_group_size : stub_group_size);
9227 if (big_sec && !suppress_size_errors)
9228 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9229 tail->owner, tail);
9230 curr_toc = htab->stub_group[tail->id].toc_off;
9231
9232 while ((prev = PREV_SEC (curr)) != NULL
9233 && ((total += curr->output_offset - prev->output_offset)
9234 < (ppc64_elf_section_data (prev)->has_14bit_branch
9235 ? stub14_group_size : stub_group_size))
9236 && htab->stub_group[prev->id].toc_off == curr_toc)
9237 curr = prev;
9238
9239 /* OK, the size from the start of CURR to the end is less
9240 than stub_group_size and thus can be handled by one stub
9241 section. (or the tail section is itself larger than
9242 stub_group_size, in which case we may be toast.) We
9243 should really be keeping track of the total size of stubs
9244 added here, as stubs contribute to the final output
9245 section size. That's a little tricky, and this way will
9246 only break if stubs added make the total size more than
9247 2^25, ie. for the default stub_group_size, if stubs total
9248 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9249 do
9250 {
9251 prev = PREV_SEC (tail);
9252 /* Set up this stub group. */
9253 htab->stub_group[tail->id].link_sec = curr;
9254 }
9255 while (tail != curr && (tail = prev) != NULL);
9256
9257 /* But wait, there's more! Input sections up to stub_group_size
9258 bytes before the stub section can be handled by it too.
9259 Don't do this if we have a really large section after the
9260 stubs, as adding more stubs increases the chance that
9261 branches may not reach into the stub section. */
9262 if (!stubs_always_before_branch && !big_sec)
9263 {
9264 total = 0;
9265 while (prev != NULL
9266 && ((total += tail->output_offset - prev->output_offset)
9267 < (ppc64_elf_section_data (prev)->has_14bit_branch
9268 ? stub14_group_size : stub_group_size))
9269 && htab->stub_group[prev->id].toc_off == curr_toc)
9270 {
9271 tail = prev;
9272 prev = PREV_SEC (tail);
9273 htab->stub_group[tail->id].link_sec = curr;
9274 }
9275 }
9276 tail = prev;
9277 }
9278 }
9279 while (list-- != htab->input_list);
9280 free (htab->input_list);
9281 #undef PREV_SEC
9282 }
9283
9284 /* Determine and set the size of the stub section for a final link.
9285
9286 The basic idea here is to examine all the relocations looking for
9287 PC-relative calls to a target that is unreachable with a "bl"
9288 instruction. */
9289
9290 bfd_boolean
9291 ppc64_elf_size_stubs (bfd *output_bfd,
9292 struct bfd_link_info *info,
9293 bfd_signed_vma group_size,
9294 asection *(*add_stub_section) (const char *, asection *),
9295 void (*layout_sections_again) (void))
9296 {
9297 bfd_size_type stub_group_size;
9298 bfd_boolean stubs_always_before_branch;
9299 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9300
9301 /* Stash our params away. */
9302 htab->add_stub_section = add_stub_section;
9303 htab->layout_sections_again = layout_sections_again;
9304 stubs_always_before_branch = group_size < 0;
9305 if (group_size < 0)
9306 stub_group_size = -group_size;
9307 else
9308 stub_group_size = group_size;
9309
9310 group_sections (htab, stub_group_size, stubs_always_before_branch);
9311
9312 while (1)
9313 {
9314 bfd *input_bfd;
9315 unsigned int bfd_indx;
9316 asection *stub_sec;
9317
9318 htab->stub_iteration += 1;
9319
9320 for (input_bfd = info->input_bfds, bfd_indx = 0;
9321 input_bfd != NULL;
9322 input_bfd = input_bfd->link_next, bfd_indx++)
9323 {
9324 Elf_Internal_Shdr *symtab_hdr;
9325 asection *section;
9326 Elf_Internal_Sym *local_syms = NULL;
9327
9328 if (!is_ppc64_elf_target (input_bfd->xvec))
9329 continue;
9330
9331 /* We'll need the symbol table in a second. */
9332 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9333 if (symtab_hdr->sh_info == 0)
9334 continue;
9335
9336 /* Walk over each section attached to the input bfd. */
9337 for (section = input_bfd->sections;
9338 section != NULL;
9339 section = section->next)
9340 {
9341 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9342
9343 /* If there aren't any relocs, then there's nothing more
9344 to do. */
9345 if ((section->flags & SEC_RELOC) == 0
9346 || (section->flags & SEC_ALLOC) == 0
9347 || (section->flags & SEC_LOAD) == 0
9348 || (section->flags & SEC_CODE) == 0
9349 || section->reloc_count == 0)
9350 continue;
9351
9352 /* If this section is a link-once section that will be
9353 discarded, then don't create any stubs. */
9354 if (section->output_section == NULL
9355 || section->output_section->owner != output_bfd)
9356 continue;
9357
9358 /* Get the relocs. */
9359 internal_relocs
9360 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9361 info->keep_memory);
9362 if (internal_relocs == NULL)
9363 goto error_ret_free_local;
9364
9365 /* Now examine each relocation. */
9366 irela = internal_relocs;
9367 irelaend = irela + section->reloc_count;
9368 for (; irela < irelaend; irela++)
9369 {
9370 enum elf_ppc64_reloc_type r_type;
9371 unsigned int r_indx;
9372 enum ppc_stub_type stub_type;
9373 struct ppc_stub_hash_entry *stub_entry;
9374 asection *sym_sec, *code_sec;
9375 bfd_vma sym_value;
9376 bfd_vma destination;
9377 bfd_boolean ok_dest;
9378 struct ppc_link_hash_entry *hash;
9379 struct ppc_link_hash_entry *fdh;
9380 struct elf_link_hash_entry *h;
9381 Elf_Internal_Sym *sym;
9382 char *stub_name;
9383 const asection *id_sec;
9384 long *opd_adjust;
9385
9386 r_type = ELF64_R_TYPE (irela->r_info);
9387 r_indx = ELF64_R_SYM (irela->r_info);
9388
9389 if (r_type >= R_PPC64_max)
9390 {
9391 bfd_set_error (bfd_error_bad_value);
9392 goto error_ret_free_internal;
9393 }
9394
9395 /* Only look for stubs on branch instructions. */
9396 if (r_type != R_PPC64_REL24
9397 && r_type != R_PPC64_REL14
9398 && r_type != R_PPC64_REL14_BRTAKEN
9399 && r_type != R_PPC64_REL14_BRNTAKEN)
9400 continue;
9401
9402 /* Now determine the call target, its name, value,
9403 section. */
9404 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9405 r_indx, input_bfd))
9406 goto error_ret_free_internal;
9407 hash = (struct ppc_link_hash_entry *) h;
9408
9409 ok_dest = FALSE;
9410 fdh = NULL;
9411 sym_value = 0;
9412 if (hash == NULL)
9413 {
9414 sym_value = sym->st_value;
9415 ok_dest = TRUE;
9416 }
9417 else if (hash->elf.root.type == bfd_link_hash_defined
9418 || hash->elf.root.type == bfd_link_hash_defweak)
9419 {
9420 sym_value = hash->elf.root.u.def.value;
9421 if (sym_sec->output_section != NULL)
9422 ok_dest = TRUE;
9423 }
9424 else if (hash->elf.root.type == bfd_link_hash_undefweak
9425 || hash->elf.root.type == bfd_link_hash_undefined)
9426 {
9427 /* Recognise an old ABI func code entry sym, and
9428 use the func descriptor sym instead if it is
9429 defined. */
9430 if (hash->elf.root.root.string[0] == '.'
9431 && (fdh = get_fdh (hash, htab)) != NULL)
9432 {
9433 if (fdh->elf.root.type == bfd_link_hash_defined
9434 || fdh->elf.root.type == bfd_link_hash_defweak)
9435 {
9436 sym_sec = fdh->elf.root.u.def.section;
9437 sym_value = fdh->elf.root.u.def.value;
9438 if (sym_sec->output_section != NULL)
9439 ok_dest = TRUE;
9440 }
9441 else
9442 fdh = NULL;
9443 }
9444 }
9445 else
9446 {
9447 bfd_set_error (bfd_error_bad_value);
9448 goto error_ret_free_internal;
9449 }
9450
9451 destination = 0;
9452 if (ok_dest)
9453 {
9454 sym_value += irela->r_addend;
9455 destination = (sym_value
9456 + sym_sec->output_offset
9457 + sym_sec->output_section->vma);
9458 }
9459
9460 code_sec = sym_sec;
9461 opd_adjust = get_opd_info (sym_sec);
9462 if (opd_adjust != NULL)
9463 {
9464 bfd_vma dest;
9465
9466 if (hash == NULL)
9467 {
9468 long adjust = opd_adjust[sym_value / 8];
9469 if (adjust == -1)
9470 continue;
9471 sym_value += adjust;
9472 }
9473 dest = opd_entry_value (sym_sec, sym_value,
9474 &code_sec, &sym_value);
9475 if (dest != (bfd_vma) -1)
9476 {
9477 destination = dest;
9478 if (fdh != NULL)
9479 {
9480 /* Fixup old ABI sym to point at code
9481 entry. */
9482 hash->elf.root.type = bfd_link_hash_defweak;
9483 hash->elf.root.u.def.section = code_sec;
9484 hash->elf.root.u.def.value = sym_value;
9485 }
9486 }
9487 }
9488
9489 /* Determine what (if any) linker stub is needed. */
9490 stub_type = ppc_type_of_stub (section, irela, &hash,
9491 destination);
9492
9493 if (stub_type != ppc_stub_plt_call)
9494 {
9495 /* Check whether we need a TOC adjusting stub.
9496 Since the linker pastes together pieces from
9497 different object files when creating the
9498 _init and _fini functions, it may be that a
9499 call to what looks like a local sym is in
9500 fact a call needing a TOC adjustment. */
9501 if (code_sec != NULL
9502 && code_sec->output_section != NULL
9503 && (htab->stub_group[code_sec->id].toc_off
9504 != htab->stub_group[section->id].toc_off)
9505 && (code_sec->has_toc_reloc
9506 || code_sec->makes_toc_func_call))
9507 stub_type = ppc_stub_long_branch_r2off;
9508 }
9509
9510 if (stub_type == ppc_stub_none)
9511 continue;
9512
9513 /* __tls_get_addr calls might be eliminated. */
9514 if (stub_type != ppc_stub_plt_call
9515 && hash != NULL
9516 && (hash == htab->tls_get_addr
9517 || hash == htab->tls_get_addr_fd)
9518 && section->has_tls_reloc
9519 && irela != internal_relocs)
9520 {
9521 /* Get tls info. */
9522 char *tls_mask;
9523
9524 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9525 irela - 1, input_bfd))
9526 goto error_ret_free_internal;
9527 if (*tls_mask != 0)
9528 continue;
9529 }
9530
9531 /* Support for grouping stub sections. */
9532 id_sec = htab->stub_group[section->id].link_sec;
9533
9534 /* Get the name of this stub. */
9535 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9536 if (!stub_name)
9537 goto error_ret_free_internal;
9538
9539 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9540 stub_name, FALSE, FALSE);
9541 if (stub_entry != NULL)
9542 {
9543 /* The proper stub has already been created. */
9544 free (stub_name);
9545 continue;
9546 }
9547
9548 stub_entry = ppc_add_stub (stub_name, section, htab);
9549 if (stub_entry == NULL)
9550 {
9551 free (stub_name);
9552 error_ret_free_internal:
9553 if (elf_section_data (section)->relocs == NULL)
9554 free (internal_relocs);
9555 error_ret_free_local:
9556 if (local_syms != NULL
9557 && (symtab_hdr->contents
9558 != (unsigned char *) local_syms))
9559 free (local_syms);
9560 return FALSE;
9561 }
9562
9563 stub_entry->stub_type = stub_type;
9564 stub_entry->target_value = sym_value;
9565 stub_entry->target_section = code_sec;
9566 stub_entry->h = hash;
9567 stub_entry->addend = irela->r_addend;
9568
9569 if (stub_entry->h != NULL)
9570 htab->stub_globals += 1;
9571 }
9572
9573 /* We're done with the internal relocs, free them. */
9574 if (elf_section_data (section)->relocs != internal_relocs)
9575 free (internal_relocs);
9576 }
9577
9578 if (local_syms != NULL
9579 && symtab_hdr->contents != (unsigned char *) local_syms)
9580 {
9581 if (!info->keep_memory)
9582 free (local_syms);
9583 else
9584 symtab_hdr->contents = (unsigned char *) local_syms;
9585 }
9586 }
9587
9588 /* We may have added some stubs. Find out the new size of the
9589 stub sections. */
9590 for (stub_sec = htab->stub_bfd->sections;
9591 stub_sec != NULL;
9592 stub_sec = stub_sec->next)
9593 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9594 {
9595 stub_sec->rawsize = stub_sec->size;
9596 stub_sec->size = 0;
9597 stub_sec->reloc_count = 0;
9598 stub_sec->flags &= ~SEC_RELOC;
9599 }
9600
9601 htab->brlt->size = 0;
9602 htab->brlt->reloc_count = 0;
9603 htab->brlt->flags &= ~SEC_RELOC;
9604 if (htab->relbrlt != NULL)
9605 htab->relbrlt->size = 0;
9606
9607 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9608
9609 for (stub_sec = htab->stub_bfd->sections;
9610 stub_sec != NULL;
9611 stub_sec = stub_sec->next)
9612 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9613 && stub_sec->rawsize != stub_sec->size)
9614 break;
9615
9616 /* Exit from this loop when no stubs have been added, and no stubs
9617 have changed size. */
9618 if (stub_sec == NULL)
9619 break;
9620
9621 /* Ask the linker to do its stuff. */
9622 (*htab->layout_sections_again) ();
9623 }
9624
9625 /* It would be nice to strip htab->brlt from the output if the
9626 section is empty, but it's too late. If we strip sections here,
9627 the dynamic symbol table is corrupted since the section symbol
9628 for the stripped section isn't written. */
9629
9630 return TRUE;
9631 }
9632
9633 /* Called after we have determined section placement. If sections
9634 move, we'll be called again. Provide a value for TOCstart. */
9635
9636 bfd_vma
9637 ppc64_elf_toc (bfd *obfd)
9638 {
9639 asection *s;
9640 bfd_vma TOCstart;
9641
9642 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9643 order. The TOC starts where the first of these sections starts. */
9644 s = bfd_get_section_by_name (obfd, ".got");
9645 if (s == NULL)
9646 s = bfd_get_section_by_name (obfd, ".toc");
9647 if (s == NULL)
9648 s = bfd_get_section_by_name (obfd, ".tocbss");
9649 if (s == NULL)
9650 s = bfd_get_section_by_name (obfd, ".plt");
9651 if (s == NULL)
9652 {
9653 /* This may happen for
9654 o references to TOC base (SYM@toc / TOC[tc0]) without a
9655 .toc directive
9656 o bad linker script
9657 o --gc-sections and empty TOC sections
9658
9659 FIXME: Warn user? */
9660
9661 /* Look for a likely section. We probably won't even be
9662 using TOCstart. */
9663 for (s = obfd->sections; s != NULL; s = s->next)
9664 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9665 == (SEC_ALLOC | SEC_SMALL_DATA))
9666 break;
9667 if (s == NULL)
9668 for (s = obfd->sections; s != NULL; s = s->next)
9669 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9670 == (SEC_ALLOC | SEC_SMALL_DATA))
9671 break;
9672 if (s == NULL)
9673 for (s = obfd->sections; s != NULL; s = s->next)
9674 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9675 break;
9676 if (s == NULL)
9677 for (s = obfd->sections; s != NULL; s = s->next)
9678 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9679 break;
9680 }
9681
9682 TOCstart = 0;
9683 if (s != NULL)
9684 TOCstart = s->output_section->vma + s->output_offset;
9685
9686 return TOCstart;
9687 }
9688
9689 /* Build all the stubs associated with the current output file.
9690 The stubs are kept in a hash table attached to the main linker
9691 hash table. This function is called via gldelf64ppc_finish. */
9692
9693 bfd_boolean
9694 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9695 struct bfd_link_info *info,
9696 char **stats)
9697 {
9698 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9699 asection *stub_sec;
9700 bfd_byte *p;
9701 int stub_sec_count = 0;
9702
9703 htab->emit_stub_syms = emit_stub_syms;
9704
9705 /* Allocate memory to hold the linker stubs. */
9706 for (stub_sec = htab->stub_bfd->sections;
9707 stub_sec != NULL;
9708 stub_sec = stub_sec->next)
9709 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9710 && stub_sec->size != 0)
9711 {
9712 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9713 if (stub_sec->contents == NULL)
9714 return FALSE;
9715 /* We want to check that built size is the same as calculated
9716 size. rawsize is a convenient location to use. */
9717 stub_sec->rawsize = stub_sec->size;
9718 stub_sec->size = 0;
9719 }
9720
9721 if (htab->glink != NULL && htab->glink->size != 0)
9722 {
9723 unsigned int indx;
9724 bfd_vma plt0;
9725
9726 /* Build the .glink plt call stub. */
9727 if (htab->emit_stub_syms)
9728 {
9729 struct elf_link_hash_entry *h;
9730 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9731 if (h == NULL)
9732 return FALSE;
9733 if (h->root.type == bfd_link_hash_new)
9734 {
9735 h->root.type = bfd_link_hash_defined;
9736 h->root.u.def.section = htab->glink;
9737 h->root.u.def.value = 8;
9738 h->ref_regular = 1;
9739 h->def_regular = 1;
9740 h->ref_regular_nonweak = 1;
9741 h->forced_local = 1;
9742 h->non_elf = 0;
9743 }
9744 }
9745 p = htab->glink->contents;
9746 plt0 = (htab->plt->output_section->vma
9747 + htab->plt->output_offset
9748 - (htab->glink->output_section->vma
9749 + htab->glink->output_offset
9750 + 16));
9751 bfd_put_64 (htab->glink->owner, plt0, p);
9752 p += 8;
9753 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9754 p += 4;
9755 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9756 p += 4;
9757 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9758 p += 4;
9759 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9760 p += 4;
9761 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9762 p += 4;
9763 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9764 p += 4;
9765 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9766 p += 4;
9767 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9768 p += 4;
9769 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9770 p += 4;
9771 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9772 p += 4;
9773 bfd_put_32 (htab->glink->owner, BCTR, p);
9774 p += 4;
9775 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9776 {
9777 bfd_put_32 (htab->glink->owner, NOP, p);
9778 p += 4;
9779 }
9780
9781 /* Build the .glink lazy link call stubs. */
9782 indx = 0;
9783 while (p < htab->glink->contents + htab->glink->size)
9784 {
9785 if (indx < 0x8000)
9786 {
9787 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9788 p += 4;
9789 }
9790 else
9791 {
9792 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9793 p += 4;
9794 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9795 p += 4;
9796 }
9797 bfd_put_32 (htab->glink->owner,
9798 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9799 indx++;
9800 p += 4;
9801 }
9802 htab->glink->rawsize = p - htab->glink->contents;
9803 }
9804
9805 if (htab->brlt->size != 0)
9806 {
9807 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9808 htab->brlt->size);
9809 if (htab->brlt->contents == NULL)
9810 return FALSE;
9811 }
9812 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9813 {
9814 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9815 htab->relbrlt->size);
9816 if (htab->relbrlt->contents == NULL)
9817 return FALSE;
9818 }
9819
9820 /* Build the stubs as directed by the stub hash table. */
9821 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9822
9823 if (htab->relbrlt != NULL)
9824 htab->relbrlt->reloc_count = 0;
9825
9826 for (stub_sec = htab->stub_bfd->sections;
9827 stub_sec != NULL;
9828 stub_sec = stub_sec->next)
9829 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9830 {
9831 stub_sec_count += 1;
9832 if (stub_sec->rawsize != stub_sec->size)
9833 break;
9834 }
9835
9836 if (stub_sec != NULL
9837 || htab->glink->rawsize != htab->glink->size)
9838 {
9839 htab->stub_error = TRUE;
9840 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9841 }
9842
9843 if (htab->stub_error)
9844 return FALSE;
9845
9846 if (stats != NULL)
9847 {
9848 *stats = bfd_malloc (500);
9849 if (*stats == NULL)
9850 return FALSE;
9851
9852 sprintf (*stats, _("linker stubs in %u group%s\n"
9853 " branch %lu\n"
9854 " toc adjust %lu\n"
9855 " long branch %lu\n"
9856 " long toc adj %lu\n"
9857 " plt call %lu"),
9858 stub_sec_count,
9859 stub_sec_count == 1 ? "" : "s",
9860 htab->stub_count[ppc_stub_long_branch - 1],
9861 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9862 htab->stub_count[ppc_stub_plt_branch - 1],
9863 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9864 htab->stub_count[ppc_stub_plt_call - 1]);
9865 }
9866 return TRUE;
9867 }
9868
9869 /* This function undoes the changes made by add_symbol_adjust. */
9870
9871 static bfd_boolean
9872 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9873 {
9874 struct ppc_link_hash_entry *eh;
9875
9876 if (h->root.type == bfd_link_hash_indirect)
9877 return TRUE;
9878
9879 if (h->root.type == bfd_link_hash_warning)
9880 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9881
9882 eh = (struct ppc_link_hash_entry *) h;
9883 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9884 return TRUE;
9885
9886 eh->elf.root.type = bfd_link_hash_undefined;
9887 return TRUE;
9888 }
9889
9890 void
9891 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9892 {
9893 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9894 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9895 }
9896
9897 /* What to do when ld finds relocations against symbols defined in
9898 discarded sections. */
9899
9900 static unsigned int
9901 ppc64_elf_action_discarded (asection *sec)
9902 {
9903 if (strcmp (".opd", sec->name) == 0)
9904 return 0;
9905
9906 if (strcmp (".toc", sec->name) == 0)
9907 return 0;
9908
9909 if (strcmp (".toc1", sec->name) == 0)
9910 return 0;
9911
9912 return _bfd_elf_default_action_discarded (sec);
9913 }
9914
9915 /* The RELOCATE_SECTION function is called by the ELF backend linker
9916 to handle the relocations for a section.
9917
9918 The relocs are always passed as Rela structures; if the section
9919 actually uses Rel structures, the r_addend field will always be
9920 zero.
9921
9922 This function is responsible for adjust the section contents as
9923 necessary, and (if using Rela relocs and generating a
9924 relocatable output file) adjusting the reloc addend as
9925 necessary.
9926
9927 This function does not have to worry about setting the reloc
9928 address or the reloc symbol index.
9929
9930 LOCAL_SYMS is a pointer to the swapped in local symbols.
9931
9932 LOCAL_SECTIONS is an array giving the section in the input file
9933 corresponding to the st_shndx field of each local symbol.
9934
9935 The global hash table entry for the global symbols can be found
9936 via elf_sym_hashes (input_bfd).
9937
9938 When generating relocatable output, this function must handle
9939 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9940 going to be the section symbol corresponding to the output
9941 section, which means that the addend must be adjusted
9942 accordingly. */
9943
9944 static bfd_boolean
9945 ppc64_elf_relocate_section (bfd *output_bfd,
9946 struct bfd_link_info *info,
9947 bfd *input_bfd,
9948 asection *input_section,
9949 bfd_byte *contents,
9950 Elf_Internal_Rela *relocs,
9951 Elf_Internal_Sym *local_syms,
9952 asection **local_sections)
9953 {
9954 struct ppc_link_hash_table *htab;
9955 Elf_Internal_Shdr *symtab_hdr;
9956 struct elf_link_hash_entry **sym_hashes;
9957 Elf_Internal_Rela *rel;
9958 Elf_Internal_Rela *relend;
9959 Elf_Internal_Rela outrel;
9960 bfd_byte *loc;
9961 struct got_entry **local_got_ents;
9962 bfd_vma TOCstart;
9963 bfd_boolean ret = TRUE;
9964 bfd_boolean is_opd;
9965 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9966 bfd_boolean is_power4 = FALSE;
9967 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
9968
9969 /* Initialize howto table if needed. */
9970 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9971 ppc_howto_init ();
9972
9973 htab = ppc_hash_table (info);
9974
9975 /* Don't relocate stub sections. */
9976 if (input_section->owner == htab->stub_bfd)
9977 return TRUE;
9978
9979 local_got_ents = elf_local_got_ents (input_bfd);
9980 TOCstart = elf_gp (output_bfd);
9981 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9982 sym_hashes = elf_sym_hashes (input_bfd);
9983 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
9984
9985 rel = relocs;
9986 relend = relocs + input_section->reloc_count;
9987 for (; rel < relend; rel++)
9988 {
9989 enum elf_ppc64_reloc_type r_type;
9990 bfd_vma addend, orig_addend;
9991 bfd_reloc_status_type r;
9992 Elf_Internal_Sym *sym;
9993 asection *sec;
9994 struct elf_link_hash_entry *h_elf;
9995 struct ppc_link_hash_entry *h;
9996 struct ppc_link_hash_entry *fdh;
9997 const char *sym_name;
9998 unsigned long r_symndx, toc_symndx;
9999 char tls_mask, tls_gd, tls_type;
10000 char sym_type;
10001 bfd_vma relocation;
10002 bfd_boolean unresolved_reloc;
10003 bfd_boolean warned;
10004 unsigned long insn, mask;
10005 struct ppc_stub_hash_entry *stub_entry;
10006 bfd_vma max_br_offset;
10007 bfd_vma from;
10008
10009 r_type = ELF64_R_TYPE (rel->r_info);
10010 r_symndx = ELF64_R_SYM (rel->r_info);
10011
10012 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10013 symbol of the previous ADDR64 reloc. The symbol gives us the
10014 proper TOC base to use. */
10015 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10016 && rel != relocs
10017 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10018 && is_opd)
10019 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10020
10021 sym = NULL;
10022 sec = NULL;
10023 h_elf = NULL;
10024 sym_name = NULL;
10025 unresolved_reloc = FALSE;
10026 warned = FALSE;
10027 orig_addend = rel->r_addend;
10028
10029 if (r_symndx < symtab_hdr->sh_info)
10030 {
10031 /* It's a local symbol. */
10032 long *opd_adjust;
10033
10034 sym = local_syms + r_symndx;
10035 sec = local_sections[r_symndx];
10036 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10037 sym_type = ELF64_ST_TYPE (sym->st_info);
10038 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10039 opd_adjust = get_opd_info (sec);
10040 if (opd_adjust != NULL)
10041 {
10042 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
10043 if (adjust == -1)
10044 relocation = 0;
10045 else
10046 {
10047 /* If this is a relocation against the opd section sym
10048 and we have edited .opd, adjust the reloc addend so
10049 that ld -r and ld --emit-relocs output is correct.
10050 If it is a reloc against some other .opd symbol,
10051 then the symbol value will be adjusted later. */
10052 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10053 rel->r_addend += adjust;
10054 else
10055 relocation += adjust;
10056 }
10057 }
10058 }
10059 else
10060 {
10061 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10062 r_symndx, symtab_hdr, sym_hashes,
10063 h_elf, sec, relocation,
10064 unresolved_reloc, warned);
10065 sym_name = h_elf->root.root.string;
10066 sym_type = h_elf->type;
10067 }
10068 h = (struct ppc_link_hash_entry *) h_elf;
10069
10070 if (sec != NULL && elf_discarded_section (sec))
10071 {
10072 /* For relocs against symbols from removed linkonce sections,
10073 or sections discarded by a linker script, we just want the
10074 section contents zeroed. Avoid any special processing. */
10075 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10076 contents + rel->r_offset);
10077 rel->r_info = 0;
10078 rel->r_addend = 0;
10079 continue;
10080 }
10081
10082 if (info->relocatable)
10083 continue;
10084
10085 /* TLS optimizations. Replace instruction sequences and relocs
10086 based on information we collected in tls_optimize. We edit
10087 RELOCS so that --emit-relocs will output something sensible
10088 for the final instruction stream. */
10089 tls_mask = 0;
10090 tls_gd = 0;
10091 toc_symndx = 0;
10092 if (IS_PPC64_TLS_RELOC (r_type))
10093 {
10094 if (h != NULL)
10095 tls_mask = h->tls_mask;
10096 else if (local_got_ents != NULL)
10097 {
10098 char *lgot_masks;
10099 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10100 tls_mask = lgot_masks[r_symndx];
10101 }
10102 if (tls_mask == 0 && r_type == R_PPC64_TLS)
10103 {
10104 /* Check for toc tls entries. */
10105 char *toc_tls;
10106
10107 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10108 rel, input_bfd))
10109 return FALSE;
10110
10111 if (toc_tls)
10112 tls_mask = *toc_tls;
10113 }
10114 }
10115
10116 /* Check that tls relocs are used with tls syms, and non-tls
10117 relocs are used with non-tls syms. */
10118 if (r_symndx != 0
10119 && r_type != R_PPC64_NONE
10120 && (h == NULL
10121 || h->elf.root.type == bfd_link_hash_defined
10122 || h->elf.root.type == bfd_link_hash_defweak)
10123 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
10124 {
10125 if (r_type == R_PPC64_TLS && tls_mask != 0)
10126 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10127 ;
10128 else
10129 (*_bfd_error_handler)
10130 (sym_type == STT_TLS
10131 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10132 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10133 input_bfd,
10134 input_section,
10135 (long) rel->r_offset,
10136 ppc64_elf_howto_table[r_type]->name,
10137 sym_name);
10138 }
10139
10140 /* Ensure reloc mapping code below stays sane. */
10141 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10142 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10143 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10144 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10145 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10146 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10147 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10148 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10149 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10150 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10151 abort ();
10152
10153 switch (r_type)
10154 {
10155 default:
10156 break;
10157
10158 case R_PPC64_TOC16:
10159 case R_PPC64_TOC16_LO:
10160 case R_PPC64_TOC16_DS:
10161 case R_PPC64_TOC16_LO_DS:
10162 {
10163 /* Check for toc tls entries. */
10164 char *toc_tls;
10165 int retval;
10166
10167 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10168 rel, input_bfd);
10169 if (retval == 0)
10170 return FALSE;
10171
10172 if (toc_tls)
10173 {
10174 tls_mask = *toc_tls;
10175 if (r_type == R_PPC64_TOC16_DS
10176 || r_type == R_PPC64_TOC16_LO_DS)
10177 {
10178 if (tls_mask != 0
10179 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10180 goto toctprel;
10181 }
10182 else
10183 {
10184 /* If we found a GD reloc pair, then we might be
10185 doing a GD->IE transition. */
10186 if (retval == 2)
10187 {
10188 tls_gd = TLS_TPRELGD;
10189 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10190 goto tls_ldgd_opt;
10191 }
10192 else if (retval == 3)
10193 {
10194 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10195 goto tls_ldgd_opt;
10196 }
10197 }
10198 }
10199 }
10200 break;
10201
10202 case R_PPC64_GOT_TPREL16_DS:
10203 case R_PPC64_GOT_TPREL16_LO_DS:
10204 if (tls_mask != 0
10205 && (tls_mask & TLS_TPREL) == 0)
10206 {
10207 toctprel:
10208 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10209 insn &= 31 << 21;
10210 insn |= 0x3c0d0000; /* addis 0,13,0 */
10211 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10212 r_type = R_PPC64_TPREL16_HA;
10213 if (toc_symndx != 0)
10214 {
10215 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10216 /* We changed the symbol. Start over in order to
10217 get h, sym, sec etc. right. */
10218 rel--;
10219 continue;
10220 }
10221 else
10222 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10223 }
10224 break;
10225
10226 case R_PPC64_TLS:
10227 if (tls_mask != 0
10228 && (tls_mask & TLS_TPREL) == 0)
10229 {
10230 bfd_vma rtra;
10231 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10232 if ((insn & ((0x3f << 26) | (31 << 11)))
10233 == ((31 << 26) | (13 << 11)))
10234 rtra = insn & ((1 << 26) - (1 << 16));
10235 else if ((insn & ((0x3f << 26) | (31 << 16)))
10236 == ((31 << 26) | (13 << 16)))
10237 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10238 else
10239 abort ();
10240 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10241 /* add -> addi. */
10242 insn = 14 << 26;
10243 else if ((insn & (31 << 1)) == 23 << 1
10244 && ((insn & (31 << 6)) < 14 << 6
10245 || ((insn & (31 << 6)) >= 16 << 6
10246 && (insn & (31 << 6)) < 24 << 6)))
10247 /* load and store indexed -> dform. */
10248 insn = (32 | ((insn >> 6) & 31)) << 26;
10249 else if ((insn & (31 << 1)) == 21 << 1
10250 && (insn & (0x1a << 6)) == 0)
10251 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10252 insn = (((58 | ((insn >> 6) & 4)) << 26)
10253 | ((insn >> 6) & 1));
10254 else if ((insn & (31 << 1)) == 21 << 1
10255 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10256 /* lwax -> lwa. */
10257 insn = (58 << 26) | 2;
10258 else
10259 abort ();
10260 insn |= rtra;
10261 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10262 /* Was PPC64_TLS which sits on insn boundary, now
10263 PPC64_TPREL16_LO which is at low-order half-word. */
10264 rel->r_offset += d_offset;
10265 r_type = R_PPC64_TPREL16_LO;
10266 if (toc_symndx != 0)
10267 {
10268 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10269 /* We changed the symbol. Start over in order to
10270 get h, sym, sec etc. right. */
10271 rel--;
10272 continue;
10273 }
10274 else
10275 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10276 }
10277 break;
10278
10279 case R_PPC64_GOT_TLSGD16_HI:
10280 case R_PPC64_GOT_TLSGD16_HA:
10281 tls_gd = TLS_TPRELGD;
10282 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10283 goto tls_gdld_hi;
10284 break;
10285
10286 case R_PPC64_GOT_TLSLD16_HI:
10287 case R_PPC64_GOT_TLSLD16_HA:
10288 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10289 {
10290 tls_gdld_hi:
10291 if ((tls_mask & tls_gd) != 0)
10292 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10293 + R_PPC64_GOT_TPREL16_DS);
10294 else
10295 {
10296 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10297 rel->r_offset -= d_offset;
10298 r_type = R_PPC64_NONE;
10299 }
10300 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10301 }
10302 break;
10303
10304 case R_PPC64_GOT_TLSGD16:
10305 case R_PPC64_GOT_TLSGD16_LO:
10306 tls_gd = TLS_TPRELGD;
10307 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10308 goto tls_ldgd_opt;
10309 break;
10310
10311 case R_PPC64_GOT_TLSLD16:
10312 case R_PPC64_GOT_TLSLD16_LO:
10313 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10314 {
10315 bfd_vma insn1, insn2, insn3;
10316 bfd_vma offset;
10317
10318 tls_ldgd_opt:
10319 /* We know that the next reloc is on a tls_get_addr
10320 call, since ppc64_elf_tls_optimize checks this. */
10321 offset = rel[1].r_offset;
10322 insn1 = bfd_get_32 (output_bfd,
10323 contents + rel->r_offset - d_offset);
10324 insn3 = bfd_get_32 (output_bfd,
10325 contents + offset + 4);
10326 if ((tls_mask & tls_gd) != 0)
10327 {
10328 /* IE */
10329 insn1 &= (1 << 26) - (1 << 2);
10330 insn1 |= 58 << 26; /* ld */
10331 insn2 = 0x7c636a14; /* add 3,3,13 */
10332 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10333 R_PPC64_NONE);
10334 if ((tls_mask & TLS_EXPLICIT) == 0)
10335 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10336 + R_PPC64_GOT_TPREL16_DS);
10337 else
10338 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10339 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10340 }
10341 else
10342 {
10343 /* LE */
10344 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10345 insn2 = 0x38630000; /* addi 3,3,0 */
10346 if (tls_gd == 0)
10347 {
10348 /* Was an LD reloc. */
10349 r_symndx = 0;
10350 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10351 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10352 }
10353 else if (toc_symndx != 0)
10354 r_symndx = toc_symndx;
10355 r_type = R_PPC64_TPREL16_HA;
10356 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10357 rel[1].r_info = ELF64_R_INFO (r_symndx,
10358 R_PPC64_TPREL16_LO);
10359 rel[1].r_offset += d_offset;
10360 }
10361 if (insn3 == NOP
10362 || insn3 == CROR_151515 || insn3 == CROR_313131)
10363 {
10364 insn3 = insn2;
10365 insn2 = NOP;
10366 rel[1].r_offset += 4;
10367 }
10368 bfd_put_32 (output_bfd, insn1,
10369 contents + rel->r_offset - d_offset);
10370 bfd_put_32 (output_bfd, insn2, contents + offset);
10371 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10372 if (tls_gd == 0 || toc_symndx != 0)
10373 {
10374 /* We changed the symbol. Start over in order
10375 to get h, sym, sec etc. right. */
10376 rel--;
10377 continue;
10378 }
10379 }
10380 break;
10381
10382 case R_PPC64_DTPMOD64:
10383 if (rel + 1 < relend
10384 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10385 && rel[1].r_offset == rel->r_offset + 8)
10386 {
10387 if ((tls_mask & TLS_GD) == 0)
10388 {
10389 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10390 if ((tls_mask & TLS_TPRELGD) != 0)
10391 r_type = R_PPC64_TPREL64;
10392 else
10393 {
10394 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10395 r_type = R_PPC64_NONE;
10396 }
10397 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10398 }
10399 }
10400 else
10401 {
10402 if ((tls_mask & TLS_LD) == 0)
10403 {
10404 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10405 r_type = R_PPC64_NONE;
10406 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10407 }
10408 }
10409 break;
10410
10411 case R_PPC64_TPREL64:
10412 if ((tls_mask & TLS_TPREL) == 0)
10413 {
10414 r_type = R_PPC64_NONE;
10415 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10416 }
10417 break;
10418 }
10419
10420 /* Handle other relocations that tweak non-addend part of insn. */
10421 insn = 0;
10422 max_br_offset = 1 << 25;
10423 addend = rel->r_addend;
10424 switch (r_type)
10425 {
10426 default:
10427 break;
10428
10429 /* Branch taken prediction relocations. */
10430 case R_PPC64_ADDR14_BRTAKEN:
10431 case R_PPC64_REL14_BRTAKEN:
10432 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10433 /* Fall thru. */
10434
10435 /* Branch not taken prediction relocations. */
10436 case R_PPC64_ADDR14_BRNTAKEN:
10437 case R_PPC64_REL14_BRNTAKEN:
10438 insn |= bfd_get_32 (output_bfd,
10439 contents + rel->r_offset) & ~(0x01 << 21);
10440 /* Fall thru. */
10441
10442 case R_PPC64_REL14:
10443 max_br_offset = 1 << 15;
10444 /* Fall thru. */
10445
10446 case R_PPC64_REL24:
10447 /* Calls to functions with a different TOC, such as calls to
10448 shared objects, need to alter the TOC pointer. This is
10449 done using a linkage stub. A REL24 branching to these
10450 linkage stubs needs to be followed by a nop, as the nop
10451 will be replaced with an instruction to restore the TOC
10452 base pointer. */
10453 stub_entry = NULL;
10454 fdh = h;
10455 if (((h != NULL
10456 && (((fdh = h->oh) != NULL
10457 && fdh->elf.plt.plist != NULL)
10458 || (fdh = h)->elf.plt.plist != NULL))
10459 || (sec != NULL
10460 && sec->output_section != NULL
10461 && sec->id <= htab->top_id
10462 && (htab->stub_group[sec->id].toc_off
10463 != htab->stub_group[input_section->id].toc_off)))
10464 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10465 rel, htab)) != NULL
10466 && (stub_entry->stub_type == ppc_stub_plt_call
10467 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10468 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10469 {
10470 bfd_boolean can_plt_call = FALSE;
10471
10472 if (rel->r_offset + 8 <= input_section->size)
10473 {
10474 unsigned long nop;
10475 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10476 if (nop == NOP
10477 || nop == CROR_151515 || nop == CROR_313131)
10478 {
10479 bfd_put_32 (input_bfd, LD_R2_40R1,
10480 contents + rel->r_offset + 4);
10481 can_plt_call = TRUE;
10482 }
10483 }
10484
10485 if (!can_plt_call)
10486 {
10487 if (stub_entry->stub_type == ppc_stub_plt_call)
10488 {
10489 /* If this is a plain branch rather than a branch
10490 and link, don't require a nop. However, don't
10491 allow tail calls in a shared library as they
10492 will result in r2 being corrupted. */
10493 unsigned long br;
10494 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10495 if (info->executable && (br & 1) == 0)
10496 can_plt_call = TRUE;
10497 else
10498 stub_entry = NULL;
10499 }
10500 else if (h != NULL
10501 && strcmp (h->elf.root.root.string,
10502 ".__libc_start_main") == 0)
10503 {
10504 /* Allow crt1 branch to go via a toc adjusting stub. */
10505 can_plt_call = TRUE;
10506 }
10507 else
10508 {
10509 if (strcmp (input_section->output_section->name,
10510 ".init") == 0
10511 || strcmp (input_section->output_section->name,
10512 ".fini") == 0)
10513 (*_bfd_error_handler)
10514 (_("%B(%A+0x%lx): automatic multiple TOCs "
10515 "not supported using your crt files; "
10516 "recompile with -mminimal-toc or upgrade gcc"),
10517 input_bfd,
10518 input_section,
10519 (long) rel->r_offset);
10520 else
10521 (*_bfd_error_handler)
10522 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10523 "does not allow automatic multiple TOCs; "
10524 "recompile with -mminimal-toc or "
10525 "-fno-optimize-sibling-calls, "
10526 "or make `%s' extern"),
10527 input_bfd,
10528 input_section,
10529 (long) rel->r_offset,
10530 sym_name,
10531 sym_name);
10532 bfd_set_error (bfd_error_bad_value);
10533 ret = FALSE;
10534 }
10535 }
10536
10537 if (can_plt_call
10538 && stub_entry->stub_type == ppc_stub_plt_call)
10539 unresolved_reloc = FALSE;
10540 }
10541
10542 if (stub_entry == NULL
10543 && get_opd_info (sec) != NULL)
10544 {
10545 /* The branch destination is the value of the opd entry. */
10546 bfd_vma off = (relocation + addend
10547 - sec->output_section->vma
10548 - sec->output_offset);
10549 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10550 if (dest != (bfd_vma) -1)
10551 {
10552 relocation = dest;
10553 addend = 0;
10554 }
10555 }
10556
10557 /* If the branch is out of reach we ought to have a long
10558 branch stub. */
10559 from = (rel->r_offset
10560 + input_section->output_offset
10561 + input_section->output_section->vma);
10562
10563 if (stub_entry == NULL
10564 && (relocation + addend - from + max_br_offset
10565 >= 2 * max_br_offset)
10566 && r_type != R_PPC64_ADDR14_BRTAKEN
10567 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10568 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10569 htab);
10570
10571 if (stub_entry != NULL)
10572 {
10573 /* Munge up the value and addend so that we call the stub
10574 rather than the procedure directly. */
10575 relocation = (stub_entry->stub_offset
10576 + stub_entry->stub_sec->output_offset
10577 + stub_entry->stub_sec->output_section->vma);
10578 addend = 0;
10579 }
10580
10581 if (insn != 0)
10582 {
10583 if (is_power4)
10584 {
10585 /* Set 'a' bit. This is 0b00010 in BO field for branch
10586 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10587 for branch on CTR insns (BO == 1a00t or 1a01t). */
10588 if ((insn & (0x14 << 21)) == (0x04 << 21))
10589 insn |= 0x02 << 21;
10590 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10591 insn |= 0x08 << 21;
10592 else
10593 break;
10594 }
10595 else
10596 {
10597 /* Invert 'y' bit if not the default. */
10598 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10599 insn ^= 0x01 << 21;
10600 }
10601
10602 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10603 }
10604
10605 /* NOP out calls to undefined weak functions.
10606 We can thus call a weak function without first
10607 checking whether the function is defined. */
10608 else if (h != NULL
10609 && h->elf.root.type == bfd_link_hash_undefweak
10610 && r_type == R_PPC64_REL24
10611 && relocation == 0
10612 && addend == 0)
10613 {
10614 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10615 continue;
10616 }
10617 break;
10618 }
10619
10620 /* Set `addend'. */
10621 tls_type = 0;
10622 switch (r_type)
10623 {
10624 default:
10625 (*_bfd_error_handler)
10626 (_("%B: unknown relocation type %d for symbol %s"),
10627 input_bfd, (int) r_type, sym_name);
10628
10629 bfd_set_error (bfd_error_bad_value);
10630 ret = FALSE;
10631 continue;
10632
10633 case R_PPC64_NONE:
10634 case R_PPC64_TLS:
10635 case R_PPC64_GNU_VTINHERIT:
10636 case R_PPC64_GNU_VTENTRY:
10637 continue;
10638
10639 /* GOT16 relocations. Like an ADDR16 using the symbol's
10640 address in the GOT as relocation value instead of the
10641 symbol's value itself. Also, create a GOT entry for the
10642 symbol and put the symbol value there. */
10643 case R_PPC64_GOT_TLSGD16:
10644 case R_PPC64_GOT_TLSGD16_LO:
10645 case R_PPC64_GOT_TLSGD16_HI:
10646 case R_PPC64_GOT_TLSGD16_HA:
10647 tls_type = TLS_TLS | TLS_GD;
10648 goto dogot;
10649
10650 case R_PPC64_GOT_TLSLD16:
10651 case R_PPC64_GOT_TLSLD16_LO:
10652 case R_PPC64_GOT_TLSLD16_HI:
10653 case R_PPC64_GOT_TLSLD16_HA:
10654 tls_type = TLS_TLS | TLS_LD;
10655 goto dogot;
10656
10657 case R_PPC64_GOT_TPREL16_DS:
10658 case R_PPC64_GOT_TPREL16_LO_DS:
10659 case R_PPC64_GOT_TPREL16_HI:
10660 case R_PPC64_GOT_TPREL16_HA:
10661 tls_type = TLS_TLS | TLS_TPREL;
10662 goto dogot;
10663
10664 case R_PPC64_GOT_DTPREL16_DS:
10665 case R_PPC64_GOT_DTPREL16_LO_DS:
10666 case R_PPC64_GOT_DTPREL16_HI:
10667 case R_PPC64_GOT_DTPREL16_HA:
10668 tls_type = TLS_TLS | TLS_DTPREL;
10669 goto dogot;
10670
10671 case R_PPC64_GOT16:
10672 case R_PPC64_GOT16_LO:
10673 case R_PPC64_GOT16_HI:
10674 case R_PPC64_GOT16_HA:
10675 case R_PPC64_GOT16_DS:
10676 case R_PPC64_GOT16_LO_DS:
10677 dogot:
10678 {
10679 /* Relocation is to the entry for this symbol in the global
10680 offset table. */
10681 asection *got;
10682 bfd_vma *offp;
10683 bfd_vma off;
10684 unsigned long indx = 0;
10685
10686 if (tls_type == (TLS_TLS | TLS_LD)
10687 && (h == NULL
10688 || !h->elf.def_dynamic))
10689 offp = &ppc64_tlsld_got (input_bfd)->offset;
10690 else
10691 {
10692 struct got_entry *ent;
10693
10694 if (h != NULL)
10695 {
10696 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10697 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10698 &h->elf)
10699 || (info->shared
10700 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10701 /* This is actually a static link, or it is a
10702 -Bsymbolic link and the symbol is defined
10703 locally, or the symbol was forced to be local
10704 because of a version file. */
10705 ;
10706 else
10707 {
10708 indx = h->elf.dynindx;
10709 unresolved_reloc = FALSE;
10710 }
10711 ent = h->elf.got.glist;
10712 }
10713 else
10714 {
10715 if (local_got_ents == NULL)
10716 abort ();
10717 ent = local_got_ents[r_symndx];
10718 }
10719
10720 for (; ent != NULL; ent = ent->next)
10721 if (ent->addend == orig_addend
10722 && ent->owner == input_bfd
10723 && ent->tls_type == tls_type)
10724 break;
10725 if (ent == NULL)
10726 abort ();
10727 offp = &ent->got.offset;
10728 }
10729
10730 got = ppc64_elf_tdata (input_bfd)->got;
10731 if (got == NULL)
10732 abort ();
10733
10734 /* The offset must always be a multiple of 8. We use the
10735 least significant bit to record whether we have already
10736 processed this entry. */
10737 off = *offp;
10738 if ((off & 1) != 0)
10739 off &= ~1;
10740 else
10741 {
10742 /* Generate relocs for the dynamic linker, except in
10743 the case of TLSLD where we'll use one entry per
10744 module. */
10745 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10746
10747 *offp = off | 1;
10748 if ((info->shared || indx != 0)
10749 && (h == NULL
10750 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10751 || h->elf.root.type != bfd_link_hash_undefweak))
10752 {
10753 outrel.r_offset = (got->output_section->vma
10754 + got->output_offset
10755 + off);
10756 outrel.r_addend = addend;
10757 if (tls_type & (TLS_LD | TLS_GD))
10758 {
10759 outrel.r_addend = 0;
10760 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10761 if (tls_type == (TLS_TLS | TLS_GD))
10762 {
10763 loc = relgot->contents;
10764 loc += (relgot->reloc_count++
10765 * sizeof (Elf64_External_Rela));
10766 bfd_elf64_swap_reloca_out (output_bfd,
10767 &outrel, loc);
10768 outrel.r_offset += 8;
10769 outrel.r_addend = addend;
10770 outrel.r_info
10771 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10772 }
10773 }
10774 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10775 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10776 else if (tls_type == (TLS_TLS | TLS_TPREL))
10777 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10778 else if (indx == 0)
10779 {
10780 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10781
10782 /* Write the .got section contents for the sake
10783 of prelink. */
10784 loc = got->contents + off;
10785 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10786 loc);
10787 }
10788 else
10789 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10790
10791 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10792 {
10793 outrel.r_addend += relocation;
10794 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10795 outrel.r_addend -= htab->elf.tls_sec->vma;
10796 }
10797 loc = relgot->contents;
10798 loc += (relgot->reloc_count++
10799 * sizeof (Elf64_External_Rela));
10800 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10801 }
10802
10803 /* Init the .got section contents here if we're not
10804 emitting a reloc. */
10805 else
10806 {
10807 relocation += addend;
10808 if (tls_type == (TLS_TLS | TLS_LD))
10809 relocation = 1;
10810 else if (tls_type != 0)
10811 {
10812 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10813 if (tls_type == (TLS_TLS | TLS_TPREL))
10814 relocation += DTP_OFFSET - TP_OFFSET;
10815
10816 if (tls_type == (TLS_TLS | TLS_GD))
10817 {
10818 bfd_put_64 (output_bfd, relocation,
10819 got->contents + off + 8);
10820 relocation = 1;
10821 }
10822 }
10823
10824 bfd_put_64 (output_bfd, relocation,
10825 got->contents + off);
10826 }
10827 }
10828
10829 if (off >= (bfd_vma) -2)
10830 abort ();
10831
10832 relocation = got->output_offset + off;
10833
10834 /* TOC base (r2) is TOC start plus 0x8000. */
10835 addend = -TOC_BASE_OFF;
10836 }
10837 break;
10838
10839 case R_PPC64_PLT16_HA:
10840 case R_PPC64_PLT16_HI:
10841 case R_PPC64_PLT16_LO:
10842 case R_PPC64_PLT32:
10843 case R_PPC64_PLT64:
10844 /* Relocation is to the entry for this symbol in the
10845 procedure linkage table. */
10846
10847 /* Resolve a PLT reloc against a local symbol directly,
10848 without using the procedure linkage table. */
10849 if (h == NULL)
10850 break;
10851
10852 /* It's possible that we didn't make a PLT entry for this
10853 symbol. This happens when statically linking PIC code,
10854 or when using -Bsymbolic. Go find a match if there is a
10855 PLT entry. */
10856 if (htab->plt != NULL)
10857 {
10858 struct plt_entry *ent;
10859 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10860 if (ent->addend == orig_addend
10861 && ent->plt.offset != (bfd_vma) -1)
10862 {
10863 relocation = (htab->plt->output_section->vma
10864 + htab->plt->output_offset
10865 + ent->plt.offset);
10866 unresolved_reloc = FALSE;
10867 }
10868 }
10869 break;
10870
10871 case R_PPC64_TOC:
10872 /* Relocation value is TOC base. */
10873 relocation = TOCstart;
10874 if (r_symndx == 0)
10875 relocation += htab->stub_group[input_section->id].toc_off;
10876 else if (unresolved_reloc)
10877 ;
10878 else if (sec != NULL && sec->id <= htab->top_id)
10879 relocation += htab->stub_group[sec->id].toc_off;
10880 else
10881 unresolved_reloc = TRUE;
10882 goto dodyn;
10883
10884 /* TOC16 relocs. We want the offset relative to the TOC base,
10885 which is the address of the start of the TOC plus 0x8000.
10886 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10887 in this order. */
10888 case R_PPC64_TOC16:
10889 case R_PPC64_TOC16_LO:
10890 case R_PPC64_TOC16_HI:
10891 case R_PPC64_TOC16_DS:
10892 case R_PPC64_TOC16_LO_DS:
10893 case R_PPC64_TOC16_HA:
10894 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10895 break;
10896
10897 /* Relocate against the beginning of the section. */
10898 case R_PPC64_SECTOFF:
10899 case R_PPC64_SECTOFF_LO:
10900 case R_PPC64_SECTOFF_HI:
10901 case R_PPC64_SECTOFF_DS:
10902 case R_PPC64_SECTOFF_LO_DS:
10903 case R_PPC64_SECTOFF_HA:
10904 if (sec != NULL)
10905 addend -= sec->output_section->vma;
10906 break;
10907
10908 case R_PPC64_REL14:
10909 case R_PPC64_REL14_BRNTAKEN:
10910 case R_PPC64_REL14_BRTAKEN:
10911 case R_PPC64_REL24:
10912 break;
10913
10914 case R_PPC64_TPREL16:
10915 case R_PPC64_TPREL16_LO:
10916 case R_PPC64_TPREL16_HI:
10917 case R_PPC64_TPREL16_HA:
10918 case R_PPC64_TPREL16_DS:
10919 case R_PPC64_TPREL16_LO_DS:
10920 case R_PPC64_TPREL16_HIGHER:
10921 case R_PPC64_TPREL16_HIGHERA:
10922 case R_PPC64_TPREL16_HIGHEST:
10923 case R_PPC64_TPREL16_HIGHESTA:
10924 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10925 if (info->shared)
10926 /* The TPREL16 relocs shouldn't really be used in shared
10927 libs as they will result in DT_TEXTREL being set, but
10928 support them anyway. */
10929 goto dodyn;
10930 break;
10931
10932 case R_PPC64_DTPREL16:
10933 case R_PPC64_DTPREL16_LO:
10934 case R_PPC64_DTPREL16_HI:
10935 case R_PPC64_DTPREL16_HA:
10936 case R_PPC64_DTPREL16_DS:
10937 case R_PPC64_DTPREL16_LO_DS:
10938 case R_PPC64_DTPREL16_HIGHER:
10939 case R_PPC64_DTPREL16_HIGHERA:
10940 case R_PPC64_DTPREL16_HIGHEST:
10941 case R_PPC64_DTPREL16_HIGHESTA:
10942 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10943 break;
10944
10945 case R_PPC64_DTPMOD64:
10946 relocation = 1;
10947 addend = 0;
10948 goto dodyn;
10949
10950 case R_PPC64_TPREL64:
10951 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10952 goto dodyn;
10953
10954 case R_PPC64_DTPREL64:
10955 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10956 /* Fall thru */
10957
10958 /* Relocations that may need to be propagated if this is a
10959 dynamic object. */
10960 case R_PPC64_REL30:
10961 case R_PPC64_REL32:
10962 case R_PPC64_REL64:
10963 case R_PPC64_ADDR14:
10964 case R_PPC64_ADDR14_BRNTAKEN:
10965 case R_PPC64_ADDR14_BRTAKEN:
10966 case R_PPC64_ADDR16:
10967 case R_PPC64_ADDR16_DS:
10968 case R_PPC64_ADDR16_HA:
10969 case R_PPC64_ADDR16_HI:
10970 case R_PPC64_ADDR16_HIGHER:
10971 case R_PPC64_ADDR16_HIGHERA:
10972 case R_PPC64_ADDR16_HIGHEST:
10973 case R_PPC64_ADDR16_HIGHESTA:
10974 case R_PPC64_ADDR16_LO:
10975 case R_PPC64_ADDR16_LO_DS:
10976 case R_PPC64_ADDR24:
10977 case R_PPC64_ADDR32:
10978 case R_PPC64_ADDR64:
10979 case R_PPC64_UADDR16:
10980 case R_PPC64_UADDR32:
10981 case R_PPC64_UADDR64:
10982 dodyn:
10983 if ((input_section->flags & SEC_ALLOC) == 0)
10984 break;
10985
10986 if (NO_OPD_RELOCS && is_opd)
10987 break;
10988
10989 if ((info->shared
10990 && (h == NULL
10991 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10992 || h->elf.root.type != bfd_link_hash_undefweak)
10993 && (MUST_BE_DYN_RELOC (r_type)
10994 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10995 || (ELIMINATE_COPY_RELOCS
10996 && !info->shared
10997 && h != NULL
10998 && h->elf.dynindx != -1
10999 && !h->elf.non_got_ref
11000 && h->elf.def_dynamic
11001 && !h->elf.def_regular))
11002 {
11003 Elf_Internal_Rela outrel;
11004 bfd_boolean skip, relocate;
11005 asection *sreloc;
11006 bfd_byte *loc;
11007 bfd_vma out_off;
11008
11009 /* When generating a dynamic object, these relocations
11010 are copied into the output file to be resolved at run
11011 time. */
11012
11013 skip = FALSE;
11014 relocate = FALSE;
11015
11016 out_off = _bfd_elf_section_offset (output_bfd, info,
11017 input_section, rel->r_offset);
11018 if (out_off == (bfd_vma) -1)
11019 skip = TRUE;
11020 else if (out_off == (bfd_vma) -2)
11021 skip = TRUE, relocate = TRUE;
11022 out_off += (input_section->output_section->vma
11023 + input_section->output_offset);
11024 outrel.r_offset = out_off;
11025 outrel.r_addend = rel->r_addend;
11026
11027 /* Optimize unaligned reloc use. */
11028 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11029 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11030 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11031 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11032 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11033 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11034 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11035 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11036 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11037
11038 if (skip)
11039 memset (&outrel, 0, sizeof outrel);
11040 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11041 && !is_opd
11042 && r_type != R_PPC64_TOC)
11043 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11044 else
11045 {
11046 /* This symbol is local, or marked to become local,
11047 or this is an opd section reloc which must point
11048 at a local function. */
11049 outrel.r_addend += relocation;
11050 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11051 {
11052 if (is_opd && h != NULL)
11053 {
11054 /* Lie about opd entries. This case occurs
11055 when building shared libraries and we
11056 reference a function in another shared
11057 lib. The same thing happens for a weak
11058 definition in an application that's
11059 overridden by a strong definition in a
11060 shared lib. (I believe this is a generic
11061 bug in binutils handling of weak syms.)
11062 In these cases we won't use the opd
11063 entry in this lib. */
11064 unresolved_reloc = FALSE;
11065 }
11066 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11067
11068 /* We need to relocate .opd contents for ld.so.
11069 Prelink also wants simple and consistent rules
11070 for relocs. This make all RELATIVE relocs have
11071 *r_offset equal to r_addend. */
11072 relocate = TRUE;
11073 }
11074 else
11075 {
11076 long indx = 0;
11077
11078 if (bfd_is_abs_section (sec))
11079 ;
11080 else if (sec == NULL || sec->owner == NULL)
11081 {
11082 bfd_set_error (bfd_error_bad_value);
11083 return FALSE;
11084 }
11085 else
11086 {
11087 asection *osec;
11088
11089 osec = sec->output_section;
11090 indx = elf_section_data (osec)->dynindx;
11091
11092 if (indx == 0)
11093 {
11094 if ((osec->flags & SEC_READONLY) == 0
11095 && htab->elf.data_index_section != NULL)
11096 osec = htab->elf.data_index_section;
11097 else
11098 osec = htab->elf.text_index_section;
11099 indx = elf_section_data (osec)->dynindx;
11100 }
11101 BFD_ASSERT (indx != 0);
11102
11103 /* We are turning this relocation into one
11104 against a section symbol, so subtract out
11105 the output section's address but not the
11106 offset of the input section in the output
11107 section. */
11108 outrel.r_addend -= osec->vma;
11109 }
11110
11111 outrel.r_info = ELF64_R_INFO (indx, r_type);
11112 }
11113 }
11114
11115 sreloc = elf_section_data (input_section)->sreloc;
11116 if (sreloc == NULL)
11117 abort ();
11118
11119 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11120 >= sreloc->size)
11121 abort ();
11122 loc = sreloc->contents;
11123 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11124 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11125
11126 /* If this reloc is against an external symbol, it will
11127 be computed at runtime, so there's no need to do
11128 anything now. However, for the sake of prelink ensure
11129 that the section contents are a known value. */
11130 if (! relocate)
11131 {
11132 unresolved_reloc = FALSE;
11133 /* The value chosen here is quite arbitrary as ld.so
11134 ignores section contents except for the special
11135 case of .opd where the contents might be accessed
11136 before relocation. Choose zero, as that won't
11137 cause reloc overflow. */
11138 relocation = 0;
11139 addend = 0;
11140 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11141 to improve backward compatibility with older
11142 versions of ld. */
11143 if (r_type == R_PPC64_ADDR64)
11144 addend = outrel.r_addend;
11145 /* Adjust pc_relative relocs to have zero in *r_offset. */
11146 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11147 addend = (input_section->output_section->vma
11148 + input_section->output_offset
11149 + rel->r_offset);
11150 }
11151 }
11152 break;
11153
11154 case R_PPC64_COPY:
11155 case R_PPC64_GLOB_DAT:
11156 case R_PPC64_JMP_SLOT:
11157 case R_PPC64_RELATIVE:
11158 /* We shouldn't ever see these dynamic relocs in relocatable
11159 files. */
11160 /* Fall through. */
11161
11162 case R_PPC64_PLTGOT16:
11163 case R_PPC64_PLTGOT16_DS:
11164 case R_PPC64_PLTGOT16_HA:
11165 case R_PPC64_PLTGOT16_HI:
11166 case R_PPC64_PLTGOT16_LO:
11167 case R_PPC64_PLTGOT16_LO_DS:
11168 case R_PPC64_PLTREL32:
11169 case R_PPC64_PLTREL64:
11170 /* These ones haven't been implemented yet. */
11171
11172 (*_bfd_error_handler)
11173 (_("%B: relocation %s is not supported for symbol %s."),
11174 input_bfd,
11175 ppc64_elf_howto_table[r_type]->name, sym_name);
11176
11177 bfd_set_error (bfd_error_invalid_operation);
11178 ret = FALSE;
11179 continue;
11180 }
11181
11182 /* Do any further special processing. */
11183 switch (r_type)
11184 {
11185 default:
11186 break;
11187
11188 case R_PPC64_ADDR16_HA:
11189 case R_PPC64_ADDR16_HIGHERA:
11190 case R_PPC64_ADDR16_HIGHESTA:
11191 case R_PPC64_TOC16_HA:
11192 case R_PPC64_SECTOFF_HA:
11193 case R_PPC64_TPREL16_HA:
11194 case R_PPC64_DTPREL16_HA:
11195 case R_PPC64_TPREL16_HIGHER:
11196 case R_PPC64_TPREL16_HIGHERA:
11197 case R_PPC64_TPREL16_HIGHEST:
11198 case R_PPC64_TPREL16_HIGHESTA:
11199 case R_PPC64_DTPREL16_HIGHER:
11200 case R_PPC64_DTPREL16_HIGHERA:
11201 case R_PPC64_DTPREL16_HIGHEST:
11202 case R_PPC64_DTPREL16_HIGHESTA:
11203 /* It's just possible that this symbol is a weak symbol
11204 that's not actually defined anywhere. In that case,
11205 'sec' would be NULL, and we should leave the symbol
11206 alone (it will be set to zero elsewhere in the link). */
11207 if (sec == NULL)
11208 break;
11209 /* Fall thru */
11210
11211 case R_PPC64_GOT16_HA:
11212 case R_PPC64_PLTGOT16_HA:
11213 case R_PPC64_PLT16_HA:
11214 case R_PPC64_GOT_TLSGD16_HA:
11215 case R_PPC64_GOT_TLSLD16_HA:
11216 case R_PPC64_GOT_TPREL16_HA:
11217 case R_PPC64_GOT_DTPREL16_HA:
11218 /* Add 0x10000 if sign bit in 0:15 is set.
11219 Bits 0:15 are not used. */
11220 addend += 0x8000;
11221 break;
11222
11223 case R_PPC64_ADDR16_DS:
11224 case R_PPC64_ADDR16_LO_DS:
11225 case R_PPC64_GOT16_DS:
11226 case R_PPC64_GOT16_LO_DS:
11227 case R_PPC64_PLT16_LO_DS:
11228 case R_PPC64_SECTOFF_DS:
11229 case R_PPC64_SECTOFF_LO_DS:
11230 case R_PPC64_TOC16_DS:
11231 case R_PPC64_TOC16_LO_DS:
11232 case R_PPC64_PLTGOT16_DS:
11233 case R_PPC64_PLTGOT16_LO_DS:
11234 case R_PPC64_GOT_TPREL16_DS:
11235 case R_PPC64_GOT_TPREL16_LO_DS:
11236 case R_PPC64_GOT_DTPREL16_DS:
11237 case R_PPC64_GOT_DTPREL16_LO_DS:
11238 case R_PPC64_TPREL16_DS:
11239 case R_PPC64_TPREL16_LO_DS:
11240 case R_PPC64_DTPREL16_DS:
11241 case R_PPC64_DTPREL16_LO_DS:
11242 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11243 mask = 3;
11244 /* If this reloc is against an lq insn, then the value must be
11245 a multiple of 16. This is somewhat of a hack, but the
11246 "correct" way to do this by defining _DQ forms of all the
11247 _DS relocs bloats all reloc switches in this file. It
11248 doesn't seem to make much sense to use any of these relocs
11249 in data, so testing the insn should be safe. */
11250 if ((insn & (0x3f << 26)) == (56u << 26))
11251 mask = 15;
11252 if (((relocation + addend) & mask) != 0)
11253 {
11254 (*_bfd_error_handler)
11255 (_("%B: error: relocation %s not a multiple of %d"),
11256 input_bfd,
11257 ppc64_elf_howto_table[r_type]->name,
11258 mask + 1);
11259 bfd_set_error (bfd_error_bad_value);
11260 ret = FALSE;
11261 continue;
11262 }
11263 break;
11264 }
11265
11266 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11267 because such sections are not SEC_ALLOC and thus ld.so will
11268 not process them. */
11269 if (unresolved_reloc
11270 && !((input_section->flags & SEC_DEBUGGING) != 0
11271 && h->elf.def_dynamic))
11272 {
11273 (*_bfd_error_handler)
11274 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11275 input_bfd,
11276 input_section,
11277 (long) rel->r_offset,
11278 ppc64_elf_howto_table[(int) r_type]->name,
11279 h->elf.root.root.string);
11280 ret = FALSE;
11281 }
11282
11283 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11284 input_bfd,
11285 input_section,
11286 contents,
11287 rel->r_offset,
11288 relocation,
11289 addend);
11290
11291 if (r != bfd_reloc_ok)
11292 {
11293 if (sym_name == NULL)
11294 sym_name = "(null)";
11295 if (r == bfd_reloc_overflow)
11296 {
11297 if (warned)
11298 continue;
11299 if (h != NULL
11300 && h->elf.root.type == bfd_link_hash_undefweak
11301 && ppc64_elf_howto_table[r_type]->pc_relative)
11302 {
11303 /* Assume this is a call protected by other code that
11304 detects the symbol is undefined. If this is the case,
11305 we can safely ignore the overflow. If not, the
11306 program is hosed anyway, and a little warning isn't
11307 going to help. */
11308
11309 continue;
11310 }
11311
11312 if (!((*info->callbacks->reloc_overflow)
11313 (info, (h ? &h->elf.root : NULL), sym_name,
11314 ppc64_elf_howto_table[r_type]->name,
11315 orig_addend, input_bfd, input_section, rel->r_offset)))
11316 return FALSE;
11317 }
11318 else
11319 {
11320 (*_bfd_error_handler)
11321 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11322 input_bfd,
11323 input_section,
11324 (long) rel->r_offset,
11325 ppc64_elf_howto_table[r_type]->name,
11326 sym_name,
11327 (int) r);
11328 ret = FALSE;
11329 }
11330 }
11331 }
11332
11333 /* If we're emitting relocations, then shortly after this function
11334 returns, reloc offsets and addends for this section will be
11335 adjusted. Worse, reloc symbol indices will be for the output
11336 file rather than the input. Save a copy of the relocs for
11337 opd_entry_value. */
11338 if (is_opd && (info->emitrelocations || info->relocatable))
11339 {
11340 bfd_size_type amt;
11341 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11342 rel = bfd_alloc (input_bfd, amt);
11343 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11344 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11345 if (rel == NULL)
11346 return FALSE;
11347 memcpy (rel, relocs, amt);
11348 }
11349 return ret;
11350 }
11351
11352 /* Adjust the value of any local symbols in opd sections. */
11353
11354 static bfd_boolean
11355 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11356 const char *name ATTRIBUTE_UNUSED,
11357 Elf_Internal_Sym *elfsym,
11358 asection *input_sec,
11359 struct elf_link_hash_entry *h)
11360 {
11361 long *opd_adjust, adjust;
11362 bfd_vma value;
11363
11364 if (h != NULL)
11365 return TRUE;
11366
11367 opd_adjust = get_opd_info (input_sec);
11368 if (opd_adjust == NULL)
11369 return TRUE;
11370
11371 value = elfsym->st_value - input_sec->output_offset;
11372 if (!info->relocatable)
11373 value -= input_sec->output_section->vma;
11374
11375 adjust = opd_adjust[value / 8];
11376 if (adjust == -1)
11377 elfsym->st_value = 0;
11378 else
11379 elfsym->st_value += adjust;
11380 return TRUE;
11381 }
11382
11383 /* Finish up dynamic symbol handling. We set the contents of various
11384 dynamic sections here. */
11385
11386 static bfd_boolean
11387 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11388 struct bfd_link_info *info,
11389 struct elf_link_hash_entry *h,
11390 Elf_Internal_Sym *sym)
11391 {
11392 struct ppc_link_hash_table *htab;
11393 struct plt_entry *ent;
11394 Elf_Internal_Rela rela;
11395 bfd_byte *loc;
11396
11397 htab = ppc_hash_table (info);
11398
11399 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11400 if (ent->plt.offset != (bfd_vma) -1)
11401 {
11402 /* This symbol has an entry in the procedure linkage
11403 table. Set it up. */
11404
11405 if (htab->plt == NULL
11406 || htab->relplt == NULL
11407 || htab->glink == NULL)
11408 abort ();
11409
11410 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11411 fill in the PLT entry. */
11412 rela.r_offset = (htab->plt->output_section->vma
11413 + htab->plt->output_offset
11414 + ent->plt.offset);
11415 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11416 rela.r_addend = ent->addend;
11417
11418 loc = htab->relplt->contents;
11419 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11420 * sizeof (Elf64_External_Rela));
11421 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11422 }
11423
11424 if (h->needs_copy)
11425 {
11426 Elf_Internal_Rela rela;
11427 bfd_byte *loc;
11428
11429 /* This symbol needs a copy reloc. Set it up. */
11430
11431 if (h->dynindx == -1
11432 || (h->root.type != bfd_link_hash_defined
11433 && h->root.type != bfd_link_hash_defweak)
11434 || htab->relbss == NULL)
11435 abort ();
11436
11437 rela.r_offset = (h->root.u.def.value
11438 + h->root.u.def.section->output_section->vma
11439 + h->root.u.def.section->output_offset);
11440 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11441 rela.r_addend = 0;
11442 loc = htab->relbss->contents;
11443 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11444 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11445 }
11446
11447 /* Mark some specially defined symbols as absolute. */
11448 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11449 sym->st_shndx = SHN_ABS;
11450
11451 return TRUE;
11452 }
11453
11454 /* Used to decide how to sort relocs in an optimal manner for the
11455 dynamic linker, before writing them out. */
11456
11457 static enum elf_reloc_type_class
11458 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11459 {
11460 enum elf_ppc64_reloc_type r_type;
11461
11462 r_type = ELF64_R_TYPE (rela->r_info);
11463 switch (r_type)
11464 {
11465 case R_PPC64_RELATIVE:
11466 return reloc_class_relative;
11467 case R_PPC64_JMP_SLOT:
11468 return reloc_class_plt;
11469 case R_PPC64_COPY:
11470 return reloc_class_copy;
11471 default:
11472 return reloc_class_normal;
11473 }
11474 }
11475
11476 /* Finish up the dynamic sections. */
11477
11478 static bfd_boolean
11479 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11480 struct bfd_link_info *info)
11481 {
11482 struct ppc_link_hash_table *htab;
11483 bfd *dynobj;
11484 asection *sdyn;
11485
11486 htab = ppc_hash_table (info);
11487 dynobj = htab->elf.dynobj;
11488 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11489
11490 if (htab->elf.dynamic_sections_created)
11491 {
11492 Elf64_External_Dyn *dyncon, *dynconend;
11493
11494 if (sdyn == NULL || htab->got == NULL)
11495 abort ();
11496
11497 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11498 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11499 for (; dyncon < dynconend; dyncon++)
11500 {
11501 Elf_Internal_Dyn dyn;
11502 asection *s;
11503
11504 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11505
11506 switch (dyn.d_tag)
11507 {
11508 default:
11509 continue;
11510
11511 case DT_PPC64_GLINK:
11512 s = htab->glink;
11513 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11514 /* We stupidly defined DT_PPC64_GLINK to be the start
11515 of glink rather than the first entry point, which is
11516 what ld.so needs, and now have a bigger stub to
11517 support automatic multiple TOCs. */
11518 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11519 break;
11520
11521 case DT_PPC64_OPD:
11522 s = bfd_get_section_by_name (output_bfd, ".opd");
11523 if (s == NULL)
11524 continue;
11525 dyn.d_un.d_ptr = s->vma;
11526 break;
11527
11528 case DT_PPC64_OPDSZ:
11529 s = bfd_get_section_by_name (output_bfd, ".opd");
11530 if (s == NULL)
11531 continue;
11532 dyn.d_un.d_val = s->size;
11533 break;
11534
11535 case DT_PLTGOT:
11536 s = htab->plt;
11537 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11538 break;
11539
11540 case DT_JMPREL:
11541 s = htab->relplt;
11542 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11543 break;
11544
11545 case DT_PLTRELSZ:
11546 dyn.d_un.d_val = htab->relplt->size;
11547 break;
11548
11549 case DT_RELASZ:
11550 /* Don't count procedure linkage table relocs in the
11551 overall reloc count. */
11552 s = htab->relplt;
11553 if (s == NULL)
11554 continue;
11555 dyn.d_un.d_val -= s->size;
11556 break;
11557
11558 case DT_RELA:
11559 /* We may not be using the standard ELF linker script.
11560 If .rela.plt is the first .rela section, we adjust
11561 DT_RELA to not include it. */
11562 s = htab->relplt;
11563 if (s == NULL)
11564 continue;
11565 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11566 continue;
11567 dyn.d_un.d_ptr += s->size;
11568 break;
11569 }
11570
11571 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11572 }
11573 }
11574
11575 if (htab->got != NULL && htab->got->size != 0)
11576 {
11577 /* Fill in the first entry in the global offset table.
11578 We use it to hold the link-time TOCbase. */
11579 bfd_put_64 (output_bfd,
11580 elf_gp (output_bfd) + TOC_BASE_OFF,
11581 htab->got->contents);
11582
11583 /* Set .got entry size. */
11584 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11585 }
11586
11587 if (htab->plt != NULL && htab->plt->size != 0)
11588 {
11589 /* Set .plt entry size. */
11590 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11591 = PLT_ENTRY_SIZE;
11592 }
11593
11594 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11595 brlt ourselves if emitrelocations. */
11596 if (htab->brlt != NULL
11597 && htab->brlt->reloc_count != 0
11598 && !_bfd_elf_link_output_relocs (output_bfd,
11599 htab->brlt,
11600 &elf_section_data (htab->brlt)->rel_hdr,
11601 elf_section_data (htab->brlt)->relocs,
11602 NULL))
11603 return FALSE;
11604
11605 /* We need to handle writing out multiple GOT sections ourselves,
11606 since we didn't add them to DYNOBJ. We know dynobj is the first
11607 bfd. */
11608 while ((dynobj = dynobj->link_next) != NULL)
11609 {
11610 asection *s;
11611
11612 if (!is_ppc64_elf_target (dynobj->xvec))
11613 continue;
11614
11615 s = ppc64_elf_tdata (dynobj)->got;
11616 if (s != NULL
11617 && s->size != 0
11618 && s->output_section != bfd_abs_section_ptr
11619 && !bfd_set_section_contents (output_bfd, s->output_section,
11620 s->contents, s->output_offset,
11621 s->size))
11622 return FALSE;
11623 s = ppc64_elf_tdata (dynobj)->relgot;
11624 if (s != NULL
11625 && s->size != 0
11626 && s->output_section != bfd_abs_section_ptr
11627 && !bfd_set_section_contents (output_bfd, s->output_section,
11628 s->contents, s->output_offset,
11629 s->size))
11630 return FALSE;
11631 }
11632
11633 return TRUE;
11634 }
11635
11636 #include "elf64-target.h"
GDB Binutils - Deliverables
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